Coal pyrolysis steam, tar and gas cogeneration system and process based on pulverized coal furnace
A technology for pyrolysis of coal gas and pulverized coal furnace, which is applied in the petroleum industry, coke oven, gas dust removal, etc., can solve the problems of pollution and low energy utilization rate, and achieve the effect of low pollutant emission
Active Publication Date: 2022-05-10
HUANENG POWER INT INC +2
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Problems solved by technology
[0005] The purpose of the present invention is to provide a boiler that can not only maintain the output of the original boiler, but also by-produce products such as gasoline and diesel, pyrolysis gas, etc., so as to realize the clean and efficient utilization of coal, thereby solving the problem of low energy utilization in the current small and medium coal-fired boilers , coal pyrolysis steam, tar and gas cogeneration system and process based on pulverized coal furnace with serious pollution problems
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[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0027] Such as figure 1 As shown, the present invention includes pulverized coal boiler system, coal grinding and feeding system, pyrolysis system and pyrolysis product separation and purification device;
[0028] The pulverized coal boiler includes a pulverized coal furnace 5 with a burner 4 and a panel superheater 6, a high temperature superheater 7 and a low temperature superheater 8 arranged in its flue and connected to the boiler feed water system. An air preheater 11 is installed at the tail, the inlet of the air preheater 11 is connected with a blower 12, and the outlet is connected with the burner 4;
[0029] The coal grinding and feeding system is connected to the pyrolysis system 9 arranged in the flue of the pulverized coal furnace 5, and the high-temperature pyrolysis products after passing through the pyrolysis system 9 are sent to the separatio...
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Abstract
A coal pyrolysis steam, tar and gas cogeneration system and process based on a pulverized coal furnace. Firstly, after the coal is ground to a certain particle size, the recycled pyrolysis gas pressurized by a fan is transported to the flue of the pulverized coal furnace. In the coil-type pyrolysis system, pyrolysis occurs through heat exchange with the high-temperature flue gas at the furnace outlet, and the semi-coke and high-temperature pyrolysis gas produced by pyrolysis are sent to the cyclone separator, and the separated semi-coke is sent to the pulverized coal furnace for combustion After the high-temperature gas is cooled and separated to separate the tar, part of it is used as a pneumatic conveying medium for pyrolysis pulverized coal, and the remaining gas enters the post-processing system to synthesize downstream chemical products, and the obtained tar can be hydrogenated and refined to produce fuel oil after dehydration and purification; In the present invention, the coil-type pyrolyzer is placed inside the flue of the pulverized coal furnace, and the heat of the high-temperature flue gas is used to pyrolyze the pulverized coal, which reduces the heat loss in the process of heat transfer in the form of a heat carrier, and has a high energy utilization rate; Coupling the pyrolysis furnace through the method of the invention realizes the staged conversion and utilization of coal.
Description
technical field [0001] The invention belongs to the field of coal pyrolysis graded conversion polygeneration technology, and in particular relates to a coal pyrolysis steam, tar and coal gas cogeneration system and technology based on a pulverized coal furnace. Background technique [0002] my country's coal resources are relatively abundant, and the energy structure is characterized by "lack of oil, less gas, and coal". According to BP's "World Energy Statistical Yearbook 2015", coal is still the leading fuel for my country's energy consumption, accounting for 66%, while my country's coal About 80% of electricity is produced by direct combustion, which is not only inefficient, wastes resources, but also pollutes the environment. The environmental problems caused by this have seriously affected the sustainable development of our country. At the same time, my country's natural gas demand is on the rise. China's fossil energy consumption of natural gas is the fastest growing. I...
Claims
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IPC IPC(8): C10B53/04C10G1/00C10K1/02C10K1/04
CPCC10B53/04C10G1/00C10K1/026C10K1/046Y02P20/129
Inventor 肖平王勤辉申建汛时正海骆仲泱方梦祥李开坤林伟荣
Owner HUANENG POWER INT INC