JPS6116270Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hopper for preventing the generation of dust during cargo handling operations. The hopper according to the present invention can be applied to various types of dust generation prevention device loading and unloading operations, but it can be particularly effectively applied to storing flaky sulfur and transferring it directly to the loading platform of a truck, etc. .

Conventionally, when the flaky sulfur accumulated in the hopper was shipped from the hopper to the truck, there was a drop of more than 1 meter from the hopper gate to the truck loading platform, so the impact caused by the sulfur falling on the way down or onto the loading platform. As a result, extremely large amounts of dust were generated and scattered in all directions, making it impossible to approach the work site without wearing dust-proof goggles and a mask, posing a serious occupational health problem.
As a method for preventing the generation of such dust, there is a suction method using a blower, which has been researched in steel works, etc., and this blower suction method is also used to prevent the generation of flaky sulfur dust as described above. There is. The blower suction method is a method in which the generated dust is sucked in by a blower, separated and collected using a bag filter, etc., and is mainly used to prevent the generation of flaky sulfur dust by using sealed conveyors, bucket elevators, etc. It is used as a dust countermeasure in structures, and even if a hood is installed especially in areas open to the atmosphere such as shipping ports, there is a limit to the dust suction ability of the blower, so it is expected to effectively prevent dust generation. It is no exaggeration to say that there is currently no solution to preventing dust at the shipping port. Furthermore, the conventional blower suction method naturally requires the installation of a suction duct, a blower, a bag filter, etc., which results in extremely high installation costs, requires dust collection work, and has problems such as extremely complicated operation. have

In addition to the above-mentioned prevention of dust generation, when working with powder, it is also required to prevent dust explosions and fires within the casing. For this purpose, nitrogen (N ₂ ) gas is blown into the conveyor casing.
It was necessary to control the oxygen (O ₂ )% to below the limit of dust explosion. More specifically, there is a risk of dust explosion in facilities for producing, storing, and shipping flake sulfur, and to prevent this, it is necessary to blow inert gas and control O ₂ % below the explosion limit. However, the conventional blower suction method has the drawback that the inert gas is sucked by the blower, which requires a huge amount of inert gas and extremely high operating costs.

Therefore, the main purpose of the present invention is to improve the conventional hopper so that even if dust-generating substances are allowed to fall from the hopper gate to other places, the hopper can be operated with extremely little or no dust generation. It is an object of the present invention to provide a hopper that can prevent dust generation.

The object of the present invention is to provide a dust generation prevention hopper that can prevent dust generation while preventing dust explosions, and can store and transport dust generating substances, such as flaked sulfur, to other locations. .

The object of the present invention is to provide a dust generation prevention hopper that can prevent dust generation while preventing dust explosions by using an extremely small amount of inert gas for dust explosion prevention.

Another object of the present invention is to provide a dust prevention hopper that is easy to operate and inexpensive to install.

The above objects are achieved by providing a dust generation prevention device connected to the hopper gate, bringing steam into contact with the dust of the material falling from the hopper gate, and then shipping the material from the hopper. This is achieved by means of a prevention hopper. When the material is flake sulfur, the sulfur and steam are brought into contact, and according to the method, blowing the steam into a given equipment increases the humidity in the equipment and also reduces the O ₂ % in the equipment. This has the effect of suppressing the generation of dust itself and eliminating the possibility of dust explosion.
Additionally, the humidifying effect of steam also has an anti-static effect, contributing to improved safety. Furthermore, the humidifying effect of steam does not increase the moisture content of the product.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The dust generation prevention hopper according to the present invention will be explained with reference to drawings showing embodiments thereof.

Referring to FIG. 1, the dust generation prevention hopper 1 according to the present invention includes a storage main body container 2 for storing a material, for example, a dust generating substance M such as flaky sulfur, and an integrated storage main body container 2. It is composed of a connected dust generation prevention device 4. The storage body container 2 may be substantially the same as a conventional hopper, with a hopper gate 6 at the lower end of the container 2.
have. Therefore, by operating the hopper gate 6, the material M in the main container 2 is caused to fall into the dust generation prevention device 4.

The dust generation prevention device 4 includes a casing 10 whose upper end is integrally connected to the main body container 2 and has a shipping port 8 at its lower end. A first blocking plate 12 is provided inside the casing 10 to receive the material M that has fallen from the hopper gate 6. Since the first barrier board 12 is arranged to be inclined downward, the material M that has fallen onto the first barrier board 12 is the material that has slipped down from the first barrier board 12. a second barrier board 1 inclined in the opposite direction to the first barrier board 12 so as to receive the
4 Reach the top. Furthermore, a third wall board 16 is provided which is inclined in the opposite direction to the second wall board 14 to receive the material M from the second wall board 14.
The third barrier plate 16 directs the material on the third barrier plate 16 to the shipping port 8 of the casing 10.
The material M discharged from the third barrier board 16 to the shipping port 8 is transferred to an outlet plate provided between the third barrier board 16 and the shipping port 8 before being discharged from the shipping port 18. 18 and 20. The outlet plates 18 and 20 are preferably rubber plates which abut each other and are held closed when sulfur is not on the outlet plates, but sulfur falls onto the outlet plates 18 and 20. When the rubber plate is pushed, the rubber plate is bent due to the weight of the sulfur, and the material M is configured to fall into the shipping port 8.

In the dust generation prevention device 1, spray nozzles 30; 31,
32, 33, and 34 are arranged so as to face the first, second, and third wall plates 12; 14 and 16. Any size, shape, and number of spray nozzles can be used as desired, and the arrangement thereof can be varied in various ways. In the embodiment illustrated in the drawings, steam is sprayed onto the material M by the spray nozzle 35 even in the process from the third barrier plate 16 to the shipping port 8 along the inclined bottom wall 10' of the casing 10. It is configured to obtain.

Furthermore, if we specifically explain the above structure,
1st, 2nd and 3rd mountain boards 12, 14 and 16
is preferably a stainless steel plate (e.g. SUS304)
parts where sulfur may get on,
That is, the angle α of the cutting board, casing and outlet board
Since the angle of repose of sulfur is thought to be 35 to 45°,
It is preferable that all angles be 45° or more. This angle is not critical and can vary depending on the type of material being handled. The spray nozzles were placed 150 mm apart from the cutting board and with a pitch of 110 mm. The preferred spray nozzle was TYPE 1/2E x 255 manufactured by Niikura Kogyo, made of SUS304, and wide-angle circular full-surface spray 1/2B. This nozzle generates very low static electricity due to steam ejection (source pressure 6
The maximum voltage is about 400V at Kg/cm ² G, and it has a through hole (3mm
φ hole, source pressure 6Kg/cm ² G, 60000V or more) is superior in terms of safety, and wide-angle injection of steam is also possible.

On the other hand, the sulfur discharged from the outlet plates 18 and 20 to the shipping port 3 falls onto the loading platform T of the truck located below the shipping port 8 and is received therein.

In addition, an inert gas, for example, a gas, is introduced into the casing 10 via the _N2 line 40 to prevent dust from exploding. The conduit is also used to appropriately discharge steam within the dust protection device. Naturally, the pipe line 40 can also be provided separately for N ₂ gas inflow and steam discharge.

Next, the operation mode of the dust generation prevention hopper according to the present invention will be explained.

As understood from the above description, the material M in the hopper storage main body container 2 falls into the dust prevention device 4 by opening the hopper gate 6, and first
It is received by the wall board 12. The material M slides down on the first wall board 12 and falls onto the second wall board 14. The material M on the second wall board 14 slides down on the second wall board and falls onto the third wall board 16. The third wall plate 16 transfers the material M to the outlet plates 18 and 2.
0, the material M is discharged through the outlet plates 18, 20 into the shipping port 8 and then falls into the loading platform T of the truck. When the sulfur M slides down as described above, steam is injected onto the material M via the spray nozzles 30 to 35. The material M moving through the dust protection device 4 is therefore mostly or entirely humidified therein by steam. Therefore, dust is completely prevented from flying up inside the device or even when it is released from the inside of the device to the outside. Also, since steam is lighter than air and _N2 gas, the dust generator 4 is filled with it, so even if a small amount of dust is generated inside the device, the dust comes into contact with the steam and becomes heavier in apparent weight, causing it to fall. It mixes with sulfur powder and does not remain suspended for long. There is a concern that steam may escape from the upper hopper gate 6 and the lower outlet 8,
In fact, both ports are substantially closed by the continuously moving material M, and the escape of steam is extremely small. Therefore, a large amount of steam escapes to the outside and does not come into contact with rotating parts or other parts and have an adverse effect on these parts. Also, the amount of N ₂ gas that has flowed into the casing 10 that escapes to the outside is extremely reduced, and therefore the amount of N ₂ gas supplied can be significantly reduced.

The steam used in the present invention is preferably about
at a pressure in the range of 0.2 Kg/cm ² G to about 3 Kg/cm ² G, more preferably in the range of about 0.3 Kg/cm ² G to about 1 Kg/cm ² G, and at a temperature of about 130° C. to about 1 Kg/cm 2 G. It is in the range of 150℃. Further, it is preferable that the steam be injected at a rate of about 100 Kg/cm ² to 150 Kg/cm ² per 100 tons/hr of sulfur.

Next, the dust generation prevention hopper 1' according to the present invention illustrated in FIG. 2 will be explained.
The dust generation prevention hopper 1 shown in the figure differs only in the shape and arrangement of the first, second and third blocking plates, and the hopper according to the second embodiment also differs from the hopper according to the first embodiment. It works in the same way as hoppa. That is, as is clear from the drawings, the first
The wall board consists of inclined plates 12' and 12'' in the shape of a chevron, and the second wall board is shaped like an inverted eight to receive material from the sloped plates 12' and 12'' of said first wall board. comprising inclined plates 14' and 14'' arranged in an array, and a third slant plate for receiving material from the slanted plates 14' and 14'' of the second slant plate arranged in an inverted figure-eight configuration. Like the first ridge plate, it is composed of chevron-shaped inclined plates 16' and 16''.Corresponding to each ridge plate, there are spray nozzles 30', 30'';31',31'' and 33''. ', 33'' are arranged, and furthermore, the downwardly inclined wall 1 of the casing 10
Spray nozzles 35' and 35'' are provided facing the hopper 1 according to the second embodiment.
It will be understood that the operating mode of the hopper 1' is the same as that of the hopper 1 according to the first embodiment, as described above.

The dust generation prevention hopper according to the present invention configured as described above can completely prevent the generation of dust when transferring materials from the hopper to another location, and the steam injection is not performed inside the hopper casing. The increase in _relative humidity makes it easier for static electricity to leak, and both of these have the extremely excellent effect of acting in the direction of preventing dust explosions. Further, the hopper according to the present invention has a simple structure, low manufacturing cost, and low operating cost.

In the above explanation, the present invention has been described as applied to flaky sulfur, but it is understood that the present invention is not limited to these examples and can be applied to other materials other than sulfur. will be done.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a first embodiment of a dust generation prevention hopper embodying the present invention. FIG. 2 is a schematic sectional view of a second embodiment of a dust generation prevention hopper embodying the present invention. 1, 1': Dust generation prevention hopper, 2: Storage main body container, 4: Dust generation prevention device, 6: Hopper gate, 8: Shipping port, 12, 12', 12'': First jamb board, 14, 14' , 14″: 2nd jiyama board, 1
6,16',16'': 3rd jiyama board, 30,3
0', 30'', 31, 31', 31'', 32, 33,
33', 33'', 35, 35', 35'': Spray nozzle, 40: Nitrogen gas inlet, steam outlet.

Claims (1)

[Scope of claims for utility model registration] 1. A material storage main container having a hopper gate,
The dust generation prevention hopper is equipped with a dust generation prevention device that surrounds the hopper gate and is integrally attached to the material storage main body container: The dust generation prevention device has an upper part connected to the storage container main body, a casing having a shipping port for discharging material at a lower portion; a first wall plate disposed at a lower portion of the hopper gate and inclined downward to receive material from the hopper gate;
a second barrier plate provided at an angle to receive the material that has slid down on the first barrier board and further transport the material downward; a second barrier board that has slid down on the second barrier board; A third wall board is provided to be inclined downward to receive the material and guide the material to the shipping port; and a steam injection means is provided facing the wall board. The dust generation prevention hopper is characterized by: 2. The first barrier board is provided to be inclined in the first inclination direction in order to receive the material from the hopper gate; The third barrier board is provided to be inclined in a second direction of inclination that is opposite to the first direction of inclination; A dust generation prevention hopper according to claim 1 of the utility model registration claim, which is provided at an angle. 3 The first wall board is configured in a chevron shape to receive the material from the hopper gate; the second wall board is configured in an inverted figure-eight shape to receive the material that has slid down the chevron-shaped first wall board. The dust generation prevention hopper according to claim 1, wherein the third bending plate is configured in a chevron shape in the same way as the second bending plate having an inverted figure-eight shape. . 4. The dust generation prevention hopper according to claim 2 or 3 of the utility model registration claim, wherein the material is flaky sulfur. 5. The dust generation prevention hopper according to claim 2 or 3, wherein the first, second and third bending plates are attached to the casing at an angle greater than the angle of repose of the material. 6 The 1st, 2nd and 3rd wall boards are 45 degrees horizontally.
The dust generation prevention hopper according to claim 4, which is attached to a casing at an inclination of more than 100 degrees. 7. The dust generation prevention hopper according to claim 1, wherein each of the steam injection means is a wide-angle circular all-over injection type spray nozzle. 8. The outlet of the casing is provided with a pair of opposing and downwardly inclined rubber plates, each of which is attached at one end to the casing and whose free edges at the other end resiliently abut against each other under normal conditions. A dust generation prevention hopper according to claim 1 of the utility model registration claim, which is constructed so as to fit together. 9 Steam is approximately 0.2Kg/ ^cm2G to approximately 3Kg/ ^cm2G
The dust generation prevention hopper according to claim 4, wherein the dust generation prevention hopper has a pressure in the range of 130°C to 150°C. 10. The dust generation prevention hopper according to claim 9, wherein the steam has a pressure in the range of about 0.3 Kg/cm ² G to about 1 Kg/cm ² G.