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Process device and method for removing heavy hydrocarbon in natural gas by adopting LPG (Liquefied Petroleum Gas)

A process device and natural gas technology, which is applied in the petroleum industry, gas fuel, liquid hydrocarbon mixture recovery and other directions, can solve the problems of unfavorable energy saving and consumption reduction, complex process, large investment, etc., and achieves short manufacturing period, simple process and low investment. Effect

Inactive Publication Date: 2013-08-28
CHINA GASOLINEEUM ENG
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Problems solved by technology

The disadvantages of the above two processes for removing heavy hydrocarbons from natural gas containing heavy hydrocarbons are large investment, high energy consumption, many equipments required, and complicated processes, which are not conducive to energy saving and consumption reduction

Method used

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  • Process device and method for removing heavy hydrocarbon in natural gas by adopting LPG (Liquefied Petroleum Gas)

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Embodiment Construction

[0009] A process device for LPG to remove heavy hydrocarbons in natural gas, such as figure 1 As shown, it includes: heavy hydrocarbon scrubber 1, cooler 2, deethanizer 3, deethanizer reflux pump 4, deethanizer reflux tank 5, deethanizer condenser 6, debutanizer 7 , debutanizer condenser 8, debutanizer reflux tank 9, debutanizer reflux pump 10, LPG booster pump 11, debutanizer bottom condenser 12 and throttle valve 13. in:

[0010] Heavy hydrocarbon scrubber 1 is connected with throttle valve 13, cooler 2, deethanizer 3, debutanizer 7 and debutanizer bottom condenser 12 in sequence; the top outlet of deethanizer 3 is connected with deethanizer in turn The tower condenser 6, the deethanizer reflux tank 5, the deethanizer reflux pump 4 and the upper inlet of the deethanizer 3 are connected; The tower reflux tank 9, the debutanizer reflux pump 10 are connected to the upper inlet of the debutanizer 7; the debutanizer reflux tank 9 is connected to the upper inlet of the heavy hyd...

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Abstract

The invention discloses a process device and a process method for removing heavy hydrocarbon in natural gas by adopting LPG (Liquefied Petroleum Gas) in a natural gas liquefying process. The process device comprises a heavy hydrocarbon washing tower, a deethanization tower and a debutanization tower, wherein the heavy hydrocarbon washing tower is connected with a throttle valve, a cooler, the deethanization tower and the debutanization tower in sequence; the top outlet of the debutanization tower is connected with a debutanization tower condenser, a debutanization tower reflux tank, a debutanization tower reflux pump and a debutanization tower upper inlet in sequence; and the debutanization tower reflux tank is connected with an upper inlet of the heavy hydrocarbon washing tower by an LPG booster pump. The process device and the process method for removing heavy hydrocarbon in natural gas by adopting LPG have the positive effects that the LPG products produced in the device are utilized to wash, and the LPG product source is stable and reliable; the heavy hydrocarbon removing effect is good, so that the heavy hydrocarbon components in the natural gas are removed as much as possible for facilitating a liquefying process and effectively preventing the heavy hydrocarbon from being frozen and blocked; and the heavy hydrocarbon removing process by adopting the LPG is simple, so that the deep pre-treatment needs of the natural gas liquefaction can be achieved by absorbing and transferring mass, and therefore, the natural gas liquefaction needs are satisfied.

Description

technical field [0001] The invention relates to a process device and method for removing heavy hydrocarbons in natural gas by using LPG in the natural gas liquefaction process, in particular to the device and method for removing heavy hydrocarbons in the large-scale natural gas liquefaction process. Background technique [0002] Natural gas must undergo advanced pretreatment before liquefaction, including the removal of heavy hydrocarbon components, so as to effectively avoid the freezing and blocking caused by impurities in the natural gas liquefaction process, especially the condensation and freezing of heavy hydrocarbon components in low-temperature environments. Blockage of pipes, valves and plate-fin heat exchangers and other equipment. At present, the methods for removing heavy hydrocarbons from natural gas at home and abroad mainly include rectification and adsorption. When the adsorption method is used to remove heavy hydrocarbons in natural gas, its removal perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10C10L3/12C10G5/00C10G5/06C10G5/04
Inventor 黄勇刘家洪蒲黎明李娜王科陆永康陈运强冼祥发李莹珂谌天兵宋德琦郭成华法玉晓王刚姜宁龙海洋田静
Owner CHINA GASOLINEEUM ENG
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