RU2465038C1 - Gas filter - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to oil industry and may be used for cleaning petroleum associated gas at oil fields. Gas filter comprises casing with roily gas feed branch pipe and clean gas discharge branch pipe, coarse and fine cleaning chambers. Said chambers are separated by web not extending to casing bottom. Vanes are arranged in fine cleaning chamber. First vane is arranged opposite inlet branch pipe at 40-50° to gas flow direction. Other vanes are secured on the chamber opposite walls at 85-95° to previous vane, one under the other, with clearance between the vane and opposite wall. Inclined gauzes covering the chamber entire area are arranged inside fine cleaning chamber. Said gauzes are arranged one above the other and feature aperture size decreasing from bottom gauze to top one. Accumulator tank is arranged under said chambers and provided with controlled bottom branch pipe and fluid level control system. Gas filter is furnished with heated jacket with inside temperature control system.

EFFECT: higher efficiency of filtration.

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Description

The invention relates to the oil industry and may find application in the purification of petroleum associated gas in oil fields.

A gas filter device is known which comprises a housing; a flexible filter layer that separates the interior of the housing into the inlet chamber and the outlet chamber and has a gas-permeable portion; an inlet channel connected to the inlet chamber and generating gas into the inlet chamber; an exhaust channel connected to the exhaust chamber and directing gas coming from the inlet chamber to the exhaust chamber through a filter layer from the exhaust chamber, wherein the exhaust channel has an opening; and an offset restricting portion that restricts the offset of a portion of the gas-permeable portion of the filter layer near the opening toward the opening, wherein the offset restricting portion is located only near a portion of the gas-transmitting portion, in the vicinity of the opening (RF patent No. 2398613, publ. 10.09. 2010).

The known device has a very limited service life when cleaning associated petroleum gas, carrying with it drops of water and pollution in the form of solid mechanical particles.

Closest to the proposed invention in technical essence is a filter for wet gas purification, including a housing with a liquid, which is equipped with an inlet pipe for supplying contaminated gas and an outlet pipe for the release of clean gas. The filter has coarse and fine cleaning chambers, the last of which contains sections formed by horizontal perforated partitions and vertical perforated dividers. Horizontal perforated partitions are installed with the possibility of reciprocating movement in the horizontal plane. The vertical perforated separators in the fine chamber are additionally equipped with double-sided traps made in the form of a mesh with a mesh diameter of 50-150 μm from easily deformable material, for example, from kapron or lavsan, fixed around the perimeter of the sides of the vertical separator (RF patent No. 2166979, publ. 20.05. 2001 - prototype).

The known filter does not allow high-quality purification of associated petroleum gas from dropping liquid and contaminants.

The proposed invention solves the problem of purification of associated petroleum gas from a droplet liquid and contaminants in the form of solid suspended particles.

The problem is solved in that in a gas filter comprising a housing with an inlet for supplying contaminated gas and an outlet for emitting clean gas, with coarse and fine filters, according to the invention, the coarse and fine cameras are separated by a partition that does not reach the bottom of the body, blades are located in the rough cleaning chamber, the first blade is located opposite the inlet pipe at an angle of 40-50 ° to the direction of gas flow, the remaining blades are mounted alternately on opposite walls of the chamber at an angle of 85-95 ° to the previous the second blade in series one after the other and with a gap between the blade and the opposite wall, nets are installed behind the partition in the fine-cleaning chamber, installed obliquely and overlapping the entire area of the chamber, the nets are located one above the other and have a decreasing mesh size from the lower mesh to the upper, from below under the cameras have a storage tank with an overlapping nozzle in the bottom and a liquid level control system, the gas filter is equipped with a heated casing with a temperature control system inside.

SUMMARY OF THE INVENTION

When preparing oil at a field, oil is heated in furnaces in which associated petroleum gas is used as fuel. Such a gas includes pollution in the form of suspended solids and a dropping liquid that turns into condensate. Condensation and contamination cause the furnace elements to fail, in particular the igniter and the solenoid valve. To eliminate the ingress of condensate and contaminants into the furnace elements, the claimed gas filter is proposed.

Figure 1 presents the claimed gas filter.

The gas filter includes a housing 1 with an inlet pipe 2 for supplying contaminated gas and an outlet pipe 3 for the release of clean gas, with coarse 4 and fine filters 5 separated by a partition 6 not reaching the bottom 7 of the housing 1. In the primary chamber 4 are blades . The first blade 8 is located opposite the inlet pipe 2 at an angle α = 40-50 ° to the direction of gas flow “A”, the remaining blades 9 and 10 are mounted alternately on opposite walls of the chamber at an angle β = 85-95 ° to the previous blade successively one below the other and with a gap between the blade and the opposite wall. Behind the partition 6 in the fine cleaning chamber 5 there are nets 11 installed obliquely and overlapping the entire area of the chamber 5. The nets are located one above the other and have a decreasing mesh size from the lower to the upper mesh. Below the chambers 4 and 5, there is a storage tank 12 with an overlapping nozzle 13 in the bottom 7, designed to accumulate liquid 14. The liquid level 14 is regulated by a liquid level control system 15, which is two level signal sensors 16 and 17 and an electromagnetic valve 18 that blocks pipe 13. The gas filter is equipped with a heated casing 19 with a temperature control system 20 inside and a temperature sensor 21.

The gas filter operates as follows.

Associated petroleum gas with water droplets and solid particles of contaminants enters through the inlet pipe 2 into the rough cleaning chamber 4 of the housing 1 of the gas filter. The gas jet hits the first blade 8 and changes the direction of motion by an angle of about 90 °. At the same time, part of the water droplets and contaminants are retained on the first blade 8. Next, the gas jet successively hits the blades 9 and 10 and a part of the water droplets and contaminants are also retained on them. A gas stream passes under the partition 6 into the fine-purification chamber 5. Here, the gas passes through the inclined screens 11, leaves water droplets and contaminants on them, passes up and leaves the housing 1 through the outlet pipe 3 to the nozzles of the furnace for heating oil (not shown ) Water droplets and contaminants accumulated on the blades 8, 9 and 10, slide down the blades down into the storage tank 12. According to the inclined nets 11 from the bottom of the nets, they roll down the grid and 12 drops of water and pollution are sifted through the nets 11. When reaching the upper liquid level in the storage tank 12, the upper level alarm sensor 16 is triggered, by means of which the electromagnetic valve 18 is opened and the liquid is poured out of the housing 1 through the pipe 13 until the lower level is reached, at which the lower level alarm sensor 17 is activated, by means of which the electromagnetic valve 18 is closed and the liquid is removed from the housing 1. At negative temperatures, the temperature sensor 21 is activated, the temperature control system 20 supplies voltage to the heated casing 19, the filter housing 1 and the electromagnetic valve 18 are heated.

The gas emerging from the proposed gas filter has sufficient purity and is free from contamination and moisture, and its use as a fuel does not cause a failure of the furnace elements, in particular the igniter and the electromagnetic valve.

The application of the proposed gas filter will allow to solve the problem of cleaning petroleum associated gas from dropping liquid and suspended solids.

Claims (1)

A gas filter, comprising a housing with an inlet for supplying contaminated gas and an outlet for emitting clean gas, with coarse and fine filters, characterized in that the coarse and fine chambers are separated by a partition that does not reach the bottom of the body, and are located in the coarse chamber blades, the first blade is located opposite the inlet pipe at an angle of 40-50 ° to the direction of gas flow, the remaining blades are mounted on opposite walls of the chamber at an angle of 85-95 ° to the previous blade successively one under the other and with a gap between the blade and the opposite wall, behind the partition in the fine-cleaning chamber there are nets installed obliquely and overlapping the entire area of the chamber, the nets are located one above the other and have a decreasing cell size from the lower mesh to the upper, there is a storage tank with a blocked nozzle in the bottom and a liquid level control system, the gas filter is equipped with a heated casing with a temperature control system inside.

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