JPS6030615B2 - Dust generation prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a device for preventing the generation of dust generated during cargo handling operations using a belt conveyor, hopper, etc. It is called "substance."

This invention relates to a dust generation prevention device that is effective in cases where a large amount of dust is dropped all at once or continuously. Although the present invention can be applied to cargo handling operations for various materials, it can be particularly effectively applied to conveying flaky sulfur using a belt conveyor or the like to the loading platform of a ship or truck. Conventionally, when sulfur flakes were shipped onto a truck using a truck shipping belt conveyor, there was a drop of about 1 m from the exit of the compare casing to the truck bed. The impact generated an extremely large amount of dust, which was 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, for example, as disclosed in Utility Model Application Publication No. 51-692-8, "Tokukoku Sho 51-4, No. 1 ~ and Tokko Kokoku Sho 52-20749,"
There are ways to prevent the generation of dust by applying foam, water, or water and water-repellent polymer materials to dust-generating substances, but it is impossible to completely dispose of the dust generated when a large amount of dust-generating substances is transferred. In addition, there is a suction method using a blower that has been studied in steel works, etc., and this blower suction method is also used to prevent the generation of flaky sulfur dust as described above. This method is a method in which the generated dust is sucked in with a blower, then separated and collected with a back filter, etc. In order to prevent the generation of flaky sulfur dust, etc. It is used as a countermeasure against dust inside.
Even if a hood, etc. 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, and it cannot be expected to effectively prevent the generation of dust. It is no exaggeration to say that there is currently no solution to dust prevention.Furthermore, ``The conventional blower suction method naturally requires the installation of a suction duct, a blower, a back filter, etc., and the installation cost is extremely high. There are problems in that dust collection work is required and operation becomes extremely complicated.Additionally, in operations that handle powder, it is necessary to prevent dust explosions within the casing from occurring. required.

For this purpose, it was necessary to blow nitrogen (N2) gas into the compare casing and control the oxygen (02)% to below the limit of dust explosion. There is a risk of dust explosion in storage and shipping equipment, and to prevent this, it is necessary to control the 02% below the explosion limit by blowing inert gas.
However, the conventional blower suction method has the drawback that the inert gas is also sucked by the blower, resulting in an enormous amount of inert gas being required and an extremely high operating cost. In order to solve the conventional method and device for preventing dust generation, the applicant brings steam into contact with dust generated in production, storage, and shipping equipment of dust-generating substances to prevent dust generation. have proposed a method and device for this purpose (No. 53-1510710 of Tsubakigao), and the present invention relates to an improvement of the device.

For example, when dust-generating substances such as sulfur flakes are transported or dropped in large quantities at once or continuously, steam should be brought into even contact with all or most of the substances. It becomes extremely difficult to prevent the generation of dust. Therefore, the main object of the present invention is to provide a dust generation prevention device that can prevent the generation of dust by uniformly contacting all or most of the falling dust generating substances with steam. The goal is to provide the following.

An object of the present invention is to provide a dust generation prevention device that can prevent dust generation while preventing dust explosions.

An object of the present invention is to provide a dust generation prevention device that is particularly effective in preventing flaky sulfur dust.

An object of the present invention is to provide a dust generation prevention method and device 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 method and device for preventing dust generation that is easy to operate and inexpensive to install.

The above-mentioned objectives are to ensure that the dust-generating substances that are fed all at once or continuously are ``inspected'' by a group of chevron-shaped Nojiyama boards arranged in multiple stages in a lattice pattern and by a steam injection means, and are brought into sufficient contact with the steam. This is achieved by the present invention configured to allow this.

If the material is flaky sulfur, it will be brought into contact with sulfur steam. This has the effect of suppressing the generation of dust itself and eliminating the possibility of dust explosion.In addition, the humidifying effect of steam also has the effect of preventing static electricity, contributing to improved safety.Also, the humidifying effect of steam will not increase the moisture content of the product.Next, the dust generation prevention device according to the present invention will be explained with reference to drawings showing embodiments thereof.Referring to FIG. The dust generator 1 includes a casing 6 having a material inlet 2 at its upper end and a material shipping port 4 at its lower end.

The cross section of the casing 6 is rectangular as shown in FIG. 2, but is not limited to this. Inside the casing 6 are elongated chevron shaped boards 8a to 8e.
are provided in parallel and spaced apart from each other and over the entire width of the casing 6.

Below the first stage board groups 8, 8a to 8e, there are further provided second stage board groups 8, 8a to 18e. The second-stage baffle plate group 0 also has elongated chevron-shaped baffle plates 8 a to takashi Qe in parallel with each of the first-stage baffle plate group fins a to todoroki. Although they are spaced apart from each other and are provided over the entire width of the casing shell, the second wall plates 8a to lob are arranged perpendicularly to the first wall plates a to 88. Said second Jiyama board group turtle Q
In the lower direction of the casing 6, there is provided a third wall extending over the entire width of the casing 6 and spaced apart from each other in a relationship perpendicular to the second baffle plates 10a to 106, that is, in the same direction as the first baffle plates 8a to 8e. A group of boards 127 12a to 2d are provided.

The third wall boards 12a to 12d, which have the same elongated shape as the first and second wall boards, are located at positions corresponding to the gaps between the first wall boards constituting the first wall board group 10. As if to please, the third board 12a to 2d and the first board 8a to 8e are arranged in a discrepancy relationship. Further, below the third jiyama board turtle 2, there is a third jiyama board turtle 2a.
~12d, that is, in the same direction as the second diagonal plates oa to IQe, over the entire width of the casing 6 and spaced apart from each other, a fourth diagonal plate group 14, 14a~]
4d is provided.

The fourth jiyama board turtles 4a to 4d, which have the same elongated chevron shape as the first, second and third jiyama boards, are the second jiyama board turtles 8.
In other words, the second jiyama boards IQa to 10e and the fourth jiyama board turtles a to 14d are arranged in a discrepancy relationship so that they are located at positions corresponding to the gaps between the second jiyama boards. As mentioned above, the first, second,
Even if the third and fourth board groups 8, army 0, turtle 2, and turtle 1 are arranged in a grid pattern that is orthogonal to each other and offset from each other,
Therefore, the material M fed into the inlet 2 of the casing 6 will always collide with one of the cutting boards at least once, and will be completely dispersed by the time it reaches the outlet 4 of the casing. .

In the dust generation prevention device 1 according to the present invention, a spray nozzle is further provided below and adjacent to each of the above-mentioned cutting boards. That is, "below each of the sill boards 8a to 88 of the first slender board group 8, a plurality of spray nozzle groups 16a to 16e are installed along the longitudinal direction of the narrow slender boards, respectively.
provided. Each spray nozzle is connected to a steam source 301 via a connecting pipe 32. Accordingly, steam is injected from each spray nozzle, and the material introduced into the casing 6 and dispersed by the chevron-shaped diagonal plate is applied with steam from the nozzles and falls into the shipping port 4 of the casing 6. The shipping port 4 has exit plates 34 and 3.
6 is provided. The exit plates 34 and S6 are preferably rubber plates and are held closed against each other when no material is on the exit plates, but material falls onto the exit plates 34 and 36. When the material is placed in a horizontal position, the rubber plate sag due to the weight of the material, and the material is made to fall into the shipping port 4.Moreover, to explain the above-mentioned horizontal construction specifically, each chevron-shaped board is preferably The stainless steel plate is preferably made of a stainless steel plate (for example, SUS304), and the material fed from the casing inlet collides with the stainless steel plate.

The angle of inclination of each side plate from the horizontal and the angle of inclination of the casing bottom inclined wall 6' and the outlet plates 34, 36 with respect to the horizontal are determined by the angle of repose of the material to be handled, e.g. If the material is sulfur, the angle of repose of sulfur is considered to be 35 to 45 degrees, so it is preferable that all angles be 450 or more.Such angles are not critical, and may vary depending on the type of material being handled. As understood from the foregoing description, the spray nozzles for injecting steam onto the dust-generating material can be of any size, shape and number as desired. It is not limited to those listed below.
A preferred spray nozzle is TYPEI'2 manufactured by Arakura Kogyo.
B x 225 Material SUS304t Wide-angle circular full-surface injection 1'
It was 2B. This nozzle generates very low static electricity due to steam injection (maximum of about 400 V at G of 6 kg of original pressure), and is safer than a drilled hole (more than 60,000 V at G of 3 side ◇ hole, Motono 6 kg/G). It is also excellent in terms of angle and wide-angle injection of steam. Outlet plates 34 and 36
The sulfur discharged from the tank to the shipping port 4 falls onto the truck bed T located below the shipping port 4 and is received there.

Further, an inert gas, such as N2 gas, is introduced into the casing 6 by suitable means (not shown) to prevent explosion of dust.

Next, the operation mode of the present invention will be explained. As can be understood from the above explanation, a known conveyor conveyance device or a hopper (not shown) is used to enter the inlet 2 of the dust generation prevention device 1 according to the present invention. When a large amount of dust-generating material M is fed in, the material M first collides with the first stage cutting board group 8 and is dispersed, and the material that has passed through the first stage cutting board group 8 is transferred to the second stage cutting board group 8. It collides with the baffle board group 10 and is dispersed.

This dispersion of the material is continued by the third and fourth row board groups 12 and 141, and the material is completely dispersed.At the same time as the dispersion of the board, steam is sprayed. The material M is injected through a nozzle.Therefore, all or most of the material M falling while being dispersed within the casing is humidified within the casing, and is discharged within the casing and from within the casing to the outside. Dust is completely prevented from rising up even when the air is in the air. Also, since steam is lighter than air and N2 gas, the casing is filled with steam, so even if a small amount of dust is generated in the room, the dust will be completely eliminated. When it comes into contact with the steam, its apparent weight increases, and it falls and mixes with the sulfur powder, and the floating state is not maintained for long.There is a concern that the steam may escape from the upper droplet 2 and the lower outlet. In reality, both □ are substantially blocked by the continuously moving material M, and there is very little steam escaping.Therefore, a large amount of steam escapes outside the casing and comes into contact with rotating parts and other parts. This will not have any adverse effect on these parts.Also, the amount of N2 gas that has flowed into the Gagawa Sing 6 and escapes to the outside is extremely small, and therefore the amount of N2 gas supply grooves is significantly reduced. The steam used in the present invention preferably ranges from about 0.2 k9/mG to about 3 k9/mG, more preferably from about 0.3 kg/mG to about IX9
/ Days in the range of average G...force, and the temperature is approximately 130℃
to about 150°C. Also, steam has a sulfur content of 10
About 100k9/swimming to about 150k9 for urinary hr
It is preferable to inject at a ratio of 1/2. The dust generation prevention device according to the present invention configured as described above is capable of completely preventing dust generation even if a large amount of material is fed into the device temporarily or in total. In addition, injecting steam tends to lower the 02% inside the casing, and the increase in relative humidity makes it easier for static electricity to leak, both of which are extremely effective in preventing dust explosions. It has a fruit that has been cultivated.

Furthermore, the device according to the present invention has a simple structure, low manufacturing cost, and low operating cost.In the above explanation, the present invention was applied to a device for conveying flaky sulfur, but the present invention It will be understood that the invention is not limited to these examples, but can be applied to other materials besides sulfur.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of a first embodiment of a dust generation prevention device E embodying the present invention. FIG. 2 is a schematic plan view of the dust generation prevention device shown in FIG. 1. 1~…Dust generation prevention device t2・…”Entrance, turtle….・
・Shipping port, 8...Casing, 8...1st stage board group, io...2nd stage board group, turtle 2...3rd stage board group" 14...4th stage board group Yamaita group, 16, 18, 20?
22...Spray nozzle "3Q...Steam source, 3
4,38...Exit board. Figure 1 Figure 2

Claims (1)

[Claims] 1. A casing having an inlet through which materials are brought in and an outlet through which materials are sent out; inside the casing, at least a plurality of chevron-shaped diagonal plates are arranged parallel to each other and spaced apart. The configured first wall board group is arranged below the first wall board group, and the respective ground boards of the first wall board group are arranged in a perpendicular relationship in parallel and spaced apart from each other. a second mountain board group composed of a plurality of chevron-shaped mountain boards provided as a base, and each of the second mountain board groups arranged below the second mountain board group; A third wall board group is provided, which is composed of a plurality of chevron-shaped wall boards arranged in parallel and spaced apart from each other in an orthogonal relationship; A dust generation prevention device characterized in that a steam injection means is provided adjacent to and adjacent to the device. 2. The dust generation prevention device according to claim 1, wherein the material is flaky sulfur. 3 Steam is approximately 0.2kg/cm^2G to approximately 3kg
/cm^2G pressure and about 130℃ to about 150℃
3. The dust generation prevention device according to claim 2, wherein the dust generation prevention device has a temperature in the range of . 4 Steam is approximately 0.3kg/cm^2G to approximately 1kg/
The dust generation prevention device according to claim 3, having a pressure in the range of cm^2G. 5. The dust generation prevention device according to claim 2, wherein the steam is injected at a rate of about 100 kg/cm^2 to about 150 kg/cm^2 per 100 tons/hr of flaky sulfur. 6. The dust generation prevention device according to claim 1, wherein the chevron-shaped wall board has an inclination greater than the angle of repose of the material. 7. The dust generation prevention device according to claim 1, wherein each of the steam injection means is a wide-angle circular surface 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. The dust generation prevention device according to claim 1, which is configured to fit together.