Power plant and clean coal co-production system and power plant and clean coal co-production method
A clean and power plant technology, applied in the field of coal chemical industry, can solve the problem of high investment in clean coal installations
Inactive Publication Date: 2018-08-17
CHINA SHENHUA ENERGY CO LTD
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[0004] The main purpose of the present invention is to provide a cogeneration system and cogeneration method of a power plant and clean coal to solve the problem of high investment in clean coal equipment in the prior art
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[0027] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0028] As described in the background art, in the prior art, clean coal production needs to be equipped with an independent heat source and tail gas treatment device, resulting in high investment and energy consumption. However, due to the slowdown in national electricity demand in the past two years and the rapid growth of thermal power installed capacity, the utilization hours of thermal power have declined rapidly. In 2015, the average utilization hours of thermal power in the country was only 4,300 hours, and the load rate of thermal power plants was generally low. In addition, as the installed capacity of new energy increases, thermal power units, traditionally used as the main power suppl...
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Abstract
The invention provides a power plant and clean coal co-production system and a power plant and clean coal co-production method. The power plant and clean coal co-production method comprises that high-temperature flue gas is extracted from a coal-fired power station boiler or a fuel-fired power station boiler, wherein the high-temperature flue gas is directly taken from the furnace hearth high-temperature zone of the coal-fired power station boiler or the fuel-fired power station boiler, and the temperature T1 of the high-temperature flue gas is more than or equal to 900 DEG C; the high-temperature flue gas is subjected to dust removing treatment to obtain high-temperature dust-free flue gas; raw material coal is pyrolyzed by using at least part of the high-temperature dust-free flue gas asa pyrolysis heat source to obtain pyrolyzed oil gas and clean coal, and medium-temperature dust-free flue gas is obtained after the pyrolysis heat exchange of the raw material coal with the high-temperature dust-free flue gas; the raw material coal is pyrolyzed by using at least part of the medium-temperature dust-free flue gas as a drying heat source; and after heating drying is completed, the medium-temperature dust-free flue gas is cooled as heat exchange flue gas. According to the present invention, the high-temperature flue gas is used as the heat source for the raw material coal pyrolysis after the dust removing treatment, such that the co-production of the power plant and the clean coal production is achieved; and the medium-temperature dust-free flue gas as the drying heat sourceperforms heating drying on the raw material coal so as to achieve the recovery and utilization of heat.
Description
technical field [0001] The invention relates to the field of coal chemical industry, in particular to a cogeneration system and method for a power plant and clean coal. Background technique [0002] Scattered burning of coal is one of the main causes of air pollution. Compared with coal-fired power plants, the quality of coal at the consumption end is poor and pollutant control is difficult. The use of coal graded refining technology can extract volatile matter in coal as high value-added products (tar and gas), while sulfur and volatile matter in coal are partially removed to obtain clean coal (semi-coke). Clean coal (semi-coke) obtained through the above means can significantly reduce pollutant emissions during combustion. Therefore, an organized supply of clean coal to the periphery of large cities to replace the original low-quality loose-fired coal is a solution to the pollution caused by coal burning in my country. valid path. However, the current mainstream graded re...
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IPC IPC(8): C10B53/04C10B57/10C10B57/00
CPCC10B53/04C10B57/00C10B57/10
Inventor 董斌琦顾大钊赵永宏陈振龙杜万斗李井峰袁明郝兴辉卓卉王丹妮曹志国张凯于瑞雪张勇
Owner CHINA SHENHUA ENERGY CO LTD