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Equipment and method of plasma arc and electric heat combination for cracking organic waste

A combination of plasma and electrothermal technology, which is applied to solid waste removal, combustion methods, lighting and heating equipment, etc., can solve the problems of increasing the burden on the exhaust gas treatment system, uniformly distributing heat in large areas, and small high-temperature areas. Achieve simple and reliable equipment, improve overall efficiency, and control exhaust emissions

Inactive Publication Date: 2009-03-18
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is: in order to overcome the slow heating of the electric furnace that only utilizes Joule's electrothermal effect, low volatilization temperature elements and metal gasification will be enriched in the exhaust gas, pollute the tail gas, and cause an increase in the burden on the tail gas treatment system Disadvantages; and for the high temperature of the plasma arc, but it is difficult to evenly distribute the heat in a larger reactor space, and the disadvantages of the small high-temperature area; thereby providing a heating element, using the Joule electrothermal effect to heat the reactor crucible, expanding the high temperature Area, device and method for complex pyrolysis of organic waste combined with plasma arc technology

Method used

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  • Equipment and method of plasma arc and electric heat combination for cracking organic waste
  • Equipment and method of plasma arc and electric heat combination for cracking organic waste
  • Equipment and method of plasma arc and electric heat combination for cracking organic waste

Examples

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Effect test

Embodiment 1

[0051] See attached figure 1 , making a plasma arc furnace, such as figure 1 structure shown. The upper furnace body 1 and the lower furnace body 3 are steel shells, and their inner sides are provided with refractory materials and heat insulating material linings 2, and the bottom of the lower furnace body 3 is provided with a crucible 4, and a partition is added between the crucible 4 and the inner wall of the furnace. heat screen.

[0052] refer to figure 2 b is a wrapped structure, the innermost layer is a crucible 23 made of conductive refractory material, the crucible 23 is wrapped with a layer of insulating refractory material 24, and the insulating refractory material 24 is wrapped with a heating element 22.

[0053] in the attached figure 1 In a plasma arc furnace, use figure 2 The structure shown in b has a crucible wrapped by a heating element, combined with the cracking treatment of organic waste, the present invention is described in detail, and its technolo...

Embodiment 2

[0061] combined with figure 1 , 2 and 3, on the basis of embodiment 1, the device and method are further described.

[0062] The difference lies in the plasma arc part: 2 water-cooled copper electrodes, connected to a DC plasma power supply, the plasma power is 50kW, the electric heating is 100kW, and the processing capacity is 120-180 kg / hour. When the temperature of the crucible wall is controlled within the range of 1473-1573K , power consumption is 0.9-1.2kW-h / kg.

[0063] The structure in which the electric heating element is embedded in the crucible is adopted. The crucible is made of magnesium oxide material, and the combination with the electric heating element refers to figure 2 a. The structure is an embedded structure. The silicon carbon heating element 22 is wrapped on the inner layer of the crucible 21 made of non-conductive refractory material, and then an outer layer of the crucible made of non-conductive refractory material of matching size is placed outsi...

Embodiment 3

[0069] The processing object and the embedded structure of the heating element in this embodiment are the same as those in Embodiment 2, but the method for realizing the embedded structure is different.

[0070] The crucible 4 of this embodiment has an integral structure, and the material is alumina. The high-temperature electric heating wire is penetrated by punching holes on the top to form an embedded structure of heating elements. The temperature of the crucible wall is in the range of 1373-1473K. Silicon-molybdenum electric heating rods can also be used to embed the magnesia crucible blank in advance, process it into a suitable shape, and then sinter it to form a heating element embedded structure. The combination of silicon molybdenum electric heating rod and magnesium oxide can get a higher working temperature.

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Abstract

An apparatus for cracking the organic waste by plasma arc and electric heat is composed of a plasma arc furnace with refractory layer, thermal insulating liner, cooling water jacket, feeding inlet, gas exhaust outlet, slag outlet and working gas inlet, power supply, at least two electrods connected with said power supply, crucible with electric heating element, and thermocouple for measuring and controlling temp. Its advantages are low cracking temp (1273-1773 deg.K) and high electrothermal efficiency (100%).

Description

technical field [0001] The invention relates to a device for cracking organic waste by plasma, in particular to a device and method for cracking organic waste by combining plasma arc and electric heating. Background technique [0002] Organic waste is not only extremely harmful in itself, but may also contain various other toxic and harmful components. For example, the bacteria and viruses carried by medical waste are highly infectious, and chemical waste contains toxic and harmful organic substances such as polycyclic aromatic hydrocarbons and polychlorinated biphenyls, so they must be effectively treated and disposed of. At present, the treatment of medical waste and other organic waste has become an important environmental protection issue, and all sectors of society pay great attention to harmless treatment methods. The incineration method can completely eliminate pathogens, but it is easy to release harmful gases and produce secondary pollution. For example, polychlori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00F23G7/00
Inventor 盛宏至魏小林吴承康
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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