Low temperature desulfurizing, dedusting, mercury-removal, oxidation absorption reduction denitration integrated tower and purification technology

Abstract

A low temperature desulfurizing, dedusting, mercury-removal, oxidation absorption reduction denitration integrated tower and its purification technology are disclosed. The tower is structurally characterized in that a first water tank and a third water tank are filled with an alkali absorption liquid; a second water tank is filled with a liquid oxidizing agent absorption liquid; the tower body is composed of four towers; a self-excitation device is arranged below a first tower and a second tower; the first tower is provided with a smoke inlet, an oxygen injection opening, a spray thrower, a packing chamber and an impact opening from top to bottom; the second tower is equipped with a packing chamber, a spray thrower, an oxygen injection opening and an oxidizing agent injection opening from bottom to top; a third tower is provided with a spray thrower and a packing chamber from top to bottom; and a fourth tower is provided with a packing chamber, a tower pore plate, a spray thrower and a smoke outlet from bottom to top. Smoke enters the tower through the smoke inlet and passes through the four-stage towers to undergo multi-stage purification by oxygenation conversion and spray water-bath. Harmful substances such as sulfur dioxide, dust, mercury and the like are purified while nitrogen oxide undergoes harmless treatment by technical means of oxidation, absorption and reduction. Therefore, harmful gas in smoke is thoroughly removed, and pollutants are prevented from entering the atmosphere.

Description

1. Technical field [0001] The invention relates to a soot purification device, specifically a low-temperature desulfurization, dust removal, mercury removal, oxidation, absorption, reduction and denitrification integrated tower and its purification technology 2. Background technology [0002] At present, the soot produced by industrial kilns, oil furnaces and boilers used in various industries contains a large amount of harmful gases such as sulfur dioxide, nitrogen oxides, dust, mercury, etc., which are discharged into the atmosphere and cause pollution, which is the main cause of smog , destroying the ecological environment and posing a huge threat to human health. Effective control and removal of pollutants in flue gas emissions to make rational use of them has become an effective way to protect the atmospheric environment. However, the widely used flue gas purification towers are mostly used to treat sulfur dioxide and dust, and cannot treat nitrogen oxides and other ha...

AI Technical Summary

Problems solved by technology

Now widely used flue gas purification towers are mostly used to deal with sulfur dioxide and dust, and cannot deal with nitrogen oxides and other harmful gases at the same time, and nitrogen oxides can only be treated separately

The reason is that the purification of nitrogen oxides needs to go through three stages of oxidation, absorption, and reduction. The conversion of nitrogen oxides into nitrogen requires a long reaction time, and there should be enough time to react with oxygen and absorption liquid to transform completely. The current purification equipment It simply cannot meet the needs of nitrogen oxides to be reduced to nitrogen through three stages of oxidation, absorption, and reduction.

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