Integral mobile natural gas liquefaction device

Abstract

The invention discloses an integral mobile natural gas liquefaction device which is assembled in a mobile and integral manner. The device comprises a heavy hydrocarbon removal unit, a decarbonization unit, a dehydration unit, a liquefaction unit, an amine liquid regeneration unit, a cooling unit and a public project. The liquefaction device is characterized in that a mixed refrigerant and R22 are taken as cryogens to provide a refrigerating capacity for natural gas liquefaction; R134a and air cooling are combined to take the place of a traditional water cooling system, so rapid and convenient use of natural gas in areas which have not water supply and lack water becomes possible; and natural gas liquefaction can be achieved basically without pipeline laying on the ground. According to the invention, a sub-set mode is replaced by an integral machine mode, so floor space of equipment is further reduced; operations are more flexible; moving and assembly are convenient; operations and repair are simple; and consumption of manpower and materials is reduced. New technologies are used, so energy consumption is reduced; the degree of automation is greatly increased; the problem of water source lack is solved; and the device is applicable to various nonconventional gases and complicated terrains, so the utilization rate of the nonconventional gases can be increased greatly.

Description

[0001] Technical field: [0002] The invention belongs to a device for natural gas pretreatment and liquefaction, in particular to an integrated mobile natural gas liquefaction device. [0003] Background technique: [0004] Traditional LNG liquefaction plants have complex preparation procedures, high investment costs, long construction period, large floor area, complex process, high overall energy consumption, limited scope of application, and are not suitable for the use of gas in isolated wells and single wells in remote mountainous areas. . Due to the difficulty in developing unconventional natural gas, the geographical location of gas wells is complicated, and the laying of pipelines is out of reach. At present, most of the equipment in the existing technology is divided into different modules according to their functions, mainly modular mobile liquefaction equipment. , in which the refrigeration process mainly adopts a relatively mature nitrogen expansion process; the ab...

AI Technical Summary

Problems solved by technology

[0004] Traditional LNG liquefaction plants have complex preparation procedures, high investment costs, long construction period, large floor area, complex process, high overall energy consumption, limited scope of application, and are not suitable for the use of gas in isolated wells and single wells in remote mountainous areas.

Due to the difficulty in developing unconventional natural gas, the geographical location of gas wells is complicated, and the laying of pipelines is out of reach. At present, most of the equipment in the existing technology is divided into different modules according to their functions, mainly modular mobile liquefaction equipment. , in which the refrigeration process mainly adopts a relatively mature nitrogen expansion process; the absorption tower and regeneration tower adopt a single high tower, the equipment height is high, and there are limitations in transportation

Therefore, in order to solve the practical problems of traditional liquefaction plants, such as large floor area, long construction period, high cost, low integration, and non-movability, the applicant developed a low-tower and multi-tower series connection to realize decarburization and amine The purpose of liquid regeneration is to provide a balanced integrated mobile natural gas liquefaction equipment for the energy of the entire circulation system, which not only saves the space occupied by the equipment, but also saves energy consumption

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