Detail of GB 28931-2024

Introduction of GB 28931-2024

Hygienic requirements for chlorine dioxide disinfectant generator 1 Scope This document specifies the raw material requirements, technical requirements, disinfection scope, disinfection methods, inspection rules, transportation and storage, nameplates and user manuals, and precautions for chemical chlorine dioxide disinfectant generators. This document is applicable to generators that produce chlorine dioxide disinfectants by chemical reaction. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 317 White granulated sugar GB/T 320 Synthetic hydrochloric acid for industrial use GB/T 534 Sulphuric acid for industrial use GB/T 1616 Hydrogen peroxide for industrial use GB/T 1618 Sodium chlorate for industrial use GB/T 2440 Urea GB/T 3624 Titanium and titanium alloy seamless tubes GB 5083 General rules for designing the production facilities in accordance with safety and health requirements GB/T 5462 Industrial salt GB 5749 Standards for drinking water quality GB/T 10002.1 Unplasticized poly (vinyl chloride) (PVC-U) pipes for water supply GB 14930.2 National food safety standard - Disinfectant GB/T 22789.1 Plastics-Unplasticized poly (vinyl chloride) sheets - Part 1: Types, dimensions and characteristics for sheets of thickness not less than 1 mm GB 25025 Specification of glass-lined equipment for industry GB/T 25295 General guide for designing of electrical equipment to satisfy safety requirements GB/T 26366 Hygienic requirements for chlorine dioxide disinfectant GB 27948 General requirements for air disinfectant GB 27949 General requirements of disinfectant of medical instruments GB 27952 General requirements for ordinary objects surface disinfectant GB 27953 General requirements on disinfectant for infectious focus GB 30689 Hygienic requirements for washer-disinfectors employing chemical disinfection for thermolabile endoscopes GB 38598 General requirement for label and instruction book of disinfection products HG/T 3250 Sodium chlorite for industrial use HG/T 4516 Sodium bisulfate for industrial use HG 20536 Polytetrafluoroethylene lining equipment JB/T 2932 Specification for water treatment equipments WS/T 10009 Test methods of disinfection products Standard for hygiene and safety evaluation of disinfectants and disinfection facilities for drinking water (trial) (WEIJIANDUFA [2005] No.336) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 chlorine dioxide concentration mass of chlorine dioxide contained per unit volume in the solution at the outlet of the generator Note: In mg/L. 3.2 output of chlorine dioxide mass of chlorine dioxide produced by the chlorine dioxide generator per unit time under the rated working state Note: In g/h or kg/h. 3.3 purity of chlorine dioxide percentage of the concentration of chlorine dioxide in the outlet solution to the sum of the concentrations of all oxychloride substances under the rated working condition of the generator. If the outlet of the generator is gas, the purity is determined and calculated by the solution after absorption of pure water Note 1: The calculation equation is as follows: Note 2: The total concentration of all chlorine oxidizing substances refers to the sum of the concentrations of ClO2, Cl2, ClO2- and ClO3- measured by the five-step iodometry, mg/L. 3.4 the percent yield of chlorine dioxide percentage of chlorine dioxide production measured within a certain period of time to the theoretical value calculated using the main reaction equation 3.5 chlorine dioxide disinfectant generator equipment that uses reaction raw materials to undergo chemical reactions to produce chlorine dioxide as the main product and is used for disinfection Note: Where this equipment can directly disinfect air and medical equipment, it is also called chlorine dioxide disinfecting machine. 3.6 pure chlorine dioxide disinfectant generator chlorine dioxide disinfectant generator with chlorine dioxide purity greater than or equal to 90% 3.7 mixed disinfectant generator of chlorine dioxide and chlorine generating device using sodium chlorate and hydrochloric acid as main raw materials to generate mixed disinfectants such as chlorine dioxide and chlorine gas through chemical reaction 4 Raw material requirements 4.1 Chemical raw materials with corresponding specifications and purity shall be selected according to the reaction principle, purity and use of the final product. 4.2 The raw materials used shall comply with the hygienic and safety requirements of GB/T 26366 and corresponding national standards and relevant regulations. Hydrochloric acid shall comply with the requirements of GB/T 320, sulfuric acid shall comply with the requirements of GB/T 534, sodium chlorate shall comply with the requirements of GB/T 1618, sodium chlorite shall comply with the requirements of HG/T 3250, hydrogen peroxide shall comply with the requirements of GB/T 1616, urea shall comply with the requirements of GB/T 2440, white granulated sugar shall comply with the requirements of GB/T 317, sodium chloride shall comply with the requirements of GB/T 5462 and sodium bisulfate for industrial use shall comply with the requirements of HG/T 4516.

Contents of GB 28931-2024

Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Raw material requirements 5 Technical requirements 6 Disinfection scope 7 Disinfection method 8 Inspection rules 9 Transportation and storage 10 Nameplate and operation instructions 11 Precautions 12 Standard implementation Annex A (Informative) Recommended disinfection method for chlorine dioxide disinfection Annex B (Normative) Method for determination of chlorine dioxide content Bibliography