CN214664350U - Efficient economizer for boiler flue gas - Google Patents
Efficient economizer for boiler flue gas Download PDFInfo
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- CN214664350U CN214664350U CN202120918657.1U CN202120918657U CN214664350U CN 214664350 U CN214664350 U CN 214664350U CN 202120918657 U CN202120918657 U CN 202120918657U CN 214664350 U CN214664350 U CN 214664350U
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- Prior art keywords
- heat exchange
- flue gas
- outlet
- boiler
- exchange box
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- 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
Abstract
The utility model discloses an efficient energy-saving device for boiler flue gas, which comprises a boiler body, wherein the top of the boiler body is provided with a flue outlet, the bottom of the boiler body is provided with a combustion chamber, the flue outlet is provided with an air duct, and the boiler body is communicated with a heat exchange mechanism through the air duct; the heat exchange mechanism comprises a heat exchange box, one side of the heat exchange box is provided with a cold water inlet, the other side of the heat exchange box is provided with a hot water outlet, a spiral coil is arranged in the heat exchange box, the spiral coil is vertically arranged in an inner cavity of the boiler body, the inlet end of the spiral coil is communicated with the cold water inlet, the outlet end of the spiral coil is communicated with the hot water outlet, and the hot water outlet is communicated with the inner cavity of the boiler body through a boiler water supply pipe; the top of the heat exchange box is provided with a flue gas inlet, the side wall of the lower part of the heat exchange box is provided with a flue gas outlet, the bottom of the heat exchange box is provided with a conical opening, and the bottom of the conical opening is provided with a dust outlet. The utility model is not only simple in structure, the heat loss is little, and waste heat recovery rate is high moreover, reaches energy saving and emission reduction's purpose, has extensive suitability.
Description
Technical Field
The utility model relates to an economizer especially relates to an economizer is used to efficient boiler flue gas.
Background
In various industrial production, a large amount of industrial boilers are used, and a large amount of flue gas is generated after the boilers are combusted. The flue gas is directly discharged after being subjected to dust removal and purification treatment in the prior art, a large amount of heat can be taken away from the combustion furnace by neglecting the flue gas, so that not only is the waste of heat energy caused, but also the combustion rate of combustion substances in the combustion furnace can be influenced, and the research shows that the temperature of the discharged flue gas is reduced, so that the combustion rate of the combustion substances in the combustion furnace can be effectively improved. The energy-saving device for flue gas in the current market is complex in structure, and in the recovery process, a part of heat is emitted to the air from the shell to cause heat waste, so that the energy-saving device for boiler flue gas, which is small in heat loss, high in waste heat recovery efficiency and energy-saving, is urgently needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides an energy-saving device for efficient boiler flue gas.
In order to solve the technical problem, the utility model discloses a technical scheme is: an efficient energy-saving device for boiler flue gas comprises a boiler body, wherein a smoke outlet is formed in the top of the boiler body, a combustion cavity is formed in the bottom of the boiler body, a gas guide pipe is arranged at the smoke outlet, and the boiler body is communicated with a heat exchange mechanism through the gas guide pipe;
the heat exchange mechanism comprises a heat exchange box, one side of the heat exchange box is provided with a cold water inlet, the other side of the heat exchange box is provided with a hot water outlet, a spiral coil is arranged in the heat exchange box, the spiral coil is vertically arranged in an inner cavity of the boiler body, the inlet end of the spiral coil is communicated with the cold water inlet, the outlet end of the spiral coil is communicated with the hot water outlet, and the hot water outlet is communicated with the inner cavity of the boiler body through a boiler water supply pipe;
the top of the heat exchange box is provided with a flue gas inlet, the side wall of the lower part of the heat exchange box is provided with a flue gas outlet, the bottom of the heat exchange box is provided with a conical opening, and the bottom of the conical opening is provided with a dust outlet;
the outer wall of the heat exchange box is provided with a coiled pipe from top to bottom, an air inlet of the coiled pipe is positioned at the upper part of the heat exchange box, and an air outlet of the coiled pipe is communicated with an air inlet pipe of the combustion chamber.
Furthermore, the heat exchange box comprises an inner heat insulation layer, a vacuum layer and an outer heat insulation layer from inside to outside, the heat exchange box comprises an upper box body and a lower box body from top to bottom, and the diameter of the upper box body is smaller than that of the lower box body.
Furthermore, an annular support frame is arranged in the heat exchange box above the smoke outlet, the spiral coil is fastened and connected with the boiler body through the annular support frame, and rectangular or H-shaped fins are arranged on the outer wall of the spiral coil at intervals.
Furthermore, an anti-impact baffle is arranged on the inner wall of the heat exchange box at the flue gas outlet.
Further, the air inlet of the coiled pipe is connected with the air blower.
Further, the dust outlet is connected with the dust outlet pipe.
Further, the cone opening is located below the flue gas outlet.
The utility model is not only simple in structure, the heat loss is little, and waste heat recovery efficiency is high moreover, has reached energy saving and emission reduction's purpose, has extensive suitability.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a boiler body; 2. a combustion chamber; 3. a smoke outlet; 4. an air duct; 5. a heat exchange box; 6. a serpentine tube; 7. a boiler feed pipe; 8. a flue gas inlet; 9. a flue gas outlet; 10. an anti-impact baffle plate; 11. an ash discharging pipe; 12. a dust outlet; 51. a cold water inlet; 52. a hot water outlet; 53. a helical coil; 61. an air inlet; 21. an air inlet pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the efficient energy-saving device for boiler flue gas comprises a boiler body 1, wherein a flue gas outlet 3 is formed in the top of the boiler body 1, a combustion chamber 2 is formed in the bottom of the boiler body 1, a gas guide tube 4 is arranged at the flue gas outlet 3, and the boiler body 1 is communicated with a heat exchange mechanism through the gas guide tube 4; the smoke generated after the fuel is combusted in the combustion cavity 2 is discharged from the smoke outlet 3 after heat exchange. The flue gas discharged from the boiler body 1 enters the heat exchange mechanism from the flue gas inlet 8, and after heat exchange, the flue gas is discharged from the flue gas outlet 9 at the bottom. The heat exchange mechanism is used for absorbing heat in the flue gas, heating cold water by utilizing the heat, and conveying the heated hot water to the boiler body 1 for use.
The heat exchange mechanism comprises a heat exchange box 5, one side of the heat exchange box 5 is provided with a cold water inlet 51, the other side of the heat exchange box 5 is provided with a hot water outlet 52, a spiral coil 53 is arranged in the heat exchange box 5, the spiral coil 53 is vertically arranged in the inner cavity of the boiler body 1, the inlet end of the spiral coil 53 is communicated with the cold water inlet 51, the outlet end of the spiral coil 53 is communicated with the hot water outlet 52, and the hot water outlet 52 is communicated with the inner cavity of the boiler body 1 through a boiler water supply pipe 7;
wherein, the top of the heat exchange box 5 is provided with a flue gas inlet 8, the side wall of the lower part is provided with a flue gas outlet 9, the bottom of the heat exchange box 5 is provided with a conical opening, and the bottom of the conical opening is provided with a dust outlet 12; the cone opening is located below the flue gas outlet 9. The dust outlet 12 is connected with the dust outlet pipe 11. The flue gas is cyclone downward and the soot in the hot flue gas falls under gravity and enters the dust outlet 12 through the conical opening. By adopting cyclone dust removal, the flue gas entering the heat exchange box 5 collides with the spiral coil 53, the scorching smoke collides with the surface of the spiral coil 53, the flue gas speed near the pipe wall of the spiral coil 53 is lowest, and the smoke falls into the dust outlet 12 under the action of gravity, so that the effects of smoke prevention and dust removal are achieved, and the heat exchange efficiency is improved.
Wherein, the outer wall of the heat exchange box 5 is provided with a coiled pipe 6 from top to bottom, an air inlet 61 of the coiled pipe 6 is positioned at the upper part of the heat exchange box 5, and an air outlet is communicated with an air inlet pipe 21 of the combustion chamber 2. The inlet 61 of the serpentine 6 is connected to a blower. The air entering the boiler enters the coil pipe 6 outside the heat exchange box 5 first, and carries out preliminary heat exchange with the smoke dust entering the heat exchange box 5 and the separated dust, so that the air entering the boiler is hot air, the combustion efficiency in the boiler is improved, and the effect of cooling the separated dust is achieved.
The heat exchange box 5 comprises an inner heat insulation layer, a vacuum layer and an outer heat insulation layer from inside to outside, the heat exchange box 5 is separated from inside to outside by arranging three heat insulation layers, so that heat loss is avoided, particularly, the vacuum layer is arranged, the characteristic of heat non-transmission in vacuum is utilized, the inside and the outside of the box body are effectively separated, smoke heat in the box body is prevented from being dissipated to surrounding air through the box body, and energy waste is avoided; the heat exchange box 5 comprises an upper box body and a lower box body from top to bottom, and the diameter of the upper box body is smaller than that of the lower box body. After the flue gas got into box down from last box, because the diameter increases, under the unchangeable condition of pressure and temperature, the flow velocity of flue gas will have the decline of certain degree, can increase the time of flue gas and the heat transfer of spiral coil 53, absorbs the heat in the flue gas as far as possible, reduces thermal loss.
Wherein, an annular support frame is arranged in the heat exchange box 5 above the flue gas outlet 9, the spiral coil 53 is fastened and connected with the boiler body 1 through the annular support frame, and rectangular or H-shaped fins are arranged on the outer wall of the spiral coil 53 at intervals. Cold water enters the spiral coil 53 from the cold water inlet 51 and flows back and forth in the spiral coil 53, so that the heat exchange time and the heat exchange area are increased, and the heat exchange efficiency is improved. When cold water passes through the spiral coil 53, the cold water continuously absorbs heat in the flue gas, the water temperature is increased, and then the cold water is sent into the boiler through the boiler water feeding pipe 7, so that the heat in the flue gas is absorbed, the energy waste is avoided, preheated boiler water is provided for the boiler, and the purposes of energy conservation and emission reduction are achieved.
Wherein, the inner wall of the heat exchange box 5 at the flue gas outlet 9 is provided with an anti-impact baffle plate 10. Flue gas is followed flue gas inlet 8 and is gone into the box, can cause the impact to being in the spiral coil 53 on upper strata, and the time is a long time, and this part spiral coil 53 can be corroded, is broken because of erodeing, reduces its life, and scour protection baffle 10 can effectively prevent the flue gas to spiral coil 53's impact, increase of service life.
The utility model discloses a working process does: the air entering the boiler body firstly enters the coil pipe 6 outside the heat exchange box 5 to carry out primary heat exchange with the smoke dust entering the heat exchange box 5 and the separated dust, and the hot air after heat exchange enters the combustion chamber 2 through the air inlet pipe 21, so that the air entering the boiler is the hot air, the combustion efficiency in the boiler is improved, and the effect of cooling the separated dust is achieved; flue gas in the combustion chamber 2 enters the air duct 4 through the smoke outlet 3, flue gas discharged from the boiler body 1 enters the heat exchange box 5 from the flue gas inlet 8 through the air duct 4, and exchanges heat with cold water in the spiral coil 53 while descending along the heat exchange box 5, and meanwhile cold water enters the spiral coil 53 from the cold water inlet 51 and flows back and forth in the spiral coil 53, after heat exchange, flue gas is discharged from the flue gas outlet 9 at the bottom, and hot water after heat exchange is finished enters the boiler through the boiler water supply pipe 7, so that heat in the flue gas is absorbed, waste of energy is avoided, preheated boiler water is provided for the boiler, and the purposes of energy conservation and emission reduction are achieved.
The utility model not only reduces the temperature of the flue gas discharged by the boiler and the temperature of the dust separated from the flue gas, but also improves the temperature of the air entering the boiler, and further improves the combustion rate of the fuel in the boiler; meanwhile, the waste of heat is reduced, energy is saved, the environment is protected, the efficiency is high, and the production and the combustion rate of a boiler are facilitated. In addition, the design structure is simple, the heat loss is small, the waste heat recovery efficiency is high, and the waste heat recovery device can be widely applied to energy-saving devices for smoke of various boilers.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides an efficient economizer for boiler flue gas, includes boiler body (1), its characterized in that: the boiler comprises a boiler body (1), a smoke outlet (3) is formed in the top of the boiler body (1), a combustion cavity (2) is formed in the bottom of the boiler body, an air guide pipe (4) is arranged at the smoke outlet (3), and the boiler body (1) is communicated with a heat exchange mechanism through the air guide pipe (4);
the heat exchange mechanism comprises a heat exchange box (5), one side of the heat exchange box (5) is provided with a cold water inlet (51), the other side of the heat exchange box is provided with a hot water outlet (52), a spiral coil (53) is arranged in the heat exchange box (5), the spiral coil (53) is vertically arranged in an inner cavity of the boiler body (1), the inlet end of the spiral coil (53) is communicated with the cold water inlet (51), the outlet end of the spiral coil is communicated with the hot water outlet (52), and the hot water outlet (52) is communicated with the inner cavity of the boiler body (1) through a boiler water supply pipe (7);
the top of the heat exchange box (5) is provided with a flue gas inlet (8), the side wall of the lower part of the heat exchange box is provided with a flue gas outlet (9), the bottom of the heat exchange box (5) is provided with a conical opening, and the bottom of the conical opening is provided with a dust outlet (12);
the outer wall of the heat exchange box (5) is provided with a coiled pipe (6) from top to bottom, an air inlet (61) of the coiled pipe (6) is positioned at the upper part of the heat exchange box (5), and an air outlet is communicated with an air inlet pipe (21) of the combustion chamber (2).
2. The energy-saving device for high-efficiency boiler flue gas according to claim 1, characterized in that: the heat exchange box (5) comprises an inner heat insulation layer, a vacuum layer and an outer heat insulation layer from inside to outside, the heat exchange box (5) comprises an upper box body and a lower box body from top to bottom, and the diameter of the upper box body is smaller than that of the lower box body.
3. The energy-saving device for high-efficiency boiler flue gas according to claim 2, characterized in that: an annular support frame is arranged in the heat exchange box (5) above the flue gas outlet (9), the spiral coil (53) is connected with the boiler body (1) in a fastening mode through the annular support frame, and rectangular or H-shaped fins are arranged on the outer wall of the spiral coil (53) at intervals.
4. The energy-saving device for high-efficiency boiler flue gas according to claim 3, characterized in that: an anti-impact baffle (10) is arranged on the inner wall of the heat exchange box (5) at the flue gas outlet (9).
5. The energy-saving device for high-efficiency boiler flue gas according to claim 4, wherein: and an air inlet (61) of the coiled pipe (6) is connected with a blower.
6. The energy-saving device for high-efficiency boiler flue gas according to claim 5, wherein: the dust outlet (12) is connected with the dust outlet pipe (11).
7. The energy-saving device for high-efficiency boiler flue gas according to any one of claims 1 to 6, wherein: the conical opening is located below the flue gas outlet (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918657.1U CN214664350U (en) | 2021-04-29 | 2021-04-29 | Efficient economizer for boiler flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120918657.1U CN214664350U (en) | 2021-04-29 | 2021-04-29 | Efficient economizer for boiler flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214664350U true CN214664350U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120918657.1U Expired - Fee Related CN214664350U (en) | 2021-04-29 | 2021-04-29 | Efficient economizer for boiler flue gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN214664350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114868568A (en) * | 2022-04-28 | 2022-08-09 | 新疆农业科学院农业机械化研究所 | Greenhouse temperature adjusting device for indoor agricultural production |
-
2021
- 2021-04-29 CN CN202120918657.1U patent/CN214664350U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114868568A (en) * | 2022-04-28 | 2022-08-09 | 新疆农业科学院农业机械化研究所 | Greenhouse temperature adjusting device for indoor agricultural production |
| CN114868568B (en) * | 2022-04-28 | 2023-05-30 | 新疆农业科学院农业机械化研究所 | Greenhouse temperature adjusting device for indoor agricultural production |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |