POLYMER SYSTEM
PART 1 GENERAL
1.01 SCOPE OF WORK
A. Furnish all labor, materials, equipment and incidentals required and install a polymer system for sludge thickening complete as shown on the Drawings and as specified herein. The polymer systems shall be supplied by the centrifuge manufacturer.
B. Equipment included with each polymer system includes:
1. 450 gallon IBC Base Container manufactured by Assmann
2. Chem-Scale manufactured by Force Flow with Solo XT display
4. Mixing Chamber
5. Dilution Water Controls
6. Neat Polymer Pump
7. System Controls
8. Calibration Cylinder
C. The polymer system shall be a skid mounted system with interconnecting piping and wiring complete with skid limits.
1.02 RELATED WORK
A. Concrete work is included in Division 3.
B. Concrete bases for equipment and installation of anchor bolts is included in Division 3, but anchor bolts shall be furnished under this Section.
C. Painting is included in Division 9.
D. Instrumentation and control work, except as specified herein, is included in Division 13.
Instrumentation and controls provided in this section shall adhere to Instrumentation and
Control Specifications Sections in Division 13.
E. Piping, valves and appurtenances are included in the respective Sections of Division 15. F. Electrical work, except as specified herein is included in Division 16.
1.03 SUBMITTALS
A. Submit, in accordance with this Section, six copies of all materials required to establish compliance with this Section. Submittals shall include the following:
1. Certified shop and erection drawings showing all important details of construction, dimensions, and anchor bolt locations.
2. Descriptive literature, bulletins and/or catalogs of the equipment.
3. Calculations for sizing the polymer preparation system.
4. The empty and operating weight of each item of equipment.
5. A total bill of materials for all equipment.
6. All information required by Section 01170.
7. Complete motor data in accordance with Section 01171.
8. Complete master piping and wiring diagrams, elementary or control schematics and suitable control panel outline drawings.
9. Manufacturer's certificate of guarantee for the polymer make-up system, mixers, pumps and tanks.
B. Operation and Maintenance Data
1. Operating and maintenance instructions shall be furnished to the Engineer. The instructions shall be prepared specifically for this installation and shall include all required cuts, drawings, equipment lists, descriptions that are required to instruct operating and maintenance personnel unfamiliar with such equipment.
1.04 REFERENCE STANDARDS
A. American National Standard Institute (ANSI)
B. Occupational Safety and Health Administration (OSHA)
C. National Electrical Manufacturers Association (NEMA)
D. National Electrical Code (NEC)
E. Where reference is made to one of the above standards, the revision in effect at the time of bid opening shall apply.
1.05 QUALITY ASSURANCE
A. All of the equipment furnished under this Section shall be the product of manufacturers who are fully experienced, reputable and qualified in the manufacture of the system components to be furnished. The equipment shall be designed, constructed and installed in accordance with the best practices and methods.
B. All equipment and controls specified in this Section shall be furnished by a single supplier who shall assume full responsibility for the proper operation of the complete systems.
C. Provide the services of a factory representative, who has a complete knowledge of the proper operation and maintenance, for 2 days to instruct representatives of the Owner and the Engineer on proper operation and maintenance of the equipment. This work may be conducted in conjunction with the inspection of installation and test run as specified in PART 3. If there are difficulties in operation of the equipment due to the manufacturer's design or fabrication, provide additional service at no additional cost to the Owner.
1.06 SYSTEM DESCRIPTION
A. The polymer will be delivered in 350 gallon totes and loaded on a support stand above the polyethylene day tank. The liquid polymer will be transferred to the storage tank, which will be fed into the blending unit via the polymer feed pump.
B. Multi-Zone Mixing Chamber
1. Polymer and water shall be mixed in a chamber designed to create sufficient mixing energy.
a. This design may include a motor-driven impeller.
b. If an impeller is utilized, the solution shall undergo a tapered mixing intensity slope as it exits the initial sheer zone and passes through a second zone, isolated by a baffle.
c. Polymer activation efficiency shall be consistent over the dilution water range.
2. Mixing chamber shall be transparent to allow viewing of mixing intensity. Opaque mixing chambers shall be unacceptable.
3. Impeller (if applicable) shall be driven by a 1 HP heavy duty motor.
a. Motor shall be TEFC.
b. Impeller speed shall be 3450 rpm, minimum.
c. Motor shall be direct-coupled to impeller shaft.
C. Dilution Water Control
1. Dilution water shall be split into two streams. Primary water flow shall supply the mixing chamber. Secondary water flow shall be used to post dilute the activated polymer stream. These two streams shall be completely blended by a mixer prior to exiting the unit.
2. Unit shall have an electric solenoid valve for on/off control of total dilution water flow.
3. Flow indicators and flow control valves shall be provided for each dilution water stream.
4. Dilution water and solution output connections shall include 304 stainless steel unions connected to the chassis.
D. Pump
1. Unit shall have a neat polymer metering pump.
a. Pump shall be diaphragm type.
2. The pump shall be variable speed
E. Controls
1. Unit shall be controlled through an on-off-remote circuit controlled by a three-position switch.
a. In the remote switch position, the unit shall accept a start signal. b. Unit is manually controlled in the on position.
c. Controller shall indicate mode of operation with LED.
2. Unit shall accept a 4-20 mA analog signal to pace the polymer metering pump.
a. This signal shall be processed by a pump controller that may be mounted remotely.
b. The controller shall have LED readouts of pumping strokes per minute (or hour), a
stroke frequency touchpad pump control and a mode touchpad (internal-off-external)
for pacing signal selection.
3. Unit shall detect loss of water flow, sensing that water flow has been interrupted for any reason, will place the polymer pump and mix chamber on standby and will restart it automatically when flow is restored.
4. An integral timer shall monitor loss of flow and energize contacts indicating alarm after 15 seconds of continuous loss.
5. The following signals shall be available via hardwired contacts for remote monitoring from the SCADA system:
a. Polymer system On/Off status.
b. Polymer system Fail status.
c. Polymer system Local/Remote status.
D. Polymer Run Status
E. Weight of the Polymer in the Storage Tank
F. Calibration Cylinder
1. A suitably sized calibration cylinder shall be supplied for the neat polymer feed pump.
Cylinder shall be mounted to frame with PVC isolation ball valves. Cylinder shall be calibrated in mL, and be constructed of clear PVC with slip on cap and ½ inch NPT vent connection.
1.07 TECHNICAL DATA
A. Connections – Plumbing
1. Dilution water inlet: 1” FNPT
2. Neat polymer inlet: 1/2” FNPT
3. Solution discharge: 1” FNPT
1. Standard, grounded male plug: 120/1/60, 20 amps
2. Plug-in connection: 4-20 mA signal input
3. Terminal blocks: dry contact input for remote start
4. Terminal blocks: dry contact alarm output
5. Terminal blocks: dry contact run output
6. Terminal blocks: control switch status output
C. Materials of Construction
1. Structural frame: 304 Stainless Steel
2. Plumbing: PVC
3. Mixing Chamber: PVC, acrylic
D. Performance
1. Dilution water: 150-3000 gph primary mixing
150-3000 gph post dilution
2. Metering pump: 1.0-5 gph neat polymer
1.08 MAINTENANCE
A. Tools and Spare Parts
1. All special tools required for normal operation and maintenance of the equipment shall be furnished with the equipment by the manufacturer.
2. The following spare parts shall be furnished:
a. Two extra sets of all gaskets, packing, seals, diaphragms, O-rings, etc.
b. Spare pump head
c. Mixing Chamber Check Valve.
3. Start up and one year’s supply of the recommended lubricants along with references to equal products of other manufacturers.
4. All special tools and spare parts shall be properly packed and labeled. PART 2 PRODUCTS
2.01 MANUFACTURERS
A. PolyBlend
B. DynaBlend
C. Velodyne
D. No other manufacturers shall be allowed.
2.02 GENERAL
A. Rigidly and accurately anchor all equipment, including pump bases, into position. Furnish and install all necessary foundation bolts, plates, nuts and washers. Anchor bolts shall be of Type
316 stainless steel.
B. Brass or stainless steel nameplates giving the name of the manufacturer, model number, serial number, capacity and other pertinent data shall be attached to each item of equipment.
1. Pump nameplates shall include capacity, head, speed and any other pertinent information.
2. Motor nameplates shall include horsepower, speed, voltage, amperes, service factor and any other pertinent data.
C. Engraved laminated nameplates, giving the name and number of each item of equipment, shall be rigidly fastened to all control panels furnished under this Section. All pushbuttons, selector switches, lights, etc, shall be property labeled such that the function of each component is clearly identified.
D. The material specified herein is intended to be standard equipment of proven ability as manufactured by reputable concerns having experience in the production of such equipment. The equipment furnished shall be designed, constructed, and installed in accordance with best practice and methods and shall operate satisfactorily when installed as shown on the Drawings.
E. All equipment shall be designed and proportioned to have liberal strength, stability and stiffness and to be especially adapted for the intended service.
PART 3 EXECUTION
3.01 PREPARATION
A. All non-machined surfaces shall be prepared and shop primed as specified in Section 09901 as part of the work of this Section.
3.02 INSTALLATION
A. Install polymer system in accordance with manufacturer's instructions and recommendations in the locations shown on the Drawings. Set anchor bolts in accordance with the shop drawing.
3.03 FIELD TESTING
A. The following shall be done by a qualified service man of the manufacturer of the equipment and accessories supplied.
1. Instruction: The manufacturer shall include one day to instruct Owner's personnel in the use, operation and maintenance of all the equipment.
B. If the performance of any item of equipment does not meet the specified requirements, take corrective measures or remove and replace the unit with one which satisfies the conditions specified. A 2-hour operating period of each item of equipment will be required before acceptance. During this 2-hour operating period, supply all power and water necessary.
3.04 WARRANTY
A. Polymer feed system shall be warranted for a period of 1 year from the date of start-up by authorized technician.
B. Damage due to makeup water particulates will not be considered as a warranty defect and will be the responsibility of the owner.
C. In addition, supplier shall warrant the system to operate in accordance with owner’s expectation and performance.
D. If dissatisfied with system performance for any reason, the owner shall have the right to return the system to vendor for a refund of vendor’s sale price any time during the first 30 days following start-up.
END OF SECTION
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