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Rika Sensor is a weather sensor manufacturer and environmental monitoring solution provider with 10+ years of industry experience.

Why do coal mine accidents happen frequently? Analysis on the application of carbon monoxide sensor in coal production

by:Rika Sensors     2021-11-30
Why do coal mine accidents happen frequently? Analysis on the application of carbon monoxide sensor in coal production
In recent months, coal mine accidents have occurred frequently, and they are all relatively large accidents. Many families were torn apart. While these accidents are regrettable, they are also thought-provoking. Why do coal mine accidents happen frequently in our country?

A comprehensive analysis of several recent accidents shows that the accidents mainly occurred in small coal mines and were mainly caused by 'man-made disasters'. Take the Chongqing Yongchuan Diaoshuidong Coal Mine as an example. It had been shut down for more than two months. Later, the company dismantled underground equipment by itself, and an accident of carbon monoxide exceeding the limit occurred.

The carbon monoxide in coal mines is mainly the gas produced by the oxidation of underground coal seams. The coal mine safety regulations stipulate that the concentration of carbon monoxide in the air of coal mines shall not exceed 0.0024%, and the common unit is PPM. According to regulations, the concentration of carbon monoxide in the mine cannot exceed 24PPM. After the accident, the concentration of carbon monoxide in the Diaoshuidong coal mine was as high as 1700PPM, which was nearly 71 times the prescribed value of 24PPM.

Carbon monoxide is colorless, odorless, and tasteless. It is easily combined with hemoglobin to form carboxyhemoglobin, which makes hemoglobin lose the ability and role of carrying oxygen, causing suffocation of human tissues and death in severe cases. Carbon monoxide has toxic effects on tissues and cells throughout the body, especially the cerebral cortex. When the carbon monoxide in the air reaches 0.05%, people are at risk of poisoning. When the carbon monoxide concentration in the air reaches 0.5% to 1%, it may cause death within 5 minutes.

Excessive carbon monoxide is more common in coal mines. Excessive carbon monoxide is mainly due to the spontaneous combustion of coal oxidized, fires in coal mines, or coal dust explosions in coal mines. In addition, in the mining process of coal mines, when blasting is carried out, the carbon monoxide in the coal mine will exceed the standard. Therefore, the monitoring of carbon monoxide content is particularly important.

The carbon monoxide sensor is a sensor based on the electrochemical principle. It has the characteristics of rapid and sensitive response and strong anti-interference ability. After a unique compensation algorithm and multi-stage standard gas calibration, it also has a long life, high precision, high repeatability and high The characteristics of stability are also of great significance for reducing accidents and effectively guaranteeing coal mine safety production and the life safety of miners.

In order to be suitable for different industrial scenarios, the carbon monoxide sensor range is available in 0-1000ppm (default) and 0-2000ppm. Other ranges can also be customized; the measurement accuracy is high, up to ± Within 3% FS, repeatability can reach within 2%; optional high-quality OLED display, the value can be directly viewed on site, and can be clearly displayed at night; especially in the case of poor ventilation, when the gas leaks to 150ppm, start When harming the human body, the carbon monoxide transmitter will give an alarm and send the detected value to the mine environment monitoring cloud platform for data processing, so that managers can keep track of the concentration of carbon oxide gas in the mine at any time to ensure safe production in the coal mine.

The mine environment monitoring cloud platform is a web login platform specially developed to provide users with the most convenient service. The cloud platform is deployed on the public network server, which can easily access all the network equipment of our company. Customers no longer need to set up servers by themselves, save server maintenance costs, and do not need to have public IP or domain name resolution services. After the equipment arrives on site, users can connect to the cloud platform without complicated network settings, which greatly saves on-site construction time. The company promises that the cloud platform is free to use, the interface is completely neutral, supports multi-level permission access, and supports customers to add sub-accounts. Customers can log in with their account anytime and anywhere to conveniently check their own device status, query data records, download and print data, etc., and can also choose SMS alarms, email alarms and other services according to their needs. The platform is stable and reliable, and the number of connected devices exceeds 10,000. .

For the convenience of use, in addition to the conventional carbon monoxide sensor housing of the Prince Shell, a handheld gas monitor can also be provided. The appearance is small and it can be held in the hand or placed in the pocket at will for gas measurement anytime, anywhere . Integrated methane, carbon monoxide, oxygen, hydrogen sulfide and other sensors are used to monitor various parameters in the mine. Once the data exceeds the limit, the handheld gas monitor will sound an alarm to remind people to stay away from dangerous environments. The product can store up to 130,000 test data, and the historical data can be checked at any time with the software. The product is easy to use and maintain, and meets the requirements of high-reliability equipment for industrial site safety monitoring. The shell is made of high-strength engineering plastics and composite non-slip rubber, which has high strength, good hand feeling, and is waterproof and dustproof.

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