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Heat-accumulating-type fly ash gasification smelting furnace

A gasification melting and melting furnace technology, applied in the field of solid waste recycling, can solve the problems of high energy consumption and poor melting effect, and achieve the effects of uniform material distribution, energy saving and good separation effect.

Pending Publication Date: 2017-05-24
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current melt-solidification technology has the problems of poor melting effect and high energy consumption.

Method used

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  • Heat-accumulating-type fly ash gasification smelting furnace
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  • Heat-accumulating-type fly ash gasification smelting furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The toxic equivalent (I-TEQ) of dioxin in the fly ash produced by the fluidized bed incinerator is 3.7ng / g. The fly ash gasification and melting furnace in the regenerator of the application is used to process the fly ash and control the melting in the furnace. The temperature is 1400 degrees Celsius, and then the indicators such as dioxins in the flue gas discharged from the melting furnace are detected (refer to Table 1). Negative impact.

[0059] Table 1 Changes of dioxins in slag before and after fly ash treatment

[0060] project fly ash slag Dioxins (ng / g) 320 0.012 Dioxin Toxic Equivalent (ng-TEQ / g) 3.7 0.00049

[0061] It can be seen from Table 2 that during the melting process, the fixation rates of heavy metals Cr and Zn are higher, while the fixation rates of volatile heavy metals Cu, Pb and Cd are lower. The leaching toxicity of molten slag is much lower than the limit value of the national identification standard for leachi...

Embodiment 2

[0066] The toxic equivalent (I-TEQ) of dioxin in the fly ash produced by the fluidized bed incinerator is 6.7ng / g. The fly ash gasification and melting furnace in the regenerator of the application is used to process the fly ash and control the melting in the furnace. The temperature is 1700 degrees Celsius, and then the indicators such as dioxins in the flue gas discharged from the melting furnace are detected (see Table 3). The removal rate of dioxins exceeds 99%, which is far below the emission standard and will not cause environmental pollution Negative impact.

[0067] Table 3 Changes of dioxins in slag before and after fly ash treatment

[0068] project fly ash slag Dioxins (ng / g) 640 0.004 Dioxin Toxic Equivalent (ng-TEQ / g) 6.7 0.00066

[0069] It can be seen from Table 4 that the main components of the resulting molten slag are CaO, Al 2 o 3 and SiO 2 , and its content accounts for about 99% of the total mass. And the higher content...

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Abstract

The invention discloses a heat-accumulating-type fly ash gasification smelting furnace. The heat-accumulating-type fly ash gasification smelting furnace comprises a hearth, a first heat storage chamber, a second heat storage chamber, a first nozzle, a second nozzle, a gas supply device, a fly ash inlet, a U-shaped slag outlet and a slag melting pond. A melting region and a deslagging region are defined inside the hearth. The first heat storage chamber communicates with the melting region through a first opening. The second heat storage chamber communicates with the melting region through a second opening. The first nozzle stretches into the melting region through the first opening. The second nozzle stretches into the melting region through the second opening. The gas supply device is connected with the first nozzle and the second nozzle. The fly ash inlet is formed in the hearth. The U-shaped slag outlet is formed in the lower end of the deslagging region. The slag melting pond comprises a slag melting chamber and a heat exchange chamber which are arranged in a spaced mode. The slag melting chamber is provided with a molten slag inlet and a glassy-state molten slag outlet. The molten slag inlet communicates with the U-shaped slag outlet. The heat exchange chamber is provided with a normal temperature air inlet and a preheated air outlet. The preheated air outlet is connected with the fly ash inlet and further communicates with the first heat storage chamber and the second heat storage chamber through a reversing valve. By the adoption of the heat-accumulating-type fly ash gasification smelting furnace, continuous melting treatment of rubbish fly ash can be achieved; and moreover, stability is high and energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource treatment, in particular, the invention relates to a regenerative fly ash gasification melting furnace. Background technique [0002] With the development of the economy, the continuous increase of the population and the improvement of people's living standards, the amount of urban waste generated is also increasing. Waste incineration treatment has been widely promoted in my country in recent years due to its high degree of "harmless, reduced, and resourceful" characteristics. In western developed countries, the application of waste incineration technology has a history of nearly 130 years, and it is still considered to be one of the most effective and economical waste disposal technologies. [0003] The main chemical composition of waste incineration fly ash is SiO 2 , CaO, Al 2 o 3 and Fe 2 o 3 , and a large amount of Cl - , SO 3 and alkali etc. Waste incineration fly ash ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/027F23G5/12F23G5/44F23G5/46
CPCF23G5/027F23G5/12F23G5/44F23G5/46F23G2201/40F23G2204/103F23G2206/10
Inventor 周方远张安强肖磊赵月晶蔡先明刘璐任浩华吴道洪
Owner SHENWU TECH GRP CO LTD
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