分析儀

Online Process Analysers for Storage Tank Service

WANAN analysers are flanged in-line instruments fitted directly to the process piping of atmospheric storage tanks, tank farms and loading terminals. Instead of drawing a sample and sending it to a laboratory or an analyser shelter, the sensor sits in the line and reports the measured variable to the plant PLC or DCS continuously. This makes them suitable for automatic tank dewatering, water draw-off monitoring and interface detection on crude oil, gasoline, diesel, jet fuel and petrochemical storage.

光學水包油分析儀（WACYS 系列）

The WACYS optical oil-in-water analyser measures the oil concentration in the water drained from a storage tank. An infrared source and a photodiode are arranged on a common optical axis in separate flameproof modules, isolated from the process by two cell windows. Measurement follows the Lambert-Beer absorption law, and the photocurrent is converted to a 4-20 mA signal by the control box. With a 0.1 s response time the dehydrator controller can stop the draw on the actual oil breakthrough instead of on a fixed timer, which cuts product loss and reduces the load on the oily-water treatment system. No sampling system, sample cooler or analyser shelter is required.

Key Specifications

典型應用

• 儲槽自動脫水 - 原油、汽油、重整產物及烷基化產物儲槽的引出管線上的油包水回流現象
• 介面監控 - 排水總管及封閉式排水系統上的水層突破指示
• 取水品質控制 - 在油水分離系統前驗證排放水的含油濃度
• 總雜質濃度 - 任何其吸收紅外輻射的方式與載體介質不同的分散相

Selection and Installation

Selection is based on line size, flange rating, design pressure and the required measuring principle. The analyser is installed in a straight run of the drain line with the optical axis horizontal, and the control box is mounted outside the hazardous area. Routine maintenance is limited to periodic cleaning of the cell windows and a zero/span check; there are no moving parts in the wetted path. Contact Wanan Technology with the line data and the required measuring range for a model recommendation.