Glycol Powered Pumps

Glycol powered pump. Close the dry discharge valve and see if the pump continues to run if so, the pump needs to be repaired. 

Traps in the wet glycol power piping send alternate slugs of glycol and gas to the pump. 

The process flow schematic in Figure 8-6 shows electric motor driven glycol pumps. On smaller systems it is common to use glycol powered pumps. These pumps use the energy contained in the rich (wet) glycol to... 

Figure 8 19. Glycol powered pump—piston moving to left. (Source Kimroy, Inc.]...

Glycol powered pumps are inexpensive and easy to repair in the field. They have many moving parts and because of their slamming reciprocating motion require constant attention. One spare pump should always be installed. 

Most glycol dehydration plants employ a flash tank to remove hydrocarbons from the rich glycol. The amount of hydrocarbons present depends primarily upon absorber conditions (pressure and temperature), feed gas composition, and whether or not a glycol-powered pump is used. The solubility of a typical natural gas in TEG and DEG is shown in Figure 11-27. A commonly used value for natural gas solubility in TEG is I scf/gal at 1,000 psig and KX)°F (Manning and Wood, 1991). A higher quantity is absorbed if the gas contains appreciable amounts of heavy hydrocarbons, particularly aromatics. 

ESO VLT/Max Planck CW Dye Laser. The MPI is developing a CW dye laser for deployment on one ESO 8-m VLT telescope in 2004 (Eig. 13). The oscillator is a Coherent 899 ring dye laser, with a 2-5 W output, pumped by a 10 W, Coherent Verdi frequency-doubled Nd YAG laser. The beam is amphfied in a four-pass amphfier with 4 high velocity dye jets pumped with 4 10 W Verdi lasers. The system utihzes Rhodamine 6G in ethylene glycol however, because of the high pump power, the dye degrades quickly, and must... 

In Fig. 4.6 a scheme of cooling circuit related to FCS for automotive application is shown. The main components are the pump for liquid circulation, the water reservoir and the heat exchanger with fan. For small size stacks (from 100 to 500 W) it is possible to use only air forced by fan to cool directly the stack, while for higher powers, more suitable for automotive requirements (1-100 kW), it is reasonable to use an internal coolant circuit fed by a liquid, such as de-ionised water or ethylene glycol-water mixtures, to improve the heat removing capacity of an order of magnitude with respect to the gas. 

Booy ML (1963) Influence of Channel Curvature on Flow, Pressure Distribution and Power Requirements of Screw Pumps and Melt Extmders, Soc Plastics Engrs Trans., 3 pp 176. Cameiro OS, Covas JA et al (2000) Experimental and theoretical study of twin-screw extrasion of polypropylene. J Appl Polym Sci 78(7) 1419-1430 Che D, KotipaUi U et al (2010) Atorvastatin calcium propylene glycol solvates, USPTO Crowley MM, Zhang F et al (2007) Pharmaceutical applications of hot-melt extrusion part I. Drug Dev Ind Pharm 33(9) 909-926... 

Energy exchange pumps are extremely popular in the design of glycol dehydration systems. These pumps are low-cost items and require no electrical power. In most remote locations, availability of electrical power is a problem, and the general emphasis is to reduce power consumption. For such plant locations, energy exchange pumps are widely used. 

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