CN202315779U - Powder homogenizing bin - Google Patents

Abstract

The utility model discloses a powder homogenization bin. The homogenization bin includes a cylindrical bin body, a bin top, a bin wall and a conical bin bottom, and a feeding hole and a dust collection pipe interface are arranged on the bin top. , there is a manhole on the wall of the warehouse, and a discharge cylinder is installed in the center of the conical warehouse bottom. A valve is installed on the discharge cylinder. In the conical warehouse bottom, the center of the conical warehouse bottom is the center of the circle. A partition, which is installed radially, divides the bottom of the warehouse into multiple fan-shaped partitions; a layer of orifice plate is welded and installed in the fan-shaped partition, and the orifice plate is parallel to the bottom plate of the conical warehouse bottom; An air intake pipe is installed on the base plate, and an air intake control valve is installed on the air intake pipe. The powder homogenization bin of the utility model integrates the functions of mixing, homogenizing and storage, and can meet the needs of high-efficiency mixing and homogenizing in large quantities for some special powder materials such as alumina. It has the advantages of high efficiency, good effect, low energy consumption, small dust pollution and flying loss, etc.

Description

A powder homogenization bin

technical field

The utility model relates to the technical field of alumina production, in particular to a powder homogenization bin which can realize powder mixing and homogenization. the

Background technique

In powder production, it is often necessary to mix various powders together in a certain proportion, or to mix a certain amount of powders evenly, so as to achieve the uniformity and consistency of chemical composition and other performance indicators. It is called "mixing" and "homogenization" in production. Especially for some special-purpose alumina powders, there are high requirements on the consistency of performance indicators and the stability of product quality. In order to eliminate fluctuations in performance indicators and stabilize product quality, homogenization equipment must be used to homogenize the product. the

At present, there are three types of homogenization technologies involving powders: gravity homogenization, mechanical homogenization and pneumatic homogenization. Gravity homogenization is to use the "funnel effect" produced by the difference in the feeding speed between the center of the container and the surrounding area or the change of the flow direction of the material in the bin to achieve mixing and homogenization. The main equipment is the gravity homogenization bin. Gravity homogenization has low efficiency and poor effect, so it is rarely used alone at present. What Chinese patent 95222671.5 discloses is exactly a kind of gravity type mixing device. Mechanical homogenization is divided into two types: container rotating type and stirring type. The container rotating type is to put the material into the container, and when the container rotates, the material rolls repeatedly in it, so as to realize homogenization. There are mainly V-type mixers, cone mixers, three-dimensional mixers and other models. The stirring type relies on the movement of a mechanical stirring device installed in a fixed container to drive the relative movement of the material, thereby achieving homogenization. There are paddle type, moving disc type, fixed disc type, roller type and other models. The mechanical mixing and homogenizing equipment is reliable and the homogenization effect is good. However, due to the limited volume of the container, the homogenization amount is generally not more than 3 tons each time. needs of transformation. Moreover, the loading and unloading of the equipment mostly rely on manual operation, which has high labor intensity, low production efficiency, and large dust pollution and flying losses. the

Pneumatic homogenization technology is a combination of airflow conveying technology and gravity homogenization technology, relying on airflow to drive material movement, and using air stirring and gravity homogenization to achieve mixing and homogenization. Pneumatic homogenization equipment is generally called homogenization warehouse or homogenization warehouse. Because of its simple structure and high production efficiency, the volume of a single warehouse can reach dozens of tons, or even hundreds of tons, which can meet the needs of large batches of homogenization, and has both homogenization and storage functions. Therefore, since the 1970s, in cement The production industry has been widely promoted and applied, and has been continuously developed and improved. The existing intermittent homogenization bins are divided into types such as inner tube type, outer tube type, and inflatable box type according to the structural form. The air delivery pipe of the inner tube type homogenization bin is installed inside the bin, and the air delivery pipe of the outer tube type homogenization bin is installed outside the bin, both of which use air flow to transport the material at the bottom of the bin to the top of the material layer, and then fall to the bottom under the action of gravity department. Repeat this cycle until it is evenly mixed. Chinese patent 200920121226.1 discloses an inner tube type powder homogenizer. Chinese patent 03150704.2 discloses an outer tube type powder conveying and mixing device. The inflatable box-type homogenization bin is installed with multiple inflatable boxes at the bottom of the bin. When compressed air is introduced into the inflatable box, the materials accumulated on the inflatable box will be "fluidized", driven by the air flow and stirred. , like water boiling, rolling up and down, vigorous movement, so as to play a homogenizing effect. The aeration box of the existing cement homogenization silo in the cement industry is an independent component prefabricated outside the silo. After installation, there are gaps between the aeration boxes, and materials will accumulate in these gaps, which are not easy to clean. And because the chemical composition, specific gravity, particle size, fluidity, production requirements, process control and other physical properties of alumina and other powder materials are different from those of cement, the production equipment of the cement industry cannot be copied. Chinese patent 200920350576.5 discloses a powder homogenizer and a powder air flow homogenizer. The homogenization device belongs to the inflatable box-type homogenization bin, and its partition method is to divide the bottom of the bin into several concentric circular areas around the central axis of the bin body, and supply compressed air to each area sequentially to make the materials in the inflatable area generate Fluidization, under the driving and stirring of the airflow, achieves the purpose of homogenizing the material. Due to the large difference in area between the annular area near the center of the circle and the annular area far from the center of the circle in this partitioning method, the difference in air distribution intensity will be too large, which is not conducive to homogenization. And its air distribution device is non-woven fabric or sintered metal plate, which is not suitable for powder materials such as alumina. the

Utility model content

The purpose of the utility model is to provide a powder homogenization bin which can realize powder mixing and homogenization for the problems existing in the prior art. the

The above purpose is achieved through the following scheme:

A powder homogenization bin. The homogenization bin includes a cylindrical bin body, a bin roof, a bin wall and a conical bin bottom. A feeding hole and a dust collection pipe interface are arranged on the bin top. There is a manhole on the wall, and a discharge cylinder is provided at the center of the conical warehouse bottom, and a valve is installed on the discharge cylinder. It is characterized in that, in the conical warehouse bottom, the The center is the center of the circle, and a plurality of baffles are installed, and the baffles are installed radially, and the bottom of the warehouse is divided into a plurality of fan-shaped partitions on average; a layer of orifice plates are welded and installed in the fan-shaped partitions, and the orifice plates are connected with the The bottom plate of the conical bin bottom is parallel; an air intake pipe is installed on the bottom plate of the conical bin bottom, and an air intake control valve is installed on the air intake pipe.

A powder homogenization bin of the utility model is characterized in that the partition board divides the bottom of the bin into 4 to 20 fan-shaped partitions on average. the

A powder homogenization bin of the utility model is characterized in that a layer of air-permeable cloth made of fiber fabric is laid on the orifice plate, and the air-permeable cloth is fixed on the partition plate and the orifice plate by bolts and pressure plates. the

Beneficial effects of the utility model: the powder homogenization bin of the utility model integrates mixing, homogenizing and storage functions, and can meet the needs of large batches of special powder materials such as alumina and high-efficiency mixing and homogenization. It has the advantages of high efficiency, good effect, low energy consumption, small dust pollution and flying loss, etc. Moreover, the homogenization bin uses the bottom plate of the conical bin bottom to make the inflatable box structure, which not only has a simple structure, but also avoids the problem of material accumulation after the prefabricated parts of the inflatable box are installed. The bottom of the bin is smooth and easy to clean. the

Description of drawings

Fig. 1 is the front view of the powder homogenization bin of the utility model;

Fig. 2 is a top view of the bottom of the powder homogenization bin of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described. the

A powder homogenization bin, the bin body is cylindrical, including a bin top 1, a bin wall 2 and a conical bin bottom 5. A feeding hole 13 and a dust collection pipe interface 15 are provided on the roof 1 . A manhole 13 is provided on the warehouse wall 2 . The center of the conical bin bottom 5 is provided with a discharge cylinder 9 on which a valve 8 is installed. Open the valve 8 to allow the material in the homogenization bin to flow out. Controlling the opening of the valve 8 can control the discharge flow. In the conical warehouse bottom 5, take the center of the conical warehouse bottom 5 as the center of circle, and divide the warehouse bottom into 4 to 20 fan-shaped partitions in a radial shape with a partition 6. The section of dividing plate 6 is T-shaped, and the base of dividing plate 6 is welded on the bottom plate of conical warehouse bottom 5, and the two ends of dividing plate 6 are respectively welded on the inner side of warehouse wall 1 and the outer wall of discharging cylinder 9. The upper plane of the dividing plate 6 is parallel to the bottom plate of the conical bin bottom 5 . The distance L between the upper plane of the partition plate 6 and the bottom plate of the conical bin bottom 5 is not less than 20 mm. Separator 6 can be welded with steel plate or angle steel, and the upper plane of separator 6 is evenly distributed with screw holes. In each partition surrounded by the partition plate 6, the bin wall 2 and the discharge cylinder 9, a layer of orifice plate 11 is welded and installed, and the orifice plate 11 is parallel to the bottom plate of the conical bin bottom 5. The surroundings of the orifice plate 11 are respectively welded on the upper plane side of the dividing plate 6, the bin wall 2 and the outer wall of the discharging cylinder 9. A breathable cloth 12 made of fiber fabric is laid on the hole plate 11, and the breathable cloth 12 is fixed on the partition plate 6 and the hole plate 11 with the bolt 3 and the pressing plate 4. An air intake pipe 10 is installed on the bottom plate of the conical warehouse bottom 5 . An air intake control valve 7 is installed on the air intake pipe 10. By setting the opening and closing procedures of the air intake control valve 7, the above-mentioned partitions are divided into several groups, and every two symmetrical partitions form a group. The intake control valves 7 of each group are opened or closed simultaneously. When working, the compressed air control device controls the opening or closing of the intake control valve 7 according to the set program, and sequentially feeds compressed air into each group to fluidize the material in the inflatable area. Driven by the air flow and stirred , like water boiling, rolling up and down, vigorous movement, the materials on the adjacent sides of the inflatable area will continue to collapse, enter the inflatable area, and mix. With the rotation of the inflatable area, the material in the warehouse can be mixed up and down, left and right, and radially, so as to achieve the purpose of homogenizing the material. the

Claims (3)

1. A powder homogenization bin, said homogenization bin comprising a cylindrical bin body, a bin roof, a bin wall and a conical bin bottom, on which a feeding hole and a dust collection pipe interface are arranged on the bin top, There is a manhole on the wall of the warehouse, and a discharge cylinder is provided at the center of the conical warehouse bottom, and a valve is installed on the discharge cylinder. It is characterized in that, in the conical warehouse bottom, the conical warehouse The center of the bottom is the center of the circle, and a plurality of baffles are installed, and the baffles are installed in a radial shape, and the bottom of the warehouse is evenly divided into a plurality of fan-shaped partitions; a layer of orifice plates are welded and installed in the fan-shaped partitions, and the holes The plate is parallel to the bottom plate of the conical bin bottom; an air intake pipe is installed on the bottom plate of the conical bin bottom, and an air intake control valve is installed on the air intake pipe. 2. A powder homogenization bin according to claim 1, characterized in that, the partition divides the bottom of the bin into 4 to 20 sector-shaped partitions on average. 3. A powder homogenization bin according to claim 1 or 2, characterized in that a layer of air-permeable cloth made of fiber fabric is laid on the orifice plate, and the air-permeable cloth is fixed on the partition with bolts and a pressure plate and orifice plate.

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