CN202485507U - Boiler flue gas waste heat recovery device - Google Patents
Boiler flue gas waste heat recovery device Download PDFInfo
- Publication number
- CN202485507U CN202485507U CN2012200659759U CN201220065975U CN202485507U CN 202485507 U CN202485507 U CN 202485507U CN 2012200659759 U CN2012200659759 U CN 2012200659759U CN 201220065975 U CN201220065975 U CN 201220065975U CN 202485507 U CN202485507 U CN 202485507U
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- flue
- water tank
- heat
- cyclic water
- retracting device
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Abstract
The utility model discloses a boiler flue gas waste heat recovery device which comprises a flue and a circulating water tank, wherein the flue is arranged at the lower part of the device, the circulating water tank is arranged at the upper part of the flue, the two ends of the flue are respectively formed into a flue gas inlet and a flue gas outlet, the two ends of the circulating water tank are respectively formed into a water inlet and a water outlet, a plurality of heat pipes are vertically arranged in the flue, and the upper part of each heat pipe extends upwards to the inside of the circulating water tank. The waste heat recovery device disclosed by the utility model is high in heat exchange efficiency and does not corrode equipment and pipelines.
Description
Background technology
Large-sized boiler all is equipped with cast iron pipe or stainless steel type economizer, is used for the feedwater of combustion air or preboiler.But owing to all contain sulphur in the oil, coal, gas fuel, when burning, can produce sulfur oxide, sulfur oxide with promptly form sulfuric acid vapor after steam combines.When the metallic walls surface temperature of heated surface at the end of boiler is lower than the set point (being acid dew point) of sulfuric acid vapor, will form liquid sulfuric acid on its surface.For a long time, objects such as economizer have had a strong impact on the security of operation of boiler owing to corrosion even the perforation phenomenon that dewfall causes takes place often.Present boiler all is to alleviate the generation of dewfall and corrosion phenomenon through improving exhaust gas temperature, causes the boiler smoke temperature very high, thereby causes a large amount of heats to be dispersed in the atmosphere, has not only wasted resource but also contaminated environment.Therefore, reclaim necessary to residual heat from boiler fume.
And in practical application, residual heat from boiler fume is recycled has certain degree of difficulty.This is because if exhaust gas temperature is low excessively; Adopt conventional heat exchanger; The heat transfer temperature difference of flue gas and working medium reduces in the heated surface at the end of boiler, and heat transfer area increases, and the pipe of arranging in the confined space is many and close; Cause the flow of flue gas resistance to increase, the increase of air-introduced machine power, metal consumption and equipment initial investment increase.Generally speaking, 15 ℃～20 ℃ of the every risings of exhaust gas temperature, boiler thermal output approximately reduces by 1%; Otherwise, 15 ℃～20 ℃ of the every reductions of exhaust gas temperature, boiler thermal output approximately raises 1%.In practical application, cross when low when exhaust gas temperature, can make the wall temperature of low temperature heating surface be lower than acid dew point, cause the heavy corrosion of heating surface metal, jeopardize boiler operatiopn safety.
Summary of the invention
The purpose of the utility model provide a kind of heat exchange efficiency high, can not etching apparatus and the residual heat from boiler fume retracting device of pipeline.
For this reason, the technical scheme of the utility model is following:
A kind of residual heat from boiler fume retracting device; Comprise: the flue and the cyclic water tank that is arranged on flue top that are arranged on the bottom; Be formed with a gas approach and an exhanst gas outlet respectively at the two ends of said flue, be formed with a water inlet and a delivery port respectively, in said flue, be vertically installed with many heat pipes at the two ends of said cyclic water tank; The top of every heat pipe all extends upward in the said cyclic water tank, and heat pipe and flue and cyclic water tank interface are and are tightly connected.
Preferably, said many heat pipes evenly distribute in said flue, and said water inlet is arranged on the cyclic water tank bottom of said exhanst gas outlet one side, and said delivery port is arranged on the cyclic water tank top of said gas approach one side.
Preferably, on the outer wall of every said heat pipe, be formed with a plurality of radiating fins respectively; Be respectively arranged with safety valve, Pressure gauge and thermometer at said cyclic water tank top; Cyclic water tank bottom in said delivery port one side also is provided with sewage draining exit.
The heat pipe that uses in the residual heat from boiler fume retracting device of the utility model is the high heat exchange element of sensitivity, and it transmits heat each other between the vacuum liquid in pipe, and the vacuum inside thermal resistance is little, has good isothermal performance.Heat Transfer of Heat Pipe on Heat Pipe leans on the interior liquid phase-change of vacuum tube to carry out, and has the advantages that volume is little, heat transfer efficiency is high, and radiating fin can further improve heat exchange efficiency; In addition, heat pipe has extremely strong resistance to corrosion, makes the dew-point temperature of tube wall temperature a little more than flue gas during design; So just can dewfall during the sweep of gases heat pipe; Sulphur in the flue gas can not overflow, but discharges with flue gas, so heat pipe, flue and pipeline can not be corroded.
Description of drawings
Fig. 1 is the structural representation of the residual heat from boiler fume retracting device of the utility model;
Fig. 2 is the schematic diagram of residual heat from boiler fume retracting device among Fig. 1.
The specific embodiment
Specify below in conjunction with the structure of accompanying drawing the residual heat from boiler fume retracting device of the utility model.
The structure of this residual heat from boiler fume retracting device is as shown in Figure 1: the bottom is a flue 1, and top is cyclic water tank 2.Be formed with a gas approach (not shown) and an exhanst gas outlet (not shown) respectively at the two ends of flue 1.Be formed with a water inlet 3 and a delivery port 4 at the two ends of cyclic water tank 2 respectively, in flue 1, be vertically installed with many heat pipes 5, the top of every heat pipe 5 all extends upward to cyclic water tank 2, and heat pipe 5 is with flue 1 and cyclic water tank 2 interfaces and is tightly connected.
Many heat pipes 7 evenly distribute in flue, and water inlet 3 is arranged on the cyclic water tank bottom of exhanst gas outlet one side, and delivery port 4 is arranged on the cyclic water tank top of gas approach one side, thereby make flue gas and recirculated water form adverse current, improve heat exchanger effectiveness.
As shown in Figure 2, in order to improve heat exchange efficiency, can on the outer wall of every heat pipe 5, be formed with a plurality of radiating fins 6 respectively.In addition, also be provided with sewage draining exit 7 in the cyclic water tank bottom of said delivery port one side.For the ease of monitoring, also be respectively arranged with at cyclic water tank 2 tops and be provided with safety valve 8, Pressure gauge 9 and thermometer 10.
Referring to Fig. 2, during work, flow through flue and wash away the heat pipe lower end of flue gas conducts to the heat pipe upper end with heat after the heat pipe heat absorption, and water is heated in heat pipe upper end heat release.
In order to prevent stifled ash and corrosion, the waste-heat recoverer exit gas temperature generally is controlled at more than the dew point, i.e. fuel oil, coal-burning boiler exhaust gas temperature ≮ 130 ℃ can fuel savings more than 5%.
This residual heat from boiler fume retracting device is installed in the boiler mouth, and the water under high pressure circulating pump is installed below again, and the fume afterheat of recovery is used to add hot water; Can economize on resources so on the one hand; The waste heat that reclaims on the other hand can utilize again, for example, can be used for heating in the winter time.In heat transfer process, flue-gas temperature can drop to about 100 ℃ by 300 ℃, per hour can produce 1.15 tons of the steam of 173 degree, reclaims the heat of 740,000 kilocalories, can be enterprise's considerable economic benefit.
Claims (5)
1. residual heat from boiler fume retracting device; It is characterized in that: comprise flue that is arranged on the bottom and the cyclic water tank that is arranged on flue top; Be formed with a gas approach and an exhanst gas outlet respectively at the two ends of said flue; Be formed with a water inlet and a delivery port respectively at the two ends of said cyclic water tank; In said flue, be vertically installed with many heat pipes, the top of every heat pipe all extends upward in the said cyclic water tank, and heat pipe and flue and cyclic water tank interface are and are tightly connected.
2. residual heat from boiler fume retracting device according to claim 1; It is characterized in that: said many heat pipes evenly distribute in said flue; Said water inlet is arranged on the cyclic water tank bottom of said exhanst gas outlet one side, and said delivery port is arranged on the cyclic water tank top of said gas approach one side.
3. residual heat from boiler fume retracting device according to claim 1 is characterized in that: on the outer wall of every said heat pipe, be formed with a plurality of radiating fins respectively.
4. according to each described residual heat from boiler fume retracting device in the claim 1～3, it is characterized in that: be respectively arranged with safety valve, Pressure gauge and thermometer at said cyclic water tank top.
5. residual heat from boiler fume retracting device according to claim 4 is characterized in that: the cyclic water tank bottom in said delivery port one side also is provided with sewage draining exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200659759U CN202485507U (en) | 2012-02-27 | 2012-02-27 | Boiler flue gas waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200659759U CN202485507U (en) | 2012-02-27 | 2012-02-27 | Boiler flue gas waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202485507U true CN202485507U (en) | 2012-10-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200659759U Expired - Fee Related CN202485507U (en) | 2012-02-27 | 2012-02-27 | Boiler flue gas waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202485507U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123232A (en) * | 2013-02-05 | 2013-05-29 | 黄连杰 | Externally-arranged liquid-dredging valve and working medium storage tank combination type heat pipe heat exchanger |
| CN103727522A (en) * | 2013-12-06 | 2014-04-16 | 靖江市宝钢空调设备厂 | Heat pipe type economizer |
| CN104279753A (en) * | 2014-08-07 | 2015-01-14 | 长兴新峰印染有限公司 | Flue residual heat recovery type heat transfer oil boiler |
| CN109058956A (en) * | 2018-05-07 | 2018-12-21 | 浙江天英环保科技有限公司 | Flue gas heat exchanger |
-
2012
- 2012-02-27 CN CN2012200659759U patent/CN202485507U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123232A (en) * | 2013-02-05 | 2013-05-29 | 黄连杰 | Externally-arranged liquid-dredging valve and working medium storage tank combination type heat pipe heat exchanger |
| CN103727522A (en) * | 2013-12-06 | 2014-04-16 | 靖江市宝钢空调设备厂 | Heat pipe type economizer |
| CN104279753A (en) * | 2014-08-07 | 2015-01-14 | 长兴新峰印染有限公司 | Flue residual heat recovery type heat transfer oil boiler |
| CN109058956A (en) * | 2018-05-07 | 2018-12-21 | 浙江天英环保科技有限公司 | Flue gas heat exchanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20180227 |
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| CF01 | Termination of patent right due to non-payment of annual fee |