Efficient compact glycol dehydration system and method for natural gas

A natural gas, compact technology, applied in the field of high-efficiency and compact natural gas glycol dehydration system, can solve the problems of high installation requirements, poor system reliability, and high maintenance costs, and achieve flexible installation and layout, small footprint and light weight. Effect

Active Publication Date: 2020-07-28
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the supergravity machine is running, the internal rotor rotates at high speed, the daily maintenance cost of the dynamic equipment is high, and the system reliability is poor, especially under the condition of large processing capacity, the equipment has high requirements for the installation of supports. These shortcomings limit its application Field application

Method used

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  • Efficient compact glycol dehydration system and method for natural gas
  • Efficient compact glycol dehydration system and method for natural gas
  • Efficient compact glycol dehydration system and method for natural gas

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specific Embodiment

[0074] see figure 1 As shown, the present invention proposes a high-efficiency and compact natural gas glycol dehydration process, including a filter separator bottom flow valve 1, a filter separator 2, a tubular gas-liquid contact absorber 3, a triethylene glycol condenser 4, and a glycol pump 5. Natural gas / lean glycol heat exchanger 6, demister 7, demister underflow valve 8, lean glycol storage tank 9, lean / rich glycol heat exchanger 10, tubular gas-liquid contact desorber 11, Condenser 12, three-phase separator 13, stripping agent pump 14, first stop valve 15, stripping agent injection stop valve 16, coalescer 17, coalescer drain valve 18, first stripping agent dryer 19 , The second stripping agent dryer 20, the stripping agent heater 21, the reboiler 22, the glycol filter 23, the flash tank 24, the second stop valve 25.

[0075] The bottom outlet of the filter separator 2 is connected to the filter separator underflow valve 1, the outlet of the filter separator underflow...

Embodiment 1

[0103] Use the above-mentioned device and process to remove gaseous water in natural gas with triethylene glycol:

[0104] The pressure of the natural gas entering the system is 7MPa, the volume ratio of the triethylene glycol lean liquid to the natural gas to be treated is 1:10000, the volume ratio of the amount of stripping agent to the amount of triethylene glycol rich liquid is 0.15:1, and the stripping agent is positive Heptane, TEG condenser temperature is 35°C, natural gas flow rate in the tubular gas-liquid contact absorber is 12m / s, triethylene glycol lean liquid atomized droplet D32 particle size is 100μm, tube gas-liquid contact desorption The gas phase velocity in the vessel is 12m / s, the particle size of the atomized droplet D32 rich in triethylene glycol rich liquid is 100μm, and the temperature of the reboiler is 204°C; under these process conditions, the purity of the regenerated triethylene glycol poor liquid reaches 99.99% wt%, the water dew point of natural ...

Embodiment 2

[0106] As shown in Example 1, other conditions remain unchanged, the natural gas flow rate in the tubular gas-liquid contact absorber is 20m / s, the particle size of the triethylene glycol lean liquid atomized droplet D32 is 60 μm, and the gas-liquid contact desorber in the tubular gas-liquid contact desorber The gas phase velocity is 20m / s, and the particle size of the atomized droplet D32 of the triethylene glycol rich liquid is 60μm. Using this process condition, the purity of the regenerated triethylene glycol lean liquid reaches 99.99wt%, and the dew point of natural gas water after dehydration reaches - 70°C.

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Abstract

The invention discloses an efficient compact tubular glycol dehydration system and method for natural gas. The dehydration system and method are applicable to an offshore platform. The system comprises an underflow valve of a filter separator, the filter separator, a tubular gas-liquid contact absorber, a triethylene glycol condenser, a glycol pump, a natural gas/lean glycol heat exchanger, a demister, an underflow valve of a demister, a lean glycol storage tank, a lean/rich glycol heat exchanger, a tubular gas-liquid contact desorber, a condenser, a three-phase separator, a stripping agent pump, a coalescer, a drain valve of the coalescer, a stripping agent dryer, a stripping agent heater, a reboiler, a glycol filter and a flash tank. According to the invention, a triethylene glycol contact absorption dehydration part for natural gas adopts the tubular gas-liquid contact absorber, and a triethylene glycol regeneration part adopts a tubular rich ethylene glycol desorber, so the height,the volume and the weight of equipment can be reduced; a triethylene glycol barren solution is used as an absorbent, so the dew point of water at an outlet of natural gas having undergone water absorption treatment in an absorption system can be reduced to -60 DEG C or below; the circulation volume and loss of triethylene glycol are reduced, operation and running cost is greatly saved, the spaceoccupation of an offshore platform is effectively reduced, and the treatment requirements of long-distance transportation and liquefied natural gas on space-limited occasions such as an offshore platform can be met.

Description

technical field [0001] The invention relates to a natural gas treatment and processing technology, in particular to an efficient and compact natural gas glycol dehydration system and method. Background technique [0002] With the increasing demand for energy in today's society and the gradual enhancement of people's awareness of environmental protection, the development and utilization of natural gas as a clean energy source will receive more and more attention. However, with the gradual depletion of onshore oil and gas resources, the development of offshore oil and gas fields will gradually become a strategic replacement hotspot. Although natural gas produced from offshore gas fields is generally transported to onshore terminals through pipelines for purification, in order to prevent pipelines from being blocked by hydrate formation and corrosion damage to pipelines caused by the combination of water and acid gases, it is often necessary to clean them on offshore platforms ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10B01D5/00B01D53/26B01D53/14B01D3/34B01D3/32
CPCC10L3/106C10L3/107B01D5/003B01D53/261B01D53/1425B01D3/322B01D3/343B01D2252/202
Inventor 孔令真陈家庆兰天孙欢
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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