Case Studies on the Application of Silicone Rubber Heaters in the Petrochemical Industry
Product Overview and Technical Features
Silicone rubber heaters are thin, flexible electric heating elements manufactured by embedding nickel-chromium alloy heating wires or etched metal foils into a composite insulating layer of silicone rubber and fiberglass cloth. The standard thickness typically ranges from 1.5 mm to 2.0 mm. Their operating temperature range is -60°C to 250°C, and the power density can be customized according to application requirements. Silicone rubber offers excellent water resistance, moisture resistance, chemical corrosion resistance, and weather resistance and aging resistance.
The petrochemical industry involves the heating of large volumes of high-viscosity materials, freeze protection and thermal insulation for piping equipment, as well as explosion-proof heating requirements in hazardous environments. This places strict, even demanding, requirements on the flexibility, temperature uniformity, chemical resistance, and safety ratings of heating elements.
Key advantages include:
· Flexible Conformity: Silicone rubber offers high flexibility, allowing for tight installation that conforms to the curved and uneven surfaces of equipment such as storage tanks, pipes, valves, and pump bodies. This minimizes thermal resistance caused by air gaps and ensures efficient heat transfer. Secured with spring clips or hook-and-loop fasteners, installation is convenient, removal is flexible, and the original equipment structure remains unchanged, enabling repeated use.
· Uniform and Efficient Heating: Featuring an etched alloy foil heating circuit design, it achieves heating uniformity of over 98%, with rapid thermal response and no risk of localized overheating. By adhering closely to the heated surface, it enables direct heat transfer, significantly reducing heat loss and achieving thermal efficiency of over 85%.
· Viscosity Control and Anti-Freeze: By heating and tracing equipment such as oil drums, storage tanks, and pipelines, it effectively reduces the viscosity of high-viscosity media such as oils, paraffin, asphalt, and chemical resins, preventing low-temperature solidification and winter waxing, and ensuring smooth material conveyance and pumping.
· Chemical Corrosion Resistance and Harsh Environment Tolerance: Silicone rubber offers excellent resistance to chemical corrosion, weathering, aging, and high temperatures and humidity, ensuring long-term stable operation in acidic or alkaline environments and harsh outdoor conditions.
· Explosion-proof safety design: Special models with explosion-proof certification are available, ensuring safe and reliable use in high-risk industrial settings such as the petroleum, natural gas, and chemical industries.
· Precise temperature control: Temperature sensors such as thermocouples or RTDs can be built-in, working in conjunction with a PID temperature controller to achieve closed-loop precise temperature control with an accuracy of ±1°C.
· Easy Installation and Energy Efficiency: The heater can be directly wrapped around the area to be heated, ensuring simple and quick installation with rapid heat transfer. Compared to traditional steam tracing methods, it offers higher thermal efficiency, completely eliminates the risk of steam leaks, and significantly reduces operating and maintenance costs.
These features make silicone rubber heaters the ideal choice for addressing the three core requirements of the petrochemical industry: viscosity control, freeze protection and thermal insulation, and process heating.
Silicone rubber heaters are thin, flexible electric heating elements manufactured by embedding nickel-chromium alloy heating wires or etched metal foils into a composite insulating layer of silicone rubber and fiberglass cloth. The standard thickness typically ranges from 1.5 mm to 2.0 mm. Their operating temperature range is -60°C to 250°C, and the power density can be customized according to application requirements. Silicone rubber offers excellent water resistance, moisture resistance, chemical corrosion resistance, and weather resistance and aging resistance.
The petrochemical industry involves the heating of large volumes of high-viscosity materials, freeze protection and thermal insulation for piping equipment, as well as explosion-proof heating requirements in hazardous environments. This places strict, even demanding, requirements on the flexibility, temperature uniformity, chemical resistance, and safety ratings of heating elements.
Key advantages include:
· Flexible Conformity: Silicone rubber offers high flexibility, allowing for tight installation that conforms to the curved and uneven surfaces of equipment such as storage tanks, pipes, valves, and pump bodies. This minimizes thermal resistance caused by air gaps and ensures efficient heat transfer. Secured with spring clips or hook-and-loop fasteners, installation is convenient, removal is flexible, and the original equipment structure remains unchanged, enabling repeated use.
· Uniform and Efficient Heating: Featuring an etched alloy foil heating circuit design, it achieves heating uniformity of over 98%, with rapid thermal response and no risk of localized overheating. By adhering closely to the heated surface, it enables direct heat transfer, significantly reducing heat loss and achieving thermal efficiency of over 85%.
· Viscosity Control and Anti-Freeze: By heating and tracing equipment such as oil drums, storage tanks, and pipelines, it effectively reduces the viscosity of high-viscosity media such as oils, paraffin, asphalt, and chemical resins, preventing low-temperature solidification and winter waxing, and ensuring smooth material conveyance and pumping.
· Chemical Corrosion Resistance and Harsh Environment Tolerance: Silicone rubber offers excellent resistance to chemical corrosion, weathering, aging, and high temperatures and humidity, ensuring long-term stable operation in acidic or alkaline environments and harsh outdoor conditions.
· Explosion-proof safety design: Special models with explosion-proof certification are available, ensuring safe and reliable use in high-risk industrial settings such as the petroleum, natural gas, and chemical industries.
· Precise temperature control: Temperature sensors such as thermocouples or RTDs can be built-in, working in conjunction with a PID temperature controller to achieve closed-loop precise temperature control with an accuracy of ±1°C.
· Easy Installation and Energy Efficiency: The heater can be directly wrapped around the area to be heated, ensuring simple and quick installation with rapid heat transfer. Compared to traditional steam tracing methods, it offers higher thermal efficiency, completely eliminates the risk of steam leaks, and significantly reduces operating and maintenance costs.
These features make silicone rubber heaters the ideal choice for addressing the three core requirements of the petrochemical industry: viscosity control, freeze protection and thermal insulation, and process heating.
Case Study 1: Rapid Heating of Chemical Storage Tanks—Replacing Traditional Steam Heating
Problem: In the transportation of traditional petrochemical products, the heating of oil or chemical resins inside storage tanks typically involves installing bundle-tube or coil-type heaters within the tanks, which rely on saturated steam as the heat transfer medium. This method has a long heating cycle (usually taking one to two days to complete the heating process), low thermal energy utilization, and results in a significant amount of steam being wasted, leading to enormous energy consumption. Against the current backdrop of energy conservation and consumption reduction, how to improve efficiency and lower operating costs through process innovation has become a critical challenge for enterprises.
Solution: Guangdong Qian Brothers has successfully designed and developed a chemical tank heating belt using silicone rubber composite materials. This product features a unique tank-wrapping structure. Leveraging the flexible conforming properties of the silicone rubber heating belt, it is directly wrapped around the outer wall of the tank. Combined with an automated constant-temperature control system, it achieves rapid localized heating.
Results:
· Rapid heating: The temperature rise process, which previously took one to two days, is now completed within a few hours, reducing production time by more than 20 times.
· High energy utilization and significant energy savings: It completely eliminates the substantial reactive power losses associated with steam heating.
· No localized overheating, carbonization, or scaling occurs in the oil, fully ensuring oil quality and safety.
· The heating strips are easy to install and maintain and do not compromise tank safety. They have received high recognition from industry professionals and are being widely adopted across the sector.
Technical Highlights: The chemical tank heating strips offer high thermal efficiency, corrosion resistance, high-temperature resistance, anti-scaling properties, outstanding energy savings, and automated control, providing a revolutionary solution for the chemical tank heating industry.
Problem: In the transportation of traditional petrochemical products, the heating of oil or chemical resins inside storage tanks typically involves installing bundle-tube or coil-type heaters within the tanks, which rely on saturated steam as the heat transfer medium. This method has a long heating cycle (usually taking one to two days to complete the heating process), low thermal energy utilization, and results in a significant amount of steam being wasted, leading to enormous energy consumption. Against the current backdrop of energy conservation and consumption reduction, how to improve efficiency and lower operating costs through process innovation has become a critical challenge for enterprises.
Solution: Guangdong Qian Brothers has successfully designed and developed a chemical tank heating belt using silicone rubber composite materials. This product features a unique tank-wrapping structure. Leveraging the flexible conforming properties of the silicone rubber heating belt, it is directly wrapped around the outer wall of the tank. Combined with an automated constant-temperature control system, it achieves rapid localized heating.
Results:
· Rapid heating: The temperature rise process, which previously took one to two days, is now completed within a few hours, reducing production time by more than 20 times.
· High energy utilization and significant energy savings: It completely eliminates the substantial reactive power losses associated with steam heating.
· No localized overheating, carbonization, or scaling occurs in the oil, fully ensuring oil quality and safety.
· The heating strips are easy to install and maintain and do not compromise tank safety. They have received high recognition from industry professionals and are being widely adopted across the sector.
Technical Highlights: The chemical tank heating strips offer high thermal efficiency, corrosion resistance, high-temperature resistance, anti-scaling properties, outstanding energy savings, and automated control, providing a revolutionary solution for the chemical tank heating industry.
Case Study 2: Quick-Thawing Device for Oilfield Screw Pump Drive Heads
Problem: Winters in northern regions are harsh, and screw pump drive heads frequently freeze due to oil emulsification. The traditional method involves using a high-temperature vehicle to thaw the drive head. While high-temperature steam can melt the frozen oil, the water quickly freezes into ice slabs upon hitting the ground, creating serious safety hazards. Furthermore, each thawing operation costs approximately 600 yuan, making it a costly solution.
Solution: After extensive testing and analysis, and inspired by the use of electric hair dryers in vehicles for defrosting, we developed a rapid defrosting device that utilizes silicone rubber heating elements and automatically regulates the defrosting temperature via a thermostat. This device allows for flexible adjustment of the heating temperature within a range of 0–90°C. It heats up quickly and offers high thermal efficiency, enabling rapid defrosting of frozen screw pump drive heads.
Problem: Winters in northern regions are harsh, and screw pump drive heads frequently freeze due to oil emulsification. The traditional method involves using a high-temperature vehicle to thaw the drive head. While high-temperature steam can melt the frozen oil, the water quickly freezes into ice slabs upon hitting the ground, creating serious safety hazards. Furthermore, each thawing operation costs approximately 600 yuan, making it a costly solution.
Solution: After extensive testing and analysis, and inspired by the use of electric hair dryers in vehicles for defrosting, we developed a rapid defrosting device that utilizes silicone rubber heating elements and automatically regulates the defrosting temperature via a thermostat. This device allows for flexible adjustment of the heating temperature within a range of 0–90°C. It heats up quickly and offers high thermal efficiency, enabling rapid defrosting of frozen screw pump drive heads.
Case Study 3: Viscosity Control and Anti-Freeze Heating for Industrial Drums and Storage Tanks
Problem: In the petrochemical industry, 200-liter standard drums and various small-to-medium-sized storage tanks are widely used to store high-viscosity materials such as oils, asphalt, paraffin, paint, resins, and adhesives. At room temperature or in cold environments, the viscosity of these materials increases dramatically or they may even solidify, making it difficult to pour, pump, apply, or mix them. The problem of paraffin solidification is particularly pronounced in winter. Traditional steam heating methods pose risks of frozen pipes and leaks, and involve high maintenance costs.
Solution: Use silicone rubber drum heating bands (also known as drum heaters) to directly heat the drum body. The heating belt incorporates nichrome alloy heating wires or etched nichrome foil heating elements. Equipped with metal clips and springs on both sides, the spring tension ensures the silicone rubber heating plate adheres tightly to the drum wall, achieving rapid and uniform heating. Paired with a digital temperature controller, the system uses surface sensors to monitor material temperature in real time, and a PID algorithm automatically adjusts the output power.
Problem: In the petrochemical industry, 200-liter standard drums and various small-to-medium-sized storage tanks are widely used to store high-viscosity materials such as oils, asphalt, paraffin, paint, resins, and adhesives. At room temperature or in cold environments, the viscosity of these materials increases dramatically or they may even solidify, making it difficult to pour, pump, apply, or mix them. The problem of paraffin solidification is particularly pronounced in winter. Traditional steam heating methods pose risks of frozen pipes and leaks, and involve high maintenance costs.
Solution: Use silicone rubber drum heating bands (also known as drum heaters) to directly heat the drum body. The heating belt incorporates nichrome alloy heating wires or etched nichrome foil heating elements. Equipped with metal clips and springs on both sides, the spring tension ensures the silicone rubber heating plate adheres tightly to the drum wall, achieving rapid and uniform heating. Paired with a digital temperature controller, the system uses surface sensors to monitor material temperature in real time, and a PID algorithm automatically adjusts the output power.
Case Study 4: Heat Tracing for Large Biofuel Tanks and Piping
Problem: A biodiesel operator encountered serious issues during the winter—vegetable oil and animal fats in two 20,000-gallon biofuel storage tanks gelatinized due to low temperatures, preventing normal flow through the outlet pipelines and severely impacting operations. Given the massive size of the tanks, traditional heat tracing solutions were complex to install and energy-intensive. Additionally, critical points such as outlet pipelines, pumps, and valves required comprehensive heat tracing to completely resolve the material solidification issue.
Solution: Large-area silicone rubber plate heaters were applied to the outer walls of the two 20,000-gallon storage tanks. The heaters covered the tank bodies in the form of large silicone rubber sheets, secured and compressed with silicone adhesive to ensure a tight fit. The entire length of the discharge piping from the tanks to the loading platform, as well as the feed piping, was wrapped with heating tape, and the pump bodies and valves were also wrapped with the same heating tape for heating. The entire system is equipped with built-in thermostats set to activate at 40°F (approximately 4.4°C) and deactivate at 60°F (approximately 15.6°C), enabling fully automated temperature control.
Problem: A biodiesel operator encountered serious issues during the winter—vegetable oil and animal fats in two 20,000-gallon biofuel storage tanks gelatinized due to low temperatures, preventing normal flow through the outlet pipelines and severely impacting operations. Given the massive size of the tanks, traditional heat tracing solutions were complex to install and energy-intensive. Additionally, critical points such as outlet pipelines, pumps, and valves required comprehensive heat tracing to completely resolve the material solidification issue.
Solution: Large-area silicone rubber plate heaters were applied to the outer walls of the two 20,000-gallon storage tanks. The heaters covered the tank bodies in the form of large silicone rubber sheets, secured and compressed with silicone adhesive to ensure a tight fit. The entire length of the discharge piping from the tanks to the loading platform, as well as the feed piping, was wrapped with heating tape, and the pump bodies and valves were also wrapped with the same heating tape for heating. The entire system is equipped with built-in thermostats set to activate at 40°F (approximately 4.4°C) and deactivate at 60°F (approximately 15.6°C), enabling fully automated temperature control.
