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Method for deep oxidation treatment of industrial wastewater by ozone

A technology for deep oxidation of industrial wastewater, applied in oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as insufficient mixing effect, avoid secondary pollution, and have large treatment capacity , cost-saving effect

Inactive Publication Date: 2019-06-04
HENAN CHEM IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device for strengthening ozone oxidation wastewater provided by the invention can realize ozone microbubble and pressurize the reaction system at the same time. The rate of mass transfer and the concentration of ozone in wastewater can further improve the utilization rate of ozone. Moreover, the device of this invention has a simple structure and is easy to realize engineering scale-up. However, the turbulence of the gas-liquid mixing pump promotes the mixing of ozone and wastewater, and the mixing effect still insufficient

Method used

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  • Method for deep oxidation treatment of industrial wastewater by ozone
  • Method for deep oxidation treatment of industrial wastewater by ozone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Put the waste water to be treated in the waste water tank, the COD of the original waste water is 75.8mg / L, open the second-stage micro-mixing reactor 1-5, and control the speed at 900r / min, after the operation is stable, open the centrifugal pump 1-7 to adjust the liquid flow Calculate 1-8 as 120L / h, and continuously add 120g / h of catalyst from the catalyst inlet, the catalyst composition is metatitanic acid, metaboric acid, hydrochloric acid (concentration 30%) and water with a mass ratio of 1:0.8:1.5: 20. Adjust the return flow meter to full return flow. Turn on the ozone generator 1-2, adjust the gas flow meter 1-4 to 4.5ml / min, and take the ozone content of the exhaust gas outlet and the COD value of the wastewater outlet water every 10 minutes. After 20 minutes, the COD of the wastewater from the sampling port is 30.5mg / L. Turn off the reflux flowmeter, and start to produce the treated waste water that meets the requirements, and the COD degradation efficiency is 5...

Embodiment 2

[0033] Put waste water to be treated in the waste water tank, the waste water COD is 360mg / L, open the second-stage micro-mixing reactor 1-5, and control the speed at 900r / min, after the operation is stable, open the centrifugal pump 1-7, and adjust the liquid flow meter 1 -8 is 160L / h, continuously add 110g / h of catalyst from the catalyst inlet, the catalyst composition is metatitanic acid, metaboric acid, hydrochloric acid (30% concentration) and water with a mass ratio of 1:1.5:1.5:10 , adjust the reflux flow meter to full reflux. Turn on the ozone generator 1-2, adjust the gas flow meter 1-4 to 4.5ml / min, and take the ozone content of the exhaust gas outlet and the COD value of the wastewater outlet water every 10 minutes. After 25 minutes, the COD of the wastewater from the sampling port is 97.2mg / L. Turn off the reflux flow meter and begin to produce the treated waste water that meets the requirements. The COD degradation efficiency is 73%.

Embodiment 3

[0035] Put waste water to be treated in the waste water tank, the waste water COD is 1740mg / L, open the second-stage micro-mixing reactor 1-5, and control the speed at 900r / min, after the operation is stable, open the centrifugal pump 1-7, and adjust the liquid flow meter 1- 8 is 240L / h, and 160g / h of catalyst is continuously added from the catalyst inlet. The catalyst composition is metatitanic acid, metaboric acid, hydrochloric acid (concentration: 30%) and water with a mass ratio of 1:1:2:15. Adjust the return flow meter to full return flow. Turn on the ozone generator 1-2, adjust the gas flow meter 1-4 to 4.5ml / min, and take the ozone content of the exhaust gas outlet and the COD value of the wastewater outlet water every 10 minutes. After 30 minutes, the COD of the wastewater from the sampling port is 307.06mg / L. Turn off the reflux flow meter and start to produce the treated waste water that meets the requirements. The COD degradation efficiency is 82.35%.

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Abstract

A method for deep oxidation treatment of industrial wastewater by ozone is disclosed, the industrial wastewater from a wastewater tank is subjected to flow rate regulation by a liquid flowmeter and then enters a second-order micro-mixing reactor through a water inlet of the second-order micro-mixing reactor; a catalyst is continuously added into the second-order micro-mixing reactor from a catalyst adding port, and a reflux flow meter is adjusted to achieve full reflux; an ozone generator is started, ozone formed by an ozone generator from oxygen in an oxygen gas storage tank enters the gas inlet of the second-order micro-mixing reactor through a buffer tank and a gas flowmeter, and the ozone in the second-order micro-mixing reactor is fully contacted and reacted with the industrial wastewater; every 10 minutes, the ozone content of a tail gas outlet and the COD value of the water in a wastewater outlet are respectively taken, when the water quality requirement is met, the reflux flowmeter is closed, and the treated wastewater meeting the requirements is collected; the treated wastewater flows out of the water outlet of the second-order micro-mixing reactor, and part of the wastewater and the original wastewater flow back into the second-order micro-mixing reactor, and part of the wastewater is discharged up to the standard; the tail gas after fully reacting is discharged fromthe gas outlet of the second-order micro-mixing reactor to the standard.

Description

technical field [0001] The invention relates to a method for treating industrial wastewater by ozone deep oxidation, belongs to the field of chemical environmental protection, and in particular relates to a method for treating industrial wastewater. Background technique [0002] Chemical wastewater has a large amount of water and complex water quality, and contains a large amount of toxic and harmful substances such as phenols, nitrogen / oxygen / sulfur-containing heterocyclic / aromatic ring organic compounds, polycyclic aromatic hydrocarbons, and cyanide. After chemical wastewater has undergone traditional physical and chemical pretreatment and biochemical treatment, it is often difficult to meet the corresponding wastewater discharge standards, and it is still a typical toxic and harmful biological refractory industrial wastewater, which has become a restrictive problem for the development of the chemical industry. Therefore, advanced treatment of chemical wastewater biochemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F101/30
Inventor 成兰兴张圆春黄蓓张祖玲王倩倩赵增兵赵怡丽杨舒程陈波周涛郭歌阮晨蕾陈蕾陈天天罗智勇
Owner HENAN CHEM IND RES INST
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