DE1507763A1 - Air filter - Google Patents

Description

Atmospheric Control Limited in Castle House, Carr Wood Road, Bramhall, Cbesbire (England)

ro

Air filter

The priority of the British Provisional Application Ho. 49 532 of December 4, 1964 is claimed for this application.

The invention relates to an air filter that is used for cleaning is used by air, which is caused, for example, by dust, cotton parts, Fluff and similar debris has been soiled. This air will be brief in the following called polluted air.

The air filter according to the invention is particularly suitable for installation in air cleaning systems within textile processing facilities, however, it is not limited solely to such use.

The object of the invention is to create an air filter whose filter material is continuously renewed, wherein in particular the density of the filter layer can be changed with simple means.

909830/0397 ₂

Hr da «the contract relationship ojlt the feeMotdmiiwj of the Deatidien Patwitonwaltikammei. - QerMtMoiid Mr LeMuag »ad payment: lerli · -Chorlottwbwfl

ORIGINAL

According to the invention, this object is achieved in that a continuous stream of filter material, durob the the polluted air is passed through dosing devices, which once the polluted filter material discharge from the continuous stream and on the other hand supply fresh filter material, is controlled.

The dosage arrangements can be in accordance with the invention Way can be controlled so that more contaminated filter material is removed than fresh filter material is supplied is or vice versa, so that the continuous flow of filter material is either loosened or compressed will.

An embodiment of the invention is given on & and the Drawing explained in more detail.

In the drawing is

Fig. 1 is a simplified longitudinal section in the plane II-II according to FIG. 2 through an inventive Air filter and

Fig. 2 is a plan view of the filter.

The filter 5 according to the invention extends across a pipe 6 through which the polluted air is directed in the direction of the arrow P.

909830/0397. ₅ .

This i'ilter beetebt from "ei concentrically arranged cylinders 7 and 8 whose open ^{Δ ηαβη} 7a and 8a respectively from the lead of the Robres 6 protrude, and thus both cylinders 7 and 8 transverse and perpendicular to the -Längsachse Robres. 6

The outer cylinder 7 consists of an imperforate housing, the sieve extends over approximately two thirds of a full circumference, while the remaining third consists of a perforated wall 7A. The perforated wall 7A of the housing 7, which forms the air inlet of the filter according to the invention, consists of a number of transverse lamellas 9, which extend across the feed tube 6. These lamellas 9 are inclined so that their upper edges are further away from the inner cylinder 8 than their lower edges. The inclination of the slats is advantageously made adjustable, which can be achieved, for example, in that they are rotatably mounted in a not shown dab me η or that their ends are rotatably connected to each other so that the slats 9 can be adjusted in a known manner, such as this is known from the slats of a blind. The housing 7 is stationary.

The inner cylinder 8 is designed as a completely perforated cage or also made of wire mesh.

909830/0397 -4-

Br is rotatably arranged within the outer housing 7 and for this purpose is carried by the spider IO, which in turn is mounted on the shaft 11, which is driven by the motor 12 via a reverse gear 13 with endless ■ Belt is rotated in the direction of arrow A. On the jacket of the cage 8 sit at equal angular intervals the webs 14, which are preferably flexible and which contact the inner surface of the outer housing 7 · The Housing 7, d he cage 8 and the webs 14 close in this way put together a number of bags.

A domed air deflector or damper 15 is internal of the cage 8, namely it is opened at the point 15A to the inlet of the air filter, so that the flow P of the polluted air entering the filter is divided after hitting the air deflector 15 and is deflected on both sides in the direction of arrows B (Fig. 2), so that it is to the open end faces of the Housing 7 and the cage 8 flows, to which the pipes 16 are connected, which via the double inlet channel 17 to a centrifugal fan 18 or some other negative pressure generator that feeds the purified air releases to the atmosphere through its outlet in the direction of arrow C.

-5-9098 30/0397

I b U / / b J - 5 -

The feed hopper 19, which contains a filter material 20 in granular or fibrous form, is arranged above the filter. Suitable filter material within the filter according to the invention are, for example: coke grits, sawdust, coal granulate, cork crumbs, charcoal and mixtures of these substances. Inside the feed hopper outlet, the feed impeller 22 is arranged, which can be driven in a manner known per se in order to be able to control the amount of fresh filter material conducted in the time unit into the gap between the cage 8 and the perforated part 7A of the outer housing 7. A similarly designed impeller 23 is located at the lower end of the perforated part 7A of the outer housing 7 'and this serves to remove the filter material 20 from the gap and a pipeline ^{via an outlet gap 24 within the outer housing 7 - Ln} 25 to be conveyed, which either leads to an oven or some other destruction device or to a filter material recovery system, which in turn is connected to the feed hopper 19 so that a backflow of the filter material 20 takes place within a Kries process.

-6- 909830/0397

BATH ORIGINAL

Ί S U / / b J

During operation, the gap between the thrucbrocbenen Part 7A of the outer housing 7 and the opposite Part of the inner cage 8 filled with filter material 20, and the impellers 22 and 23 rotate at the same speed, while the cage 8 at a relatively low speed circulates · In this way a contiguous series of circulating pockets is always filled with filter material 20. If now the polluted air in the direction of arrow P through the downward current or curtain is passed from filter material 20, it is cleaned, and the cleaned air G flows through the ^ Pipes 16 and 17 (see Fig. 2) to the centrifugal fan 18 or another vacuum generator and arrives eventually into the atmosphere or is fed back into a cycle. The contaminated filter material 20 is discharged from the lower impeller 23, while at the same time a corresponding amount of fresh produce Filter material from the feed hopper 19 through the upper impeller 22 into the flow of the effective filter material is initiated. In this way the flow of filter material is uninterrupted by fresh filter material added.

If the upper impeller 22 is rotated faster than the lower impeller 23 or vice versa, the density becomes

909830/0397 -7-

BATH ORIGINAL

the thermosetting filter layer increases or decreases.

The air divider 15 can also be omitted if the impellers 22, 23 are embedded in sealed housings of known design.

The size and the anzabj. the perforations or the masses Openings within the cage 8 and the distance between them can be modified.

If desired, the inner cage 8 can also be fixed instead of turning ibn, although for mechanical reasons it is actually more convenient to revolve it allow.

-0-

909830/0397

Claims (1)

Claims (l ^ y air filter, characterized by a, continuous Stream of filter material (20) through which the contaminated Air is passed through, and through dosing devices (22,2J), which on the one hand remove the contaminated filter material from the continuous flow and on the other hand fresh filter material respectively. 2. Air filter according to claim 1, characterized by adjustable metering devices (22, 23), the so adjusted «ground that a larger amount of contaminated filter material is discharged than fresh filter material is supplied and vice versa, so as to either loosen or compress the flow of filter material. J5. Air filter according to claim 1 or 2, characterized by two concentric cylinders (7, 8) with perforated walls that are perpendicular to the longitudinal axis an inlet pipe (6) extending therethrough through which contaminated air enters the perforated walls (7A, 14), between which the flow of the filter material is passed. 909830/0397 4. Air filter according to claim 3, characterized in that the outer cylinder (7) is arranged and stationary only its wall lying in the area of the inlet pipe (6) is perforated. 5. Air filter according to claim 3, characterized in that that the inner cylinder (8) is rotatable and completely perforated. 6. Air filter according to claim 5> characterized in that that the inner cylinder (8) is designed as a cage. 7 · Air filter according to claim 3 »characterized in that that the inner cylinder (8) has a grater arranged on its outer circumferential surface at equal angular intervals Supports webs (14-) which touch the inner surface of the outer cylinder (7), so that pockets are formed that contain the filter material and carry it with them. 8. Air filter according to claim 7, characterized in that the webs (14) are flexible. 9. Air filter according to one of claims 3-8, characterized in that the metering devices (22, 23) consist of two impellers, one of which has the 909830/0397 -10- BAD ORlG ¹ NAL . - ίο - Filter material between the durobro-covered surfaces (7A, 14-) the cylinder (7, 8) and the other one guides the filter material from the gap between the perforated surfaces the cylinder discharges. 10. Dedusting system, characterized by an inlet tube (6) for the polluted air, an outlet tube (16) for the clean air, a vacuum generator (18) which is closed to the outlet pipe (16), and an air filter according to any one of claims 1-9j which is arranged between the inlet tube (6) and the outlet tube (16). Ropers. P / ennin? 909830/0397 • Μ " Blank page