A self-sustaining smoldering disposal method for organic solid waste based on in-furnace catalytic oxidation

Abstract

The invention belongs to the field of solid waste disposal, and specifically discloses a self-sustaining smoldering disposal method for organic solid waste based on catalytic oxidation in a furnace, which includes the following steps: using the mixture of organic solid waste, porous media materials and catalysts as a smoldering The packed bed material in the furnace is then heated, and air is introduced into the smoldering furnace, so that the organic solid waste mixed in the porous medium material undergoes a smoldering reaction, and the unburned flue gas produced by the smoldering reaction passes through the smoldering When the pyrolysis reaction layer above the combustion reaction surface, it will continue to undergo oxidation reaction with the remaining oxygen under the action of the catalyst, thereby reducing the exhaust gas content of the smoldering reaction and completing the smoldering disposal of organic solid waste. The invention organically combines the catalytic oxidation technology with the smoldering combustion technology, improves the smoldering disposal reaction process and improves the further oxidation of combustible gas components in the self-reaction process, reduces flue gas pollution emissions, and optimizes the smoldering organic solid waste disposal process.

Description

technical field [0001] The invention belongs to the field of solid waste disposal, and more specifically relates to a method for self-sustaining smoldering disposal of organic solid waste based on catalytic oxidation in a furnace. Background technique [0002] Organic solid waste includes organic solid waste with high water content and low calorific value, such as kitchen waste, oilfield sludge, municipal sludge, river sludge, oily soil, biogas residue, etc. At present, traditional organic solid waste such as domestic waste is mainly disposed of by incinerators. However, organic solid waste with high water content and low calorific value does not meet the conditions for direct incineration in traditional incinerators due to its own characteristics. The incineration process is often difficult to burn, or it is necessary to increase the combustion temperature by adding fuel with high calorific value, which increases process costs. [0003] Smoldering disposal is a new type of...

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Problems solved by technology

[0004] However, the current smoldering technology has the characteristics of combustion in the lower part of the process, pyrolysis in the upper part, and continuous transfer from bottom to top, resulting in high levels of combustible gas components such as carbon monoxide in the exhaust gas, which need to be purified and discharged into the atmosphere

At the same time, the current catalytic oxidation flue gas treatment technology mainly uses the temperature rise or the residual temperature of the flue gas to catalyze and oxidize the combustible flue gas components in the waste after the flue gas is discharged from the furnace body, and then achieve the purpose of purification. However, due to the smoldering disposal technology The flue gas temperature is low (<80°C) and the humidity is high (about 80% to 90%), which increases the technical difficulty of the existing technology for flue gas purification in the smoldering disposal process, and improves the overall complexity and realization of the process system. cost

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