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A system and method for loading liquefied petroleum gas based on single point mooring

A liquefied petroleum gas and single-point mooring technology, which is applied in container filling methods, equipment loaded into pressure vessels, gas/liquid distribution and storage, etc., can solve the problems of difficult site selection, long construction period, and high cost. Achieve the effects of low investment, short construction period, and reduced process energy consumption

Active Publication Date: 2015-08-12
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the fully cooled LPG carrier, due to its large storage capacity, the ship is usually 200-300 meters long, and the full-load draft is 12-16 meters, which makes it difficult to select a dock site, high cost, and long construction period

Method used

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  • A system and method for loading liquefied petroleum gas based on single point mooring

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Embodiment Construction

[0046] All features disclosed in this specification, or all disclosed steps in a method or process, may be combined in any way except mutually exclusive features and / or steps.

[0047] Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

[0048] like figure 1 As shown, the LPG ship loading system based on single-point mooring includes LPG cryogenic storage tank 1, LPG cryogenic pump 2, BOG recondenser 3, LPG heater 4, gas-phase subsea pipeline 5, liquid-phase subsea pipeline 6, single-point Mooring device 7, primary compressor 8, secondary compressor 9, primary gas-liquid separator 10, secondary gas-liquid separator 11, tertiary gas-liquid separator 12, cryopump 13, cooler 14, Cold L...

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Abstract

The invention discloses a ship loading system of LPG (Liquefied Petroleum Gas)-based on single point mooring. The ship loading system comprises a shore base LPG freezer, a single point mooring system, a LPG refreezing device and an all-cooling LPG transport ship, wherein the shore base LPG freezer is connected with the LPG refreezing device through the single point mooring system, and the LPG refreezing device is connected with the all-cooling LPG transport ship. The invention further discloses a ship loading method which comprises the following steps: heating low-temperature LPG stored in the shore base LPG freezer through a heater; transmitting the LPG to the refreezing device through the single point mooring system; carrying out refrigeration on the LPG to a saturation temperature under normal pressure in the refreezing device and transmitting the LPG to the all-cooling LPG transport ship through an LPG low temperature pump. Compared with a traditional dock loading technique, the ship loading system and method of LPG based on the single point mooring is suitable for being used in situations that an area lack of a natural port and a port plan is not easy to change, the investment is low, the construction period is short and equipment can be recycled when energy is exhausted.

Description

technical field [0001] The invention relates to the technical field of liquefied petroleum gas (Liquefied Petroleum Gas, LPG for short) loading, in particular to a single-point mooring-based liquefied petroleum gas loading system and method. Background technique [0002] Pressurizing or cooling LPG to liquefy it, it becomes liquefied petroleum gas (LPG). The volume of LPG is about 1 / 250 of the volume of LPG of the same mass, which has the advantages of flexible transportation and high storage efficiency. LPG sources include by-products produced during crude oil refining, or associated products in the process of oil and natural gas extraction. It has the advantages of cleanliness, environmental protection and high combustion calorific value. [0003] LPG storage at low temperature and atmospheric pressure means that the storage state of LPG is at atmospheric pressure and at saturation temperature. The saturation temperature of propane under normal pressure is -42°C, the satu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C5/02
Inventor 廖勇刘家洪冼祥发陆永康蒲黎明谌天兵钟志良苏理林康智白宇恒黄勇蒋志明田东民张雷果
Owner BC P INC CHINA NAT PETROLEUM CORP
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