JP2003065676A - Dust collector for grain drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector for grain drier, capable of being constituted so as to be simple and miniaturized even in the case of a wet type, reducing the consumption of water by circulating and using water reserved in a water tank, perfectly separating a dust collecting unit from the water tank, and easily effecting the removing and cleaning work of dust accumulated in the water tank. SOLUTION: The dust collector 1 for a grain drier is constituted of the water tank 2, whose upper surface is opened, and the dust collecting unit 3, disposed on the upper part of the water tank 2. The dust collecting unit 3 is constituted of a water splash producing unit 8 opposed to the opening end of an exhaust introducing tube 5 for downwardly introducing exhaust gas from the grain drier and a mixing unit 10 of the water splash into the exhaust gas, which is formed around the water splash producing unit 8. An exhaust gas passage 11 for the exhaust gas, whose dust is removed, is formed between the water tank 2 and the mixing unit 10 for the dust collecting unit 3. Water is reserved in the water tank 2 so as to retain a predetermined water level. Water is pumped to a fountain nozzle 7 at the central part of upper surface of a disc 6 for the water splash producing unit 8 by an underwater pump 12, arranged in the water tank 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain dryer for use in combination with a grain dryer to separate and collect fine dust in the exhaust gas discharged from the exhaust port of the grain dryer or the dust outlet of the dust collector. The present invention relates to a dust collector for a machine.

[0002]

2. Description of the Related Art In a grain dryer for air-drying grains, the exhaust gas that passes through the dried grain layer and is exhausted from the exhaust port contains straw dust, grain husks, spikelets, mushrooms, mud or dust. It contains a lot of dust. In addition, a grain dryer may be equipped with a dust remover that removes dust that is mixed in the dried grain, but a large amount of dust is also discharged from the dust outlet of this dust remover due to exhaust air. To be done.

Conventionally, in a grain dryer of a general farmer or a grain dryer of a small-scale facility, a duct connected to the exhaust port of the grain dryer is exposed to the outside, and exhaust gas containing dust is directly discharged from the exhaust port. The reality is that they are discharged outdoors.

[0004]

By the way, in recent years, in order to avoid the deterioration of the surrounding environment due to the dust contained in the exhaust gas discharged from the exhaust port of the grain dryer, even in general farmers,
Demand for dust collectors used together with grain dryers is increasing, and various wet or dry dust collectors have been developed.

For example, a conventional wet cyclone type dust collector is used. In this wet cyclone type dust collector, it is constituted by an exhaust swirling section, a cyclone section communicating with the exhaust section, and a wet dust collecting section. Therefore, it requires a considerably large installation space, and labor for removing and cleaning sludge-like dust collected due to the size of the device itself is required. Further, the dry cyclone type dust collector can be easily installed in general farmers and small-scale grain drying facilities because it is simple and can be constructed in a relatively small size, but the removal rate of fine dust is particularly low. Therefore, it has been a problem that the surrounding environment cannot be sufficiently preserved.

Therefore, according to the present invention, the dust collecting portion for separating the dust by introducing the exhaust gas from the grain dryer is unitized to form a dust collecting unit, and the dust collecting unit is combined with the water tank even if it is wet. Simple and compact,
Moreover, by circulating the water stored in the water tank, the amount of water used can be reduced, and the dust collection unit can be completely separated from the water tank so that it can be stored in the water tank and the dust cleaning operation can be easily performed. An object is to provide a dust collector for use.

[0007]

According to a first aspect of the present invention, there is provided a dust collector for a grain dryer which separates dust mixed in exhaust gas discharged from a grain dryer from air. It is a dust collector that collects the air from the dryer by introducing the exhaust air from the dryer downward, which is composed of a water tank with an open top surface and a dust collecting unit placed on the top of this water tank. It is composed of a water splash generation part facing the open end of the exhaust introduction tube and a mixing part of water splash and exhaust formed around it, and dust removal is performed between the water tank and the mixing part of the dust collecting unit. An exhaust passage for the exhaust gas is formed.

According to a second aspect of the present invention, there is provided the dust collector for a grain dryer according to the first aspect, wherein a disk having a diameter larger than the opening end of the exhaust gas introducing cylinder of the dust collecting unit. And a fountain nozzle closely faces the center of the disk to form a water droplet generation unit, and water stored at a lower water level than at least the lower end of the water droplet generation unit in the water tank is stored in the water tank. It is characterized in that the submersible pump arranged in (1) is used to feed the fountain nozzle under pressure.

According to a third aspect of the present invention, in the dust collector for a grain dryer according to the first or second aspect, both the inner surface of the water tank and the portion forming the exhaust passage of the water droplet generating section are cylindrical. Then, the exhaust passages are formed at equal intervals over the entire circumference of the inner surface of the water tank and the portion forming the exhaust passage of the water droplet generating portion.

According to a fourth aspect of the present invention, there is provided a dust collecting apparatus for a grain dryer according to the first aspect, wherein the mixing section of the dust collecting unit is equipped with a water-permeable ventilation filter. It is characterized in that an exhaust port communicating therewith is formed, and that the exhaust port is loaded with a water-permeable ventilation filter.

According to a fifth aspect of the present invention, there is provided a dust collector for a grain dryer according to the first, second, third, or fourth aspect, wherein the upper end of the water tank forms a receiving step over the entire circumference. Is provided with support arms that extend to both sides thereof and do not obstruct ventilation of the exhaust passage, and the support arm of the dust collection unit is locked to the receiving step of the water tank.

[0012]

1 is a vertical sectional front view showing an embodiment of a grain drying dust collecting apparatus according to the present invention, FIG. 2 is a plan view showing the same as above, and FIG. Fig. 4 is an exploded perspective view of the same as above, and Fig. 5 is a front view showing a mode in which the dust collector for a grain dryer according to the present invention is used by being connected to an exhaust port of the grain dryer.

In FIGS. 1 to 4, reference numeral 1 is a dust collector for a grain dryer. The grain dryer dust collecting apparatus 1 is composed of a water tank 2 having an open upper surface, and a dust collecting unit 3 mounted on the upper portion of the water tank 2. The water tank 2 has a cylindrical shape whose diameter is slightly increased upward, and it is preferable that the inner surface is cylindrical even if reinforcing ribs or the like are formed on the outer surface. The upper end of the water tank 2 has a receiving step 4 over the entire circumference.
Is done.

In the dust collecting unit 3, a disc 6 having a diameter larger than the opening end is opposed to the opening end of the exhaust gas introducing cylinder 5 for introducing the exhaust gas from the dryer downward, and the upper surface of the disk 6 is arranged. A fountain nozzle 7 is closely opposed to the central portion to form a water droplet generation unit 8. The periphery of the water droplet generation unit 8 is surrounded by a cylinder 9 whose upper surface is closed and whose lower surface is opened, and a mixing unit 10 of water droplets and exhaust gas is formed around the water droplet generation unit 8. An exhaust passage 11 for exhausted dust is formed between the inner surface of the water tank 2 and the cylinder 9 forming the mixing portion 10.

A submersible pump 12 is arranged in the water tank 2,
The submersible pump 12 and the fountain nozzle 7 are connected by a connecting pipe 13 and a flexible connecting pipe 14, and the flexible connecting pipe 14 is detachable by a connector 15 in the middle thereof. The water is stored in the water tank 2 so as to maintain a predetermined water level A, and the water level A is lower than at least the lower end of the water droplet generation unit 8 when the submersible pump 12 sinks.

The inner surface of the water tank 2 and the exhaust passage 1 of the water splash generator 8
Since the portion 1 is a cylinder 9 and the inner surface of the water tank 2 is also cylindrical, the exhaust passages 11 are equidistant over the entire circumference.

An exhaust port 16 communicating with the outside air is formed on the upper peripheral surface of the mixing section 10 of water splashes and exhaust gas, and the exhaust port 16 is equipped with a water-permeable ventilation filter 17. The ventilation filter 17 can be replaced.

The dust collector 1 for a grain dryer according to the present invention comprises:
As described above, it is composed of the water tank 2 and the dust collecting unit 3, but the dust collecting unit 3 is provided with the support arms 18, 18 which project on both sides thereof and do not obstruct the ventilation of the exhaust passage 11. The supporting arms 18, 18 of the dust collecting unit 3 are configured to be locked to the second receiving step portion 4. That is, the dust collection unit 3 is placed on the upper end of the water tank 2 from above, and the upper end of the exhaust gas introduction tube 5 and the exhaust port 20 of the grain dryer 19 in the embodiment of FIG. 5 are connected by the duct 21.
Further, the fountain nozzle 7 and the submersible pump 12 are connected by a flexible connecting pipe 14 to form the grain dryer dust collector 1.

From the exhaust port 20 of the grain dryer 19 shown in FIG. 5, the exhaust gas that has passed through the grain layer is pumped as exhaust gas to the duct 2
1, the exhaust introduction tube 5 to the dust collector 1 for the grain dryer.
Is introduced into the dust collecting unit 3 as indicated by the white arrow, but in the dust collecting unit 3, the water droplet generation portion 8 is formed by the disc 6 facing the open end of the exhaust introduction cylinder 5. At the center of the upper surface of the disk 6, the water in the water tank 2 is fed by the submersible pump 12 as shown by the arrow.
Since it is jetted vigorously from the exhaust, the exhaust gas and the water droplets are vigorously agitated repeatedly in the mixing section 10 to separate the dust. The separated dust flows down and is stored in the water tank 2 together with water splashes, and the exhaust gas from which the dust has been separated is discharged from the upper end of the water tank 2 through the exhaust passage 11, but a part of the exhaust gas is discharged.
It is discharged from the exhaust port 16 of 0 through the ventilation filter 17. By providing the exhaust port 16 in the mixing unit 10, a part of exhaust gas is exhausted to the outside air from the exhaust port 16,
It is possible to equalize the mixing with water droplets by slowing down the wind speed of the exhaust gas, increasing the mixing time of water and dust, and raising a part of the exhaust air to swirl in the mixing section 10. Therefore, the effect of separating dust due to water splash can be improved.
However, the exhaust port 16 provided with the breathable filter 17 is not an essential requirement.

The water stored in the water tank 2 is repeatedly circulated for use. When the water level drops below a predetermined level due to evaporation or scattering, the water is appropriately replenished. For this purpose, the water tank 2 may be provided with a water supply port (not shown).

The dust accumulated in the water tank 2 is appropriately removed after the work is completed. In the removal operation, if the dust collecting unit 3 is removed from the water tank 2 as shown in FIG.
Cleaning work of the water tank 2 can be easily performed. Further, as described above, the dust collecting unit 3 can be easily attached to the water tank 2 after the cleaning operation of the water tank 2.

In the embodiment shown in FIG. 5, the grain dryer dust collector 1 according to the present invention is used by being connected to the exhaust port 20 of the grain dryer 19, but the grain dryer dust collector 1 according to the present invention is used. Can be used by connecting to the dust outlet of the dust remover 22 attached to the grain dryer 1, or both the exhaust outlet 20 and the dust outlet of the dust remover 22 are connected. Is also possible. Further, the dust collector 1 for grain dryer according to the present invention
Can also be used as it is for dust collection of other grain preparation machines.

[0023]

According to the present invention, the dust collecting part for separating dust by introducing the exhaust air from the grain dryer is unitized to form a dust collecting unit, and it is wet only by combining it with a water tank. Even though it is simple and compact,
Moreover, by circulating the water stored in the water tank, the amount of water used can be reduced, and the dust collection unit can be completely separated from the water tank so that it can be stored in the water tank and the dust cleaning operation can be easily performed. A dust collector for use can be provided.

[Brief description of drawings]

FIG. 1 is a vertical front view showing an embodiment of a grain drying dust collecting apparatus according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view showing the same water tank in a cutaway manner.

FIG. 4 is an exploded perspective view of the same.

FIG. 5 is a front view showing a mode in which the dust collector for a grain dryer according to the present invention is used by being connected to an exhaust port of the grain dryer.

[Explanation of symbols]

1 Dust collector for grain drying 2 aquarium 3 Dust collection unit 4 Receiving step 5 Exhaust gas introduction tube 6 discs 7 fountain nozzle 8 Water splash generator 9 cylinder 10 mixing section 11 exhaust path 12 Submersible pump 13 Connection tube 14 Connection pipe 15 connectors 16 exhaust port 17 Ventilation filter 18, 18 Support arm 19 grain dryer 20 exhaust port 21 duct 22 Dust collector A prescribed water level

Claims (5)

[Claims] 1. A dust collecting apparatus for separating and collecting dust mixed in exhaust gas discharged from a grain dryer, the water tank having an open upper surface, and the dust collecting unit mounted on the upper portion of the water tank. It is configured, the dust collection unit, of the water droplets generation portion facing the open end of the exhaust gas introduction tube for introducing the exhaust gas from the grain dryer downward, the water droplets formed around it and the exhaust gas A dust collector for a grain dryer, characterized in that an exhaust passage for exhausted dust is formed between the water tank and the mixing portion of the dust collecting unit. 2. At the opening end of the exhaust gas introducing cylinder of the dust collecting unit,
A large-diameter disk is made to face the opening end, and a fountain nozzle is made to closely face the center of the disk to form a water droplet generation unit, and a water level lower than at least the lower end of the water droplet generation unit in the water tank. The dust collecting apparatus for a grain dryer according to claim 1, wherein the water stored in the water tank is pumped to the fountain nozzle by an underwater pump arranged in a water tank. 3. The inner surface of the water tank and the portion forming the exhaust passage of the water droplet generating portion are both cylindrical, and the inner surface of the water tank and the portion forming the exhaust passage of the water droplet generating portion are equally spaced all around. The dust collecting device for a grain dryer according to claim 1 or 2, wherein the exhaust passage is formed. 4. An exhaust port communicating with the outside air having a water-permeable ventilation filter is formed in the mixing section of the dust collecting unit,
The dust collector for a grain dryer according to claim 1, 2 or 3, wherein the exhaust port is equipped with a water-permeable ventilation filter. 5. The upper end of the water tank forms a receiving step portion over the entire circumference, and the dust collecting unit is provided with support arms that project to both sides of the dust collecting unit and do not obstruct ventilation of the exhaust passage. The dust collecting device for a grain dryer according to claim 1, wherein the supporting arm of the dust collecting unit is locked.