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Ejector condenser, device and method for treating boil-off gas of liquefied natural gas

A technology of liquefied natural gas and condenser, which is applied in the direction of cold treatment separation, refrigeration and liquefaction, evaporator/condenser, etc. It can solve the problems of high cost of gas compressor, high energy consumption of gas compressor, and high pressure boost performance of gas compressor , to achieve the effect of reducing cost and energy consumption, reducing floor space, and reducing processing costs

Active Publication Date: 2022-05-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has relatively high requirements on the pressurization performance of the gas compressor, and usually requires a gas compressor with an exhaust pressure greater than or equal to 0.77MPa. The high energy consumption of the machine leads to a significant increase in the processing cost of the boil-off gas of liquefied natural gas

Method used

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  • Ejector condenser, device and method for treating boil-off gas of liquefied natural gas
  • Ejector condenser, device and method for treating boil-off gas of liquefied natural gas
  • Ejector condenser, device and method for treating boil-off gas of liquefied natural gas

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Experimental program
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Effect test

Embodiment 1

[0135] Embodiment 1 provides an ejection condenser. See figure 1 , the ejection condenser includes a body, an ejection zone 41 and a condensation zone 42 arranged in the body; the body corresponding to the ejection zone 41 includes: a receiving section 411, a mixing section 412, and a diffusing section 413 connected in sequence; The interior of the section 411 is provided with a nozzle 4111; the air inlet 401 of the ejection condenser and the liquid inlet 402 of the ejection condenser are located on both sides of the nozzle 4111 respectively; the outlet 403 of the ejection condenser 4 is located in the condensation zone 41 One end of the corresponding body; a condensing sheet 421 is provided in the condensation area 42 , and the condensing sheet 421 is a helical condensing sheet.

Embodiment 2

[0137] Embodiment 2 provides an apparatus for processing boil-off gas of liquefied natural gas. See Figure 8 , the device includes: LNG storage tank 1, gas compressor 2, first desuperheater 3, ejection condenser 4, first gas-liquid separation tank 5, second desuperheater 6, and second gas-liquid separation Tank 7; wherein, the LNG storage tank 1 is provided with the storage tank gas outlet pipeline X and the storage tank liquid outlet pipeline Y; the LNG storage tank 1, the storage tank gas outlet pipeline X, the second desuperheater 6, the gas compressor 2, The first desuperheater 3 and the feed port 501 of the first gas-liquid separation tank are connected in turn, and the air outlet 502 of the first gas-liquid separation tank is connected with the air inlet 401 of the ejection condenser in sequence; The discharge port 403 is communicated with the feed port 701 of the second gas-liquid separation tank, the gas outlet 702 of the second gas-liquid separation tank is communic...

Embodiment 3

[0139] Embodiment 3 provides an apparatus for processing boil-off gas of liquefied natural gas. please continue Figure 8 , the device includes: LNG storage tank 1, gas compressor 2, first desuperheater 3, ejection condenser 4, first gas-liquid separation tank 5, second desuperheater 6, second gas-liquid separation tank 7, and an automatic control system; wherein, the LNG storage tank 1 is provided with a storage tank gas outlet pipeline X and a storage tank liquid outlet pipeline Y; the LNG storage tank 1, the storage tank gas outlet pipeline X, the second desuperheater 6, the gas The compressor 2, the first desuperheater 3, and the feed port 501 of the first gas-liquid separation tank are connected in sequence, and the air outlet 502 of the first gas-liquid separation tank is communicated with the air inlet 401 of the ejection condenser; The discharge port 403 of the condenser is communicated with the feed port 701 of the second gas-liquid separation tank, the gas outlet 70...

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Abstract

The invention belongs to the technical field of petrochemical material storage, and relates to an ejector condenser, a device and a method for processing boil-off gas of liquefied natural gas. Wherein, the ejection condenser includes a main body, an ejection area (41) and a condensation area (42) arranged in the main body, and an ejection condenser (4) arranged on the body corresponding to the ejection area (41). The air inlet (401) and the liquid inlet (402) of the ejection condenser (4), and the outlet of the ejection condenser (4) provided on the body corresponding to the condensation zone (42) (403); along the axial direction of the body (42) corresponding to the condensation zone, a condensation sheet (421) is provided in the condensation zone (42). The ejection condenser provided by the present invention can initially mix the ejection fluid and the working fluid through the ejection area, reduce the temperature of the ejection fluid, and further mix and condense through the condensing sheets in the condensation area, thereby further reducing the ejection temperature. temperature of the fluid.

Description

technical field [0001] The invention belongs to the technical field of petrochemical material storage, and more particularly relates to an ejector condenser, a device and a method for processing boil-off gas of liquefied natural gas. Background technique [0002] Liquefied Natural Gas (LNG for short) is natural gas that is compressed and cooled to its boiling point (-161.5°C) and becomes liquid. Usually, liquefied natural gas is stored in a storage tank at -161.5°C and about 0.1MPa. The main component of LNG is methane, which is an efficient and clean energy source with high calorific value and low combustion pollution. Usually, special ships or tankers are used to transport LNG, and the LNG is gasified when used. Since the 1970s, world LNG production and trade have increased rapidly. As my country pays more and more attention to the environment, more and more liquefied natural gas is applied to all aspects of society. [0003] At present, various regions in China are con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J1/02F25B39/04
CPCF25J1/0202F25B39/04F25J2210/62F25B2339/04F17C2265/03F17C2223/0161F17C2221/033F04F5/04
Inventor 李凤奇李明张健汤雅雯多志丽
Owner CHINA PETROLEUM & CHEM CORP