Double ph spray desulfurization tower two-way rectification liquid guide device

Abstract

The invention discloses a bi-directional rectifying and liquid guiding device of a dual-pH spraying desulphurization tower. The bi-directional rectifying and liquid guiding device is mainly used for guiding liquid of washing liquid of the dual-pH spraying desulphurization tower in the desulphurization technology and rectifying of rising smoke in the desulphurization tower. The bi-directional rectifying and liquid guiding device is arranged between dual-pH spraying devices in the desulphurization tower, and comprises a wall flow draining ring and a bowl-type liquid collecting disc; the wall flow draining ring is composed of an upper distribution arc ring, a lower distribution arc ring and a vibration liquid distribution ring, the upper distribution arc ring and the lower distribution arc ring are similar in shape and oppositely arranged, the concave surface is outward, one end of the upper distribution arc ring and one end of the lower distribution arc ring are installed on the inner wall of the desulphurization tower, the outer edge of the other end of the upper distribution arc ring abuts against the outer edge of the other end of the lower distribution arc ring, and the upper distribution arc ring and the lower distribution arc ring are connected with the vibration liquid distribution ring inwards; the bowl-type liquid collecting disc is arranged under the wall flow draining ring in the tower, an opening is formed in the upper portion of the bowl-type liquid collecting disc, the bottom of the bowl-type liquid collecting disc is connected to a high-pH slurry pool through a slurry pipe. The bi-directional rectifying and liquid guiding device is mainly used for separately recycling high-pH-value washing liquid and low-pH-value washing liquid, and has the advantages of being unique in structure, good in current-sharing effect, high in effective washing liquid gas ratio and desulphurization effect and small in absorption-tower resistance.

Description

Technical field: [0001] The invention provides a multifunctional two-way rectification liquid pH partition device, specifically a double-pH spray desulfurization tower two-way rectification liquid guide device, which belongs to the technical field of resource environment flue gas purification. Background technique: [0002] With the control of air pollutants in thermal power plants entering the ultra-low emission stage, the control requirements for the concentration of sulfur dioxide emissions in flue gas from thermal power plants have changed from the national standard GB13223-2011 to 200mg / m 3 down to 35mg / m 3 the following. At present, the conventional limestone-gypsum desulfurization process used is controlled by single tower spraying and single pH value, and the desulfurization efficiency is generally 95%. It is difficult to meet the new emission control requirements by relying on simple enlarged and conservative design, and there are uneconomical construction and oper...

AI Technical Summary

Problems solved by technology

The traditional single-tower single-pH control can only find a relatively compromised control range between high and low pH, and cannot completely solve this contradiction

At present, the single-tower double-cycle desulfurization towers used in China use conical bottom collecting bowls and slurry deflectors. The impact effect of flue gas flow blocking is obvious, the air flow transition is not smooth enough, and the distribution uniformity is poor, resulting in large flue gas flow resistance and smoke The energy consumption of the wind system has increased significantly

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