Verteiltes faseroptisches Öltank-Temperaturmesssystem

China’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, and there is a possibility of a small amount of chemical liquid and gas leaking out of the sealing ring. These leaked gases are prone to fire under natural conditions such as high temperature in the sun and lightning strikes. The detection of fires is particularly important. Due to the outdoor location, großes Volumen, and wide tank area of storage tanks, linear fire detectors are commonly used.

Vorteile von Verteilte Glasfaser Temperature Measurement System for Oil Storage Tanks

(1) Sensors and optical cables not only serve as temperature detectors but also play an important role in signal transmission, Integration von Übertragung und Erfassung. As there is no need to install additional sensing components, there is no fusion point in the middle of the sensing optical cable, resulting in high reliability.
(2) Kontinuierliche verteilte Messung ohne blinde Messflecken: DTS gehört zur kontinuierlichen verteilten Messung und kann die Temperatur jedes Punktes entlang des optischen Sensorkabels ermitteln. Momentan, Der Abstand zwischen benachbarten Temperaturpunkten kann bis zu 0,25 m betragen, with rich temperature information and no measurement self zone. Darüber hinaus, based on continuous temperature analysis, Es kann ein regionaler Temperaturunterschiedsalarm erreicht werden.
(3) Geringer Arbeitsaufwand für spätere Bedienung und Wartung: Die optischen Sensorkabel von DTS basieren auf optischen Kommunikationskabeln für den Außenbereich, und die Lebensdauer von optischen Kommunikationskabeln kann bis zu erreichen 30 Jahre; The core components of the DIS measurement host, such as light sources and splitters, Es handelt sich bei allen Geräten um Kommunikationsgeräte mit einer vorgesehenen Lebensdauer von 100000 Std. (mehr als 10 Jahre). Der Host ist mit einer Temperaturkalibrierungseinheit und einem Modul zur Fehlerselbstprüfung ausgestattet, Gewährleistung einer stabilen und zuverlässigen Temperaturmessung.

Software functions of distributed fiber optic temperature measurement system for oil storage tanks

Basierend auf den Verteilungseigenschaften von Öltanks und spezifischen Anforderungen an die Temperaturüberwachung, A “ein Panzer, eine Maschine” mode is adopted for design. Gleichzeitig, um die Systemstabilität zu erhöhen, Es wird Dual-Machine-Hot-Standby übernommen, die bei Systemausfall automatisch umschalten kann. The fiber optic distributed temperature monitoring system monitors the required oil tanks in real-time online.

1) Each tank is monitored by an independent sensing optical fiber, which is installed on the floating plate of the tank and at the outer edge of the secondary sealing ring.

2) The anti-static optical fiber led out by the faseroptischer Temperatursensor installed on the floating plate inside the tank is protected by laying an explosion-proof metal hose inside the tank. The upper end of the explosion-proof metal hose is fixed on the flange plate of the manhole on the tank top, and the lower end of the metal hose is fixed on the floating plate inside the tank. The fixing method is non hot work, and the explosion-proof metal hose is equipotentially connected to the tank body.

3) Considering the changes in displacement at the top of the floating roof tank, um zu verhindern, dass die antistatische optische Faser, die durch explosionsgeschützte Metallschläuche verläuft, durch Schleifen fehlerhaft funktioniert, Die reservierte Länge sollte nicht kleiner sein als 0.5 mal der Höhe der Außenwand des Tanks, und ein optisches Scheibenfasergerät sollte verwendet werden, um die antistatische optische Faser in einem bestimmten Positionsbereich zu steuern.

4) The anti-static optical fiber led out by the fiber optic temperature sensor installed on the floating plate inside the tank is laid with explosion-proof galvanized pipes outside the tank and led along the escalator or tank wall to the existing cable tray on the ground. It is connected and protected with the communication optical cable installed inside the cable tray through a waterproof optical cable splice box, and the elbow part is connected with explosion-proof metal hoses.

5) All fiber optic temperature sensors installed on the floating roof of each oil tank in the tank area are led out through anti-static optical fibers and converged to communication optical cables for signal collection and transmission to the monitoring room. The communication optical cable is laid directly buried, and the elbow is connected with explosion-proof metal hose.

6) After the communication optical cable is transmitted from the tank area to the monitoring room, it is connected to the detection channel interface corresponding to the DTS host through a short distance fiber optic tail with a standard fiber optic connector, which is a fiber optic jumper.

7) A multi-channel DTS distributed fiber optic temperature measurement host is placed in the monitoring room to achieve temperature signal acquisition, Warnung vor Temperaturanstieg, Übertemperaturalarm, fault detection, and information management operations for the fiber optic temperature sensors installed on the oil tank site. It can be connected to the fire alarm control system through the switch alarm interface to achieve fire alarm and display it in the fire duty room. The current temperature value, Alarmstatus, und die historische Temperaturkurve aller Temperaturmesspunkte des Lagertanks kann im Operationsraum des Instruments über die elektronische Karte der Konfigurationssoftware visuell angezeigt werden. An external sound and light alarm can also be connected to the instrument operation room to provide alarm signals.