CN115044916B - Strip steel pickling equipment capable of rapidly changing concentration of pickling solution and application method thereof - Google Patents

Strip steel pickling equipment capable of rapidly changing concentration of pickling solution and application method thereof Download PDF

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Publication number
CN115044916B
CN115044916B CN202210701060.0A CN202210701060A CN115044916B CN 115044916 B CN115044916 B CN 115044916B CN 202210701060 A CN202210701060 A CN 202210701060A CN 115044916 B CN115044916 B CN 115044916B
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China
Prior art keywords
acid
tank
control valve
tube
fixedly connected
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CN115044916A (en
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王金鹏
刘立刚
张勇
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Benxi Steel Puxiang Cold Rolled Sheet Co ltd
Bengang Steel Plates Co Ltd
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Benxi Steel Puxiang Cold Rolled Sheet Co ltd
Bengang Steel Plates Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00Apparatus for cleaning or pickling metallic material
    • C23G3/02Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/021Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08Iron or steel
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00Apparatus for cleaning or pickling metallic material
    • C23G3/02Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/025Details of the apparatus, e.g. linings or sealing means

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The invention discloses strip steel pickling equipment capable of rapidly changing the concentration of pickling solution and a using method thereof, the strip steel pickling equipment comprises a first overflow groove, a fourth connecting pipe, a fifth connecting pipe, a sixth connecting pipe, a seventh connecting pipe, an eighth connecting pipe, a ninth connecting pipe, a third mounting pipe, a fourth mounting pipe and a fifth mounting pipe, wherein one side of the first overflow groove is sequentially provided with the first acid groove, the second overflow groove, the third acid groove and the fourth overflow groove, the first overflow groove is fixedly connected with the first mounting pipe, one end of the first connecting pipe and one end of the second connecting pipe are fixedly connected with the first acid groove, and one end of the third connecting pipe is fixedly connected with the second overflow groove.

Description

Strip steel pickling equipment capable of rapidly changing concentration of pickling solution and application method thereof
Technical Field
The invention relates to the technical field of strip steel pickling, in particular to strip steel pickling equipment capable of rapidly changing the concentration of pickling solution and a use method thereof.
Background
The pickling of the large-scale strip steel is a front procedure of cold rolling, and is to continuously remove oxide scales from the uncoiled hot rolled strip steel through acid liquor in a pickling tank. On one hand, the iron scale is continuously dissolved, and on the other hand, the cascade replacement of the acid liquor is continuously carried out, so that the concentration of free acid and iron ions in the acid liquor is kept in a range meeting the requirements. With the expansion of cold rolled steel grades, the concentration of free acid required for pickling of different steel grades varies considerably. Because of the large acid liquor content, the concentration of the free acid is changed greatly by a cascade acid liquor replacement method, which takes a few hours, and the method is difficult to adapt to the characteristic that the modern cold rolling production of multiple steel grades is frequently changed, so that the iron scales of the multiple steel grades cannot be completely removed.
Disclosure of Invention
The invention aims to provide strip steel pickling equipment capable of rapidly changing the concentration of pickling solution and a use method thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a strip steel pickling device capable of rapidly changing the concentration of pickling solution, which comprises a first overflow tank, a first pickling tank, a first connecting pipe, a second connecting pipe, a third connecting pipe, a second overflow tank, a second pickling tank, a fourth connecting pipe, a fifth connecting pipe, a sixth connecting pipe, a third overflow tank, a third pickling tank, a seventh connecting pipe, an eighth connecting pipe, a ninth connecting pipe, a fourth overflow tank, a first mounting pipe, a second mounting pipe, a first control valve, a first acid tank, a third mounting pipe, a first circulating pump, a second control valve, a fourth mounting pipe, a fifth mounting pipe, a third control valve, a fourth control valve, a second acid tank, a fifth control valve, a sixth mounting pipe, a seventh mounting pipe, a sixth control valve, a first component tank, an eighth mounting pipe, a third acid tank, a seventh control valve, a ninth component tank, a new acid liquid storage tank, a ninth control valve, a first circulating pump, a third circulating pump, a second drainage pipe, a tenth control valve, an eleventh control valve, a seventeenth control valve, a first acid tank, a second overflow tank, a second acid tank, a third overflow tank, a third acid tank and a fourth overflow tank are sequentially arranged on one side of the first overflow tank, a first installation pipe is fixedly connected on the first overflow tank, one end of a first connecting pipe and one end of a second connecting pipe are fixedly connected on the first overflow tank, one end of a third connecting pipe is fixedly connected on the second overflow tank, and the other end fixed connection of third connecting pipe is on first installation tube, first installation tube fixed connection is on first sour jar simultaneously, and the other end fixed connection of first connecting pipe is on third connecting pipe, first circulating pump of first sour jar through third installation tube fixed connection, the one end of first sour jar upper fixed connection second installation tube is provided with first control valve simultaneously on the second installation tube, and the other end fixed connection of second installation tube is on the second connecting tube, the other end fixed connection of second connecting tube is in fifth circulating pump's exit end department, be provided with seventeenth control valve simultaneously on the second connecting tube, and the junction of second installation tube and second connecting tube is located between seventeenth control valve and the fifth circulating pump, be provided with the eighteenth control valve on the first component jar through first cooperation pipe fixedly connected with first component jar, the junction of this first cooperation pipe and second installation tube is located between first control valve and the junction of second installation tube and second, the fifth circulating pump's suction end fixed connection has the fifth control valve to be located on the second installation tube and the junction of second installation tube simultaneously, the junction of fifth circulating pump is located between fifth cooperation valve and the fifth circulating pump, the fifth cooperation valve is located on the fifth installation tube and the fifth connecting tube simultaneously, the junction is located between the fifth cooperation valve and the fifth circulating pump.
Preferably, one end of a fourth installation tube is fixedly connected to the first acid tank, the other end of the fourth installation tube is fixedly connected to the second acid tank, one end of a fifth drainage tube is fixedly connected to the second acid tank, the other end of the fifth drainage tube is fixedly connected to the second overflow tank, one end of a fourth connection tube and one end of a fifth connection tube are fixedly connected to the second acid tank, one end of a sixth connection tube is fixedly connected to the third overflow tank, the other end of the sixth connection tube is fixedly connected to the fifth drainage tube, the other end of the fourth connection tube is fixedly connected to the sixth connection tube, the other end of the fifth connection tube is fixedly connected to the outlet end of the fourth circulation pump, and a nineteenth control valve is arranged on the fifth connection tube.
Preferably, the suction end of the fourth circulating pump is fixedly connected with one end of a sixth installation tube, meanwhile, the other end of the sixth installation tube is fixedly connected to the second acid tank, a fourteenth control valve and a fifth control valve are arranged on the sixth installation tube, the fourteenth control valve is located on one side close to the fourth circulating pump, one end of a fourth drainage tube is fixedly connected to the second acid tank, the other end of the fourth drainage tube is fixedly connected to the fifth connection tube, and meanwhile, the joint of the fourth drainage tube and the fifth connection tube is located between the nineteenth control valve and the fourth circulating pump.
Preferably, one end of the fourth drainage tube is provided with a sixteenth control valve, the fourth drainage tube is fixedly connected with the second component tank through a third matching tube, a fifteenth control valve is arranged on the third matching tube, the joint of the third matching tube and the fourth drainage tube is located between the sixteenth control valve and the joint of the fourth drainage tube and the fifth connecting tube, meanwhile, the sixth installation tube is fixedly connected on the second component tank through a fourth matching tube, meanwhile, a sixth control valve is arranged on the fourth matching tube, and the joint of the fourth matching tube and the sixth installation tube is located between the fifth control valve and the fourteenth control valve.
Preferably, one end of a seventh installation tube is fixedly connected to the second acid tank, the other end of the seventh installation tube is fixedly connected to the third acid tank, one end of a second drainage tube is fixedly connected to the third acid tank, the other end of the second drainage tube is fixedly connected to the third overflow groove, one ends of a seventh connection tube and an eighth connection tube are respectively fixedly connected to the third acid tank, one end of a ninth connection tube is fixedly connected to the fourth overflow groove, the other end of the ninth connection tube is fixedly connected to the second drainage tube, and the other end of the seventh connection tube is fixedly connected to the ninth connection tube.
Preferably, the other end of the eighth connecting pipe is fixedly connected to the outlet end of the second circulating pump, meanwhile, an eleventh control valve is arranged on the eighth connecting pipe, the suction end of the second circulating pump is fixedly connected to one end of a ninth installation pipe, the other end of the ninth installation pipe is fixedly connected to a third acid tank, meanwhile, the ninth installation pipe is provided with a ninth control valve and a seventh control valve, the eleventh control valve is located on one side close to the second circulating pump, one end of a third drainage pipe is fixedly connected to the third acid tank, the other end of the third drainage pipe is fixedly connected to the eighth connecting pipe, and the joint of the third drainage pipe and the eighth connecting pipe is located between the eleventh control valve and the second circulating pump.
Preferably, one end of the third drainage tube is provided with a thirteenth control valve, meanwhile, the third drainage tube is fixedly connected with a third component tank through a fifth matching tube, the fifth matching tube is provided with a twelfth control valve, and meanwhile, the connection part of the fifth matching tube and the third drainage tube is located between the thirteenth control valve and the connection part of the third drainage tube and the eighth connection tube.
Preferably, the ninth installation tube is fixedly connected with a third component tank through a sixth matching tube, meanwhile, an eighth control valve is arranged on the sixth matching tube, the joint of the eighth control valve and the ninth installation tube is located between the seventh control valve and the ninth control valve, one end of the eighth installation tube is fixedly connected to the third acid tank, the other end of the eighth installation tube is fixedly connected to a new acid liquid storage tank, a new acid liquid transfer tank is connected to the eighth installation tube, meanwhile, one end of the first drainage tube is fixedly connected to the new acid liquid storage tank, the other end of the first drainage tube is fixedly connected to the third acid tank, a tenth control valve and a third circulating pump are arranged on the first drainage tube, and meanwhile, the tenth control valve is located between the third circulating pump and the joint of the first drainage tube and the third acid tank.
The use method of the strip steel pickling equipment capable of rapidly changing the concentration of pickling solution comprises the following steps of firstly, stopping; step two, refluxing; step three, acid washing; step four, acid separation; step five, supplementing; step six, adjusting;
in the first step, when the strip steel pickling device is in a stop state, the strip steel stops advancing, the strip steel advances in the direction from the first overflow groove to the pickling process, the pickling process is finished from the fourth overflow groove, and the strip steel stops advancing, namely the pickling process stops, and the pickling is completely returned to the first acid tank and the second acid tankThe acid tank and the third acid tank, and the acid liquor holding amount in the first acid tank, the second acid tank and the third acid tank is 30m respectively 3 Simultaneously, the concentration of the acid liquor free acid in the third overflow tank is 140g/L, and during the process of acid washing returning, a seventeenth control valve, a nineteenth control valve, an eleventh control valve, a third control valve, a first control valve, a sixth control valve, a sixteenth control valve, an eighth control valve and a thirteenth control valve are closed, and a second control valve, an eighteenth control valve, a fifth control valve, a fifteenth control valve, a seventh control valve, a fourth control valve, a fourteenth control valve, a ninth control valve and a twelfth control valve are opened, and then a fifth circulation pump, a fourth circulation pump and a second circulation pump are opened;
In the second step, as the fifth circulating pump, the fourth circulating pump and the second circulating pump are opened, the acid liquor in the first acid tank flows back to the first component tank through the fifth mounting pipe, the acid liquor in the second acid tank flows back to the second component tank through the sixth mounting pipe, and the acid liquor in the third acid tank flows back to the third component tank through the ninth mounting pipe;
in the third step, when the acid liquor in the first acid tank, the second acid tank and the third acid tank is respectively 15m 3 The eighteenth control valve, the fifteenth control valve and the twelfth control valve can be closed so that the acid solution does not enter the first, second and third component tanks any more, then the seventeenth, nineteenth and eleventh control valves are opened, at this time, the acid solution in the first acid tank flows into the first acid tank through the fifth mounting pipe and the second connecting pipe, the acid solution in the second acid tank flows into the second acid tank through the sixth mounting pipe and the fifth connecting pipe, the acid solution in the third acid tank flows into the third acid tank through the ninth mounting pipe and the eighth connecting pipe, and after the acid solution in the first, second and third acid tanks is full-flowed, the full-flowed acid solution flows into the first, second, third and fourth overflow tanks, and the acid solution in the first overflow tank flows into the first acid tank through the first mounting pipe, the acid solution in the second overflow tank flows into the second acid tank through the third and the fifth drain pipe in real time, the acid solution in the third acid tank flows into the third acid tank through the third and the third overflow pipe in real time The liquid flows into the third acid tank in real time through the sixth connecting pipe and the second drainage pipe, meanwhile, the acid liquid in the fourth overflow groove flows into the third acid tank in real time through the ninth connecting pipe, so that an acid liquid working cycle is formed, and then the strip steel can be subjected to acid washing treatment;
in the fourth step, the acid liquor in the first acid tank is firstly injected into the first component tank for 15m 3 I.e. the acid liquor in the first acid tank is changed from 30m 3 Reduced to 15m 3 The method comprises the steps of carrying out a first treatment on the surface of the Then the acid liquor in the second acid tank is injected into the second component tank for 15m 3 I.e. the acid liquor in the second acid tank is formed by 30m 3 Reduced to 15m 3 The method comprises the steps of carrying out a first treatment on the surface of the Finally, the acid liquor in the third acid tank is injected into the third component tank for 15m 3 I.e. the acid liquor of the third acid tank is formed by 30m 3 Reduced to 15m 3
In the fifth step, the regenerated acid liquor is transported to a new acid liquor transfer tank by a regeneration technology, the new acid liquor storage tank and a third acid tank are respectively subjected to acid supply treatment by the new acid liquor transfer tank, the concentration of the new acid liquor in the new acid liquor transfer tank is 190g/L, and the flow rate of the new acid liquor in the new acid liquor transfer tank flowing into the third acid tank is 9m 3 After flowing into the new acid tank, opening a third circulating pump and a tenth control valve, wherein the new acid in the new acid tank flows into the third acid tank through the first drainage tube, and the new acid with the concentration of 190g/L is 6m 3 The flow rate of/h enters the third acid tank, the third acid tank is connected with the second acid tank through a seventh mounting pipe, the second acid tank is connected with the first acid tank through a fourth mounting pipe, so that the second acid tank and the first acid tank are respectively replenished with new acid liquid in the process of replenishing the third acid tank, the acid liquid in the first acid tank can be discharged to an acid regeneration room through the third mounting pipe and the first circulating pump, and in the process of replenishing the new acid liquid in the third acid tank, the acid supply treatment is actually carried out on the third acid tank together by the new acid liquid transfer tank and the new acid liquid storage tank, and the total flow rate of the new acid liquid which actually flows into the third acid tank is 15m 3 And/h, simultaneously passing the acid liquor in the first acid tank through the third installation pipe and the first circulating pumpIs 15m 3 /h;
In the sixth step, when the concentration of the free acid in the third acid tank is adjusted, the concentration calculation formula is calculated according to the concentration:
N1·V1+N2·V2=N3·V3
V1+V2=N3·V3
the following steps are obtained:
t=V2·(N3-N2)÷(N1-N3)÷FL
wherein N1 is the concentration of the new acid solution; n2 is the concentration of the original acid liquor; n3 is the concentration of the acid liquor after being changed; v1 is the volume of the new acid liquor; v2 is the volume of the original acid liquor; v3 is the volume of the acid liquor after being changed; t is the time required by the concentration change of the acid liquor; FL is the flow rate of make-up fresh acid; the time required for the adjustment of the density is calculated from the density calculation formula by detecting the required data.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, a new acid liquid storage tank is added, the capacity of supplying new acid liquid to a production line is increased, and meanwhile, in the process of acid supply, the new acid liquid is transported to a third acid tank through a first drainage tube and an eighth installation tube; the invention also adds three component tanks, namely a first component tank, a second component tank and a third component tank, when the pickling concentration of the system needs to be improved, the acid liquor in the first acid tank, the second acid tank and the third acid tank is respectively injected into the first component tank, the second component tank and the third component tank for 15m 3 The acid liquor of the whole system participating in the acid washing circulation is halved, so that the concentration of the acid liquor participating in the acid washing circulation is rapidly increased in the acid liquor cascade replacement process; according to the characteristic of acid liquor replacement in acid liquor production and a concentration algorithm formula, a time formula required by the acid liquor production to change the concentration of free acid in acid liquor by a cascade acid liquor replacement method is established, namely t=v2· (N3-N2)/(N1-N3)/(FL); according to the formula, a method for reducing the acid liquor holding amount V2 is adopted to shorten the time required for changing the concentration of free acid in the acid liquor through cascade acid liquor replacement; meanwhile, according to the formula, the invention adopts the method of increasing the flow rate FL of the cascade acid liquor replacement to shorten the time required for changing the concentration of free acid in the acid liquor by the cascade acid liquor replacement, thereby improving the efficiency and the acid cleaning Quality.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a partial structure of the present invention;
FIG. 3 is a flow chart of the method of the present invention;
in the figure: 1. a first overflow trough; 2. a first acid tank; 3. a first connection pipe; 4. a second connection pipe; 5. a third connection pipe; 6. a second overflow trough; 7. a second acid tank; 8. a fourth connection pipe; 9. a fifth connection pipe; 10. a sixth connection pipe; 11. a third overflow trough; 12. a third acid tank; 13. a seventh connection pipe; 14. an eighth connection pipe; 15. a ninth connection pipe; 16. a fourth overflow launder; 17. a first mounting tube; 18. a second mounting tube; 19. a first control valve; 20. a first acid tank; 21. a third installation tube; 22. a first circulation pump; 23. a second control valve; 24. a fourth installation tube; 25. a fifth installation tube; 26. a third control valve; 27. a fourth control valve; 28. a second acid tank; 29. a fifth control valve; 30. a sixth installation tube; 31. a seventh installation tube; 32. a sixth control valve; 33. a first component tank; 34. an eighth installation tube; 35. a third acid tank; 36. a seventh control valve; 37. a ninth installation tube; 38. an eighth control valve; 39. a second component tank; 40. a new acid liquid storage tank; 41. a ninth control valve; 42. a first drainage tube; 43. a second circulation pump; 44. a third circulation pump; 45. a second drainage tube; 46. a tenth control valve; 47. an eleventh control valve; 48. a third drainage tube; 49. a twelfth control valve; 50. a thirteenth control valve; 51. a fourteenth control valve; 52. a fourth circulation pump; 53. a fifteenth control valve; 54. a fourth drainage tube; 55. a sixteenth control valve; 56. a fifth drainage tube; 57. a fifth circulation pump; 58. a seventeenth control valve; 59. an eighteenth control valve; 60. a third component tank; 61. a nineteenth control valve; 62. a new acid liquor transfer tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, an embodiment of the present invention is provided: a strip steel pickling device capable of rapidly changing the concentration of pickling solution comprises a first overflow tank 1, a first pickling tank 2, a first connecting pipe 3, a second connecting pipe 4, a third connecting pipe 5, a second overflow tank 6, a second pickling tank 7, a fourth connecting pipe 8, a fifth connecting pipe 9, a sixth connecting pipe 10, a third overflow tank 11, a third pickling tank 12, a seventh connecting pipe 13, an eighth connecting pipe 14, a ninth connecting pipe 15, a fourth overflow tank 16, a first mounting pipe 17, a second mounting pipe 18, a first control valve 19, a first acid tank 20, a third mounting pipe 21, a first circulating pump 22, a second control valve 23, a fourth mounting pipe 24, a fifth mounting pipe 25, a third control valve 26, a fourth control valve 27, a second acid tank 28, a fifth control valve 29, a sixth mounting pipe 30, a seventh mounting pipe 31, a sixth control valve 32, a first component tank 33, an eighth mounting pipe 34, a third acid tank 35, a seventh control valve 36, a ninth mounting pipe 37, an eighth control pipe 38, a eighth control valve 38, a second circulating pump 40, a fifth circulating pump 48, a fifteenth control valve 48, a seventeenth valve 58, a fifth circulating pump 48, a sixteenth valve 46, a fifth circulating pump 58, a sixteenth valve 60, a drain valve 46, a fifth control valve 51, a drain valve 51, a seventeenth pump 58, a drain valve 46, a fifth control valve 46, a drain valve 51, a fifth control valve 46, a first acid tank 2, a second overflow tank 6, a second acid tank 7, a third overflow tank 11, a third acid tank 12 and a fourth overflow tank 16 are sequentially arranged on one side of the first overflow tank 1, the first overflow tank 1 is fixedly connected with a first installation tube 17, one end of a first connecting tube 3 and one end of a second connecting tube 4 are fixedly connected with the first acid tank 2, one end of a third connecting tube 5 is fixedly connected with the second overflow tank 6, the other end of the third connecting tube 5 is fixedly connected with the first installation tube 17, the first installation tube 17 is fixedly connected with a first acid tank 20, the other end of the first connecting tube 3 is fixedly connected with the third connecting tube 5, the first acid tank 20 is fixedly connected with a first circulating pump 22 through a third installation tube 21, one end of a second installation tube 18 is fixedly connected with the first acid tank 20, a first control valve 19 is arranged on the second installation tube 18, the other end of the second installation tube 18 is fixedly connected with the second connecting tube 4, the other end of the second connecting tube 4 is fixedly connected with an outlet end of a fifth circulating pump 57, meanwhile, a seventeenth control valve 58 is arranged on the second connecting pipe 4, the connection part of the second mounting pipe 18 and the second connecting pipe 4 is positioned between the seventeenth control valve 58 and the fifth circulating pump 57, the second mounting pipe 18 is fixedly connected with the first component tank 33 through a first matching pipe, an eighteenth control valve 59 is arranged on the first component tank 33, the connection part of the first matching pipe and the second mounting pipe 18 is positioned between the first control valve 19 and the connection part of the second mounting pipe 18 and the second connecting pipe 4, the suction end of the fifth circulating pump 57 is fixedly connected with one end of the fifth mounting pipe 25, the other end of the fifth mounting pipe 25 is fixedly connected with the first acid tank 20, the fifth mounting pipe 25 is provided with a fourth control valve 27 and the second control valve 23, the fourth control valve 27 is positioned at one side close to the fifth circulating pump 57, the fifth installation tube 25 is fixedly connected to the first component tank 33 through a second matching tube, meanwhile, a third control valve 26 is arranged on the second matching tube, the connection part of the fifth installation tube 25 and the second matching tube is positioned between the second control valve 23 and the fourth control valve 27, one end of the fourth installation tube 24 is fixedly connected to the first acid tank 20, the other end of the fourth installation tube 24 is fixedly connected to the second acid tank 28, one end of the fifth drainage tube 56 is fixedly connected to the second acid tank 28, the other end of the fifth drainage tube 56 is fixedly connected to the second overflow tank 6, one end of the fourth connection tube 8 and one end of the fifth connection tube 9 are fixedly connected to the second acid tank 7, one end of the sixth connection tube 10 is fixedly connected to the third overflow tank 11, and the other end of the sixth connection tube 10 is fixedly connected to the fifth drainage tube 56, the other end of the fourth connecting pipe 8 is fixedly connected to the sixth connecting pipe 10, the other end of the fifth connecting pipe 9 is fixedly connected to the outlet end of the fourth circulating pump 52, a nineteenth control valve 61 is arranged on the fifth connecting pipe 9, one end of a sixth mounting pipe 30 is fixedly connected to the suction end of the fourth circulating pump 52, the other end of the sixth mounting pipe 30 is fixedly connected to the second acid tank 28, a fourteenth control valve 51 and a fifth control valve 29 are arranged on the sixth mounting pipe 30, the fourteenth control valve 51 is positioned at one side close to the fourth circulating pump 52, one end of a fourth drainage pipe 54 is fixedly connected to the second acid tank 28, the other end of the fourth drainage pipe 54 is fixedly connected to the fifth connecting pipe 9, the joint of the fourth drainage pipe 54 and the fifth connecting pipe 9 is positioned between the nineteenth control valve 61 and the fourth circulating pump 52, one end of the fourth drainage pipe 54 is provided with a sixteenth control valve 55, the fourth drainage tube 54 is fixedly connected with the second component tank 39 through a third matching tube, a fifteenth control valve 53 is arranged on the third matching tube, the joint of the third matching tube and the fourth drainage tube 54 is positioned between a sixteenth control valve 55 and the joint of the fourth drainage tube 54 and the fifth connection tube 9, meanwhile, the sixth installation tube 30 is fixedly connected with the second component tank 39 through the fourth matching tube, meanwhile, the fourth matching tube is provided with a sixth control valve 32, the joint of the fourth matching tube and the sixth installation tube 30 is positioned between a fifth control valve 29 and a fourteenth control valve 51, one end of a seventh installation tube 31 is fixedly connected with the second acid tank 28, the other end of the seventh installation tube 31 is fixedly connected with the third acid tank 35, one end of the second drainage tube 45 is fixedly connected with the third acid tank 35, the other end of the second drainage tube 45 is fixedly connected with the third overflow tank 11, one end of a seventh connecting pipe 13 and one end of an eighth connecting pipe 14 are fixedly connected to the third acid tank 12 respectively, one end of a ninth connecting pipe 15 is fixedly connected to the fourth overflow tank 16, the other end of the ninth connecting pipe 15 is fixedly connected to the second drainage pipe 45, the other end of the seventh connecting pipe 13 is fixedly connected to the ninth connecting pipe 15, the other end of the eighth connecting pipe 14 is fixedly connected to the outlet end of the second circulating pump 43, an eleventh control valve 47 is arranged on the eighth connecting pipe 14, the suction end of the second circulating pump 43 is fixedly connected to one end of a ninth installation pipe 37, the other end of the ninth installation pipe 37 is fixedly connected to the third acid tank 35, a ninth control valve 41 and a seventh control valve 36 are arranged on the ninth installation pipe 37, the eleventh control valve 47 is positioned on one side close to the second circulating pump 43, one end of the third drainage pipe 48 is fixedly connected to the third acid tank 35, the other end of the third drainage tube 48 is fixedly connected to the eighth connecting tube 14, the connection between the third drainage tube 48 and the eighth connecting tube 14 is located between the eleventh control valve 47 and the second circulating pump 43, one end of the third drainage tube 48 is provided with a thirteenth control valve 50, meanwhile, the third drainage tube 48 is fixedly connected with a third component tank 60 through a fifth matching tube, the fifth matching tube is provided with a twelfth control valve 49, the connection between the fifth matching tube and the third drainage tube 48 is located between the thirteenth control valve 50 and the connection between the third drainage tube 48 and the eighth connecting tube 14, the ninth installation tube 37 is fixedly connected with a third component tank 60 through a sixth matching tube, meanwhile, the sixth matching tube is provided with an eighth control valve 38, the connection between the eighth control valve 38 and the ninth installation tube 37 is located between the seventh control valve 36 and the ninth control valve 41, one end of the eighth installation tube 34 is fixedly connected to the third acid tank 35, the other end of the eighth installation tube 34 is fixedly connected to the new acid tank 40, the eighth installation tube 34 is connected with the third component tank 62 is fixedly connected to the third drainage tube 42, and the third pump 42 is fixedly connected to the third drainage tube 42, and the third pump 44 is fixedly connected to the third drainage tube 42 is located between the third pump 42 and the third control valve 42.
Referring to fig. 3, an embodiment of the present invention is provided: the use method of the strip steel pickling equipment capable of rapidly changing the concentration of pickling solution comprises the following steps of firstly, stopping; step two, refluxing; step three, acid washing; step four, acid separation; step five, supplementing; step six, adjusting;
in the first step, when the strip steel pickling device is in a stop state, the strip steel stops advancing, the strip steel advances in the direction from the first overflow groove 1 to the pickling process, the pickling process is finished from the fourth overflow groove 16, and the strip steel stops advancing, namely, the pickling process is stopped, the pickling is completely returned to the first acid tank 20, the second acid tank 28 and the third acid tank 35, and the first acid tank 20, the second acid tank 28 and the third acid tank 35The retention amount of the acid liquor in the middle and the inner parts is 30m respectively 3 While the concentration of the acid solution free acid in the third overflow tank 11 is 140g/L, while the seventeenth control valve 58, the nineteenth control valve 61, the eleventh control valve 47, the third control valve 26, the first control valve 19, the sixth control valve 32, the sixteenth control valve 55, the eighth control valve 38 and the thirteenth control valve 50 are closed, the second control valve 23, the eighteenth control valve 59, the fifth control valve 29, the fifteenth control valve 53, the seventh control valve 36, the fourth control valve 27, the fourteenth control valve 51, the ninth control valve 41 and the twelfth control valve 49 are opened during the back-in, and then the fifth circulation pump 57, the fourth circulation pump 52 and the second circulation pump 43 are opened;
In the second step, with the fifth circulation pump 57, the fourth circulation pump 52, and the second circulation pump 43 turned on, the acid solution in the first acid tank 20 flows back into the first component tank 33 through the fifth installation pipe 25, the acid solution in the second acid tank 28 flows back into the second component tank 39 through the sixth installation pipe 30, and the acid solution in the third acid tank 35 flows back into the third component tank 60 through the ninth installation pipe 37;
in the third step, the acid retention amounts in the first acid tank 20, the second acid tank 28 and the third acid tank 35 are 15m each 3 The eighteenth control valve 59, the fifteenth control valve 53 and the twelfth control valve 49 may be closed so that the acid solution does not enter the first, second and third component tanks 33, 39 and 60 any more, then the seventeenth, nineteenth and eleventh control valves 58, 61 and 47 are opened, at this time, the acid solution in the first acid tank 20 flows into the first acid tank 2 through the fifth mounting pipe 25 and the second connecting pipe 4, the acid solution in the second acid tank 28 flows into the second acid tank 7 through the sixth mounting pipe 30 and the fifth connecting pipe 9, the acid solution in the third acid tank 35 flows into the third acid tank 12 through the ninth mounting pipe 37 and the eighth connecting pipe 14, and after the acid solution in the first, second and third acid tanks 2, 7 and 12 is fully flowed, the full acid solution flows into the first, second, third and fourth overflow tanks 11 and 16, and the acid solution in the first tank 1 flows into the first overflow pipe 17, the first overflow tank 20, the third overflow tank 5 and the fifth overflow tank 6 through the third overflow pipe 5 in real time 56 into the second acid tank 28, the acid liquor in the third overflow tank 11 flows into the third acid tank 35 in real time through the sixth connecting pipe 10 and the second drainage pipe 45, and meanwhile, the acid liquor in the fourth overflow tank 16 flows into the third acid tank 35 in real time through the ninth connecting pipe 15, so that an acid liquor working cycle is formed, and then the strip steel can be subjected to acid washing treatment;
in the fourth step, the acid solution in the first acid tank 20 is first injected into the first component tank 33 for 15m 3 I.e. the acid in the first acid tank 20 is changed from 30m 3 Reduced to 15m 3 The method comprises the steps of carrying out a first treatment on the surface of the Then the acid solution in the second acid tank 28 is injected into the second component tank 39 for 15m 3 I.e. the acid in the second acid tank 28 is changed from 30m 3 Reduced to 15m 3 The method comprises the steps of carrying out a first treatment on the surface of the Finally, the acid liquor in the third acid tank 35 is injected into the third component tank 60 for 15m 3 I.e. the acid liquor in the third acid tank 35 is changed from 30m 3 Reduced to 15m 3
In the fifth step, the regenerated acid solution is transported to the new acid solution transfer tank 62 by a regeneration technology, the new acid solution storage tank 40 and the third acid tank 35 are respectively subjected to acid supply treatment by the new acid solution transfer tank 62, the concentration of the new acid solution in the new acid solution transfer tank 62 is 190g/L, and the flow rate of the new acid solution in the new acid solution transfer tank 62 flowing into the third acid tank 35 is 9m 3 After the fresh acid solution flows into the fresh acid solution storage tank 40, the third circulating pump 44 and the tenth control valve 46 are opened, the fresh acid solution in the fresh acid solution storage tank 40 flows into the third acid tank 35 through the first drainage tube 42, and the fresh acid solution with the concentration of 190g/L is 6m 3 The flow rate of/h enters the third acid tank 35, since the third acid tank 35 is connected with the second acid tank 28 through the seventh mounting tube 31, and the second acid tank 28 is connected with the first acid tank 20 through the fourth mounting tube 24, the second acid tank 28 and the first acid tank 20 are respectively replenished with new acid liquid in the process of replenishing the third acid tank 35, the acid liquid in the first acid tank 20 can be discharged to the acid regeneration room through the third mounting tube 21 and the first circulating pump 22, and in the process of replenishing the new acid liquid in the third acid tank 35, the new acid liquid transfer tank 62 and the new acid liquid storage tank 40 are used for jointly supplying the acid treatment to the third acid tank 35, so thatThe total flow rate of the fresh acid solution flowing into the third acid tank 35 was 15m 3 And/h, while the outflow rate of the acid solution passing through the first acid tank 20 through the third installation pipe 21 and the first circulation pump 22 is 15m 3 /h;
In the sixth step, when the concentration of the free acid in the third acid tank 35 is adjusted, the concentration calculation formula is calculated according to:
N1·V1+N2·V2=N3·V3
V1+V2=N3·V3
The following steps are obtained: t=v2· (N3-N2)/(N1-N3)/(FL)
Wherein N1 is the concentration of the new acid solution; n2 is the concentration of the original acid liquor; n3 is the concentration of the acid liquor after being changed; v1 is the volume of the new acid liquor; v2 is the volume of the original acid liquor; v3 is the volume of the acid liquor after being changed; t is the time required by the concentration change of the acid liquor; FL is the flow rate of make-up fresh acid; by detecting the required data, the time required for the concentration adjustment is calculated according to the concentration calculation formula, that is, the concentration of the free acid in the third acid tank 35 is adjusted to 170g/L; it is known that: n1 is 190g/L; n2 is 140g/L;
n3 is 170g/L; FL1 is 9m 3 /h; FL2 is 6m 3 /h; v2 is 15m 3 The method comprises the steps of carrying out a first treatment on the surface of the According to the following: t=v2×n3-N2)/(N1-N3)/(FL); the following steps are obtained: t=v2×1.5++fl=15m 3 ×1.5÷15m 3 H=1.5 hours; i.e. 15m by the method of the invention 3 Flow rate of cascade acid replacement per hour and 15m for each acid tank 3 The concentration of the free acid in the third acid tank 35 was increased from 140g/L to 170g/L for 1.5 hours.
In summary, it can be seen that the time t required for adding the new acid solution is positive with the size of V2, and the larger V2 is, the longer the time is consumed; the smaller V2 is, the shorter the time-consuming; inversely proportional to the FL size, the larger the FL the shorter the time consuming; the smaller the FL the longer the time consuming. The principle of the invention is as follows: on one hand, the retention amount V2 of the acid liquor is reduced; on the other hand, the flow rate FL of the acid liquid replacement is increased to shorten the time for concentration adjustment.
Based on the above, the invention has the advantages that, firstly, a new acid liquid storage tank 40 is added, and the capability of supplying new acid liquid to the acid washing system is increased; 2. the first, second and third component tanks 33, 39, 60 are added to reduce the inventory of circulating pickling solution when it is desired to increase the concentration of the system circulating pickling solution, thereby increasing the speed of the circulating pickling solution.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (2)

1. The utility model provides a belted steel pickling equipment that can change pickling solution concentration fast, includes first overflow launder (1), fourth connecting pipe (8), fifth connecting pipe (9), sixth connecting pipe (10), seventh connecting pipe (13), eighth connecting pipe (14), ninth connecting pipe (15), third installation tube (21), fourth installation tube (24) and fifth installation tube (25), its characterized in that: one side of the first overflow trough (1) is sequentially provided with a first acid trough (2), a second overflow trough (6), a second acid trough (7), a third overflow trough (11), a third acid trough (12) and a fourth overflow trough (16), a first installation pipe (17) is fixedly connected to the first overflow trough (1), one end of a first connection pipe (3) and one end of a second connection pipe (4) are fixedly connected to the first acid trough (2), one end of a third connection pipe (5) is fixedly connected to the second overflow trough (6), the other end of the third connection pipe (5) is fixedly connected to the first installation pipe (17), the first installation pipe (17) is fixedly connected to the first acid tank (20), the other end of the first connection pipe (3) is fixedly connected to the third connection pipe (5), the first acid tank (20) is fixedly connected with a first circulating pump (22) through a third installation pipe (21), one end of a second installation pipe (18) is fixedly connected to the first acid tank (20), the other end of the second connection pipe (18) is fixedly connected to a fifth circulating pump (57) is fixedly connected to the other end of the second connection pipe (18) and the second connection pipe (19) is fixedly connected to the second connection pipe (4), meanwhile, a seventeenth control valve (58) is arranged on the second connecting pipe (4), the connection part of the second mounting pipe (18) and the second connecting pipe (4) is positioned between the seventeenth control valve (58) and the fifth circulating pump (57), the second mounting pipe (18) is fixedly connected with a first component tank (33) through a first matching pipe, an eighteenth control valve (59) is arranged on the first component tank (33), the connection part of the first matching pipe and the second mounting pipe (18) is positioned between the first control valve (19) and the connection part of the second mounting pipe (18) and the second connecting pipe (4), the suction end of the fifth circulating pump (57) is fixedly connected with one end of a fifth mounting pipe (25), the other end of the fifth mounting pipe (25) is fixedly connected with the first acid tank (20), the fourth control valve (27) and the second control valve (23) are arranged on the fifth mounting pipe (25), the fourth control valve (27) is positioned on one side close to the fifth circulating pump (57), the fifth control valve (27) is fixedly connected with the fifth mounting pipe (25) through the second matching pipe (25), and the fifth control valve (27) is arranged on the fifth mounting pipe (25);
One end of a fourth installation tube (24) is fixedly connected to the first acid tank (20), the other end of the fourth installation tube (24) is fixedly connected to the second acid tank (28), one end of a fifth drainage tube (56) is fixedly connected to the second acid tank (28), the other end of the fifth drainage tube (56) is fixedly connected to the second overflow groove (6), one end of a fourth connecting tube (8) and one end of a fifth connecting tube (9) are fixedly connected to the second acid tank (7), one end of a sixth connecting tube (10) is fixedly connected to the third overflow groove (11), the other end of the sixth connecting tube (10) is fixedly connected to the fifth drainage tube (56), the other end of the fourth connecting tube (8) is fixedly connected to the sixth connecting tube (10), the other end of the fifth connecting tube (9) is fixedly connected to the outlet end of the fourth circulating pump (52), and a nineteenth control valve (61) is arranged on the fifth connecting tube (9);
one end of a sixth installation tube (30) is fixedly connected to the suction end of the fourth circulating pump (52), the other end of the sixth installation tube (30) is fixedly connected to the second acid tank (28) at the same time, a fourteenth control valve (51) and a fifth control valve (29) are arranged on the sixth installation tube (30), the fourteenth control valve (51) is located at one side close to the fourth circulating pump (52), one end of a fourth drainage tube (54) is fixedly connected to the second acid tank (28), the other end of the fourth drainage tube (54) is fixedly connected to the fifth connecting tube (9), and meanwhile, the joint of the fourth drainage tube (54) and the fifth connecting tube (9) is located between the nineteenth control valve (61) and the fourth circulating pump (52);
A sixteenth control valve (55) is arranged at one end of the fourth drainage tube (54), the fourth drainage tube (54) is fixedly connected with a second component tank (39) through a third matching tube, a fifteenth control valve (53) is arranged on the third matching tube, the joint of the third matching tube and the fourth drainage tube (54) is positioned between the sixteenth control valve (55) and the joint of the fourth drainage tube (54) and the fifth connecting tube (9), meanwhile, the sixth installation tube (30) is fixedly connected onto the second component tank (39) through the fourth matching tube, meanwhile, a sixth control valve (32) is arranged on the fourth matching tube, and the joint of the fourth matching tube and the sixth installation tube (30) is positioned between the fifth control valve (29) and the fourteenth control valve (51);
one end of a seventh installation tube (31) is fixedly connected to the second acid tank (28), the other end of the seventh installation tube (31) is fixedly connected to the third acid tank (35), one end of a second drainage tube (45) is fixedly connected to the third acid tank (35), the other end of the second drainage tube (45) is fixedly connected to the third overflow groove (11), one ends of a seventh connecting tube (13) and an eighth connecting tube (14) are respectively fixedly connected to the third acid groove (12), one end of a ninth connecting tube (15) is fixedly connected to the fourth overflow groove (16), the other end of the ninth connecting tube (15) is fixedly connected to the second drainage tube (45), and meanwhile, the other end of the seventh connecting tube (13) is fixedly connected to the ninth connecting tube (15);
The other end of the eighth connecting pipe (14) is fixedly connected to the outlet end of the second circulating pump (43), meanwhile, an eleventh control valve (47) is arranged on the eighth connecting pipe (14), the suction end of the second circulating pump (43) is fixedly connected with one end of a ninth installation pipe (37), the other end of the ninth installation pipe (37) is fixedly connected to the third acid tank (35), meanwhile, the ninth installation pipe (37) is provided with a ninth control valve (41) and a seventh control valve (36), the eleventh control valve (47) is positioned on one side close to the second circulating pump (43), one end of a third drainage pipe (48) is fixedly connected to the third acid tank (35), the other end of the third drainage pipe (48) is fixedly connected to the eighth connecting pipe (14), and the joint of the third drainage pipe (48) and the eighth connecting pipe (14) is positioned between the eleventh control valve (47) and the second circulating pump (43);
one end of the third drainage tube (48) is provided with a thirteenth control valve (50), meanwhile, the third drainage tube (48) is fixedly connected with a third component tank (60) through a fifth matching tube, a twelfth control valve (49) is arranged on the fifth matching tube, and meanwhile, the joint of the fifth matching tube and the third drainage tube (48) is positioned between the thirteenth control valve (50) and the joint of the third drainage tube (48) and the eighth connecting tube (14);
The third component tank (60) is fixedly connected to the ninth installation tube (37) through a sixth matching tube, meanwhile, the eighth control valve (38) is arranged on the sixth matching tube, the joint of the eighth control valve (38) and the ninth installation tube (37) is located between the seventh control valve (36) and the ninth control valve (41), one end of the eighth installation tube (34) is fixedly connected to the third acid tank (35), the other end of the eighth installation tube (34) is fixedly connected to the new acid liquid storage tank (40), the new acid liquid transfer tank (62) is connected to the eighth installation tube (34), meanwhile, one end of the first drainage tube (42) is fixedly connected to the new acid liquid storage tank (40), the other end of the first drainage tube (42) is fixedly connected to the third acid tank (35), and the tenth control valve (46) and the third circulating pump (44) are arranged on the first drainage tube (42), and meanwhile, the tenth control valve (46) is located between the third circulating pump (44) and the joint of the first drainage tube (42) and the third acid tank (35).
2. The use method of the strip steel pickling equipment capable of rapidly changing the concentration of pickling solution comprises the following steps of firstly, stopping; step two, refluxing; step three, acid washing; step four, acid separation; step five, supplementing; step six, adjusting; the method is characterized in that:
wherein in the first step, when the strip steel pickling device is in a stop state, the strip steel stops advancing, and the advancing direction of the strip steel starts to enter acid from the first overflow groove (1) The pickling process is finished from the fourth overflow groove (16), and in the process that the strip steel stops advancing, namely, the pickling process stops, the pickling is completely returned into the first acid tank (20), the second acid tank (28) and the third acid tank (35), and the acid liquor in the first acid tank (20), the second acid tank (28) and the third acid tank (35) is respectively kept in an amount of 30m 3 At the same time, the concentration of the acid liquor free acid in the third overflow tank (11) is 140g/L, and in the process of the acid washing returning, a seventeenth control valve (58), a nineteenth control valve (61), an eleventh control valve (47), a third control valve (26), a first control valve (19), a sixth control valve (32), a sixteenth control valve (55), an eighth control valve (38) and a thirteenth control valve (50) are closed, a second control valve (23), an eighteenth control valve (59), a fifth control valve (29), a fifteenth control valve (53), a seventh control valve (36), a fourth control valve (27), a fourteenth control valve (51), a ninth control valve (41) and a twelfth control valve (49) are opened, and then a fifth circulation pump (57), a fourth circulation pump (52) and a second circulation pump (43) are opened;
in the second step, as the fifth circulating pump (57), the fourth circulating pump (52) and the second circulating pump (43) are opened, the acid liquid in the first acid tank (20) flows back to the first component tank (33) through the fifth mounting pipe (25), the acid liquid in the second acid tank (28) flows back to the second component tank (39) through the sixth mounting pipe (30), and the acid liquid in the third acid tank (35) flows back to the third component tank (60) through the ninth mounting pipe (37);
In the third step, when the acid liquid in the first acid tank (20), the second acid tank (28) and the third acid tank (35) is kept at 15m 3 The eighteenth control valve (59), the fifteenth control valve (53) and the twelfth control valve (49) can be closed so that the acid liquid does not enter the first component tank (33), the second component tank (39) and the third component tank (60) any more, then the seventeenth control valve (58), the nineteenth control valve (61) and the eleventh control valve (47) are opened, at this time, the acid liquid in the first acid tank (20) flows into the first acid tank (2) through the fifth installation tube (25) and the second connecting tube (4), the acid liquid in the second acid tank (28) flows into the second acid tank (7) through the sixth installation tube (30) and the fifth connecting tube (9), and the acid liquid in the third acid tank (35) flows into the eighth connecting tube (14) through the ninth installation tube (37)After the acid liquor in the first acid tank (2), the second acid tank (7) and the third acid tank (12) flows fully, the fully flowing acid liquor flows into the first overflow tank (1), the second overflow tank (6), the third overflow tank (11) and the fourth overflow tank (16), the acid liquor in the first overflow tank (1) flows into the first acid tank (20) through the first mounting pipe (17) in real time, the acid liquor in the second overflow tank (6) flows into the second acid tank (28) through the third connecting pipe (5) and the fifth drainage pipe (56) in real time, the acid liquor in the third overflow tank (11) flows into the third acid tank (35) through the sixth connecting pipe (10) and the second drainage pipe (45) in real time, and the acid liquor in the fourth overflow tank (16) flows into the third acid tank (35) through the ninth connecting pipe (15) in real time, so that an acid liquor working cycle is formed, and then acid pickling treatment can be performed;
In the fourth step, the acid solution in the first acid tank (20) is injected into the first component tank (33) for 15m 3 Namely, the acid liquor in the first acid tank (20) is changed from 30m 3 Reduced to 15m 3 The method comprises the steps of carrying out a first treatment on the surface of the Then the acid liquor in the second acid tank (28) is injected into the second component tank (39) for 15m 3 Namely, the acid liquor in the second acid tank (28) is formed by 30m 3 Reduced to 15m 3 The method comprises the steps of carrying out a first treatment on the surface of the Finally, the acid liquor in the third acid tank (35) is injected into the third component tank (60) for 15m 3 Namely, the acid liquor of the third acid tank (35) is formed by 30m 3 Reduced to 15m 3
In the fifth step, the regenerated acid liquor is transported to a new acid liquor transfer tank (62) by a regeneration technology, the new acid liquor transfer tank (62) is used for respectively carrying out acid supply treatment on a new acid liquor storage tank (40) and a third acid tank (35), the concentration of the new acid liquor in the new acid liquor transfer tank (62) is 190g/L, and the flow rate of the new acid liquor in the new acid liquor transfer tank (62) flowing into the third acid tank (35) is 9m 3 After flowing into the new acid tank (40), opening a third circulating pump (44) and a tenth control valve (46), and flowing the new acid in the new acid tank (40) into the third acid tank (35) through the first drainage tube (42), wherein the new acid with the concentration of 190g/L is 6m 3 The flow rate of/h enters the third acid tank (35), and the second acid is connected with the third acid tank (35) and the second acid tank (28) through a seventh mounting tube (31) The tank (28) is connected with the first acid tank (20) through a fourth mounting pipe (24), so that in the process of replenishing the third acid tank (35) with new acid liquid, the second acid tank (28) and the first acid tank (20) are replenished with new acid liquid respectively, the acid liquid in the first acid tank (20) can be discharged to an acid regeneration room through the third mounting pipe (21) and the first circulating pump (22), and in the process of replenishing the third acid tank (35) with new acid liquid, the new acid liquid transfer tank (62) and the new acid liquid storage tank (40) are used for jointly carrying out acid supply treatment on the third acid tank (35), so that the total flow rate of the new acid liquid which actually flows into the third acid tank (35) is 15m 3 And/h, the outflow rate of the acid solution passing through the first acid tank (20) through the third installation tube (21) and the first circulating pump (22) is 15m 3 /h;
In the sixth step, when the concentration of the free acid in the third acid tank (35) is adjusted, the concentration calculation formula is used:
N1·V1+N2·V2=N3·V3
V1+V2=N3·V3
the following steps are obtained:
t=V2·(N3-N2)÷(N1-N3)÷FL
wherein N1 is the concentration of the new acid solution; n2 is the concentration of the original acid liquor; n3 is the concentration of the acid liquor after being changed; v1 is the volume of the new acid liquor; v2 is the volume of the original acid liquor; v3 is the volume of the acid liquor after being changed; t is the time required by the concentration change of the acid liquor; FL is the flow rate of make-up fresh acid; the time required for the adjustment of the density is calculated from the density calculation formula by detecting the required data.
CN202210701060.0A 2022-06-20 2022-06-20 Strip steel pickling equipment capable of rapidly changing concentration of pickling solution and application method thereof Active CN115044916B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190067462A (en) * 2017-12-07 2019-06-17 주식회사 포스코 Pickling Device and Pickling Method
CN211921709U (en) * 2020-03-20 2020-11-13 本钢板材股份有限公司 Strip steel continuous hydrochloric acid washing device for realizing acid tank liquid level balance
CN113136584A (en) * 2021-04-01 2021-07-20 本钢板材股份有限公司 Cold-rolled strip steel pickling production line
CN113584497A (en) * 2021-07-23 2021-11-02 中冶南方工程技术有限公司 Strip steel pickling device and method
CN217579080U (en) * 2022-06-20 2022-10-14 本钢板材股份有限公司 Strip steel pickling equipment capable of quickly changing concentration of pickling solution

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190067462A (en) * 2017-12-07 2019-06-17 주식회사 포스코 Pickling Device and Pickling Method
CN211921709U (en) * 2020-03-20 2020-11-13 本钢板材股份有限公司 Strip steel continuous hydrochloric acid washing device for realizing acid tank liquid level balance
CN113136584A (en) * 2021-04-01 2021-07-20 本钢板材股份有限公司 Cold-rolled strip steel pickling production line
CN113584497A (en) * 2021-07-23 2021-11-02 中冶南方工程技术有限公司 Strip steel pickling device and method
CN217579080U (en) * 2022-06-20 2022-10-14 本钢板材股份有限公司 Strip steel pickling equipment capable of quickly changing concentration of pickling solution

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