JP3322820B2 - Powder separation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing element in which a gasket interposed between a filter element for separating gas and powder and a mounting portion for supporting the filter element is in close contact with the filter element and the mounting portion. It relates to a high-grade powder separation device.

[0002]

2. Description of the Related Art Conventionally, there has been known a powder separation apparatus for filtering or recovering solid powder from air or factory waste gas containing fine solid powder such as dust. FIG. 7 is a schematic view of a powder separating apparatus of this type. This powder separating apparatus 31 is formed from a self-supporting porous material on an element mounting portion 14 provided below the inside of a casing 32. The formed flat box-shaped filter element 11 is erected vertically, and the periphery of an opening at the lower end of the filter element is fixed to the mounting portion 14. And
The mounting portion 14 is held on a separation gas discharge pipe 35 attached from below one side wall of the casing 32 to below the other side wall. It communicates with the tube 35. A backwash gas supply pipe 36 is inserted into the gas discharge pipe 35.

As shown in FIG. 8, a filter element mounting portion 14 is provided between a lower end opening of a flat box-shaped filter element 11 and the element mounting portion 14.
An elongated and thin gasket 15 is interposed in a compressed state, and both ends of the filter element 11 in the longitudinal direction are attached by bolts 12 and nuts 13. This gasket 15 is attached to the lower end of the filter element 11. A plurality of filter elements 11 are arranged close to each other in the front and back directions on the paper surface of FIG.

The gas to be separated supplied from a gas supply pipe (not shown) is filtered by the filter element 11, the powder adheres to the surface thereof, and the separated gas is separated from the opening at the lower end of the filter element 11. It enters the separation gas discharge pipe 35, through which it is led to the main gas pipe 40 outside the casing 32 and exits the device. The powder adhering to the surface of the filter element 11 drops by its own weight when the amount of the powder increases, but when the filtration capacity is reduced, the backwash gas is backwashed through the backwash gas main pipe 37 and the valve 38. When the gas is supplied from the supply gas supply pipe 36, the gas flows and the vibration of the filter element 11 accompanying the gas causes the filter element 11 to fall away from the surface of the filter element 11 and to fall below the lower mounting portion 14 because the width of the lower mounting portion 14 is narrow. And collects in the hopper 39. In the above powder separation device,
The opening of the filter element 11 faces downward, but there is another configuration in which the opening faces upward and suspends the filter element 11.

[0005]

By the way, the gasket 15 used in the above-mentioned powder separating apparatus 31 includes:
Generally, a sponge-like silicone gasket is used. Since this gasket 15 is sponge-like,
The compression set is small, and no gap is formed with respect to the mounting portion 14 of the filter element 11. However, silicones are inferior in acid resistance.
That is, when the gas to be separated contains an acidic gas (for example, sulfuric acid or the like) or there is a reaction that generates such a gas,
The silicone gasket is exposed to the acidic gas, and is deteriorated and ragged over a long period of time, and falls off partly, thereby improving the sealing effect between the filter element 11 and the mounting portion 14 thereof. There is a problem in that the separation processing ability is lost.

On the other hand, the filter element 11 is formed flat as described above, and is mounted on the mounting portion 14 by the bolts 12 and the nuts 13 only at both ends in the longitudinal direction due to the requirement of space efficiency. Therefore, as the size of the filter element 11 increases, the surface pressure at the intermediate portion in the longitudinal direction decreases, and a gap is generated between the gasket 15 and the mounting portion 14, and the separation processing capability of the powder separation device decreases as described above. There is a problem of causing.

[0007] As a usual method for solving this problem, a sponge-like silicone gasket is used for the gasket 15, but as described above, such a silicone has poor acid resistance, and has an acidic gas. There is a problem that it cannot be used in an existing environment. Further, it is conceivable to use a sponge-like Teflon gasket for the gasket. Teflon is superior in acid resistance to silicone, but has poor elasticity. For this reason, with a Teflon gasket, it is not possible to prevent a decrease in the surface pressure of the intermediate portion in the longitudinal direction, and a gap may be generated between the gasket itself and the element mounting portion 14.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a powder separation apparatus provided with a gasket having both excellent properties of compression set and acid resistance.

[0009]

An object of the present invention is to provide a powder separating apparatus for separating powder from gas by providing a flat box-shaped filter element made of a self-supporting porous material in a casing. Mounting parts at both ends in the longitudinal direction of the open end face of the filter element, and the box-shaped filter
Element mounting part and element mounting of the casing
Fastening means for fastening the respective parts, and one of the fastening means
Part of the box-shaped filter element
Elastic body and hydrogenated nitrile rubber
Formed using wood, a gasket solid structure for sealing the gas interposed between the open end surface and the element attaching portion of the filter element, said box shape
Between the filter element and the element mounting part
A clearance gap provided to prevent plastic deformation of the gasket.
This is achieved by a powder separation apparatus characterized by comprising

In addition, the thickness of the gasket at the intermediate portion in the longitudinal direction is thicker than the thickness at both ends in the longitudinal direction . to this
Thus , even if the pressing force of the intermediate portion of the filter element against the element mounting portion is weak, the surface pressure of the entire gasket can be made substantially uniform, and the gasket can be brought into close contact with the element mounting portion. Therefore, there is almost no gap between the filter element and the gasket.

Further, since the gasket is made of a hydrogenated nitrile rubber having a solid structure, the gasket has a small compression set, is excellent in acid resistance, has little deterioration even when exposed to an acidic gas, and has a long life. , Close contact with the element mounting part,
It is possible to increase the degree of sealing of a portion of the powder separating device that separates the dress and the gas.

When a ridge is formed along the edge of the gasket in an annular shape on the surface of the gasket on the element mounting portion side, the gasket is sandwiched between the filter element and the element mounting portion by the mounting means. Since the ridge is crushed and elastically deformed, the gasket is brought into close contact with the element mounting portion, and the degree of sealing is increased.

Further, when the ridge is formed in multiple layers, any one of the ridges is formed.
If one ridge is damaged, the other undamaged ridge maintains the seal between the gasket and the element mount.

Further, when the cross-sectional shape of the ridge in the width direction is triangular, the tip of the ridge in contact with the element mounting portion is easily elastically deformed, and the degree of sealing between the gasket and the element mounting portion is increased.

Further, if the mounting means is provided with an elastic body for urging the filter element to the element mounting portion, the generation of a gap due to "set" (compression set) due to the aging of the gasket is prevented.

[0016]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. Parts having the same structure as in the related art are denoted by the same reference numerals as in FIGS. Since the structure of the filter element 11 is the same as that of FIG. 8, the following description will be focused on the mounting portion. The filter element 11 of the powder separating device
It is mounted to the element mounting portion 14 in an upright state by mounting means 16 comprising a nut 13 and a nut 13. Bolt 1
2 penetrates through the washer 20 and the elastic body 21 which is a disc spring. The elastic body 21 includes a coil spring, an acid-resistant ring-shaped rubber, and the like in addition to the disc spring.

A gasket 22 is sandwiched between the filter element 11 and the element mounting portion 14. The gasket 22 is made of solid hydrogenated nitrile rubber, and is formed to be elongated and flat. Further, a ventilation hole 23 through which gas passes is formed. Then, the intermediate portion 22a in the longitudinal direction of the gasket 22
Is the thickness (T1) of the longitudinal end 22b.
2) It is set thicker. By the way, gasket 22
When the length in the longitudinal direction is 1035 mm, the difference between the thickness (T1) of the intermediate portion 22a and the thickness (T2) of the end portion 22b is preferably about 1 mm.

The gasket 22 is attached to the filter element 11 by an adhesive. Gasket 2
2 has a gasket 2 on the surface 22c on the element mounting portion side.
Protrusions 24 along the edge of 2 are formed annularly and doubly. The height of the ridge 24 is substantially uniform over the entire circumference. The widthwise cross-sectional shape of the ridge 24 is an isosceles triangle. A preferable angle of the vertex is about 53 degrees. Note that the widthwise cross-sectional shape of the ridge 24 may be semicircular. U-shaped notches 25 for receiving the bolts 12 are formed at both ends in the longitudinal direction of the gasket 22.

In the above configuration, when the bolt 12 and the nut 13 are tightened, the gasket 22 is sandwiched between the filter element 11 and the element mounting portion 14. At this time, the ridges 24 are slightly crushed and increase the degree of sealing between the filter element 11 and the element mounting portion 14. Moreover, since the ridges 24 are formed in two layers, the degree of sealing is reliably increased. When the bolts 12 and the nuts 13 are tightened, as shown in FIG.
A gap gauge G is inserted between the filter element 11 and the element mounting part 14.

In the gasket 22, since the thickness of the intermediate portion 22a is set to be larger than the thickness of the end portion 22b,
Even if the pressing force of the mounting portion 16 on the intermediate portion 22a of the gasket 22 is weaker than that of the end portion 22b, the surface pressure of the entire gasket 22 can be made substantially uniform, and between the intermediate portion 22a and the element mounting portion 14. The degree of sealing can be increased without creating a gap.

Further, the elastic body 21 can prevent the gasket 22 from undergoing "set" (compression set) due to aging.
The gasket 22 can be sandwiched between the filter element 11 and the element mounting portion 14, and the occurrence of a gap can be prevented.

The gasket 22 of the present invention is made of solid hydrogenated nitrile rubber, and has a higher elasticity than a conventional sponge-like gasket made of Teflon or a sponge-like gasket made of silicone rubber. Moreover, since it is excellent in acid resistance, even if it is exposed to an acidic gas, it is possible to maintain a sealed state for a long time without deterioration in elasticity.

[0023]

As described above, since the thickness of the intermediate portion of the gasket is greater than the thickness of the end portion, even if the pressing force of the mounting portion by the intermediate portion is weaker than that of the end portion, the intermediate portion and the element mounting portion are not required. The effect of increasing the degree of sealing of the portion for separating gas and powder in the powder separation device without creating a gap between the powder separation device and the separation processing capacity of the powder separation device can be enhanced. Furthermore, since the gasket is made of hydrogenated nitrile rubber, which has excellent acid resistance, even if the gasket is exposed to an acidic gas, the gasket can be separated from the gas in the powder separator without deterioration in elasticity. There is an effect that the sealed state of the part to be maintained can be maintained for a long time. In addition, a box-shaped filter element and an element
By inserting a clearance gauge between the
When tightening the fastening means, overtighten the gasket.
Plastic deformation can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional front view showing a part of a dressing body separation device according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of the dressing body separation device of the present invention.

FIG. 3 is a bottom view of the gasket of the dressing body separation device of the present invention.

FIG. 4 is a sectional view taken along arrow 4-4 in FIG.

FIG. 5 is a sectional view taken along arrow 5-5 in FIG. 3;

FIG. 6 is a cross-sectional enlarged view of a ridge of the gasket of the present invention in the width direction.

FIG. 7 is a schematic diagram of a conventional dressing body separation device.

FIG. 8 is a front view of a portion for separating a dress and a gas in a conventional dress separating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Filter element 16 Attaching means 21 Elastic body 22 Gasket 22a Intermediate part of gasket 22b End of gasket 22c Surface of gasket on the element attaching part side 24 Ridge

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B01D 46/00-46/54

Claims (5)

(57) [Claims] (1) A self-supporting porous material is formed in a casing.
A powder separating device that includes a flat box-shaped filter element and separates powder from gas, comprising : mounting portions at both longitudinal ends of an opening end face of the box-shaped filter element; and a mounting portion of the box-shaped filter element. Casein
Fastening means for respectively fastening the element mounting portions of the
And the box-shaped filter element interposed in a part of the fastening means.
An elastic body for urging the element to the element mounting portion, and a solid formed by using a hydrogenated nitrile rubber material and interposed between the opening end surface of the filter element and the element mounting portion to seal the gas. a gas <br/> packet structure, the said box-shaped filter element the element attaching portion
To prevent plastic deformation of the gasket.
And a gap gauge . 2. The gasket according to claim 1, wherein the gasket is located at an intermediate position in the longitudinal direction.
Part is thicker than the thickness at both ends in the longitudinal direction.
The powder separation device according to claim 1, wherein 3. The gasket on the element mounting portion side
On the surface, a ridge is formed in an annular shape along the edge of the gasket.
The powder separation device according to claim 1 or 2, wherein the powder separation device is used. 4. The ridge is formed in multiple layers.
4. The powder separation device according to 3. 5. The cross section of the ridge in the width direction is triangular.
The powder separation device according to claim 3.