According to the CCTV News client, at around 9 am on January 11, a flashover incident occurred in the space of the sewage treatment tank inside the Xiamen Jindawie Vitamin Co., Ltd. in Haicang District, Xiamen City. The accident caused 3 construction workers to die and 3 others to be injured and sent to the hospital for treatment. The preliminary investigation showed that the sudden flare-up of combustible gas in the space of the sewage treatment tank occurred during the installation of a sunshade shed above the tank by the company, resulting in the collapse of the sewage treatment tank and the sunshade shed above it. The specific cause of the accident is still under further investigation.

What is flashover?

Flashover is a kind of explosion that occurs when flammable gas accumulates in a space with poor air circulation to a certain concentration, and then explodes immediately when it encounters an open flame or spark. In general, it only causes a one-time explosion, but if the flammable gas can be replenished in time, it may cause multiple explosions.

The scenarios of wastewater treatment plants, which are highly prone to produce toxic and harmful gases such as methane and hydrogen sulfide, can adopt fixed reflection laser gas remote sensors with multiple gas detection functions to cover the areas that need to be monitored through networking. For the limited space of this kind of wastewater treatment plant, IoT laser gas leak detection sensors can be set up.

Fixed reflection laser gas remote sensors

Hanhai Optical's fixed reflection laser gas remote sensors have integrated transceivers and can detect gases up to a distance of 1 km. Unlike traditional detection modes that rely on passive waiting, these sensors actively monitor leakage risk points. With a response time of only 1 second, they can accurately detect trace leaks at ppm levels. This truly enables preventive monitoring of gas leaks. Compared to traditional detectors that are easily affected by environmental and cross-gas factors, these sensors have strong anti-interference capabilities. They have fingerprint detection, achieving zero false positives. The products require no calibration, saving operational costs throughout their lifecycle. Besides hydrogen sulfide, they can also detect multiple gases such as methane, ethylene, acetylene, carbon monoxide, carbon dioxide, and ammonia. They comply with the national standard GB/T 50493-2019.

Internet of Things (IoT) laser gas leak detection sensors