JP4005767B2 - Dust collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust collector for removing harmful substances such as dioxin, and more particularly to a filter for a dust collector used in a high temperature range (about 250 ° C., the same applies hereinafter).
[0002]
[Prior art]
Conventionally, in a dust collector that removes harmful substances such as dioxins at high temperatures, bag-type dust collectors are used to remove harmful substances generated by the combustion process of an incinerator, etc., and dust-like harmful substances are used by the dust collector. Has been removed. However, although dust-like harmful substances can be removed with a conventional dust collector, gaseous harmful substances pass through the filter and are released into the atmosphere as they are. In recent years, health damage and environmental pollution due to dioxins have been regarded as problems, and a method of adsorbing and removing gaseous harmful substances contained in gas discharged from a dust collector using activated carbon or the like has been adopted.
[0003]
[Problems to be solved by the invention]
However, in this case, a device for storing the activated carbon, a device for circulating the activated carbon, and the like are required in addition to the dust collector, so that the facilities are enlarged and there are problems such as an increase in the cost of the installation area and the entire facility.
In view of the above, the present invention is capable of reliably removing not only dusty harmful substances but also gaseous harmful substances in exhaust gas discharged from an incinerator or the like and saving the entire facility in a space-saving manner. The purpose is to provide.
[0004]
[Means for Solving the Problems]
To achieve the above object, the dust collector of the present invention removes dust-like harmful substances from harmful substances discharged from an incinerator or the like with a bag filter that removes dust adhering to the surface by wind pressure. In the dust collector, a plurality of long groove-like shapes permitting the passage of air containing gaseous harmful substances between the bag filter and the purified air chamber formed above the bag filter for removing the dusty harmful substances. A filter cartridge frame holder having openings in parallel is provided, and organic fibers are placed on both sides of a filter main material made of activated carbon fiber that adsorbs gaseous harmful substances with the circulation port interposed between the filter cartridge frame holder and the filter cartridge frame holder. Filter cartridge frame for arranging rectangular flat filter cartridges containing secondary filters attached by the needle punch method in a V shape It placed in correspondence with the respective flow port, covering the upper side of the fluid communication port to air containing gaseous harmful substances through each inlet of the filter cartridge frame from respective flow port corresponds to each distribution port Thus, the gaseous harmful substances are removed by adsorption when passing from one surface of the secondary filter of the filter cartridge arranged in a V shape to the other surface.
[0005]
The dust collector of the present invention having the above configuration can reliably adsorb and remove gaseous harmful substances discharged to the clean side from which dusty harmful substances have been removed by providing a secondary filter using activated carbon fibers. In addition, the activated carbon fiber and the organic fiber can be tightly integrated by attaching the organic fiber using the needle punch method.
Also, a filter cartridge in which a plurality of distribution ports that allow passage of air containing gaseous harmful substances are opened between the purified air chamber formed above the bag filter for removing dusty harmful substances and the bag filter. A secondary comprising: a frame holder, and organic fibers attached to both sides of a filter main material made of activated carbon fiber that adsorbs gaseous harmful substances on the filter cartridge frame holder with the flow port interposed therebetween. By placing the filter cartridge frame for arranging the filter cartridges containing the filters in a V shape, it is possible to secure a sufficient adsorption area while reducing the installation area.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The figure shows an embodiment of the present invention. In the dust collector 1 of the present invention, the inside of the housing 2 is divided into upper and lower parts by a partition wall 3 in the same manner as in the conventional example, and the upper chamber is a purified air chamber 4 and the lower chamber is a dust-containing air introduction chamber 5. The chamber 5 is formed with an inlet 6 for connecting a dust-containing air introduction duct D connected to an incinerator or the like (not shown) on one side, a lower portion is formed in a funnel shape, and a rotary valve RV is provided at the lower end thereof. The purified air chamber 4 is connected to an appropriate suction fan (not shown) via the exhaust duct C, and the purified air is discharged to the outside.
[0007]
A large number of bag filters 7 are suspended from the partition wall 3. A venturi tube 8 is connected to the upper portion of the bag filter 7 so as to protrude toward the purified air chamber 4. The venturi tube 8 is for removing dust adhering to the surface of the bag filter 7 by wind pressure. The venturi tube 8 is divided into a plurality of rows (ten in the figure) in a plurality of rows, and an ejection pipe P is provided for each row. Each jet pipe P is provided with a jet nozzle N so as to face the venturi pipe 8, and the base end of each jet pipe P is connected to a pressure air supply pipe (not shown) via an electromagnetic switch ER. Is done.
[0008]
On the purified air chamber 4 side, a large number of filter cartridge frames 16 are arranged for arranging filter cartridges 12 (FIG. 3) for accommodating secondary filters 9 that adsorb harmful gases in the exhaust in a V shape.
The filter cartridge frame 16 has a plurality of single filter cartridge frames 17 (six in the illustrated example) mounted on a filter cartridge frame receiver 18 having an opening for allowing passage of air containing gaseous harmful substances. It becomes.
[0009]
In the single filter cartridge frame 17, a cartridge insertion port 22 that allows the filter cartridge 12 to advance and retreat from the direction indicated by the arrow Y in FIG. 4 is opened at the top, and an air flow Z containing gaseous harmful substances on both sides is provided. Are provided with an inlet 21 and an outlet 20 that allow the passage of air.
[0010]
The secondary filter 9 is composed of the active carbon fiber 10 for adsorbing harmful gases and the organic fiber 11 on both sides of the secondary filter 9, and the activated carbon fiber 10 and the organic fiber 11 are formed on the surface of the organic fiber 11 with a needle (needle). ) And then attaching by a so-called needle punch method in which the fiber is contracted by heat or chemical treatment.
[0011]
The filter cartridge 12 is configured by attaching a wire mesh 14 and a reinforcing frame 15 to a frame 13 and is formed in a rectangular parallelepiped in which the secondary filter 9 is fixed.
[0012]
In the above configuration, the exhaust gas discharged from the incinerator or the like enters the dust-containing air introduction chamber 5 of the dust collector 1 via the dust-containing air introduction duct D and the introduction port 6 and passes through the bag filter 7 to form dusty harmful substances. In the purified air chamber 4, gaseous harmful substances are adsorbed and removed when passing through the secondary filter 9 arranged in a V shape through the flow port 19 and the flow port 21 of the filter cartridge frame 16. It is discharged to the atmosphere through the outlet 20 and the exhaust duct C.
[0013]
【The invention's effect】
As described above, according to the present invention, activated carbon fibers are used as the filter main material, and a large number of secondary filters having both sides of the filter main material sandwiched between organic fibers are arranged in the purified air chamber. Since the gaseous harmful substances in the exhaust gas from which the harmful substances have been removed are effectively adsorbed and released to the atmosphere, environmental pollution and human health damage around the incinerator can be effectively prevented. Further, since the secondary filters are arranged in a V shape using a filter cartridge frame, the installation area can be reduced and the cost of the entire equipment can be reduced. Furthermore, since the secondary filter combines the activated carbon fiber and the organic fiber by using a so-called needle punch method, the secondary filter has an effect that the both do not peel even in a high temperature range.
[Brief description of the drawings]
FIG. 1 is a longitudinal explanatory view of a dust collector of the present invention.
FIG. 2 is a partial cross-sectional view of a secondary filter.
FIG. 3 is a perspective view of a filter cartridge.
FIG. 4 is a perspective view of a filter cartridge frame.
[Explanation of symbols]
1 Dust Collector 4 Purified Air Chamber 9 Secondary Filter 10 Activated Carbon Fiber 11 Organic Fiber

Claims (1)

In the dust collector in which dust-like harmful substances discharged from an incinerator or the like are removed by a bag filter (7) that removes dust adhered to the surface by wind pressure, the dust-like harmful substances A plurality of long-grooves that allow air containing gaseous harmful substances to pass between the purified air chamber (4) formed above the bag filter (7) and the bag filter (7). A filter cartridge frame holder (18) having openings (19) opened in parallel is provided, and the activated carbon fiber that adsorbs gaseous harmful substances on the filter cartridge frame holder (18) with the circulation port (19) interposed therebetween. A rectangular flat filter cartridge (12) containing a secondary filter (9) in which organic fibers (11) are attached by needle punching on both sides of a filter main material (10) made of Filter cartridge frame for arranging the shape (16) placed in correspondence with each flow port (19), each of said flow port (19) from the inlet of the filter cartridge frame (16) (21) The secondary filter of the filter cartridge (12) arranged in a V shape so that the air containing the gaseous harmful substance that has passed through covers the upper part of the flow port (19) corresponding to each flow port (19) (9) A dust collector, wherein gaseous harmful substances are removed by adsorption when passing from one surface to the other surface.

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