Pneumatic ash transport is a method of conveying coal ash in pipeline with the help of some pressure equipment, which is widely used in the ash transport system of power plant warehouse pump. The power plant warehouse pump pneumatic ash transport system adopts concentrated phase pneumatic ash transport device, the system air source pressure is 0.7mpa, the ash transport device is equipped with feed valve and discharge valve. The installation position above the warehouse pump is the feed valve. Because the feed valve is opened every 10 minutes, the wear of coal dust on the valve is serious. The service life of traditional valves is generally within three months, and the installation and maintenance cost of power plants is high.
Metal seated valve are widely used in electric dust removal system with a history of hundreds of years.But restricted by metal material properties, the metal seated valve can not adapt to abrasive medium working in serious condition ,so metal seated valves will be leaked serious after working in short life,and it will affect the stability of the system operation greatly.So traditional metal seated valves are in need of radical innovation in materials, design and manufacturing process.
Because the Engineering ceramic has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance, it replace hard ally sealing material successfully . The pneumatic ceramic lined double disc gate valve has obtained higher corrosion resistance and wear resistance. This ceramic lined gate valve can be widely used in power plant, steel plant dust removal system, slag removal system, warehouse pump ash transport system. Especially in silo pump ash transport system engineering, ceramic lined valve can solve the problem of high solid content with wear in feed and discharge.
The photos show the pneumatic ceramic lined double disc gate valve instead of metal sealing gate valve working in pneumatic ash transport at some Indonesia coal power plant.
