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System and method for acid leakage treatment of acid tank and acid tank in cold rolling and acid rolling mill

A treatment method and acid tank technology are applied in the field of acid leakage treatment systems to achieve the effects of preventing the expansion of accidents, accelerating the rhythm of acid pouring, and ensuring the quality of pickling

Active Publication Date: 2018-06-22
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned problems in the prior art, the main purpose of the present invention is to provide a system and method for acid leakage treatment of acid tanks and acid tanks in a cold-rolled acid rolling mill. When an acid leakage accident occurs, a certain acid tank or acid tank is abandoned Pickling, use the remaining tank to complete the pickling task, reduce the impact of production line shutdown caused by acid leakage, and prevent shutdown or insufficient pickling

Method used

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  • System and method for acid leakage treatment of acid tank and acid tank in cold rolling and acid rolling mill
  • System and method for acid leakage treatment of acid tank and acid tank in cold rolling and acid rolling mill
  • System and method for acid leakage treatment of acid tank and acid tank in cold rolling and acid rolling mill

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Embodiment 1: as image 3 In the flow chart shown, when the pickling process section is set to three acid tanks, the treatment method for the acid leakage of the first acid tank 1a in the embodiment of the present application includes the following steps:

[0083] 1. Close the large circulation system of the first acid tank 1a, and open the small circulation system of the first acid tank 1a. Force the ready signal of the sprinkler system of the first acid tank 1b, and at the same time force the large circulation valve body (SSV1111 and SSV1113) of the first acid tank 1b to open, and the small circulation valve body (SSV1112 and SSV1114) of the first acid tank 1b to close.

[0084] 2. Set the free acid target concentrations of the second acid tank 2b and the third acid tank 3b to 110g / l and 150g / l;

[0085] 3. Turn the negative pressure valve of the first acid tank 1a to the maximum position to ensure that the first acid tank 1a is always in a negative pressure state. ...

Embodiment 2

[0089] Embodiment 2: as Figure 4 As shown in the flow chart, when the pickling process section is set to three acid tanks, the treatment method when the third acid tank 3b leaks acid at the 55% liquid level in the embodiment of the present application includes the following steps:

[0090] 1. After the leak is temporarily blocked, open the third acid tank 3b to cascade to the second acid tank 2b, and at the same time open the third acid tank 3b to cascade to the first acid tank 1b (newly modified standby cascade), stop Beat acid and water to the third acid tank 3b.

[0091] 2. Modify the H, H, L, LL of the LIC1131 alarm value of the third acid tank 3b liquid level.

[0092] 3. Start the waste acid pump, and turn the waste acid valve of the third acid tank 3b to the acid regeneration system 4 to the maximum value.

[0093]4. Since the automatic liquid level setting of LIC1131 in the third acid tank 3b is calculated by the amount of spraying, the automatic liquid level settin...

Embodiment 3

[0095] Embodiment 3: as Figure 5 As shown in the flow chart, when the pickling process section is set to three acid tanks, the treatment method when the second acid tank 2b leaks acid at the bottom in the embodiment of the present application includes the following steps:

[0096] 1. The mandatory signal is as follows:

[0097] The second acid tank 2b heating system ready signal;

[0098] The ready signal of the sprinkler system of the second acid tank 2b;

[0099] The operation signal of the heating system of the second acid tank 2b;

[0100] The operation signals of the 3 spray pumps of the second acid tank 2b;

[0101] A total of 6 signals for the automatic heating system and sprinkler system of the second acid tank 2b;

[0102] The second tank 2b size loops a total of 4 signals;

[0103] There are 3 signals for forcing the temperature of the second acid tank 2b and the temperature of the pipeline.

[0104] 2. Stop the circulation pump of the second acid tank 2b, clo...

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Abstract

The invention provides an acid leakage treatment system and method for acid troughs and acid tanks in a cold rolling and acid rolling unit. An acid circulating system of the cold rolling and acid rolling unit comprises an acid regeneration system, the multiple acid troughs and the corresponding acid tanks. The acid tanks are used for storing acid, the acid circulates between the acid troughs and the acid tanks through pipelines, and a hot rolling roll is sequentially subjected to acid pickling through the multiple acid troughs. On the basis of an original acid circulating system, the improvement is made for the acid pickling circulating system, cascade valves and pipelines are additionally arranged between the tail-level acid tank and the first acid tank, pipelines from the acid tanks to the acid regeneration system are arranged, and therefore when the acid leakage accident happens, one certain acid leakage acid trough or acid tank is abandoned, and the rest of acid troughs and acid tanks are utilized for finishing the acid pickling task. According to the method, measures are taken from the three aspects of machines, technology operation and electrical control according to various acid leakage situations, and the defect of shutdown or insufficient acid pickling is overcome.

Description

technical field [0001] The invention relates to an acid leakage treatment system and method for an acid tank and an acid tank in a cold-rolling and acid-rolling unit, and belongs to the technical field of acid-rolling control in the metallurgical processing industry. Background technique [0002] The pickling section in the cold-rolling and pickling mill is a crucial component. Whether the pickling section runs well is related to the smooth and stable operation of the pickling. The acid tank and acid tank are the core of the pickling section, and the steel strip passes through the acid tank continuously. The acid tank is used to store acid. The acid circulates between the acid tank and the acid tank. Their function is to clean the oxide scale on the surface of the hot-rolled coil for rolling. Whether the pickling effect is good or not affects the quality of the entire cold-rolled product. grade. Due to the different scale structures on the surface of different types of stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G3/02
CPCC23G3/02
Inventor 李生存李保卫赵兴陈景辉李志强高峰石峰
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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