CN212109718U

CN212109718U - Flue gas heat exchanger

Info

Publication number: CN212109718U
Application number: CN201922218569.6U
Authority: CN
Inventors: 张英俊; 姚建军
Original assignee: Guangzhou Raschka Engineering Technology Co ltd
Current assignee: Guangzhou Raschka Engineering Technology Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-12-08
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses a flue gas heat exchanger, including the heat transfer main part, the heat transfer main part includes the casing and installs the heat exchange tube that sets up side by side at inside a plurality of intervals of casing, and each heat exchange tube is made by carborundum material or carbon fiber material, and carborundum and carbon fiber material chemical property are stable, heat conductivility is high, coefficient of thermal expansion is little, and corrosive substance in the flue gas can not produce the corruption to heat exchange tube and casing, has improved flue gas heat exchanger's life greatly. This utility model is used for the heat exchanger field.

Description

Flue gas heat exchanger

Technical Field

The utility model relates to a heat exchanger field especially relates to a gas heater.

Background

With the economic development of China, the living standard of people is improved day by day, and the environmental problem becomes a hot spot of attention of the masses. At present, in the field of domestic waste and industrial waste treatment, the proportion of final treatment by adopting an incineration method is increasingly enlarged, and how to effectively reduce secondary pollution of flue gas generated after incineration at low cost becomes one of hot problems in the industry.

In the existing flue gas purification system for incineration treatment of household garbage and industrial waste gas, in order to achieve the related process purpose, the flue gas needs to be heated, so that the flue gas has higher temperature before being discharged into the atmosphere (facilitating the diffusion of pollutants therein) or reaches the temperature required by the subsequent flue gas treatment process (preventing 'white smoke').

In the existing flue gas heating method, carbon steel pipes or stainless steel are mostly adopted as heat transfer materials, and due to the physicochemical characteristics of the carbon steel and the stainless steel, the flue gas side corrosion in a certain temperature range cannot be resisted, so that the heating equipment is often corroded, and the heating equipment cannot be used for a long time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a longe-lived flue gas heat exchanger.

The utility model adopts the technical proposal that:

a flue gas heat exchanger, comprising:

the heat exchange device comprises a heat exchange main body, a heat exchange main body and a heat exchanger, wherein the heat exchange main body comprises a shell and a plurality of heat exchange tubes which are arranged in parallel at intervals and are arranged in the shell, and each heat exchange tube is made of a silicon carbide material or a carbon fiber material;

the left side and the right side of the heat exchange main body are respectively provided with a flue gas inlet section and a flue gas outlet section;

and the upper end and the lower end of the heat exchange main body are respectively provided with a heat exchange medium inlet and a heat exchange medium outlet.

Further conduct the utility model discloses technical scheme's improvement, the flue gas import section and the flue gas export section of heat transfer main part and adopt fibre reinforced composite, lining to glue anticorrosive setting with the casing of flue gas contact.

Further conduct the utility model discloses technical scheme's improvement, each the heat exchange tube runs through the upper and lower both ends of casing, each the both ends of heat exchange tube are provided with the female pipe of first female pipe and second respectively, the medium before the heat transfer is collected to the first female pipe, the medium after the heat transfer is collected to the female pipe of second.

The utility model has the advantages that: this gas heater, including the heat transfer main part, the heat transfer main part includes the casing and installs the heat exchange tube that sets up side by side at inside a plurality of intervals of casing, and each heat exchange tube is made by carborundum material or carbon fiber material, and carborundum and carbon fiber material chemical property are stable, the heat conductivility is high, coefficient of thermal expansion is little, and corrosive substance in the flue gas can not produce the corruption to heat exchange tube and casing, has improved gas heater's life greatly.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, a flue gas heat exchanger includes a heat exchange body 100. The heat exchange main body 100 comprises a shell 101 and a plurality of heat exchange tubes 102 arranged in parallel at intervals in the shell 101, wherein each heat exchange tube 102 is made of a silicon carbide material or a carbon fiber material; the left side and the right side of the heat exchange main body 100 are respectively provided with a flue gas inlet section 103 and a flue gas outlet section 104; the upper and lower ends of the heat exchange main body 100 are respectively provided with a heat exchange medium inlet 105 and a heat exchange medium outlet 106. The heat exchange tube 102 made of silicon carbide, carbon fiber materials and carbon fiber materials has stable chemical property, high heat conduction performance and small thermal expansion coefficient, corrosive substances in smoke cannot corrode the heat exchange tube and the shell, and the service life of the smoke heat exchanger is greatly prolonged.

In one embodiment, the flue gas inlet section 103 and the flue gas outlet section 104 of the heat exchange body 100 and the shell in contact with the flue gas are provided with fiber reinforced composite material and lining rubber for corrosion prevention. The smoke heat exchanger and the shell 101 contacted with smoke are protected from corrosion by lining FRP/lining rubber; the carbon fiber heat exchange tubes penetrate through the heat exchange main body 100 and then are gathered by adopting a header outside the flue gas side, the heat exchange medium runs through the heat exchange tube pass, and the flue gas runs through the shell pass. Due to the chemical stability of the carbon fiber material and the corrosion resistance of the FRP/rubber lining material, even if corrosive substances such as SO2, SO3, HCl, NOx, dust and the like exist in the flue gas, the corrosion effect of the flue gas on the carbon fiber heat exchanger in the heat exchange process can be basically ignored.

Each heat exchange tube 102 penetrates through the upper end and the lower end of the shell 101, a first main tube 200 and a second main tube 300 are respectively arranged at the two ends of each heat exchange tube 102, a medium before heat exchange is collected in the first main tube 200, and a medium after heat exchange is collected in the second main tube 300. The flue gas flows from the left side to the right side, the heat exchange medium is distributed into the heat exchange tube 102 by the first main tube 200, heat is conducted to the outer side of the heat exchange tube 102 from the inner side of the heat exchange tube 102 to exchange heat with the flue gas, and the heat exchange medium after heat exchange is led out from the second main tube 300 at the lower part of the flue gas heat exchanger, so that the purpose of heat exchange of the flue gas is achieved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A flue gas heat exchanger, comprising:

the heat exchange device comprises a heat exchange main body, a heat exchange main body and a heat exchanger, wherein the heat exchange main body comprises a shell and a plurality of heat exchange tubes which are arranged in parallel at intervals and are arranged in the shell, and the heat exchange tubes are made of silicon carbide or carbon fiber;

2. The flue gas heat exchanger of claim 1, wherein: the shell of the heat exchange main body, which is in contact with the flue gas, is anticorrosive by adopting fiber reinforced composite materials and lining rubber.

3. The flue gas heat exchanger of claim 1, wherein: the heat exchange tubes penetrate through the upper end and the lower end of the shell, a first main tube and a second main tube are arranged at the two ends of each heat exchange tube respectively, the first main tube collects media before heat exchange, and the second main tube collects media after heat exchange.