公开(公告)号：US4034717A

公开(公告)日：1977-07-12

申请号：US612244

申请日：1975-09-10

申请人： David N. Clum ,  Fletcher O. Holt

发明人： David N. Clum ,  Fletcher O. Holt

IPC分类号： F22B9/08 ,  F22G7/12 ,  F22B21/24 ,  F28F9/22

CPC分类号： F22B9/08 ,  F22G7/12

摘要： An improved multi-section heat exchanger unit for use in combination with a radiant furnace unit or direct fired heaters which comprises a first heat exchange section having a plurality of bare heat exchange pipes positioned therein and in fluid communication with a first heat exchange fluid inlet and a first heat exchange fluid outlet to provide fluid flow through the bare pipes; and a second heat exchange section having a plurality of extended surface heat exchange tubes positioned therein in fluid communication with a second heat exchange fluid inlet being in fluid communication with the outlet of the first heat exchange section, the second heat exchange section being further characterized as having a gradually reduced internal cross section towards its upper portion so that the velocity of gas flow therethrough is maintained substantially constant.In one embodiment a third heat exchange section having a plurality of extended surface heat exchange tubes positioned therein is provided wherein the tubes are in fluid communication with the tubes of the first and second heat exchange sections.

摘要翻译： 一种用于与辐射炉单元或直接燃烧加热器组合使用的改进的多段热交换器单元，其包括第一热交换部分，其具有定位在其中并与第一热交换流体入口流体连通的多个裸热交换管， 第一热交换流体出口，以提供流过裸管的流体; 以及第二热交换部，其具有与第一热交换部的出口流体连通的与第二热交换流体入口流体连通的多个延伸面热交换管，第二热交换部的特征还在于， 具有朝向其上部逐渐减小的内部横截面，使得通过其中的气体流速保持基本上恒定。

公开(公告)号：US4489679A

公开(公告)日：1984-12-25

申请号：US560463

申请日：1983-12-12

申请人： Fletcher O. Holt

发明人： Fletcher O. Holt

IPC分类号： F22D1/00 ,  F22D1/12 ,  F23J15/04 ,  F22D5/00

CPC分类号： F22D1/12 ,  F22D1/00 ,  F23J15/04

摘要： A once-through steam generator has both radiant and convection sections. The flue gases discharged from the convection section are passed through a wet scrubber to remove both sulfur oxides (SO.sub.x) and particulate matter. The feedwater to the convection section has its temperature controlled by the temperature of the flue gases discharged from the convection section, reducing the temperature of the feedwater by the use of a feedwater exchanger, as the convection section progressively fouls due to particulates in the flue gases. An additional heat exchanger upstream of the feedwater exchanger and convection section which scavenges additional heat from the wet scrubber liquids while the temperature of the flue gases into the scrubber are lowered to a temperature equal to or less than the water dew point temperature of the flue gases entering the scrubber.

摘要翻译： 一次通过蒸汽发生器具有辐射和对流段。 从对流段排出的烟气通过湿式洗涤器以除去硫氧化物（SOx）和颗粒物质。 对流部分的给水的温度受到对流部分排出的烟气温度的控制，通过使用给水交换器降低给水温度，因为对流部分由于烟道气中的颗粒而逐渐发生污染 。 在给水交换器和对流段上游的额外的热交换器，其清除来自湿式洗涤器液体的额外热量，同时进入洗涤器的烟道气的温度降低到等于或小于烟道气的水露点温度的温度 进入洗涤器。