Dual cycle pocked stone pagoda stack gas desulfurizing and dedusting apparatus

Abstract

The invention is a double-circulating granite tower fume -desulfurizing and -dust cleaning device, including granite tower main body, solution distributor, dust-water circulating system and sedimentation tank. Its character: there is an annular wetting sprayer in the inlet channel of the granite tower; the solution distributor is composed of many pipes extending into the granite tower and uniformly distributed along the circumference on the granite tower main body and near the top; the top of the granite tower main body is also installed with a two-stage desulfurizing and dust-cleaning device. Its beneficial effect: adopting a double-circulating system, i.e. the dust-water and alkali liquor independently circulate, respectively, thus enhancing the alkali utilization ratio and making the desulfurizing and dust-cleaning course stable and the desulfurizing and dust-cleaning efficiency high. The two-stage desulfurizing circulation has high desulfurizing efficiency and plays a role in primary dehydrating, and the low-resistance demister on the top of the desulfurizing tower can thoroughly eliminate fine water drops in the fume, ensuring that the fume carries no water. Adopting solution distributing pipes to replace solution distributing tanks can use samller water quantity to form a uniform falling liquid film on the inner wall of the dust-cleaning tower, ensuring dust-cleaning efficiency and avoiding dust accumulating.

Description

technical field [0001] The invention relates to boiler desulfurization and dust removal technology, in particular to a double-circulation stone tower flue gas desulfurization and dust removal device. Background technique [0002] Flue gas desulfurization and dust removal of small and medium-sized power plants and large and medium-sized industrial boilers is related to the air quality and environmental protection in the region, and is closely related to the health of the people. A kind of granite water film dust collector is often used in the prior art of this field, and it is made up of granite tower main body, Venturi tube, liquid distribution tank, gray water circulation system and settling tank etc. This kind of dust collector has a good effect on the removal of smoke and dust particles, but it has a poor effect on desulfurization. At the same time, it also has some shortcomings, which also affect the normal use and dust removal effect. One is that when desulfurization a...

AI Technical Summary

Problems solved by technology

This kind of dust collector has a good effect on the removal of smoke particles, but it has a poor effect on desulfurization. At the same time, it also has some shortcomings, which also affect the normal use and dust removal effect.

One is that when desulfurization and dust removal are carried out at the same time, if the liquid distribution device cannot continuously supply water, or the concentration of calcium ions in the alkali solution is supersaturated and crystallized, it will cause ash blockage on the inner wall of the equipment; the other is scaling phenomenon. Due to the small packing and device space inside the equipment, the anti-scaling ability is poor, and the desulfurization liquid generates calcium sulfate and calcium carbonate crystals under the action of high-temperature flue gas to block the equipment, causing the equipment to fail to operate normally

The third is that due to the poor structure of the flue gas demisting device, the fan carries water and cannot effectively remove the liquid droplets in the flue gas

The fourth is that when the foundation of the stone tower dust collector sinks, it is easy to cause the liquid distribution tank to tilt, resulting in the failure of the liquid distribution, and the problems of dust accumulation and dust removal efficiency drop

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