RU2330712C1 - Screen horizontal filter - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: filter contains a casing, inlet and outlet branch pipes, a sprinkler, filter elements made as rotary metal screens connected with the scroll, in its turn, connected via a bypass line with the inlet branch pipe and a hydraulic lock with a sludge pan to remove slime. The sprinkler represents a centrifugal injector made up of a casing with an inlet, a cover, a sealing gasket arranged between the injector casing and the cover, a spring set between the said casing and a swirler representing a cylindrical barrel turned upside down and arranged with a circular clearance relative to the injector casing. The swirler is provided with, at least, two rows of throttling orifices, every row is furnished with, at least, two tangential throttling orifices spaced regularly along the swirler circular wall. The casing lower part accommodates a calibrated taper bore injector insert representing a taper washer, the said calibrated taper bore being aligned with the swirler cylindrical surface and a taper reverse to that of the aforesaid insert taper washer.

EFFECT: higher-efficiency of dust separation.

2 cl, 3 dwg

Description

The invention relates to techniques for wet dust collection and can be used in chemical, textile, food, light and other industries.

The closest technical solution to the claimed object is a gas scrubber, known from the book of A.A. Rusanov. A guide to dust and ash collection. M .: Energoatomizdat, 1983, p. 113, Fig. 4.37 (prototype), comprising a housing, a pipe for introducing dusty gas, a pipe for exiting purified gas, an irrigation device and a sludge collector.

The disadvantage of the prototype is the relatively low efficiency of the dust collection process due to the underdeveloped spray surface of the liquid.

The technical result is an increase in the efficiency and reliability of the dust collection process by increasing the degree of liquid atomization by nozzles.

This is achieved by the fact that in a horizontal filter with rotating grids containing a housing, inlet and outlet nozzles, an irrigation nozzle and filter elements, which are rotating metal grids connected to a coil connected by a bypass pipe with an inlet nozzle and a water trap for draining sludge into the sump , the irrigation nozzle is made in the form of a centrifugal nozzle, consisting of a housing with an inlet, a cover, a sealing gasket between the housing and the cover, a spring, located between the lid and the swirl made in the form of an inverted cylindrical cup mounted relative to the housing with an annular gap, and at least two rows of throttle openings are made in the swirl, and at least two evenly spaced annular are made in each row a tangential throttle aperture swirl wall, and a nozzle insert with a calibrated conical hole coaxial with a cylindrical surface vihritelya and conicity reverse taper conical insert washers.

In Fig.1 shows a General view of a horizontal filter with rotating grids, Fig.2 is a General view of the nozzle for spraying liquids, Fig.3 is a section aa of Fig.2.

The horizontal filter with rotating grids 3 contains an inlet pipe 1, in which the contaminated gas comes into contact with the water mist generated by spraying water with an irrigation nozzle 2. The support unit 7 of the drive 8 of the rotating screens 3 is located directly in the output pipe 9. Filtering elements, which are rotating metal mesh 3, move the particles on the surface of the mesh, and they are released from the air flow into the cochlea 6. Since part of the air with a high concentration of dust particles enters the cochlea, then is returned through line 4 to re-cleaning, and the slurry through the water seal 5 is given to the sump.

The centrifugal nozzle (Fig.2-3) consists of a housing 10 with an inlet 11, a cover 12, a sealing gasket 13 between the housing and the cover, a spring 14 located between the cover and the swirl 15, made in the form of an upside down cylindrical cup mounted relative to bodies 10 with an annular gap 16. At least two rows of throttle openings 17 are made in the swirl 15, each row has at least two throttle openings 17 evenly spaced along the annular wall of the swirl 15. In the lower the th part of the housing 10 is installed in the form of a conical washer nozzle insert 18 made of solid materials: tungsten carbide, ruby, sapphire with a calibrated conical hole 19, coaxial with the cylindrical surface of the swirler 15, and the hole 19 has the opposite taper with the conical washer of the insert 18.

A horizontal filter with rotating grids works as follows.

Dusty air enters the inlet channel into the inlet pipe 1 of the dust collecting unit. Here, the steam-dust mixture is in contact with the water mist generated by spraying water with an irrigation nozzle 2. Fine dust is mixed in a stream with dispersed water droplets. In this case, there is a collision of dust particles with droplets of liquid, as a result of which they coagulate. Next, the dust-and-air mixture passes through the filtering elements, which are rotating metal grids 3. In the space between the grids, an additional turbulent mixing of dusty air with water droplets and dust particles fall on the threads of the second grid. Coarse dust particles due to inertial forces are released from the flow on the threads of rotating grids. Since two forces act on the settled particle: the aerodynamic drag force, which tends to drag the particle along the flow, and the centrifugal force, under the influence of which the particle is discarded in the radial direction, the particle tends to move in the direction of their resulting one. The latter moves the particles along the surface of the nets, and they are released from the air stream into the cochlea 6. Since part of the air with a high concentration of dust particles enters the cochlea, it is returned via line 4 for re-treatment, and the sludge is discharged through the hydraulic trap 5 to the sump. A centrifugal nozzle for spraying liquids works as follows.

The fluid is fed through the inlet 11 into the annular gap 16, from where to the swirl 15 through the throttling holes 17 tangentially located to the inner surface of the swirl 15. The rotating fluid flow from the swirl 15 exits through a calibrated conical hole 19 of the nozzle insert 18, resulting in a spray of liquid whose root angle is determined by the angle of inclination of the conical surface of the hole 19.

When the average diameter of the hole 19, which is in the range of 2.5 ... 3.5 mm, and the pressure supplied through the inlet 11 of the liquid under a pressure of 6 ... 9 MPa, atomization of 400 to 1000 kg / h of liquid is provided. The nozzle is easy to manufacture and maintain.

At an initial dust concentration of 2.5 × 10 ⁻³ kg / m ^{3, the} degree of filter cleaning was 98.6%.

Claims (2)

1. Horizontal mesh filter containing a housing, inlet and outlet nozzles, an irrigation nozzle and filter elements, which are rotating metal grids connected to a scroll connected bypass pipe with an inlet nozzle and a water trap for removing sludge from a sump, characterized in that the irrigation the nozzle is made in the form of a centrifugal nozzle, which consists of a body with an inlet, a cover, a gasket between the body and the cover, a spring located between a neck and a swirl made in the form of a cylindrical cup turned upside down, mounted relative to the housing with an annular gap, and at least two rows of throttle openings are made in the swirl, at least two uniformly spaced along the annular swirl wall are made in each row tangential throttle holes, and a nozzle insert made in the form of a conical washer with a calibrated conical hole coaxial with the cylindrical surface is installed in the lower part of the housing swirl, and taper, inverse taper of the conical washer of the liner. 2. The horizontal mesh filter according to claim 1, characterized in that the nozzle nozzle insert is made of solid materials: tungsten carbide, ruby, sapphire.

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