The work safety law has clear safety legislative requirements for units using natural gas in the catering industry, and the catering industry has been strengthened throughout the country. The explosion in Chongqing on January 7 once again reminds us that the canteen of organs and schools is also a place that needs to be paid special attention to.

The canteens of institutions and schools are characterized by dense personnel and large gas consumption. Once a gas deflagration accident occurs in such places, the consequences are very serious and the social impact is bad. Therefore, the gas safety in such places is particularly important.

Old electrochemical or catalytic combustion gas leakage detectors are still used in government organs and school canteens. But over time, these detectors quickly became useless because they had no professional maintenance. At present, the use of gas in canteens of most organs and units is in a state of no safety monitoring, which is a great potential safety hazard in each unit.

In view of the current situation of gas safety in government and school canteens, Hanhai has designed a complete solution by using the most advanced laser detection technology, which can eliminate the existing potential safety hazards in government canteens.

Laser absorption spectrum detection technology

Laser detection technology is based on the principle of specific light absorption by gas molecules Beer's law is an advanced technology in the detection of beer's law. This technology makes up for all the technical defects of catalytic combustion, electrochemistry and infrared.

Laser safety monitoring system

     The system consists of laser monitoring platform, passive laser detector and solenoid valve. The monitoring platform is located in the property monitoring center, the passive laser detector is located in the gas and fire unit, and the solenoid valve is located at the inlet of the unit's gas pipeline. The platform is connected with the detector and solenoid valve by optical fiber to form a gas safety monitoring network. In case of gas leakage, the system will immediately drive the solenoid valve to cut off the gas source to prevent combustion and explosion. When the unit air of gas and fire reaches the safety standard, the system will automatically restore the air supply.

Technical advantages of laser monitoring system

01 high sensitivity

The laser detector has high sensitivity and can detect very small gas leakage, so as to achieve accident early warning and prevent accidents.

02 fast reaction speed

The laser detection reaction speed is fast, and the action of discovering and cutting off the gas source can be completed within 1 second to prevent accidents.

03 no power required

The laser detector itself is a passive design, which can work without electricity on the monitoring site and is intrinsically safe.

04 strong anti-interference ability

The laser detector is free from environmental interference and can work stably in high heat, high humidity and strong electromagnetic environment without false alarm.

05 long service life

The laser detector has a service life of up to ten years and does not need adjustment and maintenance, which is safe and reliable.

system configuration

Social benefits of laser monitoring system

Low cost and high efficiency

The investment of laser safety monitoring system in an organ and school canteen is only hundreds of thousands of yuan, which can ensure safety for more than ten years, and the economic benefits in the whole life cycle are very considerable.

Real time online security management

The laser system platform placed in the monitoring center can intuitively display the safety status of each gas and fire unit, so as to achieve real-time online safety management. The system can also upload the monitoring data to the emergency management department to provide real-time data for urban safety big data management, so as to place major safety hazard sources under supervision.

Intelligent management

It makes the safety management of urban complex intelligent, which is an integral part of smart city.

Current situation of laser absorption spectroscopy detection technology in China

Laser absorption spectrum detection technology is recognized as the most ideal gas detection technology in the scientific and technological circles. It makes up for all the defects of commonly used gas detection technologies such as catalytic combustion, electrochemistry and infrared. It is the development trend of gas detection technology in the world.

The detection technology of laser absorption spectrum is still developing in the world. China began to study this technology as a major scientific research project in 2005, which started earlier, and a number of products are leading in the world. One belt, one road, will be exported to the Central Asian countries by the joint venture between Anhui science and technology and the Chinese Academy of Sciences. Zhongke Hanhai's products represent China's technical level in this field. They have been identified as domestic leading and international advanced by the State Administration of work safety. They have been jointly promoted by many ministries and commissions, including the Ministry of science and technology and the Ministry of industry and information technology. They have won the second prize of national safety science and technology. The technology has been applied in PetroChina, CNOOC, Beijing gas and Guangzhou Gas in recent two years. In particular, the urban gas pipe network inspection and monitoring system developed by the company has not only been evaluated as "domestic leading and international advanced" by the State Administration of work safety, but also been widely recognized by the gas industry. The laser monitoring system of urban gas pipe network is an urban management system and a series of laser products developed based on the concept of large pipe network, which greatly improves the safety level of urban gas pipe network. At present, an unattended and intelligent laser safety monitoring system is being designed for the Qinghai Tibet gas transmission pipeline.

At present, several domestic enterprises introducing technology from the United States can also provide laser technology products to urban gas, but the technical indicators need to be verified and the products are not in series. Laser technology products such as abb, German digital micro, Hans of the United States and Tokyo gas of Japan are imported from abroad, but the level is not high in terms of technical parameters and technical methods.