Application of VIPA Control System in Water Purification

Due to the special geological environment, limestone formations surround the small town of Osterburken in Neckar-Odenwald, Germany. Only these extremely chalky well waters can be used as water sources. In order to meet domestic water requirements and protect household appliances and pipes, the city has been building the most modern softened water plant since 2010. Kuhn Ltd. from Höpfingen is responsible for equipping such factories. The company has gone through three generations and is dedicated to the recycling of drinking water and wastewater treatment. Their services include pipeline construction, technical equipment and complete electrical and control engineering. The project manager Thomas Schäfer pointed out that "The technology used in Osterburken has absolutely no chemical additives added to drinking water. The nanofiltration technology we use here filters and dissolves water-hardening substances dissolved in water by infiltration." The equipment's processing capacity reached 650 cubic meters / 14 hours ---- this is the average daily demand of the city of Osterburken, the hardness of water dropped from 26 ° dH to 11--13 ° dH. For safety reasons, many devices require redundancy. For example, each pump has an extra pump reserve. The factory records all the filling amount, pressure, flow rate, pH value and water turbidity, and displays it on the control panel of the control cabinet. The deviation of the conductivity will reflect whether the salinity of the water changes early-this means that the filter The diaphragm may be damaged.

Easy programming, easy control The special requirement of this factory is to convert the hardness of water into a settable parameter and adjust it as required. Due to dynamic storage management of drinking water and variable flow management during softening, optimal control and timely and accurate switching are required. We have adopted the central controller CPU314-6CG13 based on SPEED7 technology, it contains Profibus interface and Ethernet interface, it is convenient to communicate and program with the control panel, thus can save the expensive communication processor, connect with CPU directly. SPEED7 technology is one of the fastest control systems based on Siemens STEP7 programming. With this technology, a large number of program modules and complex control software can easily complete a cycle process in 2 milliseconds with a compact CPU. In addition, this CPU also integrates a number of digital and analog inputs, output functions, including eight-way switch, can be used as an input or output channel, CPU operation does not require an additional memory card.

The remaining sensors and actuators are connected to the controller via Profibus. The compact SLIO module can be installed in a small space in the control cabinet, connecting control signals to the main CPU, and supports multiple bus protocols.

In this project, Kuhn designed three decentralized IO stations: central control cabinets, nanofiltration equipment and removable cleaning equipment, respectively, connected via Profibus. The SLIO module has a stepped spring snap connection for quick wiring. The label strips and LED diagnostics correspond directly to the signal path to ensure easy and accurate evaluation of faults. Due to the distributed installation, the wiring work is minimized.

All aluminum alloy shell VIPA12 inch touch screen is very suitable for this occasion application, it provides pre-installed WindowsCE6.0 operating system, and running version Movicon11, it integrates 128MB working memory and 2GB user memory, with sufficient hardware resources to meet A huge number of tagname requirements. The touch screen is connected to the PLC via Ethernet. In addition to the on-site display and on-site operation, the touch screen can also store process data. In addition, it also has a complete alarm management function that can be activated and send out messages when a limit is exceeded or a fault occurs. Of course, it also provides a rich parameterizable graphics library, as well as a variety of historical trend charts that can record and observe the status of different objects over long periods of time.

All components, including from the PLC, remote IO, and operation panel are all provided by the VIPA company: “This makes it easy for us to build plant control systems, and a single supplier provides us with more timely and thoughtful support” project leader. Thomas Schäfer emphasized.

Remote access to all unconventional data will be transferred directly from the factory to the control point, which contains 5 communications and 40 sites from the well room to the reservoir. This type of connection is established via the GPRS modem in the control cabinet. Based on the messages sent by the system, the technicians are dispatched to the factory site or directly controlled by remote access. For example, the spool valve can be closed remotely or the pump can be switched on or off as required.

The system updates the measured values ​​every 15 minutes regularly. In addition, it can be queried at any time. All current data can be instantly displayed. All device parameters can also be viewed via the Internet. This allows technicians to view the immediate operational status on the spot through their own computers or smartphones even on a weekend shift, and immediately use the appropriate tools and spare parts to solve the problem on site. In addition, all data is stored on the memory card of the VIPA touchscreen, so data in the past 24 hours can be queried at any time.

The entire demineralized water process consists of many links, from the water pump in the well room to the drinking water network. All control processes must be stable and reliable to ensure a constant and uninterrupted supply of drinking water. VIPACPU's powerful features are characterized by extremely fast operating speeds, serialized large memory and flexible memory management, which can be easily extended via MCC cards, built-in Ethernet interface for communication and programming, and remote signals via Profibus and SLIO systems. The connection; together with the visual operation of the 12-inch touch screen, constitutes a complete control system that guarantees ideal trouble-free operation of the softened water plant. Project Manager Thomas Schäfer said, “We have used the VIPA system for many years in the water plant automation and all technicians are skilled in using the VIPA controller. In addition, we highly appreciate the attention paid to the VIPA team. Sometimes we Even Friday night's technical support from VIPA engineer Mr. Mark Kohl will be received. To a certain extent, he is also an expert in mobile applications.

High Speed Stacking Door

Material Selection:

1. Frame: 2MM thicknesses cold-roll Stainless steel.

2. Motor: Germany SEW brake motor (outer), power 0.75KW, power supply 220V.

3. Control system: Imported Japan Mitsubishi converter and PLC to control of electric box (150%1HZ)

4. Opening & closing speed: 0.6-1.5m/s (adjustable).

5. Safety Device: Korea Photocell Sensor, emergency stopping reaction when sensing obstacles.

6. Curtain: France high-density polyester fiber and the surface coating processing, thickness 0.8MM, variety colors can be chose: Red, yellow, blue, green, orange, gray, white, transparent, etc. Tensile strength: 4000/3500N/5cm, tear strength 600/600N. Fire-proofing level: German standard DIN75200 Usage temperature: -30 ° C +70 ° C.

7. Wind resistant: The Aluminium alloy Reinforce Girder to increase wind resistant effect.

8. Curtain replacement function: Aluminium alloy Reinforce Girder is loaded between 2 pieces Curtain, can be replaced easily if any curtain broken, save your cost.

9. Transparent window: 1.2MM thickness transparent PVC window, size and location is up to your request, more safer.

10. Seal: Seal brush are Installed inside the guides, and the special bottom design, to fit any uneven ground.

11. Cotrolling way: Push button + radar sensor, very convenient.

12. Limiting Switch: Mechanical limiting switch, easily and exactly.

13. Emergency STOP: With emergency stop button on control panel, can stop easily by

Hand once disconnect or accident

14 Fault recovery function: All Hongfa's production is with fault recovery function, system will self-recovery after power cut off.

15. Delivery time: About 7 business days with contract and deposit confirmed.

16. Pyament item: 50% before production, and the other 50% before shipment.

17. Warranty Details: We provide 12 months warranty for all doors and accessories (except man-made disasters, Irresistible natural disasters, ect^).

We have many professional engineers with rich experience, qualified products, perfect service system, and good cooperation relationship with many famous companies.

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