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LNG liquid adding system

A liquid phase and submersible pump technology, which is applied in the field of LNG dosing system, can solve problems such as affecting the normal startup of submersible pumps, and achieve the effect of reducing the impact and improving the efficiency.

Active Publication Date: 2016-02-10
ENRIC (LANGFANG) ENERGY EQUIP INTEGRATION CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is: in the LNG filling system of the existing vertical submersible pump, the height of the liquid level in the pump pool will affect whether the submersible pump can start normally

Method used

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Embodiment Construction

[0029] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the invention is capable of various changes in different embodiments without departing from the scope of the invention, and that the description and illustrations therein are illustrative in nature and not limiting. this invention.

[0030] Such as figure 1 As shown, the embodiment of the present invention provides an LNG filling system, including a cryogenic storage tank 1 , a liquid phase pipeline 2 , a submersible pump system 3 , a liquid outlet pipeline 4 and a liquid filling machine 5 . The cryogenic storage tank 1 includes an outer storage tank 11 and an inner storage tank 12, and the inner storage tank 12 stores cryogenic liquid (LNG). The cryogenic storage tank 1 is fixed by a saddle-type bracket 13 . The figure shows a horizontal double-layer storage tank structure as an example, but it is n...

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Abstract

The invention provides an LNG liquid adding system comprising a low temperature storage pot, a liquid phase pipeline, an immersed pump system, a liquid discharge pipeline and a liquid adding machine. The immersed pump system includes a pump tank and an immersed pump. The pump tank includes a sealing cover, a shell and an inner container. The immersed pump is installed in the inner container. The pump tank and the immersed pump are both installed horizontally. The liquid phase pipeline is connected between the low temperature storage pot and the pump tank. The pump tank is arranged on the lower part of the low temperature storage pot. The low temperature storage pot is communicated with LNG liquid in the pump tank. The immersed pump system conveys the LNG liquid to the liquid adding machine through the liquid discharge pipeline. The LNG liquid in the low temperature storage pot is communicated with the LNG liquid in the pump tank. The immersed pump is immersed in the LNG liquid in the pump tank all the time so that the immersed pump can be started without pre-cooling. Meanwhile, net positive suction head of the immersed pump can be satisfied completely, so that influence on the immersed pump due to cavitation erosion can be reduced and LNG addition efficiency is increased.

Description

technical field [0001] The invention relates to a liquefied natural gas (LNG) filling system, in particular to an LNG filling system that can work smoothly without venting. Background technique [0002] The LNG filling system uses the submersible pump as the power source and is widely used in traditional LNG filling stations. Usually, submersible pumps are used on skid-mounted LNG gas filling stations to complete the functions of unloading tankers and filling LNG vehicles with LNG as fuel through liquid filling machines. In this case, according to submersible liquid The structure of the pump pool and the submersible pump itself, the submersible pump is vertically installed in the submersible pump pool. [0003] The boiling point of LNG at atmospheric pressure is about -162°C. The heat from the external environment will be transferred to the inside of the submersible pump pool to vaporize the LNG, and at the same time cause the internal pressure of the pump pool to increase ...

Claims

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Application Information

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IPC IPC(8): F17C5/02
Inventor 李怀恩
Owner ENRIC (LANGFANG) ENERGY EQUIP INTEGRATION CO LTD
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