Heat recovery and energy optimization in glass production at Stölzle
Stölzle Oberglas produces energy-intensive glass and has therefore relied on heat recovery for many years. The existing heat exchanger was contaminated by heavy deposits and was only able to provide a fraction of the intended output. The aim of the project was to significantly increase energy efficiency and to completely feed the waste heat from the glass tank back into the district heating network.
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- sector: Buildingmaterials and glass
- customer: Stölzle Oberglas GmbH
- location: Köflach, Austria
- Category: production infrastructure
- solution: Extraction and filter technology, Utilization of waste heat
- KPIs: Heat extraction up to 1.4 MW, 6,000,000 kWh energy supply per year
- Year of execution: 2024
Project details
The old heat exchanger was heavily clogged by deposits and was only able to utilize around 200 kW of heat from glass production. INFRANORM® replaced the entire shell-and-tube heat exchanger and thus restored the original output of around 1.4 MW. During the replacement, two cranes were used to safely carry out the precise lifting and assembly work. The downtime remained minimal. Through the new heat exchanger The annual energy supply increases by six million kilowatt hours and profitability increases significantly.
The result: Maximum energy efficiency, significant cost savings and an important contribution to the company's sustainability goals.
“Optimizing the heat exchanger is an important step towards sustainable production. The significantly increased heat recovery confirms the success of the exchange. ”
Volker Skrbinjek
Project manager, Stölzle Oberglas GmbH
The customer company
Stölzle Oberglas has been manufacturing high-quality packaging glass for pharmaceuticals, cosmetics, spirits and food since 1871. The company is one of the leading European manufacturers of sustainable glass packaging and is intensively involved in research, digitization and environmental protection.
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synopsis
The project at Stölzle Oberglas shows how significant efficiency potential can be exploited through the targeted use of modern energy technology. INFRANORM® has answered the challenge of upgrading the heavily polluted heat recovery plant with a sustainable and powerful solution. Our service included the complete replacement of the shell-and-tube heat exchanger, including coordination of lifting and installation work.
The profit for Stölzle top glass:
- Restoring full heat recovery of around 1.4 MW
- Six million kilowatt hours of additional energy supply annually
- Minimal plant downtime during implementation
In short: A modern heat recovery solution that protects energy, costs and the environment in equal measure.