CN220017413U - Flue gas guide screen for two-three flues of DHL type boiler - Google Patents
Flue gas guide screen for two-three flues of DHL type boiler Download PDFInfo
- Publication number
- CN220017413U CN220017413U CN202320301017.5U CN202320301017U CN220017413U CN 220017413 U CN220017413 U CN 220017413U CN 202320301017 U CN202320301017 U CN 202320301017U CN 220017413 U CN220017413 U CN 220017413U
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- CN
- China
- Prior art keywords
- flue
- water
- dhl
- boiler
- screen
- 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.)
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Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000003546 flue gas Substances 0.000 title claims abstract description 36
- 206010022000 influenza Diseases 0.000 title claims description 30
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000000779 smoke Substances 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model relates to the technical field of flue gas guide screens, in particular to a flue gas guide screen for a second flue and a third flue of a DHL boiler. According to the utility model, by arranging the structures such as the diversion water-cooling screen and the like, the diversion water-cooling screen can conduct diversion on high-temperature flue gas flowing from the second flue of the DHL boiler to the third flue of the DHL boiler, so that the high-temperature flue gas uniformly flows to the third flue of the DHL boiler, the generation of flue gas vortex and flue gas bias flow is avoided, and the effect of reducing the abrasion of the flue gas on the convection heating surface of the inlet of the third flue and the water-cooling wall of the rear wall of the third flue is achieved.
Description
Technical Field
The utility model relates to the technical field of flue gas guide screens, in particular to a flue gas guide screen for a two-three flue of a DHL type boiler.
Background
The DHL (single drum transverse chain boiler) boiler is provided with a multi-channel water cooling wall for ensuring the output of the boiler, and a convection heating surface such as a superheater is arranged in a third channel. The high-temperature smoke generated after the fuel is combusted flows from the second flue to the third flue, and at the turning position of the second flue and the third flue, the smoke flow velocity is high, and smoke vortex is easy to generate. When the boiler burns high ash content fuel, the larger fly ash content in the flue gas can cause serious abrasion to the convection heating surface arranged at the inlet of the three flues and the water cooling wall of the rear wall of the three flues; when the moisture content of the fuel is large, the combustion share in the hearth is relatively reduced, and part of the combustion process is carried out in the second flue, so that the temperature of the flue gas entering the convection heating surface of the inlet of the third flue is higher, and high-temperature corrosion is easy to generate.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a smoke guide screen for a two-three flue of a DHL type boiler.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a flue gas water conservancy diversion screen for two three flues of DHL type boiler, includes the water conservancy diversion water-cooled screen, the lower surface fixed mounting of water conservancy diversion water-cooled screen has water conservancy diversion water-cooled screen lower header, the last fixed surface of water conservancy diversion water-cooled screen has water conservancy diversion water-cooled screen upper header, the surface fixed mounting of water conservancy diversion water-cooled screen has two flues of DHL boiler, the one end fixed mounting that keeps away from two flues of DHL boiler of water conservancy diversion water-cooled screen has three flues of DHL boiler, connect through the water conservancy diversion water-cooled screen between water conservancy diversion water-cooled screen lower header and the water conservancy diversion water-cooled screen upper header, connect through the water conservancy diversion water-cooled screen between two flues of DHL boiler and the three flues of DHL boiler.
In order to protect the three-flue inlet convection heating surface and the three-flue back wall water-cooling wall, the utility model is improved in that the three-flue inlet convection heating surface is fixedly arranged on the surface of the three-flue of the DHL boiler, and the three-flue back wall water-cooling wall is fixedly arranged at one end of the three-flue of the DHL boiler, which is far away from the three-flue inlet convection heating surface.
In order to connect the three-flue inlet convection heating surface and the three-flue back wall water-cooling wall, the utility model is improved in that the three-flue inlet convection heating surface is connected with the three-flue back wall water-cooling wall through a DHL boiler.
In order to achieve the effect of preventing the convection heating surface of the inlet of the three flues from high-temperature corrosion, the utility model is improved in that high-temperature flue gas circulates between the two flues of the DHL boiler and the three flues of the DHL boiler, and saturated water circulates among the diversion water-cooling screen, the diversion water-cooling screen lower header and the diversion water-cooling screen upper header.
Compared with the prior art, the utility model has the advantages and positive effects that:
1. according to the utility model, by arranging the structures such as the diversion water-cooling screen and the like, the diversion water-cooling screen can conduct diversion on high-temperature flue gas flowing from the second flue of the DHL boiler to the third flue of the DHL boiler, so that the high-temperature flue gas uniformly flows to the third flue of the DHL boiler, the generation of flue gas vortex and flue gas bias flow is avoided, and the effect of reducing abrasion of the flue gas on the convection heating surface of the inlet of the third flue and the water-cooling wall of the rear wall of the third flue is achieved.
2. According to the utility model, through the structures such as the diversion water-cooling screen and the like, the diversion water-cooling screen can exchange heat high-temperature flue gas flowing from the second flue of the DHL boiler to the third flue of the DHL boiler, and the flue gas inlet temperature of the convection heating surface of the third flue inlet is reduced, so that the metal wall temperature is reduced, and the effect of preventing the high-temperature corrosion of the convection heating surface of the third flue inlet is achieved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a smoke guide screen for a two-three flue of a DHL boiler.
Legend description:
1. a diversion water cooling screen; 2. a diversion water-cooled screen lower header; 3. a water diversion water-cooling screen upper header; 4. DHL boiler two-flue; 5. three flues of the DHL boiler; 6. a convection heating surface of the inlet of the three flues; 7. three flue back wall water-cooling walls.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Example 1
Referring to fig. 1, the present utility model provides a technical solution: the utility model provides a flue gas water conservancy diversion screen for two three flues of DHL type boiler, including water conservancy diversion water-cooled screen 1, the lower surface fixed mounting of water conservancy diversion water-cooled screen 1 has water conservancy diversion water-cooled screen lower header 2, the last surface fixed mounting of water conservancy diversion water-cooled screen 1 has water conservancy diversion water-cooled screen upper header 3, the surface fixed mounting of water conservancy diversion water-cooled screen 1 has two flues of DHL boiler 4, the one end fixed mounting that water conservancy diversion water-cooled screen 1 kept away from two flues of DHL boiler 4 has three flues of DHL boiler 5, connect through water conservancy diversion water-cooled screen 1 between water conservancy diversion water-cooled screen lower header 2 and the last header 3 of water conservancy diversion water-cooled screen, connect through water conservancy diversion water-cooled screen 1 between two flues of water conservancy diversion boiler 4 and the three flues of DHL boiler 5.
Referring to fig. 1, a three-flue inlet convection heating surface 6 is fixedly installed on the surface of a three-flue 5 of the DHL boiler, a three-flue back wall water-cooled wall 7 is fixedly installed at one end, far away from the three-flue inlet convection heating surface 6, of the three-flue inlet convection heating surface 5 of the DHL boiler, and the three-flue inlet convection heating surface 6 and the three-flue back wall water-cooled wall 7 are connected through the three-flue 5 of the DHL boiler.
Example two
Referring to fig. 1, high temperature flue gas circulates between a second flue 4 of the DHL boiler and a third flue 5 of the DHL boiler, saturated water circulates among a diversion water-cooled screen 1, a diversion water-cooled screen lower header 2 and a diversion water-cooled screen upper header 3, and the diversion water-cooled screen 1 can exchange heat the high temperature flue gas flowing from the second flue to the third flue, so as to reduce the temperature of the flue gas inlet of the third flue inlet convection heating surface 6, thereby reducing the temperature of the metal wall surface and achieving the effect of preventing the high temperature corrosion of the third flue inlet convection heating surface 6.
Working principle: the device is provided with the diversion water-cooling screen 1, saturated water passes through the diversion water-cooling screen lower header 2, the saturated water is led out by the diversion water-cooling screen upper header 3 after heat exchange between the diversion water-cooling screen 1 and high-temperature flue gas, the high-temperature flue gas flows to the DHL boiler three-flue 5 from the DHL boiler two flues 4, and flows evenly through the DHL boiler three-flue 5 by the diversion water-cooling screen 1, and the diversion water-cooling screen 1 can conduct diversion on the high-temperature flue gas flowing to the DHL boiler three-flue 5 from the DHL boiler two flues 4, so that the high-temperature flue gas evenly flows to the DHL boiler three-flue 5, the vortex and the bias flow of the flue gas are avoided, the effect of reducing abrasion of the flue gas to the three-flue inlet convection heating surface 6 and the three-flue back wall water-cooling wall 7 is achieved, and the diversion water-cooling screen 1 can conduct heat exchange on the high-temperature flue gas flowing to the DHL boiler three-flue 5 from the DHL boiler two flues 4, so as to reduce the inlet convection heating surface 6 flue gas inlet temperature, thereby reducing the metal wall surface temperature, and achieving the effect of preventing the high-temperature corrosion of the three-inlet convection heating surface 6.
The present utility model is not limited to the above embodiments, and any equivalent embodiments which can be changed or modified by the technical disclosure described above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above embodiments according to the technical matter of the present utility model will still fall within the scope of the technical disclosure.
Claims (4)
1. The utility model provides a flue gas water conservancy diversion screen that is used for two three flues of DHL formula boiler, includes water conservancy diversion water-cooling screen (1), its characterized in that: the utility model discloses a water-cooled boiler is characterized in that a water-cooled screen lower header (2) is fixedly arranged on the lower surface of a water-cooled screen (1), a water-cooled screen upper header (3) is fixedly arranged on the upper surface of the water-cooled screen (1), a two-flue (4) of the DHL boiler is fixedly arranged on the surface of the water-cooled screen (1), a three-flue (5) of the DHL boiler is fixedly arranged at one end, far away from the two-flue (4), of the water-cooled screen (1), the water-cooled screen lower header (2) is connected with the water-cooled screen upper header (3) through the water-cooled screen (1), and the two-flue (4) of the DHL boiler is connected with the three-flue (5) of the DHL boiler through the water-cooled screen (1).
2. The smoke guide screen for a two-to-three flue of a DHL boiler of claim 1, wherein: the surface of the DHL boiler three-flue (5) is fixedly provided with a three-flue inlet convection heating surface (6), and one end, far away from the three-flue inlet convection heating surface (6), of the DHL boiler three-flue (5) is fixedly provided with a three-flue back wall water-cooled wall (7).
3. The smoke guide screen for a di-tri-flue of a DHL boiler according to claim 2, wherein: the convection heating surface (6) of the inlet of the three flues is connected with the water cooling wall (7) of the back wall of the three flues through the three flues (5) of the DHL boiler.
4. The smoke guide screen for a two-to-three flue of a DHL boiler of claim 1, wherein: high-temperature flue gas circulates between the two flues (4) of the DHL boiler and the three flues (5) of the DHL boiler, and saturated water circulates among the diversion water-cooling screen (1), the diversion water-cooling screen lower header (2) and the diversion water-cooling screen upper header (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320301017.5U CN220017413U (en) | 2023-02-23 | 2023-02-23 | Flue gas guide screen for two-three flues of DHL type boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320301017.5U CN220017413U (en) | 2023-02-23 | 2023-02-23 | Flue gas guide screen for two-three flues of DHL type boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220017413U true CN220017413U (en) | 2023-11-14 |
Family
ID=88671382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320301017.5U Active CN220017413U (en) | 2023-02-23 | 2023-02-23 | Flue gas guide screen for two-three flues of DHL type boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220017413U (en) |
-
2023
- 2023-02-23 CN CN202320301017.5U patent/CN220017413U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |