Wastewater zero-discharge system for acid regeneration system and process of wastewater zero-emission system

Abstract

The invention provides a wastewater zero-discharge system for an acid regeneration system and a process of the wastewater zero-discharge system. The wastewater zero-discharge system comprises a wastewater collecting pool, wherein the wastewater collecting pool is provided with a sedimentation area and a clarified solution area; the sedimentation area and the clarified solution area are separated by a separation wall; a filter screen is arranged above the separation wall; the sedimentation area is used for collecting wastewater discharged by the acid regeneration system; the clarified solution area is connected with a lifting pump; the lifting pump is connected with a filter; when the acid regeneration system normally operates, the generated wastewater passes through the filter, then is collected in a rinse water collecting tank and is used for the acid regeneration system; when the acid regeneration system abnormally operates or fails, the generated wastewater passes through the filter, is collected in an acid storage tank and then is used for the acid regeneration system. Therefore, according to the wastewater zero-discharge system for the acid regeneration system and the process of the wastewater zero-discharge system, the wastewater can be recycled, and the production cost is reduced.

Description

technical field [0001] The invention relates to the environmental protection fields of steel, chemical industry and other industries, in particular to a waste water zero discharge system of an acid regeneration system and a process thereof. Background technique [0002] At present, most of the cold rolling and silicon steel pickling waste liquid regeneration processes in iron and steel enterprises use the spray roasting method, and a small part of the processes use the fluidized bed method. Both processes can recycle waste acid as resources, and the technology is mature and the operation is stable. However, during the normal operation of the spray roasting method acid regeneration system, a certain amount of waste water will be generated due to cleaning of the acid gun, cleaning of the filter, overflow of the tower, overflow of the rinse water collection tank, etc.; similarly, the acid regeneration of the fluidized bed method A certain amount of waste water will also be gen...

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Problems solved by technology

However, for some small iron and steel enterprises that have not built wastewater treatment stations, the wastewater generated by the acid regeneration station has no way to be discharged; some iron and steel enterprises are far away from the acid regeneration station and the wastewater treatment station, the transportation is inconvenient, or the wastewater is restricted by elevation. The transmission pipeline needs to be equipped with deep underground pipe galleries. These underground pipe galleries are buried deep and require anti-corrosion treatment. They are equipped with ventilation, lighting and other facilities, and the construction cost is relatively high.

In addition, when the equipment and pipelines in the acid regeneration station fail, there will be a large amount of acid leakage. If this part of the acidic waste liquid is discharged to the wastewater treatment station, it will not only increase the operating load of the wastewater treatment station and affect its normal operation, but also caused a serious waste of resources

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