JPS5940499B2 - Equipment for mixing and dispensing solid granular materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention receives one or more particulate materials, mixes them in a container, and exits the container through a plurality of spaced-apart outlets, such as in a fluidized bed combustor. The invention relates to a mixing and dispensing device for dispensing to other locations of use.

Fluidized bed combustors have long been recognized as an effective means of generating heat.

In this type of equipment, a bed of granular material containing a mixture of a fuel, such as granular coal, and granular limestone, which is an adsorbent for adsorbing the sulfur released as a result of the combustion of the coal, is installed on a grid or grating. Air is blown through this bed to fluidize the particulate material like boiling liquid and accelerate the combustion of the fuel. A mixture of granular fuel and granular adsorbent is continuously supplied to this granular material bed through a plurality of supply pipes that are circumferentially spaced through the peripheral wall of the vessel wall containing the bed. There must be.

However, uniformly distributing a homogeneous mixture of granular fuel and granular adsorbent to multiple supply pipes is not easy from a material transportation standpoint. Therefore, the object of the present invention is to
One or more particulate materials are received from multiple sources, mixed into a homogeneous mixture by fluidizing the particulate materials with a gas stream, and the mixture is passed through a plurality of discharge pipes, e.g. It is an object of the present invention to provide a mixing and distribution device for uniformly distributing a plurality of feed pipes of a bed type combustor.

Briefly, the apparatus of the present invention comprises a container adapted to support a bed of granular material and provided with inlet means for receiving a make-up material.

Pressurized gas is introduced into the lower part of the container. The pressurized gas is passed upwardly through the material in the container and into a jet, sufficient to induce a flow of the material within the container to promote its mixing and evenly distribute the material to a number of outlets. Deploy with speed. 1 and 2, one or more supplies, such as a source of crushed coal for the fluidized bed and a source of limestone for adsorbing sulfur generated as a result of combustion of the coal. The mixing and dispensing apparatus of the present invention is shown comprising an elongated cylindrical container 10 having an open top end 12 adapted to receive particulate material from a source (not shown).

The lower end portion 14 of the container 10 is formed in the form of a conical hopper having a small diameter portion that receives pressurized gas, such as air, from an external source and directs it upwardly through the container in the direction shown by the dotted line. The inlet port 16 for passing through is aligned. Four equiangularly spaced outlet tubes 18 extend from a point within the container 10 through the container wall to a point outside the container at an acute angle to the horizontal plane.

These tubes are coated with a refractory material 20. As illustrated in FIG.
Insert it directly above.

The upper end of hole 24 communicates with a conical opening 26 that receives material flowing down within container 10 . In operation, the above two
Materials from two separate sources are introduced into the upper end 12 of the container 10 and allowed to flow down and deposit within the container by gravity.

Air is introduced into the inlet 16, the hopper 14 and the plug 2
2 through the cylindrical holes 24 and up through the particulate material deposited in the container 10. The velocity and flow rate of this air is set such that a "jet condition" occurs, ie, a portion of the material from the bed of particulate material in the vessel is blown upwardly from the top of the bed. As a result of this airflow, a central zone 30 is formed that is concentric with the axis of the container, has a low density of particulate material, and has a general direction of flow of the particulate material upward. Around the central zone 30 is formed an annular zone 32 having a high density of particulate material whose general direction of flow is downward. The central zone 30 is continuously supplied with granular material from an annular zone 32 in the vicinity of the opening 26, which granular material is blown up by high-pressure air to the upper part of the floor and then returned to the annular zone 32. and repeat the cycle. Thus, the granular materials in the bed (in this example granular coal and granular limestone) are thoroughly mixed. Part of the particulate material flows down the annular zone 32 into the discharge pipe 1.
8 and is discharged by gravity through the tube 18 to the outside of the container.

In the embodiment of Figures 1-3, four discharge pipes are provided so that the mixed material is accurately distributed to four separate sites. When this mixing/distributing device is connected to the fluidized bed combustor described above to distribute a mixture of particulate materials to the combustor, the outlet ends of the four discharge pipes 18 of the mixing/distributing device are connected to the fluidized bed combustor of the combustor. 4 installed transparently on the wall of the storage container (not shown)
Piping can be provided for connection to a book material supply pipe (not shown). Of course, the amount of particulate material supplied to the upper end 12 of the container 10 is adjusted in accordance with the amount discharged from the discharge pipe 18 so that the particulate material in the container 10 is continuously replenished.

In the embodiment of FIGS. 4-5, the fill plug 22 of the embodiment of FIGS. Penetrate and extend at an angle to the horizontal plane.

These tubes 34 receive particulate material from one or more sources and feed it into the lower portion of the hopper 14 directly above the air inlet 16, as in the previous embodiment. A central zone and an annular zone are thus formed, setting up a material flow pattern within the container similar to that of the previous embodiment.

Four equiangularly spaced vertical discharge pipes 36 are extended from one point within the vessel through the sloping wall of hopper 14 to the outside to discharge particulate material as in the embodiment of FIGS. Provides drainage to four separate external sites.

Thus, a simple construction allows for precise mixing and distribution of particulate material from one or more sources to multiple discharge points.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto and can be modified in various ways without departing from the spirit and scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a front view of the material mixing and dispensing device of the present invention, FIG. 2 is a cross-sectional view taken along line 2--2 in FIG. 1, and FIG.
FIG. 4 is a front view of another embodiment of the invention, and FIG. 5 is a cross-sectional view taken along line 5--5 of FIG. .

Claims (1)

[Claims] 1. A device for mixing and dispensing solid particulate materials, comprising a container for supporting a bed of said particulate material, material introduction means provided on said container for receiving additional material to said bed, and a pressurized gas introduction means for introducing gas into a lower portion of the container at a velocity sufficient to cause the gas to rise through the material within the container; A mixing and dispensing device comprising an aperture formed therein and a plurality of ejection means spaced around the container for ejecting the material from a plurality of parts of the bed.