Automatic testing method for pH value of methylamine nitrate manufacturing procedure

A technology of methylamine nitrate and automatic testing, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., to achieve the effects of prolonging service life, improving accuracy and avoiding damage

Inactive Publication Date: 2015-09-30
CHINA COAL TECH & ENG GRP HUAIBEIBLASTING TECHN RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively avoids the damage of concentrated nitric acid to the electrode; at the same time, it effectively solves the problems of measurement accuracy and service life, improves the accuracy of pH value measurement, prolongs the service life of the pH meter, and automatically flushes the electrode to ensure safety.

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  • Automatic testing method for pH value of methylamine nitrate manufacturing procedure

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Embodiment Construction

[0018] A method for automatically testing the pH value in the production process of methylamine nitrate, in which a pH value online detection device 8 is installed on the neutralization tank 7, an automatic flushing device 4 is installed on the pH value online detection device 8, and the pH value is activated when the reaction is approaching the end On-line detection device 8 completes the automatic detection of pH value by pH value on-line detection device 8; completes the flushing of on-line pH meter 6 in pH value on-line detection device 8 by automatic flushing device 4 after the end of the reaction, and simultaneously removes the remaining nitric acid Methylamine rinses away, ensuring safety.

[0019] Such as figure 1 As shown, the pH value on-line detection device 8 includes a transmission assembly 1, a pusher 2 connected to the transmission assembly, a clamping device 3 connected to the pusher, an online pH meter 6 installed on the clamping device, installed on A sheath...

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Abstract

The invention discloses an automatic testing method for the pH value of the methylamine nitrate manufacturing procedure. A pH value online testing device is arranged on a neutralization tank and provided with an automatic washing device, when a reaction is close to the terminal point, the pH value online testing device is started, and automatic testing of the pH value is completed through the pH value online testing device; washing of an online pH meter in the pH value online testing device is completed through the automatic washing device after the reaction is over, residual methylamine nitrate is washed down simultaneously, and the safety is guaranteed. According to the automatic testing method for the pH value of the methylamine nitrate manufacturing procedure, manual operation can be simulated, when the reaction is close to the terminal point, the pH value automatic testing device is started, and damage of the strong acid environment is effectively avoided; meanwhile, a through hole is formed in the end, far away from a clamping device, of a protecting bush, and the problem that due to the fact that a probe of the online pH meter is exposed in the air, the measuring veracity and the service life are affected are effectively solved; the automatic washing device conducts automatic washing after the reaction is over, the residual methylamine nitrate is washed down simultaneously, and the safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for automatically testing the pH value of the methylamine nitrate manufacturing process. Background technique [0002] The manufacturing process of methylamine nitrate (also known as the neutralization process) is the process of preparing the sensitizer methylamine nitrate of water-gel explosives by neutralizing the organic weak base methylamine and the inorganic strong acid nitric acid. It is the most dangerous and most dangerous process in the production of water-gel explosives. key process. At present, there are two processes for producing methylamine nitrate. One is the process of preparing methylamine nitrate by reacting high-pressure anhydrous liquefied methylamine with 80% nitric acid represented by DuPont of the United States; the other is 40% methylamine with Chinese characteristics. The process of reacting the aqueous solution with nitric acid with a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 陆丽园杨宗玲于魏清王晓云王作鹏吴志超黄嵩
Owner CHINA COAL TECH & ENG GRP HUAIBEIBLASTING TECHN RES INST
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