Centrifugal flue gas desulfurization and denitration dedusting tower

Abstract

The invention provides a centrifugal flue gas desulfurization and denitration dedusting tower, which includes an outer tower body, a flue gas inlet tube, an inner cylinder and a spraying device. The flue gas inlet tube is arranged on a tower top side wall of the outer tower body, and forms an angle of 45 degrees with a tangent line of the outer tower body's outer wall surface, so that flue gas can form cyclone after entering the tower cavity. The inner cylinder is hung at the top of the outer tower body, the lower end opening of the inner cylinder is provided with a guide sleeve for flow guiding. The spraying device is equipped with a plurality of spray guns, the liquid sprayed by nozzles of the spray guns is used for desulfurization, denitration and dedusting treatment of external flue gas, and the spray guns are detachably and evenly inserted to the tower top between the outer tower body and the inner cylinder through a sealed insertion seat. According to the invention, the flue gas can form cyclone, the disposed inner cylinder makes the rotation standing time of flue gas in the tower cavity not less than 4 times longer than the original and achieve uniform stirring. The spraying device adopts a tower top layout, spraying can be more uniform, also the spray guns of the spraying device are mounted through the sealed insertion seat, inspection and repair can be very simple and convenient, and the nozzles are not blocked easily.

Description

technical field [0001] The invention relates to a centrifugal flue gas desulfurization, denitrification and dust removal tower, which belongs to the technical field of environmental protection and resource recycling. Background technique [0002] There are many processes for flue gas dedusting, desulfurization and denitrification in industrial furnaces in my country. The absorbents used are different, the process flow is different, the structure of the equipment is different, and the effect is completely different. Especially in recent years, with the improvement of my country's air pollutant discharge standards and scientific and technological progress, a considerable part of the process methods and equipment have been eliminated, and new dust removal, desulfurization, and denitrification processes and equipment continue to emerge. [0003] In the existing flue gas desulfurization, denitrification and dust removal tower, the flue gas enters from the bottom of the treatment ...

AI Technical Summary

Problems solved by technology

[0003] In the existing flue gas desulfurization, denitrification and dust removal tower, the flue gas enters from the bottom of the treatment tower through the induced draft fan, and then there are multi-layer mist spraying devices in the tower for continuous spraying to neutralize the sulfur and nitrogen oxides in the flue gas, but Usually, due to the large flow rate and fast flow rate of industrial gas, it is difficult to achieve the neutralization effect in a short time; such a large flow rate of flue gas enters the treatment tower, and it is easy to form a blind area and eccentricity of the air flow in the tower, resulting in uneven spraying and affecting the spraying In addition, most of the old-style multi-layer spray nozzles are arranged in the spray tower, which will affect the effect when clogged, and it is not easy to clean, which increases the difficulty of operation and labor intensity

Moreover, the design of the atomizing nozzle is unreasonable, and it is easy to be blocked, which affects the effect; when the spray neutralization effect data is not up to the standard, most enterprises will adopt a large increase in the amount of caustic soda or denitrification agent to deal with it, but the result is that the sewage is polluted. difficult to recycle

Cause secondary pollution, and the cost of daily use is greatly increased

Images