Production process of high-quality broad weed tree chemi-mechanical pulp
Through process steps such as screening, washing, and alkaline pre-steaming, the problem of using raw materials for pulp production of pulp is solved, and the production of high-quality pulp and saving of wood resources is achieved.
CN119711233APending Publication Date: 2025-03-28YUEYANG FOREST & PAPER CO LTD
7 Cites 0 Cited by
Patent Information
- Application Number
- CN202510042612.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
The existing chemical slurry production process is difficult to effectively utilize the broad-mulse wood fiber raw materials of various tree species, resulting in tight fiber raw material resources and waste of wood resources.
Method used
The high-quality slurry is used as the fiber raw material, and high-quality slurry is produced through the process steps of wood chip screening, washing, alkaline pre-steaming, extrusion and tearing, pre-impregnation, slurrying and bleaching.
Benefits of technology
The use of broad wood to produce high-quality slurry, broaden the raw material resources of slurry, save wood resources, and meet the requirements of green environmental protection policies.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a production process of high-quality broad-leaved wood chemi-mechanical pulp, and belongs to the field of papermaking pulping, and the method comprises the following steps: adopting broad-leaved wood chips as fiber raw materials, and sequentially carrying out wood chip screening, washing and alkaline pre-cooking treatment to obtain a treated wood chip material; the length of the screened broad weedtree chips is 19-50mm, and the screened broad weedtree chips comprise less than 5% of pine chips and less than 5% of dark chips; the temperature of alkaline pre-cooking treatment is 85-95 DEG C, and 20-30 kg / ton of sodium hydroxide is adopted for treatment; carrying out first-section extrusion tearing, first-section pre-impregnation, second-section extrusion tearing and second-section pre-impregnation on the wood chip material subjected to alkaline pre-cooking treatment; and carrying out first-stage pulping, first-stage bleaching, second-stage pulping and concentration on the material subjected to second-stage pre-impregnation to obtain finished pulp. The pulping product is good in quality, raw material resources of the chemithermomechanical pulp can be effectively broadened, and the method has great significance in the aspects of wood resource saving and environmental protection benefits.
Need to check novelty before this filing date? Find Prior Art