Coal chemical wastewater treating technique

A coal chemical wastewater and wastewater treatment technology, applied in biological water/sewage treatment, heating water/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of large amount of adsorbent, high COD value and high cost, and achieve The effect of good economic and social benefits

Inactive Publication Date: 2009-10-21
POTEN ENVIRONMENT GRP
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Problems solved by technology

This method can achieve good results, but there are problems such as large amount of adsorbent, high cost and secondary pollution, etc. It is generally suitable for small-scale sewage treatment applications
[0007] Moreover, the process of treating w...

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  • Coal chemical wastewater treating technique

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Embodiment Construction

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0026] figure 1 It is a process flow chart of the coal chemical industry wastewater treatment process of the present invention. Such as figure 1 As shown, the process includes the following steps:

[0027] Step 10, pretreating the coal chemical industry wastewater through an air flotation device to obtain pretreated wastewater.

[0028] Excessive oil in wastewater will affect the effect of subsequent biochemical treatment. The role of air flotation method for coal chemical wastewater pretreatment is to remove oil and recycle it. In addition, air flotation is useful for separating inorganic and organic suspended solids and removing dissolved substances in water. Sexual organics also have some effect.

[0029] Ste...

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Abstract

The invention relates to a coal chemical wastewater treating technique, which comprises the following steps of: pretreating the coal chemical wastewater by an air-floatation device and obtaining pretreated wastewater; adding a fenton reagent into the pretreated wastewater to carry out secondarily treatment and obtaining secondarily treated wastewater; putting the secondarily treated wastewater into an activated sludge aeration pool and adding active carbon powder into the pool for deep treatment to obtain deeply treated wastewater; separating the deeply treated wastewater with a hyperfiltration membrane and obtaining separated recycled water; reversely penetrating the separated recycled water with a selective semi-permeable membrane and obtaining reversely penetrated recycled water; evaporating and crystallizing the reversely penetrated recycled water and finishing the wastewater treatment. The wastewater, after treated by the coal chemical wastewater treating technique, can realize the 'zero discharge' standard, meet the national environmental requirements, and obtain good economic and social benefits.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a coal chemical wastewater treatment process applied in the coal chemical industry. Background technique [0002] The coal chemical industry uses coal as a raw material and undergoes chemical processing to convert coal into gas, liquid, solid fuel and chemical products. It is mainly divided into coal coking, coal gasification, coal gasification to ammonia, coal gasification to other products, and direct liquefaction. . The wastewater produced in the coal chemical industry is a high-concentration organic wastewater with high chemical oxygen demand (Chemical Oxygen Demand, COD for short), high ammonia nitrogen content index, high chroma and high turbidity. [0003] The process for treating wastewater generated in the coal chemical industry in the prior art generally includes three steps, namely a pretreatment method, a secondary treatment method and an advanced treatment method. ...

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Application Information

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IPC IPC(8): C02F9/14C02F1/24C02F3/12C02F1/28C02F1/44C02F1/04
CPCY02W10/10
Inventor 王少艮李扬缪冬塬俞彬
Owner POTEN ENVIRONMENT GRP
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