At 12:40 am on September 28, a restaurant in the Changchun high-tech zone in Jilin province exploded and burned, killing 17 people and injuring three others, according to@china Fire Service Weibo.

https://weixin.qq.com/sph/A8nwwU

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An on-site investigation by the accident investigation team and a Public Security Bureau investigation preliminarily concluded that the accident was caused by the explosion and combustion caused by the leakage of the bottled Liquefied petroleum gas.

Article thirty-six of the new work safety law clearly stipulates that “If a production or business unit in the catering industry uses fuel gas, it shall install a fuel gas alarm device and ensure its normal use.”

Driven by the requirements of the new“Work Safety Law” and local policies, gas-fired production and business units such as the catering industry have basically installed combustible gas alarm devices, but why do accidents still occur frequently?

The traditional combustible gas alarm device needs regular adjustment, but as a restaurant business does not have the ability of regular adjustment, can not guarantee its normal use. After a few months the combustible gas alarm went off. There is an urgent need for a non-calibration, long-life flammable gas detector.

Aiming at the safety status of catering industry, Hanhai optronics has developed a passive fiber laser leakage monitoring system and an active internet of things laser online monitoring system. The two products do not need to adjust, the service life of up to 10 years. Is a more secure and reliable, low-cost integrated new technology products. Products can avoid the catering industry due to gas leakage caused by the explosion of the accident.

Due to the high cost of one-off purchase of laser products and the low safety awareness of restaurant vendors, they tend to choose low-cost one-off purchase of traditional detectors to be adjusted. But as the industry supervision department, it should undertake the safe and reliable technology on the issue concerning People's life safety.

Passive fiber laser leakage monitoring system

The passive fiber laser leakage monitoring system consists of a monitoring platform, a photosensitive terminal and an electromagnetic valve. The monitoring platform is placed in the monitoring center, the photosensitive terminal is placed in the gas-using fire scene, and the solenoid valve is placed at the gas pipeline entrance. The platform is connected with the photosensitive terminal and the solenoid valve by optical fiber to form a gas safety monitoring network. Once the gas leak occurs, the system drives the solenoid valve to cut off the gas source immediately to prevent the explosion. When the unit air reaches the safety standard, the system automatically restores the air supply.

01  No power supply is required on site

The system mainframe can be installed dozens of kilometers away, and gas-fired monitoring sites only need to install passive photosensitive terminals (pure optical equipment, no power supply) . The real-time and on-line monitoring of combustible gas is realized by remote monitoring platform in the area where restaurants gather.

02  No calibration is required

The passive optical fiber laser leakage monitoring system does not need regular calibration and maintenance to ensure its normal use. No error report can improve the reliability of gas detection.

03  Long life

Using semiconductor light source, optical glass, no contact measurement, no physical loss, life up to 10 years. Therefore, the lifetime of passive fiber laser leakage detection equipment is 10 times that of traditional detection equipment.

04 Is more stable

The stability of traditional detection equipment is poor, and it is easy to be impacted and poisoned by the high concentration of gas leakage. This problem does not exist in passive fiber laser leak monitoring equipment. More stable performance.

05 Laser industry only fire certification

Laser on-line monitoring system for active internet of things

01  gas monitoring concentration field visualization

With the display screen, the scene can be real-time display gas monitoring concentration, timely to avoid the occurrence of potential accidents.

02  scene sound and light alarm more intuitive

With on-site sound and light alarm function, fault prompt function. Gas leak the first time to remind the user, do a good job in a timely manner on-site staff evacuation.

03 more diversified means of communication

Can choose wired communications (RS485 or 4-20ma) , wireless communications (NB-Iot or 4G) , GPS or bluetooth communications, adapt to a variety of communication scenarios.

04 high protective performance

IP68 protection of the highest level, explosion-proof level up to Exd I a IIC T 6GB.