Desulfurization wastewater depth treatment system by vibrating membrane electrolytic chlorination combination method

Abstract

The invention relates to a desulfurization wastewater depth treatment system by a vibrating membrane electrolytic chlorination combination method. The system comprises a module and a vibrating mechanism, a circular flat diaphragm is arranged in the module, reciprocating vibration of the diaphragm is achieved in a burdening manner, shear force is formed on a membrane surface, surface crystallization cannot be generated on the membrane surface, crystallized and un-crystallized salinity components pushed to a concentrated liquor opening and then discharged, the vibrating mechanism is arranged onthe lower portion of the module and used for generating reciprocating vibration and comprises a bottom vibrator, a torsion bar is arranged between the vibrator and the module, and the vibrator drivesa module part to vibrate through the torsion bar. The invention further provides a treatment method which is low in energy consumption and investment and high in reuse rate and automation degree and integrally use desulfurization wastewater resources by the latest technology.

Description

Technical field [0001] The invention relates to the technical field of desulfurization wastewater treatment, in particular to an advanced treatment system for desulfurization wastewater by a vibrating membrane plus electrolysis method for producing chlorine. Background technique [0002] Limestone-gypsum wet desulfurization is the mainstream desulfurization process in domestic and international thermal power plants, but the process will produce desulfurization wastewater with high salt content, and its Cl- content can reach 5000 to 20000 mg / L. The existing desulfurization wastewater treatment process only removes heavy metal ions and SS in the water, but due to the limitation of the process principle, the salt removal ability is extremely weak (especially the Cl- has almost no removal ability), which makes Cl- in The water keeps enriching. [0003] With the promulgation and implementation of the "Water Ten Measures", more and more thermal power plants desulphurization wastewater ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are mainly two zero-discharge technologies for desulfurization wastewater: one is the flue evaporation technology. The implementation of flue evaporation is relatively simple, but there are many problems: such as serious fouling of the flue; chloride ions are not removed, but are actually sprayed. In terms of fly ash, it affects the sale of fly ash, turning fly ash from a utilizable resource into an unusable resource; increasing the burden on the dust collector and reducing the efficiency of coal combustion will increase coal consumption, which is inconsistent with the current policy and technical direction; more The system cannot be balanced, and the pipeline system is complex; the wastewater treatment needs to be synchronized with the operation of the power plant, and cannot be operated independently; the pipeline and nozzles are easily blocked if the design is improper; the wastewater is completely evaporated, not recycled, and does not conform to national policies, etc.

This method realizes zero discharge of waste water in the traditional sense, but there are still the following problems: high equipment energy consumption, operating costs of more than 300 yuan / ton of water; MVR main components or all imported, equipment investment is very high; evaporation crystallization is very large , which again pushed up the investment and operating costs of the equipment;

The length of this tunnel is usually more than 2 kilometers, and the diameter is more than 4 meters. The attachment of marine shellfish will greatly reduce the flow area of ​​the tunnel, reduce the amount of circulating cooling water, and affect the safety of the unit.

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