DE3638648A1 - BLOWING UNIT FOR CLEANING CARTRIDGES IN FILTERS OF DRY DEDUSTERS - Google Patents

Description

The present invention relates to a blowing unit for cleaning cartridges in filters of dry congestion Bern.

A typical use of these filters is in silos that Contain materials such as cement, lime and the like.

The filters to which the invention is applied are from Type dry filter, provided with a number of filter cartridges from outside to inside of the air to be cleaned be flowed through.

This air is cleaned as it flows through the walls of the filter the dust particles floating in the air through the these walls are caught and settled on them. It is necessary to clean these cartridges regularly increase to them from the granules deposited on the walls free so that the best filter capacity is restored is posed.

Devices are already known for this purpose, the one Provide a blowing unit, regularly and in counterflow Sends compressed air into the interior of the cartridges mentioned, see above that a double effect is achieved: a shake of the Cartridge walls and at the same time the effect of the counter flow blown air. This double effect leads to Detach the granules from the walls of the cartridges.

The purpose of the present invention is that of effectiveness and  improve the operation of said devices by an equal amount of compressed air, especially in all cartridges is sent.

Another purpose of the present invention is that of a To deliver a blowing unit that is particularly effective and efficient economic production.

The stated and other purposes are achieved by the relevant blowing unit, which is characterized by that there is at least one internally hollow distributor body holds, in which a central chamber is described by which extend from tubular extensions, at their There are holes for the release of air, the mentioned holes corresponding to the open ends of the Cartridges of the filter are arranged, and which called te central chamber to the above and the compressed air ent holding container is connected.

Other features and advantages of the present invention are clearer from the detailed Be below writing an early, but not exclusive Form of realization that is purely by way of example and not limiting is illustrated in the accompanying drawings by to them

• - Fig. 1 in schematic form and in section a filter of a dry dedusting device, on which a blowing unit is located the invention is appropriate;  
• - Fig. Shows the blowing unit shown in Figure 1 in enlarged form and in section along the line II-II of Figure 3;
• - Fig. 3 shows the blowing unit from Figure 2 in section along the line III-III from Figure 2.

With reference to the above-mentioned figures, ( 1 ) denotes the filter of a dry dust extractor, which contains a number of filter cartridges ( 2 ) which are arranged vertically and are held by a horizontal partition wall ( 3 ) which cover the lower and dirty area of separates the upper cleaned area.

Above the partition ( 3 ) there is a suction chamber ( 4 ) in which the suction is obtained, for example with the aid of an electric fan ( 5 ), through which the clean air flows after it has passed through the cartridges ( 2 ).

Below the partition ( 3 ) there is a lower chamber ( 6 ) which contains the cartridges ( 2 ).

The polluted and dust-removing air enters the filter through a lower opening provided in the lower chamber ( 6 ) and flows through the walls of the cartridges ( 2 ) to reach the upper chamber ( 4 ). As it flows through the cartridges ( 2 ), the air cleans itself and deposits the dust particles on the surfaces of the cartridges themselves.

In order to be able to carry out regular cleaning of the cartridges ( 2 ), a blow unit ( 7 ) according to the invention is provided.

The blowing unit ( 7 ) contains a container ( 8 ) which is kept filled with compressed air until it reaches a certain pressure.

The unit ( 7 ) also contains a multiple body ( 10 ), which in turn contains two interconnected distributor bodies ( 11 ') and ( 11 ''). Each distributor body ( 11 ') and ( 11 '') is hollow on the inside and describes a central chamber ( 13 ), from which various tubular extensions ( 14 ) extend in the radial direction.

At the end of each tubular extension ( 14 ) there is a bore ( 15 ) for discharging the air. Each bore ( 15 ) is arranged above the upper open end of a corresponding cartridge ( 2 ) and its axis runs parallel to the axis of the cartridge ( 2 ).

The multiple body ( 10 ) is obtained by a casting process and provides a central, flattened section into which the two central chambers ( 13 ) are incorporated. These chambers ( 13 ) are separated from one another by an intermediate wall ( 16 ).

In the realization example shown in the figures, four tubular extensions ( 14 ) extend from the right-hand chamber ( 13 ), while three tubular extensions ( 14 ) extend from the left-hand chamber ( 13 ).

The aforementioned seven tubular extensions ( 14 ) are arranged horizontally and radially in relation to the center of the multiple body ( 10 ). One of the two central chambers ( 13 ) also provides a bore ( 17 ) through which the air is sent directly into a cartridge ( 2 ) which is in a central position.

Each of the two central chambers ( 13 ) has an upper and upwardly projecting nozzle ( 18 ) through which the chamber is connected to a nozzle ( 20 ) of a collector ( 21 ) with the aid of a short connecting pipe ( 19 ).

Said collector ( 21 ) provides an inlet extension ( 22 ) through which the collector itself is connected to the container ( 8 ).

The nozzle ( 20 ) are described by as many tubular elements ( 23 ), the height of which corresponds to the diameter of the collector ( 21 ).

The collector ( 21 ) provides an upper opening ( 24 ) which is arranged adjacent to each tubular element ( 23 ).

An electrovalve ( 25 ) is arranged above each tubular element ( 23 ), the lower part ( 26 ) of which describes a chamber which extends over the upper end of the tubular element ( 23 ) as well as over the upper opening ( 24 ).

The passage of the air between the central chamber of the col lector ( 21 ) and the nozzle ( 20 ) thus takes place through the opening ( 24 ), from here through the chamber described by the lower part ( 26 ) and finally through the tubular element ( 23 ).

Each solenoid valve ( 25 ) (which is normally calmed) provides a diaphragm seal ( 27 ) which normally closes the upper end of the tubular element ( 23 ) and thus each passage from the chamber of the collector ( 21 ) to the nozzle ( 20 ).

Said collector ( 21 ) with the corresponding connection piece ( 20 ), the extensions ( 22 ) and the tubular elements ( 23 ) can be made from a single casting.

The operation of the blowing unit runs on the be below transcribed way.

The container ( 8 ) is kept filled with standing pressurized compressed air.

After a certain period of use of the filter ( 1 ) - generally by an automatic command - the blowing unit ( 7 ) is triggered by energizing the solenoid valves ( 25 ). These raise the membranes ( 27 ) and open the connection between the extension ( 22 ) (which is directly connected to the container ( 8 )) and the connector ( 20 ). The pressurized air therefore flows through the collector ( 21 ) from the loading container ( 8 ) to the two distribution bodies ( 11 ') and ( 11 '') and is by these through the holes ( 15 ) and the bore ( 17th ) sent into the cartridges ( 2 ) and effect the desired dedusting of the cartridges themselves. This takes place on the one hand by shaking the surfaces of the cartridges ( 2 ) and also by the action of the air blown in countercurrent, which causes the dust particles to detach from the surfaces of the cartridges.

Claims (6)

1. Blower unit for cleaning cartridges in filters of dry dedusters of the type containing a number of cartridges, which are flowed through from the outside inwards by the air to be cleaned, containing a container ( 8 ), which at regular intervals into the cartridges mentioned sending and under a certain pressure air is kept filled, characterized in that it contains at least one internally hollow distributor body ( 11 ', 11 '') ent, in which a central chamber ( 13 ) is described, from which tubular Extend extensions ( 14 ), at the ends of which there are holes ( 15 ) for discharging the air, said holes being arranged corresponding to the open ends of the cartridges ( 2 ) of the filter, and wherein said central chamber ( 13 ) is connected to said loading container ( 8 ). 2. Unit according to claim 1, characterized in that said distributor body ( 11 ', 11 '') and the genann th extensions ( 14 ) are obtained by a casting process from a single body. 3. Unit according to claim 1, characterized in that it holds at least white distributor body ( 11 ') and ( 11 '') ent, said distributor body ( 11 ') and ( 11 '') united in a single multiple body ( 10 ) are obtained by a casting process. 4. Unit according to claim 3, characterized in that said multiple body ( 10 ) provides a middle section of flattened shape, in which said central chambers ( 13 ) are incorporated, from which radially said extensions ( 14 ) extend. 5. Unit according to claim 1, characterized in that it contains a collector ( 21 ) which serves to connect the loading container ( 8 ) with the central chambers ( 13 ), and the same number of tubular elements ( 23 ) before, which are normally closed by valves ( 25 ), said collector ( 21 ) together with its various components being made from a single casting. 6. Blow unit for cleaning cartridges in filters from Dust dedusting as described and shown are.