SU1646584A1 - Apparatus for biological purification of gases - Google Patents

Abstract

The invention relates to the wet cleaning apparatus for industrial process gases from mechanical and harmful gaseous components of the contaminants, can be used in the chemical, metallurgical, food, microbiological, woodworking and other industries and makes it possible to increase the degree of gas purification by means of the invention. wet cleaning of industrial process gas from mechanical and harmful gaseous contaminant components and can find nenie in chemical, metallurgical, food, microbiological, derevoobrabratyvayuschey and other industries. The purpose of the invention is to increase the degree of gas purification due to turbulence and dispersion of a liquid by gas, turbulization and dispersion of a liquid by gas. The device contains tangential gas inlet and outlet nozzles, a cylindrical scrubber, coaxially placed inside it, a hermetic aeration tank with an internal partition, a sump, a drip tray and a sprayer. The gas moving in a spiral between the walls of the scrubber and the aerotube is cleaned of mechanical impurities and washed with water with an additional sprinkler located above the sump. The gas enters the aerotank through a flue located coaxially inside the aerotank and is evenly distributed along the height of the liquid layer by a cone-shaped reflector with guide plates. Floating turbulizing nozzles made of inert material are placed between the partition and the reflector. The regeneration of the fluid is carried out by microorganisms-bomodestructors in it, during airlift circulation. Outlet connections are provided to remove excess biomass and mechanical impurities. 3 Il The figure 1 shows the proposed device, a longitudinal section; figure 2 is a section a - a in figure 1; in FIG. 3, node I in FIG. The device contains a cylindrical scrubber 1 with a nozzle 2 tangential gas inlet, a centrifugal droplet separator 3 with an outlet nozzle 4 for gas located in the upper part, a nebulizer 5, a sealed aeration tank 6, placed coaxially inside the scrubber with the formation of an annular gap above the sump 7, additionally 00 4

Description

teller sprinkler 8, located above the sump. Inside an airtight aeropole, there is an additional flue 9 coaxially with it, a cone-shaped reflector 10 mounted on it, located apex of a cone downwards and fitted with guide plates 11, an internal partition 12 made in the form of a truncated cone with a perforated upper part. Moreover, the internal partition is installed with a gap relative to the bottom of the aerotank and guide plates. Between the internal partition and the reflector are placed turbulizing floating nozzles 13 of inert material in the form of a shore, jurassic, segment, cone, truncated cone, and cylinder in a floating state on the liquid surface. In the lower part, the aeration tank is provided with a nozzle 14 to discharge excess mass by a circulation pump 15. The settling tank 7 of the annular plate 16 is divided into the chamber 17 for the clarified liquid and the regeneration chamber, which allows to eliminate the clogging of the additional irrigator through the nozzle 18 by a circulation pump 19. Settled the bottom of the sump mechanical impurities are removed through the pipe 20

The device works as follows.

The contaminated gas enters tangentially through the nozzle 2 into the cyclonic part of the scrubber 1 and moves downward in a spiral. Large dust particles and other mechanical impurities are pressed to the inner wall of the scrubber by centrifugal force and settle in the sump. Above the sump 7, the gas is flushed with water from an additional irrigator 8. In this case, trapping of fine mechanical impurities and partial absorption of gaseous contaminants occurs. Next, the moisture-saturated gas enters the cone-shaped reflector 10 through the additional gas duct and is evenly distributed along the channels of the guide plates 11, which form the annular nozzle. In the annular nozzle, the gas accelerates to a speed of 30–50 m / s, captures fluid and a floating nozzle in the upper part of the aerotank, forming a highly turbulent fluidized bed of gas and liquid with microorganisms. Regenerated liquid is supplied to the same cleaning zone with a spray 5. The gas thus purified, after trapping the splashes in the centrifugally m droplet separator 3, is discharged through the pipe 4 to the atmosphere. Carried away by the gas flow in the upper part of the aero tank liquid through the perforated part of the internal partition 12 enters the

the lower part of the aerotank 7 and due to the airlift effect created by the gas flow in the annular nozzle, circulates along the internal partition. This results in the oxidation of the absorbed components of contaminants from the liquid with the help of microorganisms. Thus, the gas to be purified in the annular nozzle and in the fluidization zone is in contact with the regenerated liquid, which improves the degree of purification and allows the adsorbent to be reused. Excess biomass generated during operation of the device is output periodically or continuously through the nozzle

5 14 by means of a pump 15. With the same pump, liquid with microorganisms is supplied to the upper part of the aero-tank for irrigation.

Mechanical impurities that were

0 are caught in the cyclone hey part and above the sump when irrigated with water, enter the sump 7, where they precipitate and are discharged through the nozzle 20. The clarified liquid enters through the annular plate 16 into the chamber 17 and recycles through the nozzle 18 by pump 19.

To check the performance of the proposed device, its model version with a diameter of

0 azrotenkaO, 1 m and scrubber 0.12 m. The purified gas contained mechanical impurities in the form of dust 1.5-2 r / m3 and phenol vapors 40 - 55 mg / m3. The gas temperature at the entrance to the apparatus is 30 - 35 ° C.

5 When using this device, the gas purification degree is achieved up to 99.8 - 100%, which improves the purification degree by 7 - 10% compared to the prototype, while reducing energy and material costs by 30 - 40% due to a decrease in hydraulic resistance and using the gas to be purified as an aerating, turbulizing and recirculating agent, as well as regenerating liquid with the help of microorganisms - biodestructors. As a result, the sanitary condition of the air is improved, which has a positive effect on health and productivity.

0 people, as well as the surrounding ecological system.

Claims (1)

Apparatus of the Invention A device for biological purification of gases, including a scrubber with nozzles, a droplet separator located in its upper part, an aerotank with a partition, a settling tank, a clarification chamber, a biomass sprayer, a liquid sprinkler, a circulation loop, inlets and outlets for phases, characterized by , that, in order to increase the degree of gas purification due to turbulence and dispersion-. neither gas nor liquid, the device is equipped with a flue located coaxially inside the aerotank, a cone-shaped reflector with guide plates mounted on the flue top top down, the liquid sprinkler is located above the settling basin, and the aeration tank is made airtight and coaxially with the scrubber inside it to form an annular space above the settling basin, the aerotank partition being made in the form of a truncated cone with a perforated upper portion protruding above the fluid level and set at a distance from the bottom of the aerotank and guide plates, the lower edges of which are located below the fluid level . 4-7 Cleaned Ј-1gas T ochenchenky gae 1 Gas & gas A - A 12 Fig.Z