CN216755399U - Low-temperature vacuum evaporator - Google Patents
Low-temperature vacuum evaporator Download PDFInfo
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- CN216755399U CN216755399U CN202122968750.6U CN202122968750U CN216755399U CN 216755399 U CN216755399 U CN 216755399U CN 202122968750 U CN202122968750 U CN 202122968750U CN 216755399 U CN216755399 U CN 216755399U
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- vacuum evaporator
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Abstract
The present invention provides a low temperature vacuum evaporator, comprising: the evaporation tank is provided with a steam outlet and a waste liquid inlet; the first heat exchanger is arranged inside or outside the evaporation tank and used for heating waste liquid; the condensation tank is connected with the steam outlet, and a second heat exchanger is arranged in the condensation tank and used for cooling the steam generated in the evaporation tank; the pressure reducing device is used for vacuumizing the evaporation tank; the preheating device is used for preheating waste liquid and comprises a third heat exchanger, and the third heat exchanger is connected with the first heat exchanger; the heat pump system comprises a compressor and a throttling device, wherein the compressor, the first heat exchanger, the third heat exchanger, the throttling device and the second heat exchanger are connected into a loop through pipelines, and a heat exchange medium flows through the loop. So set up, can increase heat pump system heat utilization efficiency.
Description
Technical Field
The utility model relates to the technical field of environment-friendly equipment, in particular to a low-temperature vacuum evaporator.
Background
The common methods for treating waste liquid or waste water generally adopt precipitation, filtration, evaporation, dosing, sludge treatment and other methods, wherein an evaporator used for evaporation generally supplies heat through a heat pump system, namely a heat exchange medium is compressed through a compressor and is heated through the heat exchange medium, the waste liquid is throttled through a throttling device, the waste liquid is gasified by absorbing heat, and the waste liquid is further returned to the compressor for compression so as to circulate. Before throttling of the throttling device, the heat exchange medium still has high temperature, so if throttling and cooling are directly carried out, part of heat can be wasted, and energy loss is caused.
Therefore, it is necessary to design a low temperature vacuum evaporator to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a low-temperature vacuum evaporator for increasing the heat utilization rate of a heat pump system.
In order to achieve the purpose, the utility model adopts the following technical scheme: a low temperature vacuum vaporizer, comprising:
the evaporation tank is provided with a steam outlet and a waste liquid inlet;
the first heat exchanger is arranged inside or outside the evaporation tank and used for heating waste liquid;
the condensation tank is connected with the steam outlet, and a second heat exchanger is arranged in the condensation tank and used for cooling the steam generated in the evaporation tank;
the pressure reducing device is used for vacuumizing the evaporation tank; and
the preheating device is used for preheating waste liquid and comprises a third heat exchanger, and the third heat exchanger is connected with the first heat exchanger;
the heat pump system comprises a compressor and a throttling device, wherein the compressor, the first heat exchanger, the third heat exchanger, the throttling device and the second heat exchanger are connected into a loop through pipelines, and a heat exchange medium flows through the loop.
As a further improved technical solution of the present invention, the first heat exchanger is a coil heat exchanger or a tube heat exchanger located inside the evaporator tank.
As a further improved technical scheme of the utility model, the first heat exchanger comprises a plurality of mosquito coil pipes which are arranged in a stacked mode.
As a further improved technical scheme of the utility model, the second heat exchanger is a coil heat exchanger or a tube heat exchanger.
As a further improved technical scheme of the utility model, the preheating device further comprises a preheating tank, a third heat exchanger is positioned in the preheating tank, and the third heat exchanger is a coil heat exchanger or a tube heat exchanger.
As a further improved technical scheme, the evaporator further comprises a waste liquid circulating pipeline and a pump arranged on the waste liquid circulating pipeline, the evaporator is provided with a waste liquid circulating inlet and a waste liquid circulating outlet, and two ends of the waste liquid circulating pipeline are respectively connected with the waste liquid circulating inlet and the waste liquid circulating outlet.
As a further improved technical scheme, the waste liquid recycling outlet is positioned at the bottom of the evaporation tank.
As a further improved technical scheme of the utility model, the waste liquid circulating pipeline is connected with a concentrated liquid discharge pipeline.
As a further improved technical solution of the present invention, the throttling device is an expansion valve.
As a further improved technical scheme of the utility model, an air condenser is also arranged between the third heat exchanger and the expansion valve.
According to the technical scheme, the low-temperature vacuum evaporator disclosed by the utility model has the following advantages:
1. the third heat exchanger is arranged between the first heat exchanger and the throttling device, so that the heat of the heat exchange medium with the temperature still higher than the normal temperature is utilized, namely, the stock solution is preheated by the third heat exchanger, the heat of the heat exchange medium is further utilized, the heat utilization rate of the heat pump system can be increased, and the energy loss is reduced;
2. the temperature of the heat exchange medium passing through the third heat exchanger is reduced, so that the power consumption generated by the subsequent air condenser for cooling the heat exchange medium is reduced, the cooling effect is better, and the reduction further plays a role in energy conservation;
3. the waste liquid gets into the evaporating pot temperature after preheating and improves, and the evaporation temperature that reaches when further heating through first heat exchanger is faster for the evaporation process improves the evaporating pot evaporation effect, has improved evaporation efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a low-temperature vacuum evaporator according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, a low-temperature vacuum evaporator according to an embodiment of the present invention includes an evaporation tank 1 for evaporating waste liquid, a first heat exchanger 2 for heating the waste liquid, a condensation tank 3 connected to the evaporation tank 1, a second heat exchanger disposed in the condensation tank 3 for cooling steam, a heat pump system 4 for providing a heat exchange medium, a pressure reducer 6 for vacuumizing the evaporation tank 1, and a preheating device 5 for preheating the waste liquid.
Specifically, the first heat exchanger 2 of this embodiment sets up in evaporating pot 1, and the preferred is coil heat exchanger, and in this case, first heat exchanger includes the mosquito-repellent incense coil of a plurality of range upon range of settings. In other embodiments, the first heat exchanger 2 may also be another internal heat exchanger, such as a tube; or the first heat exchanger is an external heat exchanger arranged outside the evaporating pot, such as a plate heat exchanger.
The evaporating pot 1 is provided with a waste liquid inlet 12, a steam outlet 11, a waste liquid circulating inlet 13 and a waste liquid circulating outlet 14. Preferably, the steam outlet 11 is arranged at or near the top of the evaporation tank 1; a waste liquid circulation inlet 13 is arranged at the lower part of the evaporation tank, and a waste liquid circulation outlet 14 is arranged at the bottom of the evaporation tank 1. In this embodiment, the low-temperature vacuum evaporator further includes a waste liquid circulation pipeline 71 and a pump 72 disposed on the waste liquid circulation pipeline 71 to circularly evaporate the waste liquid in the evaporation tank 1, and two ends of the waste liquid circulation pipeline 71 are respectively connected to the waste liquid circulation inlet 13 and the waste liquid circulation outlet 14. The waste liquid circulation pipeline 71 is connected with a concentrated liquid discharge pipeline 8, and when the waste liquid is circularly evaporated to a preset concentration, the concentrated liquid discharge pipeline 8 is opened and the concentrated waste liquid is discharged.
The condensing tank 3 is communicated with the steam outlet 11 through a steam pipeline, so that the steam generated in the evaporating tank 1 enters the condensing tank 3 through the steam pipeline for cooling. Similarly, a second heat exchanger, preferably a tubular heat exchange tube, is arranged in the condensing tank 3; in other embodiments, the second heat exchanger may also be another internal heat exchanger, such as a coil heat exchanger.
The preheating device 5 is used for preheating the waste liquid and is arranged between the first heat exchanger 2 and the throttling device 42. Specifically, the preheating device 5 includes a third heat exchanger 51 and a preheating tank 52. The third heat exchanger 51 is located inside the preheating tank 52, and the third heat exchanger 51 is a coil heat exchanger or a tube heat exchanger. In this embodiment, the third heat exchanger 51 is preferably a spiral coil heat exchanger, and the preheating tank 52 is connected to the waste liquid inlet 12. In this embodiment, the third heat exchanger 51 is a coil heat exchanger. In other embodiments, the preheating device may also be provided in other ways, such as a plate heat exchanger.
In the present embodiment, the heat pump system 4 includes a compressor 41, a throttle device 42, and a wind condenser 43. Preferably, the restriction 42 is an expansion valve. In other embodiments, the throttling device 42 may be other throttling structures, such as a capillary tube. The compressor 41, the first heat exchanger 2, the third heat exchanger 51, the air condenser 43, the throttle device 42 and the second heat exchanger are connected by pipes to form a loop, and a heat exchange medium flows through the loop. In the evaporation stage, the gaseous heat exchange medium is compressed into high-temperature liquid by the compressor 41, and enters the first heat exchanger 2 to release a large amount of heat, so that the waste liquid in the evaporation tank 1 is heated.
Specifically, the third heat exchanger 51 has a heat exchange medium inlet and a heat exchange medium outlet, the heat exchange medium inlet is connected to the heat exchange medium outlet of the first heat exchanger 2, and the heat exchange medium outlet is connected to the throttling device 42.
After flowing out from the heat exchange medium outlet 22 of the first heat exchanger 2, the heat exchange medium firstly enters the third heat exchanger 51 to preheat the waste liquid in the preheating tank 52, and further releases partial heat; then, the heat exchange medium flowing out of the third heat exchanger 51 is cooled by the air of the air condenser 43 and enters the second heat exchanger after absorbing a large amount of heat by the throttling action of the expansion valve 42, thereby cooling the steam. The heat exchange medium absorbing the heat of the steam is reformed into a gaseous state and enters the compressor 41 to be recycled.
The pressure reducing device 6 is used for vacuumizing the evaporation tank 1. The pressure reducing device 6 of the present embodiment includes a centrifugal water pump 61 and a water jet device 62, wherein the pump 61, the water jet device 62 and the condensation tank 3 are connected as a loop through a pipeline, and the water jet device 62 is connected to the second heat exchanger and further connected to the evaporation tank 1.
In summary, the low-temperature vacuum evaporator of the present invention has the following effects:
1. the third heat exchanger is arranged between the first heat exchanger and the throttling device, so that the heat of the heat exchange medium with the temperature still higher than the normal temperature is utilized, namely, the stock solution is preheated by the third heat exchanger, the heat of the heat exchange medium is further utilized, the heat utilization rate of the heat pump system can be increased, and the energy loss is reduced;
2. the temperature of the heat exchange medium passing through the third heat exchanger is reduced, so that the power consumption generated by the subsequent air condenser for cooling the heat exchange medium is reduced, the cooling effect is better, and the reduction further plays a role in energy conservation;
3. the waste liquid gets into the evaporating pot temperature after preheating and improves, and faster reaching evaporating temperature when further heating through first heat exchanger for the evaporation process improves evaporating pot evaporation effect, has improved evaporation efficiency.
The above embodiments are only for illustrating the utility model and not for limiting the technical solutions described in the utility model, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the utility model in detail with reference to the above embodiments, the technical personnel in the technical field should understand that the technical personnel in the technical field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.
Claims (10)
1. A low temperature vacuum evaporator, comprising:
the evaporation tank is provided with a steam outlet and a waste liquid inlet;
the first heat exchanger is arranged inside or outside the evaporation tank and used for heating waste liquid;
the condensation tank is connected with the steam outlet, and a second heat exchanger is arranged in the condensation tank and used for cooling the steam generated in the evaporation tank;
the pressure reducing device is used for vacuumizing the evaporation tank; and
the preheating device is used for preheating waste liquid and comprises a third heat exchanger, and the third heat exchanger is connected with the first heat exchanger;
the heat pump system comprises a compressor and a throttling device, wherein the compressor, the first heat exchanger, the third heat exchanger, the throttling device and the second heat exchanger are connected into a loop through pipelines, and a heat exchange medium flows through the loop.
2. A cryogenic vacuum evaporator according to claim 1 wherein the first heat exchanger is a coil or tube and tube heat exchanger located inside the evaporator tank.
3. A cryogenic vacuum evaporator according to claim 2 wherein the first heat exchanger comprises a plurality of mosquito coil coils arranged in a stack.
4. A cryogenic vacuum evaporator according to claim 1 wherein the second heat exchanger is a coil heat exchanger or a tube and tube heat exchanger.
5. The cryogenic vacuum evaporator of claim 1 wherein the preheating means further comprises a preheating tank, a third heat exchanger is located inside the preheating tank, and the third heat exchanger is a coil heat exchanger or a tube and tube heat exchanger.
6. A low-temperature vacuum evaporator according to claim 1, further comprising a waste liquid circulation pipeline and a pump disposed on the waste liquid circulation pipeline, wherein the evaporator is provided with a waste liquid circulation inlet and a waste liquid circulation outlet, and two ends of the waste liquid circulation pipeline are respectively connected to the waste liquid circulation inlet and the waste liquid circulation outlet.
7. A cryogenic vacuum evaporator according to claim 6, wherein the waste liquid recycle outlet is located at the bottom of the evaporator tank.
8. A low temperature vacuum evaporator according to claim 6, wherein the waste liquor circulation line is connected to a concentrate discharge line.
9. A cryogenic vacuum evaporator according to claim 1, wherein the throttling means is an expansion valve.
10. A low temperature vacuum evaporator according to claim 1, wherein an air condenser is further provided between the third heat exchanger and the expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122968750.6U CN216755399U (en) | 2021-11-30 | 2021-11-30 | Low-temperature vacuum evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122968750.6U CN216755399U (en) | 2021-11-30 | 2021-11-30 | Low-temperature vacuum evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216755399U true CN216755399U (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122968750.6U Active CN216755399U (en) | 2021-11-30 | 2021-11-30 | Low-temperature vacuum evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216755399U (en) |
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2021
- 2021-11-30 CN CN202122968750.6U patent/CN216755399U/en active Active
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