초록 ▼

The present invention relates to a method for automatically maintaining the concentration of scale forming minerals in boiler water for boiler systems utilizing bimodal feedwater pumps that deliver a substantially constant feedwater flow to the boiler drum when activated. According to the present in

The present invention relates to a method for automatically maintaining the concentration of scale forming minerals in boiler water for boiler systems utilizing bimodal feedwater pumps that deliver a substantially constant feedwater flow to the boiler drum when activated. According to the present invention, the feedwater supply pump and blowdown rate control valve are synchronized to remove boiler water at a predetermined rate when the feedwater pump is activated. The present invention thereby provides a simplified and less expensive method for controlling the concentration of dissolved solids in boiler water despite variations in the steam loads and/or other boiler operation parameters.

대표청구항 ▼

The present invention relates to a method for automatically maintaining the concentration of scale forming minerals in boiler water for boiler systems utilizing bimodal feedwater pumps that deliver a substantially constant feedwater flow to the boiler drum when activated. According to the present in

The present invention relates to a method for automatically maintaining the concentration of scale forming minerals in boiler water for boiler systems utilizing bimodal feedwater pumps that deliver a substantially constant feedwater flow to the boiler drum when activated. According to the present invention, the feedwater supply pump and blowdown rate control valve are synchronized to remove boiler water at a predetermined rate when the feedwater pump is activated. The present invention thereby provides a simplified and less expensive method for controlling the concentration of dissolved solids in boiler water despite variations in the steam loads and/or other boiler operation parameters. the shank. 13. The method of claim 12, wherein the working tip is insert molded in the second end of the shank. 14. An insulating hand tool comprising: an elongated torque-transmitting shank formed of high-strength, injection-molded, electrically insulating material and having a handle end and a working end, a handle formed of electrically insulating material and carried by the handle end of the shank, and a working tip having a mounting portion fixed in the working end of the shank and a work-engaging portion projecting from the working end of the shank, the mounting portion including an anchor portion having a radius tapering from a maximum radius to a minimum radius and angularly spaced flutes each having a maximum radial depth which is a substantial portion of the maximum radius, the flutes being substantially filled with material of the shank. nal function to hypotonic medium in winter flounder," J. Comp. Physio. B157:21-30 (1987). Bai, M., et al., "Expression and characterization of inactivating and activating mutations in human CA2+Sensing Receptor," J. Biol. Chem., 32:19537-19545 (1996). Evans, D.H., "Osmotic and Ionic Regulation," Chapter 11 in The Physiology of Fishes, (CRC Press, Boca Raton, FL) pp. 315-341 (1993). Prunet, P., et al., "Effects of growth hormone on gill chloride cells in juvenile Atlantic salmon (Salmo salar)," Am. J. Physiol., 266:R850-R857 (1994). Naito, T. et al. "Putative pheromone receptors related to the Ca2+-sensing receptor in Fugu," Proc. Natl. Acad. Sci., 95:5178-5181 (Apr. 1998). Hew, C.L., Antifreeze Protein Gene Transfer in Atlantic Salmon, Molecular Marine Biology and Biotech., 1(4/5): 309-317 (1992). Ryba, N.J., et al., "A New Multigene Family of Putative Pheromone Receptors," Neuron, 19(2):371-379 (1997). Yamaguchi, Toru, et al., "G Protein-Coupled Extracellular Ca2+(Ca2+o.)-Sensing Receptor (CaR): Roles in Cell Signaling and Control of Diverse Cellular Functions." In Advances in Pharmacology, Hormones and Signaling, Bert w. O'Malley, et al., eds. (Academic Press) 48: 209-253 (2000). Zaidi, M., et al., "Emerging insights into the role of calcium ions in osteoclast regulation," J. Bone Miner Res., 14: 669-674 (1999). Mykles, Donald L., "Proteolytic Processes Underlying Molt-Induced Claw M