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A bog processing method for lng cars or ships

A treatment method and ship technology, applied in the direction of container discharge, fluid treatment, container filling method, etc., can solve the problems of natural gas accumulation, hidden dangers of safety accidents, etc., and achieve the effects of protecting the environment, reducing pollution, and simple structure

Active Publication Date: 2020-09-11
苏州先创流体控制技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is an LNG vehicle parked in an underground garage or other closed space, the discharge of BOG will lead to the accumulation of natural gas in a closed or semi-closed space, which will cause potential safety accidents
Therefore, the application of LNG in private cars has been greatly limited.

Method used

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  • A bog processing method for lng cars or ships
  • A bog processing method for lng cars or ships
  • A bog processing method for lng cars or ships

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of BOG processing method of LNG automobile or ship of the present invention, such as figure 1 shown, including the following steps:

[0029] When the engine 1 is in the off state and the pressure value in the LNG storage tank 2 exceeds the first set value, the control module sends an instruction to connect the gas phase end passage 3 of the LNG storage tank 2, so that the BOG gas in the LNG storage tank 2 can enter Engine 1, at the same time close the passage of liquid-phase natural gas entering the engine; and the control module sends an instruction to start the engine 1, the engine 1 enters an idle state, and charges the battery pack 4 by consuming BOG gas;

[0030] The BOG gas is continuously consumed until the pressure in the LNG storage tank 2 is lower than the second set value, and the control module sends an instruction to shut down the engine 1 .

[0031] Wherein, the overcharge protection is activated after the battery pack 4 is fully charged, and the e...

Embodiment 2

[0047] The invention also discloses a BOG processing system for LNG vehicles or ships, such as figure 2 and image 3 As shown, it includes the LNG storage tank 2, the main passage 6, the engine 1 and the battery pack 4, and also includes the pressure sensor 5 arranged at the gas phase outlet or channel of the LNG storage tank 2, and the mechanical pressure sensor arranged on the main passage 6. Type reversing valve 11, the mechanical pressure sensing reversing valve 11 is respectively connected with the gas phase channel and the liquid phase channel of the LNG storage tank 2 and shifts between them; The reversing valve 11 is connected with the LNG storage tank 2 , and the other end is connected with the engine 1 , and the engine 1 is connected with the battery pack 4 . A pressure-stabilizing valve 8 , a buffer tank 9 and a solenoid valve 10 are sequentially provided between the mechanical pressure-sensing reversing valve 11 and the engine 1 ; the pressure sensor 5 and the en...

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Abstract

The invention discloses a BOG processing method of an LNG automobile or a ship. The BOG processing method comprises the following steps that when an engine is in a closed state and a pressure value inan LNG storage tank exceeds a first set value, a control module sends an instruction to communicate with a gas-phase end passage of the LNG storage tank, so that BOG gas in the LNG storage tank can enter the engine, the control module sends the instruction to start the engine, the engine enters an idling state, and the BOG gas is consumed for charging a battery pack. On one hand, the BOG gas is used for charging the automobile or the ship, the energy utilization efficiency is improved, and the method is particularly suitable for a hybrid automobile; and on the other hand, the problem of discharging of BOG is solved, and safety accidents caused by accumulation of the natural gas in a closed or semi-closed space are prevented; and in addition, emission of greenhouse gases such as natural gas is reduced, pollution can be reduced, and the environment can be protected.

Description

technical field [0001] The invention relates to the technical field of LNG vehicles, in particular to a BOG processing method for LNG vehicles or ships. Background technique [0002] LNG is a clean energy that is encouraged by the state. In the field of transportation, it is mainly used as fuel for LNG heavy trucks, LNG ships, LNG buses, other LNG commuter vehicles and construction machinery to replace traditional fossil fuels such as diesel. These vehicles have a characteristic that they are in operation most of the time, and LNG is always being consumed, so BOG (boil-off gas, boil-off gas) is little or almost non-existent (BOG refers to the gas evaporated by LNG absorbing ambient heat) . [0003] If BOG cannot be processed or consumed in time, the pressure of the storage tank will continue to rise, and when it exceeds the setting value of the primary safety valve, the safety valve will open to discharge part of the gaseous natural gas until the pressure of the storage tan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C13/00F17C13/02F17C13/04F02M21/02F02B63/04
CPCF02B63/04F02M21/0215F17C13/00F17C13/002F17C13/025F17C13/04F17C2221/033F17C2260/044F17C2265/03Y02T10/30
Inventor 白慧星王鑫
Owner 苏州先创流体控制技术有限公司
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