JP2000153119A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold the use ratio of a used filter and to reduce an arranging number, an arranging space and the on-off number of times of a lid accompanied by the replacement of a filter. SOLUTION: In a filter equipped with a container consisting of a cylindrical body (vertical body) 1 housing filter elements 4 for treating gas and the upper lid 3 closing the upper opening of the cylindrical body 1, a plurality of the filter elements 4 are housed in the cylindrical body 1 so as to be made detachable by the opening and closing of the upper lid 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter processing apparatus, a dust collecting apparatus, an off-gas processing apparatus for radioactive waste processing, and the like, and more particularly to a filter apparatus suitable for filtering or chemically adsorbing and removing fine particles in a gas. About.

[0002]

2. Description of the Related Art In a conventional filter device, as shown in FIG. 4, one filter element (filter) is housed in a cylindrical body (vertical body), and an upper opening is closed with an upper lid. It is a device that purifies and treats gas such as gas. The filter element 4 is placed on an element receiving plate 12 provided around the lower inner surface of the cylindrical body 1, and the filter element 4 is fixed by being pressed against the element receiving plate 12 by a clamp bolt 6 provided on the upper surface. The processing gas enters the filter device through the inlet nozzle 13, is filtered when passing outside the filter element 4, and the purified gas that has flown out of the filter element 4 is discharged from the outlet nozzle 14.

On the other hand, the replacement of the filter element 4 is performed by the following method. When removing the filter element 4, remove the bolt 9 from the body flange 2, remove the lid 3 while hanging it with the handle 10, loosen the clamp bolt 6 provided on the upper inner surface of the cylindrical body 1, and turn the clamp 7 to rotate the filter element. After freeing the element 4, the element suspending tool 11
Then, the filter element 4 is taken out from the cylindrical body 1. When a new filter element 4 is mounted in the cylindrical body 1, the procedure is reversed in the reverse procedure.

In this conventional method, since one filter element is housed in the apparatus, two apparatuses must be installed in case two-stage installation is necessary in order to remove objects to be removed from the processing gas. It is necessary to connect them in series with piping. Of course, if gas treatment is required even during the replacement of the filter element, a total of four devices are required to install the same number of devices in parallel. The size of the filter element is usually determined by the size and size of the used filter element to be sealed or packaged. One size is a size that can be accommodated in a 200-liter drum.

When the filter device is installed, for example, in a case where the filter element is filled with a chemical adsorbent and the primary filter element on the upstream side breaks through and is backed up by the secondary filter element on the downstream side, the case of a series installation is adopted. , 2
In order to increase the usage rate of the secondary filter element, the secondary filter element is also taken out of the filter device at the same time when the primary filter element is replaced, and reinstalled in the primary filter device. In this case, in the prior art, both lids of the filter devices installed in series are opened, the filter element inside is taken out, the used primary filter element is discarded or stored, and the used secondary filter is used. The element is moved to the primary filter device and reused, and a new filter element is installed in the secondary filter device.

In other words, the lid of the filter device which does not need to be replaced is opened. When the processing gas is toxic or has a radioactive substance, remote control is required when opening and closing the lid. In addition, when it is necessary to maintain a constant chemical adsorption reaction in the filter device, the filter device is heated by an electric heater or the like installed outside the filter device. That is, in the related art, filter devices corresponding to the number of filter elements are required.

[0007]

In the conventional filter device, it is preferable that the opening and closing of the lid be as small as possible when the processing gas has toxic or radioactive substances.
Since filter devices are required in accordance with the number of filter elements, there are problems such as difficulty in heating the filter device and an increase in the frequency of opening and closing of the lid due to restrictions on the installation location.

An object of the present invention is to provide a filter device capable of preventing a decrease in the usage rate of a used filter element and reducing the number of filter elements, installation space, and the number of times of opening and closing of a lid accompanying replacement. It is in.

[0009]

In order to achieve the above-mentioned object, a filter device according to the present invention comprises a vertical cylinder housing a filter for purifying gas, an upper lid closing an upper opening of the vertical cylinder. In a filter device provided with a container made of a plurality of filters, a plurality of filters are housed in a vertical body, and each filter is detachable by opening and closing an upper lid.

[0010] Each filter is vertically stacked and is removably accommodated by opening and closing the upper lid, or each filter is opened to reuse the downstream filter of the processing gas. In this case, the filter may be moved to the upstream side, a new filter may be installed downstream, and then the upper cover may be closed and replaced.

Further, the gas processing apparatus includes any one of the above-mentioned filter devices, and is configured to purify the gas.

According to the present invention, a plurality of filter elements are vertically stacked, and the upper lid is opened and closed, and the upper lid is removably stored in the cylindrical body. Therefore, the lower filter element is placed on the element receiving plate, and The filter element is fixed by pressing with a crank bolt, and the filter element is sequentially replaced by one opening and closing of the lid.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, a container including a cylindrical body (vertical body) 1 for housing a filter element (filter) 4 for purifying a gas such as a gas, and an upper lid 3 for closing an upper opening of the cylindrical body 1 is provided. The filter device includes a plurality of filter elements 4 housed in a cylindrical body 1, and each filter element 4 is configured to be detachable by opening and closing an upper lid 3.

Then, each filter element 4
Are stacked one above the other so as to be detachable from above during replacement, and a single top cover 3 is used to improve the usage rate.
Opening and closing the secondary filter element 4 on the downstream side of the processing gas
Can be relocated to the upstream side for reuse, and a new filter element 4 can be installed downstream. In other words, each filter element 4 removes and holds the downstream filter element 4, removes the upstream primary (lower) filter element 4, and then removes the downstream 2
It can be replaced by relocating the next (upper) filter element 4 and stacking a new filter element 4 downstream.

The structure when the gas is the processing gas will be described in detail. The cylindrical body 1 has an element receiving plate 12 provided on a lower inner surface and an inner flange 2 provided on an upper inner surface.
2 and a flange 9 around the upper outer surface. A processing gas outlet nozzle 14 is provided slightly below the inner surface flange 22, and a processing gas inlet nozzle 13 is provided below the inner flange 22. The lid 3 is screwed to the upper surface of the flange 2 by bolts 9 with the packing 15 interposed therebetween, and an O-ring 8 for sealing is provided between the inner surface of the lid 3 and the cover 5 covering the inner surface. A handle 10 used for opening and closing is fixed to the upper surface of the lid 3.

A plurality, for example, two filter elements 4
As shown in FIG. 2, the filter elements 4 are vertically stacked via gasket packings 17 fixed to the bottoms of the respective filter elements 4, and the lower filter elements 4 are attached to the element receiving plate 12 by the gasket packings 17.
, And the upper surface of the upper filter element 4 is fixed to the element receiving plate 12 by the clamp bolt 6 via the clamp 7. On the upper surface of each filter element 4, as shown in FIG. 3, recesses are formed in the top plate portion 24 and the bottom plate portion 25 so as not to interfere with the stacking, and the element hanging members 11 are accommodated. The top plate portion 24 and the bottom plate portion 25 are provided with required openings through which the processing gas can flow.

As described above, the filter elements 4 are stacked in the upper and lower stages, the lower filter element 4 is placed on the element receiving plate 12, and the upper filter element 4 is pressed by the plurality of clamp bolts 6. As a result, the packing 17 seals between the element receiving plate 12 and the lower filter element 4 and between the upper and lower filter elements 4. The cylindrical body 1 has a body flange 2
Then, the lid 3 is fastened by the bolt 9 with the packing 15 interposed therebetween, and the lid 3 is closed. The lid 3 can be removed by removing the bolt 9. The processing gas enters the filter element 4 from the inlet nozzle 13 of the cylindrical body 1, is filtered when passing outside the filter element 4, and the gas discharged outside the filter element 4 is discharged from the outlet nozzle 14. .

Next, the operation of this embodiment will be described. The clamp 7 rotates after the clamp bolt 6 is loosened, and is operated when the filter element 4 is inserted into or taken out of the cylindrical body 1. A plurality of clamps 7 are arranged in the circumferential direction, and the number is suitable for fixing the filter element 4 with the clamp bolts 6. The number is determined by the size of the filter element 4 and the like, but is usually about six. A plurality of guides 16 are provided inside the cylindrical body 1. This is to improve the positioning and insertability when the element suspending tool 11 of the filter element 4 is grasped by a remote operation device such as a crane or a robot and inserted into the cylindrical body 1.

Although the filter elements 4 are stacked in two stages, there is a place between the upper and lower filter elements 4 where a processing gas may leak and a bypass leak may occur as compared with the case of one stage. Gasket packing 17 prevents leakage as in the case between the filter element 4 and the filter element 4. It is necessary to select an appropriate material for the gasket packing 17 depending on the processing gas temperature, corrosive substances in the processing gas, and the like. However, gasket packing 1
7 is attached to the bottom of the filter element 4 and becomes waste together with the filter element 4. In the case where the filter element 4 is stacked in two stages, it is necessary to accommodate the element hanging member 11, which is, as shown in FIG.
A recess may be provided in the top plate portion 24 and the bottom plate portion 25 of the filter element 4 and the element suspending tool 11 may be installed in the top plate portion 24.

According to another embodiment of the present invention, the cylindrical body may have a rectangular cylindrical shape instead of a cylindrical shape.
The apparatus is configured to process a gas with any one of the filter devices.

According to the present invention, a filter device having the same gas throughput and the same removal performance can be used without changing the filter element usage rate, for example, in a system requiring two filter elements, The number of 2
Can be reduced by a factor of one. However, although the height of the device is increased only by the height of one filter element, the installation space of the filter device can be reduced to half. Further, the number of external heaters of the filter device and the control system thereof can be reduced to half. However, the work area of the external heater is increased only by an amount corresponding to the height of one filter element. Further, when replacing the filter element, the number of times of opening and closing the lid of the filter device can be reduced to half. When a normal gas is treated, an operator can naturally replace the filter element.

As a well-known example, the used filter cartridge is reused to improve the use efficiency.
The object of this known example is a box-shaped filter installed in a casing with a horizontal box-shaped cross section, and the object to be handled is a ventilation air-conditioning system or a treatment with a very low concentration of radioactive substances. This is a technique for gas, in which a processing gas flow rate is relatively large, and replacement of a filter or the like is performed by an operator directly or by using a jig. Therefore, in the known example, a caster is attached to the lower side of the filter cartridge to facilitate movement in the casing. The filter device of the present invention assumes that the processing gas to be handled is at a low flow rate of 1 order or more and the concentration of radioactive substances and harmful substances is 100 to 1000 times higher. In consideration of the harmfulness and harmfulness, it is usually not possible for the operator to perform the operation directly, but it is configured so that the primary and secondary filter elements can be replaced by opening and closing the lid once by remote control. Significantly different targets.

[0023]

According to the present invention, it is possible to reduce the number of installations, installation space, the number of control systems such as external heaters and the like while maintaining the usage rate of the filter, and to reduce the number of times the lid is opened and closed when replacing the filter. , Safety can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a sectional view showing a part of FIG. 1;

FIG. 3 is a sectional view showing a part of FIG. 1;

FIG. 4 is a cross-sectional view showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical cylinder 2 Body flange 3 Lid 4 Filter element 5 Cover 6 Clamp bolt 7 Clamp 8 O-ring 9 Bolt 10 Handle 11 Element hanging tool 12 Element receiving plate 13 Inlet nozzle 14 Outlet nozzle 15 Packing 16 Guide 17 Gasket packing 22 Inner surface flange 24 Top plate 25 Bottom plate

Claims (4)

[Claims] 1. A filter device comprising: a vertical cylinder housing a filter for purifying gas; and a container comprising an upper lid for closing an upper opening of the vertical cylinder, wherein the vertical cylinder includes:
A filter device, wherein a plurality of the filters are accommodated, and each of the filters is detachable by opening and closing an upper lid. 2. The filter device according to claim 1, wherein the filters are stacked vertically and are removably stored by opening and closing an upper lid. 3. Each filter is moved to the upstream side so that the upper lid is opened and the filter on the downstream side of the processing gas is reused, and a new filter is installed on the downstream side. 3. The filter device according to claim 1, wherein the filter device is closed and replaced. 4. A gas processing apparatus comprising the filter device according to claim 1, 2 or 3, and purifying gas.