Layout induced draft fan outlet confluence flue structure

Abstract

The invention discloses a layout induced draft fan outlet confluence flue structure, and relates to the technical field of coal-fired generator sets, the layout induced draft fan outlet confluence flue structure comprises a main flue, and the bottom of the main flue is fixedly connected with a first induced draft fan flue and a second induced draft fan flue; a sealing assembly and a pulling mechanism are installed in the first induced draft fan flue and the second induced draft fan flue; the top of the sealing assembly is fixedly connected with a cleaning assembly; and a turning structure is mounted at the end part of the main flue. For the original confluence flue at the outlet of the induced draft fan, the backward flow condition of the flue can be effectively prevented, and the condition that the induced draft fan equipment is seriously corroded due to the backward flow of the flue gas is greatly reduced; the flue gas backflow phenomenon of the outlet confluence flue of the induced draft fan in a 'two-furnace one-tower' layout mode is avoided, the operation safety of the induced draft fan and an air and flue system is remarkably improved, flue gas backflow in the outlet confluence flue of the induced draft fan is prevented, and the operation safety and reliability of the induced draft fan are improved.

Description

technical field [0001] The invention relates to the technical field of coal-fired generating sets, in particular to a confluence flue structure at the outlet of a layout induced draft fan. Background technique [0002] The working principle of the coal-fired generator set is to convert the heat energy generated by coal combustion into electrical energy through the power generation power device (power plant boiler, steam turbine, generator and its auxiliary devices, etc.). Coal-fired power generation has a long history and is also a relatively important one; coal-fired power generation units are mainly composed of combustion systems (with boilers as the core), steam-water systems (mainly composed of various pumps, feed water heaters, condensers, pipelines, water-cooled walls etc.), electrical system (mainly turbogenerator, main transformer, etc.), control system, etc. The former two generate high-temperature and high-pressure steam; the electrical system realizes the transfo...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem in the prior art that when one unit is running, the positive-pressure flue gas in the confluence flue at the outlet of the induced draft fan will flow backward into the induced draft fan equipment of the out-of-service unit

Because the sulfur content of the flue gas is high, the cooling of the inverted flue gas will cause serious corrosion problems in the induced draft fan equipment, which will affect the operation reliability of the induced draft fan equipment, and the proposed layout of the induced draft fan outlet Combined flue structure

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