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Device and method for treating chemical wastewater

A technology for treating device and chemical wastewater, applied in the field of energy saving and environmental protection, can solve problems such as low treatment cost, and achieve the effects of improving biodegradability, reducing load, and realizing resource recovery

Active Publication Date: 2015-01-14
SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among these technical applications, most of them are the organic combination of physical and biochemical treatment technologies to minimize the treatment cost, and some use advanced oxidation technology to optimize the quality of effluent water, but there is rarely a universal and reasonable treatment process to deal with these waste water

Method used

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  • Device and method for treating chemical wastewater
  • Device and method for treating chemical wastewater
  • Device and method for treating chemical wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1: The treated waste water is coal medium-temperature coking waste water, and the flow rate is 10m3 / h, COD Cr (COD stands for chemical oxygen demand, which refers to the amount of oxidant consumed to oxidize reducing substances in 1L of water samples under certain conditions, expressed as the mass concentration of oxygen (in mg / L) to measure chemical oxygen demand The standard method is the potassium dichromate method. The chemical oxygen demand measured by the potassium dichromate method is called CODcr.) The value is 50000mg / L, the oil content is 2500mg / L, the total phenol content is 16000mg / L, and the ammonia nitrogen content is 4000mg / L, SS (suspended solids) about 880mg / L. After being treated by a phase separator, the non-emulsified oil can be basically removed and recovered, and the COD is reduced to 39800mg / L. After two-stage enhanced extraction process and two-stage steam enhanced blow-off process, COD decreased to 7164mg / L, total phenol decreased t...

Embodiment 2

[0052] Embodiment 2: The treated waste water is coal tar catalytic waste water, and the flow rate is 6m 3 / h, COD Cr The value is 60000mg / L, the oil content is 13000mg / L, the total phenol content is 25000mg / L, the ammonia nitrogen content is 15000mg / L, and the sulfide content is 21000mg / L. After being treated by a phase separator, the non-emulsified oil can be basically removed and recovered, and the COD is reduced to 51120mg / L. After the three-stage enhanced extraction process and the first-stage steam enhanced stripping process, the COD decreased to 3500mg / L, the oil content decreased to 48mg / L, the total phenol decreased to 700mg / L, the ammonia nitrogen decreased to 500mg / L, and the sulfide decreased to 20mg / L. Because the COD is higher than 2000mg / L at this time, the enhanced oxidation process cannot be used, but the anaerobic process must be used. After being treated by anaerobic expanded granular sludge bed (EGSB) and circulating flow biosynergistic reactor, the water...

Embodiment 3

[0053] Embodiment 3: The treated waste water is coal gas waste water, and the flow rate is 15m 3 / h, COD Cr The value is 25000mg / L, the oil content is 1000mg / L, the total phenol content is 7500mg / L, and the ammonia nitrogen content is 8000mg / L. After being treated by a phase separator, the non-emulsified oil can be basically removed and recovered, and the COD can be reduced to 20500mg / L. After the secondary enhanced extraction process and the secondary steam enhanced stripping process, COD decreased to 1800mg / L, oil content decreased to 35mg / L, total phenol decreased to 650mg / L, and ammonia nitrogen decreased to 80mg / L. Because the COD is lower than 2000mg / L at this time, the enhanced oxidation process can be adopted. After enhanced oxidation by ultraviolet catalyzed hydrogen peroxide, the COD will be reduced to 1320mg / L, the oil content will be reduced to 28mg / L, the total phenols will be reduced to 85mg / L, and the ammonia nitrogen content will be basically unchanged, BOD ...

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Abstract

The invention relates to a device and a method for treating chemical wastewater. The method comprises the following steps: firstly, performing pretreatment operations such as filtration and phase separation so as to remove solids, recover tar and reduce the load of subsequent treatment; secondly, further removing pollution indexes such as COD (Chemical Oxygen Demand), phenols and ammonia, and meanwhile, improving the biodegradability of the wastewater, by use of a series of strengthening processes such as strengthened phenol removal, strengthened ammonia removal and strengthened oxidation; treating the wastewater until the wastewater is up to the drainage standard by use of a circulation flow synergistic treatment process after selective anaerobic biological treatment; and finally, separating biological sludge from clear water by virtue of membrane treatment, and performing up-to-standard drainage or low-grade recycling on the clear water. The method for treating the chemical wastewater is capable of realizing up-to-standard treatment or recycling on the chemical waste water, so that the goal of water environment protection is realized; besides, tar and phenols in the wastewater are recovered to achieve the goal of resource recovery.

Description

technical field [0001] The invention belongs to the technical field of energy saving and environmental protection, and in particular relates to a chemical wastewater treatment device and method which have a wide application range, good wastewater treatment effect, and simultaneously realize the recovery of tar and phenol in the wastewater. Background technique [0002] Enterprises such as coal gasification, coal coking, semi-coke, coal light conversion, and oil refineries will produce refractory organic wastewater containing tar, ammonia nitrogen, and phenols in the production process. The types of pollutants in these wastewater are similar, although the concentration Both are high, but the concentrations vary considerably. There are many treatment methods recorded in the literature, such as oil separation, coagulation, precipitation, adsorption, extraction, stripping, etc. in pretreatment, hydrolytic acidification, A / O process, SBR in biochemical treatment, and Fenton in ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/20C02F1/26C02F1/32C02F1/44C02F1/72C02F1/722C02F3/00C02F3/28C02F9/00C02F2301/08
Inventor 杨积志张俊余峻峰
Owner SHANGHAI ANHORN ENVIRONMENTAL TECH CO LTD
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