CN112301357A - Automatic control stainless steel tank type circulating closed pickling system - Google Patents
Automatic control stainless steel tank type circulating closed pickling system Download PDFInfo
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- CN112301357A CN112301357A CN202010919784.3A CN202010919784A CN112301357A CN 112301357 A CN112301357 A CN 112301357A CN 202010919784 A CN202010919784 A CN 202010919784A CN 112301357 A CN112301357 A CN 112301357A
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- C—CHEMISTRY; METALLURGY
- C23—COATING 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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Abstract
The invention discloses an automatic control stainless steel tank type circulating closed pickling system, which comprises a circulating pickling device, an intelligent control device and a pickling absorption and purification device, wherein the circulating pickling device comprises a circulating tank and a circulating tank; the circulating pickling device comprises a pickling tank and an acid storage tank, a heating tank is connected between the pickling tank and the acid storage tank, acid liquor in the acid storage tank enters the pickling tank after being heated by the heating tank, a cover body which is opened or closed by a hydraulic device is arranged on the pickling tank, and acid mist air outlets are formed in the cover body and the pickling tank; the intelligent control device is in control connection with the variable frequency motor to control the acid feeding speed and the acid feeding amount of the acid liquor; the acid washing absorption and purification device comprises a fan, an exhaust gas treatment part and an exhaust part, wherein the fan collects acid mist discharged from an acid mist outlet and discharges the acid mist through the exhaust part after the acid and alkali neutralization through the exhaust gas treatment part. Through the mode, the automatic control stainless steel tank type circulating closed pickling system disclosed by the invention has the advantages that the automation degree is high, the manual operation is reduced, the acid mist generated in the pickling process can be effectively absorbed, and the influence on the environment is reduced.
Description
Technical Field
The invention relates to the field of steel pipe pickling equipment, in particular to an automatic control stainless steel tank type circulating closed pickling system.
Background
The method of removing scale and rust on the surface of steel by using acid solution is called pickling, which is a pretreatment or intermediate treatment process of electroplating, enameling, rolling and other processes.
The oxide film on the surface of the steel pipe needs to be removed by using pickling equipment in the production process of the seamless steel pipe, a pickling solution reacts with the steel pipe in the pickling process to release a large amount of acid gas, the pickling gas threatens the health of workers if not processed, the existing pickling equipment is provided with a gas collecting device, but the collecting effect is poor, and the gas is only collected and is not processed in time, part of the gas leaks in the collecting device, so that the labor condition is worsened, the concentration of the pickling solution can be reduced after the pickling solution is used for a period of time, the pickling requirement cannot be met, the existing pickling equipment is lack of a waste liquid recycling device, the low-concentration pickling solution can waste resources if not recycled, the environment can be influenced, and the practicability of the pickling equipment is reduced.
Disclosure of Invention
The invention mainly solves the technical problem of providing an automatic control stainless steel tank type circulating closed pickling system which has high automation degree, reduces manual operation, can effectively absorb acid mist generated in the pickling process and reduces the influence on the environment.
In order to solve the technical problems, the invention adopts a technical scheme that: the automatic control stainless steel tank type circulating closed pickling system comprises a circulating pickling device, an intelligent control device and a pickling absorption and purification device; the circulating pickling device comprises a pickling tank for pickling stainless steel pipes and an acid storage tank for storing acid liquor, wherein the acid storage tank is communicated with a hydrofluoric acid tank and a nitric acid tank and is used for adding the acid liquor, a heating tank is connected between the pickling tank and the acid storage tank, the acid liquor in the acid storage tank is fed into the heating tank through a variable frequency motor driving hydraulic pump and then enters the pickling tank after being heated, a cover body which is opened or closed through a hydraulic device is arranged on the pickling tank, an acid mist air outlet is formed in the cover body and the pickling tank, a valve for adjusting the opening size of the acid mist air outlet is arranged on the acid mist air outlet, a cover plate is arranged on the upper side of the air outlet, an air suction cavity is formed between the cover plate and the air outlet, the acid mist is sucked out through a pickling absorption and purification device, after the stainless steel pipes are hung in the pickling tank, the, when the set liquid level is reached, the liquid level meter sends a signal, and the intelligent control device reduces the speed of the frequency converter, so that the pickling solution runs under the circulating working condition; purification device is absorbed in pickling includes frequency conversion fan, exhaust-gas treatment portion and exhaust portion, the frequency conversion fan is collected acid mist air outlet discharge acid mist to discharge through exhaust-gas treatment portion through the exhaust portion after acid-base neutralization, exhaust-gas treatment portion includes the exhaust-gas treatment case, exhaust-gas treatment incasement portion has the recovery pond, exhaust-gas treatment incasement portion still is connected with the hydrojet nest of tubes, the hydrojet nest of tubes passes through lye pump and lye pond intercommunication, alkali lye in the lye pond passes through the lye pump and carries out acid-base neutralization with the acid mist in the exhaust-gas treatment case from the hydrojet pipe blowout. The intelligent control device realizes dynamic display of acid mist purification, acid liquor circulation and heating, the real-time position of a cover body of the pickling tank, the state of an acid discharge valve, air suction quantity, a PH value in the tower, a liquid level state, an exhaust PH indicating value and the like, and the technological parameter setting, the real-time monitoring, the fault and the overrun alarm of the flow quantity, the heating temperature and the PH indicating value of the pickling solution.
In a preferred embodiment of the invention, the acid storage tank, the heating tank and the hydraulic pump input the acid liquor into the pickling tank through the acid inlet pipe, an acid outlet pipe is connected between the pickling tank and the acid storage tank, the acid liquor after being pickled in the pickling tank flows back to the acid storage tank through the acid outlet pipe, and a steam type heating coil is arranged in the heating device to heat the acid liquor, so that the temperature of the acid liquor is controlled within the range of 60 +/-2.5 ℃.
In a preferred embodiment of the invention, the right side of the pickling tank is also provided with a quick acid discharging device, the acid liquor in the pickling tank is discharged into an acid storage tank through the quick acid discharging device, the low liquid level of the pickling tank enters the acid liquor, and the high liquid level of the pickling tank discharges the acid liquor.
In a preferred embodiment of the invention, the PH value of the acid-base concentration meter of the alkali liquor pool is 9-14, before the acid-washing absorption purification device is started, water is added into the alkali liquor pool, alkali liquor is added, when the upper limit HP value of the water acid-base concentration meter is set, the alkali liquor pump is started, and spraying and filling are started to spray liquor.
In a preferred embodiment of the present invention, the liquid ejecting pipe group includes a plurality of liquid ejecting pipes arranged at intervals in series in a vertical direction.
In a preferred embodiment of the present invention, when the PH of the lye pool is lower than 9, the solution adding system is started to supplement the lye to the upper limit value set by the PH.
In a preferred embodiment of the invention, the set value of the PH value concentration meter of the exhaust part is 7, and when the PH value of the exhaust is higher than the set value, the upper industrial personal computer automatically controls the rotating speed of the variable frequency fan and the addition amount of the alkali liquor.
In a preferred embodiment of the invention, the intelligent control device comprises an upper industrial personal computer, configuration software of the upper industrial personal computer displays a system flow chart, corresponding flow setting, real-time monitoring and historical data recording of each specification pipe blank, a PLC (programmable logic controller) of the upper industrial personal computer adjusts the rotating speed of a hydraulic pump through a variable frequency motor so as to control the flow of acid liquor sucked into the pickling tank, and the intelligent control device controls the pressure in the pickling tank through a pressure execution element so as to adjust the height of the liquid level in the pickling tank.
The invention has the beneficial effects that: the automatic control stainless steel tank type circulating closed pickling system has the advantages that the automation degree is high, the manual operation is reduced, the acid mist generated in the pickling process can be effectively absorbed, and the influence on the environment is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic diagram of a preferred embodiment of an automatically controlled stainless steel tank-type circulating closed pickling system of the present invention;
FIG. 2 is a schematic view of the structure of a cyclic pickling apparatus;
the parts in the drawings are numbered as follows: 1. the device comprises a circulating pickling device, 11, a pickling tank, 12, an acid storage tank, 13, a heating tank, 14, a hydraulic pump, 15, a cover body, 16, a hydraulic device, 17, an acid mist air outlet, 18, an acid outlet pipe, 19, a heating pipe, 21, an acid inlet pipe, 22, a valve, 23, a flowmeter, 2, an intelligent control device, 24, a variable frequency motor, 25, an upper industrial personal computer, 251, configuration software, 252, a PLC (programmable logic controller), 3, a pickling absorption and purification device, 31, a fan, 32, an air suction pipe, 33, a waste gas treatment box, 34, a liquid spraying pipe group, 35, a recovery tank, 36, an alkaline liquid tank, 37, an alkaline liquid pump, 38, an exhaust pipe, 39, a chimney, 4, a hydrofluoric acid tank, 5, a nitric acid tank, 6, a quick acid discharge valve, 7, a quick acid discharge pipe, 8, a tower, 9 and a stair.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an automatic control stainless steel tank type circulation closed pickling system comprises a circulation pickling device 1, an intelligent control device 2 and a pickling absorption purification device 3;
the circulating pickling device 1 comprises a pickling tank 11 for pickling the stainless steel pipe and an acid storage tank 12 for storing acid liquor, a heating tank 13 is connected between the pickling tank 11 and the acid storage tank 12, the acid liquor in the acid storage tank 12 drives a hydraulic pump 14 through a variable frequency motor 20 to send the acid liquor into the heating tank 13 for heating and then enters the pickling tank 11, the acid liquor is heated to about 60 ℃ under the action of a heating pipe of the heating tank, the heated acid liquor is absorbed in the pickling tank 11 by the hydraulic pump 14, a cover body 15 which is opened or closed through a hydraulic device 16 is arranged on the pickling tank 11, and an acid mist air outlet 17 is formed in the cover body 15 and the pickling tank 11; the hydraulic control pickling tank switch cover body is adopted, the vector frequency converter is used for driving the motor and the constant delivery pump, the automatic switch of the pickling tank cover body 15 is realized, and the manual labor is greatly reduced. An acid liquor circulating system with controllable flow and flow speed is utilized, a vector frequency converter is adopted to drive a motor and a constant delivery pump, and a speed regulating valve in a traditional oil way is omitted. And the upper industrial personal computer gives a signal to adjust the frequency of the frequency converter so as to control the flow of the hydraulic pump.
The intelligent control device 2 is in control connection with the variable frequency motor 20 to control the acid feeding speed and the acid feeding amount of the acid liquor;
the pickling absorption purification 3 device comprises a fan 31, an exhaust gas treatment part 32 and an exhaust part 33, wherein the fan collects acid mist discharged from an acid mist outlet 17, and the acid mist is neutralized by acid and alkali through the exhaust gas treatment part 32 and then discharged through the exhaust part 33. The upper limit of the alkali concentration was set to pH14, and the lower limit was set to pH 9. Before the acid mist purification treatment device works, the water adding electric valve is opened, the valve is automatically closed when the set value is reached (a liquid level switch), liquid caustic soda is added until the PH value in the purification tower reaches 14 (a spray pump is started to fully mix water and liquid caustic soda), and a liquid caustic soda adding system is closed; the tank type circulating pickling system can be started according to the program only when the spraying pump and the variable frequency fan are started. When the PH value reaches a set value of 10, a display screen on a computer automatically warns, and an alarm alarms at the same time; when the PH value reaches 9, the alkali adding system is started to supplement alkali liquor to the upper limit value, and when the water level is lower than the lowest set water level, the liquid level meter sends a signal and the water adding valve is automatically opened; opening a drain valve regularly to drain saturated solution in the acid mist purification tower into a sewage treatment mixing tank; the PH value of the PH value concentration meter on the exhaust part is set to be 7, when the exhaust PH value exceeds the set indicating value, the rotating speed of the induced air variable frequency motor and the addition amount of alkali liquor are automatically adjusted, and the exhaust waste gas in the exhaust funnel is ensured to meet the requirement of environmental protection standard
In addition, the acid storage tank 12, the heating tank 13 and the hydraulic pump 14 input the acid solution into the acid storage tank 11 through the acid inlet pipe 21, an acid outlet pipe 18 is connected between the acid storage tank 12 and the acid storage tank 11, and the acid solution after acid washing in the acid storage tank 11 flows back to the acid storage tank 12 through the acid outlet pipe 18. The acid liquor in the acid storage tank 12 is sucked into the acid washing tank 11 again through the hydraulic pump 14, the heating tank 13 and the acid inlet pipe 21, so that the circular acid washing is realized, and the resources are saved.
In addition, a quick acid discharging device 19 is arranged on the right side of the pickling tank 11, and the acid liquor in the pickling tank 11 is discharged into the acid storage tank 12 through the quick acid discharging valve 6 and the quick acid discharging pipe 7 of the quick acid discharging device 19. After the acid washing is completed, the acid liquid can be quickly discharged into the acid storage tank 12. The quick acid discharge device 8 is provided with two valves, so that acid liquor can be prevented from flowing back to the pickling tank 11, and greater pollution is caused. In case of emergency, the acid liquor in the pickling tank 11 can be quickly discharged into the acid storage tank 12 through the quick acid discharge device 19, so that the acid liquor is prevented from flowing outwards, and the emergency is worsened. The pickling bath is formed by 25mm polyvinyl chloride plates in a splicing mode, the inner side of the pickling bath is of a plate type structure, and cross reinforcing ribs with the intervals of 400-500 mm are arranged on the outer side of the pickling bath. The length is generally 15.5m, and the specifications are 20.5m, 25.5m and the like, the groove width is 1.2m, and the height is 1.6 m. The side wall and the bottom are both provided with reinforcing ribs with the width of 200mm, and the reinforcing ribs are arranged at intervals of 400-500 mm in a cross manner. The upper part is provided with a flat elongated upper air suction opening and a flat elongated lower air suction opening, the upper part is externally provided with a cover plate to form an air suction cavity, the lower part is externally provided with an adjusting valve connected with an air suction pipeline hose, the outer side of the pickling tank is provided with a stainless steel structure to ensure the integral rigidity of the pickling tank, and protective facilities such as a walking board, a guardrail and the like are arranged around the pickling tank.
The integral opening and closing device on the pickling tank comprises an integral stainless steel structure cover body, a turnover mechanism, a hydraulic system, an electrical system and the like. The hydraulic system comprises a pump, a hydraulic module, a vane pump, a motor, an oil tank, a turnover hydraulic cylinder and the like, wherein the hydraulic module comprises an overflow valve, a reversing valve and other execution elements, and the whole hydraulic system is controlled electrically. The integral steel structure cover body is a steel structure integral structure welded by stainless steel plates and stainless steel pipes, has certain rigidity, and is not deformed when the cover body is opened and closed. The turnover mechanism is of a hinge structure, one end of the turnover mechanism is fixed on the side wall of the pickling tank, and the other end of the turnover mechanism is fixed on the cover body and is opened by a turnover hydraulic cylinder.
In addition, the acid mist air outlets 17 are uniformly arranged on the cover body 15 and the side surface of the pickling tank 11 at intervals, and valves for adjusting the size of the openings of the acid mist air outlets are arranged on the acid mist air outlets 17. In the pickling process, because different pipe blanks are different in length, the positions and the concentrations of acid mist generated in the pickling process are different. The size of the air outlet can be adjusted through the valve, so that the acid mist can be comprehensively and uniformly absorbed into the acid mist absorption and purification system.
An acid mist air outlet is arranged at the upper side in the pickling tank, a valve is arranged at the joint of the outer side and the pipeline, manual valves are arranged at the outer sides of sectional air cavities (with the interval of 800-1000 mm) from the side of an air suction pipeline to the tail end, and the switching value of each air door section is manually adjusted in sequence, so that the air suction in each section from the air suction pipeline to the tail end of the pickling tank is basically kept consistent.
In addition, the intelligent control device 2 comprises an upper industrial personal computer, configuration software of the upper industrial personal computer displays a system flow chart, corresponding flow setting, real-time monitoring and historical data recording of pipe blanks of various specifications, a PLC (programmable logic controller) of the upper industrial personal computer adjusts the rotating speed of the hydraulic pump through the variable frequency motor to control the flow of acid liquor sucked into the pickling tank, and the intelligent control device controls the pressure in the pickling tank through the pressure execution element to adjust the height of the liquid level in the pickling tank. The intelligent control system controlled by the PLC and the configuration software can ensure the pressure in the pickling tank through the pressure executing element, and can automatically control and adjust the height of the acid liquor in the pickling tank along with the change of various specifications of group distances. The upper industrial personal computer realizes dynamic display of a system flow chart, setting of corresponding flows of pipe blanks of various specifications, real-time monitoring and historical data recording through configuration software, and the PLC has the functions of real-time flow control monitoring, fault detection alarming and the like, and can observe all control signals, control states and alarming information in the pickling process in real time. The upper industrial personal computer can adjust the valve position opening of the flow control of the acid liquor to the pipe blank with the specified specification through the PLC, so that the acid liquor can be reasonably circulated in the pickling tank, and the pickling of the pipe blank meets the standard requirement. The PLC configuration and programming software package are completed in an off-line state and then are downloaded to the controller as a complete file through a serial port of a computer, so that the functions of pressure loss, acid liquor flow control detection, fault detection alarm and the like are realized. The pressure in the pickling tank can be ensured by the pressure executing element, and the height of the acid liquid in the pickling tank can be automatically controlled and adjusted along with the change of various specifications of group distances. The whole control system can be automatically opened and closed according to actual working conditions. The upper industrial personal computer and the configuration software can comprehensively and dynamically display the dynamic process flow of the operation rolling process, and realize pressure loss, dynamic monitoring, fault detection, alarming, fault diagnosis, system maintenance and the like.
The acid washing circulation and heating system consists of an acid storage pool, a connecting pipeline, an acid-proof pump, a variable frequency motor, a heating device, an acid discharging electric valve and a pipeline system. After the stainless steel pipe is hung into the pickling tank, the acid-proof pump is started, the pickling solution is output to the maximum flow through full power, when the set liquid level is reached, the liquid level meter sends a signal, the speed is reduced through the frequency converter, and the pickling solution is enabled to run under the circulating working condition. Set up heating device on pipeline, for acid-proof type polyvinyl chloride bucket formula structure, set up steam type heating coil in, heat acidizing fluid, set up temperature sensor, electric valve, electromagnetic flowmeter etc. in the system, make acidizing fluid control in 60 ℃ +/-2.5 ℃ within range, the opposite side returns sour pipeline and returns to in the pickling bath of storing up through flowing automatically, pickling bath one side low level in the pickling bath advances, the higher authority of the opposite side goes out, keeps continuously flowing, has improved pickling efficiency.
The capacities of the acid storage tank and the pickling tank are set, when the new pickling solution is prepared, the water adding amount of the corresponding volume is set, the electric valve is opened to add water, the hydrofluoric acid and nitric acid adding pump is started according to the concentration requirement of the pickling process, the hydrofluoric acid and nitric acid are added according to the corresponding proportion through the flow meter, and the new acid adding operation is completed when the on-line PH meter indication value reaches 0. When the on-line PH meter limit is 3, the addition of hydrofluoric acid and nitric acid can be done manually or automatically in proportion.
The bottom of descaling bath has 1% inclination, and the minimum sets up quick row pickling solution electrically operated valve (the during operation is closed condition), and after the pickling was accomplished, the acid-resistant circulating pump stopped, electronic acid solution valve of putting was opened, the pickling solution in the descaling bath passes through quick row of sour device and discharges in the acid storage pool. The upper cover plate of the pickling tank is automatically opened, and the pipe is hoisted out.
The intelligent control system comprises an upper industrial personal computer and configuration software, and can dynamically display the flow charts of the system for displaying acid mist purification, acid liquor circulation and heating, the real-time position of the cover body of the pickling tank, the state of the acid discharge valve and the like. The method is characterized by comprising the following steps of setting process parameters such as air suction volume, PH value in the tower, liquid level state, exhaust PH indication value and the like, pickling solution flow, heating temperature, PH indication value and the like, monitoring in real time, alarming for faults and overrun, and the like, and can be used for setting, monitoring in real time and recording historical data according to corresponding processes of various specifications of pipe blanks. The lower PLC programmable logic controller meets the analog and digital control of each system, and realizes the functions of acid mist purification, various parameter control detection, overrun, fault alarm and the like.
The exhaust gas treatment unit 32 includes an exhaust gas treatment tank 34, a recovery tank 35 is provided in the exhaust gas treatment tank 34, a liquid spray tube group 36 is further connected to the exhaust gas treatment tank 34, the liquid spray tube group 36 is communicated with an alkaline liquid tank 38 via an alkaline liquid pump 37, and the alkaline liquid in the alkaline liquid tank 38 is sprayed from the liquid spray tube 36 via the alkaline liquid pump 37 to neutralize the acid mist in the exhaust gas treatment tank 34 with the acid.
In addition, the liquid ejection tube group 36 includes a plurality of liquid ejection tubes arranged at intervals in the vertical direction in series.
Further, a plurality of exhaust gas treatment tanks 34 communicating with each other are provided in sequence between the fan 31 and the exhaust section 33, and the acid mist discharged from the pickling tank 11 is subjected to multistage acid-base neutralization reaction by the plurality of exhaust gas treatment tanks 34 and then discharged through the exhaust section. Take out the inside acid mist of pickling bath 12 through fan 31, utilize communicating pipe to let in acid mist first exhaust-gas treatment case 34, utilize the inside alkali lye of first exhaust-gas treatment case 34 and acid mist to carry out acid-base neutralization reaction, the waste liquid that the reaction generated falls into the recovery pond 35 of first exhaust-gas treatment case 34 bottom, the acid mist of complete reaction gets into second exhaust-gas treatment case 34 through communicating pipe, react with alkali lye once more, the waste liquid that the reaction generated falls into the recovery pond of second exhaust-gas treatment case 34 bottom, can rationally set up the different exhaust-gas treatment case 34 of quantity according to acid mist absorption efficiency, later with the gas process that purifies the chimney again. This acid mist absorbs clean system prevents greatly that the acid mist from leaking and influencing workman's is healthy, has improved the exhaust-gas treatment effect of pickling installation, has increased this pickling installation's practicality. The acid mist absorption and purification system for purifying acid mist for many times and achieving the effects of energy conservation and emission reduction realizes recycling and environment-friendly emission of the acid mist, greatly prevents the leakage of the acid mist from influencing the health of workers, improves the waste gas treatment effect of the pickling equipment, and increases the practicability of the pickling equipment.
Different from the prior art, the automatic control stainless steel tank type circulating closed pickling system has the advantages that the automation degree is high, manual operation is reduced, acid mist generated in the pickling process can be effectively absorbed, and the influence on the environment is reduced.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An automatic control stainless steel tank type circulating closed pickling system is characterized by comprising a circulating pickling device, an intelligent control device and a pickling absorption and purification device;
the circulating pickling device comprises a pickling tank for pickling stainless steel pipes and an acid storage tank for storing acid liquor, wherein the acid storage tank is communicated with a hydrofluoric acid tank and a nitric acid tank and is used for adding the acid liquor, a heating tank is connected between the pickling tank and the acid storage tank, the acid liquor in the acid storage tank is fed into the heating tank through a variable frequency motor driving hydraulic pump and then enters the pickling tank after being heated, a cover body which is opened or closed through a hydraulic device is arranged on the pickling tank, an acid mist air outlet is formed in the cover body and the pickling tank, a valve for adjusting the opening size of the acid mist air outlet is arranged on the acid mist air outlet, a cover plate is arranged on the upper side of the air outlet, an air suction cavity is formed between the cover plate and the air outlet, the acid mist is sucked out through a pickling absorption and purification device, after the stainless steel pipes are hung in the pickling tank, the, when the set liquid level is reached, the liquid level meter sends a signal, and the intelligent control device reduces the speed of the frequency converter, so that the pickling solution runs under the circulating working condition;
the pickling absorption and purification device comprises a variable frequency fan, a waste gas treatment part and an exhaust part, wherein the variable frequency fan collects acid mist discharged from an acid mist outlet and discharges the acid mist through the exhaust part after the acid-base neutralization by the waste gas treatment part, the waste gas treatment part comprises a waste gas treatment box, a recovery tank is arranged in the waste gas treatment box, a liquid spraying pipe set is also connected in the waste gas treatment box and is communicated with an alkali liquor pool through an alkali liquor pump, and alkali liquor in the alkali liquor pool is sprayed out from a liquid spraying pipe through the alkali liquor pump and is neutralized with acid mist in the waste gas treatment box;
the intelligent control device realizes dynamic display of acid mist purification, acid liquor circulation and heating, the real-time position of a pickling tank cover body, the state of an acid discharge valve, the air suction amount, the PH value in the tower, the liquid level state, the exhaust PH indicating value and the like, and technological parameter setting, real-time monitoring, fault and overrun alarming of the flow rate, the heating temperature and the PH indicating value of the pickling solution;
the automatic control stainless steel groove type circulation closed pickling system is characterized in that alkali liquor and water are added into a pickling absorption and purification device in proportion, a variable frequency fan is started, a stainless steel pipe is hoisted to enter a pickling tank, a cover body is closed, pickling time is set, a hydraulic pump is started, the acid liquor is heated and then enters the pickling tank, after pickling is completed, the hydraulic pump is closed, the stainless steel pipe is hoisted out, and acid mist is discharged into the pickling absorption and purification device to complete pickling process circulation.
2. The automatic control stainless steel tank type circulation closed pickling system of claim 1, wherein the acid storage tank, the heating tank and the hydraulic pump input acid liquor into the pickling tank through an acid inlet pipe, an acid outlet pipe is further connected between the pickling tank and the acid storage tank, the acid liquor after pickling in the pickling tank flows back to the acid storage tank through the acid outlet pipe, a steam type heating coil is arranged in the heating device and heats the acid liquor, and the temperature of the acid liquor is controlled within the range of 60 +/-2.5 ℃.
3. The automatic control stainless steel tank type circulation closed pickling system as claimed in claim 2, wherein a quick acid discharge device is further arranged on the right side of the pickling tank, acid liquor in the pickling tank is discharged into the acid storage tank through the quick acid discharge device, the low liquid level of the pickling tank enters the acid liquor, and the high liquid level of the pickling tank discharges the acid liquor.
4. The automatic control stainless steel tank type circulation closed pickling system of claim 3, wherein a PH set value of an acid-base concentration meter of the alkali liquid tank is 9-14, water and alkali liquid are added into the alkali liquid tank before the pickling absorption purification device is started, and when an upper limit HP value of the water acid-base concentration meter is set, an alkali liquid pump is started to spray and fill the spraying liquid.
5. The automatically controlled stainless steel tank-type circulating closed pickling system of claim 4, wherein the spray pipe group comprises a plurality of spray pipes arranged at intervals in the vertical direction.
6. The automatic control stainless steel tank type circulation closed pickling system of claim 5, wherein when the pH value of the alkali liquor tank is lower than 9, the liquid adding system is started to supplement alkali liquor to the upper limit value set by the pH value.
7. The automatic control stainless steel tank type circulation closed pickling system of claim 6, wherein a set value of a PH value concentration meter of the exhaust part is 7, and when the PH value of the exhaust is higher than the set value, an upper industrial personal computer automatically controls the rotating speed of a variable frequency fan and the addition amount of alkali liquor.
8. The automatic control stainless steel slot type circulation closed pickling system as claimed in any one of claims 1 to 7, wherein the intelligent control device comprises an upper industrial personal computer, configuration software of the upper industrial personal computer displays a system flow chart, corresponding flow setting, real-time monitoring and historical data recording of each specification tube blank, a PLC (programmable logic controller) of the upper industrial personal computer adjusts the rotating speed of a hydraulic pump through a variable frequency motor so as to control the flow of acid liquor sucked into the pickling tank, and the intelligent control device controls the pressure in the pickling tank through a pressure execution element so as to adjust the height of the liquid level in the pickling tank.
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| CN202010919784.3A CN112301357A (en) | 2020-09-04 | 2020-09-04 | Automatic control stainless steel tank type circulating closed pickling system |
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| CN202010919784.3A CN112301357A (en) | 2020-09-04 | 2020-09-04 | Automatic control stainless steel tank type circulating closed pickling system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110055544A (en) * | 2019-05-23 | 2019-07-26 | 重庆钢铁(集团)有限责任公司 | Vertical steel pipe descaling bath |
| CN113026026A (en) * | 2021-03-01 | 2021-06-25 | 广东嘉元科技股份有限公司 | Pickling solution flow control system, pickling solution flow control method, foil forming machine and copper foil production method |
| CN113144870A (en) * | 2021-05-19 | 2021-07-23 | 苏尼特金曦黄金矿业有限责任公司 | Gold detection tail gas and tail liquid purification and recovery process based on optimized milling and leaching |
| CN114672815A (en) * | 2022-04-20 | 2022-06-28 | 天津航天长征火箭制造有限公司 | Automatic pickling process for small-diameter stainless steel guide pipe of carrier rocket |
| CN114774939A (en) * | 2022-04-26 | 2022-07-22 | 清远楚江铜业有限公司 | Environment-friendly copper strips pickling installation |
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| CN115520917A (en) * | 2021-10-27 | 2022-12-27 | 泰州威绿环保科技有限公司 | Wastewater pollution treatment system for stainless steel product centralized cleaning workshop |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110055544A (en) * | 2019-05-23 | 2019-07-26 | 重庆钢铁(集团)有限责任公司 | Vertical steel pipe descaling bath |
| CN113026026A (en) * | 2021-03-01 | 2021-06-25 | 广东嘉元科技股份有限公司 | Pickling solution flow control system, pickling solution flow control method, foil forming machine and copper foil production method |
| CN113144870A (en) * | 2021-05-19 | 2021-07-23 | 苏尼特金曦黄金矿业有限责任公司 | Gold detection tail gas and tail liquid purification and recovery process based on optimized milling and leaching |
| CN115520917A (en) * | 2021-10-27 | 2022-12-27 | 泰州威绿环保科技有限公司 | Wastewater pollution treatment system for stainless steel product centralized cleaning workshop |
| CN115520917B (en) * | 2021-10-27 | 2024-01-23 | 泰州威绿环保科技有限公司 | Wastewater pollution treatment system of stainless steel product centralized cleaning workshop |
| CN114672815A (en) * | 2022-04-20 | 2022-06-28 | 天津航天长征火箭制造有限公司 | Automatic pickling process for small-diameter stainless steel guide pipe of carrier rocket |
| CN114774939A (en) * | 2022-04-26 | 2022-07-22 | 清远楚江铜业有限公司 | Environment-friendly copper strips pickling installation |
| CN114774939B (en) * | 2022-04-26 | 2023-12-22 | 清远楚江高精铜带有限公司 | Environment-friendly copper strip pickling equipment |
| CN115418651A (en) * | 2022-08-11 | 2022-12-02 | 河南宏旺金属材料有限公司 | Stainless steel band cleaning and pre-degreasing device and using method thereof |
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