JPH105567A - Treating device of dust - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a device and to surely remove dust by dividing the inside space of a drum into a dust-containing gas supply section and a gas discharge section and wetting a gas permeating part of a gas permeable disk type capturing member rotating around a shaft center. SOLUTION: A dust-containing gas is introduced from a charging port 7 with a sucking and discharging blower 18 and on the other hand, water W is supplied from outside and ejected from nozzle pipes 5A-5C to respective filters 3A, 3B as the gas permeable disk type capturing member in the drum 1. The ejected water is stuck to the filter 3A to be in wetting state and simultaneously rotates the filter 3A by the kinetic energy of the ejecting flow. The dust-containing gas, to which positive pressure is impressed, is brought into contact with water on the surface of the filter 3A at the time of passing through the filter 3A to capture the dust matter by water. If the dust is contained yet, the dust matter is captured by water in the wetted filter 3B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing dust from a dust-containing gas when the dust-containing gas flows out of a suspension tank or the like that forms a slurry by stirring and mixing the powder with a liquid such as water. More particularly, the present invention relates to an apparatus for processing dust such as slaked lime, gypsum, or fine-particle cement, which is itself liable to be scattered as dust and adversely affects the human body.

[0002]

2. Description of the Related Art In general, as a material such as a soil improving agent, a material obtained by mixing powder such as slaked lime, gypsum, or fine particle cement with water to form a slurry is sometimes used.

[0003] One embodiment for this will be described with reference to FIG. 1.
Is supplied to a suspension stirring tank 32 by a screw conveyor 31. For example, water W is supplied to the suspension stirring tank 32,
After the slurry is stirred by the stirrer 33 to be slurried, it is guided to the destination U.

In this case, if the suspension stirring tank 32 is open to the atmosphere, the powder P scatters when falling into the stirring tank 32. Therefore, it is desirable to keep the lid as shown.

However, since the powder P cannot be dropped in a completely closed state, it is necessary to open a part of the stirring tank 32 to the atmosphere. As a result, a part of the input powder P escapes from the open opening to the atmosphere and is scattered to the atmosphere as dust.

[0006]

However, the finer the dust, the finer the dust, the more the worker inhales the human body, and the more the dust scatters around, causing a deterioration in the working environment.

At present, there is no effective means for solving this problem. For example, it is conceivable to attach a filter to the opening, but the filter needs to be cleaned or replaced frequently, and is not suitable for on-site work.

Therefore, a simple dust processing apparatus is required.

Accordingly, an object of the present invention is to provide an apparatus which is simple and can reliably remove dust.

[0010]

According to the present invention, which solves the above-mentioned problems, the invention according to claim 1 partitions a drum and an internal space of the drum into a dust-containing gas supply chamber and an exhaust chamber,
And a gas-permeable board-shaped capturing member that rotates around an axis,
A dust-containing gas inlet formed in the dust-containing gas supply chamber, an exhaust port formed in the exhaust chamber, and wetting means for wetting a gas-permeable portion of the board-shaped capturing member are provided. Dust treatment device.

According to a second aspect of the present invention, there is provided the dust processing apparatus according to the first aspect, wherein the wetting means is a nozzle for projecting a liquid onto the surface of the board-shaped capturing member.

According to a third aspect of the present invention, there is provided a dust processing apparatus according to the second aspect, wherein the dust-containing liquid that catches the dust and flows down to the lower portion of the drum is circulated to the nozzle and ejected from the nozzle. It is.

According to a fourth aspect of the present invention, there is provided a structure in which the liquid ejected from a nozzle is projected obliquely to a vertical plane of the disk-shaped capturing member to rotate the disk-shaped capturing member. Or a dust processing apparatus according to 3.

The invention according to claim 5 is the dust treatment apparatus according to any one of claims 1 to 5, wherein a viewing window is provided on a side surface of the drum so that an internal space of the drum can be visually recognized.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. 1 is a front sectional view of a processing apparatus according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is 3-3 in FIG.
FIG. 4 is a sectional view taken along line 4-4 of FIG.

In the dust treatment apparatus according to the present invention, a cylindrical drum 1 is fixed to a base 2 so that a center line of rotation is along a horizontal direction. A filter 3 made of, for example, a wire mesh forming the member.
A, 3B rotary shaft 4 is provided, and the filter 3
A and 3B are configured to rotate around the rotation axis 4.

The rotary shaft 4 is a rotary shaft for the filters 3A and 3B, and at the same time, a liquid feed passage for the liquid introduced into the drum 1 is provided therein. , Four nozzle tubes 5 protruding along the radial direction
A dust processing liquid, for example, water is supplied to A to 5D. The nozzle pipes 5A and 5B are ejected obliquely to the filter 3A, and the nozzle pipes 5C and 5D are ejected obliquely to the filter 3B. 3A and 3B are configured to rotate in the same direction.

A dust-containing gas supply chamber 1A is provided between the end plate of the drum 1 and the filter 3A.
A, a charging port 7 is formed, and the above-described opening 32a of the stirring tank 32 is formed.
And a conduit 6 to introduce a dust-containing gas. An exhaust chamber 1B is provided between the end plate of the drum 1 and the filter 3B, and an exhaust port 8 for clean air is formed in the exhaust chamber 1B.

In the lower part of the drum 1, there are provided an extraction pipe 9 for taking out the processing slurry S in which dust is mixed with water, and a circulation pipe 10. A return pump 11 is provided in the take-out pipe 9, and can return the processing slurry S containing the target powder to the stirring tank 32 via the return path 12.

Although only the water W supplied from the outside can be jetted from the four nozzle tubes 5A to 5D,
In this case, the amount of the processing slurry increases sequentially, and it is necessary to use many accessories to detect the concentration of the processing slurry to be returned and to adjust the target concentration of the suspended slurry. It is desirable to reduce the amount of water to be supplied.

Therefore, the circulation pump 10 is connected to the circulation conduit 10.
It is desirable to provide the nozzle pipe 3 and circulate through the circulation pipe 14 to each of the nozzle pipes 5 </ b> A to 5 </ b> D via the liquid feed path in the rotary shaft 4. A filter 15 can be provided at the entrance of the circulation conduit 10 if necessary. Also, an on-off valve 16 for supplying the water W and stopping the supply after that, and a gate valve 17 used at the time of cleaning the filter 15 can be provided only in the initial operation.

On the other hand, an end plate of the drum 1 is provided with a transparent window 19 made of acrylic so that the inside of the drum 1 can be visually recognized. The transparent window 19 is convenient for visually confirming the driving situation.

In the processing apparatus having the above structure, for example, the dust-containing gas exhausted from the suspension tank 32 is taken in, and
Dust treatment is performed as described below.

That is, the dust-containing gas is exhausted from the opening 32a of the stirring tank 32 in accordance with the amount of the powder P charged.
The dust-containing gas is introduced from the inlet 7 by using the exhaust pressure as it is or by using the suction / discharge blower 18 shown in FIG.

On the other hand, water W is supplied from the outside and the nozzle pipe 5
Filters 3A and 3B in drum 1 from A to 5D
To each. The projected water is filtered 3A
The filter 3A is rotated by the kinetic energy of the projected flow while being wet while adhering to the filter.

Since the dust-containing gas is subjected to a positive pressure, when passing through the filter 3A, it comes into contact with water on the surface of the filter 3A, and the dust is captured by the water. The water that has captured the dust flows down to the lower part of the drum 1. The clean gas from which the dust has been removed passes through the filter 3A and goes to the exhaust port 8.

If the gas that has passed through the filter 3A still contains dust, the dust is captured by water when passing through the filter 3B that is similarly wetted. As a result, only the clean gas is exhausted from the exhaust port 8.

At the beginning of the operation, the nozzle tubes 5A to 5A
Inject water from D. To reduce the amount of treated water,
At a predetermined time, the on-off valve 16 is closed, the gate valve 17 is opened, the circulation pump 13 is started, and the dust-containing water flowing down to the bottom of the drum 1 is circulated as the dust-containing liquid. Thereafter, the dust removal processing from the dust-containing gas is performed using only the dust-containing liquid.

On the other hand, as the operation continues, the concentration of the dust in the dust-containing liquid increases, so that at a certain time, the processing slurry S is transferred to the suspension tank 32 through the return path 12 by using the return pump 11. Return to. Thus, there is no need to discard the slurry discharged from the processing system to the outside.

(Others) In the present invention, it is necessary to rotate and wet the filters 3A and 3B as the disk-shaped capturing members. If not wetted, filters 3A, 3
In the case where B is clogged with the dust and the fine particles are the main object of the present invention, the filter 3A, 3B has almost no dust removing effect and does not rotate.
, It is necessary to always project water, for example, over the entire surface of the filters 3A and 3B, and a large amount of water is required. On the other hand, when the filters 3A and 3B are rotated, the positions of the filters 3A and 3B are sequentially changed with the rotation by projecting water on a part of the filters 3A and 3B. It can be kept wet. Further, as shown in the preferred embodiment described above, by projecting water onto the filters 3A and 3B, the dust that is likely to adhere to the eyes of the filters can be captured by forcibly washing away the dust.

In the above example, the filters 3A, 3B
Although the filters 3A and 3B are rotated by the liquid projected from the nozzles for moistening the filter, the filters 3A and 3B can be rotated together with this rotation method or separately, for example, by providing a motor for rotating the rotation shaft 4.

As a means for moistening the filters 3A and 3B, a means for sprinkling water along the surfaces of the filters 3A and 3B from above can be used. In some cases, water or dust-containing liquid may be stored at a certain level (for example, up to near the rotation center axis) in the lower part of the drum 1.

In addition to one filter, an appropriate number can be used according to the particle size of the target powder and the required cleanliness.

On the other hand, instead of blowing off the dust clogged in the mesh of the filter 3 by the projection liquid ejected from the nozzle tube 5, the bristle tip comes into contact with the mesh of the filter 3 as shown in FIGS. When the brush 20 is fixed to the drum 1 and the filter 3 rotates, the powder that tends to clog the filter 3 can be scraped off by the brush 20.

[0035]

As described above, according to the present invention, there are advantages that the apparatus is simple and that dust can be reliably removed.

[Brief description of the drawings]

FIG. 1 is a front vertical sectional view of a processing apparatus according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 1;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 1;

FIG. 5 is a front vertical sectional view showing another embodiment.

FIG. 6 is a sectional view taken along line 6-6 of FIG.

[Explanation of symbols]

1 ... drum, 1A ... dust-containing gas supply chamber, 1B ... exhaust chamber,
2 ... Base, 3A, 3B ... Filter, 4 ... Rotating axis, 5A
5D: nozzle pipe, 6: pipe, 7: loading port, 8: exhaust port, 9: extraction pipe, 10: circulation path, 11: return pump, 12: return path, 13: circulation pump , 14: circulation pipe, 15: filter, 19: transparent window, S: treated slurry, W: water.

Claims (5)

[Claims] 1. A drum, a gas-permeable board-shaped trapping member which partitions an internal space of the drum into a dust-containing gas supply chamber and an exhaust chamber, and rotates around an axis; A dust processing apparatus comprising: a formed dust-containing gas inlet, an exhaust port formed in the exhaust chamber, and a wetting unit that wets a gas-permeable portion of the board-shaped capturing member. 2. A dust processing apparatus according to claim 1, wherein said wetting means is a nozzle for projecting a liquid onto the surface of said board-shaped catching member. 3. The dust processing apparatus according to claim 2, wherein the dust-containing liquid that catches the dust and flows down to a lower portion of the drum is circulated to the nozzle and ejected from the nozzle. 4. The dust collecting device according to claim 2, wherein the liquid ejected from the nozzle is projected obliquely to a vertical surface of the disk-shaped capturing member to rotate the disk-shaped capturing member. Processing equipment. 5. A dust processing apparatus according to claim 1, wherein a viewing window is provided on a side surface of said drum so that an internal space of said drum can be visually recognized.