introduce
Steel sealed containers used for storing liquids or gases are called steel storage tanks. Steel storage tank engineering is an essential and important infrastructure in industries such as petroleum, chemical, grain and oil, food, fire protection, transportation, metallurgy, and national defense. Our economic life always relies on steel storage tanks of all sizes, and the important role played by steel storage tanks in the development of the national economy is irreplaceable. With the continuous development of the storage tank industry, more and more industries and enterprises are using storage tanks, and more and more enterprises are entering the storage tank industry. Steel storage tanks are specialized equipment for storing various liquid (or gas) raw materials and finished products. For many enterprises, normal production cannot be achieved without storage tanks, especially for national strategic material reserves, which cannot do without storage tanks of various capacities and types. Our country's oil storage facilities are mainly composed of above ground storage tanks, and are mostly made of metal structures

purpose
A storage tank is a storage container for the medium transported by long-distance oil and gas pipelines. The oil storage tanks at the first station of the oil pipeline are used to collect and store oil and ensure the stability of pipeline oil transportation. The oil storage tanks at the last station are used to receive and store incoming oil and provide it to the oil using units. The gas storage tanks at the terminal gate stations of gas pipelines are mainly used for peak shaving of urban gas and are gradually being replaced by underground gas storage and pipeline gas storage.

Heating technology
The traditional heating method for storage tanks is as follows: a tubular or coil type heater is installed inside the tank, which allows the viscous liquid inside the tank to be heated by exchanging with a thermal medium (usually saturated steam), reducing the viscosity of the liquid, improving its fluidity, and facilitating pump delivery.

The traditional heating method for storage tanks has been used for many years, and its drawbacks have become increasingly apparent
1. Low heat exchange efficiency and high steam consumption. The traditional in tank heater heats viscous liquids through a static natural convection heat transfer, with an extremely low heat release coefficient. Due to low heat transfer efficiency and high condensate temperature, it is often discharged with a large amount of steam. At the same time, due to the high temperature of the viscous liquid on the surface of the heating tube, it stays on the high-temperature surface of the heat exchange tube for a long time, which easily produces decomposition products, aggregates on the surface of the heat exchange tube, and is prone to coking, seriously hindering heat transfer and affecting heat transfer efficiency.
2. The heating process is not economical. When only a small amount of viscous liquid needs to be poured out, it is also necessary to heat the entire viscous liquid in the tank, and the amount of heating is several times the amount used at that time, making a large amount of steam useless.
3. The temperature of viscous liquids in various parts of the tank is uneven. The viscous liquid near the heater has a higher temperature, while the viscous liquid far away from the heater has a lower temperature. The temperature at which the viscous liquid is extracted is even lower, which seriously affects the fluidity of the oil output.
4. Affects the quality of viscous liquids. Repeatedly heating the viscous liquid inside the tank generates a large amount of small decomposition products during the heating process, which has a certain impact on the quality of the viscous liquid and increases the cost of post-processing.
Given the drawbacks of traditional tank heating methods, a new type of local rapid heating technology has emerged.

Heating characteristics:
1. Fast heating speed, high heat transfer efficiency, and less prone to scaling.
2. Can heat viscous liquids quantitatively, heating as much as needed.
3. Viscous liquids will not experience local high temperatures or carbonization, ensuring the quality of viscous liquids and the heat transfer efficiency of heaters.
4. The temperature at the oil outlet inside the storage tank is the highest, ensuring the fluidity of the poured viscous liquid.
5. Avoiding repeated heating of viscous liquids inside the tank, ensuring the color of viscous liquids, and reducing the cost of viscous liquid treatment.
6. Long service life, corrosion resistance, high temperature resistance, high pressure resistance, and anti scaling function greatly improve the overall performance of the heat exchanger.
7. The advanced design of the process structure ensures the smooth flow of viscous liquids and a good 'bottom suction' effect.
8. Automated control can be achieved, and the steam feed rate can be controlled based on the inlet and outlet temperatures of viscous liquids and the oil flow rate.
9. Compact structure, easy installation and maintenance, will not affect the safety of the tank due to the installation of the heater. Compared with U-tube heat exchangers, under the same heat transfer area, the external dimensions of vortex heat film heat exchangers are only about half of those of U-tube heat exchangers.
10. Compared to electric heating methods, it is safer, heats more gently, and has less impact on the quality of viscous liquids.

Comparison between local rapid heating and traditional tubular heating in lubricating oil storage tank heating: