SU1713621A1 - Filter for cleaning gases from dust - Google Patents

Abstract

The invention relates to the purification of gases from dust, in particular to dust separators with fabric filter sleeves, and can be used in the chemical, metallurgical, cement and other industries. The goal is to increase the specific filter surface and increase the reliability of the filter. It contains a housing with nozzles and a flap for entering the dusty and clean gas outlet, a bunker, a vertical fabric sleeve, the lower end of which is fixed on the distribution grid, and the upper one is closed and mounted with the possibility of vertical movement along the guide. The latter is installed along the axis of the sleeve and is made in the form of a rod and a pipe, with the upper end of the rod attached to the upper end of the arm, and the lower end freely entering the pipe. 4 IL. SOCIALIZATION The invention relates to the purification of gases from dust, in particular to dust separators with fabric filtering sleeves, and can be used in the metallurgical, chemical, cement and other industries where cleaning of finely dispersed gas dust is required. surface and increase the reliability of the filter in operation. Figure 1 shows the filter, a general view; figure 2 - node I in figure 1; in FIG. 3, node II in FIG. 1, • in FIG. 4 - section A - A in FIG. 1. The filter includes a housing 1, a nozzle 2 for the inlet of dusty gas, a nozzle 3 for the exit of purified gas, a hopper 4 for trapped dust and a filter sleeve 5 attached to the lower end of the distribution grid 6 on the nozzle 6 7. The upper end of the filter fabric sleeve 5 is muffled and fixedly to the upper end of the rod 8, and the lower end of the rod freely enters the pipe 9 (FIG. 3). The rod 8 and the tube 9 constitute a guide. The pipe 9 is strictly installed along the vertical axis of the filter fabric sleeve 5 by means of a guide sleeve, 10 and an auxiliary sleeve 11, in which the lower end of the pipe 9 is fixed / 1en with a slot and a wedge (Fig. 2). they rest on the rods 12 and 13, which are fixed inside the distribution grill 7 nozzle 6. A choke 14 is installed at the purified gas outlet nozzle 3 to shut off the gas flow. The filter works as follows.

Description

The dusty gas through the inlet 2 of the inlet of the dusty gas enters the interior of the filter fabric sleeve 5, is cleaned of dust and through the outlet 3 of the outlet of the purified gas. You are led out of the filter.

As it accumulates on the filter fabric and when a certain hydraulic resistance is achieved, it is regenerated. For this purpose, the shut-off valve 14 blocks the gas flow. Due to the depressurization of the gas flow onto the filter fabric sleeve 5, its upper end together with the rod 8 is lowered through the pipe 9 to the upper end of the pipe. The filter fabric sleeve 5 is squeezed along its entire length, as a result of which the dust layer on the fabric breaks down and the dust falls into the hopper 4. Opening the shutter 14 resumes filtration of the dusty gas. At the same time, the upper end of the filtering sleeve 5 under the pressure of the gas flow together with the rod 8 rises through the pipe 9, the filtering sleeve 5 assumes a vertical position and saves it during the entire filtration cycle. In this position, it is necessary for the lower end of the rod 8 to be lowered to an insignificant depth into the pipe 9 in order to avoid the filter sleeve 5 deviating from the vertical axis.

In the filtering process, filter performance, hydraulic resistance of the filter cloth and residual dust content in the purified gas are monitored. The upper end of the sleeve during the regeneration of the filter cloth is lowered by 1 - 1.3 m. The inner diameter of the tube 9 is 10 mm, the diameter of the rod is 8-5 mm,

As a result of applying the proposed filter design, an increase in the filter surface in the same filter volume from 2.0 to 2.8 m is obtained.

The average filtration rate is 1.4 m / min, the residual dust content in the purified gas is 20-25 mg / nm.

The technical and economic effect of the proposed filter was obtained by increasing the filter surface per unit volume of the filter.

Replacing the guide rod with the tube provides an increase in the specific filter surface per unit volume of the filter. In addition, there is an additional regeneration of the filter fabric due to its contact with the rod of the proposed filter.

The optimal depth of lowering the upper end of the sleeve was experimentally established during regeneration of filter cloth, which is one third of the sleeve length. It is impractical to lower the sleeve to a greater depth, since the increase in filter performance is not achieved, and the degree of deformation of the fabric increases, causing its increased wear.

Claims (1)

Invention Formula A gas cleaning filter for dust, comprising a housing with nozzles for entering the dusty and clean gas outlet, a flap, a bunker and a vertical fabric sleeve, the lower end of which is fixed on the distribution grid, and the upper one is plugged and mounted for vertical movement along that, in order to increase the specific filter surface and increase filter reliability in operation, the guide is installed along the axis of the sleeve and is made in the form of a pipe and a rod, the upper end of which is attached captive to the plugged part of the sleeve, and the bottom is installed inside the pipe. J P Ak J. o) (V Phases. g FIG. four