SU1606159A2 - Bag filter - Google Patents

Abstract

The invention relates to filtering devices for gases or vapors, in particular to bag filters for the recovery of powder paints. Its use will reduce the loss of powdered material and fire and explosion hazard. The bag filter is provided with additional bunkers with ejectors attached to the bottom wall of the dust separator, made perforated and undulating, and the filter is equipped with perforated peaks installed in additional bunkers. 1 hp f-ly, 2 ill.

Description

The invention relates to filtering devices for gases or vapors, in particular to bag filters for the recovery of powder paints.

The purpose of the invention is to reduce the loss of powdered material and fire and explosion hazards.

FIG. I depicts a bag filter incision; in fig. 2 — node I in FIG. one.

The filter includes a housing 1 with an outlet nozzle 2 connected to a fan. In case 1, filter elements are mounted: rigid-frame fabric sleeves 3. A hopper 4 is placed under the case 1, in the bottom opening of which the flap 5 is installed with the possibility of rotation. The axis of the latter is connected with a pneumatic actuator (not shown). A storage tank 6 with a porous partition 7 is attached to the bunker 4. The space under the porous partition 7 is connected to a source of compressed air, and above the partition to the ejector 8. There is an opening in the side wall of the bunker equipped with an additional damper 9. On the outer side it is attached to the bunker dust separator 10, which is connected with a hole equipped with a valve 9, with a hopper, inlet channel 11 — with a powder filling chamber and discharge port — with storage tank 6.

In the discharge opening of the plate dust separator, flap 12 is installed, connected by links 13-15 with flap 9 and links 16 and 17 with flap 5. Flap 9 and link 15, flap 12 and link 13, flap 5 and link 17 are rigidly connected. Link 15 and 14, link 14 and 13, flap 12 and link 16, link 16 and 17 are connected hingedly. The length of the links 16 and 17 and the magnitude of the angle of rotation of the shutter 12 are selected from the condition: with the vertical position of the shutter 5, the discharge opening of the lamellar dust collector is completely closed. The length of the links 13-15 and the angle of rotation of the shutter 9 are selected from the condition: with the vertical position of the shutter 5, the hole in the side wall of the hopper remains ajar.

In the upper part of the housing 1 are placed air nozzles 18, each of which is located above the corresponding fabric sleeve. Air nozzles 18 vol (L

05

About C5

SP

WITH

N)

The sections in the section and section are connected to the receiver through pneumatic electromechanical valves of quick air discharge, controlled by an electrical impulse programmer, which is also connected to the pneumatic actuator of the valve 5. In the rotary-mounted plates 19, holes are made.

FIG. Figure 1 also shows the bottom hole 20 of the bunker, the hole 21 on the side of the barrel abruptly changes its direction. As a result, in the inter-lumen space an overflow can occur with gas inhibited flow, which swells the separated powder paint, and the aerosol suspension 5 of increased concentration enters the filter hopper, thereby sharply reducing the dust separation efficiency. To eliminate this phenomenon, the louvered plates 19 are perforated. Through the back wall of the bunker, the discharge opening 22 Q versti 23 in the louver plates of the dust separator and the holes of the 23 plates. The bottom wall 24 of the lamellar dust separator 10 is made wavy and perforated, and additional bunkers 25 are placed under it, equipped with an ejection, the discharge of excess air during the period of blocking the discharge opening of the dust separator.

Over time, the louvre plates 19 may overgrow the powder

tori 26. In the bunkers 25 under the lower wall-15 paint, as a result of which the effect of the 24-lamellar dust separator 10 is reduced, the perforated visors 27 fixed from plexiglas are fixed.

The filter works as follows.

dust separation. For periodic cleaning of the louver dust separator plates 19, during continuous filter operation, the plate assembly is rotatable around

During periods of filter operation (before the beginning of the general axis, going out of the filter.

pulse blowing and between the moments of pulsing blowing) the flaps in the bunker part of the filter are installed as follows: the flap 9 in the wall of the bunker, through which the dust separator and the bunker are connected, is open; the damper 12 of the discharge opening 22 of the dust separator 10 is open; the valve 5 of the bottom opening 20 of the hopper is closed.

Air suspension in the input channel enters the dust separator 10. As a result

on which the flywheel is fixed for manual rotation of this block. As a result of the reciprocating motion of the flywheel, the aerodynamics of interaction of the aerospace flow with the working surface of the louver plates is adjusted, i.e., the angle of contact of the surface of the aeroplanes with the aerosol suspension changes.

As the sleeves 3 become dusty with powder paint, they are automatically pulsed by blowing. From block

air suspension flow interaction with the formation and control of a pulsed blowing system

bag filters an electric signal is applied to the pneumatic electric valve, which opens the membrane valve of a quick reset (not shown) of the compressed air volume of the receiver into the distribution pipe with nozzles 35 mounted opposite the sleeves along their axes. At the same time, the compressed air enters the pneumoelectrocontact device, which delivers a significant portion of the powder paint containing 19 in the past volume of the aerosol suspension, is separated from the flow and flows from the plates 19 through the discharge port 22 of the dust separator into the storage tank. 6

A portion of the powder passes through the openings of the plates 19 and the bottom wall 24 and enters additional bunkers 25, from which is removed by means of ejectors 26.

The wave-like surface of the wall 24 is a 40-pulse to trigger a pneumatic circuit to help reduce the speed of the powder flowing through it and remove it from the filter through additional bunkers 25.

Owing to the visors 27, soft powder paint is deposited in additional bins 25 (the stickiness and clumping of the particle brush are reduced). At the same time, the visors 27 serve as membranes protecting the mass of powder in bunkers from the suction effect of the air flow passing through the dust separator.

electric valves for controlling the operation of the pneumatic cylinder (not shown) and the valve 5 of the bottom opening of the bunker, which are kinematically connected to the valves 9 and 12 through hinged-lever mechanisms. 45 As a result of the operation of the pneumatic cylinder, the valves occupy the following positions; the flap 9 covers the hole, leaving a reduced opening for the air suspension; the damper 12 of the discharge opening of the dust separator closes the opening;

50

flap 5 in the bottom hole of the hopper opens the hole. Powder paint, assembly under the action of compressed air with filtering sleeve 3, falls into the hopper 4 and then flows along its walls and through the slightly opened valve 9 into the storage tank 6. Powder paint separated from aerosol when interacting with dust separator plates 19, this period of operation of the filter accumulates under

Air suspension with a significantly lower content of powder paint bends around the plate and through the holes of the plates 23 of the dust separator 10 enters the filter hopper 4, and then into the filter sleeves 3.

During regeneration of the sleeves, the discharge opening 22 of the dust separator is closed. The air suspension flow following an inertia dust separator abruptly changes its direction. As a result, in the inter-lumen space an overflow can occur with gas inhibited flow, which swells the separated powder paint, and the aerosol suspension 5 of increased concentration enters the filter hopper, thereby sharply reducing the dust separation efficiency. To eliminate this phenomenon, the louvered plates 19 are perforated. Through the versts 23 in the louver plates of the inspect 23 in the louver plates, excess air is discharged during the period of blocking the discharge opening of the louver dust separator.

Over time, the louvre plates 19 may overgrow the powder

paint, resulting in reduced effector paint, resulting in reduced dust removal efficiency. For periodic cleaning of the louver dust separator plates 19, during continuous filter operation, the plate assembly is rotatable around

common axis extending out of the filter.

yo common axis outgoing filter.

on which the flywheel is fixed for manual rotation of this block. As a result of the reciprocating motion of the flywheel, the aerodynamics of interaction of the aerospace flow with the working surface of the louver plates is adjusted, i.e., the angle of contact of the surface of the aeroplanes with the aerosol suspension changes.

As the sleeves 3 become dusty with powder paint, they are automatically pulsed by blowing. From block

30 Pulse Purge System Control

 40 impulse to operate the pneumatic circuit

electric valves for controlling the operation of the pneumatic cylinder (not shown) and the valve 5 of the bottom opening of the bunker, which are kinematically connected to the valves 9 and 12 through hinged-lever mechanisms. 45 As a result of the operation of the pneumatic cylinder, the valves occupy the following positions; the flap 9 covers the hole, leaving a reduced opening for the air suspension; the damper 12 of the discharge opening of the dust separator closes the opening;

50

55

flap 5 in the bottom hole of the hopper opens the hole. Powder paint, assembly under the action of compressed air with filtering sleeve 3, falls into the hopper 4 and then flows along its walls and through the slightly opened valve 9 into the storage tank 6. Powder paint separated from aerosol when interacting with dust separator plates 19, this period of operation of the filter accumulates under

the plates 19 of the dust separator on the flap 12 of its discharge opening. The accumulated powder paint after opening the aperture of the shutter 12 after the end of the pulsed blowdown is dumped into the storage tank 6.

The air suspension with a significantly lower concentration of powder paint through the holes of the dust separator plates 10 and through the aperture of the hopper enters the hopper 4, then to the filter sleeves 3. At the end of the pulsed blowing of the entire filter section or one of its parts, the damper immediately returns to its original position, corresponding to the mode of accumulation of powder paint on the sleeves.

The storage tank 6 of the powder paint is closed from above by the flap 5 installed in the bottom opening 20 of the hopper 4, which excludes pickup of the regenerated powder paint and its secondary regeneration. The pickup of the powder paint from the storage tank 6 through the discharge opening 22 of the dust separator 10, and then through the openings 23 of the plates 19 of the dust separator 10 and the opening of the hopper is eliminated due to the creation of high resistance to aerospace in this channel.

The use of the proposed bag filter allows to reduce the loss of powder paint, preventing its clumping and reusing the powder sent from the additional bins 25 directly to the nozzles.

A smaller amount of powder gets into the storage tank, which reduces the fire and explosion hazard of the filter. In addition, you can reduce the number of stops of the filter and the cost of cleaning its dust separator.

Claims (2)

1.Handle filter according to ed. St. No. 1426622, characterized in that, in order to reduce the loss of powdered material and fire and explosion hazard, the filter is provided with additional bunkers with ejectors attached to the bottom wall of the dust separator, perforated. 2. The filter according to claim 1, characterized in that it is provided with perforated 25 visors installed in additional bins mounted under the bottom wall of the dust separator, made wavy   L 6 7 f П 22 26 1S 1 14 26 Fi2.2