Device and method for treating evaporation and desulfurization waste water of high-temperature flue gas
A technology for desulfurization wastewater and high-temperature flue gas, which is applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems that water droplets are easy to appear in the ash hopper, and the evaporation effect is not particularly ideal, so as to facilitate safe and stable operation and improve System operation reliability and adjustment flexibility, corrosion prevention effect
Pending Publication Date: 2018-04-24
POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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Problems solved by technology
The equipment in this patent solves some of the problems in the above three patents, but the evaporation effect is still not ideal, and the ash hopper at the bottom of the wastewater evaporation tower is prone to water droplets
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[0028] Below in conjunction with embodiment the present invention is described in further detail:
[0029] Such as figure 1 As shown, a high-temperature flue gas evaporative desulfurization wastewater treatment device includes an SCR catalytic denitrification system 2, an air preheater 3, an electrostatic precipitator 4, an induced draft fan 5, a wet desulfurization absorption tower 6, a chimney 7, and an SCR The front end of the catalytic denitrification system 2 is connected to the boiler 1 flue, the rear end is connected to the air preheater 3 wet desulfurization absorption tower 6, the bottom is connected to the gypsum dehydration system 8 and the desulfurization wastewater storage tank 9, and the desulfurization wastewater storage tank 9 is connected to the water pump 10, It is connected to the water inlet at the top of the evaporation tower 11 through the water inlet pipe 26 . A rotary atomizer 12 is installed in the evaporation tower 11 to atomize the desulfurization w...
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The invention discloses a device and a method for treating evaporation and desulfurization waste water of high-temperature flue gas and belongs to the field of treatment of industrial waste water. Thedevice comprises an SCR (selective catalytic reduction) catalytic denitration system, an air preheater, an electrostatic precipitator, an induced draft fan, a wet desulfurization absorption tower anda chimney which are connected in sequence, wherein a desulfurization waste water storage box is connected with the bottom of the wet desulfurization absorption tower and connected to a water inlet inthe top of an evaporation tower through a water pump; a high-flow gas inlet and a low-flow gas inlet are formed in the top and the bottom of the evaporation tower respectively; the two gas inlets areconnected with a gas diverter outlet respectively, and a gas diverter inlet is connected with the induced draft fan and a gas flue between the SCR catalytic denitration system and the air preheater;a gas outlet formed in the middle of the evaporation tower is connected with a gas flue between the air preheater and the electrostatic precipitator through a gas outlet pipeline. According to the device and the method, the evaporation effect is improved, energy consumption is reduced, content of gaseous chlorine at the outlet of the evaporation tower is reduced, and safe and stable operation of follow-up equipment is facilitated.
Description
technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a desulfurization wastewater treatment device and a treatment method thereof. Background technique [0002] Limestone / gypsum wet desulfurization process, as the mainstream desulfurization technology in coal-fired power plants, has the advantages of high desulfurization efficiency, mature technology, stable operation and convenient maintenance. However, in order to maintain stable and reliable operation of the slurry circulation system, a certain amount of desulfurization wastewater needs to be discharged regularly . The "Guidelines for Feasible Technologies for Pollution Prevention and Control in Thermal Power Plants" officially implemented in June 2017 clearly stated that, in addition to desulfurization wastewater, all types of wastewater after treatment can basically achieve "multiple uses of one water, cascade utilization", and the wastewater will not be discharg...
Claims
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IPC IPC(8): B01D53/86B01D53/78B01D53/50B01D53/73B03C3/017B03C3/34
CPCB01D53/507B01D53/73B01D53/78B01D53/8625B03C3/017B03C3/34B01D2258/0283
Inventor 贾绍广马双忱张润盘李青松向亚军李静宜
Owner POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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