CN214065798U

CN214065798U - Flue gas heat exchanger

Info

Publication number: CN214065798U
Application number: CN202022894561.4U
Authority: CN
Inventors: 张雨
Original assignee: Shenyang Linong Straw Fuel Development Co ltd
Current assignee: Shenyang Linong Straw Fuel Development Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-08-27
Anticipated expiration: 2030-12-03

Abstract

The utility model discloses a flue gas heat exchanger, which comprises a housin, the bottom of casing is equipped with the flue gas import, and the top of casing is equipped with the exhanst gas outlet, is equipped with a plurality of heat transfer boards in the casing, is equipped with circulating pipe in the heat transfer board, and circulating pipe' S both ends are equipped with water inlet and delivery port respectively, and the heat transfer board is F shape structure, and the heat transfer board includes horizontal plate, vertical long board, vertical short slab, and per two heat transfer boards are a set of, and the heat transfer board of the same group forms the flue gas runner in the middle of pegging graft each other, and the flue gas runner is S-. Compared with the prior art, the utility model the advantage lie in: the structure is simple, the use is convenient, the volume is small, and the occupied area is small; the structure of heat transfer board, area of contact is big, and the flue gas is under the interception of vertical short slab, vertical long slab, and dwell time is long for heat exchange efficiency is high, and after the heat transfer ended, the flue gas temperature was too high, gets into the casing once more and carries out the heat transfer, improves waste heat recovery rate.

Description

Flue gas heat exchanger

Technical Field

The utility model relates to a technical field is handled to the flue gas, specifically indicates a gas heater.

Background

The flue gas waste heat recovery tower is a device for recovering high-temperature gas discharged from flue gas at the tail part of a boiler through cold water circulation. It can be widely used in civil boiler and industrial boiler. The flue gas waste heat recovery energy-saving device mainly recovers the heat of the flue gas at the tail part of the boiler by utilizing the heat conduction, heat radiation and heat convection principles, thereby reducing the temperature of the flue gas and further reducing the emission of SO2, NO2, dust and harmful gases in the flue gas; meanwhile, the recovered heat energy is used for other purposes; not only realizing the energy saving but also achieving the effect of environmental protection.

The existing heat exchange device has the advantages of small contact area, low heat exchange efficiency, short contact time and large volume.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the defect of above-mentioned technique, provide a gas heater.

In order to solve the technical problem, the utility model provides a technical scheme does: a flue gas heat exchanger comprises a shell, wherein a flue gas inlet is formed in the bottom of the shell, a flue gas outlet is formed in the top of the shell, a plurality of heat exchange plates are arranged in the shell, circulating water pipes are arranged in the heat exchange plates, a water inlet and a water outlet are respectively formed in two ends of each circulating water pipe, the heat exchange plates are of an F-shaped structure and comprise horizontal plates, vertical long plates and vertical short plates, every two heat exchange plates form a group, the heat exchange plates in the same group are mutually staggered and spliced to form a flue gas flow channel, the flue gas flow channel is of an S-shaped bent structure, the flue gas outlet is connected with a three-way valve, a first port of the three-way valve is connected with the flue gas outlet, a second port of the three-way valve is connected with an exhaust pipe, a third port of the three-way valve is connected with a gas return pipe, an auxiliary inlet is formed in the shell, the gas return pipe is connected with the auxiliary inlet, and a pump is arranged on the gas return pipe, and a temperature sensor for detecting the temperature is arranged at the three-way valve.

As an improvement, a blower is arranged at the smoke inlet.

As an improvement, the number of the heat exchange plates is at least four.

As an improvement, one end of the horizontal plate is connected with the inner side wall of the shell, the other end of the horizontal plate is vertically connected with a vertical long plate, and a vertical short plate is vertically arranged on the horizontal plate.

As an improvement, an access door is arranged on the side wall of the shell.

Compared with the prior art, the utility model the advantage lie in: the structure is simple, the use is convenient, the volume is small, and the occupied area is small; the structure of heat transfer board, area of contact is big, and the flue gas is under the interception of vertical short slab, vertical long slab, and dwell time is long for heat exchange efficiency is high, and after the heat transfer ended, the flue gas temperature was too high, gets into the casing once more and carries out the heat transfer, improves waste heat recovery rate.

Drawings

Fig. 1 is a schematic structural diagram of a flue gas heat exchanger of the present invention.

Fig. 2 is a schematic structural view of a circulating water pipe of a flue gas heat exchanger of the present invention.

As shown in the figure: 1. the gas-liquid separator comprises a shell, 2, a flue gas inlet, 3, a flue gas outlet, 4, a heat exchange plate, 4.1, a horizontal plate, 4.2, a vertical long plate, 4.3, a vertical short plate, 5, a circulating water pipe, 6, a water inlet, 7, a water outlet, 8, a flue gas flow passage, 9, a three-way valve, 10, an exhaust pipe, 11, a gas return pipe, 12, an auxiliary inlet, 13 and a pump.

Detailed Description

The flue gas heat exchanger of the present invention will be described in further detail with reference to the accompanying drawings.

With reference to the attached drawings, the flue gas heat exchanger comprises a shell 1, wherein a flue gas inlet 2 is arranged at the bottom of the shell 1, a flue gas outlet 3 is arranged at the top of the shell 1, a plurality of heat exchange plates 4 are arranged in the shell 1, circulating water pipes 5 are arranged in the heat exchange plates 4, a water inlet 6 and a water outlet 7 are respectively arranged at two ends of each circulating water pipe 5, the heat exchange plates 4 are of an F-shaped structure, each heat exchange plate 4 comprises a horizontal plate 4.1, a vertical long plate 4.2 and a vertical short plate 4.3, each two heat exchange plates 4 are in one group, flue gas flow channels 8 are formed in the middle of the mutually staggered and spliced heat exchange plates 4 of the same group, each flue gas flow channel 8 is of an S-shaped bent structure, the flue gas outlet 3 is connected with a three-way valve 9, a first port of the three-way valve 9 is connected with the flue gas outlet 3, a second port of the three-way valve 9 is connected with an exhaust pipe 10, and a third port of the three-way valve 9 is connected with an air return pipe 11, be equipped with supplementary import 12 on the casing 1, muffler 11 is connected with supplementary import 12, be equipped with pump machine 13 on the muffler 11, three-way valve 9 department is equipped with the temperature sensor who detects the temperature height.

And a blower is arranged at the flue gas inlet 2.

The number of the heat exchange plates 4 is at least four.

One end of the horizontal plate 4.1 is connected with the inner side wall of the shell 1, the other end of the horizontal plate 4.1 is vertically connected with a vertical long plate 4.2, and a vertical short plate 4.3 is vertically arranged on the horizontal plate 4.1.

And an access door is arranged on the side wall of the shell 1.

When the utility model is implemented, the structure is simple, the use is convenient, the volume is small, and the occupied area is small; the structure of heat transfer board, area of contact is big, and the flue gas is under the interception of vertical short slab, vertical long slab, and dwell time is long for heat exchange efficiency is high, and after the heat transfer ended, the flue gas temperature was too high, gets into the casing once more and carries out the heat transfer, improves waste heat recovery rate.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. A flue gas heat exchanger comprising a housing (1), characterized in that: the bottom of the shell (1) is provided with a flue gas inlet (2), the top of the shell (1) is provided with a flue gas outlet (3), the shell (1) is internally provided with a plurality of heat exchange plates (4), the heat exchange plates (4) are internally provided with circulating water pipes (5), the two ends of each circulating water pipe (5) are respectively provided with a water inlet (6) and a water outlet (7), each heat exchange plate (4) is of an F-shaped structure, each heat exchange plate (4) comprises a horizontal plate (4.1), a vertical long plate (4.2) and a vertical short plate (4.3), every two heat exchange plates (4) are in a group, the heat exchange plates (4) in the same group are mutually staggered and spliced to form a flue gas flow channel (8), the flue gas flow channel (8) is of an S-shaped bent structure, the flue gas outlet (3) is connected with a three-way valve (9), a first port of the three-way valve (9) is connected with the flue gas outlet (3), a second port of the three-way valve (9) is connected with an exhaust pipe (10), the third port of three-way valve (9) is connected with muffler (11), be equipped with supplementary import (12) on casing (1), muffler (11) are connected with supplementary import (12), be equipped with pump machine (13) on muffler (11), three-way valve (9) department is equipped with the temperature sensor who detects the temperature height.

2. A flue gas heat exchanger according to claim 1, wherein: and a blower is arranged at the flue gas inlet (2).

3. A flue gas heat exchanger according to claim 1, wherein: the number of the heat exchange plates (4) is at least four.

4. A flue gas heat exchanger according to claim 1, wherein: the one end of horizontal plate (4.1) is connected with the inside wall of casing (1), the other end of horizontal plate (4.1) is connected with vertical long board (4.2) perpendicularly, vertical short slab (4.3) set up perpendicularly on horizontal plate (4.1).

5. A flue gas heat exchanger according to claim 1, wherein: and an access door is arranged on the side wall of the shell (1).