Presentation is loading. Please wait.

Presentation is loading. Please wait.

WATER TREATMENT PLANTS PROCESS DESCRIPTION. 2 Water Treatment Plants PROCESS DESCRIPTION 1.Water line 2.Mud line 3.Criteria of use for Power Electronics.

Similar presentations


Presentation on theme: "WATER TREATMENT PLANTS PROCESS DESCRIPTION. 2 Water Treatment Plants PROCESS DESCRIPTION 1.Water line 2.Mud line 3.Criteria of use for Power Electronics."— Presentation transcript:

1 WATER TREATMENT PLANTS PROCESS DESCRIPTION

2 2 Water Treatment Plants PROCESS DESCRIPTION 1.Water line 2.Mud line 3.Criteria of use for Power Electronics equipments SUMMARY

3 3 General Process WATER LINE 1

4 4 WATER LINE 1.Water entry and rough- dressing 2.Elevation 3.Reagents dosage 4.De-sanding and Degreasing 5.Primary decantation 6.Biological reagents 7.Clarifiers Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

5 5 1. WATER ENTRY AND ROUGH-DRESSING ENTRY: Through several collectors. LARGE OBJECTS PRE – ROUGH- DRESSING Well of large objects with a first pre- roughdressing railing of 25cm. It is removed once a day, introducing a bivalve “spoon” and cleaning the bottom of the well. » Water collectors » Pre-roughdressing of large objects Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

6 6 1. WATER ENTRY AND ROUGH-DRESSING LARGE OBJECTS PRE-ROUGHDRESSING: Waste removal TRANSPORT BANDS: Temporized action according to the elevation and descent cycle of the railings. In case of raining, the cadence is decreased increasing the frequency of elevation and descent of it. » Large objects removal Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

7 7 1. WATER ENTRY AND ROUGH-DRESSING LARGE OBJECTS PRE-ROUGHDRESSING: It is a complement for the previous phase by means of two rough-dressing railings of 10cm. » Large objects rough-dressing RAKES Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

8 8 1. WATER ENTRY AND ROUGH-DRESSING ROUGH-DRESSING OF SMALL OBJECTS: Part of the previous process. Two railings of 3,5 cm. The rakes sweep out all the material, which falls on a conveyor belt. THE ELEVATION PROCESS IS MADE PREVIOUSLY. (There are Wastewater treatment plants where the elevation is made after all rough-dressings). TRANSPORT BANDS FOR ROUGH- DRESSING OF SMALL OBJECTS: Its action depends on the elevation and descent cycle of the rakes. RAKES » Transport bands for small objects » Small object rough- dressing Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

9 9 2. WATER ELEVATION » Elevation submerged pumps In the rough-dressing processes, water is raised up to 8,28 meters height, with two complementary drives: FIRST DRIVE: TWO SUBMERGED PUMPS Flow = 1,2m³/seg. Advantage = Less maintenance required than the screws (belts, bearings, …). Disadvantage = More sensitive to obstructionMore sensitive to obstruction Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

10 10 2. WATER ELEVATION » Screw of Archimedes In the rough-dressing processes, water is raised up to 8,28 meters height, with two complementary drives: SECOND DRIVE: SCREW OF ARCHIMEDES Flow = 1,24m³/seg. Advantage = Great elevation capacity. Immune to obstructions. Disadvantage = High maintenance cost. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

11 11 2. WATER ELEVATION » Elevation pump 01 In the channel there are ultrasonic probes of 6m scope to measure the height of the water surface, they measure the level. They are ultrasonic to avoid the contact with the water. FUNCTIONING: » If the water surface goes down (decreases), then the intelligent system stops the pumps to protect them. » If the water surface goes up (increases), then the system starts them again according to the set reference. » Elevation pump 02 Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

12 12 2.a. ROUGH-DRESSING EXIT AND BIFURCATION » First flow division in the plant FIRST FLOW DIVISION IN THE PLANT. After the rough-dressing process the water line bifurcates symmetrically. Both circuits work equally. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

13 13 3. REAGENTS DOSAGE » Reagent dosage centre REAGENTS CONTROL CENTRE: There is an automatic and centralized pumps system which allows a correct dosage of reagents. The main object consist in helping the increase of the size and weight of certain organic particles during this phase, so that the sedimentation, which will begin in the next stage will be easier and faster. This way, the performance of the plant is optimized. Two kind of reagents are dosed: » COAGULANTS » FLOCCULANTS Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

14 14 3. REAGENTS DOSAGE » Ferric sulphate dosage pumps COAGULANTS DOSAGE: It is a compound called Ferric Sulphate. It is very dense like sweet and can be stored in deposits, and it will be diluted into water to be dosed afterwards. It will be aggregated to the purifying process in first place. » Ferric sulphate pump detail THREE DOSAGE PUMPS Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

15 15 3. REAGENTS DOSAGE » Ferric sulphate storage COAGULANTS STORAGE: Storage deposits don’t need to be in the control center of dosage. » Ferric sulphate dosage COAGULANT ADDITION Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

16 16 3. REAGENTS DOSAGE » Polyelectrolyte dosage pumps » Polyelectrolyte pump detail TWO DOSAGE PUMPS FLOCCULANTS DOSAGE: It is a compound called Polyelectrolyte. It is always delivered as powder, which is diluted into water, where will remain during one hour (maturing process). Afterwards it will be dosed. It is the second one to be aggregated to the purifying process. POLYELECTROLYTE Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

17 17 4. DE-SANDING AND DEGREASING » De-sander and de-grassing channel » De-sander bridge detail DE-SANDER: It is a wide double channel with a cross carriage (similar to a crane), which sweeps out the whole channel very slowly, so that the submerged pump attached will suction the sand of the channel. PUMP + CARRIAGE Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

18 18 4. DE-SANDING AND DEGREASING » Sands dryer » Final waste sand SAND EXTRACTION: The extracted sand is pressed dry in the sand classifier (there is one in each side of the channel) This is already a waste, which will be carried to an authorized wasteway. SANDS CLASSIFIER Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

19 19 4. DE-SANDING AND DEGREASING » Channel sides for greases extraction GREASING EXTRACTION: Meanwhile the sand is extracted, the grease is separated and moved toward the sides, where a scraper will push it to the end of the channel. At the end of the channel there are two wells where this grease is collected. » De-sander and degreasing channel TWO SIDES PER CHANNEL Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

20 20 4. DE-SANDING AND DEGREASING » Sands dryer » Degreaser detail DEGREASER GREASING EXTRACTION : The grease is collected in the degreaser (one for all the channels). This waste will be carried to an authorized wasteway. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

21 21 4.a. DE-SAND EXIT AND NEW BIFURCATION » Bifurcation of sands collector » Detail of sands exit SANDS EXTRACTION BIFURCATION SECOND CHANNEL DIVISION IN THE PLANT. After the de-sander the channel bifurcates symmetrically once again. At the end of the de-sanders there are four decanters. Every circuit (four in total) works the same way. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

22 22 5. PRIMARY DECANTATION » Primary decanter MUD DECANTATION AND FLOATING – PARTICLES COLLECTION: The water is distributed into 4 decanters of Ø 40m and 3m height with a capacity of 3.700m³. They are provided with a radial bridge which has scrapers in the bottom part for mud extracting and additionally it has a superficial scrapers to collect the floating-particles (surfs). Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

23 23 5. PRIMARY DECANTATION » Primary decanter detail MUD DECANTATION AND FLOATING – PARTICLES COLLECTION : Sweep time approximately 45. min. Water must remain 1.5 hours inside the decanter. Water enters the decanters in the middle through a baffle, which breaks the speed, and goes out through the perimeter. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

24 24 6. BIOLOGICAL REAGENTS » Biologic reactors detail 01 TREATMENT WITH MICROORGANISM: When water is in this stage, germs which grow up here feed themselves with all the biodegradable particles contained in the water. This germs live thanks to the oxygen, which is constantly blowed. » Biologic reactors 01 Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

25 25 6. BIOLOGICAL REAGENTS OXYGEN BLOWING: Four reactors with 5.200m³ of unitary volume which are provided with four airing units as turbines of 180CV, two of them of double speed. » Biologic reactors detail 02 » Biologic reactors 02 Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

26 26 6. BIOLOGICAL REAGENTS » Airing units OXYGEN BLOWING: To keep constant the bacterium volume, it is required to control the oxygen blowing. That’s the reason for having double speed in the turbines: to control the speed depending on this parameter. Double speed control: » SLOW SPEED » HIGH SPEED Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

27 27 7. CLARIFIER » Secondary decanter 01 SECONDARY DECANTATION: To decant all those particles which did not sediment in the first stage, by means of the transformation suffered thanks to the biologic reactors action. » Secondary decanter detail 01 FLOATING SURFS Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

28 28 7. CLARIFIER » Secondary decanter 02 » Secondary decanter detail 02 SECONDARY DECANTATION : The process is realized on four circular clarifiers with 45m of diameter and 3m height. They have a unitary volume of 4.770m³, where the biologic mud sediment, and separate from the purified water. A part of the floating surfs escape out of the clarifier. This will be correct if the water conditions are under the established limits. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

29 29 7.a. WATER LINE END » Albufera regeneration » Coast line regeneration PURIFIED WATER EXIT: The purified water can follow three different process: 1. Irrigation net. 2. Emissary and sending to the sea. Maintenance and regeneration of the coast line. 3. Third treatment and afterwards 3.1. Irrigation 3.2. Emissary and sending to the see. PURIFIED WATER: Ready for irrigation, cultivation, Albufera maintenance. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

30 30 INDUSTRIAL WATER » Sand filter for industrial water» Industrial water group INDUSTRIAL WATER: In the treatment plant there is an internal industrial water network. The water exiting from the clarifiers which goes to this industrial water system, has to go into a sand filter tank firstly and after that can incorporates to the water distribution system. Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

31 31 EMISSARY » Emissary – water to the sea 02 EMISSARY: The water not assigned for irrigation, goes to the emissary to be pumped to the sea. The sending of submarine water is realized by means of motors and gravidity. » Emissary – water to the sea 01 Water Treatment Plants PROCESS DESCRIPTION – WATER LINE

32 32 General Process MUD LINE 2

33 33 MUD LINE 1.Thickener – Floater 2.Digester – Gas-meter 3.Dehydration Water Treatment Plants PROCESS DESCRIPTION – MUD LINE

34 34 1. THICKENER - FLOATER MUD SEPARATION AND BIOLOGIC MUD: Before make themselves thick, the mud must suffer a sifting process to avoid further problems in the digestion process. Installations consist of: Three thickeners based on gravidity (primary mud: diameter 27m and 3m height). Its functioning is similar to decanters functioning, the scraper sweeps the bottom instead of the surface. MUD EXTRACTION PUMPS » Gravidity thickeners» Mud extraction pumps in thickeners Water Treatment Plants PROCESS DESCRIPTION – MUD LINE

35 35 1. THICKENER - FLOATER MUD EXTRACTION PUMPS MUD SEPARATION AND BIOLOGIC MUD: Before make themselves thick, the mud must suffer a sifting process to avoid further problems in the digestion process. Installations consist of: A floater (biologic mud: diameter 12,5m and 393m³ volume). In this floater air is injected in order to help the mud to float, so that can be removed by means of a superficial scraper. » Mud floater» Mud extraction pumps in floaters Water Treatment Plants PROCESS DESCRIPTION – MUD LINE

36 36 At the end of this process we obtain two products: Treated mud: Which will suffer a dehydration process to be transformed into fertilizer. Biogas: That is a gases mix containing 65% of Methane. This gas will be employed in generating electric energy. 2. DIGESTER – GAS-METER » Mud digester MUD DIGESTION: The digesters function is to produce a biochemical transformation in the mud during 21 days at 37ºC of temperature, reducing in this way the organic material around the 40%. Water Treatment Plants PROCESS DESCRIPTION – MUD LINE

37 37 3. DEHYDRATION » Mud centrifugal machine to remove water REAGENTS INJECTION: Mud and polyelectrolyte are injected before realizing the centrifuging. Dosage pumps pretend to dose the maximum mud amount as possible to optimize the efficiency of the process. The polyelectrolyte must mature during 1 hour like in the water line process. CENTRIFUGAL MACHINES Water Treatment Plants PROCESS DESCRIPTION – MUD LINE

38 38 CONTACTORS HYDRAULIC - RELAYS VSD / SOFTSTARTERS PNEUMATIC - RELAYS CONTACTORS CONTACTORS VARIABLE SPEED DRIVES CONTACTORS COMPLETE LINES: FLOW DIAGRAM FOR WATER AND MUD. ACTUATORS CONTACTORS VSD / SOFTSTARTERS Water Treatment Plants PROCESS DESCRIPTION

39 39 Criteria of use for Power Electronics Devices VARIABLE SPEED DRIVES & SOFTSTARTERS 3

40 40 Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES

41 41 » TRANSPORT BANDS PRE – ROUGH-DRESSING OF LARGE OBJECTS 3kW: Contactors. » RAKES FOR ROUGH-DRESSING THE LARGE OBJECTS: Relays use. Hydraulic system. Recommended equipments: » V2 and V5 softstarters. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] WATER LINE – ACTUATORS FOR PRE-ROUGH-DRESSING AND ROUGH-DRESSING OF LARGE OBJECTS STAGES This stage intend to extract the bigger residual objects to make easy keeping the flow constant. This action is realized one per day using small powers. At first moment there are no Power Electronics devices although the softstarters means always an improvement to make the system automatic. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES

42 42 » TRANSPORT BAND FOR SMALL OBJECTS ROUGH-DRESSING 3kW: Contactors. » RAKES FOR SMALL OBJECTS ROUGH-DRESSING: Relays use. Hydraulic system. Recommended equipments: » V2 and V5 softstarters. [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ] WATER LINE – ACTUATORS FOR SMALL OBJECTS ROUGH-DRESSING STAGE This stage intend to extract the smaller residual objects to make easy keeping the flow constant. This is an automatic operation realized increasing or decreasing the cadence depending on the requirements. At first moment there are no Power Electronics devices although the softstarters means always an improvement to make the system automatic. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES

43 43 » SUBMERGED PUMPS: Variable Speed Drives. Recommended equipments: » SD700 Series » SD450 Series WATER LINE – ACTUATORS FOR ELEVATION STAGE The submerged pumps try to keep the input flow constant in order to warranty a correct treatment of the water, always considering that there is no possibility of accumulating this input water. The variable speed drive allows regulate the speed required to keep this flow constant. Its possible to overcome problems if one of the lines is stopped or if a part of the plant is on maintenance. The VSD allows to control the flow without stopping one of the pumps completely. The demanded flow is divided between both pumps. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

44 44 »SCREW OF ARCHIMEDES: Softstarter. Recommended equipments: » V5 Softstarter. WATER LINE – ACTUATORS FOR ELEVATION STAGE The screw has a gate to regulate the flow but if the flow increases, the screw will try to elevate more water. That could provoke it to be broken. To avoid this situation, it is possible to fix a current signal as a reference thanks to a transformer in order to protect the screw. This system could be improved implementing a VSD controlled by this current signal. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

45 45 »THREE PUMPS FOR COAGULANTS DOSAGE: Variable Speed Drives. » TWO PUMPS FOR FLOCCULANTS DOSAGE: Variable Speed Drives. Recommended equipments: » SD100 Series. » SD250 Series. » SD450 Series. WATER LINE – ACTUATORS FOR REAGENTS DOSAGE STAGE Allows to control the exact dosage of the reagents according to the results of test and analysis realized on the laboratory each hour. Without VSD it would not be possible. Complete control total of the dosage to treat correctly water with different quality (for example cleaner water and higher amount in summer). Possibility of implement a closed control loop with the drives, where the reference will be a signal coming from the flowmeters. If the flow increases / decreases  the dosage will be increased / decreased. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

46 46 » DE-SANDER PUMP: Contactors. » MOTOR OF DE-SANDER CARRIAGE: Contactors / reverse operation. » MOTOR FOR THE BAND OF THE SAND CLASSIFIER: Pneumatic. Relays. » MOTOR FOR GREASE SCRAPER: Pneumatic distributor. » DE-GREASER: Mechanical. Recommended equipments: » V2 and V5 softstarters. WATER LINE – ACTUATORS FOR DE-SANDING AND DE-GREASING This stage tries to eliminate the finest sands and greases of the process. Those actions are continuously realized. The power used is small. At first moment there are no Power Electronics devices although the softstarters means always an improvement to make the system automatic. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

47 47 » MOTOR FOR IMPULSE MUD TO DECANTATION: Contactors. » MUD PURGE: Contactors. » FLOATING SURFS ELIMINATION: Contactors. Recommended equipments: » V2 and V5 softstarters. » SDRIVE VSD (small power) WATER LINE – ACTUATORS FOR PRIMARY DECANTATION STAGE To separate mud from the water to insert it on the mud line. The mud purge is done step by step and it is a timer action. By calculating the mud amount it could be possible to use a turbidimeter and a drive to control the flow. The sweeping process is continuous, the required power is small and the speed is fixed, for all that Power electronics softstarters could means an improvement. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

48 48 » OXYGEN BLOWING TURBINES: Softstarters. Recommended equipments: » V2 and V5 softstarters. WATER LINE – ACTUATORS FOR BIOLOGIC REACTORS STAGE In these tanks the bacterium should be keeping alive and in an appropriate number according to the process and the analysis. As an alternative to the softstarter a VSD could be used since it offers more regulation points. An oxygen meter could be implemented giving a signal to the drive (Xppm of oxygen dosed by the drive). Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

49 49 » MOTOR FOR IMPULSION TO MUD DECANTERS: Contactors. » MUD PURGE: Contactors or Softstarter. » FLOATING SURFS ELIMINATION: Contactors. » MUD RE-CIRCULATION: Contactors. Recommended equipments: » V2 and V5 softstarters. » SDRIVE VSD (small power) WATER LINE – ACTUATORS IN THE SECONDARY DECANTATION To separate the mud from the water to insert it on the mud treatment line. A part of it goes directly to the biologic tanks to keep the bacterium number in accordance to the requirements. The mud purge is done step by step and it is a timer action. By calculating the mud amount it could be possible to use a turbidimeter and a drive to control the flow. The re-circulation is continuous and the volume is high (1300m³/h). The sweeping process is continuous, the power required is small and the speed is fixed, for those reasons Power electronics softstarters could means an improvement. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

50 50 » MOTOR FOR INDUSTRIAL NET PUMPS: 1 VSD + 2 Softstarters. » MOTOR FOR IRRIGATION NET PUMPS: Variable Speed Drives. Recommended equipments: » SD700 Series » SD450 Series » V5 Softstarter WATER LINE ACTUATORS FOR PRESSURE GROUP – INDUSTRIAL NET – IRRIGATION NET Typical pumping control application. It intends to control the pressure on the internal distribution system of industrial water. The irrigation of the whole plant is also controlled by VSD. Versatile and flexible: The control is done by the drive. In case of a fault, the PLC will take the control over the softstarters. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

51 51 » MOTORS OF THE EMISSARY: 1 VSD + 2 Softstarters + Contactors. Recommended equipments: » SD700 Series » V5 Softstarters WATER LINE – ACTUATORS OF EMISSARY Pumping control application where there is so much flow and the height is small. The pumps go out of the curve easily and the consumption increases excessively. Here is needed a startings number optimizing (the rest of the process to lead the water to the sea is done by gravidity). Equipment regulation allows to start the pump only 1 or 2 times per day, saving around €/month. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

52 52 » MOTOR FOR BOTTOM SCRAPER: Contactors. » MUD EXTRACTION PUMPS : Softstarter or Variable Speed Drives. Recommended equipments: » SD700 Series » V5 Softstarters MUD LINE – ACTUATORS FOR THICKENERS Once the mud is collected and has to be sent to the digester, it is convenient that the additions are as homogeneous as possible. We get a great help from the drive in this dosage. In this stage we pretend to optimize the startings to avoid the mud hammer because due to the mud density, the pipes of the installation could be seriously damaged. Distances to the digester are big and the column of mud to be supported is high. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

53 53 » MOTOR OF SUPERFICIAL SCRAPER: Variable Speed Drive. » MUD EXTRACTION PUMPS: Softstarter or Variable Speed Drives. » PRESSURIZING PUMPS : Softstarter. Recommended equipments: » SD700 Series » V5 Softstarter MUD LINE – ACTUATORS FOR FLOATER The superficial mud varies continuously. To keep the sweeping constant a variable speed drive is use, to set the system according to the current mud amount. In this stage we pretend to optimize the startings to avoid the mud hammer because due to the mud density, the pipes of the installation could be seriously damaged. Distances to the digester are big and the column of mud to be supported is high. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

54 54 » MUD MOVEMENT PUMPS: Softstarter or Star – Delta contactor. Recommended equipments: » V5 Softstarter. MUD LINE – ACTUATORS FOR DIGESTER – GAS-METER STAGE In this stage the material is reduced and as a secondary effect a gas generation is produced. This gas is used in the cogeneration plant. The pipes are suffering considerably. Using a softstarter this situation will be improved. The pumps that move the mud stop two times per day for cleaning process. Each time a new start occurs will appear the “mud hammer” problem. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

55 55 » DOSAGE PUMPS FOR MUD AND REAGENTS: Variable Speed Drives. » CENTRIFUGAL MACHINES: Variable Speed Drives. Recommended equipments: » SD700 Series » SD450 Series MUD LINE – ACTUATORS FOR DEHYDRATION STAGE The pumps that realize the dosage must be set at several reference points. Depending on the realized tests, it should be possible to calculate the reagent dose. Without drives this process could not be realized. The starting of the centrifugal machines requires a huge inertia moment. That implies to apply a starting ramp very long (3 – 4min). Only the VSD can offer this warranty. Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES [ POWER ELECTRONICS EQUIPMENTS USE JUSTIFICATION ]

56 56 EXAMPLE: In = 150A Selected Frame = 210A Maximum Torque = 1,5Tn Imax = 1,5x210 = 310A MOTOR TORQUE CURVES Relation Tmax/Tn 310 / 150 = 2,1Tn [ BACK TO ELEVATION ][ BACK TO ELEVATION ] Water Treatment Plants CRITERIA OF USE FOR POWER ELECTRONICS DEVICES

57 Thanks for your attention Presentation WATER TREATMENT PLANT: Process description Realized Pilar Navarro Organized Marketing Department ©2006 Power Electronics, S.L.


Download ppt "WATER TREATMENT PLANTS PROCESS DESCRIPTION. 2 Water Treatment Plants PROCESS DESCRIPTION 1.Water line 2.Mud line 3.Criteria of use for Power Electronics."

Similar presentations


Ads by Google