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Propylene refrigeration consumption reduction method and system

A technology of propylene refrigeration and propylene refrigerant, which is applied in the field of propylene refrigeration consumption reduction methods and systems, can solve problems such as lack of good engineering practice, and achieve the effects of reducing land occupation and investment, and reducing pressure ratio.

Active Publication Date: 2022-01-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, it is widely used in electric power, chemical fertilizer and other fields, but there is no good engineering practice in the field of petrochemical industry

Method used

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  • Propylene refrigeration consumption reduction method and system
  • Propylene refrigeration consumption reduction method and system

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0038] According to a preferred embodiment of the present invention, the method also includes the steps of:

[0039] S1: storing the propylene refrigerant cooled by the chilled water in the collection buffer tank;

[0040] S2: Divide the propylene refrigerant stored in the collection buffer tank into two parts; one part provides cooling capacity for the user of the highest temperature propylene refrigerant and partially vaporizes, and sends the partially vaporized propylene refrigerant into the The highest temperature level suction tank; the other part is directly sent into the highest temperature level suction tank;

[0041] S3: The propylene refrigerant sucked into the tank at the highest temperature is subjected to gas-liquid separation to obtain liquid-phase propylene refrigerant and gas-phase propylene refrigerant; the liquid-phase propylene refrigerant is used for the next-level propylene refrigerant user Provide cooling and partially vaporize;

[0042]S4: Send the par...

Embodiment 1

[0054] This embodiment provides a propylene refrigeration consumption reduction system, such as figure 2 As shown, the system includes a one-stage propylene refrigeration compressor K-501, a collection buffer tank D-500, a second-stage propylene refrigerant user (12°C) E-201, and a first-stage propylene refrigerant user (-40°C) E-101 , Two-stage suction tank D-502, one-stage suction tank D-501, lithium bromide refrigeration unit and cold recovery heat exchanger E-502;

[0055] The outlet of the first-stage propylene refrigeration compressor K-501 is connected to the propylene refrigerant inlet of the cold recovery heat exchanger E-502, and the propylene refrigerant outlet of the cold recovery heat exchanger E-502 is connected to the collection Buffer tank D-500 connection;

[0056] The chilled water outlet of the lithium bromide unit is connected to the chilled water inlet of the cold energy recovery heat exchanger E-502, and the chilled water inlet of the lithium bromide un...

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Abstract

The invention belongs to the technical field of propylene refrigeration, and discloses a propylene refrigeration consumption reduction method and system. The system comprises a multi-section propylene refrigeration compressor, a collection buffer tank, multiple stages of temperature-level propylene refrigerant users, multiple stages of suction tanks, a lithium bromide refrigeration unit and a cold energy recovery heat exchanger. The cold energy recovery heat exchanger is arranged between the multi-section propylene refrigeration compressor and the collection buffer tank. The lithium bromide unit is used for providing cold energy for the cold energy recovery heat exchanger; The number of sections of the multi-section propylene refrigeration compressor is at least one section smaller than that of the multiple stages of suction tanks, and the number of the multiple stages of suction tanks is the same as that of the multiple stages of temperature-level propylene refrigerant users. According to the propylene refrigeration consumption reduction method and system, an outlet gas phase of the propylene refrigeration compressors is cooled by using chilled water, and the pressure required by the tail section of the propylene refrigeration compressor is reduced, so that the pressure ratio of the propylene refrigeration compressor is reduced, and the number of the sections of the multi-section propylene refrigeration compressor is reduced by at least one section.

Description

technical field [0001] The invention belongs to the technical field of propylene refrigeration, and more specifically relates to a method and system for reducing consumption of propylene refrigeration. Background technique [0002] The propylene refrigeration system is one of the necessary refrigeration systems for the current low-temperature hydrocarbon recovery unit, which mainly provides the system with refrigerants at -40°C and above. The existing propylene refrigeration system is mainly composed of a refrigeration compressor, a propylene refrigerant cooler, and a propylene refrigerant collection tank. tank, and set up the cold energy recovery subsystem according to the system characteristics, such as figure 1 shown. [0003] At present, many application scenarios of propylene refrigeration compressors, such as ethylene plants and methanol-to-olefin plants, etc., use circulating water as the refrigerant source for gas-phase propylene condensation. Since the temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B25/02
CPCF25B25/02Y02P20/10
Inventor 刘罡吴翔陈静赵百仁王振维秦婷婷
Owner CHINA PETROLEUM & CHEM CORP
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