SECTION 14550B DETAIL SHAFTLESS SCREW CONVEYORS SPECIFICATION CAKE SOLIDS CONVEYOR NO. 3 & 4

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


SECTION 14550B

DETAIL SHAFTLESS SCREW CONVEYORS SPECIFICATION CAKE SOLIDS CONVEYOR NO. 3 & 4


PART 1 GENERAL

1.1 SECTION INCLUDES:

A. Shaftless Screw Conveyors:
1. Cake Solids Conveyor No. 3: M-8-4-3.
2. Cake Solids Conveyor No. 4: M-8-4-4.

B. Major components included, but not limited to:
1. Spiral flighting.
2. Troughs and Liners.
3. Chutes.
4. Covers.
5. End Shaft.
6. Motor Reducer.
7. Mounting and Support Structure.
8. Electrical Controls.
9. Safety Accessories.

1.2 SYSTEM DESCRIPTION

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

1.3 REFERENCES

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

1.4 DESIGN REQUIREMENTS

A. General Requirements:
1. Design to collect dewatered sludge cake from its respective Cake Solids Conveyor No. 1 or 2 and convey to the inlet of Cake Solids Conveyor No. 5 or 7 as shown on the Drawings.
2. Capacity per conveyor, (cu ft/hr): 333.
3. Capacity per conveyor, (lbs/hr): 20,000.
4. Material Density, (lbs/cu ft): 60.
5. Maximum filling factor for each conveyor at maximum loading: 5030%.
6. Minimum flight outside screw diameter, inches: 12.44" horizontal; 11.4" vertical.
6.7. Minimum pitch, inches: 14.
7.8. Minimum spiral weight, lbs/ft: 21.723.5.

B. Specific Requirements:

1. Incline: 50°.
2. Length: As shown on drawings.
3. Number of inlets per conveyor: 1.
4. Number of outlets per conveyor: 12.
5. Number of actuated gates per conveyor: 1.
6. Maximum Sscrew speed, rpm: 1420.
7. Minimum trough width, inches: 1415.
8. Minimum drive horsepower: 5 hp hp.
9. Location of drive: Outlet.
10. Non-Reversing screw.
11. Trough bottom drain size, inches:  4. inch

C. Design Guarantee Summary:
1. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

D. Design Calculations:
1. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

1.5 SUBMITTALS

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

1.6 DELIVERY, STORAGE AND HANDLING

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

1.7 MANUFACTURER'S QUALIFICATIONS:

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.


PART 2 PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

2.2 GENERAL

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

2.3 METAL FABRICATION

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

2.4 MATERIALS OF CONSTRUCTION:

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS – GENERAL.

2.5 EQUIPMENT

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS – GENERAL.

2.6 ACCESSORIES

A. Slide Gates (FV-8-8-3 & FV-8-8-4).
1. The conveyor system shall include slide gates at locations shown on the drawings. Each slide gate shall be electro mechanically operated.
2. The slide gates 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 gates shall be designed with a maximum vertical dimension of 10" including the electric motor operator. The slide gates 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 gates shall have an opening at least the full width of the conveyor. Minimum opening size shall be 10" x 14". The slide gates 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 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.

2.7 FINISHING

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

2.8 INSTRUMENTATION AND CONTROLS

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

PART 3 EXECUTION

3.1 INSTALLATION

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.

3.2 MANUFACTURER'S SERVICES

A. See General Shaftless Screw Conveyor Specification Section 14550, SHAFTLESS SCREW CONVEYORS - GENERAL.


END OF SECTION