Technology of manufacturing paper for daily use by caragana microphylla and salix mongolica as raw material for making pulp
A technology for household paper and pulping, which is applied in the fields of cellulose raw material pulping, papermaking, and paper making machines, etc., can solve the problems of inability to achieve the technical level of production of household paper, and achieve environmental improvement, broad market prospects, and environmental improvement. Effect
Active Publication Date: 2009-09-23
宁夏同创秸科生物科技有限公司
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Problems solved by technology
The Chinese patent discloses two methods of making paper with willow salix as raw material, among which "making boxboard and corrugated base paper from willow salix" (patent application number: 96117325.4) discloses a process for making low-grade paper-corrugated paper from willow salix , "Pulping and papermaking by Salix immonium method" (patent application number: 00113846.4) discloses a technique for making wrapping paper with Salix salix as raw material. Requirements for the production of household paper with higher technical level and higher product grades from Salix salix as raw material
Method used
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Experimental program
Comparison scheme
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Embodiment Construction
[0025] 1. Pulping
[0026] 1.1 Dry preparation:
[0027] Caragana or Salix salix grown for 3 years in the desert area is used, cut into 15-35mm long flakes by a grass cutter, and the moisture content of the flakes is 10-30%. Dipping machine for pre-soaking, and then into the steamed balls through the pot loader.
[0028] 1.2 Batch cooking:
[0029] The flakes from the material preparation section are mixed with the cooking liquid, and then go through the spiral prepreg machine, the pot loader, and then enter the steaming ball for cooking. The cooked coarse slurry is sprayed into the spray bin, or poured into the ball pool. The bottom of the spray bin adopts a screw propeller, and the double-screw squeezer squeezes out the black liquor, and the coarse pulp is diluted with white water and then falls into the flushing tank.
[0030] 1.3 Washing section:
[0031] The coarse pulp from the flushing tank is pumped to the jump screen for rough separation, then washed by the filte...
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Abstract
The present invention relates to a technique for pulping and papermaking of household paper using caragana or Salix salix as raw materials, mainly comprising two parts: pulping and papermaking, wherein the pulping process includes dry material preparation, intermittent cooking, washing and bleaching; papermaking The process includes beating and copying. It is characterized in that caragana or salix is used as raw material for dry preparation, and it is cut into 15-35mm long flakes by a grass cutter. The moisture content of the flakes: 10-30%; the process parameters of batch cooking For: pot loading: 5.0-6.0t / ball (air-dried); cooking alkali: 18-22%; AQ dosage: 1.8-2.0kg / ball; Na2SO3 dosage: 75-100kg / ball; cooking pressure: 0.65- 0.8MPa; liquid ratio: 1:2-3; temperature of liquid entering the steamed ball: ≥80°C; concentration of liquid: 80-100g / l; cooking time: 4-5 hours; bleaching temperature: 35-45°C; Pulp yield: ≥40%; Coarse pulp hardness: 9-20 (KMnO4 value).
Description
Technical field: [0001] The invention relates to the technical field of papermaking, in particular to a technique for making household paper by pulping caragana or Salix salix as raw materials. Background technique: [0002] Caragana is a drought-resistant shrub species that grows in desert areas. It has the functions of windbreak, sand fixation, and water and soil conservation. The plant height is 1.5 to 3.0 meters. dead. In recent years, due to the country's implementation of the preferential policy of returning farmland to forests, the area of artificially planted caragana has continued to expand. [0003] Salix salix is a shrub that grows in desert areas, and has the functions of windproof and sand-fixing; Salix salix grows fast and has a short cycle, with an average diameter of 2-3cm and a height of more than 3m in three years; More new branches will be produced in two years, otherwise it will die naturally; in recent years, due to the strengthening of sand contro...
Claims
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Login to View More IPC IPC(8): D21C3/22D21F1/00
Inventor 张东红于振强王永徐和刚
Owner 宁夏同创秸科生物科技有限公司