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Coking wastewater treatment process and system

A technology for coking wastewater and treatment process, which is applied in special compound water treatment, water/sewage treatment, anaerobic digestion treatment, etc. The effect of reducing energy consumption and high biochemical efficiency

Inactive Publication Date: 2017-04-26
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Advanced oxidation destroys or breaks the chain of refractory organic matter by adding chemicals or under high temperature and high pressure environment. The operation is complicated and the operating cost is relatively high.
Activated carbon has high adsorption efficiency, but it is easily saturated and the operating cost is high

Method used

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  • Coking wastewater treatment process and system
  • Coking wastewater treatment process and system
  • Coking wastewater treatment process and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] Embodiments 1 to 3 are all based on figure 1 The coking wastewater is treated in the middle treatment process flow chart. The main indicators of coking wastewater influent are COD 4600mg / L, ammonia nitrogen 110mg / L, pH value 8.9, volatile phenol 800mg / L, petroleum 100mg / L, chroma 600 times, implementation The process parameters of Examples 1-3 are shown in Table 1.

[0035]

[0036]

[0037] The removal effects of coking wastewater in Examples 1-3 are shown in Table 2.

[0038] COD (mg / L) Ammonia nitrogen (mg / L) Volatile phenol (mg / L) Petroleum (mg / L) Chroma Example 1 75 3.2 0.1 2 50 Example 2 70 4.5 0.08 1.8 60 Example 3 67 5.1 0.07 1.9 60

[0039] It can be seen from Table 2 that the coking wastewater treated by the method of Examples 1-3 has COD<80mg / L, ammonia nitrogen<6mg / L, volatile phenol<0.3mg / L, petroleum <2.5mg / L, and the process effluent is stable , meet the GB16171-2012 Table 2 inline standard.

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Abstract

The invention relates to a coking wastewater treatment process and a coking wastewater treatment system, belonging to the technical field of wastewater treatment. The treatment process comprises the specific step that coking wastewater sequentially enters a pre-treatment system regulating reservoir and an electric flocculation / air flotation reservoir, then enters a biochemical system hydrolysis acidification pool, an anaerobic reactor, an anoxic pond, an aerobic pond and a primary settling pond, and finally enters an adsorption reaction pond and a flocculation and settling pond. In the process, the anaerobic reactor adopts a forced external-circulating type IC reactor, so that the resistance to impact load and biochemical efficiency are improved, and meanwhile, dilution water does not need to be added; activated carbon powder is fed into the anoxic pond, so that the concentration of sludge is improved, and the decarbonizing and denitriding efficacies are improved; the aerobic pond adopts three-gallery type, only a few foams are generated, and defoaming water is not added; a large-bore-diameter adsorbing material is fed into the adsorption reaction pond, so that the organic matters, ammonia nitrogen and the like difficult to degrade and residual in the wastewater are adsorbed, the chroma is removed, and then after flocculation and settling and solid-liquid separation, the obtained water achieves the direct discharging standard in the table 2 of the GB16171-2012.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a coking wastewater treatment process and system. Background technique [0002] Coking wastewater is wastewater produced during the production of coke, gas, tar, and coking products by iron and steel industry coking plants and city gas plants. The water quality is complex and contains many organic and inorganic pollutants, such as ammonia nitrogen, cyanide, and thiocyanate. , phenolic compounds, polycyclic aromatic hydrocarbons (PAHs), nitrogen-containing heterocyclic compounds, oxygen-containing or sulfur-containing heterocyclic compounds, and long-chain aliphatic compounds. [0003] Coking wastewater treatment generally adopts the treatment process of pretreatment→biochemical treatment→advanced treatment. Among them, pretreatment mainly removes oil and suspended solids in wastewater. There are many types of oil in coking wastewater. emulsified oil. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/34
CPCC02F9/00C02F1/463C02F3/02C02F3/28C02F3/2866C02F3/301C02F2103/34C02F2209/14C02F2209/16C02F2305/06
Inventor 赵二华杨世辉余云飞袁玉婷严浩
Owner CISDI ENG CO LTD
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