Hardness removing device and method for waste liquid by electric flocculation

An electro-flocculation and waste liquid technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water treatment parameter control, etc. High reactivity and improved removal efficiency

Active Publication Date: 2018-04-10
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0006] Aiming at the problems of high pollution load of oilfield mixed operation waste liquid, large fluctuation range of water quality, and the impact of separated water o

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  • Hardness removing device and method for waste liquid by electric flocculation

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Embodiment

[0049] This implementation provides a waste liquid electroflocculation hard removal device, such as figure 1 As shown, the waste liquid electrocoagulation hard removal device includes a buffer adjustment tank 1, an electrocoagulation reaction tank 2, a water quality adjustment tank 3 and an inclined tube sedimentation separation tank 4, which are connected in sequence;

[0050] The buffer adjustment tank 1 is equipped with a mixer; the entrance and the inside of the electrocoagulation reaction tank 2 are respectively equipped with a water quality online detection system. The water quality online monitoring system is equipped with an automatic water collection and distribution system, a multi-probe online monitoring device and a microcomputer program control module Regular automatic monitoring of water quality indicators through automatic water collection and distribution system and multi-probe online monitoring device to monitor pH, TDS, ORP indicators, and feed back to the mic...

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Abstract

The invention provides a hardness removing device and method for a waste liquid by electric flocculation. The hardness removing device for the waste liquid by electric flocculation comprises a bufferadjusting tank, an electric flocculation reaction tank, a water quality adjusting tank and a sedimentation separation tank which are sequentially communicated; a stirrer is arranged in the buffer adjusting tank; water quality online detection systems are arranged at the inlet of the electric flocculation reaction tank and inside the electric flocculation reaction tank respectively; each system isprovided with an automatic water collection and distribution system, a multi-probe online monitoring device and a microcomputer program control module, wherein water quality and indices of pH, TDS andORP are termly and automatically monitored and fed back to the microcomputer program control module, so that the chain control of reagent addition, aeration intensity and water quality monitoring isrealized; iron or aluminum is adopted as an anode material in the electric flocculation reaction tank, and a pulse type power supply is used for supplying power; the water quality adjusting tank is used for adjusting the pH value of the waste liquid; and the sedimentation separation tank is an inclined tube sedimentation separation tank. According to the invention, the removal efficiency of hardness ions can be effectively improved, and the total hardness removal rate of the waste liquid can reach 80% or above stably.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to a device and method for electrocoagulation and hard removal of waste liquid. Background technique [0002] The operational waste fluids generated during oilfield production operations mainly include waste fluids from acidification, fracturing, well washing, well test and workover, and drilling wastewater. At present, some oil fields are disposed of in the way of centralized storage and tempering treatment. After quenching and tempering, the three phases of oil, water and solid in the waste liquid are separated. The floating oil is recovered after oil separation treatment. Harmful treatment, the separated water enters the joint station and is treated together with the produced water before being reinjected into the formation. [0003] However, due to the complex composition of the operational waste liquid, the separated water has a high load of pollutants su...

Claims

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Application Information

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IPC IPC(8): C02F9/06
CPCC02F1/463C02F1/52C02F1/66C02F9/00C02F2001/46133C02F2201/002C02F2201/4613C02F2201/4614C02F2201/46175C02F2209/04C02F2209/055C02F2209/06C02F2209/10C02F2209/11C02F2209/29
Inventor 张晓飞刘译阳张华罗臻王毅霖
Owner BC P INC CHINA NAT PETROLEUM CORP
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