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Natural gas dewaxing method and device

A natural gas and dewaxing technology, applied in separation methods, chemical instruments and methods, gas fuels, etc., can solve the problems of high operating costs, poor adaptability of dewaxing agents, and low dewaxing efficiency, and achieve a wide range of applications and adaptability. Strong strain and high dewaxing efficiency

Active Publication Date: 2021-08-13
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a natural gas dewaxing method and device, which overcomes the deficiencies of the prior art and can effectively solve the existing problems of poor adaptability of dewaxing agents, low dewaxing efficiency, and high operating costs in the natural gas dewaxing process

Method used

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  • Natural gas dewaxing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: as attached figure 1 As shown, the natural gas dewaxing method is carried out according to the following method: the first step, the waxy natural gas enters the feed gas filter separator 1 from the waxy natural gas pipeline 7, and removes the liquid droplets above 10 μm carried in the waxy natural gas, The liquid droplets removed from the waxy natural gas are discharged by the filter separator drain line 21, and the waxy natural gas that removes the liquid droplets enters the dewaxing absorption tower 2 from the absorption tower feed line 8; in the second step, No. 1 dewaxing agent The first dewaxing agent feed line 9 enters the dewaxing absorption tower 2, and the waxy natural gas in the dewaxing absorption tower 2 is in reverse contact with the No. 1 dewaxing agent for dewaxing. The drain line 18 is discharged to the condensate flash tank 6, and the dewaxed natural gas obtained after dewaxing enters the tower top liquid remover 3 through the absorption t...

Embodiment 2

[0018] Embodiment 2: as attached figure 1 As shown, as an optimization of the above example, the No. 1 dewaxing agent is liquid hydrocarbon, and the condensate separated in the cryogenic separator is the No. 2 dewaxing agent.

[0019] In the prior art, the dewaxing of natural gas adopts methods such as shutdown and cleaning, hydrocarbon injection for dissolution, and dewaxing agent washing. These methods generally have problems such as low dewaxing efficiency, poor effect, and high operating costs; in the present invention, there is no need to purchase or pull from the outside To transport liquid hydrocarbons, the liquid hydrocarbons extracted from the side line of the liquefied gas tower and the low-temperature natural gas condensate from the low-temperature separator 5 can be used as No. 1 dewaxing agent and No. 2 dewaxing agent respectively. The wax absorption tower 2 is in countercurrent contact with the waxy natural gas for mass transfer and heat transfer, and at the same...

Embodiment 3

[0020] Embodiment 3: as attached figure 1As shown, the device of the natural gas dewaxing method includes a feed gas filter separator 1, a dewaxing absorption tower 2, a top liquid remover 3, a dehydration and dehydrocarbon component 4, a low temperature separator 5, a condensate flash tank 6, and a raw material The inlet of gas filter separator 1 is fixedly connected with waxy natural gas pipeline 7, the top outlet of feed gas filter separator 1 and the lower inlet of dewaxing absorption tower 2 are fixedly connected with absorption tower feed pipeline 8, and the middle inlet of dewaxing absorption tower 2 The first dewaxing agent feed line 9 is fixedly connected, and the absorption tower exhaust pipeline 10 is fixedly connected between the top outlet of the dewaxing absorption tower 2 and the middle inlet of the tower top eliminator 3, and the top outlet of the tower top eliminator 3 is connected to the The upper inlet of the dehydration and dehydrocarbon component 4 is fixe...

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Abstract

The invention relates to the technical field of natural gas dewaxing, and relates to a natural gas dewaxing method and device. The natural gas dewaxing method is carried out according to the following method: No. 1 dewaxing agent enters the dewaxing absorption tower from the first dewaxing agent feeding pipeline The condensate separated in the low-temperature separator enters the dewaxing absorption tower through the second dewaxing agent feed line, and the device of the natural gas dewaxing method includes a feed gas filter separator, a dewaxing absorption tower, a top liquid remover, Dehydration and dehydrocarbon components, cryogenic separator, condensate flash tank. The invention has a reasonable and compact structure and is easy to use. It uses natural gas low-temperature condensate and liquid hydrocarbon extracted from the liquefied gas tower as a dewaxing agent, and uses the principle of absorption and analysis to dewax the waxy natural gas. After dewaxing, the natural gas can be dewaxed. The wax content in the oil is reduced to zero, which can effectively avoid wax plugging in subsequent process equipment. It has the characteristics of high dewaxing efficiency, low operating cost, strong adaptability, wide application range and flexible operation.

Description

technical field [0001] The invention relates to the technical field of natural gas dewaxing, and relates to a natural gas dewaxing method and device. Background technique [0002] As a clean and efficient energy, natural gas can not only optimize the energy structure and alleviate the contradiction between supply and demand, but also play a very important role in improving the quality of the city, improving the environment, improving the quality of life of the people and achieving sustainable development. Before the natural gas extracted from the gas field is input into the product gas pipeline network, it usually needs to undergo dehydrogenation and dehydration treatment, and at the same time recover by-products such as ethane, condensate oil, liquefied gas, and light hydrocarbons produced by natural gas condensate. However, natural gas extracted from gas fields usually contains wax components in different proportions. Since the main component of the wax is a mixture of so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/72C10L3/10
CPCC10L3/101
Inventor 代敏荣少杰吴昊刘百春葛劲风赵建彬王爱军万霞郑德旺林斌
Owner BC P INC CHINA NAT PETROLEUM CORP