Desulfurization wastewater concentrating and flue gas drying integrated treatment system and method

Abstract

The invention discloses desulfurization wastewater concentrating and flue gas drying integrated treatment system and method. The desulfurization wastewater concentrating and flue gas drying integrated system comprises a desulfurization wastewater pool arranged at the bottom of a desulfurization tower, a three-stage sedimentation tank connected with the desulfurization wastewater pool and used for pretreatment of desulfurization wastewater, a filter connected with the three-stage sedimentation tank and used for solid-liquid separation, an evaporator connected with the filter and used for concentration of the desulfurization wastewater, a wastewater pool connected with the evaporator and used for storing the concentrated desulfurization wastewater, a water pump connected with the water pool and used for delivering the concentrated desulfurization wastewater, a concentrated desulfurization wastewater evaporation crystallization device connected with the water pump and a bypass flue system connected with a chimney and the concentrated desulfurization wastewater evaporation crystallization device, and the bypass flue system comprises a cyclopneumatic separator used for gas-liquid separation, a dust remover and a fan used for delivering bypass hot flue gas. The desulfurization wastewater concentrating and flue gas drying integrated treatment system is simple in structure and process, the problem about drainage of the desulfurization wastewater is solved, running cost of the system can be effectively reduced, flue gas temperature can be lowered, and heat released to the environment is decreased.

Description

technical field [0001] The invention relates to an industrial wastewater treatment system and method, in particular to a comprehensive treatment system and method for desulfurization wastewater concentration and flue gas drying, belonging to the technical field of environmental protection. Background technique [0002] SO 2 It is one of the main causes of air pollution in my country, and its emissions rank first in the world. The resulting acid rain area accounts for 1 / 3 of the country's land area, and coal-fired power plants are SO 2 main source of emissions. The 2016 National Environmental Protection Work Conference clearly pointed out that my country's sulfur dioxide emissions in 2016 will drop by 3% compared with 2015, which also puts forward higher requirements for thermal power plants with large sulfur dioxide emissions, and has great impact on the reliability of flue gas desulfurization systems in power plants. Sexuality puts forward higher demands. [0003] At pres...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a system and method for comprehensive treatment of waste water concentration and flue gas drying, which uses boiler waste heat to concentrate desulfurization waste water, evaporate and crystallize it, and solve the problem of desulfurization waste water discharge

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