英译汉英文材料.docx

1、英译汉英文材料160t Converter of JSPL Steel and Iron Company in India1. Gas cleaning, ventilating and air-conditioning1.1 OutlineThe main process equipments of steel-making system are two converter of 160t, two ladle of 160t, two rail tank desulphurization stations, one furnace of 160tVD, and corresponding

2、auxiliary facilities of public.The design set the corresponding gas cleaning and ventilation, air-conditioning facilities, according to the process requirement. In order to meet the technological requirements of production and human health, prevent environment pollution. Gas cleaning and ventilation

3、, air-conditioning facilities mainly comprise:(1) Initial gas purifies and gas recovery system of converter(2) Second state gas purify of converter(3) Flue Gas Cleaning System of hot metal folding tank；(4) Gas cleaning system in desulphurization stations(5) Gas cleaning system in refining furnace (i

4、ncl. flux and ferroalloy loading dust cleaning system)(6) Ventilating and air-conditioning in public facilities.1.2 First de-dusting and gas recovery system of converterIn first de-dusting and gas recovery system of converter, we design two programs, girth wet dust cleaning system and LT dry electri

5、city dust cleaning system. Volume gas recovery 90m3(standard condition)1) The technical data of the converter(1) Nominal capacity 160t(2) The average refining cycle converter 45 min once(3) Maximum rate of carbon reduction 0.48%/min(4) Carbon content in molten iron 4.0-4.2% (5) Carbon content in mol

6、ten steel 0.04-0.1%(6) Temperature of furnace gas 1500(7) The original volume of furnace gas 97440m3/h(standard condition) (8) Concentration of dust 120g/ m3(standard condition)2) Process of dust cleaning system (wet dust cleaning program)The temperature of initial waste gas will go down to 900 afte

7、r passing through cooling flue. Gas goes into the spray scrubber through the swirling water seal, After going through the spray scrubber, dust over 5 microns in the gas will attach to the basic water spray, Under the action of gravity, integrated washing dust water settles at lowest place in the bot

8、tom of the tower and reaches circulating water treatment station through a water seal device, the pipeline and turbid water tank Through the spray scrubber, the temperature of gas will decrease from 900 to saturation temperature 75, efficiency of dust collection reach 97%. The saturate gas will ente

9、r annular gap scrubber through connecting pipe.The annual tap scrubber provides adjustable girth throat, the micro-pressure difference inside and outside the mouth can translate in the electric signal by the differential pressure transmitter. Led by adjusting the hydraulic actuator unit action, driv

10、e within the venturi tube up and down movement within the cone, the temperature of waste gas in annual tap decrease 7, and the outlet temperature is 68. The annual tap scrubber is dual throat, and work flow rate stabilized at 80-100m / s. the minimum design velocity is 60m/s, while the maximum desig

11、n flow rate is 120m/s, diameter of droplets is between twenty-five and seventy microns, dust removal efficiency can reach 98 99.9%.After treatment, concentration of flue gas emission will be 50mg/m3 (standard conditions).After air with water droplets enters the 90o bend evaporator, due to the subjec

12、t of inertia and centrifugal effect, Water droplets left behind to the vane of evaporator and wall of the device and shed along the wall, at the lowest point through the pipeline, water seal device and drainage trap ,the droplets reach the circulating water tank station. In order to achieve better d

13、ewatering effect, behind the 90o bend evaporator the re-establishment of a cyclone evaporator is installed to further separated droplets from the flue gas. Water droplets under the action of centrifugal force is separated and collected in the inner wall of the container. After collecting the water a

14、t the bottom of the lowest point in the cone, it will reach circulating water tank station through pipeline, water seal and drainage trap. Fan of waste gas cleaning system is double support, double inlet, single outlet turbine gas blowers with automatic spray cleaning impeller wash system.The air fl

15、ow of the fan is 210000 m3/h, the pressure is between 23000Pa and 26000Pa.The equipped motor adopt frequency control to achieve energy saving.After the fan, we equipped a coal gas converter station, a emergency relief valve, a water seal check valve and a V-shaped water seal.In the system Micro-elem

16、ents oxygen and CO continuous automatic analyzers are provided and chain with switching station, in order that coal gas recovery and elution convert automatically. When the gas recovery condition meets, convert the valve to recovery state, at that time the converter gas transports to gas tank throug

17、h the water seal check valve; when the condition is not satisfied, convert the valve to elution state, the converter gas exhausts by the sixty meters high chimney, while the ignition of the coke oven gas electromagnetic valve opens, the ignition device ignite oven gas burner automatically, so the co

18、al gas drain from the chimney get burned. Two minutes later, the ignition of the coke oven gas electromagnetic valve closes automatically. When the switching station convert to recovery state again, the steam automatic purge device in the bottom of bleeding chimney startup, and shut down automatical

19、ly after a purge of about two minutes.Upstream of gas switching station, a bypass valve is installed. If the switching station failures, the bypass valve opens, converter gas will diffuse through bleeding chimney. The system equipped with online temperature, pressure, vibration testing and control s

20、ystems, controlled by PLC, which has man-machine interface.The main equipments（each converter set up a gas purification system, each set of system shows as follows）:(1) Spray scrubber one set(2) Annual tap scrubber one set(3) 90o bend evaporator one set(4) Cyclone evaporator one set(5) Coal gas evap

21、orator one set(6) Water seal check valve one set(7)V-shape water valve one set(8) Gas blower one set(9) Riot Frequency conversion motor one set(10) Overflow water sealing holder three sets(11) Maintenance crane of 20t one set3).Process of de-dusting system (dry de-dusting program)For first gas purif

22、ication and recovery system, each converter sets up one set (the following description is written for one set). Converter gas purification and gas recovery system uses the LT dry program for cleaning and recycling. The furnace gas mix with a small amount of air at hood mouth, burning coefficient = 1

23、0%, after cooled by the cooling flue, it comes into the purification and recovery system. The LT dry program device mainly comprises gas cooling system, gas purifying and ash conveying system, Safety control system and other ancillary equipment. The purification equipment mainly consists of four ele

24、ctric field round ESP, flue gas dust content after purification was less than 15mg/m3(standard conditions).The main function for equipments of first gas purification and recovery system is showed as follows (each converter sets up a gas purification and recovery system, the following description is

25、written for one set):(1) Evaporative coolerEvaporative cooler is direct cooling gas equipment, which a double nozzle medium spray is set at the top of the cooler for fine spray of water; the amount of water is adjusted according to the hot air exhaust enthalpy. After the procedure, temperature of wa

26、ste gas will go down to 180, and dust concentration of waste gas decreases about 40% (2) Dry electrostatic precipitatorAfter cooled by evaporator cooler, the converter waste gas enters dry electrostatic precipitator. In order that the dry electrostatic precipitator has better explosion-proof ability

27、 and aerodynamic characteristics, its shell is designed to cylindrical, in the case of converter gas explosion, in order to ensure safety of equipment, there are four scalable explosion venting and automatic reset of the safety valve in the electrostatic precipitator inlet and outlet of the cone par

28、ts. Four dry electrostatic precipitators ensure that gas dust concentration can be less than 20mg/m3 (standard condition) after treating by dry electrostatic precipitator with four fields.Process Design of the Electric Dust Catcher of Converter Gas System The dust content in the converter gas coming

29、 out of gas holder will be as high as l00mg/m3, which can not used in the steel making and rolling system. In order to meet the requirement of consumers, purification will be designed for converter gas to reduce the dust content to l0mg/m3 or below.The maximum delivery flow of the converter gas reco

30、very system is 43000m3/h, so two 60000 m3/h plate-type electric dust catchers will be designed. The electric dust catchers will be located between gas holder outlet and booster, i.e. the converter gas coming out of gas holder will be sent to electric dust catchers through1620x8. Before entering elec

31、tric dust catchers, the converter gas should pass DN1600 butterfly valve and goggle valve. Converter gas purified in the electric dust catchers will go through goggle valve and electric butterfly valve before entering boosting system. Control of the electric dust catchers will be realized through co

32、mputers installed in control room. In order to clean electric dust catchers, continuous and intermittent water spray system will be designed for the electric dust catchers.In order to achieve automatic control of the electric dust catchers, automatic process detection system will be provided to provide such control functions as spark frequency tracking, peak valve tracking, intermittent discharge and etc., so as to adjust production process intermittently, hence to optimize the working condition of equipment. In order to assure safe operation of ele