CN218864209U - System for boiler flue gas waste heat recovery heating boiler air supply - Google Patents
System for boiler flue gas waste heat recovery heating boiler air supply Download PDFInfo
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- CN218864209U CN218864209U CN202222581862.0U CN202222581862U CN218864209U CN 218864209 U CN218864209 U CN 218864209U CN 202222581862 U CN202222581862 U CN 202222581862U CN 218864209 U CN218864209 U CN 218864209U
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- circulating water
- flue gas
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- heating
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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
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Abstract
The utility model relates to a boiler technical field specifically is a system of boiler flue gas waste heat recovery heating boiler air supply, it can effectively utilize the waste heat of boiler flue gas, the recycle increases the thermal efficiency, it includes the boiler, the cold wind entrance point of boiler is provided with the air-blower, the exhanst gas outlet end is provided with the draught fan, the exit linkage chimney of draught fan, be provided with heat pipe exchanger between the exhanst gas outlet end of boiler and the draught fan, be provided with hot-water heating fan heater between the cold wind entrance point of air-blower and boiler, heat pipe exchanger includes the heat exchanger casing, the flue gas import has been seted up to heat exchanger casing one end, the exhanst gas outlet has been seted up to the other end, be provided with circulating water pipe in the heat exchanger casing, be provided with circulating water import and circulating water outlet with circulating water pipe both ends intercommunication on the heat exchanger casing, the circulating water import, through being connected water pipe and circulating pump connection between circulating water outlet and the hot-water heating fan heater.
Description
Technical Field
The utility model relates to a boiler technical field specifically is a system of boiler flue gas waste heat recovery heating boiler air supply.
Background
Natural gas resources in China are distributed in Xinjiang, shaanxi and other places, and the temperature is below zero in winter. All chemical enterprises built according to the ground adopt natural gas as boiler fuel. The natural gas has the characteristics of high heat value, simple components and the like, and compared with the fire coal, the sulfur content and the nitrogen content of the natural gas are greatly reduced, ash components are not generated after combustion, and the smoke components are clean. The exhaust gas temperature of the existing gas boiler is about 140 ℃, and the exhaust gas is directly discharged without being treated basically after being discharged from the boiler. When the acid dew point is less than 70 ℃ and the water vapor condensation temperature is 100 ℃, the direct exhaust heat loss is larger. Meanwhile, a steam drum is generally used for steam extraction and heating for a fan heater for heating air, and the use of heating steam also has great influence on the heat efficiency of the unit.
Disclosure of Invention
Direct emission causes the heat loss big in order to solve current boiler flue gas to the problem that the steam extraction heating influences the unit thermal efficiency in the steam pocket, the utility model provides a system of boiler flue gas waste heat recovery heating boiler air supply, its waste heat that can effectively utilize the boiler flue gas, recycle raises the thermal efficiency.
The technical scheme is as follows: the utility model provides a system for boiler flue gas waste heat recovery heats boiler air supply, its includes the boiler, the cold wind entrance point of boiler is provided with the air-blower, the exhanst gas outlet end is provided with the draught fan, the exit linkage chimney of draught fan, its characterized in that, the exhanst gas outlet end of boiler with be provided with heat pipe exchanger between the draught fan, the air-blower with be provided with hot-water heating fan heater between the cold wind entrance point of boiler, heat pipe exchanger includes the heat exchanger casing, flue gas inlet, other end have been seted up to heat exchanger casing one end, the exhanst gas outlet has been seted up to the other end, be provided with circulating water pipe in the heat exchanger casing, be provided with on the heat exchanger casing with circulating water import and circulating water export of circulating water pipe both ends intercommunication, circulating water import, circulating water export with through connecting water pipe and circulating pump connection between the hot-water heating fan heater.
The system is further characterized in that a three-way joint is arranged behind the circulating pump group, one outlet of the three-way joint is connected with the water-heating air heater, and the other outlet of the three-way joint is connected with an indoor water-heating radiator;
the circulating pump is provided with two parallelly connected ways and all is provided with the control valve.
Adopt the utility model discloses afterwards, heat pipe exchanger is sent into earlier to boiler exhaust high temperature flue gas, with the aqueous medium heat transfer in the circulating water pipe, send into the chimney through the draught fan after letting the flue gas temperature decline and discharge, the circulating pump is sent into to water after the heating, send into the warm air heater of water after utilizing the circulating pump pressure boost, the cold air that the air-blower sent into and the heat transfer of hot-water heating air heater, the inlet air temperature of boiler has been improved, flue gas waste heat heating boiler air supply, can effectively practice thrift boiler steam, the system thermal efficiency is improved, waste heat utilization, save unit running cost, economic benefits is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of a heat pipe heat exchanger;
FIG. 3 is a side view of a heat pipe heat exchanger.
Detailed Description
See fig. 1, fig. 2, fig. 3 shows, a system for supplying air to a boiler by recovering waste heat from flue gas of the boiler, which includes a boiler 1, a cold air inlet of the boiler 1 is provided with an air blower 2, a hot air outlet is provided with an induced draft fan 3, an outlet of the induced draft fan 3 is connected with a chimney 4, a heat pipe exchanger 5 is arranged between the hot air outlet of the boiler 1 and the induced draft fan 3, a water heating air heater 6 is arranged between the cold air inlet of the air blower 2 and the cold air inlet of the boiler 1, the heat pipe exchanger 5 includes a heat exchanger shell 7, a flue gas inlet 8 is arranged at one end of the heat exchanger shell 7, a flue gas outlet 9 is arranged at the other end of the heat exchanger shell 7, a circulating water inlet 11 and a circulating water outlet 12 which are communicated with two ends of the circulating water pipe 10 are arranged on the heat exchanger shell 7, the circulating water inlet 11, the circulating water outlet 12 is connected with the air heater 6 by a connecting water pipe 13 and a circulating pump 14, the circulating pump 14 is provided with two parallel-way and is provided with a control valve 15, which can realize switching between different ways, when one way fails, continuous work is ensured.
A three-way joint can be arranged behind the circulating pump group, one outlet of the three-way joint is connected with the water-heating air heater, the other outlet of the three-way joint is connected with the indoor water-heating radiator under the normal condition, all circulating water discharged by the circulating pump group enters the water-heating air heater 6, when indoor heating is needed in winter, the circulating water is controlled through a valve, and part of hot water is fed into the indoor water-heating radiator to be heated.
The flue gas with the temperature of 140 ℃ sent out by the boiler 1 enters the heat pipe exchanger 5 to exchange heat with the heat medium (water), the temperature of the flue gas is reduced to 105 ℃ after heat exchange, and the flue gas is discharged from the chimney 4 through the induced draft fan. The heat medium after heat absorption enters the water heating air heater 6 to heat the air supplied by the boiler, and the heat absorbed air supplied enters the subsequent air preheater to be heated again. The heat medium cooled after heat exchange enters the circulating pump 14 for circulation.
Claims (3)
1. The utility model provides a system for boiler flue gas waste heat recovery heats boiler air supply, its includes the boiler, the cold wind entrance point of boiler is provided with the air-blower, the exhanst gas outlet end is provided with the draught fan, the exit linkage chimney of draught fan, a serial communication port, the exhanst gas outlet end of boiler with be provided with heat pipe exchanger between the draught fan, the air-blower with be provided with hot-water heating fan heater between the cold wind entrance point of boiler, heat pipe exchanger includes the heat exchanger casing, flue gas inlet has been seted up to heat exchanger casing one end, the exhanst gas outlet has been seted up to the other end, be provided with circulating water pipe in the heat exchanger casing, be provided with on the heat exchanger casing with circulating water inlet and the circulating water export of circulating water pipe both ends intercommunication, circulating water inlet, circulating water export with through connecting water pipe and circulating pump connection between the hot-water heating fan heater.
2. The system for supplying air to the boiler by recovering the waste heat of the boiler flue gas and heating the boiler according to the claim 1, wherein a three-way joint is arranged behind the circulating pump group, one outlet of the three-way joint is connected with the water-heating air heater, and the other outlet of the three-way joint is connected with an indoor water-heating radiator.
3. The system for supplying air to the boiler through the recovery of the waste heat of the boiler flue gas and the heating of the boiler as claimed in claim 1, wherein the circulating pump is provided with two parallel paths and control valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222581862.0U CN218864209U (en) | 2022-09-29 | 2022-09-29 | System for boiler flue gas waste heat recovery heating boiler air supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222581862.0U CN218864209U (en) | 2022-09-29 | 2022-09-29 | System for boiler flue gas waste heat recovery heating boiler air supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218864209U true CN218864209U (en) | 2023-04-14 |
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ID=87363850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222581862.0U Active CN218864209U (en) | 2022-09-29 | 2022-09-29 | System for boiler flue gas waste heat recovery heating boiler air supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218864209U (en) |
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2022
- 2022-09-29 CN CN202222581862.0U patent/CN218864209U/en active Active
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