Coal powder pressurizing oxygen-enriched combustion settling furnace experimental device

Abstract

The invention discloses a coal powder pressurizing oxygen-enriched combustion settling furnace experimental device. A gas inlet system comprises an oxygen supplying unit and a carbon dioxide supplying unit; a settling furnace comprises a pressure container, a reaction pipe and a slag storage tank which are connected sequentially from the top down, wherein a coal powder feeding machine is fixedly arranged inside the pressure container, and is communicated with the reaction pipe through a blanking pipe, and a heating furnace is arranged on the outer wall of the reaction pipe in a sleeving way; a flue gas analysis system comprises a cooling device, a flue gas flowmeter and a flue gas analysis instrument which are connected sequentially through a pipeline; the gas inlet system is communicated with the blanking pipe through a gas inlet pipeline; and the slag storage tank is communicated with the cooling device through a gas outlet pipeline. According to the invention, continuous feeding of coal powder under the conditions of pressurizing and oxygen enrichment is realized, combustion characteristic parameters of ignition point, combustion temperature, burnout rate of carbon and the like of coal powder under the conditions of different pressures and different O2 / CO2 proportions can be accurately obtained, and meanwhile, flue gas components of coal powder combustion can be analyzed, so as to obtain the generation characteristics of pollutants under the conditions of pressurizing and oxygen enrichment.

Description

technical field [0001] The invention relates to a pulverized coal combustion subsidence furnace, in particular to an experimental device for a pulverized coal pressurized oxygen-enriched combustion subsidence furnace. Background technique [0002] It is well known that global warming is due to CO 2 represented by large amounts of greenhouse gas emissions. Relevant data show that the coal consumption of thermal power generation accounts for more than 50% of my country's raw coal output, and the CO produced by direct combustion of pulverized coal 2 It is the main source of my country's carbon emissions. Therefore, how to reduce CO in thermal power generation 2 emissions is of great significance to my country's energy conservation and emission reduction. [0003] Currently, for coal-fired power plants CO 2 The capture technology mainly has the following three aspects: [0004] (1) Capture after combustion: This capture method is theoretically suitable for any thermal powe...

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Problems solved by technology

[0008] At present, the research on pressurized oxygen-enriched combustion technology of pulverized coal at home and abroad is still in the experimental stage, and the research on the combustion characteristics of pulverized coal under pressure conditions mostly uses pressurized thermogravimetric analyzer equipment. The disadvantage of pressurized thermogravimetric analyzer equipment is that : 1) The disadvantage of the pressurized thermogravimetric analyzer is that the pulverized coal sample is fixed, and the pulverized coal combustion in the flowing state cannot be studied, while the pulverized coal in the pulverized coal boiler enters the combustion chamber together with the air and is in a flowing state. Therefore, there is a large error between the experimental results of the thermogravimetric analyzer and the real situation; 2) The pressurized thermogravimetric analyzer has the disadvantages of small sample size, low pressure, and slow heating rate, which is different from the combustion of pulverized coal in the actual boiler. The situation is quite different, and it cannot truly reflect the combustion characteristic parameters of pulverized coal under pressure.

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