Waste paper regenerating process and apparatus thereof

Abstract

The invention relates to the field of paper making, in particular to a waste paper regenerating process. Waste paper is cleaned in a stockyard for standby use and then decomposed by a fiber decomposer. Decomposed paper pulp is discharged in a pulp pond, pumped by a stock pump to a pulping machine for kneading, and then enters another pulp pond. The paper pulp is pumped by the stock pump to a material box and is fed into a mixing pond in a rated manner from the material box. The paper pulp then undergoes sand removal performed by a desander and enters a net cage of a net box so as to be shaped to be a paper sheet. A special water spraying device is arranged in the net box for cleaning the net cage. Then, the paper sheet is printed on a blanket and undergoes vacuum dehydration in a vacuum machine. After the vacuum dehydration, the paper sheet undergoes pressing and water extrusion in a presser and then enters a drier for drying, and a finished product is obtained. Steam water is generated in the drier, the blanket is cleaned by the water spraying device, and white water is generated and recycled to the fiber decomposer. The process is simple and ordered, realizes that waste paper regeneration does not generate pollution again, saves 85 percent of water, 20 percent of electricity and 80 percent of chemicals, achieves 100 percent fiber utilization rate and directly reduces 15 percent of production cost.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a waste paper regeneration process and equipment thereof. Background technique [0002] my country is a country short of fiber and water resources. The pollution of water resources has brought many disasters to the people. The industrial output value of the paper industry only accounts for 10% of the country's total, while the pollution generated accounts for 1 / 6 of the country's pollution sources. According to the conventional papermaking process, production One ton of finished paper generally has more than 5% fiber loss. The annual demand for paper in the country is 65 million tons, and it is still growing. Therefore, 3.5 million tons of fiber loss will cause pollution every year, equivalent to RMB 6.5 billion. , According to the existing pollution control methods, whether it is equipment or drug treatment, experience has proved that it is not feasible, and the cost is too high, and th...

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Problems solved by technology

[0002] my country is a country short of fiber and water resources. The pollution of water resources has brought many disasters to the people. The industrial output value of the paper industry only accounts for 10% of the country's total, while the pollution generated accounts for 1 / 6 of the country's pollution sources. According to the conventional papermaking process, production One ton of finished paper generally has more than 5% fiber loss. The annual demand for paper in the country is 65 million tons, and it is still growing. Therefore, 3.5 million tons of fiber loss will cause pollution every year, equivalent to RMB 6.5 billion. , according to the existing pollution control methods, whether it is equipment or drug treatment, experience has proved that it is not feasible, and the cost is too high, and there is re-pollution

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