GB 51093-2015 English PDFUS$1789.00 · In stock
Delivery: <= 13 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 51093-2015: Technical code for hydrochloric acid regeneration engineering according to spraying and roasting technology of iron and steel enterprises Status: Valid
Basic dataStandard ID: GB 51093-2015 (GB51093-2015)Description (Translated English): Technical code for hydrochloric acid regeneration engineering according to spraying and roasting technology of iron and steel enterprises Sector / Industry: National Standard Classification of Chinese Standard: P73 Classification of International Standard: 77.01 Word Count Estimation: 85,840 Date of Issue: 2015-03-08 Date of Implementation: 2015-11-01 Quoted Standard: GB 50009; GB 50011; GB 50015; GB 50016; GB 50019; GB 50028; GB 50034; GB 50046; GB 50054; GB 50057; GB 50058; GB 50093; GB 50116; GB 50126; GB 50140; GB 50168; GB 50184; GB 50204; GB 50205; GB 50211; GB 50212; GB 50217; GB 50224; GB 50235; GB 50236; GB 50254; GB 50275; GB 50311 Regulation (derived from): Ministry of Housing and Urban-Rural Development Announcement No.777 Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Summary: This standard is applicable to the construction, operation and maintenance management of the new and reconstructed hydrochloric acid waste liquid recycle project of spray roasting method. GB 51093-2015: Technical code for hydrochloric acid regeneration engineering according to spraying and roasting technology of iron and steel enterprises---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. 1 General 1.0.1 In order to improve the technical level of the hydrochloric acid waste liquid regeneration project of the spray roasting method in iron and steel enterprises, ensure the project quality, achieve advanced technology, reasonable economy and environmental protection, this specification is formulated. 1.0.2 This specification is applicable to the construction, operation and maintenance management of newly-built and reconstructed spray-roasting hydrochloric acid waste liquid regeneration projects in iron and steel enterprises. 1.0.3 The construction of the hydrochloric acid waste liquid regeneration project of the spray roasting method in iron and steel enterprises shall not only comply with this specification, but also comply with the current relevant national standards. 2 terms 2.0.1 Hydrochloric acid regeneration process The hydrochloric acid waste liquid produced by the pickling unit is treated, and a series of chemical reactions are performed to generate regenerated acid that can be used again in the pickling unit. 2.0.2 Spraying and roasting technology The waste hydrochloric acid is sprayed into the roasting furnace in the form of mist, and the chemical reaction is carried out in a high-temperature environment to generate regeneration acid and iron oxide powder. 2.0.3 tank farm Area for setting up liquid storage tanks for fresh acid, spent acid, regenerated acid, rinse water, etc. 2.0.4 waste acid The waste hydrochloric acid produced by the pickling unit. 2.0.5 Regenerated acid regenerated acid The hydrochloric acid produced by the hydrochloric acid regeneration unit can be used again for the pickling unit. 2.0.6 fresh acid Purchased commodity hydrochloric acid. 2.0.7 rinse water rinse water The discharge water after cleaning the strip in the rinsing process section of the pickling unit. 2.0.8 ferric oxide Powdered iron oxide produced by spray roasting. 2.0.9 concentrated acid After heat exchange in the pre-concentrator, the concentrated waste acid is circulated. 2.0.10 roaster roaster In a high-temperature environment, the sprayed concentrated acid is vaporized and chemically reacted to generate hydrogen chloride gas and iron oxide powder. 2.0.11 acid gun spray boom A device that sprays concentrated acid in mist form from the top of the roaster. 2.0.12 Cyclone separator It is installed between the roasting furnace and the pre-concentrator to separate the iron oxide powder in the flue gas. 2.0.13 Preconcentrator preconcentrator It is used to cool down and remove dust from the flue gas of the roaster, and to concentrate the waste acid. 2.0.14 Absorption column Equipment that absorbs hydrogen chloride in flue gas to generate regenerative acid. 2.0.15 Scrubber Equipment for removing hydrogen chloride and iron oxide powder remaining in the flue gas by washing. 2.0.16 chlorine remover Equipment for reducing the chlorine content in iron oxide powder by heating. 2.0.17 acid operation mode After the waste acid passes through the pre-concentrator, it is sprayed into the production mode of the roaster. 2.0.18 rinse water operation mode rinse water operation mode After the rinse water passes through the pre-concentrator, it is sprayed into the production method of the roaster. 2.0.19 Demineralized water operation mode A production method in which desalinated water is sprayed directly into the roaster. 3 Basic Regulations3.0.1 The hydrochloric acid waste liquid regeneration project of the spray roasting method in iron and steel enterprises should be constructed simultaneously with the pickling unit. 3.0.2 The hydrochloric acid waste liquid regeneration engineering design shall adopt advanced, mature and reliable technology, process and equipment, and shall comply with the following regulations. 1 The design capacity should match the processing capacity of the pickling unit it serves; 2 The equipment level of process equipment and automatic control system should meet the requirements of production process; 3 Exhaust gas emission indicators should comply with the relevant provisions of the current national standard "Emission Standard of Air Pollutants for Steel Rolling Industry" GB 28665; 4 The quality of iron oxide powder should comply with the relevant provisions of the current national standard "Iron Oxide for Ferrite" GB/T 24244; 5 Neoacid should meet the relevant provisions of the current national standard "Industrial Synthetic Hydrochloric Acid" GB 320. 3.0.3 The hydrochloric acid regeneration device should be arranged in the station building. 3.0.4 The installation of the waste acid purification device in the hydrochloric acid regeneration project should be determined after technical and economic comparison according to the content of impurities such as silicon in the waste acid and the quality requirements of iron oxide powder. 3.0.5 The selection of equipment and materials in the hydrochloric acid regeneration station shall meet the working conditions and environmental requirements.4 process design4.1 Process parameters 4.1.1 The design annual working time of the hydrochloric acid regeneration unit should not be less than 6200h. 4.1.2 The material storage capacity in the hydrochloric acid regeneration station shall meet the requirements for continuous operation of the pickling unit and hydrochloric acid regeneration unit, and the storage time shall comply with the provisions in Table 4.1.2. Table 4.1.2 Storage time of materials 4.1.3 The main components of the waste acid treated by the hydrochloric acid regeneration unit should meet the requirements in Table 4.1.3. Table 4.1.3 Main components of spent acid 4.1.4 The processing capacity of the hydrochloric acid regeneration unit can be calculated according to the following formula. In the formula. Qarp——processing capacity of hydrochloric acid regeneration unit (L/h); Qpl——the processing capacity of the pickling unit (kg/a); St - iron loss of pickling unit, 0.35% to 0.45%; T——The annual working time of the hydrochloric acid regeneration unit (h); CWA—concentration of iron ions in the waste acid discharged from the pickling unit (g/L); CRW—concentration of iron ions in the rinsing water discharged from the pickling unit (g/L). 4.1.5 The design index of the hydrochloric acid regeneration unit should meet the following requirements. 1 Chloride ion (Cl-) recovery rate should be greater than or equal to 99%; 2 The circulating flow rate of the circulating pump of the pre-concentrator should be 8 to 10 times the processing capacity of the unit; 3 The circulating flow rate of the scrubber circulating pump should be 8 to 10 times the processing capacity of the unit. 4.1.6 When the hydrochloric acid regeneration unit is in operation, the following control indicators should be met. 1 The pressure at the top of the roasting furnace should be -0.15kPa ~ -0.45kPa; 2 The temperature at the top of the roasting furnace should be controlled at 385°C to 430°C; 3 The flue gas temperature at the outlet of the pre-concentrator should be less than 100°C. 4.2 Process configuration 4.2.1 The main equipment of the hydrochloric acid regeneration unit should include. roaster, pre-concentrator, absorption tower, scrubber, exhaust fan, droplet separator, iron oxide powder filter, acid storage tank, acid pump group, combustion system, oxidation Iron powder transportation and storage facilities. 4.2.2 The number of spent acid storage tanks and regenerated acid storage tanks should not be less than 2. 4.2.3 Filter settings should meet the following requirements. 1 The waste acid and rinsing water should be equipped with independent working filters before entering the pre-concentrator, and the spare filters can be shared, and the filtration accuracy should be less than or equal to 1mm; 2 The circulating pipeline of the pre-concentrator should be equipped with a filter; 3 A concentrated waste acid filter should be installed before the waste acid enters the acid gun. 4.2.4 When the chlorine ion (Cl-) content in the iron oxide powder is required to be less than or equal to 0.1%, a chlorine removal device should be installed. 4.2.5 Crusher and rotary valve should be installed at the bottom of the roaster. A high-temperature quick cut-off valve should be installed on the high-temperature flue gas outlet pipe of the roaster, and the closing time of the valve should be less than or equal to 8s. 4.2.6 The number of main burners and acid lances of the hydrochloric acid regeneration unit can be selected according to Table 4.2.6.Each main burner should be equipped with independent automatic controller and flame detection device. Table 4.2.6 Number of main burners and number of acid guns 4.2.7 A quick cut-off valve should be installed on the gas main pipe, and the closing time of the valve should be less than 1s, with zero leakage. The number of quick cut-off valves on the main pipe should not be less than 2. 4.2.8 The feed pump of the roaster, the feed pump of the absorption tower, and the exhaust gas conveying fan should have the function of speed regulation. 4.2.9 Each set of acid regeneration unit should be equipped with independent iron oxide powder transportation and storage facilities. The type of iron oxide powder filter can be bag type or plate type. 4.2.10 Fixed dangerous gas leakage detection and alarm devices must be installed in the hydrochloric acid regeneration station. 4.2.11 The acid storage tank area, acid pump area and furnace top area must be equipped with safety spraying devices. 4.2.12 The following process parameters should be tested and have automatic interlocking function. 1 Roasting furnace top temperature and flue gas pressure, middle temperature; 2 Flue gas temperature at the outlet of the pre-concentrator; 3 Flue gas temperature at the outlet of the absorption tower. 4.2.13 The hydrochloric acid regeneration device shall switch between the following modes manually and automatically. 1 acid operation mode; 2 rinse water operation mode; 3 Desalinated operating mode. 4.2.14 The motor protection level of the hydrochloric acid regeneration device shall meet the following requirements. 1 The motor protection level of various fans and acid pumps should not be lower than IP54; 2 The motor protection level of various rotary valves should not be lower than IP63; 3 The protection level of all instruments and actuators should not be lower than IP65. 4.3 Process layout 4.3.1 The process layout of the hydrochloric acid regeneration unit should be safe and convenient for operation, maintenance and management. 4.3.2 The storage tank area shall be equipped with sump pits and automatic drainage facilities, as well as measures for collecting, storing and removing accumulated liquid. The liquid storage volume shall not be less than the volume of the largest storage tank. 4.3.3 The layout of station equipment shall meet the following requirements. 1 The equipment with operating noise greater than or equal to 80dB(A) should be arranged in a separate room; 2 All kinds of pump sets should be arranged in a centralized manner according to the situation; 3 The iron oxide powder packaging machine should be set up in a separate area; 4 The installation surfaces of pre-concentrators, absorption towers, scrubbers and other equipment, the roof platform of roasting furnaces, safety spraying devices and other areas should be equipped with floor drains and water retaining devices; 5 Each floor of the station building should be equipped with maintenance power supply. 4.3.4 The pipeline layout in the station building shall meet the following requirements. 1 Pipelines should be laid along walls, columns, pipe trenches, and pipe galleries, without hindering traffic, opening doors and windows, lighting, and easy maintenance; 2 The suction pipes of various acid pumps should be equipped with emptying pipes; 3 All kinds of overflow pipes should be equipped with water seal and ventilation facilities; 4 Storage tanks should be provided with air intake and exhaust facilities; 5 The pipeline layout should follow. the non-corrosive medium pipeline is above the corrosive medium pipeline, the gas pipeline is above the liquid pipeline, the metal pipeline is above the non-metal pipeline, and the insulation pipeline is above the non-heat insulation pipeline.5 Process equipment and pipelines5.1 General provisions 5.1.1 The equipment and materials of the hydrochloric acid regeneration unit shall be reliable, practical and durable, and shall meet the following requirements. 1 The lining acid-resistant bricks shall comply with the relevant provisions of the current national standard "Acid-resistant bricks" GB/T 8488; 2 Rubber-lined equipment shall comply with the relevant provisions of the current national standard "Rubber Lining" GB 18241.1, "Rubber Lining Chemical Equipment" HG/T 20677 and "Technical Regulations for Lining Steel Shell Design" HG/T 20678; 3 FRP equipment shall comply with the relevant provisions of the current industry standard "FRP Chemical Equipment Design" HG/T 20696; 4 PPH equipment should comply with the relevant provisions of the current national standard "Static Atmospheric Pressure Welded Thermoplastic Storage Tank (Tank)" GB/T 25197 and "Plastic Equipment" HG 20640; 5 Titanium alloy equipment should comply with the relevant provisions of the current national standard "Titanium and Titanium Alloy Grades and Chemical Composition" GB/T 3620.1 and "Titanium and Titanium Alloy Processed Products Chemical Composition Permissible Deviation" GB/T 3620.2; 6 Niobium materials and their processing shall comply with the relevant provisions of the current industry standard "Niobium and Niobium Alloy Processed Product Designation and Chemical Composition" YS/T 656. 5.1.2 Derusting and anticorrosion of steel structure equipment shall meet the following requirements. 1 The derusting of steel structure equipment before painting shall comply with the relevant provisions of the current national standard GB 8923 "Steel Surface Corrosion Grade and Rust Removal Grade Before Painting"; 2 The coating of steel structure equipment shall comply with the relevant provisions of the current industry standard "Technical Regulations for Coating of Steel Structures and Pipelines" YB/T 9256; 3 Anti-acid paint should be used for external corrosion protection of steel structure equipment; 4 The external anti-corrosion of high-temperature steel structure equipment should be based on the highest design temperature of the surface, and the high-temperature-resistant paint of the corresponding temperature-resistant grade should be used. 5.1.3 The insulation of equipment and pipelines shall comply with the relevant provisions of the current national standard "Code for Construction of Industrial Equipment and Pipeline Thermal Insulation Engineering" GB 50126. 5.2 Equipment 5.2.1 The acid storage tank equipment shall meet the following requirements. 1 The acid storage tank should be made of carbon steel rubber lining or glass fiber reinforced plastic; 2 The carbon steel rubber-lined acid storage tank should be lined with heated vulcanized rubber, and the rubber sheet should be two layers, and the thickness of each layer should not be less than 3mm; 3 Carbon steel rubber-lined waste acid tanks and regenerated acid tanks should be built with acid-resistant bricks on the inner bottom and side walls of the storage tanks, and the thickness of the layers should not be less than 65mm; 4 The thickness of the anti-corrosion and anti-seepage inner layer of the FRP storage tank shall be greater than or equal to 4mm. 5.2.2 The material of the furnace shell of the roaster should be carbon steel, and the lining material should meet the following requirements. 1.The body and waist of the roasting furnace should adopt "series 1" acid-resistant refractory bricks, and the lower cone should adopt "series 2" acid-resistant refractory bricks; 2 The properties of acid-resistant refractory bricks, acid-resistant fireclay and lightweight castables shall meet the requirements in Table 5.2.2-1~5.2.2-3. Table 5.2.2-1 Performance indicators of acid-resistant refractory bricks Table 5.2.2-2 Performance Index of Acid Resistant Cement Table 5.2.2-3 Performance indicators of lightweight castables 3 Corundum ramming material, high-alumina lightweight heat-insulating bricks and clay light-weight heat-insulating bricks should be used for the combustion chamber, and the material properties should meet the requirements in Table 5.2.2-4~5.2.2-6. Table 5.2.2-4 Performance index of corundum ramming material Table 5.2.2-5 Performance Index of High Alumina Lightweight Insulation Bricks Table 5.2.2-6 Performance Index of Clay Lightweight Insulation Bricks 4 Acid-resistant castables should be used in the discharge port area of the furnace bottom, the connection between the burner and the furnace body, the connection between the double cyclone iron powder return pipe and the furnace body, and around the inspection door of the roaster. Material properties shall meet the requirements in Table 5.2.2-7. Table 5.2.2-7 Performance indicators of acid-resistant castables 5.2.3 The pre-concentrator equipment should meet the following requirements. 1 The shell of the pre-concentrator should be made of carbon steel rubber-lined material, the parts above the throat should be lined with acid-resistant and heat-resistant bricks made of water glass cement, and the parts below the throat should be lined with furan cement-lined acid-resistant bricks; 2 The material of the pre-concentrator nozzle should be niobium or titanium alloy; 3 The material at the throat of the pre-concentrator should have the characteristics of high temperature resistance, acid resistance and severe erosion resistance. 5.2.4 Absorption towers, scrubbers, droplet separators, chimney equipment and packing shall meet the following requirements. 1 The absorption tower can be made of steel-lined rubber, glass fiber reinforced plastic, PPH (modified polypropylene) and other materials; 2 Droplet separators, scrubbers, and chimney equipment can be made of glass fiber reinforced plastics and PPH; 3 The packing in the absorption tower and scrubber should be structured packing and Pall ring packing, and its material should be PPH, PVDF (polyvinylidene fluoride). 5.2.5 The exhaust fan shall meet the following requirements. 1 The shell should be made of carbon steel rubber lining, titanium alloy and other materials; 2 The impeller should be made of titanium alloy, and the impeller flushing device should be installed; 3 Vibration detection and shaft temperature detection devices should be installed. 5.2.6 The iron oxide powder filter shall meet the following requirements. 1 The temperature resistance of filter parts should not be lower than 105°C; 2 The internal structural parts shall be made of materials resistant to hydrogen chloride corrosion. 5.2.7 Acid-resistant pumps shall meet the following requirements. 1.PVDF, FRP, silicon carbide and other materials should be used for the circulating pump of the pre-concentrator and the flow-through parts of the feed pump of the roaster; 2 The mechanical seals of the circulating pump of the pre-concentrator and the feeding pump of the roaster should be equipped with flushing water. 5.2.8 Acid guns and nozzles shall meet the following requirements. 1 The ac......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 51093-2015_English be delivered?Answer: Upon your order, we will start to translate GB 51093-2015_English as soon as possible, and keep you informed of the progress. 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