CN210772278U

CN210772278U - Heat pipe type air preheater with completely isolated air-smoke system

Info

Publication number: CN210772278U
Application number: CN201921710238.8U
Authority: CN
Inventors: 王恒; 王广兵; 刘龙; 王常臻
Original assignee: CHN Energy Heze Power Generation Co Ltd
Current assignee: CHN Energy Heze Power Generation Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-06-16
Anticipated expiration: 2029-10-12

Abstract

The utility model discloses a heat pipe type air preheater with completely isolated air-smoke system, which comprises an air preheating box body, a first heat pipe group, a second heat pipe group and a third heat pipe group; the air preheater is divided into two independent channels by the sealing partition plate, and air and smoke flow in the independent channels respectively, so that the aim of zero air leakage rate of the air preheater can be fulfilled; the heat pipe is used as a basic heat exchange unit to be applied to the air preheater, the problem of small flow gap of flue gas and air in the heat exchanger is fundamentally solved through the characteristics of heat exchange outside the pipe of the heat pipe, and the problems of the most troublesome blockage and high differential pressure of the existing air preheater are thoroughly solved; the wear-resistant anticorrosive coating is coated on the outer surface of the heat pipe, so that the problems of air preheater sticking, blockage and low-temperature corrosion caused by the denitration and SCR system operation can be fundamentally solved; not only saves energy and reduces consumption, but also improves and enhances the reliability of the safe operation of the unit.

Description

Heat pipe type air preheater with completely isolated air-smoke system

Technical Field

The utility model relates to a heat exchanger technical field, specific theory especially relates to a heat pipe formula air heater that wind cigarette system keeps apart completely and arranges.

Background

The air preheater is the main equipment of the tubular heating furnace device for recovering the waste heat of the flue gas. The temperature of flue gas discharged from the convection section of the tubular heating furnace is about 300-400 ℃; under the condition of unchanged excess air coefficient, the heat efficiency of the tubular heating furnace is improved by about 1 percent when the smoke discharge temperature is reduced by 20 ℃. Accordingly, various air preheaters have been widely used. At present, the air preheaters used on industrial heating furnaces in the fields of petroleum refining, petrochemical industry, coal chemical industry and the like mainly comprise a hot oil type air preheater, a rotary type air preheater, a steel pipe type air preheater, a glass pipe air preheater, a heat pipe type air preheater, a water heating medium air preheater and the like, and in addition, a combined type air preheater is also provided. The combined air preheater is formed by combining several types of air preheaters; various types of air preheaters are used for different heat exchange temperature sections, respective characteristics can be fully exerted, problems are avoided, and a good using effect is achieved.

At present, most of air preheaters of units of more than 300MW which run online in China are rotary air preheaters, in order to meet the national requirements on environmental protection indexes and achieve ultralow emission, most of the units in China are additionally provided with a denitration system, the traditional rotary air preheaters are more seriously blocked due to the input of SCR, and the problem of blockage cannot be thoroughly solved by periodical soot blowing and cleaning; the blockage problem is increasingly serious, so that the problems of high air leakage, high differential pressure, difficult maintenance and the like of the rotary air preheater are more obvious, and the economical efficiency and the safety of the operation of the boiler are reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat pipe formula air heater that wind cigarette system isolated arrangement completely to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a heat pipe type air preheater with a completely isolated air-smoke system comprises an air preheating box body, wherein a first heat pipe set, a second heat pipe set and a third heat pipe set are sequentially arranged in the air preheating box body from the front end to the rear end; a sealing partition plate is arranged in the middle of the first heat pipe set, the second heat pipe set and the third heat pipe set; the first heat pipe set is a low-temperature area, the second heat pipe set is a medium-temperature area, and the third heat pipe set is a high-temperature area; a heat pipe heat absorption end is arranged on the right side of the sealing partition plate, a flue gas inlet is formed in the air preheating box body, far away from the second heat pipe group, of a third heat pipe group in the heat pipe heat absorption end, and a flue gas outlet is formed in the air preheating box body, far away from the second heat pipe group, of the first heat pipe group in the heat pipe heat absorption end; the left side of the sealing partition plate is provided with a heat pipe heat release end, an air outlet is formed in the air preheating box body, far away from the second heat pipe group, of the third heat pipe group in the heat pipe heat release end, and an air inlet is formed in the air preheating box body, far away from the second heat pipe group, of the first heat pipe group in the heat pipe heat release end.

Preferably, the outer surface of the heat pipe is coated with a wear-resistant and corrosion-resistant coating.

Preferably, the first heat pipe set, the second heat pipe set and the third heat pipe set penetrate through the sealing partition plate, and holes matched with the first heat pipe set, the second heat pipe set and the third heat pipe set are formed in the sealing partition plate.

Preferably, the wear-resistant and corrosion-resistant coating is a boron oxide layer.

Preferably, the first heat pipe set, the second heat pipe set and the third heat pipe set penetrate through the sealing partition plate, and sealing rings are arranged on the sealing partition plate.

Has the advantages that: compared with the prior art, the beneficial effects of the utility model are that: the air preheater is divided into two independent channels by the sealing partition plate, and air and smoke flow in the independent channels respectively, so that the aim of zero air leakage rate of the air preheater can be fulfilled; the heat pipe is used as a basic heat exchange unit to be applied to the air preheater, the problem of small flow gap of flue gas and air in the heat exchanger is fundamentally solved through the characteristics of heat exchange outside the pipe of the heat pipe, and the problems of the most troublesome blockage and high differential pressure of the existing air preheater are thoroughly solved; the wear-resistant anticorrosive coating is coated on the outer surface of the heat pipe, so that the problems of air preheater sticking, blockage and low-temperature corrosion caused by the denitration and SCR system operation can be fundamentally solved; not only saves energy and reduces consumption, but also improves and enhances the reliability of the safe operation of the unit.

Drawings

Fig. 1 is the utility model provides a structural schematic diagram of a heat pipe formula air heater that wind smoke system isolated arrangement completely.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Examples

Referring to fig. 1, in an embodiment of the present invention, a heat pipe type air preheater with completely isolated arrangement of a flue gas system includes an air preheating box 1, wherein a first heat pipe set 2, a second heat pipe set 3, and a third heat pipe set 4 are sequentially and respectively disposed in the air preheating box 1 from a front end to a rear end; a sealing partition plate 5 is arranged in the middle of the first heat pipe group 2, the second heat pipe group 3 and the third heat pipe group 4; the first heat pipe set 2 is a low-temperature area 8, the second heat pipe set 3 is a medium-temperature area 7, and the third heat pipe set 4 is a high-temperature area 6; a heat pipe heat absorption end 10 is arranged on the right side of the sealing partition plate 5, a smoke inlet 13 is arranged on the air preheating box body 1, far away from the second heat pipe group 3, of the third heat pipe group 4 in the heat pipe heat absorption end 10, and a smoke outlet 14 is arranged on the air preheating box body 1, far away from the second heat pipe group 3, of the first heat pipe group 2 in the heat pipe heat absorption end 10; the left side of the sealing partition plate 5 is provided with a heat pipe heat release end 9, an air outlet 11 is arranged on the air preheating box body 1, far away from the second heat pipe group 3, of the third heat pipe group 4 in the heat pipe heat release end 9, and an air inlet 12 is arranged on the air preheating box body 1, far away from the second heat pipe group 3, of the first heat pipe group 2 in the heat pipe heat release end 9.

Furthermore, the outer surface of the heat pipe is coated with a wear-resistant and corrosion-resistant coating.

Further, the first heat pipe group 2, the second heat pipe group 3 and the third heat pipe group 4 penetrate through the sealing partition plate 5, and holes matched with the first heat pipe group 2, the second heat pipe group 3 and the third heat pipe group 4 are formed in the sealing partition plate 5.

Further, the wear-resistant and corrosion-resistant coating is a boron oxide layer.

Furthermore, sealing rings are arranged at the positions where the first heat pipe set 2, the second heat pipe set 3 and the third heat pipe set 4 penetrate through the sealing partition plate 5.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides a heat pipe formula air heater that wind smoke system isolated arrangement completely which characterized in that: the air preheating device comprises an air preheating box body, wherein a first heat pipe group, a second heat pipe group and a third heat pipe group are sequentially arranged in the air preheating box body from the front end to the rear end; a sealing partition plate is arranged in the middle of the first heat pipe set, the second heat pipe set and the third heat pipe set; the first heat pipe set is a low-temperature area, the second heat pipe set is a medium-temperature area, and the third heat pipe set is a high-temperature area; a heat pipe heat absorption end is arranged on the right side of the sealing partition plate, a flue gas inlet is formed in the air preheating box body, far away from the second heat pipe group, of a third heat pipe group in the heat pipe heat absorption end, and a flue gas outlet is formed in the air preheating box body, far away from the second heat pipe group, of the first heat pipe group in the heat pipe heat absorption end; the left side of the sealing partition plate is provided with a heat pipe heat release end, an air outlet is formed in the air preheating box body, far away from the second heat pipe group, of the third heat pipe group in the heat pipe heat release end, and an air inlet is formed in the air preheating box body, far away from the second heat pipe group, of the first heat pipe group in the heat pipe heat release end.

2. A heat pipe air preheater with fully isolated flue gas system according to claim 1, wherein: the outer surface of the heat pipe is coated with a wear-resistant and anti-corrosion coating.

3. A heat pipe air preheater with fully isolated flue gas system according to claim 1, wherein: the first heat pipe set, the second heat pipe set and the third heat pipe set penetrate through the sealing partition plate, and holes matched with the first heat pipe set, the second heat pipe set and the third heat pipe set are formed in the sealing partition plate.

4. A heat pipe air preheater with fully isolated flue gas system according to claim 2, wherein: the wear-resistant anticorrosive coating is a boron oxide layer.

5. A heat pipe air preheater with fully isolated flue gas system according to claim 3, wherein: and sealing rings are arranged at the positions of the first heat pipe set, the second heat pipe set and the third heat pipe set, which penetrate through the sealing partition plate.