JPS582421Y2 - Device for attaching slurry material to the surface of granular materials - Google Patents

Description

[Detailed description of the invention] The present invention is designed to coat the surface of pulverized coal with slurry of sludge from various wastewater treatments or sludge from flue gas desulfurization to aid in the combustion of pulverized coal or cause a chemical reaction. The present invention relates to an apparatus for coating the surface of other granular or lumpy materials in order to make the substance adhere to the surface, and will be described with reference to the illustrated embodiment.

1 is a cylindrical processing cylinder with a supply port 2 for grains and lumps such as pulverized coal at the upper end and a discharge port 3 for granular materials after coating at the lower end; A dispersion body 4 for uniformly dispersing particulate matter within the cylinder 1 and a blowing nozzle 5 for spraying a slurry liquid upwards were provided below the dispersion body 4.

The illustrated dispersion body 4 is formed of a hollow cylinder having a conical upper surface 4a, several drop ports 4b on the conical surface, and a discharge port 4C at the lower end. so that the particulate matter a falling from the supply port 2 is caused to fall onto the conical projection surface of the dispersion body 4 and diffused around it, and is also discharged from the drop port 4b through the lower discharge port 4C so that it falls uniformly. However, other suitable dispersion devices may be used.

The slurry liquid is stirred with fine particles to be coated, sent to the nozzle 5 by a pump 7, and sprayed toward the granules a with pressurized air from a compressed air pipe 8.

In this way, the granules a conveyed by the conveyor are introduced into the processing tube 1 from the supply port 2, and when they fall uniformly in the tube 1 due to the dispersion 4, a slurry liquid is sprayed upward from the nozzle 5. The granules a coated with particles are taken out of the tube 1 from the discharge port 3 at the lower end and carried out by a conveyor 9.

In the above-mentioned apparatus, the inner surface of the lower peripheral wall 1' of the processing cylinder 1 is contaminated by adhesion of the slurry liquid scattered thereon, but this can be prevented by the following means.

That is, as shown in FIG. 1, chambers 11 and 12 for water storage are provided above and below the outside of the lower circumferential wall 1' of the cylinder 1 and communicated with the inside of the cylinder 1, and water is constantly discharged from the upper chamber 11 to drain the lower part. forming a water film, that is, a fluid film 6 of water on the inner surface of the peripheral wall 1;
The fluid film 6 communicates with the lower chamber 12 .

Therefore, although particles of the slurry material ejected from the nozzle 5 adhere to the inner surface of the lower peripheral wall 1', they are immediately carried downward by the water fluid film 6 and accommodated in the lower chamber 12. After removing particles from the contaminated water using a filter 13, the water is circulated to the upper chamber 11 using a pump 14.

In addition to the above, there is a third cleaning device for the inner surface of the lower peripheral wall 1'.
As shown in the figure, the lower circumferential wall 1' of the cylinder 1 is made of a porous wall 15 such as a sintered metal, and an air chamber 16 is formed on the outside thereof, and compressed air is fed into the pores of the porous wall 15. Air is blown into the cylinder 1 from the cylinder 1, and the air film 6 prevents the slurry material particles from adhering to it.

Incidentally, the dust air in the processing tube 1 is passed through the intake pipe 17 to the scrubber 18.
After being washed with water and rendered harmless, it is discharged into the atmosphere by a blower 19.

In this way, according to the present invention, granules or lumps such as pulverized coal are continuously dropped from the upper supply port 2 in the processing cylinder 1, and the granules a are uniformly distributed in the cylinder 1 by the dispersion body 4. Since particles of the slurry material are sprayed upward from the nozzle 5 during spraying and falling, the adhesion of the coating particles to the granules a is uniformly achieved, and the lower peripheral wall 1 of the processing cylinder 1, which is contaminated by the adhesion resistance of the slurry material, is 'A fluid film 6 of water or air is always formed on the inner surface of the coal, which effectively prevents contaminant particles from adhering to it, and facilitates the coating operation of particles on pulverized coal and other granular or lumpy materials. It has the effect of

[Brief explanation of drawings]

Fig. 1 is a cutaway side view of the device of the present invention, and Fig. 2 is its A-A
A line sectional view, and FIG. 3 is a partially cutaway side view showing another embodiment of contamination prevention. 1... Processing cylinder, 2... Supply port, 3...
...Discharge port, 4... Dispersion, 5...
・Blowout nozzle, 6...Fluid film, a...
Particulate matter.

Claims (1)

[Scope of utility model registration request] A cylindrical processing cylinder 1 has a granular material supply port 2 at the top and a discharge port 3 at the bottom end, and a granular material dispersion 4 located at the bottom of the supply port 2 and a slurry liquid below it. This device is provided with a blow-off nozzle 5 that sprays upward, and forms a fluid film 6 on the inner surface of the lower peripheral wall 1' of the processing cylinder 1 with a fluid film 6 that constantly removes the adhesion-resistant slurry. .