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A new type of waste incineration fly ash pyrolysis system and method

A technology for waste incineration fly ash and pyrolysis, which is applied in the fields of electric power and environmental protection, can solve the problems of high energy consumption, dioxin regeneration, and high equipment requirements, and achieves the goal of reducing energy consumption, reducing equipment investment, and eliminating the problem of regeneration. Effect

Active Publication Date: 2022-08-02
北科蕴宏环保科技(北京)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have the following disadvantages: high-temperature heat treatment not only requires higher requirements for the entire system equipment, but also consumes relatively high energy consumption during the heat treatment process, and there is also the problem of dioxin regeneration under aerobic conditions

Method used

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  • A new type of waste incineration fly ash pyrolysis system and method
  • A new type of waste incineration fly ash pyrolysis system and method
  • A new type of waste incineration fly ash pyrolysis system and method

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Effect test

Embodiment 1

[0035] Using the waste incineration fly ash pyrolysis technology of the present application to treat fly ash from a waste power plant in Shanxi Province includes the following steps:

[0036] 1) Pre-storage of fly ash: The fly ash is sent into the temporary feed storage bin 1 by nitrogen transport, and the feed bin 9 is located at the upper end of the feed port of the pyrolysis furnace 2, ready for feeding;

[0037] 2) Gas replacement: After two nitrogen purging and replacement of the waste incineration fly ash pyrolysis system, a pressure-holding test was carried out on the pyrolysis furnace 2, and the pressure did not decrease significantly for 12 hours;

[0038] 3) Fly ash pyrolysis: after preheating the pyrolysis furnace 2 to 900°C, the fly ash in the feed temporary storage bin 1 is gradually sent into the pyrolysis furnace 2 for heating treatment. Heating, by adjusting the temperature of pyrolysis furnace 2 to control the temperature of fly ash in the furnace between 600℃...

Embodiment 2

[0046] Using the waste incineration fly ash pyrolysis technology of the present application to treat fly ash from a waste power plant in Hebei Province includes the following steps:

[0047] 1) Pre-storage of fly ash: The fly ash is sent into the temporary feed storage bin 1 by nitrogen transport, and the feed bin 9 is located at the upper end of the feed port of the pyrolysis furnace 2, ready for feeding;

[0048] 2) Gas replacement: After the waste incineration fly ash pyrolysis system is purged and replaced with nitrogen twice, the pressure holding test of the pyrolysis furnace 2 is carried out, and the pressure does not decrease significantly for 12 hours;

[0049] 3) Fly ash pyrolysis: after preheating the pyrolysis furnace 2 to 900°C, the fly ash in the feed temporary storage bin 1 is gradually sent into the pyrolysis furnace 2 for heating treatment. Heating, by adjusting the temperature of the pyrolysis furnace 2 to control the temperature of the fly ash in the furnace ...

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Abstract

The invention discloses a novel waste incineration fly ash pyrolysis system and method, and the invention relates to the fields of electric power and environmental protection. The novel waste incineration fly ash pyrolysis system of the invention includes a temporary feed storage bin, a pyrolysis furnace, a gas purification and circulation system, and a storage bin, and the fly ash is continuously supplied to the pyrolysis furnace through the temporary feed storage bin. Fully heating in an oxygen-free environment in the furnace realizes the degradation of dioxins, and effectively prevents the regeneration of dioxins, and achieves the purpose of completely removing organic harmful substances. The gas generated in the pyrolysis process is collected by the gas purification system, and it is effectively enriched and purified, so that the fly ash pyrolysis is more efficient, and the organic harmful substances in the solid residue after pyrolysis are reduced to a lower level. It can pollute the atmospheric environment, meet the needs of the oxygen-free environment of the pyrolysis furnace, reduce the concentration of organic harmful substances in the gas phase of the pyrolysis furnace, and improve the reaction efficiency.

Description

technical field [0001] The invention relates to the technical fields of electric power and environmental protection, in particular to a new type of waste incineration fly ash pyrolysis system and method. Background technique [0002] In recent years, with the rapid development of my country's economy, the continuous acceleration of urbanization, and the rapid population growth, the output of waste has increased year by year. According to statistics, in 2017, my country's urban domestic waste removal volume reached 215.2 million tons. There are three main methods of harmless waste disposal in my country: sanitary landfill, incineration for power generation and composting. Sanitary landfill needs to occupy a lot of land resources. With the rise of land prices and the continuous improvement of urban environmental requirements, domestic waste incineration power generation is becoming more and more popular because of its advantages of capacity reduction and energy recovery, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/40B09B5/00B01D46/02B01D53/04B09B101/30
CPCB09B5/00B01D53/04B01D46/023Y02A50/2351
Inventor 张宁黄晓燕张静文
Owner 北科蕴宏环保科技(北京)有限公司
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