Conical surface discharge test method for powder bin

A discharge test, powder technology, applied in the direction of measuring electricity, measuring electrical variables, testing dielectric strength, etc., can solve the problems of poor safety, explosion, etc., and achieve the effect of performance improvement and good technical effect

Inactive Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the conical surface discharge in the prior art is easy to cause explosi...

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  • Conical surface discharge test method for powder bin

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Embodiment 1

[0018] A powder silo cone surface discharge test method, such as figure 1 As shown, the determination of the minimum ignition energy MIE of the powder is determined. After inquiry, the minimum ignition energy of the polyethylene powder is 10mJ; the maximum energy W of the powder discharge in the cone surface of the silo is calculated: the diameter of the ground silo is 3m, and the accumulated powder The median diameter of the silo is 0.1mm, and the maximum energy of the cone surface discharge is calculated to be 2.42mJ; the minimum radius of the cone surface discharge of the powder in the silo is determined: according to the calculation method of the safe material level, the safe material level of a polyethylene silo is 1.75m, that is, the radius of 1.01m is the minimum radius of the conical surface discharge of the silo. According to the above data, for a grounded silo with a diameter of 3m, polyethylene powder with a median diameter of 0.1mm can be selected for testing; the ...

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Abstract

The invention relates to a conical surface discharge test method for a powder bin, which mainly solves the problems of easy explosion and poor safety caused by conical surface discharge in the prior art. The conical surface discharge test method for the powder bin comprises the following steps of: determining minimum ignition energy MIE of powder, calculating a maximum energy W of the conical surface discharge of the powder in a bin, calculating a minimum radius r of the conical surface discharge of the powder in the bin, and determining a relation among the MIE, the W and the r; wherein the minimum ignition energy MIE of the powder is obtained by an inquiry or a test; a calculation formula of the maximum energy W of the conical surface discharge of the powder in the bin is W=5.22D2.36d1.46, wherein D is a diameter of a grounding bin, m; and d is a median diameter of stacked powder, mm. According to the technical scheme, the minimum radius r of the conical surface discharge of the powder in the bin is calculated through a safety material level gauge, so that the problem is better solved, and the method can be used for the conical surface discharge test of the powder bin.

Description

technical field [0001] The invention relates to a test method for conical surface discharge of a powder silo. Background technique [0002] The powder silo is the storage silo used to store and transfer powder and granular materials in the production process of the enterprise, such as the main equipment for storing polyethylene, polypropylene, polystyrene powder and granular materials. For example, in the production process of polyolefins, high-insulation combustible powder particles are transported by wind, crushed, screened, stirred and separated to generate static electricity, and accumulate in the silo, so that the potential of the powder in the silo can be in the silo. Above 40kV. Therefore, the electrostatic explosion in the powder silo has always been a hot spot in disaster prevention research at home and abroad. [0003] Electrostatic discharge is an important ignition source that causes powder explosion in silo, and cone discharge is its main form. Simulating the...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/00
CPCG01R31/1263G01R31/001
Inventor 孙立富李亮亮高鑫宫宏李义鹏孟鹤
Owner CHINA PETROLEUM & CHEM CORP
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