Yesterday (June 21) summer solstice, the heat expansion and cold contraction intensified in high temperature days, which is easy to cause the deformation of natural gas pipelines and equipment, and there are potential safety hazards such as gas leakage, so the safety of gas is more and more important.

Accident 1: Shandong Tai'an liquefied gas tank explosion has caused 3 deaths and 10 injuries

According to the official website of Tai'an Emergency Management Bureau, on the morning of June 21, an explosion accident caused by the leakage of liquefied gas tanks in a front room on the first floor of Tai'an Greenland mansion injured a total of 13 people. Up to now, three of them have died due to serious injury and deterioration of the injury. The rest of the injured are receiving further treatment. At present, the detailed cause of the accident is under investigation. Tai'an City has launched a comprehensive investigation and rectification of potential safety hazards in stores along the street within the city.

Accident 2: 23 people were injured in a gas explosion accident in Tianjin

According to CCTV news on the evening of the 21st, at about 16:45 on June 21st, 2022, near the intersection of Beicheng East Road and Wusu road in Baodi District, Tianjin, gas leakage caused by illegal construction led to a combustion and explosion accident, resulting in 23 injuries, including 3 severe burns, which are being treated in a professional hospital; 15 slightly injured persons were observed and treated in the hospital; Five slightly injured persons have been discharged. The cause of the accident is under investigation.

According to the national gas accident analysis report (report of the first quarter of 2022) (released in June 2022 by the safety management working committee of China City Gas Association, China gas safety magazine, and the wechat official account of gas safety and services), a total of 278 gas accidents nationwide (excluding Hong Kong, Macao and Taiwan) were collected in the first quarter of 2022, including 1 major accident.

According to the types of accidents: 174 residential user accidents, 29 industrial and commercial user accidents, 73 pipe network accidents, and 2 plant and station accidents. The gas accident caused a total of 17 deaths and 154 injuries.

There were 94 natural gas accidents, including 17 residential user accidents, 2 industrial and commercial user accidents, 73 pipe network accidents and 2 plant and station accidents, resulting in 5 deaths and 18 injuries.

Proportion of natural gas accident types in the first quarter of 2022

It can be seen from the report that there are many deficiencies in the field of gas safety, among which the lagging problem of scientific and technological means is more prominent. Relying on the eyes and nose to make artificial judgment alone cannot perceive the risk in advance. Another is that the proportion of pipe network accidents is relatively high. Therefore, it is imperative to use technical defense instead of civil defense.

In response to this social demand and pain point, Hanhai Technology Group has made full use of the existing technologies and achievements related to the underground gas pipeline network, focused on the pain points and difficulties of the development of urban gas safety, guided by national demand, driven by innovative research and development, and aimed at the safety of urban gas lifelines, it has cooperated with the Chinese Academy of Sciences to undertake the industrialization of laser absorption spectrum gas detection technology, a major national special scientific research achievement.

(in 2021, Hanhai technology group and Shenzhen Institute of urban public safety technology established a joint research and Development Center for flammable, explosive, toxic and harmful gas detection, which will comprehensively help the safety of urban lifelines.)

Its self-developed laser gas leakage monitor solves the problem of urban gas safety blind spot. It can be applied to the important nodes of gas pipelines such as pressure regulating box, pressure regulating cabinet and valve well before entering the house. Build the last defense line for household gas safety.

Facing the blind spot and monitoring pain point of urban gas safety

The common gas monitoring equipment in the market can not effectively and fully meet the online monitoring needs in the complex environment of above ground and underground space.

The laser gas leakage monitor has overcome the technical bottleneck of convenient power supply on the ground, underground integration of flood resistance, corrosion resistance, high precision, long life and calibration free characteristics, and effectively solved the technical problems of sensor measurement drift, weak transmission signal in underground space and long-term low-power operation.

Thinking about building hard core products

The underground space environment has complex characteristics such as high temperature, high humidity, water logging, strong acidity and alkalinity and weak signal. The commonly used monitoring equipment can not meet the use environment of underground space. The equipment is faced with harsh environments such as strong acid, strong alkali, high humidity, flooding, and various gas interference. How to realize long-term, online, calibration free, highly sensitive, and highly reliable detection capabilities is a difficult problem for large-scale urban monitoring applications.

Laser gas leakage monitor

In view of the above problems, the laser gas leakage monitor has achieved the following technological breakthroughs:

01 low power consumption

The laser gas leakage monitor of the Internet of things adopts solar energy and battery power supply, and uses intelligent monitoring system, ultra-low power consumption and ultra-long operation time to promote the effective monitoring of the end link.

02 preventive monitoring

The response time is less than 10 seconds, which can accurately detect ppm trace gas leakage, upload the monitoring and alarm data to the cloud platform, make the gas concentration data display more intuitive, help the full coverage monitoring of urban gas leakage, and truly realize the preventive monitoring of gas leakage.

03 easy installation

The modular design from detector to control system is adopted. The simplified system structure makes the installation easier.

04 strong anti-interference ability

It will not be disturbed by humidity, dust, temperature and other gases, and can work in high humidity environment for a long time.

05 omnidirectional NB lot Internet of things access

Using Internet of things technology, all areas covered by the network can be used without limitation of distance and scope.

06 waterproof alarm function

The water level monitoring function can monitor the accidental water inflow in the valve well in real time.