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Coking wastewater treatment device and method

A coking wastewater and pretreatment technology, applied in multi-stage water treatment, water/sewage treatment, water treatment parameter control, etc., can solve problems such as low film, high wastewater recovery rate, fouling, etc.

Pending Publication Date: 2022-06-28
BEIJING SHOUGANG INT ENG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve the problems that the removal of chemical oxygen demand (COD) and total nitrogen (TN) is difficult in the process of coking wastewater treatment, and the high COD and hardness of biochemical effluent result in low recovery rate of wastewater from reverse osmosis membrane method and serious membrane fouling.

Method used

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  • Coking wastewater treatment device and method
  • Coking wastewater treatment device and method

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Embodiment

[0023] Embodiments 1 to 3 are based on figure 1 In the process flow chart of the treatment process, the coking wastewater is treated, and the influent volume of the coking wastewater is 100m 3 / h (60m of phenol-cyanide wastewater 3 / h, domestic sewage, shaft seal cooling water, gas pipeline condensate water, initial rainwater totaling 40m 3 / h), the main indicators of influent water are COD≤4500mg / L, ammonia nitrogen≤200mg / L, pH value 6~9, volatile phenols≤1000mg / L, petroleum ≤50mg / L.

[0024] The process operation flow is carried out according to the process steps and flow chart in the content of the invention:

[0025] (1) The coking wastewater pretreatment system is divided into two series, the wastewater first enters the grease trap, and the HRT is 2.5h;

[0026] (2) the coking wastewater after the oil separator treatment in step (1) flows into the flotation tank by gravity, and the HRT is 40min;

[0027] (3) the effluent from the air flotation tank flows into the regu...

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Abstract

The invention discloses a coking wastewater treatment device and method and belongs to the technical field of wastewater treatment. According to the method, the problems of low wastewater recovery rate and serious membrane pollution and blockage caused by high chemical oxygen demand (COD) and total nitrogen (TN) removal difficulty and high biochemical effluent COD and hardness in the coking wastewater treatment process are solved. Wastewater in the coking wastewater treatment device sequentially enters a pretreatment system oil separation tank, an air flotation device and an adjusting tank; the wastewater enters a biochemical system pre-aeration sedimentation tank, a 1 # reflux pump room water suction well, an anoxic tank, an aeration tank, a primary sedimentation tank, a 1 # reflux pump room water suction well, a rear anoxic tank, a rear aeration tank and a secondary sedimentation tank; effluent of the secondary sedimentation tank enters a coagulation reaction tank, a coagulation sedimentation tank and a high-density sedimentation tank for advanced treatment, system sludge enters a sludge treatment system, and a deodorization system finishes collection and treatment of odor of the process system. According to the invention, the impact load resistance and biochemical efficiency of the biochemical system are effectively improved, the quality of effluent treated by the system is improved, and the deep treatment process load is effectively reduced.

Description

technical field [0001] The invention relates to a combined process and system of coking wastewater pretreatment + three-bacteria biochemical treatment + advanced treatment + mud treatment process + biological deodorization, belonging to the technical field of wastewater treatment. Background technique [0002] With the proposed goal of carbon neutrality, the requirements for recycling and zero discharge of coking wastewater are becoming more and more urgent. But in fact, due to its complex water quality, high toxicity, and refractory degradation, it is difficult to achieve coking wastewater treatment and advanced treatment through one or two process technologies, which has caused serious obstacles for subsequent membrane recycling and zero discharge. Therefore, the treatment and advanced treatment of coking wastewater requires a set of process routes with stable operation to achieve the goal of recovery and zero discharge of coking wastewater. SUMMARY OF THE INVENTION [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/127C02F1/40C02F1/24C02F3/30C02F1/52C02F1/56C02F3/34
CPCC02F9/00C02F11/127C02F1/40C02F1/24C02F2001/007C02F3/302C02F1/5245C02F1/56C02F3/34C02F2209/06C02F2209/08C02F2209/14C02F2209/16C02F2209/10C02F2303/02C02F2301/08
Inventor 金常林马昕刘华利张磊
Owner BEIJING SHOUGANG INT ENG TECH
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