Z -- REPLACE BOILER PLANT COMBUSTION CONTROLS AND INSTRUMENTS

Notice Date

August 20, 2001

Contracting Office

Veterans Affairs Medical Center, Acquisition & Materiel Management Service, 1898 Fort Rd, Sheridan, WY 82801

ZIP Code

82801

Solicitation Number

666-01-102

Response Due

September 17, 2001

Point of Contact

Jim Wiltse (307) 672-1679 -- Bob Longhini (307) 672-1671

E-Mail Address

Click here to contact the Contracting Officer via (James.Wiltse@med.va.gov)

Description

This modification is issued to change the due date for receipt of offers made in the original notice dated May 21, 2001. The corrected due date for receipt of offers is September 17, 2001. The cost range is $250,000 -- $500,000. The scope of work is as follows: Introduction: 1. The boiler plant consists of three steam boilers operating at 110 psig. During high load periods two boilers operate simultaneously. Boilers 1 and 2 are 1948 vintage 18,500 pph Union Iron Works field-erected cross drum coal-burning water tube boilers with Hoffman "Firite" spreader stokers and shaker grates. Boiler 3 was built in 1986 and is a Keeler "CP" 10,000 pph longitudinal drum unit with a Faber natural gas/No.2 oil forced draft burner with flue gas recirculation. Boiler 3 had been designed for coal firing as well but this has been discontinued. A mechanical dust collector and induced draft fan discharging into a tall stack serves Boilers 1 and 2. A second induced draft fan discharging into a stub stack serves Boiler 3 (no dust collector). 2. The existing combustion controls are Westinghouse-Hagan pneumatic type installed in 1986. The recorders are Westinghouse-Hagan "Ring Balance" type, also installed in 1986. Repair parts are difficult or impossible to obtain for this equipment. This equipment is housed in a free-standing panel. Scope of Work: 1. Combustion Controls: Provide new parallel-positioning combustion controls on Boilers 1 and 2 and new single-point positioning controls on Boiler No. 3. Please refer to the Westinghouse-Hagan logic diagram which is attached for guidance. The requirement is to duplicate the logic of the existing Hagan installation by replacing with microprocessor-type multiloop controllers. The existing panel-mounted Hagan control stations include: plant master, a master for each boiler, a forced draft damper for Boilers 1 and 2, a fuel/air ratio for Boilers 1 and 2, an outlet damper for each boiler, a feedwater valve for each boiler. In addition, there are control stations for the steam header exhaust vent pneumatic control valve, the Boiler 1 and 2 induced draft fan inlet damper. 2. Burner Management (Flame Safeguard) Control: Replace existing control (programmer, amplifier, scanner, annunciator) on Boiler No. 3. 3. Replace the existing boiler feedwater valves, pneumatic actuators and controllers. Provide dual-element control systems for each boiler. 4. Instruments: Replace with state-of-the-art equipment all functions now being provided on the existing Westinghouse Hagan instrument and control panel. Replacement of the panel with a smaller panel is also required. The existing instruments include nine Hagan circular chart recorders as follows: 1) Boiler 1, steam flow, air flow, stack temperature; 2) Boiler 2, same; 3) Boiler 3, same ; 4) Boiler 1, drum level, oxygen, opacity; 5) Boiler 2, same; 6) Boiler 3, same; 7) In house steam, laundry steam; 8) Hospital steam flow; 9) Steam header pressure, outside air temperature, feedwater temperature. Replace these recorders with paperless type recorders with one recorder with six inputs for each boiler and one recorder with six inputs for all other functions (total of four recorders). Do not provide the opacity function. 5. Replace existing laundry utility services recorder now located on separate instrument panel. This recorder shall include steam flow rate and totalization, KWH, and water gallons totalization. 6. Provide new sensors and transmitters for all control and instrument functions. 7. Provide new orifice plates for the boiler steam flow recorders and replace existing orifice plates on all other steam flow functions with new vortex shedding meters. 8. New flue gas oxygen analyzers are required for each boiler. 9. Relocate the following existing controls and instruments from the existing panel to the new instrument panel: I.D. fan stop-start station with ammeter, feedwater pumps 1 and 2 stop-start stations with ammeter, Boiler 1 and 2 forced draft fan stop-start stations with ammeter, Boilers 1, 2, 3 grate shaker timer, draft gages for the scrubber and Boiler 1 and 2. 10. Provide new multipoint annunciator on instrument panel. Provide all alarm points that are now on the existing annunciator plus low flue gas oxygen alarms for all boilers. 11. A variable frequency drive with manual controls is required for the spreader stoker motor (1-1/2 hp) on each of the two coal fired boilers. 12. On the Boiler 1 and 2 dust collector, provide a variable frequency drive for the 30 hp induced draft fan motor. Provide control system to maintain constant draft in dust collector. 13. On the Boiler 1 and 2 dust collector, provide 4 electric drive units (actuators) (2 on the inlet dampers, one on the bypass damper, one on the ID fan inlet). These replace existing drive units. 14. Replace existing pneumatic drive unit on the coal chute with a new pneumatic unit. 15. Replace existing pneumatic drive unit on the Boiler 3 jackshaft with a new pneumatic unit. 16. Provide electronic water level control systems including control valves for the deaerator and the condensate storage tank. Locate controllers on main instrument panel. Remove existing controls and control valves. 17. Provide new remote drum level indicators for Boilers 1, 2, 3. Locate on main instrument panel. 18. Provide new modulating steam flow control valve and pneumatic actuator for the steam header exhaust line. 19. Provide all work necessary to place all systems in proper operation and demonstrate same to owner. JCS 183A 7/6/01 VA Contacts: Jim Wiltse, Contracting Officer, VA Medical Center Sheridan, WY, 307-672-1679. FAX 307-672-1901. Lee Harrelson, Director of Facilities, VA Medical Center, Sheridan, WY, 307-672-1670; FAX 307-672-1901 Jim Shoemaker, VA Headquarters, Mechanical Engineer, 202-565-5176; FAX 202-565-5478

Record

Loren Data Corp. 20010822/ZSOL001.HTM (W-232 SN50V423)