Differential pressure type pneumatic powder material conveying device

Abstract

The utility model discloses a differential pressure type airflow conveying device for powder materials, which comprises a powder feeding pipe and a gas-powder mixing discharging pipe, the powder feeding pipe is embedded into the gas-powder mixing discharging pipe, and the embedding section of the gas-powder mixing discharging pipe is a high-speed airflow forming cavity; one side of the high-speed airflow forming cavity is connected with a compressed air inlet pipe, and a spiral cyclone forming channel is arranged on the inner wall of the high-speed airflow forming cavity in a winding mode. According to the device, high-speed and high-pressure spiral airflow is used for conveying powder materials, sediment materials on the pipe wall are cleaned while the materials are conveyed forwards in a spiral mode, and pipeline blockage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of differential pressure formula airflow conveying powder material's device, and specifically relates to a kind of differential pressure formula airflow conveying powder material's device. BACKGROUND

[0002] In the field of new energy, spherical nickel hydroxide material is used as the positive material of new energy battery due to its high energy density, high charge-discharge rate and good cycle performance. The production process of spherical nickel hydroxide product involves the transfer of spherical nickel hydroxide powder. After drying, the water content of the spherical nickel hydroxide powder is less than 1%, the powder has good sphericity, the rest angle is close to 0°, and the loose density is 1.6-1.8 t / m 3 Therefore, to reduce the labor intensity in the production process, it is necessary to develop a spherical nickel hydroxide powder conveying device.

[0003] Pneumatic conveying technology is a technology for conveying fine materials such as solid powder and particles through airflow. This technology is widely used in chemical, food, pharmaceutical and energy industries. Currently, the main problem restricting the development of pneumatic conveying technology is powder deposition and blockage. Factors causing powder deposition and blockage include low gas conveying pressure, high powder moisture content and large powder particle size. Therefore, Chinese utility model patent CN202321941509.7 discloses a powder conveying pipeline structure, which increases the conveying pressure by adding a side gas path to the main conveying pipeline to prevent powder particles from depositing and blocking. However, the above device needs to introduce an additional air source in actual application, which can easily cause confusion in the layout of the on-site pipeline, and there is a certain application deficiency and room for technical improvement. UTILITY MODEL CONTENT

[0004] Therefore, the utility model discloses a kind of differential pressure formula airflow conveying powder material's device, powder material is conveyed using high-speed high-pressure spiral airflow, while cleaning the deposited material on the pipe wall during spiral forward conveying, to avoid pipeline blockage.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A kind of differential pressure formula airflow conveying powder material's device, including powder feeding pipe and gas-powder mixed discharge pipe, powder feeding pipe is embedded into gas-powder mixed discharge pipe, and the embedded segment of gas-powder mixed discharge pipe is a high-speed airflow forming cavity;One side of high-speed airflow forming cavity is connected with compressed air inlet pipe, and the inner wall of high-speed airflow forming cavity is provided with spiral cyclone forming channel.

[0007] Further, to prevent high-speed airflow from forming air seal and hindering powder discharge, the bottom outlet of the powder feeding pipe is flush with or exceeds the bottom outlet of the high-speed airflow forming cavity, and an annular gap airflow outlet is formed between the bottom outlet of the powder feeding pipe and the inner wall of the gas-powder mixed discharge pipe.

[0008] Furthermore, to increase the pneumatic conveying pressure, the high-speed airflow forming cavity has a conical structure, and its diameter gradually decreases along the length of the powder feed pipe.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The high-speed airflow forming chamber contracts in diameter, and after contraction, it forms an annular airflow outlet with the lower end of the air-powder mixing discharge pipe. During the flow of compressed air, the compressed air velocity increases due to the contraction of the high-speed airflow forming chamber, and the pressure decreases in the annular airflow outlet area, forming a partial vacuum. Adsorption occurs in the annular airflow outlet area, drawing the powder material from the powder feed pipe into the air-powder mixing discharge pipe for outward transport. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] In the diagram, 1-compressed air inlet pipe, 2-powder feed pipe, 3-annular slit airflow outlet, 4-air-powder mixture discharge pipe, and 5-high-speed airflow forming chamber. Detailed Implementation

[0013] The present invention will be further explained below with reference to the accompanying drawings.

[0014] like Figure 1 As shown, a device for conveying powdered materials by differential pressure pneumatic conveying includes a powder feed pipe 2 and a gas-powder mixing discharge pipe 4. The powder feed pipe 2 is embedded in the gas-powder mixing discharge pipe 4, and the fitting section of the gas-powder mixing discharge pipe (4) is a high-speed airflow forming chamber 5. A compressed air inlet pipe 1 is connected to one side of the high-speed airflow forming chamber 5, and a spiral cyclone forming channel is provided on the inner wall of the high-speed airflow forming chamber 5. The high-speed airflow forming chamber 5 has a conical structure, and its diameter gradually decreases along the length of the powder feed pipe 2.

[0015] The bottom outlet of the powder feed pipe 2 is flush with or exceeds the bottom outlet of the high-speed airflow forming chamber 5, and an annular airflow outlet 3 is formed between the bottom outlet of the powder feed pipe 2 and the inner wall of the air-powder mixing discharge pipe 4.

[0016] Compressed air enters the high-speed airflow forming chamber 5 through the compressed air inlet pipe 1. Inside the high-speed airflow forming chamber 5, it flows along the circular pipe wall to form an annular airflow. During the flow, the compressed air velocity increases due to the contraction of the pipe diameter of the high-speed airflow forming chamber 5. The pressure decreases outside the annular airflow outlet 3 area, and a negative pressure adsorption effect is generated in the annular airflow outlet 3 area at the narrowest position of the high-speed airflow forming chamber 5. The powder material in the powder feed pipe 2 is adsorbed and enters the air-powder mixing discharge pipe 4. The powder material is further transferred to the receiving silo through the pipeline.

[0017] When installed, the upper end flange of the powder feeding pipe 2 is connected with the star-shaped discharger of the site feeding bin outlet, and the lower end flange of the powder discharging pipe 4 can be connected with the site feeding pipe to achieve long-distance transfer of powder materials to meet the process requirements and reduce labor intensity.

Claims

1. An apparatus for conveying a powder material by pressure differential gas flow, characterized by It comprises a powder feeding pipe (2) and a gas-powder mixing outlet pipe (4), the powder feeding pipe (2) is embedded in the gas-powder mixing outlet pipe (4), and the embedded section of the gas-powder mixing outlet pipe (4) is a high-speed airflow forming cavity (5); one side of the high-speed airflow forming cavity (5) is connected with a compressed air inlet pipe (1), and the inner wall of the high-speed airflow forming cavity (5) is provided with a spiral cyclone forming channel.

2. A device for conveying powder material by differential pressure induced gas flow as claimed in claim 1, wherein, The bottom outlet of the powder feeding pipe (2) is flush with or exceeds the bottom outlet of the high-speed airflow forming cavity (5), and an annular gap airflow outlet (3) is formed between the bottom outlet of the powder feeding pipe (2) and the inner wall of the gas-powder mixing outlet pipe (4).

3. The apparatus of claim 1 wherein, The high-speed airflow forming cavity (5) is in a conical structure, and the diameter gradually decreases along the length direction of the powder feeding pipe (2).

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