In the thermal system of a thermal power plant, there are many parts that are easy to structure, such as the heating surface of the boiler, the heat exchange surface of the condenser, etc. listed below:
1. water quality is not good due to improper water treatment. If it is not qualified, it will often cause scaling of the heating surface of the boiler and superheater, resulting in a decrease in the thermal efficiency of the boiler, thus the treatment of steam and water water boiler water The system must be reinforced.
2. Due to the poor quality of soda and water, this will also cause salt to build up on the steam turbine blades. Therefore, the water quality of the thermal system must be ensured, as well as the quality of soda and water. must be strictly monitored to ensure the safe and economical operation of thermal equipmentpower plant.
3. In the thermal system of the thermal power plant, because the quality of the circulating cooling water is poor, the easiest part to structure is the heat exchange surface of the condenser, which needs to be cleaned regularly. Some power plants have also added rubber ball flushing devices to reduce scale on the heat exchange surface of the condenser.
The coal arrives from outside the factory and goes directly into the coal hopper of the boiler through a belt, or it is stored in the coal yard through a belt, then from coal yard to the boiler through a belt. . Of course, there must be equipment such as iron extractors, large block extractors and coal crushers along the way. The coal in the coal hopper of the boiler goes through the coal feeder, the coal crusher (the cfluidized bed boiler does not have a coal mill and directly burns the coal), the coarse powder separator and enters the furnace for combustion (if it is an intermediate storage pulverization system, the coarse powder After the separator, it should pass through the fine powder separator to the pulverized coal bunker, and the pulverized coal will enter the furnace through the coal feeder for combustion).
The water comes from the chemical water production workshop and is brought to the degasser or condenser. From condenser through condensate pump, mechanical seal heater, low pressure heater, to deaerator, then via high pressure heater to boiler economizer, water wall, drum of steam (DC boiler does not have steam drum), superheater to The high pressure cylinder of the steam turbine finishes its work then returns to the boiler heater to le heating. It then goes to the medium and low pressure cylinders of the steam turbine, then to the condenser for cooling. a complete cycle.