CN103924474A - Paper humidifying device - Google Patents
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- CN103924474A CN103924474A CN201410197217.6A CN201410197217A CN103924474A CN 103924474 A CN103924474 A CN 103924474A CN 201410197217 A CN201410197217 A CN 201410197217A CN 103924474 A CN103924474 A CN 103924474A
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Abstract
The invention relates to the field of papermaking devices, in particular to a paper humidifying device. The paper humidifying device comprises a humidifying box. The humidifying box comprises a box body, a dummy plate and a steam pipeline, wherein the dummy plate and the steam pipeline are arranged in the box body. The box body is arranged above paper conveyed by a roll shaft, the box body is divided into an upper part and a lower part by the dummy plate, the upper part is an installation chamber, the space between the dummy plate and the paper is a humidifying chamber, the steam pipeline is arranged in the installation chamber, a steam valve is arranged on the steam pipeline, and a nozzle of the steam valve is located in the humidifying chamber. The invention aims to provide an upward side humidifying device, the upward side humidifying device overcomes the technical defects that the steam flow direction of rising steam can not be controlled, and the humidifying effect of the paper is poor.
Description
Technical field
The present invention relates to paper making equipment field, relate in particular to a kind of paper humidifying equipment.
Background technology
Existing paper machine comprises following structure successively: constant part → head box → wet end → press section → drying section → calender → reel machine.But, by drying section be dried, restriction mutually between the quality index " smoothness " of the prepared paper of press polish and " air permeability ", " tightness ", the total quality of paper cannot ensure.Therefore someone imagined before dry and carries out press polish by calender, but in practice, can find that this half moist calendering cannot realize at all, its reason is that paper entirety before being dried all wets, and comprises inside and surface, now carry out press polish, paper does not have moulding meeting to stick on press polish wheel.
In addition, moistening tank on a kind of paper machine is disclosed in Chinese patent 201220737434.6, this moistening tank is between drying section and calender, the paper sheet underneath that nozzle is carried in roll shaft, spray high-temperature steam by nozzle alignment paper, due to paper by drying section after its internal fiber shape, high-temperature steam is converted into aqueous water and is absorbed by paper surface fiber on paper, then its surface smoothness gets a promotion after press polish.But, the weak point of this patent has 2 points: 1, the restriction of operation before existing paper machine, paper machine mainly concentrates on the front of paper for the processing of paper, also just mean if add the moistening tank of this patent just the positive and negative of paper must be overturn on existing paper machine, as overturn by deflecting roller, greatly increase the volume of paper making equipment.2, in order to ensure the smoothly and not wear equipment of paper sheet delivery, the width of paper must be less than the width of humid cabinet, that is to say that space is left in the both sides of paper width direction (perpendicular to throughput direction).The characteristic of steam is irregular floating, and when the below of nozzle in paper, the gas flow of floating steam is unmanageable, and steam can slip out from the space of paper width direction both sides, causes that humidification is inhomogeneous, humidification weak effect.
But, if nozzle is arranged on to paper top, can run into the technical barrier of two aspects: on the one hand, because steam is up floating, spray even if directly aim at paper by nozzle, the absorbent steam of paper institute is all very limited, most of steam all can swim in paper top, moreover the method for directly spraying, very inhomogeneous, poor effect; On the other hand, steam is in paper top, and steam is met cold meeting and condensed into the globule, and the globule is fallen on paper can destroy paper.
Summary of the invention
In order to address the above problem, the object of the invention is to provide a kind of top humidifying equipment, and the gas flow that this top humidifying equipment has overcome floating steam is difficult to control, the technical problem of paper humidification poor effect.Another goal of the invention of the present invention is to overcome steam-condensation and becomes water droplet to be shed to the technical problem of destroying paper product quality on paper.
In order to realize above-mentioned object, the present invention has adopted following technical scheme:
A kind of paper humidifying equipment, comprises moistening tank, and this moistening tank comprises casing and is arranged on dividing plate, the jet chimney in casing; Described casing is in the paper top of roll shaft transmission, and casing is divided into upper and lower two parts by dividing plate, and upper space is installation room, and the space between dividing plate and paper is humid cabinet; Jet chimney is arranged in installation room, and jet chimney is provided with steam valve, and the nozzle on steam valve is in humid cabinet.Provide a kind of nozzle to be arranged on the paper humidifying equipment structure of paper top.
As preferably, described jet chimney at least comprises the first jet chimney on humid cabinet paper feed end, and duct orientation and the sheet transport direction of the first jet chimney are perpendicular, and the steam valve of the first jet chimney is the first steam valve; Described dividing plate comprises deflector, the having along paper delivery direction gradually near the water conservancy diversion trend of paper of this deflector, and the injection direction of the first steam valve is consistent with the water conservancy diversion trend of this deflector.The first steam valve ejection guides and flows forward and downwards along deflector with the steam of initial kinetic energy, and deflector forces steam gradually near paper, has overcome the uncontrollable technical problem that causes humidification poor effect of gas flow of floating steam.
As preferably, described jet chimney also comprises the second jet chimney that is arranged on humid cabinet top, duct orientation and the sheet transport direction of the second jet chimney are perpendicular, and the steam valve on the second jet chimney is the second steam valve, and the injection direction of the second steam valve is towards the paper of roll shaft transmission.When in the first steam valve ejection, with the steam of initial kinetic energy, along deflector, guiding is flowed forward and downwards, if paper somewhere humidification degree is inadequate, as front operation applying glue inequality causes this place's paper humidification degree inadequate, can carry out partial points spray by the second steam valve of correspondence as required strengthens, the humidification degree of the paper that this point is corresponding, the control of the second steam valve can be passed through inspector's manual operations, also can pass through PIC controller auto-control.
As preferably, in the installation room of casing, be also provided with heat exchanger, heat exchanger is provided with steam inlet and steam (vapor) outlet, and jet chimney communicates with the steam (vapor) outlet on heat exchanger, and between heat exchanger and dividing plate, heat conduction is connected.The high steam that in industry, boiler produces, its air pressure is greatly between 0.6 ~ 0.8MPa, temperature is greatly between 200 ~ 230 DEG C, so high-temperature steam directly and paper fibre do the used time, the surface temperature of paper can be by improving between heat exchange, and the too high meeting of the surface temperature of paper makes paper fibre cannot absorb amount of heat, steam cannot be converted into liquid state on fiber, uses so industrial high temperature superheated steam must be reduced to Low Temperature Steam by heat exchanger.And in this equipment, the heat that heat exchanger converts, for by the dividing plate preheating at humid cabinet top, when humidification, can not produce condensed water on its surface after steam floating contacts with dividing plate.
As preferably, described heat exchanger comprises the back-shaped pipeline of heat exchange, multi-disc fin and multi-disc thermal insulation board, multi-disc fin is set in parallel on dividing plate, the back-shaped pipeline of heat exchange is located on fin back and forth, multi-disc thermal insulation board is located at respectively between two adjacent fin, and thermal insulation board is in the back-shaped pipeline of heat exchange top; The back-shaped pipeline of described heat exchange is connected with the conduction of fin heat, and fin is connected with the conduction of dividing plate heat.If dividing plate is directly connected with the back-shaped pipeline of heat exchange, duct bottom area is little, and contact area is little, can cause thermal conduction effect poor.Therefore, be located in fin and be connected with the conduction of dividing plate heat by the back-shaped pipeline of heat exchange, thermal conduction effect is good.
As preferably, between the back-shaped pipeline of heat exchange and jet chimney, be connected with steam treatment device, steam treatment device comprises the air inlet pipe connecting successively, assorted gas tank, gas tank passage, pure qi (oxygen) tank and escape pipe, assorted gas tank is connected with the outlet of heat exchanger by air inlet pipe, and pure qi (oxygen) tank communicates with jet chimney by escape pipe; Described air inlet pipe stretches into assorted gas tank inside, and the lower end of air inlet pipe is provided with current divider, the top of gas tank passage in current divider; This current divider comprises supervisor and many looped pipelines, and many looped pipeline rules are arranged on supervisor's periphery, and the outlet of supervisor lower end exports lower than looped pipeline lower end.When use, pass into boiling water toward the inside of assorted gas tank, the boiling water water surface is responsible for lower end and is in charge of between lower end in current divider, and the boiling water water surface need to not have current divider supervisor gas outlet, did not have current divider to be in charge of gas outlet.Steam in heat exchanging pipe is entered in assorted gas tank by air inlet pipe, and because the impurity such as dust, iron rust is heavier, impurity can be entered in boiling water and be precipitated by supervisor, discharges together with waste water by drainage pipeline.
As preferably, in assorted gas tank, be provided with the sieve plate that filters dust, iron rust, sieve plate is between gas tank passage and current divider.Sieve plate is further filtering for the air of being in charge of outflow.
As preferably, this paper humidifying equipment also comprises lifting pedestal, on lifting pedestal, be provided with identical with upper moistening tank shape and structure, the lower moistening tank of opposite direction, this lower moistening tank and upper moistening tank are arranged on the upper and lower both sides of paper of roll shaft transmission in opposite directions.In the time that technical requirement is high especially, lower moistening tank is raised with upper moistening tank and is offseted by lifting pedestal, upper and lower two casees closing seams, simultaneously humidification.
The present invention adopts technique scheme, this paper humidifying equipment is in order to be combined with the front operation of paper machine, shower nozzle is arranged on to paper top, and adopt novel spray regime, the first nozzle sprays with the steam of initial kinetic energy and guides and flow forward and downwards along deflector, and in conjunction with deflector, along the sheet transport direction feature of close paper gradually, paper humidification is even, and can carry out partial points spray by second nozzle, strengthen the humidification degree of this corresponding position paper.In addition, this equipment has also overcome steam-condensation and has become water droplet to be shed to the technical problem of destroying paper product quality on paper, specifically, by by thermoconverter, the temperature of deflector being improved, prevents the too low steam-condensation that makes of deflector temperature.Adopt paper surface density, printing effect after this humidifying equipment processing all greatly to promote, solve planarization problem, prevent warpage.
Brief description of the drawings
Fig. 1 is external structure schematic diagram of the present invention.
Fig. 2 is the internal structure schematic diagram of upper moistening tank.
Fig. 3 is the internal structure side view of upper moistening tank.
Fig. 4 is the structural representation of the first steam valve or the second steam valve.
Fig. 5 is the A-A portion cutaway view of Fig. 4.
Fig. 6 is the structural representation of steam treatment device.
Fig. 7 is the structural representation of injector.
Fig. 8 is the schematic diagram that upper and lower two tanks is produced simultaneously.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the invention are described in further detail.
A kind of paper humidifying equipment as shown in Fig. 1 ~ 8, this equipment is before calender.This paper humidifying equipment comprises frame, filter, upper moistening tank 2, steam treatment device 4 and multiple pressure control device.Upper moistening tank 2 comprises casing 21 and is arranged on heat exchanger 23, front airduct 24, dividing plate 27, the first jet chimney 25, the second jet chimney 26 in casing 21.Equipment passes into after industrial high steam, and steam is successively by filter, pressure control device, heat exchanger 23, steam treatment device 4, pressure control device, the first jet chimney 25 or the second jet chimney 26, humidifier chamber and front airduct 24.Pressure control device has comprised pressure sensor and motor valve, and because air pressure and the temperature of gas are closely-related, specifically temperature is low, contraction of gas, and density increases, and air pressure increases; Temperature is high, gas expansion, and density reduces, and air pressure reduces; Therefore record steam pressure by pressure sensor, and then just can control the temperature of steam.
The casing 21 non-sealings in bottom of upper moistening tank 2, about 2cm place on its bottom paper 8 in transmitting by roll shaft when use, casing 21 is divided into two parts by dividing plate 27, and the upper space of dividing plate 27 is installation room 211, and the position between dividing plate 27 and paper 8 is humid cabinet 212.Heat exchanger 23, front airduct 24, the first jet chimney 25 and the second jet chimney 26 are all arranged in installation room 211.Front airduct 24 communicates with the paper delivery end of humid cabinet 212, and front airduct 24 is taken exhaustless steam in humid cabinet 212 away, and more than preventing, vapour is blown out outside case with the motion of paper, causes condensing drip in other place of paper machine.
Dividing plate 27 comprises a deflector 271, and this deflector 271 has along the paper delivery direction water conservancy diversion trend of close paper 8 gradually.The first jet chimney 25 and the second jet chimney 26 all arrange dividing plate 27 tops, and the throughput direction of the duct orientation of two pipes and paper 8 is perpendicular, on the paper feed end of the first jet chimney 25 in humid cabinet 212, on the first jet chimney 25, axially spaced set has one to ranked first steam valve 5, the injection direction of the first steam valve 5 is consistent with the water conservancy diversion trend of deflector 271, is preferably parallel with paper 8 throughput directions; The paper feed end top of the second jet chimney 26 in humid cabinet 212, on the second jet chimney 26, axially spaced set has one to ranked second the injection direction of steam valve 6, the second steam valves 6 towards the paper 8 of roll shaft transmission, is preferably vertical with paper 8 throughput directions.This moistening tank has two kinds of humidification modes, and a kind of mode is that steam that the second steam valve 6 sprays moves downward with paper 8 and contacts, and the method there is not requirement for the shape of humid cabinet 212, and inhomogeneous but shortcoming is in spray regime, vapor absorption amount is few; Another kind method be the first steam valve 5 spray with the steam of initial kinetic energy along deflector 271 forward and guiding downwards flow, can also carry out as required the humidification degree of the paper 8 that this point of partial points spray enhancing is corresponding by the second steam valve 6, the control of the second steam valve 6 can be passed through inspector's manual operations, also can pass through PIC controller auto-control.The second humidification modes that adopt when actual use more, because steam contacts soft, even, adjustable in the second way with paper 8, but, in second method, the shape of deflector 271, temperature are all to need to limit, the shape relation of deflector 271 trend of steam, thereby affects the effect of humidification; Deflector 271 temperature are relevant with the formation of condensed water, if the temperature of deflector 271 is too low, steam is when deflector 271 contacts to produce condensed water, and condensed water is low affects humidifying process to paper 8.
Shape, the structure of the first steam valve 5 and the second steam valve 6 are identical, have included hollow valve body 51, nozzle 52 and valve rod 53; Hollow valve body 51 two ends welded seals are on the first jet chimney 25 or the second jet chimney 26, and hollow valve body 51 1 sides are provided with valve port 54, and valve port 54 is in jet chimney inside center place; The inner passage of hollow valve body 51 is divided into breather line 511 to valve port 54 and valve rod is installed passage 512, nozzle 52 is connected on the end of hollow valve body 51 and nozzle 52 communicates with the breather line 511 of hollow valve body 51, valve rod 53 screw threads are located in the installation passage 512 of hollow valve body 51, valve rod 53 is inner to offset through valve port 54 import rear and breather line 511, in the exposed jet chimney in the inner of valve rod 53.When use, by valve rod 53 is outwards screwed out, steam sprays by nozzle 52 after entering the import of breather line 511; Due to valve rod 53 inner this with regard to exposed in jet chimney, steam in jet chimney carries out preheating to it, therefore after valve rod 53 unclamps steam can its surface meet cold, condense, solved steam by valve to a difficult problem of meeting cold formation condensed water between nozzle.It should be noted that the valve port 54 on the second steam valve 6 must be on the interior sidewall surface bottom of the second jet chimney 26, in any case because regulation and control, in the interior sidewall surface of the second jet chimney 26, be certain to exist condensed water, these condensed waters can be gathered in the bottom of the second jet chimney 26, if do not have valve port 54, these condensed waters can be ejected on paper 8 by the second steam valve 6, and the first steam valve 5 is owing to being horizontal positioned, there is no this technical problem.
Heat exchanger 23 has optional two kinds of structures: the first structure, heat exchanger 23 has comprised the back-shaped pipeline 231 of heat exchange, in multi-disc fin 232(accompanying drawing 2, use the longitudinal lines vertical with 231 to represent) and multi-disc thermal insulation board 233, multi-disc fin 232 is welded in parallel on dividing plate 27, the back-shaped pipeline 231 of heat exchange is located on fin 232 back and forth, multi-disc thermal insulation board 233 is located at respectively between two adjacent fin 232, thermal insulation board 233 is in the back-shaped pipeline of heat exchange 231 tops, thermal insulation board 233 can stop the heat of the back-shaped pipeline 231 of heat exchange to scatter and disappear from the top of casing 21.The back-shaped pipeline of heat exchange is connected with the conduction of fin heat, and fin is connected with the conduction of dividing plate heat.If dividing plate is directly connected with the back-shaped pipeline of heat exchange, duct bottom area is little, and contact area is little, can cause thermal conduction effect poor.Therefore, be located in fin and be connected with the conduction of dividing plate heat by the back-shaped pipeline of heat exchange, thermal conduction effect is good.The back-shaped pipeline 231 of heat exchange can specifically be divided into steam inlet tube 231a, steam goes out to manage 231b and Duo Gen steam is in charge of 231c, steam inlet tube 231a is used for passing into industrial superheated steam, steam goes out to manage the steam after 231b exchanges for heat outputting, and many steam are in charge of 231c and are gone out to manage 231b for connecting steam inlet tube 231a and steam.When use, in the back-shaped pipeline 231 of heat exchange mobile high-temperature steam inlet side with go out under the poor condition of end pressure, heat is passed and is transmitted to deflector 271 by fin 232 from high pressure tube wall.The second structure (accompanying drawing is without this structure), dividing plate, by the middle part sealing of top box body, is welded into a pressure vessel by the installation portion between dividing plate and top box body, and this container has steam inlet, steam (vapor) outlet and condensation-water drain; When use, can in container, add 0.12MPa low-pressure low-temperature steam directly with dividing plate 27 heat exchanges by steam inlet, steam cooling be discharged by condensation-water drain after becoming condensed water; Also can be in container, 0.6MPa industry superheated steam to be mixed with 80 ~ 100 DEG C of condensation water smokes, make the Low Temperature Steam that pressure is 0.3MPa, use by steam (vapor) outlet, rear supply the first jet chimney 25 of steam treatment device 4, the second jet chimney 26, and steam is further controlled to 0.12MPa steam simultaneously and heats to dividing plate 27.No matter any mode, its key point all ensures that the bulk temperature of dividing plate 27 is constant between 60 ~ 70 DEG C.
This equipment can also below upper moistening tank 2, arrange one identical with its shape, structure, the lower moistening tank 3 of opposite direction, the difference of upper moistening tank 2 and lower moistening tank 3 is mainly on mounting means, specifically: upper moistening tank 2 is provided with hanger 22, and upper moistening tank 2 is fixed in frame by hanger 22; Lower moistening tank 3 is fixed on the lifting pedestal of frame bottom, go up moistening tank 2 and lower moistening tank 3 and is separately positioned on the paper that roll shaft transmits Shang Xia 8 both sides.Lifting pedestal is specifically made up of lift cylinders 111, lifting base plate 112 and lifting support 113, lifting base plate 112 is fixed on lifting support 113 upper ends, the output of lift cylinders 111 is connected to the lower end of lifting base plate 112, between the upper lower beam of lifting support 113, be hinged, lift cylinders 111 drives lifting base plate 112 to move up and down.In the time that reality is used, due to the restriction of the front operation of paper machine, mainly concentrate on the front of paper 8 for the processing of paper 8, what therefore in this device fabrication, mainly use is upper moistening tank 2, can put into production separately by above moistening tank 2, but requires to be that paper machine copy paper speed is slower, be less than 200 ms/min, and the wettability power of paper 8 own is stronger, paper 8 is less demanding for the smoothness of reverse side, as the facing paper in furniture outside.And if paper machine copy paper speed, being greater than 200 ms/min or paper kind requires the large or paper 8 of amount of humidification in the time that applying glue of preceding working procedure is difficult for humidification or require to control the paper kind that paper 8 smoothness for two sides differences are little, paper 8 is quantitatively high, need two casees to produce, this at present moistening tank 3 raise with upper moistening tank 2 and offset by lifting pedestal, upper and lower two casees closing seams, simultaneously humidification.It is to be noted, although internal structure, the principle of upper moistening tank 2 and lower moistening tank 3 are all identical, but lower moistening tank 3 can only be served as the auxiliary of moistening tank 2, can not descend separately moistening tank 3 to produce, its reason is: as said in background technology, for the smoothly and not wear equipment of guaranteeing that paper 8 carries, the width of paper 8 must be less than the width of humid cabinet 212, that is to say that space is left in the both sides of paper 8 widths (perpendicular to throughput direction).And the below of the nozzle of lower moistening tank 3 in paper 8, the characteristic of steam is toward floating, and the gas flow of floating steam is uncontrollable, and when single nowel is produced, steam can slip out from the space of paper 8 width both sides, cause humidification weak effect, humidification inhomogeneous.Therefore, although the below of the nozzle of lower moistening tank 3 in paper 8, the phenomenon that does not exist water droplet to come off on paper 8, its humidification weak effect, inhomogeneous.When not excessive upper and lower simultaneously production for two casees, upper and lower two casees closing seams, the steam in nowel can not slip out, and by the water conservancy diversion shape of upper and lower two casees deflectors 271, steam can cover full size 8 completely, and humidification effect is very good.
Steam treatment device 4 comprises air inlet pipe 41, assorted gas tank 42, drainage pipeline 43, two pure qi (oxygen) tanks 44 and two outlet pipes 45.Assorted gas tank 42 goes out to manage 231b by air inlet pipe 41 with the steam of heat exchanger 23 and is connected, air inlet pipe 41 is assorted gas tank 42 inside deeply, the lower end of air inlet pipe 41 is provided with current divider 46, this current divider 46 comprises supervisor 461 and four looped pipelines 462, four looped pipeline 462 rules are arranged on supervisor's 461 peripheries, and supervisor 461 lower surface is lower than the lower surface of looped pipeline 462.Between two pure qi (oxygen) tanks 44 and assorted gas tank 42, communicate by gas tank passage 421 and reflux line 422, the upper end of reflux line 422 connects the bottom of pure qi (oxygen) tank 44, the top of gas tank passage 421 in reflux line 422 and current divider 46; In assorted gas tank 42 between gas tank passage 421 and current divider 46, be also provided with the sieve plate 423 that filters dust, iron rust.The bottom of two outlet pipes 45 is connected to respectively the upper end of two pure qi (oxygen) tanks 44, two pure qi (oxygen) tanks 44 are connected respectively and on the first jet chimney 25 and 26, two pure qi (oxygen) tanks 44 of the second jet chimney, are also connected with thermometer and Pressure gauge for measuring temperature and air pressure by outlet pipe 45.Drainage pipeline 43 is in assorted gas tank 42 belows, and drainage pipeline 43 is provided with draining valve.
When use, pass into boiling water toward the inside of assorted gas tank 42, the boiling water water surface is between current divider supervisor lower end outlet and the outlet of looped pipeline lower end, and the boiling water water surface need to not have current divider supervisor to give vent to anger, and did not have current divider looped pipeline to give vent to anger.Steam in the back-shaped pipeline 231 of heat exchange is entered in assorted gas tank 42 by air inlet pipe 41, and because the impurity such as dust, iron rust is heavier, most of impurity can enter in boiling water and precipitates by being responsible for 461, discharges together with boiling water by drainage pipeline 43; Steam and fraction impurity are flowed out by the looped pipeline of periphery, and the air that sieve plate 423 flows out for looped pipeline is further filtering, and by double medium filtration, in the steam of nozzle ejection, almost there is no impurity, have ensured the tidiness on paper 8 surfaces.Meanwhile, owing to passing through boiling water before the steam of pure qi (oxygen) tank 44, steam is more sufficient, is easy to produce condensed water, and reflux line 422 arrives in assorted gas tank 42 for the condensate return in pure qi (oxygen) tank 44.
In addition, in order to save the energy, recycle steam, the drainage pipeline 43 of steam treatment device 4 is connected with flash tank, the boiling water that drainage pipeline 43 is discharged enters in flash tank, steam inlet place at the back-shaped pipeline 231 of heat exchange arranges injector 9, and the Steam Recovery of boiling water in flash tank being changed by injector 9 is to the back-shaped pipeline 231 of heat exchange.Specifically injector 9 has comprised hollow body 91 and injection bar 92, hollow body 91 is arranged on the back-shaped pipeline 231 of heat exchange, injection bar 92 connects flash tank, the inner passage of hollow body 91 is provided with gas mixing chamber 93, when hollow body 91 inside pass into steam, steam flow at high speed produces low pressure, and the steam in flash tank is incorporated in hollow body 91 from injection bar 92.
Paper 8 surface compact degree and the printing effect produced by above paper 8 humidifying equipments all increase substantially, and solve planarization problem, prevent warpage.Its concrete step is as follows:
1) ventilation, passes into industrial superheated steam, and the air pressure of steam is between 0.6 ~ 0.8MPa, and temperature is between 200 ~ 230 DEG C;
2) filter, adopt filter that bulky grain iron rust, dust-filtering in industrial superheated steam are fallen;
3) step-down, reduces to the industrial superheated steam after filtering by pressure sensor and motor valve the constant pressure steam of 0.4 ~ 0.45MPa;
4) heat exchange, the constant pressure steam of 0.4 ~ 0.45MPa passes in heat exchanger 23, heat exchanger 23 structures are selected the first structure of mentioning in the application, in the back-shaped pipeline 231 of heat exchange flow 0.4 ~ 0.45MPa constant pressure steam inlet side with go out under the poor condition of end pressure, heat is passed and is transmitted to deflector 271 by fin 232 from high pressure tube wall, ensure that the bulk temperature of deflector 271 is constant between 60 ~ 70 DEG C;
5) steam treatment, steam in the back-shaped pipeline 231 of heat exchange passes into steam treatment device 4, the interior priority of steam treatment device 4 is filtered granule iron rust, dust by current divider, sieve plate, in the boiling water passing in steam treatment device, gas floats through after boiling water, enter in pure qi (oxygen) tank by gas tank passage, carry out after the test of temperature and air pressure in pure qi (oxygen) tank, the constant steam with 150 ~ 155 DEG C is exported;
6) step-down, air pressure steam being fallen by pressure sensor and motor valve is between 0.3 ~ 0.35MPa, and temperature is 130 DEG C of left and right;
7) spray, steam passes in the first jet chimney 25 or the second jet chimney 26, then is ejected on paper 8 by the first steam valve 5 or the second steam valve 6, and steam is converting liquid state in the enterprising promoting the circulation of qi state of paper fibre;
8) moulding, paper 8 is batched and is become finished product by reel machine by calender nip with 55 DEG C of paper Wen Zaicong outlets.
Realize this goal of the invention, in above-mentioned steps, the core of most critical is to realize steam and on page, is converted into aqueous water and is absorbed by paper fibre, this requires page self-temperature before contacting with steam lower on the one hand, while contact with steam, produce exchange heat, the temperature difference is larger, and the aqueous water that paper fibre absorbs is more; Because hyperthermia and superheating steam is direct and paper fibre is done the used time, paper fibre cannot absorb amount of heat on the other hand, and steam cannot be converted into liquid state on fiber, becomes Low Temperature Steam use so industrial high temperature superheated steam must be lowered the temperature.
Claims (8)
1. a paper humidifying equipment, is characterized in that: comprise moistening tank, this moistening tank comprises casing and is arranged on dividing plate, the jet chimney in casing; Described casing is in the paper top of roll shaft transmission, and casing is divided into upper and lower two parts by dividing plate, and upper space is installation room, and the space between dividing plate and paper is humid cabinet; Jet chimney is arranged in installation room, and jet chimney is provided with steam valve, and the nozzle on steam valve is in humid cabinet.
2. a kind of paper humidifying equipment according to claim 1, it is characterized in that: described jet chimney at least comprises the first jet chimney on humid cabinet paper feed end, duct orientation and the sheet transport direction of the first jet chimney are perpendicular, and the steam valve of the first jet chimney is the first steam valve; Described dividing plate comprises deflector, the having along paper delivery direction gradually near the water conservancy diversion trend of paper of this deflector, and the injection direction of the first steam valve is consistent with the water conservancy diversion trend of this deflector.
3. a kind of paper humidifying equipment according to claim 2, it is characterized in that: described jet chimney also comprises the second jet chimney that is arranged on humid cabinet top, duct orientation and the sheet transport direction of the second jet chimney are perpendicular, steam valve on the second jet chimney is the second steam valve, and the injection direction of the second steam valve is towards the paper of roll shaft transmission.
4. a kind of paper humidifying equipment according to claim 1, it is characterized in that: in the installation room of casing, be also provided with heat exchanger, heat exchanger is provided with steam inlet and steam (vapor) outlet, and jet chimney communicates with the steam (vapor) outlet on heat exchanger, and between heat exchanger and dividing plate, heat conduction is connected.
5. a kind of paper humidifying equipment according to claim 4, it is characterized in that: described heat exchanger comprises the back-shaped pipeline of heat exchange, multi-disc fin and multi-disc thermal insulation board, multi-disc fin is set in parallel on dividing plate, the back-shaped pipeline of heat exchange is located on fin back and forth, multi-disc thermal insulation board is located at respectively between two adjacent fin, and thermal insulation board is in the back-shaped pipeline of heat exchange top; The back-shaped pipeline of described heat exchange is connected with the conduction of fin heat, and fin is connected with the conduction of dividing plate heat.
6. a kind of paper humidifying equipment according to claim 5, it is characterized in that: between the back-shaped pipeline of heat exchange and jet chimney, be connected with steam treatment device, steam treatment device comprises the air inlet pipe connecting successively, assorted gas tank, gas tank passage, pure qi (oxygen) tank and escape pipe, assorted gas tank is connected with the outlet of heat exchanger by air inlet pipe, and pure qi (oxygen) tank communicates with jet chimney by escape pipe; Described air inlet pipe stretches into assorted gas tank inside, and the lower end of air inlet pipe is provided with current divider, the top of gas tank passage in current divider; This current divider comprises supervisor and many looped pipelines, and many looped pipeline rules are arranged on supervisor's periphery, and the outlet of supervisor lower end exports lower than looped pipeline lower end.
7. a kind of paper humidifying equipment according to claim 6, is characterized in that: in assorted gas tank, be provided with the sieve plate that filters dust, iron rust, sieve plate is between gas tank passage and current divider.
8. a kind of paper humidifying equipment according to claim 1, it is characterized in that: this paper humidifying equipment also comprises lifting pedestal, on lifting pedestal, be provided with identical with upper moistening tank shape and structure, the lower moistening tank of opposite direction, this lower moistening tank and upper moistening tank are arranged on the upper and lower both sides of paper of roll shaft transmission in opposite directions.
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| CN201410197217.6A CN103924474B (en) | 2014-05-09 | 2014-05-09 | A kind of paper humidifying equipment |
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| CN201410197217.6A CN103924474B (en) | 2014-05-09 | 2014-05-09 | A kind of paper humidifying equipment |
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| CN103924474A true CN103924474A (en) | 2014-07-16 |
| CN103924474B CN103924474B (en) | 2016-05-04 |
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| CN201410197217.6A Active CN103924474B (en) | 2014-05-09 | 2014-05-09 | A kind of paper humidifying equipment |
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| CN (1) | CN103924474B (en) |
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| CN104153237A (en) * | 2014-08-07 | 2014-11-19 | 浙江汉普新材料技术有限公司 | Paper moistening equipment with high water-steam separation degree |
| CN104894911A (en) * | 2015-05-19 | 2015-09-09 | 山东伟国板业科技有限公司 | Plate humidification and heating device |
| CN106245436A (en) * | 2016-07-26 | 2016-12-21 | 佛山市南海区新永泰胶粘制品有限公司 | The superheated steam release paper rewetting equipment of a kind of static electrification field and manufacturing process thereof |
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| CN104153237A (en) * | 2014-08-07 | 2014-11-19 | 浙江汉普新材料技术有限公司 | Paper moistening equipment with high water-steam separation degree |
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