News Details

Principle of Constant Temperature Explosion-Proof Tubular Electric Heater    

Fluid explosion-proof electric heater is a device that consumes electrical energy and converts it into heat energy to heat the material to be heated. During operation, the low-temperature fluid medium enters the input port through the pipeline under pressure, flows along the specific heat exchange channel inside the electric heating container, and follows the path designed based on the principles of fluid thermodynamics, taking away the high-temperature thermal energy generated by the electric heating elements during operation, thereby increasing the temperature of the heated medium. The outlet of the electric heater obtains the high-temperature medium required by the process. The internal control system of the electric heater automatically adjusts the output power of the electric heater based on the temperature sensor signal at the outlet, ensuring uniform temperature of the medium at the outlet. When the heating element overheats, the independent overheat protection device of the heating element immediately cuts off the heating power supply, preventing the heated material from overheating, coking, deteriorating, or carbonizing, and in severe cases, preventing the heating element from burning out, effectively extending the service life of the electric heater.

Application Scope

Typical application scenarios of fluid explosion-proof electric heaters mainly include:
1. Heating and temperature raising of chemical materials in the chemical industry, drying of some powders under certain pressure, chemical processes, and spray drying.
2. Heating of hydrocarbons, including crude oil, heavy oil, fuel oil, heat transfer oil, lubricating oil, paraffin, etc.
3. Heating of process water, superheated steam, molten salt, nitrogen (air), water gas, and other fluids that need to be heated.
4. Zone 1 and Zone 2 hazardous gas areas;
5. Explosive gas or vapor environments of Groups IIA, IIB, T1 to T4;
6. Due to the use of advanced explosion-proof structures, the equipment can be widely used in chemical, military, petroleum, natural gas, offshore platforms, ships, mining areas, and other places requiring explosion protection.

Main Uses in the Mechanical Electric Heating Industry

Explosion-proof electric heater is a high-efficiency, energy-saving, environmentally friendly, and safe explosion-proof industrial electric heating furnace developed based on the advanced electric heater technology abroad. This electric heating furnace is a working method that uses electrical energy as the power source to convert its internal high-voltage temperature system into thermal energy.
Generally speaking, the explosion-proof electric heating furnace uses heat transfer oil as the heat carrier. The internal high-voltage temperature system, through the circulation pump of the heat transfer oil and forced processing by electrical energy, transfers the heat of the internal high-voltage temperature to one or more electric heating equipment. After passing through the transition function in the high-voltage temperature system of the electric heating equipment, the heat transfer oil starts a new heating work efficiency, that is, it returns to the electric heating furnace through the circulation pump again to absorb heat a second time and transmit it to the internal high-voltage temperature system of the electric heating furnace. Through this cyclic work, the electric heating furnace continuously transfers heat, enabling the internal high-voltage temperature system of the electric heating furnace to obtain a continuous high-temperature energy source, thereby meeting the heating requirements of the heated medium during the high-temperature process.
The characteristics of explosion-proof electric heaters in the mechanical electric heating industry are as follows:
1. It can achieve continuous transfer of the internal high-voltage temperature system, ensuring that the internal high-voltage temperature system of the electric heating equipment uses electrical energy to obtain a higher temperature energy source, meeting the high-temperature heating requirements of the medium during operation, and maximizing its effect.
2. This equipment has a precise structure, light volume, light weight, and convenient installation process. It does not produce harmful pollution to the surrounding environment during heating, and can obtain relatively high heating temperature and efficiency under relatively low working pressure.
3. High intelligent standard. Relevant technical personnel of China Electric Heater Network adopt advanced intelligent heating working mode, that is, by setting the original temperature of the high-temperature voltage medium inside the gas electric heater during work, in experiments, this temperature control accuracy can reach a range of ±2℃ to ±0.2℃.
4. The internal high-voltage system of this equipment can provide alarm signals such as operation, high temperature, fault, and shutdown to the DCS system, and can also accept automatic and shutdown operation commands from the DCS. Moreover, reliable and safe monitoring devices are added to the electric heater system, but the price of this electric heater is relatively high.
5. The electrical equipment has multiple related interfaces, which can effectively monitor the heat transfer oil pump, the temperature and flow of the heat transfer oil, and the pressure of the internal high-voltage temperature, thereby achieving the ideal reform of explosion-proof electric heater being more energy-saving, more environmentally friendly, and more efficient.