Working Principle
The fluid explosion-proof electric heater is a device that converts electrical energy into thermal energy to heat the required material. During operation, the low-temperature fluid medium enters the input port under pressure through the pipeline, flows along the specific heat exchange channels inside the electric heating container, following the path designed based on fluid thermodynamics principles, and带走 the high-temperature thermal energy generated by the electric heating elements during operation, thereby raising the temperature of the heated medium. The outlet of the electric heater provides the high-temperature medium required by the process. The internal control system of the electric heater automatically adjusts the output power based on the temperature sensor signal at the outlet to ensure uniform medium temperature at the outlet. When the heating element overheats, the independent overheat protection device immediately cuts off the heating power supply to prevent the heated material from overheating, coking, deteriorating, or carbonizing, which could otherwise damage the heating element. This effectively extends the service life of the electric heater.
Application Scope
Typical applications of fluid explosion-proof electric heaters mainly include:
1. Heating chemical materials in the chemical industry, drying certain powders under specific pressure, chemical processes, and spray drying.
2. Heating hydrocarbons, including crude oil, heavy oil, fuel oil, thermal oil, lubricating oil, paraffin, etc.
3. Heating process water, superheated steam, molten salt, nitrogen (air), water gas, and other fluids that require temperature increase.
4. Due to the explosion-proof structure, the equipment can be widely used in chemical, military, petroleum, natural gas, offshore platforms, ships, mining areas, and other places requiring explosion-proof measures.
Functional Features
1. Small size, high power: The heater mainly uses bundled tubular electric heating elements.
2. Fast thermal response, high temperature control accuracy, and high overall thermal efficiency.
3. High heating temperature: The maximum working temperature of the heater can reach 850°C.
4. Uniform outlet medium temperature and high temperature control accuracy.
5. Wide application range and strong adaptability: The heater can be used in explosion-proof or ordinary environments, with an explosion-proof rating up to dⅡB and C, and a pressure resistance up to 20MPa.
6. Long life and high reliability: The heater is made of special electric heating materials, with low surface power load design and multiple protections, greatly enhancing the safety and service life of the electric heater.
7. Fully automatic control: According to requirements, through the heater circuit design, automatic control of outlet temperature, flow, pressure, and other parameters can be easily achieved, and it can be networked with computers.
8. Significant energy-saving effect: Almost 100% of the electrical energy is converted into heat and transferred to the heating medium.
Converting electrical energy into thermal energy to heat objects is a form of electrical energy utilization. Compared with general fuel heating, electric heating can achieve higher temperatures (e.g., arc heating can reach temperatures above 3000°C), and it is easy to achieve automatic temperature control and remote control (e.g., vehicle-mounted electric heating cups). It can maintain a certain temperature distribution of the heated object as needed. Electric heating can generate heat directly inside the heated object, resulting in high thermal efficiency and fast heating speed. Depending on the heating process requirements, it can achieve uniform overall heating or local heating (including surface heating), and it is easy to achieve vacuum heating and controlled atmosphere heating. During the electric heating process, less waste gas, residue, and smoke are produced, keeping the heated object clean and not polluting the environment. Therefore, electric heating is widely used in production, scientific research, and experiments. Especially in the manufacturing of single crystals and transistors, mechanical parts and surface quenching, smelting of ferroalloys, and manufacturing of artificial graphite, electric heating methods are adopted.
According to different electrical energy conversion methods, electric heating is usually divided into resistance heating, induction heating, arc heating, electron beam heating, infrared heating, and dielectric heating.
1. This SRY6-3/380V/4KW type sheath electric heater consists of a heating core and a sheath tube. The heating core uses tubular electric heating elements as the heat source, and the sheath tube is made of thin stainless steel, which has a large heat dissipation area and fast heat transfer. The terminal device part is divided into ordinary type (using iron-made stretched cup-shaped cover) and special type (using bolted explosion-proof device seal). The special type meets the explosion-proof mark dIICT4 and protection level IP65 series standards.
2. The electric heater is connected to the oil tank container body by flange. The sheath isolates the heating core from the heated oil. When repairing the electric heater, it is not necessary to drain the oil from the tank; only the heating core needs to be pulled out and replaced with a new one, making maintenance convenient.
3. During design, the contact area between the sheath and the heated oil should be considered to prevent local carbonization of the oil due to excessive heating temperature. This type of heater is only suitable for thermal oil or oils with good heat transfer effects, used for heating within the medium.
SRY6-3/380V/4KW type sheath electric heater technical parameters:
Rated voltage: Single phase 220V, Three phase 380V
Surface heating power: ≤0.7w/cm² as design standard
Heat transfer temperature: ≤300°C
Working medium: Mineral
Working pressure: ≤0.8MPa
Heater installation size: Ø81mm
Purpose:
SRY6-3/380V/4KW type sheath electric heater is used for heating hydraulic and lubricating oil in hydraulic and lubrication devices, and can also be used for heating non-corrosive gases or liquids.
