SU1047500A1 - Bag filter filtering ultradispersed powders - Google Patents

Abstract

SLEEVE FILTER FOR FILTRATION OF ULTRADESPERT POWDERS, comprising a housing with a cooling jacket, filter sleeves, a collection powder with a spherical device, an overpressure valve, and a filter sleeve regeneration system, characterized in that, in order to increase the filter performance, the regeneration system of filter sleeves, which has been done, has been replaced with a filter replacement system, which has been removed. a disk fixed on the valve with holes, in each of which a sleeve is placed with a gap, and provided with an annular brush located along the perimeter of each hole of the disk, in which pile 1,3- Large Live 1.5 times the gap between the sleeve surface and the orifice edge of the disk. (L SP

Description

The invention relates to devices for cleaning gas from dust particles and can be used in various industries for collecting valuable dust-like component from gas streams, with its return to production.

A bag filter for filtering ultrafine powders is known, comprising a housing with a cooling jacket, filtering sleeves, a powder collector with a slider device, an overpressure valve ¹ and a filter bag regeneration system [1].

The disadvantages of this filter are the need to disconnect the filter chamber from the load at the time of the reg- nonration of the filtering surface; violation of the operating mode of the installation during the pulse regeneration of the installation due to the supply of pulsed gas in the opposite direction; the inability to control the regeneration modes in the process 2 of the filter; low degree of regeneration of the sleeves due to the · small acceleration of separation of dust particles from the surface of the sleeve; reduction in the service life of filter bags due to damage to the fabric material during torsion.

The purpose of the invention is to increase the filter performance.

This goal is achieved by the fact that in a bag filter for filtering ultrafine powders containing a body with a cooling jacket, filter bags, a powder collector with a vane device, an overpressure valve and a filter bag regeneration system, the filter bag regeneration system is designed as fixed on 3 a stock of a disk with holes, in each of which a sleeve is placed with a gap, and is equipped with a ring brush located along the perimeter of each hole of the disk, the pile length of which is 1.3-1.5 times greater earlier than the gap between the surface of the sleeve and the edge of the hole of the disk.

The lower limit is selected from the condition of effective collection of powder from the surface of the filter sleeve with a brush pile thickness of 0.05-0.18 mm and a mesh thickness of 0.15-0.25 mm. a With this ratio, a dense brush pressure is observed to the filter surface.

When the ratio of the gap to the length of the pile is more than 1.5, intense wear of the filter mesh is observed.

The drawing shows a bag filter. The filter consists of a sealed housing .1 with a cooling jacket, drive 2, rod 3, disk 4, cover 5, overpressure valve 6, brushes 7, sleeves 8, mixture supply valve 9, cooling supply valve 10, clamps 11, sliding device 12 and a collection of 13 powders.

The filter works as follows.

A mixture of gas and powder is supplied through the inlet of the mixture supply valve 9 to the filter housing 1. As the filter operates, the filtered gas passes through the sleeve 8 and exits through the overpressure valve 6, and settled powder is deposited on the outer surface of the bags 8, which increases the filter resistance. When the pressure under the cover 5 1 ati is reached, the disk 4 mounted on the stem 3 makes a reciprocating motion using the stem drive mechanism. An annular brush 7 in each hole of the disk 4 cuts off the powder formed during operation on the filtering surfaces of the nets. Hoses 8. The resulting product crumbles to the conical lower flange of the filter and through the gate system 12 enters the collector 13. The disk 4 consists of two plates (X18H10T steel ) with holes for sleeves 8, between which a brush with a pile is made, made of mesh (brand NP-2 GOST 6613-73). The thickness of the mesh is 0.15-0.25 mm. The diameter of the sleeve frame is 40 mm, the thickness of the filter cloth mesh is 0.15-0.25 mm, the gap between the surface of the sleeve and the edge of the disk hole is in the range 0.3-1.2 mm, mainly 0.9 mm.

The economic effect is achieved due to the continuous effective collection of powder and increase in 2-3 times the service life of the filter cloth.

The filter regeneration system provides 100% purification of an additional pulsed supply of regenerating gas, and allows maintaining a constant operating mode. Continuous cleaning of the filter surfaces makes it possible to reduce the time required to collect the powder by 40%. In addition, the use of the proposed filter allows you to simplify its design by eliminating twisting systems, mechanical shaking and reverse pulsed purge.

Claims (1)

HAND FILTER FOR FILTRATION OF ULTRA-DISPERSED POWDERS, comprising a housing with a cooling jacket, filter sleeves, a powder collector with a slider device, an overpressure valve and a filter bag regeneration system, characterized in that, in order to increase the filter performance, the filter bag regeneration system is made in the form of a disk with holes fixed to the rod , in each of which a sleeve is placed with a gap, and is equipped with a ring brush located along the perimeter of each hole of the disk, the pile length of which is 1.3-1.5 times the size of the gap between sleeve surface and the edge of the disc hole.