Environment-friendly clean pulping process
A clean pulping and process technology, applied in the field of papermaking and pulping, can solve the problems of backward process, high production cost, large fuel consumption, etc., and achieve the effects of optimizing the pulping process, reducing production costs, and reducing equipment investment.
Active Publication Date: 2014-05-28
谢明文
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Problems solved by technology
[0009] It can be seen from the above that the current pulping technology is backward, consumes a lot of fuel, wastes a lot of resources and water, and produces a lot of waste gas, waste water and waste residue at the same time, and the production cost is high and the environment is seriously polluted.
[0010] In addition, part of the improved pulping process removes the boiler and directly uses cold water circulation, but the cold water circulation has defects such as long production cycle and great environmental impact, which cannot meet the production requirements
Method used
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[0063] Below in conjunction with specific embodiment, the present invention is further explained and illustrated, and "part" described in the embodiment all refers to "weight part":
[0064] An environmentally friendly and clean pulping process, see pulping process figure 1 , using an air energy hot water pump to provide circulating water for pulping, and the temperature of the circulating water is 50°C;
[0065] (1) The pulping formula includes:
[0066] Pre-dipping agent: table salt, diisooctyl sulfosuccinate monosodium salt, ethanol with a volume concentration of 95%, calcium percarbonate (2CaCO 3 ·3H 2 o 2 )
[0067] Chelating Agents: Sodium Citrate, Opal.
[0068] Activator: tetraacetylethylenediamine, sodium nonanoyloxybenzenesulfonate, acetone (industrial grade).
[0069] Bleach: Peroxysulfuric acid (H 2 SO 5 ), potassium hydrogen peroxysulfate (KHSO 5 ).
[0070] Water treatment agent: polyaluminum chloride, acrylamide grafted starch, FeSO 4 .
[0071] Bind...
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Abstract
The invention belongs to the field of paper-making pulping and particularly relates to an environment-friendly clean pulping process. The pulping process comprises four steps of: mechanical grinding, bleaching by using active hyperoxide, cyclic utilization of pulping residual water and comprehensive utilization of pulping tailing. According to the method, the mechanical grinding is used to replace chemical cooking for the pulping; environment-friendly chemicals are used for replacing conventional chemicals; the pulping process is changed; an air-source hot water pump is used to replace a boiler to provide hot-water circulation; and the purpose of environment-friendly clean pulping is achieved.
Description
technical field [0001] The invention belongs to the field of papermaking and pulping, and in particular relates to an environmentally friendly and clean pulping process. Background technique [0002] At present, more than 70% of the current domestic and foreign pulping processes use chemical pulping and liquid chlorine bleaching, which has serious environmental pollution and technical defects. [0003] First, chemical pulping uses boilers, which consume a lot of fuel and pollute the air. The standard coal consumption per ton of pulp in foreign countries is 0.9-1.2 tons, and the standard coal consumption per ton of pulp in China is 1.38 tons. [0004] Second, the pulp yield of chemical pulp is low, about 48-55%, while 3.6 tons of reed air-dried material can make one ton of pulp, and the pulp yield is 28%. million tons. [0005] Third, the current pulping chemicals are mainly NaOH, NaOH 2 S, chlorine, etc., produce a large amount of black liquor, white water, waste gas and...
Claims
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IPC IPC(8): D21C3/26D21C9/16D21C9/02
Inventor 谢明文于翔
Owner 谢明文