40-F5061S-H0101(化学)

JINDAL STEEL AND POWER LIMITED DEVELOPMENTBTG for Chhattisgarh4 X 135 MW CPP, Raigarh CHEMICAL WATER TREATMENTDOCUMENTMAIN EQUIPMENTAND MATERIAL SCHEDULEBTG for Chhattisgarh 4X135MW CPP, RaigarhDOCUMENT NO.: PageDOCUMENT CONTROL SHEETPROJECT: BTG for Chhattisgarh 4 X 135 MW CPP, RaigarhCLIENT: JINDAL STEEL AND POWER LIMITED/ SHANGHAIELECTRIC GROUP Co., Ltd.,DOCUMENT TITLE: CHEMICAL WATER TREATMENT PART DECRIPTIONDOCUMENT NO. : 40-F5061S-H0101REV. NO. : 0ENDORSEMENTS0 2009.2REV. NO. DATE DESCRIPTION PREP. BYSIGN.(INITIAL)REVW. BY SIGN.(INITIAL)APPD BY SIGN.(INITIAL)40-F5061S-H0101CONTENT1 GENERAL (1)1.1G ENERAL U NIT (1)1.2D ESIGN S COPE OF C HEMICAL W ATER T REATMENT S ECTION (1)2 TEMPERATURE AND PRESSURE REDUCING SYSTEM OF SWAS (1)2.1F UNCTION AND S COPE (1)2.3S YSTEM D ESIGN D ESCRIPTION (2)2.4D ESIGN AND O PERATING C ONDITIONS(SUGGESTED, NOT IN SEC SUPPLY SCOPE) (2)3 CHEMICAL DOSING SYSTEM (3)3.1S YSTEN D ESIGN D ESCRIPTION (3)4 DRAWING LIST (4)1 General1.1 General UnitFour sets of 135MW units will be built in this phase, the unit main data is as follows：1.1.1 Circulation Fluidizing Bed BoilerSteam flow at maximum continuous rating： 460t/hPressure of superheat steam： 13.74MPa(a)Temperature of superheat steam： 540℃1.1.2 Steam TurbineType：super-high pressure, once reheat, double cylinders and double exhausting, condensing type.Rated power： 135 MWSteam pressure at main stop valve inlet： 13.24 MPa(a)Steam temperature at main stop valve inlet： 535 ℃Main steam flow: 417.943t/h1.1.3 GeneratorRated power： 135 MWRated voltage： 13800 VRated speed： 3000 r/minExcitation type： static excitationPower factor： 0.85Type of cooling： air cooling1.2 Design Scope of Chemical Water Treatment SectionChemical water treatment system that includes the following subsystem:•. Temperature and pressure reducing system of SWAS•. Chemical dosing system2 Temperature and Pressure Reducing System of SWAS2.1 Function and ScopeSWAS to monitor the chemistry of the water and steam cycles of the steam, feedwater, condensate, boiler water and associated equipment in order to control the chemical additives to the water cycles to ensure correct water and steam quality.In according to contract, provision for sample collection shall be provided and samples for analysers to be conditioned by SEC with the help of primary coolers. Further the sample lines to be connected upto the bulk head of SWAS (Owner supply) located in the main plant.SEC's scope includes supply and installation of primary coolers, impulse pipe etc upto the bulk head of water sample table.After receiving sample at bulk head, sample will be conditioned by SWAS and all water and steam analysers shall be in Owner's scope.2.3 System Design Description5.2.2 Sampling and Analysis RackTemperature and pressure reducing system is composed of the component parts of sampling, adjustment. Temperature and pressure reducing rack is consists of coolers, pressure reducing devices, needle valves, shut off valves, pressure indicators, flow indicators, thermometers, monitor protection device, piping, tubing and accessories.The cooling water comes from the closed cooling water system of the main plant.2.4 Design and Operating Conditions(suggested, not in SEC supply scope)2.4.1 Sampling Locations and AnalyserSampling point Analysis instrument Num.outlet Dissolved oxygen11 CondensatepumpCation conductivity 1pH 1Grab 1outlet Dissolved oxygen 12 DeaeratorGrab 13 Economizer inlet pH 1Conductivity 1Grab 1water Conductivity 14 BoilerpH 13-1PO4Grab 2 steam Cation conductivity 15 SaturatedGrab 26 Superheated steam outlet PNa 1Grab 2 7Reheated steam Conductivity 1Grab 1water Conductivity 18 ClosedcoolingpH 1Grab 19High pressure heater drainage Grab 110 Low pressure heater drainage Grab 111 Boiler continuous blowndown Grab 112 Boiler periodic blowndown Grab 12.4.2 Requirements of the Environmental TemperatureEnvironmental temperature for temperature and pressure reducing rack: 5~40°C Environmental temperature for instrument panel: 10~35°C Cooling water temperature inlet ≤40°C Cooling water pressure ≥0.2MPa 3 Chemical Dosing System3.1 Systen Design DescriptionThe chemical dosing system supply water conditioning chemicals to the feed water and boiler systems to minimize corrosion and prevent scale formation.Chemical dosing systems include the sub-system:Oxygen scavenger (hydrazine) dosing systemspH adjustment (ammonia) dosing systemsPhosphate/ boiler water dosing systemsOne common chemical dosing system shall be provided for each two units.3.1.1 Hydrazine Dosing SystemHydrazine is pumped into the hydrazine dilution tank and compounded 0.5% concentration hydrazine solution. The hydrazine solution is pumped into the feedwater of units. Hydrazine solution dosing shall be automatically controlled pro rata to boiler feedwater flow. The hydrazinewill be injected to the deaerator outlet.There are three pumps, two running and one stand-by. Q=40l/h P=2.48MPaThere are two tanks with agitators, the volume of each tank is 1.5m3.3.1.2 Ammonia Dosing SystemThe Ammonia is pumped into the ammonia dilution tank and compounded 1%~5% concentrate solution, the Ammonia solution is pumped into the Feedwater of units. The dosing shall be automatically controlled by pH instrumentation to maintain the feedwater / condensate within the specified pH range. The feed point will be deaearator outlet.There are three pumps, two running and one stand-by. Q=40l/h P=2.48MPaThere are two tanks with agitators, the volume of each tank is 1.5m3.3.1.3 Phosphate Dosing SystemThe phosphate is put into the phosphate dilution tank and compounded 1%～5% phosphate solution, the phosphate solution is pumped into the boiler drum.There are three pumps, two running and one stand-by. Q=35l/h P=25MPaThere are two tanks with agitators. The volume of each tank is 1.5m3.4 Drawing List No.VOLUME No.NAME OF VOLUME1 F5061S-H0101 CHEMICAL WATER TREATMENT PART DECRIPTION 2F5061S-H0102LIST OF EQUIPMENTS AND MATERIAL3 F5061S-H0201SYSTEM DIAGRAM AND ARRANGMENT OF TEMPERATURE AND PRESSURE REDUCING IN SWAS 4 F5061S-H0301SYSTEM DIAGRAM AND ARRANGMENT OF CHEMICAL DOSING5。