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Equipment and method of preparing activated slag by alkalization, cleaning and incineration disposal of household garbage

A technology of domestic waste and active slag, which is applied in the direction of combustion methods, lighting and heating equipment, incinerators, etc., and can solve problems such as poor incineration of wet waste, difficult environmental protection treatment, and heavy odor

Pending Publication Date: 2020-10-23
长沙紫宸科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) The ash after incineration is difficult to handle
Although waste incineration power plants all introduce the complete resource utilization of their ash, the technical method adopted by the units that carry out resource utilization of waste incineration ash is to first screen and separate the ash, and the selected plastic blocks are returned to the waste incinerator Internal incineration or disposal, removal of blocky plastic impurities, mixed with cement and other ash slag to make bricks or cement admixtures, most of the produced cement bricks have a strong odor within half a year and can only be used for roadbeds or outdoor enclosures, and the utilization rate is low
[0009] (3) Generally, there are two major environmental protection problems of "one solid and one liquid" of fly ash and leach concentrate
The concentration of heavy metals Zn, Pb, Cu, Cr, Cd, Hg and other harmful substances in the incineration fly ash is relatively high, especially the existing incineration technology makes it not very good to incinerate the fermented and dried wet garbage in the furnace, because the furnace is not completely The strong reducing atmosphere caused by combustion causes a part of the heavy metals to be reduced and evaporated into the flue gas. The heavy metals in the flue gas condense into fine particles as the temperature of the flue gas decreases and condense on the porous dust in the flue gas. Finally, they are dedusted by the flue gas together. The equipment captures and forms incineration fly ash

Method used

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  • Equipment and method of preparing activated slag by alkalization, cleaning and incineration disposal of household garbage
  • Equipment and method of preparing activated slag by alkalization, cleaning and incineration disposal of household garbage
  • Equipment and method of preparing activated slag by alkalization, cleaning and incineration disposal of household garbage

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The domestic waste in this example comes from fresh domestic waste collected by a garbage transfer station in a certain city, and its main components are melon skin, fruit and vegetable kitchen waste, garden trimming waste of flowers, plants, branches and leaves, and paper / plastic packaging. Detection: the moisture content fluctuates at 2.1-18.4%, the ash-slag rate fluctuates at 7.3-16.1%, and the low calorific value fluctuates at (1287-2974) x4.18KJ / Kg.

[0038] see figure 1 In this embodiment, the equipment for preparing active slag by alkalization clean incineration treatment of household garbage includes: biomass fuel burner 1, grate cooler 2, kiln head cover 3, rotary kiln 4, kiln tail chamber 5, three-stage alkali powder removal Acid preheater 6, two-stage plasma flame high-temperature purification exhaust gas device 7, kiln tail feeding device 8, the head and tail ends of the rotary kiln 4 are respectively provided with a kiln head cover 3 and a kiln tail chamber...

Embodiment 2

[0047] The domestic waste in this example comes from fresh domestic waste collected by a county’s waste transfer station, and its main components are melon skin, fruit and vegetable kitchen waste, garden trimming waste of flowers, plants, branches and leaves, and paper / plastic packaging. Detection: the moisture content fluctuates at 3.9-18.7%, the ash and slag rate fluctuates at 7.8-16.7%, and the low calorific value fluctuates at (1097-2942) x4.18KJ / Kg.

[0048] see figure 2 In this embodiment, the equipment for preparing active slag by alkalization clean incineration treatment of household garbage includes: biomass fuel burner 1, grate cooler 2, kiln head cover 3, rotary kiln 4, kiln tail chamber 5, four-stage alkali powder removal Acid preheater 6, four-stage plasma flame high-temperature purification exhaust gas device 7, kiln tail feeding device 8, modified garbage silo 9, air lock feeding equipment 10, purification and dust collector 11, high-pressure fan 12; the rotary...

Embodiment 3

[0057] The domestic waste in this example comes from fresh domestic waste collected by a garbage transfer station in a certain county and town. Detection: the moisture content fluctuates at 7.6-23%, the ash slag rate fluctuates at 7.4-16.4%, and the low calorific value fluctuates at (1004-2752) x4.18KJ / Kg.

[0058] like image 3 As shown, in this embodiment, the equipment for preparing active slag by alkalization clean incineration treatment of domestic waste includes: biomass fuel burner 1, grate cooler 2, kiln head cover 3, rotary kiln 4, kiln tail chamber 5, two-stage alkali Powder acid removal preheater 6, single-stage plasma flame high-temperature purification exhaust gas device 7, kiln tail feeding device 8, modified garbage silo 9, air lock feeding equipment 10, purification and dust collector 11, high-pressure fan 12, waste heat power generation Device 13, the head and tail ends of the rotary kiln 4 are respectively provided with a kiln head cover 3 and a kiln tail ch...

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Abstract

The invention relates to equipment of preparing activated slag by alkalization, cleaning and incineration disposal of household garbage. The equipment comprises a biomass fuel combustor, a grate cooler, a hot kiln hood, a rotary kiln, a kiln tail chamber, a multistage alkaline powder disacidifying preheater, a plasma flame high-temperature exhaust gas purification device and a kiln tail feeding device. A method of preparing activated slag by alkalization, cleaning and incineration disposal of household garbage comprises the following steps of (1) material preparation; (2) mixing of feeds to generate garbage derived materials; and (3) calcinations of the garbage derived materials. By taking combustibles such as biomass in household garbage as a fuel and inorganic minerals in the household garbage as a silicon raw material, the household garbage is disposed to a garbage derived fuel / raw material convenient for incineration by a simple cleaning disposal manner, so that biomass fuel components and inorganic minerals in the household garbage are recycled effectively. The equipment and method are low in carbon, energy-saving and emission-reducing, free of emission of waste residues, harmful wastewater and harmful exhaust, and facilitate environmental protection.

Description

technical field [0001] The present invention relates to a method for disposing of household garbage, in particular to a device and method for preparing active slag by alkalization, clean incineration of household garbage, and more specifically to a method for acid removal using biomass fuel burner + multi-stage alkali powder Preheater + plasma flame high temperature exhaust gas purification device + equipment and method for preparing active slag by calcining household garbage in a rotary kiln. Background technique [0002] As we all know, municipal solid waste is discarded in people's life and work, including kitchen waste, fruits and vegetables, waste paper, fiber fabrics, packaging materials, and wastes mainly caused by vegetation and plant stumps and leaves produced by environmental sanitation work in community streets and gardens. All kinds of packaging are plastic products such as plastic bags, and most of the rest are biomass containing a small amount of cement stone a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/02F23G5/033F23G5/08F23G5/20F23G5/44F23G5/46
CPCF23G5/02F23G5/033F23G5/08F23G5/20F23G5/444F23G5/46F23G2900/50207
Inventor 尹小林余智英
Owner 长沙紫宸科技开发有限公司