Desulfurizing tower

Abstract

The invention discloses a desulfurizing tower which comprises a desulfurizing tower body. The upper portion of the desulfurizing tower body includes a down-flow tower and an adverse-flow tower, a smoke inlet is formed in the down-flow tower, a smoke outlet is formed in the adverse-flow tower, and the lower portion of the desulfurizing tower body is a slurry pool. A front circulating desulfurizing zone is arranged in the down-flow tower, a rear circulating desulfurizing zone is arranged in the adverse-flow tower, vertical spiral guide vanes are arranged on the inner wall corresponding to the front circulating desulfurizing zone of the down-flow tower and on the inner wall corresponding to the rear circulating desulfurizing zone of the adverse-flow tower, an outlet of a front circulating pump is communicated to the front circulating desulfurizing zone through a front circulating pipe, an outlet of a rear circulating pump is communicated to the rear circulating desulfurizing zone through a rear circulating pipe, and spiral channels formed by a front circulating pipe and a rear circulating pipe along the corresponding vertical spiral guide vanes spirally extend into the front circulating desulfurizing zone and the rear circulating desulfurizing zone. The front circulating pipe and the rear circulating pipe extend into the spiral channels and can spray slurry in the spiral channels to enable smoke and slurry to be mixed fully, and desulfurizing effect is ensured.

Description

technical field [0001] The invention relates to a flue gas desulfurization technology, in particular to a desulfurization tower. Background technique [0002] The current single-cycle desulfurization tower system is mainly operated in medium and low-sulfur coal areas, which can fully meet the emission requirements. For some high-sulfur coal areas, the desulfurization efficiency is required to reach more than 98%, or even more than 99% to meet the emission requirements. To meet the emission requirements using a single-cycle desulfurization tower system, the desulfurization tower will be very high, and the energy consumption is relatively high. Sometimes Therefore, one desulfurization tower has to be divided into two desulfurization towers to operate in series. However, two desulfurization towers in series occupy an area and require a large investment, which is not conducive to efficient and economical operation; The interaction time with the flue gas is short, and the desulf...

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Problems solved by technology

For some high-sulfur coal areas, the desulfurization efficiency is required to reach more than 98%, or even more than 99% to meet the emission requirements. To meet the emission requirements using a single-cycle desulfurization tower system, the desulfurization tower will be very high, and the energy consumption is relatively high. Sometimes Therefore, one desulfurization tower has to be divided into two desulfurization towers to operate in series. However, two desulfurization towers in series occupy an area and require a large investment, which is not conducive to efficient and economical operation; The interaction time with the flue gas is short, the desulfurization is not complete, and it is not conducive to environmental protection

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