CN215831960U - Smoke reheating condensation-preventing discharge device - Google Patents

Smoke reheating condensation-preventing discharge device Download PDF

Info

Publication number
CN215831960U
CN215831960U CN202121737675.6U CN202121737675U CN215831960U CN 215831960 U CN215831960 U CN 215831960U CN 202121737675 U CN202121737675 U CN 202121737675U CN 215831960 U CN215831960 U CN 215831960U
Authority
CN
China
Prior art keywords
flue gas
inlet end
flue
reheating
boiler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202121737675.6U
Other languages
Chinese (zh)
Inventor
段明楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Xuetao Heavy Industry Technology Co ltd
Original Assignee
Jiangsu Xuetao Heavy Industry Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Xuetao Heavy Industry Technology Co ltd filed Critical Jiangsu Xuetao Heavy Industry Technology Co ltd
Priority to CN202121737675.6U priority Critical patent/CN215831960U/en
Application granted granted Critical
Publication of CN215831960U publication Critical patent/CN215831960U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to the technical field of boiler flue gas recirculation, in particular to a flue gas reheating condensation-preventing discharge device. The boiler comprises a boiler, wherein a flue gas outlet end of the boiler is connected with a first flue gas inlet end, the first flue gas outlet end is connected with a boiler flue gas inlet end of a flue gas reheating device, and a primary cooling flue gas outlet end of the flue gas reheating device is connected with a second flue gas inlet end; the exhaust end of the second flue is connected with the inlet end of the waste heat water tank, and the exhaust end of the waste heat water tank is connected with the inlet end of the third flue; and the air outlet end of the third flue is connected with the air inlet end of the lower chimney section. The low-temperature flue gas in the chimney is heated by the high-temperature flue gas reaching about 200 ℃ in the boiler, so that the temperature of the low-temperature flue gas is returned to be above 100 ℃ again, condensed water cannot appear in the chimney, and the flue gas is guaranteed to be smoothly discharged into the high-rise atmosphere.

Description

Smoke reheating condensation-preventing discharge device
Technical Field
The utility model relates to the technical field of boiler flue gas recirculation, in particular to a flue gas reheating condensation-preventing discharge device.
Background
The burner Flue Gas Recirculation (FGR) technology is a technology for reducing nitrogen oxides by reintroducing part of the boiler flue gas into the furnace and mixing it with natural gas and air for combustion. With the stricter and stricter requirements of environmental protection on the content of nitrogen oxides in the smoke discharged by the boiler, a plurality of newly-installed boilers require low-nitrogen combustion burners, and more installed boilers require low-nitrogen modification.
The low-nitrogen combustion of the burner needs to reintroduce part of boiler flue gas into the hearth, the temperature of the reintroduced flue gas cannot be too high and is generally not higher than 120 ℃, the temperature of the flue gas directly discharged by the boiler is about 200 ℃, a waste heat water tank is needed to cool the flue gas by circulating water in order to meet the requirement of low-nitrogen combustion, the cooled flue gas part is newly introduced into the hearth, and most of the rest is discharged into the atmosphere from a chimney. However, most of low-nitrogen combustion adopts natural gas as fuel, the water vapor content in the flue gas is very high, condensed water can be separated out from the flue gas when the temperature of the flue gas is lower than 100 ℃, the temperature can be further reduced after the low-temperature flue gas enters a chimney, the separated condensed water can be attached to the inner wall of the chimney and can be continuously collected, the phenomenon is aggravated particularly when the weather temperature is lower in winter, and a large amount of condensed water can drip from the upper part of the chimney seriously to influence the smoke discharge of a boiler. Meanwhile, the inner wall of the chimney is rusted due to long-time water, and the structural strength is influenced to generate potential safety hazards due to long-time corrosion.
SUMMERY OF THE UTILITY MODEL
This application is directed against the shortcoming among the above-mentioned prior art, provides a flue gas reheating anti-condensation discharging equipment rational in infrastructure, and flue gas reheating device during operation, boiler exhaust high temperature flue gas give the low temperature flue gas of discharging into the chimney from the waste heat water tank with heat transfer when reheating flue gas pipe, make the flue gas temperature in the chimney suitably improve, avoid in the flue gas steam in the chimney condensation drippage, influence the boiler and discharge fume.
The technical scheme adopted by the utility model is as follows:
a flue gas reheating condensation-preventing discharge device comprises a boiler, wherein a flue gas outlet end of the boiler is connected with a first flue gas inlet end, a first flue gas outlet end is connected with a boiler flue gas inlet end of a flue gas reheating device, and a primary cooling flue gas outlet end of the flue gas reheating device is connected with a second flue gas inlet end; the exhaust end of the second flue is connected with the inlet end of the waste heat water tank, and the exhaust end of the waste heat water tank is connected with the inlet end of the third flue; the third flue is given vent to anger and is held and connect chimney section inlet end down, chimney section is given vent to anger and is held and connect the secondary cooling flue gas inlet end of flue gas reheating device down, flue gas reheating device's the end of giving vent to anger connects chimney section inlet end up.
Furthermore, a recycling flue gas outlet end is arranged on the third flue, the recycling flue gas outlet end of the third flue is connected with a flue gas inlet end of the recycling flue, the flue gas outlet end of the recycling flue is connected with a burner gas inlet end, and the burner gas outlet end is connected with a boiler gas inlet end.
Furthermore, an access hole is formed in the first flue, and a maintenance cover plate is detachably connected to the access hole through a connecting piece.
Furthermore, the air outlet end of the upper chimney section is connected with a rain-proof cap of a cone structure.
Further, flue gas reheating device includes the body of reheating, and flue gas reheating device's the end of giving vent to anger and secondary cooling flue gas inlet end set up respectively in reheating body upper and lower extreme, and this internal flue gas chamber that sets up reheat, flue gas chamber and flue gas reheating device's the end of giving vent to anger and secondary cooling flue gas inlet end intercommunication, flue gas reheating device's boiler flue gas inlet end and primary cooling flue gas outlet end set up respectively at reheating body left and right ends end, and flue gas reheating device's boiler flue gas inlet end and primary cooling flue gas are given vent to anger and are set up the fixed plate in the end respectively, and flue gas reheating device's boiler flue gas inlet end and primary cooling flue gas are given vent to anger and are set up a plurality of reheat flue gas pipes along the flue gas flow direction between the end, and a plurality of reheat flue gas pipe both ends are fixed respectively on flue gas reheating device's boiler flue gas inlet end and primary cooling flue gas outlet end's fixed plate.
The utility model has the following beneficial effects:
the boiler has compact and reasonable structure and convenient operation, heats the low-temperature flue gas in the chimney by the high-temperature flue gas reaching about 200 ℃ in the boiler, and enables the temperature of the low-temperature flue gas to return to more than 100 ℃ again, so that no condensed water is generated in the chimney, and the flue gas is ensured to be smoothly discharged into the high-rise atmosphere; meanwhile, because the high-temperature flue gas is preliminarily cooled before entering the waste heat water tank, the heat exchange area, the water consumption and the working power of the waste heat water tank can be properly reduced, the energy consumption is reduced, and two purposes are achieved at one stroke.
Drawings
FIG. 1 is a front view of the present invention.
Fig. 2 is a perspective view of the flue gas reheating device.
FIG. 3 is a front half sectional view of a flue gas reheating device.
Wherein: 1. a boiler; 2. a burner; 3. a waste heat water tank; 4. a flue gas reheating device; 4.1, reheating the body; 4.2, fixing plates; 4.3, a reheating flue gas pipe; 4.4, a flue gas cavity; 5. a flue gas recirculation flue; 6. a third flue; 7. a lower chimney section; 8. an upper chimney section; 9. a first flue; 10. a second flue; 11. maintaining the cover plate; 12. rain-proof hat.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
In the embodiment shown in fig. 1, the system mainly comprises a boiler 1, wherein a flue gas outlet end of the boiler 1 is connected with a gas inlet end of a first flue 9, a gas outlet end of the first flue 9 is connected with a boiler flue gas inlet end of a flue gas reheating device 4, and a primary cooling flue gas outlet end of the flue gas reheating device 4 is connected with a gas inlet end of a second flue 10. The air outlet end of the second flue 10 is connected with the air inlet end of the waste heat water tank 3, and the air outlet end of the waste heat water tank 3 is connected with the air inlet end of the third flue 6. The air outlet end of the third flue 6 is connected with the air inlet end of the lower chimney section 7, the air outlet end of the lower chimney section 7 is connected with the secondary cooling flue gas inlet end of the flue gas reheating device 4, and the air outlet end of the flue gas reheating device 4 is connected with the air inlet end of the upper chimney section 8.
In the embodiment shown in fig. 1, the third flue 6 is provided with a recirculated flue gas outlet end, the recirculated flue gas outlet end of the third flue 6 is connected with the flue gas recirculation flue 5 inlet end, the flue gas recirculation flue 5 outlet end is connected with the burner 2 inlet end, and the burner 2 outlet end is connected with the boiler 1 inlet end.
In the embodiment shown in fig. 1, an access hole is formed in the first flue 9, a maintenance cover plate 11 is detachably connected to the access hole through a connecting piece, and when the first flue 9 needs to be maintained, the maintenance cover plate 11 is detached and the inside of the first flue 9 is maintained.
In the embodiment shown in fig. 1, the air outlet end of the upper chimney section 8 is connected to the rain-proof cap 12 of the cone structure, and the rain-proof cap 12 can prevent rainwater from directly entering the upper chimney section 8.
In the embodiment shown in fig. 2 and 3, the flue gas reheating device 4 comprises a reheating body 4.1, the gas outlet end and the secondary cooling flue gas inlet end of the flue gas reheating device 4 are respectively arranged at the upper end and the lower end of the reheating body 4.1, a flue gas cavity 4.4 is arranged in the reheating body 4.1, and the gas outlet end and the secondary cooling flue gas inlet end of the flue gas cavity 4.4 and the flue gas reheating device 4 are communicated.
In the embodiment shown in fig. 2 and 3, the boiler flue gas inlet end and the once cooling flue gas outlet end of the flue gas reheating device 4 are respectively arranged at the left end and the right end of the reheating body 4.1, the boiler flue gas inlet end and the once cooling flue gas outlet end of the flue gas reheating device 4 are respectively provided with the fixing plate 4.2, a plurality of reheating flue gas pipes 4.3 are arranged between the boiler flue gas inlet end and the once cooling flue gas outlet end of the flue gas reheating device 4 along the flue gas flowing direction, and the two ends of the reheating flue gas pipes 4.3 are respectively fixed on the fixing plate 4.2 in the boiler flue gas inlet end and the once cooling flue gas outlet end of the flue gas reheating device 4. The reheating flue gas pipes 4.3 are made of seamless steel pipes.
When the flue gas reheating device is used, high-temperature flue gas in a boiler enters the multiple reheating flue gas pipes 4.3 through the boiler flue gas inlet end of the flue gas reheating device 4, then passes through flue gas heat exchange in the multiple reheating flue gas pipes 4.3 and the flue gas cavity 4.4, and low-temperature flue gas after heat exchange enters the primary cooling flue gas outlet end of the flue gas reheating device 4 through the reheating flue gas pipes 4.3. Flue gas in the waste heat water tank 3 is discharged into the lower chimney section 7, then enters the flue gas cavity 4.4 to exchange heat with high-temperature flue gas in the reheating flue gas pipe 4.3, and the flue gas heated in the flue gas cavity 4.4 after heat exchange is discharged into the upper chimney section 8, so that condensation and dripping of a large amount of water vapor in the flue gas at the upper chimney section are avoided, and boiler smoke discharge is influenced.
The working principle of the utility model is as follows: the flue gas reheating device is arranged in the middle of a chimney, the upper part and the lower part of the flue gas reheating device are communicated with the chimney, the left part and the right part of the flue gas reheating device are communicated with a boiler flue, and the middle of the flue gas reheating device is separated by a seamless steel pipe bundle serving as a heat exchange smoke pipe. When the high-temperature flue gas discharged by the boiler passes through the smoke tube, heat is transferred to the low-temperature flue gas discharged into the chimney from the waste heat water tank, so that the temperature of the low-temperature flue gas is properly increased.
According to the utility model, the low-temperature flue gas in the chimney is heated by the high-temperature flue gas reaching about 200 ℃ in the boiler, so that the temperature of the low-temperature flue gas is returned to more than 100 ℃ again, thus no condensed water is generated in the chimney, and the flue gas is ensured to be smoothly discharged into the high-rise atmosphere; meanwhile, because the high-temperature flue gas is preliminarily cooled before entering the waste heat water tank, the heat exchange area, the water consumption and the working power of the waste heat water tank can be properly reduced, the energy consumption is reduced, and two purposes are achieved at one stroke.
The above description is intended to illustrate the present invention and not to limit the present invention, which is defined by the scope of the claims, and may be modified in any manner within the scope of the present invention.

Claims (5)

1. The utility model provides a flue gas is condensation emission device again, includes boiler (1), its characterized in that: the flue gas outlet end of the boiler (1) is connected with the inlet end of a first flue (9), the outlet end of the first flue (9) is connected with the inlet end of the boiler flue gas of a flue gas reheating device (4), and the primary cooling flue gas outlet end of the flue gas reheating device (4) is connected with the inlet end of a second flue (10); the air outlet end of the second flue (10) is connected with the air inlet end of the waste heat water tank (3), and the air outlet end of the waste heat water tank (3) is connected with the air inlet end of the third flue (6); third flue (6) give vent to anger the end and connect chimney section (7) inlet end down, chimney section (7) give vent to anger the end and connect the secondary cooling flue gas inlet end of flue gas reheating device (4) down, flue gas reheating device (4) give vent to anger the end and connect chimney section (8) inlet end.
2. The flue gas reheating condensation preventing discharge device as claimed in claim 1, wherein: the third flue (6) is provided with a recirculated flue gas outlet end, the recirculated flue gas outlet end of the third flue (6) is connected with a flue gas recirculation flue (5) inlet end, the flue gas recirculation flue (5) outlet end is connected with a combustor (2) inlet end, and the combustor (2) outlet end is connected with a boiler (1) inlet end.
3. The flue gas reheating condensation preventing discharge device as claimed in claim 1 or 2, wherein: an access hole is formed in the first flue (9), and a maintenance cover plate (11) is detachably connected to the access hole through a connecting piece.
4. The flue gas reheating condensation preventing discharge device as claimed in claim 1 or 2, wherein: and the air outlet end of the upper chimney section (8) is connected with a rain-proof cap (12) of a cone structure.
5. The flue gas reheating condensation preventing discharge device as claimed in claim 1 or 2, wherein: flue gas reheating device (4) are including reheating body (4.1), and the end of giving vent to anger of flue gas reheating device (4) and secondary cooling flue gas inlet end set up respectively in reheating body (4.1) lower extreme, set up flue gas chamber (4.4) in reheating body (4.1), and flue gas chamber (4.4) and flue gas reheating device (4) give vent to anger end and secondary cooling flue gas inlet end intercommunication, the boiler flue gas inlet end and the primary cooling flue gas outlet end of flue gas reheating device (4) set up respectively at reheating body (4.1) left and right-hand member, and the boiler flue gas inlet end and the primary cooling flue gas outlet end of flue gas reheating device (4) set up fixed plate (4.2) respectively in the end of giving vent to anger, and set up a plurality of reheat pipes (4.3) along the flue gas flow direction between the boiler flue gas inlet end of flue gas reheating device (4) and the primary cooling flue gas outlet end, and fix respectively at the boiler flue gas inlet end of flue gas reheating device (4) and the interior flue gas cooling flue gas inlet end of primary cooling flue gas inlet end of flue gas reheating device (4), a plurality of reheat pipe (4.3) both ends A fixing plate (4.2).
CN202121737675.6U 2021-07-28 2021-07-28 Smoke reheating condensation-preventing discharge device Active CN215831960U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121737675.6U CN215831960U (en) 2021-07-28 2021-07-28 Smoke reheating condensation-preventing discharge device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121737675.6U CN215831960U (en) 2021-07-28 2021-07-28 Smoke reheating condensation-preventing discharge device

Publications (1)

Publication Number Publication Date
CN215831960U true CN215831960U (en) 2022-02-15

Family

ID=80193152

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121737675.6U Active CN215831960U (en) 2021-07-28 2021-07-28 Smoke reheating condensation-preventing discharge device

Country Status (1)

Country Link
CN (1) CN215831960U (en)

Similar Documents

Publication Publication Date Title
CN107525090B (en) Come into operation the coal-fired power station boiler device and its application method of denitrating system when a kind of igniting
CN103088178A (en) Blast furnace hot-blast stove flue gas self-circulation combustion method and system
CN205560811U (en) Boiler flue gas residual heat recycling system
CN215831960U (en) Smoke reheating condensation-preventing discharge device
CN102635945A (en) Through-flow type narrow-clearance integral condensation hot-water boiler
CN202521859U (en) Tubular condensation boiler
CN204648206U (en) Horizontal double-deck water pipe furnace grate many backhauls water bath dust-removing flashback coal burning boiler
CN101928797A (en) High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace
CN104235825A (en) Boiler flue gas waste heat recycling system
CN106196073A (en) High-efficiency helical fin self preheating burner
CN101928796A (en) High wind temperature energy saving and emission reduction combined preheating method for blast furnace
CN209295433U (en) A kind of fuel wind furnace
CN103245058B (en) Micro-positive pressure combustion combined cooling energy-saving boiler
CN206786682U (en) Low nitrogen vapor boiler
CN201858629U (en) Vertical biomass combustion steam boiler
CN201785422U (en) High-air-temperature energy-saving emission-reduction combined preheating system of blast furnace
CN205560810U (en) Novel flue gas waste heat recovering system
CN216844640U (en) System for reducing exhaust gas temperature of blast furnace gas boiler
CN217302787U (en) Double-stroke heat exchange flue gas backflow high-energy-efficiency W-shaped radiant tube burner
CN211475997U (en) Coke oven gas boiler afterbody flue gas system
CN104235827A (en) Boiler smoke waste heat utilization system
CN211011375U (en) Detachable secondary preheating type air preheating burner
CN214536121U (en) Low-nitrogen type overheating steam injection boiler
CN215259719U (en) High-efficient novel steam boiler that fires formaldehyde tail gas
CN211233375U (en) High-efficient condensation gas hot water stove structure and system of mixing heat exchange

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant