SU850163A1 - Bag filter - Google Patents

Description

(54) SLEEVE FILTER

one

The invention relates to bag filters and can be used to clean gases in dust suction units in various sectors of the national economy.

A device for fastening and tensioning the fabric filter sleeves open at the top and bottom is known, comprising a clamping device in the form of a tapered yoke with a wedging lockless ring, a spacer ring with a profiled shoulder suspended on a spring-loaded link. The spring loaded ha is made flexible and fixed on the hatch cover located on the filter roof, and the sleeve is pinched on the inner conical yoke using a free outer elastic ring resting on the tapered part of the yoke 1.

However, this device is intended only for individual tensioning of the sleeves.

A bag filter is also known, comprising a housing, filtering sleeves with a tensioning device, nozzles for supplying and discharging gas, upper and lower grids for attaching the sleeves, and a mechanism for unloading trapped dust. Tension device

the sleeves are made in the form of a perforated shell freely installed between the outer surfaces of the lower end of the sleeve, turned inside out 2.

However, the sleeves are tensioned by the weight of the sleeves themselves and the dust deposited on them. As a result, the tension of the sleeves during the operation of the filter is not the same: little at the initial moment, when there is no settled dust on the sleeves, and as the dust accumulates it increases.

10 In this filter, it is impossible to adjust the tension of the sleeves, and the efficiency of the filter depends on the optimal tension force. For mixtures of different concentrations, we need our own optimal tension force of the sleeves,

 they must be constant during the operation of the filter. There is a gap between the conical ring for fastening the sleeve to the lower grille and the perforated casing for free movement of the perforated shell, therefore oscillations of the perforated shell with the sleeve, accompanied by friction and impacts, are inevitable. This causes increased wear of the sleeves, rings for fastening the sleeves and

perforated shell. On the other hand, friction and shock limit the field of application of the bag filter, for example, it is not applicable to mixtures sensitive to impact and friction.

The purpose of the invention is to stabilize the tension of the sleeves during operation and ensure its regulation.

This goal is achieved by the fact that in a bag filter having a body, filtering sleeves with a tensioning device, gas inlets and outlets, upper and lower grids for attaching the sleeves, a discharged dust discharge mechanism, the filter is provided with a pipeline form of hydraulic cylinders mounted on the upper grille, including pistons and rods, interacting with filtering sleeves, the bottoms of the hydraulic cylinders being made with holes that are connected by pipelines.

The drawing shows a bag filter, cut, general view.

The bag filter includes a housing 1, filter sleeves 2, a tension device 3, nozzles for supplying 4 and for exhausting gas 5, upper b and lower 7 grids for attaching the sleeves, a mechanism for cleaning the sleeves and unloading the collected dust (not shown) .. Tensioning the device 3 is hydraulic cylinders 8 mounted on the upper grid 6 coaxially with filtering sleeves 2. The pistons 9 hydraulic cylinders 8 are connected to the rods 10, which are connected to the spacers 11. The distance ends of the sleeves 2 are fixed. The lower ends thereof are not fixed odvizhno the lower cavity reschetke Rod 7. A hydraulic cylinder 8 are interconnected conduits 12. At one of the hydraulic cylinders 8, there is a fitting (not shown) for supplying a cavity schtokovye A fluid under pressure or its discharge. The pressure in cavity A is determined by a pressure gauge (not shown).

The filter works as follows.

A fan or a gas blower (not shown) in the space located below the lower grate 7 creates a vacuum, under the action of which the dusty gas enters inside the sleeves 2. By sucking through the walls of the sleeves 2, the gas is dedusted, the dust is retained on the inner surface of the sleeves, and the purified gas is dropped in atmosphere. When a certain thickness of accumulation accumulates on the sleeves, a cleaning mechanism is activated. For this, the pre-filter is turned off. A layer of dust destroyed by the cleaning mechanism

sleeves, showered in a dust collecting bin, and from it, as it accumulates, is removed by a mechanism for unloading trapped dust. The tension of the sleeves 2 is produced by the tensioning device 3. This provides a constant tension force in the process

filter operation. If it is necessary to change the tension of the sleeves 2 into the rod end A, the pump delivers pressurized fluid or discharges it. The pressure in cavity A is determined by a pressure gauge. At the same time, the same pressure is established in all rod stocks A, since they communicate with each other. Under the action of pressure, the pistons 9 with the rods 10 are mixed up or down, thereby tensioning or weakening the sleeves 2.

Performing the tension arm in this way makes it possible, as compared with the known one, to regulate the tension of the arm over the body depending on the working conditions.

The application of the proposed filter allows maintaining the constant tension of the sleeves during operation.

Claims (2)

Invention Formula A bag filter comprising a body, filter sleeves with a tension device, upper and lower grids, and nozzles for supplying and discharging gas, characterized in that, in order to regulate 5, the tension of the sleeves, its stabilization during the work, the filter is supplied with a pipeline, and the tension device is made in the form of hydraulic cylinders mounted on the top grid, including pistons and jj rods interacting with filtering sleeves, the bottoms of hydraulic cylinders being made with openings that are connected by a pipeline. Sources of information taken into account in the examination 45 1. USSR inventor's certificate No. 326966, cl. On 01 D 25/00, 1969. 2. USSR author's certificate number 515521, cl. On 01 D 46/42, 1974.