CN217110521U - Low-temperature waste heat recovery device - Google Patents
Low-temperature waste heat recovery device Download PDFInfo
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- CN217110521U CN217110521U CN202220696930.5U CN202220696930U CN217110521U CN 217110521 U CN217110521 U CN 217110521U CN 202220696930 U CN202220696930 U CN 202220696930U CN 217110521 U CN217110521 U CN 217110521U
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Abstract
The utility model provides a low temperature waste heat recovery device, including the one-level heat exchanger, second grade heat exchanger, holding water box, the user side that are equipped with, the outlet flue of heating furnace links to each other through first hot gas pipeline and one-level heat exchanger's hot gas import, one-level heat exchanger's air conditioning export links to each other with first air conditioning pipeline, one-level heat exchanger's hot water export link to each other with first hot water pipeline, one-level heat exchanger's cold water import link to each other with first cold water pipeline, second grade heat exchanger's hot gas import link to each other with second hot gas pipeline, second grade heat exchanger's air conditioning export links to each other with second air conditioning pipeline. The utility model has the advantages that: in the first-stage heat exchanger.
Description
Technical Field
The utility model belongs to the technical field of waste heat recovery utilizes device, especially, be fit for a low temperature waste heat recovery device.
Background
In the metallurgical industry, furnaces are devices that heat a material or a metal workpiece to a rolling-to-forging temperature. The application of the heating furnace is in various fields of petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, pharmacy and the like. In industrial production, after the flue gas that produces in the heating furnace use is through waste heat recovery, the heat of collecting is stored in holding water tank for daily use, but at present the flue gas still can persist the residual heat after once through heat exchanger, directly discharges from the chimney like this, causes the energy recovery insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low temperature waste heat recovery device can fully retrieve according to actual conditions and remain the heat for the energy obtains make full use of, is particularly suitable for being used in the flue gas heat recovery of heating furnace.
The technical scheme of the utility model is that: a low-temperature waste heat recovery device, which comprises a primary heat exchanger, a secondary heat exchanger, a heat-preservation water tank and a user side,
the smoke outlet of the heating furnace is connected with the hot gas inlet of the primary heat exchanger through a first hot gas pipeline, the cold gas outlet of the primary heat exchanger is connected with a first cold gas pipeline,
the hot water outlet of the primary heat exchanger is connected with a first hot water pipeline, the cold water inlet of the primary heat exchanger is connected with a first cold water pipeline,
the hot gas inlet of the secondary heat exchanger is connected with a second hot gas pipeline, the cold gas outlet of the secondary heat exchanger is connected with a second cold gas pipeline, the hot water outlet of the secondary heat exchanger is connected with a second hot water pipeline, the cold water inlet of the secondary heat exchanger is connected with a second cold water pipeline,
the first cold air pipeline is respectively communicated with an air outlet pipe and a second hot air pipeline through a cold air three-way valve, the air outlet pipe is communicated with a chimney, the first hot water pipeline is respectively connected with a second hot water pipeline and a hot water outlet pipe through a hot water three-way valve, the hot water outlet pipe is connected with an inlet of a heat preservation water tank, the second cold air pipeline is communicated with the chimney,
the cold water outlet of the heat preservation water tank is connected with a third cold water pipeline, the third cold water pipeline is respectively communicated with the first cold water pipeline and the second cold water pipeline through an auxiliary three-way valve, the water outlet of the heat preservation water tank is communicated with a user side, and a pump and a switch valve are arranged at the connection position.
Preferably, the cold water outlet of the heat preservation water tank is arranged at the lower end of the heat preservation water tank.
Preferably, the inlet of the heat preservation water tank is arranged at the upper end of the heat preservation water tank.
Preferably, each hot water pipeline and each cold water pipeline are provided with a pump, and each hot air pipeline and each cold air pipeline are provided with an exhaust fan.
The utility model has the advantages and positive effects that: due to the adoption of the technical scheme, under the action of the primary heat exchanger and the secondary heat exchanger, the number of the heat exchangers can be switched, and the flue gas waste heat can be conveniently and fully recovered.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure:
1. first-stage heat exchanger 2, second-stage heat exchanger 3 and heat-insulating water tank
4. User end 5, heating furnace 6 and first hot gas pipeline
7. A first cold air pipeline 8, a first hot water pipeline 9 and a first cold water pipeline
10. A second hot gas pipeline 11, a second cold gas pipeline 12 and a second hot water pipeline
13. Second cold water pipeline 14, air outlet pipe 15 and chimney
16. A hot water outlet pipe 17 and a third cold water pipeline.
Detailed Description
As shown in figure 1, the technical scheme of the utility model is a low-temperature waste heat recovery device, which comprises a primary heat exchanger 1, a secondary heat exchanger 2, a heat-preservation water tank 3 and a user end 4,
the smoke outlet of the heating furnace 5 is connected with the hot gas inlet of the primary heat exchanger 1 through a first hot gas pipeline 6, the cold gas outlet of the primary heat exchanger 1 is connected with a first cold gas pipeline 7,
the hot water outlet of the primary heat exchanger 1 is connected with a first hot water pipeline 8, the cold water inlet of the primary heat exchanger 1 is connected with a first cold water pipeline 9,
the hot gas inlet of the secondary heat exchanger 2 is connected with a second hot gas pipeline 10, the cold gas outlet of the secondary heat exchanger 2 is connected with a second cold gas pipeline 11, the hot water outlet of the secondary heat exchanger 2 is connected with a second hot water pipeline 12, the cold water inlet of the secondary heat exchanger 2 is connected with a second cold water pipeline 13,
the first cold air pipeline 7 is respectively communicated with an air outlet pipe 14 and a second hot air pipeline 10 through a cold air three-way valve, the air outlet pipe 14 is communicated with a chimney 15, the first hot water pipeline 8 is respectively connected with a second hot water pipeline 12 and a hot water outlet pipe 16 through a hot water three-way valve, the hot water outlet pipe 16 is connected with an inlet of the heat preservation water tank 3, the second cold air pipeline 11 is communicated with the chimney 15,
the cold water outlet of the heat preservation water tank 3 is connected with a third cold water pipeline 17, the third cold water pipeline 17 is respectively communicated with the first cold water pipeline 9 and the second cold water pipeline 13 through an auxiliary three-way valve, the water outlet of the heat preservation water tank 3 is communicated with the user terminal 4, and a pump and a switch valve are arranged at the connection position.
In this embodiment, the cold water outlet of the thermal insulation water tank 3 is arranged at the lower end of the thermal insulation water tank 3.
In this embodiment, the inlet of the heat-insulating water tank 3 is arranged at the upper end of the heat-insulating water tank 3.
In this embodiment, all be equipped with the pump on every hot water pipeline, the cold water pipeline, every hot gas pipeline, cold air pipeline all are equipped with the air exhauster.
The working process and principle of the example are as follows: when the primary heat exchanger 1 works, smoke of the heating furnace 5 enters the primary heat exchanger 1 through the first hot gas pipeline 6, then cold air after heat exchange is discharged into the chimney 5 from the first cold air pipeline 7 and the air outlet pipe 14, and hot water after heat exchange from the primary heat exchanger 1 enters the heat preservation water tank 3 along the first hot water pipeline 8, the hot water three-way valve and the hot water outlet pipe 16; cold water in the heat preservation water tank 3 flows into the first cold water pipeline 9 along the third cold water pipeline 17, and the water in the heat preservation water tank is circularly heated;
when the two heat exchangers work together, the hot water three-way valve and the cold air three-way valve are adjusted in advance, the flue gas of the heating furnace 5 enters the primary heat exchanger 1 through the first hot gas pipeline 6, then the flue gas after heat exchange enters the secondary heat exchanger 2 along the first cold air pipeline 7 and the second hot air pipeline 10, then the flue gas after heat exchange is discharged from a second cold air pipeline 11 of the secondary heat exchanger 2 to a chimney, meanwhile, hot water exchanged heat from the primary heat exchanger 1 enters the heat-preservation water tank along the first hot water pipeline 8 and the hot water outlet pipe 16, and the hot water after the heat exchange of the secondary heat exchanger 2 enters the heat preservation water tank 3 along the second hot water pipeline 12 and the hot water outlet pipe 16, and the cold water enters the primary heat exchanger 1 and the secondary heat exchanger 1 sequentially through the first cold water pipeline 9 and the second cold water pipeline 13 along the third cold water pipeline 17 of the heat preservation water tank 3.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (4)
1. The utility model provides a low temperature waste heat recovery device which characterized in that: comprises a primary heat exchanger, a secondary heat exchanger, a heat preservation water tank and a user end,
the smoke outlet of the heating furnace is connected with the hot gas inlet of the primary heat exchanger through a first hot gas pipeline, the cold gas outlet of the primary heat exchanger is connected with a first cold gas pipeline,
the hot water outlet of the primary heat exchanger is connected with a first hot water pipeline, the cold water inlet of the primary heat exchanger is connected with a first cold water pipeline,
the hot gas inlet of the secondary heat exchanger is connected with a second hot gas pipeline, the cold gas outlet of the secondary heat exchanger is connected with a second cold gas pipeline, the hot water outlet of the secondary heat exchanger is connected with a second hot water pipeline, the cold water inlet of the secondary heat exchanger is connected with a second cold water pipeline,
the first cold air pipeline is respectively communicated with an air outlet pipe and a second hot air pipeline through a cold air three-way valve, the air outlet pipe is communicated with a chimney, the first hot water pipeline is respectively connected with a second hot water pipeline and a hot water outlet pipe through a hot water three-way valve, the hot water outlet pipe is connected with an inlet of a heat preservation water tank, the second cold air pipeline is communicated with the chimney,
the cold water outlet of the heat preservation water tank is connected with a third cold water pipeline, the third cold water pipeline is respectively communicated with the first cold water pipeline and the second cold water pipeline through an auxiliary three-way valve, the water outlet of the heat preservation water tank is communicated with a user side, and a pump and a switch valve are arranged at the joint of the heat preservation water tank and the user side.
2. The low-temperature waste heat recovery device according to claim 1, wherein: and a cold water outlet of the heat preservation water tank is arranged at the lower end of the heat preservation water tank.
3. The low-temperature waste heat recovery device according to claim 1, wherein: the inlet of the heat preservation water tank is arranged at the upper end of the heat preservation water tank.
4. The low-temperature waste heat recovery device according to claim 1, wherein: each hot water pipeline and each cold water pipeline are respectively provided with a pump, and each hot air pipeline and each cold air pipeline are respectively provided with an exhaust fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696930.5U CN217110521U (en) | 2022-03-29 | 2022-03-29 | Low-temperature waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220696930.5U CN217110521U (en) | 2022-03-29 | 2022-03-29 | Low-temperature waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217110521U true CN217110521U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220696930.5U Active CN217110521U (en) | 2022-03-29 | 2022-03-29 | Low-temperature waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217110521U (en) |
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2022
- 2022-03-29 CN CN202220696930.5U patent/CN217110521U/en active Active
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