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Method for preparing sugarcane dreg bleaching pulp

A technology of bagasse and pulp, which is applied in pulp beating/refining methods, pulp bleaching, textiles and papermaking, etc. It can solve the problems of waste of raw materials, difficult biochemistry of middle-stage water, and large investment, and achieve low alkali consumption and low cost. low effect

Inactive Publication Date: 2016-02-03
XINJIANG GUOLIYUAN INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bagasse used for papermaking in my country is not satisfactory, only about 1 / 3 of the existing bagasse, and a lot of raw materials are wasted every year
Mainly due to the existing papermaking technology, the existing bagasse papermaking mostly uses the traditional alkali method and the sulfate method. With this kind of technology, alkali recovery equipment must be installed, which requires large investment and high cost. The middle water is difficult to biochemically, which makes many enterprises daunting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) After the bagasse is measured by the spiral weighing scale, it is sent to the washing machine by the belt conveyor to wash away the dust, sand and residual liquid.

[0017] (2) Cooking pretreatment: dehydrate the washed bagasse with a screw dehydrator, and then send it to the horizontal tube continuous steamer, add 2.5-3% KOH and 0.2-0.3% anthracene per ton of absolute dry bagasse For quinone, cook for 45-50min at a temperature of 90-95°C, with a solid-to-liquid ratio of 1:4.5.

[0018] (3) Primary bleaching: Send the coarse stock after cooking and pretreatment in step (2) into a twin-screw refiner, and add 2.2-2.5% polyacrylamide, 1- 1.2% EDTA and 2.5-3% H 2 o 2 , the outlet temperature of the twin-screw refiner is controlled at 100-105°C, and the pulp after grinding is sent to the reaction chamber, and after 50-60 minutes of reaction, two-stage reverse washing is carried out.

[0019] (4) Secondary bleaching: send the pulp washed in step (3) into a twin-screw r...

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PUM

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Abstract

The invention discloses a method for preparing sugarcane dreg bleaching pulp. The method comprises the following steps: sending sugarcane dregs with impurities removed into a steaming device, adding 2.5 to 3 percent of KOH and 0.2 to 0.3 percent of anthraquinone, and steaming for 45 to 50 minutes at 90 to 95 DEG C; sending the steamed material into a double-screw pulping machine, adding 2.2 to 2.5 percent of polyacrylamide, 1 to 1.2 percent of EDTA and 2.5 to 3 percent of H2O2, wherein the temperature of a discharged material is 100 to 105 DEG C, grinding the material, reacting for 50 to 60 minutes, sending washed pulp into the double-screw pulping machine, adding 2.2 to 2.5 percent of sodium tripolyphosphate, 1 to 1.2 percent of magnesium sulfate and 5 to 5.5 percent of H2O2, wherein the temperature of a discharged material is 100 to 105 DEG C, grinding, then reacting for 50 to 60 minutes, and washing to obtain the sugarcane dreg bleaching pulp. By adopting the method, the pulp yield can reach 70 to 75 percent, the sewage is likely to biochemically treat, and the cost is low.

Description

technical field [0001] The invention relates to a method for preparing bagasse bleached pulp. Background technique [0002] As the main source of sugar cane raw materials in my country, sugarcane has a large planting area every year. Taking 2014 as an example, the total output of sugarcane in my country reached 128.2 million tons, and the output of bagasse was about 29.486 million tons. Excluding the 22.409 million tons burned by the sugar factory's own boiler, the remaining bagasse was 7.077 million tons per year. Among them, 50% of the fibers can be used for papermaking, which means that 3.538 million tons of bagasse raw materials can be used for papermaking every year. However, the bagasse used for papermaking in my country is not satisfactory, only about 1 / 3 of the existing bagasse, and a lot of raw materials are wasted every year. Mainly due to the existing papermaking technology, the existing bagasse papermaking mostly uses the traditional alkali method and the sulfa...

Claims

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Application Information

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IPC IPC(8): D21C5/00D21C9/10D21C9/16D21D1/34
Inventor 腾铁生张跃平
Owner XINJIANG GUOLIYUAN INVESTMENT