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Fixed fluidized bed powder metering and distributing delivery device and methed of realizing high stability transferring and distributing powder

A technology of fixed fluidized bed and fluidized gas, which is used in the transportation of bulk materials, conveyors, transportation and packaging, etc. It can solve the problem of stable powder metering, transportation and storage difficulties, inaccurate powder metering with small flow, and powder distribution. problems such as poor body uniformity, to achieve the effect of reducing equipment investment and maintenance workload, high gas-solid ratio, and low flow velocity

Inactive Publication Date: 2006-06-14
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particle shape of powder materials, the state of particle aggregation and the surface shape of powder materials, the physical properties of the powder are shifted between solid and liquid, making it difficult to measure, transport and store the powder stably.
[0003] Experts and scholars at home and abroad have done a lot of experiments and research on powder dense phase transportation, but few articles have been published on the stability and continuity of powder dense phase transportation. The metering, distributing and conveying equipment of powder are often studied and discussed separately. In the prior art, there have always been problems such as large instantaneous flow fluctuations, inaccurate metering of small flow powders, and poor uniformity of distributed powders in powder dense phase transportation.

Method used

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  • Fixed fluidized bed powder metering and distributing delivery device and methed of realizing high stability transferring and distributing powder

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0044] Application of thermal plasma pyrolysis coal direct production of acetylene powder feeding device

[0045] (1) Put the pulverized coal into a fluidized tank with a diameter of φ500mm, and the computer control system sets Q1=60NM 3 / h;

[0046] Q2=10NM 3 / h; Powder feeding amount = 2500kg / h; Stirring speed = 200 rpm; The speed of the feeder is automatically fed back to the material level of the fluidized tank. Fluidizing gas Q1 and accelerating gas Q2 are nitrogen

[0047] (2) The diameter of the powder feeding pipe is φ6mm, the length of the powder feeding pipe is 10m, and 4 powder feeding pipes supply powder to a plasma reactor at the same time.

[0048] (3), the computer control system sets the powder feeding amount = 2500kg / h;

[0049] (4) The pressure of the plasma reactor is 0.05-0.2Mpa, and the temperature is 1800-3000°C.

[0050] Results: The actual powder feeding volume is 2450kg / h, the speed of powder particles entering the plasma reactor is 28m / s, and the...

example 2

[0052] Application of powder feeding device in plastic processing industry

[0053] (1), 10 sets of plastic extrusion molding machines, the amount of plastic powder needed for each set is different, and the time for using plastic powder is different. The current process is that each plastic extrusion molding machine has a set of powder metering and conveying equipment.

[0054] (2) Adopt a powder fluidized feeding device with a diameter of φ1000mm, the fluidized gas Q1 is air, and the computer control system sets Q1=100NM 3 / h; stirring speed = 200 rpm; the speed of the feeder is automatically fed back to the material level of the fluidized tank. Connect 10 powder feeding pipelines with different diameters and lengths on the side of the fluidized tank (design according to the position of each plastic extruder and the amount of plastic powder required).

[0055] (3) The computer control system sets Q1; the stirring speed; the speed of the feeder is automatically fed back to t...

example 3

[0059] Adding nano-calcium carbonate powder during the reaction of polyvinyl chloride

[0060] (1) Adding nano-calcium carbonate powder in the PVC reaction process can enhance the strength of plastic products and reduce costs. The current process is to disperse the nano-calcium carbonate powder in the water phase, and then use a high-pressure water pump to drive it into a polymerization kettle with a pressure of 0.8Mpa. Since the nano-calcium carbonate powder is lipophilic particles, it is difficult to disperse in the water phase, so it is necessary to add surface activity. The agent and dispersing pump run for a long time, which has the following disadvantages:

[0061] a. Surfactants are likely to cause adverse side effects;

[0062] b. The dispersing pump runs for a long time, so that the nanoparticles grow up and lose the effect of increasing the strength of plastic products.

[0063] Using vinyl chloride gas as the dispersion medium can solve the above problems well.

...

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Abstract

The present invention discloses a fixed fluidized bed powder body metering, distributing and conveying equipment and method for implementing high-stable conveyance and distribution of powder body. Said invention includes the following several components: fluidizing tank, powder body feeding pipe, gas feeding pipe, powder body level indicator, fluidized gas distributor, mechanical stirring paddle and power-conveying pipeline, etc. Besides, said invention also provides its extensive application fields.

Description

technical field [0001] The invention belongs to powder metering, distributing and conveying technology and device in powder engineering. Background technique [0002] Powder material is an intermediate state between solid and liquid. Some people call it the fourth state of matter besides solid, liquid and gas. In view of its special physical properties, it has developed into a special discipline of powder engineering, starting with the testing, processing and measurement of powder, as well as its mechanics, optics, and acoustics. Due to the particle shape of powder materials, the state of particle aggregation and the surface shape of powder materials, the physical properties of powder are shifted between solid and liquid, making it difficult to measure, transport and store powder stably. [0003] Experts and scholars at home and abroad have done a lot of experiments and research on powder dense phase transportation, but few articles have been published on the stability and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65G53/16B65G53/40B65G53/52B65G53/66
Inventor 熊新阳孟月东
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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