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Coking wastewater comprehensive treatment method and system thereof

A coking wastewater and comprehensive treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of water quality that cannot meet the national first-level discharge standard, ammonia nitrogen, COD removal rate Low efficiency, reduced service life and other problems, to achieve the effect of solving the low removal rate of ammonia nitrogen and COD, high operating cost, and protecting the environment

Inactive Publication Date: 2014-05-07
浙江晶泉水处理设备有限公司
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Problems solved by technology

[0003] The traditional treatment process has a low removal rate of ammonia nitrogen and COD, and the water quality after pretreatment and biochemical treatment still cannot meet the national first-level discharge standard
In recent years, two-stage reverse osmosis devices have been used in the advanced treatment of coking wastewater, which has greatly improved the removal of ammonia nitrogen and COD. Frequent flushing will cause greater damage to the membrane and greatly reduce the service life, which increases the cost of investment and operation

Method used

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  • Coking wastewater comprehensive treatment method and system thereof

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] figure 1 Shown is coking wastewater comprehensive treatment method of the present invention, concrete operation is as follows:

[0021] The coking wastewater enters the degreasing tank 1 to remove tar, and the tar is discharged into the oil storage tank 20 for storage. The effluent of oil removal tank 1 flows into the adjustment tank 2, and the adjustment tank 2 adds oxidant to remove phenols, and adds NaOH or Ca(OH) 2 Adjust the pH to 6-9, and then flow the wastewater into the air flotation tank 3, remove the substances with a density lower than water through the air flotation tank 3, add a flocculant to flocculate and precipitate the suspended matter, remove heavy metals and cyanide, etc. The scum is automatically discharged into the slag storage tank 21. After pretreatment, the water quality basically meets the requirements of s...

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Abstract

The invention discloses a coking wastewater comprehensive treatment method comprising the following steps of: pre-treatment, biochemical treatment and deep treatment. The deep treatment step comprises sequential steps of filtering, ultra-filtering, carrying out resin adsorption, re-filtering, and carrying out reverse osmosis. With the adoption of a coking wastewater comprehensive treatment system of the coking wastewater comprehensive treatment method, the pre-treatment step adopts a de-oiling pond, an adjusting pond and an air floating pond, which are connected in sequence; the biochemical treatment step adopts a primary aeration pond, a primary settling pond, an oxygen-poor pond, an aerobic pond and a secondary settling pond, which are connected in sequence; and the deep treatment step adopts a multi-medium filter, an ultra-filtering device, a resin adsorption column and a reverse osmosis device. The coking wastewater comprehensive treatment method has the beneficial effects that the method is stable to operate and has a simple process and good treating effects.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a comprehensive treatment method and system for coking wastewater. Background technique [0002] Coking wastewater is produced in the process of high-temperature dry distillation of coal, gas purification and rectification of chemical products. Its composition and properties are closely related to raw coal quality, carbonization temperature, production technology and recovery methods of chemical products. It is a kind of waste water containing a large amount of toxic and harmful Substance waste water is quite harmful to the environment. There are two basic ways to solve the problem of coking wastewater pollution: one is to reform the process, strengthen operation management, reduce production water, directly reduce discharge, reduce waste water, repeat and recycle water, and fundamentally eliminate and reduce pollutant discharge; The second is to carry out relevant treatment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/42C02F1/44
Inventor 李杰张丽芬胡勤阳
Owner 浙江晶泉水处理设备有限公司
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