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Organic solid waste smoldering ignition optimization method and smoldering furnace

An organic solid waste and optimization method technology, applied in the direction of combustion method, incinerator, combustion type, etc., can solve the problem of increasing the energy consumption cost of the smoldering disposal process, increasing the complexity and operation difficulty of the smoldering process, and reducing the overall economy of the process and other problems, to achieve the effect of facilitating industrial application, reducing ignition time and cost, and simple structure

Pending Publication Date: 2021-05-07
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sources of organic solid waste with high water content and low calorific value are rich and complex, and its quality characteristics are changeable, which brings great uncertainty to the time of the early heating process and the influence of the scheduled ignition process temperature and the material characteristics of the material layer, adding to the smoldering process. The complexity and difficulty of operation affect the application and promotion; due to the low flammability characteristics of organic solid waste with high water content and low calorific value, the process time (2-4h) for heating the material to the ignition temperature in the early stage is often long, which virtually increases the smoldering The energy consumption cost of the disposal process reduces the overall economics of the process

Method used

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  • Organic solid waste smoldering ignition optimization method and smoldering furnace

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The organic solid waste to be treated in this application is municipal sludge with a moisture content of 78% and an ash content of 23% on a dry basis. The auxiliary ignition fuel is sawdust with a moisture content of 12%, an ash content of 6% on a dry basis, and a calorific value of 18MJ / kg. The porous media material is sand.

[0036] The ratio of the auxiliary ignition fuel to the porous medium material in the auxiliary ignition material layer is 1:3.5.

[0037] The diameter of the smoldering furnace is 1.15m, the material of the second porous medium layer is sand, and the thickness is 1cm.

[0038] An auxiliary ignition material layer with a thickness of 4 cm is laid on the second porous medium layer. And the mixture of sludge and sand is filled above the auxiliary ignition material layer, and the filling thickness is greater than 30cm.

[0039] The power of the heating layer is 18kW, and it is controlled to start heating at 400°C. After heating for about 30 minute...

Embodiment 2

[0041] The organic solid waste to be treated in this application is municipal sludge with a moisture content of 78% and an ash content of 23% on a dry basis. The auxiliary ignition fuel is sawdust with a moisture content of 8%, dry basis ash content of 9%, and a calorific value of 20MJ / kg. The porous media material is sand.

[0042] The ratio of the auxiliary ignition fuel to the porous medium material in the auxiliary ignition material layer is 1:3.

[0043] The diameter of the smoldering furnace is 1.15m, the material of the second porous medium layer is sand, and the thickness is 1cm.

[0044] An auxiliary ignition material layer with a thickness of 3 cm is laid on the second porous medium layer. And the mixture of sludge and sand is filled above the auxiliary ignition material layer, and the filling thickness is greater than 30cm.

[0045] The power of the heating layer is 18KW, and it is controlled to start heating at 400°C. After heating for about 30 minutes, it passe...

Embodiment 3

[0047] The organic solid waste to be treated in this application is municipal sludge with a moisture content of 78% and an ash content of 23% on a dry basis. The auxiliary ignition fuel is shredded paper with a moisture content of 3%, dry basis ash content of 13%, and calorific value of 15MJ / kg. The porous media material is sand.

[0048] The ratio of the auxiliary ignition fuel and the porous medium material in the auxiliary ignition material layer is 1:1.

[0049] The diameter of the smoldering furnace is 1.15m, the material of the second porous medium layer is sand, and the thickness is 1cm.

[0050] An auxiliary ignition material layer with a thickness of 3 cm is laid on the second porous medium layer. And the mixture of sludge and sand is filled above the auxiliary ignition material layer, and the filling thickness is greater than 30cm.

[0051] The power of the heating layer is 18KW, and it is controlled to start heating at 400°C. After heating for about 30 minutes, it ...

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Abstract

The invention belongs to the related technical field of solid waste treatment and discloses an organic solid waste smoldering ignition optimization method and a smoldering furnace. The method comprises the following steps of before the organic solid waste is added into the smoldering furnace, laying an auxiliary ignition material layer at the bottom of the smoldering furnace, and then carrying out ignition and smoldering, wherein the auxiliary ignition material layer is a mixture of auxiliary ignition fuel and a porous medium material, the ignition point of the auxiliary ignition fuel is smaller than 400 DEG C, the water content is smaller than 15%, the ash content is smaller than 10%, and the heat value is larger than 15 MJ / kg. Before the organic solid waste to be treated is loaded into the smoldering furnace, the auxiliary ignition material layer is firstly laid at the bottom of the smoldering furnace, the auxiliary ignition material layer comprises the auxiliary ignition fuel which is low in ignition point, small in water content, small in ash content and large in heat value, ignition is better facilitated, the smoldering ignition time is remarkably shortened, and the economy of organic solid waste smoldering is improved.

Description

technical field [0001] The invention belongs to the technical field related to solid waste treatment, and more specifically relates to a smoldering ignition optimization method of organic solid waste and a smoldering furnace. Background technique [0002] The smoldering disposal technology process is used to dispose of organic solid waste with high water content (more than 60%) and low calorific value (less than 1.6MJ / kg). It has the characteristics of direct incineration and disposal without continuous supply of fuel or heat from the outside. The process includes ignition There are three links: ignition, self-sustaining combustion, and product treatment. [0003] In the ignition and ignition process of the traditional smoldering disposal process, the bottom heating device directly heats the material to the ignition temperature and then supplies air to achieve ignition. However, the sources of organic solid waste with high water content and low calorific value are rich and ...

Claims

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Application Information

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IPC IPC(8): F23G5/08F23G5/44
CPCF23G5/08F23G5/44F23G2204/101
Inventor 冯超乔瑜高翔鹏徐明厚黄经春
Owner HUAZHONG UNIV OF SCI & TECH