JP2000126533A - Dust collecting method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for collecting dust which are provided with both of the high dust collecting efficiency which a dry type dust collector has and the fire-proofing property which a wet type dust collector has. SOLUTION: This dust collecting apparatus comprises a tank 3 for housing a liquid 5 with little volatility, a chamber 7 communicating with an upper part of the tank 3, a suction port 13 formed in an open part 11, which is formed in a side wall of chamber 7 and partitioned by a partitioning wall 9, and communicates with the tank 3, a highly efficient collision type filter 15 installed in the inside of the chamber 7, a discharge port 19 formed in the upper wall of the chamber 7, and a dry type filter 21 installed under and near the upper wall of the chamber 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting method and a dust collecting method for collecting dust generated by processing such as a laser processing machine and a plasma processing machine.

[0002]

2. Description of the Related Art In a conventionally known dry dust collector, it is possible to change the size of dust that can be separated by the coarseness of a filter that separates and collects dust in intake air by the filter. Further, a conventionally known wet dust collector separates and collects dust in intake air by collision separation or weight by trapping water or mist and dust. In addition, high-temperature dust can be collected. Further, there is known a wet dust collector in which a dry filter is attached to an exhaust port.

[0003]

However, in the above-mentioned conventional dry dust collector, there was a problem that the filter would burn if the temperature of the dust was high. Further, in the conventional wet dust collector, for example, the dust collection efficiency with respect to dust generated by processing by a laser beam machine is about 95%, and there is a problem that dust having a smaller particle diameter is exhausted without being collected. Further, in the case where a dry filter is attached to an exhaust port of a conventional wet dust collector, there is a problem that the dry filter is quickly clogged by high humidity air exhausted from the wet dust collector.

An object of the present invention is to provide a dust collecting method and a dust collecting apparatus which combine the good dust collecting efficiency of a dry dust collector with the fire prevention performance of a wet dust collector.

[0005]

According to a first aspect of the present invention, there is provided a dust collecting method according to the first aspect, wherein dust is sucked from a suction port together with intake air into a tank containing a liquid having low volatility. Thereafter, the dust is collected by a high-performance collision filter and exhausted from an exhaust port.

According to a fourth aspect of the present invention, there is provided a dust collecting apparatus according to the present invention, wherein a tank containing a liquid having a low volatility, a chamber communicating with the upper part of the tank, and an opening provided on a side wall of the chamber with a partition wall. A high-performance collision filter provided in the chamber, and an exhaust port provided on an upper wall of the chamber. .

Therefore, dust is sucked together with intake air from a suction port at an opening provided in a side wall of the chamber and partitioned by a partition into a tank containing a liquid having low volatility. After that, the sucked dust passes through the low-volatility liquid stored in the tank and is collected by the high-performance collision filter provided in the chamber, and then the exhaust port provided on the upper wall of the chamber. More exhausted.

Thus, the frequency of liquid replenishment is reduced while maintaining the fire-protection ability of the wet type, and the need for an automatic replenisher is eliminated.

In the dust collecting method according to the present invention, dust is sucked together with intake air from a suction port into a tank containing a liquid having low volatility, and then collected by a high-performance collision filter. It is characterized in that dust is collected by a dry filter and exhausted from an exhaust port.

[0010] According to a fifth aspect of the present invention, there is provided a dust collecting apparatus according to the present invention, wherein a tank containing a liquid having low volatility, a chamber communicated above the tank, and an opening provided on a side wall of the chamber with a partition. A high-performance collision filter provided in the chamber, an exhaust port provided in the upper wall of the chamber, and a lower portion in the upper wall of the chamber. Dry filter and
It is characterized by comprising.

Therefore, dust is sucked together with the intake air into the tank containing the less volatile liquid from the intake port at the opening formed by partitioning the side wall of the chamber with the partition. After that, the sucked dust passes through the less volatile liquid contained in the tank, is collected by the high-performance collision filter provided in the chamber, and is provided near the upper wall of the chamber. After being further collected by the dry filter, the air is exhausted from an exhaust port provided on the upper wall of the chamber.

Thus, the frequency of liquid replenishment is reduced while maintaining the fire protection capability of the wet type, and the need for an automatic replenisher is eliminated. Furthermore, the high dust collection ability of the dry type is also provided.

According to a third aspect of the present invention, in the dust collecting method of the first or second aspect, the liquid having low volatility is a silicon coil.

According to a sixth aspect of the present invention, in the dust collecting apparatus of the fourth or fifth aspect, the liquid having low volatility is a silicon coil.

Therefore, by using silicone oil as the liquid having low volatility, the replenishment frequency is reduced as compared with the case of using water without impairing the performance of the wet type dust collector using water, and aluminum and magnesium powder can be safely used. Collected.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a dust collector 1 has an upright tank 3, in which a low vapor pressure as an example of a liquid having low volatility is provided. The silicon coil 5 is accommodated. Moreover, a chamber 7 is communicated above the tank 3. An opening 11 partitioned by a partition 9 is formed on one side wall, for example, a right side wall of the chamber 7. The opening 11 is provided with an intake port 13 for sucking dust together with intake air into the tank 3.

A high-performance collision filter 15 is provided in the chamber 7 substantially at the center in the height direction. A fan 17 rotatable by a drive motor is provided in the chamber 7 above the high-performance collision filter 15.
Is provided. An exhaust port 19 is provided on the upper wall of the chamber 7 and the exhaust port 19
A dry filter 21 is provided in the chamber 7 in the vicinity of the lower portion of the chamber 7.

With the above configuration, the silicon coil 5 is housed in the tank 3 in advance. In this state, the dust is sucked together with the intake air from the intake port 13 in the opening 11 provided on the right side wall of the chamber 7 and partitioned by the partition wall 9 and sent into the tank 3. Then, after colliding through the inside of the silicon coil 5 housed in the tank 3, it is evaporated upward as shown by the arrow, collected by the high-performance collision filter 15, and further upward by the fan 17. After being sent as indicated by the arrow and collected by the dry filter 21, the dust is discharged from the exhaust port 19.

The dust is caused to collide with the silicon oil 5 stored in the tank 3 together with the intake air from the intake port 13. Therefore, the liquid temperature does not rise even if the high-temperature dust is sucked. Further, air containing dust generated when processing with a laser processing machine or the like is at room temperature, so that the liquid temperature does not increase even if it is sucked for a long time. For this reason, the liquid stored in the tank 3 does not ignite if the flash point temperature is 50 ° C. or higher,
If the flash point is above ℃, it can be operated sufficiently safely.

Furthermore, if a liquid having a low volatility and a low vapor pressure is used as the liquid, the temperature of the exhaust air is substantially the same as that of the intake air, so that the dry filter 21 can be attached to the exhaust port 19, and Therefore, it is possible to operate the apparatus without replenishing the liquid for a long period of time because the decrease due to the vaporization is small.

It is desirable to use silicone oil (silicone grease) as the liquid satisfying the above specifications. Since this silicone oil has excellent chemical stability, it does not react with dust and can be used as a dust collector for aluminum dust and magnesium dust. For example, water is dangerous when water is given when aluminum powder or magnesium powder is burning, but it is dangerous because silicon oil (silicone grease) has a fire extinguishing action and does not react even if it is in contact with aluminum or magnesium for a long time Things.

By having the high-performance impact filter 15 and the dry filter 21, it is possible to have both the fire protection ability of the wet type and the high dust collection ability of the dry type. The dry filter 21 provided near the exhaust port 19 can be used without being clogged for a long time.

In the above embodiment, an example was described in which the dry filter 21 was provided in the vicinity of the exhaust port 19. However, without providing the dry filter 21, the conventional water could be stored in the tank 3 instead of being provided. For example, it is also possible to use a liquid having a low volatility such as silicone oil by simply storing the liquid therein.

The present invention is not limited to the above-described embodiment of the invention, but can be embodied in other modes by making appropriate changes.

[0025]

As will be understood from the above description of the embodiments of the present invention, according to the first and fourth aspects of the present invention, the tank containing the less volatile liquid is provided with the partition wall on the side wall of the chamber. Dust is sucked together with intake air from an intake port in an opening provided as a partition. After that, the sucked dust passes through the low-volatility liquid stored in the tank and is collected by the high-performance collision filter provided in the chamber, and then the exhaust port provided on the upper wall of the chamber. More exhausted.

Thus, the frequency of liquid replenishment can be reduced while maintaining the fire protection capability of the wet type, and the need for an automatic replenisher can be obviated.

According to the second and fifth aspects of the present invention, dust is sucked together with intake air into the tank containing the liquid having low volatility from the inlet provided at the opening formed by partitioning the side wall of the chamber with the partition. Let me know. After that, the sucked dust passes through a low-volatility liquid contained in the tank and is collected by a high-performance collision filter provided in the chamber.
The dust is further collected by a dry filter provided in the vicinity of the upper wall of the chamber, and then exhausted from an exhaust port provided on the upper wall of the chamber.

Thus, the frequency of liquid replenishment can be reduced while maintaining the fire-protection capability of the wet type, and the need for an automatic replenisher can be eliminated. Further, the high dust collecting ability of the dry type can be provided.

According to the third and sixth aspects of the present invention, the silicone oil is used as the less volatile liquid, so that the performance of the wet dust collector using water is not impaired, and the frequency of replenishment is reduced as compared with the case of using water. And aluminum and magnesium powder can be safely recovered.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a dust collector according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dust collector 3 tank 5 silicon coil (liquid with low volatility) 7 chamber 9 partition 11 opening 13 intake port 15 high-performance collision filter 17 fan 19 intake port 21 dry filter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01D 50/00 501 B01D 50/00 501A

Claims (6)

[Claims] 1. A collection method comprising: sucking dust together with intake air from a suction port into a tank containing a liquid having a low volatility, collecting the dust with a high-performance collision filter, and discharging the dust from an exhaust port. Dust method. 2. Dust is sucked together with intake air from a suction port into a tank containing a liquid having low volatility, then collected by a high-performance collision filter, further collected by a dry filter, and exhausted from an exhaust port. Dust collection method characterized by the following. 3. The dust collecting method according to claim 1, wherein the liquid having low volatility is a silicon coil. 4. A tank containing a liquid having low volatility, a chamber communicating with the upper part of the tank, and an intake port communicating with the tank at an opening provided on a side wall of the chamber divided by a partition. And a high-performance collision filter provided in the chamber, and an exhaust port provided on an upper wall of the chamber. 5. A tank containing a liquid having a low volatility, a chamber communicating with the upper part of the tank, and an intake port communicating with the tank at an opening provided on a side wall of the chamber partitioned by a partition. A high-performance collision filter provided in the chamber, an exhaust port provided in an upper wall of the chamber, and a dry filter provided near a lower portion of the upper wall in the chamber. A dust collector characterized by the following. 6. The dust collector according to claim 4, wherein the liquid having low volatility is a silicon coil.