食物 谷物中细菌检测方案(液体流量计)

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T +31(0)573 45 88 00 F +31(0)573 45 88 08 I www.bronkhorst.com E info@bronkhorst.com LIQU-FLOWIM Series L10 / L20 Digital Mass Flow Meters / Controllers for Liquids > Introduction Bronkhorst High-Tech B.V.， the European market leader in thermalMass Flow Meters/Controllers and Electronic Pressure Controllers，has many years experience in designing and manufacturing preciseand reliable measurement and control devices. With a wide rangeof instruments， Bronkhorst offers innovative solutions for manydifferent applications in many different markets. The instruments aremade to customers' specification， in various styles， suitable for usein laboratory， industrial environment， hazardous areas， semiconductorprocessing or analytical equipment. >LIQUI-FLOWTM series L10 / L20 Bronkhorst has been the pioneer in the field of micro to low flowliquid metering instruments based on a thermal measuring principle.The digital LIQUI-FLOWTM Mass Flow Meter was designed to coverthe range between 5 and 1000 g/h (Full Scale) in a compactinstrument with a fast response. The Flow Meter is basically astainless steel tube without any moving parts or built-in obstructions.The heater/sensor assembly is arranged around the tube and， byfollowing the anemometric principle： a constant difference intemperature (AT) is created and the energy required to maintainthe AT is dependent of the mass flow rate. Due to the benefits ofthe unique patented sensor， the fluid will be warmed to a maximumof 5℃， thereby making the L10/L20 series suitable for fluids withlow boiling points. > Liquid flow control Flow control is achieved by integrating a control valve onto thebody of the Liquid Flow Meter， or by mounting it as a separatecomponent [in IP65 configuration). This control valve has a purgeconnection on top of the sleeve that enables easy elimination of airor gas when starting up the system. The electronic control functionforms part of the normal circuitry in the liquid flow meter， so theneed for an external controller is eliminated. > Multi-Bus technology Bronkhorst developed their latest digital instruments according tothe “multi-bus” principle. The basic pc-board on the instrumentcontains all of the general functions needed for measurement and control. It has analog I/O-signals and also an RS23 connection asa standard feature. In addition there is the possibility of integrating aninterface board with DeviceNetTM， PROFIBUS DP， Modbus， EtherCATor FLOW-BUS protocol. > General LIQUI-FLOWTM features ◆fast and accurate measuring signal ●iinsensitive to mounting position ◆ very small internal volume ◆ suitable for liquids with low boiling points ◆ for laboratory and OEM applications ◆also available for industrial applications， with IP65 housing，ATEX Cat.3， Zone 2 > Digital features ◆D[eviceNet M， PROFIBUS DP， Modbus-RTU/ASCII， EtherCATor FLOW-BUS slave ◆ RS232 interface ◆ alarm and counter functions >Fields of application ◆SSemiconductor industry ◆ HPLC applications Chemical industry Food & Pharmaceutical industry ◆ Analytical laboratories > Dimensions and weights Model A B C H K Weight (kg) L13 (1/8”OD) 47 98 47 118 25 0，4 L23 (1/4”OD) 47 102 47 121 25 0，4 Mass Flow Controller IP65 Mass Flow Meter Model A B C H K L Weight (kg) L13I (1/8"OD) 47 98 74 125 25 36 0，9 L23I (1/4”OD) 47 102 74 128 25 36 0，9 Dimensions in mm Model A B C H K L Weight (kg) L13I+C2I (1/8”OD) 127 178 74 125 29 36 1，4 L23I+C2I (1/4”OD) 127 178 74 128 29 36 1，4 > Industrial style LIQUI-FLOWTM series The LIQUI-FLOWTM series L10I/L20I digital Liquid Flow Meters /Controllers for low flow ranges are equipped with a rugged‘industrial style'(IP65) pc-board housing for use in industrialenvironments or even Zone 2 hazardous areas， due to theirATEX category 3 approval. The instruments operate on a thermal，thru-flow measuring principle. The flow meter can be connectedto a control valve to form a closed control loop. The standarddirect acting valve (model C2l) is normally closed， has a pressurecapability of 100 bar (1500 psi) and a purge connection for easyelimination of air or gas. L13I Mass Flow Meter，IP65 configuration IP65 Mass Flow Meter with close-coupled Control Valve > Application examples Verifying pumps LIQUI-FLOWIM flow meters are used in analytical applications incombination with HPLC pumps， verifying the pump performance oreven， as shown in this example， close-coupled with a gear pump.Using the integrated PID controller， the setpoint signal continuouslyadjusts the rotation speed of the pump. GMP validation in food & pharma filling processes In food and pharmaceutical applications critical filling processesmust be very accurately and， above all traceably documented. LIQUI-FLOWIM Series L10/L20 are particularly suitable for this task. Themain features of these digital instruments are： high precision， fastresponse， compact design and a very small internal volume. Bronkhorst High-Tech B.V. Nijverheidsstraat 1a， NL-7261 AK Ruurlo Netherlands Liquid Delivery with Vapour Control The CEM-System (Controlled Evaporation and Mixing) is aninnovative Liquid Delivery System (LDS] that can be applied foratmospheric or vacuum processes. The vapour generation systemconsists of a liquid flow controller，an MFC for carrier gas anda temperature controlled mixing and evaporation device.The system is suitable for mixing liquid flows of 0，25-1200 g/hresulting in saturated vapour flows of 50 ml，/min up to 100 l，/min.This vaporizer system can replace bubblers. New opportunitiescreated with the CEM-system： mixtures can be evaporated andeven solids， dissolved in solvents can be vaporised successfully. Features ◆ Accurately controlled gas/liquid mixture (mass flow) ◆ Fast response ◆ High reproducibility ◆ Handles water， solvents， liquid mixtures ◆ Very stable vapour flow ◆ Flexible selection of gas/liquid ratio ◆ Lower working temperature than conventional system Vapour delivery applications ◆ CCVD (Chemical Vapour Deposition)， e.g. for hardening，thin film coating or planarization processes ◆Testing/calibration of analyzers with reference gasvapor concentrations ◆ T Toxic gas effects on protective clothing ◆ Analyzers with reference H，0 vapour concentrations ◆Humidification of fuels ◆ Anaesthetics 为什么使用可控蒸发混合系统可以减少食物浪费?众所周知，如果我们希望减少世界各地的食物短缺，就必须控制目前的食物浪费水平。不仅仅是西方，全球食物在供应链的不同环节都存在丢失或浪费的问题。今天的技术，如灭菌，可以帮助减少食物的变质。然而，严格的规范要求需要不断地改进这项技术。联合国粮食及农业组织的一份分析报告特别指出了一些现存的差异：在发展中国家，食物浪费和损耗主要发生在食物价值链的前端，可以追溯到在收割技术和储存、冷却设备方面的财务、管理和技术限制。在中等收入和高收入国家，食物浪费和损耗主要发生在供应链的后端。不同于发展中国家的情况，消费者的行为习惯在工业化国家中扮演重要的角色。      ‍那么，我们可以做点什么来改变呢? 综合食物损耗图表和上面的阐述，我们可以看到，投资生产技术是十分值得的，因其极大可能会增加包装食品的保质期。这将对食物浪费产生积极的影响。改善这些数据的方法之一是改进食品的包装灭菌技术，以减少变质和延长保质期。正是基于此，Bronkhorst控制蒸发混合(CEM)系统发挥了重要作用。Bronkhorst如何延长食品的保质期？包装灭菌以延长保质期不再是新鲜事，已经被应用了很多年。第一台用于牛奶的无菌灌装设备已于1961年推出。该技术在过去多年得到了巨大的改进，并且仍在不断革新。 Bronkhorst公司拥有多种类型的仪表，可为这一类灭菌工艺的创新提供支持。Bronkhorst可控蒸发混合系统(也称为 CEM)便是这一领域的巧妙创新，作为灭菌工艺过程的一种紧凑型解决方案。该紧凑型解决方案包括各种类型的仪表，如液体和气体流量计以及蒸发器。使用可控蒸发混合系统（CEM）进行灭菌Bronkhorst来自一家客户的一个挑战是:通过使用过氧化氢(H2O2)( 含35%H2O2和水) 混合物，净化用于灌装液体和奶油的纸盒和塑料包装。使用H2O2 混合物是一种很好的方法，因为它能高效杀死细菌，而且很容易被蒸发。Bronkhorst在这类解决方案方面拥有非常丰富的经验。为了以最少的浪费获得最佳生产，您需要：注入适量的H2O2混合物太多，最终产品被破坏。太少，残留的细菌太高。         避免对H2O2混合物进行脱气。      可控的蒸汽流量浓缩在包装内部。         限制流量。如果太高，就会增加灭菌后的干燥时间。         若使用通过集成科里奥利质量流量计的CEM系统生成蒸汽灭菌则可达最佳效果。由于H2O2混合物并不特别稳定容易导致物理性质的变化。将科里奥利质量流量计集成到CEM中，使质量流量所测量的介质物理特性不受限制。此外，由于科里奥利仪表能够测量介质密度，它可以用来监测浓度，从而观察H2O2 的质量。使用CEM系统具有实在的优势：•稳定的蒸汽温度•由于混合物的受控露点，凝结浓度稳定。•因为气体、液体和混合温度是可控的，所有以上都是可能的。顾客受益：•稳定的液体质量流量，即使物理性质不同•监控H2O2的浓度和质量•灭菌过程的监测和可追溯性•液体的质量流量控制•气体的质量流量控制•通过控制气体和空气混合物直接控制露点•增加使用日期•延长新鲜食物保质期