阅读说明：本技术 一种载冷循环系统 (cold-carrying circulating system ) 是由 公茂琼 郭浩 于 2019-08-27 设计创作，主要内容包括：本发明提供的载冷循环系统,包括：混合工质制冷循环回路和载冷循环回路；所述混合工质制冷回路包括混合工质压缩机(101)、混合工质冷凝器(102)、回热换热器(103)、混合工质节流阀(104)；所述载冷循环回路包括载冷剂驱动泵(201)、载冷剂冷凝器(202)、精密油分离系统(203)、回热换热器(103)、分布式换热器(204)及原料气预冷分离器(302),本发明提供的载冷循环系统,利用具有低凝固点的纯或混合工质的普冷循环作为载冷循环,同时采用高可靠性的普冷温区驱动元件驱动,避免使用低可靠的低温循环泵,可实现-60℃乃至液氮温区的冷量远程传递,结构简单紧凑、成本低廉,运行高效；且载冷循环可采取不可燃工质,特殊场合下安全性高。(The invention provides a cold carrying circulation system, which comprises: a mixed working medium refrigeration circulation loop and a cold-carrying circulation loop; the mixed working medium refrigerating circuit comprises a mixed working medium compressor (101), a mixed working medium condenser (102), a regenerative heat exchanger (103) and a mixed working medium throttle valve (104); the cold-carrying circulation loop comprises a cold-carrying agent driving pump (201), a cold-carrying agent condenser (202), a precision oil separation system (203), a regenerative heat exchanger (103), a distributed heat exchanger (204) and a raw material gas precooling separator (302). the cold-carrying circulation system provided by the invention utilizes common cold circulation of pure or mixed working medium with low freezing point as cold-carrying circulation, and simultaneously adopts a high-reliability common cold temperature region driving element for driving, so that a low-reliability low-temperature circulating pump is avoided, the remote transmission of cold energy in a temperature range of-60 ℃ and even a liquid nitrogen temperature region can be realized, and the cold-carrying circulation loop has the advantages of simple and compact structure, low cost and high; and the cold-carrying circulation can adopt non-combustible working media, so that the safety is high in special occasions.)

1. A cold-carrying cycle system, comprising: a mixed working medium refrigeration circulation loop and a cold-carrying circulation loop; the mixed working medium refrigerating circuit comprises a mixed working medium compressor (101), a mixed working medium condenser (102), a regenerative heat exchanger (103) and a mixed working medium throttle valve (104); the cold-carrying circulation loop comprises a cold-carrying agent drive pump (201), a cold-carrying agent condenser (202), a precision oil separation system (203), a regenerative heat exchanger (103), a distributed heat exchanger (204) and a raw material gas precooling separator (302);

A high-pressure refrigerant outlet of the mixed working medium compressor (101) is connected with a refrigerant high-pressure inlet of the mixed working medium condenser (102), a refrigerant high-pressure outlet of the mixed working medium condenser (102) is connected with a high-pressure refrigerant inlet of the regenerative heat exchanger (103), a high-pressure refrigerant outlet of the regenerative heat exchanger (103) is connected with a refrigerant high-pressure inlet of the mixed working medium throttle valve (104), and a refrigerant low-pressure outlet of the mixed working medium throttle valve (104) is connected with a low-pressure refrigerant inlet of the regenerative heat exchanger (103);

A secondary refrigerant outlet of the secondary refrigerant drive pump (201) is connected with a secondary refrigerant inlet of the secondary refrigerant condenser (202); a secondary refrigerant outlet of the secondary refrigerant condenser (202) is connected with a secondary refrigerant inlet of the precise oil separator (203); a secondary refrigerant outlet of the precise oil separator (203) is connected with a secondary refrigerant inlet of the regenerative heat exchanger (103); a secondary refrigerant outlet of the regenerative heat exchanger (103) is connected with a secondary refrigerant inlet of the distributed heat exchanger (204); the secondary refrigerant outlet of the distributed heat exchanger (204) is connected with the secondary refrigerant inlet of the raw material gas pre-cooling separator (302); a secondary refrigerant outlet of the feed gas pre-cooling separator (302) is connected with a secondary refrigerant inlet of the secondary refrigerant drive pump (201); the oil outlet of the precise oil separator (203) is connected with the secondary refrigerant inlet of the secondary refrigerant drive pump (201);

The feed gas is connected with an inlet of the feed gas cooler (301) through a pipeline, an outlet of the feed gas cooler (302) is connected with a feed gas inlet of the feed gas pre-cooling separator (302), a feed gas outlet of the feed gas pre-cooling separator (302) is connected with a feed gas inlet of the distributed heat exchanger (204), and a feed gas outlet of the distributed heat exchanger (204) is connected with an inlet of the feed gas-liquid separator (302); the feed gas-liquid separator (302) separates a gas phase product and a liquid product.

2. The cold-carrying circulation system as claimed in claim 1, wherein the gas phase outlet of the raw gas separator (302) is connected with the gas phase inlet of the distributed heat exchanger (204), the liquid phase outlet of the raw gas separator (302) is connected with the liquid phase inlet of the distributed heat exchanger (204), and the gas phase outlet and the liquid phase outlet of the distributed heat exchanger (204) are gas phase product and liquid product.

3. The cold-carrier cycle system of claims 1 and 2, wherein said coolant comprises at least one of isobutane, propane, R22, R1234ze (E), R134a, R152a, R227ea, R236ea, perfluorohexane, HFC-4310mee, HFE-7100, HFO-1336mzzZ, SF-70 and SF-10.

4. a cold-carrying cycle system, comprising: a mixed working medium refrigeration circulation loop and a cold-carrying circulation loop; the mixed working medium refrigerating circuit comprises a mixed working medium compressor (101), a mixed working medium condenser (102), a regenerative heat exchanger (103), a mixed working medium throttle valve (104) and a mixed working medium precooling heat exchanger (105); the cold-carrying circulation loop comprises a cold-carrying agent compressor (2010), a cold-carrying agent condenser (202), a precise oil separation system (203), a regenerative heat exchanger (103), a distributed heat exchanger (204), a cold-carrying agent throttle valve (205) and a raw material gas precooling separator (302);

a high-pressure refrigerant outlet of the mixed working medium compressor (101) is connected with a refrigerant high-pressure inlet of the mixed working medium condenser (102), a refrigerant high-pressure outlet of the mixed working medium condenser (102) is connected with a high-pressure refrigerant inlet of the regenerative heat exchanger (103), a high-pressure refrigerant outlet of the mixed working medium condenser (102) is connected with a high-pressure refrigerant inlet of the mixed working medium precooling heat exchanger (105), and a high-pressure refrigerant outlet of the mixed working medium precooling heat exchanger (105) is connected with a high-pressure refrigerant inlet of the regenerative heat exchanger (103); a high-pressure refrigerant outlet of the regenerative heat exchanger (103) is connected with a refrigerant high-pressure inlet of the mixed working medium throttle valve (104), and a refrigerant low-pressure outlet of the mixed working medium throttle valve (104) is connected with a low-pressure refrigerant inlet of the regenerative heat exchanger (103);

a high-pressure secondary refrigerant outlet of the secondary refrigerant compressor (2010) is connected with a high-pressure secondary refrigerant inlet of the secondary refrigerant condenser (202); a high-pressure secondary refrigerant outlet of the secondary refrigerant condenser (202) is connected with a high-pressure secondary refrigerant inlet of the precision oil separator (203); a high-pressure secondary refrigerant outlet of the precision oil separator (203) is connected with a high-pressure secondary refrigerant inlet of the regenerative heat exchanger (103); a high-pressure secondary refrigerant outlet of the regenerative heat exchanger (103) is connected with a high-pressure secondary refrigerant inlet of the distributed heat exchanger (204); the high-pressure secondary refrigerant outlet of the distributed heat exchanger (204) is connected with the high-pressure secondary refrigerant inlet of the secondary refrigerant throttle valve (205); the low-pressure refrigerant outlet of the coolant throttle valve (205) is divided into two parts: one of the two streams is connected with a low-pressure refrigerating medium inlet of the feed gas precooling separator (302); the other strand of the mixed working medium pre-cooling heat exchanger is connected with a low-pressure secondary refrigerant inlet of the mixed working medium pre-cooling heat exchanger (105), and a low-pressure secondary refrigerant outlet of the mixed working medium pre-cooling heat exchanger (105) and a low-pressure refrigerant outlet of the raw material gas pre-cooling separator (302) are connected with a low-pressure refrigerant inlet of a secondary refrigerant compressor (2010); the low-pressure oil outlet of the precision oil separator (203) is connected with the low-pressure secondary refrigerant inlet of the secondary refrigerant compressor (2010);

The feed gas is connected with an inlet of the feed gas cooler (301) through a pipeline, an outlet of the feed gas cooler (302) is connected with a feed gas inlet of the feed gas pre-cooling separator (302), a feed gas outlet of the feed gas pre-cooling separator (302) is connected with a feed gas inlet of the distributed heat exchanger (204), and a feed gas outlet of the distributed heat exchanger (204) is connected with an inlet of the feed gas-liquid separator (302); the feed gas-liquid separator (302) separates a gas phase product and a liquid product.

5. The cold-carrying circulation system as claimed in claim 4, wherein the gas phase outlet of the raw gas separator (302) is connected with the gas phase inlet of the distributed heat exchanger (204), the liquid phase outlet of the raw gas separator (302) is connected with the liquid phase inlet of the distributed heat exchanger (204), and the gas phase outlet and the liquid phase outlet of the distributed heat exchanger (204) are gas phase product and liquid product.

6. The cold-carrier cycle system of claims 4 and 5, wherein the coolant comprises at least one of isobutane, propane, R22, R1234ze (E), R134a, R152a, R227ea, R236 ea.

Technical Field

the invention relates to the technical field of cold carrying, in particular to a cold carrying circulating system.

Background

The mixed working medium refrigeration technology has been widely applied to the liquefaction of natural gas since the 70 s of the 20 th century, and becomes the leading technology in the field of Liquefied Natural Gas (LNG). However, the cryogenic mixed working medium refrigeration technology has limitations when used in air liquefaction separation or oxygen liquefaction and other occasions, but the mixed refrigerant usually contains hydrocarbon combustible components, and when the cryogenic mixed working medium refrigeration technology is applied to air liquefaction separation, once the refrigerant leaks, the hydrocarbon contacts liquid air (liquid oxygen), so that severe reaction is caused, and serious safety problems are brought. Therefore, the multi-component mixed refrigeration technology containing combustible components is directly used in low-temperature air liquefaction separation systems or oxygen liquefaction occasions and has serious potential safety hazards. In addition, along with the further increase of the government supervision on the atmospheric pollution control in recent years, the mixed working medium throttling refrigeration technology has good application prospect in the field of VOCs recovery or oil gas condensation recovery. However, since many components in the VOCs or oil gas corrode parts of the mixed working medium refrigeration system, especially aluminum alloy plate-fin heat exchangers, red copper and other materials, the whole system needs to be replaced by a material with better compatibility, and the cost and the process complexity are increased. The adoption of a cold-carrying circulation isolation feed gas and mixed working medium system to realize indirect cooling liquefaction is a feasible scheme. Because of the reliability problem of the cryogenic pump, the traditional mode of pumping the secondary refrigerant at low temperature has great risk in the application process.

disclosure of Invention

In view of the above, there is a need to provide a safe and reliable cold-carrying circulation system at-60 ℃ or below, even up to the temperature of liquid nitrogen, to overcome the drawbacks of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

In one aspect, the present invention further provides a cooling cycle system, including: a mixed working medium refrigeration circulation loop and a cold-carrying circulation loop; the mixed working medium refrigerating circuit comprises a mixed working medium compressor (101), a mixed working medium condenser (102), a regenerative heat exchanger (103) and a mixed working medium throttle valve (104); the cold-carrying circulation loop comprises a cold-carrying agent drive pump (201), a cold-carrying agent condenser (202), a precision oil separation system (203), a regenerative heat exchanger (103), a distributed heat exchanger (204) and a raw material gas precooling separator (302);

A high-pressure refrigerant outlet of the mixed working medium compressor (101) is connected with a refrigerant high-pressure inlet of the mixed working medium condenser (102), a refrigerant high-pressure outlet of the mixed working medium condenser (102) is connected with a high-pressure refrigerant inlet of the regenerative heat exchanger (103), a high-pressure refrigerant outlet of the regenerative heat exchanger (103) is connected with a refrigerant high-pressure inlet of the mixed working medium throttle valve (104), and a refrigerant low-pressure outlet of the mixed working medium throttle valve (104) is connected with a low-pressure refrigerant inlet of the regenerative heat exchanger (103);

A secondary refrigerant outlet of the secondary refrigerant drive pump (201) is connected with a secondary refrigerant inlet of the secondary refrigerant condenser (202); a secondary refrigerant outlet of the secondary refrigerant condenser (202) is connected with a secondary refrigerant inlet of the precise oil separator (203); a secondary refrigerant outlet of the precise oil separator (203) is connected with a secondary refrigerant inlet of the regenerative heat exchanger (103); a secondary refrigerant outlet of the regenerative heat exchanger (103) is connected with a secondary refrigerant inlet of the distributed heat exchanger (204); the secondary refrigerant outlet of the distributed heat exchanger (204) is connected with the secondary refrigerant inlet of the raw material gas pre-cooling separator (302); a secondary refrigerant outlet of the feed gas pre-cooling separator (302) is connected with a secondary refrigerant inlet of the secondary refrigerant drive pump (201); the oil outlet of the precise oil separator (203) is connected with the secondary refrigerant inlet of the secondary refrigerant drive pump (201);

The feed gas is connected with an inlet of the feed gas cooler (301) through a pipeline, an outlet of the feed gas cooler (302) is connected with a feed gas inlet of the feed gas pre-cooling separator (302), a feed gas outlet of the feed gas pre-cooling separator (302) is connected with a feed gas inlet of the distributed heat exchanger (204), and a feed gas outlet of the distributed heat exchanger (204) is connected with an inlet of the feed gas-liquid separator (302); the feed gas-liquid separator (302) separates a gas phase product and a liquid product.

In some preferred embodiments, the gas phase outlet of the raw gas separator (302) is connected with the gas phase inlet of the distributed heat exchanger (204), the liquid phase outlet of the raw gas separator (302) is connected with the liquid phase inlet of the distributed heat exchanger (204), and the gas phase outlet and the liquid phase outlet of the distributed heat exchanger (204) are the gas phase product and the liquid product.

In some preferred embodiments, the coolant comprises at least one of isobutane, propane, R22, R1234ze (E), R134a, R152a, R227ea, R236ea, perfluorohexane, HFC-4310mee, HFE-7100, HFO-1336mzzZ, SF-70, and SF-10.

in another aspect, the present invention further provides a cooling cycle system, including: a mixed working medium refrigeration circulation loop and a cold-carrying circulation loop; the mixed working medium refrigerating circuit comprises a mixed working medium compressor (101), a mixed working medium condenser (102), a regenerative heat exchanger (103), a mixed working medium throttle valve (104) and a mixed working medium precooling heat exchanger (105); the cold-carrying circulation loop comprises a cold-carrying agent compressor (2010), a cold-carrying agent condenser (202), a precise oil separation system (203), a regenerative heat exchanger (103), a distributed heat exchanger (204), a cold-carrying agent throttle valve (205) and a raw material gas precooling separator (302);

A high-pressure refrigerant outlet of the mixed working medium compressor (101) is connected with a refrigerant high-pressure inlet of the mixed working medium condenser (102), a refrigerant high-pressure outlet of the mixed working medium condenser (102) is connected with a high-pressure refrigerant inlet of the regenerative heat exchanger (103), a high-pressure refrigerant outlet of the mixed working medium condenser (102) is connected with a high-pressure refrigerant inlet of the mixed working medium precooling heat exchanger (105), and a high-pressure refrigerant outlet of the mixed working medium precooling heat exchanger (105) is connected with a high-pressure refrigerant inlet of the regenerative heat exchanger (103); a high-pressure refrigerant outlet of the regenerative heat exchanger (103) is connected with a refrigerant high-pressure inlet of the mixed working medium throttle valve (104), and a refrigerant low-pressure outlet of the mixed working medium throttle valve (104) is connected with a low-pressure refrigerant inlet of the regenerative heat exchanger (103);

a high-pressure secondary refrigerant outlet of the secondary refrigerant compressor (2010) is connected with a high-pressure secondary refrigerant inlet of the secondary refrigerant condenser (202); a high-pressure secondary refrigerant outlet of the secondary refrigerant condenser (202) is connected with a high-pressure secondary refrigerant inlet of the precision oil separator (203); a high-pressure secondary refrigerant outlet of the precision oil separator (203) is connected with a high-pressure secondary refrigerant inlet of the regenerative heat exchanger (103); a high-pressure secondary refrigerant outlet of the regenerative heat exchanger (103) is connected with a high-pressure secondary refrigerant inlet of the distributed heat exchanger (204); the high-pressure secondary refrigerant outlet of the distributed heat exchanger (204) is connected with the high-pressure secondary refrigerant inlet of the secondary refrigerant throttle valve (205); the low-pressure refrigerant outlet of the coolant throttle valve (205) is divided into two parts: one of the two streams is connected with a low-pressure refrigerating medium inlet of the feed gas precooling separator (302); the other strand of the mixed working medium pre-cooling heat exchanger is connected with a low-pressure secondary refrigerant inlet of the mixed working medium pre-cooling heat exchanger (105), and a low-pressure secondary refrigerant outlet of the mixed working medium pre-cooling heat exchanger (105) and a low-pressure refrigerant outlet of the raw material gas pre-cooling separator (302) are connected with a low-pressure refrigerant inlet of a secondary refrigerant compressor (2010); the low-pressure oil outlet of the precision oil separator (203) is connected with the low-pressure secondary refrigerant inlet of the secondary refrigerant compressor (2010);

The feed gas is connected with an inlet of the feed gas cooler (301) through a pipeline, an outlet of the feed gas cooler (302) is connected with a feed gas inlet of the feed gas pre-cooling separator (302), a feed gas outlet of the feed gas pre-cooling separator (302) is connected with a feed gas inlet of the distributed heat exchanger (204), and a feed gas outlet of the distributed heat exchanger (204) is connected with an inlet of the feed gas-liquid separator (302); the feed gas-liquid separator (302) separates a gas phase product and a liquid product.

in some preferred embodiments, the gas phase outlet of the raw gas separator (302) is connected with the gas phase inlet of the distributed heat exchanger (204), the liquid phase outlet of the raw gas separator (302) is connected with the liquid phase inlet of the distributed heat exchanger (204), and the gas phase outlet and the liquid phase outlet of the distributed heat exchanger (204) are the gas phase product and the liquid product.

In some preferred embodiments, the coolant comprises at least one of isobutane, propane, R22, R1234ze (E), R134a, R152a, R227ea, R236 ea.

The invention adopts the technical scheme that the method has the advantages that:

According to the cold carrying circulation system provided by the invention, the common cold circulation of pure or mixed working medium with low freezing point is used as the cold carrying circulation, and meanwhile, the common cold temperature area with high reliability is adopted to drive the pump or the compressor, so that the use of a low-reliable low-temperature circulating pump is avoided, the remote transmission of cold energy in a temperature range of-60 ℃ and even liquid nitrogen can be realized, the structure is simple and compact, the cost is low, and the operation is efficient; and the cold-carrying circulation can adopt non-combustible working media, so that the safety is high in special occasions.

Drawings

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a cooling cycle system provided in embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a cooling cycle system according to another implementation manner provided in embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of a cooling cycle system according to embodiment 2 of the present invention.

Fig. 4 is a schematic structural diagram of a cooling cycle system according to another implementation manner provided in embodiment 2 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.