CN216522468U - Compression type ammonia gas refrigerating system - Google Patents
Compression type ammonia gas refrigerating system Download PDFInfo
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- CN216522468U CN216522468U CN202122717767.4U CN202122717767U CN216522468U CN 216522468 U CN216522468 U CN 216522468U CN 202122717767 U CN202122717767 U CN 202122717767U CN 216522468 U CN216522468 U CN 216522468U
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Abstract
The application discloses compression ammonia refrigerating system, including compressor, evaporative condenser, throttling arrangement, evaporimeter, ammonia-liquid separator, desalination water station and desalination raw water preheat the heat exchanger, the compressor gas vent intercommunication preheats heat exchanger ammonia inlet, preheats heat exchanger ammonia outlet intercommunication evaporative condenser, preheats the raw water outlet and desalination water station intercommunication of heat exchanger, desalination water station and evaporative condenser's desalination water supply mouth intercommunication. The refrigeration system selects the evaporative condenser, uses desalted water as cooling water of the evaporative condenser, has high cooling efficiency and low water consumption, can effectively prevent or slow down corrosion and scaling of the evaporative condenser, is provided with the desalted raw water preheating heat exchanger, preheats the desalted raw water by using the heat of high-temperature ammonia gas, improves the heat utilization efficiency, further reduces the condensation load of the evaporative condenser, and can obtain long-term comprehensive operation economy.
Description
Technical Field
The application relates to the technical field of refrigeration, in particular to a compression type ammonia refrigeration system.
Background
The compression type ammonia gas refrigerating system mainly comprises a compressor, an evaporator, a condenser, a throttling device and an ammonia liquid separator. Common condenser types include shell and tube condensers (also known as shell and tube condensers) and evaporative condensers. The shell and tube condenser utilizes cooling water to cool and condense high-temperature ammonia gas, the required amount of the cooling water is large, a cooling tower needs to be configured to cool the cooling water, and the problems of large water consumption and large power consumption of a circulating water pump and a fan exist. The evaporative condenser has high condensation efficiency and low water consumption, but the heat exchange coil therein has the problems of easy corrosion and easy scaling, and has low long-term condensation efficiency and higher operation cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a compression type ammonia gas refrigerating system, which at least solves the problems of low condensing efficiency and high operation cost of the traditional compression type ammonia gas refrigerating system.
According to one aspect of the application, a compression type ammonia gas refrigerating system is provided, and comprises a refrigerating compressor, a condenser, a throttling device, an evaporator, an ammonia liquid separator, a desalted water station and a desalted raw water preheating heat exchanger;
a raw water inlet of the desalted raw water preheating heat exchanger is communicated with a water source, and a raw water outlet of the desalted raw water preheating heat exchanger is communicated with the desalted water station;
the condenser is an evaporative condenser and comprises an evaporative condenser main body, a fan positioned at the top of the evaporative condenser main body, a water baffle plate positioned below the fan, a spray pipe positioned below the water baffle plate, a heat exchange coil positioned below the spray pipe and a desalination water tank positioned at the bottom of the evaporative condenser main body, wherein the heat exchange coil is respectively communicated with the outside through an ammonia gas inlet and an ammonia liquid outlet, the desalination water tank is communicated with the desalination water station through a desalination water replenishing opening, and the desalination water tank is communicated with an external water pump through a desalination water outlet and then communicated with the spray pipe through the water pump;
the exhaust port of the refrigeration compressor is communicated with the ammonia inlet of the desalination raw water preheating heat exchanger, the ammonia outlet of the desalination raw water preheating heat exchanger is communicated with the ammonia inlet of the heat exchange coil, the ammonia liquid outlet of the heat exchange coil is communicated with the inlet of the throttling device, the outlet of the throttling device is communicated with the ammonia liquid inlet of the ammonia liquid separator, the ammonia liquid outlet of the ammonia liquid separator is communicated with the ammonia liquid inlet of the evaporator, the ammonia outlet of the evaporator is communicated with the ammonia inlet of the ammonia liquid separator, and the ammonia outlet of the ammonia liquid separator is communicated with the suction inlet of the refrigeration compressor.
Optionally, the compression-type ammonia refrigeration system further comprises an oil separator, an exhaust port of the refrigeration compressor is communicated with an ammonia inlet of the oil separator, an ammonia outlet of the oil separator is communicated with an ammonia inlet of the desalted raw water preheating heat exchanger, and a lubricating oil outlet of the oil separator is communicated with the refrigeration compressor.
Optionally, the compression-type ammonia gas refrigeration system further comprises a liquid reservoir, the ammonia liquid outlet of the heat exchange coil is communicated with the inlet of the liquid reservoir, and the outlet of the liquid reservoir is communicated with the inlet of the throttling device.
Optionally, the refrigeration compressor is a piston compressor.
Optionally, the refrigeration compressor is a screw compressor.
Optionally, the throttling device is an expansion valve.
Optionally, the compression-type ammonia refrigeration system further comprises an ammonia pipeline bypassing an ammonia inlet and an ammonia outlet of the desalted raw water preheating heat exchanger.
The compression type ammonia refrigeration system selects the evaporative condenser, desalted water is used as cooling water in the evaporative condenser, the cooling efficiency is high, water sources are saved, corrosion and scaling of the evaporative condenser can be effectively prevented or slowed down, meanwhile, a desalted raw water preheating heat exchanger is arranged in the system, desalted raw water is preheated by heat of high-temperature ammonia gas discharged from a refrigeration compressor, the heat utilization efficiency is improved, the condensation load of the evaporative condenser is further reduced, and long-term comprehensive operation economy can be obtained.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic diagram of the system configuration of a compression type ammonia refrigeration system in one embodiment of the present application;
FIG. 2 is a schematic diagram of the basic structure of an evaporative condenser according to an embodiment of the present application;
fig. 3 is a schematic diagram showing the system configuration of a compression-type ammonia gas refrigeration system in another embodiment of the present application.
Reference numerals:
1-a refrigeration compressor; 2-an evaporative condenser; 20-an evaporative condenser body; 21-a fan; 22-a water baffle; 23-a spray pipe; 24-a heat exchange coil; 241-inlet of heat exchange coil; 242-heat exchange coil outlet; 25-a desalted water replenishing port; 26-a desalination water tank; 27-a desalted water outlet; 28-a water pump; 3-a throttling device; 4-an ammonia-liquid separator; 5-an evaporator; 6-a desalted water station; 7-desalted raw water preheating heat exchanger; 71-a bypass line; an 8-oil separator; 9-liquid reservoir.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Example one
As shown in fig. 1, the basic components of the compression-type ammonia gas refrigeration system provided by the present embodiment include a refrigeration compressor 1, an evaporative condenser 2, a throttling device 3, an ammonia liquid separator 4, an evaporator 5, a desalted water station 6, and a desalted raw water preheating heat exchanger 7.
The refrigeration compressor may be a single-stage compressor, or a two-stage compressor, or a single-stage two-stage compressor, or a single-unit two-stage compression method, and in this embodiment, a single-stage compressor is taken as an example. The refrigeration compressor can be selected from a piston compressor, a screw compressor and the like, and the screw compressor is taken as an example in the embodiment.
The evaporative condenser 2 is illustrated in fig. 2, and includes an evaporative condenser main body 20, a fan 21 located at the top of the evaporative condenser main body 20, a water baffle 22 located below the fan 21, a shower pipe 23 located below the water baffle 22, a heat exchange coil 24 located below the shower pipe 23, a heat exchange coil inlet (ammonia gas inlet) 241 and a heat exchange coil outlet (ammonia liquid outlet) 242 located on the side wall of the evaporative condenser main body 20, a desalted water replenishing port 25 located below the heat exchange coil 24 and opened on the side wall of the evaporative condenser main body 20, a desalted water tank 26 located at the bottom of the evaporative condenser main body 20, a desalted water outlet 27 located on the lower side wall of the evaporative condenser main body 20, and a water pump 28 located outside the evaporative condenser main body 20.
In this embodiment, the expansion valve is taken as an example of the throttle device 3.
The desalted water station is a facility for producing desalted water, and can be a desalted water treatment system adopting a reverse osmosis process, or a desalted water treatment system combining an ion exchange process and a cation-anion resin bed process, and the like. Related facilities and systems are all the prior art, and the structure and the working principle are not described in detail herein. The desalted raw water used in the desalted water treatment system may be surface water or ground water, and is often preheated before the desalting treatment. The application provides a desalination raw water preheats heat exchanger, makes it realize the heat exchange between the high temperature ammonia of following the compressor discharge and the desalination raw water, preheats the desalination raw water of treating. In this embodiment, the desalted raw water preheating heat exchanger 7 is exemplified by a shell-and-tube heat exchanger, high-temperature ammonia gas is used as a shell-side fluid, and desalted raw water is used as a tube-side fluid to circulate therein for heat exchange.
As shown in fig. 1, the discharge port of the refrigeration compressor 1 communicates with the ammonia gas inlet of the desalted raw water preheating heat exchanger 7 through a discharge duct. The raw water inlet of the desalted raw water preheating heat exchanger 7 is communicated with a water source (not shown), and the raw water outlet of the desalted raw water preheating heat exchanger 7 is communicated with the desalted water station 6. In this embodiment, an oil separator 8 is further connected in series between the refrigeration compressor 1 and the desalinated raw water preheating heat exchanger 7, high-temperature ammonia gas discharged from the refrigeration compressor 1 flows through the oil separator 8 first, and enters and exits through an ammonia gas inlet and an ammonia gas outlet of the oil separator 8, and a lubricating oil outlet is provided at the lower portion of the oil separator 8 and is communicated with the refrigeration compressor 1 through an oil return pipe, so that lubricating oil which is separated from the high-temperature ammonia gas and is carried by the high-temperature ammonia gas from the refrigeration compressor 1 is returned to the refrigeration compressor 1. An ammonia gas inlet of the oil separator 8 is communicated with an exhaust port of the refrigeration compressor 1, and an ammonia gas outlet of the oil separator 8 is communicated with an ammonia gas inlet of the desalted raw water preheating heat exchanger 7. The ammonia outlet of the desalted raw water preheating heat exchanger 7 is communicated with the heat exchange coil inlet 241 of the evaporative heat exchanger 2.
As shown in fig. 2, ammonia gas that has been subjected to heat exchange with the desalinated raw water and cooled in the desalinated raw water preheating heat exchanger 7 enters the heat exchange coil 24 from the heat exchange coil inlet 241, exchanges heat with desalinated water sprayed from the spray pipe 23 located above the heat exchange coil 24, condenses into liquid ammonia, and flows out from the heat exchange coil outlet 242. Desalted water is pumped to the spraying pipe 23 from the desalted water tank 26 at the bottom of the evaporative condenser main body 20 under the action of water pumping power of the water pump 28, is sprayed out of the spraying pipe 23 and is sprayed on the outer surface of the heat exchange coil 24, heat exchange is carried out between the desalted water and ammonia flowing in the heat exchange coil 24 through the pipe wall, desalted water heated and evaporated in the heat exchange process is discharged from the top of the evaporative condenser main body 20 under the action of the fan 21, and excessive unevaporated desalted water is in countercurrent contact with air to be cooled and falls back to the desalted water tank 26 at the bottom of the evaporative condenser main body 20 for recycling. The desalted water replenishing port 25 communicates with the desalted water station 6, and the desalted water station 6 replenishes the desalted water consumed in the desalted water tank 26 at the bottom of the evaporative condenser main body 20.
As shown in fig. 1, the evaporative condenser 2 is in communication with the throttling device 3, i.e. the heat exchange coil outlet 242 is in communication with the inlet of the throttling device 3. In this embodiment, a liquid receiver 9 is further connected in series between the evaporative condenser 2 and the throttling device 3, and the liquid receiver 9 is used for adjusting the flow rate of ammonia liquid in the refrigeration system. The outlet of the throttling device 3 is communicated with the ammonia liquid inlet of the ammonia liquid separator 4, and the ammonia liquid after being cooled and decompressed by the throttling device 3 returns to the ammonia liquid separator 4 through the ammonia liquid inlet of the ammonia liquid separator 4. An ammonia liquid outlet of the ammonia liquid separator 4 is communicated with an ammonia liquid inlet of the evaporator 5, and ammonia liquid enters the evaporator 5 from the ammonia liquid separator 4 to exchange heat with air in a cooled object, such as a space to be cooled, and is gasified into low-temperature and low-pressure ammonia gas after absorbing heat of the cooled object. An ammonia gas outlet of the evaporator 5 is communicated with an ammonia gas inlet of the ammonia liquid separator 4, low-temperature and low-pressure ammonia gas enters the ammonia liquid separator 4 and then is subjected to gas-liquid separation, a liquid part is stored at the bottom of the ammonia liquid separator 4, a gaseous part is sucked into the refrigeration compressor 1 from the ammonia gas outlet of the ammonia liquid separator 4 through a suction inlet of the refrigeration compressor 1, is compressed by the refrigeration compressor 1 and then becomes high-temperature and high-pressure ammonia gas, and then is discharged through a discharge outlet of the refrigeration compressor 1 and enters the evaporative condenser 2 for condensation.
Example two
The compression type ammonia refrigerating system provided by the embodiment is similar to the embodiment, and only different points are described here, namely: an ammonia bypass pipeline 71 of the desalted raw water preheating heat exchanger 7 is additionally arranged, namely an ammonia pipeline bypassing an ammonia inlet and an ammonia outlet of the desalted raw water preheating heat exchanger 7, and at least a part of high-temperature ammonia can directly enter the evaporative condenser 2 through the bypass pipeline 71 without passing through the desalted raw water preheating heat exchanger 7. Control valves may be provided in both the pipeline entering the desalted raw water preheating heat exchanger 7 and the bypass pipeline 71 to regulate the flow rate of the high-temperature ammonia gas entering the desalted raw water preheating heat exchanger 7.
The compression type ammonia refrigeration system provided by the utility model selects the evaporative condenser, and desalted water is used as cooling water in the evaporative condenser, so that the compression type ammonia refrigeration system has high cooling efficiency, saves water sources, and can effectively prevent or slow down corrosion and scaling of the evaporative condenser.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a compression ammonia refrigerating system, includes refrigeration compressor, condenser, throttling arrangement, evaporimeter and ammonia-liquid separator, its characterized in that:
the refrigeration system also comprises a desalted water station and a desalted raw water preheating heat exchanger, wherein a raw water inlet of the desalted raw water preheating heat exchanger is communicated with a water source, and a raw water outlet of the desalted raw water preheating heat exchanger is communicated with the desalted water station;
the condenser is an evaporative condenser and comprises an evaporative condenser main body, a fan positioned at the top of the evaporative condenser main body, a water baffle plate positioned below the fan, a spray pipe positioned below the water baffle plate, a heat exchange coil positioned below the spray pipe and a desalination water tank positioned at the bottom of the evaporative condenser main body, wherein the heat exchange coil is respectively communicated with the outside through an ammonia gas inlet and an ammonia liquid outlet, the desalination water tank is communicated with the desalination water station through a desalination water replenishing opening, and the desalination water tank is communicated with an external water pump through a desalination water outlet and then communicated with the spray pipe through the water pump;
the exhaust port of the refrigeration compressor is communicated with the ammonia inlet of the desalination raw water preheating heat exchanger, the ammonia outlet of the desalination raw water preheating heat exchanger is communicated with the ammonia inlet of the heat exchange coil, the ammonia liquid outlet of the heat exchange coil is communicated with the inlet of the throttling device, the outlet of the throttling device is communicated with the ammonia liquid inlet of the ammonia liquid separator, the ammonia liquid outlet of the ammonia liquid separator is communicated with the ammonia liquid inlet of the evaporator, the ammonia outlet of the evaporator is communicated with the ammonia inlet of the ammonia liquid separator, and the ammonia outlet of the ammonia liquid separator is communicated with the suction inlet of the refrigeration compressor.
2. The compression type ammonia gas refrigerating system according to claim 1, wherein:
the device is characterized by further comprising an oil separator, wherein an exhaust port of the refrigeration compressor is communicated with an ammonia gas inlet of the oil separator, an ammonia gas outlet of the oil separator is communicated with an ammonia gas inlet of the desalted raw water preheating heat exchanger, and a lubricating oil outlet of the oil separator is communicated with the refrigeration compressor.
3. The compression type ammonia gas refrigerating system according to claim 1, wherein:
the ammonia liquor outlet of the heat exchange coil is communicated with the inlet of the liquid storage device, and the outlet of the liquid storage device is communicated with the inlet of the throttling device.
4. The compression type ammonia gas refrigerating system according to claim 1, wherein:
the refrigeration compressor is a piston compressor.
5. The compression type ammonia gas refrigerating system according to claim 1, wherein:
the refrigeration compressor is a screw compressor.
6. The compression type ammonia gas refrigerating system according to claim 1, wherein:
the throttling device is an expansion valve.
7. The compression-type ammonia gas refrigerating system according to any one of claims 1 to 6, wherein:
the system also comprises an ammonia pipeline bypassing an ammonia inlet and an ammonia outlet of the desalted raw water preheating heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122717767.4U CN216522468U (en) | 2021-11-08 | 2021-11-08 | Compression type ammonia gas refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122717767.4U CN216522468U (en) | 2021-11-08 | 2021-11-08 | Compression type ammonia gas refrigerating system |
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| Publication Number | Publication Date |
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| CN216522468U true CN216522468U (en) | 2022-05-13 |
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| CN202122717767.4U Active CN216522468U (en) | 2021-11-08 | 2021-11-08 | Compression type ammonia gas refrigerating system |
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- 2021-11-08 CN CN202122717767.4U patent/CN216522468U/en active Active
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