JP3935170B2 - Evaluation test method for filter cloth for filtration type dust collector - Google Patents

Description

  The present invention relates to an evaluation test method for a filter cloth for a filter-type dust collector, and in particular, transports the filter cloth attached to the dust collector to a test place in a state where the properties of dust attached to the filter cloth do not change. The present invention relates to an evaluation test method for a filter cloth for a filter cloth type dust collector which is designed to evaluate the filter cloth.

  Conventionally, as an evaluation test method for a filter cloth for a filter-type dust collector, after extracting one or more filter cloths arbitrarily selected from a large number of filter cloths suspended in the filter-type dust collector, In general, a method of carrying out an evaluation test of a filter cloth by appropriately transporting to a test place is adopted (for example, see Patent Document 1).

  By the way, the above method is generally used as a method for grasping the current performance of the filter cloth in use, but in addition to this, the gas from the filter cloth is detected as a filter cloth damaged during operation. A method of detecting the diffuse reflection density by irradiating the exit with beam light has also been proposed (see, for example, Patent Document 2 and Patent Document 3).

By the way, in the sampling performance evaluation method generally adopted as the above-mentioned filter cloth evaluation test, the test items of the filter cloth include tensile strength, elongation rate, air permeability (before and after the adhered dust is removed), basis weight (dust adhesion amount). ) ・ Photomicrograph ・ Semi-folded diameter test, and performance evaluation items include physical strength (performance of filter cloth fiber itself) and filtration performance (performance as filter cloth), of which filtration performance The evaluation is performed based on air permeability (before and after adhesion dust removal) and a micrograph.
By the way, in these tests, the filter cloth taken out from the dust collector is transported to a performance test place using transport means such as a transport vehicle.
However, in the conventional method, during transport from the dust collector installation location to the test location, calcium chloride contained in the dust adhering to the filter cloth absorbs moisture in the air, causing condensation and deliquescence. As a result, the properties of the dust changed greatly, and there was a problem that the filter cloth evaluation test could not be performed according to the actual situation.
Further, the method for detecting a filter cloth damaged during operation of the dust collector is intended for the filter cloth that is actually damaged, and there is a problem that the performance of the current filter cloth cannot be grasped.
Japanese Utility Model Publication No. 51-011420 Japanese Patent Laid-Open No. 04-104038 JP-A 63-294921

  In the present invention, in view of the problems of the conventional filter cloth evaluation test method for a filter type dust collector, the filter cloth attached in the dust collector is in a state in which the properties of the dust attached to the filter cloth do not change. The purpose of the present invention is to provide an evaluation test method for a filter cloth for a filter-type dust collector that can carry out an evaluation test of a filter cloth with high accuracy in accordance with the actual situation by carrying it to a test place and evaluating the filter cloth. To do.

  In order to achieve the above object, the filter test method for a filter dust collector of the present invention is a filter filter for a filter dust collector in which the filter cloth for evaluation is extracted from the filter dust collector and transported to a test place to evaluate the filter cloth. In the cloth evaluation test method, the filter cloth immediately after being removed from the filter-type dust collector is enclosed in a synthetic resin bag whose inside is evacuated and transported to the test place, and the bag is opened at the test place. The filter cloth is taken out and evaluated.

  In this case, a synthetic resin bag provided with an air suction valve capable of evacuating the inside with the filter cloth put in can be used.

  According to the evaluation test method of the filter cloth for filter type dust collector of the present invention, the filter cloth immediately after being taken out from the filter type dust collector is enclosed in a synthetic resin bag whose inside is evacuated and transported to a test place. Since the bag is opened at the test site and removed from the bag for evaluation of the filter cloth, the absolute amount of moisture in the bag made of synthetic resin can be reduced, and it is contained in the dust adhering to the filter cloth. Calcium chloride that absorbs moisture in the air prevents condensation and deliquescence from occurring, and this makes it possible to perform highly accurate filter cloth evaluation tests that do not change the properties of the dust. be able to.

  In addition, by using a synthetic resin bag provided with an air suction valve that can be evacuated with the filter cloth inside, the inside of the bag can be sucked by sucking the air inside the synthetic resin bag. Can be easily maintained in a vacuum state.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an evaluation test method for a filter cloth for a filtration dust collector according to the present invention will be described below with reference to the drawings.

1 to 4 show a synthetic resin bag 1 that is used during conveyance in the evaluation test method for a filter cloth for a filter-type dust collector of the present invention.
The synthetic resin bag 1 is made of a synthetic resin such as polyethylene and has a size capable of storing the filter cloth removed from the dust collector. Can be substituted.
More specifically, the synthetic resin bag 1 is formed by bonding three sides of the square synthetic resin sheet 2 so that the opening 4 is formed on one side, or by attaching one side of the square synthetic resin sheet 2. Sealed to seal the opening 4 with the suction valve 3 disposed at the opening 4 and a filter cloth inside the opening 4 except for the suction valve 3. Means 20 are provided.

  The sealing means 20 is not particularly limited, but a fastener or a chuck tape as an occlusion tool can be used. For example, as shown in FIG. 2, a cross-section T-shaped consisting of a head portion 21a and a neck portion 21b. From the chuck tape in which the male claws 21 and the female claws 22 having L-shaped receiving portions 22a and 22a that are allowed to be bent and allowed to enter the head 21a are arranged in pairs (two rows). Composed. In order to further improve the internal airtightness of the synthetic resin bag 1, a plurality of chuck tapes (in the illustrated embodiment, two pairs of chuck tapes (two rows) at a distance, a total of four rows). ) Can also be arranged.

FIG. 3 shows another embodiment of the sealing means 20.
A sealing means 20 shown in FIG. 3A includes a receiving member 23 having a U-shaped cross section having a length wider than the width of the opening 4, and a cylindrical fitting member 24 that fits into a recess of the receiving member 23. The receiving member 23 and the fitting member 24 are positioned above and below the synthetic resin bag 1 in the vicinity of the opening 4 of the synthetic resin bag 1, and the fitting member 24 together with the synthetic resin bag 1 is received by the receiving member 23. The inside is sealed by pressing and fitting into.

  Further, the sealing means 20 shown in FIG. 3B is such that the vicinity of the opening 4 of the synthetic resin bag 1 is welded by the heaters 25, 25, and the heater may be arranged only on one side. .

The suction valve 3 is not particularly limited, but a suction valve provided with a check valve can be used. For example, as shown in FIG. As shown in FIG. 4 (b), a check valve 34 in the form of a valve plate is provided in addition to the arrangement of the film check valve 32 for blocking the air flow in the direction opposite to the direction of the arrow. Alternatively, the suction pipe 33 may be used.
When the suction valve 3 is composed of a synthetic resin sheet, a sealing means 20 is also provided at the suction valve 3 portion, and the suction valve 3 is sealed to the vicinity of the suction valve 3 when sucking the internal air. By allowing the male claws 21 to enter the female claws 22 including the air leakage, air leakage from the suction valve 3 can be reliably blocked.
Further, the suction valve 3 may be disposed at a position other than the opening 4 as shown by the dotted line in FIG.

  And when performing the evaluation test of the filter cloth for filter-type dust collectors, it chooses arbitrarily from many filter cloths suspended in the filter-type dust collector similarly to the performance evaluation method by the conventional extraction. Or a plurality of filter cloths are extracted and immediately stored in the synthetic resin bag 1.

The opening 4 of the synthetic resin bag 1 containing the filter cloth is sealed by the sealing means 20.
Thereafter, the internal air is sucked out from the suction valve 3 by using any suction means such as a vacuum cleaner, and the internal air is almost sucked out (theoretically, it is impossible to make a complete vacuum state, In this case, this state is referred to as a “vacuum state”) (the synthetic resin bag 1 in a vacuum state is prevented from invading air from the outside by the sealing means 20 and the suction valve 3, and is vacuumed. The state can be maintained.) By this, the absolute amount of moisture in the synthetic resin bag 1 is reduced, and calcium chloride contained in the dust adhering to the filter cloth absorbs moisture in the air, Prevents condensation and deliquescence from occurring.

  In this way, by blocking the air from around the filter cloth, the dust attached to the filter cloth in the dust collector is prevented from absorbing moisture in the air, and the properties of the attached dust are maintained while maintaining the properties of the attached dust. The bag 1 is unpacked at an appropriate place, for example, a land route by a transport vehicle, the bag 1 is opened at the test place, and the various performance tests described above are performed on the filter cloth taken out from the bag 1.

  At this time, in particular, in the air permeability (before and after removal of attached dust) test, the dust attached to the filter cloth is characterized by the fact that the filter cloth is enclosed in the synthetic resin bag 1 whose inside is a vacuum. Therefore, it is possible to conduct a highly accurate evaluation test of the filter cloth in accordance with the actual situation.

  As mentioned above, although the evaluation test method of the filter cloth for filter-type dust collectors of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, and does not deviate from the meaning. The configuration can be changed as appropriate within the range.

  The evaluation test method of the filter cloth for a filter type dust collector of the present invention is to carry the filter cloth for testing to the test place in a state where the property of the dust adhering to the filter cloth does not change, and to evaluate the filter cloth. Therefore, it can be suitably used for an evaluation test of a filter cloth for a filter-type dust collector, beginning with a case where time is required for transportation from the place where the dust collector is installed to the test place.

It is a front view of the bag made from a synthetic resin used for the evaluation test method of the filter cloth for filter type dust collectors of this invention. Sectional drawing of the sealing means used for a synthetic resin bag is shown, (a) is in a state before sealing, (b) is in a state where a male nail enters a female nail, (c) is in a state after sealing. is there. Another embodiment of the sealing means used for the synthetic resin bag is shown, (a) is a perspective view of a partial cross section of the pressure-bonding type sealing means, and (b) is a part of the heat-sealing type sealing means. It is sectional drawing. The suction valve used for the bag made from a synthetic resin is shown, (a) is sectional drawing using a film-like check valve, (b) is sectional drawing using a valve-plate-like check valve.

Explanation of symbols

1 Plastic bag 20 Sealing means 3 Suction valve

Claims (2)

  Extract the filter cloth for evaluation from the filter-type dust collector, transport it to the test place, and evaluate the filter cloth.In the filter-collector filter evaluation test method, the filter cloth immediately after being removed from the filter-type dust collector is vacuumed. Evaluation of a filter cloth for a filter cloth type dust collector, which is sealed in a synthetic resin bag, transported to a test place, opened at the test place, taken out of the bag and evaluated for the filter cloth. Test method.   The method for evaluating and testing a filter cloth for a filter cloth type dust collector according to claim 1, wherein a bag made of a synthetic resin is used which is provided with an air suction valve capable of evacuating the inside with the filter cloth inserted.

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