CN103938483B - A kind of paper humidifying equipment on paper machine - Google Patents
A kind of paper humidifying equipment on paper machine Download PDFInfo
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- CN103938483B CN103938483B CN201410195689.8A CN201410195689A CN103938483B CN 103938483 B CN103938483 B CN 103938483B CN 201410195689 A CN201410195689 A CN 201410195689A CN 103938483 B CN103938483 B CN 103938483B
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Abstract
The present invention relates to paper making equipment field, particularly relate to the paper humidifying equipment on a kind of paper machine.A kind of paper humidifying equipment on paper machine, including upper moistening tank, on this, moistening tank includes casing and the heat exchanger, dividing plate and the jet chimney that are arranged in casing, and heat exchanger is provided with steam inlet and steam (vapor) outlet, and jet chimney communicates with the steam (vapor) outlet on heat exchanger；Described casing is in above the paper 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；Described heat exchanger and jet chimney are arranged in installation room, and between heat exchanger with dividing plate, conduction of heat is connected, and jet chimney is provided with steam valve, and the nozzle on steam valve is in humid cabinet.Adopt the paper surface consistency after the processing of this humidifying equipment, printing effect to be all greatly promoted, solve planarization problem, prevent warpage.
Description
Technical field
The present invention relates to paper making equipment field, particularly relate to the paper humidifying equipment on a kind of paper machine.
Background technology
Existing paper machine includes following structure successively: constant part → head box → wet end → press section → drying section → calender → reel machine.But, it being dried by drying section, mutually restrict between the quality index " smoothness ", " air permeability " and " tightness " of paper obtained by press polish, the total quality of paper cannot ensure.Therefore someone imagines and carries out press polish by calender before the drying, but finding that this half moist calendering cannot realize in practice, its reason is in that paper entirety before the drying is all wet, including inside and surface at all, now carrying out press polish, paper does not have molding can stick on press polish wheel.
Additionally, the moistening tank on a kind of paper machine disclosed in Chinese patent 201220737434.6, this moistening tank is between drying section and calender, nozzle is in the paper sheet underneath of roll shaft conveying, high-temperature steam is sprayed by nozzle alignment paper, owing to paper is shaped by its internal fiber after drying section, high-temperature steam is converted into aqueous water on paper and is absorbed by paper surface fiber, gets a promotion then through its surface smoothness after press polish.But, the weak point of this patent has 2 points: 1, the restriction of operation before existing paper machine, paper machine is concentrated mainly on the front of paper for the processing of paper, also imply that if the moistening tank adding this patent on existing paper machine is necessary for overturning the positive and negative of paper, as overturn by deflecting roller, considerably increase the volume of paper making equipment.2, in order to ensure the smooth of paper sheet delivery and not wear equipment, the width of paper must be less than the width of humid cabinet, say, that space is left in the both sides that paper width direction (is namely transversely to the conveying direction).The characteristic of steam is irregular floating, and when nozzle is in the lower section of 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 uneven, moisturization effect is poor.
For these reasons, just someone devises a kind of nozzle and is in the upper humidifying equipment above paper, but practice can find the technical barrier that on this, operating surface of humidifying equipment is finally very big, wherein especially prominent problem is that the steam cold meeting of chance condenses into the globule, the globule is fallen and can be destroyed paper on paper, main reason is that of this this problem of generation, and a large amount of steam in spray booth float the top plate contact with casing, and roof box temperature is relatively low, steam can end face liquefaction under the top plate.
Therefore, it is badly in need of a overcoming steam to be condensed into water droplet to be shed on paper to destroy the paper humidifying equipment of technical problem of paper product quality.
Summary of the invention
In order to solve the problems referred to above, it is an object of the invention to provide a kind of paper humidifying equipment, shower nozzle is arranged on above paper by this paper humidifying equipment, and overcomes steam and be condensed into water droplet and be shed on paper to destroy the technical problem of paper product quality.
In order to realize above-mentioned purpose, present invention employs following technical scheme:
A kind of paper humidifying equipment on paper machine, including upper moistening tank, on this, moistening tank includes casing and the heat exchanger, dividing plate and the jet chimney that are arranged in casing, and heat exchanger is provided with steam inlet and steam (vapor) outlet, and jet chimney communicates with the steam (vapor) outlet on heat exchanger；Described casing is in above the paper 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；Described heat exchanger and jet chimney are arranged in installation room, and between heat exchanger with dividing plate, conduction of heat is connected, and jet chimney is provided with steam valve, and the nozzle on steam valve is in humid cabinet.The high steam that in industry, boiler produces, its air pressure is approximately between 0.6 ~ 0.8MPa, temperature is approximately between 200 ~ 230 DEG C, such high temperature super heated steam is directly and during paper fibre effect, the surface temperature of paper can be passed through to improve between heat exchange, and the too high meeting of surface temperature of paper makes paper fibre cannot absorb amount of heat, steam cannot be converted into liquid 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 is for preheating the dividing plate at humid cabinet top, during humidification, steam floats and will not produce condensed water after baffle contacts on its surface.
As preferably, steam valve includes the hollow valve body that two ends are fixed on jet chimney, is connected to the nozzle on hollow valve body end and is located in the valve rod of hollow body；Described hollow valve body is provided with the valve port being in jet chimney, and the inner passage of hollow valve body is divided into breather line and valve rod to install passage by valve port；Nozzle communicates with the breather line of hollow valve body, and valve rod is located in the valve rod of hollow valve body and installs in passage, and the import of the inner traverse valve port of valve rod and breather line offsets, and the inner of valve rod is exposed in jet chimney.During start, hollow valve body in jet chimney, the pipeline in hollow valve body and the valve stem being exposed in valve port are preheated by steam, will not meet on its surface cold when regulating steam after valve unclamps, condense, solve steam between nozzle, met a difficult problem for cold formation condensed water by valve.
As preferably, described jet chimney at least includes the first jet chimney being arranged on humid cabinet paper feed end, and the duct orientation of the first jet chimney is perpendicular with sheet transport direction, and the steam valve on the first jet chimney is the first steam valve；Described dividing plate includes deflector, and this deflector has the water conservancy diversion trend moving closer to paper along paper delivery direction, and the injection direction of the first steam valve is consistent with the water conservancy diversion trend of this deflector.First steam valve ejection guides forward and downwards flowing, deflector to force steam to move closer to paper with the steam of initial kinetic energy along deflector, and the gas flow overcoming floating steam is the uncontrollable technical problem causing moisturization effect not good.
As preferably, described jet chimney also includes the second jet chimney being arranged on above humid cabinet, the duct orientation of the second jet chimney is perpendicular with sheet transport direction, and the steam valve on the second jet chimney is the second steam valve, the paper that the injection direction of the second steam valve transmits towards roll shaft.When the first steam valve ejection forward and downwards guides flowing with the steam of initial kinetic energy along deflector, if paper somewhere humidification degree is inadequate, as front operation applying glue inequality causes that this place's paper humidification degree is inadequate, partial points spray can be carried out as desired by the second corresponding steam valve, strengthen the humidification degree of paper corresponding to this point, the control of the second steam valve can pass through coroner's manual operations, it is also possible to by PIC controller auto-control.
As preferably, the valve port of the second steam valve is on the bottom surface, medial wall of the second jet chimney.In any case because regulation and control, the interior sidewall surface of the second jet chimney there will certainly be condensed water, these condensed waters can be gathered in the bottom of the second jet chimney, if not having valve port, these condensed waters can be ejected on paper by the second steam valve, and the first steam valve is owing to being horizontal positioned, it does not have this phenomenon.
As preferably, described heat exchanger includes 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 wears on a heat sink back and forth, multi-disc thermal insulation board is respectively provided between adjacent two piece fin, and thermal insulation board is in above the back-shaped pipeline of heat exchange；The back-shaped pipeline of described heat exchange is connected with fin conduction of heat, and fin is connected with dividing plate conduction of heat.If be directly connected with the back-shaped pipeline of heat exchange by dividing plate, duct bottom area is little, and contact area is little, can cause that thermal conduction effect is poor.Being located in fin be connected with dividing plate conduction of heat by the back-shaped pipeline of heat exchange, thermal insulation board stops the heat of the back-shaped pipeline of heat exchange to scatter and disappear from the top of casing, and overall thermal conducting effect is good.
As preferably, it is connected to steam processor between the back-shaped pipeline of heat exchange and jet chimney, steam processor includes the air inlet pipe, miscellaneous QI tank, gas tank passage, pure qi (oxygen) tank and the escape pipe that are sequentially connected with, miscellaneous QI tank is connected with the outlet of heat exchanger by air inlet pipe, and pure qi (oxygen) tank is communicated with jet chimney by escape pipe；Described air inlet pipe stretches into inside miscellaneous QI tank, and the lower end of air inlet pipe is provided with diverter, and gas tank passage is in the top of diverter；This diverter includes 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 the lower end of looped pipeline.During use, the inside toward miscellaneous QI tank passes into boiling water, and the boiling water water surface is between diverter supervisor lower end and looped pipeline lower end, and namely the boiling water water surface needs do not have diverter supervisor gas outlet, does not have diverter looped pipeline gas outlet.Steam in heat exchanging pipe is entered in miscellaneous QI tank by air inlet pipe, and owing to the impurity such as dust, rust is heavier, major part impurity can pass through to be responsible for precipitation in entrance boiling water.
As preferably, being provided with the sieve plate filtering dust, rust in miscellaneous QI tank, sieve plate is between gas tank passage and diverter.The air that sieve plate flows out for looped pipeline is further filtering.
As preferably, this paper humidifying equipment also includes lifting pedestal, and lifting pedestal is provided with identical with upper moistening tank shape and structure, in opposite direction lower moistening tank, and this lower moistening tank and upper moistening tank are oppositely arranged the upper and lower both sides of paper in roll shaft transmission.When technology requires high especially, lower moistening tank is raised by lifting pedestal and is offseted with upper moistening tank, and upper and lower two casees closing seams are humidified simultaneously.
The present invention adopts technique scheme, and this paper humidifying equipment is combined for the front operation with paper machine, is arranged on by shower nozzle above paper, overcome steam be condensed into water droplet be shed on paper destroy paper product quality technical problem.Especially by following 2 realizations, 1, conduct heat on dividing plate by thermoconverter, improve baffle temperature, it is prevented that baffle temperature is too low makes steam condense；2, valve body is embedded in spray booth by nozzle, two ends welded seal, and spray booth steam heats to valve, solves steam and is met a difficult problem for cold formation condensed water by valve between nozzle；Additionally, this humidifying equipment have employed novel spray regime, namely first jet ejection guides forward and downwards flowing with the steam of initial kinetic energy along deflector, move closer to the feature of paper along sheet transport direction in conjunction with deflector, paper humidification uniformly, and can carry out partial points spray by second nozzle, strengthen the humidification degree of paper corresponding to this point, adopt the paper surface consistency after the processing of this humidifying equipment, printing effect to be all greatly promoted, solve planarization problem, it is prevented that warpage.
Accompanying drawing explanation
Fig. 1 is the 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 first steam valve or the structural representation of the second steam valve.
Fig. 5 is the A-A portion sectional view of Fig. 4.
Fig. 6 is the structural representation of steam processor.
Fig. 7 is the structural representation of injector.
Fig. 8 is the schematic diagram that upper and lower two tanks produces 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, before this equipment is in calender.This paper humidifying equipment includes frame, filter, upper moistening tank 2, steam processor 4 and multiple pressure control device.Upper moistening tank 2 includes casing 21 and the heat exchanger 23 being arranged in casing 21, front airduct 24, dividing plate the 27, first jet chimney the 25, second jet chimney 26.After equipment passes into industry high steam, steam passes sequentially through filter, pressure control device, heat exchanger 23, steam processor 4, pressure control device, the first jet chimney 25 or the second jet chimney 26, humidifier chamber and front airduct 24.Pressure control device includes pressure transducer and motor valve, and owing to 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 transducer, and then just can control the temperature of steam.
Non-close bottom the casing 21 of upper moistening tank 2, about 2cm place it is on the paper 8 transmitted by roll shaft bottom it during use, casing 21 is divided into two parts, the upper space of dividing plate 27 to be installation room 211 by dividing plate 27, and the position between dividing plate 27 and paper 8 is humid cabinet 212.Heat exchanger 23, front airduct the 24, first jet chimney 25 and the second jet chimney 26 are arranged in installation room 211.Front airduct 24 communicates with the paper delivery end of humid cabinet 212, and steam exhaustless in humid cabinet 212 is taken away by front airduct 24, it is prevented that remaining vapour is blown out outside case with the motion of paper, causes condensing drip in other place of paper machine.
Dividing plate 27 includes one piece of deflector 271, and this deflector 271 has the water conservancy diversion trend moving closer to paper 8 along paper delivery direction.First jet chimney 25 and the second jet chimney 26 are respectively provided with above dividing plate 27, and two the conveying direction of duct orientation and paper 8 of pipe perpendicular, first jet chimney 25 is on the paper feed end of humid cabinet 212, on first jet chimney 25, axial 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, it is preferred to parallel with paper 8 conveying direction；Second jet chimney 26 is in above the paper feed end of humid cabinet 212, and on the second jet chimney 26, axial spaced set has one to ranked second steam valve 6, the paper 8 that the injection direction of the second steam valve 6 transmits towards roll shaft, it is preferred to vertical with paper 8 conveying direction.This moistening tank has two kinds of humidification modes, and the steam that a kind of mode is the second steam valve 6 ejection moves downward and contacts with paper 8, and the method there is not requirement for the shape of humid cabinet 212, but has the disadvantage that in spray regime uneven, and vapor absorption amount is few；Another kind of method is that the first steam valve 5 sprays the steam with initial kinetic energy and guides forward and downwards flowing along deflector 271, partial points spray can also be carried out as desired by the second steam valve 6 and strengthen the humidification degree of paper 8 corresponding to this point, the control of the second steam valve 6 can pass through coroner's manual operations, it is also possible to by PIC controller auto-control.Many employings the second humidification mode time actually used, because steam contacts soft, uniform, scalable with paper 8 in the second way, but, in second method, the shape of deflector 271, temperature are all need to limit, the shape relation of deflector 271 trend of steam, thus affecting the effect of humidification；Deflector 271 temperature is then relevant with the formation of condensed water, if the temperature of deflector 271 is too low, steam is in that when deflector 271 contacts can produce condensed water, and condensed water is low affects humidifying process to paper 8.
First steam valve 5 and the shape of the second steam valve 6, structure are identical, all include hollow valve body 51, nozzle 52 and valve rod 53；Hollow valve body 51 two ends welded seal is on the first jet chimney 25 or the second jet chimney 26, and hollow valve body 51 side is 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 and valve rod to install passage 512 by valve port 54, 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 thread is located in the installation passage 512 of hollow valve body 51, the inner import after valve port 54 with breather line 511 of valve rod 53 offsets, in the exposed jet chimney in the inner of valve rod 53.During use, by valve rod 53 is outwards screwed out, sprayed by nozzle 52 after the import of steam entrance breather line 511；Due to valve rod 53 inner this with regard to exposed in jet chimney, it is preheated by the steam in jet chimney, therefore steam will not be met cold on its surface when valve rod 53 unclamps after, condensation, solves steam and passes through valve and meet a difficult problem for cold formation condensed water between nozzle.It should be noted that the valve port 54 on the second steam valve 6 must bottom the interior sidewall surface of the second jet chimney 26 on, in any case because regulation and control, the interior sidewall surface of the second jet chimney 26 there will certainly be condensed water, these condensed waters can be gathered in the bottom of the second jet chimney 26, if not having valve port 54, these condensed waters can pass through the second steam valve 6 and be ejected on paper 8, and the first steam valve 5 is owing to being horizontal positioned, it does not have this technical problem.
Heat exchanger 23 has optional two kinds of structures: the first structure, heat exchanger 23 includes the back-shaped pipeline 231 of heat exchange, multi-disc fin 232(accompanying drawing 2 represents with longitudinal lines vertical with 231) 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 respectively provided between adjacent two piece fin 232, thermal insulation board 233 is in above the back-shaped pipeline 231 of heat exchange, 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 fin conduction of heat, and fin is connected with dividing plate conduction of heat.If be directly connected with the back-shaped pipeline of heat exchange by dividing plate, duct bottom area is little, and contact area is little, can cause that thermal conduction effect is poor.Therefore, being located in fin be connected with dividing plate conduction of heat by the back-shaped pipeline of heat exchange, thermal conduction effect is good.The back-shaped pipeline 231 of heat exchange can be specifically divided into steam inlet tube 231a, steam goes out pipe 231b and Duo Gen steam is in charge of 231c, steam inlet tube 231a is used for passing into industry superheated steam, steam goes out the steam after pipe 231b exchanges for heat outputting, and many steam are in charge of 231c and are gone out pipe 231b for connecting steam inlet tube 231a and steam.During use, in the back-shaped pipeline of heat exchange 231 flowing high-temperature steam inlet side with go out under the poor condition of end pressure, by heat from high pressure tube wall pass be transmitted to deflector 271 by fin 232.The second structure (accompanying drawing is without this structure), the middle part of top box body is closed by dividing plate, is welded into a pressure vessel by the installation portion between dividing plate with top box body, and this container has steam inlet, steam (vapor) outlet and condensation-water drain；During use, it is possible to being added 0.12MPa low-pressure low-temperature steam directly with dividing plate 27 heat exchange by steam inlet in container, steam cooling is discharged by condensation-water drain after becoming condensed water；Can also be by 0.6MPa industry superheated steam and 80 ~ 100 DEG C of condensation water smoke mixing in container, make the Low Temperature Steam that pressure is 0.3MPa, use by supplying first jet chimney the 25, second jet chimney 26 after steam (vapor) outlet, steam processor 4, and steam is controlled into further 0.12MPa steam simultaneously heat 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 upper moistening tank 2 be arranged below one identical with its shape, structure, lower moistening tank 3 in opposite direction, the difference of upper moistening tank 2 and lower moistening tank 3 essentially consists 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 bottom frame, namely goes up moistening tank 2 and is separately positioned on, with lower moistening tank 3, paper about 8 both sides that roll shaft transmits.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 end, the outfan of lift cylinders 111 is connected to the lower end of lifting base plate 112, being hinged between the upper lower beam of lifting support 113, lift cylinders 111 drives lifting base plate 112 to move up and down.When actually used, restriction due to the front operation of paper machine, processing for paper 8 is concentrated mainly on the front of paper 8, therefore this equipment mainly uses moistening tank 2 in producing, and can individually put into production by above moistening tank 2, but requires to be in that paper machine copy paper speed is slower, less than 200 ms/min, and the wettability power of paper 8 own is relatively strong, paper 8 is not high for the smoothness requirements of reverse side, such as the facing paper outside furniture.And if paper machine copy paper speed, more than 200 ms/min or paper kind requires amount of humidification big or paper 8 is when preceding working procedure applying glue is not easily humidified or requires to control paper 8 smoothness for two sides difference is little, paper 8 is quantitatively high paper kind, double; two case is needed to produce, this at present moistening tank 3 raised by lifting pedestal and offset with upper moistening tank 2, upper and lower two casees closing seams, are humidified simultaneously.It is to be noted, although upper moistening tank 2 and the internal structure of lower moistening tank 3, principle are all identical, but lower moistening tank 3 is only as the auxiliary of upper moistening tank 2, moistening tank 3 can not be individually descended to produce, it reason for this is that: described in background technology, for guaranteeing the smooth and not wear equipment that paper 8 is carried, the width of paper 8 must be less than the width of humid cabinet 212, say, that space is left in the both sides of paper 8 width (being namely transversely to the conveying direction).And the nozzle of lower moistening tank 3 is in the lower section of paper 8, the characteristic of steam is toward floating, and the gas flow of floating steam is uncontrollable, when single nowel produces, steam can slip out from the space of paper 8 width both sides, causes that moisturization effect is poor, it is uneven to be humidified.Therefore, although the nozzle of lower moistening tank 3 is in the lower section of paper 8, it is absent from water droplet and comes off the phenomenon on paper 8, but its moisturization effect is poor, uneven.When producing for not excessive upper and lower two casees, upper and lower two casees closing seams, the steam in nowel will not slip out, and by the water conservancy diversion shape of upper and lower two casees deflectors 271, steam can be completely covered full size 8, and moisturization effect is very good simultaneously.
Steam processor 4 includes air inlet pipe 41, miscellaneous QI tank 42,43, two pure qi (oxygen) tanks 44 of drainage pipeline and two outlet pipes 45.Miscellaneous QI tank 42 goes out pipe 231b by the steam of air inlet pipe 41 with heat exchanger 23 and is connected, it is internal that air inlet pipe 41 gos deep into miscellaneous QI tank 42, the lower end of air inlet pipe 41 is provided with diverter 46, this diverter 46 includes supervisor 461 and four looped pipelines 462, four looped pipeline 462 rules are arranged on supervisor's 461 peripheries, and the lower surface of supervisor 461 is lower than the lower surface of looped pipeline 462.Being communicated by gas tank passage 421 and reflux line 422 between two pure qi (oxygen) tanks 44 and miscellaneous QI tank 42, the upper end of reflux line 422 connects the bottom of pure qi (oxygen) tank 44, and gas tank passage 421 is in reflux line 422 and the top of diverter 46；The sieve plate 423 filtering dust, rust it is additionally provided with in miscellaneous QI tank 42 between gas tank passage 421 and diverter 46.The bottom of two outlet pipes 45 is connected to the upper end of two pure qi (oxygen) tanks 44, two pure qi (oxygen) tanks 44 connect the first jet chimney 25 and the second jet chimney 26 respectively by outlet pipe 45, two pure qi (oxygen) tanks 44 are also associated with thermometer and Pressure gauge for measuring temperature and air pressure.Drainage pipeline 43 is in below miscellaneous QI tank 42, and drainage pipeline 43 is provided with drain valve.
During use, the inside toward miscellaneous QI tank 42 passes into boiling water, and the boiling water water surface is between diverter supervisor lower end outlet and the outlet of looped pipeline lower end, and namely the boiling water water surface needs do not have diverter supervisor to give vent to anger, and does not have diverter looped pipeline to give vent to anger.Steam in the back-shaped pipeline 231 of heat exchange is entered in miscellaneous QI tank 42 by air inlet pipe 41, and owing to the impurity such as dust, rust is heavier, major part impurity can pass through to be responsible for precipitation in 461 entrance boiling water, is discharged 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, by double medium filtration, in the steam of nozzle ejection almost without impurity, it is ensured that the tidiness on paper 8 surface.Simultaneously as by boiling water before the steam of pure qi (oxygen) tank 44, steam is more sufficient, it is easy to produce condensed water, reflux line 422 is used for the condensate return in pure qi (oxygen) tank 44 in miscellaneous QI tank 42.
In addition, in order to save the energy, recycle steam, the drainage pipeline 43 of steam processor 4 is connected to flash tank, the boiling water that drainage pipeline 43 is discharged enters in flash tank, injector 9 is set at the steam inlet place of heat exchange back-shaped pipeline 231, by injector 9 by the Steam Recovery of boiling water conversion in flash tank to the back-shaped pipeline 231 of heat exchange.Specifically injector 9 includes 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 passes into steam, steam at high flowing produces low pressure, is incorporated in hollow body 91 from injection bar 92 by the steam in flash tank.
The paper 8 surface compact degree and the printing effect that are produced by above paper 8 humidifying equipment are all increased substantially, and solve planarization problem, prevent warpage.Its concrete step is as follows:
1) ventilation, passes into industry 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 the bulky grain rust in industry superheated steam, dust-filtering to be fallen；
3) blood pressure lowering, reduces to the constant pressure steam of 0.4 ~ 0.45MPa by pressure transducer and motor valve by the industrial superheated steam after filtration；
4) heat exchange, the constant pressure steam of 0.4 ~ 0.45MPa passes in heat exchanger 23, heat exchanger 23 structure selects the first structure mentioned in the application, in the back-shaped pipeline of heat exchange 231 flowing 0.4 ~ 0.45MPa constant pressure steam inlet side with go out under the poor condition of end pressure, heat is passed from high pressure tube wall and is transmitted to deflector 271 by fin 232, it is ensured 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 processor 4, successively by diverter, sieve plate filter small particles rust, dust in steam processor 4, in boiling water in passing into steam processor, gas floats after boiling water, entering in pure qi (oxygen) tank by gas tank passage, after carrying out the test of temperature and air pressure in pure qi (oxygen) tank, the constant steam with 150 ~ 155 DEG C exports；
6) blood pressure lowering, the air pressure dropped by steam by pressure transducer and motor valve is between 0.3 ~ 0.35MPa, and temperature is at about 130 DEG C；
7) injection, 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 in the enterprising circulation of qi promoting state of paper fibre；
8) molding, paper 8 is batched by reel machine by calander nip with 55 DEG C of paper Wen Zaicong outlet becomes finished product.
Realize this goal of the invention, in above-mentioned steps, the core of most critical is in that to realize steam and is converted into aqueous water on page and is absorbed by paper fibre, this requires that page self-temperature before contacting with steam is relatively low on the one hand, heat exchange is produced with steam when contacting, the temperature difference is more big, and the aqueous water that paper fibre absorbs is more many；On the other hand because when high temperature super heated steam is directly with paper fibre effect, paper fibre cannot absorb amount of heat, and steam cannot be converted into liquid on fiber, so industrial high temperature superheated steam must be carried out cooling become Low Temperature Steam use.
Claims (8)
1. the paper humidifying equipment on a paper machine, it is characterized in that: include moistening tank, on this, moistening tank includes casing and the heat exchanger, dividing plate and the jet chimney that are arranged in casing, heat exchanger is provided with steam inlet and steam (vapor) outlet, and jet chimney communicates with the steam (vapor) outlet on heat exchanger；Described casing is in above the paper 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；Described heat exchanger and jet chimney are arranged in installation room, and jet chimney is provided with steam valve, and the nozzle on steam valve is in humid cabinet；Described heat exchanger includes 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 wears on a heat sink back and forth, multi-disc thermal insulation board is respectively provided between adjacent two piece fin, and thermal insulation board is in above the back-shaped pipeline of heat exchange；The back-shaped pipeline of described heat exchange is connected with fin conduction of heat, and fin is connected with dividing plate conduction of heat.
2. the paper humidifying equipment on a kind of paper machine according to claim 1, it is characterised in that: steam valve includes the hollow valve body that two ends are fixed on jet chimney, is connected to the nozzle on hollow valve body end and is located in the valve rod of hollow body；Described hollow valve body is provided with the valve port being in jet chimney, and the inner passage of hollow valve body is divided into breather line and valve rod to install passage by valve port；Nozzle communicates with the breather line of hollow valve body, and valve rod is located in the valve rod of hollow valve body and installs in passage, and the import of the inner traverse valve port of valve rod and breather line offsets, and the inner of valve rod is exposed in jet chimney.
3. the paper humidifying equipment on a kind of paper machine according to claim 2, it is characterized in that: described jet chimney at least includes the first jet chimney being arranged on humid cabinet paper feed end, the duct orientation of the first jet chimney is perpendicular with sheet transport direction, and the steam valve on the first jet chimney is the first steam valve；Described dividing plate includes deflector, and this deflector has the water conservancy diversion trend moving closer to paper along paper delivery direction, and the injection direction of the first steam valve is consistent with the water conservancy diversion trend of this deflector.
4. the paper humidifying equipment on a kind of paper machine according to claim 3, it is characterized in that: described jet chimney also includes the second jet chimney being arranged on above humid cabinet, the duct orientation of the second jet chimney is perpendicular with sheet transport direction, steam valve on second jet chimney is the second steam valve, the paper that the injection direction of the second steam valve transmits towards roll shaft.
5. the paper humidifying equipment on a kind of paper machine according to claim 4, it is characterised in that: the valve port of the second steam valve is on the bottom surface, medial wall of the second jet chimney.
6. the paper humidifying equipment on a kind of paper machine according to claim 1, it is characterized in that: between the back-shaped pipeline of heat exchange and jet chimney, be connected to steam processor, steam processor includes the air inlet pipe, miscellaneous QI tank, gas tank passage, pure qi (oxygen) tank and the escape pipe that are sequentially connected with, miscellaneous QI tank is connected with the outlet of heat exchanger by air inlet pipe, and pure qi (oxygen) tank is communicated with jet chimney by escape pipe；Described air inlet pipe stretches into inside miscellaneous QI tank, and the lower end of air inlet pipe is provided with diverter, and gas tank passage is in the top of diverter；This diverter includes 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 the lower end of looped pipeline.
7. the paper humidifying equipment on a kind of paper machine according to claim 6, it is characterised in that: being provided with the sieve plate filtering dust, rust in miscellaneous QI tank, sieve plate is between gas tank passage and diverter.
8. the paper humidifying equipment on a kind of paper machine according to claim 1, it is characterized in that: this paper humidifying equipment also includes lifting pedestal, lifting pedestal is provided with identical with upper moistening tank shape and structure, lower moistening tank in opposite direction, this lower moistening tank and upper moistening tank are oppositely arranged the upper and lower both sides of paper in roll shaft transmission.
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| CN201410195689.8A CN103938483B (en) | 2014-05-09 | 2014-05-09 | A kind of paper humidifying equipment on paper machine |
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| CN201410195689.8A CN103938483B (en) | 2014-05-09 | 2014-05-09 | A kind of paper humidifying equipment on paper machine |
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| CN103938483A CN103938483A (en) | 2014-07-23 |
| CN103938483B true CN103938483B (en) | 2016-06-29 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104153237B (en) * | 2014-08-07 | 2016-03-23 | 浙江汉普新材料技术有限公司 | The paper humidifying equipment that a kind of steam separating degree is high |
| CN113668289B (en) * | 2021-08-31 | 2023-05-02 | 广东理文造纸有限公司 | System and process for drying anti-curl paper by separating cylinders and layering and steaming after gluing |
| CN113969515B (en) * | 2021-10-25 | 2023-07-11 | 浙江华章科技有限公司 | Partition steam humidification system of intelligent paper machine and control method |
| CN113981730B (en) * | 2021-10-25 | 2023-07-11 | 浙江华章科技有限公司 | Partition steam humidifying device of intelligent paper machine |
| CN114197241B (en) * | 2021-11-22 | 2023-07-14 | 浙江华章科技有限公司 | Paper machine humidifier with condensation water prevention heat preservation nozzle |
| CN114197240B (en) * | 2021-11-22 | 2023-07-14 | 浙江华章科技有限公司 | Paperboard steam humidifying device capable of avoiding plasticizing burst of paper and using method thereof |
| CN114182567B (en) * | 2021-11-22 | 2023-07-11 | 浙江华章科技有限公司 | Partition steam humidifying equipment capable of accurately controlling temperature and pressure and application method thereof |
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