Oil & Gas Fired Thermal Oil Boiler

Aix Boiler oil & gas fired thermal oil boiler operates based on the principle of liquid phase forced circulation and three-pass combustion heat exchange. Using natural gas, LPG, diesel oil and other fuels, with thermal oil as the heat carrier, the Burner produces high-temperature flame and flue gas to heat the coils inside the furnace through radiation and convection. Driven by the circulating oil pump, it realizes closed-cycle continuous heating supply, and can stably output high-temperature heat energy up to 350℃ under a low pressure of ≤0.8MPa. The whole boiler is designed and manufactured in strict accordance with the standards of China Boiler and Boiler Water Treatment Association and GB/T 17410-2023 Organic Heat Carrier Furnaces as well as TSG 11-2020 Boiler Safety Technology Supervision Regulation. Its thermal efficiency can reach 90%–95%, featuring safe and stable operation, energy conservation, environmental protection and precise temperature control. As the core high-temperature industrial heating equipment of Aix Boiler brand, this product is independently developed, produced and inspected by the original factory with full-chain quality control. Adopting horizontal coil structure, fully automatic control system and low-nitrogen combustion technology, it is specially designed for scenarios requiring stable high-temperature heat sources such as chemical industry, textile printing and dyeing, food processing, woodworking, building materials, asphalt heating and pharmaceutical production. It can fully replace traditional coal-fired thermal oil furnaces, helping enterprises achieve environmental compliance, energy saving and stable continuous production.

1. Core Product Parameters (Aix Oil & Gas Fired Thermal Oil Boiler)

2. Working Principle & Technical Core

Aix oil & gas fired thermal oil boiler adopts a horizontal three-pass coil full wet-back structure, consisting of eight core parts: furnace body, burner, coil heating surface, combustion chamber, economizer, circulating oil pump, fully automatic control system and safety accessories. It belongs to high-efficiency organic heat carrier furnace equipment. During operation, fuel is atomized by the burner and sprayed into the furnace for full combustion to produce high-temperature flue gas. The flue gas completes the first-pass radiation heat exchange along the coils, enters the second-pass convection heat exchange through the combustion chamber, then proceeds to the third-pass enhanced heat exchange, and finally discharges after waste heat recovery through the economizer. The thermal oil is rapidly heated in the coils, driven by the circulating oil pump to the heat-consuming equipment to release heat, and then returns to the boiler for reheating, realizing continuous high-temperature heating supply cycle after cycle. Equipped with PLC / Siemens intelligent control system, the boiler realizes automatic ignition, automatic proportional combustion adjustment, automatic constant temperature, automatic circulating pump control, automatic alarm and shutdown protection. It can intelligently adjust combustion intensity and heating rhythm according to oil temperature and load, realizing truly unattended and stable operation. Meanwhile, the coil enhanced heat exchange structure ensures uniform heating, high heat exchange efficiency and less coking, greatly improving the service life and operational safety of the boiler.

3. Core Features & Original Factory Advantages

Low Pressure & High Temperature, Safe and Efficient
It can provide high-temperature heat energy up to 350℃ under a low pressure of ≤0.8MPa, without the need for high-pressure vessels or complex water treatment systems. The system is simpler and safer to operate, completely eliminating potential safety hazards of high-pressure steam systems, in line with the safety and energy-saving guidelines advocated by China Boiler and Boiler Water Treatment Association.

Ultra-high Thermal Efficiency, Lower Operating Cost
With a combined design of three-pass enhanced heat exchange, threaded coils and economizer, it fully absorbs flue gas heat with thermal efficiency up to 90%–95%, saving 15%–25% energy compared with conventional boilers. Long-term use significantly reduces fuel costs with a short investment payback period.

Low-nitrogen & Environmentally Friendly, Easy EIA Approval
Equipped with low-nitrogen burners and flue gas recirculation technology, NOx emission ≤30mg/Nm³, no black smoke, no dust, low noise, fully meeting the strictest environmental standards in all regions. No desulfurization, denitrification or dust removal equipment is required, making environmental assessment and acceptance worry-free for enterprises.

Fully Automatic Intelligent Operation, Labor-saving
One-key start, automatic ignition, automatic constant temperature, automatic circulation, automatic flameout protection, fault self-diagnosis and alarm. It supports remote monitoring and multi-period timing operation. The circulating pump and combustion system are intelligently linked, requiring no special on-duty personnel and greatly saving labor costs.

Precise Temperature Control, Stable Heating Supply
Adopting PID high-precision temperature control with an accuracy of ±1℃, the temperature is continuously adjustable. It heats up quickly and supplies heat evenly, stably coping with load fluctuations, ensuring constant temperature in production processes and improving product quality and consistency.

Compact Structure, Fast and Convenient Installation
Delivered as a horizontal packaged unit with pre-assembled furnace body, burner, control system and pipelines. Only oil pipes, fuel and power connections are needed on site for commissioning. It features a small footprint and no complex infrastructure, suitable for new projects and old boiler renovation.

Strong Support from Original Factory
Aix Boiler conducts independent R&D and production with Class A manufacturing technology, no middleman price difference, transparent pricing and stable supply. We provide full-range customization including power, temperature, fuel type, low-nitrogen and explosion-proof, along with lifelong technical support and fast after-sales response.

4. Manufacturing Process & Quality Compliance

Aix oil & gas fired thermal oil boiler adheres to standardized lean manufacturing in the original factory, strictly implementing national organic heat carrier furnace standards and special equipment safety specifications. The furnace body is coiled with high-quality boiler-specific seamless steel pipes, featuring high temperature resistance, corrosion resistance and reliable pressure bearing. The heating surface adopts a three-pass coil structure with large heat exchange area, uniform heating, less coking and longer service life. The front and rear smoke boxes feature reliable sealing and quick-opening structure for easy maintenance and ash cleaning. Key components adopt branded burners, circulating oil pumps, instruments and valves, ensuring stable performance, low failure rate and long service life. Each boiler undergoes four strict tests before leaving the factory: hydrostatic test, air tightness test, safety protection test and commissioning test. Only qualified products are delivered with complete certificates including boiler qualification, inspection report and operation manual, ensuring smooth acceptance and filing.

5. Application Scenarios & Industry Solutions

With core advantages of low pressure & high temperature, high efficiency, environmental protection, stability and full automation, Aix oil & gas fired thermal oil boiler is widely used in various high-temperature heating projects:

• Chemical Industry: Reactor heating, distillation, concentration, polymerization, drying

• Textile Printing & Dyeing: Heat setting, baking, steaming, dyeing, drying

• Food Processing: Baking, drying, melting, sterilization, cooking

• Wood & Building Materials: Wood drying, plate hot pressing, gypsum board drying, concrete curing

• Road Construction: Asphalt heating, asphalt tank insulation, road construction heating

• Pharmaceutical Industry: Traditional Chinese medicine extraction, liquid concentration, drying, sterilization

• Plastic & Rubber Industry: Injection molding, extrusion, calendering, vulcanization, hot pressing

• Old Boiler Renovation: Replace coal-fired thermal oil furnaces to achieve environmental compliance and energy upgrading

The boiler can be flexibly configured according to industry processes, heating temperature, power requirements and installation conditions, providing a one-stop high-temperature heating solution. It is an ideal heat source equipment for industrial high-temperature heating and the elimination and renovation of traditional boilers.

6. Operation, Maintenance & After-sales Service

To ensure long-term stable operation of the boiler, users should use qualified thermal oil, regularly check oil quality, clean ash deposits on coils, inspect burners and safety accessories, operate in accordance with the instruction manual, and prohibit over-temperature and overload operation. As the original factory of oil & gas fired thermal oil boilers, Aix Boiler provides free on-site survey and scheme design, professional installation, commissioning and operation training, 12-month warranty and lifelong maintenance service, fast spare parts supply and emergency repair, regular return visits and system optimization upgrades. We take technological innovation as the core and quality & safety as the bottom line, focusing on R&D and manufacturing of high-temperature industrial heating equipment. With the advantages of the original factory, mature technology, stable performance and perfect service, we have become a trusted boiler brand in the industry.

7.Graphic introduction

Choosing Aix oil & gas fired thermal oil boiler means choosing a modern high-temperature heating solution that is safe, efficient, environmentally friendly and precise. New and old customers from all over the world are welcome to contact us for negotiation and on-site inspection, and jointly create a new era of stable and efficient heating supply!