| 摘要 |
PROBLEM TO BE SOLVED: To provide a water feed heating system capable of preventing the moisture in a circulating gas from dew condensation in a coke dry-extinguishing plant, and to provide a water feed heating method for controlling the temperature of water to be fed to a deaerator. SOLUTION: (1) The water feed heating system in the coke dry-extinguishing plant has the following construction and mechanism: There is installed a mixer 15 for mixing water to be fed to the deaerator 9 with hot water at the exit of a gas/water heat exchanger 5, and part of water at the exit of the mixer 15 is refluxed to the entrance of the heat exchanger 5 to form a water-circulating loop circulating between the mixer 15 and the heat exchanger 5. (2) The water feed heating method in the coke dry-extinguishing plant comprises using the water feed heating system described above(1) and keeping the temperature at a predetermined control level of the water to be fed to the deaerator 9 by regulating the divergence of a flow control valve 18 set in a flow path forming the water-circulating loop or the revolutions of a water-circulating pump 14 to control the water flow of the water-circulating loop. COPYRIGHT: (C)2005,JPO&NCIPI
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