Condensed liquid recycling method for high-pressure natural gas

A recovery method and natural gas technology, applied in liquefaction, solidification, refrigeration and liquefaction, etc., can solve the problems of high recompression power heat load, excess cooling capacity, increased system energy consumption, etc., to reduce heat load and reduce heat loss , The effect of reducing system energy consumption

Active Publication Date: 2015-07-29
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

For feed gas with an inlet pressure higher than 7.0MPa, the pressure drop of the expander for the dual-tower process is determined by the allowable operating pressure of the deethanizer, and the pressure drop generated by the expander will

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  • Condensed liquid recycling method for high-pressure natural gas
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  • Condensed liquid recycling method for high-pressure natural gas

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Embodiment Construction

[0022] Below in conjunction with the attached in the embodiment of the present invention image 3 , clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0024] Raw gas composition and...

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Abstract

The invention discloses a condensed liquid recycling method for high-pressure natural gas, and relates to the technical field of natural gas processing technologies. According to the method, on the basis of an expansion machine refrigeration-twin tower technology, low-content propane liquid hydrocarbon is used as an absorbent; a high-pressure absorption tower is arranged; by adoption of a high-pressure and low-temperature absorption and gasification refrigeration theory, propane and condensed liquid heavier than propane in a gas phase from the outlet of an expansion machine are recycled; in the process, a cold box adopts a multi-strand high-efficiency plate fin type heat exchanger; a deethanization tower adopts three strands of material feeding, so that the high-pressure natural gas condensed liquid recycling method including expansion machine refrigeration, high-pressure absorption and condensed water fractionation is realized. According to the method, the compression power of an external air conveying pressurizer and the energy consumption of a device system are reduced, the separation effect and the operation stability of an absorption tower are improved, the system cold and heat utilization rate and the propane recycling rate are improved, and the economical benefit of device operation is enhanced.

Description

technical field [0001] The invention relates to the technical field of natural gas processing technology, in particular to a method for recovering high-pressure natural gas condensate. Background technique [0002] In recent years, with the development of my country's natural gas industry, the technology of using expander refrigeration to recover natural gas condensate has developed rapidly. The feature of the expander refrigeration process is to use the difference in raw material pressure to obtain cooling capacity. The larger the expansion ratio, the lower the outlet pressure of the expander. , the more cooling capacity of the system, the higher the condensate recovery rate. The existing typical double-tower propane recovery flow chart is as follows figure 2 As shown, it is a double-tower process consisting of an absorption tower and a deethanizer tower. It uses expander refrigeration to recover propane and condensate components above propane in natural gas. The technolog...

Claims

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Application Information

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IPC IPC(8): F25J3/02
CPCF25J3/0209F25J3/0233F25J3/0242F25J2240/02F25J2205/04F25J2200/04F25J2200/74F25J2200/78F25J2235/60
Inventor 蒋洪黄思宇朱聪
Owner SOUTHWEST PETROLEUM UNIV
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