Low-NOx afterburning and VOC efficient removing method and system based on RTO

Abstract

The invention discloses a low-NOx afterburning and VOC efficient removing method and a system based on RTO, and is applied to a double-chamber RTO waste gas treatment system in the field of organic waste gas treatment. The method monitors inlet waste gas online; corresponding equipment outer passage is switched according to the concentration of the water gas; and meanwhile, a heat storage body temperature field is combined to reversely switch the flowing direction of the waste gas in equipment, so that the thermal oxidation efficiency of the organic waste gas is improved; on the one hand, the method can realize low-NOx combustion on the basis of not greatly changing the equipment structure, reduces the performance requirements on a combustor, discards a low-NOx combustor with high use cost, and reduces the investment cost; and on the other hand, high-level VOC removing efficiency can be realized, fuels are sprayed into the organic waste gas for full mixing to greatly improve the combustion efficiency, and the combustion temperature in the combustion chamber is distributed more uniformly to generate the effect of flameless combustion, so that the fuels can be saved by above 20% compared with a combustor combustion method, and meanwhile, zero emission of NOx is realized.

Description

technical field [0001] The invention is applied to the environmental protection field of organic waste gas removal by thermal oxidation method, and specifically relates to an RTO-based low NOx supplementary combustion and VOC efficient removal method and system. Background technique [0002] RTO (Regenerative Thermal Oxidizer, referred to as RTO), regenerative oxidation furnace, is a high-efficiency organic waste gas treatment equipment. [0003] In the regenerative thermal oxidation furnace, the organic waste gas is oxidized at a high temperature in the combustion chamber, releasing carbon dioxide and water vapor. The exhaust gas is first heated by the heat storage body on one side, and then passed into the combustion chamber for combustion. The exhaust gas after combustion releases heat through the heat storage body on the other side, so that the heat storage body can be used for the next heating of organic waste gas. Heat, when the switching time is reached, the valve mo...

AI Technical Summary

Problems solved by technology

This supplementary combustion method has great hidden dangers. In the case of the compact structure of the existing RTO combustion chamber, the supplementary combustion fuel enters the combustion chamber intensively, which will cause the local temperature around the burner to be too high, and the temperature field and flow inside the combustion chamber The uniformity of the field is reduced, and a large amount of NOx is generated, resulting in secondary pollution

If the low NOx burner is used, although the problem of high NOx emission can be solved to a certain extent, it cannot be completely solved. At the same time, the high price of the low NOx burner will further increase the investment cost of the enterprise, so it is necessary to improve the existing RTO equipment Supplementary combustion method to solve the corresponding pollution and investment problems

In addition, for RTO equipment, in the current situation, the regenerator follows the principle of switching at a fixed time. When the working conditions change, it is easy to cause problems such as low VOC removal efficiency or high NOx content.

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