WO2021218185A1 - 一种节能环保带钢电解酸洗系统 - Google Patents

一种节能环保带钢电解酸洗系统 Download PDF

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Publication number
WO2021218185A1
WO2021218185A1 PCT/CN2020/136490 CN2020136490W WO2021218185A1 WO 2021218185 A1 WO2021218185 A1 WO 2021218185A1 CN 2020136490 W CN2020136490 W CN 2020136490W WO 2021218185 A1 WO2021218185 A1 WO 2021218185A1
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Prior art keywords
tank
electrolyte
scrubbing
circulation tank
acid mist
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PCT/CN2020/136490
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English (en)
French (fr)
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贾鸿雷
廖砚林
李素珍
黎浩
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中冶南方工程技术有限公司
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Publication of WO2021218185A1 publication Critical patent/WO2021218185A1/zh

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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
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/06—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
    • C25F7/02—Regeneration of process liquids

Definitions

  • the utility model belongs to the technical field of surface treatment of metallurgical plates and strips, and specifically relates to an energy-saving and environmentally-friendly strip steel electrolytic pickling system.
  • Electrolytic pickling relies on electrochemical action to dissolve the oxide scale, which is a common oxide scale pickling process.
  • the rinsing and scrubbing process at the end of the electrolysis process will affect the cleaning effect when the electrolyte concentration in the medium exceeds the standard after a certain amount of strip steel is processed, and water needs to be supplemented; the electrolysis mist contains a certain amount of mist containing chromium ions and acid, which requires acid to meet the emission requirements in the national standard
  • the mist purification system is used for processing, and this system also needs to be supplemented with water.
  • the water supply of the electrolysis system requires the use of desalinated water, because if the concentration of corrosive ions such as Cl-in the new water exceeds the standard, it will cause pitting corrosion on the electrode plate. Under the promotion of electrolysis, the electrode plate will accelerate the corrosion.
  • desalinated water is relatively expensive, industrial water is used in the electrolytic acid mist purification system. After the acid mist is washed, the waste liquid is directly discharged to the waste liquid pit, which also causes the waste of industrial water and the increase of water treatment costs.
  • the purpose of the utility model is to provide an energy-saving and environmentally-friendly strip steel electrolytic pickling system, which can at least solve the above-mentioned defects of the conventional electrolytic pickling process.
  • the technical scheme of the utility model is to provide an energy-saving and environment-friendly strip steel electrolytic pickling system, which includes an electrolytic tank, an electrolyte circulation tank, a scrubbing tank, a scrubbing circulation tank, an acid mist purification tower and an electrolyte purification device.
  • the electrolyte circulation tank Arranged side-by-side with the scrubbing tank, the electrolyte circulation tank forms a closed loop with the liquid outlet and the liquid inlet of the electrolytic tank through the liquid inlet line one and the liquid outlet line 1, respectively, the scrubbing circulation tank passes through the liquid inlet line two and
  • the second liquid outlet pipeline forms a closed loop with the liquid outlet and the liquid inlet of the scrubbing tank.
  • the bottoms of the electrolyte circulation tank and the scrubbing circulation tank are both connected to the inlet of the electrolyte purification device through the purification pipeline 1.
  • the electrolyte purification device The liquid outlet is connected to the liquid inlet of the electrolyte circulation tank through the purification pipeline 2.
  • the acid mist outlets of the electrolysis tank, the electrolyte circulation tank, the scrubbing tank and the scrubbing circulation tank are all connected to the acid mist purification through the acid mist pipeline
  • the inlet of the tower, the lower part of the acid mist purification tower is externally connected with a water supply pipeline, and the bottom liquid outlet of the acid mist purification tower is connected to the upper part of the acid mist purification tower through an external circulation pipeline, and the circulation pipeline is provided with an acid mist purification cycle Pump, the top of the acid mist purification tower is connected to the exhaust chimney through an exhaust pipe.
  • an injection pipeline is provided at the bottom of the electrolytic tank.
  • an electrolyte heat exchanger is connected to the outlet pipeline of the electrolyte circulation tank.
  • the condensed water outlet of the electrolyte heat exchanger is connected with the water supplement pipeline of the acid mist purification tower, and the condensed water of the electrolyte heat exchanger is used as the supplement water of the acid mist purification tower.
  • the circulation pipeline of the acid mist purification tower is connected to the liquid inlet of the scrubbing circulation tank through a water supply branch pipe, and the water supply branch pipe is provided with a control valve one.
  • the second liquid outlet pipeline of the scrubbing circulation tank is connected to the liquid inlet of the electrolyte circulation tank through the second water supply branch pipe, and the second water supply branch pipe is provided with a second control valve.
  • the exhaust pipe of the acid mist purification tower is provided with a mist exhaust fan and a mist separator, and the condensate outlet of the mist separator is connected to the liquid inlet of the acid mist purification tower.
  • the electrolyte circulation tank is located below the electrolytic tank, and the electrolyte in the electrolytic tank overflows into the first liquid inlet pipeline, and the first liquid outlet pipeline of the electrolyte circulation tank is provided with an electrolyte circulation pump.
  • the scrubbing circulation tank is located below the scrubbing tank, and the liquid outlet of the scrubbing tank is located at the bottom of the scrubbing tank. Brush the circulating pump.
  • the electrolyte purification device is located above the electrolyte circulation tank, and the electrolyte purified by the electrolyte purification device returns to the electrolyte circulation tank by its own weight.
  • the energy-saving and environmentally-friendly strip steel electrolytic pickling system provided by the utility model is provided with a spray pipeline at the bottom of the electrolytic tank, which can prevent the sediment produced in normal production from being deposited and overflow to the electrolyte circulation tank, and at the same time, it will contain
  • the electrolyte and scrubbing solution of acid mud are transported to the electrolyte purification device for purification treatment, which can avoid the accumulation of sediments into acid mud.
  • pipelines and equipment will not be damaged or affect production due to clogging.
  • the electrolysis efficiency is improved, and the life of the electrode plate can be increased by 2 to 4 times.
  • the energy-saving and environmentally-friendly strip steel electrolytic pickling system provided by the utility model uses steam generated by the waste heat of the furnace area to heat the electrolyte to ensure the temperature requirements of the electrolytic pickling process and save production energy costs.
  • the energy-saving and environmentally friendly strip steel electrolytic pickling system uses the circulating water in the acid mist purification tower to replenish the scrubbing circulation tank.
  • the scrubbing water is circulated to a saturated concentration, it is transported to the electrolyte circulation tank to make up for the electrolyte.
  • the loss caused by evaporation effectively avoids the waste of acid mist purification, scrubbing, and electrolysis systems, and the discharging of waste liquid and the configuration of new circulating media, which cause a large amount of waste of energy media; at the same time, during normal production, only new water is added to the acid mist purification system, and finally After purification, the waste liquid containing a certain amount of electrolyte flows into the electrolysis system, and is reused, which greatly saves energy media and reduces production costs.
  • Figure 1 is a schematic diagram of the structure of the energy-saving and environmentally-friendly strip steel electrolytic pickling system of the present invention.
  • Electrolytic tank 1. Electrolytic tank; 2. Electrolyte purification device; 3. Spray pipeline; 4. Liquid inlet line one; 5. Electrolyte heat exchanger; 6. Scrubbing tank; 7. Liquid inlet line two; 8. Acid mist pipeline; 9. Mist exhaust fan; 10. Exhaust pipeline; 11. Mist separator; 12. Exhaust chimney; 13. Purification pipeline; 14. Electrolyte circulation tank; 15. Electrolysis Liquid circulation pump; 16. Outlet pipeline one; 17. Purification pipeline one; 18. Make-up branch pipe two; 19. Control valve two; 20. Scrub circulation pump; 21. Outlet pipeline two; 22. Scrub circulation tank; 23 , Water supply branch pipe one; 24, control valve one; 25, acid mist purification circulating pump; 26, circulating pipeline; 27, acid mist purification tower; 28, water supply pipeline.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features; in the description of the present invention, unless otherwise specified, the meaning of "multiple” It is two or more.
  • this embodiment provides an energy-saving and environmentally-friendly strip steel electrolytic pickling system, which includes an electrolytic tank 1, an electrolyte circulation tank 14, a scrubbing tank 6, a scrubbing circulation tank 22, an acid mist purification tower 27, and an electrolyte. Purification device 2.
  • the electrolytic tank 1 and the scrubbing tank 6 are arranged side by side.
  • the electrolytic tank 1 contains the electrolyte. After the strip passes through the electrolytic tank 1 for electrolysis, it is sent to the scrubbing tank 6 for scrubbing. There are multiple actual electrolysis requirements.
  • electrolyte circulation tanks 14 are also provided, corresponding to the electrolytic tank 1 one-to-one; in this process, the electrolyte circulation tank 14 passes through the liquid inlet pipe 4 and the liquid outlet respectively.
  • the pipeline 16 forms a closed loop with the liquid outlet and the liquid inlet of the electrolytic cell 1.
  • an injection pipe 3 is provided at the bottom of the electrolytic cell 1, so that the electrolyte in the electrolytic cell 1 is in a flowing state, thereby making the electrolysis
  • the sediment produced by normal production in tank 1 is not deposited, and the electrolyte is emptied from the electrolytic tank 1 to the electrolyte circulation tank 14 during shutdown, and there is no considerable acid sludge in the electrolytic tank 1.
  • the scrubbing circulation tank 22 forms a closed loop with the liquid outlet and the liquid inlet of the scrubbing tank 6 through the liquid inlet line 2 7 and the liquid outlet pipeline 2 21 respectively; the bottoms of the electrolyte circulation tank 14 and the scrubbing circulation tank 22 both pass through Purification pipeline 17 is connected to a delivery pump, and the delivery pump transports the electrolyte to the inlet of the electrolyte purification device 2, and the outlet of the electrolyte purification device 2 is connected to the electrolyte circulation tank 14 through the purification pipeline 13 At the liquid inlet, the purified electrolyte is returned to the electrolyte circulation tank 14 through the purification pipeline 2 13 and the scrubbing solution containing a certain electrolyte can be transported to the electrolyte circulation tank 14, which can make up for the electrolyte caused by evaporation.
  • Water loss can also be used to recover part of the electrolyte.
  • the sediment and sludge generated after the pickling of the electrolysis system can be removed by the electrolyte purification device 2, which can prevent the sediment from accumulating into acid sludge, and the pipelines and equipment will not be blocked due to However, it damages itself or affects production. There is no deposit on the surface of the electrode plate, which improves the electrolysis efficiency and delays the corrosion of the electrode plate.
  • the electrolyte purification device 2 can be filter press, suction filtration, centrifugal filtration and other filtration methods;
  • the acid mist outlets of the electrolytic tank 1, the electrolyte circulation tank 14, the scrubbing tank 6 and the scrubbing circulation tank 22 are all connected to the air inlet of the acid mist purification tower 27 through the acid mist pipeline 8, the electrolytic tank 1, the electrolyte circulation tank 14.
  • the acid mist condensed water produced by the scrubbing tank 6 and scrubbing circulation tank 22 are all returned to the acid mist purification tower 27 to ensure that the strong oxidizing property and acid ion concentration in the discharged acid mist are within the qualified range, and the acid mist is purified at the same time
  • the lower part of the tower 27 is connected with a water supply pipe 28.
  • fresh water desalted water/condensed water
  • the fresh water is mixed with the refluxed acid mist condensate to purify the acid mist.
  • the liquid outlet at the bottom of the tower 27 is connected to the upper part of the acid mist purification tower 27 through an external circulation pipeline 26.
  • the circulation pipeline 26 is provided with an acid mist purification circulation pump 25.
  • the acid mist purification circulation pump 25 removes the bottom of the acid mist purification tower 27.
  • the mixed liquid is sent to the upper part of the acid mist purification tower 27 for circulating purification, and when the circulating water reaches a certain concentration, it can be reused as electrolysis make-up water.
  • the flue gas generated during the purification process of the acid mist purification tower 27 passes through the exhaust gas connected to the top
  • the pipeline 10 is transported to the exhaust chimney 12 to be discharged.
  • the electrolyte circulation tank 14 can be arranged below the electrolytic tank 1, and the electrolyte in the electrolytic tank 1 overflows into the liquid inlet pipeline 4. Then its own weight flows into the electrolyte circulation tank 14.
  • the outlet line 16 of the electrolyte circulation tank 14 is provided with an electrolyte circulation pump 15 through which the electrolyte in the electrolyte circulation tank 14 is pumped into In the electrolytic cell 1.
  • the scrubbing circulation tank 22 is located below the scrubbing tank 6, and the liquid outlet of the scrubbing tank 6 is located at the bottom of the scrubbing tank 6.
  • the scrubbing water in the scrubbing tank 6 flows to the scrubbing circulation tank 22 by its own weight.
  • the second liquid outlet pipeline 21 is provided with a scrubbing circulation pump 20.
  • the electrolyte purification device 2 is located above the electrolyte circulation tank 14, and the electrolyte after purification by the electrolyte purification device 2 returns to the electrolyte circulation tank 14 by its own weight.
  • an electrolyte heat exchanger 5 is connected to the outlet line 16 of the electrolyte circulation tank 14, and the pair is transported from the electrolyte circulation tank 14 to the electrolyte through the electrolyte heat exchanger 5.
  • the electrolyte in the electrolytic cell 1 is heated, and the heating medium used in this electrolyte heat exchanger 5 is the steam generated by the waste heat of the exhaust gas in the furnace area of the unit.
  • the heating of the furnace area generally starts before production. When the exhaust gas in the furnace area reaches a certain temperature It is enough to use the waste heat boiler to generate steam.
  • the entire steam unit can be self-produced and used without sending steam.
  • the waste heat boiler in the furnace area of the unit is used as the heat source for electrolyte heating, which greatly reduces the cost of production energy consumption.
  • the condensed water outlet of the electrolyte heat exchanger 5 is connected to the collection system through a pipe, and then is pumped to the water make-up pipe 28 of the acid mist purification tower 27, so that the electrolyte heat exchanger 5
  • the condensed water generated during the heat exchange process is used as new water in the acid mist purification tower 27 to be added, which reduces the supply of external new water and saves energy resources.
  • the circulating pipeline 26 of the acid mist purification tower 27 is connected to the liquid inlet of the scrubbing circulation tank 22 through the water replenishment branch pipe 23, and the water replenishment branch pipe 23 is provided with a control Valve one 24, when the circulating water in the acid mist purification tower 27 reaches a certain concentration, open the control valve one 24, the circulating water in the acid mist purification tower 27 is transported to the scrubbing circulation tank 22 through the water supplement branch pipe 23 to realize the scrubbing tank 6's hydration.
  • the liquid outlet pipeline 21 of the scrubbing circulation tank 22 is connected to the liquid inlet of the electrolyte circulation tank 14 through the water supply branch tube 18, and the water supply branch tube 18 is provided with a control valve 19, when the scrubbing cycle When the scrubbing circulating water in the tank 22 reaches a saturated concentration, the control valve 19 is opened, and the scrubbing circulating water in the scrubbing circulating tank 22 is sent to the electrolyte circulating tank 14 through the water supply branch pipe two 18 to make up for the loss caused by the evaporation of the electrolyte.
  • the scrubbing system does not need to discharge the waste liquid according to the production situation, and then re-dosing and new water preparation, avoiding the waste of acid mist purification, scrubbing, electrolysis single system to discharge the waste liquid and the configuration of new circulating media, which causes a large amount of waste of energy media.
  • the purified waste liquid containing a certain amount of electrolyte flows into the electrolyte circulation tank 14, and is reused, which greatly saves energy media.
  • the exhaust pipe 10 of the acid mist purification tower 27 can be provided with a mist exhaust fan 9 and a mist separator 11, and the mist separator 11 further reduces the acid mist content in the exhaust flue gas and reduces air pollution.
  • the condensate outlet of the mist separator 11 is connected to the inlet of the acid mist purification tower 27, and the condensate accumulated in the mist separator 22 is returned to the acid mist purification tower 27 for purification and reuse, which avoids energy media resources. Waste.

Abstract

一种节能环保带钢电解酸洗系统，包括电解槽、电解液循环罐、刷洗槽、刷洗循环罐、酸雾净化塔和电解液净化装置，电解液循环罐与电解槽构成闭环回路，刷洗循环罐与刷洗槽构成闭环回路，电解液循环罐和刷洗循环罐底部均与电解液净化装置的进液口连接，电解液净化装置的出液口连接电解液循环罐的进液口，电解槽、电解液循环罐、刷洗槽和刷洗循环罐的酸雾出口均与酸雾净化塔的进气口连接，酸雾净化塔外接补水管路，酸雾净化塔的底部出液口通过外部的循环管线连接至酸雾净化塔上部。该系统可避免电解沉淀物积聚压实，提高电解效率，同时电解和刷洗系统无需根据生产情况排放废液后，重新加药及新水配液，而造成工艺及能源介质的损失。

Description

一种节能环保带钢电解酸洗系统 技术领域
本实用新型属于冶金板带表面处理技术领域，具体涉及一种节能环保带钢电解酸洗系统。
背景技术
冷轧不锈钢退火过程中表面会生成一层氧化皮，导致带钢耐腐蚀性能下降，表面粗糙度变大，同时，由于氧化皮塑性较差，如果不去除的话，带钢平整时氧化皮很容易发生破裂并被压入金属基体，影响冷轧板的表面质量及加工性能。为满足带钢的表面质量要求，有必要采取表面处理措施将氧化层去除。电解酸洗依靠电化学作用，使氧化皮溶解，是常用的氧化皮酸洗工艺。
然而，常规的电解酸洗工艺过程存在如下问题：
(1)电解酸洗过程中会产生一些金属氧化物沉淀物及含金属元素沉淀物，当生产到一定程度时，沉淀物会积聚成酸泥，酸泥如果不及时去除的话，不但会积累在槽体、罐体、管道低洼及死区处，造成电解液管道堵塞，影响生产，而且会附着在电极板的表面，造成电流分布不均匀并加速电极板的腐蚀。
(2)由于电解酸洗工艺要求的温度一般为75～85℃，此温度下电解质维持较高的活性，并且电解质的溶液度大不易结晶，这需要大量的热源进行加热，增加了生产能耗成本。
(3)电解系统正常生产时由于温度较高，电解质有蒸发现象，常规电解工艺中由于沉淀物的积累定期需要从在线槽底部、电解液循环罐底部排液至废水坑。电解工艺尾部的漂洗及刷洗工艺在处理一定量带钢后介质中电解质浓度超标影响清洗效果，需要补水；电解雾气中含有一定量含铬离子、 酸的雾气，为达到国标中的排放要求需要酸雾净化系统进行处理，而此系统也需要进行补水。
(4)电解系统的补水要求用脱盐水，因为如果新水中的腐蚀性离子如Cl -浓度超标，会对电极板形成点腐蚀作用，在电解作用的促进下，电极板会加速腐蚀。部分常规电解工艺中，因脱盐水相对昂贵，在电解酸雾净化系统中采用工业水，洗涤酸雾后废液直接排至废液坑，也造成了工业水的浪费及水处理成本的增加。
实用新型内容
本实用新型的目的在于提供一种节能环保带钢电解酸洗系统，至少可以解决常规电解酸洗工艺的上述部分缺陷。
本实用新型的技术方案是提供了一种节能环保带钢电解酸洗系统，包括电解槽、电解液循环罐、刷洗槽、刷洗循环罐、酸雾净化塔和电解液净化装置，所述电解槽和刷洗槽并排布置，所述电解液循环罐分别通过进液管线一和出液管线一与电解槽的出液口和进液口构成闭环回路，所述刷洗循环罐分别通过进液管线二和出液管线二与刷洗槽的出液口和进液口构成闭环回路，所述电解液循环罐和刷洗循环罐底部均通过净化管路一连接电解液净化装置的进液口，电解液净化装置的出液口通过净化管路二连接电解液循环罐的进液口，所述电解槽、电解液循环罐、刷洗槽和刷洗循环罐的酸雾出口均通过酸雾管路连接至酸雾净化塔的进气口，所述酸雾净化塔下部外接补水管路，酸雾净化塔的底部出液口通过外部的循环管线连接至酸雾净化塔上部，该循环管线上设有酸雾净化循环泵，所述酸雾净化塔顶部通过排气管路连接至排气烟囱。
进一步的，所述电解槽底部设有喷射管路。
进一步的，所述电解液循环罐的出液管线一上连接有电解液换热器。
进一步的，所述电解液换热器的冷凝水出口与所述酸雾净化塔的补水管路连接，用电解液换热器的冷凝水作为酸雾净化塔的补水。
进一步的，所述酸雾净化塔的循环管线上通过补水支管一连接至所述刷洗循环罐的进液口，且补水支管一上设有控制阀门一。
进一步的，所述刷洗循环罐的出液管线二通过补水支管二连接至所述电解液循环罐的进液口，且补水支管二上设有控制阀门二。
进一步的，所述酸雾净化塔的排气管路上设置有排雾风机和雾滴分离器，且雾滴分离器的冷凝液出口连接酸雾净化塔的进液口。
进一步的，所述电解液循环罐位于电解槽下方，且电解槽内电解液溢流至进液管线一内，所述电解液循环罐的出液管线一上设有电解液循环泵。
进一步的，所述刷洗循环罐位于刷洗槽下方，且刷洗槽的出液口位于刷洗槽底部，刷洗槽内刷洗水自重流至刷洗循环罐，所述刷洗循环罐的出液管线二上设有刷洗循环泵。
进一步的，所述电解液净化装置位于电解液循环罐上方，电解液净化装置净化完后的电解液自重回流至电解液循环罐。
与现有技术相比，本实用新型的有益效果：
(1)本实用新型提供的这种节能环保带钢电解酸洗系统在电解槽槽底设置喷射管路，可以使正常生产产生的沉淀物不沉积，溢流至电解液循环罐，同时将含酸泥的电解液和刷洗液输送至电解液净化装置净化处理，可避免沉淀物积累成酸泥的同时，管道和设备不会因为堵塞而自身损坏或影响生产，电极板表面上没有沉积物，电解效率提高，电极板寿命可提高2～4倍。
(2)本实用新型提供的这种节能环保带钢电解酸洗系统采用炉区废气余热利用产生的蒸汽对电解液进行加热，以保证电解酸洗工艺的温度要求，节约了生产能耗成本。
(3)本实用新型提供的这种节能环保带钢电解酸洗系统利用酸雾净化塔中循环水对刷洗循环罐进行补水，刷洗水循环到饱和浓度时输送至电解液循环罐，以弥补电解液蒸发造成的损失，有效避免了酸雾净化、刷洗、电解单个系统排放废液和配置新循环介质而造成能源介质大量浪费；同时在 正常生产时，只在酸雾净化系统补入新水，最终经过净化、含有一定量电解质的废液流入到电解系统，又重新得到了利用，大幅度的节省了能源介质，降低了生产成本。
以下将结合附图对本实用新型做进一步详细说明。
附图说明
图1是本实用新型节能环保带钢电解酸洗系统的结构示意图。
附图标记说明：1、电解槽；2、电解液净化装置；3、喷射管路；4、进液管线一；5、电解液换热器；6、刷洗槽；7、进液管线二；8、酸雾管路；9、排雾风机；10、排气管路；11、雾滴分离器；12、排气烟囱；13、净化管路二；14、电解液循环罐；15、电解液循环泵；16、出液管线一；17、净化管路一；18、补水支管二；19、控制阀门二；20、刷洗循环泵；21、出液管线二；22、刷洗循环罐；23、补水支管一；24、控制阀门一；25、酸雾净化循环泵；26、循环管线；27、酸雾净化塔；28、补水管路。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本实用新型保护的范围。
在本实用新型的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二” 的特征可以明示或者隐含地包括一个或者更多个该特征；在本实用新型的描述中，除非另有说明，“多个”的含义是两个或两个以上。
如图1所示，本实施例提供了一种节能环保带钢电解酸洗系统，包括电解槽1、电解液循环罐14、刷洗槽6、刷洗循环罐22、酸雾净化塔27和电解液净化装置2，所述电解槽1和刷洗槽6并排布置，电解槽1中盛装电解液，带钢贯穿电解槽1进行电解后，送入刷洗槽6进行刷洗，当然电解槽1的数量可根据实际电解需求设置多个，相应的，电解液循环罐14亦设置多个，与电解槽1一一对应；在此过程中，所述电解液循环罐14分别通过进液管线一4和出液管线一16与电解槽1的出液口和进液口构成闭环回路；优化的，在所述电解槽1底部设有喷射管路3，使电解槽1中电解液处于流动状态，进而使得电解槽1中正常生产产生的沉淀物不沉积，停机时电解液从电解槽1排空至电解液循环罐14，电解槽1不再有可观的酸泥存在。所述刷洗循环罐22分别通过进液管线二7和出液管线二21与刷洗槽6的出液口和进液口构成闭环回路；所述电解液循环罐14和刷洗循环罐22底部均通过净化管路一17连接输送泵，输送泵将电解液运送至电解液净化装置2的进液口，所述电解液净化装置2的出液口通过净化管路二13连接电解液循环罐14的进液口，净化完成后的电解液通过净化管路二13再回流至电解液循环罐14，含有一定电解质的刷洗液可以输送至电解液循环罐14中，既可以弥补因为蒸发造成的电解液水分损失，还可以再回收一部分电解质利用，电解系统酸洗后产生的沉淀、污泥可以通过电解液净化装置2去除，这样可避免沉淀物积累成酸泥的同时，管道和设备不会因为堵塞而自身损坏或影响生产，电极板表面上没有沉积物，电解效率提高，并延缓了电极板的腐蚀，其中，电解液净化装置2可以是压滤、吸滤、离心过滤等过滤方式；而所述电解槽1、电解液循环罐14、刷洗槽6和刷洗循环罐22的酸雾出口均通过酸雾管路8连接至酸雾净化塔27的进气口，电解槽1、电解液循环罐14、刷洗槽6和刷洗循环罐22产生的酸雾冷凝水均回流至酸 雾净化塔27中，保证排出的酸雾中强氧化性及酸性离子浓度在合格范围内，同时所述酸雾净化塔27下部外接补水管路28，正常生产时通过补水管路28向酸雾净化塔27中补入新水(脱盐水/冷凝水)，新水与回流的酸雾冷凝水混合，酸雾净化塔27的底部出液口通过外部的循环管线26连接至酸雾净化塔27上部，该循环管线26上设有酸雾净化循环泵25，通过酸雾净化循环泵25将酸雾净化塔27底部的混合液送入酸雾净化塔27上部进行循环净化，而该循环水达到一定浓度时可作为电解补水重新利用，所述酸雾净化塔27净化过程产生的烟气通过其顶部连接的排气管路10输送至排气烟囱12中排出。
具体的，对于电解槽1与电解液循环罐14的布置方式，可将所述电解液循环罐14位于电解槽1下方布置，且电解槽1内电解液溢流至进液管线一4内，进而自重流入电解液循环罐14中，所述电解液循环罐14的出液管线一16上设有电解液循环泵15，通过电解液循环泵15将电解液循环罐14中的电解液泵入电解槽1中。同理，所述刷洗循环罐22位于刷洗槽6下方，且刷洗槽6的出液口位于刷洗槽6底部，刷洗槽6内刷洗水自重流至刷洗循环罐22，所述刷洗循环罐22的出液管线二21上设有刷洗循环泵20。所述电解液净化装置2位于电解液循环罐14上方，电解液净化装置2净化完后的电解液自重回流至电解液循环罐14中。
而为了保证电解酸洗工艺的温度要求，所述电解液循环罐14的出液管线一16上连接有电解液换热器5，通过电解液换热器5对由电解液循环罐14输送至电解槽1的电解液进行加热，而此电解液换热器5所采用的加热介质为机组炉区废气余热利用产生的蒸汽，炉区升温一般在生产前开始，当炉区废气到一定温度时就足以利用余热锅炉产生蒸汽，蒸汽整个机组可自产自用、无需外送蒸汽，通过机组炉区的余热锅炉作为电解液加热的热源，大大降低了生产能耗成本。优化的，所述电解液换热器5的冷凝水出口通过管道连接至收集系统后通过泵输送至所述酸雾净化塔27的补水管路 28上，以便将在此电解液换热器5换热过程中产生的冷凝水作为酸雾净化塔27中的新水补入，减少外接新水的补入，节约了能源资源。
细化刷洗和电解过程中的补水方式，所述酸雾净化塔27的循环管线26上通过补水支管一23连接至所述刷洗循环罐22的进液口，且补水支管一23上设有控制阀门一24，当酸雾净化塔27中循环水达到一定浓度时，开启控制阀门一24，酸雾净化塔27中的循环水通过补水支管一23输送至刷洗循环罐22中，实现对刷洗槽6的补水。进一步的，所述刷洗循环罐22的出液管线二21通过补水支管二18连接至所述电解液循环罐14的进液口，且补水支管二18上设有控制阀门二19，当刷洗循环罐22中的刷洗循环水达到饱和浓度时，开启控制阀门二19，刷洗循环罐22中刷洗循环水通过补水支管二18输送至电解液循环罐14中以弥补电解液蒸发造成的损失，这样电解和刷洗系统无需再根据生产情况排放废液后，重新加药及新水配液，避免了酸雾净化、刷洗、电解单个系统排放废液和配置新循环介质而造成能源介质大量浪费，在正常生产时，只需在酸雾净化塔27补入新水，最终经过净化、含有一定量电解质的废液流入到电解液循环罐14，又重新得到了利用，大幅度的节省了能源介质。
优化的，所述酸雾净化塔27的排气管路10上可设置排雾风机9和雾滴分离器11，通过雾滴分离器11进一步降低排放烟气中的酸雾含量，减少空气污染，而且雾滴分离器11的冷凝液出口连接酸雾净化塔27的进液口，将雾滴分离器22积聚的冷凝液回流至酸雾净化塔27进行净化重复利用，避免了能源介质资源的浪费。
以上例举仅仅是对本实用新型的举例说明，并不构成对本实用新型的保护范围的限制，凡是与本实用新型相同或相似的设计均属于本发明的保护范围之内。

Claims (10)

  1. 一种节能环保带钢电解酸洗系统，其特征在于：包括电解槽、电解液循环罐、刷洗槽、刷洗循环罐、酸雾净化塔和电解液净化装置，所述电解槽和刷洗槽并排布置，所述电解液循环罐分别通过进液管线一和出液管线一与电解槽的出液口和进液口构成闭环回路，所述刷洗循环罐分别通过进液管线二和出液管线二与刷洗槽的出液口和进液口构成闭环回路，所述电解液循环罐和刷洗循环罐底部均通过净化管路一连接电解液净化装置的进液口，电解液净化装置的出液口通过净化管路二连接电解液循环罐的进液口，所述电解槽、电解液循环罐、刷洗槽和刷洗循环罐的酸雾出口均通过酸雾管路连接至酸雾净化塔的进气口，所述酸雾净化塔下部外接补水管路，酸雾净化塔的底部出液口通过外部的循环管线连接至酸雾净化塔上部，该循环管线上设有酸雾净化循环泵，所述酸雾净化塔顶部通过排气管路连接至排气烟囱。
  2. 如权利要求1所述的一种节能环保带钢电解酸洗系统，其特征在于：所述电解槽底部设有喷射管路。
  3. 如权利要求1所述的一种节能环保带钢电解酸洗系统，其特征在于：所述电解液循环罐的出液管线一上连接有电解液换热器。
  4. 如权利要求3所述的一种节能环保带钢电解酸洗系统，其特征在于：所述电解液换热器的冷凝水出口与所述酸雾净化塔的补水管路连接，用电解液换热器的冷凝水作为酸雾净化塔的补水。
  5. 如权利要求1所述的一种节能环保带钢电解酸洗系统，其特征在于：所述酸雾净化塔的循环管线上通过补水支管一连接至所述刷洗循环罐的进液口，且补水支管一上设有控制阀门一。
  6. 如权利要求5所述的一种节能环保带钢电解酸洗系统，其特征在于：所述刷洗循环罐的出液管线二通过补水支管二连接至所述电解液循环罐的进液口，且补水支管二上设有控制阀门二。
  7. 如权利要求1所述的一种节能环保带钢电解酸洗系统，其特征在于： 所述酸雾净化塔的排气管路上设置有排雾风机和雾滴分离器，且雾滴分离器的冷凝液出口连接酸雾净化塔的进液口。
  8. 如权利要求1所述的一种节能环保带钢电解酸洗系统，其特征在于：所述电解液循环罐位于电解槽下方，且电解槽内电解液溢流至进液管线一内，所述电解液循环罐的出液管线一上设有电解液循环泵。
  9. 如权利要求1所述的一种节能环保带钢电解酸洗系统，其特征在于：所述刷洗循环罐位于刷洗槽下方，且刷洗槽的出液口位于刷洗槽底部，刷洗槽内刷洗水自重流至刷洗循环罐，所述刷洗循环罐的出液管线二上设有刷洗循环泵。
  10. 如权利要求1所述的一种节能环保带钢电解酸洗系统，其特征在于：所述电解液净化装置位于电解液循环罐上方，电解液净化装置净化完后的电解液自重回流至电解液循环罐。
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