JPH09155137A - Wet-type dust collector for exhaust of cereals processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the generation of bubbles and efficiently separate dust and water droplets by ejecting an air current containing dust mixed with water droplets onto a water level in a water tank from above so that the air current comes into contact with the water level, and then bringing the air current into contact with a mist separating plate. SOLUTION: The sidewall part of a dust chamber 2 is installed upright on the upper opening part of a cleaning water tank part 7, and a mist separating corrugated sheet 5 with a chevron cross section is formed on at least, part of the sidewall part of the dust chamber 2 with the longitudinal side of the mist separating plate 5 positioned vertically or obliquely to form an exhaust outlet part. In addition, a venturi scrubber 4 communicating with the exhaust port of a cereals processing device is attached on the ceiling part 3 of the dust chamber 2. Further, an air current containing dust mixed with water droplets is ejected onto a water level in the cleaning water tank part 7 from above using the venturi scrubber 4, so that the dust and water droplets contained in the exhaust are brought into contact with the water level. Finally, the exhaust now partially free from the dust and water droplets is caused to come into contact with the mist separating plate 5 and is separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain processing apparatus, for example, a wet dust collecting apparatus for exhaust of a joint drying and preparation facility equipped with a grain handling facility for receiving, drying, hulling, preparing and shipping grains and the like. Concerning wastewater treatment equipment for exhaust type wet dust collector of grain processing equipment used for handling grains such as receiving, drying, hulling, preparation or shipping, especially at grain processing facilities such as drying and sorting hull The present invention relates to a wet dust collector for low-pressure exhaust of air containing dust and a wastewater treatment apparatus therefor.

[0002]

2. Description of the Related Art For example, dusts discharged from a joint drying and preparation facility range from grains having a large particle size such as straw debris of rice and wheat, to fine particles such as rice bran and even several microns. Even a very small amount of dust is present in a very wide range, and the amount of dust is large and the apparent specific gravity is also light, making it difficult to remove dust, and a dry dust collector such as a bag filter and a wet dust collector such as a spray tower. Is used. However, since bag filters cause clogging and dust accumulation during long-term use, leading to an increase in pressure loss, spray filters are used as a dust collector for dust discharged from the joint drying and preparation facility. Wet dust collectors such as towers are used.

However, a wet dust collector such as a spray tower is
Although the structure of the spray is simple, the target dust removal efficiency cannot be obtained, so a preliminary dust collector is required, and clogging and dust accumulation occur during long-term use, resulting in pressure loss. There was a problem such as an increase in Therefore,
A large number of spray nozzles are provided at the exhaust inlet of the dust collection chamber, a mist separator is provided above the dust collection chamber, and a perforated plate such as a net or a plate with holes is provided at the bottom of the dust collection chamber. In order to separate coarse dust in the waste water entering the washing water tank, a dust collector with a structure equipped with a scraper tool for scraping dust on the perforated plate is used. There is. In such a wet dust collector, dust is settled and separated from cleaning wastewater containing dust, the cleaning wastewater is purified by separating the dust, and is reused as cleaning water.

[0004]

However, when the cleaning wastewater of the wet dust collector is purified and repeatedly used as cleaning water, the cleaning water becomes dirty and bubbles are generated in the liter conveyor device, and the generated bubbles are generated. It is a problem because it overflows from the wash water tank and stains the surrounding area. In addition, in the wet dust collector having a mist collector on the ceiling, the mist captured by the mist collector is scattered to the outside unless the wind velocity passing through the mist collector is set to 2 m / sec or less. Therefore, in order to increase the processing capacity, the wet dust collector must be upsized, which is a problem.

Further, in the conventional dust collecting chamber, the water flow flowing at the bottom is biased to deposit dust, and the dust deposit falls into the liter conveyor, the filtering ability is lowered, and the seeds of weeds are removed. There is a problem that the perforated plate of the liter conveyor is clogged and the liter conveyor cannot be filtered. It is an object of the present invention to solve the problems relating to the processing capacity of the dust collector and the generation of bubbles in the exhaust type wet dust collector of the grain processing equipment such as the joint drying and preparation facility.

[0006]

The present invention provides a wet dust collector for exhaust of a grain processing apparatus such as a joint drying and preparation facility,
It is an object of the present invention to provide a wet type dust collector which is relatively small in size, has a large processing capacity, and generates little bubbles.

That is, according to the present invention, in a wet type dust collecting method of exhaust gas in which dust in exhaust gas is brought into contact with water droplets to separate, a dust-containing air stream in which water droplets are mixed is jetted from above toward a water surface in a water tank, Dust and water droplets in the exhaust gas are brought into contact with the water surface to separate them, and then the exhaust gas in which a part of the dust particles and water droplets are separated is brought into contact with a mist separation plate that is provided with the longitudinal direction being vertical or inclined. According to the present invention, there is provided a wet dust collecting method for exhaust gas, characterized in that dust and water droplets are separated from the exhaust gas, and the present invention also provides a wet grain collecting chamber having an exhaust gas introducing portion communicating with an exhaust port of a grain processing apparatus. In the wet exhaust dust collector of the device, a dust collecting chamber is provided above the opening of the washing water tank,
A venturi scrubber for introducing exhaust gas is provided downward on the ceiling part of the dust collection chamber, and the mist separation part is provided on at least a part of the side wall part of the dust collection chamber. For wet dust collectors.

Further, according to the present invention, in a wet dust collecting apparatus for exhaust of a grain processing apparatus, wherein the wet dust collecting chamber is provided with an exhaust introducing portion communicating with an exhaust port of the grain processing apparatus, the side wall of the dust collecting chamber is
A mist separator, which is erected on the upper opening of the washing water tank and has a corrugated plate-shaped cross section in at least a part of the side wall of the dust collecting chamber, is provided with its longitudinal direction being vertical or inclined and the exhaust outlet part. Is formed, in the ceiling part of the dust collecting chamber, a venturi scrubber communicating with the exhaust port of the grain processing device is provided in the exhaust type wet dust collecting device of the grain processing device, Further, the present invention is a wet dust collector for exhaust of a grain processing device comprising an exhaust introduction part communicating with the exhaust port of the grain processing device in the wet dust collecting chamber, wherein the side wall of the dust collecting chamber has a sludge conveyor at the bottom. A mist separator having a corrugated plate cross-section, which is erected on the upper opening of the washing water tank provided and stands at least partially on the side wall of the dust collecting chamber, is provided with its longitudinal direction vertical or inclined. An exhaust outlet is formed, and on the ceiling of the dust collection chamber, The venturi scrubber communicating with the exhaust port of the grain processing apparatus is provided downward, and a liter conveyor apparatus is provided through a weir on the side portion of the cleaning water tank. Located in the dust collector.

[0009] The wet dust collecting method and apparatus of the present invention, like the conventional wet dust collecting apparatus for exhaust of grain processing equipment, is a common drying and preparation facility, for example, grain receiving, hulling, rough selection, drying,
It can be used to remove dust generated from preparation and other cereal processing facilities, and can also be used in dryers and other cereal processing equipment with large fluctuations in displacement, but especially in multiple cereal processing equipment. It is useful as a wet dust collector for low pressure exhaust that is used in communication with the exhaust port.

In the present invention, the dust in the exhaust gas is contact-mixed with the water droplets injected in the venturi scrubber. The dust-containing exhaust gas mixed with the water droplets is jetted toward the water surface in the water tank from above at a flow rate of, for example, 10 to 20 m / sec to bring at least a part of the dust particles and water droplets in the exhaust gas into contact with the water surface. To separate. In the present invention, the dust and the mist, that is, the exhaust gas from which mist-like water droplets and a part of the mist are separated, is further provided on a mist separation plate in which the longitudinal direction of the mist separation plate is vertically or inclined. Contact and separate.

In the present invention, the mist separating plate whose vertical direction is vertical or the mist separating plate which is vertically inclined is such that the mist in the exhaust gas is always in contact with and adheres to, and the surface of the mist separating plate is It gets wet with mist,
The mist droplets can flow down to form a kind of wet wall, and dust and mist that remain unseparated in the exhaust gas are separated by contacting the mist separation plate. As described above, the mist droplets attached to the mist separation plate are not blown off even if the flow velocity of the exhaust gas flowing through the mist separation plate is about 6 m / sec.

In the present invention, the exhaust type wet dust collecting apparatus of the grain processing apparatus is provided with a venturi scrubber for introducing the exhaust in the ceiling of the dust collecting chamber, and a mist separator is provided on the side of the dust collecting chamber. An exhaust outlet is formed. The mist separator is provided with a plurality of plate-shaped or corrugated plate-shaped mist separating plates, and each mist separating plate is erected vertically in its longitudinal direction or inclined to form a mist separating chamber. Along the sides,
They are arranged side by side with a gap through which the exhaust gas passes. The mist separating plate of the mist separator at the exhaust outlet is set in the longitudinal direction of the mist separating plate so that the attached mist easily flows down.
It is leaned and fixed to the support frame member at an angle of 0 to 60 °. However, an angle of 90-80 °, more preferably
It is preferable to lean against and fix the support frame member at an angle of 90 to 85 ° because the installation location can be reduced, the wind speed passing through the mist separation chamber can be increased, and the exhaust treatment capacity can be increased. The mist separating plates are arranged in a single stage or in multiple stages with the tops of the chevrons oriented laterally or upward or downward. When arranging the mist separation plates in multiple stages, the tops of the chevron can be oriented in the same direction.
It is also possible to arrange the mountain tops by changing the direction of the peaks for each step.

In the present invention, in order to absorb or shield the noise of the exhaust fan accompanying the exhaust gas from the exhaust gas introducing pipe part, that is, to muffle the noise, the exhaust gas outlet part formed on the side part of the dust collecting chamber. A sound absorbing material or sound insulating material, that is, a sound deadening material,
A mist separating plate having a sound absorbing or sound insulating function, that is, a sound deadening function can be provided. A mist separating plate having a sound deadening function can be provided separately from the mist separating plate. The mist separating plate having such a sound deadening function can be formed by arranging mist separating plates formed of a sound absorbing material such as a porous material and having a corrugated or square cross section in one or more stages. When the mist separating plate is formed of a sound insulating material, a double wall structure, for example, a double wall structure of stainless material, or a composite wall structure,
For example, a sound insulation structure such as a composite wall structure of stainless steel and a porous material or a plastic material is preferable. If the mist separating plate is formed of a sound absorbing material or a sound insulating material and has a sound deadening structure as described above, it is possible to absorb or block the sound of the exhaust fan of the grain processing device and reduce the noise (for example, the actual Kaihei 6-
24723).

In the present invention, the air flow containing the mist from the enlarged portion of the venturi scrubber is discharged toward the washing water tank part and flows toward the side part of the dust collecting chamber, during which the mist droplets are separated from the air flow. Then, it falls directly into the washing water tank. In the present invention, the mist in the air flow that separates the drops and flows to the side of the dust collecting chamber flows downward along the mist separating plate provided at the side of the dust collecting chamber to be separated.

At the throat of the Venturi tube, a fountain nozzle,
Nozzles such as water spray nozzles or spray nozzles are provided.
Intake the exhaust air from the blower into the dust collection chamber. In the present invention, as the Venturi scrubber, a Venturi scrubber having a structure capable of adjusting the size of the opening of the throat of the Venturi tube (see, for example, Japanese Utility Model Publication No. 6-24723) can be used. Use of such a venturi scrubber is preferable because the exhaust pressure can be increased when the blowing pressure of the inflowing exhaust gas is lower than a predetermined value.

In the present invention, the enlarged portion of the venturi scrubber on the discharge side of the throttle portion is directed toward the water surface of the washing water tank portion, and the mist from the enlarged portion of the venturi scrubber is dropped into the washing water tank portion and washed. It becomes drainage, but there is little foaming here, and most of it is naturally defoamed, so there is no problem. This cleaning wastewater contains a lot of dust, and these dusts are settled and separated in the cleaning water tank section. The dust separated by settling collects at the bottom of the washing water tank portion and is taken out of the washing water tank portion by the sludge conveyor. The bottom of the wash water tank part collects dust that has been settled and separated at a predetermined position on the bottom, and the surface around the bottom of the wash water tank part is 45 ° or more so that the precipitated dust and sludge can easily slip off. It can be formed at an angle. Although the height of the washing water tank portion is slightly increased, it is preferable that the washing water tank portion is provided so as to be inclined at an angle of 60 ° or more so as to slide off more easily.

In the present invention, the dust collecting chamber is provided above the opening of the washing water tank, the venturi scrubber for introducing the exhaust gas is provided downward on the ceiling of the dust collecting chamber, and the mist separating section including the mist separator is collected. Since it is provided on at least a part of the side wall of the dust chamber and the cleaning water tank is formed below the dust collecting chamber,
The drops from the Venturi scrubber will be dropped into the wash water tank, and dust can be collected without generating bubbles. Further, in the present invention, the collected exhaust is discharged from the exhaust outlet on the side of the dust collecting chamber, but the mist separating plate at the exhaust outlet is at an angle of vertical to 60 °, preferably at an angle of vertical to 80 °. Further, since it is more preferably provided at an angle of vertical to 85 °, even if the wind speed passing through the mist separating section is 6 m / sec, the mist collected on the separating plate does not scatter.

In the present invention, a sludge conveyor is provided at the bottom of the wash water tank, and an overflow weir is provided at the drain outlet of the wash water tank. In the present invention, a liter conveyor device is provided outside the overflow weir, and large floating dust is separated by the perforated plate. In order to scrape and carry out the dust separated and left on the perforated plate, a scraper for scraping dust is attached to the liter conveyor device, and the scraper moves together with the conveyor of the conveyor device. Further, in the present invention, the sludge settles on the bottom of the wash water tank and is scraped out by the sludge conveyor, so that the sludge does not accumulate in one place. In the present invention, since the perforated plate is provided outside the overflow weir and below the water surface of the wash water tank portion, the liter conveyor device does not generate bubbles in the liter conveyor device.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION One embodiment of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited to the following examples and description. FIG. 1 is a schematic side view of a wet dust collector according to an embodiment of the present invention.
FIG. 2 is a schematic plan view of the wet dust collector shown in FIG. 1. FIG. 3 is a schematic side view of a wet dust collector according to another embodiment of the present invention. 1 to 3, the same reference numerals are used for corresponding members and corresponding portions.

[0020]

1 and 2, a square venturi scrubber 4 is provided on a ceiling portion 3 of a dust collecting chamber 2 of an exhaust type wet dust collecting apparatus 1, and a side portion of the dust collecting chamber 2 is provided. A mist separator 6 is formed by arranging a corrugated plate-shaped mist separating plate 5 in parallel with the large surface side parallel to the exhaust flow direction. A wash water tank 7 is formed below the dust collection chamber 2 and the mist separator 6.

In this example, the opening of the throttle portion, that is, the opening of the throat of the rectangular venturi scrubber 4 is opened so that the backflow of the exhaust gas does not occur due to the fluctuation of the blowing pressure of the exhaust gas. It is formed adjustable by moving the lower part of 4'inward or outward. It is formed so as to be sucked by the suction force of the spray of cleaning water ejected from the cleaning water nozzle 8 for exhaust cleaning introduced into the exhaust introduction pipe of the venturi scrubber 4. The opening 10 of the enlarged portion 9 of the venturi scrubber 4 is provided so as to face the cleaning water tank portion 7 of the dust collection chamber 2.

The overflow weir 1 is provided on one side of the wash water tank 7.
1 is provided, and a refining tank 12 is provided outside the overflow weir 11.
And a liter conveyor unit 13 is provided in the refining tank 12. Both side walls 14 of the liter conveyor section 13 are formed at the same height as the overflow weir 12. In this example, the bottom side wall of the wash water tank portion 7 is formed at 60 °, and the bottom portion 15 is provided with a sludge conveyor 16.

A mist separating plate 5 is provided on the side of the dust collecting chamber 2.
The longitudinal direction is arranged in the vertical direction, and the exhaust containing the mist hits the mist separating plate 5, and the mist adheres to the mist separating plate 5 and is separated from the exhaust. The mist separated by the mist separation plate 5 becomes drops and becomes mist separation plate 5.
To the wash water tank 7. In this example, the mist separation plate 5 is vertically installed. However, when the mist separation plate 5 is inclined and installed, the larger the gradient of the mist separation plate 5, the higher the wind speed passing through the inside of the mist separator 6. Is preferable because it can be improved. In this example, by arranging the mist separation plate 5 vertically, the flow velocity of the exhaust gas flowing through the mist separator 6 can be increased to 6 m / sec.

In this example, the overflow weir 16 of the wash water tank section 7
Is provided on the drainage outflow side, the clarification tank 12 is provided outside the overflow weir 16, and the liter conveyor section 13 provided with the perforated plate 17 is provided. Large dust floating in the washing water tank section 7 flows into the refining tank 12 together with the supernatant liquid over the overflow weir 16, flows into the liter conveyor section 13, and is separated by the perforated plate 17 of the liter conveyor section 13. To be done.

In the present example, the perforated plate 17 of the liter conveyor section 13 has an opening of 1.0 mm and is scraped off to scrape and carry out the dust separated and left on the perforated plate 17. A conveyor 19 with a tool 18 is provided, and the scraping tool 18 moves together with the conveyor 19 of the liter conveyor section 13. The waste water from the dust collection chamber 2, the venturi scrubber 4, and the mist separator 6 enters the cleaning water tank unit 7, and the dust is separated by sedimentation. The dust floating in the supernatant of the cleaning water tank unit 7 passes over the weir 11 and is separated into dust of 1.0 mm or more by the perforated plate 17 of the liter conveyor unit 13, so that the clarification tank 12 of the cleaning water tank unit 7 is separated. It is scraped out from the liter conveyor section 13 by driving the conveyor 19.

The tip of the liter conveyor unit 13 is provided so as to extend above a bulky dust collecting unit (not shown), and dust of 1.0 mm or more separated and scraped by the liter conveyor unit 13 is Accumulate in the bulky garbage collection section. In this example, for example, a groove (not shown) is formed in the bulky dust collecting portion, and a drain pipe (not shown) connected to the cleaning water tank portion 7 is connected to the groove, The wastewater flowing out from the bulky refuse is returned to the cleaning water tank unit 7 for purification.

A sludge conveyor section 16 is provided on the bottom section 15 of the wash water tank section 7, and the sludge conveyor section 1
The discharge port 6 is located on a sludge treatment tank (not shown). Therefore, the sludge formed by the fine dust settled in the wash water tank unit 7 is accumulated on the sludge conveyor unit 16 and is sent from the wash water tank unit 7 to the sludge treatment tank by driving the conveyor of the sludge conveyor unit 16. Etc. are processed. The suction pipe 21 of the wash water feed pump 20 is connected to the bottom of the clarification tank 12, and the clarified wash water sucked by the wash water feed pump 18 is passed through the feed pipe 22 to the Venturi scrubber 4. And sent to the washing water nozzle 8 of.

Since this embodiment is configured as described above,
When all the facilities of the co-drying and preparation facility (not shown) are operated, the ventilation pressure of the exhaust gas is the maximum, so that the throttle opening of the exhaust gas introducing unit 2 has the maximum opening area. And the suction force of the cleaning water 8 is sucked into the dust collector 1. Further, when some facilities of the joint drying preparation facility (not shown) are not operated, the blowing pressure of the exhaust gas decreases, so that the opening area of the opening of the throttle part of the exhaust gas introducing part 2 becomes small. Then, the cleaning water 8 is sucked into the dust collector 1 by the suction force of the spray.

In the present example, the exhaust water from the joint drying preparation facility introduced from the exhaust gas introduction section 2 by the injection of the wash water is injected with the wash water, and the dust in the exhaust becomes wet and heavy, and the dust collection chamber In 2, the air is separated from the air in the exhaust. Dust collection room 2
Part of the mist formed by spraying in the form of mist or other water droplets is separated along with the dust, but the mist that remains in the air without being separated is the mist together with the air from which the dust is separated. It enters into the separator 6 and hits the mist separating plate 5 there, and is aggregated on the surface of each mist separating plate 5 to be separated and removed. The air that has been cleaned by removing dust and mist flows out from the mist separator 6 to the outside.

The dust in the exhaust gas separated by the cleaning water in the dust collecting chamber 2 and the mist separator 6 is separated in the cleaning water tank section 7. The waste water overflowing from the overflow weir 11 of the wash water tank section 7 flows out onto the liter conveyor section 13. The waste water flowing out to the liter conveyor unit 13 contains coarse dust such as 1.0 mm or more of light straw dust. These bulky wastes are removed by the perforated plate 17. The fine dust in the waste water that has entered the cleaning water tank 7 is stored in the cleaning water tank 7 in the sludge conveyor 1.
Since it settles and deposits on the sludge 6, the sludge conveyor 16 is driven every predetermined time to supply the sludge into the treatment tank (not shown).

In the embodiment shown in FIG. 3, the mist separating plate 5 is provided so that its longitudinal angle is inclined inwardly at an angle of 80 ° from the horizontal plane, and the inclination of the bottom wall of the washing water tank part 7 is 45 °. It is formed at an angle of °. Also in this example, the exhaust from the joint drying and preparation facility introduced from the exhaust introduction unit 2 is sprayed with cleaning water, and the dust in the exhaust is separated from the air in the exhaust in the dust collection chamber 2. In the dust collection chamber 2, a part of the mist-like mist is separated together with the dust, but the mist remaining in the air without being separated enters the mist separator 6 together with the air from which the dust is separated, They are aggregated on the surface of each mist separation plate 5 and separated and removed. The clean air flows out of the mist separator 6 to the outside.

The dust in the exhaust gas separated by the cleaning water in the dust collecting chamber 2 and the mist separator 6 is separated in the cleaning water tank section 7. The waste water overflowing from the overflow weir 11 of the washing water tank portion 7 contains coarse dust such as light straw dust of 1.0 mm or more.
To be removed. Since the fine dust in the waste water that has entered the cleaning water tank 7 is settled and separated on the sludge conveyor 16 in the cleaning water tank 7, and accumulates on the bottom portion 15 of the cleaning water tank unit 7,
The sludge conveyor 16 is driven every predetermined time to discharge the sludge to the sludge treatment tank.

[0033]

According to the present invention, in the present invention,
A dust collection chamber is provided above the opening of the cleaning water tank, a venturi scrubber for introducing exhaust gas is provided downward on the ceiling of the dust collection chamber, and a mist separation unit is provided on at least a part of the side wall of the dust collection chamber. A washing water tank is formed below the dust chamber, and a venturi scrubber is used to inject a dust-containing air stream mixed with mist from above toward the water surface in the water tank to bring the dust and mist in the exhaust into contact with the water surface. The exhaust gas from which dust and a part of mist are separated is brought into contact with a mist separation plate which is vertically or inclined to separate the dust and mist from the exhaust gas. Compared to a dust device, less bubbles are generated and dust can be collected efficiently.

Further, in the present invention, a mist separating plate is provided at the exhaust outlet at a vertical angle of 60 °, preferably at a vertical angle of 60 ° so that the exhaust gas collected is discharged from the exhaust outlet on the side of the dust collecting chamber. Since it is erected at an angle of 80 °, more preferably at an angle of vertical to 85 °, the wind speed passing through the mist separating section can be set to 6 m / sec, which significantly increases the processing capacity of the dust collector. Therefore, the dust collector can be downsized.

In the present invention, a sludge conveyor is provided at the bottom of the drain outlet of the wash water tank, an overflow weir is provided at the drain outlet of the wash water tank, and a water surface is provided outside the overflow weir. Since a liter conveyor device is installed below,
Large dust that floats lightly and heavy sludge can be taken out separately, and it is possible to prevent generation of bubbles in the liter conveyor device.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a wet dust collector according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of a wet dust collecting apparatus of the embodiment shown in FIG.

FIG. 3 is a schematic side view of a wet dust collector according to another embodiment of the present invention.

[Explanation of symbols]

1 Exhaust Wet Dust Collector 2 Dust Chamber 3 Ceiling of Dust Chamber 2 4 Venturi Scrubber 4'Venturi Scrubber 4 Movable Upper Side Wall 5 Mist Separator 6 Mist Separator 7 Wash Water Tank 8 Wash Water Nozzle 9 Expanded part of the Venturi scrubber 4 10 Opening part of the expanded part 9 of the Venturi scrubber 11 Overflow weir 12 Clarifying tank 13 Litter conveyor part 14 First wash water delivery pump of the litter conveyor part 15 Bottom part of the wash water tank part 16 Slurry Azalea conveyor 17 Perforated plate of liter conveyor 13 18 Scraping tool 19 Conveyor 20 Wash water delivery pump 21 Suction pipe of wash water delivery pump 22 Wash water delivery pump to Venturi scrubber 4
Feed pipe for feeding wash water to the wash water nozzle of

Claims (4)

[Claims] 1. In a wet dust collecting method of exhaust gas, in which dust in exhaust gas is brought into contact with water droplets and separated, a dust-containing air stream in which water droplets are mixed is jetted from above toward the water surface in a water tank, and dust in exhaust gas is discharged. And water droplets are brought into contact with the water surface to separate them, and then the exhaust gas from which dust and a part of the water droplets have been separated is brought into contact with a mist separation plate which is provided with its longitudinal direction being vertical or inclined to remove A wet dust collecting method for exhaust gas, comprising separating dust and water droplets. 2. A wet dust collector for exhaust of a grain processing apparatus, comprising: an exhaust introduction section communicating with the exhaust port of the grain processing apparatus in the wet dust collecting chamber, wherein the dust collecting chamber is provided above the opening of the cleaning water tank. A venturi scrubber for introduction is provided downward on the ceiling part of the dust collection chamber, and a mist separation part is provided on at least a part of the side wall part of the dust collection chamber for exhausting grain processing equipment. Wet dust collector. 3. A wet dust collector for exhaust of a grain processing device, comprising: an exhaust gas introduction part communicating with an exhaust port of the grain processing device in the wet dust collecting chamber, wherein a side wall part of the dust collecting chamber has an upper opening of a cleaning water tank. Erected above, at least a part of the side wall of the dust collecting chamber,
An exhaust outlet is formed by vertically or slanting a longitudinal direction of a corrugated plate-shaped mist separator having a chevron cross section, and a venturi communicating with an exhaust outlet of a grain processing apparatus is provided on a ceiling of the dust collection chamber. A wet dust collecting apparatus for exhaust of a grain processing apparatus, which is provided with a scrubber. 4. A wet dust collector for exhaust of a grain processing apparatus, comprising: an exhaust introduction section communicating with an exhaust port of the grain processing apparatus in a wet dust collecting chamber, wherein a side wall portion of the dust collecting chamber has a sludge conveyor at a bottom thereof. A mist separator, which is erected on the upper opening of the washing water tank and has a corrugated plate-shaped cross section at least at a part of the side wall of the dust collecting chamber, is provided with its longitudinal direction vertically or inclined and exhausted. An outlet part is formed, a venturi scrubber communicating with an exhaust port of the grain processing device is provided downward on the ceiling part of the dust collection chamber, and a liter conveyor device is provided at a side part of the cleaning water tank via a weir. A wet dust collecting apparatus for exhaust of a grain processing apparatus, characterized by being provided.