Analysis On The Characteristics Of Coal Mine Ventilation Fuel Gas Catalytic Combustion Micro Gas Turbine System

Catalytic combustion gas turbine technology has obvious advantage in the respect of environment friendly, high efficiency, good safety and flexibility, low electricity transporting cost. Coal mine ventilation gas come from the coal mining process and has cause huge fuel waste. Until now there isn't an effective way to use this part of fuel gas, this paper has advanced a new method to utilize it using the new type of catalytic combustion gas turbine system. This technology has not only solve the problem of energy waste but only can further alleviate the green house problem that caused by the fuel gas emissions. So the system has become one hot spot in the respect of power generation. As gas turbine and catalytic combustion have drastic nonlinearity, and it cause strong difficulty to analyze the dynamic characteristic of the system. So the direct debug for the system have better analyze each single component such as gas turbine, gas compressor and catalytic combustor based on common characteristic parameters, and then put them together for the system trial, providing technology preparation for the further commercialization of whole catalytic combustion gas turbine system.This paper's job has focused on the following several aspects:Firstly, catalytic combustion reaction characteristic of each single tiny channel of the honeycomb catalytic combustor have been investigated when super-low fuel concentration gas flow travels through the combustor. Based on the fuel CH₄ and H₂, the influence of catalyst mass load, combustion pressure, gas volume flow rate, combustor inlet temperature and gas fuel fraction in the premixed gas on the catalytic combustion characteristic in the combustor.Secondly, Based on the pilot-scale catalytic trial which was finished by Australian cooperation aspect, this paper has independently designed a new CH₄ catalytic combustion trial platform according to moderate scale gas flow rate, temperature and pressure parameters. The job mainly focus on the following several aspects: The whole catalytic trial platform process design; Main component mechanical design(gas heater and catalytic combustor);Key record apparatus choosing(such as flow meter, pressure and temperature gauge and so on);Control system design for the gas heater and so on. Besides, I have joined the trial for gas turbine system that was using traditional combustor based on the ventilation gas catalytic combustor design working condition separately: running-in trial, self-circulation without load and on load, start up trial.Thirdly, I have established the model of catalytic combustion gas turbine system using the related component characteristic parameters. Based on the model I have done dynamic simulation and control modulation for the system.The job of this paper has provided good foundation for the further practical gas turbine system design and research; Successful completion for the design job of Moderate scale catalytic combustion trial platform and gas turbine system trail have provided solid technology foundation; And the catalytic analogy computation and system simulation have provided further reference for the following system debug and control strategy research.