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Dioxin inhibitor in low temperature pyrolyzing furnace for domestic garbage as well as preparation method and application of dioxin inhibitor

A low-temperature pyrolysis and domestic waste technology, which is applied in the fields of fuel additives, petroleum industry, fuel, etc., can solve the problem of difficult to reach the standard of dioxin emission, and achieve the effect of inhibiting the formation of dioxin, facilitating industrial production, and reducing difficulty.

Active Publication Date: 2016-11-16
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-temperature-resistant, high-efficiency inhibitor that can inhibit the formation and adsorption of dioxin and its preparation method for the formation process of dioxin in the existing low-temperature pyrolysis furnace for domestic waste, so as to solve the problem of garbage Problems Difficult to Reach Standards for Dioxin Emissions in Low Temperature Pyrolysis Process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use heavy carbonic acid and kaolin with a mass ratio of 1:3.0 to mix evenly, soak in 50°C, 4mol / L sodium hydroxide solution for 2.5 hours, and calcine at 700°C for 3 hours to obtain a mixed powder. The mixture was uniformly mixed with sepiolite at a mass ratio of 1:1, cooled naturally, ground, and passed through a 50-mesh sieve to obtain the dioxin inhibitor in the domestic waste low-temperature pyrolysis furnace of this example.

[0032] The kaolin used has a particle size of 30 mesh and a specific surface area of ​​45m 2 / g, total pore volume 0.05m 2 / g, containing 39% SiO 2,38%Al 2 o 3 , other ingredients accounted for 23%, loss on ignition rate 19%.

[0033] The calcium carbonate used is heavy calcium carbonate with a particle size of 20 mesh and a purity greater than 93%.

[0034] The sepiolite used is raw sepiolite, with a particle size of 30 mesh and a specific surface area of ​​250m 2 / g, containing 55% SiO 2 , 27% MgO.

[0035] The method of using dioxi...

Embodiment 2

[0037] Use heavy carbonic acid ratio kaolin with a mass ratio of 1:2.5, mix evenly, soak in 6mol / L sodium hydroxide solution at 50°C for 3 hours, and calcinate at 800°C for 3 hours to obtain a mixed powder. The mixed powder and sepiolite were uniformly mixed at a mass ratio of 1:1, cooled naturally, ground, and passed through a 50-mesh sieve to obtain the dioxin inhibitor in the domestic waste low-temperature pyrolysis furnace of this example.

[0038] The kaolin used has a particle size of 50 mesh and a specific surface area of ​​60m 2 / g, total pore volume 0.08m 2 / g, containing 40% SiO 2 ,35%Al 2 o 3 , other ingredients accounted for 25%, loss on ignition rate 20%.

[0039] The calcium carbonate used is heavy calcium carbonate with a particle size of 20 mesh and a purity greater than 93%.

[0040] The sepiolite used is raw sepiolite, with a particle size of 30 mesh and a specific surface area of ​​400m 2 / g, containing 60% SiO 2 , 25% MgO.

[0041] The method of usi...

Embodiment 3

[0043] Use heavy carbonic acid ratio kaolin with a mass ratio of 1:2.5, mix evenly, soak in 6mol / L sodium hydroxide solution at 70°C for 2.5 hours, and calcinate at 800°C for 2.5 hours to obtain a mixed powder. The mixture was uniformly mixed with sepiolite at a mass ratio of 1:0.5, cooled naturally, ground, and passed through a 50-mesh sieve to obtain the dioxin inhibitor in the domestic waste low-temperature pyrolysis furnace of this example.

[0044] The kaolin used has a particle size of 50 mesh and a specific surface area of ​​60m 2 / g, total pore volume 0.08m 2 / g, containing 40% SiO 2 ,35%Al 2 o 3 , other ingredients accounted for 25%, loss on ignition rate 20%.

[0045] The calcium carbonate used is heavy calcium carbonate with a particle size of 20 mesh and a purity greater than 93%.

[0046] The sepiolite used is raw sepiolite, with a particle size of 30 mesh and a specific surface area of ​​400m 2 / g, containing 60% SiO 2 , 25% MgO.

[0047] The method of us...

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Abstract

The invention discloses a dioxin inhibitor in a low temperature pyrolyzing furnace for domestic garbage as well as a preparation method and application of the dioxin inhibitor. The dioxin inhibitor in the pyrolyzing furnace is mainly prepared from the following raw materials of CaCO3, kaolin and sepiolite. The preparation method comprises the following steps of mixing the kaolin with the calcium carbonate in the proportion of the kaolin to the calcium carbonate being (1 to 2) to (1 to 3 ), then performing treatment, and then mixing a treated mixture with the sepiolite in the proportion of the treated mixture to the sepiolite being (1 to 0.5) to (1 to 1.0 ). The inhibitor is uniformly mixed with pre-treated domestic garbage in the low temperature pyrolyzing furnace, or covers the garbage, so that thermolysis treatment is performed on the surface of the garbage, the discharge concentration of dioxin in flue gas for the low temperature pyrolyzing furnace can be reduced by 85.4-92.8%. The inhibitor has the functions of restraining the formation of the dioxin in the low temperature pyrolyzing furnace and adsorbing the dioxin, and besides, also has the advantages of being resistant to high temperature, environmentally-friendly, low in cost, free from secondary pollution and the like. The dioxin inhibitor disclosed by the invention is convenient to prepare and use, industrialized production is easy to realize, and the dioxin inhibitor is suitable for being used in the low temperature pyrolyzing furnace.

Description

technical field [0001] The invention relates to an inhibitor, in particular to the preparation of a dioxin inhibitor in a domestic waste low-temperature pyrolysis furnace, and its use method, which is suitable for domestic low-temperature pyrolysis furnaces to reduce dioxin at the flue gas outlet of the low-temperature pyrolysis furnace British emission concentration. Background technique [0002] In recent years, the treatment of rural domestic waste has become an urgent problem to be solved. Among them, the updraft low-temperature pyrolysis technology is especially suitable for the treatment of scattered and small amounts of rural domestic waste due to its good reduction effect, low investment, and convenient operation and maintenance. At present, it has been widely promoted and used in some rural areas of our country. The pyrolysis furnace treats domestic waste through slow smoldering-pyrolysis under low oxygen conditions, does not need to provide auxiliary fuel, does no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00
CPCC10L10/00C10L2230/08
Inventor 程江雷鸣海景卢佳伟程涛
Owner SOUTH CHINA UNIV OF TECH
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