|
China's energy system is dominated by coal, the combustion of coal is highly polluting, low efficiency, clean coal utilization technology is particularly important, coal gasification polygeneration technology is widely recognized by domestic and foreign scholars and major research a use of clean coal technology. This article is based on gasification gas and coke oven gas total to synthesis gas polygeneration system, the use of the combination of theory and experiment, the system purge gas-fired combustion characteristics were studied (temperature and concentration fields), summary of the purge gas combustion characteristics of law, efficient and low-pollution combustion gas turbines and designed to provide guidance for the polygeneration system. This paper theoretically analyzes the gas diffusion combustion flame structure, the height of the combustion chamber temperature distribution, gas analysis measuring points and the sampling and gas diffusion combustion stability, and system analysis of flame propagation speed and the theoretical combustion the effect of temperature factors for experimental design and experimental program formulation provides a theoretical guidance. Purge gas exhaust as chemical synthesis, with different synthetic chemical products, as well as different process variations, but generally showing a characteristic: Its ingredients include the CO H 2 , CO , CH 4 , N 2 , Ar, the H 2 higher levels of CO, CO 2 content is low, CH 4 moderate. The purge gas by one single nature of the gas and the ratio of components to determine the nature. This paper combines the research results at home and abroad to explore the physical and chemical properties of the purge gas. Purge gas characteristics based on the the gas burner theoretical knowledge of the subject studied to develop the experimental program and design calculations, to establish a more comprehensive and flexible system of purge gas combustion experiments. The whole experimental system mainly consists of a combustion chamber system, gas systems, air systems, measurement systems, and exhaust systems. The design seeks the flexibility and versatility of the entire experimental system, the combustion is divided into 5 sections design, each high 200mm, 200mm diameter. Sub-design can be changed as required length of the combustion chamber in a particular experiment, the initial parameters of the gas and the subsequent catalytic combustion experiments (catalyst in different places), easy disassembly and transport. Completed in the experimental system under different excess air ratio, purge gas combustion furnace at different heights along the radial temperature distribution and the flue gas composition analysis, the purge gas combustion made a preliminary exploratory research. The experimental results show that the excess air coefficient of the combustion temperature of the purge gas distribution and product influenced reasonable excess air coefficient is conducive to improve the full utilization of the purge gas temperature of the combustion chamber and fuel. Purge gas combustion temperature and combustion products, the impact of many factors, purge gas combustion characteristics, but also requires more exploration.
|