Wastewater zero-discharge system for multi-stage treatment and method of system

A zero-discharge, waste water technology, applied in water/sewage multi-stage treatment, gas treatment, separation methods, etc., can solve the problems of high pump power, large filtration pressure difference, low economic efficiency of membrane concentration system, etc., to reduce waste water treatment volume effect

Inactive Publication Date: 2020-03-06
北京铝能清新环境技术有限公司
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Problems solved by technology

When the desulfurization wastewater is concentrated with a filter membrane, due to the high salt content of the desulfurization wastewater and the large amount of impurities in the water quality, the filter membrane is often blocked, and some impurities in the desulfurization wastewater are likely to cause membrane poisoning. The operation needs to

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  • Wastewater zero-discharge system for multi-stage treatment and method of system
  • Wastewater zero-discharge system for multi-stage treatment and method of system

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Embodiment Construction

[0039] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0040] Such as Figure 1 ~ Figure 2 As shown, the waste water zero discharge system for multi-stage treatment of the present invention includes a boiler, a denitrification system, a dry flue gas system, a desulfurization system, a waste water delivery system, a waste water concentration system, a waste water spray evaporation system, and a concentrated flue gas system, wherein the boiler , denitrification system, dry flue gas system, desulfurization system, waste water conveying system, waste water concentration system and waste water spray evaporation system are connected sequentially. connect.

[0041] Concrete operation principle of the present invention and step are as follows:

[0042] The desulfurization wastewater enters the concentrator 10 thro...

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Abstract

The invention provides a wastewater zero-discharge system for multi-stage treatment and a method of the system. The system comprises a boiler, a denitration system, a dry flue gas system, a desulfurization system, a wastewater conveying system, a wastewater concentration system, a wastewater spray evaporation system and a concentrated flue gas system, wherein the boiler, the denitration system, the dry flue gas system, the desulfurization system, the wastewater conveying system, the wastewater concentration system and the wastewater spray evaporation system are sequentially connected with oneanother; the wastewater concentration system is connected with the desulfurization system through the concentrated flue gas system; and the wastewater spray evaporation system is also connected with the dry flue gas system. According to the wastewater zero-discharge process for multi-stage treatment, secondary utilization of system waste heat is realized, operation energy consumption is reduced, and thus high-efficiency and stable zero discharge of desulfurization wastewater is realized.

Description

technical field [0001] The invention relates to the technical field of waste water treatment of flue gas wet desulfurization process, in particular to a multi-stage treatment waste water zero discharge system. Background technique [0002] At present, in the field of flue gas desulfurization of thermal power plants in my country, limestone-gypsum wet desulfurization has a market share of about 85%. The by-products of the wet desulfurization process include gypsum and desulfurization wastewater. The slurry in the desulfurization absorption tower is regularly discharged to control the concentration of harmful elements such as Cl-, F and heavy metals in the limestone slurry in the desulfurization absorption tower, which cause the slurry reaction ability to decrease. Reduce the concentration of fine dust particles in the slurry to ensure the normal and stable operation of the desulfurization system. [0003] As my country's environmental protection requirements become increasin...

Claims

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Application Information

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IPC IPC(8): C02F1/16C02F1/12C02F9/10B01D1/18B01D1/30B01D53/78B01D53/56C02F103/18
CPCB01D1/18B01D1/30B01D53/56B01D53/78B01D2258/0283C02F1/12C02F1/16C02F1/44C02F9/00C02F2103/18
Inventor 唐朝勇傅海波李永艳王彦玲王逸凡
Owner 北京铝能清新环境技术有限公司
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