Clean air separation gas combustion reactor system and operation method

Abstract

The invention discloses a clean air separation gas combustion reactor system and an operation method. The system is composed of a compression device, a stage end cooler, a heat storage tank, a cold box, a cryogenic expansion machine, an expansion valve, a fractionating tower, a throttling valve, a reheater and a natural gas boiler. The operation method of the system is an air separation and combustion coupling method. Fuel gas, nitrogen and oxygen are heated in an auxiliary mode through waste heat, the inlet condition of the natural gas boiler is improved, the system can independently produce oxygen, normal work of the natural gas boiler is guaranteed, meanwhile, the air separation by-product nitrogen is added to serve as backflow flue gas, and the clean combustion effect is achieved; the purpose of additionally arranging a heat accumulator and the reheater is to utilize waste heat in the air separation process to heat fuel gas, nitrogen and oxygen entering the natural gas boiler, and the combustion efficiency is improved; and the low-temperature fractionation air separation is additionally arranged so that oxygen needed by oxygen-enriched combustion of gas fuel can be independently prepared, nitrogen serves as backflow flue gas, the combustion efficiency is improved, and different requirements of users are met.

Description

technical field [0001] The invention belongs to the technical field of clean combustion, and in particular relates to a clean air separation gas combustion reactor system and an operation method. Background technique [0002] NOx is the collective name of various nitrogen oxides such as NO, NO2 and N2O, and the NOx produced by combustion is mainly NO. There are three mechanisms for the formation of NOx: fuel-NOx, thermal-NOx, and prompt-NOx. In industrial boilers, thermal-NOx is the main source of nitrogen oxides. At present, most large-scale burners adopt the method of non-premixed combustion bottles, that is, the gas and air do not mix in the burner, but the two air flows are mixed with each other at the outlet of the burner through different jets, swirls, etc. Set fire to burn. This combustion rate depends on the mixing rate of air and gas is called diffusion controlled combustion. According to the analysis of NOx formation mechanism and the influence of gas burner wor...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a new clean air separation gas combustion reactor system and operation method to solve the problem of high smoke temperature at the furnace outlet and single and independent oxygen source in the existing cyclone primary and secondary air thick-lean combustion technology. Insufficient, one or more of the technical problems of waste of resources due to large fluctuations in flue gas circulation are not easy to control

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