Integrated fluidized catalytic oxidation tower and method for deeply treating wastewater by using same

A catalytic oxidation tower and catalytic oxidation technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of large amount of chemicals and high treatment costs, and reduce output , the effect of enhancement, the effect of increasing the efficiency of mass transfer and the rate of chemical reactions

Inactive Publication Date: 2014-05-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Fenton catalytic oxidation method is an advanced oxidation technology that is widely used in current engineering, but the common Fenton catalytic oxidation technology has the problems of large amount of chemicals and high treatment costs, and a large amount of chemical sludge is generated during the treatment process.

Method used

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  • Integrated fluidized catalytic oxidation tower and method for deeply treating wastewater by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this example, the integrated fluidized catalytic oxidation tower is used to treat the wastewater from the southern miscellaneous wood pulp D0 / C-(EO)PD1 bleaching wastewater after hydrolytic acidification and activated sludge treatment, and the COD of the wastewater cr 350mg / L, BOD 5 It is 55mg / L, and the color is 490C.U.

[0035] The method for treating waste water with an integrated fluidized catalytic oxidation tower comprises the following steps and process conditions:

[0036] 1) Equilibrium adjustment: the waste water in the sump 7 is transported to the equilibrium adjustment unit 1 at the top of the integrated fluidized catalytic oxidation tower through the first water pump 10, and is added in sequence through the first pipeline mixer 14 and the second pipeline mixer 15 at the same time h 2 SO 4 and FeSO 4 ·7H 2 O, the balance adjustment unit 1 is provided with several partitions separated from each other, and the waste water passes through each partition ...

Embodiment 2

[0043] This example is the same as Example 1 except for the following: the integrated fluidized catalytic oxidation tower is used to treat the wastewater produced by the papermaking process of reconstituted tobacco leaves of a certain tobacco sheet enterprise after being treated by UASB and SBR, and the COD of the wastewater cr It is 550mg / L, and chromaticity is 1900C.U.; In the present embodiment, by volume of waste water, FeSO 4 ·7H 2 The addition amount of O is 1375 mg / L, the addition amount of hydrogen peroxide is 825 mg / L, and the addition amount of polyacrylamide is 2.0 mg / L. After treatment, the COD of wastewater cr It is 190mg / L, and the color is 260C.U. While adopting the conventional Fenton treatment method, the COD of the wastewater after treatment cr Between 230-260mg / L, the chromaticity is 400-480C.U., and the processing cost is relatively high.

Embodiment 3

[0045] This example is the same as Example 1 except for the following: the integrated fluidized catalytic oxidation tower is used to treat the wastewater produced by the papermaking process of reconstituted tobacco leaves of a certain tobacco sheet enterprise after being treated by UASB and SBR, and the COD of the wastewater cr It is 550mg / L, and chromaticity is 1900C.U.; In the present embodiment, by volume of waste water, FeSO 4 ·7H 2 The addition amount of O is 825 mg / L, the addition amount of hydrogen peroxide is 1925 mg / L, and the addition amount of polyacrylamide is 1.0 mg / L. After treatment, the COD of wastewater cr It is 160mg / L, and the color is 220C.U. While adopting the conventional Fenton treatment method, the COD of the wastewater after treatment cr Between 230-260mg / L, the chromaticity is 400-480C.U., and the processing cost is relatively high.

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Abstract

The invention discloses an integrated fluidized catalytic oxidation tower and a method for deeply treating wastewater by using the same. A balance adjusting unit of the catalytic oxidation tower is connected with a water distribution pipe at the bottom of a catalytic oxidation unit through a pipeline; the outer side of the upper part of the catalytic oxidation unit is provided with a circulating water tank, the outer side of the circulating water tank is provided with an intermediate water tank, and the top of the circulating water tank is connected with the intermediate water tank through an overflow port; the intermediate water tank is connected with a water distribution pipe of a coagulation sedimentation unit through a pipeline, and a water collecting basin is connected with the balance adjusting unit through a pipeline; the balance adjusting unit is connected with the water collecting basin through a first overflow pipe, and the intermediate water tank is connected with the water collecting basin through a second overflow pipe; a water outlet of a water outlet tank is connected with a clean water basin through a water outlet pipe. By using the integrated fluidized catalytic oxidation tower, the mass transfer efficiency and the chemical reaction speed are effectively increased, the oxidative degradation effect for organic pollutants in wastewater is improved, the dosage of a Fenton reagent can be reduced, and the yield of chemical sludge in the later coagulation process can be reduced.

Description

technical field [0001] The invention relates to a papermaking wastewater treatment device and method, in particular to an integrated fluidized catalytic oxidation tower and a method for advanced wastewater treatment using the same. Background technique [0002] The production process of the pulp and paper industry consumes a large amount of water resources, and these water resources are polluted during the production process and discharged as wastewater. Therefore, the pulp and paper industry is one of the main sources of wastewater and pollutant discharge. Pollutants in pulping and papermaking wastewater are mainly lignin, hemicellulose, and a small amount of cellulose in plant fiber raw materials, which react with pulping and bleaching chemicals and degrade products. Wastewater contains a certain concentration of refractory organic matter and toxic organics. At present, pulp and paper mills generally adopt the technology of physical and chemical treatment combined with s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 雷利荣李友明
Owner SOUTH CHINA UNIV OF TECH
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