Vacuum acid liquid circulating pickling tank system

A technology of cyclic pickling and pickling pools, which is applied in the field of pickling pools for metal steel pipes. It can solve the problems of poor acid utilization, acid burns, and surface pollution. It achieves small fluctuations in the concentration of each component and improves acid Utilization rate, effect of reducing waste acid discharge

Pending Publication Date: 2019-05-17
上上德盛集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are three disadvantages of this trench form: 1. Once the pickling pool is broken, it is not easy to find; 2. After the pickling pool is broken, the acid will penetrate into the ground and cause pollution to the surface; 3. The upper part of the pickling pool is basically flat with the ground. It is easy to cause people to accidentally slip into the pool and cause safety accidents; the second is the floor type, that is, the pickling pool is placed on the ground and then water and acid are poured in. This form also has three disadvantages: 1. The pickling pool is separated from the pool. The ground is 1.5 meters high, it is not easy for the operator to see the situation in the pool, and the pickling quality cannot be guaranteed; 2. When the steel pipe is hoisted in, the acid splashes and burns people; 3. Since the pickling pool has a certain height, the operator must stand Operating on the wall of the pickling pool, there is a danger of slipping in. There have been many such casualties in history
[0003] At the same time, the utilization rate of acid in the existing pickling process is poor. Usually, after the stainless steel pipe is soaked for a period of time, the pickling is discharged as waste liquid. Not only is the acid waste serious, but also the pickling effect on the stainless steel pipe put in later is poor. At the same time, there is also a serious waste of cleaning water in the cleaning of pickling pools.

Method used

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  • Vacuum acid liquid circulating pickling tank system
  • Vacuum acid liquid circulating pickling tank system
  • Vacuum acid liquid circulating pickling tank system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] When pickling stainless steel pipes in the pickling tank 2, put the stainless steel pipes one by one on the steel pipe placement rack 11, then start the horizontal displacement drive motor 21, and the horizontal displacement drive motor 21 drives the supporting sliding foot plate 19 on the horizontal slide rail 22 to slide, so that the sealing cover plate 3 connected to the lifting drive cylinder 18 is transferred to the top of the pickling tank 2, and then the lifting drive cylinder 18 fixed on the support sliding foot plate 19 is started, driven by the lifting drive cylinder 18 The sealing cover plate 3 is lowered to cover the pool mouth of the pickling tank 2, so that the steel pipe placement frame 11 fixed on the lower end surface of the sealing cover plate 3 and the stainless steel pipe placed on the frame body are placed in the pickling tank 2 together, and then Start the air pump 15 to extract the air in the pickling tank 2 to form a vacuum tank, then open the flo...

Embodiment 2

[0031] During the pickling reaction process of the stainless steel pipe in the pickling tank 2, by opening the circulation regulating valve 8, the acid liquid flows along the pipeline to the detection sedimentation tank 27, and then the concentration of each component of the acid liquid in the detection sedimentation tank 27 is detected , the acid liquid flows back to the acid liquid storage tank 26 along the pipeline after settling in the detection settling tank 27 for a period of time, and according to the detection results of the concentration of each component of the acid liquid, it is determined that the new acid liquid is added to the acid liquid storage tank 26 through the new acid liquid filling port 33 Inject the amount of new acid solution, and the acid solution storage tank 26 continues to pour acid solution into the pickling tank 2, thereby forming the acid solution circulation in the acid solution storage tank 26, the pickling tank 2, and the detection settling tank...

Embodiment 3

[0033] After draining the waste acid, it is necessary to remove the residual waste acid liquid and solid impurities in the pickling tank 2, by opening the cleaning water input port 37 and the opening and closing pipe valve 35 along the waste water discharge port 34 and driving the pump II 29 by filling liquid , the cleaning water in the cleaning water storage tank 28 is pumped into the pickling tank 2 by the pump II 29 driven by the filling liquid, and the pickling tank 2 is cleaned, and the cleaning in the pickling tank 2 finally flows out from the waste water discharge port 34 along the pipeline to Filtration in the sedimentation tank 30, and the outflow cleaning water is mixed with waste acid solution and fixed impurities, wherein the fixed impurities are filtered and precipitated in the filtration sedimentation tank 30, and the filtered cleaning water flows back from the filtration sedimentation tank 30 along the delivery pipeline 32 into the cleaning water storage tank 28,...

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Abstract

The invention relates to a vacuum acid liquid circulating pickling tank system which comprises a supporting platform, a pickling tank placed on the supporting platform and a sealing cover plate covering a tank mouth of the pickling tank and is characterized in that the position, close to the upper tank mouth, on the tank groove wall surface on one side of the pickling tank is provided with an acidliquid injection hole; the position, close to the bottom end part, on the tank groove wall surface on one side of the pickling tank is provided with a drainage hole; the position, close to the uppertank mouth, on the tank groove wall surface on the other side of the pickling tank is provided with a water adding hole; the position, close to the bottom end part, on the tank groove wall surface onthe other side of the pickling tank is provided with an acid liquid drainage hole; and each of the acid liquid injection hole, the drainage hole, the water adding hole and the acid other drainage holeis provided with a flow regulation valve. By adopting the vacuum acid liquid circulating pickling tank system, a worker is avoided from being contacted with acid liquid in the pickling tank to the greatest extent so as to ensure the physical health and the production safety of the worker; meanwhile, cyclic use of the acid liquid is realized, and concentration fluctuations of various components ofthe acid liquid are small, so that the utilization rate of the acid liquid is increased, waste acid emission is reduced, and the acid liquid is saved; and similarly, washing water in the pickling tank is drained after being used for circulating washing, so that the water consumption is reduced, and pickling of a stainless steel pipe is ensured to be full.

Description

technical field [0001] The invention relates to the technical field of pickling pools for metal steel pipes, in particular to a vacuum acid liquid circulation pickling pool system. Background technique [0002] When the stainless steel pipe is made from a billet, the surface will be covered by O in the air 2 Oxidation produces black and yellow tight oxide layers. In order to improve the appearance and corrosion resistance of stainless steel, the processed stainless steel pipes must be pickled. There are generally two forms of pickling pools in the stainless steel pipe industry. It is to dig a ditch with the matching size of the pickling pool on the ground and insert the pickling pool in it. There are three disadvantages of this trench form: 1. Once the pickling pool is broken, it is not easy to find; 2. After the pickling pool is broken, the acid will penetrate into the ground and cause pollution to the surface; 3. The upper part of the pickling pool is basically flat with ...

Claims

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Application Information

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IPC IPC(8): C23G3/04
Inventor季学文余炳华李飞来
Owner上上德盛集团股份有限公司