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Solid waste and hazardous waste cleaning and recycling treatment method

A disposal method and recycling technology, applied in the field of waste recycling, can solve problems such as high cost, difficulty in cleaning, secondary pollution, etc., achieve the effect of reducing disposal energy consumption and operating costs, and improving resource utilization efficiency

Inactive Publication Date: 2020-06-05
邰学林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waste to be processed includes solid waste, liquid waste and hazardous waste, and the gas-solid toxic and hazardous waste generated in the existing solid waste incineration process is co-processed and resource-utilized, so as to solve the existing solid waste Disposal costs are high, secondary pollution is serious, and it is difficult to achieve clean and resource-based disposal problems

Method used

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  • Solid waste and hazardous waste cleaning and recycling treatment method
  • Solid waste and hazardous waste cleaning and recycling treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0078] see figure 1 As shown, the clean resource disposal method of solid waste and hazardous waste of the present invention comprises the following steps:

[0079] (1) The waste 8 is sent into the pyrolysis furnace 1, and during the heating process, the pyrolysis gas 18 generated by thermochemical reactions such as distillation and cracking of the organic matter in the waste 8 leaves from the gas phase outlet at the top of the pyrolysis furnace 1, The ash, heavy metals, coke produced by pyrolysis and solid residues that have not been pyrolyzed become pyrolysis residues 19 and are discharged from the slag outlet at the bottom of the pyrolysis furnace 1 .

[0080] (2) The pyrolysis gas 18 and pyrolysis residue 19 discharged from the pyrolysis furnace and the selectively added high-calorific value substances 17 enter the gas-solid pressurized conveying device 2 for pressurized and mixed treatment to obtain a multi-phase material 21, a multi-phase material 21 Enter the high-temper...

Embodiment 1-1

[0087] see figure 2 with Figure 13 As shown, the clean resource disposal method of solid waste and hazardous waste of the present invention comprises the following steps:

[0088] (1) After the municipal solid waste 8-1 is drained, it is crushed by a double-roller crusher and then sent to the rotary pyrolysis furnace 1-1 by a belt. ℃ (the heat source partly comes from the heat carried by the gas medium nitrogen of the gas-gas heat exchanger 4-1, and partly comes from the combustion of clean coal gas); in the rotary pyrolysis furnace 1-1, the domestic garbage 8-1 is dried, carbonized, Thermochemical reactions such as pyrolysis; about 350Nm is discharged from the exhaust port of the rotary pyrolysis furnace 1-1 3 / (t garbage), calorific value is 4000Kcal / Nm 3 The left and right pyrolysis gas 18 entrained with tar is discharged from the lower slag outlet of the rotary pyrolysis furnace 1-1 and is composed of ash content, heavy metals, coke and other substances produced by cr...

Embodiment approach 2

[0101] see image 3 As shown, waste 8 is sent to low-temperature gasification furnace 1-2 by solid pressurized conveying device 2-1 after being processed, and in low-temperature gasification furnace 1-2, add by water vapor and oxygen-containing oxidizing agent (air, The gasification agent 10 composed of oxygen-enriched air or oxygen) is subjected to low-temperature gasification reaction to produce crude gas 18-1, and the crude gas 18-1 is discharged from the gas phase outlet of the low-temperature gasification furnace 1-2, and the organic solid waste and hazardous waste The ash, heavy metals and organic solid wastes that have not been gasified become gasification slag 19-1 and are discharged from the slag outlet of low-temperature gasification furnace 1-2. Gasification slag 19-1 and selectively added high-calorific value substances 17 The solid pressurized conveying device 2 is mixed with the raw coal gas 18-1 from the low-temperature gasification furnace 1-2 and sent to the h...

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Abstract

The invention relates to a solid waste and hazardous waste cleaning and recycling treatment method. The method comprises the following steps: S1, pre-treating wastes and feeding the wastes and a gasifying agent into a high-temperature thermal reaction device for high-temperature gasification reaction to obtain high-temperature coal gas and molten slag, wherein the highest reaction temperature in the high-temperature thermal reaction device is higher than the ash melting point flowing temperature of the waste and the high-temperature gasification reaction is completed in a reducing atmosphere,and the reducing atmosphere refers to that the molar concentration of oxygen in gas in a reaction system is lower than 0.5% and the molar concentration of the sum of carbon monoxide and hydrogen in the gas is higher than 5%; and S2, carrying out heat exchange and purification on the high-temperature coal gas to obtain clean coal gas, and cooling and recycling the molten slag.

Description

technical field [0001] The invention relates to the technical field of waste resource treatment, in particular to a clean resource treatment method for solid waste and hazardous waste. Background technique [0002] In the field of environmental technology, the existing medical waste, domestic waste, industrial waste and other organic solid waste and hazardous waste are often disposed of by incineration, pyrolysis incineration, pyrolysis gasification incineration and other methods, which can greatly reduce the volume, and through the recovery and incineration process The heat energy generated in the process realizes the partial resource utilization of low-value organic solid waste. However, the incineration or pyrolysis of organic solid waste will produce gas-solid two-phase toxic and hazardous waste at the same time. The existing technology can only treat the gas phase or solid phase. The harmless disposal of toxic and hazardous waste alone is costly, incomplete disposal and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/48C10J3/50C10J3/72C10J3/84B01J6/00F23G7/00
CPCB01J6/008C10J3/485C10J3/506C10J3/721C10J3/723C10J3/84C10J2300/0946C10J2300/0956C10J2300/1615C10J2300/1634F23G7/00
Inventor 邰学林
Owner 邰学林
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