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Low-temperature liquid gas memory device and control method thereof

A storage device, liquefied gas technology, applied in gas/liquid distribution and storage, container filling method, container discharge method, etc. cost, reduce power consumption, optimize the effect of energy balance

Inactive Publication Date: 2009-07-29
CHINA NAT AIR SEPARATION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing equipment lacks a device for fully recovering the cold energy, which consumes a lot of energy and wastes energy. If the external cold energy can be recovered as the cooling energy for BOG liquefaction, it will not only reduce the power consumption during BOG liquefaction, but also reduce the external infusion Consumption of steam during gasification

Method used

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  • Low-temperature liquid gas memory device and control method thereof

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Embodiment Construction

[0011] Referring to Fig. 1, the present invention includes a receiving system 1, a storage system 2, an external transportation system 3, a BOG reliquefaction system 4 and a tail gas incineration system 5, and the BOG reliquefaction system 4 includes an ethylene compression system 7, a propylene refrigeration unit 8, an ethylene Condenser E-403, ethylene cooler E-401, condensate receiver V-403, ethylene flash tank V-404 and cold energy recovery device 6. Cold energy recovery device 6 is composed of ethylene precooler E-404 and ethylene economizer E-405. The feature of the present invention is that the cold energy recovery device 6 is set in parallel with the conventional reliquefaction flow path (composed of the propylene refrigeration unit 8, the ethylene condenser E-403, the ethylene cooler E-401, and the condensate receiver V-403) In this way, the refrigerating unit and the cold energy recovery device can be operated independently or simultaneously, which increases the flex...

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Abstract

The invention discloses a low temperature liquid gas storage device and a control method thereof. The low temperature liquid gas storage device comprises a receiving system, a storage system, an outside conveying system, a BOG reliquefaction system and a tail gas incineration system; wherein, the BOG reliquefaction system is internally provided with an ethylene compression system, a propylene refrigerating unit, an ethylene condenser, a condensate receiver, an ethylene flash tank and a cold energy recovery device. The device is characterized in that the cold energy recovery device includes an ethylene precooler and an ethylene energy-saving device, and is connected with other BOG reliquefaction fluid passages in parallel, and the ethylene precooler is connected with the ethylene energy-saving device in series. The device and the method thereof have the advantages of energy conservation and emission reduction, thus reducing the production cost.

Description

technical field [0001] The invention relates to a large-scale low-temperature liquefied hydrocarbon storage device and a control method thereof, belonging to the technical field of low-temperature engineering, in particular to a low-temperature liquefied gas storage device and a control method thereof. Background technique [0002] In the field of cryogenic engineering technology, cryogenic liquefied hydrocarbon storage devices are used to store cryogenic liquefied gases, such as LNG, LPG, ethylene, propylene, etc. The whole device is composed of receiving, storage, export, BOG reliquefaction, tail gas incineration and other systems. When the device is in operation, the external transportation system needs to release a large amount of cold energy in order to vaporize the cryogenic liquid. In the BOG reliquefaction system, it is necessary to provide cooling capacity to liquefy BOG. The existing equipment lacks a device for fully recovering the cold energy, which consumes a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C5/04F17C7/04F17C13/00
Inventor 李积杰林福粦张敏丹
Owner CHINA NAT AIR SEPARATION ENG CO LTD
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