Hot Oil-Thermal Fluid Boilers

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Product Introduction

Description

Hot Oil-Thermal Fluid Boilers are high-efficiency thermal energy conversion devices specifically designed for industrial process heating. They utilize thermal oil as the heat transfer medium, providing a stable high-temperature heat source of 150°C to 350°C in a closed-loop system. Unlike steam boilers, furnace oil-fired steam boilers do not generate high-pressure steam; instead, they achieve indirect heating through precise temperature control. They are widely used in temperature-sensitive processes such as chemical, pharmaceutical, plastics, and food processing. As a core piece of equipment for modern industrial thermal energy management, they offer advantages in safety, energy saving, and precise temperature control, helping companies improve production efficiency and energy utilization.

Working Principle

The core of Hot Oil-Thermal Fluid Boilers is a thermal oil circulation system: fuel is fully combusted in the combustion chamber, and heat is transferred to the thermal oil through the furnace tubes; the high-temperature thermal oil is then transported to the heat-using equipment by a circulation pump, releasing its heat energy before returning to the boiler for reheating. The entire process operates at atmospheric or low pressure, avoiding the high-pressure risks associated with steam boilers. An intelligent PLC control system monitors oil temperature, flow rate, and pressure in real time, achieving precise temperature control within ±1°C. It also integrates automatic overheat protection, oil level protection, and leak detection functions to ensure safe and stable operation throughout the entire cycle.

Product parameters

Model		WNS 2-1.0-Y,Q	WNS 4-1.25-Y,Q	WNS 6-1.25-Y,Q	WNS 8-1.25-Y,Q	WNS 10-1.25-Y,Q	WNS 15-1.25-Y,Q	WNS 20-1.25-Y,Q
Rated evaporation capacity (t/h)		2	4	6	8	10	15	20
Rated wording pressure(MPa)		1.0	1.25	1.25	1.25	1.25	1.25	1.25
Rated steam temperature (°C)		184	193	193	193	193	193	193
Water-supply temperature (°C)		20	20	104	104	104	104	104
Boiler volume (m³)		7.2	8.2	14.5	16.2	19.8	26.1	30.5
Design efficiency (%)		92	92	92	92	92	93	93
Applicable fuel		Light oil,heavy oil,natural gas,Liquefied gas and urban coal gas
External size	Length(mm)	5084	6022	7151	7600	8360	9050	9650
	Width(mm)	2450	2700	2800	3000	3000	3200	3430
	Height(mm)	2380	2684	2882	3200	3200	3560	3570
Boiler weight (t)		8	12.6	17.2	18.6	23.5	34.2	40.1
Diameter of main steam opening (mm)		65	100	125	150	150	200	200
Diameter of safety valve (mm)		40×2	50×21	65×2	65×2	80×2	100×2	100×2
Chimney diameter (mm)		350	450	600	700	750	900	1000

Core Advantages

Hot Oil-Thermal Fluid Boilers have become the preferred choice for many industries due to their irreplaceable technological and economic advantages:

1.High Efficiency and Energy Saving, Reducing Operating Costs

Low Pressure and High Temperature: This is the most significant advantage of the diesel-fired steam boiler. The system can achieve temperatures above 300°C under near-atmospheric pressure conditions, without the high pressure required by steam boilers, greatly reducing equipment investment and safety risks.
Liquid Phase Circulation: The system features a closed-loop liquid phase circulation system, eliminating the hydrophobic heat loss of steam boilers and waste heat emissions, resulting in extremely high thermal efficiency.
Precise Temperature Control: Employing a PID or PLC control system, it can precisely control the outlet oil temperature and flow rate, with a temperature difference accurate to ±1°C, meeting high-precision process requirements.

2.Safe and Reliable, Stable Operation

Multi-level Safety Interlocks: Equipped with comprehensive operation control and safety detection devices, such as expansion tank level control, outlet high-temperature protection, interlocking of the circulating pump and burner, flame monitoring, and pressure protection.
Explosion-proof design: Electric heating thermal oil heaters can adopt an explosion-proof structure design, with an explosion-proof rating of up to Class C, suitable for hazardous areas such as chemical plants.
No corrosion or scaling: The thermal oil itself does not corrode pipes, and there are no water treatment issues in the system, eliminating the scaling risks common in steam boilers, resulting in a long equipment service life.

3.Easy investment and maintenance

Simple system: Compared to steam boilers, there is no need for complex auxiliary equipment such as water treatment equipment and steam traps, resulting in a lower total system investment.
Rapid start-up: Some designs can achieve full load output in a short time (e.g., 5 minutes), improving production efficiency.

Typical Application Scenarios

Chemical Industry: Constant temperature heating of reaction vessels, polymer melting processes , with temperature fluctuations ≤ ±1°C.
Pharmaceutical Industry: Aseptic sterilization equipment, drug drying systems, meeting GMP standards.
Plastics and Rubber: Injection molding machine mold heating, vulcanizing tank heat source, improving product consistency.
Food Processing: Heat transfer medium for baking equipment, oil refining processes, avoiding charring contamination.

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