B09_29_44_42_30B_Rotary_Drum_Screen_and_Compactor_0005.pdf

YOSE 215363 ROTARY DRUM SCREEN AND COMPACTOR

PW\DEN003\D3167633 44 42 30 - 1

SECTION 44 42 30

ROTARY DRUM SCREEN AND COMPACTOR

EQUIPMENT AND COMPONENT NUMBER(S)

20-SCN-110: Rotary Drum Screen.

PART 1 GENERAL

1.01 REFERENCES

A. The following is a list of standards which may be referenced in this section:

1. American Bearing Manufacturers’ Association (ABMA): 11, Load Ratings and Fatigue Life for Roller Bearings.

2. American Gear Manufacturers Association (AGMA):

a. 2015-1-A01, Accuracy Classification System – Tangential

Measurements for Cylindrical Gears.

b. 6034-B92, Practice for Enclosed Cylindrical Wormgear Speed

Reducers and Gearmotors.

c. 9005-E02, Industrial Gear Lubrication.

3. American Welding Society (AWS):

a. D1.1/D1.1M, Structural Welding Code – Steel.

b. QC 1, Standard for AWS Certification of Welding Inspectors.

4. ASTM International (ASTM):

a. A380, Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems.

b. C582, Standard Specification for Contact-Molded Reinforced

Thermosetting Plastic (RTP) Laminates for Corrosion-Resistant Equipment.

c. D3917, Standard Specification for Dimensional Tolerance of Thermosetting Glass-Reinforced Plastics Pultruded Shapes.

5. National Electrical Code (NEC).

6. National Electrical Manufacturers’ Association (NEMA): MG 1, Motors and Generators.

7. National Fire Protection Association (NFPA): 820, Standard for Fire

Protection in Wastewater Treatment and Collection Facilities.

8. UL: 674, Electric Motors and Generators for Use in Division 1

Hazardous (Classified) Locations.

1.02 SUBMITTALS

A. Action Submittals:

1. Shop Drawings:

a. Manufacturer’s catalog information, descriptive literature, specifications, and identification of materials for construction.

ROTARY DRUM SCREEN AND COMPACTOR YOSE 215363

44 42 30 - 2 PW\DEN003\D3167633

b. Detailed structural, mechanical, and electrical drawings showing equipment fabrications and interface with other items.

c. Dimensions, size, and locations of connections to other work.

d. Details of attachment and support in channel.

e. Gear output torque and rake weight lifting capacity calculations.

f. Complete motor nameplate data, as defined by NEMA, motor manufacturer, and motor modifications. See Section 26 20 00, Low-Voltage AC Induction Motors, for motor submittal requirements.

g. Functional description of internal and external instrumentation and controls including list of parameters monitored, controlled, or alarmed.

h. Control panel elevation drawings showing fabrication and placement of operator interface devices and associated elements.

i. Power and control wiring diagrams, including terminals and numbers.

j. See Section 40 99 90, Package Control Systems, for additional submittal requirements.

k. Shop painting systems, including manufacturer’s descriptive technical catalog literature and specifications.

l. External utility requirements for air, water, power, drain for each component.

m. Drawings of equipment enclosures designed and stamped by professional structural engineer.

n. Seismic anchorage and bracing drawings and cut sheets, as required by Section 01 88 15, Anchorage and Bracing.

B. Informational Submittals:

1. Statements of Qualification: Professional structural engineer registered in the state of California.

2. Seismic anchorage and bracing calculations as required by Section 01 88 15, Anchorage and Bracing.

3. Manufacturer’s Certificate of Compliance, in accordance with Section 01 67 00, Product Requirements, of factory-applied coating system.

4. Manufacturer’s installation instructions.

5. Special shipping, storage and protection, and handling instructions.

6. Written factory test report of inspection.

7. Manufacturer’s Certificate of Proper Installation, in accordance with

Section 01 79 00, Demonstration and Training.

8. Field functional test reports.

9. Operation and Maintenance Data: As specified in Section01 78 23, Operation and Maintenance Data, including routine maintenance requirements prior to plant startup.

10. Welder/welding operator qualifications.

PW\DEN003\D3167633 44 42 30 - 3

11. Welding inspector credentials.

12. Welding Inspector’s Report.

1.03 QUALIFICATIONS

A. Registered Professional Structural Engineer registered in State of California.

B. Welder/Welding Operator: In accordance with AWS D1.1/D1.1M.

C. Welding Inspector: Certified in accordance with AWS QC 1, and having prior experience with welding codes specified.

1.04 EXTRA MATERIALS

A. Furnish, tag, and box the following spare parts and special tools:

Item Quantity

Speed reducer One Drive shaft end bearings One complete set Guide rollers of each different size One complete set Screen basket One Brush One Special tools required to maintain or dismantle unit

One complete set

B. Delivery: In accordance with Section 01 67 00, Product Requirements.

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Equipment and accessories specified in this section shall be products of:

1. JWC Environmental; SLB636.

2. Or equal.

2.02 SERVICE CONDITIONS

A. Material Handled: Raw sewage.

B. Location: Indoors.

C. Exposure: Variable concentrations of hydrogen sulfide.

D. Maximum Flow Rate: 150 gpm with less than 6 inches head loss with flow passage area 50 percent blocked.

44 42 30 - 4 PW\DEN003\D3167633

E. Minimum Flow Rate: 10 gpm.

F. Discharge at minimum elevation of 3 feet 6 inches above operating floor.

G. Equipment Environment Application Rating: NEC, Class I, Division II, NEMA 7.

2.03 EQUIPMENT

A. General:

1. Collect, elevate, compact, and remove/discharge plastics, rags, floatables, and other debris from influent flow stream.

2. Furnish a unit consisting of an internal auger with cleaning brushes along a fixed screen cylinder with perforations to facilitate drainage of pressate from flow stream.

3. Drive mechanism shall use electric motor and speed reducer to turn the auger.

4. Equipment shall compact and discharge collected screenings at end of auger to a bagging mechanism.

5. Positively clean screening cylinder with automatically operated spray nozzle assembly.

6. Do not permanently locate bearings, shafting, or other revolving parts below maximum liquid surface in channel.

7. Parts shall be able to withstand ultimate torque of twice running torque.

B. Drum Screen Element:

1. Drainage Zone: 6 mm perforated plate, Type 316 stainless steel.

2. Press Zone: Wedge wire, Type 316 stainless steel.

C. Drive Unit:

1. Enclosed shaft mounted helical worm-gear or helical level gear type speed reducer directly connected to flanged, gasketed, and integrally mounted electric motor.

2. Speed Reducer:

a. Cast-iron housing.

b. Conform to AGMA 6034-B92.

c. Minimum service factor rating of 1.0 based upon motor nameplate horsepower, or 1.4 based on design operating load, whichever is greater.

d. Minimum AGMA 2015-1-A01, Service Class 2.

e. Antifriction bearings with ABMA L-10 life of 100,000 hours minimum. Tapered roller bearings on output shaft.

f. Oil fill, drain, and level indicator devices with lubricant in accordance with AGMA 9005-E02.

PW\DEN003\D3167633 44 42 30 - 5

3. Drive Motors: Refer to Induction Motor Data Sheet following “End of Section.”

D. Screen Zone and Body Spray Wash:

1. Provide spray nozzle system for cleaning the wash and screening zones during operation to avoid clogging and allow unobstructed drainage of pressate from unit to the downstream influent channel.

2. Spray Header:

a. 1/2-inch Schedule 80 steel pipe.

b. NPT female threaded connections.

3. Valves:

a. Two NC space-rated solenoid valves.

b. Two stainless steel isolation ball valves.

E. Structural Frame:

1. Type 304 stainless steel angled shapes minimum 1/4 inch thick.

2. Attach to concrete floor with minimum 3/8 inch thick grouted baseplate using minimum 1/2-inch adhesive anchors, as specified in Section 05 50 00, Metal Fabrications.

3. Height of legs shall accommodate minimum 1 foot 0 inch between operating floor and discharge pipe flange on bottom of unit and accommodate elevations of influent piping as shown on the Drawings.

F. Equipment Enclosure:

1. Type 304 stainless steel construction.

2. Housing shall include inspection doors with gaskets.

3. Provide twist-locking, hinged type covers on unit to access unit’s internal components.

4. Fasteners required to assemble housing shall be Type 316 stainless steel.

G. Influent Diversion Box:

1. Box shall include internal weir intended for bypass of screen unit in the event that the influent to screen is clogged.

2. Type 304 stainless steel construction.

3. Piping Connection Type: Flanged.

4. Provide manufacturer’s standard vent assembly on top of box.

5. Height of legs shall accommodate elevations of influent piping as shown on the Drawings.

H. Discharge Bagging Device: Continuously fed, closed-bag system that connects to discharge flange of screen unit. Screenings shall discharge from unit into sealed bag such that material and odors are trapped within.

44 42 30 - 6 PW\DEN003\D3167633

I. Dumpster Bin:

1. Rollable trash receptacle with lid, used to hold and transport full screening collection bags.

2. Capacity: 65 gallons.

3. Materials:

a. Bin: Polyethylene.

4. Wheels: Two large, 10 inch front rubber wheels.

J. Manual Bar Screen (20-BSCN-120):

1. In addition to motorized drum screen, provide a manual bar screen for use when motorized screen is out of service.

2. Manual bar screen shall be installed in the influent channel where indicated on the Drawings.

a. Bars shall have minimum 1-inch spacing between each, installed at a 60-degree angle relative to the bottom of the channel.

b. The top of bar screen and dewatering plate must be securely anchored to the channel walls such that there is no interference with the specified grating covering the channel.

3. Materials: All materials of construction shall be Type 304 stainless steel, including anchorage hardware.

4. Provide a 1-foot 6-inch square perforated plate at the top of the inclined bars to facilitate dewatering and drainage of raked solids.

2.04 APPURTENANCES

A. Nuts, bolts, and other fasteners, Type 304 stainless steel.

B. Furnish lifting lugs for equipment assemblies and components weighing over 100 pounds.

C. Equipment Identification Plates: 16-gauge, Type 304 stainless steel securely mounted on main structural frame and control panel in readily visible location.

Plate shall bear 1/4-inch high engraved block type black enamel filled equipment identification number/tag and letters.

D. Anchor Bolts: Type 316 stainless steel, sized by equipment manufacturer, 1/2-inch minimum diameter, and as specified in Section 05 50 00, Metal Fabrications.

2.05 CONTROLS

A. In accordance with general control requirements and component qualities specified in Section 40 99 90, Package Control Systems, and as listed below.

B. Power Requirements: Power supply shall be 480 volts, three-phase, supplied to control panel.

PW\DEN003\D3167633 44 42 30 - 7

C. Devices and Components:

1. Local Control Panel (20-LCP-110):

a. NEMA 7 stainless steel enclosure.

b. Fused main disconnect.

c. Control transformer, 460V to 115V.

d. Motor starter.

e. Operator switch for the following:

1) E-stop.

2) Control power.

3) HOA switch for screen.

4) Reset push button to reset alarms.

f. Timers for controlling run time of motors and valves in automatic mode of operation.

g. Dry contacts for system start, alarms, and run status.

2. Local Control Station (20-LCS-110):

a. NEMA 7 stainless steel enclosure.

b. HOA switches for both wash water solenoids.

c. E-stop push button for drum screen.

3. Field Devices: Two solenoid valves for controlling wash water to screen.

a. 20-SV-104.

b. 20-SV-105.

D. Operator Indications:

1. Provide the following indicators at local control panel:

a. Power on indicating light.

b. Running on indicating light.

c. Failure indicating light.

d. Level indicator.

E. Functional Requirements:

1. Local Control Panel:

a. Provide control system for manual and automatic operation of mechanical drum screen.

b. Operation of mechanical drum screen shall be controlled by

HAND/OFF/AUTO selector switch.

c. When selector switch is in OFF position, the screen will not run.

d. When selector switch is in HAND position, the screen will run continuously.

e. In AUTO mode, the screen will run after the permissive signal is received. The screen will continue to run for the set run time (adjustable) after the permissive signal ends.

44 42 30 - 8 PW\DEN003\D3167633

f. A high-torque limit switch shall stop forward motion of screen motor, light FAIL indicating light and send alarm output should torque exceed set point value.

g. If drum screen control system includes automatic reversing function, reverse motion inhibit limit switch shall be provided to prevent reverse motion of screen motor when reverse motion could damage screen.

2. Local Control Station:

a. Provide control system for manual and automatic operation of two wash water solenoid valves.

b. Operation of each solenoid valves shall be controlled by a

HAND/OFF/AUTO selector switch.

c. Screen Shower Solenoid Valve:

1) IN OFF mode, the valve will be closed, and shower water will not flow.

2) In HAND mode, the valve will open and shower water will flow continuously.

3) In AUTO mode, the valve will open and close based on cycle whenever the drum screen is operating. The ON and OFF periods shall be adjustable.

d. Screen Bottom Spray Solenoid Valve:

1) In OFF mode, the valve will be closed, and the bottom spray water will not flow.

2) In HAND mode, the valve will open and the bottom spray water will flow continuously.

3) In AUTO mode, the valve will open and close based on cycle whenever the drum screen is operating. The ON and OFF periods shall be adjustable.

2.06 FABRICATION

A. Welded Construction: Comply with AWS D1.1/D1.1M for procedures, appearance, and quality of welds, and methods used in correcting welding.

2.07 FINISHES

A. For non-stainless steel surfaces, prepare, prime, and finish coat in accordance with Section 09 90 00, Painting and Coating.

B. Stainless steel shall be cleaned and passivated following fabrication in accordance with ASTM A380.

2.08 SOURCE QUALITY CONTROL

A. Factory Inspections: Inspect control panels for required construction, electrical connection, and intended function.

PW\DEN003\D3167633 44 42 30 - 9

B. Factory Tests and Adjustments:

1. Test each screen assembly, in its operating position, to ensure meshing of rake and drum rack, and operation of protective devices and override controls.

2. Run equipment and test for minimum of 6 hours. Testing shall be done in factory with unit oriented in its installed position.

PART 3 EXECUTION

3.01 INSTALLATION

A. In accordance with manufacturer’s written instructions.

B. Anchor Bolts: Accurately place using templates provided by manufacturer and as specified in Section 05 05 19, Post-Installed Anchors.

3.02 FIELD FINISHING

A. Touchup damaged areas of painted ferrous metal in accordance with and as specified in Section 09 90 00, Painting and Coating.

3.03 FIELD QUALITY CONTROL

A. Functional Test: Conduct on each mechanically cleaned drum screen assembly. Test shall include 4 hours continuous operation of each screen.

3.04 MANUFACTURER’S SERVICES

A. Manufacturer’s Representative:

1. Present at Site or classroom designated by Contracting Officer, for minimum person-days listed below, travel time excluded:

a. 1/4 person-day for installation assistance and inspection.

b. 1/2 person-day for functional and performance testing and completion of Manufacturer’s Certificate of Proper Installation.

c. 1/4 person-day for post-startup training of Government’s personnel. Training shall not commence until an accepted detailed lesson plan for each training activity has been reviewed by Contracting Officer.

B. See Section 01 79 00, Demonstration and Training, and Section 01 91 15, Equipment Testing and Startup.

44 42 30 - 10 PW\DEN003\D3167633

3.05 SUPPLEMENT

A. The supplement listed below, following “End of Section,” is a part of this specification:

1. Rotary Drum Screen Induction Motor Data Sheet.

END OF SECTION

PW\DEN003\D3167633 44 42 30 SUPPLEMENT - 1

ROTARY DRUM SCREEN INDUCTION MOTOR DATA SHEET

Project: Tuolumne Meadows Water Reclamation Facility

Owner: National Park Service

Equipment Name: Rotary Drum Screen

Equipment Tag Number(s): 20-SCN-110

Type: Squirrel-cage induction meeting requirements of NEMA MG 1

Manufacturer: For multiple units of the same type of equipment, furnish motors and accessories of a single manufacturer.

Hazardous Location: Furnish motors for hazardous (classified) locations that conform to UL 674 and have an applied UL listing mark.

Motor Horsepower: 0.5 Guaranteed Minimum Efficiency at Full Load: ____ percent

Voltage: 460 Guaranteed Minimum Power Factor at Full Load: ____ percent

Phase: 3 Service Factor (@ rated max. amb. temp.): 1.0 1.15

Frequency: 60 Hz Enclosure Type: TEFC

Synchronous Speed: 1,750 rpm Multispeed, Two-Speed: ____ / ____ rpm

Thermal Protection: Winding: One Two

Space Heater: ____ volts, single-phase

Mounting Type: Horizontal Vertical

� Vertical Shaft: Solid Hollow

� Vertical Thrust Capacity (lb): Up ____ Down ____

Adjustable Speed Drive: See Section 26 29 23, Low-Voltage Adjustable Frequency Drive Systems.

Operating Speed Range: ____ to ____% of Rated Speed

Variable Torque

Constant Torque

Additional Motor Requirements: See Section 26 20 00, Low-Voltage AC Induction Motors.

Special Features: