CN210050794U

CN210050794U - High-temperature flue gas recirculation device for preventing high-temperature corrosion of power station boiler

Info

Publication number: CN210050794U
Application number: CN201920578916.3U
Authority: CN
Inventors: 王衡
Original assignee: Shanghai Wangte Energy Resource Science & Technology Co Ltd
Current assignee: Shanghai Wangte Energy Resource Science & Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-02-11
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a power plant boiler prevents high temperature flue gas recirculation device of high temperature corruption belongs to the boiler and burns technical field, comprising a boiler, the combustor is installed to one side of boiler, the top of combustor is provided with the intake pipe that runs through to the boiler, the forced draught blower is installed to one side that the boiler was kept away from to the combustor, the output of forced draught blower is connected with the cold wind pipe, one side that the cold wind pipe was kept away from to the forced draught blower is installed phase transition heat pipe air preheater. The utility model discloses an intake pipe that sets up lets in oxygen in the boiler through external equipment, under the normal combustion conditions of assurance boiler, make near water-cooling wall maintain certain oxygen, make oxygen destroy gaseous reducing atmosphere in the boiler, can effectively slow down water-cooling wall and take place high temperature corrosion, through the shower nozzle that sets up, spray the dust in the flue gas, the dust falls down under the effect of gravity, remove dust for the first time, better cooperation dust remover carries out the flue gas separation to the flue gas and handles the flue gas.

Description

High-temperature flue gas recirculation device for preventing high-temperature corrosion of power station boiler

Technical Field

The utility model relates to a boiler burns technical field, specifically is a power plant boiler prevents high temperature flue gas recirculation device of high temperature corrosion.

Background

The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy, a large amount of smoke with hot gas can be generated after the boiler burns, if the smoke is directly discharged, the use resources are undoubtedly wasted, and therefore a device for recycling the smoke is provided.

And at the in-process of boiler burning, current flue gas recirculation device lacks the safeguard measure to the inside sulphide corruption of boiler, and the water-cooling wall contact coal matter sulfur branch of boiler makes the water-cooling wall receive the corruption, to a certain extent, has reduced the life of boiler, and current flue gas recirculation device single structure, makes recirculation device's result of use not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem that the flue gas recirculation device lacks the protective measures for the corrosion of sulfides in the boiler and has a single structure and poor using effect, the high-temperature flue gas recirculation device for preventing the high-temperature corrosion of the power station boiler is provided.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a power plant boiler prevents high temperature flue gas recirculation device of high temperature corruption, includes the boiler, the combustor is installed to one side of boiler, the top of combustor is provided with the intake pipe that runs through to the boiler, the combustor is kept away from one side of boiler and is installed the forced draught blower, the output of forced draught blower is connected with the cold air duct, the forced draught blower is kept away from one side of cold air duct and is installed phase transition heat pipe air preheater, phase transition heat pipe air preheater is through first pipe connection boiler, the powder exhauster is installed to the top of first pipeline, the output of powder exhauster is connected with the coal-charging pipe, one side that the powder exhauster was kept away from to the boiler has set gradually air heater, phase transition heat pipe economizer, dust filter box, dust remover and suction fan.

Preferably, a third pipeline is arranged inside the phase-change heat pipe air preheater, and the phase-change heat pipe air preheater is connected with the air preheater through the third pipeline.

Preferably, the dust filtering box is internally provided with a water pipe, and the bottom of the water pipe is uniformly provided with a plurality of groups of spray heads.

Preferably, the coal inlet pipe is connected with the first pipeline through a second pipeline.

Preferably, a chimney is arranged on one side of the suction fan, which is far away from the boiler.

Preferably, the third conduit has a serpentine configuration.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an intake pipe that sets up lets in oxygen in the boiler through external equipment, under the normal combustion conditions of assurance boiler, make near water-cooling wall maintain certain oxygen, make oxygen destroy gaseous reducing atmosphere in the boiler, can effectively slow down water-cooling wall and take place high temperature corrosion, and through the shower nozzle that sets up, spray the dust in the flue gas, make the dust fall under the effect of gravity, remove dust for the first time, thereby better cooperation dust remover carries out the flue gas separation and handles the flue gas to the flue gas.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the phase change heat pipe air preheater of the present invention;

fig. 3 is a schematic structural view of the dust filtering box of the present invention.

In the figure: 1. a boiler; 2. a burner; 3. an air inlet pipe; 4. a blower; 5. a cold air pipe; 6. a phase change heat pipe air preheater; 7. a first conduit; 8. a second conduit; 9. a powder discharging machine; 10. a coal inlet pipe; 11. an air preheater; 12. a phase change heat pipe economizer; 13. a dust filtering box; 14. a water pipe; 15. a spray head; 16. a dust remover; 17. a suction fan; 18. a chimney; 19. a third conduit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses in combustor 2 (the model is MAIOR 60), forced draught blower 4 (the model is Y5-47), phase transition heat pipe air preheater 6 (the model is ZGRH-K), powder exhauster 9 (the model is G (Y) 4-73), air heater 11 (the model is WST-12), phase transition heat pipe economizer 12 (the model is QY-17), dust remover 16 (the model is GMC 60-2) and suction fan 17 (the model is Y5-47) all can order in market or private and obtain.

Referring to fig. 1-3, a high temperature flue gas recirculation device for preventing high temperature corrosion of a power station boiler comprises a boiler 1, a combustor 2 is installed on one side of the boiler 1, an air inlet pipe 3 penetrating through the boiler 1 is arranged above the combustor 2, a blower 4 is installed on one side, away from the boiler 1, of the combustor 2, an output end of the blower 4 is connected with a cold air pipe 5, a phase change heat pipe air preheater 6 is installed on one side, away from the cold air pipe 5, of the blower 4, the phase change heat pipe air preheater 6 is connected with the boiler 1 through a first pipeline 7, a powder exhauster 9 is installed above the first pipeline 7, an output end of the powder exhauster 9 is connected with a coal inlet pipe 10, and an air preheater 11, a phase change heat pipe economizer 12, a dust filtering box 13, a dust remover 16 and a suction fan 17 are sequentially arranged on one side.

The utility model discloses an intake pipe 3 that sets up lets in oxygen to 1 inside of boiler through intake pipe 3, destroys 1 inside reducing atmosphere of boiler, slows down water-cooling wall high temperature corrosion, makes flue gas recirculation device's result of use better.

Please refer to fig. 1, a third pipe 19 is disposed inside the phase change heat pipe air preheater 6, and the phase change heat pipe air preheater 6 is connected to the air preheater 11 through the third pipe 19.

This kind of power plant boiler prevents high temperature corrosion's high temperature flue gas recirculation device makes the heat can conduct through third pipeline 19 and cold air through the third pipeline 19 that sets up, makes flue gas cyclic utilization.

Please refer to fig. 3, a water pipe 14 is disposed inside the dust filtering box 13, and a plurality of groups of nozzles 15 are uniformly disposed at the bottom of the water pipe 14.

This kind of power plant boiler prevents high temperature corrosion's high temperature flue gas recirculation device carries out primary treatment to the dust through water pipe 14 and the shower nozzle 15 that sets up, reduces the entering volume of dust.

Referring to fig. 1, the coal inlet pipe 10 is connected to the first pipe 7 through the second pipe 8.

This kind of power plant boiler prevents high temperature corrosion's high temperature flue gas recirculation device makes steam get into boiler 1 respectively and advance in coal pipe 10 through the second pipeline 8 that sets up, supplementary buggy gets into in boiler 1.

Referring again to fig. 1, a chimney 18 is provided on the side of the suction fan 17 remote from the boiler 1.

The high-temperature flue gas recirculation device for preventing high-temperature corrosion of the utility boiler enables flue gas to be discharged from the chimney 18 through the chimney 18.

Referring again to fig. 2, the third conduit 19 has a serpentine configuration.

This kind of power plant boiler prevents high temperature corrosion's high temperature flue gas recirculation device has increased the area of contact of third pipeline 19 through the third pipeline 19 that is snakelike structure, makes the effect of heat conduction better.

The working principle is as follows: when the boiler is used, a power supply is switched on, a switch of the combustor 2 is switched on, the combustor 2 is enabled to burn towards the interior of the boiler 1, cold air is sent into the phase-change heat pipe air preheater 6 through the air feeder 4, the cold air absorbs heat of exhausted smoke to become hot air and enters the boiler 1, meanwhile, the hot air enters the second pipeline 8, the pulverized coal is sucked into the powder exhauster 9, the hot air plays a role in drying the pulverized coal, meanwhile, the powder exhauster 9 drives the hot air and the pulverized coal to enter the boiler 1 together, oxygen is introduced into the boiler 1 through the air inlet pipe 3 to destroy the reducing atmosphere in the boiler 1, the high-temperature corrosion of a water-cooling wall is relieved, the burnt smoke keeps a medium-high temperature state, heat is released to the superheater, the reheater and the air preheater 11 through heat exchange modes such as convection and radiation, and then the radiator in the air preheater 11 absorbs heat, in the third pipeline 19 is conducted, hot gas enters the phase change heat pipe air preheater 6 from the third pipeline 19 again, cold air passing through is conducted, resources are saved, then the temperature of flue gas discharged from the air preheater 11 is not high, the flue gas cannot be reused, water flow is injected into the water pipe 14, water flow sprayed by the spray heads 15 sprays the passing flue gas, dust in the flue gas falls by water flow spraying under the action of gravity and is separated from the flue gas, then the flue gas dust is completely separated by the dust remover 16, and the flue gas dust is introduced into the chimney 18 by the suction fan 17 and is discharged into the atmosphere.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a power plant boiler prevents high temperature flue gas recirculation device of high temperature corrosion, includes boiler (1), its characterized in that: a burner (2) is arranged at one side of the boiler (1), an air inlet pipe (3) penetrating to the boiler (1) is arranged above the burner (2), a blower (4) is arranged on one side of the burner (2) far away from the boiler (1), the output end of the air feeder (4) is connected with a cold air pipe (5), one side of the air feeder (4) far away from the cold air pipe (5) is provided with a phase change heat pipe air preheater (6), the phase-change heat pipe air preheater (6) is connected with the boiler (1) through a first pipeline (7), a powder discharging machine (9) is arranged above the first pipeline (7), the output end of the powder discharging machine (9) is connected with a coal inlet pipe (10), one side of the boiler (1) far away from the powder exhauster (9) is sequentially provided with an air preheater (11), a phase-change heat pipe coal economizer (12), a dust filtering box (13), a dust remover (16) and a suction fan (17).

2. The high-temperature flue gas recirculation device for preventing high-temperature corrosion of a utility boiler in claim 1, is characterized in that: the phase-change heat pipe air preheater is characterized in that a third pipeline (19) is arranged inside the phase-change heat pipe air preheater (6), and the phase-change heat pipe air preheater (6) is connected with the air preheater (11) through the third pipeline (19).

3. The high-temperature flue gas recirculation device for preventing high-temperature corrosion of a utility boiler in claim 1, is characterized in that: a water pipe (14) is arranged inside the dust filtering box (13), and a plurality of groups of spray heads (15) are uniformly arranged at the bottom of the water pipe (14).

4. The high-temperature flue gas recirculation device for preventing high-temperature corrosion of a utility boiler in claim 1, is characterized in that: the coal inlet pipe (10) is connected with the first pipeline (7) through a second pipeline (8).

5. The high-temperature flue gas recirculation device for preventing high-temperature corrosion of a utility boiler in claim 1, is characterized in that: and a chimney (18) is arranged on one side of the suction fan (17) far away from the boiler (1).

6. The high-temperature flue gas recirculation device for preventing high-temperature corrosion of a utility boiler in claim 2, is characterized in that: the third conduit (19) is of serpentine configuration.