VACUUM BOILER-TYPE EVAPORATOR

PURPOSE:To improve the construction of an auxiliary heat-exchanger to be used for preventing the stagnation of noncondensable gas in a heat-transfer tube. CONSTITUTION:A heat-transfer tube passing through the evaporation part of a vacuum boiler-type evaporator is provided with a heat-exchanging mean...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HANAMURE MASAKAZU, SATO YOJI, SHOTANI HITONOBU, MIURA TOSHIYASU, MIYATA YOSHIAKI, IKEDA SEIDO
Format:	Patent
Sprache:	eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL BLASTING CHEMISTRY FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES FIRELIGHTERS FIXED-CAPACITY GAS-HOLDERS FUELS FUELS NOT OTHERWISE PROVIDED FOR HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING LIGHTING LIQUEFIED PETROLEUM GAS LUBRICANTS MECHANICAL ENGINEERING METALLURGY NATURAL GAS PEAT PETROLEUM, GAS OR COKE INDUSTRIES STORING OF DISTRIBUTING GASES OR LIQUIDS SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the construction of an auxiliary heat-exchanger to be used for preventing the stagnation of noncondensable gas in a heat-transfer tube. CONSTITUTION:A heat-transfer tube passing through the evaporation part of a vacuum boiler-type evaporator is provided with a heat-exchanging means to exchange the heat between a part at the upstream side of the evaporation part and an auxiliary heat-exchanger placed in a condensed liquid return line extending from the evaporation part to the evaporator pot. The apparatus has the following merits. (1) It is not necessary to extend the pipe to the installation site of the auxiliary heat-exchanger in contrast with conventional apparatus to use an external fluid as a cooling medium and, accordingly, the apparatus cost and installation space can be reduced. (2) The supplying source of the external fluid and the operation cost of the source can be eliminated. (3) The thermal efficiency of the evaporator is improved by the effective utilization of the condensation heat of the steam for the evaporation of the lowtemperature fluid.