A method and device for treating industrial wastewater

A technology for industrial wastewater and treatment methods, applied in natural water treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. The effect of reducing flushing water consumption, strong resistance to fouling and blocking, and improving utilization rate

Active Publication Date: 2019-11-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high gas-liquid ratio, large gas consumption and low utilization rate of tail gas when the existing ozone oxidation technology is dealing with high-salt and high-COD concentrated water, and to provide a low-cost ozone oxidation that can recycle tail gas technology, so that catalytic ozonation technology can be more widely used in industry

Method used

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  • A method and device for treating industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The refinery sewage produced by a petrochemical company in Xinjiang will produce a certain amount of concentrated liquid after being treated by a nanofiltration system. The company's high-salt, high-COD concentrated water also has the characteristics of high salt content, complex organic components, and poor biochemical properties. After testing, the salinity of the water is 1000-2500mg / L, and the COD is 100-250mg / L. First, the nanofiltration concentrated water enters the advanced oxidation reactor 5 through the sewage pump 7, and at the same time, it is passed into the advanced oxidation reactor 5. Ozone with a pressure of 0.1MPa and a concentration of 50mg / L, the pressure inside the advanced oxidation reactor 5 is 0.1MPa, and the advanced oxidation reactor 5 is provided with an obligatory catalyst layer 12 and a catalyst support layer 11 in sequence from top to bottom. Layer 11 is filled with an activated alumina-based heterogeneous catalyst with a particle size of 15 ...

Embodiment 2

[0033] This example is used to illustrate the advanced oxidation method for treating high-salt and high-COD concentrated water with tail gas circulation provided by the present invention.

[0034] Waste water was treated according to the method of Example 1, the difference was that the raw water was cut water from a heavy oil tank farm produced by a petrochemical company. After testing, the salinity of the water is 4500-6000mg / L, and the COD is 2000-3000mg / L. First, the cut water from the heavy oil tank area enters the advanced oxidation reactor 5 through the sewage pump 7, and at the same time passes through the advanced oxidation reactor 5. Ozone with a pressure of 0.3MPa and a concentration of 100mg / L is injected into the advanced oxidation reactor 5, and the internal pressure of the advanced oxidation reactor 5 is 0.2MPa. The advanced oxidation reactor 5 is provided with an obligatory catalyst layer 12 and a catalyst support layer 11 sequentially from top to bottom. The su...

Embodiment 3

[0037] This example is used to illustrate the advanced oxidation method for treating high-salt and high-COD concentrated water with tail gas circulation provided by the present invention.

[0038] Wastewater was treated according to the method of Example 1, except that the raw water was coking wastewater produced by a petrochemical company. After testing, the salinity of the water is 500-1000mg / L, and the COD is 2500-6000mg / L. First, the coking wastewater enters the advanced oxidation reactor 5 through the sewage pump 7, and at the same time, the pressure is fed into the advanced oxidation reactor 5. Ozone at 0.45MPa and a concentration of 150mg / L, the pressure inside the advanced oxidation reactor 5 is 0.2MPa, and the advanced oxidation reactor 5 is provided with an obligatory catalyst layer 12 and a catalyst support layer 11 in sequence from top to bottom, and the catalyst support layer 11 It is filled with active alumina-based heterogeneous catalysts with a particle size of...

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Abstract

The invention relates to a treatment method of industrial wastewater, wherein the method comprises the following specific technological process: high-salt and high-COD concentrated water enters an advanced oxidation reactor through a sewage pump, and the advanced oxidation reactor is internally provided with a special catalyst layer and a catalyst support layer from top to bottom successively, the catalyst support layer is internally filled with activated alumina based multi-phase catalyst with the particle size of 5-15 cm, and the specific catalyst layer is internally filled with a specific catalyst; the high-salt and high-COD concentrated water undergoes a full mixed reaction with ozone provided by a plasma generator in the advanced oxidation reactor, and effluent after the reaction is directly discharged to the outside; tail gas is treated successively through a gas-liquid separation tank, a pre-oxidation tank, an ozone annihilator / ozone destructor and a cold drying and filtration system, and then enters an oxygen storage tank; and the tail gas in the oxygen storage tank is pressurized and then passes through the plasma generator, and is supplied for the whole system to use in a new ozone form finally.

Description

technical field [0001] The invention relates to a treatment method and device for industrial waste water, in particular to an oxidation treatment method for high-salt and high-COD oil refinery waste water. Background technique [0002] At present, with the improvement of my country's environmental protection standards and the requirements of sewage resource utilization, the treatment of concentrated water after membranes in the refining and chemical industry has gradually become the focus and difficulty in the advanced treatment and reuse of sewage. These wastewaters mainly contain xylene, ethylene oxide, phenol, alkanes and other refractory pollutants. In addition, they also contain high dissolved solids and salts, which have an inhibitory effect on the biochemical system. Traditional biochemical and other treatment processes are difficult. make it meet emission standards. Conventional physical and chemical methods have the disadvantages of poor removal effect and high cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78B01D50/00B01D53/76B01D53/86B01D53/66B01D53/26B01D53/44
CPCB01D50/00B01D53/265B01D53/44B01D53/66B01D53/76B01D53/8687B01D2256/12B01D2257/106B01D2258/02C02F1/78C02F2103/365
Inventor 牛春革甄新平聂春梅方新湘陈晓东帕提古丽王传萍
Owner PETROCHINA CO LTD
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