CN204358988U - ammonia and carbon dioxide indirect refrigeration system - Google Patents
ammonia and carbon dioxide indirect refrigeration system Download PDFInfo
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- CN204358988U CN204358988U CN201420683899.7U CN201420683899U CN204358988U CN 204358988 U CN204358988 U CN 204358988U CN 201420683899 U CN201420683899 U CN 201420683899U CN 204358988 U CN204358988 U CN 204358988U
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Abstract
The utility model discloses a kind of ammonia and carbon dioxide indirect refrigeration system, comprise ammonia evaporator, carbon dioxide low pressure circulation receiver, carbon dioxide canned motor pump, ammonia liquid/gas separator, ammonia screw type refrigerating compressor group, ammonia condenser, ammonia liquid reservoir and ammonia throttling arrangement.Although this refrigeration system eliminates carbon dioxide screw compressor unit, carbon dioxide liquid reservoir and carbon dioxide throttling device in former refrigeration system, but remain ammonia in former refrigeration system only to limit and be used in machine room, to personnel's fanout free region, to the free of contamination advantage of food, and this refrigeration system simplifies more, equipment is few, floor space is little, project installation amount is little, it is simple, easy to operate to control and cost is low; Ammonia screw compressor unit in former refrigeration system is replaced by ammonia screw type refrigerating compressor group in this refrigeration system, can not only be used in cryogenic refrigeration operating mode, can also be used in height, middle temperature cooling condition, the cooling condition scope of application is wider.
Description
Technical field
The utility model relates to refrigeration system, refer to particularly a kind of using ammonia as cold-producing medium, using carbon dioxide as the ammonia of refrigerating medium and carbon dioxide indirect refrigeration system.
Background technology
At present, in industrial refrigeration field, the use amount of ammonia refrigerant is larger, ammonia is natural environmental-protective cold-producing medium, ozone layer and greenhouse effects are free from side effects, and have be easy to obtain, cheap, moderate pressure, Energy Efficiency Ratio are high, exothermic coefficient is high, be dissolved in oil hardly, flow resistance is little, the advantage such as easily to find during leakage.But ammonia scent of, toxicity and combustibility, adopt ammonia pump liquid provision mode to be applied to food stuff refrigerated storage and there is certain security, especially in densely populated area, for the sake of security, have many designing requirements to the charging amount of ammonia and the position of existence thereof.Particularly recent, ammonia refrigeration system there occurs the accident such as fire, leakage, causes a large amount of casualties and food pollution.Although State Council's accident investigation group is clearly that ammonia refrigerant still exists certain harmfulness due to it because negligence of management and violation operation caused in report, makes it use and be subject to certain restrictions.
Along with going deep into further of studying cold-producing medium, carbon dioxide enters the visual field of people again in the application of refrigerating field as cold-producing medium.Carbon dioxide is also a kind of natural environmental-protective cold-producing medium, nontoxic and do not fire, in some ranges of application, there is higher efficiency, therefore, in many relevant application scenarios, adopt the cascade refrigeration system of ammonia and carbon dioxide composition, can be widely used in having to refrigerant charge the refrigeration occasion relating to security regulations in safety restriction or technique.The ammonia/carbon dioxide cascade refrigeration system being illustrated in figure 1 prior art comprises carbon dioxide screw compressor unit 1, carbon dioxide/ammonia condensing evaporimeter 2, carbon dioxide liquid reservoir 3, carbon dioxide throttling device 4, carbon dioxide low pressure circulation receiver 5, carbon dioxide canned motor pump 6, carbon dioxide evaporimeter 7, ammonia screw compressor unit 8, ammonia condenser 9, ammonia liquid reservoir 10, ammonia throttling arrangement 11 and ammonia liquid/gas separator 12.Its kind of refrigeration cycle is: in low-temperature level part, carbon dioxide screw compressor unit 1 sucks carbon dioxide coolant steam from carbon dioxide low pressure circulation receiver 5, after overcompression, in carbon dioxide/ammonia condensing evaporimeter 2, cooled dose of ammonia condensing becomes carbon dioxide liquid, be stored in carbon dioxide liquid reservoir 3, by being stored in carbon dioxide low pressure circulation receiver 5 after carbon dioxide throttling device 4, by carbon dioxide canned motor pump 6, carbon dioxide liquid is transported to heat absorption evaporation in carbon dioxide evaporimeter 7 again, then get back in carbon dioxide low pressure circulation receiver 5 and be separated, carbon dioxide coolant steam after separation is sucked by carbon dioxide screw compressor unit 1 again, thus complete the circulation of low temperature part carbon dioxide refrigeration, in high-temperature level part, ammonia screw compressor unit 8 sucks ammonia refrigerant steam from ammonia liquid/gas separator 12, in ammonia condenser 9, ammonia liquid is condensed into after overcompression, be stored in ammonia liquid reservoir 10, by being stored in ammonia liquid/gas separator 12 after ammonia throttling arrangement 11, rely on gravity from carrying liquid to carbon dioxide/ammonia condensing evaporimeter 2 bottom it, cooled dose of carbon dioxide flashes to ammonia gas, then get back in ammonia liquid/gas separator 12 and be separated, ammonia refrigerant steam after separation is sucked by ammonia screw compressor unit 8 again, thus complete the circulation of high-temperature part ammonia refrigeration.
Above-mentioned ammonia/carbon dioxide cascade refrigeration system, be applied to the occasion of the densely populated place such as storehouse, work and Production Regional, relative to traditional ammonia refrigeration system, to personnel's fanout free region, pollution-free to food, cold-producing medium ammonia only can be limit as the high-temperature part of cascade refrigeration system and be used in machine room, avoid directly contacting with food, and reduce the charging amount of ammonia, substantially increase the public safety in food and urban district.But, because carbon dioxide/ammonia screw cascade refrigeration compressibility can only be used for cryogenic refrigeration operating mode, and also have that design pressure is high, equipment is many, floor space is large, project installation amount is large, it is complicated to control, operation easier is large, the more high unfavorable factor of cost, particularly this refrigeration system needs a design, carbon dioxide screw type refrigerating compressor group that manufacture difficulty is higher, thus limits this refrigeration system promoting the use of in industrial refrigeration field.
Summary of the invention
The purpose of this utility model is exactly for above-mentioned defect, there is provided a kind of using ammonia as cold-producing medium, using carbon dioxide as the ammonia of refrigerating medium and carbon dioxide indirect refrigeration system, its not only refrigerating efficiency high, fill ammonia amount few, to personnel's fanout free region, pollution-free to food, and its equipment few, install simple, easy to operate, cost is low, more can meet the instructions for use of densely populated place occasion.
For achieving the above object, ammonia designed by the utility model and carbon dioxide indirect refrigeration system, comprise ammonia evaporator, carbon dioxide low pressure circulation receiver, ammonia liquid/gas separator, ammonia screw type refrigerating compressor group, ammonia condenser, ammonia liquid reservoir and ammonia throttling arrangement; The low pressure supply opening of described ammonia evaporator is connected with the bottom liquid outlet of described ammonia liquid/gas separator, the low pressure gas outlet of described ammonia evaporator is connected with the input of described ammonia liquid/gas separator, the low-pressure admission mouth of described ammonia evaporator is connected with the gas outlet of described carbon dioxide low pressure circulation receiver, and the low pressure liquid outlet of described ammonia evaporator is connected with the inlet of described carbon dioxide low pressure circulation receiver; The air entry of described ammonia screw type refrigerating compressor group is connected with the output of described ammonia liquid/gas separator, the exhaust outlet of described ammonia screw type refrigerating compressor group is connected with the input of described ammonia condenser, the output of described ammonia condenser is connected with the input of described ammonia liquid reservoir, and the output of described ammonia liquid reservoir is connected by the throttling inlet of described ammonia throttling arrangement with described ammonia liquid/gas separator.
Further, also comprise outside carbon dioxide evaporimeter and carbon dioxide canned motor pump, the input of described carbon dioxide evaporimeter is connected by the liquid outlet of described carbon dioxide canned motor pump with described carbon dioxide low pressure circulation receiver, and the output of described carbon dioxide evaporimeter is connected with the air inlet of described carbon dioxide low pressure circulation receiver.
Further, described ammonia screw type refrigerating compressor group is any one unit in single-stage ammonia screw type refrigerating compressor group, single-stage band economizer ammonia screw type refrigerating compressor group, single machine two-stage ammonia screw type refrigerating compressor group or double-machine two-stage ammonia screw type refrigerating compressor group.
The utility model has the advantage of: although refrigeration system of the present utility model eliminates carbon dioxide screw compressor unit, carbon dioxide liquid reservoir and carbon dioxide throttling device in former refrigeration system, but remain ammonia in former refrigeration system only to limit and be used in machine room, to personnel's fanout free region, to the free of contamination advantage of food, and this refrigeration system simplifies more, equipment is few, floor space is little, project installation amount is little, it is simple, easy to operate to control and cost is low;
Ammonia screw compressor unit in former refrigeration system is replaced by ammonia screw type refrigerating compressor group in this refrigeration system, can not only be used in cryogenic refrigeration operating mode, can also be used in height, middle temperature cooling condition, the cooling condition scope of application is wider.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of carbon dioxide in prior art/ammonia cascade refrigeration system;
Fig. 2 is the schematic flow sheet of ammonia of the present utility model and carbon dioxide indirect refrigeration system;
Fig. 3 is the main TV structure schematic diagram of Fig. 2.
In figure, each part numbers is as follows: carbon dioxide screw compressor unit 1, carbon dioxide/ammonia condensing evaporimeter 2, carbon dioxide liquid reservoir 3, carbon dioxide throttling device 4, carbon dioxide low pressure circulation receiver 5, carbon dioxide canned motor pump 6, carbon dioxide evaporimeter 7, ammonia screw compressor unit 8, ammonia condenser 9, ammonia liquid reservoir 10, ammonia throttling arrangement 11, ammonia liquid/gas separator 12, ammonia screw type refrigerating compressor group 13, ammonia evaporator 14.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Carbon dioxide of the prior art/ammonia cascade refrigeration system as shown in Figure 1, has done detailed introduction in the introduction, has repeated no more therewith.
Ammonia as shown in Figure 2,3 and carbon dioxide indirect refrigeration system, comprise ammonia evaporator 14, carbon dioxide low pressure circulation receiver 5, carbon dioxide canned motor pump 6, ammonia liquid/gas separator 12, ammonia screw type refrigerating compressor group 13, ammonia condenser 9, ammonia liquid reservoir 10 and ammonia throttling arrangement 11, and the carbon dioxide evaporimeter 7 of outside.
Wherein: the low pressure supply opening of ammonia evaporator 14 is connected with the bottom liquid outlet of ammonia liquid/gas separator 12, the low pressure gas outlet of ammonia evaporator 14 is connected with the input of ammonia liquid/gas separator 12, the low-pressure admission mouth of ammonia evaporator 14 is connected with the gas outlet of carbon dioxide low pressure circulation receiver 5, and the low pressure liquid outlet of ammonia evaporator 14 is connected with the inlet of carbon dioxide low pressure circulation receiver 5; The liquid outlet of carbon dioxide low pressure circulation receiver 5 is connected by the input of carbon dioxide canned motor pump 6 with carbon dioxide evaporimeter 7, and the output of carbon dioxide evaporimeter 7 is connected with the air inlet of carbon dioxide low pressure circulation receiver 5; The air entry of ammonia screw type refrigerating compressor group 13 is connected with the output of ammonia liquid/gas separator 12, the exhaust outlet of ammonia screw type refrigerating compressor group 13 is connected with the input of ammonia condenser 9, the output of ammonia condenser 9 is connected with the input of ammonia liquid reservoir 10, and the output of ammonia liquid reservoir 10 is connected with the throttling inlet of ammonia liquid/gas separator 12 by ammonia throttling arrangement 11.
Ammonia screw type refrigerating compressor group 13 in the present embodiment is any one unit in single-stage ammonia screw type refrigerating compressor group, single-stage band economizer ammonia screw type refrigerating compressor group, single machine two-stage ammonia screw type refrigerating compressor group or double-machine two-stage ammonia screw type refrigerating compressor group.
Its kind of refrigeration cycle is: in refriger-ant section, ammonia screw type refrigerating compressor group 13 sucks ammonia refrigerant steam from ammonia liquid/gas separator 12, in ammonia condenser 9, ammonia liquid is condensed into after overcompression, be stored in ammonia liquid reservoir 10, by being stored in ammonia liquid/gas separator 12 after ammonia throttling arrangement 11, rely on gravity from carrying liquid to ammonia evaporator 14 bottom it, ammonia gas is flashed to after absorbing refrigerating medium carbon dioxide heat, then get back in ammonia liquid/gas separator 12 and be separated, ammonia refrigerant steam after separation is sucked by ammonia screw type refrigerating compressor group 13 again, thus complete ammonia refrigeration circulation, in refrigerating medium part, carbon dioxide is stored in be cooled to liquid in ammonia evaporator 14 after in carbon dioxide low pressure circulation receiver 5, by carbon dioxide canned motor pump 6, carbon dioxide liquid is transported to heat absorption evaporation in carbon dioxide evaporimeter 7 again, then get back in carbon dioxide low pressure circulation receiver 5 and be separated, carbon dioxide refrigerating medium steam after separation again enters into ammonia evaporator 14 and is cooled to liquid, thus completes the circulation of carbon dioxide refrigerating medium.
Eliminate the carbon dioxide screw compressor unit 1 in former refrigeration system, carbon dioxide liquid reservoir 3 and carbon dioxide throttling device 4, remain ammonia in former refrigeration system only to limit and be used in machine room, to personnel's fanout free region, to the free of contamination advantage of food, and this refrigeration system simplifies more, equipment is few, floor space is little, project installation amount is little, it is simple, easy to operate to control and cost is low;
Ammonia screw compressor unit 8 in former refrigeration system is replaced by ammonia screw type refrigerating compressor group 13 in this refrigeration system, can not only be used in cryogenic refrigeration operating mode, can also be used in height, middle temperature cooling condition, the cooling condition scope of application is wider.
Claims (3)
1. ammonia and a carbon dioxide indirect refrigeration system, is characterized in that: comprise ammonia evaporator (14), carbon dioxide low pressure circulation receiver (5), ammonia liquid/gas separator (12), ammonia screw type refrigerating compressor group (13), ammonia condenser (9), ammonia liquid reservoir (10) and ammonia throttling arrangement (11); The low pressure supply opening of described ammonia evaporator (14) is connected with the bottom liquid outlet of described ammonia liquid/gas separator (12), the low pressure gas outlet of described ammonia evaporator (14) is connected with the input of described ammonia liquid/gas separator (12), the low-pressure admission mouth of described ammonia evaporator (14) is connected with the gas outlet of described carbon dioxide low pressure circulation receiver (5), and the low pressure liquid outlet of described ammonia evaporator (14) is connected with the inlet of described carbon dioxide low pressure circulation receiver (5); The air entry of described ammonia screw type refrigerating compressor group (13) is connected with the output of described ammonia liquid/gas separator (12), the exhaust outlet of described ammonia screw type refrigerating compressor group (13) is connected with the input of described ammonia condenser (9), the output of described ammonia condenser (9) is connected with the input of described ammonia liquid reservoir (10), and the output of described ammonia liquid reservoir (10) is connected by the throttling inlet of described ammonia throttling arrangement (11) with described ammonia liquid/gas separator (12).
2. ammonia according to claim 1 and carbon dioxide indirect refrigeration system, it is characterized in that: also comprise outside carbon dioxide evaporimeter (7) and carbon dioxide canned motor pump (6), the input of described carbon dioxide evaporimeter (7) is connected with the liquid outlet of described carbon dioxide low pressure circulation receiver (5) by described carbon dioxide canned motor pump (6), and the output of described carbon dioxide evaporimeter (7) is connected with the air inlet of described carbon dioxide low pressure circulation receiver (5).
3. ammonia according to claim 1 and carbon dioxide indirect refrigeration system, is characterized in that: described ammonia screw type refrigerating compressor group (13) is single-stage ammonia screw type refrigerating compressor group, any one unit in single-stage band economizer ammonia screw type refrigerating compressor group, single machine two-stage ammonia screw type refrigerating compressor group or double-machine two-stage ammonia screw type refrigerating compressor group.
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| CN201420683899.7U CN204358988U (en) | 2014-11-14 | 2014-11-14 | ammonia and carbon dioxide indirect refrigeration system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157268A (en) * | 2015-08-25 | 2015-12-16 | 吴家伟 | CO2 cascade refrigeration system with hot gas defrosting function |
| CN107677003A (en) * | 2017-11-08 | 2018-02-09 | 福建雪人股份有限公司 | A kind of overlapping, refrigerating bimodulus refrigeration system |
| CN107923660A (en) * | 2015-08-10 | 2018-04-17 | 金尾英敏 | Ammonia refrigerating plant |
| CN108151386A (en) * | 2017-12-22 | 2018-06-12 | 台州龙江化工机械科技有限公司 | A kind of refrigeration system and operating method of brine ice making |
| CN108302841A (en) * | 2018-03-28 | 2018-07-20 | 昆山金宏二氧化碳有限公司 | A kind of circulator applied to the liquefied ammonia refrigeration in carbon dioxide purification technology |
| CN110530044A (en) * | 2019-09-26 | 2019-12-03 | 山东神舟制冷设备有限公司 | A kind of high-efficiency carbon dioxide refrigeration equipment |
| CN110671848A (en) * | 2019-10-16 | 2020-01-10 | 滨州市马士滨生物科技有限公司 | Control system of carbon dioxide high-efficiency refrigeration equipment |
| CN114704972A (en) * | 2022-04-27 | 2022-07-05 | 冰轮环境技术股份有限公司 | Carbon dioxide cold-carrying unit for artificial stratum freezing system |
-
2014
- 2014-11-14 CN CN201420683899.7U patent/CN204358988U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107923660A (en) * | 2015-08-10 | 2018-04-17 | 金尾英敏 | Ammonia refrigerating plant |
| CN105157268A (en) * | 2015-08-25 | 2015-12-16 | 吴家伟 | CO2 cascade refrigeration system with hot gas defrosting function |
| CN107677003A (en) * | 2017-11-08 | 2018-02-09 | 福建雪人股份有限公司 | A kind of overlapping, refrigerating bimodulus refrigeration system |
| CN108151386A (en) * | 2017-12-22 | 2018-06-12 | 台州龙江化工机械科技有限公司 | A kind of refrigeration system and operating method of brine ice making |
| CN108151386B (en) * | 2017-12-22 | 2020-12-11 | 台州龙江化工机械科技有限公司 | Refrigerating system for making ice by brine and operation method |
| CN108302841A (en) * | 2018-03-28 | 2018-07-20 | 昆山金宏二氧化碳有限公司 | A kind of circulator applied to the liquefied ammonia refrigeration in carbon dioxide purification technology |
| CN110530044A (en) * | 2019-09-26 | 2019-12-03 | 山东神舟制冷设备有限公司 | A kind of high-efficiency carbon dioxide refrigeration equipment |
| CN110671848A (en) * | 2019-10-16 | 2020-01-10 | 滨州市马士滨生物科技有限公司 | Control system of carbon dioxide high-efficiency refrigeration equipment |
| CN110671848B (en) * | 2019-10-16 | 2021-06-15 | 佛山市纳奇电气设备有限公司 | Control system of carbon dioxide high-efficiency refrigeration equipment |
| CN114704972A (en) * | 2022-04-27 | 2022-07-05 | 冰轮环境技术股份有限公司 | Carbon dioxide cold-carrying unit for artificial stratum freezing system |
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