Water treatment renovation project in Gross-Enzersdorf, Austria

Foreword:Corrosive steam, mechanical loads, technological innovations, all this means that a water treatment facility must be renovated mechanically and electronically within a few years of operation. Austrian municipalities Choose B&R technology as the control core of water treatment equipment. The benefits brought by this choice are: higher system availability” title=”availability” > availability, lower operating costs and satisfactory operation.

In the town of Gross-Enzersdorf, on the outskirts of Vienna, since 1991 a water treatment plant in the city has maintained a continuous capacity of 140,000 people. In addition to wastewater treatment for 10,000 inhabitants, the factory is also responsible for the wastewater treatment of a large food processing factory in Marchfeld. The system must have high availability and security.

However, the system began to experience operational problems shortly after it was completed, and within the first few months, problems with coordination among multiple suppliers resulted in imperfect operation and delays. In the following years, with the intrusion of harmful gases, electrical and mechanical failures, wear and tear (high sediment content in sewage – alluvial areas of the Nile River Basin in Marchfeld) and unreasonable factory structures, The frequency of failures is increasing. At the same time, with the emergence of advanced technology, some Electronic or electrical equipment has been unable to keep up with the needs of technological development. In addition, “with the emergence of new application standards and regulations, the requirements for the system are getting higher and higher”, said the town councillor, Mr. Hans Jurgen Hegendorfer, who was the factory manager in the early days of the project, so this equipment quite understand.

One supplier for the whole package

In view of the situation at that time and the consideration of the “Millennium Bug” problem, the parliament and relevant management departments decided in 1997 to modify the electrical control system of the equipment” title=”Control System”>Control System, “because in the original plan, there were many Many suppliers were involved in the construction of the project, so companies often shirk their responsibilities when things go wrong. That’s why we reduce the number of suppliers and focus all our efforts on one company. “Based on the results of this discussion, MTS was finally authorized to undertake the planning and implementation of the new control system, as well as the automation technology” title=”Automation Technology”>Automation Technology Maintenance and Support Partner. MTS, a facility management company specializing in electronic measurement and control technology, worked with plant management to define the basic tenets of the project:

● Reduce the number of suppliers

● Reduce operating costs

● Increase reliability

A thorough mission analysis is followed by implementation. With the help of B&R, MTS company and related operators continuously update their automation technology step by step, “We choose B&R not only because they are a supplier leading the product direction, but also they can provide related products based on a platform, we need A complete and trouble-free modern system.” Martin Steiner (Managing Director and Director of MTS Corporation) said of their decision: “Innovative concepts like Ethernet Powerlink are the core criteria of our decision, this modernization The solution allows us to smartly connect over long distances over the WAN without having to reconnect or replace expensive cables.” But the advantages of the new solution go beyond these: for example, another reason for government authorities to implement B&R’s technology It is a recently completed box-type filter press project, which has solved the problems of cost saving and system optimization.

Martin Steiner, General Manager and Director, MTS Systems Integration Company

We choose B&R because they offer a complete product line from one manufacturer, which is exactly what we need for a trouble-free system retrofit.

Case of Box Filter Press: Reliability Improvement, Cost Reduction

Solving the problem of repeated shutdown caused by the corrosive damage caused by the deterioration of the equipment environment is the main problem to be solved in the whole process of the transformation of the control system in the box filter press and the fermentation tower.

The idea of ​​discarding all electromechanics (with the exception of the emergency stop function) was a very challenging task for the retrofit task, and the team led by Mr. Martin Steiner used B&R Power Panel 220 series touch panels with IP64 protection and integrated CPU.

The task is completed, the main controller located in the electrical cabinet of the box filter press – a 15-inch Power Panel panel is mainly responsible for controlling the input and sewage sludge discharge. In the control room, the Power Panel panel communicates with the upper main panel via Ethernet. station controller (

B&R2005 series) connected.

“In addition to the elimination of the mechanical switch, the Power Panel greatly increases user friendliness”, explains Mr. Martin Sterner. As long as safety factors allow, the control room personnel and field operators can see the same process graphic, and, because the switch is connected to the Various functions are controlled by software, and some minor modifications can be completed quickly and without trouble.

Each box filter press is operated on-site with a 10.4-inch Power Panel. The panel-integrated CPU also controls the corresponding filter press. Technicians can connect to the switch station in each electrical cabinet through X2X Link technology. In the switchyard, the B&R X20 was used as I/O” title=”I/O”>I/O System,” At first we were not inclined to use the X20 system, but when it was first in hand, I started Changed my opinion”, Martin admits, “Personally, I learned to program in a very short time and was able to complete I/ O connection, that’s the root cause of conquering me. “The business manager of MTS company further described the highlights of the system from the programmer’s point of view: “The software depicts a real graphic to the module, using the Display

The module’s switches act as a virtual Model system where the user can control each input on or off without changing specific values ​​in the software, which undoubtedly simplifies the testing of the system. “

X20The system ensures simple commissioning

Before signing the electrical cabinet outsourcing manufacturing contract, MTS experts checked the entire assembly system with the support of the intelligent software and hardware functions of B&R products, “After the electrical cabinet is installed in the box filter press, all we have to do is Connect the I/O, and the final debugging is a simple and quick thing.” Mr. Martin said happily.

Gross-Enzersdorf sewage treatment plant for 140,000 people

The operator is also very satisfied with the result. Mr. Hans Juergen Hegendorfer, the deputy mayor, affirmed: “The modern and convenient equipment runs stably, and the operation and maintenance costs are greatly reduced – a really suitable choice for our city.”