RU2624655C1 - Bubble-vortex device of wet dust control - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: bubble-vortex device of wet dust control comprises of a cylindrical chamber with an inlet pipe, a slurry overflow pipe into the slurry tank, an axial sprinkler perforated with holes of small diameter along its entire length and blind at the outlet end. The cylindrical chamber is provided with a pair of swirlers, installed in series. The first swirler in the course of the gas is rigidly fixed to the axial sprinkler, and the second swirl in the direction of the gas is made with a central hole and connected to the walls of the cylindrical chamber, forming a gap for the passage of the gas flow to the central zone of the device. The swirlers are made in the form of an elliptical paraboloid, the guide vanes of which are curved along the helical surface and form curvilinear converging ducts. The cylindrical chamber is attached to a slope to the cyclone by means of flanges and a branch pipe of tangential inlet into the cyclone. Discharge of dispersed particles is carried out by means of a sludge flow pipe into the sludge tank of the device, the cyclone is made as a wet dust collecting unit and in the tangential inlet branch pipe to the cyclone there is a liquid inlet with a nozzle for flushing off the moving foam produced by the rotating gas-liquid flow. In the upper portion of the cyclone body an annular spraying device with at least three nozzles is installed. It is connected to the liquid inlet by a pipeline for flushing off the moving foam that is produced. Purified gas flows through the exhaust pipe of the cyclone, and the sludge - from the cyclone into the hopper to collect therein, and then into the general sludge tank.

EFFECT: increased effectiveness of dust and gas purification.

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Description

The invention relates to a device for wet cleaning of gas emissions and can be used in chemical, oil and other industries.

The closest in technical essence and the achieved effect is a bubble gas vortex apparatus for wet gas purification, containing a cyclone, a cylindrical chamber with an inlet pipe, a sludge flow pipe into a sludge collector, an axial sprinkler perforated along the entire length with small diameter holes and muffled from the output end, into unlike the prototype, the cylindrical chamber is equipped with a pair of swirls installed in series, the first swirl along the gas is rigidly attached to the axial sprinkler, and the second swirl along the gas made with a central hole and connected to the walls of the cylindrical chamber, forming a gap for the gas flow to the central zone of the apparatus, while the swirlers are made in the form of an elliptical paraboloid, the guide vanes of which are curved along a helical surface and form curved confuser channels (RF Patent No. 2382680, prototype )

The disadvantage of the prototype is the relatively low efficiency of dust and gas cleaning due to the absence of a second, wet phase of dust and gas cleaning in the cyclone, which is represented by a device for dry rather than wet dust collection.

The technical result is an increase in the efficiency of dust and gas cleaning due to the organization of the rotational movement of the dust and gas stream, more efficient use of the action of centrifugal forces and the use of a wet dust collector at the outlet of the apparatus as a second, wet, phase of dust and gas purification, which generally improves the efficiency of the apparatus and improves environmental protection.

This is achieved by the fact that in a wet-dust bubbler-vortex apparatus containing a cylindrical chamber with an inlet pipe, a sludge flow pipe into a sludge collector, an axial sprinkler perforated along the entire length with small diameter holes and muffled from the output end, the cylindrical chamber is equipped with a pair of swirlers installed in series , the first swirl along the gas is rigidly attached to the axial sprinkler, and the second swirl along the gas is made with a central hole and connected to the walls of the cylindrical chamber ery, forming a gap for the passage of gas flow to the central zone of the apparatus, while the swirls are made in the form of an elliptical paraboloid, the guide blades of which are curved along the helical surface and form curved confuser channels, while the cylindrical chamber is tilted to the cyclone using flanges and a tangential nozzle input into the cyclone, while the dispersion of particles is discharged using the sludge overflow pipe into the apparatus sludge collector, the cyclone is made in the form of a wet dust collecting apparatus and in the nozzle of the tangential inlet into the cyclone, a liquid inlet with a nozzle is installed to flush the movable foam generated from the rotating gas-liquid flow, and in the cyclone in the upper part of the casing there is an annular sprinkler with at least three nozzles connected by a pipeline to the liquid inlet to flush the formed mobile foam, while the purified gas enters through the exhaust pipe of the cyclone, and the sludge into the hopper to collect it from the cyclone, and then into the common sludge collector.

In FIG. 1 shows a General view of the bubble-vortex apparatus of wet dust collection; in FIG. 2 - axonometric projection of a parabolic swirl.

The wet-dust bubble-vortex apparatus contains a cylindrical chamber 1 with an inlet pipe 2, an axial sprinkler 3, perforated with holes of small diameter 4 and muffled from the output end. A pair of swirlers 5 is sequentially installed in the cylindrical chamber 1, the swirl at the inlet of the gas flow rigidly fastened to the axial sprinkler 3, and at the outlet the swirl is made with a central hole equal to 0.2 of the diameter of the cylindrical chamber and connected to the walls of the cylindrical chamber 1, forming a gap for the passage of a gas stream to the central zone of the apparatus.

The guide vanes 6 of the parabolic swirler 5 are curved along the helical surface and form curved confuser channels 7 (Fig. 2). The cylindrical chamber 1 is connected with an inclination to the cyclone 8 using the flanges 9 and 11 and the pipe 13 of the tangential entry into the cyclone. Dispersed particles are removed by means of a sludge overflow pipe 10 into a common sludge collector 16. A liquid inlet 12 with a nozzle 15 is installed in the nozzle 13 to flush the mobile foam generated from the rotating gas-liquid flow.

The cyclone 8 is made in the form of a wet dust collector, in the upper part of the casing of which an annular sprinkler 17 with at least three nozzles 14 is mounted, connected by a pipe 18 to a fluid inlet 12 for flushing the resulting mobile foam. The purified gas enters through the exhaust pipe 20 of the cyclone 8, and the sludge into the hopper 19 to collect it from the cyclone 8, and then into the sludge collector 16.

Bubble-vortex apparatus for wet dust collection is as follows.

Dusty gas is supplied to the cylindrical chamber 1 through the inlet pipe 2. At the same time, an irrigation liquid enters the axial sprinkler 3, which disperses throughout the entire volume of the cylindrical chamber from the sprinkler openings. A gas containing solid and gaseous impurities moves along the walls of the cylindrical chamber 1 and is separated by flows through a swirler 5. Continuing the translational motion, these flows deviate from the horizontal direction along the trajectory of the parabolic profile and acquire acceleration in curvilinear confusor channels without the growth of turbulent and transverse pulsation.

After that, the gas flow bends around the swirl at the inlet, changing the direction of movement, and begins to rotate in the gap between the swirls, forming a turbulent gas-liquid layer (moving foam). Reaching the hole in the swirl at the outlet, the gas passes through it and is removed from the apparatus. The separated sludge is washed off by the liquid and, by tilting the cylindrical chamber 1, is transported through the sludge overflow pipe 10 to the sludge collector 16. A liquid inlet with nozzle 15 is installed in the nozzle 13 to flush the mobile foam generated from the rotating gas-liquid flow. Subsequent separation of the suspension takes place in cyclone 8, from where the sludge also enters the sludge collector 16. The curvilinear confusor channels formed by the swirl blades are close in profile to the parabolic spiral, which is most appropriate because it is possible to form profile contours without jumps in curvature, causing an increase in energy loss.

Thus, by installing in the apparatus a pair of swirls made in the form of an elliptical paraboloid, the guide vanes of which are curved along the helical surface, the formation rate of a turbulized gas-liquid layer is increased, which in turn leads to the formation of a moving foam, part of which is immediately discharged into the sludge collector 16 of the apparatus, and part is additionally passed through cyclone 8 with sedimentation in its hopper 19, and then into a common sludge collector 16.

The organization of the rotational motion of a gas-liquid flow by passing it through parabolic swirls with a certain tangential velocity component is the main factor in the stabilization of the foam layer by creating the required level of centrifugal forces, which allows for an efficient gas cleaning process.

The increase in gas cleaning efficiency is also due to an increase in the level of rotational speeds in the gap between the swirls, where the turbolized gas-liquid layer receives additional rotation, as well as the elimination of secondary vortices, thereby reducing the hydraulic resistance of the device. The loss of gas pressure at a speed of 20 m / s is not more than 300 Pa. The gas cleaning efficiency is achieved within 93 ÷ 97%. The proposed bubble-vortex apparatus with parabolic swirlers and a cyclone of wet dust collection allows to increase the efficiency of gas purification and improve environmental protection.

Claims (1)

A wet dust collection bubble-vortex apparatus containing a cylindrical chamber with an inlet pipe, a sludge flow pipe into a sludge collector, an axial sprinkler perforated along the entire length with small diameter holes and muffled from the outlet end, the cylindrical chamber is equipped with a pair of swirlers installed in series, the first swirl swirl rigidly bonded to the axial sprinkler, and the second swirl along the gas is made with a Central hole and connected to the walls of the cylindrical chamber, forming a gap for passage waiting for the gas flow to the central zone of the apparatus, while the swirls are made in the form of an elliptical paraboloid, the guide vanes of which are curved along the helical surface and form curved confuser channels, while the cylindrical chamber is connected with an inclination to the cyclone using flanges and a tangential inlet into the cyclone, this removal of dispersed particles is carried out using a pipe flowing sludge into the sludge collector apparatus, characterized in that the cyclone is made in the form of a wet dust collection apparatus, in the nozzle of the tangential inlet into the cyclone, a fluid inlet with a nozzle is installed to flush the movable foam generated from the rotating gas-liquid flow, and in the cyclone in the upper part of the body there is an annular sprinkler with at least three nozzles connected by a pipe to the fluid inlet to flush the resulting movable foam, In this case, the purified gas enters through the exhaust pipe of the cyclone, and the sludge - into the hopper for collecting it from the cyclone, and then into the sludge collector.

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