SU1514981A1 - Gas lift - Google Patents

Abstract

The invention can be used in the design of hydrotransport systems for general industrial use. The purpose of the invention is to increase efficiency by creating resonant phenomena in the riser. Between the lifting and supply pipes 2 and 1 there is installed an air distributor 3 coaxial with them, comprising a partition 4 movable in the axial direction with a confuser 8 and a shell 7 and connected to the source 4 of the working medium. The confuser 8 interacts with the seating surface 6 of the bell 7 of the supply pipe 1. When gas is supplied from the source, the weight compensator 9 holds the confuser 8 on the seating surface 6 of the bell of the feeding pipe 1. When the lifting force of the accumulated gas lifts the confuser 8 with the seating surface 6 lifting pipe 2 and lift the portion of the liquid to the surface. The gas flow rate from the source and the design of the compensator 9 can be set to a resonant (self-oscillatory) mode, which increases the efficiency of the gas lift. 1 hp ff, 1 ill.

Description

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The invention relates to pump construction, in particular, to the design of a pulsed gas lift, and can be used in the design of hydraulic transport systems for general industrial purposes.

The purpose of the invention is to increase economic efficiency by creating resonant phenomena in the riser,

The drawing shows schematically a gas lift, a longitudinal section.

The gas lift contains coaxial feed and lifting pipes 1, 2, located between the air distributor 3, connected to the working source. medium (not shown in the drawing) and provided with a cylindrical partition 4 installed inside the lifting pipe 2 with the possibility of axial movement relative to the supply and lifting pipe 1, 2 and separating the air distributor 3 from the lifting pipe 2,

The supply pipe 1 is equipped with an outlet bell 5 with a vacuum | 1; a full face 6, a cylindrical partition 4 is equipped with a cylindrical shell 7 and a confusor 8 connecting the partition 4 with shell 7 and a contact with the seating surface 6 of the bell 5, while the shell 7 is located outside the feed; pipes 1 to it. The partition 4 can be equipped with a weight compensator 9 fixed outside the confuser 8 and can be equipped with it depending on the specific conditions or a load or float. The gas lift is also equipped with a pneumatic actuator 10,

Gas lift works as follows.

The compressed gas is injected into the air distributor 3. Under the force of the pressure of compressed air on the inner walls of the confuser 8, the excess pressure of the hydrostatic column of the slurry on the outer walls of the confuser 8, the latter moves to the upper end position, opening air to the riser 2. the guide for the shell 7 is the air diffuser 3, and the guide for the partition 4 is the lifting pipe 2 "Compressed air, mixing with the hydraulic mixture entering the feed pipe 1, forms airborne the whole which, by the lifting pipe 2, rises to a predetermined height By virtue of those arising in the feeding pipe 1

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the hydraulic losses of the pressure of the hydro-slurry in the lower part of the riser 2, and hence the pressure of the compressed air in the air distributor 3, becomes less than the pressure of the hydrostatic column of the slurry in each horizontal section considered. Therefore, the pressure of the hydrostatic column of the slurry on the outer wall of the confuser 8 exceeds the force of pressure of the compressed air on its inner wall, and the confuser 8 with shell 7 and the partition 4 moves downwards. Confusor 8 joins the seating surface 6 of the socket 5 and the compressed air stops entering the lift pipe 2. At the same time, it eliminates the penetration of solid particles from the lifting pipe 2 into the air distributor 3 and the blocking of the pneumatic actuator 10.

At the lower extreme position of the confuser 8, the pressure of the compressed air in the air distributor 3 rises, as a result of which it again moves upwards. The cycle is repeated.

The frequency of oscillation of the confuser 8, which determines the frequency of natural oscillations of the pneumatic actuator 10, the weight (or float volume) of the compensator 9, the reverse effect of the oscillation frequency of the flow of the ahydrogen mix, provides resonant oscillations in the riser 2 with a frequency equal to its own frequency gas lift, which increases the efficiency of gas lift.

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Claims (2)

40 claims five 1, a gas lift containing coaxial supply and lifting pipes, an air distributor located between them, connected to a source of working medium and provided with a cylindrical partition installed inside the lifting pipe c. the possibility of axial movement relative to the supply and lifting pipes and separating the air distributor from the lifting pipe, characterized in that, in order to increase efficiency by creating resonant effects in the lifting pipe, the supply pipe is equipped with an outlet socket with a seating surface, a cylindrical partition equipped with a distal shell and a confusor connecting the partition 0 five 515149816 with shell and in contact with the 2. Gas lift pop. 1, with a different surface of the socket, and with the fact that the partition with the shell is located is detected by a weight compensator, fixed by a pipe attached to the outer side of the confuser.