CN105506662B

CN105506662B - A kind of heat-exchange method of steel strip surface pretreatment system

Info

Publication number: CN105506662B
Application number: CN201510928610.2A
Authority: CN
Inventors: 龚立品; 圣祥; 王道路
Original assignee: Anhui Chujiang Special Steel Co Ltd
Current assignee: Anhui Chujiang Special Steel Co Ltd
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2018-12-04
Anticipated expiration: 2035-12-15
Also published as: CN105506662A

Abstract

The invention discloses a kind of heat-exchange methods of steel strip surface pretreatment system, belong to steel band pickling technical field, comprising the following steps: one, by pickling system pickling solution be discharged；Two, steam is filled with into the capillary inside heater body；Three, the pickling solution of discharge is sent into heater body and is heated, specially the pickling solution deposited in sour pond is pumped into heater body, pickling solution gradually rises the temperature of pickling solution to be gradually heated up by the high-temperature steam inside capillary from the extracapillary effluent mistake full of high-temperature steam；Four, the pickling solution after heating is flowed back into steel band pickling system.According to the technical solution of the present invention can be to avoid generating a large amount of steam in pickling tube, and the leakage and waste of pickling solution can be prevented, save production cost.

Description

A kind of heat-exchange method of steel strip surface pretreatment system

Technical field

The present invention relates to steel band processing technique fields, more specifically to a kind of changing for steel strip surface pretreatment system Hot method.

Background technique

Steel band is easy to happen oxidation in wet environment, and there is one layer of thicker oxide skin on surface, its finished product is caused to change colour It is more obvious, the quality and beauty of strip product are seriously affected, therefore steel band is typically necessary elder generation before entering cold rolling process Surface preparation is carried out, the oxide skin of removal steel strip surface attachment, current widely used pretreatment mode is at pickling Reason, the main purpose of pickling are effective impurity for removing steel strip surface.If steel band pickling is not thorough, system is on the one hand directly resulted in Impurity is pressed into steel strip surface during work, influences the quality of cold-rolled products；On the other hand coarse to the roll of lower road cold rolling process Degree and emulsion service life adversely affect.Therefore the preceding working procedure as cold rolling, pickling processes process are most important.

The pickling pretreatment of steel band is usually that steel band first passes through pickling tube pickling and then passes through washing and brushing device in the prior art It is scrubbed, brushes away the impurity of steel strip surface, then cleaned by service sink, however during pickling tube continuous acid-washing, it needs So that pickling solution is kept certain temperature, pickling solution is directly being carried out to be easy to make pickling line to generate a large amount of steam in heating process Acid mist etc., and acid mist is easy to spread into air, makes surrounding enviroment and equipment by different degrees of corrosion, along with technology It constantly promotes and the continuous enhancing of environmental consciousness, the heat exchange mode of steel band pickling line is badly in need of being further improved.

About the pretreated technological improvement of steel strip surface, has related patents in the prior art and disclose, such as Chinese patent Application number: 2013205907586, the applying date is on September 24th, 2013, invention and created name are as follows: a kind of steel band derusting pickling line, This application is related to a kind of steel band derusting pickling line, including descaling bath and Rinsing Area, be equipped with above descaling bath acid fog absorption tower and The stone roll slot cover of corresponding stone roll, top is equipped with excessive acid tank cover, excessive acid tank cover and stone roll slot cover between descaling bath and Rinsing Area Junction, stone roll slot cover and acid fog absorption tower junction are equipped with groove, and clear water is marked in groove, and this application passes through water Acid mist is enclosed in descaling bath by envelope, thus so that acid mist is leaked outside, but this application can only reduce acid mist leaking into air, The generation of acid mist cannot be reduced from source, and can not solve that pickling solution caused by pickling solution is evaporate into groove wastes asks Topic, requires further improvement.

Summary of the invention

Technical problems to be solved by the inivention

The present invention is easy to produce the deficiency of a large amount of acid mists for acid solution heating in pickling system in the prior art, provides one The heat-exchange method of kind steel strip surface pretreatment system, can effectively reduce the generation of acid mist, and avoid the waste of pickling solution, thus Production cost is reduced, pickling environment is improved.

Technical solution

In order to achieve the above objectives, technical solution provided by the invention are as follows:

A kind of heat-exchange method of steel strip surface pretreatment system of the invention, comprising the following steps:

Step 1: the pickling solution in pickling system is discharged；

The acid tube on pickling tube is opened, the pickling solution in pickling system is discharged to and is deposited in sour pond, is waited to be heated；

Wherein the pickling system is a part of steel strip surface pretreatment system, the steel strip surface pretreatment system packet The system of peeling off, pickling system and circulating heater are included, the system of peeling off includes the decorticator set gradually, dry brushing machine, biography Roller and storage disk are sent, the decorticator includes maxilla roller mechanism and lower jaw roller mechanism, maxilla roller mechanism and the one of lower jaw roller mechanism End is hinged, and intersects on lower jaw roller mechanism and maxilla roller mechanism and is equipped with shelling roll；

The dry brushing machine includes upper brush roll, lower brush roll, rotating disk body, first hydraulic cylinder and second hydraulic cylinder, upper brush roll and Parallelly distribute on, the both ends of upper brush roll and lower brush roll are separately fixed on two rotating disk bodies lower brush roll up and down, first hydraulic cylinder and Second hydraulic cylinder is hinged on the two sides of one of rotating disk body；Transfer roller includes two pressure rollers of about two parallelly distribute ons, Steel band is introduced into storage disk after being pierced by between two pressure rollers；Steel band enters pickling system after being pierced by from storage disk；

The pickling system include the guide roller set gradually from left to right, support roller, pressure roller I, descaling bath, pressure roller II, Rinsing Area, pressure roller III and drying air knife, the pressure roller I and pressure roller II are separately positioned on the entrance and exit position of descaling bath, pressure Roller III is arranged above Rinsing Area, and the exit of Rinsing Area is additionally provided with drying air knife；

The descaling bath includes more than two pickling tubes, and the lower part of adjacent pickling tube is connected, outside pickling tube side wall Side is provided with sealing structure, including the sealing side wall being fixedly connected with pickling tube side wall, the sealing side wall and pickling tube side wall it Between the groove that is formed be water sealed tank；Acid tank cover is stamped above each pickling tube；

The circulating heater is arranged in the side of descaling bath, including acid tube, deposits sour pond, heater body and into acid Pipe, one end of the acid tube are connected with pickling tube, and the other end of acid tube is connected with sour pond is deposited, the heater body On be provided with acid extracting pipe road and be connected with sour pond is deposited, kinetic pump, one end of the acid inlet tube and pickling are provided on acid extracting pipe road Pond is connected, and the other end and heater body of acid inlet tube are connected, and heater body is internally provided with capillary；

Step 2: steam is filled with into the capillary inside heater body；

Step 3: the pickling solution of discharge is sent into heater body and is heated；

After step 2, the pickling solution deposited in sour pond is flowed in heater body through acid extracting pipe road by kinetic pump, Pickling solution gradually rises from the extracapillary effluent mistake for being full of steam, the temperature of pickling solution；

Step 4: the pickling solution after heating is flowed back into steel band pickling system；

After step 3, the pickling solution being heated is flowed back into pickling system by the acid inlet tube on pickling tube, pickling The heat transfer process of system terminates.

Further, the acid tank cover includes inner wall, outer wall, upper cover and deflector, and inner wall is located at below upper cover, and is connected In the surrounding position of upper cover, inner wall and upper cover form a hollow cavity, and inner wall is placed in above-mentioned water sealed tank；Outer wall is set It sets in the outside of inner wall, and is in contact with the upper surface of sealing side wall；The medial surface of upper cover is also fixed with deflector along surrounding, institute The inside that deflector is located at inner wall is stated, and deflector is tilted to upper cover centre, so that deflector and pickling tube side wall is interior Side is in contact, and the angle between deflector and pickling tube side wall is α, and α is acute angle.

Further, the acid tank cover further includes stiffening plate, and wherein upper cover is arcuate structure, and the stiffening plate is arranged upper The center of lid medial surface, and the both ends of stiffening plate are fixedly connected with deflector respectively.

Further, the explosionproof hole through its thickness is offered on the upper lid.

Further, the size of the angle α is 15 ~ 30 °.

Further, it is additionally provided with acid mist purifying device above the descaling bath, is disposed in the acid mist purifying device Cooling zone, a neutral zone, secondary neutral zone and demister device.

Further, squeeze roller is additionally provided between the descaling bath and Rinsing Area.

Beneficial effect

Using technical solution provided by the invention, compared with prior art, there is following remarkable result:

(1) present invention realizes heat exchange by circulating heater, the circulating heater include acid tube, deposit sour pond, One end of heater body and acid inlet tube, acid tube is connected with pickling tube, and the other end is connected with sour pond is deposited, heater body On be provided with acid extracting pipe road and be connected with sour pond is deposited, one end of acid inlet tube is connected with pickling tube, the other end of acid inlet tube with plus Hot device ontology is connected, and heater body is internally provided with a large amount of capillaries；Heater body also with the boiler room phase of workshop High temperature hot steam is constantly delivered in the capillary in heater body by connection, boiler room, so that there is greatly circulation in capillary High-temperature steam is measured, when the pickling solution of pickling tube deposits sour pond when the temperature drops, opening acid tube and being discharged into the pickling solution in pickling tube In, then the acid extracting pipe road in heater body is driven by kinetic pump, and the pickling solution deposited in sour pond is pumped into heater body In, pickling solution is slowly flowed through from the lateral surface of a large amount of capillaries, to be gradually heated up by the high-temperature steam inside capillary, is added Pickling solution after heat passes through acid inlet tube again and flows back into pickling tube, and the pickling solution temperature of pickling tube is finally made constantly to increase, Hot steam is avoided by the way of this slot external circulation heating and enters directly into pickling tube, so as to avoid pressure in pickling tube Constantly rise, pickling solution is also easier to the problem of evaporation leaks.

(2) pickling tube side-wall outer side is provided with sealing structure in the present invention, including the sealing being fixedly connected with pickling tube side wall Side wall, sealing the groove formed between side wall and pickling tube side wall is water sealed tank, the injected clear water in the water sealed tank, each pickling Acid tank cover is stamped above pond, and the inner wall of acid tank cover is placed in water sealed tank, the clear water in water sealed tank will be inside pickling tube It is fully sealed with the external world, the pickling solution inside pickling tube can be effectively prevent, to external diffusion, to avoid pickling solution due to by thermal evaporation To the pollution with external environment.

(3) deflector is provided in the present invention on upper lid, and deflector is tilted to upper cover centre, and acid tank cover is placed When above pickling tube, inner wall is located in water sealed tank, and deflector is in contact on the inside of pickling tube side wall just, i.e., by pickling Obstructed completely between pond side wall and water sealed tank, after acid mist liquefaction when flowing back along upper cover, can because the blocking of deflector and can not Into water sealed tank, so that the smooth surface along deflector all flows back into pickling tube, the expansion of pickling solution is further avoided It dissipates and wastes.

Detailed description of the invention

Fig. 1 is the pickling system structural schematic diagram in the present invention；

Fig. 2 is the pickling tube structural schematic diagram in the present invention.

Label declaration in schematic diagram: 1, guide roller；2, support roller；3, pressure roller I；4, acid tank cover；5, descaling bath；6, pressure roller Ⅱ；7, pressure roller III；8, Rinsing Area；9, drying air knife；401, inner wall；402, outer wall；403, upper cover；404, deflector；405, add Strong plate；501, pickling tube；502, water sealed tank；503, pickling tube side wall；504, side wall is sealed.

Specific embodiment

To further appreciate that the contents of the present invention, the present invention is described in detail with reference to the accompanying drawings and examples.

Embodiment 1

As depicted in figs. 1 and 2, one of the present embodiment steel strip surface pretreatment system includes the system, pickling system of peeling off System and circulating heater are peeled off wherein the system of peeling off includes the decorticator set gradually, dry brushing machine, transfer roller and storage disk Machine includes maxilla roller mechanism and lower jaw roller mechanism, and maxilla roller mechanism and one end of lower jaw roller mechanism are hinged, lower jaw roller mechanism and Intersect on maxilla roller mechanism and is equipped with shelling roll；Steel band is passed through between the shelling roll of top-bottom cross, and shelling roll causes anti-steel band Multiple bending, so that the oxide skin on its surface is largely peeled off or be shelled pine.

Decorticator rear is additionally provided with dry brushing machine, and dry brushing machine includes upper brush roll, lower brush roll, rotating disk body, first hydraulic cylinder And second hydraulic cylinder, upper brush roll and lower brush roll parallelly distribute on up and down, the both ends of upper brush roll and lower brush roll are separately fixed at two and turn On Moving plate body, first hydraulic cylinder and second hydraulic cylinder are hinged on the two sides of one of rotating disk body；Steel band is peeled off through decorticator Afterwards, surface still has oxide skin residual fine crushing, which is difficult to remove by shelling roll, upper brush roll and lower brush roll Roll surface then more fine brush can be carried out to steel strip surface and sweep grinding, further remove remaining oxide skin, avoid steel band It brings oxide skin into pickling system together, can effectively reduce the usage amount of pickling solution in subsequent pickling process, to reduce production Cost.It is worth noting that the first hydraulic cylinder and second hydraulic cylinder that are arranged in dry brushing machine can drive rotating disk body to rotate, i.e., Brush roll and lower brush roll are with the whole deflection of rotating disk body progress in drive, so that the vertical interval between upper brush roll and lower brush roll becomes It is small, to avoid the defect that can not touch steel band due to brush roll surface abrasion, effectively increase brush roll and lower brush roll Service life.

Transfer roller includes two pressure rollers of about two parallelly distribute ons, and steel band is introduced into storage after being pierced by between two pressure rollers Deposit；Steel band enters pickling system after being pierced by from storage disk, and the design of the storage disk is very important, and stores and first stores in disk Steel band is sent into pickling system again by part steel band, when needing to carry out the welding replacement between different coil bands in the system of peeling off, The long period may be occupied, storing the steel band in disk can continue to export to pickling system at this time, will not influence pickling system Normal production efficiency.

Pickling system include the guide roller 1 set gradually from left to right, support roller 2, pressure roller I 3, descaling bath 5, pressure roller II 6, Rinsing Area 8, pressure roller III 7 and drying air knife 9, steel band are passed through between the up-down rollers of guide roller 1, are effectively prevented steel band and are traveled across Occur moving up and down phenomenon in journey, it can be further to the height of steel band with the direction of travel of stabilized steel band and position, support roller 2 It is adjusted；Pressure roller I 3 and pressure roller II 6 are separately positioned on the entrance and exit position of descaling bath 5, pressure roller I 3 and pressure roller II 6 for steel It is real so that steel band is acid washed liquid always in continuous forward movement and is completely soaked in the pickling solution in indentation descaling bath 5 Existing acid cleaning process；Pressure roller III 7 is arranged above Rinsing Area 8, and steel band is pressed into the clear water in Rinsing Area 8 by pressure roller III 7, so that steel Band surface in continuous forward movement is impregnated by clear water always, so that the remaining pickling solution of steel strip surface is cleaned, The exit of Rinsing Area 8 is also disposed with squeeze roller and drying air knife 9, first extracts the remaining moisture of steel strip surface and carries out again Purging further removes surface acid washing lotion；Pickling solution is brought into Rinsing Area 8 to reduce steel band, the exit of descaling bath 5 is also set It is equipped with squeeze roller and blow-dry device.

For the pickling effect for optimizing steel band, the steel band that surface quality is higher, more bright is obtained, inventor is to the acid used Washing lotion is also synchronized and is optimized, the present invention used in pickling solution consist of the following compositions: hydrochloric acid, mass percent be 10 ~ 20%；Hydrofluoric acid, mass percent are 5 ~ 8%；Iron chloride, mass percent are 6 ~ 10%；Sldium lauryl sulfate, mass percent It is 0.5 ~ 1.5%；Calgon, mass percent are 0.1 ~ 0.8%, remaining is water.Specifically in the present embodiment, hydrochloric acid quality Percentage is 10%, and hydrofluoric acid mass percent is 5%, and iron chloride mass percent is 6%, sldium lauryl sulfate mass percent It is 0.5%, calgon mass percent is 0.1%；Sldium lauryl sulfate can effectively increase the activity of pickling solution, promote with The oxide skin of steel strip surface occurs hair and answers, and accelerates pickling speed, improves pickling efficiency；Calgon, which helps to remove, to be rested on Greasy dirt, oxidation and the unoxidized surface impurity of steel strip surface, improve cleaning, the glossiness of steel strip surface, while in pickling solution The chloride ion of introducing helps to slow down the fast reaction of steel band and pickling solution, avoids overpickling that steel strip substrate is caused to occur rotten Erosion, and effectively inhibit the generation of acid mist, the service life of pickling solution can be extended.

More than two pickling tubes 501 is provided in descaling bath 5, the lower part of adjacent pickling tube 501 is connected, and steel band is It is to be passed through in pickling tube 501, sealing structure is provided on the outside of pickling tube side wall 503, including is solid with 503 phase of pickling tube side wall Sealing side wall 504 even, sealing the groove formed between side wall 504 and pickling tube side wall 503 is water sealed tank 502, in the water seal 501 inside of pickling tube is fully sealed with the external world for injected clear water in slot 502, the clear water in water sealed tank 502, can effectively prevent acid Pickling solution inside wash pool 501, to external diffusion, avoids pollution of the pickling solution pair with external environment due to heated volatilization；Each acid It is stamped acid tank cover 4 in 501 top of wash pool.

Acid tank cover 4 includes inner wall 401, outer wall 402, upper cover 403 and deflector 404, and inner wall 401 is located at 403 lower section of upper cover, And it is connected in the surrounding position of upper cover 403, inner wall 401 and upper cover 403 form a hollow cavity, in order to reduce pickling to the greatest extent The height of heat diffusion in pond 501, the small volume of the hollow cavity, upper cover 403 is lower；Inner wall 401 is placed on water seal In slot 502；The outside of inner wall 401 is arranged in outer wall 402, and is in contact with the upper surface of sealing side wall 504, thus by water sealed tank 502 are isolated from the outside world, and prevent from having a small amount of acid mist in water sealed tank 502 and leak；The medial surface of upper cover 403 is also fixed with along surrounding leads Flowing plate 404, deflector 404 is located at the inside of inner wall 401, and deflector 404 is tilted to 403 centre of upper cover, so that water conservancy diversion Plate 404 is in contact with the inside of pickling tube side wall 503, and the design of the deflector 404 is to further prevent letting out for pickling solution Leakage is wasted with evaporation.

When pickling pickling solution because temperature influence will form acid mist, acid mist is gathered and can be liquefied again below upper cover 403, along The medial surface of upper cover 403 flows back into pickling tube 501, and upper cover 403 is arcuate structure, is more advantageous to the reflux of pickling solution；But skill Art personnel have found that the part pickling solution after liquefaction can finally flow back into water sealed tank 502 along upper cover 403 during long-term production In, gradually the clear water in water sealed tank 502 is acidified, the wasting of resources of pickling solution is also resulted in, improves production cost；To avoid This phenomenon, technical staff are creatively added to the design of deflector 404, which is arranged in the inside of inner wall 401, and Deflector 404 is tilted to 403 centre of upper cover, and when acid tank cover 4 is covered above pickling tube 501, inner wall 401 is located at water sealed tank In 502, and deflector 404 is in contact with the inside of pickling tube side wall 503 just, i.e., by pickling tube side wall 503 and water sealed tank 502 Between obstruct completely, acid mist liquefaction after along upper cover 403 flow back when, can because deflector 404 blocking and cannot be introduced into water seal Slot 502 avoids diffusion and the wave of pickling solution so that the smooth surface along deflector 404 all flows back into pickling tube 501 Take.Angle between the deflector 404 and pickling tube side wall 503 is that α (is specifically deflector 404 and longitudinal vertical line in Fig. 2 Between angle be α, the longitudinal direction vertical line is parallel with pickling tube side wall 503), the effect that the size of α flows back for pickling solution Tool has a certain impact, if α is excessive, will lead to excessive by resistance and speed is excessively slow in pickling solution reflux, if α is too small and is unfavorable for The cooperation of entire acid tank cover 4 and pickling tube 501 leads to cover being limited with the movement opened；Technical staff is by continuous experiment Grope, finally found that when α is 15 ~ 30 ° most useful for production and application, neither influence the back-flow velocity of pickling solution, is also conducive to entire The cooperation of acid tank cover 4 and pickling tube 501, specifically α is 15 ° in the present embodiment.

For the structural strength for reinforcing acid tank cover 4, in the center of 403 medial surface of the upper cover setting stiffening plate 405, and add The both ends of strong plate 405 are fixedly connected with deflector 404 respectively.The explosionproof hole through its thickness is offered in upper cover 403, steel band is in acid A small amount of hydrogen may be displaced because there is chemical reaction during washing, hydrogen is assembled in pickling tube 501 excessively to be then easy to lead Cause safety accident, in order to improve production security, technical staff has opened up explosionproof hole in upper cover 403, the explosion-proof pore size compared with It is small, the hydrogen of generation can be discharged at any time, and not will lead to a lot of leakage of acid mist.

It is additionally provided with acid mist purifying device above descaling bath 5, cooling zone, primary neutralization are disposed in acid mist purifying device Area, secondary neutral zone and demister device, the present invention in be provided with two groups of acid mist purifying devices altogether, respectively in the entrance of descaling bath 5 And outlet port, the acid mist of entrance first pass around cooling zone and liquefy, then pass through a neutral zone and secondary neutral zone respectively Acid-base neutralization is carried out, is finally filtered by demister, clean gas is discharged.

A kind of heat-exchange method of steel strip surface pretreatment system of the present embodiment is realized by circulating heater, The circulating heater is arranged in the side of descaling bath 5, including acid tube, deposits sour pond, heater body and acid inlet tube, acid tube One end be connected with pickling tube 501, the other end of acid tube is connected with sour pond is deposited, and acid extracting pipe is provided in heater body Road is connected with sour pond is deposited, and kinetic pump is provided on acid extracting pipe road, and one end of acid inlet tube is connected with pickling tube 501, acid inlet tube The other end and heater body be connected, heater body is internally provided with a large amount of capillaries；Heater body also with production vehicle Between boiler room be connected；The specific heat exchange step of the present embodiment is as follows:

Step 1: the pickling solution in pickling system is discharged；

The acid tube on pickling tube (501) is opened, the pickling solution in steel band pickling tube (501) is discharged to and is deposited in sour pond, Etc. to be heated；

Step 2: high-temperature steam is filled with into the capillary inside heater body；

After step 1, a large amount of high-temperature steams in boiler room are constantly delivered to the capillary in heater body In, so that circulation has a large amount of high-temperature steams in capillary；

After step 2, acid extracting pipe road is driven by kinetic pump, the pickling solution deposited in sour pond is pumped into heater sheet In body, pickling solution is from the numerous extracapillary effluent mistakes for being full of high-temperature steam, thus gradually by the high-temperature steam inside capillary Heating, gradually rises the temperature of pickling solution；

After step 3, the pickling solution being heated flows back into pickling tube (501) by the acid inlet tube on pickling tube (501) In, finally make the pickling solution temperature in pickling tube 501 constantly increase, the heat transfer process of steel band pickling system terminates.Due to acid The discharge and reflux of washing lotion are that continuous circulation carries out, so having no effect on the normal traveling of steel band in heating process.Traditional Heating method, which mostly uses, is directly heated at high temperature pickling solution in pickling tube 501, and this mode can not only make entire pickling It is covered with hot steam in pond 501, pressure constantly rises, and there are requirements at the higher level to equipment material performance, also results in pickling solution itself Constantly evaporation leakage, it is also possible to because of the frequent cracking for leading to pickling tube side wall 503 heated suddenly；Technical staff is using outside slot Hydronic mode, hot steam will not be directly entered in pickling tube 501, then can effectively be solved these problems.

Embodiment 2

With embodiment 1, except that α size is 20 ° in the present embodiment, hydrochloric acid quality in the pickling solution in the present embodiment Percentage is 20%, and hydrofluoric acid mass percent is 8%, and iron chloride mass percent is 10%, sldium lauryl sulfate mass percent It is 1.5%, calgon mass percent is 0.8%, remaining is water.

Embodiment 3

With embodiment 1, except that α size is 30 ° in the present embodiment, hydrochloric acid quality in the pickling solution in the present embodiment Percentage is 15%, and hydrofluoric acid mass percent is 7%, and iron chloride mass percent is 8%, sldium lauryl sulfate mass percent It is 1.2%, calgon mass percent is 0.5%, remaining is water.

Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution Similar frame mode and embodiment, are within the scope of protection of the invention.

Claims

1. a kind of heat-exchange method of steel strip surface pretreatment system, which comprises the following steps:

Step 1: the pickling solution in pickling system is discharged；

The acid tube on pickling tube (501) is opened, the pickling solution in pickling system is discharged to and is deposited in sour pond, is waited to be heated；

Wherein the pickling system is a part of steel strip surface pretreatment system, and the steel strip surface pretreatment system includes stripping Shell systems, pickling system and circulating heater, the system of peeling off include the decorticator set gradually, dry brushing machine, transfer roller With storage disk, the decorticator includes maxilla roller mechanism and lower jaw roller mechanism, one end phase of maxilla roller mechanism and lower jaw roller mechanism Hingedly, intersect on lower jaw roller mechanism and maxilla roller mechanism equipped with shelling roll；

The dry brushing machine includes upper brush roll, lower brush roll, rotating disk body, first hydraulic cylinder and second hydraulic cylinder, upper brush roll and lower brush The both ends of parallelly distribute on above and below roller, upper brush roll and lower brush roll are separately fixed on two rotating disk bodies, first hydraulic cylinder and second Hydraulic cylinder is hinged on the two sides of one of rotating disk body；Transfer roller includes two pressure rollers of upper and lower parallelly distribute on, and steel band is from two Storage disk is introduced into after being pierced by between a pressure roller；Steel band enters pickling system after being pierced by from storage disk；

The pickling system include the guide roller (1) set gradually from left to right, support roller (2), pressure roller I (3), descaling bath (5), Pressure roller II (6), Rinsing Area (8), pressure roller III (7) and drying air knife (9), the pressure roller I (3) and pressure roller II (6) are separately positioned on The entrance and exit position of descaling bath (5), above Rinsing Area (8), the exit of Rinsing Area (8) is also set for pressure roller III (7) setting It is equipped with drying air knife (9)；

The descaling bath (5) includes more than two pickling tubes (501), and the lower part of adjacent pickling tube (501) is connected, in pickling It is provided with sealing structure on the outside of pond side wall (503), it is described including the sealing side wall (504) being fixedly connected with pickling tube side wall (503) The groove formed between sealing side wall (504) and pickling tube side wall (503) is water sealed tank (502)；Above each pickling tube (501) It is stamped acid tank cover (4)；

Circulating heater setting is in the side of descaling bath (5), including acid tube, deposits sour pond, heater body and into acid Pipe, one end of the acid tube are connected with pickling tube (501), and the other end of acid tube is connected with sour pond is deposited, the heating It is provided with acid extracting pipe road on device ontology and is connected with sour pond is deposited, acid extracting pipe is provided with kinetic pump on road；One end of the acid inlet tube It is connected with pickling tube (501), the other end and heater body of acid inlet tube are connected, and heater body is internally provided with capillary Pipe；

Step 2: steam is filled with into the capillary inside heater body；

After step 2, the pickling solution deposited in sour pond is flowed in heater body through acid extracting pipe road by kinetic pump, pickling Liquid gradually rises from the extracapillary effluent mistake for being full of steam, the temperature of pickling solution；

After step 3, the pickling solution being heated is flowed back into pickling system by the acid inlet tube on pickling tube (501), pickling The heat transfer process of system terminates；

The acid tank cover (4) includes inner wall (41), outer wall (402), upper cover (403) and deflector (404), and inner wall (401) is located at Below upper cover (403), and it is connected in the surrounding position of upper cover (403), inner wall (401) and upper cover (403) composition one are hollow Cavity, inner wall (401) are placed in above-mentioned water sealed tank (502)；Outer wall (402) be arranged in the outside of inner wall (401), and with it is close The upper surface of envelope side wall (504) is in contact；The medial surface of upper cover (403) is also fixed with deflector (404), the water conservancy diversion along surrounding Plate (404) is located at the inside of inner wall (401), and deflector (404) is tilted to upper cover (403) centre, so that deflector (404) it is in contact on the inside of pickling tube side wall (503), and the angle between deflector (404) and pickling tube side wall (503) is α, α are acute angle；The size of the angle α is 15~30 °；The explosionproof hole through its thickness is offered on the upper cover (403).

2. a kind of heat-exchange method of steel strip surface pretreatment system according to claim 1, it is characterised in that: the acid tank Covering (4) further includes stiffening plate (405), and wherein upper cover (403) is arcuate structure, and the stiffening plate (405) is arranged in upper cover (403) The center of medial surface, and the both ends of stiffening plate (405) are fixedly connected with deflector (404) respectively.

3. a kind of heat-exchange method of steel strip surface pretreatment system according to claim 1 or 2, it is characterised in that: described Acid mist purifying device is additionally provided with above descaling bath (5), be disposed in the acid mist purifying device cooling zone, a neutral zone, Secondary neutral zone and demister device.

4. a kind of heat-exchange method of steel strip surface pretreatment system according to claim 1, it is characterised in that: the pickling Squeeze roller is additionally provided between slot (5) and Rinsing Area (8).