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Method for producing pulp by potassium containing compound as steaming preparation with cellulose containing raw material

A potassium compound and cellulose technology, applied in the fields of papermaking and chemical industry, can solve the problems of limited pulping scale, reduced addition amount, and large investment in pulping waste liquid treatment, avoiding direct discharge, reducing pulping costs, and operating costs. reduced effect

Inactive Publication Date: 2005-03-02
孙玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the pulping process of potassium compound cooking agents, sodium compounds or ammonium compounds, which can be used as nutrient elements in the fertilizer components made from waste liquid, but whose price is far lower than potassium compounds, are introduced to replace part of potassium compounds as cooking agents, so that The addition of expensive potassium compound cooking agents is greatly reduced, and the pulping waste liquid is treated at low operating costs to overcome the large investment in pulping waste liquid treatment and the limitation of pulping scale in the existing technology; medium and small papermaking Pulping waste liquid cannot be treated or the defects of high operating costs can be treated to meet the production needs of pulping and papermaking enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a batch digester with a volume of 15 liters, 3050 grams of prepared wood chips were used, and the water content in the wood chips was 955 grams. The liquid ratio is 1:6, and the absolute dry weight percentage of the sodium compound addition and the wood chips in the cooking agent is 0.1% (the sodium compound addition is 2 grams); the potassium compound addition and the absolute dry weight percentage of the wood chips are 30% (potassium compound addition). The amount of the compound added is 629 grams); without adding ammonium compounds and cooking aids, cooking at elevated temperature is performed. Heating and heating from the ambient temperature to 105 °C for a small steam release, and then continue to heat up to a maximum temperature of 172 °C. The heating time was 180 minutes in total, and the holding time at the highest temperature was 120 minutes.

[0019] After the cooking is completed, the cooking waste liquid and chemical pulp are released from the digester,...

Embodiment 2

[0022] In a batch cooker with a volume of 15 liters, 2,800 grams of prepared bamboo chips were used, and the water content in the bamboo chips was 552 grams. The liquid ratio is 1: 6, and in the cooking medicament, the added amount of the sodium compound and the absolute dry weight percentage of the bamboo chips are 20% (the added amount of the sodium compound is 450 grams); the added amount of the potassium compound and the absolute dry weight percentage of the bamboo chips are 0.1% (The added amount of the potassium compound is 2 grams); the added amount of the ammonium compound is 5% of the absolute dry weight of the bamboo chips (the added amount of the ammonium compound is 141 grams). The added amount of the cooking aid and the absolute dry weight percentage of the bamboo chips are 2% (the added amount of the cooking aid is 45 grams), and the heating is carried out for cooking. Heating and heating from the ambient temperature to 105 ° C for a small steam release, and then...

Embodiment 3

[0026] In a batch digester with a volume of 15 liters, 1100 grams of wheat straw after preparation was used, and the water content in the wheat straw was 88 grams. The liquid ratio is 1:6, and the added amount of sodium compound and the absolute dry weight percentage of wheat straw in the cooking agent are 10% (the addition amount of sodium or ammonium compound is 132 grams); the added amount of potassium compound and the absolute dry weight percentage of wheat grass are 15% (The addition amount of potassium compound is 152 grams); The addition amount of ammonium compound and the absolute dry weight percentage of wheat straw are 10% (the addition amount of ammonium compound is 101 grams); The addition amount of cooking aids and the absolute dry weight percentage of wheat grass are 1% ( The cooking aid was added in an amount of 10 grams), and the temperature was increased for cooking. Heating and heating from the ambient temperature to 105 ° C for a small steam release, and the...

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PUM

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Abstract

The present invention belongs to the field of chemical and papermaking, and is the process of producing pulp with potassium compound-containing digestion preparation for cellulose material. The production process includes the following steps: digesting cellulose material with potassium compound-containing digestion preparation to obtain mixture of paper pulp and pulp making waste liquor; extracting pulp making waste liquor and washing pulp material; concentrating pulp making waste liquor; and spray drying the concentrated waste liquor to produce organic potash fertilizer, which is further produced into re-mixed organic fertilizer with other chemical fertilizer material. The said technology can utilize papermaking waste liquor comprehensively at low cost and avoid the pollution to water.

Description

1. Technical field [0001] The present technology relates to the fields of chemical industry and papermaking, in particular to a method for producing cellulose by removing non-cellulose substances from cellulose-containing raw materials. 2. Background technology [0002] The existing alkaline pulping is mainly the sodium-alkali method. In large-scale pulping mills, pulping waste liquid is treated by a well-known alkali recovery method, that is, the waste liquid is concentrated and evaporated, and then burned and causticized. Production of sodium hydroxide for reuse. This process scheme is only suitable for large-scale enterprises, while medium and small pulping enterprises cannot adopt it due to their large investment and high technical level. Sodium-alkali pulping black liquor cannot be directly used as agricultural fertilizer because it contains too much sodium ions, which is harmful to plant growth. Ammonium sulfite pulping waste liquid can be directly used as agricultur...

Claims

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Application Information

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IPC IPC(8): D21C3/00D21C3/04D21C3/24D21C11/00
Inventor 孙玲
Owner 孙玲
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