A system and method for recycling unqualified sodium hypochlorite

Abstract

The invention relates to an unqualified sodium hypochlorite recycling system and method. A secondary alkali liquor absorption tower is connected with a secondary alkali liquor circulating groove and a sodium hypochlorite finished product pump through branch pipelines, the outlet end of the secondary alkali liquor circulating groove and the outlet end of the sodium hypochlorite finished product pump are connected with a secondary alkali liquor circulating pump, the secondary alkali liquor circulating pump is sequentially connected with a condenser and the secondary alkali liquor absorption tower, the outlet end of the secondary alkali liquor circulating groove is further connected with the inlet end of a sodium hypochlorite finished product tank, the outlet end of the sodium hypochlorite finished product tank is connected with a delivery pipe, and a backflow pipeline is arranged between the sodium hypochlorite finished product tank and the secondary alkali liquor circulating groove. By means of a sodium hypochlorite producing device of the secondary alkali liquor absorption tower, the finished product tank is arranged on the outlet of the sodium hypochlorite finished product pump and extends to a secondary alkali liquor circulating groove pipeline, dense alkali is added into unqualified sodium hypochlorite again, and a proper amount of chlorine is introduced so that the indexes of sodium hypochlorite can be within the technological requirement range.

Description

technical field [0001] The invention belongs to the field of sodium hypochlorite production, in particular to a recycling system and method for unqualified sodium hypochlorite. Background technique [0002] At present, sodium hypochlorite is produced. In order to ensure that sodium hypochlorite can be cleaned and delivered to acetylene at any time, most enterprises are equipped with finished sodium hypochlorite tanks. In the finished tanks, the effective chlorine index is 60~70g / L and the free alkali is 5~8g / L by diluting with water. L. When the sodium hypochlorite is partially decomposed due to high summer temperature or the available chlorine index fails to meet the process requirements due to high temperature in summer, if the unqualified sodium hypochlorite is sent to acetylene for cleaning, the sulfur and phosphorus content in the acetylene will exceed the standard, affecting production; The discharge of secondary sodium into the ditch will increase the load of the sew...

AI Technical Summary

Problems solved by technology

When the sodium hypochlorite is partially decomposed due to high summer temperature or the available chlorine index fails to meet the process requirements due to high temperature in summer, if the unqualified sodium hypochlorite is sent to the acetylene for cleaning, the sulfur and phosphorus content in the acetylene will exceed the standard, affecting production; if the unqualified The discharge of secondary sodium into the ditch will increase the load of the sewage treatment station and cause a lot of waste of resources

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