The combined electrostatic precipitator uses high-voltage direct current to charge the dust particles in the dust-laden gas. Under the action of the electric field force, the dust particles are deposited on the sedimentation surface. Then, through the action of the vibration force, the flake dust falls into the device, thereby purifying the flue gas passing through the electrostatic precipitator and meeting environmental emission standards. The combined electrostatic precipitator is an ideal equipment for purifying industrial waste gas such as thermal power generation, metallurgy and non-ferrous metals.
The combined electrostatic precipitator combines three compound dust collection mechanisms, namely electric cyclone, electric shock and electric coagulation, into one, with high efficiency and is suitable for building materials, metallurgy, chemical industry, electric power and other industries; it can control pollution, recycle materials and is used in cement mill dust collector.
Combined electrostatic precipitators can be divided into two types: tubular and plate. Tubular ESPs have an electrode installed in the center of a circular tube, with the inner wall of the tube forming the dust collecting surface. These are often constructed using multiple rows of tubes arranged in parallel. Plate ESPs have discharge electrodes installed between a series of parallel channels. Based on the direction of airflow, they can be categorized as vertical or horizontal. Vertical ESPs are generally tubular, with airflow flowing from bottom to top, and typically operate under positive pressure. Horizontal ESPs have horizontal airflow and are generally used in industry due to their higher separation efficiency and ease of maintenance.
Maintenance and use of combined electrostatic precipitator:
After the combined electrostatic precipitator is repaired, the overall no-load boost debugging is carried out and the volt-ampere characteristic curve is drawn. After the smoke is vented, the overall load debugging is carried out, and the control parameters are further adjusted according to the operating conditions to make it operate in the best state. The vibration height is calibrated and adjusted. The vibration parameters are set, the vibration display height is adjusted, and the actual working height of the vibration device is calibrated. The resistance of the vibration coil and the insulation resistance to ground are measured. Cable inspection and resistance measurement are carried out. The resistance of all electric heaters in the insulation box and the insulation resistance to ground are checked, the insulation resistance of the electric heater cables are checked, and damaged components are replaced. The resistance of the ash hopper electric heater and the insulation resistance to ground are checked, the insulation resistance of the electric heater cables are checked, and damaged components are replaced.
Application scope of combined electrostatic precipitator
1. Industrial and heating coal-fired boilers, heavy oil-fired boilers.
2. Building materials: dry and wet process cement rotary kilns, vertical kilns, raw and clinker mills, raw material dryers and cement packaging machines.
3. Non-ferrous smelting: copper, lead, zinc sintering, copper smelting furnace, electric arc furnace, reverberatory furnace, etc.
4. Metallurgy: iron ore sintering machine (head and tail), blast furnace, open hearth furnace, coke oven, converter, electric arc furnace and refractory industry.
The design efficiency of the combined electrostatic precipitator is within the range of 85%-90%. When determining the treatment efficiency, the principle of economy should be followed according to the relevant emission standards. A lower efficiency should be selected whenever possible while still meeting the emission standards.
