Wilk-Graphite GmbH
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Safe processing of highly aggressive media?
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This is our core competence. Since 2005, Wilk-Graphite GmbH has been supplying products and systems for handling and processing acids and other aggressive media to the international chemical, pharmaceutical and steel industries. Over 1,000 units have been installed in Europe to date.
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Process highly aggressive media more cost-effectively?
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Wilk-Graphite’s goal is to help make manufacturing sites competitive even under high cost pressures by reducing capital and maintenance costs for our customers.
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Process highly aggressive media in a highly innovative way? Example 1
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SiC block heat exchangers are an alternative to tantalum, titanium or Hastelloy heat exchangers due to their many advantages. They also outperform PTFE-impregnated graphite heat exchangers and SiC shell-and-tube heat exchangers with single tube sealing.
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Process highly aggressive media in a highly innovative way? Example 2
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A similarly revolutionary system is the ExtrAcid (TM) sulfuric acid concentration system. It generates process steam for energy recovery and significantly minimizes both capital and operating costs.
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Processing crystallizing media in a highly innovative way? Example 3
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The Archimedean Screw Crystallizer ASKR replaces batch processes with continuous processes, even with solids loading – with multiple benefits for users.
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The ranges:
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- Graphite products: Block and shell and tube heat exchangers and spare parts, sulfuric acid diluent, HCl synthesis, etc.
- SIC silicon carbide Block heat exchangers.
- New: ExtrAcid™ sulfuric acid concentration system based on SIC heat exchangers minimizes investment costs. Process steam generation for energy recovery drastically reduces operating costs.
- SCANVEX splash protection systems for pipe flanges
- Metallic apparatus, pressure vessels and stirred reactors from the German-Chinese joint venture
- RTC cleaning system for heat exchanger inner tubes according to AC Rädler, the solution for the toughest caking.
- ASKR Archimedean screw crystallizer/reactor: continuous process instead of batch process for quantum leaps in efficiency and product quality.
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How can we support you with redesign, process optimization and replacement needs?
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Simply contact us at info@wilk-graphite.com or by phone at +49 (0) 7621 422 1644. Thank you very much!
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Concentrates sulfuric acid (H2SO4) from any concentration up to 99.3% while halving the investment costs (CAPEX) and the required footprint
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Based on Wilk-Graphite’s SIC block heat exchanger.
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This patented system concentrates sulfuric acid (H2SO4) from any concentration up to 99.3%. It halves the investment costs (CAPEX) and the required footprint. At the same time, the ongoing operating costs (OPEX) are also reduced by producing process steam up to 10 bar as a by-product. The system is supplied worldwide as a ready-to-operate frame construction.
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MAX. OPERATING CONDITIONS
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• From 20 % to 96
• 300 °C & FV / 16 bar
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ADVANTAGES
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• Always 99.3 % output concentration, even with fluctuating input concentration
• Generates process steam
• Low investment, low operating costs
• Ready to use frame construction
• Low fouling
• Easy maintenance
• Small footprint
• No corrosion
• Modular construction
• H2O2 and F– comply with the limits
• Safety shields on all flanges
SiC silicon carbide block heat exchanger
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are an alternative to heat exchangers made of tantalum, titanium or Hastelloy because of their many advantages.
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They also outperform PTFE-impregnated graphite heat exchangers and SiC tube bundle heat exchangers fitted with O-rings. Due to their superior performance and durability, they pay for themselves in a short time.
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Manufactured from pure, directly and pressureless sintered SIC blocks (SSiC) – absolutely free from any free silicone ions
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Wilk-Graphite silicon carbide block heat exchangers are manufactured from pure, directly and pressureless sintered SIC blocks (SSiC). They do not contain any free silicone, which could reduce the chemical resistance. Therefore SSiC offers an almost universal chemical resistance with highest thermal conductivity. In addition, the extreme surface hardness protects against abrasion and enables high flow rates with maximum thermal efficiency.
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Extreme thermal conductivity is superior to metallic conductors
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The extreme thermal conductivity of SiC means that a SiC block heat exchanger with Ø 300 mm achieves the performance of a graphite heat exchanger with Ø 600 – 800 mm. It thus exceeds the thermal conductivity of all metallic materials.
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Self-cleaning design
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To optimize the service life, the SiC block heat exchangers are designed to be self-cleaning.
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High reliability
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– No O-ring seals
– Durable blocks
– Simple and proven design
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SSiC – essential physical properties
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– Roughness < 0.8 μm - Density: 3,12 g/cm³
– Thermal conductivity (20°C): 130 W/mK
– Tensile strength: 210 Mpa
– Vickers hardness: 19.2 GPa
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High purity application
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– Pure pressureless sintered silicon carbide (SSiC)
– No open porosity → No impregnation
– Helium leakage test (10-7 SI)
– FDA compliant
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Field of application
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– Universal chemical resistance
– No abrasion
– Bore diameter from 8 to 16 mm
– Pressure: FV / 25 barg
– Temperature: – 60 to + 500 °C
– Design according to ASME, PED and GB
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Low total cost of ownership
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– Easy maintenance
– Standard blocks
– No pipeline modifications required
– Self cleaning drillings
– Low contamination
– Rapid return on investment
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for the chemical, pharmazeutical and steel producing industries
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Technical Design
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Please feel free to contact us for new or replacement requirements. We design the heat exchangers optimally according to your specifications.
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Manufacturer of the products
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is Nantong Sunshine Graphite Equipment Technology – one of the largest graphite producers in the world – with many years of experience and extensive references. The apparatuses are manufactured according to international standards (AD 2000/DGRL, ASME, China Code) and have been proven in many hundreds of applications. Even in particularly corrosive applications, the apparatuses show excellent service life and thermo-dynamic performance.
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Quality
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The quality of the graphite was thoroughly tested by a leading German chemical company and approved for all sites.
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Service
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Wilk-Graphite offers a comprehensive technical service, which is provided locally in European workshops or directly at the customer’s site.
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Products
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• Carbex Graphite Reactor
• Cylindric Graphite Block Heat Exchangers
• Rectangular Graphite Block Heat Exchangers
• Tube and Shell Graphite Heat Exchangers
• Graphite Sulfuric acid diluent
• HCl synthesis
• Graphite internals and Raschig rings for columns
• Graphite spare parts of all kinds including blocks and heads for heat exchangers