ADCERAX® Silicon Carbide Heat Exchange Block is designed for block-type heat exchangers that operate under corrosive, high-temperature and high-velocity fluid conditions. Its high-purity SiC structure supports stable thermal conduction and uniform channel performance across cooling, condensation, evaporation and absorption processes. The material’s resistance to chemical attack and thermal deformation helps maintain consistent heat-transfer behavior throughout long-term industrial operation.
Product Features of the Silicon Carbide Heat Exchange Block
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High heat-flux capability: Its measured thermal conductivity exceeds 120–180 W/m·K, enabling rapid heat transfer even under steep temperature gradients. Two independent studies report that SiC maintains stable conductivity above 100 W/m·K in continuous service.
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Reduced exchanger footprint: Systems using SiC blocks require 20–40% less heat-transfer area than corrosion-resistant metals. This reduction allows smaller equipment envelopes while maintaining equivalent heat-exchange rates.
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Strong acid–alkali compatibility: Fully sintered SiC shows less than 0.1% mass change after immersion in concentrated H₂SO₄ and NaOH. Long-duration exposure studies confirm stable material behavior under continuous corrosive load.
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Low erosion rate under high-velocity flow: Channel-wall recession remains below 0.02 mm/year in abrasive or turbulent media, maintaining predictable flow characteristics over extended operation.
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Temperature capability up to 1300 °C: Dimensional deviation stays below 0.3% after repeated thermal cycling at high temperature, ensuring consistent channel geometry and pressure-drop behavior.
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High hardness and wear resistance: Vickers hardness values above 22–25 GPa allow the block to withstand abrasive or particle-laden flows without channel deformation. This hardness is significantly higher than graphite and metal alloys.
Technical Specifications of Silicon Carbide Heat Exchange Block
The Silicon Carbide Heat Exchange Block is engineered with a high-purity SiC matrix that maintains thermal stability, corrosion resistance and mechanical strength under demanding industrial process conditions. Its material behavior remains consistent in high-temperature, high-velocity and chemically aggressive environments, supporting long-duration operation in chemical, pharmaceutical, food-processing and thermal-system applications.
| Property |
Specification |
| Material Composition |
≥ 99% SiC |
| Thermal Conductivity |
120–180 W/m·K |
| Maximum Service Temperature |
1300 °C continuous |
| Density |
3.10–3.15 g/cm³ |
| Vickers Hardness |
22–25 GPa |
| Flexural Strength |
350–450 MPa |
| Compressive Strength |
> 2000 MPa |
| Thermal Expansion Coefficient |
4.0–4.5 ×10⁻⁶ /K |
| Open Porosity |
< 0.1% |
| Corrosion Resistance (H₂SO₄ / NaOH) |
Mass change < 0.1% |
| Oxidation Rate (800–1000 °C) |
< 0.05 mg/cm² |
| Erosion Rate Under Flow |
< 0.02 mm/year |
| Thermal Shock Resistance |
ΔT ≥ 250 °C |
| Chemical Compatibility |
Stable with strong acids/alkalis |
Dimensions of Silicon Carbide Heat Exchange Block
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SiC Heat Exchanger |
|
Item No. |
Diameter（mm) |
Height (mm) |
|
AT-THG-HRK2001 |
Customize |
Packaging of the Silicon Carbide Heat Exchange Block
Silicon Carbide Heat Exchange Block units are protected with reinforced carton layers and vibration-resistant internal padding before being secured in export-grade wooden crates. Each crate is stabilized on pallets to prevent impact during loading and long-distance transport. Moisture-barrier lining is added to maintain material integrity throughout international shipping and warehouse handling.
ADCERAX® Silicon Carbide Heat Exchange Block Resolves Critical Process Challenges in Industrial Thermal Systems
The Silicon Carbide Heat Exchange Block from ADCERAX® is designed for thermal operations involving corrosive fluids, high-temperature cycles and continuous-flow chemical processes. Its material structure supports stable heat transfer in cooling, condensation, evaporation, falling-film processing and high-temperature heat-recovery operations. The following application cases illustrate how the block addresses industry-specific engineering challenges that cannot be solved by graphite, metals or conventional ceramics.
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Silicon Carbide Heat Exchange Block in Acidic Chlorination and Sulfonation Cooling Systems
✅Key Advantages
1. Corrosion-stable heat-transfer surface
The SiC channel walls show mass change of less than 0.1% in strong acid exposure tests, even under elevated temperature. This stability keeps heat-transfer coefficients within a narrow variation band across thousands of operating hours.
2. Consistent thermal response under high load
Thermal conductivity in the range of 120–180 W/m·K allows fast removal of reaction heat during peak load periods. As a result, temperature deviations in outlet streams can be kept within ±2–3 °C in well-controlled chlorination or sulfonation circuits.
3. Channel integrity under fluctuating flow
Erosion rates below 0.02 mm/year at typical flow velocities preserve internal geometry over multi-year service. This supports stable pressure-drop profiles, with measured variations often remaining under 5% compared with initial commissioning values.
✅ ️Problem Solved
A chlorination line using graphite blocks previously experienced wall thinning and channel pitting within the first year of operation, leading to frequent temperature overshoot alarms and unplanned reactor slowdowns. Pressure-drop measurements showed progressive increases of more than 15% across the exchanger as internal surfaces degraded. After replacing the modules with ADCERAX® Silicon Carbide Heat Exchange Block units, differential pressure trends stabilized and remained within a narrow control band over several operating campaigns. Cooling capacity stayed close to design values, and the line operated without heat-exchanger-related shutdowns across multiple production cycles.
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Silicon Carbide Heat Exchange Block in Pharmaceutical and Food-Grade Clean Heating Systems
✅Key Advantages
1. Inert surface for fluid purity
Leach-out tests on the SiC surface show metal ion release levels below typical detection limits, often under 10 ppb for critical species. This behavior supports validated cleaning protocols and reduces the risk of out-of-spec batches linked to exchanger materials.
2. Stable performance under repeated cleaning cycles
After repeated acid and caustic cleaning cycles at temperatures up to 120–150 °C, dimensional change of the SiC block remains under 0.3%. Heat-transfer performance and pressure-drop curves stay aligned with initial qualification data, simplifying revalidation for regulated lines.
3. Low particulate shedding in sanitary flow
Particle counting in clean-media circuits indicates negligible increase in particle counts attributable to the SiC block, with values remaining close to baseline system levels. This supports compliance with hygienic standards in processes where allowable particle counts are tightly specified.
✅ ️Problem Solved
A food-additive plant previously relied on stainless-steel exchangers in an acid-lean cleaning regime and observed sporadic deviations in trace metal content across production batches. Investigations linked these variations to localized corrosion and roughening of internal metal surfaces after repeated cleaning cycles. When the heating section was converted to ADCERAX® Silicon Carbide Heat Exchange Block units, subsequent monitoring showed trace metal levels stabilizing within the lower part of their specification window. Batch rejection frequency decreased, and process engineers were able to maintain more consistent temperature control during heating and cleaning sequences.
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Silicon Carbide Heat Exchange Block in Metallurgical Exhaust Heat Recovery
✅Key Advantages
1. Geometry retention at furnace exhaust temperatures
The SiC block maintains structural integrity at continuous temperatures up to 1300 °C, with measured dimensional deviation under 0.3% after extended exposure. This allows exhaust heat-recovery systems to operate closer to their design thermal profiles over long intervals.
2. Resistance to abrasive particle erosion
Under dusty exhaust flows representative of metallurgical furnaces, surface wear measurements on SiC channels remain below 0.02 mm/year. Channel cross-sections stay within tight tolerance bands, limiting the drift in flow distribution across the exchanger.
3. Stable heat-recovery efficiency over time
Thanks to the combination of high thermal conductivity and low erosion, energy-recovery efficiency loss over multi-year operation can be restricted to single-digit percentage levels. This supports more predictable fuel consumption and temperature balance in upstream furnace and heat-treatment stages.
✅ ️Problem Solved
In a heat-treatment facility, metal-tube exchangers in the exhaust path showed noticeable distortion and scaling after repeated cycles at high temperature, causing a steady decline in recovered heat and irregular flow distribution. Maintenance logs recorded the need for partial exchanger replacement in intervals shorter than two years, with efficiency losses exceeding 10–15% before each intervention. After switching to ADCERAX® Silicon Carbide Heat Exchange Block modules, post-installation audits documented stable exhaust-side temperature profiles and significantly slower changes in pressure-drop and outlet temperature. The recovery section maintained near-design performance over extended campaigns, and replacement planning shifted from reactive interventions to scheduled long-interval overhauls.
User Guide for the ADCERAX® Silicon Carbide Heat Exchange Block
The Silicon Carbide Heat Exchange Block from ADCERAX® requires proper handling, installation and operational practices to maintain stable heat-transfer performance in corrosive, high-temperature and continuous-flow environments. This guide summarizes the essential precautions and usage recommendations that help ensure long-term reliability and predictable thermal behavior in industrial systems.
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Installation Preparation Guidelines
1. Verify system compatibility before integration
Each block should be checked against the process media, expected temperature envelope and flow characteristics to confirm suitability. The block’s surface must remain free of particulate contamination during pre-installation handling. All sealing surfaces should be inspected for cleanliness and flatness to prevent leakage paths once mounted.
2. Ensure correct alignment during assembly
Misalignment can increase mechanical stress concentration and raise pressure-drop variation across the exchanger. Support fixtures must hold the block firmly without creating point loads on the outer walls. Use installation tools designed to maintain uniform tightening torque along the mounting frame.
3. Maintain controlled handling conditions
Lifting equipment should distribute weight evenly to avoid impact or edge loading during movement. Protective padding is recommended when positioning blocks on metallic surfaces. Ambient humidity and dust levels should be kept low to ensure clean channel entry before final assembly.
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Operational Best Practices for Stable Performance
1. Monitor inlet and outlet temperature gradients
Excessive thermal shock may occur when temperature differentials rise beyond engineered tolerances, especially during rapid startup. Gradual ramp-up of thermal load helps maintain uniform heat distribution across channels. Continuous temperature monitoring improves the predictability of reaction-cooling performance.
2. Control flow velocity to maintain stable heat transfer
Abrasive or high-velocity streams must remain within system-specified ranges to preserve channel geometry. Flow instability may result in uneven thermal zones and elevated pressure fluctuations. A controlled velocity profile supports consistent thermal conductivity during long production cycles.
3. Prevent fouling and deposits in corrosive media
Process buildup can alter the internal heat-transfer surface and reduce exchanger efficiency. Periodic inspection of inlet filters helps reduce the entry of suspended solids. Maintaining stable chemical composition improves long-term corrosion behavior within the block.
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Cleaning and Maintenance Recommendations
1. Use compatible cleaning agents for corrosive-service systems
Only use media that do not chemically interact with SiC or damage sealing interfaces. Acidic or alkaline cleaning fluids should be rinsed thoroughly to prevent residual film formation. Repeated cleaning cycles should be logged to verify dimensional consistency over time.
2. Inspect channel uniformity during scheduled downtime
Visual or endoscopic inspection detects early signs of erosion, deposit buildup or structural change. Pressure-drop data should be compared to baseline values as part of routine maintenance. Any deviation beyond defined thresholds warrants timely preventive action.
3. Apply controlled drying procedures after cleaning
Rapid heating immediately after washing can induce localized thermal gradients. Low-temperature drying followed by gradual ramp-up improves thermal stability and prevents stress accumulation. This practice protects long-term mechanical integrity during repeated cycles.
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Storage and Handling Precautions
1. Store blocks in dry, vibration-free environments
Moisture fluctuations may compromise packaging integrity or introduce contaminants. A stable, low-humidity environment extends the service readiness of stored components. Wooden crates with moisture-barrier lining are preferred for long-term storage.
2. Avoid stacking without structural support
Direct stacking may apply unintended compressive loads and risk micro-fractures at the edges. Use pallet structures or spacing frames to distribute weight. Handling personnel should follow non-impact lifting protocols at all times.
3. Protect channel entrances from dust intrusion
Seal openings with protective caps or film to prevent airborne contaminants from settling inside. When blocks must be moved frequently, ensure that protective layers remain intact. Maintaining clean channels ensures stable flow distribution when the unit enters service.
