Rotary air preheater with hierarchical reverse rotation

An air preheater and reverse rotation technology, which is applied in lighting and heating equipment, combustion methods, indirect carbon dioxide emission reduction, etc., can solve the problems of low workmanship capacity and low utilization efficiency of flue gas waste heat, etc., to reduce deviation and reduce heat Deviation, the effect of avoiding condensation

Inactive Publication Date: 2015-11-04
TSINGHUA UNIV +2
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low working capacity of the rotary air preheater (the efficiency of heating condensate water is about

Method used

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  • Rotary air preheater with hierarchical reverse rotation
  • Rotary air preheater with hierarchical reverse rotation

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[0013] The working principle, specific structure and an implementation method of the present invention will be further explained below in conjunction with the accompanying drawings:

[0014] figure 1 It is a schematic diagram of the structure of a conventional rotary air preheater. Its basic structure includes the housing 1, the rotor 2, the bearing 3, and the sealing device. The casing, sealing device, inlet and outlet air duct, and flue divide the rotary air preheater into two parts: the flue gas side and the oncoming air side. The hot flue gas passes through the flue gas side from top to bottom to heat the rotor in this area, and the heated rotor turns to the air side, thereby heating the air flowing from the bottom up in the area. Since the heated rotor rotates in a clockwise direction and passes through the air side and is gradually cooled, the temperature of the rotor in the air area that passes first is high, and the temperature of the rotor in the air area that passes lat...

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Abstract

The invention provides a rotary air preheater with hierarchical reverse rotation, relating to equipment of heating cold air by using low temperature hot gas. The rotary air preheater comprises a shell, at least two stages of rotors, a bearing, a gas channel and an air channel. The multiple stages of rotors are arranged in series. A reverse transmission device is arranged between the rotation shafts of two adjacent stages of rotors, the rotation directions of two adjacent stages of rotors are opposite, radial sealing pieces are arranged at the junctions of adjacent channels between the two adjacent stages of rotors, and circumferential sealing pieces are arranged at rotor and shell gaps between the two adjacent stages of rotors. Through different rotation directions of front and back stages of rotors, a rotor hot storage piece which is cooled by air is alternatively heated by two side gas in an air preheater channel, the deviation of boiler flue gas discharge temperature is reduced, thus the early entering of a part of gas in the air preheater channel into a dew point area is avoided, the problems of cold end heat storage piece condensation, dust touch, corrosion, clogging and the like are reduced, the boiler gas discharge temperature is reduced, and the boiler efficiency is improved.

Description

technical field [0001] The invention relates to equipment for heating cold air by using low-temperature hot flue gas in a tail flue of a thermal power plant, and belongs to the technical field of energy and waste heat utilization of flue gas. Background technique [0002] Energy conservation and emission reduction has gradually become a hot topic of global concern. Improving energy utilization and reducing energy consumption has become a historical task for researchers in all walks of life. As a supporting industry for industrial development and social and economic progress, electric power occupies a very important position in the energy structure, among which coal resources consumed by thermal power generation account for about half of the total coal consumption. [0003] For thermal power generation units, under the same steam parameters, the boiler efficiency is the most critical factor affecting the coal consumption of the unit. Under the current technical level, the de...

Claims

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Application Information

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IPC IPC(8): F23L15/00
CPCY02E20/34
Inventor 王卫良吕俊复张海岳光溪刘建民李永生倪维斗
Owner TSINGHUA UNIV
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