Trapezoidal aluminum ingot online heating equipment
1. This set of equipment is used for on-line temperature raising of trapezoidal aluminum ingots. The rated power of the equipment is 350KW, the rated frequency is 200HZ, and the temperature is raised online at 100-120 °C. 2500×1000×1300mm, the total weight is about 2.5T, and the water supply is about 15 t/h.
2. Technical parameters of trapezoidal aluminum ingot on-line lifting equipment
|1. Electrical parameters|
|Transformer secondary voltage||V||380|
|Intermediate frequency power supply rated power||Kw||350|
|Output voltage (furnace mouth)||V||750|
|2. Water system parameters|
|water pressure||Mpa||0.1 – 0.2 _|
|Inlet water temperature||°C||5～35℃|
|Outlet temperature||°C||< 50℃|
3. Electrical technical description of trapezoidal aluminum ingot on-line lifting equipment
The electrical part of the complete set of equipment includes intermediate frequency power control cabinet, temperature closed-loop control system, external control console, reactive power compensation capacitor bank, etc.
The intermediate frequency power supply is a thyristor frequency conversion device, the input voltage is 380V, 50Hz, and the output power
350KW, the power can be adjusted steplessly, and the output frequency is 0.2KHz. The color of the cabinet is determined according to the user’s requirements, and the overall size is 2500×1000×1300mm, as shown in the figure above.
The intermediate frequency control system is fully digital and has no relay control. Unique sweep frequency start mode, with 100% start-up success performance.
4. Principle of temperature closed-loop control system of trapezoidal aluminum ingot online lifting equipment :
, The main control board of the intermediate frequency power supply is designed with a temperature closed-loop control interface, the temperature control instrument adopts the Japanese conductive SR93 with PID adjustment instrument, and the far-infrared optical fiber thermometer adopts the German Opris CT series thermometer, which measures the temperature -40-900 ℃. First, set the heating temperature in the temperature control instrument. After the power is turned on, the thermometer measures the heating temperature in real time and feeds it back to the temperature control instrument. The temperature control instrument compares the measured temperature with the set heating temperature and outputs an analog signal to the IF main control board. , the main control board automatically adjusts the trigger angle of the thyristor according to the level of the signal, so that the output power of the power supply can be adjusted with the level of the analog signal to achieve the purpose of temperature closed-loop control. Because the temperature measurement system adopts imported aluminum special thermometer, the temperature measurement is accurate. Optical fiber signal transmission ensures the stability of anti-collapse control, and online automation is realized. The user-friendly design of the temperature control meter operation interface is easy to adjust and easy to observe. The whole system is highly automatic and responsive, specially designed for measuring aluminum.
Equipment outline 350KW/0.2KHZ
Outline drawing of the newly designed online temperature raising equipment 350KW/0.2KHZ