Multi-stage runner type waste water treating device and waste water treating method

Abstract

The invention discloses a multi-stage runner type waste water treating device and a waste water treating method. Specific to the practical condition of large-scale industrial production, an electrochemical oxidizing technology, a catalyzing technology and a separation technology are combined for treating coked waste water (or other organic waste water), so that various organic pollutants such as ammonia nitrogen, phenol, cyanogen and the like in a large amount of drained coked waste water (or other organic waste water) can be removed effectively and completely, and treated drained water is purified fully and reaches the national restricted discharging standard. Moreover, compared with an ordinary chemical oxidizing method and a biochemical method, the method has the advantages of great reduction in the treating cost, easiness in operating, circular running and has very high practical application value.

Description

Technical field [0001] The invention belongs to the technical field of wastewater treatment, relates to a process for the degradation of organic pollutants in wastewater, and specifically relates to a multi-stage flow channel type wastewater treatment device and a wastewater treatment method. Background technique [0002] Coking wastewater is wastewater produced in the process of coal-based coke, gas purification and coking product recovery. The chemical composition is very complex, containing a large amount of ammonia nitrogen, sulfide, cyanide and a variety of biologically toxic organic pollutants, with high color, high toxicity and difficult to be biodegraded. At present, the treatment of coking wastewater in various countries at home and abroad is facing severe problems, the treatment is difficult, and the effluent quality is difficult to meet the standard has become a major problem that has plagued the coking wastewater treatment industry for decades. [0003] In recent ye...

AI Technical Summary

Problems solved by technology

The chemical composition is very complex, containing a large amount of ammonia nitrogen, sulfide, cyanide and a variety of biologically toxic organic pollutants, high chroma, high toxicity and difficult to be biodegraded

At present, the treatment of coking wastewater in various countries at home and abroad is facing severe problems, the treatment is difficult, and the quality of effluent water is difficult to meet the standard, which has become a major problem that has plagued the coking wastewater treatment industry for decades.

[0003] In recent years, many inventors have developed various wastewater treatment devices and technologies through original designs and improved processes. New methods and technologies are constantly being used to treat coking wastewater, but each has its own advantages and disadvantages. The COD and ammonia nitrogen in the effluent and chromaticity are still not satisfactory, it is difficult to meet the national emission standards

In the current coking wastewater treatment process, the equipment and treatment methods used either occupy a large area, or are complex in operation, low in treatment efficiency, high in energy consumption, or high in cost, have secondary pollution, or have poor comprehensive recycling effects, such as: Although the biological oxidation method is low in cost, it occupies a large area, and the concentration of COD and ammonia nitrogen in the effluent is high, so it is difficult to meet the discharge standards; the activated carbon adsorption method has a strong adsorption capacity due to its rich pore size distribution and large specific surface area. Although it can remove COD well, it is easy to be saturated, the concentration of ammonia nitrogen in the effluent is high, and there are also problems such as difficult regeneration of the adsorbent and secondary pollution; although the photocatalytic oxidation method can degrade organic substances that are difficult to biodegrade, However, the operation is complex, the treatment efficiency is very low, the energy consumption is high, and the distance from the actual application is large; in addition, the electrochemical oxidation technology proposed by some scholars in recent years has attracted widespread attention because of its strong oxidative properties, simple process, and no secondary pollution. It has certain limitations in application: there are not many types of electrodes, especially the lack of efficient and cheap electrodes, and the life of the electrodes is not long, the energy consumption is large, and the cost is high

This device can only be used for the separation of oil and water slag, but it cannot carry out pre-degradation treatment of organic wastewater

Images