CN105401162B

CN105401162B - A kind of steel strip surface pretreatment system with emergency stop device

Info

Publication number: CN105401162B
Application number: CN201510928591.3A
Authority: CN
Inventors: 陶军; 秦升龙; 圣祥
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: 2018-04-13
Anticipated expiration: 2035-12-15
Also published as: CN105401162A

Abstract

The invention discloses a kind of steel strip surface pretreatment system with emergency stop device, belong to steel band technical field of processing equipment.The present invention includes peel off system, pickling system and emergency stop device, and system of peeling off includes decorticator, dry brushing machine and transfer roller；Pickling system includes guide roller, support roller, pressure roller I, descaling bath, pressure roller II, Rinsing Area, pressure roller III and drying air knife；Descaling bath includes more than two pickling tubes, and the lower part of adjacent pickling tube is connected, and sealing side wall is fixed with the outside of pickling tube side wall, and it is water sealed tank to seal the groove formed between side wall and pickling tube side wall；Acid tank cover is stamped above each pickling tube；Emergency stop device is arranged on the side of descaling bath.By technical scheme it is possible to prevente effectively from being influenced caused by equipment downtime, and the leakage and waste of pickle are can effectively prevent, saved production cost.

Description

A kind of steel strip surface pretreatment system with emergency stop device

Technical field

The present invention relates to steel band technical field of processing equipment, more specifically to a kind of steel band with emergency stop device Surface preparation system.

Background technology

Steel band easily aoxidizes in wet environment, there is one layer of thicker oxide skin on its surface, causes its finished product 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 cold rolling process is entered Surface preparation is carried out, removes the oxide skin of steel strip surface attachment, current widely used pretreatment mode is at pickling Reason, the main purpose of pickling is 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 it is 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 Scrubbed, brush away the impurity of steel strip surface, then cleaned by service sink, but during pickling tube continuous acid-washing, by In a variety of causes, it is often necessary to shut down, steel band is easy to deposit in steel strip surface miscellaneous due to long in the pickling section residence time at this time Matter, this layer of surface impurity are attached to steel strip surface, and following process can cause steel band to show nigrescence or the surface defect of jaundice, sternly Ghost image rings the surface quality of steel band；The pollution problems such as a large amount of acid mists, waste liquid are easily produced in acid cleaning process at the same time, make surrounding enviroment It is pre- with the continuous continuous enhancing promoted with environmental consciousness of technology, steel strip surface and equipment is subject to different degrees of corrosion Processing unit is badly in need of further improving.

On the technological improvement of steel strip surface pretreatment, related patents disclose in the prior art, such as Chinese patent Application number：2013205907586, the applying date is September in 2013 24 days, and invention and created name is：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 capping of corresponding stone roll, top is equipped with excessive acid tank cover, excessive acid tank cover and stone roll capping between descaling bath and Rinsing Area Junction, stone roll capping and acid fog absorption tower junction are equipped with groove, and clear water is marked with groove, and this application passes through water Acid mist is enclosed in descaling bath by envelope, so that acid mist is leaked outside, but this application can only reduce acid mist leaking into air, Steel band cannot be protected in equipment downtime, and pickle caused by pickle is evaporate into groove can not be solved and wasted The problem of, it is necessary to further improve.

The content of the invention

Technical problems to be solved by the inivention

The present invention is for the readily volatilized waste of pickle in pickling system in the prior art and the easy depositing contaminants of steel strip surface Deficiency, there is provided a kind of steel strip surface pretreatment system with emergency stop device, it is possible to prevente effectively from caused by equipment downtime Influence, and reduce the waste of pickle, so as to reduce production cost, improve pickling environment.

Technical solution

To reach above-mentioned purpose, technical solution provided by the invention is：

The present invention a kind of steel strip surface pretreatment system with emergency stop device, including system of peeling off, pickling system and Emergency stop device, wherein the system of peeling off includes decorticator, dry brushing machine, transfer roller and the storage disk set gradually, it is described to peel off 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 be 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 Parallel distribution, 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 both sides of one of rotating disk body；Transfer roller includes two pressure rollers of upper and lower parallel distribution, steel band Storage disk is introduced into after being pierced by between two pressure rollers；Steel band enters pickling system after being pierced by from storage disk；

The pickling system include set gradually from left to right guide roller, 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 on 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, sealing side wall and the 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 emergency stop device is arranged on the side of descaling bath, including acid tube, deposits sour pond and acid inlet tube, acid tube and into acid The both ends of pipe are respectively with pickling tube and depositing sour pond and being connected.

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 Put in the outside of inner wall, and the upper surface with sealing side wall is in contact；The medial surface of upper cover is also fixed with deflector along surrounding, institute The inner side that deflector is located at inner wall is stated, and deflector is tilted to upper cover centre so that deflector is interior with pickling tube side wall 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 reinforcing plate, and wherein upper cover is arcuate structure, and the reinforcing plate is arranged on The center of lid medial surface, and the both ends of reinforcing 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, acid mist purifying device is additionally provided with above the descaling bath, is disposed with the acid mist purifying device Cooling zone, a neutral zone, secondary neutral zone and demister device.

Further, it is additionally provided with squeeze roller 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）The present invention is provided with emergency stop device in the side of descaling bath, including acid tube, deposits sour pond and acid inlet tube, acid discharge The both ends of pipe and acid inlet tube are respectively with pickling tube and depositing sour pond and being connected, when there is cancel closedown in equipment, opening acid tube, and general Pickle in pickling tube is discharged into deposit and is kept in sour pond, and when equipment returns to normal production, acid inlet tube passes through kinetic pump The pickle deposited in sour pond is withdrawn into pickling tube by drive, and steel band continues acid cleaning process；The device of the emergency stop device can To avoid there is steel band due to long in the pickling section residence time, in steel strip surface depositing contaminants, following process causes the steel band to be in Reveal nigrescence or the phenomenon of jaundice, be conducive to improve the surface quality of steel band.

（2）The present invention is provided with deflector on upper lid, and deflector is tilted to upper cover centre, and acid tank cover is covered When above pickling tube, inner wall is located in water sealed tank, and deflector is in contact with the inside of pickling tube side wall just, i.e., by pickling tube Obstructed completely between side wall and water sealed tank, when flowing back after acid mist liquefaction along upper cover, can because the stop of deflector and can not be into Enter water sealed tank, so as to all be flowed back into along the smooth surface of deflector in pickling tube, further avoid the diffusion of pickle With waste.

Brief description of the drawings

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

Fig. 2 is the pickling tube structure diagram in the present invention.

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

Embodiment

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

Embodiment 1

As depicted in figs. 1 and 2, a kind of steel strip surface pretreatment system with emergency stop device of the present embodiment, including stripping Shell systems, pickling system and emergency stop device, wherein system of peeling off includes decorticator, dry brushing machine, transfer roller and the storage set gradually Deposit, decorticator include maxilla roller mechanism and lower jaw roller mechanism, and maxilla roller mechanism and one end of lower jaw roller mechanism are hinged, lower jaw Intersect on roller mechanism and maxilla roller mechanism and be equipped with shelling roll；Steel band is passed through between the shelling roll of top-bottom cross, and shelling roll is to steel Band causes alternating 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 parallel distribution 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 both sides of one of rotating disk body；Steel band is peeled off through decorticator Afterwards, surface still has oxide skin residual in small, broken bits, which is difficult to remove by shelling roll, upper brush roll and lower brush roll Roll surface can then carry out more fine brush to steel strip surface and sweep grinding, further remove remaining oxide skin, avoid steel band Bring oxide skin into pickling system together, can effectively reduce the usage amount of pickle in follow-up pickling process, so as to reduce production Cost.It is worth noting that the first hydraulic cylinder and second hydraulic cylinder that are set in dry brushing machine can drive rotating disk body to rotate, i.e., Brush roll and lower brush roll are with the overall deflection of rotating disk body progress in drive so that upper vertical interval between brush roll and lower brush roll becomes It is small, so that the defects of avoiding that due to brush roll surface abrasion steel band can not be touched, effectively increase brush roll and lower brush roll Service life.

Transfer roller includes two pressure rollers of about two parallel distributions, 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 is first stored in disk Steel band is sent into pickling system by part steel band again, when needing to carry out the replacement of the welding between different coil bands in the system of peeling off, The long period may be taken, storing the steel band in disk can continue to export to pickling system at this time, not interfere with pickling system Normal production efficiency.

Pickling system include set gradually from left to right guide roller 1, 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, be effectively prevent steel band and are traveled across Occur jumping up and down phenomenon in journey, can be further to the height of steel band with the direct of travel of stabilized steel band and position, support roller 2 It is adjusted；The 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 Steel band is pressed into the pickle in descaling bath 5 so that steel band is acid washed liquid and soaks completely all the time in continuous forward movement Bubble, realizes acid cleaning process；Pressure roller III 7 is arranged on the top of 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 soaked by clear water all the time, so as to be carried out to the remaining pickle of steel strip surface Cleaning, 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 Purged again, further remove surface acid washing lotion；Pickle is brought into Rinsing Area 8 to reduce steel band, the outlet of descaling bath 5 Place is also equipped with squeeze roller and blow-dry device.

To optimize the pickling effect of steel band, surface quality higher, more bright steel band are obtained, inventor is to the acid that uses Washing lotion is also synchronously optimized, and the pickle used in the present invention consists of the following compositions：Hydrochloric acid, mass percent for 10 ~ 20%；Hydrofluoric acid, mass percent are 5 ~ 8%；Iron chloride, mass percent are 6 ~ 10%；Sldium lauryl sulfate, mass percent For 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 For 0.5%, calgon mass percent is 0.1%；Sldium lauryl sulfate can be effectively increased the activity of pickle, promote with The oxide skin of steel strip surface occurs hair and answers, and accelerates pickling speed, improves pickling efficiency；Calgon contributes to removing to rest on Greasy dirt, oxidation and the unoxidized surface impurity of steel strip surface, improve cleaning, the glossiness of steel strip surface, while in pickle The chlorion of introducing helps to slow down the fast reaction of steel band and pickle, avoids overpickling from causing steel strip substrate to occur rotten Erosion, and effectively suppress the generation of acid mist, the service life of pickle can be extended.

Emergency stop device is arranged on the side of descaling bath 5, including acid tube, deposits sour pond and acid inlet tube, acid tube and acid inlet tube Both ends respectively with pickling tube 501 and depositing sour pond and being connected, kinetic pump is provided with acid inlet tube, when there is cancel closedown, is beaten Begin to rehearse acid tube, and the pickle in pickling tube 501 is discharged into deposit in sour pond and is kept in, when returning to normal production, acid inlet tube Driven by kinetic pump and the pickle deposited in sour pond is withdrawn into pickling tube 501, steel band continues acid cleaning process；The emergency stop The device of device can avoid the occurrence of steel band due to long in the pickling section residence time, follow-up to add in steel strip surface depositing contaminants Work causes steel band to show nigrescence or the phenomenon of jaundice, is conducive to improve the surface quality of steel band, and the emergency stop device sets letter It is single, it is easily operated, it is of low cost.

More than two pickling tubes 501 is provided with descaling bath 5, the lower part of adjacent pickling tube 501 is connected, and steel band is It is to be pierced by pickling tube 501, the outside of pickling tube side wall 503 is provided with sealing structure, including consolidate with 503 phase of pickling tube side wall Sealing side wall 504 even, it is water sealed tank 502 to seal the groove formed between side wall 504 and pickling tube side wall 503, in the water seal The inside of pickling tube 501 is fully sealed with the external world for injected clear water in groove 502, the clear water in water sealed tank 502, you can effectively prevents acid Pickle inside wash pool 501 is because by thermal evaporation and to external diffusion, avoiding pickle pair and the pollution of external environment condition；Each acid It is stamped acid tank cover 4 in the top of wash pool 501.

Acid tank cover 4 includes inner wall 401, outer wall 402, upper cover 403 and deflector 404, and inner wall 401 is located at the lower section of upper cover 403, And the surrounding position of upper cover 403 is connected in, inner wall 401 and upper cover 403 form a hollow cavity, in order to reduce pickling to the greatest extent Heat diffusion in pond 501, the small volume of the hollow cavity, the height of upper cover 403 are relatively low；Inner wall 401 is placed on water seal In groove 502；Outer wall 402 is arranged on the outside of inner wall 401, and the upper surface with sealing side wall 504 is in contact；Upper cover 403 it is interior Side is also fixed with deflector 404 along surrounding, and deflector 404 is located at the inner side of inner wall 401, and deflector 404 is into upper cover 403 Center portion position tilts so that deflector 404 is in contact with the inner side of pickling tube side wall 503, the design of the deflector 404 be in order into One step prevents the leakage of pickle and evaporation from wasting.

Pickle influences to form acid mist because of temperature during pickling, and acid mist gathers the lower section of upper cover 403 and can liquefy again, along The medial surface of upper cover 403 is flowed back into pickling tube 501, and upper cover 403 is arcuate structure, is more advantageous to the reflux of pickle；But skill Art personnel have found that the part pickle after liquefaction can finally be back to 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 pickle is also result in, improves production cost；To avoid This phenomenon, technical staff creatively with the addition of the design of deflector 404, which is arranged on the inner side 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 inner side of the deflector 404 just with pickling tube side wall 503 is in contact, 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 of deflector 404 stop and cannot be introduced into water seal Groove 502, so as to all be flowed back into pickling tube 501 along the smooth surface of deflector 404, avoids diffusion and the wave of pickle Take.Angle between the deflector 404 and pickling tube side wall 503 is that α (is specifically deflector 404 and longitudinal vertical curve in fig. 2 Between angle be α, the longitudinal direction vertical curve is parallel with pickling tube side wall 503), the effect that the size of α flows back for pickle Tool has a certain impact, if α is excessive, pickle can be caused excessive and speed is excessively slow by resistance in flowing back, if α is too small and be unfavorable for The cooperation of whole acid tank cover 4 and pickling tube 501, the action for causing to cover with open are limited；Technical staff is by constantly experiment Grope, finally found that when α is 15 ~ 30 ° most useful for production and application, neither influence the back-flow velocity of pickle, be also beneficial to whole The cooperation of acid tank cover 4 and pickling tube 501, specifically α is 15 ° in the present embodiment.

To strengthen the structural strength of acid tank cover 4, in the center of 403 medial surface of the upper cover setting reinforcing 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 aggregation in pickling tube 501 is excessively then easily led Cause security incident, 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 a large amount of of acid mist will not be caused to leak.

The top of descaling bath 5 is additionally provided with acid mist purifying device, and cooling zone is disposed with acid mist purifying device, is once neutralized Area, secondary neutral zone and demister device, the present invention in be provided with two groups of acid mist purifying devices altogether, respectively descaling bath entrance and Outlet port, the acid mist of entrance first pass around cooling zone and liquefy, then respectively by a neutral zone and secondary neutral zone into Row acid-base neutralization, is finally filtered by demister, and clean gas is discharged.

Embodiment 2

With embodiment 1, except that α sizes are 20 ° in the present embodiment, hydrochloric acid quality in the pickle 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 For 1.5%, calgon mass percent is 0.8%, remaining is water.

Embodiment 3

With embodiment 1, except that α sizes are 30 ° in the present embodiment, hydrochloric acid quality in the pickle 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 For 1.2%, calgon mass percent is 0.5%, remaining is water.

Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in attached drawing What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area 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

A kind of 1. steel strip surface pretreatment system with emergency stop device, it is characterised in that：Including the system of peeling off, pickling system and Emergency stop device, wherein the system of peeling off includes decorticator, dry brushing machine, transfer roller and the storage disk set gradually, it is described to peel off 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 be 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 parallel distribution 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 both sides of one of rotating disk body；Transfer roller includes two pressure rollers of upper and lower parallel distribution, 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 set gradually from left to right guide roller (1), 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), pressure roller III (7) are arranged on above Rinsing Area (8), and the exit of Rinsing Area (8) is also set 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 Sealing structure is provided with the outside of pond side wall (503), including the sealing side wall (504) being fixedly connected with pickling tube side wall (503), it is described 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)；

The emergency stop device is arranged on the side of descaling bath (5), including acid tube, deposits sour pond and acid inlet tube, acid tube and into acid The both ends of pipe are respectively with pickling tube (501) and depositing sour pond and being connected.
A kind of 2. steel strip surface pretreatment system with emergency stop device according to claim 1, it is characterised in that：It is described Acid tank cover (4) includes inner wall (401), outer wall (402), upper cover (403) and deflector (404), and inner wall (401) is located at upper cover (403) lower section, and the surrounding position of upper cover (403) is connected in, inner wall (401) and upper cover (403) form a hollow cavity, Inner wall (401) is placed in above-mentioned water sealed tank (50w)；Outer wall (402) is arranged on the outside of inner wall (401), and and sealed sides The upper surface of wall (504) is in contact；The medial surface of upper cover (403) is also fixed with deflector (404), the deflector along surrounding (404) it is located at the inner side of inner wall (401), and deflector (404) is tilted to upper cover (403) centre so that deflector (404) It is in contact with the inside of pickling tube side wall (503), and the angle between deflector (404) and pickling tube side wall (503) is α, α is Acute angle.
A kind of 3. steel strip surface pretreatment system with emergency stop device according to claim 2, it is characterised in that：It is described Acid tank cover (4) further includes reinforcing plate (405), and wherein upper cover (403) is arcuate structure, and the reinforcing plate (405) is arranged on upper cover (403) center of medial surface, and the both ends of reinforcing plate (405) are fixedly connected with deflector (404) respectively.
A kind of 4. steel strip surface pretreatment system with emergency stop device according to Claims 2 or 3, it is characterised in that： The explosionproof hole through its thickness is offered on the upper cover (403).
A kind of 5. steel strip surface pretreatment system with emergency stop device according to claim 2, it is characterised in that：It is described The size of angle α is 15~30 °.
A kind of 6. steel strip surface pretreatment system with emergency stop device according to claim 1, it is characterised in that：It is described Acid mist purifying device is additionally provided with above descaling bath (5), be disposed with the acid mist purifying device cooling zone, a neutral zone, Secondary neutral zone and demister device.
A kind of 7. steel strip surface pretreatment system with emergency stop device according to claim 1, it is characterised in that：It is described Squeeze roller is additionally provided between descaling bath (5) and Rinsing Area (8).