SU1518541A1 - Arrangement for cleaning ventilation air - Google Patents

Abstract

The invention relates to the mining industry. The goal is to increase work efficiency by adjusting the cleaning process depending on the fractional composition of dust. A chamber (K) 1 with a perforated conical dead end part is placed in the casing 3. The latter is connected via a vacuum system 5 to a supply pipe 6 of dust-laden gas 6 having a sprinkler. Inside K1 there is a concentric shell in the form of a truncated cone 10 with the possibility of longitudinal movement along the guides 9. The shell is located with its small base towards the dead end part K1. The tapers of the latter and the shell are the same. The diameters of the smaller base of the truncated cone of the shell are equal. The casing 3 is connected to the sludge collector 13. When the dusty air is supplied through the pipe 6, the liquid is supplied to the sprinkler and the vacuum system 5 is turned on. The dust flow enters the dead end part K1 where part of the dust is wetted and removed as sludge and the other part of the dust is through perforation K1 enters the casing 3 and is caught. The purified air exits through the nozzle 8. When a large fraction of dust enters, the shell is moved to the left position, and for the small fraction to the right. This increases the dust suppression efficiency of the corresponding dust fraction. 1 hp f-ly, 3 silt, 1 tab.

Description

The invention relates to the mining industry and can also be used in any industry where wet dust suppression methods are applicable.

The purpose of the invention is to increase the working efficiency by adjusting the cleaning process depending on the fractional composition of the dust.

FIG. 1 shows the device section; in fig. 2 - a fragment of the conical section of the chamber, axonometric; in fig. 3 - scheme of the gas cleaning process.

A horizontal deadlock chamber 1 with a length of 3000 mm and a tapered section is made in the duct network of the ventilation system of the shot-blasting chamber. lump length of 1650 mm and a taper of 60 degrees, and a cylindrical section. Moreover, in the section with a length of 1500 mm of the conical part of the chamber 1, perforations 2 are made with a hole diameter of 5 mm and a density of 0.01.,,

The perforated part of the chamber 1 is placed in the cochlear casing 3, having in the upper part a tangential outlet 4 for sucking air that is connected to the suction inlet of the vacuum system 5. The pressure inlet of the vacuum system 5 is connected to the inlet 6 of the device. The sprinkler 7 is installed inside the supply pipe 6 coaxially with it and simultaneously with the dust-air flow. Moreover, the cut-off of the supply pipe 6 is located at a distance of 800 mm from the vertex of the conical part of chamber 1, and its diameter is 350 mm. The discharge nozzle 8 is a continuation of the annular gap between the outer surface of the inlet nozzle 6 and the inner surface of the cylindrical part of the chamber 1. Inside the chamber 1 along its longitudinal axis on the guides 9 there is a shell in the form of a truncated cone 10 of the same taper as the chamber 1 rigidly connected to the pull 11. In the lower part of the casing I and the casing 3 there are discharge pipes 12, lowered into the collection container 13 and forming with it a SL-lock. The ha 11 serves to move the truncated cone 10 to the extreme right or leftmost position along the guides 9. In this case, one end of the ha 11 is rigidly connected to the crosspiece 14, which

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The ram is fixed at the end of the truncated cone 10 on its smaller base, and passed through the gland seal 15 located at the apex of the conical section of the chamber 1, and at the other (outer) end has a fixed flywheel 16 for easy movement of the cone Yu

The diameter of the base of the conical part of the chamber 1, which is equal to 1680 mm, is in relation to the cut-off diameter of the supply pipe 6 (350 mm) 5: 1. This ratio is chosen because the airflow rates are equal at the outlet of the cut-off supply pipe in the gap between the outer surface of the cone 10 and the inner surface of the conical section of the chamber 1 at a constant air flow, which ensures uniform distribution of the aerodynamic characteristics of the dust extraction aerosol. Moreover, this ratio of diameters (5: 1) was obtained by aerodynamic design of the device, based on the equation of the non-parity of the flow.

In addition, the diameter of the smaller base of the truncated cone 10 is equal to the outer diameter of the cut-off of the supply pipe 6 to create a tight butt joint at its extreme right position, which allows you to direct the entire contaminated flow to the area of active dust collection

The device works as follows.

The contaminated air flow, the passage through the supply nozzle 6, is simultaneously irrigated with dispersed liquid from the irrigator 7. At the same time, the interaction of dust and liquid aerosols occurs, which is most pronounced in the conical part of chamber 1. Dust particles from the air flow with droplets, the liquids are removed to the sludge trap 13, and the remaining part of the dust-liquid aerosol is directed to the outlet nozzle 8 If dust particles of fine fractions (d, 50 µm) dominate in the polluted air flow, second cone 10 is mounted through rods 11 to the rightmost position against the inlet pipe 6. At present this

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aerosol particles are directed into the gap between the outer surface of the truncated cone 10 and the perforation 2, in the active zone of which they are trapped. If dust particles of large fractions (d 100 µm) with large kinetic energy, speed of movement and inertia predominate in the polluted air flow, the truncated cone 10 is set to the far left position (close to the conical section of chamber 1) by means of the pull 11. In this case, the perforation 2 is partially overlapped, which leads to a change in the aerodynamic and geometric parameters of the zone of its active action, and, consequently, to the most efficient capture and removal of particles of large fractions. A part of the air stream that has penetrated through the perforation 2 into the casing 3, is pumped by vacuum system 5 to the inlet pipe 6 for repeated dedusting, and the resulting sludge through the drain pipe enters the sludge trap. 13, from which the pump is removed to a drain. The maximum and minimum levels of pulp in the sludge collector 13 serve to prevent, respectively, overflow of the pulp and air leaks into the casing 3 from the outside.

The dependence of the fractional and integral dust collection efficiency on the position of the truncated cone 10 is given in the table.

In the table, the line is appropriate. the size of the dust particles is 0-1000 microns, illustrates the values of the integral efficiency of dust collection.

The use of the invention provides a high eff.

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capturing by small fractions up to 79-80%, in addition, the efficiency of capturing large fractions rises to 98.8%, and integral - to 99.8%. The device allows the fractional efficiency of dust collection to be adjusted depending on the prevailing sizes of dust particles in the polluted air stream.

Claims (2)

Invention Formula I. A device for cleaning ventilation air, including a supply pipe with irrigators, connected to a dead end chamber with perforation areas partially placed inside a casing, connected via a vacuum system to a supply pipe, diverting a branch pipe located at an acute angle to the longitudinal axis of the chamber, and the sludge tank, which is different from the fact that, in order to improve the work efficiency by adjusting the cleaning process depending on the fractional composition of the drink, it is provided with directing and, a frill cone located in a small truncated cone located a small base towards the dead end part of the chamber; the dead end part of the chamber is cone-shaped and the shell is coaxially aligned with the inlet pipe with the possibility of longitudinal movement along the guides shell and dead end of the chamber are made with the same taper. 2. The device according to 1, o, tl and the fact that the diameters of the smaller base of the truncated cone of the shell and the inlet pipe are equal to each other. Up to 50 50-100 37.3 40.8 75.1 79.8 53.6 60.2 Table continuation In the drain F Fig.Z Editor A Ogar Compiled by A. Gubaylovsky Tehred L. Serdyukova Proofreader V. Girn to Order 658A / 39 Circulation 410 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk na.B., 4/5 Production and Publishing Combine Patent, Uzhgorod, ul, Gagarin, 101 Pump water Subscription