Accurate self-preheating type safety energy-saving heat storage combustion system and method

Abstract

The invention discloses an accurate self-preheating type safety energy-saving heat storage combustion system. The system mainly comprises a gas preheating device, a gas inlet device, an exhaust device, a gas monitoring system, a porous medium burner and a CCHP system, wherein the gas inlet device and the exhaust device are connected with the left end and the right end of the gas preheating deviceseparately; the porous medium burner is connected with a stirling generator; and the CCHP system is connected with the exhaust device. Low-heating-value gas like mine low-concentration gas and low-concentration natural gas burns in porous media, burning heating enters the stirling generator to generate power, and waste heat is used for secondary power generation, refrigeration and heating througha steam power machine; in addition, the system has the real-time gas monitoring function, and responses to problems of the gas leakage, overproof gas concentration and the like in time; the system further has the accurate self-preheating function, and preheats the gas in advance, so that the temperature achieves the initial requirement; and the system and method are convenient to operate, save energy, and are environmentally friendly, good in effect and high in safety performance.

Description

technical field [0001] The invention relates to the technical field of combustion systems, in particular to a precise self-preheating type safety and energy-saving heat storage combustion system and method. Background technique [0002] Regenerative combustion technology in porous media is a new combustion technology developed in recent decades. Compared with traditional combustion technology, it has good stability, high combustion efficiency, high combustion intensity, low pollutant emission, and load adjustment range. Wide, wide lean burn limit and other advantages. Porous media with high porosity has great thermal conductivity, thermal radiation, specific surface area, and heat capacity, so it has unique advantages in realizing rapid heat transfer between premixed gas and porous media, and between combustion products and porous media. Coal mine low-concentration methane gas, low-concentration natural gas, landfill gas, etc. are typical low calorific value gases, which ar...

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Problems solved by technology

The power generation part makes good use of the advantages of the screw expander. However, the circulating water part does not make full use of the waste heat of the flue gas, which causes the energy loss of the low calorific value gas with low energy density and reduces the energy utilization efficiency.

At the same time, the heat loss of the flue gas will lead to serious thermal pollution of the environment, which is not conducive to environmental protection

[0004] Due to the characteristics of low calorific value gas, there are great difficulties in traditional combustion technology, especially in how to generate high-grade electric energy.

Therefore, low-calorific-value gas-fired power generation has not been widely applied so far.

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