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Industry Overview Analysis:   There are various types and wide distribution of toxic and harmful gases in the petroleum and petrochemical production process, which have potential fire, explosion, and poisoning hazards. The main toxic and harmful gases include hydrogen sulfide, chlorine, carbon monoxide, ammonia, benzene vapor, etc.   Especially in recent years, with the change of crude oil types, the sulfur content in crude oil has increased, and the content of hydrogen sulfide in its production process medium has also increased, up to more than 80%. The risk of hydrogen sulfide poisoning is also increasing. Hydrogen sulfide is mainly distributed in the dry gas, gas, acidic gas, sulfur-containing wastewater, crude gasoline, diesel, liquefied gas, residual oil, condensed oil and other media of refining and production equipment. Leakage is prone to occur in areas such as water outlets, sampling ports, condensate discharge ports, vent ports, and metering instrument interfaces; Ammonia mainly exists in sewage stripping devices, ammonia storage tank areas, chemical fiber sewage treatment devices, etc; Benzene vapor mainly exists in catalytic reforming units, aromatics extraction units, and storage tank areas; Carbon monoxide mainly exists in boilers, heating furnaces, combustion chambers, and flue gas. Therefore, strengthening the detection of toxic and harmful gases in the petroleum and petrochemical industry is of great practical significance.   Solution Overview:   Gas detection alarms are installed in various places prone to producing flammable and toxic gases in oil production and processing, constantly monitoring the content of flammable and toxic gases in the atmosphere. By controlling the host, various signals are collected, stored, controlled, and uploaded to achieve environmental monitoring in the oil industry field.   The Yao An electronic gas controller collects data from gas detectors, performs CPU logic operations, automatically controls external devices according to set parameters, and actively uploads the collected data to the data server for real-time synchronization. It drives the LED display screen to display the environmental parameters of the area in real time, timely reminding whether it is suitable for personnel to enter the place.   System functions:   1) Detection function: The gas detection alarm can monitor the gas concentration in real time. When the detected gas concentration in the air exceeds the set value of the detector, it will immediately sound and light an alarm.   2) Data storage function: Install a data server in the monitoring center to improve the secure storage and scalability of data, making it convenient for monitoring personnel to view monitoring data at any time.   3) Monitoring alarm function: When the monitoring center detects abnormal data, it will promptly notify relevant personnel via SMS to improve the timeliness of the alarm.   For specific products and solutions, please consult Yaoan customer service to select the appropriate combustible/toxic gas alarm according to the corresponding location.

Industry Overview Analysis:   The chemical industry has a wide range of categories, complex processes, and diverse products. The pollutants emitted during production are diverse, large in quantity, and highly toxic. More than 80% of production areas may have flammable and explosive hazards. Meanwhile, chemical products may generate a large amount of toxic and harmful gases in various processes such as processing, storage, use, and waste disposal. 1) The coal industry mainly produces gases such as carbon monoxide, hydrogen sulfide, methane, sulfur dioxide, chlorine, and ammonia. 2) The chlor alkali industry mainly produces toxic and combustible gases such as chlorine, hydrogen, vinyl chloride monomer, acetylene, ammonia, etc. 3) The polysilicon industry mainly produces gases such as HCL, carbon monoxide, and hydrogen. 4) Fine chemical industry mainly produces gases such as concentrations of combustible gases, ammonia, chlorine, methanol, and acetone.   Installation instructions for combustible/toxic gas alarm: 1. Firstly, identify all possible leakage points in the monitoring field, and calculate their leakage pressure, possible leakage amount per unit time, leakage direction, etc. Draw a chessboard distribution map and speculate on their severity. Select the corresponding gas alarm product based on the gas type. 2. Check if there is any large electromagnetic interference around the area where gas leakage is to be detected. Electromagnetic interference can affect the detection accuracy and sensitivity of the alarm, causing data deviation. 3. Based on the dominant wind direction, circulation phenomenon, upward trend of air flow, and habitual channels of natural air flow in the location, it is comprehensively inferred that when a large amount of leakage occurs, the natural diffusion trend of combustible gas on the plane is shown in the wind direction chart. 4. According to the weight of gas compared to air: it should be installed 30-60cm above the ground; Gas lighter than air: installed 30-60cm away from the ceiling. The controller is easy to operate and is 1.5 meters above the ground. It is installed in duty rooms and other places. 5. Study whether the leakage point is in a point leakage state, micro leakage, or jet leakage. If there is a slight leakage, the location of the point should be closer to the leakage point; If it is in a jet shape, it should be slightly away from the leakage point. Based on these conditions, the final design plan should be formulated. 6. For a large factory with combustible gas leakage, it is recommended to set up a detection point every 5-10m apart; Install one every 15 meters outdoors, with a protection radius of 7.5 meters; Enclosed and semi enclosed indoor spaces require one installation at a distance of 7 meters, with a protection radius of 3.5 meters. 7. For spray painting and coating workplaces, large printing machines, and related workplaces, they all belong to open combustible gas diffusion and overflow environments. If there is a lack of good ventilation conditions, it is also very easy to make the combustible gas content in the air of a certain area close to or reach the explosive lower limit concentration value. These are safety monitoring points that cannot be ignored.     Notes: 1) The gas detector has undergone strict calibration before leaving the factory. After installation, please do not replace the components randomly. If replacement is required, it must be recalibrated; 2) The sensor of the gas detector has a normal service life of three years for combustible gases; Due to different usage environments, its service life may decrease, and regular testing and maintenance should be conducted every year; 3) Gas detectors prohibit the impact of high concentration gases, as this may damage the sensor;   4) To avoid frequent power outages of gas alarms, which can lead to unstable operation of detection components; 5) During use, it is necessary to regularly check whether the instrument is working properly, and the inspection cycle should be at least once every three months.   For specific products and solutions, please consult Yaoan customer service to select the appropriate combustible/toxic gas alarm according to the corresponding location.