A kind of semi-coke wastewater treatment system and process

Abstract

The invention discloses a semi-coke waste water treatment system and technology. The system comprises an accident pool (1), a physical and chemical treatment system (2), a biological treatment system (3) and a deep treatment system (4) which are communicated in sequence. The accident pool (1) is connected with the physical and chemical treatment system (2) through a regulating pool (5), the physical and chemical treatment system (2) and the biological treatment system (3) are connected through a water storage pool (6), and the biological treatment system (3) is connected with the deep treatment system (4). The technology comprises the steps of physical and chemical treatment, biological treatment and deep treatment. The treatment effect is obvious, effluent meets the standard, and the whole system and the technology process are high in controllability, low in implementation cost and suitable for application and popularization.

Description

technical field [0001] The invention relates to a semi-coke wastewater treatment system and process, belonging to the technical field of semi-coke wastewater treatment. Background technique [0002] Semi-coke is an important production raw material in the production of ferroalloy, coal gas, and coal chemical industry. It is widely used in industries such as calcium carbide, ferroalloy, fertilizer gas production, blast furnace injection, and civil clean briquette manufacturing. Semi-coke is a product produced in a complex process of a series of physical changes and chemical reactions that occur when coal is heated below 750°C in the absence of air. During the production of semi-coke, a large amount of wastewater containing refractory and toxic substances such as phenol, tar and ammonia will be produced. Its composition is similar to that of coking wastewater, which belongs to high-concentration refractory organic wastewater. Long-term accumulation in the environment will not ...

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Problems solved by technology

During the production of semi-coke, a large amount of wastewater containing refractory and toxic substances such as phenol, tar and ammonia will be produced. Its composition is similar to that of coking wastewater, which belongs to high-concentration refractory organic wastewater. Long-term accumulation in the environment will not only pollute the environment , and will damage human health and affect human life

[0003] The existing blue carbon wastewater treatment process is generally divided into pretreatment process and biochemical treatment process. The wastewater treated by the biochemical treatment process generally still does not meet the comprehensive sewage discharge standard newly stipulated by the state, and the general biochemical treatment method cannot reduce blue carbon. Degradation of refractory substances in charcoal wastewater. In recent years, there have been many studies on the treatment methods of semi-coke wastewater, most of which refer to the coking wastewater treatment process. The low-molecular-weight organic matter has not been completely oxidized, and these low-molecular-weight organic matter is easily taken out by the washing water and enters the production wastewater. Therefore, besides a certain amount of high-molecular organic pollutants, the semi-coke wastewater also contains a large amount of medium-low molecular pollutants, causing its The composition is more complex, and the concentration of pollutants is about 10 times higher than that of coking wastewater. Therefore, the existing treatment processes that refer to the technical route of coking wastewater treatment all have the problems of single treatment technology, poor operability, high implementation cost and failure to meet the discharge standards. question

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