JPS61178013A - Dust collector - Google Patents

Abstract

PURPOSE:To especially collect a large amount of micron-order particles with a particle size of a 0.1mum or less continuously with high efficiency, by allowing a particle-containing air stream guided to a dust collector to successively pass through an air bubble collecting section filled with high pressure air bubbles and a bubble washing section by a pressurized liquid shower. CONSTITUTION:A particle-containing air stream (b) is introduced into an air bubble collecting section A from an air stream suction port 7 to be allowed to pass through a flow channel filled with high pressure air bubbles W. Herein, particles (a) are separated and removed from the air stream (b) with high efficiency by the efficient adsorbing action of the high pressure air bubbles W. The air stream (b) flowed out from the outlet 4 of said section A is further guided to a bubble washing section B and washed with the washing solution injected from pressure showers S so as to block the channel of the air stream (b). Bubbles are burst in this section B and adsorbed particles are separated and removed from the air stream (b) along with the residual particles in the air streams (b) while the air stream (b) is further continuously washed by plural stages of succeeding showers S and exhausted to the open air from an exhaust port 8.

Description

[Detailed description of the invention] (Industrial application field) The present invention mainly uses fine metal particles continuously.

It also relates to a dust collector that can collect a large amount of dust, and more specifically, it collects particles with a particle size of 10 μm or less, and especially 0.1 μm or less.
This invention relates to a dust collector that is effective in collecting microparticles smaller than μ.

(Prior art) Particles with a diameter of 10 μm or more have been easily collected using various known devices such as gravity dust collection, inertial dust collection, centrifugal dust collection, cleaning collection, filtration dust collection, and electrostatic dust collection. Although it is possible, 10
Effective means for collecting particles smaller than μ are cleaning dust collection, collectively called scrubbers, and filtration dust collection (bags and filters).

Electrostatic precipitators (cotton/I/) are said to be effective for collecting particles of 0.1 μm or less.

(Problems to be Solved by the Invention) However, the design and operation quality of the flapper and bag filter greatly affect the collection efficiency, and it is particularly difficult to collect particles of 1μ or less.

must be performed by equipment that has been constructed with particular care;
Even if we consider the individual methods, it is impossible to collect microparticles of 0.1μ or less with bag filters or scrapers, and the trick 8 is to collect microparticles of 0.1μ or less. It is capable of collecting microparticles and is said to have the best performance.
In addition to being expensive, it is difficult to handle, and in addition, it is not effective at all when microparticles are supplied in large quantities.

Further, depending on the fine particles to be handled, for example, carbon, wood, coal, aluminum, magnesium, etc., there is a risk of particle dust explosion, and careful handling is required.

The present invention has been developed by comparing and examining each of the conventional means described above, and as a result of many years of research and experimentation, it is possible to completely collect coarse particles of 5μ or more, and to collect microparticles of KO01μ or less, which is unparalleled. The purpose of the present invention is to provide a dust collection device that can perform dust collection continuously at a high rate and in large quantities.

(Means for solving the problems) In order to achieve the above technical problems, the dust collector of the present invention has K,
A method of flotation and sedimentation was adopted.

To be more specific, as shown in Figure 1, the airflow (b) containing various particles (b) led to the dust collector.
A bubble collection compartment is filled with high-pressure bubbles.

The air bubble collection section (4) is formed into an airtight space equipped with an air flow inlet (7) and an outlet (4), and high-pressure air is continuously injected into the water mixed with a foaming agent. An appropriate shower device is provided which includes an airflow inlet (5) and an exhaust port (8), and sprays a cleaning liquid in the form of a shower into the airflow path from the inlet to the exhaust port so as to block the airflow path. It is scattered.

In the above configuration, collision plates are provided in multiple stages in the air flow direction in the bubble collection section, and it is also possible to use inertial dust collection, and in the bubble cleaning section, showers and filters are arranged alternately. It is also possible to use a combination of collection with a filter.

The bubble collecting section and the foam cleaning section may be formed by any appropriate means, such as connecting two sealed tanks together, or partitioning one sealed tank into two spaces with a partition wall, or by communicating the two compartments. This is carried out by means such as a duct outside the tank or a pipe or hole penetrating the partition wall.

Various known foaming agents may be used as the foaming agent supplied to the air bubble collection section depending on the particles contained in the air stream, but soap liquid is convenient in terms of handling and cost, and cleaning liquid is sprayed from a shower device. In addition to a circulation system in which the washed cleaning fluid is repeatedly used, a method of discharging the cleaning fluid outside the compartment and always injecting new cleaning fluid can also be adopted, and the cleaning fluid may also be water only if necessary.

In order to obtain high-pressure bubbles, air is compressed using a compressor or the like, and the air is injected from a bubble generating pipe placed in a liquid containing a foaming agent.

A pressure shower uses a pressure pump such as a gear pump to pressurize cleaning liquid and spray it from a sprinkler/water pipe.

(Function) Next, the function of the dust collector of the present invention will be explained. When the particle-containing airflow leading to the air bubble collection section passes through a flow path filled with high-pressure air bubbles (g), the particles contained therein ( A), regardless of whether it is coarse or microscopic, is separated and removed from the airflow with high efficiency by the efficient adsorption action of this high-pressure cellular ceramic. The airflow that has passed through this bubble collection section is then further transferred to the bubble cleaning section (
It leads to B). At this time, some bubbles are also introduced, but the airflow together with these bubbles is subjected to the cleaning action of the pressure shower (S), the bubbles are broken, and the adsorbed particles are removed from the airflow together with the particles remaining in the airflow. After being separated and removed, the air stream is further exposed to the cleaning action of a multiple-stage displacement shower and then discharged into the atmosphere. In this way the airflow ρ)
The high-pressure bubbles in the air bubble collection area (g) and the foam cleaning area (
By being continuously exposed to the pressure shower (S) in step 8), a large amount of coarse and micro particles K are adsorbed with high efficiency by the high-pressure bubbles that are generated without interruption even if they are continuously fed. Oh, again! &＼Continuous cleaning with a copying shower makes it possible to collect highly efficiently, which cannot be achieved with conventional various devices.

(Example) Next, an embodiment of the dust collector of the present invention will be described based on the drawings.

(1) is an airtight tank that forms a 9C dense foam compartment, (2) is an airtight tank that forms a foam cleaning compartment (8) that is integrally connected above it, and both tanks are separated by a partition wall (3). However, there are a pair of left and right communication holes (4), (4), (5), provided near the top of the side walls (1m) and (2m), respectively.
When (5) are connected to each other by ducts (6) and (6), they are particularly communicatively connected. (7) is an airtight foaming tank (1
) is a communication hole (4) formed in the opposite side wall (1b) opposite to the side wall (1a) provided with (4), and is a particle-containing air inlet (8) is a foam cleaning tank ( 2) Communication hole (5)
, (5) is an exhaust port provided in the earthen wall (2b) near the opposite side wall (2a) on the opposite side. Therefore, the communication hole (4) on the country side of the airtight foam compartment.

(4) is the air outlet from the compartment, and the communication hole (5) on the foam cleaning compartment +8) side is the foam compartment (Al
This serves as an inlet for the airflow discharged from the foam washing section (θ) and sucked into this foam washing section (θ). The suction port (7) is connected to a dust duct (9) whose one end is connected to the exhaust side of a blower at the work site, and the exhaust port (8) is connected to a duct, αQ.
A V-rotsuko fan, which serves as an exhaust device αη and is installed on the upper wall of the tank (2b), is connected through the tank.

Both the suction port and the exhaust port are located in the center of the tank in the left and right width direction.

And the communication hole (4) from the 9IC* foaming 11 (1) inner O1 wall (ld) and suction n (7) side? (4) It is formed on the sloped bottom wall that slopes downward one after another toward the side, and is recessed near the side wall (1) where the communicating holes (4) and (4) are located. ) is formed, and a drainage pipe (2) equipped with pulp for discharging the accumulated particles out of the tank is connected to this particle reservoir.

The bubble generator is constructed as follows. That is, above the inclined bottom wall (1d), there are bubble generating pipes α→... (4 pipes in the example) at predetermined intervals along the inclination direction and having dimensions equal to y for the total length in the left and right direction of the tank. are provided, one end of which projects outside the tank and is connected to the main air supply pipe. This bubble generating pipe α◆... is equipped with numerous air ejection holes on the pipe wall. The main air supply pipe (to) has a pressure gauge (
A compressed air supply pipe (b) from a compressor (not shown) is connected to the supply port (1sb) of the main pipe terminal, and a pulp (15 m
) so that pressurized air of 0.8 to 0.5 is always supplied to the main pipe.

A predetermined amount of a mixed solution of water and limestone liquid is injected into the foaming tank (1), and W and L are water levels. Also, the foaming tank (1
), from the suction port (7) side to the communication hole (4), and from the bulkhead (3) to the collision plate (T) at predetermined intervals toward the (4) side.
...is installed vertically. These collision plates (towards) are formed in an inclined position with the lower free end side facing the communication hole (4), and the lower end edge is at the same level as the lower end of the suction port (7). Or, the upper r dimension is set to be lower, but the water level W and L are set to be higher, and in the example shown, two pairs of short and long lengths are provided. There is. This collision plate (g) mainly performs an inertial dust collection function for coarse particles. Moreover, this group of collision plates (to) is arranged to be exactly opposite to the installation area of the bubble generating pipe αQ. (II is water pulp.

Next, the foam cleaning j4 (2) has a communication hole (5), and a plurality of filters (three in the example shown) are installed in the middle of the airflow path from the communication hole (5) to the exhaust port (8) in a state that blocks this. members are vertically installed from the earthen wall (2b) at predetermined intervals in the air flow direction. The bottom wall (2d) of this foam cleaning tank (2) is also formed into a sloped bottom wall that becomes lower in order from the communication hole (5) and (5) side toward the discharge port (8) side, It injects a fixed amount of water and possible soda, (W, L)
is the water level.

The shower equipment is constructed as follows. In other words, the watering vibrator e2-11 has many or countless watering holes.
Provided above the tank and along the entire length of the tank in the left and right direction.
When using a two-filter together, the upper part between each filter or each water pipe (21) is connected to the upper wall (21) as shown in the figure.
2b) The main water supply pipes arranged above are firmly connected to each other, and a pressurized water supply pump (a gear pump is shown in the example shown) installed on the earthen wall is connected to the main pipes (b).

The water sprinkling holes of the water sprinkling pipe e211... are provided in pairs on the left and right sides around the pipe axis on the lower surface of the pipe, and the water sprinkling angle is set to about 45°.

In addition, (2~ is a water intake pipe whose lower end is located near the lowest part of the inclined bottom wall (2d), and whose upper end is connected to the water intake of the water supply pump (to) to circulate the cleaning liquid (T). be.

In the figure (24 is Water Supply Pulp Co., Ltd., (26 is both tanks)
1).

The water level gauge installed in (2), the fin is a bypass pipe that discharges the overflow water from the foam cleaning tank (2) to the airtight foaming tank (1) below, (c) (28/) is the hatch, and the fin is the exhaust. The drive motor for the device (b), - is the drive motor for the water supply pump, Gυ is the drain pipe equipped with pulp, and Z is the manhole μ. The filter (1)... may have different upper and lower dimensions, but all have the same dimensions and the water level is!
It is also good to set the upper and lower dimensions so that the lower edges are at the same level.

Next, the operation of the structure of the above embodiment will be explained.

First, water pulp (1 liter, 1 ounce,
(Incorporated) and pour in water appropriately, then pour a predetermined amount of soap solution into the airtight foaming tank (1) and a predetermined amount of soluble soda into the foam cleaning tank (2). Next, the pulp (15a) is opened to supply compressed air to the main air supply pipe (G), and the valve (15a) is supplied with compressed air.
A) is applied to the pressure piece so that the appropriate pressure is always 0.8 kVd -0.5#/d, and this pressurized air is sent to each bubble generation pipe α→... from the nozzle hole into the mixed liquid. The foam is ejected to generate air bubbles and the airtight foaming tank (2) is filled with high-pressure soap foam. Also, at the same time, the water supply pump (to)
is operated to send pressurized water with a discharge pressure of 31 to each water sprinkling pipe υ... through the main water supply pipe, and injecting it from the water sprinkling holes to form pressure =, V, water tS)....

Next, the amount of soap foam in the airtight foam $ti (1) is sufficient (8
After confirming through the hatch glass window (28@) that the foaming density is higher than the foaming density, the on-site blower and exhaust system are activated, and the dust-containing airflow (
B) is sent into the airtight foaming tank (1).

The inhaled airflow p) collides with the collision plate (top) and is redirected downward, but particles, especially coarse particles, lose their own energy to fly due to the collision, and due to their own weight they collide with the collision plate (top). It falls downward along the line and is separated by the air current.
In addition, those that were not separated by the first collision plate will be efficiently separated by the same effect by the subsequent collision plates, but the nuclide (1) will be filled with high-pressure soap bubbles. Especially in the area where the collision plate exists, the airflow passage formed between it and the water surface is greatly narrowed and is overcrowded with soap bubbles. It shows a high rate of not only coarse particles but also fine particles, especially vaporized metals, and an unparalleled recovery rate of vaporized metal microparticles can be expected.

The above recovery rate is for the particle-containing gas at the metal spraying site, and the metal melted by the arc or flame during thermal spraying is 0.1 μ to 150 μm due to the jet air flow.
At the same time as it is crushed into particles up to μ in size, a large amount of ion gasified microparticles of 0.1 μ or less are generated, and it contains all of these microparticles.

The airflow from which particles are separated in the airtight foaming tank (1) is
6) The foam is sucked from (6) into the cleaning tank (2) and has a multi-stage filter action and pressure shower (S)...
At the same time, some of the bubbles carried by this suction airflow to the foam washing tank (2) are also subjected to the filtering action and washing action to break the bubbles, and the adsorbed particles are absorbed by the airflow. The remaining particles are separated from the 9C situation and fall or are collected. Then, the airflow, which has been purified by removing particles, is exhausted into the atmosphere from the exhaust port (8) through the duct αO and the exhaust device αη.

In addition, although the airtight foaming tank (1) and the foam cleaning tank <2) were installed vertically in parallel in the structure of the above embodiment, they do not necessarily have to be installed vertically. It is also possible to arrange them in a vertical row. Also, if they are installed side by side in the left and right direction, considering ventilation resistance, etc., a duct for communication between both tanks) (6).

(6') It is preferable to use one large-diameter tube and place it in the center of the tank. This communication duct) (6),
(6') is disposed outside the tank, but it may be configured such that a pipe penetrates the partition wall (3) and stands up inside the foam cleaning tank (2).

In addition, the bubble generating pipe α is not limited to the illustrated pipe, but may be a bag or a box made of a material having open cells. It may also be formed in the form of

(Effects of the Invention) The dust collector of the present invention combines the continuous adsorption action of high-pressure bubbles with the continuous cleaning action of a pressure shower, thereby removing coarse particles.
Needless to say, it is capable of collecting even microparticles of 0.1μ or less with extremely high efficiency and continuously, unlike conventional scoopers. Compared to bag filters, the design and operation are significantly simpler, and the hK can be provided at a lower cost, completely overcoming technical constraints such as having to rely on carefully constructed equipment.

Furthermore, since the collecting action is carried out in a highly humid atmosphere, there is no risk of dust explosion, and it can be handled safely and easily.

[Brief explanation of drawings]

Fig. 1 is an original knee diagram of the dust collector of the present invention, Fig. 2 and Fig. 4 show a concrete implementation configuration, Fig. 2 is a sectional view, and
The figure is an external view, and FIG. 4 is an external view shown by the arrow Y in FIG. 3. Explanation of symbols (1)... Airtight foaming tank, (2)... Foam cleaning tank, (3)... Bulkhead, (4)...
Exit, (5)...Inlet, (6)...
duct), (7)... Intake port, (8)...
・Exhaust port, (9)... Dust duct, (b)...
・・・Exhaust device, α◆・・・Bubble generation pipe,
(16... Main air supply pipe, QB+...
Collision plate, kiln...Filter, hiatus...Water pipe, kiln...Main water supply pipe, (to)...
・Water supply pump, former prisoner, bubble collection section, (B)...
... Foam cleaning section, (W) ... Air bubbles, (S)
...pressure jaws, (a) ...airflow, (b) ...particles. Applicant Masumi Hamamura Agent
Patent Attorney Takashi Mizuguchi - Figure 1 Rin 2 Figure 3 Day 4

Claims (3)

[Claims] (1) A bubble collection section (A) formed in an airtight space including an airflow inlet (7) and an outlet (4), an airflow inlet (5) and an exhaust port connected to the outlet (4); (8) is installed in parallel with the foam cleaning section (B) formed in an airtight space, and pressurized air is continuously supplied to the foaming agent mixed liquid injected into the bubble collecting section A bubble generator is installed to generate high-pressure bubbles by injecting air into the air, and a cleaning liquid high-pressure shower is installed in the foam cleaning section to block the airflow path from the airflow inlet (5) to the exhaust port (8) along the airflow direction. A dust collector characterized in that it is provided with a shower device for forming dust. (2) The foam washing section (B) is provided with a filter (20) for blocking the airflow channel in multiple stages along the airflow direction. dust equipment. (3) In the bubble collecting section (A), collision plates (18) are provided at predetermined intervals from the inlet (7) side to the outlet (4) side. ) The dust collector described in section 2.