Device and method for treating aluminum phosphide reaction tail gas

Abstract

The invention discloses a device for treating aluminum phosphide reaction tail gas. The device comprises a sedimentation cooling chamber, a spray absorption tower and a plurality of packed absorption towers. The sedimentation cooling chamber is provided with a cooling chamber tail gas exhaust outlet and a spray device; distributors are arranged on the tops of the packed absorption towers, packed tower alkali liquor input ports and packed tower tail gas output ports are formed in the tops of the packed absorption towers, packed tower tail gas input ports are formed in the lower portions of the packed adsorption towers, and packed tower alkali liquor alkali storage tanks with packed tower alkali liquor output ports are arranged at the bottoms of the packed absorption towers; a spray tower alkali liquor input port and a spray tower tail gas input port are formed in the top of the spray absorption tower, a sprayer is arranged on the upper portion of the spray absorption tower, a falling film absorber and a gas-liquor separator are arranged on the lower portion of the spray absorption tower, and a spray tower alkali liquor alkali storage tank with a spray tower alkali liquor output port is arranged at the bottom of the spray absorption tower. The device has the advantages that the tail gas can be qualified to be discharged, alkali liquor obtained after the tail gas is absorbed can be utilized for preparing phosphate products, accordingly, the aluminum phosphide reaction tail gas can be comprehensively treated, and the device has excellent economic and environmental protection benefits.

Description

technical field [0001] The invention relates to the field of chemical waste gas treatment, in particular to a treatment device and method for aluminum phosphide reaction tail gas. Background technique [0002] Aluminum phosphide is a widely used broad-spectrum fumigant insecticide. At home and abroad, red phosphorus and aluminum powder are mostly used as raw materials for production. The process is generally to mix red phosphorus and aluminum powder fully, put them into a barrel and burn them into a tank, and put them into a reaction chamber to ignite and react. This reaction produces a large amount of smoke and acid smoke containing phosphorus pentoxide. If not treated, the leakage of smoke and smoke will cause serious environmental pollution. [0003] At present, the method of direct water spraying and absorption is mostly used for the treatment of aluminum phosphide reaction tail gas, but the effect of this treatment method is not good. There is still a lot of smoke and ...

AI Technical Summary

Problems solved by technology

This reaction produces a large amount of dust and acidic flue gas containing phosphorus pentoxide. If not treated, the leakage of dust and flue gas will cause serious environmental pollution

[0003] At present, the method of direct water spraying and absorption is mostly used for the treatment of aluminum phosphide reaction tail gas, but the effect of this treatment method is not good. There is still a lot of smoke and dust and smoke coming out of the operating environment, and a large amount of dilute phosphoric acid without industrial value is produced at the same time. Wastewater, which corrodes the equipment seriously, discharges into the water body and causes serious phosphorus exceeding the standard, and it is necessary to dephosphorize the wastewater containing phosphorus

Images