JPH02273529A - Mixing device of granular material - Google Patents

Abstract

PURPOSE: To cost-effectively use a silo by utilizing a pressurized gas in order to withdraw and mix materials from plural points in a vessel through perpendicular downcomers and circulating the withdrawn materials so as to return the materials to the apex of the vessel through a central lift pipe. CONSTITUTION: A silo 1 having a conical bottom end 2 is internally provided with an inner conical body 10 formed of a hollow truncated conical body so as to form a material region 17 with the bottom end 2. The plural downcomers 30 are mounted at the inside of the silo in the positions apart spacings in a circumferential direction around the periphery of the silo 1 in order to supply the materials from the inside of the silo to the region 17. Further, the conical bottom end 2 has openings 3 which are aligned to a perpendicular lift pipe 20 and are parted from each other. The opinions 3 are adapted to be connected to a gaseous fluid supply source and the pressurized gaseous fluid is supplied to the inlet 25 of the lift pipe 20, by which the materials are lifted through the lift pipe 20 from the region 17 to an outlet 26 and are mixed.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field of the Invention Apparatus for mixing particulate materials such as plastic pellets ff1. -Open. The present invention
Inside the vessel through vertical descent? ! Pull out materials from several locations! It is based on the concept of IJ, ) and mixing, and in this way, the extracted material is returned to the container 11 through the central rift) and circulated as in 1. For this reason, an internal VI ring device using 1t-gas is used. In particular, the book, ]Ii: MingfJ 1986
No. 06/848,005, filed on April 3, 2005, filed April 3, 2005, by the present applicant.

In detail, the present invention utilizes an existing on-vehicle oriented storage tank for granular materials and has the advantage of converting such an existing tank into a mixing station. IIJ
m to ITj.

Problems to be solved by the present applicant and related U.S. patent applications mentioned above) = The open mixing device arrangement 81 includes a container with a 1-yen inscription on the bottom. A cylindrical hfl valve part is provided at the bottom of the container tJ. , a vertical lift tube is attached to the center of the vessel and extends from this part of the lino j-tube to the tube extension. (The cylindrical extension part 8J and the lift pipe are connected to the seal leg.) dimensioned to form lj3
31. Prevents air from bypassing the vertical lift pipe and flowing directly into the container. There are sea urchins. This configuration improves the circulation of material through the container.

This bottom protrusion or cylindrical extension may be modified in shape and fit when an existing conical bottom tank is being retrofitted for use as a mixing device. Unfavorable in this respect. If there is insufficient clearance between the bottom of the container and ground level to accommodate this cylindrical extension and the equipment assembled to it, the entire tank may be
8reet). This is not only expensive, but also not always possible. This is especially not possible when there are restrictions, such as when the tank is located inside a building. An alternative is to raise the bottom of the silo. However, this task is also not always permissible. This is because the storage capacity of the silo is considerably reduced. A third alternative is to form a bit on the underside of an existing silo to accommodate the cylindrical extension. However, this method is not always satisfactory. This is because it creates problems with the existing foundation structure and creates areas where water can accumulate.

Utilizes the advantages of Applicant's above-mentioned prior application over existing 11 equipment equipment to reduce the required seal leg and associated material handling! ! It would be advantageous to have a design that eliminates the need to lift existing silos or dig out bits to accommodate 1@.

It is therefore an object of the present invention to provide a device for mixing granular materials that allows existing storage silos with conical bottoms to be used economically.

- In general, the foregoing and other purposes are achieved by forming a vertically oriented silo with a conical upper and lower end; an inverted conical truncated body with a hollow end opened and installed inside the silo or container so that the small diameter opening end is located on the D side of the large diameter N opening end; a hollow, open-ended cylindrical member is secured to the small-diameter open end of the truncated body and extends downwardly from the cough end toward the lower end of the silo; a vertical lift tube; is attached to the inside of the silo or container and extends upward from the bottom of the cylindrical member from the lower end of the silo or container through the leopard part and the truncated body to the upper end of the silo; that the truncated body has a plurality of circumferentially spaced apertures formed in the vicinity of the large diameter n-end adjacent to the silo; a plurality of tubes connected in communication with each of the openings extend from the openings toward the lower end of the silo; and terminating above the frustum, each of these downcomers having at least one opening for receiving material from the top of the silo to force the material into the frustum by gravity. The pressurized gaseous fluid is supplied to the lower end of the silo and the material in the region between the truncated body and the silo r is This is accomplished by providing an apparatus including means for mixing the material by transporting it through a lift tube at an inlet lv to the top of the silo or vessel.

Spaced apart from the conical sphere of the existing container, the present invention
It is provided that a conical frustum with a hollow end is attached therein so that it can be opened.

At the bottom of this inner cone! 1 lall material is installed. A solid lift tube extends from near the lower end of the container's existing conical bottom, ie, the outer cone, to the top of the container. This open-ended cylindrical member and vertical lift tube are
The first seal leg is dimensioned to form a first seal leg around the lift tube by forming concentric channel annulus.

This device has a mixing air intake at the bottom of the container that entrains the material in the container and conveys it to the lift tube, allowing the material to exit at the top of the container. The concentric annular part allows this air to bypass the vertical lift pipe and fluidize the material inside the container by scattering it. Target 1. , the first seal is sized to form a knock to prevent knocking.

The fresh tortoise tube is accommodated in the inner cone's thk: T: container and inserted. These downcomer pipes are formed with an inner cone (V-shaped) and are closed at a position above the opening.

A plurality of second seal legs are formed downwardly from the open IJ of the inner cone toward the outer cone.

These openings 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, ,, ,, , , , , , , , , , , , , , , , , , , , , , , , , , 1, , , , , , , , , 1, , , , , , , , , , 1, , , , , , , , , , , 1, , , , , , , , , , 1, , , , , 1, , , , , 1, , , 1, , , , , 1, ,
It is combined τ. The second seal legs are approximately the same length as the first seal legs (formed in five concentric rings).

This inner cone performs a variety of functions, including the following functions: 1. Form a first sealing leg with the vertical lift tube to ensure material circulation through the vertical lift tube, and also to lift the existing Ij'' Or Lt improves the a-coupling without reducing the existing Jj I['' feature.

2 Spoke 6L located in the high-tension solid flow I# path
The first seal knock can be achieved without any need for any structural members of the spider leg).

3. Support all of the second seal legs. .

4. The horn 1 should be passed to the rlA distance #1 between the pipe and the tank shell. A place is formed where an internal lower support member for holding the lift pipe can be placed.

Referring preferably to FIG. 1, the 4J Iro (orientated 4J Iro) is designated as a whole by the reference numeral 1. According to this, this container 1 was generally used for the storage of granular materials. 13 is bottom 1 Haruka J et al. PU building 2
Lower end of 1. 'Value I) There is C. A conduit 5 is connected to the elf 13 to draw material from the stack 1. A conduit 6 is connected to the conduit 5 and supplies pressurized gas from its source (not shown) to the bottom of the container 1. Valves 813 and 9 are attached to conduit 5 to allow the flow of gas through conduit 6 from the source to conduit 6 Jj and conduit 5.
J to control the gas supply layer flowing to outlet 3 through m1j′,
I can do sea urchin. This exit ['' 3 is added ft-gas person [] and the first! ! I can fulfill my 1st ability. Pal, 78
9 is the withdrawal of materials from the container t3ν''ll1
1 Ru. In the known method, valves 7 and 8 are turned on when it is desired to supply gas to container 1.
However, valve 9 is closed. When it is desired to withdraw material from the container, valve 7 is turned 1111 and valves 8 and 9 are opened. The conduit 6 not only supplies pressurized gas to the container, but also has the following characteristics:
No. 96 and No. 4,573.800, a continuous feed of particulate material to be combined is provided.

According to the invention, the inner cone 10 is formed by a hollow l, 71 head of the cone which is attached by welding to the interior of the existing container 1. This inner cone 101j, the volume i!
! Fixed to the wall 11 with large diameter opening 1.7L bait end 1
2 and a small diameter opening fζ: F side pant part 13. The hollow end is opened l: the cylindrical member 15 has an inner conical body 10
Between [J end 131. - attached, and this western piece has been extended towards the roll of 3.

Material storage WIm and material area I+117 are formed between the inner circle 11 (1) and the cone forming portion 2 of the container 1 (Z2).

The −1 end 12 of the cone 10 is provided with a plurality of openings 11 spaced apart 11 in the circumferential direction.

Lower entrance [J25 and part of exit 26 to the right]
A direct: oriented lift tube 20 is mounted centrally inside the container 1. The lift tube 20 extends from below the cylindrical member 15 downwardly through the cylindrical member and the cone 10 into the interior of the container. Riff!・Pipe 20
A spider 2) can be used to center the inside of the container 1 and the cone 10 as is known. The inner cone 10 is designed to be short (mm) so that the spider 2) does not have to span the entire length of the distance between the lift tube 2Q and the shell of the size L1.
There is one no. Additional supports for supporting the lift tube 20 can be provided in the upper part of the container.

The cylindrical member 15 has an annular area or concentric channel annulus 24 with the outer surface of the tube 20 to the rift 1, which concentric annulus is dimensioned to form a material seal as described below. has been done. The cylindrical part 4A15, and therefore the first sealing leg of the mixing device, is supported by the cone 10 and has a conical bottom 2 such that the flow of material gI''F.
There is no need for additional spokes or structural members extending from the lift tube 20 to the lift tube 20.

The interior of the vessel 1 is provided with a plurality of circumferentially spaced vertically oriented downcomers 30 . Each of these lower ti11 tubes 30 has 12a vertically spaced b1031.

These downcomers are attached around the size 09 section.

As described in Applicant's aforementioned U.S. Patent Application, opening 31 includes baffle portions 4433 extending inwardly so that material enters the stomach at various heights. I can do it. U.S. Patent No. 4.560.
See also No. 285 and No. 3,2) 6.629. These downcomers can be supported by a support at 34.

Each of these downcomers has an F-portion outlet 32, the lower outlets of which are separated by 1 mm above the inner cone 10 and are respectively aligned with the apertures 11 formed in the cone 10. has been done.

The material coming out of the downcomer pipe 30 is divided into two parts: one that enters the opening 11 and one that falls downward along the cone 10, and falls into a material reservoir inside the silo 1.

The present invention provides a plurality of circumferentially spaced conduit members 3
It is equipped with 5. Each family of these conduits n144 is connected to the opening 11 of the cone 10 as shown in FIG.

Each of the conduit members 35 extends downwardly into the interior of the region 1a17 by a distance approximately equal to the length of the cylindrical member 15, forming a second seal leg. The inner cone 10 serves to support the second sealing leg or conduit 35. Conduit 35 not only receives material from downcomer pipe 30 immediately above adjacent opening 11 but also
If the size is just above the cone 10 in the area! Materials are also received from the inside of 11 at the 6th point. This is the exit of the downcomer pipe 30]
] Seal leg 35 with an inlet having a larger cross-sectional area than 32.
This is achieved by forming the This allows the material fn I to be removed from the container 1 above the inner cone 10.
The material flowing into a 17 flows from the upper level δ of the container through the opening 31 J3'F downcomer 30.
This ensures that both the material flows in from the frontage 11 and the material flows in from the frontage 11.

FIG. 3 shows a modification of the invention. In this, the conduit 35 has a horizontal upper end and has a 1M1 EE
1 from the cone 10 through 11. It extends into the inside of the other container. This inlet 81 is designated by the reference numeral 11a and has a smaller cross-sectional area than the outlet 32. FIG. 4 shows yet another modification example. In this, the conduit 35 extends a considerable distance into the top space of the container. If desired, the designs shown in FIGS. 1, 3, and 4 may be combined so that the conduit 35 at some points is closer to the cone 10 than the conduit at other points around the periphery of the cone. Can be extended high up. In each instance, conduit 35 must be of sufficient length to form a material seal. or,
Preferably, the a:i diameter of the 8I tube population 11a is larger than the diameter of the outlet 32.

In operation of the device, assuming that container 1 is filled with material, valves 7 and 8 are listened to so that pressurized gas is supplied through conduit 6 and pipe 5 through lll [13]. done to. Valve 9 is closed to prevent material from flowing out of the container.

As seen in FIG. 1, the pressurized gas inlet 3 is aligned with the vertical lift tube 2o. In an intermittent manner, the pressurized gas entrains the material from the IFIA region 17 near the inlet 25 through the vertical lift tube 20 and into the outlet 2.
6 into the J, all space of the container. Pressurized gas is exhausted from the container 1 through the exhaust i'f 27.

The material that already existed within 8 was 1m below 111130.
It enters the inlet 31 and is carried by gravity through the downcomer pipe 30 to the outlet 32. As the material is conveyed from area 17 to lift tube 2Q, the second sealing leg or conduit 3
The sources of the material inside this conduit are both the static tube 30 and the space inside the cone 10. , history 1, the material is passed through the annular part 244 from the F part of the cone 1Q to the region 17 Φ
3. This bundle was moved from the empty IN of the 11 container to the nod t417, and the material was dropped into the 11 container. L
Returned to the subspace. This movement of the four materials moves the materials in the container from U to I! lf 1-It becomes a noguar 6
When each drawer is filled with 9 volumes of material in a container 1p, the valve 7 is closed and the pallet 88
and 9 are heard, and the '4jl material is φh(twisted) to flow F through the 1+th line 3 and conduit 5.

The length of the cylindrical member 15 and the lift pipe 20
The diameter of the center annulus 24 is such that the material can flow from one side of the cone 10 through the annulus to 'T: 'F 15, and with it, the 711 HE q Method # such that the material in the annulus 24 bypasses the pipe 20 without flowing and forms a seal of the forest material that substantially prevents it from backing up):
, is selected □ As a result, the circulation in which the material is moved from the cone 10 to the area 17 from 17j, and from the ff1ttl 17 through the lift pipe 20 to the part of the container is maintained. The length of the conduit 35 is taken as the value to form the second seal leg.
In addition, the material is moved by gravity from the empty space of the container 1 m above the cone 10 without flowing air in a short-circuit manner from the person [ ] 3 through the pipe 35 to the J-part space of the τδ vessel 1! I will do this to J, ・), which allows me to move to I Castle 17. This is the case when the conduit 35 is in the condition shown in FIG. 1, FIG. 3 or FIG. 4, or a combination thereof.

If desired, a small air flow can be introduced through the tube 40 in which the valve 41 is fed through the container by increasing the suspension of the material per air hole in the refrigeration tube 20. The circulation of materials can be increased. This additional pressurized gas is different from that shown in U.S. Pat. No. 4,569,596.

The material Jλ is directed directly toward the bottom of the lift tube and tends to blow away the material in the annular portion 24J5J and the second seal leg 35. G
, t, so this kind of scattering is caused by the cone 10 (
7) ,! -7ib day B n W U 15 (-
This will reduce the circulation of material flowing into the downflow pipe 25 and the rift tube 20.

From the foregoing, it is clear that the object of the present invention is achieved.There is no doubt that the 1U existing 11 was reused as a mixing device for granular materials, and 2 rounded A-like structures were provided. I
If the seal leg added in Applicant's earlier U.S. application is added to an existing silo, the seal leg can be fitted into a substantially rounded conical bottom 2. In addition to this, it is necessary to have a buoy 1) which is worth 2 people to accept the seal leg 4 of J: Lee R. λ"(, providing a pi for the seal leg 1. & ii c. 3rd ii) flQ f'l 1.t, its E
A conical bottom part 4 with a length of Ic-1 that accommodates the r part.
-1. Length 1! , the container storage fee is reduced to 51 yen. According to this, the inner cone 10 and the cylindrical member, together with the heavy lift tube 20, ensure the circulation of the material through the container. To form the cylindrical extension and seal leg required for the seal leg, use the $2 seal leg 35. The space 18f of 1-7J of 17 is subtracted from the utilized space l) and substantially (= to be held -C.Various heights 1] within the container (O-iF
Ffi"31i111131 k 1. The advantage of the applicant's earlier application of accepting U 11 to the TV-R tube 30 remains.

The position of the end of the first sealing leg 24 relative to the 11J conical bottom 2 of the existing container 1 is such that the length of the material being circulated through the rift I tube 20 (1''<, ) There,
Establish the 11-ratio of the circulation ffi (R,) fed through the lower fermentation tube 30 to the circulation ... (Ro) of the material fed from the F part of the inner cone through the annular part 24. It is. Here, R=Ro+Re'c.

Applicant's earlier U.S. application filed in 1986 (January-April 31)
Patent application serial number whistle 06/848゜0 filed with 1
Mixing devices of other designs, such as that shown in No. 05, are limited by geometrical constraints such that R is generally limited to ν1 equal to or less than 1.2 times R6. . The structure of the present invention can be used for R6 if desired.
It is possible to design the R8 to be 20 times or more than the R8. As shown, the bottom 16 of the tubular member 15 can be spaced apart from the outer conical end 112 by a significant spacing dimension. This distance is the length of the cylindrical member 15 (
Adjustments can be made by assimilating the material within the annulus 24 (within limits that maintain a seal) and by adjusting the position of the inner cone 10 relative to the outer conical end 2. The lower end of the lift tube 20 must be positioned sufficiently close to the gas mass/material outlet 3 to ensure that the gas entrains the material and flows upwardly through the lift tube 20.

The performance of the mixing device is the shield that the content department receives! Directly related to 1ffi. The air flowing through the lift tube 20 is the transport medium for material circulation. Prior to the present invention, 14 ml of material in one lift tube resulted in a ratio of 12:1 and 15:1 of material to air volume.
+1 was limited. This material loading limit is increased by introducing a small amount of air into the area 17 between the conical end and the cone, such as by using a conduit 40;
We believe that this will result in a - layer effective one useful mixing design. Commercially, this will result in a cheaper mixer while maintaining the same mixing performance. It is eggplant.

The foregoing description is of a preferred embodiment and the invention is limited by the scope of the appended claims.
It is intended to be limited.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a mixing device according to the invention. FIG. 2 is a sectional view taken along line 12-2 in FIG. FIG. 3 is a partial schematic diagram of a modification of the invention. FIG. 4 is a partial schematic diagram of still another modification of the invention. DESCRIPTION OF SYMBOLS 1... Silo or container, 2... Conical bottom or lower end, 3... Gas inlet or material outlet, 5.6... Conduit, 7°, 8.9... Valve, 10...・Inner cone, 1
DESCRIPTION OF SYMBOLS 1... Opening, 12... Large diameter opening end, 13... Small diameter opening end, 15... @ member, 17... Material area,
20...Lift pipe, 2)...Wear or spider 25...Inlet, 26...Outlet, 3o...Down pipe, 31...Opening, 32...Outlet, 33... Baffle, 35... Conduit.

Claims (9)

[Claims] (1) An apparatus for mixing particulate materials, such as plastic pellets, comprising a vertically oriented silo having conical lower and upper ends; an inner cone formed by a hollow conical frustum spaced from the lower end of the shape to form a material region therebetween; said inner cone having a large diameter opening; an upper end having a small diameter opening and a lower end having a small diameter opening; a hollow end opening attached to the small diameter opening lower end of the inner cone; a vertical lift tube mounted inside the silo and extending upwardly from the bottom of the cylinder through the cylinder and the inner cone to the upper end of the silo; a tube having an inlet located in the material region and an outlet located at the upper end of the silo; spaced circumferentially around the periphery of the silo for supplying material from the interior of the silo to the material region; a plurality of vertically oriented downcomer pipes mounted within the silo at spaced locations; said conical lower end having spaced openings aligned with said vertical lift pipes; , the opening is adapted to be connected to a source of pressurized gas fluid, and the pressurized gas fluid is supplied to the inlet of the vertical lift tube to lift the material from the material area and through the lift tube. 1. A device for mixing granular materials, characterized in that the device is adapted to be lifted to an outlet of a tube to mix the materials; and the opening serves as an outlet for the mixed materials. (2) The granular material mixing device according to claim 1, wherein the downcomer pipe terminates inside the silo above the inner cone, and the downcomer pipe terminates in the vicinity of the large diameter opening end. a plurality of circumferentially spaced apertures formed in the inner cone; and a plurality of circumferentially spaced apertures formed in the inner cone, the plurality of circumferentially spaced apertures being coupled in communication with each of the apertures formed in the cone and extending downwardly into the material region. a plurality of circumferentially spaced conduits disposed therein. (3) The granular material mixing device according to claim 1, wherein the inner cone has a plurality of circumferential directions formed near the large-diameter opening end of the silo at a position close to the side wall of the silo. a plurality of circumferentially spaced apertures connected in communication with each of said apertures formed in the inner cone and extending downwardly into the material region; each of the downcomers terminates at a location above the inner cone, and each of the downcomers has at least one opening for receiving material from the top of the silo and a conduit in the cone; 1. A device for mixing particulate materials, characterized in that it has an upwardly located outlet opening; (4) The granular material mixing device according to claim 3, wherein the hollow cylindrical member has a length shorter than the distance between the small-diameter opening end of the inner cone and the lower end of the container, that is, the silo. and is of sufficient length to substantially prevent pressurized gas from bypassing the vertical lift tube and into the vessel or silo space above the inner cone. Features: Mixing equipment for granular materials. 5. The granular material mixing apparatus of claim 4, wherein the conduit is of sufficient length to form a material seal between the material region and the silo interior region above the inner cone. A granular material mixing device characterized by: (6) The granular material mixing device according to claim 4, wherein the conduit has a length substantially the same as the length of the cylindrical member. (7) The granular material mixing device according to claim 6, further comprising support means extending from the inner cone to the lift tube for securing the lift tube inside the silo. A granular material mixing device characterized by: (8) The granular material mixing apparatus of claim 6, further comprising means for additionally supplying pressurized gas directly to the material region to increase the material supply to the lift tube. A granular material mixing device comprising: (9) A particulate material mixing apparatus as set forth in claim 3, wherein the hollow cylindrical member and the vertical lift tube have relative diameters and heights so as to form a material seal therebetween. and is configured to substantially prevent pressurized gas fluid supplied to the lower end of the silo through the inlet from bypassing the lift assembly. Mixing equipment for granular materials.