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Desulfurization wastewater resourceful treatment system and application method

A technology for desulfurization wastewater and treatment system, which is applied in gaseous effluent wastewater treatment, water/sewage treatment, chemical instruments and methods, etc. It can solve the problems of alkalization, water mineralization, resource waste, etc. Treatment cost and effect of saving water resources

Pending Publication Date: 2019-02-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Desulfurization wastewater from coal-fired power plants is mostly treated by physical and chemical methods. Although the treated wastewater can meet the discharge standards, the content of salt and chloride ions is still high, resulting in mineralization of water bodies and alkalization of soil, and waste of resources.

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  • Desulfurization wastewater resourceful treatment system and application method
  • Desulfurization wastewater resourceful treatment system and application method

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Embodiment Construction

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] The present invention includes:

[0040] Reaction tank (8), it is used for separating calcium ion, and the water inlet of described reaction tank (8) is connected with the coagulation reactor (6) top, and the water outlet of described reaction tank (8) is passed through pump (9) ) is connected to the water inlet of tubular membrane 1 (10). Pass the primary supernatant into the reaction tank (8), control the pH to 8.0-8.5 with sodium hydroxide solution, pass carbon dioxide gas into it from the bottom, generate calcium carbona...

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Abstract

The invention relates to a desulfurization wastewater resourceful treatment method. The desulfurization wastewater resourceful treatment method comprises the following steps: homogenizing, pretreating, separating calcium carbonate from carbon dioxide in flue gas, preparing magnesium hydroxide by adding ammonia water, and preparing sodium hypochlorite by electrolyzing, thereby realizing the comprehensive utilization of resources in the desulfurization wastewater softening process. In the treatment process, all produced water can reversely flow to the front end for continuous treatment; the zerodischarge of desulfurization wastewater is realized; meanwhile water resources are saved; and the treatment cost of desulfurization wastewater is reduced. The desulfurization wastewater resourceful treatment method recycles the desulfurization wastewater of power plants and the flue gas of desulfurizing towers to the maximum extent and has great guiding significance for control on the environmental pollution caused by the power plants.

Description

technical field [0001] The invention belongs to the technical field of desulfurization wastewater treatment, and in particular relates to a method for resourceful treatment of desulfurization wastewater. Background technique [0002] Wet limestone gypsum flue gas desulfurization is a technology commonly used in coal-fired power plants in my country to treat desulfurization wastewater. The wet limestone gypsum flue gas desulfurization system will generate desulfurization wastewater in actual operation. The pH value of the desulfurization wastewater is generally between 4 and 6. The desulfurization wastewater contains a large amount of gypsum, fly ash and sulfate suspended particles. The desulfurization wastewater contains The cations are mainly calcium, magnesium, sodium ions and a small amount of heavy metal ions. The concentration of chloride ions in anions can be as high as 20000mg / L. If the desulfurization wastewater is directly discharged into the environment, it will b...

Claims

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Application Information

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IPC IPC(8): C02F9/04C01F11/18C01F5/22C02F103/18
CPCC01F5/22C01F11/18C02F9/00C02F2103/18C02F1/441C02F1/442C02F1/444C02F1/62C02F1/56C02F1/78C02F1/40C02F1/001
Inventor 刘松涛刘涵露陈传敏冯荣荣谷兴家冯洪达孙明坤王宇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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