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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 41914.2-2022: Fine bubble technology - General principles for usage and measurement of fine bubbles - Part 2: Categorization of the attributes of fine bubbles Status: Valid
Basic dataStandard ID: GB/T 41914.2-2022 (GB/T41914.2-2022)Description (Translated English): Fine bubble technology - General principles for usage and measurement of fine bubbles - Part 2: Categorization of the attributes of fine bubbles Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: A20 Classification of International Standard: 07.030 Word Count Estimation: 14,111 Date of Issue: 2022-12-30 Date of Implementation: 2023-07-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 41914.2-2022: Fine bubble technology - General principles for usage and measurement of fine bubbles - Part 2: Categorization of the attributes of fine bubbles---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 07.030 CCSA20 National Standards of People's Republic of China Microbubble Technology Microbubble Use and Measurement General Rules Part 2.Classification of Microbubble Properties (ISO 20480-2.2018, MOD) Posted on 2022-12-30 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee table of contentsPreface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Basic principle of micro-bubble usage and measurement 1 4.1 Micro-bubble technology standard system 1 4.2 Quality of liquid medium 2 5 Micro-bubble property representation 2 5.1 Application of Particle Size Index and Number Concentration Index 2 5.2 Classification and representation of fine bubble size features 3 6 Classification of microbubble properties according to ascent velocity 4 6.1 Rising speed property of fine bubbles 4 6.2 Classification of micro-bubbles according to rising speed 4 6.2.1 General 4 6.2.2 Regional classification and definition 5 Appendix A (Informative) Observation Example 7 of Quantity Stability of Ultrafine Bubbles in Liquid Reference 9forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document is the second part of GB/T 41914 "General rules for the use and measurement of micro-bubble technology micro-bubble". GB/T 41914 has The following parts have been published. --- Part 1.Terminology; --- Part 2.Classification of fine bubble properties. This document is modified to adopt ISO 20480-2.2018 "General rules for the use and measurement of fine bubbles in fine bubble technology - Part 2.Fine bubbles Classification of Bubble Properties". The technical differences between this document and ISO 20480-2.2018 and their reasons are as follows. --- Replaced ISO 20480-1 (see Chapter 3) with the normatively quoted GB/T 41914.1 to adapt to my country's technical conditions and improve high operability; ---Changed the conditions of some important properties of the liquid medium (see 4.2), in order to be consistent with the relevant standards of our country and improve the operability; --- Added the requirements and instructions for providing test conditions in the use of particle size index [see 5.1.2a)], added the number concentration index provided Requirements for test conditions [see 5.1.4a)], test conditions are an important element of the test. The following editorial changes have been made to this document. --- Delete the note of the term "final ascent speed"; --- Replaced ISO 3696 with the informative GB/T 6682, and replaced CODEX with the informative GB 8357 STAN108; --- 5.1.2a) Added examples of other functional components; --- Some test conditions have been added in A.2 and A.3; --- Change the initial number concentration index at different water temperatures in Figure A.2; --- The average particle size of the initial bubbles at different water temperatures has been added to Figure A.2. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document was proposed by the Chinese Academy of Sciences. This document is under the jurisdiction of the National Standardization Technical Committee on Fine Bubble Technology (SAC/TC584). This document was drafted by. Institute of Process Engineering, Chinese Academy of Sciences, Shanghai Hangyi High-tech Development Research Institute Co., Ltd., Shanghai Jiuer Biotechnology Development Co., Ltd., Ningbo Changjing Environmental Protection Materials Engineering Co., Ltd., Yuchuang Environmental Technology (Jinan) Co., Ltd., Chinese Academy of Sciences Shanghai Advanced Research Institute, Shandong University of Technology, Beijing Zhongnong Tianlu Micro-nano Bubble Water Technology Co., Ltd., Xi'an University of Architecture and Technology, Taizhou Giant Naxin Energy Co., Ltd., Hangzhou Xiyue New Material Technology Co., Ltd. The main drafters of this document. Li Zhaojun, Zhou Lan, Sun Tao, Lu Yongming, Zhu Ronglin, Si Guangzhen, Li Jixiang, Zhang Lijuan, Tao Dongping, Zhang Zhili, Cui Haihang, Xiao Wei, Ding Rong, Chen Chunli.IntroductionIn recent years, with the development of bubble measurement technology, the characterization of microbubbles and ultrafine bubbles has become possible. Using these techniques, it was found that the Fine bubbles remain near steady state for several months. Micro-bubble technology is a new technology, which has been applied in many fields so far. Therefore, for such a diverse technical field Establishing proper terminology is critical to commercial trade and product acceptance by a wide range of microbubble users. To facilitate better communication between users of fine bubbles, this document introduces media (e.g. water) quality standards, as well as particle size indices and number concentration indices. number. This document also provides an explanation for the classification of fine bubbles by size characteristics and ascent velocity. It should be pointed out that the motion behavior of bubbles in the medium can be caused by buoyancy or the random Brownian motion caused by the thermal drive/fluctuation process. Make a decision. Therefore, larger bubbles exhibit buoyancy behavior (float up), while smaller bubbles remain in the liquid medium for random motion. GB/T 41914 "General Rules for the Use and Measurement of Micro-bubble Technology" aims to apply to the general application of micro-bubble technology. The principles and requirements for standardization are proposed to be composed of five parts. --- Part 1.Terminology. The purpose is to define terms and definitions in the field of microbubble technology. --- Part 2.Classification of fine bubble properties. The purpose is to establish the quality of the liquid medium and the generality of the size and concentration of fine bubbles. rules and expressions. --- Part 3.Micro-bubble generation method. The purpose is to describe the microbubble generation method. --- Part 4.Microbubble bed terms. The purpose is to define the bubble bed of dissolved air flotation (DAF) and its role in the dissolved air flotation process. Terms related to properties. --- Part 5.Shelled fine bubbles. The purpose is to establish the concept system of shelled fine bubbles. Microbubble Technology Microbubble Use and Measurement General Rules Part 2.Classification of Microbubble Properties1 ScopeThis document establishes general rules and expressions for the quality of liquid media, the size and concentration of fine bubbles, and the Classification.2 Normative referencesThe contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 41914.1 Micro-bubble technology General rules for the use and measurement of micro-bubbles Part 1.Terminology (GB/T 41914.1- 2022, ISO 20480-1.2017, IDT)3 Terms and DefinitionsThe following terms and definitions defined in GB/T 41914.1 apply to this document. The glossaries used for standardization work maintained by ISO and IEC are as follows. 3.1 Ascent speed risevelocity The speed at which a tiny air bubble moves upward in a liquid. 3.2 terminal rise velocity The velocity at which the buoyancy and viscous forces on the fine bubbles are balanced. 4 Basic principle of micro-bubble usage and measurement 4.1 Micro-bubble technology standard system The purpose of this document is to provide an overall framework and guidelines for those who develop microbubble technical standards, and to facilitate communication among microbubble users. flow. In order to formulate consistent standards, the following three-level standard system has been established. a) The first level (Basic Standards) contains general terms, basic concepts and principles that can be used for the measurement and use of micro-bubble technology. This article Components are an integral part of these base standards and are the basis for the next two levels. b) The second layer (measurement standards) contains various measurement methods used to characterize e.g. bubble diameter, number concentration index, as well as sampling and sample Preparation of general methods, etc. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 41914.2-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 41914.2-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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