Civil engineering structure pulsating bed activated carbon adsorption system

Abstract

The invention provides a civil engineering structure pulsating bed activated carbon adsorption system which comprises an activated carbon adsorption tank and a carbon distribution, carbon extraction and carbon washing system, the carbon distribution, carbon extraction and carbon washing system is arranged in the activated carbon adsorption tank, a water inlet system is arranged on the activated carbon adsorption tank, a sewage discharge system is arranged on the water inlet system, the water outlet system is arranged below the water inlet system, the carbon inlet distributor is arranged on the sewage discharge system, the activated carbon adsorption tank comprises a filter tank, a tank bottom cone and granular activated carbon, the filter tank is arranged on the side surface of the activated carbon adsorption tank, the tank bottom cone is arranged at the bottom of the activated carbon adsorption tank, and the granular activated carbon is arranged in the activated carbon adsorption tank. According to the invention, the pulsating bed activated carbon adsorption system is adopted, and the filter tank performs normal filtration and adsorption in the carbon discharge / loading process. The filter tank can regularly discharge adsorbed saturated activated carbon, and new activated carbon is filled to ensure stable effluent quality.

Description

technical field [0001] The invention relates to the technical field of activated carbon adsorption systems for civil structures, in particular to a pulsating bed activated carbon adsorption system for civil structures. Background technique [0002] With the improvement of national sewage plant discharge standards, COD discharge needs to be raised from Class A (50mg / l) to quasi-IV class standard (30mg / l). The biochemical process has reached the treatment limit and cannot meet the discharge requirements. Advanced Oxidation For example, Fenton will produce a large amount of inorganic sludge, which does not meet the national emission reduction requirements. Activated carbon is a porous adsorption material that can efficiently absorb COD in water. The saturated activated carbon can be recycled, greatly reducing the cost of sewage treatment, and achieving energy saving and emission reduction. role. [0003] According to the way of water intake and carbon discharge, it can be divi...

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Problems solved by technology

Sewage treatment plants with large volumes of water use steel-structured filters, and the construction cost is too high. Therefore, activated carbon adsorption tanks with civil structures have been developed. Filters are generally underground structures, and the carbon discharge method of activated carbon adopts the method of air lift.

The activated carbon filter adopts the air lift method, the water is fed from the bottom and the water is discharged from the top. When the filter bed is backwashed, the activated carbon gas saturated at the bottom is lifted to the upper part of the filter bed, which violates the layered adsorption law of activated carbon, and the adsorption is saturated in the high-concentration water inlet area. Activated carbon releases COD to the low-concentration effluent area, and the adsorption capacity of activated carbon cannot be fully utilized.

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