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

Abstract

The invention designs a bidirectional flow straightening and liquid guiding device of a double pH spray desulfurizing tower. The bidirectional flow straightening and liquid guiding device is mainly used for guiding washing liquid of the double pH partition spray desulfurizing tower in the desulfurizing process and straightening flow of ascending smoke in the desulfurizing tower. The device is arranged between a high pH spray device and a low pH spray device in the desulfurizing tower, and comprises a wall flow guiding ring and a liquid tray. The wall flow guiding ring is formed by combining an upper distribution arc ring body, a lower distribution arc ring body and a vibration liquid distributing ring body, wherein the upper distribution arc ring body and the lower distribution arc ring body are similar in shape and are oppositely and symmetrically arranged with the concave faces facing outwards, the outer edges of the upper distribution arc ring body and the lower distribution arc ring body are installed on the inner wall of the desulfurizing tower, abut against each other and are connected, and the inner circles of the inner edges of the upper distribution arc ring body and the lower distribution arc ring body are connected with the vibration liquid distributing ring body. The liquid tray is arranged under the wall flow guiding ring, and is installed in the desulfurizing tower through a supporting frame, the upper portion of the liquid tray is open, the bottom of the liquid tray is connected to a high-pH size tank through a size pipe, and a plurality of ascending smoke flow even-dividing pipes are arranged in the liquid tray and penetrate through a tray body. The device has the advantages of being unique structure, good in flow even dividing effect, high in smoke washing effective liquid-smoke ratio and desulfurizing efficiency and small in absorbing 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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