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Fluidized continuous micro-feeding device

A technology of feeding device and fluidized state, which is applied in the field of continuous micro-feeding device in fluidized state, can solve the problems of small feeding amount, etc., and achieve enlargement of device size, precise control of feeding stability and accuracy, and feeding The effect of convenient size adjustment

Active Publication Date: 2012-03-28
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of laboratory research, quantitative, stable and accurate feeding is often required, and the feeding amount is very small, especially the feeding rate as small as 0.1g / min or below, which cannot be satisfied by ordinary micro-feeding devices. these needs

Method used

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  • Fluidized continuous micro-feeding device
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Examples

Experimental program
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Effect test

example 1

[0024] A micro-powder feeding device is manufactured according to the above principles and implementation methods. Motor 1 uses a stepper motor, which can precisely adjust the motor speed. The length of the connecting rod 3 is 60mm, and there is a circular groove in it, which is used to block the injection pipe 5. The length of the injection pipe 5 is 140mm, and the inner diameter of the upper air inlet is 6mm. The inner diameter of the lower end face is 6mm. Outlet pipe 4 has an outer diameter of 3mm and an inner diameter of 1mm. The discharge pipe 4 exposes 2mm of the lower end surface of the injection air pipe 5 . Stock pipe 7 internal diameters are 30mm, and length is 120mm. Micro-powder feeding experiment was carried out with the above-mentioned device. The bulk density of selected coal is about 900Kg / m 3 , the particle size is 74-105 μm, the quality of putting into the material storage pipe 7 is about 30g, the gas flow rate of the inlet pipe is set so that the air ...

example 2

[0027] According to the same principle, increase the size of the device and change the motor speed. Then change the pulverized coal of big particle size such as 400-600 μ m, put into the amount of material in the storage pipe 7 to be about 100g, set the air flow rate injected into the air pipe 5 so that the air flow in the storage pipe 7 is 3L / min, This allows the coal to reach a fluidized state. Control the advancing speed of the injection air pipe 5 with the motor speed to make the powder feeding stable and measure the powder feeding rate with a balance to be 2g / min. Powder feed rates can vary and vary widely.

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Abstract

The invention provides a fluidized continuous micro-feeding device. The device comprises a motor, a screw, a linkage rod, a discharge pipe, an air supply injection pipe, a piston and a material storage pipe, wherein, the piston is fixedly connected with the air supply injection pipe and can slide up and down in the material storage pipe; the lower end of the screw is connected with an output shaft of the motor; the upper end of the air supply injection pipe is connected with the screw through the linkage rod so that the air supply injection pipe can slide up and down with the rotation of the screw; a tubular air inlet is arranged at the upper end of the air supply injection pipe, and an annular air outlet is arranged at the lower end of the air supply injection pipe; and the discharge pipe is fixedly connected with the air supply injection pipe, and the lower end of the discharge pipe extends out of the lower end surface of the air supply injection pipe. The fluidized continuous micro-feeding device has the advantages that materials are fluidized and carried by virtue of air flow so as to realize continuous micro-feeding; the materials are pushed by the motor and the screw so as to achieve good stability and accuracy; when airflow is fixed, the distance between the discharge pipe and the materials keeps constant, and the feeding speed is controlled according to the rotating speed of the motor; and the device is applicable to both powdered solid and granular solid, thus meeting the requirements of lab application.

Description

technical field [0001] The invention belongs to the technical field of pulverized coal, biomass and waste combustion, and relates to the micro-feeding of pulverized coal and biomass combustion and waste incineration research, and is also applicable to other dry powdery and granular solids, specifically A fluidized continuous micro-feeding device. Background technique [0002] In the research work on the combustion and gasification of pulverized coal or biomass and other materials in the laboratory, it is necessary for the powder feeding device to achieve a small amount of continuous, uniform and stable delivery of materials to ensure the smooth progress of the experiment. According to the current principle of powder feeding, micro powder feeding devices can be divided into mechanical type, pneumatic type, compound type and special vibration type, etc. However, due to the characteristics of these devices, the minimum conveying material rate is generally above 1g / min [Fu Guom...

Claims

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Application Information

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IPC IPC(8): B65G53/16
Inventor 陈超姚洪罗光前刘伟王静李园方欣
Owner HUAZHONG UNIV OF SCI & TECH