Two-level absorption desulfuration denitration demercuration particulate matter 2.5 (PM2.5) removal washing tower

Abstract

The invention relates to a two-level absorption desulfuration denitration demercuration particulate matter 2.5 (PM2.5) removal washing tower, which is provided with a first level absorption device and a second level absorption device. For the first level absorption device, a recoverer is disposed below an atomizing tube, a tower outside absorption agent output from an external storage tank is recycled through a pipeline, and then the absorption agent is lifted to a first level absorption atomizing tube through a circulating pump. The second level absorption device and a tower inside absorption agent form circulation through the circulating pump, a Venturi tube and a second level absorption atomizing tube to have strong atomizing effect and effectively increase contact area of smoke and the absorption agents. In addition, an air separator and an ozone generator are further disposed at the inlet position of the washing tower so that large-air-capacity and high-efficiency desulfuration denitration demercuration integration can be achieved.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to a two-stage absorption, desulfurization, denitrification, and mercury removal washing tower for removing PM2.5. Background technique [0002] The flue gas of coal-fired boilers contains SO 2 Pollutants such as , NOx and heavy metals (Hg and Ag) have increasingly become the main sources of air and soil pollution. In the Twelfth Five-Year Plan, NO X The total amount control will be implemented nationwide. If there is no flue gas denitrification device, the NO in the flue gas exhausted to the atmosphere will X It will exceed the limit of national standards and affect the production. Therefore, increasing NO in the existing flue gas purification treatment device X Advanced purification devices have become an inevitable trend in the industry. At present, there are many treatment technologies for flue gas or industrial tail gas, among which the relatively...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, desulfurization, denitrification, and mercury removal are all set up as independent units, which leads to defects such as high construction costs, large floor area, low removal efficiency, and high operating costs.

Moreover, the traditional device generally adopts a first-stage reactor layout, which not only increases the space height of the reactor equipment, but also brings difficulties in installation and maintenance. Unfavorable factors can not achieve the best economic operation effect

Images