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Explosion limit testing device for non-volatile liquid and application of explosion limit testing device

A technology of explosion limit and testing device, which is applied in the direction of material explosion, and can solve the problems of inaccurate test results and low degree of automation

Inactive Publication Date: 2021-07-06
应急管理部化学品登记中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the problem of inaccurate test results and low degree of automation in the prior art. A new explosive limit test device for difficult-to-volatile liquids is provided, which has the advantages of accurate test results and high degree of automation

Method used

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  • Explosion limit testing device for non-volatile liquid and application of explosion limit testing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A device for testing the explosion limit of difficult-to-volatile liquids, such as figure 1 As shown, it consists of four parts: digital control system, temperature control test system, ignition observation system, and vacuum intake system.

[0021] 1. The composition of each system:

[0022] Digital control system: CNC operation panel, pressure sensor, thermocouple, solenoid valve, liquid level sensor, etc.

[0023] Temperature control test system: sampling room, evaporation room, experimental flask, temperature control thermocouple, heating room, heat insulation and explosion-proof room, etc.

[0024] Ignition observation system: spark igniter, ignition controller, observation window, etc.

[0025] Vacuum intake system: air intake pipe, vacuum pump, air connection pipe, etc.

[0026] 2. The connection relationship of each component:

[0027] The sampling chamber, evaporation chamber, experimental flask, and vacuum pump are connected through connecting sleeves, and...

Embodiment 2

[0040] According to the conditions and steps described in Example 1, the device was used in the explosion limit test of absolute ethanol.

[0041] 1. If figure 1 Connect the device as shown, open the numerical control operation panel, set the test temperature to 50°C and the injection concentration to 3kPa. Solenoid valves 2 and 3 are automatically opened, and the vacuum pump is started to vacuumize, and this is repeated at least 3 times.

[0042]2. After the vacuuming is completed, add at least 250ml of ethanol sample into the sampling chamber, close the solenoid valves 2 and 3 and the vacuum pump, and open the solenoid valve 1 to allow the ethanol sample to flow into the evaporation chamber. When the liquid volume reaches 200ml, the electromagnetic valve 1 is closed. The heating device and the stirrer are started.

[0043] 3. When the temperature in the evaporation chamber and the experimental flask reaches 30°C and is stable for at least 5 minutes, the solenoid valve 2 i...

Embodiment 3

[0053] According to the conditions and steps described in Example 1, the device was used in the explosion limit test of acrylic varnish.

[0054] 1. If figure 1 Connect the device as shown, open the numerical control operation panel, set the test temperature to 100°C and the injection concentration to 1kPa. Solenoid valves 2 and 3 are automatically opened, and the vacuum pump is started to vacuumize, and this is repeated at least 3 times.

[0055] 2. After the vacuuming is completed, add at least 250ml of acrylic varnish sample into the sampling chamber, close the solenoid valves 2 and 3 and the vacuum pump, and open the solenoid valve 1 to allow the acrylic varnish sample to flow into the evaporation chamber. When the liquid level detector detects When the amount of liquid in the evaporation chamber reaches 200ml, the solenoid valve 1 is closed. The heating device and the stirrer are started.

[0056] 3. When the temperature in the evaporation chamber and the experimental ...

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Abstract

The invention relates to an explosion limit testing device for non-volatile liquid and application of the explosion limit testing device, and mainly solves the problems of inaccurate testing result and low automation degree in the prior art. The explosion limit testing device for the non-volatile liquid comprises a digital control system, a temperature control testing system, an ignition observation system and a vacuum air inlet system, and the digital control system comprises a numerical control operation screen, a pressure sensor, a thermocouple, an electromagnetic valve and a liquid level sensor. The temperature control test system comprises a sample introduction chamber, an evaporation chamber, an experiment flask, a temperature control thermocouple, a heating chamber and a heat insulation explosion-proof chamber, the ignition observation system comprises an electric spark igniter, an ignition controller and an observation window, and the vacuum air inlet system comprises a vacuum pump.

Description

technical field [0001] The invention relates to a device for testing the explosion limit of a low-volatility liquid and its application, which is used for testing the explosion limit of the low-volatility liquid, viscous liquid and liquid (steam) which cannot be sampled by conventional injection methods in air. Background technique [0002] Combustible substances (combustible gas, steam and dust) and air (or oxygen) must be uniformly mixed within a certain concentration range to form a premixed gas, and an explosion will occur when a fire source is encountered. This concentration range is called the explosion limit, or the explosion concentration range . For example, the explosion limit of ethanol vapor mixed with air is 3.3% to 19.0%. The lowest concentration and the highest concentration at which a flammable mixture can explode are called the lower explosion limit and the upper explosion limit, which are sometimes also called the lower ignition limit and the upper ignitio...

Claims

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Application Information

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IPC IPC(8): G01N25/54
CPCG01N25/54
Inventor 张䶮霍明甲王双全
Owner 应急管理部化学品登记中心