公开(公告)号：US20040045489A1

公开(公告)日：2004-03-11

申请号：US10655229

申请日：2003-09-03

Applicant: Aptech Engineering Services, Inc.

Inventor： Terry W. Rettig ,  T. Steven I. Torbov

IPC: F23B007/00 ,  F23L015/00

CPC classification number: F22B37/008 ,  F22B37/48

Abstract: The present invention is a method for reducing the slagging and fouling of the surfaces of the waterwalls, firebox, superheater, and reheater of the furnace of a coal-fired steam boiler. The process reduces the firebox exit temperature to below the specific ash melting temperature by injecting the following, either alone or in combination, into ports located in the upper section of the firebox: recirculated flue gas from downstream of the electrostatic precipitator, atomized water, or a sorbent water slurry. All of these materials have a lower temperature than the main flue gas or require additional heat for evaporation. Mixing these materials with the main flue gas from the furnace will not affect the coal combustion process, yet will reduce the temperature of any fly ash particles in the main flue gas to below the specific ash fusion temperature, and thus, prevent slagging and fouling within the furnace.

Abstract translation: 本发明是一种减少燃煤蒸汽锅炉的炉壁，火炉，过热器和再热器表面的结垢和结垢的方法。 该方法将火箱出口温度降低到低于特定灰分熔融温度，通过将以下方式单独地或组合地注入位于火炉上部的端口：来自静电除尘器下游的再循环烟道气，雾化水或 吸附剂水浆。 所有这些材料的温度低于主烟道气或需要额外的热量进行蒸发。 将这些材料与来自炉的主要烟道气混合不会影响煤燃烧过程，而将主烟道气中的任何飞灰颗粒的温度降低到特定的灰熔融温度以下，从而防止炉渣内的结渣和结垢 炉子。