SU1255174A1 - Apparatus for cleaning a gas - Google Patents

Description

one.

This invention relates to a wet scrubbing technique and can be used as an absorber in chemical industry.

The purpose of the invention is to increase the gas cleaning efficiency due to the increase in time and surface of the contact of the phases, as well as to reduce the consumption of washing liquid.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The gas cleaning device includes a housing 1 with a tangential gas inlet nozzle 2 and an outlet nozzle 3 and nozzles 4 and 5 for removing sludge. Inside the housing 1 are located, built external 6 and internal 7

NIC Vane Swirlers, mustache

mounted with a gap of 8 one in relation to the other. In the gap 8 there is a distribution device 9 in the form of two rigidly coupled truncated cones 10 of equal height, to the top of which is attached a ring collector 11 with nozzles 12.

The vortex separation shell 13 is made in the form of a truncated cone with a large base inclined at an angle about the large base. In the upper part, the shell 13 is provided with a multi-blade cylindrical grating 14. Bbmie a large base of the shell 13 into it — there is a perforation 15 for passage of fluid to the internal distributive truncated conical element 16; top down.

Above the gas inlet fitting 2, a truncated cone 17 is placed, on a smaller base, with a gap 18, a diffuser 19 is placed.

The device works in the following way.

Dust-laden gas through a tangential choke 2 enters the device. Due to the centrifugal forces that arise, large solid particles are thrown onto the wall of the housing 1 and entrained with the liquid flowing down the wall into the lower part of the housing, from where the sludge is discharged through the fitting 4. Next, the gas with fine dust particles, having a rotational-upward motion, passes the ring a curtain of fluid flowing through the gap 18 between the diffuser 19 and the truncated cone 17 and disperse it.

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A portion of the fluid is centrifugally applied to the wall of the device and flows downward, while a part of the fluid along with the gas is carried in an upward movement. Passing the diffuser 19, the gas-fluid flow dramatically reduces its speed by increasing the flow area. The resulting velocity gradient between gas, dust and liquid contributes to the inertial sedimentation of dust on liquid droplets and the intensive turbulization of the entire flow by maintaining its twist.

In this case, there is an intensive crushing of liquid films flowing from the distributor 9. A highly developed and renewing contact surface of the phases, contributing to a significant increase in efficiency. The coagulated particles of aerosols and dust, under the action of centrifugal forces, are thrown onto the wall and flow down the inner surface of the truncated cone 17 to the diffuser 19, from where they flow down through the gap 18 in the form of a film.

Next, the turbulized flow is divided into two equal flows due to the equality of the flow sections of the outer 6 and inner 7 entangles and enters the vanes of the swirlers, where the gas-droplet flow interacts with the blades, resulting in inertial sedimentation of liquid and dust particles on them. which, under the influence of gravity, flow down the vanes S, the gap 8 between the swirlers and then in the form of a film by means of a distributor are fed into the upward flow under the swirlers, forming a contour circulating i; ii.

 swirlers 6 and 7, the interaction of two equal opposing flows. A zone of highly turbulized, constantly mixing flow with a continuously renewed contact surface of the phases is created. :

Placing the nozzles 12 in the upper part of the distributing devices 9 with the spray nozzle upwards ensures the penetration of the highly turbulized zone of flow displacement with a finely dispersed liquid, which

not only significantly increases the efficiency of the cleaning process, but also reduces the hydraulic resistance due to the ejection of the gas phase by the sprayed liquid.

An additional part of the liquid is supplied to the mixing zone through a perforation in the vortex separation shell 13 by means of a distributive conical element 16.

Such a constructive solution ensures the supply of a significant amount of the liquid phase to the zone of the most turbulent flow, which significantly increases the efficiency of gas cleaning from dust and aerosols.

Next, the gas-liquid flow occurs through the multi-hazard grid 14 where it acquires a rotational motion. Under the action of centrifugal forces, phase separation occurs. Liquid with solid inclusions is thrown onto the wall of the apparatus and flows downward, and the purified gas leaves the apparatus.

Since the larger base of the vortex separating shell 13 is inclined at an angle o4, the rotating liquid stream carries the sludge into a quieter zone to the top of the corner, from where it is discharged through fitting 5. Part of the clarified liquid returns to the mixing zone through perforation 15.

Thus, due to several zones of phase contact with a highly developed highly turbulized surface and high irrigation, the problem of increasing the efficiency of dust collection can be solved, and the presence of three circulation zones significantly reduces the amount of liquid phase consumed for irrigation.

The equality of the flow sections of the swirlers in the device ensures the fulfillment of the condition of equality of the gas velocities in the interscapular channels of the swirlers 6 and 7 ..

When the gas velocities are equal in the vortexes, the same hydrodynamic conditions of liquid separation to the blades and their supply to the distribution device 9 are provided.

Dusty 103

yf- / 4

Editor S.Patrusheva

Compiled by O. Bekker Tehred L. Serdyukova

Order 4741/6 Circulation 663 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,,

Production and printing company, Uzhgorod, Projecto st., 4

2

Proofreader V. But ha

Claims (2)

1. DEVICE FOR CLEANING GAS, comprising a housing with inlet and outlet fittings, inside of which conical blade vortexes are coaxially located, with the outer swirler facing down with the smaller base and the upside down with the smaller base, an annular collector with nozzles is placed at the bottom of the swirls, and in the upper one is a vortex separation shell, cast in that, in order to increase the efficiency of gas purification and reduce the flow rate of the washing liquid by increasing the time and phase contact surface, less The swirl of the external swirl is placed with a gap with respect to the larger base of the swirl, and the device is equipped with a switchgear arranged in the gap and made in the form of two rigidly conjugated truncated cones of equal height, to the top of which there is an annular manifold with nozzles placed above the inlet fitting with the smaller base down a truncated cone and a diffuser located in the smaller base of the truncated cone, and the vortex separation shell is made in the form of a truncated cone with a large base, installed with an inclination to its axis, and equipped with a multi-blade cylindrical grate. 2. The device according to claim 1, about t and - characterized in that the bore sections of the coaxial conical swirls are equal, and the gas inlet fitting is installed tangentially to the housing. "" -SU. ,, · 1255174L A1 1.255174