CN211600853U - Vacuum negative pressure heating system - Google Patents
Vacuum negative pressure heating system Download PDFInfo
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- CN211600853U CN211600853U CN201922004980.3U CN201922004980U CN211600853U CN 211600853 U CN211600853 U CN 211600853U CN 201922004980 U CN201922004980 U CN 201922004980U CN 211600853 U CN211600853 U CN 211600853U
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Abstract
The utility model discloses a vacuum negative pressure heat supply system, which comprises a vacuum tank body, wherein liquid is arranged in the vacuum tank body, a vacuumizing port is arranged on the vacuum tank body above the liquid, and the vacuumizing port is connected with a vacuumizing assembly to vacuumize the vacuum tank body; a heating pipeline immersed in the liquid is arranged in the vacuum tank body, the inlet of the heating pipeline is connected with the outlet of a steam compressor, and the inlet of the steam compressor is connected with the waste hot water vapor through a pipeline; the outlet of the heating pipeline is connected with the fresh air heat exchanger; the vacuum tank body is also connected with a heat exchanger through a pipeline. The heat of the waste hot water vapor heats the liquid in the vacuum tank body, so that the liquid is boiled to generate high-temperature steam, the heat exchange of the high-temperature steam in the heat exchanger is facilitated, and the operations of heating, drying and the like are realized; meanwhile, the vacuumized waste gas enters the fresh air heat exchanger, and the waste hot water steam and the returned waste hot water steam heat the fresh air entering the fresh air heat exchanger, so that energy recovery is realized.
Description
Technical Field
The utility model relates to a waste heat recovery field especially relates to a vacuum negative pressure heating system.
Background
The waste gas that industry enterprise discharged at present has high-temperature gas, and wherein contain a large amount of heat energy, directly discharges the atmosphere, can cause the energy waste on the one hand, and on the other hand causes environmental pollution.
In the prior art, a waste heat boiler is generally adopted to recover gas waste heat, the waste heat boiler is built by refractory bricks to form a hearth, a tube bundle is arranged in the hearth, high-temperature gas passes through the hearth to heat and vaporize water flowing in the tube bundle, but the temperature of steam generated in the tube bundle is low, so that a superheater is also required to be arranged in the waste heat boiler, the steam generated in the tube bundle is further heated to generate superheated steam, and the superheated steam is utilized to perform heating, drying and other operations. The overall waste heat recovery efficiency is low.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model aims to provide a vacuum negative pressure heat supply system, which adopts the vacuum negative pressure to replace the boiler to recover the gas waste heat and improves the waste heat recovery efficiency.
In order to achieve the above purpose, the utility model discloses a technical scheme is: a vacuum negative pressure heat supply system comprises a vacuum tank body, wherein liquid is arranged in the vacuum tank body, a vacuumizing port is arranged on the vacuum tank body above the liquid, and the vacuumizing port is connected with a vacuumizing assembly to vacuumize the vacuum tank body; a heating pipeline immersed in liquid is arranged in the vacuum tank body, an inlet of the heating pipeline extends to the outside of the vacuum tank body and is connected with an outlet of a steam compressor, and an inlet of the steam compressor is connected with waste hot water vapor through a pipeline; an outlet of the heating pipeline extends to the outside of the vacuum tank body and is connected with a fresh air heat exchanger; the vacuum tank body is also connected with a heat exchanger through a pipeline, wherein a steam inlet which enters the heat exchanger is arranged on the vacuum tank body above the liquid.
Further, a first liquid level meter and a second liquid level meter for monitoring the liquid level are arranged on the vacuum tank body; the steam inlet and the vacuumizing port are both positioned above the first liquid level meter. Wherein the height of the evacuation port should not be less than the height of the steam inlet (the height of the evacuation port should be greater than or equal to the height of the steam inlet). In order to avoid negative pressure state, the foam generated by liquid boiling enters the steam inlet, a water baffle is arranged at the steam inlet, and the water baffle is fixed in the vacuum tank body through a bracket.
Further, a thermometer for monitoring the temperature of the liquid is arranged on the vacuum tank body.
Further, the bottom of the vacuum tank body is provided with a drain outlet, and a butterfly valve is arranged at the drain outlet.
Further, the vacuum tank body is of a double-layer structure, namely the vacuum tank body is provided with an inner-layer outer shell and an outer-layer inner shell, and an interlayer is arranged between the inner-layer outer shell and the outer-layer inner shell; the vacuum assembly comprises a first pipeline and a second pipeline which are distributed side by side, one end of the first pipeline is in conduction connection with an inner cavity of the vacuum tank body, one end of the second pipeline is in conduction connection with an interlayer of the vacuum tank body, and the other end of the first pipeline and the other end of the second pipeline are gathered and then connected with the fresh air heat exchanger; and a first vacuum pump is arranged on the first pipeline, and a second vacuum pump is arranged on the second pipeline.
Further, a first vacuum meter and a first vacuum butterfly valve are sequentially arranged on the first pipeline, and gas in the vacuum tank body sequentially passes through the first vacuum meter, the first vacuum butterfly valve and the first vacuum pump to enter the fresh air heat exchanger.
Further, a second vacuum meter and a second vacuum butterfly valve are sequentially arranged on the second pipeline, and gas in the interlayer of the vacuum tank body sequentially passes through the second vacuum meter, the second vacuum butterfly valve and the second vacuum pump to enter the fresh air heat exchanger.
The vacuum negative pressure heat supply system utilizes the characteristic that water boils at low temperature under the condition of low pressure, liquid (heat medium water) filled in a vacuum tank body is heated by waste hot water vapor or other heating modes, so that the heat medium water boils at low temperature, high-temperature water vapor is evaporated, and the high-temperature water vapor circularly flows back into the vacuum tank body after passing through a heat exchanger. Heat exchange is performed in the heat exchanger to heat and dry the article.
Compared with the prior art, the heat of the waste hot water vapor heats the liquid in the vacuum tank body, so that the liquid is boiled to generate high-temperature steam, the heat exchange of the high-temperature steam in the heat exchanger is facilitated, and the operations of heating, drying and the like of the object are realized; meanwhile, the vacuumized waste gas enters the fresh air heat exchanger, and the waste hot water steam and the returned waste hot water steam heat the fresh air entering the fresh air heat exchanger, so that energy recovery is realized.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Examples
Referring to fig. 1, the vacuum negative pressure heat supply system in this embodiment includes a vacuum tank, a liquid is disposed in the vacuum tank 1, and vacuum ports 2a and 2b are disposed on the vacuum tank 1 above the liquid, and the vacuum ports are connected to a vacuum pumping assembly to pump vacuum in the vacuum tank. A heating pipeline 3 immersed in the liquid is arranged in the vacuum tank body 1, an inlet of the heating pipeline 3 extends to the outside of the vacuum tank body 1 and is connected with an outlet of a steam compressor 5, and an inlet of the steam compressor 5 is connected with the waste hot water steam through a pipeline; the outlet of the heating pipeline 3 extends to the outside of the vacuum tank body 1 and is connected with a fresh air heat exchanger 6; the vacuum tank body 1 is also connected with a heat exchanger 7 through a pipeline, wherein a steam inlet 2c entering the heat exchanger 7 is arranged on the vacuum tank body 1 above the liquid.
In the embodiment, in order to prevent liquid from flowing into other equipment after the liquid is boiled, a first liquid level meter 8a and a second liquid level meter 8b for monitoring the liquid level are arranged on the vacuum tank body 1; the steam inlet 2c and the evacuation ports 2a, 2b are both located above the first level gauge 8 a. Wherein the height of the evacuation ports 2a, 2b should not be lower than the height of the steam inlet 2c (the height of the evacuation ports should be higher than or equal to the height of the steam inlet). In order to avoid the negative pressure state, the foam generated by the boiling of the liquid enters the steam inlet 2c, a water baffle is arranged at the steam inlet 2c, and the water baffle is fixed in the vacuum tank body through a bracket. And a thermometer 8c for monitoring the temperature of the liquid is also arranged on the vacuum tank body 1.
In this embodiment the bottom of the vacuum tank 1 is provided with a drain port 2d, and a butterfly valve 9 is arranged at the drain port 2 d. When not in use, the butterfly valve 9 can be manually opened to discharge the liquid in the vacuum tank body.
In this embodiment, the vacuum tank 1 has a double-layer structure, that is, the vacuum tank 1 has an inner outer shell and an outer inner shell, and an interlayer is formed between the inner outer shell and the outer inner shell.
In this embodiment, the vacuum assembly includes a first pipeline 100 and a second pipeline 110 which are distributed side by side, one end of the first pipeline 100 is in conduction connection with an inner cavity of the vacuum tank 1, one end of the second pipeline is in conduction connection with an interlayer of the vacuum tank, and the other end of the first pipeline 100 and the other end of the second pipeline 110 are gathered and then connected with the fresh air heat exchanger 6; a first vacuum pump 101 is arranged on the first pipeline 100, and a second vacuum pump 111 is arranged on the second pipeline 110. The first pipeline is sequentially provided with a first vacuum meter 102 and a first vacuum butterfly valve 103, and gas in the vacuum tank body 1 sequentially passes through the first vacuum meter 102, the first vacuum butterfly valve 103 and the first vacuum pump 101 to enter the fresh air heat exchanger 6. The second pipeline 110 is sequentially provided with a second vacuum meter 112 and a second vacuum butterfly valve 113, and gas in the interlayer of the vacuum tank body 1 sequentially passes through the second vacuum meter 112, the second vacuum butterfly valve 113 and the second vacuum pump 111 to enter the fresh air heat exchanger 6, so that the interlayer vacuum effect of the vacuum tank body 1 is achieved.
When the vacuum valve is used, the second vacuum butterfly valve 113 is opened, the second vacuum pump 111 is started, and when the pressure value on the second vacuum meter 112 reaches the preset value, the second vacuum butterfly valve 113 and the second vacuum pump 111 are automatically closed. Then, the first vacuum butterfly valve 103 is opened, the first vacuum pump 101 is started, and when the pressure value on the first vacuum gauge 102 reaches a preset value, the first vacuum butterfly valve 103 and the first vacuum pump 101 are automatically closed. Then waste hot water vapor is introduced, a vapor compressor is started to increase the pressure and the temperature of the introduced waste hot water vapor, and the waste hot water vapor enters the vacuum tank body along the heating pipeline 3 to heat the liquid. The liquid (heat medium water) filled in the vacuum tank body is heated by waste hot water vapor or other heating modes by utilizing the characteristic that water boils at low temperature under the condition of low pressure, so that the heat medium water boils at low temperature, high-temperature water vapor is evaporated, and the high-temperature water vapor passes through the heat exchanger and then circularly flows back into the vacuum tank body. Heat exchange is performed in the heat exchanger to heat and dry the article.
The heat of the waste hot water vapor heats the liquid in the vacuum tank body, so that the liquid is boiled to generate high-temperature steam, the heat exchange of the high-temperature steam in the heat exchanger is facilitated, and the operations of heating, drying and the like are realized; meanwhile, the vacuumized waste gas enters the fresh air heat exchanger, and the waste hot water steam and the returned waste hot water steam heat the fresh air entering the fresh air heat exchanger, so that energy recovery is realized.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (7)
1. The utility model provides a vacuum negative pressure heating system which characterized in that: the vacuum tank comprises a vacuum tank body, wherein liquid is arranged in the vacuum tank body, a vacuumizing port is arranged on the vacuum tank body above the liquid, and the vacuumizing port is connected with a vacuumizing assembly to vacuumize the vacuum tank body; a heating pipeline immersed in liquid is arranged in the vacuum tank body, an inlet of the heating pipeline extends to the outside of the vacuum tank body and is connected with an outlet of a steam compressor, and an inlet of the steam compressor is connected with waste hot water vapor through a pipeline; an outlet of the heating pipeline extends to the outside of the vacuum tank body and is connected with a fresh air heat exchanger; the vacuum tank body is also connected with a heat exchanger through a pipeline, wherein a steam inlet which enters the heat exchanger is arranged on the vacuum tank body above the liquid.
2. A vacuum negative pressure heating system according to claim 1, wherein: a first liquid level meter and a second liquid level meter for monitoring the liquid level are arranged on the vacuum tank body; the steam inlet and the vacuumizing port are both positioned above the first liquid level meter.
3. A vacuum negative pressure heating system according to claim 2, wherein: and a thermometer for monitoring the temperature of the liquid is also arranged on the vacuum tank body.
4. A vacuum negative pressure heating system according to claim 1, wherein: the bottom of the vacuum tank body is provided with a drain outlet, and a butterfly valve is arranged at the drain outlet.
5. A vacuum negative pressure heating system according to claim 1, wherein: the vacuum tank body is of a double-layer structure; the vacuum assembly comprises a first pipeline and a second pipeline which are distributed side by side, one end of the first pipeline is in conduction connection with an inner cavity of the vacuum tank body, one end of the second pipeline is in conduction connection with an interlayer of the vacuum tank body, and the other end of the first pipeline and the other end of the second pipeline are gathered and then connected with the fresh air heat exchanger; and a first vacuum pump is arranged on the first pipeline, and a second vacuum pump is arranged on the second pipeline.
6. A vacuum negative pressure heating system according to claim 5, wherein: the first pipeline is sequentially provided with a first vacuum meter and a first vacuum butterfly valve, and gas in the vacuum tank sequentially passes through the first vacuum meter, the first vacuum butterfly valve and the first vacuum pump to enter the fresh air heat exchanger.
7. A vacuum negative pressure heating system according to claim 5, wherein: the second pipeline is sequentially provided with a second vacuum meter and a second vacuum butterfly valve, and gas in the interlayer of the vacuum tank body sequentially passes through the second vacuum meter, the second vacuum butterfly valve and the second vacuum pump to enter the fresh air heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922004980.3U CN211600853U (en) | 2019-11-19 | 2019-11-19 | Vacuum negative pressure heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922004980.3U CN211600853U (en) | 2019-11-19 | 2019-11-19 | Vacuum negative pressure heating system |
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| Publication Number | Publication Date |
|---|---|
| CN211600853U true CN211600853U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922004980.3U Active CN211600853U (en) | 2019-11-19 | 2019-11-19 | Vacuum negative pressure heating system |
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| CN (1) | CN211600853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110864346A (en) * | 2019-11-19 | 2020-03-06 | 苏州乐宏环保科技有限公司 | Vacuum negative pressure heating system |
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2019
- 2019-11-19 CN CN201922004980.3U patent/CN211600853U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110864346A (en) * | 2019-11-19 | 2020-03-06 | 苏州乐宏环保科技有限公司 | Vacuum negative pressure heating system |
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