GB/T 41228-2021 in English
VALIDGeneral technical requirements for humidity control in cotton processing
- Issued on:2021-12-31
- Implemented on:2022-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 41228-2021 |
| Document status: | VALID |
| Title in English: | General technical requirements for humidity control in cotton processing |
| Title in Chinese: | 棉花加工调湿通用技术要求 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2021-12-31 |
| Implemented on: | 2022-07-01 |
| ICS Classification: | 65.040.20-Buildings and installations for processing and storage of agricultural produce |
| Chinese Classification: | B93-Agricultural products and feed processing machinery |
| Professional Classification: | GB-National Standard |
| Related Keywords: | humidity control
humidity control equipment cotton processing humidity control unevenness humidity control capacity |
| Related Topics: | cotton
Cotton Quality Requirements Cotton primary processing equipment cotton processing cotton processing main uses of cotton processed cotton GBT41228 GB/T 41228-2021 wet Nantong humidifier eppendorf humidification technology Industrial humidifier |
《GB/T 41228-2021棉花加工调湿通用技术要求》由TC407（全国棉花加工标准化技术委员会）归口，主管部门为中华全国供销合作总社。
Introduction
Interpretation of the core content of the standard
GB/T 41228-2021 systematically regulates the technical requirements of humidity control equipment for humidity control in cotton processing for the first time, focusing on solving the problem of accurate control of cotton fiber moisture regain. The standard innovatively defines two core indicators: humidity control unevenness (≤1%) and humidity control capacity (drying ≥3.5%/humidification ≥1.0%).
Key technical requirements
| Process links | Moisture regain range | Temperature limit | Special requirements |
|---|---|---|---|
| Before seed cotton cleaning | 4.5%-5.5% | ≤175℃ | Should not be burnt or yellowed |
| Before lint cotton packaging | 6.5%-8.5% | Should not be contaminated or deteriorated |
Analysis of Implementation Points
Solutions to Typical Problems
Case 1: When a cotton ginning factory in Xinjiang adopted a two-pass seed cotton drying process, the moisture regain after the second pass of drying fluctuated by 2.3%. After adjusting the detection points according to clause 6.1.1.2 of the standard, the problem of uneven hot air mixing was confirmed, and the unevenness was reduced to 0.8% by adding a mixing valve.
Background of Technological Evolution
Compared with traditional processes, this standard has three major breakthroughs: ① Clearly distinguish between different processes of hand-picking cotton and machine-picking cotton (Appendix A); ② Introduce requirements for online automatic control systems (4.2.10); ③ Specify real-time monitoring methods for hot air temperature (clause 6.4).
Safety protection specifications
- High-temperature pipelines must be equipped with GB 2894 standard safety signs
- Closed systems must be equipped with pressure alarm devices
- Equipment safety requirements quote the full text of GB 18399
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