【文章內(nèi)容簡介】 tion tanks S2850/S2855 will be transferred into sludge tank V2820 for disposal. Liquid from SBR tank flows into buffer tank V2860. If water from SBR meets discharge standards, it will be discharged into municipal pipe network through discharge pump P2865. If it does not meet discharge standards, it will be lifted by lifting pump P2860 in buffer tank into sand filter F2860 for further disposal. Lifting pump in buffer tank is started and stopped by liquid level transmitter LICA2860V in buffer tank. When liquid in buffer tank reaches high level, lifting pump in it will start automatically and lift the waste in tank into sand filter. And when liquid in the tank reaches low level, lifting pump in the tank will stop automatically. Whether liquid at highhigh level or lowlow level, system will send out alarm automatically.Water from sand filter will be tested by nephelometer TURB2860F. If turbidity not reaches discharge standards, water will flow into adjustment tank S2801 for further disposal while if turbidity reaches standards, water will flow into discharge tank V2865. If water in discharge tank reaches discharge requirements, it will be discharged into municipal pipe network through discharge pump. If not, operator can call for tank car to ship outside. After operating a period of time, sand filter will have larger resistance in its filtering layer so pressure difference between inlet and outlet water in filter will bee larger and larger. If pressure difference reaches at , pressure difference switch PDS2860F will send signal to PLC and system will send out alarm to operator for backwash. Water from backwash will be discharged into ditch. After backwash pleted by hand, the process of filtering will continue. After sludge in sludge tank V2820 is blended and condensed by blender A2820, the upper clear liquid is discharged into ditch and condensed sludge will be transferred to frame type filter press F2830 for dehydration through screw pump P2830. After dehydration, filter cake will be shipped outside while filtered liquid discharged into ditch. Sludge screw pump P2830 is controlled by liquid level switch LSA2820V, stopped at low liquid level, started by hand at high liquid level and alarm sent out at highhigh liquid level. Waste discharged into ditch will be collected into well S2820 and lifted into adjustment tank for further disposal through lifting pump P2802 in collection well. The lifting pump in collection well is controlled by liquid level switch LS2802S, stopped at low liquid level and started at high liquid level.Chapter Four Disposal Structure, Equipment Function and Design Parameters Waste disposal project will involve in coordination of many disposal structures, such as adjustment tank, SBR tank, buffer tank and discharge tank, etc, electromechanical equipment, such as lifting pump, air blower, blender, sand filter, frame type filter press, etc and transfer pipeline and adjustment equipment between structure and equipment to realize various functions and reach the expected requirements. The followings are various disposal structure, electromechanical equipment function and relevant parameters of this project: Main structure and equipment： Adjustment tank（S2801 concrete tank on the ground）Function： Used for waste storage and quality amp。 quantity balancing, installed with jet blender inside.Quantity： 1 unitDimension： 3000X3000X4250mmEffective volume： 30m3Effective stationary period： dayBlending style： Jet blendingRelevant equipment in the tank include： Adjustment tank lifting pump （P2801）Quantity ： 1 setModel： CO500/30KFlow： 7m3/hDelivery lift： 20 mPower： Manufacturer： LOWARA Float ball level meter (LSA2801S)Model： MAC3Quantity： 1 unitManufacturer： Dalian MACApplicable temperature：0℃50℃ Liquid level transmitter (LICA2801S)Model： LU11Quantity： 1 unitManufacturer： FLOWLINEApplicable temperature：40℃70℃ Coagulation tank（R2810A，carbon steel FRP anticorrosion）Function： Offer space for coagulation reaction between coagulant and waste. Quantity： 1 unitDimension： 650X1450X1500mmEffective volume： Effective stationary period： Coagulation tank blender（A2810A，Carbon steel lined with rubber）Function： Make coagulant and waste mix quicklyModel： JB350 X1500Quantity： 1 unitMotor power： Rotation speed： 136r/minLeaf diameter： 350mm 　PH meter (PH2810A)Model： InPro 3200/120/pt1000+2050eQuantity： 1 unitMeasure range： 0~14Manufacturer： METTLERTOLEDO Reaction tank（R2810B，Carbon steel FRP anticorrosion）Function： Offer space for chemical reaction between lime milk and substance in waste and generate deposit hereQuantity： 1 unitDimension： 1300X1450X1500mmEffective volume： Effective stationary period： Reaction tank blender（A2810B，Carbon steel lined with rubber）Function： Make lime milk and waste mix quickly.Model： JB450 X1500Quantity： 1 unitMotor power： Rotation speed： 115r/minLeaf diameter： 450mm 　PH meter (PH2810B)Model： InPro 3200/120/pt1000+2050eQuantity： 1 unitMeasure range： 0~14Manufacturer： METTLERTOLEDO Flocculation tank（R2810C，Carbon steel FRP anticorrosion）Function： Offer space for flocculation reaction between flocculant and waste.Quantity： 1 unitDimension： 650X1450X1500mmEffective volume： Effective stationary time： Flocculation tank blender （A2810C，Carbon steel lined with rubber）Function： Make flocculant and waste mix quicklyModel： JB350 X1500Quantity： 1 unitMotor power： Rotation speed： 136r/minLeaf diameter： 350mm Deposition tank（V2815，Carbon steel epoxy anticorrosion）Function： For liquid and solid separation in wasteQuanti