Bipolar corona discharge flue gas desulfurization and dust removal method and equipment

Abstract

The invention discloses a bipolar corona discharge flue gas desulfurization and dust removal method and equipment. A plurality of atomizing nozzles are vertically and fixedly mounted at the top of a flue gas desulfurization absorption tower, the upper end of each atomizing nozzle is connected with a centrifugal pump positioned outside the flue gas desulfurization absorption tower by virtue of a voltage stabilizing valve, and the centrifugal pump is connected with a liquid storage tank for containing desulfurizer slurry. A horizontal corona discharge electrode is arranged under each atomizing nozzle, and all the corona discharge electrodes are connected in series together and then connected with a negative high-voltage electrostatic generator. The left side wall of the flue gas desulfurization absorption tower is connected with a flue gas corona discharge treatment chamber, and the flue gas corona discharge treatment chamber is connected with a flue gas generation device through a pipeline. A bur electrode is arranged in the flue gas corona discharge treatment chamber, and the bottom of the bur electrode is coaxially and fixedly connected with a motor and connected with a positive high-voltage electrostatic generator through a conducting wire. The method and the equipment can be used for respectively processing flue gas and slurry, the flue gas and the slurry can have electric charges with different polarities and then are contacted and mixed, and thus the purpose of improving absorption efficiency is achieved.

Description

technical field [0001] The invention relates to flue gas treatment and purification technology, in particular to equipment and methods for desulfurization and dust removal treatment of flue gas. Background technique [0002] Combustion of fossil fuels emits a large amount of SO 2 , NOx and CO 2 and other harmful gases and a large number of fine particles, among them, SO 2 , NOx can cause acid rain and other serious damage to the ecological environment, and a large number of submicron particles in the particulate matter can easily enter the human lungs through the respiratory tract, causing serious respiratory diseases. Nowadays, a large number of flue gas desulfurization, denitrification and dust removal equipment can improve the cleanliness of flue gas emissions, but it also consumes a lot of energy and water resources. At present, it is mainly by increasing the proportion of absorbent, increasing the spray density, and charging the absorbent to improve the SO concentrat...

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Problems solved by technology

[0003] The Chinese invention patent No. ZL200410066936.0 discloses a bipolar corona discharge smoke coagulation and electrostatic precipitator method and equipment, which proposes that the extremely fine dust particles in the dusty smoke pass through the positive and negative corona discharge areas , so that it is charged with positive and negative charges and coagulates each other and aggregates into larger particles, which are then input into the electrostatic precipitator for electrostatic precipitation. Good for sustained corona discharge

The Chinese invention patent No. ZL201110145966.0 discloses a swirling air intake type electrostatic spray wet flue gas desulfurization and dust removal device, which uses absorbent slurry to charge the slurry to improve the atomization effect of the slurry and make the droplets Charging, by adding additional mass transfer power to obtain a higher desulfurization effect and achieve the purpose of saving water resources consumption, but it only deals with the induction charging of droplets. In actual operation, induction charging is often caused by insulation difficulties. The charging is unstable; and it only charges the droplets, not the flue gas. When the droplets contact with the flue gas, the mass transfer driving force between the phases is insufficient

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