Treatment device and treatment method for organic flue gas in roasting flue gas

Abstract

The invention relates to the technical field of roasting flue gas treatment, in particular to a treatment device and method for organic flue gas in roasting flue gas. The treatment device comprises a flue gas pretreatment device, a reactor, a dust remover and a pelletizing device; a flue gas inlet of the flue gas pretreatment device is connected with a roasting furnace so as to carry out pretreatment on roasting flue gas before adsorption reaction; a flue gas outlet of the flue gas pretreatment device is connected with the reactor, and the reactor is connected with an adsorbent bin, so that an adsorbent in the adsorbent bin is subjected to adsorption reaction with flue gas; and the upper part of the reactor is connected with the dust remover, a flue gas outlet of the dust remover is connected with a next purification process, a material outlet of the dust remover is connected with the pelletizing device, and a finished product material prepared by the pelletizing device is returned to the roasting furnace. According to the treatment device and method, asphalt fume and benzopyrene can be treated simultaneously; pelletizing is carried out after the adsorbent finishes adsorption, and the absorbent is returned to a roasting workshop in the form of a filler for recycling; no wastewater or waste is generated; and the investment and operation cost is low.

Description

technical field [0001] The invention relates to the technical field of roasting flue gas treatment, in particular to a treatment device and method for organic flue gas in roasting flue gas. Background technique [0002] The output of prebaked anodes in my country is huge, about 31 million tons per year. Anode roasting is an important process for the production of prebaked anodes, and the treatment of its flue gas is very important. Organic flue gas is an important pollutant in roasting flue gas, mainly including asphalt fume (100-300mg / Nm 3 ) and benzopyrene (0.17-0.25 mg / Nm 3 ). [0003] Benzopyrene is a highly active indirect carcinogen, which is extremely harmful to the human body. In the "Comprehensive Emission Standard of Air Pollutants" (GB-16297), the emission limit of benzopyrene is required to be 3×10 -4 mg / Nm 3 . The Environmental Protection Tax Law came into effect on January 1, 2018. According to calculations, the flue gas volume of a prebaked anode plant w...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of treating organic fume in roasting flue gas, the present invention provides a treatment device and method for organic fume in roasting flue gas

Images