Method for treating sludge by microwave enhanced wet-type catalytic oxidation

A wet catalytic oxidation and sludge technology, which is applied in oxidation treatment of sludge, chemical instruments and methods, sludge treatment, etc., can solve the problems of low thermal efficiency, high operating cost, and large influence of contact area on electric heating heat transfer efficiency, etc. , to achieve the effect of high decomposition efficiency, good economic value, and convenient follow-up processing

Inactive Publication Date: 2018-07-06
SICHUAN COLLEGE OF ARCHITECTURAL TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Steam heating is a commonly used heating method. The thermal efficiency of large boilers can reach more than 80%, but the source of steam is usually boilers (oil-fired boilers, coal-fired boilers and gas-fired boilers), but secondary pollution such as tail gas and slag must be dealt with, and operating costs On the other hand, the mixing degree of steam and liquid is directly related to the heating effect. The smaller the particle size of the steam is, the more dispersed

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  • Method for treating sludge by microwave enhanced wet-type catalytic oxidation

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Embodiment 1

[0028] A method for microwave-enhanced wet catalytic oxidation treatment of sludge, such as figure 1 As shown, the reaction device of the present invention includes a premixer 1, an axial flow pump 2, a microwave reactor 3, and a three-phase separator 4. The premixer 1 is provided with a stirring device, and the premixer 1 passes through an axial The flow pump 2 is connected to the microwave reactor 3, and the axial flow pump 2 introduces the stirred sludge in the premixer 1 into the microwave reactor 3, and the sludge flows in the serpentine tube in the microwave reactor 3 The complete sludge of the reaction is introduced into the three-phase separator 4 for separation to obtain harmless sludge and catalyzer, and the top of the three-phase separator 4 is connected to the bottom of the premixer 1 through the first conduit 5 to guide the reflux steam into the premixer 1; The bottom of the three-phase separator 4 is connected to the pre-mixer 1 through the second conduit 6 to le...

Embodiment 2

[0037] A method for microwave-enhanced wet catalytic oxidation treatment of sludge, such as figure 1 As shown, the reaction device of the present invention includes a premixer 1, an axial flow pump 2, a microwave reactor 3, and a three-phase separator 4. The premixer 1 is provided with a stirring device, and the premixer 1 passes through an axial The flow pump 2 is connected to the microwave reactor 3, and the axial flow pump 2 introduces the stirred sludge in the premixer 1 into the microwave reactor 3, and the sludge flows in the serpentine tube in the microwave reactor 3 The complete sludge of the reaction is introduced into the three-phase separator 4 for separation to obtain harmless sludge and catalyzer, and the top of the three-phase separator 4 is connected to the bottom of the premixer 1 through the first conduit 5 to guide the reflux steam into the premixer 1; The bottom of the three-phase separator 4 is connected to the pre-mixer 1 through the second conduit 6 to le...

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Abstract

The invention discloses a method for treating sludge by microwave enhanced wet-type catalytic oxidation. The method comprises the following steps: uniformly mixing the sludge with an oxidizing agent and a catalyst, then introducing the mixture into a microwave reactor for heating and catalytic degradation, finally separating by using a three-phase separator to obtain green sludge, and recycling the catalyst. The preparation method is simple, and the preparation device is reasonable in arrangement, the sludge is decomposed in a microwave heating mode, the decomposition efficiency is high, the environmental pollution is reduced, and good practicability is achieved.

Description

technical field [0001] The invention belongs to the technical field of wet catalytic oxidation treatment of sludge, in particular to a method for microwave enhanced wet catalytic oxidation treatment of sludge. Background technique [0002] The origin of wet oxidation has been more than 100 years ago, and the research is relatively thorough. It is widely used in the treatment of high-concentration organic wastewater and sludge, but due to high temperature and high pressure, easy corrosion of equipment, high requirements for equipment, and high treatment costs, most of its engineering applications are abroad. The principle of the famous Zimpro, ATHOS, Ver Tech and other processes is catalytic wet oxidation, the typical process conditions are 230-270°C, 4-12MPa, and copper is generally used as the catalyst. In traditional wet oxidation, more than 90% of the operating cost is spent on raising the liquid temperature, and the main heating methods are steam heating and electric he...

Claims

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Application Information

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IPC IPC(8): C02F11/18C02F11/00C02F11/08C02F101/20
CPCC02F11/00C02F11/08C02F11/18C02F2101/20
Inventor 彭丽胡林龙
Owner SICHUAN COLLEGE OF ARCHITECTURAL TECH
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