Photo by NETZSCH Pumpen & Systeme GmbH
Grinding, pumping, dosing, mixing – there are a multitude of tasks associated with conveying liquid media, especially in the wastewater and environmental sector. Smooth processes are essential here, just as they are in biogas production. System malfunctions cause significant problems. NETZSCH Pumpen & Systeme GmbH therefore offers a great variety of perfectly coordinated pump solutions, accessories and services for these sectors from a single source.
These range from various types of pump, such as those with flange mountings, a wide variety of designs of the hopper pump, mixing pumps, immersion pumps and TORNADO rotary lobe pumps, through to the overhaul of ageing pumps, and also include NETZSCH macerators and accessories, such as the aBP module for preventing bridging and the dry running protector. The whole product range with its flexible configurations and application options will be presented at this year’s IFAT.
NETZSCH has been designing and manufacturing pumps and macerators in Waldkraiburg, Bavaria for more than 60 years. At first the company specialised in progressing cavity pumps, but over time it has also developed into an expert in rotary lobe pumps. Customers are provided with comprehensive advice that is tailored to their requirements in terms of choosing the appropriate pump for a specific application. NEMO® progressing cavity pumps are particularly suitable for pressures up to 48 bar (higher pressures on request) and for media with a high dry matter content, such as dewatered sludges or liquid manure, silage and biowaste for biogas fermentation.
Their conveyance principle is based on a rotor which turns in an oscillating motion within a fixed stator. The geometrical mating means conveying chambers are formed between the rotor and the stator. As the rotor turns in the stator, the medium is transported from the inlet to the discharge side in these chambers. This is achieved with stable volumes and pressure, irrespective of the consistency or viscosity of the medium. The addition of a screw conveyor is possible for particularly viscous media. One of the pumps used for biogas production is the NEMO® B.Max® mixing pump. It has specially positioned feed tubes for liquid manure and so optimises the pre-mixing of different substrates within the pump. The homogenised substrate then goes into the fermenter where it can immediately be processed by the bacteria. Formation of scum is prevented. This reduces the effort involved in mixing in the fermenter.
The innovative iFD stator 2.0 for NEMO® progressing cavity pumps makes maintenance particularly easy: the fact that the elastomer is not vulcanised into the stator, but just positively clamped, means it can easily be taken out when worn and disposed of as sorted waste. It is just as quick to install and fix a new stator, as it can easily be pushed onto the rotor while not tensioned. Its development was promoted by the “Environment” Trust. In addition, the design means lower start-up and operating torques are needed and energy costs are therefore reduced.
Robust pumps for difficult conditions and media
The compact, robust TORNADO® rotary lobe pump is available for areas with confined spaces or for mobile applications. Its large free ball passage means it can also handle lumpy media without any risk of clogging. With a pumping capacity of up to 1,000 m³/h, the TORNADO® even deals with large quantities of wastewater.
With the T2 model there is the possibility of flange mounting the motor above the conveying chamber as well, which then gives you one of the shortest pumps on the market. This design is also particularly well suited to being mounted onto a trailer (TORNADO® Mobile) or onto a moving device and to being moved from one operating location to another as a mobile unit.
T2的皮带驱动器可确保它非常安静地运行，并且在没有油的情况下运行，并确保您避免避免使用常规同步齿轮盒可能发生这种情况。皮带驱动器的特殊特征是其双齿皮带，可实现旋转裂片的功率传输和同步。
Both types of pump have in common that they are in each case tailored to the characteristics of the media and the conveying tasks in terms of the design and selection of materials. This means long, low-wear operation is ensured. In addition, the direction of rotation can be reversed on NEMO®and TORNADO® pumps and their conveyance volumes are proportional to the speed. The latter feature gives high dosing accuracy.
The design of both types of pump focuses on simple maintenance and cleaning. For example, after the pump cover has been removed, the T2’s rotary lobes and housing insert can easily be disassembled, as free access to the pump chamber is ensured from flange to flange. The pipe flange do not have to be removed either. The rotary lobes are attached outside the pump chamber.
Accessories enable flexible tailoring
根据应用程序的要求，可以通过各种配件来补充泵。其中包括ABPMotule®，它可以防止在填充压实或易碎的介质时进行桥接。为了实现这一目标，将支撑放在泵的料斗上，该泵料斗在每个侧壁的内部都带有不锈钢发出的车轮。这些是使用两个螺钉齿轮独立旋转的反击。该过程产生的剪切力在开始形成并在发生任何障碍物之前就撕裂材料分开。NEMO®泵可以配备定子保护器，以保护定子免受干燥的损坏。也有接触测压器来测量过压或真空，压力传感器，频率逆变器，移动设备和控制系统。
Removing impurities efficiently
NETZSCH offers various macerators for the reliable conveyance of media with coarse impurities, like the ones that are frequently found in wastewater, but also for macerating substrate in biogas production. The compact M-Ovas® macerator for coarse materials works with a cutting plate made of hardened steel that can be used on both sides and a knife head with hard metal blades which is supported by a flywheel. Dense materials, for instance stones, are caught in an integrated collector-separator as they pass through the system and can be removed via its separate cleaning and drainage aperture. If the solids are particularly large or robust, then the NETZSCH twin shaft macerator is used instead. With this, the cutting units are designed as single-part cartridge elements, each with six knives made of special steel along with six spacing rings, which can easily be replaced as a unit for maintenance. In addition the system can be self-cleaning, using the very slow, variable speed. Its flow rate is up to 300 m³/h with a dry residue content of up to 10 percent.
Netzsch Service团队在购买泵之前和之后都在为客户提供所有担忧。因此，该公司为新设备提供现场培训课程，并为调试提供支持。如果遭受损害，专家会帮助进行故障排除，或确保可以通过其国际分支机构在最短的时间内在世界各地交付原始备件。即使是为较旧的系统，也可以提供适当的组件，或者如果需要，这些组件可以通过新技术升级。该服务结合了广泛的产品组合及其应用程序选项，有助于增加服务寿命，降低运营成本并为每种媒介找到适当的泵。
NETZSCH Pumpen & Systeme GmbH will be exhibiting its products in May at IFAT 2014. The “Environment & Energy” team is looking forward to using exhibits to show and explain innovations and special technical features of their products to customers and potential customers in the field of pumping technology.
有关更多信息，请访问：www.netzsch-pumpen.de
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