Electric heating boiler mainly consists of the boiler body, electric control box, and control system. Its characteristics are environmental protection, cleanliness, no pollution, no noise, and full automation. With the reduction and significant price increase of limited energy, thermal oil boilers, as emerging boiler equipment, are increasingly recognized by everyone. The electric heating tube is the core component of the electric heating boiler, directly determining the service life of the boiler. Non-metallic electric heating tubes (such as ceramic electric heating tubes) should be chosen as much as possible because they are load-resistant, have a long life, and have a water-electricity separation structure, ensuring the boiler never leaks electricity. The electric heater uses a metal tubular electric heater to heat water, directly converting electrical energy into thermal energy (producing hot water or steam). It does not require combustion to convert chemical energy into thermal energy, thus no need to supply air and fuel for combustion, and no harmful gases or ash are emitted, fully meeting environmental requirements.
Instructions for use
(1) Preparations before startup: First, check the open/close status of valves. Valves that should be opened include: inlet and outlet valves of the main circulation oil pump; inlet and outlet valves of the heat transfer oil for the reactor jacket and built-in coil, and the vent valve. Valves that should be closed include: the drain valve on the main oil return pipeline; the drain valve on the expansion oil tank. Next, check the electrical aspects: whether the power supply to the electric control cabinet is connected; observe whether the temperature measuring instrument displays and record the displayed temperature. Then, check the sealing condition of each connection part, such as the sealing of pump inlet and outlet valves and flanges; the flange sealing of the heating furnace liner; the sealing condition of the circulation oil pump, etc., whether they are intact. Also, check whether the fasteners are loose, such as the anchor bolt connection of the circulation oil pump.
(2) Startup: Only start the machine after all the above preparations are completed. First, press the jog button of the circulation oil pump motor; observe whether the pump operates normally. Then start the circulation oil pump, electric heating boiler simultaneously observe the pressure gauge indication on the thermal oil furnace; normally it should be between 0.2MPa and 0.4MPa; at this time, check the operating status of each pump and the sealing condition of each sealing surface. After the circulation pump has been running for about 3 to 5 minutes, press the adjustment heating and base power heating buttons to start the oil furnace heating up. During the initial heating process, adjust the base power heating group according to the required temperature in a timely manner to achieve the desired working condition.
[1] During the heating process, frequently observe the pressure gauge indication on the oil furnace. When the pressure indication is below 0.2MPa, promptly turn off one or several groups of base power heating. During normal heating, the pressure should be maintained at about 0.3MPa.
[2] For the vent valve on the reactor, do not close it completely during the first startup; it should be slightly open. After normal operation, it can be fully closed, but it is best to keep it slightly open. However, during future oil replenishment, this valve must be open.
[3] During the first startup, when the temperature rises to 170~180°C, the entire system should be insulated, and the insulation time should not be less than 6 hours.
[4] Temperature rise control: During the first startup heating, use 5°C as a heating stage (temperature on the oil return pipeline) for stepwise heating. Observe the pressure gauge indication; only proceed to the next stage of temperature adjustment when the pressure is normal. If unstable, perform group disconnection and insulation at that stage until the pressure stabilizes before proceeding to the next temperature stage adjustment. Control indicators: Pressure: 0.2MPa~0.4MPa
Temperature difference between pump inlet and outlet: 10~15°C
(3) Electric heating boiler shutdown: First, turn off the base power heating and adjustment heating groups, while observing the indication of the inlet and outlet temperature display. Only when the oil temperature drops below 100°C can the circulation oil pump be stopped.
