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For covering peak gas consumption loads, gas transportation, provision of gas supply to remote, rural and resort areas and for using gas as engine fuel, LENNIIHIMMASH Group designs both large-capacity plants for production of liquefied natural gas with capacity of 10-40 t/hour with a high (more than 90%) gas liquefaction ratio, and low-capacity plants with capacity up to 1 t/h.
The liquefaction process comprises a single-flow cooling cycle using mixture of hydrocarbons and nitrogen. Such plant includes the following units:
For low-capacity gas liquefying plants, the following liquefaction methods are possible:
The latter is recommended to be used at gas distribution stations, where a reducing unit is replaced by a natural gas liquefaction plant providing gas expansion in an expansion unit and partial liquefaction. This method practically does not require any energy consumption. The plant output depends on the flow rate of gas arriving at gas distribution stations and on pressure difference range at station inlet/outlet.
The plant includes the following units:
For production of engine fuel, a wide range of plant capacities is available in terms of both processed gas and produced liquefied gas, depending on the gas source and requirements (i.e., sales opportunities).