Exhaust gas purification system

Abstract

The invention belongs to a waste gas purification system, and particularly relates to a system for purifying VOC through a molecular sieve rotating wheel and a catalytic combustion furnace. The system comprises a prefilter, the molecular sieve rotating wheel is connected to the prefilter, a first outlet of the molecular sieve rotating wheel is connected with an exhausting device, a heater is further connected to the molecular sieve rotating wheel, a second outlet of the molecular sieve rotating wheel is connected with a catalytic combustion device which is internally provided with a gas inlet assembly connected with a gas inlet, the gas inlet assembly comprises a gas inlet pipe connected with the gas inlet, and the surface of the gas inlet pipe is provided with vent holes. According to the waste gas purification system, the gas inlet assembly of the catalytic combustion device is improved, and the problem that in the prior art, due to the fact that gas is directly subjected to high pressure injection, mixing is nonuniform is solved; a dispersed gas inlet mode is adopted, harmful gas can be sufficiently mixed with combustion-supporting substances, the sufficient degree of combustion is improved, and the problem that the harmful gas is exhausted without being subjected to sufficient combustion is avoided.

Description

technical field [0001] The invention belongs to an exhaust gas purification system, in particular to a system for purifying VOC through a molecular sieve runner and a catalytic combustion furnace. Background technique [0002] Existing tar processing plants will produce exhaust gas after benzene washing and breathing gas from storage tanks during production. This type of exhaust gas contains toluene, xylene, phenol, naphthalene, etc., and is VOC (volatile organic compound) exhaust gas. If not Direct discharge after treatment will cause harm to the environment and human body, and violate the national environmental protection regulations. At present, the methods for eliminating VOC-containing exhaust gas mainly include chemical absorption, adsorption, catalytic oxidation and other methods. The chemical absorption method faces the problem of choosing a suitable absorption solvent, and the water solubility of the organic waste gas is poor; the gas volume of the catalytic oxidat...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention improves the intake assembly of the catalytic combustion device, changes the entry mode of the harmful gas from the molecular sieve runner, and overcomes the problem of uneven mixing existing in direct high-pressure injection in the prior art Problem, the present invention adopts the method of dispersing the intake air, so that the harmful gas can be fully mixed with the combustion-supporting substance, the adequacy of combustion is improved, and the problem of insufficient combustion of harmful gas is avoided

Images