Desulfuration concentrated wastewater treatment device

Abstract

The invention relates to a limestone or gypsum wet method flue gas treatment system, in particular to a desulfuration concentrated wastewater treatment device. The desulfuration concentrated wastewater treatment device comprises a flue gas inlet pipe communicated with hot flue gas and a vertical connecting pipe, the axis of the flue gas inlet pipe is in a horizontal state, the flue gas inlet pipe is connected with the vertical connecting pipe through a steering flue, the bottom of the steering flue is provided with an ash hopper, a plurality of flow guide plates at intervals are slantly arranged at the axial position of the steering flue close to the flue gas inlet pipe, the upper end of the vertical connecting pipe is connected with a transition pipe, the upper end of the transition pipe is connected with a flow stabilizing pipe, and the flow stabilizing pipe is connected with an evaporation device body above through a diffusing pipe, the evaporation device body comprises an evaporation pipe and a nozzle for being connected with air and compressed air, and the nozzle is located at the middle of the lower end of the evaporation pipe. The flow stabilizing pipe comprises a contraction section, a throat section and a diffusion section. The desulfuration concentrated wastewater treatment device has the advantages that standing time of liquid drops in a reactor can be ensured and it is guaranteed that wastewater is completely dried by evaporation in an evaporation device completely.

Description

technical field [0001] The invention relates to a limestone / gypsum wet desulfurization waste water treatment system, in particular to a desulfurization concentrated waste water treatment device. Background technique [0002] In the limestone / gypsum wet flue gas desulfurization (WFGD) process, in order to ensure the desulfurization efficiency of the desulfurization system, gypsum quality, and prevent equipment corrosion, a certain amount of wastewater needs to be discharged from the system during operation. The existing desulfurization wastewater treatment process generally adopts triple tanks (neutralization-flocculation-sedimentation-clarification, etc.), mainly to reduce the turbidity, heavy metals and a small amount of hardness of wastewater. With increasingly stringent environmental protection requirements, the discharge of desulfurization wastewater will gradually be restricted, and zero discharge will become a development trend. [0003] The current zero discharge pro...

AI Technical Summary

Problems solved by technology

Flue gas direct evaporation technology can be divided into two processes: direct injection in the flue and external evaporation device. The former is greatly affected by the temperature of the flue gas, and the large temperature fluctuation will cause incomplete evaporation of the droplets; the latter is affected by the contact time between the flue gas and the droplets. , The contact method has a great influence, and incomplete evaporation will lead to potential risks such as dust accumulation, scaling and corrosion in the back-end flue and equipment

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