CN211925818U - Air heater system for heat exchange of flue gas at tail of boiler - Google Patents
Air heater system for heat exchange of flue gas at tail of boiler Download PDFInfo
- Publication number
- CN211925818U CN211925818U CN202020269867.8U CN202020269867U CN211925818U CN 211925818 U CN211925818 U CN 211925818U CN 202020269867 U CN202020269867 U CN 202020269867U CN 211925818 U CN211925818 U CN 211925818U
- Authority
- CN
- China
- Prior art keywords
- flue
- air heater
- warm braw
- ware
- braw ware
- 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.)
- Expired - Fee Related
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000003546 flue gas Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract 1
- 239000000779 smoke Substances 0.000 description 5
- 235000019504 cigarettes Nutrition 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 108010063955 thrombin receptor peptide (42-47) Proteins 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Images
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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Air Supply (AREA)
Abstract
A fan heater system for boiler afterbody flue gas heat transfer. In the prior art, a heat exchanger is arranged in a flue, so that the hard ash particles of flue gas severely abrade a heating surface, the reliability is poor, the resistance of a flue gas duct is increased, and the power consumption rate of an induced draft fan is increased. The utility model discloses the constitution includes: warm braw ware steam trap (6), warm braw ware steam trap pass through the pipeline respectively with primary air warm braw ware A (1), primary air warm braw ware B (2), overgrate air warm braw ware A (3), overgrate air warm braw ware B (4) are connected, the exit linkage of primary air warm braw ware A and flue D (12), the exit linkage of primary air warm braw ware B and flue C (13), the exit linkage of overgrate air warm braw ware A and flue B (14), the exit linkage of overgrate air warm braw ware B and flue A (15), flue A, flue B, flue C, flue D are respectively through flue branch entry regulation control door (11) connection warm braw ware drainage cycle system (10). The utility model is used for fan heater system of boiler afterbody flue gas heat transfer.
Description
Technical Field
The utility model relates to an energy power, electric power technical field, concretely relates to air heater system for heat transfer of boiler afterbody flue gas.
Background
In recent years, with the continuous promotion of the deep emission reduction of NOx in a thermal power plant, ammonium bisulfate in an air preheater of a boiler is deposited to cause high differential pressure of the air preheater, poor heat exchange effect and influence on the rise of exhaust gas temperature, so that the heat loss of the exhaust gas is increased.
Disclosure of Invention
The utility model aims at providing a fan heater system for heat transfer of boiler afterbody flue gas, this structure is used for the fan heater system of air supply heating with boiler afterbody flue gas heat transfer, improves air preheater entry wind temperature > 70 ℃, and air preheater export smoke temperature rises about 30 ℃.
The above purpose is realized by the following technical scheme:
a fan heater system for heat exchange of boiler tail flue gas comprises: warm braw ware steam trap 6, warm braw ware steam trap pass through the pipeline respectively with primary air warm braw ware A, primary air warm braw ware B, overgrate air warm braw ware A, overgrate air warm braw ware B and be connected, primary air warm braw ware A and flue D's exit linkage, primary air warm braw ware B and flue C's exit linkage, overgrate air warm braw ware A and flue B's exit linkage, overgrate air warm braw ware B and flue A's exit linkage, flue A flue B flue C flue D connect warm braw ware hydrophobic circulation system through flue branch entry regulation control door respectively, warm braw ware hydrophobic circulation system pass through the pipeline with warm braw ware steam trap connect.
The steam trap of the air heater is connected with a water replenishing valve through a water replenishing pipeline, the steam trap of the air heater is respectively connected with a steam trap drainage pump A and a steam trap drainage pump B through pipelines, and the steam trap of the air heater is connected with a drainage valve through an outer discharge pipeline.
The air heater system for the heat exchange of the flue gas at the tail part of the boiler is characterized in that the flue A, the flue B, the flue C and the flue D are heat exchange pipelines which are arranged outside the wall plate of the branch flue gas duct in a countercurrent mode.
Has the advantages that:
1. the utility model provides a boiler afterbody flue gas heat transfer is used for warm air system of air supply heating, this structure can improve air preheater export hot air temperature, is of value to the buggy and catches fire, reduces the heat loss of discharging fume, improves boiler efficiency, improves air preheater cold junction temperature, prevents effectively that ammonium bisulfate from at air preheater cold junction deposit, reduces the fan power consumption, improves air preheater heat transfer performance.
The utility model discloses the heat transfer pipeline that each branch's cigarette wind channel wallboard was arranged against the current outward arranges and does not occupy the cigarette wind channel, can not increase cigarette wind channel resistance, can not cause the draught fan power consumption to rise, can improve air preheater entry air temperature > 70 ℃, air preheater export cigarette temperature rises about 30 ℃.
The utility model discloses an arrangement structure reliability is high, need not to arrange abrasionproof facility or material, need not to arrange soot blowing system, utilizes current fan heater system to improve, and the investment is lower relatively, has saved manufacturing cost.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The specific implementation mode is as follows:
example 1:
a fan heater system for heat exchange of boiler tail flue gas comprises: warm braw ware steam trap 6, warm braw ware steam trap pass through the pipeline and be connected with primary air warm braw ware A1, primary air warm braw ware B2, overgrate air warm braw ware A3, overgrate air warm braw ware B4 respectively, primary air warm braw ware A and flue D12's exit linkage, primary air warm braw ware B and flue C13's exit linkage, overgrate air warm braw ware A and flue B14's exit linkage, overgrate air warm braw ware B and flue A15's exit linkage, flue A flue B flue C flue D respectively through flue branch entry regulation control door 11 connection warm braw ware hydrophobic circulation system 10, warm braw ware hydrophobic circulation system pass through the pipeline with warm braw ware steam trap connect.
Example 2:
according to the air heater system for the heat exchange of the flue gas at the tail of the boiler in the embodiment 1, the drain tank of the air heater is connected with the water replenishing valve 5 through the water replenishing pipeline, the drain tank of the air heater is respectively connected with the drain pump A8 of the air heater and the drain pump B9 of the air heater through pipelines, and the drain tank of the air heater is connected with the drain valve 7 through an outer discharge pipeline.
Example 3:
according to the air heater system for heat exchange of the flue gas at the tail part of the boiler in the embodiment 1 or 2, the flue A, the flue B, the flue C and the flue D are heat exchange pipelines which are arranged outside the wall plates of the branch flue gas duct in a counter-flow mode;
the outlet of the air preheater of the prior art and the dust removal flue are rectangular cross-section wallboards, the wallboards are steel plates (about 10 mm), surrounding channel steel or various light steel reinforcing ribs are arranged around the wallboards, and heat preservation and makeup boards are laid outside the reinforcing ribs; the application overcomes the defects of the traditional technology, the heat exchange pipeline is arranged in a 'counter flow' way outside the reinforcing ribs of the flue wall plate, and the condensed water (from the drain pump of the air heater) after the air heater heats the primary air and the secondary air is arranged in the pipeline;
the outlet and the inlet of each flue heat exchange pipeline are respectively converged on a main pipe, and a flow adjusting door is respectively arranged at each inlet pipeline and used for controlling the flow and the smoke temperature of each flue heat exchanger; a smoke temperature measuring point and a humidity detector are arranged on the side, close to the dust remover, of each flue heat exchange pipeline so as to ensure the safety of a dust removing system; by adding the heat exchange system, according to the heat exchange efficiency of the heat exchange system, the air temperature at the inlet of the air preheater is increased to be more than 70 ℃, the temperature of the smoke at the outlet of the air preheater is increased by about 30 ℃, and the temperature of the smoke at the side of the dust remover is controlled to be reduced to a design value.
Claims (3)
1. A fan heater system for heat exchange of boiler tail flue gas comprises: the steam trap of the air heater, characterized by: the utility model discloses a flue of air heater, including flue C, air heater drain box, secondary air heater A, secondary air heater B, secondary air heater A and flue D's exit linkage, primary air heater B and flue C's exit linkage, secondary air heater A and flue B's exit linkage, secondary air heater B and flue A's exit linkage, flue A flue B flue C flue D connect air heater drain circulation system through flue branch entry regulation control door respectively, air heater drain circulation system pass through the pipeline with air heater drain box connect.
2. The air heater system for the heat exchange of the flue gas at the tail of the boiler as claimed in claim 1, wherein: the steam trap of the air heater is connected with a water replenishing valve through a water replenishing pipeline, the steam trap of the air heater is respectively connected with a steam trap drainage pump A and a steam trap drainage pump B through pipelines, and the steam trap of the air heater is connected with a drainage valve through an outer discharge pipeline.
3. The air heater system for the heat exchange of the flue gas at the tail of the boiler as claimed in claim 2, wherein: the flue A, the flue B, the flue C and the flue D are heat exchange pipelines which are arranged outside the wall board of the branch flue duct in a countercurrent mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020269867.8U CN211925818U (en) | 2020-03-07 | 2020-03-07 | Air heater system for heat exchange of flue gas at tail of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020269867.8U CN211925818U (en) | 2020-03-07 | 2020-03-07 | Air heater system for heat exchange of flue gas at tail of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211925818U true CN211925818U (en) | 2020-11-13 |
Family
ID=73346997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020269867.8U Expired - Fee Related CN211925818U (en) | 2020-03-07 | 2020-03-07 | Air heater system for heat exchange of flue gas at tail of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211925818U (en) |
-
2020
- 2020-03-07 CN CN202020269867.8U patent/CN211925818U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201113 |