Water circulation systems

The HILL-SCAN 30XX boards can be used in different PCs. Desktop- and tower-PCs as well suited for laboratory uses. For in-field inspections rugged notebooks and portable PCs are advantageous. A typical portable system is shown in Fig. 2 (USPC 3010), used in MUSE (Mobile Ultrasonic Equipment). This portable PC not only contains the boards for ultrasonic testing but also a controller with power supply for stepper motors, so that a manipulator can be connected directly. The MUSE system is enlarged with a water circulation system which enables a local immersion technique" for in-field inspections. A typical result is shown in Fig. 3, which presents a D-scan of a CFRP- component in RTM-techniques. The defect area caused by an impact is clearly indicated. The manipulator is described in [3]. 

The first two sections also contain part of the steam-water circulation system (which includes all boiler surfaces, such as drums, tubes, and shells). Figure 2.4 shows the first two sections and some of the major WT boiler components. 

NOTE Although superheater, reheater, and economizer heat exchangers all contain either steam or water in their respective tube bundles, they generally are not considered by boiler engineers and designers to be part of the steam-water circulation system s boiler surfaces. This distinction typically is reserved for the various tubes, connecting headers (manifolds), and drums that collectively provide the primary heat transfer and steam-generating facility. 

Within the boiler, subsystems include a steam-water circulation system and a steam delivery system. 

A diagram of a WT boiler steam-water circulation system is shown in Figure 2.5. 

The boiler steam-water circulation system is designed to promote the delivery of steam from the various generating tubes to the boiler steam drum (top drum). From here the steam is separated from the BW and transferred to the steam delivery system for possible superheating and subsequent use in a turbine generator or other downstream process application. 

NOTE The downcomers, although part of the boiler steam-water circulation system, are located outside the boiler so that theFW-BW mixture flowing within the downcomers remains cool relative to the steam-BW. Thus, density differences remain and natural circulation continues. 

The various tubes, connecting headers (manifolds), and drums within the steam/water circulation system that collectively provide primary heat transfer and steam generation. 

Water circulation systems, where groundwater is pumped, oxygenated in surface installations and reinjected in the contaminated aquifer... 

A typical water circulation system is presented in Figure 14.5. Groundwater is pumped to the surface from a well, which is located downgradient of the contaminated zone, and directed to an... 

A continuous oxygen supply is thus achieved, which is limited only by the mass transport phenomena between the gas and aqueous phases this is the main advantage of air sparging over the alternative of water circulation systems. 

From your prior analysis of pumping requirements for a water circulating system, you have determined that a pump capable of delivering 500 gpm at a... 

After commissioning, a lead-in period of 1 to 2 weeks is required before the biological mat has formed in the packing. The scrubber must not be allowed to run dry, i.e. the water circulating system must continue to operate after the fans have been switched off. 

The salt water circulating system proved to be one of the most troublesome problems, because of rust build-up in the recirculating system. However, this was solved by pumping the sea water through only once. The sea water is pumped from a 5-gallon glass bottle by a Milton Roy stainless steel positive-displacement, variable-volume pump which has a maximum capacity of 1.1 gallons per hour at 950 p.s.i. The sea water is collected in a pressure tank with a controlled air pressure dome. 

Fortunately the Syngas Cooler cools the syngas by generating steam. The metal temperature of the steam generating tubes is practically the same as the steam/water temperature, which is substantially less than 1100°F. The cooler metal temperature is maintained by an internal water circulation system. ... 

Dr Hosokawa, director of the Minamata City hospital was conducting his own experiments based on the theory from the university He fed cats waste effluent from the factory that was producing acetaldehyde and was able to produce similar symptoms in them, and he detected other changes by pathological examination at autopsy The company that owned the factory, the Chisso Minamata Chemical Company, was aware of his work and by 1959 knew that it was likely that Minamata disease was caused by the effluent from their factory In i960 methyl mercury was detected in seafood and in 1961 it was detected in sediments derived from the factory. In 1966 the factory installed a water circulation system which removed the mercury pollution. The factory eventually stopped the process in 1968 and in the same year the Japanese government announced its opinion that the disease was due to consumption of methyl mercury in contaminated fish and seafood. 

Generally, in board mills lower quality water is needed when higher quality papers, e.g., fine papers, are produced. For that reason many board mills have closed their water circulation systems. However, the more the system is closed, the more the circulated water has to be purified. 

Wayhib . [Olin] Phosphate esters ccxr-rosum inhibited, pipeline scale inhibitor, water circulating systems for air conditioning, boiler treatment compds. 

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