CN204388412U - A kind of refrigeration system - Google Patents

A kind of refrigeration system Download PDF

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Publication number
CN204388412U
CN204388412U CN201420778889.1U CN201420778889U CN204388412U CN 204388412 U CN204388412 U CN 204388412U CN 201420778889 U CN201420778889 U CN 201420778889U CN 204388412 U CN204388412 U CN 204388412U
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China
Prior art keywords
knockout drum
compressor
outlet
connects
entrance
Prior art date
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Active
Application number
CN201420778889.1U
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Chinese (zh)
Inventor
王同宝
孙火艳
庞睿
周华辉
胡有元
杨彩云
王显炎
周兴
金霈琳
王鲁杰
邵小良
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Sinopec Engineering Group Co Ltd
Sinopec Ningbo Engineering Co Ltd
Sinopec Ningbo Technology Research Institute
Original Assignee
Sinopec Engineering Group Co Ltd
Sinopec Ningbo Engineering Co Ltd
Sinopec Ningbo Technology Research Institute
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Application filed by Sinopec Engineering Group Co Ltd, Sinopec Ningbo Engineering Co Ltd, Sinopec Ningbo Technology Research Institute filed Critical Sinopec Engineering Group Co Ltd
Priority to CN201420778889.1U priority Critical patent/CN204388412U/en
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Abstract

The utility model relates to a kind of refrigeration system, comprises compressor and knockout drum, it is characterized in that: described compressor increases progressively direction along pressure and is provided with one-level entrance, secondary inlet, three grades of entrances and level Four entrance successively; Described knockout drum comprises the first knockout drum, the second knockout drum, the 3rd knockout drum and the 4th knockout drum; Each knockout drum upstream is respectively equipped with choke valve, and the outlet line of described compressor connects corresponding each knockout drum respectively by each surge pipeline.Suction port of compressor is designed to multistage by the utility model, multistage flash evaporation separation is carried out to the liquid phase refrigerant that compressor is sent simultaneously, gas phase after separation returns in compressor from the entrance of correspondence, both the temperature by reducing compressor gas reduces the volume of gas, reduces the work done during compression of compressor; Suitably can reduce again the load of subcooler simultaneously, reduce the size of subcooler, reduce an investment cost of refrigeration system, suitably reduce the outlet pressure of compressor simultaneously, whole refrigeration system can be made more energy-conservation, energy consumption about 42.6% can be saved.

Description

A kind of refrigeration system
Technical field
The utility model relates to a kind of refrigeration system.
Background technology
Current refrigeration modes mainly contains three kinds, compression refrigeration, absorption refrigeration and compression and absorption hybrid refrigeration.Industrial main employing compression refrigeration.
In large-scale coal chemical engineering equipment, generally all use low-temp methanol washing process to carry out gas cleaning with desulfurization and decarburization, and in order to meet the refrigeration requirement of low-temperature rectisol unit, need configuration ice maker unit to provide cold.The cold-producing medium that ice maker unit is conventional has ammonia and hydrocarbon, and freon is usually used as the cold-producing medium of domestic refrigerating appts.
For the refrigeration system of Coal Chemical Industry low-temperature rectisol, the cold that low-temperature rectisol unit needs is generally-40 DEG C, the aftercooler of compressor bank generally adopts circulating water, the liquid propylene of water recirculator outlet is by 43 DEG C of considerations, when 43 DEG C, the saturated vapor pressure of propylene is 1.69MPaG, consider the pressure drop of water recirculator, then the outlet compression of propylene compressor generally designs according to 1.78MPaG, cold is absorbed through low-temperature rectisol unit, propylene after using is-40 DEG C, the saturated vapor pressure of propylene is 0.039MPaG, namely the inlet pressure of compressor is 0.039MPaG, temperature is-40 DEG C.
Gas-phase propene is after compressor compression, enter water recirculator, after being cooled to the liquid propylene of 43 DEG C, enter propylene collecting tank, the liquid propylene of going out bottom propylene collecting tank, be divided into two strands, one removes the tube side of propylene subcooler, one removes the shell side of propylene subcooler, walk that strand of liquid propylene of propylene subcooler shell side, first through choke valve JL-1 vacuum flashing be 0.55MPaG, the gas-liquid two-phase of 3.4 DEG C, for the propylene cooling of tube side provides cold, by the propylene supercooling to 10 DEG C of tube side, deliver to low-temperature rectisol unit out-of-bounds, for it provides required cold.That strand of propylene of shell side, gas phase removes the knockout drum of compressor two sections of entrances, and after isolating liquid phase, two sections of tonifying Qi as compressor enter propylene compressor.
It is higher to there is energy consumption of compressor in existing industrial refrigeration system, the shortcoming that operation operating cost is high.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of energy consumption of compressor low for the present situation of prior art and the low refrigeration system of operation operating cost, thus reach energy-saving and cost-reducing object.
The utility model solves the problems of the technologies described above adopted technical scheme: this refrigeration system, comprise compressor and knockout drum, it is characterized in that: described compressor increases progressively direction along pressure and is provided with one-level entrance, secondary inlet, three grades of entrances and level Four entrance successively; Described knockout drum comprises the first knockout drum, the second knockout drum, the 3rd knockout drum and the 4th knockout drum;
Wherein, the entrance of described first knockout drum connects refrigerant return line outlet, and the outlet of the first knockout drum connects the one-level entrance of described compressor;
The outlet of described compressor connects the first passage entrance of cooler by outlet line, the first passage outlet of described cooler connects the entrance of described 4th knockout drum by the 3rd choke valve, the gaseous phase outlet of the 4th knockout drum connects described level Four entrance; The liquid-phase outlet of the 4th knockout drum connects the 3rd knockout drum by first throttle valve, the gaseous phase outlet of the 3rd knockout drum connects described three grades of entrances, the liquid-phase outlet of the 3rd knockout drum connects subcooler by second throttle, the liquid-phase outlet of subcooler connects the first passage of heat exchanger, the gaseous phase outlet of subcooler connects the entrance of the second knockout drum, and the outlet of the second knockout drum connects described secondary inlet;
Also be connected with the first anti-surge line between described outlet line and described first knockout drum, be connected with the 3rd anti-surge line between described outlet line and described 3rd knockout drum, between described outlet line and described second knockout drum, be also connected with the second anti-surge line; The 4th anti-surge line is connected with between described outlet line and described 4th knockout drum.
Described compressor can be propylene compressor or ammonia compressor.
Described compressor can be turbocompressor, such as steam turbine compressor; Also can be mechanical compressor or other compressor.
Compared with prior art, suction port of compressor is designed to multistage by the utility model, multistage flash evaporation separation is carried out to the liquid phase refrigerant that compressor is sent simultaneously, gas phase after separation returns in compressor from the entrance of correspondence, both the temperature by reducing compressor gas reduces the volume of gas, reduces the work done during compression of compressor; Suitably can reduce again the load of subcooler simultaneously, reduce the size of subcooler, reduce an investment cost of refrigeration system, suitably reduce the outlet pressure of compressor simultaneously, whole refrigeration system can be made more energy-conservation, energy consumption about 42.6% can be saved.
Accompanying drawing explanation
Fig. 1 and Fig. 2 is the schematic diagram of the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
As depicted in figs. 1 and 2, this refrigeration system comprises:
Compressor 3, for compression refrigeration medium, the refrigerant in the present embodiment is propylene.The compressor used in the present embodiment is steam-powered turbocompressor, as shown in Figure 1.Also ammonia compressor 2 can be used, as shown in Figure 2.
Compressor increases progressively direction along pressure and is provided with one-level entrance a, secondary inlet b, three grades of entrance c and level Four entrance d successively.
Knockout drum comprises the first knockout drum 1, second knockout drum 7, the 3rd knockout drum 8 and the 4th knockout drum 5.
Wherein, the entrance of the first knockout drum 1 connects the one-level entrance a of the outlet connection compressor of heat exchanger 9 refrigerant return line 12, first knockout drum 1.
The outlet of compressor connects the first passage entrance of cooler 4 by outlet line 13, the first passage outlet of cooler 4 connects the entrance of the 4th knockout drum by the 3rd choke valve 16, and the gaseous phase outlet of the 4th knockout drum connects level Four entrance d; The liquid-phase outlet of the 4th knockout drum connects the 3rd knockout drum 8 by first throttle valve 15, the gaseous phase outlet of the 3rd knockout drum 8 connects described three grades of entrance c, the liquid-phase outlet of the 3rd knockout drum 8 connects subcooler 6 by second throttle 14, the liquid-phase outlet of subcooler 6 connects the first passage of heat exchanger, the gaseous phase outlet of subcooler 6 connects the entrance of the second knockout drum 7, and the outlet of the second knockout drum 7 connects secondary inlet (b).
The first anti-surge line 31 is connected with between outlet line 13 and the first knockout drum 1, the 3rd anti-surge line 33 is connected with between outlet line 13 and the 3rd knockout drum 8, also be connected with the second anti-surge line 32 between outlet line 13 and the second knockout drum 7, between outlet line 13 and the 4th knockout drum 5, be connected with the 4th anti-surge line 34.
Fig. 1 uses propylene compressor 3, Fig. 2 to use ammonia compressor 2

Claims (3)

1. a refrigeration system, comprise compressor (3) and knockout drum, it is characterized in that: described compressor increases progressively direction along pressure and is provided with one-level entrance (a), secondary inlet (b), three grades of entrances (c) and level Four entrance (d) successively; Described knockout drum comprises the first knockout drum (1), the second knockout drum (7), the 3rd knockout drum (8) and the 4th knockout drum (5);
Wherein, the entrance of described first knockout drum (1) connects refrigerant return line (12) outlet, and the outlet of the first knockout drum (1) connects one-level entrance (a) of described compressor;
The outlet of described compressor connects the first passage entrance of cooler (4) by outlet line (13), the first passage outlet of described cooler (4) connects the entrance of described 4th knockout drum by the 3rd choke valve (16), the gaseous phase outlet of the 4th knockout drum connects described level Four entrance (d); The liquid-phase outlet of the 4th knockout drum connects the 3rd knockout drum (8) by first throttle valve (15), the gaseous phase outlet of the 3rd knockout drum (8) connects described three grades of entrances (c), the liquid-phase outlet of the 3rd knockout drum (8) connects subcooler (6) by second throttle (14), the liquid-phase outlet of subcooler (6) connects the first passage of heat exchanger, the gaseous phase outlet of subcooler (6) connects the entrance of the second knockout drum (7), and the outlet of the second knockout drum (7) connects described secondary inlet (b);
The first anti-surge line (31) is also connected with between described outlet line (13) and described first knockout drum (1), be connected with the 3rd anti-surge line (33) between described outlet line (13) and described 3rd knockout drum (8), between described outlet line (13) and described second knockout drum (7), be also connected with the second anti-surge line (32); The 4th anti-surge line (34) is connected with between described outlet line (13) and described 4th knockout drum (5).
2. refrigeration system according to claim 1, is characterized in that described compressor (3) is for propylene compressor or ammonia compressor.
3. refrigeration system according to claim 1, is characterized in that described compressor (3) is for turbine driving compressor or motor-driven compressor.
CN201420778889.1U 2014-12-10 2014-12-10 A kind of refrigeration system Active CN204388412U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420778889.1U CN204388412U (en) 2014-12-10 2014-12-10 A kind of refrigeration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420778889.1U CN204388412U (en) 2014-12-10 2014-12-10 A kind of refrigeration system

Publications (1)

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CN204388412U true CN204388412U (en) 2015-06-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106403358A (en) * 2016-08-30 2017-02-15 内蒙古博大实地化学有限公司 Ammonia synthesis device refrigeration system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106403358A (en) * 2016-08-30 2017-02-15 内蒙古博大实地化学有限公司 Ammonia synthesis device refrigeration system

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