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Desulfurized waste water treatment method and system

A technology for desulfurization wastewater and treatment method, which is applied in gaseous effluent wastewater treatment, multi-stage water treatment, water/sewage treatment, etc. The effect of small area and simple process

Inactive Publication Date: 2016-05-04
CEEP CO LTD
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Problems solved by technology

[0003] At present, the commonly used desulfurization wastewater treatment technologies mainly include chemical softening + ultrafiltration + reverse osmosis, chemical softening + multi-effect evaporation. Both methods are based on the recovery of treated water. This method can recover part of the desulfurization wastewater, but There are problems such as high investment and operating costs, and small water recovery

Method used

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  • Desulfurized waste water treatment method and system

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Embodiment Construction

[0026] Aeration adjustment tank 1, pH adjustment tank 2, primary reaction settling tank 3, primary flocculation tank 4, primary clarification tank 5, secondary reaction settling tank 6, secondary flocculation tank 7, secondary clarification tank 8, intermediate Pool 9, multimedia filter 10, sludge balance tank 11, plate and frame filter press 12, spiral atomizing nozzle 13.

[0027] (1) The desulfurization wastewater enters the aeration regulating tank 1, and under the action of the aeration device, the sulfite ions in the desulfurization wastewater are oxidized to sulfate ions to remove some pollutants and reduce the COD of the desulfurization wastewater. The ultrasonic liquid level gauge monitors the liquid level of the aeration regulating tank 1, and automatically controls the operation of the wastewater lifting pump. The desulfurization wastewater is transported to the pH adjustment tank 2 through the wastewater lift pump.

[0028] (2) Add a certain amount of lime to the ...

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Abstract

The invention provides a desulfurized waste water treatment method. The method comprises the steps that 1, desulfurized waste water enters an aeration adjusting pool, and sulfite ions in the desulfurized waste water are oxidized into sulfate ions under the action of an aeration device; 2, the desulfurized waste water is conveyed into a pH adjusting box, and lime is put into the pH adjusting box to relieve temporary hardness; 3, in a first-level reaction settling box, organic sulfur is added for further depositing heavy metal which can not be deposited in a hydroxide form; 4, in a first-level flocculation box divided into two cases, coagulant is added, many tiny floccules are condensed and formed; 5, the tiny floccules are conveyed into a first-level clarification tank so that the generated floccules and suspended solids in the waste water can be deposited and separated; 6, sodium carbonate and a sodium hydroxide solution are added into a second-level reaction settling box, and calcium ions and remaining magnesium ions in the waste water are deposited; a second-level clarification tank is used for depositing and separating the generated floccules; water produced by a multi-medium filter is sprayed into a flue to be vaporized through a spiral atomizing nozzle.

Description

1. Technical field [0001] The invention relates to the treatment of desulfurization wastewater in thermal power plants, and relates to a desulfurization wastewater treatment method and system. 2. Background technology [0002] With the rapid development of my country's energy industry and the construction of large-scale coal-fired power plants, fuel consumption continues to increase, SO 2 emissions are increasing. Currently, flue gas desulfurization is considered to be an effective way to control SO 2 The most efficient way to reduce emissions. Limestone-gypsum wet flue gas desulfurization is the most widely used and most mature desulfurization process in the world. The desulfurization wastewater produced by the limestone-gypsum wet method has a pH of 4-6 and contains a large amount of suspended matter (gypsum particles, SiO 2 , Al and Fe hydroxides), fluorides and various heavy metal ions (As, Cd, Cr, Hg, etc.), with high hardness and high salt content. Direct discharg...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F103/18
CPCC02F9/00C02F1/001C02F1/12C02F1/52C02F1/66C02F1/74C02F5/02C02F2101/101C02F2101/14C02F2101/20C02F2103/18C02F2301/08
Inventor 高占平齐岩山史宇涛朱雪梅崔程
Owner CEEP CO LTD
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