SU921629A1 - Method and apparatus for cleaning dust-laden gas - Google Patents

Description

(S) METHOD FOR CLEANING DUSTED GAS AND DEVICE FOR ITS IMPLEMENTATION

I

The invention relates to the separation of dispersed particles from a gas using an electrostatic effect and can be used in the construction industry. rials, in the heat and power, metallurgical and other branches of the national household.

A known method of cleaning dusty gases includes the action of a strong electric field on charged particles and the oncoming movement of the precipitating element with respect to the moving particles t1.

The disadvantage of this method is low gas cleaning efficiency.

A device for cleaning dusty gas is known, comprising a housing with inlet and outlet nozzles, collecting electrodes, whose elements are arranged in rows across

gas flow at the inlet and along the rest of the body, and corona electrodes located between the rows of elements of the C21 precipitation electrodes.

A disadvantage of the known device is the low efficiency of the cleaning process.

The closest technical

The essence and the achieved effect is the method of cleaning the dusty gas, including the flow of gas into an electric field of high intensity and periodic removal

, 5 precipitated dust from the electric field 31.

Claims (3)

A device is known that includes a housing, inlet and outlet nozzles, 2 (j of gas to be cleaned, gas permeable box-shaped collecting electrodes between the discharge electrodes, and an NW collecting electrode electrodes for dust removal. A disadvantage of the known method and apparatus is the efficiency of the dust-gas cleaning process. Purpose of the invention, an increase in the gas cleaning efficiency by reducing the gas velocity and increasing the particle drift velocity. This goal is achieved by providing partial suction gas and in the direction that does not coincide with the direction of the main dust-gas flow, for which the box-shaped collecting electrodes are equipped with a device for gas suction, made in the form of nozzles placed in the end walls of the precipitation and connected to the gas collector.The filter material is placed on the surface of the collecting electrodes. shows the device, a cross-section; Fig. 2 shows a variant of its execution, a cross-section; 4) Ig. Fig. 3 shows aa-a on the fi of t and 2. The device consists of a housing 1 with internal precipitating electrodes 2 placed inside it. boxes, and negative-polarity corona electrodes 3, which are connected to the negative pole of the power source (not shown). Precipitation cells 2 and the positive pole of the power supply are grounded (not shown Pipe nozzle k is used to enter the dusty gas, and pipe 5 for the cleaned gas flow. Precipitation electrodes 2 are equipped with pipe nozzles 6 for partial suction of gas from the closed cavity "Pipe nozzles 6 are connected to a gas collector 7, intended for the extraction of the aspirated part of the gas. An embodiment of the device is characterized by the presence of a pre-charge zone for particles in a corona-discharge field formed by the discharge electrodes 3 and flat grounded electrodes 8. In the deposition zone of this device, electrodes 9 of negative polarity are made flat. Precipitation electrodes 2 have a gas-permeable filtering electrically conductive deposition surface 10 which may be formed, for example, by a filter cloth fixed between two metallic grids or a layer of granular Material that fills the spaces between the grids (not shown. The filter surface 10 creits onto the rigid frame in such a way that it forms a duct - collecting electrode 2 with a closed cavity 1 1, communicating with nozzles 6, the device operates as follows. The gas to be cleaned enters through the nozzle k in the deposition zone between electrodes 2 and 3, where the suspended dust particles are separated from the gas stream. The purified gas passed through the interelectrode space, through the pipe 5 is brought out. A part of the gas as it moves, or to the nozzle 5 is sucked through closed cavities. The electrode 2 is connected by means of nozzles 6 to the collector 7. from where it is led out of the device. Upon reaching the optimal dust layer on the electrically conductive, gas-permeable, filtering surface 10, the electrodes 2 are regenerated by periodically feeding compressed air pulses into the cavity 11 through nozzles 6. Corona electrodes 3 are also periodically regenerated (there is no electrode system shown in the drawing). In the version of the device, pre-charging of particles in the corona discharge zone is provided, and the deposition of dust particles occurs in an electrostatic field arising between the flat electrodes 9 of negative polarity and the electrically conductive surface 10 of positive polarity electrodes 2. Thus, the implementation of the partial suction of gas allows to increase the efficiency of the cleaning process. DETAILED DESCRIPTION OF THE INVENTION A method for cleaning a dusty gas, including supplying a gas flow to an electric field of high intensity and periodically removing precipitated dust from an electric 5 field, characterized in that, in order to increase the effect of gas cleaning by reducing the gas velocity and increasing the drift velocity of particles, Partial suction of gas is carried out in a direction that does not coincide with the direction of the main dust-gas flow. 2. A device for cleaning dusty gas, including a housing, gas inlet and outlet gas clearing gas-permeable box-shaped collecting electrodes, between the corona electrodes and a system for removing dust from collecting electrodes, characterized in that the box-shaped collecting electrodes are equipped with a gas suction device made in the form of nozzles, 29 placed in the end walls of the collecting electrodes and connected to a gas collector. 3. The device according to claim 2, characterized in that the filtering material is placed on the surface of the collecting electrodes. Sources of information taken into account during the examination 1. USSR author's certificate number f 56638, cl. B 03 C 3/00, 1975. 2. USSR author's certificate number 629981, -kl. B 03 C 3/09, 1978. 3. Handbook of dust and ash collection. Ed. A.A. Rusanov M., Energie, 1975, pp.189-191, fig.6-5.6-7 (prototype).  Apr J - 7 --AXJ M- AJ V T ir .  // 1 f it / 5 years H 2 0ik