Coarse powder pre-separation device

Abstract

The invention discloses a coarse powder pre-separation device which comprises a vertical barrel, a feeding pipe and an air inlet pipe, the upper end of the barrel is closed, the air inlet pipe is a bent pipe with the constant diameter, one end of the air inlet pipe is communicated with the lower end of the barrel, a coarse powder collecting hopper is installed at the low point position of the air inlet pipe in a communicated mode, and the position of the coarse powder collecting hopper deviates from the air inlet side of the air inlet pipe. The feeding end of the feeding pipe is located outside the barrel, the discharging end of the feeding pipe extends into the barrel, a pipe opening of the feeding pipe is in a vertical state, the pipe opening of the discharging end, extending into the barrel, of the feeding pipe is provided with a distribution plate, the distribution plate is a cone with an upward cone top, and the distribution plate and the pipe opening of the discharging end, extending into the barrel, of the feeding pipe are coaxial. A gap is formed between the conical surface of the distribution plate and the horizontal plane of the discharge end pipe orifice. The cylindrical flow can naturally form an umbrella-shaped material curtain, the umbrella-shaped material curtain is scattered in all directions, the material curtain can be very thin, the operation is stable and reliable, and the difficulty is avoided when the equipment is large.

Description

[0001] This invention is a divisional application of the invention patent application filed on October 23, 2020, entitled "An Umbrella-Shaped Material Distributor" with patent number "2020111459488". Technical Field

[0002] This invention relates to the field of powder separation machinery, specifically an umbrella-shaped material distributor. Background Technology

[0003] In industries such as cement, glass, ceramics, and chemicals, there are many situations where lumpy materials are turned into powder. The main equipment for grinding operations is generally a ball mill, vertical mill, or roller press. After passing through the main equipment, the lumpy material is crushed into powder. The powder includes fine powder (tens of micrometers), medium coarse powder (hundreds of micrometers), and coarse powder (millimeters). The powder needs to be separated by classifying the powder to separate the fine powder as the finished product, while the medium and coarse powders are returned to the main equipment for further grinding. The machine that separates powders according to their fineness is called a classifier. The classifier generally has rotating blades inside. Coarse powder is highly abrasive, which is extremely detrimental to the production and operation of the classifier. Therefore, before feeding the powder into the classifier, the coarse powder needs to be separated out in advance.

[0004] Currently, the main machinery for coarse powder pre-separation is the dispersing classifier and the "V"-type classifier. The dispersing classifier itself has rotating parts; coarse powder in the powder impacts the high-speed rotating blades, exacerbating wear, resulting in short continuous operating time and heavy maintenance tasks. The "V"-type classifier needs to form a rectangular curtain of material. Airflow passes through the curtain, carrying away fine and medium-coarse powders, while the coarse powder falls due to its own weight and separates. Therefore, the thinner the curtain of the "V"-type classifier, the better. The incoming material is generally a columnar flow, which needs to be changed to a waterfall flow, making it as flat and long as possible. The larger the output, the larger the aspect ratio of the "V"-type classifier's feed inlet, and the more difficult it is to change the columnar flow to a waterfall flow. Therefore, the "V"-type classifier has encountered difficulties in the process of equipment scaling up. Although this can be overcome, the side effect is that the feed pipe becomes longer and the drop greater, increasing wear and also increasing equipment and plant investment. Summary of the Invention

[0005] The purpose of this invention is to provide an umbrella-shaped material distributor to solve the problems existing in the "V"-shaped air classifier.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An umbrella-shaped material distributor is characterized by comprising a vertical cylindrical body, a feeding pipe, and an air inlet pipe. The upper end of the cylindrical body is closed. The air inlet pipe is a curved pipe with a constant diameter. One end of the air inlet pipe is connected to the lower end of the cylindrical body. A coarse powder collection hopper is installed at the lowest point of the air inlet pipe. The feeding end of the feeding pipe is located outside the cylindrical body, and the discharge end extends into the cylindrical body with a vertical opening. A distribution plate is provided at the discharge end of the feeding pipe extending into the cylindrical body. The distribution plate is a cone with the apex pointing upwards. The distribution plate is coaxial with the discharge end of the feeding pipe extending into the cylindrical body, and there is a gap between the conical surface of the distribution plate and the horizontal plane where the discharge end is located.

[0007] The umbrella-shaped material distributor is characterized in that: the cylinder is composed of three sections: the upper section is an upper cone with the apex pointing upwards, the middle section is a straight cylinder, and the lower section is a lower cone with the cone pointing downwards. The feeding pipe is inclined and enters the cylinder from the cone surface of the upper cone, and the outlet of the feeding pipe extends vertically into the straight cylinder.

[0008] The umbrella-shaped material distributor is characterized in that: an inspection door is provided on the side of the upper cone.

[0009] The umbrella-shaped material distributor is characterized in that: an annular support is welded to the lower part of the outer wall of the straight cylinder.

[0010] The umbrella-shaped material distributor is characterized in that: the periphery of the distribution plate is connected to the periphery of the discharge end of the feeding pipe by angle steel.

[0011] The umbrella-shaped material distributor is characterized in that: multiple channel steels are radially connected to the wall of the feeding pipe near the discharge end, and each channel steel passes through the cylinder and is welded to the outer wall of the cylinder as a whole.

[0012] The umbrella-shaped material distributor is characterized in that: a ring of channel steel is welded to the outer wall of the cylinder corresponding to each channel steel protrusion position.

[0013] The umbrella-shaped material distributor is characterized in that: the conical surface of the distribution plate is provided with a steel plate.

[0014] In this invention, powder is fed from top to bottom through a feeding pipe, impacts the distribution plate, and spreads out in all directions to form an umbrella-shaped material curtain; airflow is provided by a blower and blown from bottom to top through an air inlet pipe; when the airflow passes through the material curtain, it carries away the fine particles in the powder, while the coarse particles fall down and flow into the coarse powder collection hopper, thus completing the separation of coarse and fine particles; the diameter of the air inlet pipe remains constant, and the greater the air volume, the faster the air speed. By adjusting the blower speed, the flow rate and air speed are controlled, thereby achieving the purpose of adjusting the particle size of the separated particles.

[0015] The airflow is blown from bottom to top. The faster the airflow speed, the greater the dynamic pressure and the greater the buoyancy of the air. When the buoyancy of the air is greater than the weight of the dust particles, the dust particles will be carried away by the airflow. Larger particles will continue to fall after overcoming the buoyancy, and coarse and fine particles will be separated.

[0016] The technical effects of this invention are: (1) The present invention allows the columnar flow to naturally form an umbrella-shaped material curtain that spreads in all directions, and the material curtain can be made very thin.

[0017] (2) The powder separation process of the present invention is carried out in a stationary device that is not in operation, and the operation is stable and reliable with a high operating rate.

[0018] (3) There are no difficulties in scaling up the equipment. (4) The airflow transition is smooth and the system resistance is small. Attached Figure Description

[0019] Figure 1 This is a front view of the structure of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, an umbrella-shaped material distributor includes a vertical cylinder, a feeding pipe 1, and an air inlet pipe 8. The upper end of the cylinder is closed. The air inlet pipe 8 is a curved pipe with a constant diameter. One end of the air inlet pipe 8 is connected to the lower end of the cylinder. A coarse powder collection hopper 9 is installed at the lowest point of the air inlet pipe 8. The feed inlet end of the feeding pipe 1 is located outside the cylinder, and the discharge end extends into the cylinder and is in a vertical position. A distribution plate 5 is provided at the discharge end of the feeding pipe 1 that extends into the cylinder. The distribution plate 5 is a cone with the apex pointing upward. The distribution plate 5 is coaxial with the discharge end of the feeding pipe 1 that extends into the cylinder. There is a gap between the conical surface of the distribution plate 5 and the horizontal plane where the discharge end is located.

[0022] In this invention, the cylinder is composed of three sections: the upper section is an upper cone 2 with the apex pointing upwards, the middle section is a straight cylinder 4, and the lower section is a lower cone 7 with the cone pointing downwards. The joint of the three parts is formed by angle steel and welded together. The angle steel serves both as a connecting element and as a reinforcing ring, which can save on manufacturing costs.

[0023] The feed pipe 1 is inclined and enters the cylinder from the conical surface of the upper cone 2, and the outlet of the feed pipe 1 extends vertically to the center of the straight cylinder 4. The air inlet pipe 8 is welded to the coarse powder collection hopper 9 and then connected to the lower cone 7 by a flange.

[0024] The upper cone 2 has an inspection door 3 on its side. The lower part of the outer wall of the straight cylinder 4 is welded with an annular support 6.

[0025] The periphery of the distribution plate 5 is connected to the periphery of the discharge end of the feeding pipe 1 by angle steel. The distribution plate 5 is made of steel plate, and another layer of steel plate is laid on it, which makes it easy to replace after wear.

[0026] The feed pipe 1 has 4 to 6 channel steels connected radially to the pipe wall near the discharge end. Each channel steel passes through the straight cylinder 4 and is welded to the outer wall of the straight cylinder 4. A ring of channel steel is welded to the outer wall of the straight cylinder 4 corresponding to the position where each channel steel passes through.

[0027] The embodiments described herein are merely preferred embodiments of the invention and are not intended to limit the concept and scope of the invention. Any modifications and improvements made by those skilled in the art to the technical solutions of the invention without departing from the design concept of the invention should fall within the protection scope of the invention. The technical content for which protection is sought in this invention has been fully described in the claims.

Claims

1. A device for pre-separating coarse powder, characterized in that: The device includes a vertical cylindrical body, a feeding pipe, and an air inlet pipe. The upper end of the cylindrical body is closed. The air inlet pipe is a curved pipe with a constant diameter. One end of the air inlet pipe is connected to the lower end of the cylindrical body. A coarse powder collection hopper is installed at the lowest point of the air inlet pipe. The coarse powder collection hopper is positioned towards the air inlet side of the air inlet pipe. The feeding end of the feeding pipe is located outside the cylindrical body, and the discharge end extends into the cylindrical body with a vertical opening. A distribution plate is installed at the discharge end of the feeding pipe that extends into the cylindrical body. The distribution plate is a cone with the apex pointing upwards. The distribution plate is coaxial with the discharge end of the feeding pipe that extends into the cylindrical body. There is a gap between the conical surface of the distribution plate and the horizontal plane where the discharge end is located. The powder is fed from top to bottom through the feeding pipe, impacts the distribution plate, and spreads out in all directions to form an umbrella-shaped material curtain; the airflow is provided by the blower and blows from bottom to top through the air inlet pipe; when the airflow passes through the material curtain, it carries away the fine particles in the powder, while the coarse particles fall down and flow into the coarse powder collection hopper, thus completing the separation of coarse and fine particles; the flow rate and wind speed are controlled by adjusting the blower speed to adjust the particle size of the separated particles; Specifically, below the distribution plate, airflow blows outward from the center of the device, penetrates the umbrella-shaped material curtain, and carries away fine powder and secondary coarse powder. The coarse powder falls into the air inlet pipe by gravity. This invention has only one air inlet pipe, and the coarse powder collection hopper is connected to the outside of the bottom of the air inlet pipe, which is convenient for maintenance. At the same time, its position is biased towards the air inlet side of the air inlet pipe. In this way, the coarse powder first rolls into the air inlet pipe and then falls into the coarse powder collection hopper. During the rolling process, the coarse powder rubs against the inner wall of the air inlet pipe, and the fine powder adhering to the surface falls off and is carried and separated by the airflow. The fine powder and the semi-coarse powder are collectively referred to as fine particles, and the coarse powder is coarse particles; by applying this invention, the abrasion of rotating machinery by coarse particles can be eliminated, thus ensuring equipment safety.

2. The apparatus for pre-separation of coarse powder according to claim 1, characterized in that: The cylinder is composed of three sections: the upper section is an upper cone with the apex pointing upwards, the middle section is a straight cylinder, and the lower section is a lower cone with the cone pointing downwards. The feeding pipe is inclined and enters the cylinder from the cone surface of the upper cone, and the outlet end of the feeding pipe extends vertically into the straight cylinder.

3. The apparatus for pre-separation of coarse powder according to claim 2, characterized in that: The cone surface of the distribution plate is provided with a steel plate.

4. The apparatus for pre-separation of coarse powder according to claim 2, characterized in that: The distribution plate is connected to the periphery of the discharge end of the feeding pipe by angle steel; multiple channel steels are radially connected to the pipe wall near the discharge end of the feeding pipe, and each channel steel protrudes out of the cylinder and is welded to the outer wall of the cylinder as a whole; a ring of channel steel is welded to the outer wall of the cylinder corresponding to the position where each channel steel protrudes.

5. The apparatus for pre-separation of coarse powder according to claim 2, characterized in that: The upper cone is provided with an inspection door on its side.

6. The apparatus for pre-separation of coarse powder according to claim 2, characterized in that: An annular support is welded to the lower part of the outer wall of the straight cylinder.

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