Nonferrous smelting flue gas adiabatic evaporation cooling acid washing arsenic removal purification system and method

Abstract

The invention discloses a nonferrous smelting flue gas adiabatic evaporation cooling acid washing arsenic removal purification system and method, and the system comprises a factory, an adiabatic evaporator, an acid liquid spray tower, a rotary dust remover, a demister, a plate-and-frame filter press, an inclined plate sedimentation separator, a liquid heat exchanger, a sinter plate dust remover, a water spray tower and a waste collection pool. A carbon steel flue is arranged between the exhaust end of the factory and the air inlet end of the adiabatic evaporator, the air outlet end of the adiabatic evaporator is connected with the air inlet end of the rotary dust remover through a pipeline, and the waste end of the rotary dust remover is connected with the feeding end of the waste collecting pool through a pipeline. The air outlet end of the rotary dust remover is connected with the air inlet end of the acid liquor spray tower through a pneumatic pump and a pipeline, and the air outlet end of the acid liquor spray tower is connected with the air inlet end of the demister through a pneumatic pump and a pipeline. The problems that in the prior art, the traditional flue gas arsenic removal process is tedious, and the operation cost is high are solved. The system and the method have the advantages of simple steps, low cost and the like.

Description

technical field [0001] The invention relates to the field of non-ferrous smelting waste gas treatment, more specifically, to a non-ferrous smelting flue gas adiabatic evaporative cooling acid washing and arsenic removal purification system and method thereof. Background technique [0002] In the process of non-ferrous smelting copper, lead, zinc, etc., the arsenic contained in the ore is converted into arsenic trioxide and enters the flue gas after roasting, and the smelting flue gas also contains high concentrations of sulfur oxides, and high concentrations of dioxide are generally produced by conversion methods Sulfuric acid, because the removal of arsenic is accompanied by the purification process of acid production, arsenic will poison the vanadium catalyst for acid production, so the flue gas acid production must be purified to remove arsenic. There are two main processes for collecting arsenic from flue gas to make acid: wet method and dry method. At present, the wet ...

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Problems solved by technology

[0004] In order to overcome the problems in the prior art that the traditional process of removing arsenic from non-ferrous smelting flue gas is relatively cumbersome and the operation cost is high, the present invention now provides a non-ferrous smelting flue gas thermal insulation with the advantages of simple arsenic removal process and low operating cost. Evaporative cooling acid washing arsenic removal purification system and method thereof

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