Desulfurization and dedusting integrated system

Abstract

The invention provides a desulfurization and dedusting integrated system. The desulfurization and dedusting integrated system comprises a desulfurization tower, the bottom of the desulfurization tower is provided with a flue gas inlet, the desulfurization tower is internally provided with a spraying layer, a flue gas flow rectifier is arranged between the flue gas inlet and the spraying layer, the top of the desulfurization tower is provided with a flue gas outlet, a wet electrostatic precipitator is arranged at the flue gas outlet, and a flue gas rectification grille and a flue gas guide plate are arranged sequentially between the wet electrostatic precipitator and the flue gas outlet. A plurality of atomizing nozzles are arranged on the spraying layer, and each atomizing nozzle is a one-direction double-head structured nozzle and comprises a nozzle body and two spraying holes symmetrically and relatively obliquely formed in the nozzle body. A clearing mechanism is arranged between the flue gas rectification grille and the flue gas guide plate, and accordingly liquid drop scaling, flue blockage and corrosion of two reactors can be avoided effectively, system resistance is greatly reduced, and scales on the flue gas rectification grille and the flue gas guide plate can be cleared timely.

Description

technical field [0001] The invention relates to an integrated system for desulfurization and dust removal. Background technique [0002] At present, the most effective dust removal technology in thermal power plants is dry electrostatic precipitator, cloth bag dust removal or electric bag composite dust removal. These dust removal processes are all dry dust removal processes, that is, dust treatment and collection are completed before the desulfurization tower. The dust emission concentration at the outlet of the dry dust collector is generally 20~50mg / m3, which can meet the requirements of all current power plants. my country's current pollutant discharge standards include unit discharge standards and total discharge standards, national standards and local standards, and local standards are stricter than national standards. Therefore, there are ultra-low emission requirements with emission concentration less than 5mg / m3 in many places. In terms of ultra-low emission standa...

AI Technical Summary

Problems solved by technology

In the segmented design, because there is a long time adjustment section at the front end, the flue gas in the two reactors is relatively well distributed, but the connecting flue between them will be scaled and blocked during long-term operation. , causing the wet electrostatic demister at the rear end to have poor air intake

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