CN218884697U - Medium-temperature flue gas waste heat recovery coupled type refrigerating and heating and air preheating system - Google Patents
Medium-temperature flue gas waste heat recovery coupled type refrigerating and heating and air preheating system Download PDFInfo
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- CN218884697U CN218884697U CN202223362403.XU CN202223362403U CN218884697U CN 218884697 U CN218884697 U CN 218884697U CN 202223362403 U CN202223362403 U CN 202223362403U CN 218884697 U CN218884697 U CN 218884697U
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Abstract
The utility model discloses a medium temperature flue gas waste heat recovery coupled refrigeration heating and air preheating system, which comprises a metal material calcining kiln, a heat exchanger, a high-efficiency heat pipe heat exchanger and a lithium bromide heat pump unit; the metal material calcining kiln is connected with a heat exchanger, the heat exchanger is connected with a high-efficiency heat pipe heat exchanger, a flue gas discharge pipeline and a cold air pipeline are connected to the high-efficiency heat pipe heat exchanger, and the high-efficiency heat exchanger is connected with the metal material calcining kiln; the heat exchanger is connected with a lithium bromide heat pump unit; the heat supply water outlet end and the heat supply water inlet end of the lithium bromide heat pump unit are respectively connected with a heat supply water outlet pipe and a heat supply water return pipe; the refrigeration water outlet end and the refrigeration water inlet end of the lithium bromide heat pump unit are respectively connected with a refrigeration water outlet pipe and a refrigeration water return pipe. The advantages are that: the lithium bromide heat pump unit and the high-efficiency heat pipe exchanger are used for recovering waste heat in the medium-temperature flue gas to perform refrigeration and heating and preheat combustion-supporting air, so that the consumption of process natural gas is reduced while the refrigeration and heating of buildings are realized, and energy and carbon are saved.
Description
Technical Field
The utility model relates to a preheat and retrieve technical field, especially relate to a medium temperature flue gas waste heat recovery manifold type refrigeration heating and air preheating system.
Background
The production and manufacture of metal material calcining enterprises need a large amount of natural gas to provide heat, the flue gas generated after the natural gas is combusted is directly discharged, and the discharged flue gas can take away a large amount of heat energy and has certain influence on the surrounding environment; enterprises are also consuming energy continuously to perform cooling, heating, and the like. If the part of waste heat is recovered, the energy required to be consumed by an enterprise is replaced to the maximum extent, so that the cost of the enterprise can be reduced, the energy consumption of the enterprise can be reduced, the emission of the enterprise can be reduced, and the contribution to the national green development and the double-carbon strategy can be made. Therefore, a medium-temperature flue gas waste heat recovery coupling type refrigerating and heating and air preheating technology is provided, heat in flue gas is recovered and utilized in a gradient mode, refrigerating and heating are provided for energy-using enterprises, meanwhile, waste heat combustion-supporting air reduces the using amount of natural gas, energy is saved, emission is reduced, and economic benefits are improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a medium temperature flue gas waste heat recovery manifold type heats and preheats air system to solve the aforementioned problem that exists among the prior art.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a medium-temperature flue gas waste heat recovery coupled type refrigeration heating and air preheating system comprises a metal material calcining kiln, a heat exchanger, a high-efficiency heat pipe heat exchanger and a lithium bromide heat pump unit; the air outlet end of the metal material calcining kiln is connected with the air inlet end of the heat exchanger through an intermediate-temperature flue gas pipeline, the air outlet end of the heat exchanger is connected with the flue gas inlet end of the high-efficiency heat pipe heat exchanger through a low-temperature flue gas pipeline, the flue gas outlet end of the high-efficiency heat pipe heat exchanger is connected with a flue gas discharge pipeline, the air inlet end of the high-efficiency heat exchanger is connected with a cold air pipeline, and the air outlet end of the high-efficiency heat exchanger is connected with the air inlet end of the metal material calcining kiln through a hot air pipeline;
the water inlet end and the water outlet end of the heat exchanger are respectively connected with the hot water outlet end and the hot water inlet end of the lithium bromide heat pump unit through a driving hot water return pipe and a driving hot water supply pipe; the heat supply water outlet end and the heat supply water inlet end of the lithium bromide heat pump unit are respectively connected with a heat supply water outlet pipe and a heat supply water return pipe; and the refrigeration water outlet end and the refrigeration water inlet end of the lithium bromide heat pump unit are respectively connected with a refrigeration water outlet pipe and a refrigeration water return pipe.
Preferably, a fan is arranged on the cold air pipeline.
Preferably, the high-efficiency heat pipe heat exchanger comprises a heat pipe condenser and a heat pipe evaporator, the low-temperature flue gas pipeline is connected with the air inlet end of the heat pipe evaporator, and the air outlet end of the heat pipe evaporator is connected with a flue gas discharge pipeline; the working medium outlet end of the heat pipe evaporator is connected with the working medium inlet end of the heat pipe condenser, and the working medium outlet end of the heat pipe condenser is connected with the working medium inlet end of the heat pipe evaporator; and the air inlet end of the heat pipe condenser is connected with a cold air pipeline, and the air outlet end of the condensed air of the heat pipe is connected with the air inlet end of the metal material calcining kiln through a hot air pipeline.
Preferably, an inlet valve of the hot water driving pump, the hot water driving pump and an outlet valve of the hot water driving pump are sequentially arranged on the hot water driving supply pipe along the flow direction of the water flow inside the hot water driving supply pipe.
Preferably, a heating water pump inlet valve, a heating water pump and a heating water pump outlet valve are sequentially arranged on the heating water outlet pipe along the flowing direction of the water flow inside the heating water outlet pipe.
Preferably, a refrigerating water pump inlet valve, a refrigerating water pump and a refrigerating water pump outlet valve are sequentially arranged on the refrigerating water outlet pipe along the flow direction of the water flow inside the refrigerating water outlet pipe.
Preferably, the lithium bromide heat pump unit comprises a lithium bromide heat pump generator, a lithium bromide heat pump evaporator and a lithium bromide heat pump condenser; the hot water outlet end and the hot water inlet end of the lithium bromide heat pump generator are respectively connected with the water inlet end and the water outlet end of the heat exchanger through a driving hot water return pipe and a driving hot water supply pipe; the refrigeration water outlet end and the refrigeration water inlet end of the lithium bromide heat pump evaporator are respectively connected with a refrigeration water outlet pipe and a refrigeration water return pipe; the heat supply water outlet end and the heat supply water inlet end of the lithium bromide heat pump condenser are respectively connected with a heat supply water outlet pipe and a heat supply water return pipe;
the lithium bromide heat pump generator, the lithium bromide heat pump evaporator and the working medium pipeline of the lithium bromide heat pump condenser are connected in series.
The utility model has the advantages that: 1. the lithium bromide heat pump unit recovers the waste heat in the flue gas to provide refrigeration and heating service for users, does not have electric energy consumed by electric heating, and greatly saves energy consumed by refrigeration and heating. 2. The high-efficiency heat pipe heat exchanger recovers the waste heat in the flue gas, preheats the combustion air before entering the furnace kiln, saves the consumption of natural gas for heating the combustion air, and reduces the energy consumption unit energy consumption and energy cost. 3. The residual waste heat generated after the energy consumption unit uses fossil energy is utilized to replace energy required to be consumed by a factory to the maximum extent, so that the energy consumption efficiency of the energy consumption unit is improved, the energy consumption intensity of the unit output value is reduced, the energy consumption of enterprises is reduced, the emission of the enterprises is reduced, the emission of carbon dioxide is reduced, and the method contributes to the national green development and the double-carbon strategy.
Drawings
Fig. 1 is a schematic structural diagram of a system according to an embodiment of the present invention.
In the figure: 1. a metal material calcining kiln; 2. a heat exchanger; 3. a high-efficiency heat pipe heat exchanger; 4. a lithium bromide heat pump unit; 5. a fan; 6. a heat pipe condenser; 7. a heat pipe evaporator; 8. a lithium bromide heat pump evaporator; 9. a lithium bromide heat pump condenser; 10. a lithium bromide heat pump generator; 11. driving a hot water pump; 12. driving an inlet valve of a hot water pump; 13. driving a hot water pump outlet valve; 14. a refrigeration water pump; 15. an outlet valve of the refrigeration water pump; 16. an inlet valve of the refrigeration water pump; 17. a heating water pump; 18. an inlet valve of the heating water pump; 19. an outlet valve of the heating water pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
As shown in fig. 1, in the present embodiment, a medium-temperature flue gas waste heat recovery coupled refrigeration heating and air preheating system is provided, which includes a metal material calcining kiln 1, a heat exchanger 2, a high-efficiency heat pipe heat exchanger 3 and a lithium bromide heat pump unit 4; the air outlet end of the metal material calcining kiln 1 is connected with the air inlet end of the heat exchanger 2 through an intermediate temperature flue gas pipeline, the air outlet end of the heat exchanger 2 is connected with the flue gas inlet end of the high-efficiency heat pipe heat exchanger 3 through a low temperature flue gas pipeline, the flue gas outlet end of the high-efficiency heat pipe heat exchanger 3 is connected with a flue gas discharge pipeline, the air inlet end of the high-efficiency heat exchanger 2 is connected with a cold air pipeline, and the air outlet end of the high-efficiency heat exchanger 2 is connected with the air inlet end of the metal material calcining kiln 1 through a hot air pipeline;
the water inlet end and the water outlet end of the heat exchanger 2 are respectively connected with the hot water outlet end and the hot water inlet end of the lithium bromide heat pump unit 4 through a driving hot water return pipe and a driving hot water supply pipe; the heat supply water outlet end and the heat supply water inlet end of the lithium bromide heat pump unit 4 are respectively connected with a heat supply water outlet pipe and a heat supply water return pipe; and the refrigeration water outlet end and the refrigeration water inlet end of the lithium bromide heat pump unit 4 are respectively connected with a refrigeration water outlet pipe and a refrigeration water return pipe.
In this embodiment, the cold air duct is provided with a fan 5. And the driving hot water supply pipe is sequentially provided with a driving hot water pump inlet valve 12, a driving hot water pump 11 and a driving hot water pump outlet valve 13 along the flow direction of the water flow in the driving hot water supply pipe. And a heating water pump inlet valve 18, a heating water pump 17 and a heating water pump outlet valve 19 are sequentially arranged on the heating water outlet pipe along the flowing direction of the water flow in the heating water outlet pipe. And a refrigerating water pump inlet valve 16, a refrigerating water pump 14 and a refrigerating water pump outlet valve 15 are sequentially arranged on the refrigerating water outlet pipe along the flow direction of the water flow in the refrigerating water outlet pipe.
In the embodiment, the system consists of three parts, namely, the middle-temperature flue gas passes through the heat exchanger 2 to heat the driving water source part, and the middle-temperature flue gas entering the heat exchanger 2 heats the driving hot water in the heat exchanger 2, so that the temperature is reduced along the driving hot water to form the low-temperature flue gas; secondly, low-temperature flue gas enters the high-efficiency heat pipe exchanger 3 to heat the cold air part, the low-temperature flue gas enters the high-efficiency heat pipe exchanger 3 to heat the cold air, and the heated air enters the metal material calcining kiln 1 to support combustion; and thirdly, a refrigerating and heating part of the lithium bromide heat pump unit 4, hot water heated in the heat exchanger 2 enters the lithium bromide heat pump unit 4 for heat exchange, and refrigerating and heating services are provided for users through the heat exchange process of the lithium bromide heat pump unit 4.
In this embodiment, the high-efficiency heat pipe heat exchanger 3 includes a heat pipe condenser 6 and a heat pipe evaporator 7, the low-temperature flue gas pipeline is connected with the gas inlet end of the heat pipe evaporator 7, and the gas outlet end of the heat pipe evaporator 7 is connected with a flue gas discharge pipeline; the working medium outlet end of the heat pipe evaporator 7 is connected with the working medium inlet end of the heat pipe condenser 6, and the working medium outlet end of the heat pipe condenser 6 is connected with the working medium inlet end of the heat pipe evaporator 7; and the air inlet end of the heat pipe condenser 6 is connected with a cold air pipeline, and the air outlet end of the heat pipe condensed air is connected with the air inlet end of the metal material calcining kiln 1 through a hot air pipeline.
In this embodiment, the lithium bromide heat pump unit 4 includes a lithium bromide heat pump generator 10, a lithium bromide heat pump evaporator 8 and a lithium bromide heat pump condenser 9; the hot water outlet end and the hot water inlet end of the lithium bromide heat pump generator 10 are respectively connected with the water inlet end and the water outlet end of the heat exchanger 2 through a driving hot water return pipe and a driving hot water supply pipe; the refrigeration water outlet end and the refrigeration water inlet end of the lithium bromide heat pump evaporator 8 are respectively connected with a refrigeration water outlet pipe and a refrigeration water return pipe; and the heat supply water outlet end and the heat supply water inlet end of the lithium bromide heat pump condenser 9 are respectively connected with a heat supply water outlet pipe and a heat supply water return pipe.
Working medium pipelines of the lithium bromide heat pump generator 10, the lithium bromide heat pump evaporator 8 and the lithium bromide heat pump condenser 9 are connected in series.
The refrigerating water outlet pipe and the refrigerating water return pipe are respectively connected with a water inlet end and a water outlet end of a cooling system of a user. The heat supply water outlet pipe and the heat supply water return pipe are respectively connected with the water inlet end and the water outlet end of a user's heating system.
In this embodiment, the specific working process of the system is as follows:
medium-temperature flue gas exhausted by the metal material calcining kiln 1 is subjected to heat exchange through the heat exchanger 2 to be discharged as low-temperature flue gas, the low-temperature flue gas enters the heat pipe evaporator 7 of the high-efficiency heat pipe heat exchanger 3, the liquid organic working medium in the heat pipe evaporator 7 absorbs and evaporates heat in the flue gas to be gaseous organic working medium, the gaseous organic working medium enters the heat pipe condenser 6, and the temperature of the flue gas is reduced and the flue gas is discharged; meanwhile, outside cold air enters a heat pipe condenser 6 of the high-efficiency heat pipe heat exchanger 3 through a fan 5, the gaseous organic working medium in the heat pipe condenser 6 releases heat to the cold air and then is condensed into liquid again to flow back to a heat pipe evaporator 7, and the cold air is heated into hot air and then enters the metal material calcining kiln 1 to support combustion.
After being heated by the medium-temperature flue gas, the driving hot water in the heat exchanger 2 enters the lithium bromide heat pump generator 10 of the lithium bromide heat pump unit 4 through the driving hot water pump 11, the driving hot water pump inlet valve 12 and the driving hot water pump outlet valve 13, and the heat in the driving hot water is absorbed by the low-temperature organic working medium in the lithium bromide heat pump generator 10 and then is cooled and returns to the heat exchanger 2 again.
The low-temperature organic working medium in the lithium bromide heat pump evaporator 8 of the lithium bromide heat pump unit 4 absorbs the heat in the refrigerating water, reduces the temperature of the refrigerating water and provides the refrigerating water for users to refrigerate in summer through the refrigerating water pump 14, the outlet valve 15 of the refrigerating water pump and the inlet valve 16 of the refrigerating water pump; the high temperature organic working medium in the lithium bromide heat pump evaporator 8 and the lithium bromide heat pump generator 10 is cooled by the lithium bromide condenser and then enters the circulation again to absorb the heat of the refrigeration water and the driving hot water respectively.
High-temperature organic working medium in a lithium bromide heat pump condenser 9 of the lithium bromide heat pump unit 4 releases heat to heat supply circulating water, and the heat supply circulating water is heated and then is supplied to a user for heating in winter through a heating water pump 17, a heating water pump inlet valve 18 and a heating water pump outlet valve 19; the high-temperature organic working medium in the lithium bromide heat pump condenser 9 is cooled and then enters the lithium bromide heat pump evaporator 8 and the lithium bromide heat pump generator 10 again to absorb heat for recycling.
Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:
the utility model provides a medium temperature flue gas waste heat recovery manifold type refrigeration heating and preheated air system, lithium bromide heat pump set retrieve the waste heat in the flue gas and for the user provides refrigeration, heating service, and the electric energy of electroless heating consumption has saved the energy that refrigeration heating consumed in a large number. The high-efficiency heat pipe heat exchanger recovers the waste heat in the flue gas, preheats the combustion air before entering the furnace kiln, saves the consumption of natural gas for heating the combustion air, and reduces the energy consumption unit energy consumption and energy cost. The residual waste heat generated after the energy consumption unit uses fossil energy is utilized to replace energy consumed by a factory to the maximum extent, the energy consumption efficiency of the energy consumption unit is improved, the energy consumption intensity of the unit output value is reduced, the energy consumption of an enterprise is reduced, the emission of the enterprise is reduced, the emission of carbon dioxide is reduced, and the method contributes to the national green development and the double-carbon strategy.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (7)
1. The utility model provides a medium temperature flue gas waste heat recovery manifold type refrigeration heating and air preheating system which characterized in that: comprises a metal material calcining kiln, a heat exchanger, a high-efficiency heat pipe heat exchanger and a lithium bromide heat pump unit; the air outlet end of the metal material calcining kiln is connected with the air inlet end of the heat exchanger through an intermediate-temperature flue gas pipeline, the air outlet end of the heat exchanger is connected with the flue gas inlet end of the high-efficiency heat pipe heat exchanger through a low-temperature flue gas pipeline, the flue gas outlet end of the high-efficiency heat pipe heat exchanger is connected with a flue gas discharge pipeline, the air inlet end of the high-efficiency heat pipe heat exchanger is connected with a cold air pipeline, and the air outlet end of the high-efficiency heat pipe heat exchanger is connected with the air inlet end of the metal material calcining kiln through a hot air pipeline;
the water inlet end and the water outlet end of the heat exchanger are respectively connected with the hot water outlet end and the hot water inlet end of the lithium bromide heat pump unit through a driving hot water return pipe and a driving hot water supply pipe; the heat supply water outlet end and the heat supply water inlet end of the lithium bromide heat pump unit are respectively connected with a heat supply water outlet pipe and a heat supply water return pipe; and the refrigeration water outlet end and the refrigeration water inlet end of the lithium bromide heat pump unit are respectively connected with a refrigeration water outlet pipe and a refrigeration water return pipe.
2. The medium-temperature flue gas waste heat recovery coupled refrigerating, heating and air preheating system of claim 1, which is characterized in that: and a fan is arranged on the cold air pipeline.
3. The medium-temperature flue gas waste heat recovery coupled type refrigerating, heating and air preheating system as claimed in claim 1, characterized in that: the high-efficiency heat pipe heat exchanger comprises a heat pipe condenser and a heat pipe evaporator, the low-temperature flue gas pipeline is connected with the air inlet end of the heat pipe evaporator, and the air outlet end of the heat pipe evaporator is connected with a flue gas discharge pipeline; the working medium outlet end of the heat pipe evaporator is connected with the working medium inlet end of the heat pipe condenser, and the working medium outlet end of the heat pipe condenser is connected with the working medium inlet end of the heat pipe evaporator; the air inlet end of the heat pipe condenser is connected with a cold air pipeline, and the air outlet end of the heat pipe condenser is connected with the air inlet end of the metal material calcining kiln through a hot air pipeline.
4. The medium-temperature flue gas waste heat recovery coupled refrigerating, heating and air preheating system of claim 1, which is characterized in that: and an inlet valve of the driving hot water pump, the driving hot water pump and an outlet valve of the driving hot water pump are sequentially arranged on the driving hot water supply pipe along the flowing direction of the internal water flow.
5. The medium-temperature flue gas waste heat recovery coupled refrigerating, heating and air preheating system of claim 1, which is characterized in that: and a heating water pump inlet valve, a heating water pump and a heating water pump outlet valve are sequentially arranged on the heating water outlet pipe along the flowing direction of the water flow inside the heating water outlet pipe.
6. The medium-temperature flue gas waste heat recovery coupled type refrigerating, heating and air preheating system as claimed in claim 1, characterized in that: and a refrigerating water pump inlet valve, a refrigerating water pump and a refrigerating water pump outlet valve are sequentially arranged on the refrigerating water outlet pipe along the flow direction of the water flow in the refrigerating water outlet pipe.
7. The medium-temperature flue gas waste heat recovery coupled refrigerating, heating and air preheating system of claim 1, which is characterized in that: the lithium bromide heat pump unit comprises a lithium bromide heat pump generator, a lithium bromide heat pump evaporator and a lithium bromide heat pump condenser; the hot water outlet end and the hot water inlet end of the lithium bromide heat pump generator are respectively connected with the water inlet end and the water outlet end of the heat exchanger through a driving hot water return pipe and a driving hot water supply pipe; the refrigeration water outlet end and the refrigeration water inlet end of the lithium bromide heat pump evaporator are respectively connected with a refrigeration water outlet pipe and a refrigeration water return pipe; the heat supply water outlet end and the heat supply water inlet end of the lithium bromide heat pump condenser are respectively connected with a heat supply water outlet pipe and a heat supply water return pipe;
the lithium bromide heat pump generator, the lithium bromide heat pump evaporator and the working medium pipeline of the lithium bromide heat pump condenser are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223362403.XU CN218884697U (en) | 2022-12-13 | 2022-12-13 | Medium-temperature flue gas waste heat recovery coupled type refrigerating and heating and air preheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223362403.XU CN218884697U (en) | 2022-12-13 | 2022-12-13 | Medium-temperature flue gas waste heat recovery coupled type refrigerating and heating and air preheating system |
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| Publication Number | Publication Date |
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| CN218884697U true CN218884697U (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223362403.XU Active CN218884697U (en) | 2022-12-13 | 2022-12-13 | Medium-temperature flue gas waste heat recovery coupled type refrigerating and heating and air preheating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218884697U (en) |
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2022
- 2022-12-13 CN CN202223362403.XU patent/CN218884697U/en active Active
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