JP2002361017A - Dry type filter capable of automatically discharging and having higher separation efficiency - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dry filter having a structural dimension convenient for a narrow condition, particularly the mining and high separation grade. SOLUTION: A filter housing (2) having the structural dimension convenient for the dry type filter (1) is composed of side walls (6, 30), a rear wall (11) and a housing bottom part (9) and a connection branched part (7) for a cleaned gas passage (4) is installed on one of the side walls (6, 30). A feed gas passage (3) is opened in a zone of a cap (32) and the mine air containing dust or the feed gas flows-in from the upper side into the filter housing (2) through the feed gas passage (3) to be passed through partition walls (28, 29) or a filter element (5). The separated dust falls down into a chain scraper conveyer (20) through a vibration apparatus or the like and is transported through a discharge gate (21) by the chain scraper conveyer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry filter for separating dust and similar suspended solids from underground air containing industrial exhaust gas and dust during underground mining and tunnel construction, comprising a raw gas passage. And a filter housing having a purifying gas passage, a filter element, and a discharge member for discharging separated dust.

[0002]

However, for economic reasons in accordance with the provisions of the law, dust and other suspended substances entrained by various exhaust gases from underground mining or just by downhole air are filtered from the carrier gas, As a result, a purge gas or breathable air is present after the respective filter element and correspondingly eliminates environmental concerns. Filter elements of various constructions, and also the most different filter elements together, are known and used, and usually downhole air containing raw gas or dust is passed through the filter element by a ventilator arranged behind the filter element. Inhaled, dust is then removed. The advantage of this arrangement is that a long service life is achieved, since the respective ventilator remains unaffected by dust particles in its ventilation fan. The disadvantage, however, is that a large filter housing is used and required for known dry filters. This is because the raw gas passage opens into the filter housing and the purge gas passage is led therefrom, and the various filter elements form the internal structure of the filter housing. As a rule, the raw gas is led laterally into the filter housing and is discharged on the lid side via a purge gas passage. Indeed, in underground mining and other confined areas, such expensive and volumetrically disadvantaged filter housings cannot be used or can only be used with serious problems. A further disadvantage is that it is particularly difficult to effectively sediment very fine particulate dust, since the dusty air usually has to be guided against the falling dust.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is therefore to provide a dry filter having a structural size and a high degree of separation which are favorable for narrow situations, especially in mining.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a filter element is formed and arranged such that a filter element subdivides a filter housing into triangular sections and is insertable from a purge gas side. The problem is solved in that the passage is lateral and the raw gas passage is connected to the filter housing on the upper edge side, preferably on the lid side, and a chain scraper conveyor with a discharge gate is provided as a discharge member.

[0005] With this special design of the dry filter, the purified gas passage and the raw gas passage are substantially already integrated in the housing, whereby the respective partition plane can advantageously be made larger, and At the same time, it must be used here advantageously so that the necessary separating or filter elements can be fitted. The raw gas and purified gas are also knocked off intermittently or continuously in the original filter housing, even the separated dust, so that they are collected on the bottom and discharged through the chain scraper conveyor and the discharge gate. Be guided. At that time, the dust moves in the same direction as the dust-containing gas, but this has the advantage that fine dust can be barely settled without the dust rising. On the contrary, the dust itself and the gas containing the dust move in the same direction, so that an advantageous discharge of the dust is possible. The purge gas flows beyond the filter element into two-part purge gas passages, which are then later added to the connection branch in the region of the connection branch.
Merging into two purifying gas passages. At the same time, the raw gas having a particularly high dust content can be purified optimally, quickly and in a small amount of space. A further advantage is that by integrating the clean gas passage and the raw gas passage into the original filter housing, the possibility exists that the discharge member can be directly attached to the bottom without the need for a separate device. That is. In this way, a occupying separation is achieved, since the purge gas is conducted through the filter housing and the filter element mounted thereon.

[0006] According to a preferred embodiment, the purge gas passage is connected to the side wall or back wall of the filter housing via a connection branch. This has the advantage that the expensive "structure" of the filter housing can be abandoned. This is because the purge gas passage or the component of the purge gas passage protruding from the filter housing is connected directly to the connection gate. At the same time, assembly on the filter housing or filter housings which have to be made high are avoided. Extension or lateral extension, or keeps the structural dimensions in an area that will not cause any infringement even underground mining or allow for convenient containment into existing tunnel cross-sections be able to. Furthermore, as explained earlier, since the filter housing is subdivided into triangular sections by the clean gas passage and the raw gas passage, customary components such as, in particular, the ventilator are also hermetically mounted in the original housing and already more It can be arranged in such a way as to obtain the advantageous overall configuration described above.

[0007] Earlier, as already mentioned, the special arrangement of the filter element in the filter housing at its triangular division allows the raw or dust containing gas to leave the dust in the filter element. At the same time, it is possible to flow into both split channels or split sections, which split channels are then arranged according to the invention so that they meet at the direct connection branch. Thereby, the invention proposes that the connection branch is arranged on the side wall or the back wall, on which the filter element is oriented to form a point. The purifying gas therefore automatically flows in the right direction and to the connection branch after its purging.

Another advantageous configuration is one in which the raw gas passage and the purified gas passage are designed to create one planar filter in the filter housing. At the same time, it is conceivable to form the partition surface as a planar filter between the raw gas passage and the purified gas passage, but here a sintered filter element, a compact filter element or a pocket filter element can be used. This is made possible by the split raw gas guide and the purified gas guide, whereby a high separation effect can be achieved.

However, even in underground mining and other restricted areas, it is difficult to replace the filter element from the lid with the dry filters used so far. The filter element already has its positioning
Requires a relatively large free plane to allow removal of the filter element. In contrast, in the present invention, the filter elements are arranged such that the individual filter elements can be replaced laterally or from the side. For this purpose, the invention proposes that the side walls assigned to the purge gas channel be formed in the form of a cassette, in which case each cassette can be loosened from the side walls individually and / or together with other cassettes. The filter element can then be removed over the side wall and replaced if this needs to be replaced for any reason.
It is furthermore advantageous that this change is carried out on the purge gas side, so that the change is also significantly ergonomic for the operator.

As referred to earlier, sintered, compact or pocket filter elements can also be used, in which case the invention provides that the filter element be implemented or implemented as a filter tube forming a filter wall. To be able to. The filter tube is
Assembled to form a consistent filter wall that can reliably achieve dust separation. These filter tubes can also be replaced laterally, so that the above-mentioned advantages are provided therewith.

In the case of a filter element in the form of a filter tube, it is advantageous if the filter element in the form of a tube or of a plane has a pleated wall. The pleats allow for a substantially larger area of free use, and the pleats at the same time have a high separability and a high degree of separability, since dust can accumulate on both attached dividing walls for the reason of the pleats. In addition, there is an advantage that a higher separation grade can be obtained.

The "load" or action of the corresponding filter element is only possible when it is uniformly loaded.
That is, there should be no gap. For this purpose, the invention proposes to seal the filter elements against the wall of the filter housing and to each other. Here, it is possible to draw on the prior art, but then it is not possible to adapt the individual filter elements to the actual situation already because of handling techniques. Therefore, the edge areas of the filter elements should in each case be sealed off to one another and in particular to the filter housing, so that dusty downhole air or raw gas can only pass through the original filter elements.

The filters used may be of any construction, but must be cleaned at regular intervals to obtain a reasonable lifetime. The agitated dust is conveyed from the housing by the discharge device described or described above. In order to ensure that the dust adhering to the filter element is removed therefrom, the invention proposes to attach the filter element to a vibration or impact device. That is, the filter element itself is swollen in the direction of the raw gas passage by vibrating a part of the housing or of the filter element and then being swung by a suitable machine or acted upon for a short time at a pressure above atmospheric pressure. It can repel dust that has adhered.

Dust that has been stripped from the filter element by vibrating or impacting devices falls onto the chain scraper conveyor, in which case according to the invention the chain scraper conveyor consists of one or more chain bands. The chain band has an entraining member arranged at right angles to the conveying direction. Via a chain band with entraining members, the dust is conveyed continuously or discontinuously towards the discharge gate, from where it is fed for further use or waste treatment.

Even in a relatively large housing, when a chain band having an entraining member is arranged so as to extend inside a housing bottom formed like a tank, and a discharge gate is attached to an end side of the housing bottom, It can be operated with a chain band as described above. In that case, the sloped part of the wall that forms the bottom together is slightly defined. This is because the overall height of the filter housing must not be increased accordingly. However, it is customary to place the lower part of the side wall at an angle so that the dust can slide along it, thereby achieving that the dust is then transported together by the chain band entrainer in the direction of the discharge gate. Is done.

A corresponding filter can also be used advantageously for large volume flow areas. This is because, according to a further development of the present invention, a frequency converter is provided in the raw gas passage and the purified gas passage for regulating the volume flow. At the same time, the corresponding selection of the structure determines the basic design of the filter installation that can be used depending on the volume.

The present invention is particularly distinguished by the new creation of dry filters having significantly advantageous structural dimensions and from which, inter alia, high separation grades which can also be used with advantage for use in underground mining. . The filter element is arranged and equipped to optimally hold the guided downhole air or raw gas dust and then release it at exactly the given point in time and be affected via vibration and impact devices Thereby, dust can be disposed of through the entrainment member and the chain band.
Advantageously, the individual filter elements can be exchanged from the side and from the purge gas side, for which a cassette-like door is arranged in the side wall. Finally, it is advantageous that the raw gas flows from above, ie from the lid, into the raw gas passage and is guided downwards, and therefore recognizes the same direction as the dust falling from the filter element. The gas then flows through the filter element into the purge gas passage and, via a special shaping of the purge gas passage, to a connection branch for the purge gas passage arranged on the rear or side, for the purpose of the target. Guided and then later discharged into the atmosphere.

Further individual objects and advantages of the subject matter of the invention will become apparent from the following description of the accompanying drawings, in which preferred embodiments are shown, in which the individual objects and components required are shown.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments shown in the drawings.

FIG. 1 shows a dry filter 1 having a raw gas passage 3 and a purified gas passage 4 in which a filter housing 2 is integrated. The separate raw gas guide and purified gas guide allow the partition surface to be advantageously covered by the filter element 5, so that a convenient separation of dust or other suspended matter is achieved.

FIG. 1 shows various doors 1 on the side of the housing.
2, 13, 14 are provided, which make it possible to access the various filter elements 5 if necessary. A side wall 6 supports a connection branch 7 for connection of the purified gas passage 4, in which or at which a ventilation 8 is provided. In the region of the bottom 9 of the filter housing 2
0 is arranged. Instead of attaching the connection branch 7 to the side wall 6, it is also possible that this connection branch 7 can be attached to the back wall 11, which is not visible here. Eventually, the connection for the connection branch 7 and, together therewith, the cleaning gas channel 4 is made laterally, so that the structural height of the filter housing 2 is the same as the structural height of the entire device or of the dry filter 1. There is also the advantage that there is. This is just as important and particularly advantageous in underground mining.

FIGS. 2 and 3 show two chain scraper conveyors 20, 22 in the region of the bottom 9 with the discharge gate 2.
3, there is shown an arrangement in which it is recognized that only one corresponding chain scraper conveyor 20 is provided with the discharge gate 21 in FIG. Here, the side walls or walls of the filter housing 2 are cut obliquely in a funnel-shaped manner, so that only one such chain scraper conveyor 20 can make up.

Finally, FIG. 4 shows a plan view of the filter housing 2, but it can be seen that the split raw gas guide and the purified gas guide enable a large planar filter 18, in which case these filters can be used. The plane is large. This is because in the filter housing 2, the divided parts 15, 1
6 and 17 allow a corresponding subdivision and thus a distribution of various planar filter designs. 7
, The connection branch already described is shown, and at 6 the side wall on which the connection branch 7 is mounted.

FIG. 5 shows an enlarged view of the dry filter 1 as viewed from the side, in which the filter housing 2 shows the side wall 6, in particular the cassettes 12, 13, 14 as doors, so that the rear side is shown. The invisible filter element 5 can be easily removed from the purified gas side and replaced.

FIG. 5 shows very clearly that the raw gas passage is led from the upper edge 26 into the filter housing 2. On the purified gas side 25, a connection branch 7 for the purified gas passage 4 can be seen and a connection branch for the raw gas passage 3 is indicated at 35. 36
Shows the usual hanging hooks and, if necessary,
The entire filter housing 2 can be fixed via these hanging hooks and then transported from one location to the other.

In the area of the housing bottom 9, the discharge member 1
0 is reproduced here in the form of a chain scraper conveyor 20 having a discharge gate 21. The discharge gate 21 has a reversing part for the chain band 33 and the entraining member 34, and the separated dust is brought into the atmosphere so that the separated dust remains harmless and can be carried further in particular. Release results.

Returning to FIG. 4, it should be noted once more that the interior of the filter housing 2 has a flat filter 18 or a partition wall 2 in the form of a flat filter 18.
Division 1 already described internal space via 8, 29
5, 16, and 17. With it,
In other words, two purging gas sides 25 occur or the side walls 6
There are two parts of the purified gas passage 4 that open to the connection branch 7 attached to the second. The side wall 30 and the side wall 6a have the previously described cassettes 12, 13, 14 which allow access to the filter element 5 through the purge gas passage 4 or the split passage. These filter elements 5, or more precisely, the partition walls 28, 29 which form them, extend together to a point 27, which is precisely directed to the connection branch 7.

Partition walls 28 and 29 or flat filter 1
8 are sealed against one another against the wall 31 of the filter housing 2 so that the mine air containing the raw gas or dust flowing through the raw gas passage 3 or the divided section 16 is forced from the lid 32 to the housing bottom 9. Direction, thereby discharging dust from here and the planar filter 18
While passing through the raw gas passage 4 or the divided passage.

It will be understood that all the foregoing features, including those which can be inferred only from the drawings, alone and in combination, are essential to the present invention.

[Brief description of the drawings]

FIG. 1 is a side view of a dry filter provided with a purification gas passage.

FIG. 2 is a frontal front view of a dry filter having two chain scraper conveyors.

FIG. 3 shows a frontal front view with a chain scraper conveyor, respectively, in cross section.

FIG. 4 is a plan view of a filter housing having a divided raw gas guide and a purified gas guide.

FIG. 5 is an enlarged reproduction view of a dry filter having a connection branch for a purified gas passage and a raw gas passage.

[Explanation of symbols]

 Reference Signs List 2 Filter housing 3 Raw gas passage 4 Purified gas passage 5 Filter element 6, 11 Side wall or back wall 7 Connection branch 9 Housing bottom 10 Discharge member 12, 13, 14 Cassette 15, 16, 17 Triangular division 18 Flat filter 20 Chain scraper conveyor 25 Purified gas side 27 Pointed end 28,29 Partition wall 31 Wall 33 Chain band 34 Carrying member

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Reinhold Boat Germany, Gelsenkirchen, Am Feldbusch, 65 ) Inventor Christian Haubolt, Federal Republic of Germany, Gladbeck, Lange Strasse, 99F term (reference) 4D058 JA10 JA12 JA14 JB22 KA01 KA25 KB01 KB12 KB15 MA02 MA06 RA12 SA20 UA25

Claims (12)

[Claims] A dry filter for separating dust and similar suspended matter from underground air containing industrial exhaust gas and dust in underground mining and tunnel construction, comprising: a raw gas passage (3); In a dry filter comprising a filter housing (2) having a passage (4), a filter element (5), and a discharge member (10) for discharging separated dust,
The filter element (5) subdivides the filter housing (2) into triangular sections (15, 16, 17) and
5) formed and arranged to be insertable from the purifying gas passage
(4) is connected to the filter housing (2) on the side and the raw gas passage (3) on the upper edge side, preferably on the lid side, and the chain scraper conveyor (20) is used as a discharge member (10). 21. A dry-type filter provided with: 21). 2. The method according to claim 1, wherein the purifying gas passage is connected to a side wall or a back wall of the filter housing via a connection branch. The dry filter as described. 3. The connecting branch (7) is connected to a side wall (6) or a back wall (1).
1) arranged in the filter element (5) to said side wall or back wall
Dry filter according to claim 1 or 2, characterized in that they are oriented so as to form a point (27). 4. The filter element (5) is embodied as a planar filter (18) forming a partition wall (28, 29) between the purified gas passage and the raw gas passage (4, 3). The dry filter according to any one of claims 1 to 3, wherein 5. A side wall (6, 3) attached to a purified gas passage (4).
0) are formed in the form of cassettes, each cassette (12, 13, 14) being detachable individually and / or together with the other cassette (12, 13, 14) from the side wall (4). Dry filter according to any one of 1 to 4. 6. The dry filter according to claim 1, wherein the filter element is embodied as a filter tube forming a filter wall. 7. Dry filter according to claim 6, characterized in that the filter element (5) has a tube-shaped or planar-shaped pleated wall. 8. The filter element (5) is a filter housing.
The dry filter according to any one of claims 1 to 7, characterized in that the filter (2) is sealed to the wall (31) and to each other. 9. The filter element (5) is provided with a vibration device or an impact device.
The dry filter according to any one of the above. 10. The chain scraper conveyor (20) has one
10. Chain chain (33), comprising a driving member (34) arranged at right angles to the conveying direction. Dry filter according to one. 11. A chain band (33) is arranged along with the entraining member (34) so as to extend inside a housing bottom (9) formed in a tank shape, and a discharge gate (21) is provided on the housing bottom at an end. The dry filter according to any one of claims 1 to 10, further comprising: 12. The gas converter according to claim 1, wherein a frequency converter is provided in the raw gas passage and the purified gas passage for adjusting a volume flow. Dry filter according to any one of the above.