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Novel fly ash efficient resource utilization system and method

A recycling and fly ash technology, which is applied in the field of new fly ash efficient resource utilization system, can solve the problems of inability to achieve detoxification, continuous production, dioxin regeneration, high equipment requirements, etc., to improve the processing capacity of a single furnace, Increase the uniformity of heating and the effect of uniform heating

Active Publication Date: 2022-04-15
北科蕴宏环保科技(北京)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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
All kinds of pyrolysis methods generally have their specific purposes, and cannot achieve detoxification and continuous production. Therefore, it is necessary to invent a continuous, efficient, and high-value-added pyrolysis system.

Method used

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  • Novel fly ash efficient resource utilization system and method
  • Novel fly ash efficient resource utilization system and method
  • Novel fly ash efficient resource utilization system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0072] use figure 1 The high-efficiency continuous fly ash heat treatment system treats waste incineration fly ash. The specific process is as follows:

[0073] Put the waste incineration fly ash into the fly ash bin 301, turn on the heating system in the preheater 2 to preheat the heat storage ball, send the preheated heat storage ball into the heat carrier storage bin 302, and turn on the return The external heating chamber of the mixed pyrolysis reactor preheats the back-mixed pyrolysis reactor. The heat storage ball and the waste incineration fly ash are mixed according to the volume ratio of 1.5-2:1. The heat storage ball adopts a spherical ceramic ball with a size of φ20-40mm. Rotate the back-mixing pyrolysis reactor, and control the temperature of the pyrolysis reactor at 700±15°C by adjusting the amount of gas (combustible gas supplied from outside) and the amount of air. After the temperature of the heat storage ball rises to 600±10°C, the waste incineration fly as...

Embodiment 2

[0093] use figure 1 The high-efficiency continuous fly ash heat treatment system treats waste incineration fly ash. The specific process is as follows:

[0094] Put the waste incineration fly ash into the fly ash bin 301, turn on the heating system in the preheater 2 to preheat the heat storage ball, send the preheated heat storage ball into the heat carrier storage bin 302, and turn on the return The external heating chamber of the mixed pyrolysis reactor preheats the back-mixed pyrolysis reactor. Heat storage balls and waste incineration fly ash are mixed according to the volume ratio of 2:1. Rotate the back-mixing pyrolysis reactor, and control the temperature of the pyrolysis reactor at 800±10°C by adjusting the amount of gas and air. After the temperature of the heat storage ball rises to 500±10°C, the waste incineration fly ash and the heat storage ball are transferred to the mixing bin 4, and after mixing evenly under the action of the stirring device, they are fed in...

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Abstract

The invention relates to the technical field of environmental protection, in particular to a novel fly ash efficient resource utilization system and method.The method comprises the steps that fly ash is subjected to heat treatment, and a fly ash product obtained after heat treatment is mixed with slag and desulfurized gypsum to prepare a solid waste-based cementing material. The novel fly ash efficient resource utilization system comprises a back-mixing pyrolysis reactor, a preheater, a feeding bin, a mixing bin, a gas purification system, a finished product bin, a solid waste-based cementing material mixing device, a solid waste-based cementing material preparation device and a solid waste-based cementing material finished product bin. The invention provides a novel fly ash efficient resource utilization system which can greatly improve the cracking efficiency of organic compounds, reduce equipment faults, reduce the occupied area of equipment, thoroughly solve the problem of non-uniform local pyrolysis caused by non-uniform heating of materials, greatly reduce energy consumption and prolong the service life of the equipment.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a novel fly ash efficient resource utilization system and method. Background technique [0002] Slag is one of the most discharged solid wastes in the iron and steel metallurgy industry. For every ton of pig iron smelted, the amount of blast furnace slag produced is between 300-350kg. Under the influence of natural conditions, some harmful components in blast furnace slag will be transferred to the atmosphere, water and soil, and participate in the material cycle of the ecosystem, which is potentially harmful for a long time. Therefore, how to rationally and effectively utilize blast furnace slag resources has become the need of the iron and steel industry, building materials industry and other industries in recent years. [0003] The output of domestic waste incineration fly ash is usually 3-10% of the mass of waste incineration. Fly ash is clearly defined as h...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B11/26
Inventor 张宁张静文黄晓燕顾润剑
Owner 北科蕴宏环保科技(北京)有限公司
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