Analysis of the scope and advantages of the use of gas electric heaters

Gas electric heater is a heat exchanger which is converted into heat energy. It has the advantages of convenient energy supply, compact structure, automatic temperature control, easy installation and maintenance, and no pollution. The electric heater is composed of tubular container and electric heating element, which is composed of temperature control cabinet (table). The control part is composed of advanced digital circuit, integrated circuit trigger, high back pressure thyristor and so on, which is composed of adjustable temperature measurement and constant temperature system, which ensures the normal operation of the electric heater. The heating element adopts straight type to replace the U shaped structure, the special wrench can be conveniently assembled and disassembled. The temperature control is controlled by thyristor. The PID digital display can set the required temperature arbitrarily in the temperature range, and keep the constant temperature automatically. The temperature is controlled by 5 degrees. It also has more limited acousto-optic alarm and multiple protection functions, which can be controlled in place or far away. Special requirements can also be replaced by design and manufacture.

Gas electric heaters are mainly used to heat the required air flow from the initial temperature to the required air temperature, up to 850 degrees centigrade. It has been widely used in many research and production laboratories, such as aeronautics and Astronautics, weapons industry, chemical industry and colleges and universities. It is especially suitable for automatic temperature control and high flow high temperature combined system and accessories test. The gas electric heater has a wide range of use: it can heat any gas and generate hot air without water, no chemical corrosion, no pollution, no electric conduction, no combustion, no explosion, safe and reliable, and the heating space is heated up quickly (controllable).

The air heater is designed for coal-fired power plants in addition to the new heating equipment using grey system, suitable for power plant airslide gasification wind heating, electric precipitator hopper gasification ash storage gasification wind and wind heating etc.. The equipment is composed of two parts of the body of the gas electric heater and the control system. The heating element adopts 1Cr18Ni9Ti stainless steel tube protection sleeve, 0Cr27Al7MO2 high resistance alloy wire, crystal magnesia powder by compression molding. The heat pipe has good thermal conductivity and excellent insulation. There is a flow guide plate inside the heater, and the heating is uniform. The gas electric heater control cabinet and the gasification fan have interlocking control function and local control and remote transmission control interface. When the equipment is suddenly stopped, the control cabinet can be automatically adjusted smoothly.

The air heater system details the control points

Air heater for resistive heating, the appearance form of flange type electric heater.

The air heater is composed of two heaters (240kW and 160kW) on the horizontal series installation, installation form of the supporting leg is installed, 240kW electric heater is divided into 3 groups, each group of power 80kW, 160kW electric heater is divided into 3 groups, each group of power 53.3kW, the "delta" connection.

By power supply to the electric heater to heat it, heat the flow medium in the container, and make the medium reach the set temperature value at the outlet.

The air heater is composed of temperature control meter ST1 temperature control, temperature signal acquisition ST1 export, by PID control, adjustable power output signal 4-20mA SCR trigger module, so as to control the output power of the heater can realize stepless adjustable output power of 0-400kW.

The internal temperature alarm detection instrument ST2 heater 6 temperature, when the flow rate is too low or no flow and other reasons, the heater in the dry, at a temperature more than any internal instrument within the temperature setting value control circuit and alarm lock, with alarm lamp. After that, it must be reset by manual, and the heater can be restarted.

The system has a pressure alarm chain system. The operation of the control cabinet is interlinked with the user's system pressure. The chain signal is provided by DCS. Only when the medium pressure is normal, the heater is allowed to start.

When the heater is running again, when the SCR occurs due to the over temperature of the thyristor, the overcurrent or the lack of equal faults, the heater will be cut off and the alarm signal will go to DCS.

The system has multiple chains, which can be used for chain use with other devices.