Why do carbon steel reaction vessels heat up faster than stainless steel reaction vessels?

Carbon steel has higher thermal conductivity than stainless steel

Thermal conductivity varies, as does the rate of heat transfer

Raise the temperature of the jacket; this has nothing to do with stainless steel or carbon steel – it’s likely due to other reasons.

It’s mainly the thermal conductivity; the heat transfer rate is different

Even if the heat transfer coefficients are different, the difference isn’t that significant, right?

Logically, stainless steel should have better thermal conductivity than carbon steel.

It is determined by the physical properties of the material itself

Application scope of stainless steel reaction kettles: Stainless steel reaction kettles are widely used in chemical, food, coating, hot melt adhesive, silicone, paint, pharmaceutical, and petrochemical industries for reactions, evaporation, synthesis, polymerization, saponification, sulfonation, chlorination, nitration, and other processes. Working principle of stainless steel reactor: A heat transfer oil is placed inside the jacket of the electrically heated stainless steel reactor, which is heated by electric heating elements. The jacket is equipped with ports for oil inlet and outlet, overflow measurement, venting, as well as ports for the electric heating elements and temperature sensing. A stainless steel reactor heated by steam uses steam to provide heating directly within the jacket; such reactors require a stable supply of steam heat, and usually a boiler is installed for this purpose. Introduction to stainless steel reaction kettles: Stainless steel reaction kettles are also known as stainless steel reaction tanks. It consists of a kettle body, a kettle cover, an agitator, heating and cooling jackets, support and transmission devices, shaft sealing devices, an oil overflow tank, etc., and is equipped with electric heating elements as well as temperature and pressure gauges. Due to the variations in production processes and operating conditions among users, the agitators used in stainless steel reactors generally include anchor type, paddle type, turbine type, propeller type, or frame type. A welding support is installed on the outer wall of the jacket; this support can be of either hanging or supporting type. There is a discharge port at the bottom of the pot body. A heat transfer oil is placed inside the jacket of the electrically heated stainless steel reactor, which is heated by electric heating rods. The jacket is equipped with ports for oil inlet and outlet, overflow measurement, venting, as well as ports for the electric heating rods and temperature sensing. A stainless steel reactor heated by steam uses steam to provide heating directly within the jacket; such reactors require a stable supply of steam heat, and usually a boiler is installed for this purpose. Features of stainless steel reaction vessels: 1. The stainless steel material possesses excellent mechanical properties, allowing it to withstand high operating pressures as well as the impact resulting from the addition of solid materials in bulk. 2. It has good heat resistance, with a wide operating temperature range (-196~600°C). It does not oxidize or peel at higher temperatures, so it can be heated directly over a flame. 3. It has excellent corrosion resistance and does not rust. 4. It has a better heat transfer efficiency than enamel reaction kettles, with faster heating and cooling speeds. 5. It has good processability, allowing reaction vessels of various shapes and structures to be manufactured according to process requirements. The tank walls can be ground and polished to prevent residue from sticking, making cleaning easier. In a comprehensive comparison: Electrically heated stainless steel reactors have higher energy consumption due to the high power of their electric heating elements, and their heating speed is also slower than that of steam-heated reactors ； However, steam-heated stainless steel reactors require a coal-fired boiler, resulting in slightly higher initial investment compared to electrically heated reactors.