In the field of industrial thermal energy, the stability of the thermal oil boiler circulation system directly affects production efficiency and equipment safety. The performance of its core components is a crucial factor in determining whether the system can operate efficiently in the long term. This article will focus on the core components of the circulation system and analyze their technical characteristics and application key points.
I. Circulation Oil Pump: The Heart of System Power As the power source for the forced circulation of thermal oil, the circulation oil pump needs to operate continuously and stably in high-temperature and high-pressure environments. Take the BRY series high-temperature oil pump as an example. Its pump body and impeller are made of heat-resistant alloy steel, which can withstand a high temperature of 350°C. It is equipped with a two-way torque combined bearing and a double-seal structure (front-placed high-temperature carbon fiber + rear-placed mechanical seal), effectively improving the equipment’s sealing performance and service life. Through the optimization of the impeller design, the fluid transportation efficiency of this series of oil pumps is increased by 15%. It is widely used in industries such as petrochemical, textile, and food processing, and can meet diverse requirements with a flow rate of 1.5 – 30m³/h and a head of 22 – 87m. It should be noted that high-temperature oil pumps are products subject to the national production license management. When purchasing, it is necessary to verify the production qualifications to avoid potential safety hazards.
II. Expansion Tank and Oil Storage Tank: The Core of Pressure Balance The expansion tank, installed at a high position, compensates for the volume change of thermal oil due to heating. At the same time, it helps to remove gases and moisture from the oil, preventing air blockage. The oil storage tank serves as an emergency reserve device, which can quickly supply cold oil in case of system failures, avoiding dry-burning of the equipment. The cooperation between the two should follow the design principle of “the expansion tank is higher than the highest point of the system, and the oil storage tank maintains a low liquid level” to ensure the pressure balance of the system and the safe circulation of the medium.
III. Oil Filter and Oil-Gas Separator: Guardians of System Purity The Y-type oil filter undertakes the important task of filtering impurities and needs to be cleaned regularly to prevent pipeline blockage. The oil-gas separator uses physical separation technology to remove air and water vapor from the thermal oil, ensuring the stable operation of the medium in a liquid phase. In practical applications, it is recommended to check the oil filter and separation device every quarter to ensure that the system purity meets the standards.
IV. Valves and Intelligent Control System: The Central Nervous System for Precise Regulation The electric control valve is linked with the PID temperature controller to achieve precise temperature control within ±1°C, significantly improving process stability. For example, in a rubber vulcanizer, the secondary circulation system can provide different temperatures for different workstations with a single heat source by switching the valve path, achieving an energy – saving effect of 20%. At the same time, the pressure sensor monitors the inlet – outlet pressure difference in real – time (usually maintained at 0.2 – 0.3MPa), and together with the over – temperature alarm function, it ensures safe operation.
V. Maintenance and Selection Recommendations System maintenance should follow the principle of “regular inspection and preventive maintenance”: clean the oil filter and heat exchanger every quarter, and check the condition of the seals; conduct a comprehensive inspection of the heating pipes, valves, and control system every year. When selecting components, pay attention to the product’s high – temperature resistance (for example, valves need to withstand temperatures above 300°C), sealing reliability, and compatibility. Give priority to brands that have passed ISO certification. For circulation oil pumps, it is recommended to configure one for standby to ensure the continuous operation of the system in case of sudden failures.
