A method for arranging the radiant heating surface of a supercritical carbon dioxide boiler
A radiant heating surface, carbon dioxide technology, applied in the direction of indirect carbon dioxide emission reduction, combustion methods, steam boilers, etc., can solve the problem of reducing the peak temperature of the tube wall temperature of the main working medium radiation heating surface, supercritical carbon dioxide water-cooled wall tube wall temperature, etc. , to achieve the effects of reducing the wall temperature difference, improving safety, and reducing the pipe wall temperature
Active Publication Date: 2018-06-22
HUANENG POWER INT INC +1
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Problems solved by technology
[0006] The object of the present invention is to solve the problem of high temperature of the supercritical carbon dioxide water wall tube wall, and provide a supercritical carbon dioxide boiler radiant heating surface layout method, which can effectively reduce the radiation of the main working medium of the high parameter supercritical carbon dioxide boiler The wall temperature difference value of the tube wall temperature of the heating surface along the height direction of the furnace reduces the peak value of the tube wall temperature of the main working fluid radiation heating surface
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[0018] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
[0019] The present invention is described by taking the π-type boiler as an example, but not limited to the π-type boiler.
[0020] see figure 1 , the present invention includes the radiation heating surface arranged in the furnace, and the radiation heating surface includes two parts: the reheating working fluid radiation heating surface 1 (equivalent to "secondary steam-water cold wall") and the main working fluid radiation heating surface 2 (equivalent to "A Soda Cold Wall"). The main working fluid radiation heating surface 2 is arranged in the surrounding area of the burner 9, the upper area of the burner 9 and the furnace roof, and the reheated working fluid radiation heating surface 1 is arranged in the lower area of the burner 9 and the cold ash hopper area. Both the reheated working fluid radiation heating surface 1 and the main working f...
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The invention discloses an arrangement method for a radiation heating surface of a supercritical carbon dioxide boiler. A main working medium radiation heating surface and a reheated working medium radiation heating surface are arranged in a hearth, wherein the main working medium radiation heating surface is arranged in a combustor area, an area above a combustor and the top of the hearth; the reheated working medium radiation heating surface is arranged in an area below the combustor and a cold ash hopper area. By adopting the arrangement method, an inlet segment of the main working medium radiation heating surface is just positioned in an area close to the combustor, namely, a tube segment at which the working medium temperature in the whole hearth is lowest is arranged in an area in which a thermal load distribution coefficient is highest along the height direction of the hearth, so that the problem that the temperature on a tube wall of the radiation heating surface of the high-parameter supercritical carbon dioxide boiler is over high is solved, the boiler security is improved, and the requirement of the radiation heating surface of the supercritical carbon dioxide boiler on a high-temperature metal material is lowered.
Description
technical field [0001] The invention belongs to the field of supercritical carbon dioxide Brayton cycle high-efficiency thermal power generation, and in particular relates to a method for arranging a radiation heating surface of a supercritical carbon dioxide boiler. Background technique [0002] The supercritical carbon dioxide Brayton cycle is currently recognized as one of the most potential advanced power cycles. Because supercritical carbon dioxide has the characteristics of high energy density and high heat transfer efficiency, the high-efficiency power generation system of supercritical carbon dioxide Brayton cycle can reach the efficiency of conventional steam Rankine cycle of 700°C in the temperature range of 620°C, and there is no need to develop new superalloys , and the equipment size is smaller than the steam unit with the same parameters, the application prospect is very good. [0003] The composition characteristics of my country's energy reserves determine t...
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IPC IPC(8): F22B31/08F22G7/12F23L15/00
CPCF22B31/08F22G7/12F23L15/00Y02E20/34
Inventor 张一帆李红智姚明宇白文刚杨玉王月明
Owner HUANENG POWER INT INC