Thermotechnology

The brewery company, Oettinger Brauerei, modernises its central energy generation Designing steam generation more efficiently with Bosch boiler technology

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  • October 02, 2014
  • Thermotechnology
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press release

Oettinger Brauerei has modernised its steam generation at its North Oettingen site with Bosch boiler technology to the latest standards for efficiency and environmental protection. The modernisation involved an economizer, firing systems with speed and oxygen control, intelligent boiler control technology and other system accessories from Bosch Industriekessel. Thanks to these measures, the brewery has reduced its CO2 emissions by more than 650 tonnes per year and also its energy usage, which means an annual reduction in fuel costs of around 20 percent.

The two three-pass boilers under the Loos brand name (which has now become Bosch) have been providing the brewery company with steam very reliably since 1991 and 1993. One of the boilers had not yet been equipped with an economizer. In order to use the heat potential in the boiler flue gases, which are around 230 degrees Celsius, an economizer was installed downstream from the steam boiler as part of the modernisation. The flue gas temperature is reduced by almost 115 degrees Celsius through preheating the feed water. This increases the boiler efficiency by around six percent and reduces the fuel usage, as well as helping to keep emissions low.

The replacement of the existing dual burners with modern, modulating natural gas burners resulted in a further increase in efficiency. Thanks to the use of speed control, the motor speed is reduced depending on the burner output. The electrical power consumption in the partial load range is therefore considerably lower – and at the same time there is also a significant reduction in the sound pressure level. Even the oxygen content in the flue gas is continually recorded. If this is too high, making combustion ineffective, the volume of combustion air is reduced. This optimises the efficiency of the burner system and reduces the environmental impact as well as energy costs.

In order to guarantee that there is always the optimum water quality in the boiler, automatic desalting and blow-down devices were retrofitted. The installed feed water regulation modules ensure that there is a constant water level in the boiler. In addition to increasing the degree of automation, these measures provide a more even level of operation with less material stress, as well as ensuring that energy losses are reduced.

Thanks to the integration of the boiler controls BCO, all the available control functions can be called up, and the actual and setpoint values can be visualised or altered on the touchscreen display. With the integrated software Condition Monitoring basic, the operating company benefits from a consistently high level of efficiency and availability for the boiler system. The widest range of data, such as for example flue gas temperature, desalting quantity or boiler load, is analysed and evaluated by the forward-looking monitoring system for operating conditions, and the data is then depicted clearly for the operating personnel by means of a traffic light model. The teleservice connection offers additional support and rapid elimination of faults.

The consulting engineers, Harald Moroschan from Muhr am See, were entrusted with the planning of the modernisation project. The plant construction company, Sell Haustechnik GmbH from Helmbrechts, installed the equipment.

Thanks to the project experience it has gained from supplying over 110,000 systems worldwide, Bosch offers the drinks industry individually tailored boiler systems for efficient and environmentally-friendly energy provision. You can find out all you need to know about boiler system technology and other solutions from the areas of combined heat and power, waste heat utilisation, heat pumps and solar thermal energy on the Bosch stand at the BrauBeviale trade fair in Nuremberg from 11 to 13 November 2014, in Hall 4, Stand 313.

Bosch Industriekessel GmbH, part of the Bosch Thermotechnik GmbH, is setting the benchmark for industrial boiler technology since 150 years. Boiler systems for steam, hot water and heating, manufactured to customers' specification, provide efficient heating and process heat for all applications. Boiler house components, which are modular in design and perfectly coordinated, together with intelligent regulation and control technology, significantly simplify the planning, installation and commissioning of the complete system. Comprehensive service support from one source rounds off the innovative product portfolio.

Additional information is available online at www.bosch-industrial.com.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 375,000 associates worldwide (as of December 31, 2015). The company generated sales of 70.6 billion euros in 2015. Its operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 440 subsidiaries and regional companies in some 60 countries. Including sales and service partners, Bosch’s global manufacturing and sales network covers some 150 countries. The basis for the company’s future growth is its innovative strength. Bosch employs 55,800 associates in research and development at 118 locations across the globe. The Bosch Group’s strategic objective is to deliver innovations for a connected life. Bosch improves quality of life worldwide with products and services that are innovative and spark enthusiasm. In short, Bosch creates technology that is “Invented for life.”

Additional information is available online at www.bosch.com, www.bosch-press.com, http://twitter.com/BoschPresse.

PI8726 - October 02, 2014

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