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Process Engineering Equipment Handbook Episode 3 Part 9

Tham khảo tài liệu 'process engineering equipment handbook episode 3 part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | V-4 Vaporizers Vaporizer Applications FIG. V-7 Vertical bayonet. Source Armstrong Engineering Associates. FIG. V-8 Indirect fluid heaters. Source Armstrong Engineering Associates. FIG. V-9 Tubular low-temperature vaporizers superheaters. Source Armstrong Engineering Associates. Vaporizers Vaporizer Applications V-5 FIG. V-10 Impedance electric heaters. Source Armstrong Engineering Associates. FIG. V-11 Electric resistance vaporizers. Source Armstrong Engineering Associates. Electrical radiant furnaces Radiant furnaces for high-temperature boiling levels of corrosive fluids or heating up to very high exit temperatures above fluid heating media capability i.e. 2000 F 1093 C . Also for very high-pressure or corrosive fluids. Sizes from 12 to 50 ft 3.6 to 15.3 m high. Can be very high capacity some about 15 000 kW 12 900 000 kcal h near nuclear site. See Fig. V-13. Cryogenic vaporizer For boiling very low temperatures -327 F -200 C . Flare drum duty to meet a few second startup emergency. Heating medium in shell and boiling fluid inside the tubes. Must be able to cope with thermal expansion and adjustments in a few seconds without damaging stresses. Also must avoid metallurgical problems including fatigue cycling for duties at high pressure such as ethylene etc. Avoid freeze-up problems and heat up the fluid to required exit temperatures with no accompanying freezeup problems. Also used to heat subzero fluids being distributed on service grids to multiple users and cold .