Level Instrumentation for Pulp and Paper Process Applications
歡迎來到我們的第三部分關於紙漿和紙張流程應用程序的級別儀器。隨著紙漿和紙張運營麵臨競爭的增加，隨著保護和碳緩解舉措的需求提高，設施管理人員正在密切評估提高流程效率的方法。在紙漿和造紙廠的準確，可靠的水平控製可乐动体育下载以是工藝改進的關鍵來源。
在本博客文章中，我們解決了在植物範圍操作中的級別儀器應用，包括MC泵安裝物，儲水，化學品和添加劑以及潤滑和液壓油。
MC泵立體座
應用：Designed to move thick fluids, MC (medium consistency) pumps are ideal for transporting pulp in a mill. Pulp is often pumped from a standpipe, a vertical feed pipe integral to the pump. Pumps with standpipes typically pump to and from washers and thickeners, O2 and CLO2 mixers, extraction towers, bleach storage towers and high-density pulp storage towers.
挑戰：It is important that the proper level of pulp be maintained in a standpipe. A level control in the standpipe does this by actuating a valve downstream of the pump. A malfunctioning level control could result in standpipe overflow, or cause a pump to operate in a no-flow condition in which it would quickly sustain damage through overheating and seal damage.
水平技術：
- Thermatel®熱分散開關，用於點電平
– Eclipse® Guided Wave Radar Transmitter for continuous level
磨水儲存
應用：Because pulp is processed and paper is made in an aqueous vehicle that is up to 99.5% water, water management is essential for productive mill operations. Level controls monitor the storage of cold, warm and hot process water, potable water, boiler feedwater, liquor production water, process wastewater, and open effluent weirs, sumps, and stormwater basins.
挑戰：Process, reclaimed and service water storage may range from small tanks to
large bulk tanks with heights of 40 feet (12.2 meters). Controls are specified according to the size and geometry of the bulk storage vessel. Level controls in open atmosphere reservoirs must withstand punishing weather conditions. Firewater storage must conform to NFPA standards.
水平技術：
– Model A15 Series Displacer-Actuated Switch or Echotel® Ultrasonic Switch for point level
– ECHOTEL Non-Contact Ultrasonic Transmitter, ECLIPSE Guided Wave Radar Transmitter or Pulsar® Non-Contact Radar Transmitter for continuous level
– Atlas® Magnetic Level Indicator for visual indication
化學和添加劑儲存
應用：儲存的磨機中的化學股包括酸和堿，脫果化學品，漂白劑和水處理化學品。將化學添加劑混入造紙機的濕端的過程流中，包括染料和顏料，排水助劑，消泡劑，纖維纖維劑和各種特種化學品，可提高紙張性能。
挑戰：Chemical solution storage and day tanks require stringent level monitoring. Though precise chemical measurement is accomplished by metering pumps, tank level controls actuate tank-filling operations and protect against overfilling. Tank size and geometry, the presence of mixing hardware, and the solution’s chemical nature are prime factors in level instrument selection.
水平技術：
– Model A15 Series Displacer-Actuated Switch or ECHOTEL Ultrasonic Switch for point level
– ECHOTEL Non-Contact Ultrasonic Transmitter, ECLIPSE Guided Wave Radar Transmitter or PULSAR Non-Contact Radar Transmitter for continuous level
- 用於視覺指示的Atlas磁電平指示器
潤滑和液壓油
應用：Pulp and paper mills operate many machines that require lubrication. Lubricants prevent damage caused by excessive friction and prolong component and equipment life. Oil is stored in stainless steel and carbon steel tanks. While gearboxes hold up to 50 gallons, and hydraulic reservoirs up to 200 gallons, a paper machine may contain up to 5,000 gallons of lubricant.
挑戰：Level monitoring of oil reservoirs will ensure the proper functioning of pumps, gearboxes, drives, compressors, bailing presses, materials handling equipment and paper machines. Temperature shifts in oil reservoirs affect media density that excludes some technologies, such as pressure transmitters. Because ISO cleanliness levels increase oil change frequency, controls should be easy to remove.
水平技術：
– ECHOTEL Ultrasonic Switch or Tuffy® II Float-Actuated Switch for point level
– ECLIPSE Guided Wave Radar Transmitter or PULSAR Non-Contact Radar Transmitter for continuous level
- 用於視覺指示的Atlas磁電平指示器
Discover the benefits of level control for pulp and paper process.
