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Waste incineration fly ash treatment system based on reduction

A waste incineration fly ash and treatment system technology, applied in the field of environmental protection technology and equipment, can solve the problems of large water consumption, high cost of sewage treatment and evaporation, high cost of solid-liquid separation, etc., and achieve economic and social effects

Active Publication Date: 2016-03-30
JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, heavy metals, salts and dioxins must be removed for resource utilization of waste incineration fly ash. The commonly used method is water washing. Method, this method mixes waste incineration fly ash and water under the condition of 1:2-1:3 to wash out chlorine salt, and reuses it many times. This method consumes a lot of water and the cost of solid-liquid separation is high
Publication No. CN203853372U introduces a method of washing out chlorine salts through 3 times of ultrasound, and reusing waste incineration fly ash residues as resources, but this method consumes a lot of water, and the cost of sewage treatment and evaporation is relatively high

Method used

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  • Waste incineration fly ash treatment system based on reduction
  • Waste incineration fly ash treatment system based on reduction
  • Waste incineration fly ash treatment system based on reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] S1: Feed fly ash with an initial moisture content of 5% and 17.5wt% CaO and water into the wet vibrating screen 2 with a sieve diameter of 38 μm at a solid-to-liquid ratio of 30:1, and stop the vibration after running for 0.5 hours. Collect 70% of the large-particle fly ash and mix it with water at a ratio of 1:6 and enter the washing tank 5 to stir and react for 2 hours, then enter the second solid-liquid separator 22 for separation for 0.5 hours, the liquid enters the waste water collection tank 8, and the solid enters the first fly ash Storage bin 3.

[0051] S2: Collect 30% of the small particle fly ash and the water in the water storage tank 10 and the water storage tank 6 into the electric coagulation device 9 with a solid-to-liquid ratio of 1:6, react for 1 hour at a temperature of 20°C and a current of 10A, and then enter The solid-liquid collection tank 4 then enters the first solid-liquid separator 21 for separation for 0.5h, the liquid enters the waste water ...

Embodiment 2

[0055] The operation steps are basically the same as in Example 1, only the parameters are different, and the specific parameters of the present embodiment are as follows:

[0056] S1: Feed fly ash with an initial moisture content of 5% and 17.5wt% CaO and water into the wet vibrating screen 2 with a sieve diameter of 50 μm at a solid-to-liquid ratio of 30:1, and stop the vibration after running for 0.5 hours. Collect 70% of the large particle fly ash and mix it with water at a ratio of 1:8 and enter it into the washing tank 5 for stirring and reacting for 2 hours, then enter the second solid-liquid separator 22 for separation for 0.5 hours, the liquid enters the waste water collection tank 8, and the solid enters the first fly ash Storage bin 3.

[0057] S2: Collect 30% of the small particle fly ash and the water in the water storage tank 10 and the water storage tank 6 into the electric coagulation device 9 with a solid-to-liquid ratio of 1:20, react for 1 hour at a temperat...

Embodiment 3

[0061] The operation steps are basically the same as in Example 1, only the parameters are different, and the specific parameters of the present embodiment are as follows:

[0062] S1: Feed fly ash and water with an initial moisture content of 3.5% and 20wt% CaO into the wet vibrating screen 2 with a sieve diameter of 75 μm at a solid-to-liquid ratio of 6:1, and stop the vibration after running for 0.5 hours. Collect 70% of the large-particle fly ash and mix it with water at a ratio of 1:6 and enter the washing tank 5 to stir and react for 2 hours, then enter the second solid-liquid separator 22 for separation for 0.5 hours, the liquid enters the waste water collection tank 8, and the solid enters the first fly ash Storage bin 3.

[0063] S2: Collect 30% of the small particle fly ash and the water in the water storage tank 10 and the water storage tank 6 into the electric coagulation device 9 with a solid-to-liquid ratio of 1:6, react for 1 hour at a temperature of 20°C and a ...

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Abstract

The invention discloses a waste incineration fly ash treatment system based on reduction, and relates to the field of environmental-friendly technology and equipment. The waste incineration fly ash treatment system based on reduction comprises a waste incineration fly ash storage and transportation device, a screening device, a first solid-liquid separator, a second solid-liquid separator, a washing tank, an electrocoagulation treatment device, a wastewater collecting tank and a water storage tank, wherein the water storage tank is connected to the electrocoagulation treatment device and the washing tank; the waste incineration fly ash storage and transportation device is connected to the screening device; the screening device is respectively connected to the washing tank and the electrocoagulation treatment device; the electrocoagulation treatment device is connected to a solid-liquid collecting tank; the solid-liquid collecting tank is connected to the first solid-liquid separator; the first solid-liquid separator is connected to a first fly ash storage bin; the washing tank is connected to the second solid-liquid separator; and the second solid-liquid separator is connected to the first fly ash storage bin. The waste incineration fly ash treatment system based on reduction can be used for dividing a waste incineration fly ash zone into a zone body rich in heavy metal and a zone body with low heavy metal content according to the grain size, and the heavy metal and the chlorine salt in the zone bodies are removed by virtue of different methods.

Description

technical field [0001] The patent of the present invention relates to the field of environmental protection technology and equipment, specifically a waste incineration fly ash treatment system based on reduction. Background technique [0002] With the rapid development of the national economy and the acceleration of the urbanization process, urban domestic waste [0003] The amount of waste generated is increasing day by day. In 2013, the domestic waste generated by 261 large and medium-sized cities across the country reached 1.61×10 8 t, and is growing rapidly at a rate of 10% per year. "Garbage besieged city" has become a major problem that needs to be solved urgently in urban development. The incineration method has been vigorously developed due to its obvious reduction effect and the ability to generate electricity. According to the requirements of the "12th Five-Year Plan for the Construction of Harmless Treatment Facilities for Urban Domestic Waste", by 2015, the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B2101/30
Inventor 苏明舟李军陈竹严圣军
Owner JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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