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Liquid electrostatic safety testing device and method based on spraying process

An electrostatic safety and injection process technology, which is used in measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of leakage of liquid hydrocarbon mixed vapor, no report, explosion, etc., to achieve convenient maintenance, safe and reliable use, volume big effect

Active Publication Date: 2020-03-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2000, due to the presence of weld seams in the welding of an ethylene oxide metering tank in Weinan, Shaanxi Province, liquid ethylene oxide was ejected at a high speed under the pressure of 0.2-0.3 MPa in the metering tank, and caused an explosion due to frictional electrification with the weld seam; Lanzhou Petrochemical "6 28” explosion accident (2006)——When the maintenance personnel installed the E-507 condenser head cover, they did not remove the plastic film wrapped around the wave-tooth gasket. The tooth pads generate static electricity and accumulate, discharge with the tank wall to cause the explosion of the leaked liquid hydrocarbon mixed vapor, causing a fire
Therefore, it is very important to design an oil electrostatic safety test method based on the liquid injection (splash) process, but there is no report on the oil electrostatic safety test method or device for the liquid injection (splash) process

Method used

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  • Liquid electrostatic safety testing device and method based on spraying process
  • Liquid electrostatic safety testing device and method based on spraying process
  • Liquid electrostatic safety testing device and method based on spraying process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A liquid static electricity safety testing device based on a spraying process includes a test auxiliary platform, a liquid spraying simulation system and a liquid static electricity electrification measurement system.

[0039] Such as figure 1 As shown, the test auxiliary platform includes a high-pressure nitrogen cylinder 1, a pressure reducing valve 2, a first pressure gauge 4, a closed storage tank 5, an explosion-proof frequency conversion pump 7, a filter 8, a flow meter 10 and a second pressure gauge 11, and the high-pressure nitrogen cylinder 1. The pressure reducing valve 2, the first pressure gauge 4 and the airtight storage tank 5 are sequentially connected through a gas pipe, and a valve I3 is provided between the pressure reducing valve 2 and the airtight storage tank 5. The airtight storage tank 5, the explosion-proof frequency conversion pump 7, the filter 8, the flow meter 10 and the second pressure gauge 11 are sequentially connected through pipelines to...

Embodiment 2

[0051] On the basis of the above-mentioned embodiments, in addition, the present invention also discloses a liquid electrostatic safety testing method based on the spraying process, which is carried out according to the following steps:

[0052] Step 1: the liquid to be tested is contained in the airtight storage tank 5, and the airtight storage tank 5 is sealed by using a flange blind plate;

[0053] Step 2: Open the high-pressure nitrogen cylinder 1 and valve I3, adjust the pressure reducing valve 2 and control the pressure inside the airtight storage tank 5 according to the first pressure gauge 4;

[0054] Step 3: Open the valve II6 between the airtight storage tank 5 and the explosion-proof frequency conversion pump 7, close the valve III13 and valve IV14, and use the power provided by the explosion-proof frequency conversion pump 7 to realize the flow of liquid along the pipeline;

[0055] Step 4: remove impurities in the test liquid through a filter 8;

[0056] Step 5: ...

Embodiment 3

[0060] On the basis of the above-mentioned embodiment 1, in addition, the present invention also mentions a liquid electrostatic safety testing method based on the liquid splashing process, which adopts the above-mentioned liquid electrostatic safety testing device based on the liquid spraying process, as follows Steps to simulate the charging characteristics of oil splash in the storage tank:

[0061] Step 1: According to Embodiment 1, the top cover of the airtight storage tank 5 is transformed, and the top cover of the airtight storage tank 5 is opened, and the monitoring equipment for monitoring the electric field or liquid level potential in the airtight storage tank 5 is installed;

[0062] Step 2: repeat step 1-step 6 in embodiment 2;

[0063] Step 3: Use the explosion-proof frequency conversion pump 7 to adjust different flow rates, use the oil charge density meter 12 to record the charge density of the liquid entering the closed storage tank 5, and use the electric fie...

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Abstract

The invention discloses a liquid static electricity safety testing device and method based on a spraying process. The testing device comprises a testing auxiliary platform, a simulation system and a liquid static electricity electrification measuring system. The simulation system comprises a jet orifice simulation device and a closed storage tank internal splashing simulation device, and the liquid electrostatic electrification measurement system comprises an oil product charge density meter which is installed on the test auxiliary platform and used for testing the liquid charge density of a circulation loop, a Faraday cylinder net with two open ends and leakage current test equipment. The simulation testing device has the advantages of being simple in structure, convenient to install andmaintain, capable of being installed far away from flammable and explosive places, safe and reliable to use and capable of monitoring the electrostatic charge density of the oil product in real time and researching electrostatic discharge risks existing in pipeline transportation, liquid splashing in the storage tank and liquid leakage spraying in the oil product storage and transportation process.

Description

technical field [0001] The invention belongs to the field of electrostatic electrification simulation testing of oil products, and in particular relates to a liquid electrostatic safety testing device and method based on a spraying process. Background technique [0002] Electrostatic discharge is one of the key factors that cause major accidents such as fires and explosions of flammable materials. Liquids (oil, water, Firefighting foam, etc.) is charged due to flow, splashing, atomization, etc., forming a "charge cloud (charged cloud)", and even electrostatic discharge ignition accidents. In 2000, due to the presence of weld seams in the welding of an ethylene oxide metering tank in Weinan, Shaanxi Province, liquid ethylene oxide was ejected at a high speed under the pressure of 0.2-0.3 MPa in the metering tank, and caused an explosion due to frictional electrification with the weld seam; Lanzhou Petrochemical "6 28” explosion accident (2006)——When the maintenance personne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/60
CPCG01N27/60
Inventor 孙立富李亮亮李义鹏宫宏孟鹤蒲鹤
Owner CHINA PETROLEUM & CHEM CORP
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