EA024821B1 - Compressed gas cyclone separator - Google Patents

Abstract

The disclosed technical solution relates to separation of disperse particles from gases, and can be used in any branch of industry, in particular in compressors manufacturing. The technical result of the invention is early isolation of the main mass of individual liquid particles and mechanical admixtures from gas/liquid flow to exclude effect of liquid recapture, resulting in improved gas quality at the separator output. To achieve the technical result the compressed gas cyclone separator contains a vertical cylindrical housing (5), a top cover (1), a gas/liquid mixture input nozzle (2), a gas output nozzle (3), a drain nozzle (4), a swirler (8), a filter element (7) comprising an external tube (11), an internal strainer tube (9), and a false bottom (10). The swirler (8), also being component of the filter element (7), is installed on top edge of the vertical cylindrical housing (5), and the false bottom (10) is secured to the bottom edge of the internal strainer tube (9). The bottom edge of the internal strainer tube (9) is located below the bottom edge of the external tube (11). The gas/liquid mixture input nozzle (2) and the gas output nozzle (3) are located in the top cover (1). The gas/liquid mixture input nozzle (2) is located above the swirler (8). The bottom edge of the gas output nozzle (3), if looking along gas movement direction, external tube (11), and the internal strainer tube (9) of the filter element (7) are located coaxially to each other and to the shell of the vertical cylindrical housing (5). To ensure tightness of the thread joint between the top cover (1) and the vertical cylindrical housing (5) the housing (6) seal is used. An automatic mechanical hot well (15) made in form of hot well enclosure (16) is moved beyond the vertical cylindrical housing (5). The vertical cylindrical housing (5) of the compressed air cyclone separator and the hot well enclosure (16) are connected with each other by the nozzle (12).

Description

(57) The claimed technical solution relates to the field of separation of dispersed particles from gases and can be used in any industry, in particular in compressor engineering. The technical result of the invention is the early isolation of the bulk of the separated particles of liquid and solids from the gas-liquid flow in order to eliminate the effect of re-capture of the liquid, which leads to an increase in the quality of the gas at the outlet of the separator. To achieve a technical result, the cyclone compressed gas separator contains a vertical cylindrical body (5), a top cover (1), a gas-liquid mixture inlet pipe (2), a gas outlet pipe (3), a drain pipe (4), a swirl (8), a filter an element (7) consisting of an outer tube (11), an inner mesh tube (9) and a false bottom (10). The swirler (8), which is also an integral part of the filter element (7), is mounted on the upper cut of the vertical cylindrical body (5), and the false bottom (10) is attached to the lower cut of the inner mesh tube (9). The lower cut of the inner mesh tube (9) is located below the lower cut of the outer tube (11). The inlet of the gas-liquid mixture (2) and the outlet of the gas outlet (3) are located in the top cover (1). The inlet of the gas-liquid mixture (2) is located above the swirler (8). The lower section of the gas outlet pipe (3), as viewed in the direction of gas flow, the outer tube (11) and the inner mesh tube (9) of the filter element (7) are aligned with each other and the side of the vertical cylindrical body (5). To ensure the tightness of the threaded connection between the top cover (1) and the vertical cylindrical body (5), a seal is used for the body (6). An automatic mechanical steam trap (15), made in the form of a steam trap shell (16), is moved outside the vertical cylindrical body (5). The vertical cylindrical body (5) of the cyclone compressed air separator and the shell of the steam trap (16) are connected by a fitting (12).

024821 B1

Technical field

The claimed technical solution relates to the field of separation of dispersed particles from gases and can be used in engineering, oil, gas, chemical and other industries. In particular, the invention can be used in compressor engineering.

State of the art

A device for separating liquid from a gas is known, for example, a moisture-oil separator (RF patent No. 2489195 for an invention, IPC Β01Ό 45/12, B04C 5/00, 2013 [1]), comprising a vertical cylindrical body, upper and lower bottoms, inlet, outlet and drain pipes, a partition equipped with quadrangular windows with deflector plates. The lower part of the housing is designed to collect liquid and solid impurities separated from the gas. A pipe is installed at the outlet, the lower part of which is closed by a lid. A perforated piston with a spring is installed in the upper part of the pipe. In the inner space of the pipe between the cap and the piston, a coalescing material is clamped, which is under the pressure of the spring on the piston.

The disadvantage of this analogue is the use of a filter element to trap moisture and mechanical impurities, namely a pipe with a perforated piston and spring, the rapid clogging of which leads to an increase in hydraulic resistance and the need for frequent maintenance of the moisture separator.

A device is also known, for example, a filter cyclone for gas purification (RF patent No. 56221 for a utility model, IPC V04C 9/00, 2006 [2]). As in the claimed technical solution, this analogue contains a vertical cylindrical body, a fitting for removing dust, an exhaust pipe, a fitting for supplying a dusty gas stream to the apparatus, a cover, a set of filters.

The disadvantage of this analogue is the lack of structural elements, for example, such as a water-oil separator, a perforated horizontal partition, used to separate the separated gas stream from the dust-liquid phase in the lower part of the housing, which leads to the capture of the separated particles by the gas stream, increasing secondary entrainment, which in turn entails quickly clogging the filters and increases their hydraulic resistance.

A filter separator is also known (RF patent No. 70813 for utility model, IPC Β01Ό 45/12, 2007 [3]). As in the claimed technical solution, this analogue contains a vertical cylindrical body, a gas-liquid mixture inlet pipe, a gas outlet pipe, a liquid outlet pipe, filter elements, a swirler, a device for controlling the level of condensate, a cover, a protective screen, a sealing ring and a differential pressure gauge.

The disadvantages of the filter separator selected as a prototype include the fast clogging of the filter due to the lack of structural elements, such as a water-oil separator, a perforated horizontal partition, etc., which serve to separate the separated gas stream from the dust-liquid phase in the lower part of the housing, which leads to a significant increase in the hydraulic resistance of the filters, the need for frequent maintenance of the filter separator and a decrease in its operational characteristics.

The specified analogue [3] is the combination of essential features the closest analogue of the same purpose to the claimed technical solution. Therefore, it is adopted as a prototype.

Disclosure of the claimed technical solution

The technical problem to which the claimed technical solution is directed is to increase the separation efficiency and improve the quality of the gas at the separator outlet.

The technical result provided by the claimed technical solution is the earlier isolation of the bulk of the separated liquid particles and solids from the rest of the gas-liquid stream, eliminating the effect of re-capture of the liquid by this stream, which leads to an increase in the separation efficiency, and, consequently, an increase in the gas quality at the separator outlet .

The essence of the claimed technical solution is that the known separator comprises a vertical cylindrical body, a top cover, a gas-liquid mixture inlet pipe, a gas outlet pipe, a drain pipe, a swirler, a filter element consisting of an external tube, an internal mesh tube and a false bottom.

The inventive compressed air cyclone separator is characterized in that the swirl, which is an integral part of the filter element, is installed on the upper cut of the vertical cylindrical body, and the false bottom is attached to the lower cut of the inner mesh tube. The lower cut of the inner mesh tube is located below the lower cut of the outer tube. The nozzles of the gas-liquid mixture inlet and gas outlet are located in the top cover, while the nozzle of the gas-liquid mixture inlet is located above the swirl.

The above essence is a set of essential features of the claimed technical solution, ensuring the achievement of the claimed technical result.

In special cases, it is permissible to carry out the technical solution as follows. The lower section of the gas outlet pipe, as you look along the gas, the outer tube and the inner mesh tube of the filter element are aligned with each other and the shell of the compressed gas separator barrel is cylindrical. The tightness of the threaded connection between the top cover and the vertical cylindrical body is provided by a seal for the body. An automatic mechanical steam trap made in the form of a steam trap shell containing a direct-acting valve, a manual purge valve, a float, a lever, a drain outlet of a steam trap and a nipple with an exhaust pipe for bleeding air is taken out of the vertical cylindrical body of the cyclone compressed air separator. The vertical cylindrical body of the cyclone compressed air separator and the shell of the automatic mechanical steam trap are connected by a fitting.

The author of the claimed technical solution made a prototype of this solution, the tests of which confirmed the achievement of the technical result.

Brief Description of the Drawings

In FIG. 1 shows a longitudinal section through a cyclone compressed gas separator; FIG. 2 is a section AA of FIG. 1, in FIG. 3 - section BB (expanded) of FIG. 2.

Reference List

- top cover;

- the inlet of the gas-liquid mixture;

- gas outlet pipe;

- drain pipe;

- vertical cylindrical body;

- seal for the housing;

- filter element;

- swirl;

- inner mesh tube;

- false bottom;

- outer tube;

- fitting;

13, 14 - nozzles for installing a differential pressure gauge;

- automatic mechanical steam trap;

- the cover of the steam trap;

- direct acting valve;

- float;

- lever arm;

- manual purge valve;

- drain hole of the steam trap;

- swirl blade.

Implementation of a technical solution

The cyclone compressed gas separator (Fig. 1) contains a vertical cylindrical body (5), in the lower part of which there is a drain pipe (4), to which an automatic mechanical steam trap (15) is connected through a fitting (12);

the upper cover (1) of the vertical cylindrical body (5), in which the nozzle of the gas-liquid mixture inlet (2), the gas outlet nozzle (3) and nozzles (13, 14) for installing a differential pressure gauge (not shown) are located;

filter element (7), consisting of an outer tube (11), a swirler (8), an inner mesh tube (9) and a false bottom (10). The lower cut of the inner mesh tube (9) is located below the lower cut of the outer tube (11) of the filter element (7). The swirler (8) is made of bent blades (22) arranged with equal pitch around the circumference, which ensure effective swirling of the gas-liquid flow. The false bottom (10) is attached to the lower cut of the inner mesh tube (9) of the filter element (7). Between the inner wall of the vertical cylindrical body (5) and the false bottom (10) there is an annular gap;

a seal for the housing (6), ensuring the tightness of the threaded connection between the top cover (1) and the vertical cylindrical housing (5);

an automatic mechanical steam trap (15) moved outside the vertical cylindrical body (5), designed to remove the separated moisture, oil impurities and mechanical impurities from the compressed gas system. The automatic mechanical steam trap (15) is made in the form of a steam trap shell (16), in which a direct-acting valve (17), a manual purge valve (20), a float (18), a lever (19) and a drain hole of the steam trap (21) are placed. Also, the automatic mechanical steam trap (15) is equipped with a nipple with an exhaust pipe (not shown) for air exhaust. The vertical cylindrical body (5) and the automatic mechanical steam trap (15) are connected to each other through a fitting (12).

The cyclone compressed gas separator operates as follows.

The gas-liquid flow through the inlet of the gas-liquid mixture (2) enters the swirl (8).

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The swirler (8) changes the direction of gas-liquid flow and forms its vortex motion around the filter element (7). In the space formed by the inner surface of the vertical cylindrical body (5) and the outer surface of the outer tube (11), the bulk of the liquid and mechanical impurities are released from the gas-liquid flow. Liquid droplets and mechanical impurities are discarded by centrifugal force on the inner wall of the vertical cylindrical body (5) of the cyclone compressed gas separator, under the influence of gravitational forces they move along the inner wall in a downward spiral along the gas flow and, passing through the annular gap between the inner wall of the vertical cylindrical housing (5) and a false bottom (10), flow to the bottom of the separator.

A downward flow of gas with a finely divided dropping liquid that has not settled on the inner wall of the vertical cylindrical body (5), reaches the false bottom (10), changes the direction of movement, and enters the inner cavity of the outer tube (11) of the filter element (7). The false bottom (10) attached to the lower cut of the inner mesh tube (9) of the filter element (7) greatly reduces the likelihood of liquid being trapped by the upward flow of the separated gas. The gas flow entering the inner cavity of the outer tube (11), moving in an upward spiral, passes through the inner mesh tube (9) of the filter element (7), where some of the finely dispersed particles of liquid coalesce on the walls of the inner mesh tube (9), and part under the action of centrifugal force is thrown onto the inner surface of the outer tube (11). The purified gas leaves the separator through the gas outlet pipe (3). Drops of liquid deposited on the walls of the inner mesh tube (9) and the inner surface of the outer tube (11), flow under the influence of gravitational forces onto the false bottom (10), then through the annular gap between the vertical cylindrical body (5) and the false bottom (10) fall to the bottom of the separator, where through the drain pipe (4) and the fitting (12) merge into an automatic mechanical steam trap (15). If the liquid exceeds a certain level, the purge control system of the float (18) is activated and the automatic mechanical steam trap (15) discharges the liquid into the drain.

Industrial applicability

The claimed technical solution is implemented using industrially produced devices and materials, can be manufactured at any engineering enterprise and will be widely used in engineering and other industries.

Information sources

1. RF patent No. 2489195 for invention, IPC В01И 45/12, В04С 5/00, 2013.

2. RF patent No. 56221 for utility model, IPC V04C 9/00, 2006.

3. RF patent No. 70813 for utility model, IPC V01I 45/12, 2008 (the closest analogue).

Claims (4)

1. A cyclone compressed gas separator comprising a vertical cylindrical body (5), a top cover (1), a gas-liquid mixture inlet pipe (2), a gas outlet pipe (3), a drain pipe (4), a swirl (8), a filter element (7), consisting of an outer tube (11), an inner mesh tube (9) and a false bottom (10), characterized in that the swirler (8), which is an integral part of the filter element (7), is installed on the upper cut of a vertical cylindrical case (5), and the false bottom (10) is attached to the lower cut of the inner mesh tube (9), while A cut of the inner mesh tube (9) is located below the lower cut of the outer tube (11), and the gas-liquid mixture inlet pipe (2) and gas-outlet pipe (3) are located in the upper cover (1), while the gas-liquid mixture inlet pipe (2) located above the swirl (8). 2. The cyclone compressed gas separator according to claim 1, characterized in that the lower section of the gas outlet pipe (3), as viewed along the gas, the outer tube (11) and the inner mesh tube (9) of the filter element (7) are located coaxial to each other and to the side of the vertical cylindrical body (5) of the cyclone compressed gas separator. 3. The cyclone compressed gas separator according to claim 1, characterized in that it has a seal for the body (6), which ensures the tightness of the threaded connection between the top cover (1) and the vertical cylindrical body (5). 4. The cyclone compressed gas separator according to claim 1, characterized in that it has an automatic mechanical steam trap (15), placed outside the vertical cylindrical body (5) and made in the form of a steam trap shell (16), in which a direct-acting valve (17) is placed ), a manual purge valve (20), a float (18), a lever (19), a drain hole of the steam trap (21) and a nipple with a discharge pipe for bleeding air, while the vertical cylindrical body (5) of the cyclone compressed air separator and the condensate shell tootvodchika (16) are connected with each other through a connecting pipe (12).