Storage oil storage base-application technology solutions
1. Why do oil storage bases use optical fiber temperature detection?
Most of the crude oil in my country belongs to the "three high" crude oils. Therefore, mastering the rheological properties of waxy crude oil is the key to scientific management of oil and gas storage, increasing crude oil delivery, and avoiding the occurrence of "condensation pipes". Temperature is an important physical quantity in the rheological parameters of waxy crude oil, and it is also an indispensable basic parameter in oil storage technology and oil transportation process design and pipeline operation. Therefore, accurate determination of crude oil temperature is critical to oil and gas storage and the operation and management of oil pipelines. important. Petroleum and natural gas are flammable and explosive. In order to realize the safe storage and transportation of oil and gas, a lot of research has been carried out. In the storage and transportation of oil and gas, factors such as ambient temperature and turbulence will cause changes in the temperature in the tank, and there are hidden dangers of accidents. Therefore, real-time temperature monitoring is required in the oil and gas storage and transportation. At present, the commonly used thermometers for measuring temperature are divided into contact thermometers and non-contact thermometers. These thermometers have various shortcomings for oil and gas temperature measurement. In order to make up for the shortcomings of the previous temperature measurement methods, we are engaged in the research and development of fiber grating sensors, using the current world's advanced sensing technology to monitor the temperature of oil and gas tanks. The unsafe factors that may be caused by other sensors are fundamentally excluded. Fiber grating sensors are modulated by wavelength. Since Morey's first report in 1989, it has received widespread attention from all over the world, and great progress has been made in theoretical and applied research. This new type of sensor uses light waves as signal carriers, fiber gratings as sensing probes, and uses optical fibers to transmit information. It is a safe and pollution-free sensor with strong anti-electromagnetic interference ability, good electrical insulation, corrosion resistance, and high sensitivity. It has the advantages of small size, softness and flexibility, and there are no unsafe factors such as electric sparks. It has high measurement accuracy, wide temperature measurement range, fast response speed, and can work under high temperature and high pressure. It can also be used to control the temperature of oil and gas. Distributed online measurement is convenient for on-site testing, and is particularly suitable for conveniently and effectively completing the sensing function in flammable and explosive environments such as petrochemicals.
With the rapid development of my country's national economy, there is an increasing demand for crude oil and its processed products. In recent years, many large-scale petrochemical complexes and supporting oil tank farms have been built. These tank areas, especially floating roof oil tanks, have a large amount of volatile oil vapor above the floating plate, which belongs to the flammable and explosive gas environment area, and is very sensitive to electric sparks and other open flames. Therefore, the intrinsic safety of the measuring elements is very important. .
Significance and necessity of project application
A large number of sensors and data transmission are required for measurement, security and monitoring in oil storage enterprises. Because the air in the oil storage environment often contains a large amount of flammable gas, the parts used must be explosion-proof. With the development of optical fiber technology, optical fiber sensing technology and optical fiber communication technology have matured. This project will use optical fiber sensor technology and optical fiber communication system to realize all-optical fiber metering automation for storage companies' oil tanks. The optical fiber level sensor measures the level of the oil in the storage tank, combined with the temperature measured by the temperature sensor, can calculate the density of the oil, and then cooperate with the volume meter to calculate the quality of the oil. The optical fiber liquid level sensor is to check whether the oil level reaches the upper limit, and if it reaches the upper limit, it can send out an alarm message, thereby preventing the occurrence of roof fall accidents. Moreover, it is possible to test the longitudinal and lateral temperature distribution in the tank by arranging temperature measurement points at multiple points in the tank, which can effectively prevent the explosion of the tank due to excessive temperature, or the accident of crude oil condensation due to the low temperature.
2. Food safety monitoring
Electricity does not enter the warehouse, all optical fiber, intrinsically explosion-proof; lightning protection, anti-electromagnetic interference
Food + ambient temperature, non-parallel, distributed
Integrated perimeter, gas monitoring (hydrogen sulfide, oxygen, carbon dioxide)
Three, oil and gas data security detection
With the development of the economy, the number of chemical storage tanks has been greatly increased, and there are more and more large-scale and agglomerated storage tank areas in China. The safety of storage tanks has always been an issue that the chemical industry departments at all levels, fire protection and environmental protection departments and enterprises attach great importance to. At present, my country's chemical storage tanks mainly use floating roof tanks and spherical tanks. The top of the floating roof oil tank adopts secondary sealing technology, but it is not completely sealed. There is a possibility of a small amount of chemical liquid and gas leaking from the sealing ring. These leaked gases are prone to fire under natural conditions such as high solar temperature and lightning strikes. The fire detection is particularly important. Because the storage tank is outdoors, large in size and wide in the tank area, linear fire detectors are often used.
DTS distributed optical fiber temperature sensor is a new generation of linear optical fiber temperature sensor in the world. It has the advantages of intrinsic explosion-proof, anti-strong electromagnetic interference, lightning protection, high measurement accuracy, light weight, and small size. In particular, the distributed optical fiber temperature sensor is a continuous distributed temperature-sensing fire detector, which can realize the temperature measurement at any point along the optical fiber, without measurement blind spots, and the optical fiber is both a transmission medium and a sensing element, and no additional measurement is required. The temperature sensor device is simple to install and has high reliability. Its performance is better than traditional linear temperature detectors, and it is suitable for chemical storage tank fire monitoring applications.
4. Application of Hoyatek DTS Distributed Optical Fiber Temperature Measurement System
This system adopts today's advanced photoelectric technology, communication technology, microprocessor technology, digital temperature sensing technology and original design of low temperature, strong electric field, and humid environment operation technology. It can separately monitor the temperature in different environments, discover potential accidents as early as possible, and minimize losses. At the same time, it can also provide a large amount of online monitoring data to provide a reliable basis for operators to fully understand the operation of power equipment.
Features of DTS distributed optical fiber temperature monitoring system
[Advancement] : Based on the internationally promoted distributed optical fiber temperature measurement technology, and on the basis of nearly 20 years of successful application experience abroad, this system has excellent technical performance and quality;
[Safety] : Using optical fiber as the medium of temperature sensing and signal transmission, the sensor does not need power supply to work, it is intrinsically safe, has excellent insulation performance and anti-electromagnetic interference, and the sensor installation meets safety regulations;
[Stability and accuracy] : The temperature data is obtained by detecting the movement of the wavelength of light waves. The sensor is only sensitive to temperature, which avoids the problem of traditional sensors that are easily affected by interference factors such as power fluctuations and transmission line loss. The system is stable and reliable; temperature measurement accuracy Reach ± 1℃, and the temperature resolution can reach 0.1℃;
[High reliability in long-term operation] : The system is safe and reliable in operation, stable in performance, suitable for long-term continuous work in harsh environments;
[Compatibility] : The monitoring host has its own standard communication interface, provides Ethernet port, RS232, USB, etc., combined with the variable power station integrated automation system, etc., to achieve data sharing, simple management, and seamless connection with related systems;
[Economy] : The cost of the system is reasonable and cost-effective. After it is completed and put into use, it can work unattended for a long time, and the maintenance cost is low;
[Ease of operation and maintenance] : Friendly man-machine interface, easy operation; the sensor has no zero drift, no need to re-calibrate, and the system is maintenance-free;
Five, related case display