Flue gas desulfurization device based on ammonia-ammonium sulfate method

Abstract

The invention discloses an flue gas desulfurization device based on an ammonia-ammonium sulfate method. The flue gas desulfurization device comprises a flue gas desulfurization absorption tower and an outer circulation tank, wherein the flue gas desulfurization absorption tower internally comprises an oxidation segment, a pre-absorption segment, an outer circulation absorption segment, a washing segment and a fog removing segment from bottom to top, wherein the oxidation segment is internally provided with an absorption tower kettle guide bucket, the absorption tower kettle guide bucket mainly consists of a lower straight bucket and an upper trumpet-shaped bucket enlarged upwards, and the pre-absorption segment arranged above a flue hole is internally provided with an annular sieve plate with multiple sieve pores; the outer annular wall of the annular sieve plate is tightly connected with the tower wall of the pre-absorption segment, and the inner annular wall of the annular sieve plate is connected with an annular baffle which is arranged in the vertical direction. One absorption tower is used for finishing the processes such as cooling, absorption and oxidation of flue, the problem that the flue gas absorption efficiency is reduced since the flue gas escapes along tower wall in the traditional desulfurization technology is solved, the oxidation segment and the oxidation tank do not need mechanical power, the operation is reliable, and the occupied land and energy consumption of the device are lowered.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to an ammonia-ammonium sulfate method flue gas desulfurization device. Background technique [0002] The ammonia flue gas desulfurization technology uses ammonia as an absorbent to remove SO 2 Flue gas purification technology for other pollutants. In the early 1970s, countries such as Japan and Italy began to study ammonia flue gas desulfurization technology and succeeded in succession. However, its application was limited due to problems such as operating costs, corrosion, and aerosols in the exhaust after purification. In the 1990s, with the continuous development of the synthetic ammonia industry, technological progress and other reasons, the application of ammonia flue gas desulfurization technology rose rapidly. Ammonia flue gas desulfurization technology has characteristics that many other flue gas desulfurization technologies do not have. At present, ...

AI Technical Summary

Problems solved by technology

In the early 1970s, countries such as Japan and Italy began to study ammonia-based flue gas desulfurization technology, and achieved success one after another. However, due to problems such as operating costs, corrosion, and aerosols in the purified exhaust gas, its application has been limited to a certain extent.

The direct bubbling method is unevenly mixed, and the air bubbles and the absorption liquid are not well mixed. In order to ensure that the rising air bubbles and the absorption liquid are well mixed, some methods install an agitator in the oxidation tank. This form requires mechanical power. high energy consumption

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