GB/T 29411-2012 PDF English

GB/T29411-2012 (GBT29411-2012): PDF in English

GB/T 29411-2012 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.180 F 19 Technical specification of hydrogen-oxygen generator with water electrolyte ISSUED ON: DECEMBER 31, 2012 IMPLEMENTED ON: OCTOBER 01, 2013 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of Contents Foreword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 5 4 Classification and designation ... 6 5 Technical requirements ... 6 6 Testing and measuring ... 13 7 Security techniques ... 16 8 Plates and markings ... 17 9 Packaging and transportation ... 18 Appendix A (Normative) Measurement of gas production by volumetric method ... 20 Technical specification of hydrogen-oxygen generator with water electrolyte 1 Scope This Standard specifies the classification and designation, technical requirements, testing and measuring, security techniques, plates and markings, packaging and transportation of hydrogen-oxygen generator with water electrolyte. This Standard applies to hydrogen-oxygen generators with a hydrogen-oxygen mixed gas production of 0.1 m3/h ~ 30 m3/h. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 150.4, Pressure vessels - Part 4: Fabrication, inspection and testing, and acceptance GB/T 2829, Sampling procedures and tables for periodic inspection by attributes (apply to inspection of process stability) GB 3836.5, Explosive atmospheres - Part 5: Equipment protection by pressurized enclosure p GB/T 3985, Compressed asbestos fibre jointing GB/T 4237, Hot rolled stainless steel plate, sheet and strip GB/T 4830, Industrial process measurement and control instruments - Pressure range and quality of air supply GB 4962, Technical safety regulation for gaseous hydrogen use GB/T 8175, Guide for design of thermal insulation of equipment and pipes GB 9448, Safety in welding and cutting GB/T 11352, Carbon steel castings for general engineering purpose GB/T 12332, Metallic coatings - Electroplated coatings of nickel for engineering purposes GB/T 13306, Plate GB 50058, Code for design of electrical installations in explosive atmospheres GB 50177, Design code for hydrogen station GB 50316, Design code for industrial metallic piping 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 hydrogen-oxygen mixed gas A mixed gas of hydrogen and oxygen, with a ratio of 2:1, produced by a hydrogen- oxygen generator with water electrolyte. 3.2 hydrogen-oxygen generator A device for electrolyzing water to produce a hydrogen-oxygen mixed gas, consisting of a water electrolyzer, a power supply, a water and gas separation device, a flame arrester, etc. 3.3 water electrolyzer A device that generates hydrogen-oxygen mixed gas, consisting of electrodes, spacers, and tanks. The water electrolyzer is the main equipment of the hydrogen-oxygen generator, and its performance parameters will determine the technical performance of water electrolysis to produce hydrogen-oxygen mixed gas. 3.4 fire arrester A device used to prevent external flames from entering the equipment and pipes of the hydrogen-oxygen generator or to prevent the spread of flames between equipment and pipes. 5.3.1 The protective cover or enclosure shall be made of non-combustible materials; the minimum thickness shall be greater than 0.6 mm, and stainless-steel plates or carbon steel plates are generally used. For protective covers with larger areas, strengthening measures or double-layer structures shall be adopted according to strength or rigidity requirements. 5.3.2 When the protective cover or enclosure needs to be equipped with an insulating layer, it shall be designed according to GB/T 8175. The insulation material shall be non- combustible materials, and shall be provided with measures to prevent the materials from spreading and scattering. 5.3.3 The inner surface of the protective cover or enclosure shall be flat and free of accumulation space for hydrogen-oxygen mixed gas, and shall be provided with an exhaust port at the highest point on the top. If there are two or more places with the highest point on the top, an exhaust outlet shall be provided at each highest point. 5.3.4 In order to avoid the accumulation of hydrogen-oxygen mixed gas in the protective cover or enclosure, a ventilator should be installed on the top or upper side. When conditions permit, compressed air or nitrogen can be connected. Inspection openings and maintenance openings shall be provided in locations where the protective cover or enclosure is convenient for inspection and maintenance. Their number and size shall be determined according to the inspection and maintenance objects or functions. Inspection openings and maintenance openings shall be equipped with viewing windows or covers. 5.4 Water electrolyzer 5.4.1 The performance parameters and structure of the water electrolyzer shall be based on the basic requirements of reducing electric energy consumption per unit of gas production, reducing manufacturing costs, and extending service life. The structural type of the water electrolyzer, the structure, coating and material of the electrolysis cell and its electrodes and separators shall be reasonably selected. 5.4.2 The ratio of hydrogen and oxygen mixed gas produced by the water electrolyzer shall be 2:1, and the production capacity shall comply with the requirements in Table 1. 5.4.3 The selection of sealing gaskets shall ensure that the water electrolyzer does not leak or corrode when in working condition, and can withstand the changes in the working condition when the tank is opened and stopped. Its quality shall comply with GB/T 3985 or the relevant standards of the material selected for the specific water electrolyzer cell body design. 5.4.4 The steel castings on the electrolyzer shall comply with the requirements of GB/T 11352. 5.4.5 The quality of electroplated parts of the water electrolyzer shall meet the following requirements: a) The cladding surface of the electroplated parts shall not have serious defects such as bubbling, peeling, partial lack of coating and scratches; b) The cladding thickness, bonding strength and void content of the electroplated parts shall comply with the requirements of GB/T 12332; c) The inspection sampling and sampling methods for the cladding thickness, bonding strength and void content of the electroplated parts shall be in accordance with the provisions of GB/T 2829. Electroplated parts can be tested using test pieces electroplated at the same time in the same process. 5.4.6 The preparation, filling and use of cell liquor shall be convenient, safe and reliable to prevent leakage and venting. 5.4.7 The operating temperature limit of the water electrolyzer shall comply with the provisions of Table 1, and an automatic protective device shall be equipped. 5.4.8 The cumulative operating time of electrode end plates and electrode plate manufacturing materials under rated working conditions shall exceed 36 months. 5.5 Water and gas separation device and gas cooling equipment 5.5.1 The water and gas separation device is used for gas-liquid separation, and the gas cooling equipment is used for cooling the hydrogen-oxygen mixed gas and reducing the water content of the gas. Their manufacturing, inspection and acceptance shall comply with the regulations of GB 150.4. 5.5.2 The water and gas separation device and gas cooling equipment should be made of stainless-steel plates and shall comply with the regulations of GB/T 4237. 5.5.3 The layout of the container shall be based on the overall design of the hydrogen- oxygen production system with water electrolysis, and efforts shall be made to comply with the gas production process, keep the connecting pipes short, and facilitate operation and maintenance. 5.5.4 The gas storage volume of the gas-water separation device or gas cooling equipment shall not be greater than 5 L when the rated gas production of the hydrogen- oxygen generator is ≤ 3 m3/h, shall not be greater than 8 L when 3 m3/h < rated gas production ≤ 9 m3/h, and shall not be greater than 15 L when 9 m3/h < rated gas production ≤ 30 m3/h. 5.5.5 The gas cooling equipment shall be equipped with a return pipeline, and the condensed liquid shall automatically return. 5.6 Flame arrester 5.6.1 Flame arresters shall be installed on the hydrogen-oxygen mixed gas outlet pipe of the hydrogen-oxygen generator with water electrolyte and the pipe in front of the gas 5.8.2 The arrangement of pipelines and accessories shall comply with the requirements of the hydrogen-oxygen mixed gas production process, and shall be convenient for operation, installation and maintenance. The length of the hydrogen-oxygen mixed gas delivery pipeline shall not exceed 100 m. 5.8.3 For pipe sections with thermal expansion and contraction, reasonable settings shall be made based on flexible calculation and thermal compensation requirements. 5.8.4 The layout of pipelines and accessories shall be neat and orderly, reducing unnecessary intersections, and paying due attention to aesthetics. 5.8.5 The setting and calculation of pipeline supports shall comply with the relevant provisions of GB 50316. Avoid welding the support to the single equipment. 5.8.6 Insulation measures shall be taken, or not, for the cooling water pipeline according to its operating temperature. When insulation is required, the insulation material shall be non-combustible. The cooling water pipeline shall be equipped with a water cutoff protective device, as we.......
Source: https://www.ChineseStandard.net/PDF.aspx/GBT29411-2012