Treatment system and treatment method for papermaking sludge of recycled paper

Abstract

The invention relates to a treatment system for papermaking sludge of recycled paper. The treatment system comprises a sedimentation tank, filter pressing equipment and drying equipment which are arranged in sequence. The filter pressing equipment comprises a vertically-arranged filter pressing cylinder, an inverted-cone-shaped rotating shaft with the axis vertically arranged is rotationally connected into the filter pressing cylinder, a spiral belt with the outer side capable of abutting against the inner circumferential face of the filter pressing cylinder is fixedly connected to the rotating shaft, the screw pitch of the spiral belt is gradually reduced from bottom to top, and a plurality of water leakage holes are formed in the spiral belt. A driving mechanism capable of driving the rotating shaft to rotate is arranged on the filter pressing cylinder, a second inverted-cone-shaped heating cavity is formed in the middle of the rotating shaft along the axis of the rotating shaft, and a second heating mechanism is arranged in the second heating cavity. A sludge conveying device capable of conveying sludge to the lower end of the filter pressing cylinder is arranged between the sedimentation tank and the lower end of the filter pressing cylinder. A sludge transfer device is arranged between the upper end of the circumferential surface of the filter pressing cylinder and the drying equipment. The system has the effects of improving and reducing the humidity of the paper mill sludge and achieving air drying of the paper mill sludge.

Description

technical field [0001] The present application relates to the field of recycled paper production, in particular to a treatment system and method for papermaking sludge of recycled paper. Background technique [0002] Paper is the most commonly used item in our daily life. Whether we are reading or reading newspapers, or writing or drawing, we must come into contact with paper. In the production of industry, agriculture and national defense industry, paper is also inseparable. Existing papermaking equipment A lot of sludge will be generated, which needs to be treated. [0003] Except for the part of the sludge that is comprehensively utilized, the rest is disposed of in sanitary landfills, requiring more than 70 mu of land to be buried every year, which wastes land resources and produces secondary pollution. Papermaking sludge is a biological solid waste, which not only contains a large amount of cellulose organic matter and plant nutrients such as nitrogen, phosphorus, and ...

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Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that although the sludge in the current technology has been dehydrated through dehydration of papermaking sludge, the sludge is generally air-dried and has relatively high humidity, so it is difficult to use as a soil conditioner.

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