VA 22 67 21-2011 WATER DEALKALIZING SYSTEM.pdf
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1、02-11 22 67 21 - 1 SECTION 22 67 21 WATER DEALKALIZING SYSTEM SPEC WRITER NOTES: 1. Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. 2. Consider utilizing a reverse osmosis system (RO) instead of a sof
2、tener and dealkalyzer. A major advantage of RO is reducing the dissolved solids and thus the boiler blowdown. Refer to Section 22 67 19.16 REVERSE-OSMOSIS WATER EQUIPMENT. PART 1 - GENERAL 1.1 DESCRIPTION Provide a chloride anion, pressure type, water dealkalizing system, complete, ready for operati
3、on, including electrical connections, services, controls, and all required accessories and equipment. 1.2 RELATED WORK A. Section 13 05 41, SEISMSIC RESTRAINT FOR NON-STRUCTURAL COMPONENTS. B. Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING. C. Pipe Insulation: Section 23 07 11, HVAC, PLUMBING, A
4、ND BOILER PLANT INSULATION. D. Division 26, REQUIREMENTS FOR ELECTRICAL INSTALLATION E. SECTION 22 08 00, COMMISSIONING OF PLUMBING SYSTEMS. Requirements for commissioning, systems readiness checklist, and training. 1.3 QUALITY ASSURANCE A. Water Analysis: Water to be treated is reported to have an
5、alkalinity as CaC03 of_ mg/L (_ ppm) and a pH of _. / This analysis is for assistance only. Obtain and verify the analysis /. B. Performance Requirements: Provide written certification that the following performance requirements will be met by equipment under actual operating conditions: 1. Exchange
6、r material shall not wash out of the apparatus during any dealkalizing run regardless of rate of flow. 2. Turbidity and color of treated water shall not be increased above same of sodium cycle treated water by reason of passing through the exchanger equipment. 3. Strainer system, gravel bed, and exc
7、hange material shall not become fouled by dirt, rust, or scale from pipe lines to the extent to render backwash ineffective. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 22 67 21 - 2 C. System Requirements: 1. Unit shall be capable of delive
8、ring water having a maximum alkalinity of 20 mg/L (20 ppm), as CaC03, up to maximum demand of _ L/min (_ gpm). 2. Total loss of head through unit, and assembly, between the gages, including dealkalizer, valves, piping, etc., shall not exceed 100 kPa (15 psi). 3. Regeneration shall be accomplished wi
9、thin a period of 75 minutes. Regeneration period shall be that part of cycle of operation from the time unit has delivered its dealkalizing capacity until it is ready to deliver dealkalized water again, including all backwashing, brining and brine washout, etc., complete. Amount of salt necessary to
10、 completely recondition unit after a capacity run, shall not exceed 64 kg per cubic meter (4 pounds per cubic foot) of exchange material. Quantity of caustic soda shall be approximately one tenth of salt employed. D. Required Technical Services: Provide services of a qualified manufacturers represen
11、tative to check complete installation for conformance to manufacturers recommendation, put system into service, make adjustments required for full conformance to design and specified requirements, and test per Part 3 of this section of the specifications. 1.4 SUBMITTALS A. Submit in accordance with
12、Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Manufacturers Literature and Data: 1. Piping 2. Valves 3. Dealkalizing System 4. Controls 5. Pressure Gages 6. Backflow Preventer 7. Water meter 8. Caustic pump 9. Water Testing Equipment C. Completely detailed layout, setting, arrangeme
13、nt, and installation drawings including electrical/hydraulic controls. Drawings shall also show all parts of the apparatus including relative positions, dimensions, sizes, required clearances for unobstructed operation and general arrangement of connecting piping. D. Certification of performance req
14、uirements. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-02-11 22 67 21 - 3 E. ASME U-form tank construction form. F. Field performance test results. G. Completed System Readiness Checklist provided by the Commissioning Agent and completed by the c
15、ontractor, signed by a qualified technician and dated on the date of completion, in accordance with the requirements of Section 22 08 00 COMMISSIONING OF PLUMBING SYSTEMS. 1.5 APPLICABLE PUBLICATIONS A. The publications listed below form a part of this specification to the extent referenced. The pub
16、lications are referenced in the text by the basic designation only. B. American Society of Mechanical Engineers (ASME): B16.1-98Cast Iron Pipe Flanges and Flanged Fittings B16.3-98Malleable-Iron Threaded Fittings B40.100-98Pressure Gauges and Gauge Attachments C. ASTM International Standards(ASTM):
17、A53/A53M-04bPipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless E1229-93(2002)Calcium Hypochlorite E1120-97(2002)Liquid Chlorine D. American Water Works Association (AWWA): C-651 - 05 .Disinfecting Water Mains SPEC WRITER NOTE: Make material requirements agree with applicable requirem
18、ents specified in the referenced Applicable Publications. Update and specify only that which applies to the project. PART 2 - PRODUCTS 2.1 EXTERNAL DEALKALIZER PIPING A. Pipe: ASTM A53, galvanized, schedule 40. Flanges, ASME B16.1, Class 125. B. Fittings: Malleable iron, ASME B16.3 or coated iron, A
19、SME B16.1, Class 125. C. Threaded Joints: Shall be made with ends reamed out. Apply bituminous base lubricant or fluorocarbon resin tape to threads only. 2.2 VALVES A. Manual Valves: Ball, bronze body, stainless steel trim, reinforced Teflon seat and seal, full port. B. Multiport or Valve Nest: wate
20、r-pressure-operated assembly of non-sticking, non-leaking, hard-anodized polymer-coated aluminum alloy or cast iron multi-port diaphragm valves. Guided-perimeter diaphragms. All valve parts accessible for service. Design shall permit slow opening and Provided by IHSNot for ResaleNo reproduction or n
21、etworking permitted without license from IHS-,-,-02-11 22 67 21 - 4 closing automatic operation of various steps of operating service, opening and closing ports in correct sequence. Provide sample cocks. Provide inlet and outlet pressure gages at all valve ports. 2.3 DEALKALIZING SYSTEM A. Vertical,
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