High-temperature oxygen-rich super-normal-pressure reinforced combustion purification method for benzene noxious substance in industrial exhaust gas

Abstract

The invention discloses a high-temperature oxygen-rich super-normal-pressure reinforced combustion purification method for benzene noxious substance in the industrial exhaust gas. The method comprisesthe following steps that (1) the benzene-containing exhaust gas is collected; (2) the exhaust gas is mixed with the oxygen to form oxygen-rich mixed gas; (3) the mixed gas is led to a combustion chamber of more than 1300 DEG C so that the exhaust gas is reacted with the oxygen fully in a turbulence churning state to generate CO2 and H2O in the combustion chamber of the high-temperature oxygen-rich atmosphere to be purified, and further comprises a steps (1-1) after the step of (1): the exhaust gas is led to an even storage device so that the exhaust gas concentration is uniform, and in the step of (3), the mixed gas is reacted with the oxygen in the combustion chamber of the super-normal-pressure atmosphere. The method is convenient to operate, safe, reliable, easy to popularize, saving in investment, and high in purification rate, the benzene-containing gases can be efficiently purified, all kinds of harmful flammable gases and combustible dust in the exhaust gas can further be efficiently purified, and the metal dust with the melting point of less than 1380 DEG C can also be dissolved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and relates to a method for purifying pollutants such as benzene-containing harmful waste gas and soot, in particular to a method for purifying high-temperature oxygen-enriched supernormal pressure enhanced combustion of benzene-type harmful substances in industrial waste gas. Background technique [0002] In industrial production at home and abroad, all industries that use aromatic materials (that is, hydrocarbons containing benzene ring structure in the molecule), such as plastic industry, rubber industry, paint, petrochemical and other chemical industries, pharmaceutical industry, waste incineration and In the lost foam and V-method casting industries, etc., the materials with benzene ring structure will inevitably produce waste gas containing benzene (benzene, toluene, ethylbenzene, styrene, etc.) during the heating, combustion, gasification or cracking process. All industrie...

AI Technical Summary

Problems solved by technology

So far, there is still nothing to do at home and abroad on the pollution of benzene waste gas, CO and C smoke and dust generated during the pouring of EPS (expanded polystyrene) in lost foam casting. This problem has become the biggest problem in the environmental protection and sustainable development of lost foam casting. obstacle

As early as more than ten years ago, there were research reports on the treatment of industrial benzene waste gas abroad, such as the so-called "precious metal adsorption concentration catalytic combustion method", but it was not advanced and practical. It costs millions or even tens of millions of yuan, the operating cost is very high, there are many safety hazards in the operation process, the collected benzene and other gases are prone to leakage, the operation is complicated, and the adsorption effect is limited.

For example, diesel oil has a certain effect on the adsorption of benzene, but it has little effect on the adsorption and purification of toluene, ethylbenzene, and styrene, and it cannot absorb CO gas in the exhaust gas, and the effect of any adsorbent is weakened to disappear as it becomes saturated. Therefore, it does not have the value of popularization and application

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