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Method and apparatus for preparing solid natural gas

A natural gas and solid technology, applied in the direction of solid fuel, gas fuel, petroleum industry, etc., can solve the problems of complex natural gas hydrate preparation and transportation equipment, slow accumulation of large-volume hydrate, and low efficiency of hydrate preparation process, and achieve Save high-pressure natural gas compressors, reduce energy consumption, and promote rapid production

Inactive Publication Date: 2005-06-01
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0003] 1. The accumulation speed of large-volume hydrate is slow, and the efficiency of hydrate preparation process is low
[0004] 2. The preparation and transportation devices of natural gas hydrate are relatively complicated
However, in order to offset the large amount of heat of reaction released during the formation of hydrates, a large amount of liquid nitrogen must be added, resulting in a significant increase in production costs

Method used

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  • Method and apparatus for preparing solid natural gas
  • Method and apparatus for preparing solid natural gas
  • Method and apparatus for preparing solid natural gas

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with accompanying drawing. However, it does not limit the scope of rights of the present invention.

[0046] First start the high-pressure water pump 6, and pump the water added with the additive into the tube side of the reactor 3. When the water level at the top of the tower exceeds the partition plate 16 and reaches the specified level, open the drain valve 4 at the outlet of the bypass pipe, adjust the opening degree of the valve and the displacement of the high-pressure water pump 6, so that the water passes through the drain valve 4 and the flash degassing tank 7. The filter 8 and the water tank 10 form a stable water cycle; then start the refrigeration unit to supply chilled water to the cold row in the water tank 10 and the flash tank 7, and control the water temperature in the entire reactor 3 within the required range . The preferred temperature is about 10°C lower than the equilibrium temp...

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Abstract

The present invention is solid natural gas preparing process and apparatus with easy implementation, low cost and high efficiency. The technological scheme includes spraying high pressure natural gas via nozzles into low temperature and high pressure water flow in the bottom of the reactor to form fine bubbles and react with water; setting cold trap pipe inside the reactor to remove the creating heat of hydrate and create pressure, temperature and heat transferring conditions for creating hydrate inside the cold trap pipe; forming gas cap in the top of the tower with the un-reacted gas to maintain sufficient pressure; forming flowing slurry with the hydrate and excessive water and making the slurry enter the flash evaporator for gas-liquid separation; filtering the automatically concentrated slurry in a filtering machine to obtain 'dry' hydrate product; and circulating with low temperature water for continuous and efficient reaction.

Description

technical field [0001] The invention relates to a method and device capable of continuously and efficiently preparing solid natural gas with low cost, belonging to the field of natural gas storage and transportation. Background technique [0002] Solid natural gas technology (GTS) is to convert natural gas from gaseous state into solid hydrate form, making it easy to transport and re-converted into gaseous natural gas for utilization. Because it significantly reduces the cost of natural gas storage and transportation, and improves the economy and safety of natural gas storage and transportation, it has received general attention from the industry. Compared with other forms of storage and transportation of natural gas, such as pipeline transportation, CNG (compressed natural gas) technology, and LNG (liquefied natural gas) technology, solidified natural gas technology has unique advantages, mainly in: solid natural gas storage capacity (volume ratio: 150 ~180); gas storage c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10C10L7/00
Inventor 黄林基张建文
Owner SOUTHWEST PETROLEUM UNIV
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