In the gas station automatic monitoring system for gas stations, the sensors mainly refer to the field instruments installed on the pipelines of the gas station, including pressure sensors, gas flow sensors, concentration detectors, and the like.

Recently, the oil and gas recovery system of the gas station in Nanhu District of Jiaxing City has been upgraded. Through the newly installed automatic monitoring system for oil and gas recovery, real-time online monitoring of oil and gas recovery has been effectively realized by means of sensor monitoring equipment such as oil and gas flow sensors and pressure sensors. Today, the sensor expert network Xiaobian will introduce the application of sensor technology such as pressure sensor and flow sensor in the automatic monitoring system of oil and gas recovery, and the domestic application status of automatic monitoring system for oil and gas recovery. Let¡¯s take a look.

The 12th gas station of Sinopec in Nanhu District, Jiaxing, data map

Jiaxing Nanhu District Gas Station: Oil and Gas Recovery Online Monitoring System Real-time Monitoring Equipment Failure

As early as 2010, the Nanhu District of Jiaxing City began the oil and gas recovery and transformation work. At present, the first and second-level oil and gas recovery systems have been installed in the oil depots and gas stations under the jurisdiction of the district. On this basis, this year, Nanhu District upgraded the primary and secondary oil and gas recovery systems, and is responsible for the installation of automatic oil and gas recovery monitoring systems for gas stations outside the second ring and with oil storage and annual sales of gasoline exceeding 5,000 tons. .

The picture shows the oil and gas recovery monitoring device at the fueling station, data map

In early June 2019, Sinopec's 12th station gas station began to upgrade the gas station, adding oil and gas online monitoring equipment with a total price of more than 300,000 yuan. By adding oil and gas flow sensors, pressure sensors, etc., oil and gas flow meters and pressure can be collected. The data of the sensor, while collecting the pulse signal of the fueling amount, can monitor the oil and gas recovery system of the gas station in real time and classify and store the data.

Online monitoring display, data map

At the same time, the real-time data display screen for online monitoring is set up in the gas station. The data such as tank pressure, pipeline pressure and oil and gas concentration can be clearly seen in the background. Once the equipment is faulty or the data is abnormal, it will be able to Automatically save data and generate alarm information and sound and light alarm prompts. It also has the function of turning off the gas-liquid ratio unqualified fueling gun, which effectively reduces the environmental risk of oil and gas emissions. Next, the data will be transmitted to the environmental protection department in real time to provide environmental protection data analysis for the environmental protection department.

Oil and gas recovery automatic monitoring system and sensor technology in it

The oil and gas at the gas station mainly refers to the gaseous gasoline that overflows during the refueling process, which will cause a series of environmental problems. For example, after the oil and gas volatiles at the gas station are inhaled into the human body, they will directly harm the human body; after the oil and gas volatiles are irradiated by ultraviolet rays, they will chemically react with nitrogen oxides in the air to generate photochemical smog, which will affect the air quality. Sometimes, there are problems with the oil and gas recovery system, and the gas station is not aware of it. The best way to solve these problems is to go online with an automatic online monitoring system for oil and gas recovery.

Oil and gas recovery refers to the recovery of oil and gas generated during the storage, transportation and sales of gasoline through a certain device, and the oil and gas volatilized during the process of unloading oil from the tanker and refueling in the tanker are collected into the underground storage tank. Therefore, oil and gas recovery is carried out. And long-term regulation is an effective measure to reduce VOCs emissions and further improve ambient air quality.

The automatic monitoring system for oil and gas recovery refers to the combination of a series of equipment for online monitoring of oil and gas recovery operating parameters based on the oil and gas recovery system.

Oil and gas recovery online monitoring system equipment installation diagram, data map

Generally speaking, the automatic monitoring system for oil and gas recovery consists of a sensor, an electrical measurement subsystem, a data remote transmission system, and a data centralized management software platform. The composition of the system is different due to different practical application technologies. Among them, the sensor mainly refers to the field instrument installed on each pipeline of the gas station, including pressure sensor, gas flow meter, concentration detector and so on.

For example, the gas flow meter is installed on the gas path inside the dispenser to monitor the return volume of each refueling operation; the pressure sensor is installed on the gas path directly connected to the underground storage tank, such as at the bottom of the refueling unit or at the back of the refueling main At the inlet of the treatment unit. The data collector is located in the fuel dispenser and is used to collect fueling pulses, return air pulses and pressure signals, and send the data to the monitoring machine through a communication cable for processing.

It is understood that at present, in the actual application of sensors, the online monitoring system for oil and gas recovery adopted by Sinopec, PetroChina and some private petrol stations can use foreign sensor devices, such as VFS gas flow sensors, Veeder-Root, USA. The company's Roots flowmeters and pressure sensors, as well as oil and gas sensors from Favnear FAFNIR, Germany. These sensors feature long life, compact construction and easy installation.

Application Status of Domestic Oil and Gas Recovery Automatic Monitoring System

At present, although the relevant national standards have certain installation requirements for online monitoring devices for oil and gas recovery, due to the large one-time investment, online monitoring systems have not been widely implemented. In addition, the gas station has insufficient understanding of the importance of on-line monitoring of oil and gas recovery. The online monitoring system lacks standard specifications for installation, acceptance, and operation management. The online monitoring equipment explosion-proof measurement and certification work has not been effectively carried out, and the effective operation management mode has not been established. It has restricted the role of China's oil and gas recovery online monitoring system.

The above is the application of sensor technology, such as pressure sensor and flow sensor, in the automatic monitoring system for oil and gas recovery. It is believed that in the near future, the domestic market will mainly adopt the online monitoring of oil and gas recovery at the gas station, and the supervision department will supplement the sampling or regular verification to supervise the effect of oil and gas recovery and treatment.