China Melamine Impregnated Paper is a kind of plain base paper or printed decorative paper impregnated with amino resin and dried to a certain degree, with a certain resin content and volatile content. It can be glued to each other or to the artificial board substrate by hot pressing. Part of the mixed condensate water can be used as water for washing machine and squeezing spray pipe, and can be used for washing, screening and oxygen bleaching of unbleached slurry.
The remaining mixed condensate can be sent to the hot water tank of the caustic chemical section, and used as slag filter and white mud filter washing, white mud tank and digester spray water, and various other spray and dilution water. Air stripped condensate is usually used for washing of unbleached slurry. Some pulp mills have also found that the effect of adding the air-stripped condensate to the mixed condensate before distribution and use is very good.
If the condensed water from each effect of the evaporator and the condenser is neither separated nor stripped, the condensed water should be managed and used according to its cleanliness. The cleaner process condensate is directly used for washing, screening and causticizing of unbleached pulp, and the condensed water is sent for air stripping treatment.
Cleaner condensate can be reused in warm water pipes or warm pools. The use of warm pools is very common nowadays. It improves water management and enhances the use of energy in series. Generally speaking, the temperature of warm water should be maintained in the range of 45-50°C, which can meet the water requirements in most cases. Excess warm water is drained into the trench or replaced with fresh water after cooling.
The above is an introduction to the relevant knowledge of China Melamine Impregnated Paper recycling condensate, I hope you can learn more.