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Device capable of enhancing heat transfer and preventing blocking for air preheater

A technology of air preheater and air channel, which is applied in lighting and heating equipment, treatment of combustion products, combustion methods, etc. It can solve problems such as dust blocking, air preheater corrosion, difficulty in taking into account improvement effect and economy, and achieve prevention And the effect of controlling the dust blocking of the air preheater, increasing the metal temperature of the cold end, and preventing the sticking and dust accumulation of ammonium bisulfate

Pending Publication Date: 2019-11-01
HUNAN DATANG ENERGY SAVING SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In solving the problems of air preheater corrosion and clogging, the existing methods are difficult to take into account the improvement effect and economic efficiency. In order to overcome this defect, the present invention provides an air preheater anti-blocking and enhanced heat transfer device

Method used

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  • Device capable of enhancing heat transfer and preventing blocking for air preheater
  • Device capable of enhancing heat transfer and preventing blocking for air preheater

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0026] In the description of the present invention, greater than, etc. are understood as not including the original number, and above, etc. are understood as including the original number, and the first, second, third, and fourth are only for the purpose of distinguishing technical features, and cannot be under...

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Abstract

The invention discloses a device capable of enhancing heat transfer and preventing blocking for an air preheater. The device comprises a surface type heat exchanger, wherein a flue gas channel and anair channel are arranged in the surface type heat exchanger, an inlet of the flue gas channel communicates with an inlet flue of the air preheater through an inlet branch flue, and an outlet of the flue gas channel communicates with an outlet flue of the air preheater through an outlet branch flue; an inlet of the air channel communicates with an inlet air flue, and an outlet of the air channel communicates with an outlet air flue; and the device further comprises a serial air flue used for enabling the outlet air flue to communicate with a cold air pipeline and a parallel air flue used for enabling the outlet air flue to communicate with a hot air pipeline, wherein a first baffle door and a second baffle door are arranged on the serial air flue and the parallel air flue respectively. Thedevice can be switched to a serial, parallel or serial-parallel-mixed mode, the air inlet temperature and the cold end metal temperature of the air preheater can be increased, the air preheater can beprotected and controlled against dust blocking, the cleaning degree of heat exchange elements of the air preheater is improved, the smoke discharge temperature is reduced, and the boiler efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization of boiler flue gas, and in particular relates to an air preheater anti-blocking and heat transfer enhancing device. Background technique [0002] The rotary air preheater is widely used in thermal power boilers with a capacity of 200MW or more. It is a large drum with upper and lower openings. The interior is densely equipped with heat sinks. The flue gas flows from top to bottom, and the heat it carries is absorbed by the heat sinks. The heated radiator moves to the air side with the slow rotation of the air preheater; the air flows from bottom to top, absorbs the heat of the radiator and is preheated to a certain temperature. Among them, the temperature of flue gas and air at the upper end of the air preheater is high, which is called the hot end, and the temperature of flue gas and air at the lower end is low, called the cold end. [0003] The comprehensive temperature at the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/00F23J3/00F23J15/06
CPCF23L15/00F23J15/06F23J3/00Y02E20/34
Inventor 彭永强郑丙文刘良华
Owner HUNAN DATANG ENERGY SAVING SCI & TECH CO LTD
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