High-temperature high-humidity flue gas bag type dust collection and ash removal method and device thereof

Abstract

The invention discloses a high-temperature high-humidity flue gas bag type dust collection and ash removal method and device. The device comprises a flue gas main pipe and a bag type dust collector, wherein the front end of the flue gas main pipe is connected with an air preheater; the tail end of the flue gas main pipe is respectively communicated with each bag room of the bag type dust collector; a hot air outlet of the air preheater is respectively connected with each bag room of the bag type dust collector; an ash removal structure is connected to the bag type dust collector. The air preheater is arranged on a high-temperature high-humidity flue gas pipeline, air is preheated by utilizing one part of high-temperature high-humidity flue gas, the preheated dry air is introduced into a to-be-cleaned bag room of the bag type dust collector so as to dry the bag and dust, ash removal is performed after the bag and dust are completely dried. Therefore, the ash removal difficulty in the high-temperature high-humidity flue gas bag type dust collection process is solved, air preheating energy comes from the high-temperature high-humidity flue gas, a heat source does not need to be additionally provided, an energy-saving effect is achieved, the dust removal difficulty and cost are greatly reduced, the ash removal efficiency and the dust collection efficiency are improved, and operation of the bag type dust collector can be stable.

Description

technical field [0001] The invention relates to flue gas dust removal technology, in particular to a high-temperature and high-humidity flue gas bag-type dust removal method and device thereof. Background technique [0002] Serious air pollution and frequent smog weather have had serious adverse effects on my country's economic and social development. Particulate matter emitted by various types of industrial flue gas is the main pollution factor affecting air quality, and has become one of the main causes of haze weather. The control of industrial smoke pollution has been highly concerned by governments at all levels and the society. The State Council issued the "Action Plan for Air Pollution Prevention and Control" in September 2013, in order to effectively control air pollution and improve air quality significantly. [0003] The bag filter is widely used because of its high dust removal efficiency, stable operation, simple operation, favorable dust recycling and disposal,...

AI Technical Summary

Problems solved by technology

However, when the bag filter is used for dust removal of high-temperature and high-humidity flue gas, when the temperature drops, the relative humidity of the flue gas increases, the flue gas is easy to condense, and dust agglomeration and sticky bags are easy to appear on the bag filter bag. , the bag filter adopts the aforementioned dust cleaning method to clean the dust, it is difficult, or even impossible to clean the dust, and then the filter bag is airtight or the filter bag is completely blocked by the dust adhered to it, so that the bag filter cannot work normally.

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