杜拉革Durag发布新款粉尘仪产品D-R 909

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     Hamburg, August 9 2023 - Our new D-R 909 dust measurement system scores particularly well in regulatory emission monitoring. This is mainly due to the patented measuring cell D-R CL, which measures scattered light. In the interview, our product manager Mathias Klostermann provides more information about the special features of the QAL1-approved measuring system of the DURAG GROUP.           
      德国汉堡，2023 年 8 月 9 日 - 我们新的 D-R 909 粉尘测量系统在监管排放监测方面尤其出色。这主要是由于获得专利的测量池D-R CL，它可以测量散射光信号。在采访中，我们的产品经理 Mathias Klostermann 详细介绍了 DURAG 集团经 QAL1 认证的测量系统的特殊功能。

     Mr. Klostermann, can you describe the new D-R 909 extractive dust measuring system in one sentence?
     Klostermann先生，您能用一句话描述一下新的D-R 909抽取式粉尘测量系统吗？
    The D-R 909 impresses with its patented measuring cell, automatic control functions, high availability, low service and operating costs, as well as installation that is as simple as it is flexible.
     D-R 909 以其获得专利的测量元件、自动控制功能、高可用性、低服务和运营成本以及简单灵活的安装而令人印象深刻。
     Which areas of application are typical for the D-R 909?
      D-R 909 的典型应用领域有哪些？
      The dust measuring system of the latest generation can be used in regulatory emission monitoring. Wherever wet flue gas is present or changing operating conditions can lead to the formation of liquid water in the flue gas, the D-R 909 is the right measuring system. Waste to energy plants or coal fired power plants that rely on wet scrubbers for flue gas cleaning are possible application fields.      最新一代的粉尘测量系统可用于监管排放监测。只要存在湿烟气或不断变化的操作条件会导致烟气中形成液态水，D-R 909 都是正确的测量系统。依靠湿式洗涤塔进行烟气净化的废物发电厂或燃煤发电厂是可能的应用领域。
      What technology is the D-R 909 based on?
      D-R 909 基于什么技术？
      The D-R 909 combines extractive sampling, preparation of this sample and dust measurement in one instrument. The sample preparation is designed to correctly detect the dust content even in samples that are completely saturated with water vapor. This also works with small water droplets, comparable to fog. The liquid present is evaporated in order to subsequently detect only the scattered light from the dust particles. The forward scattering principle used in the measuring cell provides very precise measurement results, especially for small and medium dust concentrations.
      D-R 909 将抽取取样、样品处理和粉尘测量结合在一台仪器中。样品处理旨在正确检测粉尘含量，即使在完全被水蒸气饱和的样品中也是如此。这也适用于小水滴，可与雾相媲美。蒸发存在的液体，以便随后仅检测来自灰尘颗粒的散射光。测量池中使用的前向散射原理可提供非常精确的测量结果，特别是对于中小型粉尘浓度。
     Can you describe the functionality in more detail?
     您能更详细地描述该功能吗？
     The heart of the system is our patented measuring cell. In this cell, a red laser beam is directed at a defined measuring volume. If a dust particle flies through this measuring volume, the light from the laser is scattered onto a light-sensitive detector. The more particles fly through the measurement volume, the higher the measurement signal. The device then converts the measurement signal into the corresponding dust concentration.
     该系统的核心是我们获得专利的测量池。在这个测量池中，红色激光束被引导到定义的测量体积。如果尘埃颗粒飞过该测量体积，则来自激光的光会散射到光敏探测器上。飞过测量体积的颗粒越多，测量信号就越高。然后，设备将测量信号转换为相应的粉尘浓度。
     What makes this measuring cell so special?
     是什么让这款测量池如此特别？
     The measuring cell detects the smallest light intensities, but is hardly susceptible to interference. Both properties are usually at odds with each other. We have succeeded in raising the bar with a new patented concept. We achieve this with systematic compensation of changes in optical interfaces and automatic background light correction.
     测量池可检测最小的光强度，但几乎不容易受到干扰。这两个属性通常相互矛盾。我们成功地通过新的专利概念提高了标准。我们通过系统补偿光学接口的变化和自动背景光校正来实现这一目标。
     What should plant operators expect in terms of operation and maintenance?  
     工厂运营商在操作和维护方面应该注意什么？
      A growing number of our customers are considering not only the investment costs for procuring and installing the measuring systems, but also the maintenance effort and operating costs. The total cost of ownership should be as low as possible. For us, avoiding deposits caused by measuring gas was a very high priority. The innovative design of the D R 909 fulfills this requirement sustainably. This is also confirmed by our experience so far. We have greatly reduced the time required for regular maintenance and performance checks. This is ensured by the automatic control functions and the easy-to-perform linearity test. The power consumption of the entire system reaches a market-leading low level.
     越来越多的客户不仅要考虑采购和安装测量系统的投资成本，还要考虑维护工作和运营成本。总拥有成本应尽可能低。对我们来说，避免因测量气体而造成的沉积物是一个非常重要的优先事项。D-R 909的创新设计可持续地满足了这一要求。我们迄今为止的经验也证实了这一点。我们大大减少了定期维护和性能检查所需的时间。这是通过自动控制功能和易于执行的线性测试来确保的。整个系统的功耗达到市场领先的低水平。

Measuring principle 测量原理	Extraction of sample gas, dilution and heating for evaporation of water droplets, forward scattering, single-sided installation 抽取样气，稀释和加热以蒸发水滴，前向散射，单面安装
Measuring variable 测量变量	Scattered light units, calibratable as dust concentration in mg/m3 散射光单位，可校准为粉尘浓度，单位为 mg/m3
Measuring range 测量范围	Minimum 最小0 … 5 mg/m3 Maximum 最大0 … 200 mg/m3
Certified measuring ranges 认证测量范围	0 … 7,5 mg/m3; 0 ... 15 mg/m3; 0 ... 45 mg/m3; 0 ... 100 mg/m3
Ambient conditions 环境条件	Installation location: Indoor or outdoor installation* 安装位置：室内或室外安装 Temperature温度: -40 … +60 °C
Operating conditions 操作条件	Temperature温度: 0 … 160 °C Relative humidity: 0 … 100% and maximum 70 g/m3 water as aerosol 相对湿度：0 ...100% 和最大 70 g/m³ 水作为气溶胶Relative pressure: -50 … +50 hPa** 相对压力： -50 ... +50 hPa**
Interface接口	Analog output: 1x 4 … 20 mA, maximum 500 Ω, potential-free 模拟输出： 1x 4 ...20 mA，最大 500 Ω，无电势Analog input: 1x 4 … 20 mA, maximum 250 Ω, potential-free 模拟输入： 1x 4 ...20 mA，最大 250 Ω，无电势Digital output: 2x NC/NO, maximum 60 V_, 30 V~, 0.5 A 数字输出：2x 常闭/常闭，最大 60 V_，30 V~，0.5 A Modbus RS 485 RTU USB
Inner duct diameter管道内径	Minimum: 0.2 m 最小0.2m
Operation and display 操作和显示	Status LED状态指示灯 Software D-ESI 100***软件 D-ESI 100***Optional: Control Unit D-ISC 100可选：控制单元 D-ISC 100
Control functions 控制功能	Automatic zero point and reference point measurement, automatic contamination measurement and compensation 自动零点和参考点测量，自动污染测量和补偿
Light source 光源	Laser, class 2 in accordance with EN 60825-1, < 1 mW at 650 nm 激光，2 级，符合 EN 60825-1 标准，650 nm 时< 1 mW

* Weather protection required for outdoor installation

** Depending on flue gas velocity and operating mode

*** Enables remote access via web interface, requires PC with Windows operating system

* 室外安装需要防风雨保护
** 取决于烟气速度和运行模式
*** 通过 Web 界面启用远程访问，需要装有 Windows 操作系统的 PC