FIELD: natural gas industry; petroleum industry; methods of combined purification of a natural gas and devices for its realization.
SUBSTANCE: the invention is pertaining to the field of natural gas industry and petroleum industry, in particular, to the methods and devices of combined purification of natural gases from acidic ingredients of a natural gas, a carbon dioxide, sulfur compounds. The mean includes two stages of a gas purification. In the beginning the initial gas is preliminary purified from acidic ingredients by absorption in the apparatus ensuring a contact of the subjected to purification gas with a chemical sorbent. Separate the absorbed acidic ingredients of the gas from the chemical sorbent in a desorber by its heating, then cool the chemical sorbent in a heat exchanger and pump in the absorber. At the second stage conduct deep purification and gas dewatering by adsorption by alternately operating adsorbers. At that absorption of the acidic ingredients is conducted in the screw compressor in the process of the gas compression. Into the working cavity of compression of the screw compressor feed the chemical sorbent, which is treated in an electromagnetic field with a flux density of 0.15-0.25 Tl. Desorption of the purification products is conducted in desorber under pressure of 0.8-0.9 bar (aeu - absolute electrostatic unit), formed by the water-ring vacuum pump, which simultaneously traps the water steam and chemical sorbent. The device for realization of the method is described also. The invention allows to increase the mass-transfer coefficient at the contact of the subjected to purification gas with the chemical sorbent, to reduce mass- overall dimensions of the combined purification unit and its materials consumption.
EFFECT: the invention ensures an increased mass-transfer coefficient at the contact of the subjected to purification gas with the chemical sorbent, reduced mass- overall dimensions of the combined purification unit and its materials consumption.
2 cl, 1 ex, 1 dwg
