Multistage combined tubular demister

Abstract

The invention relates to a multistage combined tubular demister. The demister comprises a tube bundle cylinder, a first-stage demisting element, a second-stage demisting element, a third-stage demisting element and a fourth-stage demisting element, the first-stage demisting element, the second-stage demisting element, the third-stage demisting element and the fourth-stage demisting element are coaxially and sequentially arranged in the tube bundle cylinder from bottom to top, the first-stage demisting element is provided with corrugated plate blades, the second-stage demisting element, the third-stage demisting element and the fourth-stage demisting element are provided with flat plate type guide vanes, each stage of demisting element has the separation capacity of liquid drops with different particle sizes and the corresponding resistance characteristic, and the demisting process is graded. The superposing effect of the separation effect is achieved through the multiple stages of demisting elements, the separation performance is guaranteed with the minimum pressure loss, and ultra-low and ultra-clean emission of flue gas in the desulfurizing tower is achieved.

Description

technical field [0001] The invention relates to the technical field of demisters for wet flue gas desulfurization towers, in particular to a multi-stage combined tubular demister. Background technique [0002] Limestone-gypsum wet flue gas desulfurization technology is currently the main technical measure used in my country to control flue gas pollution containing a large amount of sulfur dioxide emitted by coal-fired power plants. This technology is the most mature and widely used desulfurization technology at home and abroad. This technology is mainly Use limestone desulfurizer to spray and absorb coal-fired boiler flue gas containing sulfur dioxide harmful gas, and absorb harmful gas through desulfurizer slurry and flue gas contact reaction to achieve the purpose of purifying flue gas. [0003] There are still many mist and dust in the purified flue gas after spraying and absorption, among which the mist includes water mist, sulfuric acid mist generated by unremoved sulfur...

AI Technical Summary

Problems solved by technology

However, due to the high flue gas flow rate in the system, the flue gas contains a large number of large-size particles, and the flat tube type mist eliminator will cause local blockage, resulting in uneven distribution of flue gas flow rate, which will affect the use of the downstream roof type mist eliminator. effect, resulting in poor defogging effect of the demister and failing to meet the national environmental protection requirements

In addition, due to the surface tension factor, the uneven coverage of the flushing water film, the elastic collision between the droplets and the plate, and the re-mixing into the flue gas are one of the key reasons for the decline in the demisting efficiency.

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