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Chromium-containing wastewater online circulation treatment device and method

A technology for recycling and chromium wastewater, applied in the field of water treatment, can solve the problems of high sludge disposal costs, high treatment costs, large sludge output, etc., and achieve the effects of programming control, high degree of automation, and compact overall structure

Inactive Publication Date: 2019-12-13
CHONGQING NAIDE MACHINERY EQUIP
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a device and method for on-line circulation treatment of chromium-containing wastewater. The device and method are aimed at the high difficulty and high treatment cost of the by-products in the existing electroplating chromium-containing wastewater treatment method, and the heavy metal treatment cannot be achieved. The reuse of ions and the current situation that it is difficult to realize the online recycling treatment of wastewater, propose a new solution and idea
Realize the goal of on-line recycling treatment of electroplating chromium-containing wastewater and recycling of heavy metals; eliminate the problems of large sludge output, high sludge disposal costs, and inability to effectively realize the recovery and recycling of heavy metals in traditional processes

Method used

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  • Chromium-containing wastewater online circulation treatment device and method

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Embodiment

[0040] Such as figure 1 As shown, the present invention provides a process flow diagram of an online circulation treatment device for chromium-containing wastewater. The wastewater is lifted to a slag removal device 1 with a special structure through a water pump. The slag removal device 1 includes an inclined tube sedimentation tank and a clear water tank. The inclined tube sedimentation tank intercepts and settles the impurities and suspended particles in the wastewater to reduce the load of subsequent treatment units. Both the bottom of the inclined tube sedimentation tank and the clear water tank are provided with a funnel-shaped mud hopper; the outside of the equipment is provided with a UPVC mud discharge valve at a corresponding height. The waste water entering the slag removal device 1 flows into the inclined tube sedimentation zone from bottom to top through the gap arranged at the bottom of the clapboard of the inclined tube sedimentation tank. Impurities and flocs ...

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Abstract

The invention provides a chromium-containing wastewater online circulation treatment device which comprises a slag removal device, a filtering device and an adsorption device which are sequentially connected through a pipeline, and the slag removal device is used for removing precipitates and suspended solids in chromium-containing wastewater; the filtering device is used for removing particles inthe chromium-containing wastewater; and the adsorption device is used for adsorbing chromium metal ions. The invention also discloses a method for carrying out online cyclic treatment on the chromium-containing wastewater by using the device. The device and the method are high in treatment efficiency, low in cost and simple to operate, and can realize separation and purification of chromium metalions, and the method is the most promising chromium electroplating wastewater treatment method at present. Through design and optimization of a technical route, near-zero discharge of wastewater andrecovery and cyclic utilization of metal resources can be realized.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an on-line circulation treatment device and method for chromium-containing wastewater. Background technique [0002] The current main technologies for the treatment of chromium-containing wastewater include chemical precipitation, adsorption, electrolysis, membrane separation, biodegradation, and solvent extraction. [0003] Chemical precipitation is the earliest developed electroplating wastewater treatment method. It mainly uses a chemical precipitant to precipitate heavy metals such as Cr(VI) in the electrochrome plating wastewater and separate from the water phase so that the remaining wastewater can be discharged. The early precipitation method is to add BaCl to Cr(VI)-containing wastewater 2 Barium chromate precipitates are formed, and the treated wastewater is discharged directly; the resulting sludge containing barium chromate precipitates is solidif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F9/04C02F101/22C02F103/16
CPCC02F1/001C02F1/28C02F1/42C02F9/00C02F2001/007C02F2001/422C02F2001/425C02F2101/22C02F2103/16C02F2209/005C02F2301/08C02F2303/14C02F2303/16
Inventor 陈志军谢应权
Owner CHONGQING NAIDE MACHINERY EQUIP
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