SECTION 11650H DETAIL BIOSOLIDS THERMAL DRYING SYSTEM DRY BULK STORAGE STEEL TANKS

This spec was part of the Des Plaines, IL River WRF project that bid Feb 26, 2015.


SECTION 11650H

DETAIL BIOSOLIDS THERMAL DRYING SYSTEM DRY BULK STORAGE STEEL TANKS


PART 1 GENERAL

1.1 SECTION INCLUDES:

A. Dry Bulk Storage Bolted Steel Tanks:
1. Product Silo Number 1: M-12-5
2. Product Silo Number 2: M-12-8
3. Product Silo Number 3: M-12-11.
4. Vibrating Discharge No. 1: M-12-7.
5. Vibrating Discharge No. 2: M-12-10.
6. Vibrating Discharge No. 3: M-12-13.
7. Load Out Spout No. 1: M-12-6.
8. Load Out Spout No. 2: M-12-9.
9. Load Out Spout No. 3: M-12-12.
10. Product Silo Distribution Conveyor: M-12-4. 11. FV-12-4-1.
12. FV-12-4-2.
13. FV-12-4-3.
14. Dust Collection Fan: M-12-19.
15. Fines Dust Collection Tank: T-12-19.

B. Local Control Panels:
1. Dust Collection Tank Control Panel: 60-LCP-12-4.
2. Silo Control Panel: 60-LCP-12-5

C. Components and appurtenances of each tank including but not limited to:
1. Bolted Steel Roof.
2. Defragtaion Panels.
3. Handrails.
4. Access Stairs.
5. Access Walkways.
6. Instrumentation and Control Equipment

1.2 SYSTEM DESCRIPTION

A. See General Specification Section 11650, Solids Thermal Drying System - General:

B. Furnish and erect bolted RTP (rolled, tapered panel) steel tank for dry bulk storage.

C. Scope to include tank, factory powder coat process and tank appurtenances as shown on the contract drawings and described herein.

D. All required labor, materials and equipment shall be included.

1.3 REFERENCES

A. American Society for Testing and Materials (ASTM):

B. American Welding Society (AWS):

1.4 DESIGN REQUIREMENTS

A. See General Specification Section 11650, Solids Thermal Drying System - General:

B. Tank Size:
1. The epoxy powder-coated bolt together tank shall have a nominal diameter of 25 ft. with a nominal eave height of 52 ft.

C. Tank Capacity:
1. Tank working capacity shall be 7,500 cubic feet based on 30 degree angle of repose.

D. Design Parameters:
1. Material stored: Dryed biosolilds (90% dried solids or greater).
2. Loose density of product: 45 pounds per cubic foot
3. Maximum compacted product density: 70 pounds per cubic foot
4. Product angle of repose: 30 degrees
5. Configuration: Drive-through skirt (14 feet height by 12 foot width).
6. Hopper slope: 60 degrees
7. Hopper outlet size: 120-inches
8. Clearance from foundation to hopper discharge: As required to provide 14’-0” of truck clearance of from bottom of truck loading spout.

E. Design Criteria
1. Governing Code International Building Code 2012 edition.
2. Seismic Loading per Drawing 01-S-2 Building 60-Structural Data.
3. Wind Loading per Drawing 01-S-2 Building 60-Structural Data.
4. Roof Snow Load per Drawing 01-S-2 Building 60-Structural Data.
5. Loads imposed by mass flow pattern
6. Design pressure & vacuum is 0.5 bar positive, 1/2 oz. negative
7. Center fill/center discharge
8. 20 PSF Deck live load
9. Storage of free flowing bio solids
10. Ambient operating temperature

F. Tank Design Standards:
1. The RTP (rolled, tapered panel) bolted tank design shall have lap joint connections on both vertical and horizontal shell seams. American Petroleum Institute (API 12B) flanged panel tank design will not be acceptable.
2. Combined live and dead roof load shall be uniformly distributed with all nozzle, manhole and filter location designed for a minimum of 200 lbs each. Live and dead loads to be combined minimum of 20 psf. Roof to have 1:12 slope for water drainage.
3. Shell and Hopper Design

a. Shell and hopper product pressures are calculated using the technical paper Effect of Solid Flow Properties and Hopper Configuration on Silo Loads, by Jenike, A.W. Jenike and Johanson, Inc. The analysis uses the Janssen formula for defining pressures and load imposed by funnel or mass flow. Radial tension in the shell, from the above mentioned product loads, are from the Design of Steel Bins for Storage Of Bulk Solids, Gaylord and Gaylord, Section 8-2. Loadings in the hopper, from the above mentioned product loads, are from the Design of Steel Bins For Storage of Bulk Solids, Gaylord and Gaylord, Sections 5-12, 8-6.
b. Allowable stresses for carbon steel are per the AISC Manual of Steel Construction. Allowable Stress Design, 9th Edition and ASTM for carbon steel materials. Weld joint efficiencies, where applicable, shall be per ASME Section VIII, Division I, Table UW-12.
c. Shell design is based on the critical buckling formula for a long cylinder from the book Structural Analysis Of Shells, by Baker, Kovalevsky, & Rish. The shell material's critical buckling stress is not allowed to exceed its yield strength.
d. Shell resistance to radial tension from dry product pressure is based on the principles of API 620, Section 3.10 with allowable seam loads based on the principles of AISC.
e. Hopper resistance to tension from dry product pressure is based on the principles of API 620 Section 3.10 with allowable seam loads based on the principles of AISC. The hopper to sidewall connection design is based on the principles of API 620 Section 3.12.
f. Deck sheet design under internal pressure is based on the principles of API 620 Section 3.10 with allowable seam loads based on the principles of AISC. The deck to sidewall connection under internal pressure is based on the principles of API 650.
g. Shell design under vacuum is based on the critical buckling formula from the book Structural Analysis of Shells, by Baker, Kovalevsky & Rish.
h. Sidewall panels shall be RTP (rolled, tapered panel) design, utilizing lap joint panel connections or formed flanged panels.
i. Tank shall be designed for fill and discharge of product as shown on Contract Drawings.
j. Tank design to be based on a level full capacity using the maximum compacted density of the product

1.5 SUBMITTALS

A. See General Specification Section 11650, Solids Thermal Drying System - General:
1. Complete assembly and installation drawings.
2. Descriptive information on material and equipment furnished.
3. Manufacturer's qualifications.
4. Manufacturer’s design calculations.
5. Submit structural calculations stamped by Professional Engineer registered in the State of Illinois for support system.
6. Provide total dead and live loads from tank at each support.

B. Submit certificates of proper installation and operator training under the provisions of DIVISION 1.

C. Submit field test documentation under the provisions of DIVISION 1.

1.6 OPERATION AND MAINTENANCE DATA

A. See General Specification Section 11650, Solids Thermal Drying System - General.

1.7 DELIVERY, STORAGE AND HANDLING

A. See General Specification Section 11650, Solids Thermal Drying System - General.

1.8 QUALITY ASSURANCE

A. See General Specification Section 11650, Solids Thermal Drying System - General.

1.9 EQUIPMENT SUPPLIER'S QUALIFICATIONS:

A. See General Specification Section 11650, Solids Thermal Drying System - General.

1.10 PAYMENT SCHEDULE

A. See General Specification Section 11650, Solids Thermal Drying System – General.


PART 2 PRODUCTS

2.1 ACCEPTABLE EQUIPMENT SUPPLIERS

A. Komline-Sanderson, Peapack, NJ.
1. The contract documents are based on this equipment.

B. Andritz Separation Inc., Arlington, TX.
1. Bidders proposing to offer Andritz Separation as the Equipment Supplier shall incorporate in the price all additional costs for and be responsible for layout, piping, plumbing, mechanical, HVAC, structural, instrumentation and control, electrical, and all other changes to the Work required to incorporate the proposed equipment into the Work.

C. Or Equal.

2.2 GENERAL

A. See General Specification Section 11650, Solids Thermal Drying System – General.

B. All tanks shall all be the end product of manufacturer specializing in the design, fabrication and erection of factory applied epoxy coated, bolt together tank systems. The manufacturer shall be responsible for the complete system including all items covered herein.

2.3 METAL FABRICATION

A. See General Specification Section 11650, Solids Thermal Drying System – General.

2.4 BOLTED STEEL TANKS

A. Acceptable Manufacturers:
1. CST Storage, Lenexa, KS.
2. Tank Connection, Parsons, KS.
3. Or Equal.

B. Materials Of Construction:
1. Plates & Sheets:
a. Design requirements for steel shall be ASTM; A36, A1011 Gr40, A572 Gr50 and Gr60 and A656 Gr70 material.
2. Rolled Structural Shapes:
a. Material shall conform to minimum standards of ASTM; A36, A992 or A53 Grade B material.
3. Bolt Fastners:
a. Bolts used in tank lap joints shall be ½ - 13 UNC-2A rolled thread, and shall meet the minimum requirements of AISC.
b. Bolt Material:
1) SAE Grade 8, tensile strength - 150,000 psi minimum for rolled, tapered panel design, and Grade 5 bolts on flange panel design.
2) Anchor bolts conform to ASTM A36 or A307.
3) Bolt Finish – JS1000 electro-plated.
4. Gasket:
a. The lap joint bolted connections shall utilize EPDM (synthetic rubber) strip gasket for sealing. For high temperature applications (in excess of 230 °F), Viton gasket shall be specified.

C. Factory Epoxy Powder Coat Process:
1. Cleaning:
a. Following the fabrication process, sheets and tank components shall be thoroughly washed and rinsed.
1) Washing shall be with a suitable detergent using such concentrations as recommended for de-greasing steel. Water temperatures will be elevated to improve the effect of the cleaning process.
2) The pH level shall be monitored and maintained according to the range recommended for use by the manufacturer for the cleaning process.
3) Cleaning shall be in a two stage booth. A fresh water rinse shall be used in the second stage of the wash system.
4) All water shall be removed from sheets and tank components with forced air.
2. Surface Preparation:
a. Sheets and tank components shall be blasted on both sides providing an SSPC SP10 (near white blast) surface profile.
3. Powder Coating:

a. Interior Coating: One coat of epoxy powder coat 5 mils nominal dry film thickness (DFT) from 4 to 6 mils average DFT.
b. Exterior Coating:
1) Primer: One coat of epoxy powder coat 3 mils nominal dry film thickness (DFT) from 3 to 5 mils average DFT.
2) Topcoat: One coat of polyester or urethane 3 mils nominal DFT for UV protection.
c. Visual inspection for coverage shall be made after powder application and before the first oven cure. Areas with light coverage shall be re- sprayed with a manual spray gun.
4. Powder Curing:
a. Sheets and tank components shall then be heated in an oven to cause the powder to gel adequately to cross-link with top coat.
b. Visual inspection and dry film test shall be randomly performed before application of top coat.
c. Both visual inspection and dry film test shall be randomly performed before the application of the top coat.
5. Top Coat (Polyester or Urethane):
a. Top coat shall be applied at 3 mils minimum DFT, with a min/max range from 3 to 5 mils avg.
b. The top coat shall provide excellent gloss retention and UV resistance. Color is to be selected from chart consisting of seven standard colors.
c. Visual and mil thickness testing shall be randomly performed before the second oven curing.
6. Final Curing:
a. Sheets and tank components then pass through the final cure oven. Oven settings will be based on the proprietary data provided by the coatings supplier. Oven temperatures vary depending on metal thickness.
7. Inspection:
a. During final cool down, sheets shall be inspected for cure, adhesion, coating thickness and holidays.
b. Cure shall be confirmed using random MEK rub tests.
c. Adhesion shall be confirmed using 100 squares test (ASTM Class 5B).
d. Coating thickness shall be confirmed using dry film thickness gage.
e. Provide 100% panel coating inspection will 1100 volt holiday test.
8. Packaging:
a. After cool down and inspection, the sheets and tank components shall be unloaded and packaged for shipment.
b. Sidewall sheets shall be stacked on wooden skids with paper placed between each sheet to prevent any scuffing. Skids shall be loaded to 5,600 pound maximum weight. Each skid shall be wrapped in heavy mil, black poly reinforced paper and then steel banded.
c. Roof sheets and hopper or bottom sheets as well as other tank components shall be packaged to prevent damage and then wrapped and banded.

D. Tank Structure:
1. Sidewall Structure:

a. Field erection of the epoxy powder-coated, bolted steel tank shall be in strict accordance with the procedures outlined by the manufacturer, using factory trained erectors.
b. Vertical shell support stiffeners shall conform to minimum standards of ASTM A1011 A36 or A992.
c. Particular care shall be taken in handling and bolting of the tank panels and members to avoid abrasion of the coating system.
2. Roof:
a. Epoxy powder-coated steel deck.
1) Tank shall include a sectioned roof fabricated from epoxy powder-coated, bolted steel panels, as produced by the tank manufacturer, and shall be assembled in a similar manner as the sidewall panels. The roof shall be clear-span and self-supporting. Both live and dead loads shall be carried by the tank walls.
3. Hopper:
a. Epoxy powder-coated steel hopper.
1) Tank shall include a sectioned hopper fabricated from epoxy powder-coated, bolted steel panels, as produced by the tank manufacturer, and shall be assembled in a similar manner as the sidewall panels. Hopper shall be self-supporting with full compression bar attachment to tank sidewall.
2) Hopper support stools shall conform to minimum standards of ASTM A1011 A36.
4. Appurtenances:
a. Standard Tank Accessories
1) Foundation anchor bolts
2) Hardware and gasket for assembly of tank
3) Deck manway access
4) Deck perimeter guardrail with toe board (OSHA) - HDG finish
5) Hopper manway access with bolt-on cover
6) Stub and flanged nozzles in deck, sidewall and hopper
7) Manufacturer's nameplate
b. Optional Tank Accessories
1) Product material testing to ensure reliable flow
2) 12' (wide) x 14' (height) truck drive-through openings in skirt
3) Hillside flange in deck for mounting filter.
4) Nozzles/couplings/openings – as required for instrumentation, vent, and nitrogen injection.
5) Complete fill pipe assembly (carbon, stainless steel)
6) TC target box located in tank center dome
7) Deck manway access 20" snap lock.
8) Spiral stairway access to top of tank (OSHA) with intermediate landing - see Contract Drawings.
9) Maintenance platform for each tank to access load out spout and hopper as shown on Contract Drawings with OSHA access ladder.
10) Deflagration panels – provide appropriately sized deflagration panels for the specified dried product.

11) Crossovers for access between tanks (OSHA) – see Contract Drawings.

E. Vibrating Bin Discharge:
1. Equip each silo with a vibrating bin discharger (M-12-7, M-12-10 & M-12-13) to prevent material bridging in conical discharge section.
2. Motors:
a. Furnish motor compatible with the driven equipment herein. Motors shall be furnished as specified in Section 11338, and shall conform to the detailed requirements herein:
1) Motor maximum nameplate horsepower: 6 HP.
2) Type drive: Constant speed.
3) Maximum (synchronous) motor rpm: 1750.
4) Motor mounting: Horizontal.
5) Enclosure: TEFC.
6) Power: 460 volt, 3 phase, 60 Hz.
7) The motor shall have NEMA B starting torque and low starting current. The motor shall not be overloaded beyond the nameplate rating under any normal conditions encountered.
8) Suitable for a Class II, Division 2, Group G environment.
3. Bin Activator and Appurtenances:
a. The bin activator equipment includes all equipment and supports necessary for the operation of the bin activator. This includes, but is not limited to, hangers, sleeves, gyrator, motor, maintenance gate, flexible connections and appurtenances required for a complete installation.
b. One Bin Activator of the vibrating type shall be provided and mounted on the specified diameter opening of the storage bin. The bin activator shall eliminate bridging, jamming , segregation, rat-holing, and shall insure a positive continuous flow of chemicals on a first-in, first-out basis. The bin activator shall have a minimum 8 inch diameter plain opening at the discharge.
c. The Bin Activator shall have a gyrated type hopper with eccentric weights mounted so that vibration is applied perpendicular to the channel flow.
d. The vibrating bottom shall be hung from the bin with rubber-bushed steel hangers and connected to the bins with reinforced butyl sleeve so that no vibrations are transmitted to the bin.
e. Vibration shall be generated by a motor-driven eccentric type oil lubricated gyrator. The bin activator shall run continuously during the feed cycle. The discharge spout shall be fitted with a flex connection suitable for connection to the screw feeder. The activator shall be provided with manufacturer's standard shop finish paint.

F. Solids Storage Outlet Valve:(FV-12-6-1, FV-12-9-1 & FV-12-12-12-1)
1. 14” knife gate valve pneumatically actuated.

G. Truck Loading Spouts (M-12-6, M-12-12-9 & M-12-12):
1. Provide PEBCO, Model DLS-22-8 or equal loading spout.
2. Loading Capacity: 450 CFM.

3. Average air withdrawal: 1,000 CFM.
4. Electrical Requirements:
a. NEC-Area Electrical Classification: Class II, Division 2, Group G.
b. Enclosures: NEMA 9.
5. Cone Construction:
a. Contained inner design with 0.13 AR steel and 0.13 304 stainless steel.
6. Collapsible Fabric Sleeve:
a. Construction: Urethane/nylon fabric.
7. Inlet Connection:
a. 14” raised-face 150-lb flange.
8. 4'-10" retracted height less 18" dust skirt.
9. 8' - 0" of vertical travel.
10. 8" diameter negative air outlet connection.
11. 3/16" thick AR steel inlet cone.
12. Contact parts of 10 gauge carbon steel.
13. Non-contact parts of 12 gauge carbon steel.
14. Internal self-stacking product guide cones of 5/16" thick polyethylene.
15. Roadstar® 18 outer flexible shroud with galvanized reinforcing rings.
16. Lower weldment with neoprene dust skirt.
17. Tilt type level sensor.
18. 3/4 HP gear motor drive, TEFC for 3/60/230/460 VAC.
19. Slack Cable Limit Switch.
20. "Full Up" and "Full Extended" rotary limit switch wired to NEMA 4 junction box.
21. Three galvanized cable hoist, enclosed guard and dust covers.

H. Deflagration Panels:
1. Deflagration protection for the silo and personnel shall be provided by relief panels. The sizing of the panels and duct will be in accordance with NFPA 68 and ASTM-E 1226-10.

2.5 ACCESSORIES

A. Product Silo Distribution Conveyor (M-12-4):
1. Design to receive the dried product exiting the Product Conveyor No. 1 (M-12-1) and convey and distribute it to any one of the three Product Silos.
2. Size per the process requirements of the Drying System per the Design Requirements.
3. Nominal screw diameter: 12”
4. Nominal length: 60 ft.
5. Construct the wetted parts of the conveyor, including the top cover, screw and trough out of 304 stainless steel.
6. Form the trough of the conveyor into a “U” shape.
7. Provide conveyor with a formed flange discharge connections to each silo.
8. Provide the conveyor with bolted and gasketed top covers to provide a dust tight seal.
9. Each section of the conveyor top cover shall be removable for maintenance purposes.

10. Provide conveyor supports to grade constructed out of 304 stainless steel construction, minimum ¼” thickness.
11. Motor:
a. Furnish motor compatible with the driven equipment herein. Motors shall be furnished as specified in Section 11338, and shall conform to the detailed requirements herein:
1) Motor nameplate horsepower: 10HP.
2) Type drive: Constant speed reversing.
3) Nominal (synchronous) motor rpm: 1800.
4) Motor mounting: C-face d to gear reducer.
5) Enclosure: TEFC.
6) Power: 460 volt, 3 phase, 60 Hz.
7) Minimum Service Factor: 1.15.
8) The motor shall have NEMA B starting torque and low starting current. The motor shall not be overloaded beyond the nameplate rating under any normal conditions encountered.
9) Motor to be provided with Klixon bimetal opening contact type overload sensor in each winding.
10) Motor shall be suitable for operation in a Class II Division II Group G hazardous area.

B. Slide Gates (FV-12-4-1, FV-12-4-2 & FV-12-4-3).
1. The conveyor system shall include a slide gate at the location shown on the drawings. The slide gate shall be electro mechanically operated.
2. The slide gate shall be specifically designed to operate as an integral part of the conveyor system, and shall be supplied by the conveyor manufacturer.
3. Electro-Mechanically Operated Slide Gates: The slide gate shall be designed with a maximum vertical dimension of 10" including the electric motor operator. The slide gate shall be designed so that in the full, open position at least one rotation of the spiral is exposed to the opening in the direction of transport. The slide   gate shall have an opening at least the full width of the conveyor. Minimum opening size shall be 10" x 14". The slide gate shall be fabricated entirely of AISI 304 stainless steel and suitable nonmetallic components, all minimum 3/16" thickness. The conveyor manufacturer shall provide electric motor operated gate operator, NEMA 4X or NEMA 7 limit switches to indicate open and closed status, and worm gear motor.
4. Gate Operator Power: 120 volt, 1 phase.
5. Slide gate closed position limit switches with 5 Amp NO & NC contacts.
6. Slide gate open position limit switch with 5 Amp NO & NC contacts.
7. Local Open/Close/Remote Slide Gate control switch and enclosure.
8. All enclosures shall be NEMA 4X or NEMA 7.

C. Dust Collection System:
1. Dust Collection Fan (M-12-19) and Fines Dust Collection Tank (T-12-19).
2. Design Conditions
a. Airflow: 1,000 CFM, -8” WC
b. Housing Rating: -40" WC
c. Temperature: 60°- 90° F
d. Area Classification: Class II, Division 2, Group G.

3. One Pollution Control System designed to include the following:
a. Provide United Air Specialist, Inc. Model SFC 6-3 Dust Collector or equal.
b. Filter media: nanofiber.
c. Minimum filter area: 510 ft2.
d. Mild steel construction epoxy-coated exterior.
e. 1.96:1 air-to-media ratio.
f. Air inlet.
g. 45 degree sloped hopper.
h. Explosion vent mounted on side of collector.
i. Explosion vent weather cover.
j. Drum lid latch kits with flex and lid cover.
k. 120VAC solenoids in a NEMA 4 enclosure.
l. DPC digital pulse controller with digital Photohelic in a NEMA 4 enclosure.
m. Direct drive backward inclined fan.
n. Manual adjustable damper valve.
o. Fan silencer.
4. Motors:
a. Furnish motor compatible with the driven equipment herein. Motors shall be furnished as specified in Section 11338, and shall conform to the detailed requirements herein:
b. Fan Motor:
1) Motor maximum nameplate horsepower: 3 HP.
2) Type drive: Constant speed.
3) Maximum (synchronous) motor rpm: 1750.
4) Motor mounting: Horizontal.
5) Enclosure: TEFC.
6) Power: 460 volt, 3 phase, 60 Hz.
7) The motor shall have NEMA B starting torque and low starting current. The motor shall not be overloaded beyond the nameplate rating under any normal conditions encountered.
8) Suitable for a Class II, Division 2, Group G environment.
c. Rotary Valve Motor:
1) Motor maximum nameplate horsepower: 1/2 HP.
2) Type drive: Constant speed.
3) Maximum (synchronous) motor rpm: 1750.
4) Motor mounting: Horizontal.
5) Enclosure: TEFC.
6) Power: 460 volt, 3 phase, 60 Hz.
7) The motor shall have NEMA B starting torque and low starting current. The motor shall not be overloaded beyond the nameplate rating under any normal conditions encountered.
8) Suitable for a Class II, Division 2, Group G environment.
5. Product Contact Parts of 10 gauge carbon steel.
6. Low profile filter design for compact installation constructed of reinforced 14 gauge carbon steel with sixteen cellulose cartridges.
7. Filter shall be cleaned using reverse air pulse cleaning with, 90 PSIG clean, dry compressed air.

8. Filter shall be mounted to the silo to provide clean-side access to filter cartridges for ease of service and inspection.
9. Filter shall be fully assembled will discharge fan and rotary valve, skidded and crated for ease of installation. Cartridges shall be shipped loose for field installation.
10. Provide transition piece in painted mild steel materials to transition from the filter unit to its discharge rotary valve.
11. Each filter shall include an intrinsically safe differential pressure switch (DPS- 12-19) to control jet pulse compressed air cleaning.
12. Piping from truck loading spout and filter shall be furnished by manufacturer and installed by Contractor.

2.6 FINISHING

A. Shop and Field Painting of items other than the tank: Conform to Section 09900, System No. 6. Verify compatibility of shop prime and field paint.

2.7 ELECTRICAL

A. See General Specification Section 11650, Solids Thermal Drying System – General.

B. Provide a grounding pad on each silo and the stairs to the top of the silos that is suitable to accept a #3 AWG ground conductor that can be connected either by exothermic weld (CAD WELD), or mechanically (pad would include a large threaded post to accept a ring terminal that the Contractor CAD WELDS to the conductor). Locate silo ground pads on the east side of the silos at grade.

2.8 INSTRUMENTATION AND CONTROLS

A. Control panels and controls shall be furnished in accordance with Division 13 and Division 16, Contract Drawings 09-I-22 and 09-I-23, and shall conform to the requirements herein.

B. Provide local-mounted pendent type control stations for each Silo:
1. Enclosure/Switch: NEMA 7X/rated for Class 1 Division 1 environment.
2. Switches:
a. Load Start/Load Down pendant station for Silo 1.
b. Load Start/Load Down pendant station for Silo 2.
c. Load Start/Load Down pendant station for Silo 3

C. Control Panel 60-LCP-12-4 and 60- LCP-12-5 construction requirements:
1. Enclosure: NEMA 4X stainless steel.
a. Provide Hoffman enclosure, or equal.
b. Built in accordance with specification section 13325.
c. Components in accordance with specification section 13326.
2. Provide single panel disconnect with panel protection.
3. For 60-LCP-12-5, provide an Allen Bradley MicroLogix 1400 series PLC controller with Ethernet port for interface to plants central SCADA system via the Biosolids Dryer Control Panel 60-LCP-11-1. Provide programming for

transmission of local input and output signals to the Biosolids Dryer Control Panel 60-LCP-11-1.

D. Control Panel 60-LCP-12-4 interface and functional requirements:
1. Control panel shall be mounted near FINES/DUST TANK.
2. Panel shall control tanks high pressure air solenoids, based on input form D.P. Pressure switch DPS 12-19.
3. Panel shall pervade following interface signals to and from 60-LCP-11-1 Biosolids Dryer Control Panel.
a. Start Signal Input.
b. High Differential Pressure Signal Output.

E. Control Panel 60- LCP-12-5 interface and functional requirements:
1. Control panel shall be mounted near the Silos.
2. Panel shall receive instrumentation input information from the each silos tank monitoring instrumentation and transmit data to Biosolids Dryer Control Panel 60-LCP-11-1 for monitoring, control and alarming. Provide the following Instrumentation as a minimum:
a. Furnish each silo with one intrinsically safe pressure transmitter to monitor internal silo pressure and prevent vacuum conditions. Pressure Transmitter (PT-12-5, PT-12-8 & PT-12-11).
b. Furnish each silo with on intrinsically safe high level switch to monitor the high level of dried product in the silo. Level Switch High (LSH-12-5, LSH-12-8 & LSH-12-11).
c. Each silo shall be furnished with intrinsically safe temperature transmitters (IT-12-5, TT-12-8 and TT-12-11) in the silo wall and roof to continuously monitor the internal temperature of the dry granules. Should temperature increase above a maximum, temperature alarms shall be activated through the plant SCADA. CO Indicator Transmiter (AIT- 12-5, ATI-12-8 & ATI-12-11).
d. Each storage silo shall be furnished with one intrinsically safe radar level sensor and transmitter. Sensor shall be mounted in the respective Silo. The cable between each sensor and its respective transmitter shall also be supplied. Level Transmitter (LT-12-5, LT-12-8 & LT-12-11).
3. Provide the following input devices as a minimum:
a. Local-mounted pendent type control stations for each Silo. HS-12-6-1 Load Start/ HS 12-6-2 Load Down pendant station for Silo 1. HS-12-9-1 Load Start/ HS 12-9-2 Load Down pendant station for Silo 2. HS-12-12- 1 Load Start/ HS 12-12-2 Load Down pendant station for Silo 3. (Enclosure/Switch shall be rated for NEMA 7X/rated for Class 1 Division 1 environment.
b. Load out Pneumatic Operator Open/Close Position Switch for each Silo. ZS 12-6-1 for Silo 1, ZS 12-9-1 for Silo 2 and ZS 12-12-1 for Silo 3.
c. Load out Spout Tilt Position Switch for each Silo. ZS 12-6-2 for Silo 1.ZS 12-9-2 for Silo 2.ZS 12-12-2 for Silo 3.
d. Load out Spout Cable Tension Position Switch for each Silo. ZS 12-6-3 for Silo 1.ZS 12-9-3 for Silo 2.ZS 12-12-3 for Silo 3.
e. Load out Spout Up/Down Position Switch for each Silo. ZS 12-6-4 for Silo 1.ZS 12-9-4 for Silo 2.ZS 12-12-4 for Silo 3.

f. Load out Pneumatic Open/Close/Remote Local Control Switch HS-12-6- 1 in Remote position for Silo 1. Load out Pneumatic Open/Close/Remote Local Control Switch HS-12-9-1 in Remote position for Silo 2. Load out Pneumatic Open/Close/Remote Local Control Switch HS-12-11-1 in Remote position for Silo 3.
4. Provide the following output devices as a minimum:
a. Silo Top Nitrogen input valve control solenoid FV-12-5-1 for Silo 1. FV- 12-8-1 for Silo 2. FV-12-11-1for Silo 3. (Enclosure shall be rated for NEMA 7X/rated for Class 1 Division 1 environment.)
b. Silo Side Nitrogen input valve control solenoid FV-12-5-2 for Silo 1. FV-12-8-2 for Silo 2. FV-12-11-2 for Silo 3. (Enclosure shall be rated for NEMA 7X/rated for Class 1 Division 1 environment.)
c. Load out Pneumatic Operator Open Command signal to FV-12-6-1 for Silo 1. Load out Pneumatic Operator Open Command signal to FV-12-9- 1 for Silo 2. Load out Pneumatic Operator Open Command signal to FV- 12-12-1 for Silo 3.
d. Load out Pneumatic Operator Close Command signal to FV-12-6-1 for Silo 1. Load out Pneumatic Operator Close Command signal to FV-12-9- 1 for Silo 2. Load out Pneumatic Operator Close Command signal to FV- 12-12-1 for Silo 3.
e. Dust Collection Pneumatic Valve Open signals for Silo 1 FV-12-6-2, Silo 2 FV-12-9-2 and Silo 3 FV-12-12-2.

F. Other Functional Requirements:
1. The controls shall provide complete control of the Product Silos loading as shown on project P&IDs.
2. Manual resetting of the system shall not be required in the event of a power outage.
3. Panels shall be provided with all factory standard equipment and personnel safety features and interlocks.


PART 3 EXECUTION

3.1 INSTALLATION

A. Install in accordance with the Drawings, shop drawings, and manufacturer's instruction.

B. Field erection of the bolted steel tank will be in strict accordance with manufacturer's procedures using factory trained and certified erectors.

C. Particular care will be taken to protect the baked-on powder coated panels from damage (i.e., scratches, abrasion) during field installation.

D. Tank to be erected by factory provided erectors, including all scaffolding, labor and tools required.

E. Any coating damage will be repaired per manufacturer's recommendations.

3.2 FIELD TESTING

A. Exterior water spray test to be conducted per manufacturer's procedure.

B. Smoke testing may be conducted in lieu of exterior water spray test, when applicable.

3.3 MANUFACTURER'S SERVICES

A. See General Specification Section 11650, Solids Thermal Drying System - General.

B. Minimum Service Requirements:
1. Installation: As required for proper installation.
2. Start-up and functional testing: Two (2) eight hour days on site.
3. Operator training: One (1) eight hour day on site.
4. Post start-up training: One (1) eight hour day onsite.

C. Service to Repair Defective Work: Provide during one-year warranty period under the provisions of General Conditions.


END OF SECTION