It is understood that Yantai Wanhua Group needs to use caustic soda and hydrochloric acid for neutralization in the production of diphenylmethane diisocyanate (MDI). The waste brine produced in the past has been treated to meet the standard and discharged to the sea. On the one hand, a large amount of industrial salt and industrial pure water are lost in vain; on the other hand, it is necessary to use the purchased raw salt as a raw material for caustic soda production. Due to the complexity of the water quality of MDI waste brine, if it is to be processed to meet the requirements of ion-exchange membrane caustic soda production, it is technically difficult, and domestic and foreign companies have not implemented relevant projects.
Yantai Wanhua Group adopts the MDI waste brine treated by this technology to meet the requirements of the control index for the use of brine in the production of ion-exchange membrane caustic soda. The technology is reliable and safe to use, and can be applied to industrial production. The successful development of this technology has basically solved the problem of waste brine treatment that plagues MDI manufacturers.
Flange is also called flange or flange. The flange is the part that makes the pipe and the pipe connect with each other, and is connected to the pipe end. There are holes in the flange, and the bolts make the two flanges tightly connected. The flange is sealed with gasket. Flange is divided into threaded connection (threaded) flange and welding flange. Stainless Steel Flange is a widely used chromium nickel stainless steel, which has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It is resistant to corrosion in the atmosphere. If it is an industrial atmosphere or heavily polluted area, it needs to be cleaned in time to avoid corrosion. Suitable for food processing, storage and transportation. It has good machinability and weldability.
Stainless Steel Flange
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