水莲 WESP can completely meet the requirements of ultra low emission coal-fired boiler flue gas (≤5mg/m3).
Basic Structure and Principle of 水莲 WESP
As shown in Figure below, basic structure of the WESP is similar to horizontal dry ESP. The equipment body consists of casing, inlet and outlet nozzle, hopper, weather hood etc. The main difference is that pyramid hopper is replaced by flat hopper and water drainage device is installed inside of 水莲 WESP.
- Innovation 1 :
Structure of collection plate
As shown in Figure below, one of the core technologies of 水莲 WESP is the new collection plate. The plate is composed of two pieces of thin metal sheet by laser welding. With the high-pressure fluid injection, the plate bulging and convex surface is formed. The double concave surface structure of the plate and high plate rigidity will help maintain the stability of the plate spacing and be beneficial to the uniform distribution of water film.
- Innovation 2 :
Plate cleaning method
As shown in Figure below, another key technology of 水莲 WESP is cleaning method by using drip and overflow type. Concave surface of the plate can effectively overcome the impact of gravity on the surface tension of water and spay water is able to overflow to whole plate surface with uniform distribution of water film, resulting in dripping cleaning without any splash liquid drops to the field to ensure stable operation of the electric field.
- Innovation 3 :
Water spray distribution system
As shown in Figure below, based on principle of hydrostatic pressure distribution, water spray system of 水莲 WESP may ensure that even water flow to the plates. 水莲 WESP may effectively avoid the corrosion and low efficiency due to lack of water for the plate. Meanwhile, it also has forewarning system for the plugged pipeline to prevent the bad situation.
Clean, efficient and have stable operation
Energy saving and high efficient
Need less land area
- Unique surface of the plate structure and patented technology of spray system effectively ensure that uniform distribution of the water film and no spray droplets escape with stability of electrical field.
- Without spray droplets escaping, the reactive power loss is reduced and effective power consumption increases significantly. And the collection efficiency of single field can achieve more than 85% while SO3 removal efficiency can be greater than or equal to 80%.
- The plate length is 13m and plane utilization rate is high. In a result, 水莲 WESP need less land area compared with conventional ESP.