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A microwave catalytic oxidation equipment for treating landfill leachate

A microwave catalytic oxidation and equipment technology, which is applied in water/sewage multi-stage treatment, illuminated water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problem of difficult effective combination of microwave and catalytic active sites, and the service life of magnetron short, discontinuous microwave heating, etc., to achieve the effect of improving microwave utilization efficiency, prolonging service life, and uniform heating

Inactive Publication Date: 2016-04-20
GUANGDONG UNIV OF TECH +2
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of discontinuous microwave heating, high start-up energy consumption, difficult effective combination of microwave and catalytic active sites, and short service life of magnetron in the existing microwave catalytic oxidation technology, the present invention provides a high microwave utilization efficiency, Microwave catalytic oxidation equipment for treating landfill leachate that has a long service life of a magnetron, good leachate treatment effect, and can be automatically controlled, and a method for using the equipment to treat landfill leachate

Method used

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  • A microwave catalytic oxidation equipment for treating landfill leachate

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Comparison scheme
Effect test

Embodiment 1

[0030] Microwave catalytic oxidation equipment see figure 1 , mainly including mixing water tank, microwave reactor, water cooling device, circulation system, automatic control system. The upper part of the mixing water tank is provided with an overflow valve 2, a water inlet 6, and a dosing tank 7, and a water level gauge 5 and an aeration pipe 4 are arranged in the mixing water tank. The microwave reactor is surrounded by a shell 19, and an outer wire 11, a magnetron 16, a transformer 15, and a coil 18 are arranged inside, and the microwave reactor is connected with a cooling system 17. The circulation system is provided with a forward connecting pipe connecting the mixing water tank and the microwave reactor, on which a circulating water pump 8, a solenoid valve 9, and a flow meter 12 are arranged, and the connecting pipe is connected with the lower end of the coil pipe 18 of the microwave reactor; the circulation system is also provided with There is a return connection p...

Embodiment 2

[0035] Utilize the microwave catalytic oxidation equipment of embodiment 1 to process landfill leachate, method is as follows:

[0036] (1) Fully mix and aerate the landfill leachate to be treated and iron carbon (30 mesh) according to 100:1 (mass ratio), and adjust the pH value to 5.0 to obtain a reaction mixture;

[0037] (2) The reaction mixture enters the coil in the microwave reactor through the water pump;

[0038] (3) Set the temperature of the microwave reactor to 80°C, the running time to 30 minutes, and start the automatic running system;

[0039] (4) Press garbage leachate into the mixed water tank during operation: 30%H 2 o 2 (Volume ratio)=100: Add H in 3 minutes and 5 times 2 o 2 solution;

[0040] (5) Adjust the pH value of the landfill leachate after microwave catalytic oxidation treatment to 9.0, and let it stand for 25 minutes.

[0041] (6) Take the supernatant to measure its COD Cr . COD Cr From 6720mg / L before treatment to 429mg / L after treatment, ...

Embodiment 3

[0043] Utilize the microwave catalytic oxidation equipment of embodiment 1 to process landfill leachate, method is as follows:

[0044] (1) Fully mix and aerate the landfill leachate to be treated and iron carbon (40 mesh) at 200:1 (mass ratio), and adjust the pH value to 4.0 to obtain a reaction mixture;

[0045] (2) The reaction mixture enters the coil in the microwave reactor through the water pump;

[0046] (3) Set the temperature of the microwave reactor to 70°C, the running time to 15 minutes, and start the automatic running system;

[0047] (4) Press garbage leachate into the mixed water tank during operation: 30%H 2 o 2 (Volume ratio)=100: Add H in 4 times in 1 minute 2 o 2 solution;

[0048] (5) Adjust the pH value of the landfill leachate after microwave catalytic oxidation treatment to 8.0, and let it stand for 15 minutes.

[0049] (6) Take the supernatant to measure its COD Cr . COD Cr From 19260mg / L to 958mg / L, the removal rate was 95.1%.

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Abstract

The invention discloses a microwave catalytic oxidation equipment, which mainly includes a mixing water tank, a microwave reactor, a water cooling device, a circulation system, and an automatic control system. Water level gauge and aeration tube; the microwave reactor is surrounded by the outer shell, in which there are outer wires, magnetrons, transformers, and coils connected to the cooling system; the circulation system is provided with a forward connection connecting the mixing water tank and the microwave reactor. The connection pipe and the return connection pipe are connected to the lower end of the coil of the microwave reactor; the return connection pipe is provided with a water outlet and a circulating water pipe, and the circulating water pipe is connected to the mixing water tank; the microwave reactor and the water cooling device are connected to the automatic control system . The invention is used for treating landfill leachate, and has high microwave utilization efficiency, long service life of magnetron, good leachate treatment effect and automatic control.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to the field of sewage treatment, and more specifically, to a microwave catalytic oxidation equipment and treatment method for landfill leachate. Background technique [0002] Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the covering soil, and passing through the garbage layer and the covering soil. a waste water. The components of landfill leachate are complex, the water quality and quantity vary greatly, the content of ammonia nitrogen is high, and the content of organic pollutants is high. It not only contains a large amount of organic pollutants that are difficult to biodegrade, but also contains various heavy metals. It is a kind of high-concentration organic wastewater with complex components. ,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F1/30C02F1/72
Inventor 林亲铁韩少杰潘永刚
Owner GUANGDONG UNIV OF TECH
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