SU889052A1 - Gas cleaning device - Google Patents

Description

; - I the invention relates to gas cleaning and can be used, for example, to dedust the waste gases of rotary kiln kilns and aspiration air of mills in the cement industry, as well as; g other industries. A device for gas purification is known, which includes inlet and outlet chambers with nozzles. supply and removal of gas and a container with a granular: filtering material, spring-loaded rods with combs and vibrators Ш. In the known device, the regeneration of the granular filter material is carried out by vibrating it with the help of bushing currents with combs forming a spatial vibrating frame. However, in this case, the elevation of the layer of granular material is not equally distributed over the cross section, the layer is knocked off in one direction. The regeneration proceeds inefficiently, the hydraulic resistance of the gas cleaning device and the concentration of dust in the purified gas increase. The presence of a massive vibrating frame leads to the need to install sufficiently powerful vibrators. The purpose of the invention is to increase the service life and improve the regeneration efficiency of the granular filter material. This is achieved by the fact that in a gas cleaning device, which includes an inlet and outlet chambers with gas supply and exhaust nozzles and a container with granular filtering material, spring-loaded rods with combs and vibrators, the container is equipped with guides, which are connected to it, and The vibrators are fixed at the opposite ends of the spring-loaded rods, while the combs are at least 3/4 sh 1 hundred 1 grains of filter material.

FIG. 1 shows the device, section g in FIG. 2 - section AA Ij in FIG. 3 - section BB one.

The device includes an inlet chamber 1 with two nozzles 2 for gas supply, transport slope 3 and nozzle 4 for dust removal, a container 5 with guides 6 for reciprocating movement, a mesh 7, a granular filter material 8 and

agitator 9, consisting of a set of baby 1O, fixed on one

or several spring-loaded rods 11, and from two vibrators 12, and an output chamber-13 with two nozzles 14 for venting gas. Moreover, the prts individual operation of the device is silenced by a single pipe 2 and 14 by the plugs 15,

The device works as follows.

Dust-laden gas enters the inlet chamber 1 through nozzle 2. Due to the abrupt change in the flow velocity, part of the dust accumulates in chamber 1 and is transported due to a slope from the chamber. Thinner cleaning is carried out with a layer of filtering granular material 8 located on the mesh 7. In the course of the fillets, the layer is clogged with dust and it becomes necessary to restore its filtering properties, i.e., regeneration. During regeneration, the vibrators 12 through the rods 11, on which a set of combs 10 in the layer of filtering particulate material 8 are fixed, cause the agitator 9 to vibrate. The vibrations through the combs 10 are transferred to the filtering granular material 8, in which the adhesion forces between dust and the BL material itself. At the same time, the porosity of the layer varies (the channels between the grains are modified). Accumulated dust in the channels spills under the action of gravitational forces through the layer and the grid 7 into the chamber 1 and along the transport slope 3 is removed from the device through the nozzle 4, the purified gas enters the chamber 13, from there through the nozzle 14 is either released into the atmosphere, or used for further technological purposes. The device is simple in design, reliable in operation, more affordable for repairs and universal.

To increase the filtering surface, to ensure the cyclical regeneration and constant operation of the device, it can consist of 2 or more units, for which the second nozzles 2 and 14 are provided. For a more refined gas cleaning, the devices can be connected in series, and filtering - in parallel.

The height of the combs 10 is taken into account in order to have at least 1/3 of the layer of granular filtering material above them, and between the grid 7 and the comb 10 there is a gap necessary to preserve the grid. The distance between the combs 1O and their teeth is chosen according to the results of research within 13 to 2 o of the grain diameters of the filter material, which ensures the same height of the layer of material over the entire cross section of the filter, intensive circulation of the grains and, accordingly, effective regeneration. The mass of the vibrating elements is significantly reduced, which leads to a decrease in the required power of the vibrator. From one to three rods can be attached to the vibrators 12 based on the strength conditions of the dies and their attachment design.

The industrial design was tested at cement plants and showed high efficiency of the device and reliability of the regenerative mechanism. The economic effect of using two devices for gas cleaning on one cement silo will be more than 100 thousand rubles. in year.

Claims (1)

1. USSR author's certificate No. 390815, cl. B 01 D 46/30, 1972. IaCh1SHPMSH