Multicyclone coupling dedusting and defogging equipment

Abstract

The invention discloses multicyclone coupling dedusting and defogging equipment, which is arranged in a desulfurization tower and comprises a barrel with a dedusting and defogging chamber inside, wherein a flue gas inlet is formed in the bottom of the barrel, a flue gas outlet is formed in the top of the barrel, the dedusting and defogging chamber is divided into a cyclone coupling region and an electric field region, the electric field region is positioned above the cyclone coupling region, multiple tube bundle devices for dedusting and defogging are distributed in the dedusting and defogging chamber along the vertical direction, a flushing device is arranged above the tube bundle devices, multiple inner barrels for forming the cyclone coupling region, cyclone separators arranged in the inner barrels, deflector rings arranged between every two adjacent cyclone separators and cathode systems for forming the electric field region are arranged in the tube bundle devices, and a high-voltage power system is electrically connected to the cathode system, and is arranged outside the barrel. According to the equipment, the centrifugal movement speed of an airflow can be increased, tiny fog drops and dust particles can be captured, and a good flue gas dedusting and defogging effect is achieved.

Description

technical field [0001] The invention relates to a dedusting and demisting device for flue gas discharged from a desulfurization outlet of a coal-fired boiler, in particular to a multi-tube swirl coupling dedusting and demisting device. Background technique [0002] Coal is the main energy structure in my country. Coal produces a large amount of pollutants during the combustion process. Coal boilers use more than 80% of my country's total coal output, resulting in a large amount of sulfur dioxide and smoke emissions, resulting in serious air pollution. Pollution, acid rain and water pollution. [0003] In the prior art, desulfurization towers are often used to absorb and treat sulfur dioxide and dust emitted by coal-fired boilers. However, some dust pollutants will be discharged at the outlet of the desulfurization towers, and these pollutants will cause certain damage to the environment. Among them, Part of it is the dust in the mist droplets escaping from the outlet of the ...

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Problems solved by technology

[0003] In the prior art, desulfurization towers are often used to absorb and treat sulfur dioxide and dust emitted by coal-fired boilers. However, some dust pollutants will be discharged at the outlet of the desulfurization towers, and these pollutants will cause certain damage to the environment. Among them, Part of it is the dust in the mist droplets escaping from the outlet of the desulfurization tower, and the other part is the fine dust that has not been washed clean in the original flue gas

[0004] In addition, in the prior art, the wet desulfurization spray method is often used to purify the flue gas generated by boiler combustion. During the process of purifying the flue gas, the amount of slurry sprayed is large, and part of the slurry droplets will be absorbed by the desulfurization tower. The rising flue gas is substituted into the upper part of the mist eliminator, while the common flat and roof type mist eliminators separate the critical particle size of the mist entrained in the flue gas to a size greater than or equal to 30 microns (μm), while a large number of The mist droplets smaller than 30 microns (μm) are not captured, and are finally discharged from the demister, causing certain pollution to the environment; in addition, the tube bundle demister used in the prior art, due to The amount of flue gas varies with the change of working conditions. The flue gas flow rate in the desulfurization tower changes greatly. When the flow rate of the flue gas through the tube bundle decreases, the centrifugal force decreases rapidly. Environmental pollution, therefore, it is very important to effectively remove dust and fog from the flue gas discharged from the desulfurization tower of the coal-fired boiler

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