Hydrocarbon injection dewaxing device and technology suitable for dehydration and hydrocarbon removal of wax-containing natural gas

Abstract

The invention discloses a hydrocarbon injection dewaxing device and technology suitable for dehydration and hydrocarbon removal of wax-containing natural gas. The device comprises a feed gas precooler, a feed gas separator, a feed gas aftercooler, a refrigeration facility, a low temperature separator, a heater and a three-phase separator that are connected in order. The invention has the positiveeffects that: by fully combining the natural gas dehydration and hydrocarbon removal process, a hydrocarbon liquid obtained by heating and separation of a low-temperature alcohol hydrocarbon liquid isinjected into a feed gas precooler inlet feed gas pipeline, external non-waxy light hydrocarbon is injected into a feed gas aftercooler inlet pipeline, hydrocarbon liquid and light hydrocarbon are utilized to change the natural gas composition, most of the paraffin in the feed gas is removed by pre-cooling separation of feed gas, and part of the paraffin is removed by cryogenic refrigeration separation of the feed gas. As hydrocarbon liquid and light hydrocarbon dissolve the paraffin precipitated in a natural gas cooling process, blockage of equipment and valves by colloidal or solid paraffincan be effectively avoided. The device provided by the invention is flexible in operation, and can meet the dewaxing needs of natural gas dehydration and hydrocarbon removal process in different wax-containing gas fields.

Description

technical field [0001] The invention relates to a hydrocarbon injection dewaxing device and process which utilizes wax-free light hydrocarbons and hydrocarbon liquid obtained by low-temperature separation to inject raw material gas into raw material gas to change the composition of raw material natural gas to prevent wax precipitation during dehydration and dehydrocarbon cooling of natural gas. Background technique [0002] With the massive development of global natural gas resources, the application of natural gas as a clean energy in industry and civil use is becoming more and more extensive, and its role in the energy field is becoming more and more important. an important component. [0003] In the treatment of natural gas in condensate gas fields, low-temperature separation treatment process is usually used for dehydration and dehydrocarbonation of natural gas. Dew point required product gas. The problem of freezing blockage has always been a key point and difficulty ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a hydrocarbon injection dewaxing device and process suitable for dehydration and dehydrocarbonation of waxy natural gas, aiming at overcoming the technical shortcomings of wax precipitation and blockage of equipment during the dehydration and dehydrocarbonation of waxy natural gas. Can effectively solve the problem of wax plugging

Images