Porous medium combustion and fuel cell multistage coupling energy system

Abstract

The invention discloses a porous medium combustion and fuel cell multistage coupling energy system. A low-heating-value gas supply system and an air supply system are simultaneously connected to a proportional mixer and are sequentially connected with a porous medium combustion unit, a variable-frequency fan, a waste heat boiler, an energy storage water tank, a gas separation system and a fuel cell; the waste heat boiler is connected with a steam turbine and a heat supply pipe sleeve to generate power and preheat low-heating-value gas respectively; the energy storage water tank is connected with a water segregator and the water-cooling heat exchanger for heating and preheating respectively; the water-cooling heat exchanger is connected with the water segregator and the heat supply pipe sleeve for heating and preheating; a water collector is connected to a circulating water pump to provide cold water for the waste heat boiler, the energy storage water tank and the water-cooling heat exchanger; a waste gas treatment chamber is used for treating waste gas generated by combustion; and an intelligent control terminal controls the gas conveying operation of the whole system. According tothe system, conversion of clean energy is obtained while greenhouse gas emission is reduced, clean production and utilization of coal mine gas are achieved, and green cyclic development of economy ispromoted.

Description

technical field [0001] The invention relates to the technical field of a low calorific value gas energy utilization system, in particular to a porous medium combustion and fuel cell multi-stage coupling energy system. Background technique [0002] The development of fuel cell technology has rapidly increased the demand for hydrogen, a new type of pollution-free energy. More than 70% of the gas extracted from coal mines is low-concentration gas (methane volume concentration <30%), that is, methane with an equivalence ratio of less than 4, which is not conducive to storage and utilization. Discharge into the atmosphere causes huge energy waste and environmental pollution. Therefore, the use of low-concentration coal mine gas in porous media partial oxidation reforming hydrogen production can not only effectively solve coal mine gas accidents, improve coal mine safety production conditions, but also help increase hydrogen energy supply, reduce greenhouse gas emissions, and ...

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Problems solved by technology

[0003] Today, when energy resources are extremely scarce, realizing multi-level utilization of energy is an important measure for energy conservation. Combustion hydrogen production technology is gradually developing, and the multi-level energy utilization combined with fuel cells has not yet been realized. This multi-level energy utilization system combined with porous media burners and hydrogen fuel cells can generate hydrogen while regenerating waste heat, waste gas make maximum use of

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