Recently, the Ministry of emergency management issued a“Letter on soliciting the chemical and hazardous chemicals production and management units major production safety accident risk assessment standard -LRB-t-RRB-ial) revision opinion.”

It clearly points out the requirement of installing the detection and alarm device in the place where the flammable and poisonous harmful gas leaks.

12. Places involved in the leakage of flammable and noxious gases do not have detection and alarm devices in accordance with the national standards, and explosion-proof electrical equipment is not installed and used in places with explosive hazards in accordance with the national standards. The national standards stipulated in this article refer to“Code for design of detection and alarm for combustible and toxic gases in petrochemical industry”(GB50493-2009) , “Explosive Environment Part 1: General Requirements for equipment”(GB3836.1-2010) and“Electrical equipment for explosive gas environment part 16: inspection and maintenance of electrical equipment (except coal mines)”(Gb3836.16-2006) . Among them, “Petrochemical flammable gas and toxic gas detection and alarm design code” requirements, where a chemical and hazardous chemical enterprise is involved in the leakage of combustible and toxic gases, it shall install a detection and alarm device in accordance with the requirements of the above-mentioned regulations and standards. The detection and alarm device shall include the types of detection and alarm devices, the number and location of the device, the size of the alarm value detection, information transmission, continuous recording and storage requirements, sound and light alarm requirements, detection of the integrity of the alarm device; Explosive atmospheres-part 1: general requirements for equipment (GB3836.1-2010) and electrical equipment for explosive gas atmospheres-part 16: inspection and maintenance of electrical installations (other than coal mines)(GB3836.16-2006) clearly define the classification of explosion-proof areas, the requirements for type selection, installation and use of electrical equipment in explosion-proof area are put forward. For example, on August 26,2008, an acetylene gas leak and explosion at the organic plant of Guangxi Guangwei Chemical Co. , Ltd. killed 21 people and injured more than 60, one of the causes of the accident was that the flammable gas alarm was not installed in the tank farm, and the material leakage was not found in time. A liquefied gas (LPG) tank truck of Jinyu petrochemical company in Linyi, Shandong province, China, caught fire during an explosion on June 5,2017, after leaking LPG during unloading operations. According to analysis, the possible ignition source of the first explosion was an electrical spark generated by non-explosion-proof electrical appliances used in the duty room of Jinyu Petrochemical Company Limited in Linyi.

It can be seen that the installation of the flammable poisonous and harmful gas alarm device is imminent.

The chemical industry has been installed toxic and harmful gas alarm devices of enterprises commonly used is infrared, electrochemical, catalytic combustion of such traditional gas detection technology, there are some problems in these technologies, such as passive detection, regular adjustment, strong interference from environment, false alarm and missing report. And the laser absorption spectroscopy technology has the detection uniqueness, can accurately and quickly detect the required detection of leakage gas, its characteristics determine the advantages of laser products such as no false alarm, no need for regular adjustment, strong anti-interference ability.

At present, more than ten domestic enterprises can provide laser products. It can be divided into four categories: the first category is the Chinese Academy of Sciences to undertake major national scientific research projects of the technology transformation of scientific research results. The second is the overseas imitation technology brought back by overseas returnees. The third category is the university teachers lead students to research technology provided to enterprises. The fourth category is their own non-r & D capacity, OEM sales.

In early 2010, Hanhai established a joint venture with the Chinese Academy of Sciences to industrialize this scientific and technological achievement, which has lasted 12 years. Cohanhai company represents the technical level of our country in this technical field and has won the second prize of National Security Scientific and technological achievements. It is the leader of the industry and the maker of product quality standards, is our country in this technical field only has the international competitiveness enterprise. In the same industry, the real-time monitoring of safe production gas leakage in petrochemical industry has an absolute advantage.

In view of the causes and accident characteristics of explosions in chemical enterprises, the fixed reflection laser gas telemeter and fixed scanning laser gas telemeter with various gas monitoring functions can be more effective in advance prevention.

Fixed reflection laser gas telemeter

In line with the national GB/T 50493-2019 standard

It conforms to GB/T 50493-2019 standard for detection and alarm design of combustible and toxic gases in petrochemical industry.

The detection area is wide

The fixed reflection laser gas telemeter can be detected for a distance of up to 1 km.

Preventive monitoring

Different from the traditional passive waiting mode, the active detection of leakage risk points. Response time is only 1 second, can accurately detect ppm micro-leakage. To realize the preventive monitoring of gas leakage.

Flexible and precise positioning

The laser emitting end and the receiving end are integrated at one end, and the other end is only provided with a reflecting device, so that the installation is convenient. By moving the positioning device, the leak source can be found quickly.

Strong anti-interference

Compared with the traditional detector, it is easy to be interfered by environment and cross gas. Fingerprint detection, truly achieve zero false positives.

Accurate measurement

The leakage gas concentration can be obtained quickly by the spectral inversion algorithm, and the sensitivity is up to 1 ppm. M, completely eliminate the phenomenon of false alarm and missing report.

“0” maintenance

The product need not adjust, but can save the operation cost in the whole life cycle.

Long Life

The service life of the product is up to 10 years.

Detect gas diversity

Can be methane, hydrogen sulfide, ethylene, acetylene, carbon monoxide, ammonia, hydrogen fluoride, hydrogen chloride and other gases on-line real-time detection (according to customer demand to provide more gas detection program) .

Fixed scanning laser gas telemeter

Visual intelligent monitoring

Combined with high-definition video, remote 24-hour continuous monitoring of the field concentration data. Realize the omni-directional detection of trace gas leakage, accurate judgment of leakage direction.

The detection area is wide

The fixed scanning laser gas telemeter can rotate 360 degrees in a radius of 300 meters and can monitor the leakage in the target area of 280,000 m2. Applicable to a wide range of work occasions.

Preventive monitoring

Different from the traditional passive waiting mode, the active detection of leakage risk points. Response time is only 1 second, can accurately detect ppm micro-leakage. To realize the preventive monitoring of gas leakage.

Night vision infrared system

Night vision infrared system, 2 megapixels, 25x optical zoom.

High Integration

With the integrated design of detector, camera and head, the equipment can run independently, and can perform scanning, detection, alarm and communication with PC without other equipment.

Key areas can be set to monitor

It can monitor key areas such as flange joint and valve, and set different scanning mode to monitor key areas and key points without dead angle.

Strong anti-interference ability

Compared with the traditional detector, it is easy to be interfered by environment and cross gas. Fingerprint detection, truly achieve zero false positives.

“0” maintenance

The product need not adjust, but can save the operation cost in the whole life cycle.

Detect gas diversity

With methane, ethylene, acetylene and other gas detection capabilities (according to customer demand to provide more gas detection program) .