Waste acid regeneration device and process

Abstract

The invention discloses a waste acid regeneration device and a waste acid regeneration process. The waste acid regeneration device comprises an absorption tower, a regenerated acid tank, a water collection tank, a bleaching tank as well as a bypass tubes wherein the outlet of the absorption tower is connected with the inlet of the regenerated acid tank; a first valve for controlling regenerated acids fed into the regenerated acid tank is arranged on the absorption tower; the outlet of the water collection tank is connected with the inlet of the absorption tower; the outlet of the absorption tower is connected with the inlet of the water collection tank; a second valve for controlling water to flow back to the water collection tank is arranged on the absorption tower; the outlet of the bleaching tank is connected with the inlet of the water collection tank, and then water can be constantly supplied into the water collection tank; the bypass tube is arranged at the outlet of the absorption tower and the inlet of the bleaching tank; a third valve is arranged on the bypass tube. In a water operation mode, the first valve is closed, the third valve is opened, the opening degree of the second valve is adjusted according to liquid levels of the water collection tank, and furthermore the phenomenon of water tank overflowing is avoided.

Description

technical field [0001] The invention relates to the field of waste acid regeneration, more specifically, to a waste acid regeneration device and process. Background technique [0002] The waste acid regeneration process mainly includes acid operation mode and water operation mode. Among them, the acid operation mode is the main mode of the unit, that is, the process of converting waste acid into regenerated acid; the water operation mode is to use water instead of waste acid to circulate the unit at the initial stage of furnace startup, before shutdown, waiting for materials and when some equipment is abnormal. operating mode. [0003] During the actual operation of the unit, the water used in the acid operation mode and the water operation mode both comes from the sump. The difference is that during the acid operation, the water enters the absorption tower from the sump, absorbs the acid mist and forms regenerated acid, and flows into the regenerated acid tank; When the w...

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Problems solved by technology

[0004] As far as the prior art is concerned, the water source of the sump is the rinsing water tank, and the rinsing water is replenished into the sump at a constant flow rate; therefore, in the water operation mode, the amount of water flowing back into the sump from the absorption tower is the same as the amount of water flowing into the sump from the rinsing water tank. The sum of the water volume is greater than the water volume supplied by the sump to the absorption tower, so the sump is always in an overflow state, resulting in waste of rinsing water

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