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A combined process and system for efficiently treating coal chemical wastewater

A technology of coal chemical wastewater and combined system, which is applied in natural water treatment, water/sewage treatment, sustainable biological treatment, etc. The effect of continuous accumulation of concentration and convenient comprehensive utilization

Active Publication Date: 2019-11-05
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned process uses pretreatment and anoxic-aerobic biological process to treat coal chemical wastewater. Although it can remove most of COD and ammonia nitrogen in the water, it cannot remove heavy metals in the water at the same time, and the traditional process requires an external carbon source, which consumes energy. , increase the floor area, and cause secondary pollution, and although the effluent quality can meet the secondary discharge standard in the sewage discharge standard, it still contains a certain amount of COD and NH 3 -N, which makes the subsequent deep desalination treatment difficult

Method used

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  • A combined process and system for efficiently treating coal chemical wastewater
  • A combined process and system for efficiently treating coal chemical wastewater
  • A combined process and system for efficiently treating coal chemical wastewater

Examples

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Embodiment 1

[0042] This embodiment provides a combined system for efficient treatment of coal chemical wastewater, the flow chart of which is as follows figure 1 As shown, it includes sequentially connected settings: an adjustment tank, the coal chemical industry wastewater enters the adjustment tank, and the pH value of the coal chemical industry wastewater is adjusted in the adjustment tank and treated by adding a flocculant; anaerobic treatment device, The effluent of the regulating pool enters the anaerobic treatment device; the whole process autotrophic denitrification reactor, and the wastewater treated by the anaerobic treatment device enters the full process autotrophic denitrification reactor for denitrification; the ecological pool, the The water inlet of the ecological pool is communicated with the outlet of the full autotrophic denitrification reactor, and an aeration device is arranged at the bottom of the ecological pool; a nanofiltration membrane device 25 is arranged in the...

Embodiment 2

[0055] This embodiment provides a combined system for efficient treatment of coal chemical industry wastewater, including: a regulating pool connected in sequence, the coal chemical industry wastewater enters the regulating pool, and the coal chemical industry wastewater is adjusted in the regulating pool pH value and adding flocculant for treatment; anaerobic treatment device, the effluent of the adjustment tank enters the anaerobic treatment device; the whole process autotrophic denitrification reactor, the wastewater treated by the anaerobic treatment device enters the whole process The autotrophic denitrification reactor carries out denitrification; the ecological pool, the water inlet of the ecological pool is connected with the outlet of the full autotrophic denitrification reactor, and an aeration device is arranged at the bottom of the ecological pool; The nanofiltration membrane device 25 is arranged in the ecological pool, and the nanofiltration membrane device 25 is ...

Embodiment 3

[0069] The combined system for efficient treatment of coal chemical wastewater in this embodiment is the same as that of Embodiment 1 and Embodiment 2, such as figure 1 As shown, including sequentially connected settings: regulating pond, anaerobic treatment device, full autotrophic denitrification reactor, ecological pond and rotary evaporation device. Wherein the bottom of described ecological pond is provided with aeration device; In described ecological pond, be provided with nanofiltration membrane device 25, described nanofiltration membrane device 25 is arranged near the air outlet of described aeration device; The membrane outlet side of device 25 is communicated with and is provided with water outlet; On the water surface of described ecological pool, ecological floating bed 19 is placed, and plant 20 is planted on described ecological floating bed 19; Water outlet connection setting.

[0070] The full autotrophic denitrification reactor described in this embodiment ...

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Abstract

The invention provides an ecological pool and an efficient coal chemical engineering waste water treatment system and process based on the ecological pool. The system comprises an adjusting pool, an anaerobic treatment device, a whole-process autotrophic nitrogen removal reactor, the ecological pool and a rotary evaporation device which are sequentially connected and arranged. The adjusting pool is used for adjusting the pH value of coal chemical engineering waste water and adding a flocculant for treatment; the waste water treated by the anaerobic treatment device enters the whole-process autotrophic nitrogen removal reactor for nitrogen removal; the ecological pool is provided with a nanofiltration membrane device, an ecological floating bed is arranged on the water level of the ecological pool, and an aeration device is arranged on the bottom layer of the ecological pool. Filtrate obtained after filtering of the nanofiltration membrane device enters the rotary evaporation device. Clean effluent quality is obtained through the adjusting pool, the anaerobic treatment device, the whole-process autotrophic nitrogen removal reactor, the ecological floating bed and the aeration device in the ecological pool, blocking of a nanofiltration membrane can be effectively reduced, and the service life of the nanofiltration membrane can be prolonged. The whole process has the advantages of being low in energy consumption and free of secondary environmental pollution.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a combined process and system for efficiently treating coal chemical wastewater. Background technique [0002] The wastewater discharged by coal chemical enterprises is mainly high-concentration coal gas washing wastewater, which contains a large amount of toxic and harmful substances such as organic matter, salts, ammonia nitrogen and heavy metals. The discharge of coal chemical wastewater will lead to serious water pollution. In order to protect the ecological environment, my country requires that all production wastewater generated in the coal chemical industry during the production process should be used for reuse and not discharged to the outside world, that is, to achieve "zero discharge". However, due to the large amount of coal chemical wastewater and the complex composition of pollutants, it has brought great difficulties to wastewater treatment. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/12C02F9/14C02F1/04C02F1/52C02F1/66C02F103/34
CPCC02F1/048C02F1/52C02F1/66C02F3/1268C02F3/327C02F9/00C02F2103/34Y02W10/10
Inventor 张莉杨嘉春王圣瑞李文章王曙光
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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