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An air preheater with an airtight structure

An air preheater and air-sealing technology, applied in the heat exchanger shell, heat transfer modification, heat exchange equipment, etc., can solve the problem of flue gas leakage, flue gas corrosion and aging, flue gas and air heat exchange time Shortage and other problems, to achieve the effect of improving preheating efficiency and preventing flue gas leakage

Active Publication Date: 2022-01-07
老河口新景科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcoming of the heat exchange time between flue gas and air in the prior art, and the flue gas is easy to corrode the aging sealing ring and cause the flue gas to leak out, and proposes an air preheating system with an airtight structure. device

Method used

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  • An air preheater with an airtight structure
  • An air preheater with an airtight structure
  • An air preheater with an airtight structure

Examples

Experimental program
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Effect test

Embodiment 1

[0022] refer to Figure 1-5 , an air preheater with an air-tight structure, including a shell 1 and an end cover 2, the two ends of the shell 1 are fixedly installed with an end cover 2, and the outer surfaces of the shell 1 and the end cover 2 are sprayed with Insulation layer to reduce flue gas heat loss. A hollow cylinder 3 is arranged in the middle of the casing 1 , and the hollow cylinder 3 is arranged to allow the flue gas to conduct sufficient heat exchange with the air in the straight pipe 6 . And the hollow cylinder 3 is arranged coaxially with the shell 1, and the two ends of the hollow cylinder 3 are fixedly installed with a cylindrical tube 4, and the cylindrical tube 4 is arranged coaxially with the hollow cylinder 3, and the outer end of the cylindrical tube 4 is arranged coaxially. Both are designed with openings, and the outer surface of the cylindrical tube 4 is fixedly installed with a number of evenly distributed elbows 5 along the circumferential direction...

Embodiment 2

[0028] refer to Figure 6-7 , as another preferred embodiment of the present invention, the difference from Embodiment 1 is that the airtight member 103 includes an airtight ring 103a, an annular groove 103b, and a vent pipe 103c. The outer end surface of the ring 103b is fixedly provided with a ventilation pipe 103c which is communicated with the inside of the annular groove 103b. The outer end of the ventilation pipe 103c extends outward until passing through the third sealing ring 104 and the fixing ring 105. A sealing cover is installed, and high-pressure gas is introduced into the annular groove 103b through the ventilation pipe 103c. By using the vent pipe 103c to pass high-pressure gas into the airtight member 103, it is very convenient to operate. During daily use, the pressure of the high-pressure gas can be checked regularly. to fill.

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Abstract

The invention relates to the technical field of air preheaters, in particular to an air preheater with an airtight structure. End covers are fixedly installed on both ends of the shell, and a hollow cylinder is arranged in the middle of the shell. Both ends are fixed with cylindrical tubes, and the outer surface of the cylindrical tubes is fixed with a number of evenly distributed curved pipes along the circumference, and straight pipes are fixedly arranged between every two corresponding curved pipes. The fixed sleeves are equipped with a number of rotating sleeves distributed at equal intervals, the rotating sleeves are equipped with fans, and the openings at the outer ends of the cylindrical tubes are fixedly welded with connecting pipes, and the outer ends of each connecting pipe extend outward until passing through For the end cap, each connecting pipe is fixed with a mounting ring on the pipe body outside the end cap, and the installation is fixed on the outer surface of the end cap by bolts, and each end cap is provided with an airtight structure surrounding the connecting pipe. The invention has the advantages of good preheating effect and can prevent smoke leakage.

Description

technical field [0001] The invention relates to the technical field of air preheaters, in particular to an air preheater with an airtight structure. Background technique [0002] Air preheater is a kind of equipment that uses high temperature flue gas and cold air for heat exchange, so that the temperature of flue gas is lowered after releasing heat, and then sent to the chimney for discharge; the temperature of the air is increased after absorbing heat, and it is sent to the combustion system to participate in the combustion. It is widely used in the field of recovery of waste heat from heating furnace flue gas. In the existing air preheater, because the flue gas enters the preheater, the passing speed of the flue gas is not sufficiently slowed down, resulting in a short heat exchange time between the flue gas and the air, so that the air does not absorb enough heat from the flue gas, and at the same time. The sealing ring installed between the connecting pipe and the shel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L15/04F28F9/10F28F13/12
CPCF23L15/04F28F9/10F28F13/12Y02E20/34
Inventor 程曦柳忠操
Owner 老河口新景科技有限责任公司