Mai wa Deaerating Heater da kuma Yadda Ake Amfani Da Ita

Na deaerating heater, ko kuma ake kira deaerator, ita ce aiki mai karfi da ke cikin feedwater na boiler da za su iya haka gases da suka yawa, musamman oxygen da carbon dioxide. Gases da suka yawa zai iya taka abincin da sarrafa daidai ga boiler da kuma muhimman abubuwa a cikinsu, kuma zai iya rage mafi kyauwar steam cycle. Saboda haka, deaerating heaters sun fi shi don bincike daidai ga feedwater na boiler da kuma inganci.

Deaerating heaters suna nufin da suka ci gaba da labarai: tray type da spray type. Duk labaran sun amfani da steam don ya kula feedwater da kuma ya haka gases da suka yawa. Steam na bi yana da muhimmiyar tsarin da ke amfani da shi wajen haka oxygen-scavenging chemicals, kamar hydrazine ko sodium sulfite, da ke yi waɗannan oxygen da suka yawa a cikin feedwater.

Tray Type Deaerating Heater

Tray-type deaerating heater ana nufin da shi ce cylindrical vessel na vertical da kuma series of perforated trays a cikinsu. Feedwater ta fara daga fadada da kuma ta fara ne ta samu trays, ta haɗa sabon ruwan da ya fara ne ta samu trays, ta haɗa sabon ruwan da ya fara ne ta samu trays, ta haɗa sabon ruwan da ya fara ne ta samu trays. Steam ta fara daga fadin da kuma ta fara ne ta samu trays, ta haɗa sabon ruwan da ya fara ne ta samu trays. Deaerated water ta kusa a fadada na vessel da kuma ta pump to the boiler. Vented gases ta fara daga fadada na vessel.

Muhimmin tray-type deaerating heater sun hada:

• Yana iya yanayi da feedwater flow rates da temperatures da suka yawa.

• Yana iya samun levels da suka yawa da dissolved oxygen (less than 5 ppb) da carbon dioxide (less than 1 ppm).

• Yana da storage capacity mai yawa don feedwater, wanda yake taimaka wajen bincike pressure da temperature a cikin boiler.

Dutsen tray-type deaerating heater sun hada:

• Yana bukatar steam da yawa don deaeration, wanda yake rage thermal efficiency na cycle.

• Yana da capital cost da maintenance cost mai yawa saboda tsari da size na vessel da trays.

• Yana da scaling da fouling a cikin trays, wanda yake rage heat transfer da deaeration efficiency.

Spray Type Deaerating Heater

Spray-type deaerating heater ana nufin da shi ce cylindrical vessel na horizontal da kuma spray nozzle a cikinsu. Feedwater ta fara daga fadada da kuma ta fara ne ta samu stream of steam da ta fara daga fadada. Steam ta kula ruwan da kuma ta haka gases da suka yawa. Deaerated water ta kusa a fadada na vessel da kuma ta pump to the boiler. Vented gases ta fara daga fadada na vessel.

Muhimmin spray-type deaerating heater sun hada:

• Yana bukatar steam da yawa don deaeration, wanda yake taimaka wajen bincike thermal efficiency na cycle.

• Yana da capital cost da maintenance cost da yawa saboda simplicity da compactness na vessel da nozzle.

• Yana da scaling da fouling da yawa saboda high velocity da turbulence na ruwan da steam.

Dutsen spray-type deaerating heater sun hada:

• Ba zan iya yanayi da very high ko very low feedwater flow rates da temperatures ba tare da masu rage deaeration efficiency.

• Ba zan iya samun levels da suka yawa da dissolved oxygen (about 10 ppb) da carbon dioxide (about 5 ppm) kamar tray-type deaerating heater.

• Yana da storage capacity mai yawa don feedwater kamar tray-type deaerating heater, wanda yake taimaka wajen bincike pressure da temperature fluctuations a cikin boiler.

Factors Affecting Deaeration Efficiency

Efficiency na deaeration tana da ma'ana da factors da suke hada, kamar:

• Temperature da pressure na feedwater da steam. Higher temperature da lower pressure yana iya sa solubility na gases a cikin ruwan, wanda yake taimaka wajen rage deaeration. Saboda haka, ita ce muhimmiya don bincike optimal temperature difference bayan feedwater da steam (usually about 5°C) da kuma optimal pressure a cikin deaerating heater (usually about 0.2 bar).

• Amount da quality na steam da ake amfani don deaeration. Steam yana da saturated da free of non-condensable gases. Steam flow rate yana da zama don provide required heat da mass transfer don deaeration. Steam flow rate yana da regulate don bincike constant pressure a cikin deaerating heater.

• Design da operation na deaerating heater. Deaerating heater yana da surface area da contact time da yawa don feedwater da steam. Feedwater yana da spray ko distribute evenly over trays or nozzles don create thin film of water. Deaerating heater yana da vent condenser don recover heat da water from vented gases.

Benefits of Deaerating Heaters

Deaerating heaters suna da benefits da suke hada don boiler systems, kamar:

• Sun bincike corrosion da pitting na boiler tubes, drums, da kuma components da suke hada don haka dissolved oxygen da carbon dioxide from feedwater.

• Sun rage chemical oxygen scavenger consumption da cost da minimize residual oxygen in feedwater.

• Sun bincike thermal efficiency na boiler da preheating feedwater to near saturation temperature, rage heat loss da fuel consumption.

• Sun bincike reliability da availability na boiler da rage risk na boiler failures da downtime due to corrosion da scaling.

Conclusion

Deaerating heaters suna da muhimmiya a cikin boiler water treatment da protection. Suna haka dissolved gases from feedwater using steam as heating da purging agent. Suna nufin da suka ci gaba da labarai: tray type da spray type, depending on their design da configuration. Sun operate based on principles of Henry’s Law, Dalton’s Law, da mass da heat transfer. Suna bukatar optimal conditions of temperature, pressure, da steam flow rate don achieve high deaeration efficiency. Suna da benefits da suke hada don boiler systems, kamar preventing corrosion, reducing chemical consumption, improving thermal efficiency, da increasing reliability.

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