Preparation of paraffin emulsion with waste water from medium density fiber plate defibrator system

Abstract

The process of preparing paraffin emulsion with waste water from medium density fiber plate defibrator system features that paraffin emulsion is prepared with solid paraffin and the waste water from medium density fiber plate defibrator system as main material, stearic acid and triethanolamine as emulsifier, ammonia water as catalyst, and sodium carboxymethylcellulose as colloid protectant. The process is simple, and the paraffin emulsion is used for the production of medium density fiber plate. Reusing partial waste water can reduce the quantity of waste water to be treated.

Description

technical field

[0001] The invention relates to the technical field of medium-density fiberboard production, in particular to a method for preparing paraffin emulsion by using waste water from a heat-grinding system for medium-density fiberboards. Background technique

[0002] The production of MDF generally uses paraffin as a waterproofing agent. There are two common methods of applying paraffin. One is to melt the solid paraffin and add it to the grinding chamber from the screw of the cork, so that the paraffin is mixed with the wood fiber under the action of mechanical kneading. The other is to prepare solid paraffin into an emulsion, mix it with the adhesive and add it from the spray pipe or add it from the spray pipe alone. The paraffin emulsion is mixed with wood fiber to play a waterproof role. The cork screw extrusion water in the production process of medium density fiberboard needs to be treated before it can be discharged or reused in accordance with environmental...