Special bubbling system for dust removal by wet flue gas desulfurization

Abstract

The invention relates to a special bubbling system for dust removal by wet flue gas desulfurization. The bubbling system comprises a plurality of flue gas pipes (1), bubbling pipes (2) and absorption wetting liquid delivery subsystems (3), wherein the bubbling pipes (2) are arranged on the side walls of the flue gas pipes (1); liquid-vapor bubble releasing devices (21) are arranged on the bubbling pipes and used for emitting liquid-vapor bubbles to be released into the flue gas pipes (2); the lower ends or the upper ends of the bubbling pipes (2) are connected with the absorption wetting liquid delivery subsystems (3); the absorption wetting liquid delivery subsystems (3) enable absorption wetting liquid containing an alkaline active agent to form intensive bubbles in the bubbling pipes (2) by certain air pressure, and inject the bubbles into the flue gas pipes (1) through the liquid-vapor bubble releasing devices (21) on the bubbling pipes (2); in the flue gas pipes (1), rising flue gas and intensive bubbles are converged and blended, so that flue gas can be in full contact with the bubbles, a small amount of residual SO2 in flue gas can be absorbed, and at the same time superfine particulate matters in wetting flue gas can be absorbed, the superfine particulate matters can be enabled to enter liquid or wetted to coagulate to form fogdrops , so as to be easily separated.

Description

technical field [0001] The invention relates to a desulfurization and dust removal equipment, in particular to a bubbling system. technical background [0002] With the full development of global industrialization, environmental problems have become increasingly prominent, especially the use of a large amount of fossil fuels has led to increasingly serious air pollution problems, and acid rain and haze problems have endangered human existence. The sulfur dioxide and smoke emitted by coal-fired boilers are one of the most important sources of acid rain and haze. For this reason, the coal-fired boiler flue gas emission standards formulated by governments of various countries have made more and more stringent limits on the content of sulfur dioxide and soot. [0003] In recent years, my country's air pollution is also increasing. Since 2013, "smog" has become an annual hot word in China. According to a report, less than 1% of the 500 largest cities in China meet the air qual...

AI Technical Summary

Problems solved by technology

[0009] There are three main reasons why the existing conventional desulfurization and denitrification technologies are difficult to achieve near-zero emissions: First, there are still a small amount of SO 2 The flue gas is not fully absorbed at the spray layer; the second is that the mechanical demister does not completely remove zero; the third is that the wettability of PM10 and below, especially ultrafine particles such as PM2.5, is poor and cannot be removed by the mechanical demister

The existing bag filter is also powerless to PM2.5 ultrafine particles due to the bag mesh and pressure loss limitation

Existing electrostatic precipitators are difficult to remove because of the high specific resistance of PM2.5 ultrafine particles and difficulty in charging.

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