Treatment method of limestone wet process desulfurization waste water and device
A technology of wet desulfurization and treatment equipment, which is applied in the direction of degassed water/sewage treatment, gaseous effluent wastewater treatment, multi-stage water treatment, etc., and can solve the problems of large amount of dosing, inability to realize resource utilization, and large amount of sludge , to achieve the effect of reducing treatment cost, continuous and stable treatment effect, and realizing recycling
Pending Publication Date: 2019-03-22
SHANGHAI JIANGZHE ENVIRONMENT ENG TECH CO LTD
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[0021] In order to solve the problems in the prior art that the amount of dosing is large, the generated sludge is large and the resource utilization cannot be achieved, the purpose of the present invention is to provide a treatment method for limestone wet desulfurization wastewater and a device using the treatment method
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[0053] A treatment device for limestone wet desulfurization wastewater, comprising a wastewater collection box 1, an electrocoagulation treatment unit 2, a softening treatment unit 3, a microfiltration treatment unit 4, a CO2 stripping treatment unit 5, a nanofiltration treatment unit 6, and a reverse osmosis treatment unit Unit 7 , material membrane separation unit 22 , membrane distillation treatment unit 9 and MVR evaporation treatment unit 10 .
[0054] Pollutants in the waste water collection tank 1 are mainly non-metal ions, heavy metal ions and suspended solids. Pollutants in the waste water collection tank 1 are passed into the electrocoagulation treatment unit 2 to remove heavy metal ions and suspended matter.
[0055] The electrocoagulation treatment unit 2 includes a reaction tank 8, the bottom of one side of the reaction tank 8 is provided with a water inlet, the upper part of the other side of the reaction tank 8 is provided with a water outlet, and the bottom is ...
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The invention discloses a treatment method of limestone wet process desulfurization waste water and a device using the method. According to the desulfurization waste water treatment method, inorganicacid is added during CO2 blowing treatment. Compared with a conventional treatment process, the method has the advantages that the addition of chemicals is reduced; the treatment cost is reduced. Thedesulfurization waste water treatment method generates sludge in an electric flocculation treatment unit and a micro filtering treatment unit; no sludge is generated in other links. Compared with a conventional process, the method has the advantages that generated sludge is reduced; the sludge treatment difficulty and the treatment cost are reduced. The influence of the desulfurization waste watertreatment method caused by desulfurization waste water ingredients is small; the continuous stability of the treatment effect is ensured. The desulfurization waste water treatment method realizes theresourceful utilization of the waste water; sodium sulfate with the purity being 98.5 percent and sodium chloride with the purity being 98 percent are obtained; meanwhile, impurities contained in second fresh water, third fresh water, fourth fresh water and fifth fresh water are few; the industrialized water use standard is reached; the cyclic reutilization is realized.
Description
technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for limestone wet desulfurization wastewater and a device using the method. Background technique [0002] The impurities in limestone wet desulfurization wastewater mainly come from flue gas and desulfurization agent, among which the flue gas comes from the combustion of coal, and the desulfurization agent is limestone; because coal may contain various elements including heavy metals, such as F, Cl, Cd , Pb, Ni, As, Se, Cr, etc. These elements undergo a series of chemical reactions under high temperature conditions in the furnace to form a variety of different compounds. Part of the compound is discharged from the furnace with the slag, and the other part enters the absorption tower of the desulfurization device with the flue gas and is dissolved in the desulfurizer. [0003] Desulfurization wastewater mainly includes suspended solids, supersatura...
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Patent Timeline
Login to View More IPC IPC(8): C02F9/10C01D5/00C01D3/04C02F103/18
CPCC01D3/04C01D5/00C02F1/041C02F1/20C02F1/441C02F1/442C02F1/444C02F1/447C02F1/463C02F5/02C02F9/00C02F2101/101C02F2101/20C02F2103/18C02F2209/055C02F2209/10C02F2301/046C02F2301/08
Inventor 王开江
Owner SHANGHAI JIANGZHE ENVIRONMENT ENG TECH CO LTD