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Method for preventing burning explosion of low-carbon hydrocarbon and application thereof

A low-carbon hydrocarbon and reaction gas technology, which is applied to chemical instruments and methods, purification/separation of hydrocarbons, explosive materials, etc., can solve the problems of not effectively prolonging the induction time of spontaneous combustion to prevent explosion, personal injury, equipment damage, etc., to achieve Prolong the induction time of spontaneous combustion, avoid equipment damage, and avoid the effect of explosion

Pending Publication Date: 2022-06-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical problems of not effectively prolonging the induction time of spontaneous combustion and preventing the explosion of low-carbon hydrocarbons in the prior art, and the technical problems of equipment damage and personnel injury caused by excessive temperature and pressure after explosion, and to provide a Method and application for preventing low-carbon hydrocarbons from detonating

Method used

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  • Method for preventing burning explosion of low-carbon hydrocarbon and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] First, methane enters the buffer tank through the feed line, and oxygen enters the buffer tank through the feed line. The molar ratio of oxygen and methane is 1:2. After the temperature rises to about 500 °C in the buffer tank, it passes through the column. The plug pump is driven into the gas explosion test device. According to the heating rate of 10°C / min, the temperature of the explosion test device is raised to 800°C and the pressure is 1 bar. Through the gas explosion test device, 1 bar is obtained. At 800°C, the methane The self-ignition induction time of the gas is T 0 , and then flush N into the flash tank through the gas distribution feed line 2 , according to the amount of nitrogen flushed, the volume concentration of methane is diluted to 0.9, 0.8, 0.7, 0.6, 0.5, and then a series of concentration gradients of methane and N 2 The mixed gas was passed into the gas explosion test device, and the spontaneous combustion induction time T of methane at different v...

Embodiment 2

[0060] The natural induction time test of low-carbon hydrocarbons was carried out according to the method of Example 1, except that methane was replaced by ethane.

[0061] test experiment

[0062] In the mixture of ethane, oxygen and nitrogen, the volume concentration of ethane is 0.15, and the result obtained by fitting the above method at 800 °C and a pressure of 1 bar is the sum of the self-ignition induction time T of ethane and the concentration of ethane. The relationship equation between: T=a 1 m x T 0 +b 1 mT 0 +c 1 , the self-ignition induction time of ethane in the mixture is 130ms, and then, under the condition of 800 ° C and 1 bar, the volume concentration of ethane in the mixture of ethane, oxygen and nitrogen is controlled to be 0.15, at this time, x is 2.15. The test found that no explosion occurred when the oxidation reaction time was 110ms, 115ms, 120ms and 125ms, and when the oxidation reaction time was controlled to 130ms, explosion occurred.

Embodiment 3

[0064] The natural induction time test of low-carbon hydrocarbons was carried out according to the method of Example 1, except that methane was replaced by ethylene.

[0065] test experiment

[0066] In the mixture of ethylene, oxygen and nitrogen, the volume concentration of ethylene is 0.18, and the relationship equation between the self-ignition induction time T of ethylene and the concentration of ethylene at 800 °C and a pressure of 1 bar obtained by fitting the above method : T=a 1 m x T 0 +b 1 mT 0 +c 1 , the self-ignition induction time of ethylene in the mixture is 120ms, and then, at 800 ° C and the pressure of 1 bar, the volume concentration of ethylene in the mixture of ethylene, oxygen and nitrogen is controlled to be 0.18, at this time, x is 2.52 , the test found that when the oxidation reaction time was 100ms, 105ms, 110ms and 115ms, no explosion occurred, and when the oxidation reaction time was controlled to 120ms, explosion occurred.

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Abstract

The invention relates to the field of safety production, and discloses a method for preventing burning explosion of low-carbon hydrocarbon, which comprises the following steps: heating mixed gas consisting of oxygen and low-carbon hydrocarbon, and measuring spontaneous combustion induction time T0 of the low-carbon hydrocarbon at a first temperature and a first pressure; the method comprises the following steps: diluting a mixed gas by using an inactive gas to obtain n diluted reaction gases with different concentrations of low-carbon hydrocarbons, measuring spontaneous combustion induction time T1-Tn of the low-carbon hydrocarbons in the n diluted reaction gases at a first temperature and a first pressure, and respectively substituting T1-Tn into a formula T = a1mxT0 + b1mT0 + c1 to obtain specific numerical values of x, a1, b1 and c1, n is an integer greater than or equal to 4, and m is the volume concentration of the low-carbon hydrocarbon in the dilution reaction gas.

Description

technical field [0001] The invention relates to the field of safe production, in particular to a method for preventing low-carbon hydrocarbons from detonating and application thereof. Background technique [0002] The self-ignition induction time refers to the delay time for the self-ignition of the combustible gas under a certain initial temperature condition. Spontaneous ignition induction time is one of the important parameters of gas, especially with the progress of chemical industry in recent years, many industrial production processes will involve the mixing and reaction of combustible gases far higher than normal temperature conditions, so master and rational use of combustible gases The high self-ignition induction time helps to improve the safety level of the related process and ensure the safety of the chemical process. The self-ignition process involves high temperature and short time. At present, the self-ignition induction time of low-carbon hydrocarbons at dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/54C07C7/20C07C11/04C07C11/06
CPCG01N25/54C07C7/20C07C11/04C07C11/06
Inventor 马守涛姜杰孙峰杨哲徐伟冯俊杰
Owner CHINA PETROLEUM & CHEM CORP
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