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
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
