Wet flue gas desulfurization wastewater treatment system

A wastewater treatment system and wet flue gas desulfurization technology, which are applied in the fields of dehydration/drying/concentrated sludge treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The problems of high investment cost and large amount of dosing can achieve the effect of reducing the load of suspended solids in the influent water, saving operating costs, and preventing re-dissolution

CN104860447BActive Publication Date: 2017-08-25国能朗新明南京环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-08-25

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Abstract

A wet flue gas desulfurization wastewater treatment system, which includes a high-efficiency precipitator (2), characterized in that the high-efficiency precipitator (2) is connected to the desulfurization wastewater water source, and its outlet is discharged from the high-efficiency precipitator through a pipeline The pump (25) and the pH adjustment tank (3) are connected, the pH adjustment tank (3) is connected to the softening reaction tank (7), the softening reaction tank (7) is connected to the settling tank (11), and the settling tank (11) It is connected with the tubular microfiltration membrane (15), and the tubular microfiltration membrane (15) is connected with the backwash water column (16); the backwash water column (16) is connected with the clean water tank (20); the membrane cleaning acid solution metering box (31 ) and the membrane cleaning lye metering box (32) are respectively connected with the cleaning water pump (33); the sludge concentrator (23) is connected with the membrane concentrated liquid discharge electric valve (22) through the pipeline, and the van filter press filtrate discharge electric valve (29), the outlet of the settling tank mud discharge pump (24) is connected. The invention has the characteristics of novel process, compact structure, stable operation, low investment and operation cost.
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Description

technical field

[0001] The present invention relates to a wastewater treatment technology, especially a technology that includes neutralization reaction, softening reaction, sludge-water separation and membrane separation technology of desulfurization wastewater and can effectively remove heavy metal ions, calcium ions, magnesium ions and suspended matter in wastewater Multifunctional treatment technology, specifically a new type of wet flue gas desulfurization wastewater treatment system. Background technique

[0002] At present, a certain amount of desulfurization wastewater will be produced in domestic wet flue gas desulfurization production. The pH value of desulfurization wastewater is 5.0~5.5. The main pollution factors of heavy metals in wastewater are mercury, cadmium, chromium, nickel, and the suspended solids in wastewater are as high as 15000~ 25000 mg / L, the calcium ion in the wastewater is 2000-6000 mg / L, the magnesium ion in the wastewater is 1500-4500 mg / L, an...

Examples

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 shown.

[0024] A new type of wet flue gas desulfurization wastewater treatment system, which includes water inlet electric valve 1, high-efficiency precipitator 2, pH adjustment box 3, pH adjustment box mixer 4, caustic soda metering box 5, caustic soda liquid metering pump 6, softening reaction box 7. Softening reaction box mixer 8, soda ash metering box 9, soda ash liquid metering pump 10, settling tank 11, PH meter 12, liquid level gauge 13, lift pump 14, tubular microfiltration membrane 15, backwash water column 16, clean water tank inlet Water electric valve 17, hydrochloric acid metering box 18, hydrochloric acid metering pump 19, clean water tank 20, clean water tank outlet valve 21, concentrated liquid discharge electric valve 22, sludge concentrator 23, settling tank sludge discharge pump 24, high-efficiency settler sl...