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Low temperature immersed pump system feeding liquefied natural gas (LNG)

A submersible pump and low-temperature technology, which is applied to parts, pumps, and pump devices of elastic fluid pumping devices, can solve problems affecting sealing, heat dissipation, etc., reduce leakage, reduce heat leakage, and ensure accuracy Effect

Active Publication Date: 2016-01-20
JIANGSU DUBLE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The structure of the low temperature liquefied gas submersible pump in the existing technology is mainly the nozzle structure, which needs to be improved. The structure of the submersible pump is mainly the nozzle, but in fact the nozzle may be a more important aspect that dissipates heat and affects the seal.

Method used

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  • Low temperature immersed pump system feeding liquefied natural gas (LNG)
  • Low temperature immersed pump system feeding liquefied natural gas (LNG)
  • Low temperature immersed pump system feeding liquefied natural gas (LNG)

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Experimental program
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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] As shown in the figure, a low-temperature liquefied gas submersible pump includes a main cylinder for ensuring a liquid seal, the upper end of the main cylinder is sealed by a flange, and a submersible pump 2 is fixed inside the main cylinder 1. The outlet pipe 2 of the submersible pump extends outward through the flange 3; the side wall of the main cylinder is provided with a liquid phase inlet 5 and a gas phase outlet 11. The main cylinder body 1, the upper end of the main cylinder body is sealed by the flange 2, the submersible pump is fixed in the main cylinder body, the upper end of the main cylinder body is provided with a flange and an upper cover 3 covering the flange, and the submersible pump is composed of The inner tube 8 is wrapped, and the outlet pipe 9 of the submersible pump 4 extends upward through the flange and the upper cover; the side wall of...

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Abstract

The invention provides a low temperature immersed pump pool for liquefied natural gas (LNG). The low temperature immersed pump pool comprises a main cylinder body used for ensuring liquid seal. The upper end of the main cylinder body is sealed through a flange. An immersed pump is fixed in the main cylinder body. The upper end of the main cylinder body is provided with the flange and an upper seal cover covering the flange. The immersed pump is wrapped with an inner tire. A liquid outlet pipe of the immersed pump penetrates through the flange and the upper seal cover to extend upwards. The side wall of the main cylinder body is provided with a liquid phase inlet and a gas phase outlet. A whole part between the main cylinder body and the inner tire is a vacuum thermal insulation cavity. S304 stainless steel is adopted for the material of the inner tire and a shell of the main cylinder body. The inner tire is wrapped with aluminum foil fiberglass material and contains adsorption purge gas material.

Description

technical field [0001] The invention belongs to the field of pressure vessels, and in particular relates to a submersible pump or submersible pump pool for low-temperature liquefied gas. This submersible pump can be used for filling LNG. Background technique [0002] LNG is condensed into a liquid by cooling gaseous natural gas at normal pressure to -162°C. Natural gas liquefaction can greatly save storage and transportation space and cost, and has the characteristics of large calorific value and high performance. In the LNG filling station equipment, the submersible pump pool is an important power device for filling the low-temperature liquid LNG from the storage tank into the pipeline of the liquid injection machine. How to effectively reduce heat dissipation and provide sealing during the filling process is the key to evaluating the quality of the LNG submersible pump pool. [0003] The structure of the submersible pump for cryogenic liquefied gas in the prior art is m...

Claims

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Application Information

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IPC IPC(8): F04D13/08F04D29/08F04D29/58F04D29/40F17C7/02
Inventor 黄鹏黄莉郭飞顾晓华翟继军张国超
Owner JIANGSU DUBLE ENG
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