Flue gas waste heat boiler capable of preventing dust accumulation

Abstract

The invention provides a flue gas waste heat boiler capable of preventing dust accumulation. Influences of smoke dust on heat exchange elements of an evaporator in the flue gas waste heat boiler can be reduced, the using effect of the flue gas waste heat boiler is ensured, the flue gas cooling efficiency and steam output are improved, the service life of the flue gas waste heat boiler is prolonged, and normal operation of a flue gas waste heat utilization dust removal system is ensured. The flue gas waste heat boiler comprises the evaporator, an upper box body, a lower box body and an ash bucket, wherein the upper box body, the lower box body and the ash bucket are sequentially connected from top to bottom. The evaporator is arranged in the upper box body, a steam pocket is arranged above the upper box body and correspondingly connected to the evaporator, a cyclone tube is arranged in the lower box body, the exhaust tube end of the cyclone tube communicates to the interior of the upper box body, an ash outlet of the cyclone tube communicates with the ash bucket, the upper box body is provided with a flue gas outlet, and the lower box body is provided with a flue gas inlet.

Description

technical field [0001] The invention relates to the technical field of energy saving and environmental protection, in particular to a flue gas waste heat boiler for preventing ash accumulation. Background technique [0002] In industrial production, various kilns are used, which will produce a large amount of high-temperature flue gas. These high-temperature flue gases contain smoke and dust, which need to be cooled and then discharged. There are generally two ways to cool these flue gases: one is to use cooling The medium absorbs the heat of the flue gas, and directly discharges it into the atmosphere after absorbing heat and heating up; the other is to absorb the heat of the flue gas and use the heat to provide heat sources for industrial production and life, which can save a lot of energy, and for the second cooling method The best way to utilize the flue gas waste heat is to use the flue gas waste heat boiler, which can produce waste heat steam, and the flue gas waste he...

AI Technical Summary

Problems solved by technology

[0002] In industrial production, various kilns are used, which will produce a large amount of high-temperature flue gas. These high-temperature flue gases contain smoke and dust, which need to be cooled and then discharged. There are generally two ways to cool these flue gases: one is to use cooling The medium absorbs the heat of the flue gas, and directly discharges it into the atmosphere after absorbing heat and heating up; the other is to absorb the heat of the flue gas and use the heat to provide heat sources for industrial production and life, which can save a lot of energy, and for the second cooling method The best way to utilize the flue gas waste heat is to use the flue gas waste heat boiler, which can produce waste heat steam, and the flue gas waste heat boiler is used as high-temperature flue gas cooling and waste heat utilization, which is generally used in the domestic high-temperature flue gas waste heat utilization dust removal system However, after many years of design and use, it is found that the dust in the flue gas directly affects the use of the flue gas waste heat boiler, that is, due to the different nature of the smoke generated by each furnace, it has an impact on the heat exchange elements of the evaporator in the flue gas waste heat boiler. They are also different. Some will accumulate dust on the heat exchange elements of the evaporator or even block the flue gas passage. The service life of the flue gas waste heat boiler will affect the normal operation of the flue gas waste heat utilization dust removal system

Images