SU1719025A1 - Bag filter - Google Patents

Abstract

The invention relates to a technique for cleaning gases from dust, can be used in the mining, chemical and other industries of the industry and improves the efficiency of the regeneration of the hoses. Inside the sleeve, the impellers in the form of blades are fixed rigidly on the central rod at regular intervals. In the impellers, the speed increases and the gas flow is swirling, which blows away the dust that has settled on the walls of the sleeve. The remaining dust is removed from the walls of the sleeve by means of elastic brushes attached to the ends of the impeller blades during reciprocating movement of the central rod. 2 Il.

Description

The invention relates to dust cleaning equipment for cleaning gases from dust particles by a filtration method and can be used in the mining, chemical and other industries.

Bag filters are known in which the regeneration of the filter fabric is carried out by installing multi-blade swirls at the entrance to the sleeve with installation of multi-blade turntables inside the sleeve, tapered inserts, rotating vanes with flexible elements, rigid cylindrical brushes.

However, the indicated structures of the device for tissue regeneration in bag filters have significant drawbacks; for their installation, bag filters of conical shape are required. The presence of rotating bladed wheels inside the sleeves complicates the design and operation, the load on the filter fabric increases due to the presence of circulating flow.

The closest technical solution to the present invention is a bag filter for cleaning gases from dust particles by a filtration method, comprising a housing, pipes for supplying contaminated and discharging purified gas.

At the inlet of the gas flow to be cleaned, multi-blade swirlers and a regenerating element made in the form of a blade turntable are installed in the bag filters, with the axis of the turntable shifted relative to the axis of the sleeve, and the edges of the blades parallel to the generatrix of the sleeve. Filter

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provided with a flexible cable connected to the swirler and the spinner, mounted in the core of the swirler so that it can be rotated.

However, this filter is difficult to manufacture, install and operate. The likelihood of rotation of the pinwheel under the influence of a swirling flow is small, since it has a considerable inertial mass. When the turntable is working, the tissue regeneration efficiency will be insufficient due to the fact that during rotation. regenerating blades will shake dust from only one half of the inner surface of the sleeve.

. The purpose of the invention is to increase the efficiency of regeneration of bag filters.

This goal is achieved by the fact that the filter is provided with brushes that are fixed on the ends of the blades, while the blades are fixed at a predetermined distance from one another along the height of the rod, installed with the possibility of reciprocating movement

Fig.1 shows the general view of the filter; figure 2 - section aa in figure 1.

The bag filter consists of a housing 1 with nozzles 2 and 3 for supplying contaminated gas and discharging purified gas. Inside the housing 1 on the rod 4, an axis of the sleeve 5 has impellers consisting of fairings b, around the perimeter of which the twisted blades 7 with elastic brushes 8 are evenly spaced. angle to the axis of the sleeve 5. The distance between the impellers is determined by the formula

X / 4 V Nc

where # 0,97-0,98 - the rate factor; .

But - pressure (discharge) of gas before the filter, m;

d is the internal diameter of the sleeve, m

In the lower part of the sleeve 5, the rod 4 is installed in the guide sleeve 9, and the upper end of the rod 4 is attached to the rod 10 connected to the rod 11, which passes through the upper cover of the filter housing 1 through the gland 12. The stroke length of the rod 11 is equal to the distance between impellers.

Bag filter works as follows.

Dust gas enters the upper part of the filter housing 1 through pipe 2 and passes into the sleeves. When entering the first impeller, the dusty gas passes through

the tapering channels formed by the outer surface of the finer 6, the blades-7 with brushes 8 and the inner surface of the sleeve 5 and the static pressure of the gas flow i is converted into high-speed energy - the gas flow rate increases. The increased speed flow is twisted about the axis of the sleeve. Under the action of centrifugal forces

dust particles are thrown to the inner wall of the sleeve, blown off by this flow and fall down. As the swirling flow decays, the dust-laden gas passes through the next impeller, the cross section of which inter-blade channels decreases and the process repeats. The gas that has passed through the hand cloth is filtered and removed from the filter through the outlet pipe 3, Leaving s on the inner walls of the sleeves.

the dust is removed by the brushes 8 during the reciprocating movement of the rod 4, actuated by the rod 11. The action of the rod 11 occurs at certain intervals according to the program.

 The number of impellers and the distance between them depends on the length and diameter of the sleeve, as well as the pressure (discharge) in front of the filter. The result of joint mechanical and aerodynamic effects on the layer of dust deposited on the filter sleeves increases the degree of regeneration of the sleeves. This increase in the degree of regeneration of the sleeves becomes pronounced when lounging

fine dust particles.

The presence of a constant aerodynamic effect on the dust layer reduces its thickness, which has less resistance to the gas flow to be cleaned, as a result of which the hydraulic resistance of the filter is reduced. A decrease in hydraulic resistance results in a reduction in energy consumption,

The proposed filter compared to

The prototype is more efficient and reliable, easier to operate and can be used in cylindrical sleeves of any diameter and length.

Claims (1)

Invention Formula A bag filter comprising a housing, nozzles for supplying contaminated and venting cleaned gas and fixed inside the sleeves on the central shaft of the impeller in the form of blades, characterized in that, in order to increase the regeneration efficiency, the filter is provided with brushes fixed to the ends of the blades, while 517190256 the blades are fixed at a distance of one from, with the possibility of a reciprocating another along the height of the rod, established by th movement. ten g: AND e X / EGTU-t f 12 / / / V f-rv-l .2