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Waste bath smelting method
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A technology for molten pool smelting and waste, which is applied in the removal of solid waste, chemical instruments and methods, and improvement of process efficiency, can solve problems such as the scale of secondary pollution treatment, and achieve improved pyrolysis combustion effect, low energy consumption, and improved cleaning effect
Active Publication Date: 2020-03-03
CHINA ENFI ENGINEERING CORPORATION
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[0004] The main purpose of the present invention is to provide a melting pool smelting method for waste, so as to completely solve the problem of secondary pollution and small processing scale in the process of hazardous waste treatment
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Embodiment 1
[0059] raw material:
[0060] Solid organic hazardous waste (HW12, dye and paint waste), calorific value 3400Kcal / kg, waste mineral oil (HW08, calorific value 9000kcal / kg), rotary kiln incineration slag (HW18).
[0061] Slagging agent: limestone, steel slag.
[0062] Solid organic hazardous waste, rotary kiln slag, slagging agent and waste mineral oil are sprayed into the figure 1 Treatment is carried out in the waste treatment system shown, the slag is removed and water quenched. The melting parameters are shown in Table 1.
[0063] The industrial composition of organic hazardous waste is shown in Table 2.
[0064] The waste treatment unit is a side-blowing smelting furnace, and its material balance is shown in Table 3.
[0065] Discharge the main pollutants in the flue gas, Table 4.
[0066] See Table 5 for the results of the leaching toxicity analysis of the discharged slag.
[0067] The melting point of the slag is 1220°C, the viscosity value at 1300°C is 0.23Pa·s, a...
Embodiment 2
[0069] The difference from Example 1 is that the melting temperature is 1100°C. As a result, the molten slag was not completely melted, and the viscosity value was 3.3 Pa·s at the smelting temperature, which was difficult to discharge slag compared with Example 1.
Embodiment 3
[0071] The difference from Example 1 is that the weight content of CaO in the slag is increased to 35%, and the weight content of FeO is correspondingly reduced to 18%. As a result, the melting point of the slag rises above 1300° C., the slag is not completely melted at the melting temperature, and the viscosity value at the melting temperature is 2.8 Pa·s, which is difficult to discharge slag compared with Example 1.
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Abstract
The invention provides a melting pool smelting method of waste. The molten pool smelting method includes: separating waste from solid and liquid to obtain solid waste and liquid waste; melting the solid waste in a melting pool smelting device to obtain metal phase and slag; The melted liquid waste undergoes pyrolysis and combustion reaction in the melting pool smelting device to obtain pyrolysis gas, and the atomized liquid waste can replace at least part of the smelting fuel. In the above smelting method, the solid and liquid wastes are treated separately and combined with the liquid atomization treatment, which can also make the wastes more fully smelted and burned. At the same time, the above-mentioned method has a short process flow and has the advantages of low energy consumption and low cost. In addition, after the waste is treated by the above method, the obtained product not only does not cause secondary pollution, but also can be used for other purposes, thereby improving its economic benefits.
Description
technical field [0001] The invention relates to the field of hazardous waste treatment, in particular to a method for smelting waste in a melting pool. Background technique [0002] Currently waste is mainly disposed of through landfill or incineration processes. Landfill does not perform one-time harmless treatment of waste, but just dumps the above waste in the landfill, which has permanent safety hazards, especially for hazardous waste. Hazardous waste refers to waste that is toxic, flammable, explosive, corrosive, chemically reactive and / or infectious, and will pose serious hazards to the ecological environment and human health. Once the geomembrane laid during the landfill is broken, the above-mentioned hazardous waste will cause long-term pollution of soil and groundwater and is difficult to repair. At the same time, the landfill method also has problems such as large land occupation and subsequent pollution. Although incineration disposal can effectively reduce the ...
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