Multicyclone coupling dedusting and defogging equipment

Abstract

The invention discloses a multi-pipe swirling flow coupling dedusting and mist removal equipment. The equipment is arranged in a desulfurization tower and includes a cylinder body with a dust removal and mist removal chamber inside. The bottom of the cylinder body is provided with a smoke inlet, and the top is provided with a smoke outlet. The dust removal and mist removal chamber is divided into a swirl coupling area and an electric field area. The electric field area is located above the swirl coupling area. There are many tube bundle devices for dust removal and mist removal distributed along the vertical direction in the dust removal and mist removal chamber. Above the tube bundle device A flushing device is provided, and a plurality of inner cylinders forming a swirl coupling area, a cyclone separator installed in the inner cylinder and a guide ring arranged between two adjacent cyclone separators are arranged inside the tube bundle device. And a cathode system forming an electric field area, the cathode system is electrically connected to a high-voltage power supply system, and the high-voltage power supply system is arranged outside the cylinder. The invention can increase the centrifugal movement speed of the airflow, trap tiny fog droplets and dust particles, and has good smoke and dust removal and fog removal effects.

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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