Pole plate pickling device and method

Abstract

The invention discloses a pole plate pickling device and method, and relates to the technical field of storage battery pole plate production and processing. The device comprises an acid storage tank used for storing acid liquor, N pickling boxes marked as P1,... and PN in sequence are arranged in the acid storage tank in the length direction of the acid storage tank, a supporting system used for driving the pickling boxes to ascend and descend in the vertical direction is arranged under any pickling box, and the supporting system comprises a first supporting mechanism and a second supporting mechanism; during use, the unformed plate is placed in the pickling box, the pickling box is controlled to be immersed in the acid liquor, the bottom of the pickling box is controlled to be separated from the acid liquor after the pickling box is filled with the acid liquor, standing treatment is performed, the acid liquor in the pickling box is controlled to be discharged, and then the unformed plate is taken out. The multiple supporting systems are arranged in the length direction of the acid storage tank, and the pickling box is arranged over any supporting system, so that unformed polar plates are placed in the pickling box during use, and pickling of the unformed polar plates is completed by controlling the pickling box to ascend and descend.

Description

Technical Field

[0001] The invention belongs to the technical field of battery plate production and processing, and particularly relates to a plate acid dipping device and method. Background Art

[0002] During the battery processing, the positive and negative electrode pastes are sprayed on the grid to form the plates. Before drying, the plates need to be placed in a pickling tank filled with concentrated sulfuric acid to allow the positive and negative electrode pastes to react with the concentrated sulfuric acid to form a thin layer of lead sulfate on the surface of the plates. Lead sulfate can prevent cracks in the plates and increase their strength.

[0003] The traditional acid soaking method is to manually load the plate into the acid soaking box, and then put the acid soaking box into the acid soaking tank for reaction; however, this method has high labor intensity, and it is easy to come into contact with concentrated sulfuric acid during transportation, causing human injury. Now, a conveyor belt is often set in the acid soaking tank, and the conveyor belt drives the acid soaking box with hollow holes at the bottom to move. During the movement, the electrode paste on the plate reacts with concentrated sulfuric acid. However, this method still has the following problems: 1. During the process of conveying the acid soaking box, the conveyor belt has insufficient friction, and the acid soaking box will accumulate in the acid soaking tank. Manual assistance is required to achieve the smooth operation of the conveyor belt, and the transmission efficiency is affected; 2. A certain amount of concentrated sulfuric acid will remain in the acid soaking box, which will corrode other equipment during the subsequent transmission process, and at the same time affect the subsequent plate drying time. Summary of the invention

[0004] The object of the present invention is to provide a plate acid soaking device and method, which solves the problems raised by the existing background technology by arranging several support systems along the length direction of the acid storage tank and arranging an acid soaking box just above any support system.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a plate pickling device, comprising an acid storage tank for storing acid solution, and N pickling boxes are arranged inside the acid storage tank along the length direction thereof, and the N pickling boxes are marked as P1, P2, P3, ... and PN in sequence, and a support system for driving the pickling box to rise and fall in a vertical direction is arranged directly below any pickling box, and the support system comprises a first support mechanism and a second support mechanism;

[0007] When in use, the green plates are placed in the acid soaking box, and the acid soaking box is controlled to be immersed in the acid solution. After the acid soaking box is filled with the acid solution, the bottom of the acid soaking box is controlled to be separated from the acid solution. After standing, the acid solution in the acid soaking box is controlled to be discharged, and then the green plates can be taken out.

[0008] Furthermore, the first supporting mechanism comprises an inner sleeve arranged on the inner bottom side of the acid storage tank, the top of the inner sleeve is telescopically sleeved with a sleeve, the outer peripheral side wall of the sleeve is provided with a convex edge, and a spring is connected between the convex edge and the inner bottom side of the acid storage tank; a mounting bracket is fixed on the top of the inner sleeve, a telescopic member telescopic in the vertical direction is installed on the bottom side of the mounting bracket, and the end of the telescopic member is connected to a porous plate sliding along the inner sleeve; at least one traction rope is connected to the upper surface of the porous plate, and the end of the traction rope is connected to the inner bottom side of the sleeve;

[0009] Furthermore, the second supporting mechanism includes an outer sleeve A respectively installed on the outer bottom side of the pickling box and the inner bottom side of the acid storage tank, and a guide column with a channel arranged inside; the bottom side of the acid storage tank is provided with an air inlet and an exhaust port connected to the channel, and the air inlet and the exhaust port are respectively installed with a one-way air intake structure and an exhaust structure.

[0010] Furthermore, the number of the second supporting mechanisms is four, and the four second supporting mechanisms are evenly arranged around the circumference of the first supporting mechanism.

[0011] Furthermore, an opening is provided on the bottom side of the pickling box located directly above the first supporting mechanism; the outer bottom side of the pickling box located around the opening is connected to a substrate through an elastic telescopic element, and a sealing plate is provided on the upper surface of the substrate to cooperate with the opening to form a seal.

[0012] Furthermore, the end of any exhaust structure is connected to an exhaust pipe, and the other end of the exhaust pipe extends to the outside of the acid storage tank; and a cut-off structure is provided on the exhaust pipe arrangement route corresponding to the pickling boxes marked as P2, P3, ... and PN.

[0013] Furthermore, the intercepting structure includes a rectangular tube, the exhaust pipe passes through the rectangular tube, and a telescopic module A and a telescopic module B are provided on an inner wall of the exhaust pipe, and the telescopic module A and the telescopic module B are respectively provided with clamping heads.

[0014] Furthermore, the bottom side of the pickling box marked as P1, P2, ... and PN-1 is connected to a vertical rod, the end of the vertical rod is connected to a cross rod, and one end of the cross rod protrudes from an edge side of the pickling box; the inner walls of the acid storage tank above and below the cross rod protruding from an edge side of the pickling box are respectively provided with a telescopic module C and a telescopic module D; the telescopic module C is connected to the telescopic module A, and the telescopic module D is connected to the telescopic module B.

[0015] Furthermore, the telescopic modules A, B, C and D have the same structure. The telescopic module A includes an inner sleeve body and an outer sleeve body that are sealed and sleeved with each other, and a reset spring is connected between the inner sleeve body and the outer sleeve body.

[0016] Furthermore, the first supporting mechanism also includes a telescopic sleeve A connected between the acid storage tank and the acid pickling box, and the second supporting mechanism also includes a telescopic sleeve B connected between the acid storage tank and the acid pickling box; the end of the guide column is provided with a groove connected to the channel, and the air inlet and the exhaust port are both connected to the groove.

[0017] A method for pickling a plate, the method for pickling a plate is based on the above-mentioned device for pickling a plate;

[0018] The plate pickling method specifically includes:

[0019] Step 1, control the green plate to be placed in the pickling box marked as P1, and then control the telescopic member to extend, and then drive the pickling box to be immersed in the acid solution, and the acid solution in the acid storage tank enters the pickling box through the opening;

[0020] Step 2, controlling the telescopic member to return to the initial state, at which time the pickling box slowly moves upward until the bottom side of the pickling box is separated from the acid liquid surface, and at the same time, the telescopic module A and the telescopic module B are controlled to be in a retracted state;

[0021] Step 3, repeat steps 1-2 until pickling boxes are placed on all pickling boxes;

[0022] Step 4, take out the green plates placed in the acid soaking boxes marked as P1, P2, ... and PN in sequence, and put in new green plates while taking out the green plates;

[0023] Step 5: Repeat step 4.

[0024] Furthermore, the acid storage tank is provided with a density detection mechanism for detecting the density of the acid liquid, and a liquid level gauge for detecting the liquid level in the acid storage tank; the pickling box is provided with a temperature control system for detecting and controlling the temperature of the acid liquid; and one side wall of the acid storage tank is connected with an acid adding pipe and a water adding pipe.

[0025] The present invention has the following beneficial effects:

[0026] The present invention arranges a plurality of support systems along the length direction of the acid storage tank, and arranges an acid soaking box just above any support system, so that the green plates can be placed in the acid soaking box during use, and the green plates can be acid soaked by controlling the lifting and lowering of the acid soaking box.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the pickling device of the present invention;

[0030] Figure 2 for Figure 1 Top view;

[0031] Figure 3 for Figure 2 Sectional view at AA;

[0032] Figure 4 for Figure 3 A partial enlarged view of the middle part;

[0033] Figure 5 It is a schematic diagram of the structure of the second supporting mechanism of the present invention;

[0034] Figure 6 This is a schematic diagram of the arrangement state of the telescopic module C and the telescopic module D of the present invention;

[0035] Figure 7 It is a schematic diagram of the intercepting structure of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] See also Figure 1-2As shown, the present invention is a plate pickling device, comprising an acid storage tank 1 storing a large amount of acid solution, and five independent pickling boxes 2 are arranged inside the acid storage tank 1 along its length direction, and a support system for driving the pickling box 2 to rise and fall in a vertical direction is arranged directly below any pickling box 2, and the support system comprises a first support mechanism;

[0039] When in use, the green plates are placed in the acid soaking box 2, and the acid soaking box 2 is controlled to be immersed in the acid solution. After the acid soaking box 2 is filled with the acid solution, the bottom of the acid soaking box 2 is controlled to be separated from the acid solution. After standing, the acid solution in the acid soaking box 2 is controlled to be discharged, and then the green plates can be taken out.

[0040] Specifically, the present invention provides Figure 3-4 The first supporting mechanism comprises an inner sleeve 33 arranged on the inner bottom side of the acid storage tank 1, the top of the inner sleeve 33 is telescopically sleeved with a sleeve 31, the outer peripheral side wall of the sleeve 31 is provided with a convex edge 311, and a spring 312 is connected between the convex edge 311 and the inner bottom side of the acid storage tank 1; a mounting bracket 331 is fixed on the top of the inner sleeve 33, and a telescopic member 332 that telescopes in the vertical direction is installed on the bottom side of the mounting bracket 331, and a porous plate 333 that slides along the inner sleeve 33 is connected to the end of the telescopic member 332; at least one traction rope 334 is connected to the upper surface of the porous plate 333, The end of the traction rope 334 is connected to the inner bottom side of the sleeve 31. When the telescopic member 332 is used, the telescopic motor is used to control the telescopic member 332 to extend. At this time, the first support mechanism is in a retracted state as a whole. Conversely, when the telescopic member 332 is controlled to retract, the first support mechanism is in an extended state as a whole. When the bottom of the pickling box 2 is controlled to separate from the liquid level in the acid storage tank 1, this state is a common state. In this state, the telescopic member 332 is controlled to retract to the initial state to avoid damage to the telescopic member 332 caused by excessive load due to long-term use.

[0041] At the same time, an opening 20 is provided on the bottom side of the pickling box 2 located directly above the first supporting mechanism; the outer bottom side of the pickling box 2 located around the opening 20 is connected to a substrate 202 through an elastic telescopic element 201, and a sealing plate 203 is provided on the upper surface of the substrate 202 to form a seal with the opening 20; at the same time, the top end of the first supporting mechanism provided by the present invention abuts against or separates from the bottom side of the pickling box 2 when in use.

[0042] When the green plate is put into the pickling box 2, the telescopic member 332 is controlled to extend, and the top of the first supporting mechanism is separated from the base plate 202. Then, the pickling box 2 is controlled to move downward under the gravity of the green plate, and the sealing plate 203 is separated from the opening 20, and the acid enters the pickling box 2 through the opening 20;

[0043] When it is necessary to control the pickling box 2 to rise, the telescopic member 332 is controlled to retract. At this time, the top of the first supporting mechanism extends out and abuts against the base plate 202, thereby causing the sealing plate 203 to block the opening 20, thereby preventing the acid in the pickling box 2 from being discharged into the acid storage tank 1 through the opening 20.

[0044] Based on the above, when in use, when the telescopic member 332 is controlled to extend to the top end of the first support mechanism and detach from the substrate 202, it is necessary to limit the speed at which the pickling box 2 moves downward. Based on this, the support system also includes four groups of second support mechanisms 4, and the four groups of second support mechanisms 4 are evenly arranged around the circumference of the first support mechanism.

[0045] Specifically, in order to facilitate the control of the second support mechanism 4 to meet the design requirements, that is, the first support mechanism is extended synchronously and quickly, and when the first support mechanism is retracted, the second support mechanism 4 is extended synchronously and quickly. Figure 5 , the second supporting mechanism 4 slowly contracts. The second supporting mechanism 4 provided by the present invention comprises an outer sleeve A41 respectively installed on the outer bottom side of the pickling box 2 and the inner bottom side of the acid storage tank 1, and a guide column 42 with a channel 421 arranged inside; the bottom side of the acid storage tank 1 is provided with an air inlet 11 and an exhaust port 12 connected with the channel 421, and a one-way air inlet structure 43 and an exhaust structure 44 are respectively installed at the air inlet 11 and the exhaust port 12.

[0046] The air intake structure 43 and the air exhaust structure 44 realize one-way air intake or exhaust, and a one-way valve or a valve core is used.

[0047] A method for acidizing a plate, comprising:

[0048] Step 1, control the green plate to be placed in the pickling box 2 marked as P1, and then control the telescopic member 332 to extend, and then drive the pickling box 2 to be immersed in the acid solution, and then the acid solution in the acid storage tank 1 enters the pickling box 2 through the opening 20;

[0049] Step 2, control the telescopic member 332 to return to the initial state, at which time the pickling box 2 slowly moves upward until the bottom side of the pickling box 2 is separated from the acid liquid surface, and at the same time, the telescopic module A462 and the telescopic module B463 are controlled to be in a contracted state;

[0050] Step 3, repeating steps 1-2 until the pickling boxes 2 are placed on all the pickling boxes 2;

[0051] Step 4, take out the green plates placed in the acid soaking boxes 2 marked as P1, P2, ... and P5 in sequence, and put in new green plates while taking out the green plates;

[0052] Step 5: Repeat step 4.

[0053] It can be known that, in order to ensure that the green plates are placed into the pickling box 2 in the order marked as P1, P2, ... and P5 during use, the green plates in the pickling box 2 are taken out in the order marked as P1, P2, ... and P5; that is, when in use, any two adjacent pickling boxes 2 marked as P1, P2, ... and P5 need to be processed in linkage.

[0054] The ends of any exhaust structure 44 provided by the present invention are connected to an exhaust pipe 45, and the other end of the exhaust pipe 45 extends to the outside of the acid storage tank 1; wherein the exhaust pipe 45 corresponding to the pickling boxes 2 marked as P2, P3, ... and P5 is provided with a cut-off structure 46 on the arrangement route, and the bottom side of the pickling boxes 2 marked as P1, P2, ... and P4 is connected to a vertical rod 21, such as Figure 6 The end of the vertical rod 21 is connected to the cross rod 22, and one end of the cross rod 22 protrudes from an edge side of the pickling box 2; the inner walls of the acid storage tank 1 above and below the cross rod 22 protruding from an edge side of the pickling box 2 are respectively provided with a telescopic module C23 and a telescopic module D24; the telescopic module C23 is connected to the telescopic module A462, and the telescopic module D24 is connected to the telescopic module B463.

[0055] Based on the above settings, only when a set number / weight of green plates are placed in the pickling box 2, the cross bar 22 is used to ensure that the telescopic module C23 and the telescopic module D24 are in a natural state, while keeping the telescopic module D24 and the telescopic module B463 in a natural state, thereby avoiding the telescopic module D24 / telescopic module B463 from extending out to form a flow interception.

[0056] Specifically, Figure 7 As shown, the intercepting structure 46 includes a rectangular tube 461, the exhaust pipe 45 passes through the rectangular tube 461, and a telescopic module A462 and a telescopic module B463 are arranged on an inner wall of the exhaust pipe 45, and the telescopic module A462 and the telescopic module B463 are respectively provided with a clamping head 464; and the telescopic module A462, the telescopic module B463, the telescopic module C23 and the telescopic module D24 have the same structure, the telescopic module A462 includes an inner sleeve body and an outer sleeve body which are sealed and sleeved with each other, and a reset spring is connected between the inner sleeve body and the outer sleeve body.

[0057] It should be noted that in order to avoid corrosion and penetration of the acid solution, the first supporting mechanism also includes a telescopic sleeve A30 connected between the acid storage tank 1 and the pickling box 2, and the second supporting mechanism 4 also includes a telescopic sleeve B40 connected between the acid storage tank 1 and the pickling box 2; the end of the guide column 42 is provided with a groove 422 connected to the channel 421, and the air inlet 11 and the exhaust port 12 are both connected to the groove 422.

[0058] It can be known that a density detection mechanism for detecting the density of the acid liquid and a liquid level meter for detecting the liquid level in the acid storage tank 1 are arranged in the acid storage tank 1, and an acid adding pipeline and a water adding pipeline are connected to one side wall of the acid storage tank 1.

[0059] A temperature control system for detecting and controlling the temperature of the acid solution is arranged in the pickling box 2 .

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A plate acid soaking device, characterized in that: include: An acid storage tank (1) for storing acid solution; A pickling box (2) is arranged inside the acid storage tank (1), and a support system for driving the pickling box (2) to rise and fall in a vertical direction is arranged directly below the acid storage tank (1); When in use, the green plate is placed in the acid soaking box (2), and the acid soaking box (2) is controlled to be immersed in the acid solution. After the acid soaking box (2) is filled with the acid solution, the bottom of the acid soaking box (2) is controlled to be separated from the acid solution. After the acid solution in the acid soaking box (2) is controlled to be discharged after being left to stand, the green plate can be taken out. The support system comprises a first support mechanism and a second support mechanism (4); The first supporting mechanism comprises an inner sleeve (33) arranged on the inner bottom side of the acid storage tank (1), the top of the inner sleeve (33) is telescopically sleeved with a sleeve (31), the outer peripheral side wall of the sleeve (31) is provided with a convex edge (311), and a spring (312) is connected between the convex edge (311) and the inner bottom side of the acid storage tank (1); A mounting bracket (331) is fixed on the top of the inner sleeve (33); a telescopic member (332) that telescopes in a vertical direction is mounted on the bottom side of the mounting bracket (331); the end of the telescopic member (332) is connected to a porous plate (333) that slides along the inner sleeve (33); at least one traction rope (334) is connected to the upper surface of the porous plate (333); the end of the traction rope (334) is connected to the inner bottom side of the sleeve (31); The second supporting mechanism (4) comprises an outer sleeve A (41) respectively mounted on the outer bottom side of the pickling box (2) and the inner bottom side of the acid storage tank (1), and a guide column (42) with a channel (421) arranged inside; An air inlet (11) and an air outlet (12) which are in communication with the channel (421) are provided on the bottom side of the acid storage tank (1), and a one-way air inlet structure (43) and an air outlet structure (44) are respectively installed at the air inlet (11) and the air outlet (12).

2. A plate pickling device according to claim 1, characterized in that: The number of the second supporting mechanisms (4) is four, and the four second supporting mechanisms (4) are evenly arranged around the circumference of the first supporting mechanism.

3. The plate pickling device according to claim 1, characterized in that: An opening (20) is provided on the bottom side of the pickling box (2) located directly above the first supporting mechanism; The outer bottom side of the pickling box (2) located around the opening (20) is connected to a base plate (202) via an elastic telescopic element (201), and a sealing plate (203) is provided on the upper surface of the base plate (202) for cooperating with the opening (20) to form a seal.

4. The plate pickling device according to claim 3, characterized in that: N pickling boxes (2) are arranged along the length direction of the acid storage tank (1), and the N pickling boxes (2) are marked as P1, P2, P3, ... and PN in sequence; The end of any exhaust structure (44) is connected to an exhaust pipe (45), and the other end of the exhaust pipe (45) extends to the outside of the acid storage tank (1); A shutoff structure (46) is provided on the route of the exhaust pipes (45) corresponding to the pickling boxes (2) marked as P2, P3, ... and PN.

5. The plate pickling device according to claim 4, characterized in that: The intercepting structure (46) comprises a rectangular tube (461), the exhaust pipe (45) passes through the rectangular tube (461), and a telescopic module A (462) and a telescopic module B (463) are arranged on an inner wall of the exhaust pipe (45), and the telescopic module A (462) and the telescopic module B (463) are respectively provided with clamping heads (464).

6. The plate pickling device according to claim 4, characterized in that: The bottom side of the pickling box (2) marked as P1, P2, ... and PN-1 is connected to a vertical rod (21), the end of the vertical rod (21) is connected to a cross rod (22), and one end of the cross rod (22) protrudes from an edge side of the pickling box (2); A telescopic module C (23) and a telescopic module D (24) are respectively provided on the inner walls of the acid storage tank (1) above and below the cross bar (22) extending from an edge side of the pickling box (2); The telescopic module C (23) is connected to the telescopic module A (462), and the telescopic module D (24) is connected to the telescopic module B (463).

7. The electrode plate pickling device according to claim 6, characterized in that: The telescopic module A (462), telescopic module B (463), telescopic module C (23) and telescopic module D (24) all have the same structure. The telescopic module A (462) includes an inner sleeve body and an outer sleeve body that are sealed and sleeved with each other, and a return spring is connected between the inner sleeve body and the outer sleeve body.

8. The electrode plate pickling device according to claim 6, characterized in that: The first supporting mechanism further comprises a telescopic sleeve A (30) connected between the acid storage tank (1) and the pickling box (2), and the second supporting mechanism (4) further comprises a telescopic sleeve B (40) connected between the acid storage tank (1) and the pickling box (2); The end of the guide column (42) is provided with a groove (422) which is in communication with the channel (421), and the air inlet (11) and the air outlet (12) are both in communication with the groove (422).

9. A method for acidizing a plate, characterized in that: The plate pickling method is based on a plate pickling device as described in any one of claims 6 to 8 above; The plate pickling method specifically includes: Step 1, control the green plate to be placed in the pickling box (2) marked as P1, and then control the telescopic member (332) to extend, thereby driving the pickling box (2) to be immersed in the acid solution, and the acid solution in the acid storage tank (1) enters the pickling box (2) through the opening (20); Step 2, controlling the telescopic member (332) to return to the initial state, at which time the pickling box (2) slowly moves upward until the bottom side of the pickling box (2) is separated from the acid liquid surface, and at the same time, the telescopic module A (462) and the telescopic module B (463) are controlled to be in a retracted state; Step 3, repeating steps 1-2 until the pickling boxes (2) are placed on all the pickling boxes (2); Step 4, taking out the green plates placed in the acid soaking boxes (2) marked with P1, P2, ... and PN in sequence, and putting in new green plates at the same time as the green plates are taken out; Step 5: Repeat step 4.

10. The electrode plate pickling device according to claim 4, characterized in that: The acid storage tank (1) is provided with a density detection mechanism for detecting the density of the acid liquid, and a liquid level meter for detecting the height of the liquid level in the acid storage tank (1); The pickling box (2) is provided with a temperature control system for detecting and controlling the temperature of the acid solution; One side wall of the acid storage tank (1) is connected with an acid adding pipeline and a water adding pipeline.

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