JPH0810546A - Wet dust collector for exhaust of grain treating device - Google Patents

Abstract

PURPOSE:To prevent a back flow and to improve dust removal efficiency by projecting an exhaust inlet pipe horizontally or downward from one side of a dust collecting chamber, providing an exhaust introducing part and an exhaust sucking part to the projecting pipe and adjusting the cross section of the opening. CONSTITUTION:A dust collecting chamber 2 is formed in the main body 1 of the wet dust collector for an exhaust, and an exhaust inlet pipe 4 is projected from one side 3 into the chamber. The pipe 4 is horizontally set or directed slightly downward, and the upper part is used as an exhaust introducing part 7 and the lower part as an exhaust sucking part 8, the ends 11 and 13 are furnished between the side walls 9, 10, 12 and 14 of the exhaust introducing part 7, the ends 17 and 19 are also provided to the sucking part 8, and further, an injection nozzle 21 is furnished to the side walls 18 and 20. The cross section of the exhaust introducing part 7 is reduced in this way from the open end toward the exhaust sucking part 8, and the cross section of the exhaust sucking part 8 is increased from the exhaust introducing part 7 toward the outlet. Accordingly, the cross section can be adjusted even if the blast pressure of the exhaust from a grain treating device is fluctuated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to receiving, drying, and
Wet dust collector for exhaust of co-drying preparation facility equipped with grain handling facilities such as hulling, preparation and shipping, and grain processing equipment used for handling grains such as receiving, drying, hulling, preparing or shipping grains. Regarding wet type dust collector for exhaust,
In particular, the present invention relates to a wet dust collector for low-pressure exhaust of air containing dust generated in each grain processing facility such as drying of grains and sorting and hulling.

[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 minute dusts are present in a very wide range, the amount of dust is large, and the apparent specific gravity is light on top of it, so it is difficult to remove dust, and a wet dust collector such as a dry dust collector such as a bag filter or a spray tower. Is used.

[0003]

However, although the spray tower has a simple structure, the desired dust removal efficiency cannot be obtained, so that a preliminary dust collecting device is further required and the spray tower can be used for a long period of time. However, there were problems such as clogging and dust accumulation on the surface and increased pressure loss.

However, in such a joint drying and preparation facility, a blower is provided for each facility, and the number of blowers to be operated varies depending on the working condition of each facility, and the dust removing section and the mist separator are provided. Since a backflow occurs when the pressure becomes low with respect to the pressure loss at, a backflow prevention damper is provided. As described above, providing the backflow prevention damper in the spray tower is a problem on the contrary, in addition to increasing the cost of the spray tower, the backflow prevention damper easily causes dust accumulation.

In order to solve such a problem, the inventors of the present invention have provided a dust collecting chamber with a tubular exhaust gas introduction portion having a rectangular cross section and a variable lower end opening area, and a variable opening area of the tubular exhaust gas introduction portion. Similarly, an upper end opening with a variable opening area is connected to the lower end opening, and a tubular exhaust suction section having a generally rectangular cross section is provided. We proposed a wet-type dust collector for exhaust of grain processing equipment such as a co-drying preparation facility equipped with a spray nozzle.
No. 24723). However, since the tubular exhaust gas introducing portion is formed in the dust collecting chamber, the height becomes high and the size becomes large, which is a problem. The present invention is a conventional spray tower,
It is intended to solve the problem of the wet type dust collector for exhaust of grain processing equipment such as a common dry 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 possible to prevent backflow due to pressure fluctuations without installing a backflow prevention damper, to remove even fine dust of several microns, and to adjust the pressure loss in the wet dust collector, and to introduce exhaust gas into a part of the dust collection chamber. Provided is a dual-purpose wet dust collector.

That is, according to the present invention, in a wet dust collecting apparatus for exhaust of a grain processing device, which is provided with an exhaust gas introduction portion communicating with an exhaust port of the grain processing device above the dust collecting chamber, the dust collecting chamber is one of the dust collecting chambers. From the side of the exhaust gas to the inside of the dust collection chamber horizontally or downward at an acute angle in the horizontal direction,
The exhaust gas introducing pipe has an exhaust gas introducing portion and an exhaust gas sucking portion, and the exhaust gas introducing portion is formed such that an opening cross section is reduced from an opening end toward an end portion connected to the exhaust gas sucking portion. The suction part is formed such that the opening cross section is enlarged from the end connected to the exhaust introduction part toward the outflow port, and the water spray nozzle collects the spray port from at least one pair of side walls facing each other. A wet dust collecting apparatus for exhaust of a grain processing apparatus, which is provided toward the room side.

The wet dust collector of the present invention, like the conventional wet dust collector, removes dust generated from a joint drying preparation facility such as grain receiving, hulling, rough selection, drying, preparation and other facilities. Can also be used to
Although it can be used in a dryer or other grain processing apparatus having a large variation in exhaust amount, it is particularly useful as a low pressure exhaust wet dust collector used in communication with exhaust ports of a plurality of grain processing facilities.

In the present invention, in the exhaust type wet dust collector of the grain processing apparatus, the exhaust introduction pipe is formed to extend horizontally or horizontally at an acute angle into the dust collecting chamber. The exhaust gas introducing pipe is provided in the dust collecting chamber horizontally or downwardly with respect to the horizontal direction at an acute angle, preferably 45 ° or less, more preferably 15 to 45 °. Further, the exhaust gas introduction pipe has such a length that the exhaust gas flowing out from the outlet does not directly collide with the wall surface of the facing dust collection chamber, and the dust in the exhaust gas does not adhere to the wall surface of the facing dust collection chamber. It is provided so as to project into the room. In this case, the length of the exhaust introduction pipe protruding into the dust collection chamber is 1/3 or less of the total length of the dust collection chamber, preferably 1/3 to 1/10 of the total length of the dust collection chamber. Exceeding 1/3 of the total length is not preferable because the exhaust gas flowing out from the outlet of the exhaust introduction pipe directly collides with the wall surface of the dust collection chamber that faces it.
It is not preferable because the effect of using a part of the dust collecting chamber as the exhaust gas introducing pipe cannot be obtained. When the dust collection chamber becomes larger, the dust collection chamber becomes larger than the exhaust introduction pipe, so that the ratio of the length of the exhaust introduction pipe protruding into the dust collection chamber becomes smaller. The exhaust gas introducing pipe is generally formed in a substantially rectangular cross section, and includes an exhaust gas introducing portion and an exhaust gas sucking portion. The exhaust gas introduction portion is formed such that the opening cross section is reduced from the opening end toward the end portion connected to the exhaust gas suction portion, that is, the exhaust gas introduction portion is formed to be narrowed forward. However, the exhaust suction portion is formed such that the opening cross section is enlarged from the end portion connected to the exhaust introduction portion toward the outflow port, and the water spray nozzles are respectively provided on at least one pair of opposing side walls. The mouth is provided downward.

In the present invention, the exhaust gas introducing portion is formed in a generally rectangular cross section, and has a pair of opposing side walls,
For example, one or both of the left and right side walls are formed so as to be rotatable around the opening end portion, the position of the exhaust suction portion side end portion can be changed, and the opening area of the exhaust suction portion side end portion can be changed. It is variable. Therefore, in the present invention, when the blowing pressure of the inflowing exhaust gas is lower than a predetermined value, the size of the opening area of the exhaust suction portion side end portion of the exhaust gas introducing portion is reduced,
The exhaust pressure can be increased by moving the exhaust suction side end of at least one of the pair of left and right side walls facing each other, that is, by adjusting the opening of the exhaust suction side end of the exhaust introduction section. it can.

Further, in the present invention, the tubular exhaust suction portion is formed in a generally rectangular cross section, and the pair of opposed side walls, for example, at least one of the left and right side walls, has an exhaust outflow side opening end. It is rotatably provided around the part,
The position of the end portion connected to the exhaust gas introduction portion side is changeable. Therefore, in the present invention, when the blowing pressure of the inflowing exhaust gas is lower than a predetermined value, at least one of the pair of left and right side walls facing each other is configured so that the size of the opening area of the exhaust introduction portion side end portion becomes small. The exhaust pressure can be increased by moving the exhaust-introduction-side end of the side wall, that is, by adjusting the exhaust-introduction-side end opening.

In the present invention, the upper and lower side walls are preferably formed symmetrically, for example, parallel to the center line of the exhaust gas introducing pipe in order not to bias the flow of the exhaust gas through the exhaust gas introducing pipe. The left and right sidewalls are preferably formed symmetrically with respect to the center line of the exhaust gas introducing pipe. In this case, for example,
The opening-side ends of the left and right side walls of the exhaust gas introducing portion are provided so as to be rotatably supported by the opening-side ends of the upper and lower side walls, respectively, and the ends of the left and right side walls can be moved inward. Preferably. In this case, the angle sandwiched by the left and right inclined side walls is determined in relation to the length of the exhaust introduction portion, the size of the outlet opening area, the size of the passing wind speed, and the like.

In the present invention, the left and right inclined side walls of the exhaust gas introduction portion and / or the exhaust gas suction portion are provided for a predetermined time.
Since it is necessary to maintain the inclined posture at a constant angle, a pin is provided on one or both of the moving side ends of the left and right side walls that are rotatably supported, or near the moving side end. Are formed in the upper and lower side walls such that they can move and be fixed to the slots formed in a curved shape, a slightly curved shape, or a linear shape. As the pin fixing means in this case, a commonly used fixing means is applied, for example, a means for tightening and fixing with a nut or a protrusion or a pin formed on the pin by moving the pin in the groove hole. The pin can be fixed to the groove hole by fixing means such as fitting the groove into the recess formed in the bottom of the groove hole.

In the present invention, the angle between the left and right inclined side walls of the exhaust suction portion is defined in relation to the length of the exhaust suction portion and the passing wind speed. For example, when the length of the exhaust introduction part is 500 mm, the length of the exhaust suction part is 1500 mm, and the outlet opening of the exhaust suction part is 400 mm in width and 400 mm in length, the outlet passing wind speed of the exhaust suction part is 10.4 m. / Sec, the angle sandwiched by the left and right sloping side walls of the exhaust introduction part is 20
The angle between the inclined side walls of the exhaust suction portion is preferably 5 to 15 °, and more preferably 5 to 8 °.

In the present invention, the tubular exhaust suction unit is provided with a water jet which is jetted from the spray nozzle provided with the jet port facing the dust collecting chamber side, even when the exhaust gas feeding pressure becomes lower than a predetermined value. Exhaust gas can be positively sucked by the suction action, so that backflow can be prevented even if the provisional blast pressure decreases. Therefore, in the present invention, in order to prevent such a reverse flow of exhaust gas, the decompression, that is, the suction force by the water flow ejected from the spray nozzle is sufficient to surpass the pressure loss in the dust removing portion and the mist separator, for example. Requires.

In the present invention, the spray nozzle supplies water to the dust in the exhaust gas in a spray form to separate the dust from the water, and cleans the exhaust gas into clean air. Further, in the present invention, the spray nozzle functions as an ejector for positively sucking the exhaust gas into the dust collector.

This spray nozzle is provided with the tip of the nozzle facing in a space surrounded by the side wall of the pipe formed so that at least one side wall is enlarged and inclined toward the dust collection chamber side. Therefore, for example, the spray nozzle is provided on each side wall of the boundary between the exhaust introduction portion and the exhaust suction portion, or on each side wall of the exhaust suction portion that expands in a skirt shape, with the injection port facing the dust collection chamber side. It is preferable because it can be sucked uniformly.

In the present invention, the exhaust gas introducing pipe is provided in the dust collecting chamber so as to project horizontally or downward at an acute angle with respect to the horizontal direction. By thus providing the exhaust introducing pipe so as to project into the dust collecting chamber, the height of the exhaust introducing pipe can be reduced. Further, in the present invention, the outflow from the exhaust introduction pipe rises in the dust collection chamber, and during the contact between the mists and the contact between the mist and the dust, the mist collects dust and aggregates the mist. Therefore, the mist can be efficiently separated by the mist separator.

When the air volume of the exhaust gas entering the dust collecting chamber from the exhaust gas introducing pipe is large, the exhaust path is lengthened by, for example, meandering, and the mist and the dust are brought into contact with each other and the mists are brought into contact with each other. Thus, the dust can be collected by the mist and the mist can be aggregated, and the mist can be efficiently separated by the mist separator. As described above, in the present invention, a part of the space of the dust collecting chamber is also used for introducing the exhaust gas and collecting dust, so that the space of the dust collecting device can be effectively used,
The volume of the dust collector can be reduced.

[0020]

In the present invention, the exhaust introduction pipe has the exhaust introduction portion and the exhaust suction portion, and the opening cross section of the exhaust introduction portion is reduced from the opening end toward the end portion connected to the exhaust suction portion. The exhaust suction portion is formed such that the opening cross section is enlarged from the end portion connected to the exhaust introduction portion toward the outlet, and at least one pair of side walls facing each other, respectively.
Since the water spray nozzle is provided with its injection port facing the dust collecting chamber side, even if there is a fluctuation in the air blowing pressure of the exhaust gas from the grain processing device, the opening area of the outlet of the exhaust gas introducing section can be adjusted appropriately. The blow pressure of the exhaust gas can be adjusted, and the exhaust gas can be positively sucked by the jet flow from the spray nozzle. Therefore, according to the present invention, backflow of exhaust gas can be avoided due to pressure fluctuations in the exhaust gas of the grain processing apparatus.

According to the present invention, since the dust collection chamber is provided with the exhaust gas introduction pipe which is provided horizontally from one side of the dust collection chamber or horizontally downward and at an acute angle toward the inside of the dust collection chamber. Disturbance occurs in the dust collection chamber where the exhaust gas introduction pipe of the dust collection device is introduced, and the mist is agglomerated and dust is actively collected, and the mist separator provided in the upper space of the dust collection chamber is collected. Collection efficiency can be improved. The aggregating of mist and the dust collecting action in the dust collecting chamber improve the function of the dust collecting chamber, and the dust collecting chamber can be downsized.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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. 1 is a schematic vertical cross-sectional view of a wet dust collector according to an embodiment of the present invention.
FIG. 2 is a schematic vertical sectional view of an exhaust gas introducing pipe in the wet dust collector of FIG. 1. FIG. 3 is a schematic vertical sectional view showing an embodiment of the present invention different from the embodiment shown in FIG. 1, but the exhaust introduction pipe shown in FIG. 2 is used. FIG. 4 is FIG.
FIG. 6 is a schematic plan view of a mist separator showing an attachment mode of the mist separator in the example shown in FIG. Figure 2
Also, in the embodiment shown in FIG. 3, the portions corresponding to those in FIG. 1 are designated by the same reference numerals.

In the embodiment shown in FIGS. 1 and 2,
The dust collecting apparatus main body 1 for wet exhaust has a dust collecting chamber 2 formed therein. On one side 3 of the dust collection chamber 2, an exhaust gas introduction pipe 4 is formed so as to protrude inside. An exhaust outlet 6 including a mist separator 5 is formed above the dust collection chamber 2. The exhaust introduction pipe 4 is approximately 20 ° with respect to the horizontal direction.
At the angle of, and protrudes downward into the dust collection chamber 2, the upper part is the exhaust gas introduction part 7, and the lower part is the exhaust gas suction part 8.

In the present example, the exhaust gas introducing portion 7 has an upper side wall 9 and a lower side wall 10, and is provided between both end portions of the upper and lower side walls with an end portion 11 movable inward. A side wall 12 on the front side shown in FIG. 1 and, similarly, between both side ends of the upper and lower side walls, an end portion 13 is provided so as to be movable inward, and is provided on the far side shown in FIG. It has a side wall 14.

In the present embodiment, the exhaust suction unit 8 has an upper side wall 15 and a lower side wall 16, and is provided between both ends of the upper and lower side walls with an end 17 movable inward. 1, the side wall 18 on the front side shown in FIG. 1, and, similarly, between both side ends of the upper and lower side walls, an end 19 is provided so as to be movable inward, and the other side shown in FIG. Side walls 20 of each side wall 18 and 2
0 toward the dust collection chamber 2 and three injection nozzles 21
It has.

As shown in FIG. 2, in this embodiment, the side walls 12 and 14 of the exhaust introduction portion 7 which face each other have their ends 11 and 13 inclined inwardly toward the dust collection chamber 2 to be in a posture 22. And 23 (indicated by the dashed line),
When the exhaust blowing pressure decreases, the postures 24 and 25 (shown by the solid line) are inclined further inward.

In this example, the side walls 17 and 20 of the exhaust suction portion 8 which face each other are formed in a posture (indicated by a chain line) that is inclined outward toward the dust collection chamber 2.
Postures 24 and 25 (indicated by the solid line) that are inclined inward at a larger angle when the exhaust blow pressure decreases
Formed. An injection nozzle 21 is provided downward on each of the side wall portions 18 and 20.

The opposite side walls 12 and 14 of the exhaust gas introducing portion 6 are both inclined 22 toward the dust collecting chamber 2 inwardly.
And 23, but is fixed in a posture (indicated by a solid line and the same as reference numerals 12 and 14) inclined further inward when the blowing pressure of the exhaust gas decreases. For this fixing, embedded bolts 26 (the portions hidden by the side wall portions 12 and 14 are also shown by solid lines for convenience of explanation) provided at the end portions of the side wall portions 12 and 14 of the exhaust gas introducing portion 7 are attached to this side portion. An elongated slot 27 for inserting a buried bolt formed in the other pair of lower side walls 10 provided in the direction orthogonal to the side walls 12 and 14, respectively (the portion hidden by the side side walls 12 and 14 is also for convenience of description). (Shown in solid lines) respectively and by tightening nuts (not shown). The movement of the side sidewalls 12 and 14 between the postures shown by the solid line and the postures 22 and 23 shown by the alternate long and short dash line is caused by moving the side wall 12 around the shaft 28 provided at the upper portion of the lower side wall 10. And 14 are rotated.

Opposing side walls 18 and 20 of the exhaust suction portion 8 are provided in postures 24 and 25 that are inclined outward toward the dust collection chamber 2, but further dust collection is performed when the blowing pressure of the exhaust gas decreases. It is fixed in a position inclined outwards towards the chamber 2 (shown in solid lines, same as 18 and 20). For this fixing, embedded bolts 29 (the portions hidden by the side wall portions 17 and 20 are also shown by solid lines for convenience of explanation) provided at the ends of the side wall portions 18 and 20 of the exhaust suction portion 8 are attached to the side wall portions. Elongated slots 30 formed in the other pair of lower side walls 10 provided in the direction orthogonal to 18 and 20 (the portion hidden by the side side walls 18 and 20 are also shown by solid lines for convenience of description). And then tighten the nut (not shown). This side wall 1
The movement between the postures 8 and 20 indicated by the solid line and the postures 24 and 25 indicated by the alternate long and short dash line is performed by rotating the side wall 18 around the shaft 31 provided on the dust collection chamber 2 side of the lower side wall 10.
And by rotating 20.

In this example, a gap 32 is formed between the exhaust introduction part 7 and the exhaust suction part 8, and the injection nozzle 21
Are provided in this gap 32. However, the injection nozzle 21 may be provided in the side wall portions 18 and 20 of the exhaust suction portion 8 with the injection port facing the dust collection chamber 2 side. The injection nozzle 21 is connected to the cleaning water tank 33 through an opening / closing valve 34 and a liquid feed pump (not shown), and a pipe line 35.
Connected to When the cleaning water is sprayed from the spray nozzle 21, the liquid feed pump is driven. The water sprayed by the spray nozzle flows into the wash water tank 33 to separate the precipitates such as dust and circulate them.

Since this example is constructed as described above, when all facilities of the joint drying and preparation facility (not shown) are operated, the blast pressure of the exhaust gas is the maximum, so the exhaust gas is the maximum. The side wall portions 12 and 14 of the introduction portion 7 and the side wall portions 18 and 20 of the exhaust suction portion 8 have the largest opening area of the outlet opening 36 of the exhaust introduction portion 7 and the inlet opening 37 of the exhaust suction portion 8. , The side walls 12 and 14 to the posture 22
And 23, the side walls 18 and 20 are fixed to the positions of 24 and 25, and the wash water is atomized from the injection nozzle 21 of the exhaust suction unit 8 with an injection amount sufficient to remove dust. Is jetted.

Exhaust gas from the co-drying preparation facility introduced through the exhaust gas inlet 38 passes through the exhaust gas inlet portion 7 and reaches the exhaust gas suction portion 8 where the cleaning water is injected. The dust that has been sprayed with the cleaning water and becomes wet becomes heavy and separated from the air in the exhaust, but the mist atomized in a mist moves with the separated air and directly collects dust from the exhaust outlet 39. The mist introduced into the chamber 2 and partly aggregated and separated in the dust collection chamber 2 is separated and removed by the mist separator 5. The exhaust gas from which dust and mist have been separated flows out from the exhaust outlet 6.

When some facilities of the co-drying preparation facility (not shown) are not operated, the blast pressure of the exhaust gas is lowered, so that the side wall walls 12 and 14 of the exhaust gas introducing pipe part 7 are reduced.
Is fixed to the positions of postures 12 and 14 shown by solid lines, for example, so that the opening area of the outlet opening 36 of the exhaust introduction portion 7 is narrowed and the exhaust blowing pressure is adjusted.
Further, from the injection nozzle 21 of the exhaust suction unit 8, a water stream is sprayed in a mist with an injection amount that can positively suck the exhaust in addition to removing the dust for collecting dust. Due to the injection of this water flow, the exhaust gas from the joint drying and preparation facility introduced from the exhaust gas introduction port 38 passes through the exhaust gas introduction unit 7 and the outlet opening 36.
Enters the inlet opening 37 of the exhaust suction unit 8.

When the exhaust gas is introduced from the inlet opening end of the exhaust suction portion 8, the cleaning water is sprayed. The dust that has been sprayed with the cleaning water and becomes wet becomes heavy and separated from the air in the exhaust, but the mist atomized in a mist moves with the separated air and directly collects dust from the exhaust outlet 39. The mist introduced into the chamber 2 and partly aggregated and separated in the dust collection chamber 2 is separated and removed by the mist separator 5. The exhaust gas from which dust and mist have been separated flows out from the exhaust outlet 6.

In the present embodiment, the outlet opening 36 of the exhaust gas introducing portion 7 is narrowed from the exhaust gas introducing opening 38 by the side walls 12 and 14 of the exhaust gas introducing portion 7 which face each other. The exhaust gas thus sucked is made to flow through the narrowed passage and compressed by the suction action of the exhaust suction portion 8. Also,
The inlet opening 37 of the exhaust suction unit 8 is also the outlet opening 3 of the exhaust introduction unit.
6 is narrowed similarly to 6, and the inlet opening 3 of the exhaust suction unit 8
Cleaning water can be efficiently injected into the exhaust gas passing through 7.

In the present embodiment, the side walls of the exhaust introduction part 7 and the exhaust suction part 8 are formed so that the outlet openings 36 of the exhaust introduction part 7 and the exhaust suction part 8 are formed together so that a narrowed exhaust passage can be formed. Although the outlet opening 37 is formed movably, only the outlet opening 36 of the exhaust gas introducing portion 7 can be made movable.
Even in this case, the exhaust gas passing through the exhaust gas introduction portion 7 is compressed by the suction action of the exhaust gas suction portion 8 through the narrowed passage of the exhaust gas introduction portion 7.

In this embodiment, the mist separator 5 and the exhaust outlet 6 are provided directly above the dust collecting chamber 2. However, for example, the amount of air passing through the dust introducing chamber 4 from the exhaust introducing pipe 4 is 5 m / sec. When it is relatively large, it is preferable that a partition is provided between the exhaust introduction pipe 4 and the mist separator 5 and the exhaust path is formed, for example, in a meandering manner to reach the mist separator 5 and lengthened.

The embodiment shown in FIG. 3 is an example of a dust collector suitable for a passing air volume of 5 m / sec or more. In the present example, the dust collecting apparatus 1 for wet exhaust has a dust collecting chamber 2 formed therein, and the dust collecting chamber 2 is provided with a partition wall 40 partially covering the upper portion thereof. The space not covered with is the exhaust outlet 41 of the dust collection chamber 2. The space between the partition wall 40 from the exhaust outlet 41 and the ceiling wall 42 of the dust collection chamber 2 is an exhaust passage 43, and the mist separator 5 is provided by blocking the exhaust passage 43.

The dust collection chamber 2 is provided with an exhaust introduction pipe 4 consisting of an exhaust introduction part 7 and an exhaust suction part 8 on one side 3 thereof, that is, on the opposite side of the exhaust outlet part 41. Further, the partition wall 40 leads to the city wall. The ceiling wall 42 on the other side of the dust collection chamber 2 is provided with an exhaust outlet 41, and the mist separator 5 is provided in an exhaust passage 43 from the exhaust outlet 41.

In this example, the exhaust gas introducing pipe has the structure shown in FIG. Therefore, the side sidewalls 12 and 14 of the exhaust introduction portion 7 are fixed to the inwardly inclined postures 22 and 23 (shown by the solid line) when the blow pressure of the exhaust gas decreases. In the present example, the side walls 18 and 20 of the exhaust suction portion 8 which face each other are formed in a posture inclining outward toward the dust collecting chamber 2 and the dust collecting chamber 2 respectively.
The injection nozzle 21 is provided toward the side. In this example, the mist separator 5 provided in the exhaust passage 43
Is a gutter-shaped plate 44 having two V-shaped recesses, which is screwed to a threaded portion 46 of a mounting column 45 with a nut 47, and is provided between the plurality of gutter-shaped plates 44. Child 4
8 are arranged so that the space between the gutter-shaped plates 44 is constant (FIG. 4). In this example, the mist separator 5 is
In the exhaust passage 43, gutter-shaped stainless steel plates are vertically inclined at intervals of, for example, 30 to 100 mm, preferably 50 to 80 mm.

Since this example is constructed as described above, when all the facilities of the joint drying preparation facility (not shown) are operated, the blast pressure of the exhaust gas is the maximum, so the exhaust gas is the maximum. The postures of the side sidewalls 12, 14, 18, and 20 are adjusted so that the opening areas of the outlet opening 36 of the exhaust introduction portion 7 of the introduction pipe 4 and the inlet opening 37 of the exhaust suction portion 8 are maximized. From the injection nozzle 21 of the exhaust suction unit 8, the cleaning water is sprayed in a mist form with an injection amount sufficient to remove dust.

In the exhaust suction portion 8, the dust wetted by the washing water becomes heavy and separated from the air in the exhaust,
On the other hand, the mist sprayed in the form of mist directly flows into the dust collection chamber 2 together with the separated air, enters the mist separator 5 formed of a stainless steel gutter-shaped plate from the exhaust outlet 41, The mist is separated and removed and flows out from the exhaust outlet 6. In the above example, the mist separator is
A stainless steel net or a stainless steel gutter-shaped plate is used, but in addition to this, it may be in the form of a commonly used mist separator such as a stainless two-stage inclined plate type, corrugated, teardrop type. it can. In this example, a stainless mist separator is used, but as the mist separator used in this example, there are plastic and steel plate-made ones other than stainless steel-made mist separators.

[0043]

According to the present invention, the dust collecting chamber is provided with the exhaust gas introducing pipe which is horizontally projected from one side of the dust collecting chamber or is projected downward in the horizontal direction at an acute angle to the inside of the dust collecting chamber. So
The dust collection chamber of the dust collector serves as both exhaust gas introduction and dust collection, a horizontal flow is formed in the dust collection chamber, and the mist is collected and collected by changing the direction of the exhaust gas due to rising exhaust gas. You can In addition, a shielding plate is provided according to the air volume,
The passage of the exhaust gas in the upper space of the dust collection chamber can be adjusted, and the collection efficiency of the mist separator can be improved.
The aggregating of mist and the dust collecting action in the dust collecting chamber improve the function of the dust collecting chamber, and the dust collecting chamber can be downsized.

According to the present invention, the exhaust gas introducing pipe, which is provided so as to project horizontally or at an acute angle into the dust collecting chamber, appropriately adjusts the openings of the exhaust gas introducing portion and the exhaust gas intake portion in accordance with the flow rate of the exhaust gas. Since it can be smoothly introduced directly into the dust collecting chamber, the opening area of the exhaust introduction unit and / or the exhaust suction unit can be adjusted appropriately even if the blowing pressure of the exhaust gas from the grain processing device fluctuates. , The exhaust air blow pressure can be adjusted. Therefore, it is possible to stretch the dust collection chamber to the optimum exhaust air volume.

Further, in the present invention, the exhaust gas can be positively sucked by the jet flow from the spray nozzle provided in the exhaust gas introduction pipe. Therefore, according to the present invention, backflow of exhaust gas can be avoided due to pressure fluctuations in the exhaust gas of the grain processing apparatus. Further, the present invention does not require a backflow prevention damper for exhaust pressure fluctuations, which is required in the exhaust type wet dust collector of a grain processing apparatus such as a conventional co-drying and preparation facility, so that it can be compared with a conventional dust collector. Then, the cost is reduced correspondingly, it is economical, the structure is simple, dust accumulation can be avoided, and the operation can be performed for a longer period of time.

[Brief description of drawings]

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

FIG. 2 is a schematic vertical sectional view of an exhaust gas introducing pipe in the wet dust collector of FIG.

3 is a schematic vertical cross-sectional view showing another embodiment of the present invention different from the embodiment shown in FIG.

FIG. 4 is a schematic plan view of a mist separator showing a mounting mode of the mist separator in the embodiment shown in FIG.

[Explanation of symbols]

1 Dust collector main body 2 Dust collection chamber 3 One side of the dust collection chamber 2 4 Exhaust introduction pipe 5 Mist separator 6 Exhaust outlet section 7 Exhaust introduction section 8 Exhaust suction section 9 Upper side wall of exhaust introduction section 7 Exhaust introduction section 7 Lower side wall 11, 13 End portion of side wall of exhaust introduction section 12, 14 Side wall 15 Upper side wall of exhaust suction section 16 Lower side wall of exhaust suction section 17, 19 Side wall of exhaust suction section 8 End portions 18 and 20 side wall of exhaust suction portion 8 21 injection nozzles 22 and 23 posture of side wall of exhaust introduction portion 24 and 25 posture of side wall of exhaust suction portion 26 fixed side wall of exhaust introduction portion Embedded bolts 27, 30 Slots on the lower side wall 28, 31 Shafts provided on the lower side wall 29 Embedded bolts for fixing the side sidewalls 18 and 20 of the exhaust suction portion 32 Exhaust introduction portion 7 and exhaust suction portion Gap between 8 3 Cleaning water tank 34 Open / close valve 35 Piping path 36 Outlet opening of exhaust gas introduction section 37 Inlet opening of exhaust gas suction section 38 Exhaust gas introduction port of exhaust gas introduction tube 39 Exhaust gas outlet port of exhaust gas introduction tube 40 Partition wall 41 Dust collection chamber 2 Exhaust outlet 42 of the dust collecting chamber 2 ceiling 43 exhaust passage 44 gutter-shaped plate 45 mounting column 46 screw part 47 nut 48 spacer

Claims (3)

[Claims] 1. In a wet dust collector for exhaust of a grain processing device, which comprises an exhaust gas introducing portion communicating with an exhaust port of the grain processing device above the dust collecting chamber, the dust collecting chamber is horizontal from one side of the dust collecting chamber. The exhaust introduction pipe provided so as to project toward the interior of the dust collection chamber toward the bottom or at an acute downward angle in the horizontal direction, and the exhaust introduction pipe has an exhaust introduction part and an exhaust suction part. The section is formed by reducing the opening cross section from the opening end toward the end connecting to the exhaust suction section, and the exhaust suction section expands the opening cross section from the end connecting to the exhaust introduction section toward the outflow port. And a pair of side walls opposed to each other, each of which is provided with a water spray nozzle with its spray port facing the dust collecting chamber side. Dust equipment. 2. The exhaust gas introduction portion is formed in a generally rectangular cross section, and a pair of opposing side walls are fixed at their open ends so as to be rotatable, and end portions connected to the exhaust gas suction portion. The wet type dust collecting apparatus for exhaust of the grain processing apparatus according to claim 1, wherein the position is changed. 3. The exhaust suction part is formed in a generally rectangular cross section, and the pair of side walls facing each other are rotatably fixed at the exhaust outflow side opening end and connected to the exhaust introduction part. The exhaust type wet dust collecting apparatus of the grain processing apparatus according to claim 1 or 2, wherein the position of the end portion is changed.