Flue gas desulfurization and dust removal method and device

Abstract

The invention provides a flue gas desulfurization and dust removal method and device. The device comprises a desulfurization tower (1), wherein the internal space of the desulfurization tower (1) is divided into an upper bin (2), a middle bin (3) and a lower bin (4) which are closed relative to one another from top to bottom through a first partition board (5) and a second partition board (6), a flue gas discharge outlet (21) is formed in the top of the upper bin (2), and a demisting device (22) is arranged in the upper bin from top to bottom; the middle bin (3) is provided with a flue gas inlet (31) used for leading flue gas to be processed into the desulfurization tower, at least one flue gas channel (32) is arranged in the middle bin (3) to be used for communicating the upper bin (2) with the lower bin (4), and a sprinkling device (33) is arranged on the top in the middle bin (3); a liquid storage container (41) used for storing flue gas desulfurization agent solution is arranged on the bottom of the lower bin (4), and the second partition board (6) between the middle bin (3) and the lower bin (4) is provided with at least one scattering pipe (42), and the scattering pipes (42) are communicated with the middle bin (3) and the lower bin (4).

Description

technical field [0001] The invention belongs to the field of flue gas treatment, and in particular relates to a flue gas desulfurization and dust removal method and device. Background technique [0002] Flue gas desulfurization (FGD) is currently the only large-scale commercial application of desulfurization technology in the world. Flue gas desulfurization technology can be divided into three types of processes according to the dry and wet forms of desulfurization agents and desulfurization products: wet desulfurization technology (desulfurization agent and by-products are mixed), semi-dry desulfurization technology (desulfurization agent desulfurization in a dry state) , Regeneration in wet state, or desulfurization in wet state, processing desulfurization products in dry state), dry desulfurization technology (desulfurization agent and by-products are both in dry state). There are more than 200 flue gas desulfurization technologies researched and developed by various cou...

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Problems solved by technology

[0010] It can be seen that the most ideal desulfurization direction is wet flue gas desulfurization technology. However, this technical method has the disadvantages of large area, large infrastructure investment, high operating cost, large water consumption, and the generated by-products (such as gypsum) are affected by the use of The limitation of the system is easy to cause secondary pollution; after desulfurization, the temperature of the flue gas is low, and it needs to be reheated to exhaust the smoke, etc.

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