T/SDPAA T/SDPAA0002.2-2023 Active Group standards

T/SDPAA T/SDPAA0002.2-2023 Unbleached Straw Biochemical Mechanical Pulp Part 2: Pulp Drying Technology Specification

Publish Date: 2023-10-15 Implement Date: 2023-11-15 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/SDPAA T/SDPAA0002.2-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Light industry, culture, and daily necessities

ICS Name: \nPulp

Publish Date: 2023-10-15

Implement Date: 2023-11-15

Scope

Scope: This document specifies the requirements for raw materials, chemical treatment, biological treatment, pulping equipment, biological enzymes, technical specifications, pulping process, pulping quality, environmental protection and energy conservation, equipment maintenance, and safe production for unbleached straw biochemical mechanical pulp. This document applies to the pulping technical requirements of unbleached straw biochemical mechanical pulp. Main technical content: 4. Pulping equipment: Pulping equipment uses disc mills or cone mills. Chemical treatment and pulping are carried out under normal pressure or pressurized conditions (≤0.6 MPa). The teeth of the pulping discs should be selected to minimize cutting, fiber separation, and fibrillation. It is recommended that the tooth width be 1.2 mm to 1.8 mm, the groove width be 1.6 mm to 2.9 mm, and the tooth height be 5.0 mm to 6.5 mm. Pulping equipment typically uses DCS control systems to online monitor or control process parameters such as concentration, temperature, and pressure. 5. Biological enzymes: They should be adaptable to temperatures (50℃ to 90℃) and pH (8 to 12), have high activity, and short reaction times. Single or compound enzymes should have stable performance and be able to achieve different pulping effects. 6. Technical specifications: Strict pulping operation procedures should be established, and operators should be skilled in operating pulping equipment. Based on the characteristics of raw materials, pre-pulping slurry characteristics, pulping machine configuration, and process flow, scientific process procedures should be formulated to determine pulping process requirements and technical parameters, ensuring the target quality of pulp. Detecting methods and professional inspectors should be available for the quality of chemicals and biological agents used. 7. Pulping process: High-concentration pulping (10% to 30%) should be carried out according to GB/T 5399. Normal-pressure or pre