CN211552240U - Waste heat recovery device of vacuum freeze drying heating system - Google Patents
Waste heat recovery device of vacuum freeze drying heating system Download PDFInfo
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- CN211552240U CN211552240U CN202021585133.7U CN202021585133U CN211552240U CN 211552240 U CN211552240 U CN 211552240U CN 202021585133 U CN202021585133 U CN 202021585133U CN 211552240 U CN211552240 U CN 211552240U
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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
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- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model provides a waste heat recovery device of vacuum freeze drying heating system, belongs to vacuum freeze drying heating system device field, and heating tank outlet pipeline links first mouthful of first three-way control valve. The second port of the first three-way regulating valve is connected with the heating plate through a hot water circulating pump pipeline for supplying water. The heating plate water outlet pipeline is connected with a first port of a second three-way regulating valve, and a second control valve is arranged on the pipeline. The two sides of the second control valve are provided with a communicating pipeline, and a first control valve is arranged on the communicating pipeline. The communicating pipeline passes through the heat recovery heat exchanger. The heat recovery heat exchanger is internally provided with a steam pipeline which is connected with the outlet of the compressor and the inlet of the evaporative condenser. The second port pipeline of the second three-way regulating valve is connected with the third port of the first three-way regulating valve. And a third port pipeline of the second three-way regulating valve is connected back to one side of the second control valve and penetrates through the cooling heat exchanger. And a pipeline between a third port pipeline of the second three-way regulating valve and the second control valve is connected to the back heating tank. Part of heat in the hot fluorine (ammonia) gas can be recovered to supplement the heating system, and the temperature reduction treatment of the hot fluorine (ammonia) gas can be reduced.
Description
Technical Field
The utility model belongs to vacuum freeze drying heating system device field, in particular to vacuum freeze drying heating system's waste heat recovery device.
Background
The temperature of hot fluorine (ammonia) gas discharged from the outlet of a compressor in the existing refrigerating system is about 90 ℃, and the hot fluorine (ammonia) gas can be continuously used only by temperature reduction treatment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a vacuum freeze drying heating system's waste heat recovery device can retrieve the heat in some hot fluorine (ammonia) gas, supplements into heating system.
The technical scheme is as follows:
a waste heat recovery device of a vacuum freeze drying heating system comprises a heating tank, a heating circulating pump, a cooling tower, a cooling heat exchanger, a heat recovery heat exchanger and a heating plate.
The technical key points are as follows:
the first water inlet pipeline of the heating tank is connected with the water outlet of the heat exchanger.
The second water inlet of the heating tank is connected with the water inlet of the heat exchanger through a heating circulating pump.
The heating tank water outlet pipeline is connected with a first port of the first three-way regulating valve.
The second port of the first three-way regulating valve is connected with the water inlet of the heating plate through a hot water circulating pump pipeline.
The water outlet pipeline of the heating plate is connected with a first port of a second three-way regulating valve, and a second control valve is arranged on the pipeline.
A communicating pipeline is arranged between the points B and C on the two sides of the second control valve, and a first control valve is arranged on the communicating pipeline.
And the point B is positioned on one side of the second three-way regulating valve.
Point C is located on one side of the heating plate.
The communicating pipeline passes through the heat recovery heat exchanger.
A steam pipeline is arranged in the heat recovery heat exchanger, one end of the steam pipeline is connected with an outlet pipeline of the compressor, and the other end of the steam pipeline is connected with an inlet pipeline of the evaporative condenser.
And a second port pipeline of the second three-way regulating valve is connected with a third port of the first three-way regulating valve.
The third port of the second three-way regulating valve is connected to a pipeline A point between the first port of the second three-way regulating valve and the second control valve.
The point A is positioned at one side of the second three-way regulating valve.
And the point B is positioned on one side of the second control valve.
And a third port pipeline of the second three-way regulating valve penetrates through the cooling heat exchanger.
The pipeline in the cooling heat exchanger is connected with the cooling tower and circulates through the cooling circulating pump.
And a pipeline between the point A and the point B is connected to a second water inlet connected with the heating tank through a pipeline.
The heating plates can be two groups.
The advantages are that:
the waste heat recovery device can recover heat in a part of hot fluorine (ammonia) gas, supplement the heat into a heating system and reduce the work of temperature reduction treatment of the hot fluorine (ammonia) gas.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Fig. 2 is an enlarged view of an upper portion of fig. 1.
The system comprises a steam inlet 13, a steam outlet 14, an evaporative condenser inlet pipeline 15, a compressor outlet pipeline 16, a third port pipeline 17 of a second three-way regulating valve, a cooling circulating pump 18, a heating plate temperature sensor 19, a heating tank temperature sensor 20 and a communication pipeline 21.
Detailed Description
The utility model provides a waste heat recovery device of vacuum freeze drying heating system, includes heating tank 1, heating circulating pump 2, cooling tower 3, cooling heat exchanger 6, heat recovery heat exchanger 12 and hot plate 7.
The heating tank 1 is supplied with heat by a heat exchanger 4.
The heat exchanger 4 is a steam heat exchanger and has a steam inlet 13 and a steam outlet 14.
The first water inlet pipeline on the right side of the heating tank 1 is connected with the water outlet of the heat exchanger 4.
A second water inlet below the heating tank 1 is connected with a water inlet of the heat exchanger 4 through a heating circulating pump 2. The outlet of the warming circulating pump 2 is connected with the water inlet of the heat exchanger 4.
The left water outlet pipeline of the heating tank 1 is connected with a first port (a right port on the figure) of a first three-way regulating valve 8.
The second port (the left port in the figure) of the first three-way regulating valve 8 is respectively connected with the water inlets of the two groups of heating plates 7 at the two sides through pipelines of the hot water circulating pump 5.
The water outlet pipelines of the heating plates 7 at two sides are combined and then connected with a first port (a lower port on the figure) of a second three-way regulating valve 9, and a second control valve 11 is arranged on the combined pipeline.
A communication pipeline 21 is arranged between points B and C on two sides of the second control valve 11, and a first control valve 10 is arranged on the communication pipeline 21.
Point B is located on the side of the second three-way regulating valve 9.
The point C is positioned at one side of the heating plate 7, and the water outlet pipeline of the heating plate 7 is merged.
The communication line 21 passes through the heat recovery heat exchanger 12.
The heat recovery heat exchanger 12 is provided with a steam pipeline, one end of which is connected with a compressor outlet pipeline 16 (hot fluorine or hot ammonia steam inlet) of the refrigeration system, and the other end of which is connected with an evaporative condenser inlet pipeline 15 (hot fluorine or hot ammonia steam outlet) of the refrigeration system.
A second port (an upper port in the figure) of the second three-way regulating valve 9 is connected with a third port (a lower port in the figure) of the first three-way regulating valve 8 through a pipeline.
A second three-way regulating valve third port (right port in the figure) line 17 is connected to a line a point between the first port of the second three-way regulating valve 9 and the second control valve 11.
The point a is located on the side of the second three-way regulating valve 9.
Point B is located on the side of the second control valve 11.
The third port pipeline 17 of the second three-way regulating valve passes through the cooling heat exchanger 6.
The pipeline in the cooling heat exchanger 6 is connected with the cooling tower 3 and is driven to circulate by a cooling circulating pump 18.
The pipeline between the points A and B (the point D between the second control valve 11 and the third port pipeline 17 of the second three-way regulating valve) is connected to a second water inlet below the heating tank 1.
The outlet pipeline of the hot water circulating pump 5 is provided with a heating plate temperature sensor 19 at the water inlet of the heating plate 7.
The heating tank 1 is provided with a heating tank temperature sensor 20.
The working principle is as follows:
deionized water in the hot water tank 1 is conveyed through the heating circulating pump 2 and is subjected to heat exchange through the heat exchanger 4, water in the heating tank 1 is heated, and a heat source is provided for the whole heating system.
Hot water circulating pump 5 will heat 1 hot water transport heating plate 7 of jar, and the regulation through first three-way governing valve 8 and second three-way governing valve 9 guarantees that heating plate 7 temperature moves according to the curve of setting for vacuum freeze-drying's material provides the required heat of sublimation.
The cooling circulation pump 18 allows cooling water to run between the cooling tower 3 and the cooling heat exchanger 6, as required to ensure cooling of the heating plate 7.
In order to utilize the heat of hot fluorine (ammonia) gas to be cooled at the temperature of 80-90 ℃ at the air outlet of the refrigeration compressor, a heat recovery heat exchanger 12 is additionally arranged on the water return side of a heating plate 7 of hot water circulation and is controlled by controlling a first control valve 10 and a second control valve 11.
When the heating temperature curve of the heating plate 7 needs to be 70 ℃ or above, the first control valve 10 is closed, the second control valve 11 is opened, and the heating system operates normally.
When the heating temperature curve of the heating plate 7 needs to be below 70 ℃, the first control valve 10 is opened, the second control valve 11 is closed, the return water runs in the heat recovery heat exchanger 12, part of heat is supplemented, the steam consumption is reduced, and the energy is saved. Meanwhile, the hot fluorine (ammonia) gas runs in the heat recovery heat exchanger 12, so that the temperature is reduced, the load of an evaporative condenser in a refrigeration system is reduced, and energy is saved.
The method specifically comprises the following steps:
the heating circulating pump 2 pumps water in the heating tank 1 from the lower part of the heating tank 1 and flows back from a right side port (water inlet) of the heating tank 1 through the steam heat exchanger 4. The warming circulation pump 2 is operated and stopped, and the inflow of steam is controlled by the set temperature of the heating tank 1.
While the cooling circulation pump 18 is always operated to circulate the cooling water between the cooling tower and the cooling heat exchanger. The cooling circulation pump is operated all the time to circulate the cooling water between the cooling tower 3 and the cooling heat exchanger 6.
Normal operating conditions (at 70 ℃ and above for the heating plate 7):
at this time, the first control valve 10 is closed, the second control valve 11 is opened, and water does not flow through the heat recovery heat exchanger 12.
At this time, the right side port and the lower side port of the second three-way regulating valve 9 are opened and merged according to different proportions, then flow into the upper port of the second three-way regulating valve 9, and then flow into the lower port of the first three-way regulating valve 8.
The working state of waste heat recovery: (the heating plate 7 is now set at a temperature of less than 70 ℃ C.).
The right side mouth and the lower side mouth of first three way control valve 8 are according to the requirement of hot plate 7 board temperature, open different proportion confluence after and flow into the hot plate through hot water circulating pump 5 by the left side mouth of first three way control valve 8.
At this time, the first control valve 10 is opened, the second control valve 11 is closed, and water flows through the heat recovery heat exchanger 12.
At this time, the right side port and the lower side port of the second three-way regulating valve 9 are opened and merged according to different proportions, then flow into the upper port of the second three-way regulating valve 9, and then flow into the lower port of the first three-way regulating valve 8.
And (3) cooling state:
the right port of the first three-way regulating valve 8 is closed (hot water supply is stopped), and water flows into the left port of the first three-way regulating valve 8 from the lower port of the first three-way regulating valve 8 and then flows into the heating plate 7 through the hot water circulating pump 5.
At this time, the first control valve 10 is closed, the second control valve 11 is opened, and water does not flow through the heat recovery heat exchanger 12.
At this time, the lower port of the second three-way regulating valve 9 is closed, and water directly flows into the upper port of the second three-way regulating valve 9 from the right port of the second three-way regulating valve 9 and then flows into the lower port of the first three-way regulating valve 8.
Cooling of the two groups of heating plates 7 is completed, and then the vacuum freeze drying process is finished, and discharging can be carried out.
Claims (4)
1. A waste heat recovery device of a vacuum freeze drying heating system comprises a heating tank (1), a heating circulating pump (2), a cooling tower (3), a cooling heat exchanger (6), a heat recovery heat exchanger (12) and a heating plate (7); the method is characterized in that:
a first water inlet pipeline of the heating tank (1) is connected with a water outlet of the heat exchanger (4);
a second water inlet of the heating tank (1) is connected with a water inlet of the heat exchanger (4) through a heating circulating pump (2);
a water outlet pipeline of the heating tank (1) is connected with a first port of a first three-way regulating valve (8);
the second port of the first three-way regulating valve (8) is connected with the water inlet of the heating plate (7) through the pipeline of the hot water circulating pump (5);
a water outlet pipeline of the heating plate (7) is connected with a first port of a second three-way regulating valve (9), and a second control valve (11) is arranged on the pipeline;
a communication pipeline (21) is arranged between points B and C on two sides of the second control valve (11), and a first control valve (10) is arranged on the communication pipeline (21);
the point B is positioned on one side of the second three-way regulating valve (9);
the point C is positioned on one side of the heating plate (7);
the communication pipeline (21) passes through the heat recovery heat exchanger (12);
a steam pipeline is arranged in the heat recovery heat exchanger (12), one end of the steam pipeline is connected with an outlet pipeline (16) of the compressor, and the other end of the steam pipeline is connected with an inlet pipeline (15) of the evaporative condenser;
a second port pipeline of the second three-way regulating valve (9) is connected with a third port of the first three-way regulating valve (8);
a third port pipeline (17) of the second three-way regulating valve is connected to a pipeline A point between a first port of the second three-way regulating valve (9) and the second control valve (11);
the point A is positioned at one side of the second three-way regulating valve (9);
the point B is positioned on one side of the second control valve (11);
a third port pipeline (17) of the second three-way regulating valve penetrates through the cooling heat exchanger (6);
the pipeline in the cooling heat exchanger (6) is connected with the cooling tower (3) and circulates through a cooling circulating pump (18);
and a pipeline between the point A and the point B is connected to a second water inlet connected with the heating tank (1) through a pipeline.
2. The waste heat recovery device of the vacuum freeze drying heating system according to claim 1, characterized in that: the heat exchanger (4) is a steam heat exchanger.
3. The waste heat recovery device of the vacuum freeze drying heating system according to claim 1, characterized in that:
a heating plate temperature sensor (19) is arranged at a water inlet of the heating plate (7);
the heating tank (1) is provided with a heating tank temperature sensor (20).
4. The waste heat recovery device of the vacuum freeze drying heating system according to claim 1, characterized in that: the two groups of heating plates (7) are arranged, and the second port of the first three-way regulating valve (8) is respectively connected with the water inlets of the two groups of heating plates (7) through the pipeline of the hot water circulating pump (5);
the water outlet pipelines of the heating plates (7) at two sides are combined and then connected with a first port of a second three-way regulating valve (9), and a second control valve (11) is arranged on the combined pipeline;
the point C is positioned at the position where the water outlet pipelines of the two groups of heating plates (7) are combined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585133.7U CN211552240U (en) | 2020-08-04 | 2020-08-04 | Waste heat recovery device of vacuum freeze drying heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585133.7U CN211552240U (en) | 2020-08-04 | 2020-08-04 | Waste heat recovery device of vacuum freeze drying heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211552240U true CN211552240U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021585133.7U Active CN211552240U (en) | 2020-08-04 | 2020-08-04 | Waste heat recovery device of vacuum freeze drying heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211552240U (en) |
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2020
- 2020-08-04 CN CN202021585133.7U patent/CN211552240U/en active Active
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