Economizer for boiler unit denitrification system
A technology for boiler units and economizers, applied in feed water heaters, preheating, steam generation, etc., to achieve the effects of easy disassembly and maintenance, complete denitrification, and stable structure
Active Publication Date: 2016-03-23
河北大唐国际丰润热电有限责任公司 +1
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Problems solved by technology
At present, there is no effective solution for the arrangement of pipe rows in the graded economizer and the installation structure of the graded economizer, which is a major shortcoming in this field
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0021] See attached Figure 1-4 The economizer for the boiler unit denitrification system disclosed in the present invention includes an upper-level economizer and a lower-level economizer connected in series. The boiler body is connected with the denitration reactor through the flue, the upper economizer is installed in the tail flue of the boiler body, the lower economizer is installed at the outlet of the denitrification reactor, the upper economizer is connected with the water supply pipe, and the lower economizer The coal burner is connected to the outlet pipe; a denitrification reactor is respectively installed on both sides of the center line of the boiler body.
[0022] The upper-level economizer is made by cutting the original economizer in layers to reduce the heat exchange area. The hanging method remains unchanged, and the flow rate of wor...
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An economizer for a denitrification system of a boiler unit, including an upper economizer and a lower economizer, the lower economizer includes left and right lower economizers; the left and right lower economizers are respectively hoisted by a suspension mechanism Setting; the two ends of the outlet headers of the two lower economizers are respectively installed on the boiler structural beam; the inlet header is fixedly installed on the flue structure, and the hanging plate is fixedly connected with the lower wing plate of the hanging beam, and the elevator plate passes through The boom is connected with the hanging plate, the elevator plate is a rectangular orifice plate, and the pipe row of the lower economizer is inserted into the through hole on the elevator plate. This kind of economizer has a stable structure, and the lower economizer does not directly contact the boiler body, so that even under the low-load state of the coal-fired unit, the temperature of the flue gas entering the denitration reactor can meet the requirements of the denitration reaction, thereby ensuring that the flue gas The denitrification is complete; the pipe arrangement and suspension mode of the lower economizer are convenient for the disassembly and maintenance of the staff, and the work efficiency and work quality are improved.
Description
technical field [0001] The invention relates to a coal economizer, in particular to a coal economizer for a denitrification system of a boiler unit. Background technique [0002] For the economizer used in the denitrification system of the coal-fired boiler, its outlet flue gas is first introduced into the SCR denitrification reactor for denitrification, and then enters the air preheater. The economizer is generally installed at the tail flue of the boiler body. Due to the large heat exchange area and sufficient heat exchange of the economizer on the boiler body, the flue gas temperature at the inlet of the SCR denitrification reactor is low when the unit is under low load conditions. , causing the SCR to fail to work normally, seriously affecting the normal production and polluting the environment. [0003] Although the structure of graded economizers has appeared, the installation position and installation accuracy of the lower-level economizers are closely related to the...
Claims
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IPC IPC(8): F22D1/00F23J15/00
Inventor 代东方占岭谢宝东项建伟张卫宝吴磊李建军安德盛季建良季益冰田瑞军常景泉
Owner 河北大唐国际丰润热电有限责任公司