Method for regenerating corrugated paper by paper mill sludge cracking

Abstract

The invention discloses a method for regenerating corrugated paper by paper mill sludge cracking. By means of a papermaking process in which paper mill sludge is subjected to pressurized liquefying, low-temperature cracking, separating and dewatering, filter pressing and the like to be suitable for regenerating corrugated medium paper in a paper mill, the paper mill sludge is better recycled; besides, a low-temperature cracking technology is adopted in the paper mill sludge pretreating process, and no chemical agent is needed; meanwhile, waste gas generated in the paper mill sludge treating process is centralizedly treated, secondary pollution is avoided, and the paper mill sludge treating process further reduces the cost and has higher environmental friendliness.

Description

technical field

[0001] The invention relates to the technical field of using recycled paper to make paper, in particular to a method for cracking recycled corrugated paper with papermaking sludge. Background technique

[0002] In the prior art, raw pulp papermaking includes the processes of pulping and papermaking. Both processes will produce a large amount of papermaking sludge. The content of papermaking sludge is rich, with an organic matter content of 40%-50%, mainly containing cellulose, hemicellulose and High molecular organic matter such as lignin and papermaking sludge have a certain recycling value. At present, most papermaking sludge treatment methods are mainly incineration and sanitary landfill. The incineration is recovered in the form of heat energy, and the utilization rate is extremely low, and it will cause air pollution. However, sanitary landfill will waste land resources, produce secondary pollution, and cause a huge waste of renewable resources. Therefor...