CN210321257U

CN210321257U - Flue gas waste heat recovery device

Info

Publication number: CN210321257U
Application number: CN201921016197.2U
Authority: CN
Inventors: 李庆文; 吴埌; 韩君地; 刘忠宝
Original assignee: SHANDONG DONGHUA CEMENT Corp Ltd
Current assignee: SHANDONG DONGHUA CEMENT Corp Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-04-14
Anticipated expiration: 2029-07-02

Abstract

A flue gas waste heat recovery device belongs to the technical field of flue gas waste heat recovery equipment. The method is characterized in that: including the heat transfer jar body (1), heat transfer unit and division board (2), division board (2) level is placed in the heat transfer jar body (1) and is separated into flue gas chamber (3) and water tank (4) with the heat transfer jar body (1), erects on division board (2) to have put multiunit heat transfer unit, and the flue gas chamber (3) is stretched into to the one end of heat transfer unit, and the other end stretches into water tank (4), erect in water tank (4) and put water side baffle (6), water side baffle (6) are connected heat transfer jar body (1) inner wall and division board (2), and water side baffle (6) horizontal cross-section is the heliciform by the gradual outdiffusion in the middle part of the heat transfer jar body (1). The spiral channel formed by the water side partition plate (6) can improve the flow velocity of water so as to increase the heat exchange coefficient of the water and the heat exchange unit, fully exchange heat for low-temperature waste gas, and is high in waste heat recovery efficiency and resource-saving.

Description

Flue gas waste heat recovery device

Technical Field

A flue gas waste heat recovery device belongs to the technical field of flue gas waste heat recovery equipment.

Background

The heat loss of the cement plant mainly comprises the radiant heat loss of a kiln cylinder, the heat loss of waste gas and fly ash, the heat loss of slag and the like. In the production process of cement clinker in a cement production line, a large amount of waste gas at about 350 ℃ discharged by a kiln head clinker cooler and a kiln tail preheater in the production line generally contains more than 30% of the total heat consumption of a cement clinker firing system. After the part of waste gas is utilized by a waste heat power generation technology, the temperature of the waste gas at the outlet of the waste heat boiler is still 100-200 ℃, the part of low-temperature waste gas has low temperature but large flow, and the recoverable potential heat is huge. At present, the treatment method of the low-temperature waste gas is to directly discharge the waste gas after dust collection, so that the environment is polluted and resources are wasted.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide a flue gas waste heat recovery device, carry out waste heat recovery and dust removal, resources are saved, the environmental protection to the flue gas.

The utility model provides a technical scheme that its technical problem adopted is: this flue gas waste heat recovery device, its characterized in that: the heat exchange device comprises a heat exchange tank body, heat exchange units and a partition plate, wherein the partition plate is horizontally placed in the heat exchange tank body and divides the heat exchange tank body into a smoke gas cavity and a water tank, the water tank is positioned above the smoke gas cavity, an inner cylinder is vertically arranged in the middle of the heat exchange tank body, the smoke gas outlet is formed in the upper part of the heat exchange tank body, the inner cylinder is communicated with the smoke gas cavity and the smoke gas outlet, a smoke gas inlet communicated with the smoke gas cavity is formed in the heat exchange tank body, a water inlet is formed in the upper part of the water tank, a water outlet is formed in the side wall of the heat exchange tank body;

a water side partition plate is vertically arranged in the water tank and is connected with the inner wall of the heat exchange tank body and the partition plate, the horizontal section of the water side partition plate is spiral, and the water side partition plate gradually diffuses outwards from the middle of the heat exchange tank body.

Preferably, the heat exchange units are arranged around the axis of the heat exchange tank body at intervals, each heat exchange unit comprises a plurality of heat pipes, and the plurality of heat pipes are arranged side by side along the radius of the heat exchange tank body.

Preferably, the part of the heat pipe extending into the smoke chamber is provided with a spiral fin.

Preferably, the flue gas inlet is transversely arranged on the side wall of the heat exchange tank body, and the direction of the flue gas inlet is tangent to the side wall of the heat exchange tank body.

Preferably, a flue gas side partition plate is arranged on the inner side of the flue gas inlet and is connected with the flue gas inlet and the inner cylinder, the flue gas side partition plate is tangent to the wall of the inner cylinder, and a flue gas cavity outlet is formed in one side, far away from the flue gas inlet, of the wall of the inner cylinder.

Preferably, the bottom of the heat exchange tank body is provided with an ash storage hopper, the ash storage hopper is communicated with the smoke cavity, and the bottom of the ash storage hopper is provided with an ash discharge port.

Preferably, the water inlet is located between the water side baffle and the inner cylinder.

Preferably, one side of the bottom of the water tank is provided with a sewage draining outlet, and the water outlet is positioned above the sewage draining outlet.

Preferably, a safety valve is arranged above the water tank.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

1. the water side baffle is vertically arranged in the water tank, the water side baffle is connected with the inner wall of the heat exchange tank body and the partition plate, the horizontal section of the water side baffle is in a spiral shape which is outwards dispersed by the axis of the heat exchange tank body, when the same amount of water is added into the water inlet, the spiral channel formed by the water side baffle can improve the flow velocity of the water so as to increase the heat exchange coefficient of the water and the heat exchange unit, the heat exchange is fully performed on the low-temperature waste gas, the waste heat recovery efficiency is high.

2. The flue gas entry transversely sets up on the lateral wall of the heat transfer jar body, the direction of flue gas entry is tangent with the lateral wall of the heat transfer jar body, flue gas side baffle connects flue gas entry and interior cylinder, and flue gas side baffle is tangent with interior cylinder wall, the part that the heat pipe stretches into the flue gas chamber is provided with helical fin, the flue gas gets into the flue gas chamber and rotates around interior cylinder, the dust that the flue gas contains separates on helical fin and the heat transfer jar inner wall in flue gas chamber under the centrifugal force effect, play the dust removal effect to the flue gas, the environmental protection.

Drawings

Fig. 1 is a sectional view of a flue gas waste heat recovery device.

Fig. 2 is an enlarged schematic view at C in fig. 1.

FIG. 3 is a schematic sectional view in the direction A-A.

FIG. 4 is a schematic sectional view in the direction B-B.

Wherein: 1. the device comprises a heat exchange tank body 2, a partition plate 3, a smoke cavity 301, a smoke inlet 302, a smoke outlet 303, a smoke cavity outlet 4, a water tank 401, a water inlet 402, a water outlet 403, a sewage outlet 404, a safety valve 5, an inner cylinder 6, a water side partition plate 7, a smoke side partition plate 8, a heat pipe 9, a spiral fin 10, an ash storage hopper 11, an ash discharge port 12, a base 13 and a heat insulation layer.

Detailed Description

Fig. 1 to 4 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 4.

Referring to fig. 1-2, a partition plate 2 is horizontally arranged in a heat exchange tank body 1 and divides the heat exchange tank body 1 into a smoke gas cavity 3 and a water tank 4, the smoke gas cavity 3 is positioned below the water tank 4, an inner cylinder 5 is vertically arranged in the middle of the heat exchange tank body 1, the inner cylinder 5 is coaxial with the heat exchange tank body 1, a smoke gas outlet 302 is arranged above the heat exchange tank body 1, the inner cylinder 5 is communicated with the smoke gas outlet 302 and the smoke gas cavity 3, a smoke gas inlet 301 is arranged on the heat exchange tank body 1, the smoke gas inlet 301 is communicated with the smoke gas cavity 3, a water inlet 401 is arranged above the water tank 4 and close to the outer wall of the inner cylinder 5, a water outlet 402 is arranged on the side wall of the heat exchange tank body 1, the water outlet 402 is communicated with the water tank 4, a safety valve 404 is arranged above the water tank 4, a heat pipe 8, the bottom of the heat exchange tank body 1 is provided with an ash storage hopper 10, the bottom of the ash storage hopper 10 is provided with an ash discharge port 11, the heat exchange tank body 1 is arranged on the ground through a base 12, and the side wall of the heat exchange tank body 1 is provided with a heat preservation layer 13.

Referring to fig. 3, a water side partition plate 6 is vertically arranged in a water tank 4, the horizontal section of the water side partition plate 6 is in a spiral shape, the water side partition plate 6 is gradually diffused outwards from the middle of a heat exchange tank body 1, the inner side end part of the water side partition plate 6 is connected with an inner cylinder 5, the outer end of the water side partition plate is connected with the inner side wall of the heat exchange tank body 1, the upper end of the water side partition plate 6 is connected with the inner top wall of the water tank 4, the lower end of the water side partition plate is connected with a partition plate 2, the water side partition plate 6 is separated into spiral shapes gradually diffused outwards from the middle of the heat exchange tank body 1, a plurality of groups of heat pipes 8 are arranged around the axis of the heat exchange tank body 1, each group of heat pipes 8 comprises a plurality of heat pipes 8 arranged side by side.

Referring to fig. 4, the flue gas inlet 301 is transversely arranged on the side wall of the heat exchange tank body 1, the direction of the flue gas inlet 301 is tangent to the side wall of the heat exchange tank body 1, a flue gas side partition plate 7 is arranged on the inner side of the flue gas inlet 301, the flue gas side partition plate 7 is connected with the flue gas inlet 301 and the inner cylinder 5, the flue gas side partition plate 7 is tangent to the wall of the inner cylinder 5, a flue gas cavity outlet 303 is formed in one side, away from the flue gas inlet 301, of the wall of the inner cylinder 5, and the flue gas side partition plate 7 is connected with the inner cylinder.

A large amount of low-temperature waste gas enters the flue gas cavity 3 from the flue gas inlet 301, after the spiral flue formed by the inner cylinder 5 and the inner wall of the flue gas cavity 3 in the flue gas cavity 3 is wound, particles such as dust in the waste gas are separated onto the inner side wall of the flue gas cavity 3 and the spiral fins 9 through centrifugal action, when the separated particles such as dust are accumulated to a certain amount, the particles fall into the ash storage hopper 10 under the self gravity, and are discharged through the ash discharge port 11, the waste gas enters the inner cylinder 5 through the flue gas cavity outlet 303 around the outer circumference of the inner cylinder 5 along a spiral channel, and then is discharged through the flue gas outlet 302 above the inner cylinder 5, low-temperature water enters the water tank 4 through the water inlet 401, flows along the spiral channel formed by the water side partition plate 6 and is discharged through the water outlet 402, one end of the heat pipe 8, which is located in the flue gas cavity 3, is an evaporation section, one end of the water tank 4 is a condensation section, the waste gas transfers, the heat is transferred to the low-temperature water in the water tank 4, and the recovery of the flue gas waste heat is completed. The helical channel that water side baffle 6 formed when water inlet 401 adds same water gaging, improves the heat transfer coefficient of rivers velocity of flow in order to increase water and heat pipe 8, and abundant heat transfer, waste gas heat up suddenly leads to water tank 4 to retrieve the heat too big, and the relief valve 404 that sets up above water tank 4 when pressure risees is opened, and the explosion is avoided taking place to balanced pressure.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a flue gas waste heat recovery device which characterized in that: comprises a heat exchange tank body (1), a heat exchange unit and a partition plate (2), wherein the partition plate (2) is horizontally arranged in the heat exchange tank body (1) and divides the heat exchange tank body (1) into a smoke air cavity (3) and a water tank (4), the water tank (4) is positioned above the smoke gas cavity (3), the inner cylinder (5) is vertically arranged in the middle of the heat exchange tank body (1), the smoke gas outlet (302) is formed in the upper portion of the heat exchange tank body (1), the inner cylinder (5) is communicated with the smoke gas cavity (3) and the smoke gas outlet (302), the smoke gas inlet (301) communicated with the smoke gas cavity (3) is formed in the heat exchange tank body (1), the water inlet (401) is formed in the upper portion of the water tank (4), the water outlet (402) is formed in the side wall of the heat exchange tank body (1), a plurality of groups of heat exchange units are vertically arranged on the partition plate (2), one end of each heat exchange unit extends into the smoke;

water side partition plates (6) are vertically arranged in the water tank (4), the water side partition plates (6) are connected with the inner wall of the heat exchange tank body (1) and the partition plates (2), the horizontal sections of the water side partition plates (6) are spiral, and the water side partition plates (6) are gradually diffused outwards from the middle of the heat exchange tank body (1).

2. The flue gas waste heat recovery device according to claim 1, characterized in that: the heat exchange units are arranged at intervals around the axis of the heat exchange tank body (1), each heat exchange unit comprises a plurality of heat pipes (8), and the plurality of heat pipes (8) are arranged side by side along the radius of the heat exchange tank body (1).

3. The flue gas waste heat recovery device according to claim 2, characterized in that: the part of the heat pipe (8) extending into the smoke air cavity (3) is provided with a spiral fin (9).

4. The flue gas waste heat recovery device according to claim 1, characterized in that: the flue gas inlet (301) is transversely arranged on the side wall of the heat exchange tank body (1), and the direction of the flue gas inlet (301) is tangent to the side wall of the heat exchange tank body (1).

5. The flue gas waste heat recovery device according to claim 4, characterized in that: the inner side of the flue gas inlet (301) is provided with a flue gas side partition plate (7), the flue gas side partition plate (7) is connected with the flue gas inlet (301) and the inner cylinder (5), the flue gas side partition plate (7) is tangent to the wall of the inner cylinder (5), and a flue gas cavity outlet (303) is formed in one side, away from the flue gas inlet (301), of the wall of the inner cylinder (5).

6. The flue gas waste heat recovery device according to claim 1, characterized in that: the bottom of the heat exchange tank body (1) is provided with a dust storage hopper (10), the dust storage hopper (10) is communicated with the smoke gas cavity (3), and the bottom of the dust storage hopper (10) is provided with a dust discharge opening (11).

7. The flue gas waste heat recovery device according to claim 1, characterized in that: the water inlet (401) is positioned between the water side partition plate (6) and the inner cylinder (5).

8. The flue gas waste heat recovery device according to claim 1, characterized in that: a sewage draining outlet (403) is formed in one side of the bottom of the water tank (4), and the water outlet (402) is located above the sewage draining outlet (403).

9. The flue gas waste heat recovery device according to claim 1, characterized in that: a safety valve (404) is arranged above the water tank (4).