Preparation method and preparation system for garbage and sludge mixed fuel

A mixed fuel and mixed material technology, applied in the field of solid waste resource utilization, can solve the problems of not fundamentally avoiding secondary pollution, reducing the output of secondary pollutants, and poor stability of fuel products, so as to reduce dioxin and The generation of a large amount of fly ash, high calorific value, and the effect of realizing resource utilization

Pending Publication Date: 2018-01-09
BEIJING SHENYUAN ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In the existing technology, there are few technologies and cases of mixing garbage and sludge to prepare fuel products. The technical process of preparing fuel products from garbage or slu

Method used

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  • Preparation method and preparation system for garbage and sludge mixed fuel
  • Preparation method and preparation system for garbage and sludge mixed fuel
  • Preparation method and preparation system for garbage and sludge mixed fuel

Examples

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Embodiment 1

[0079] Domestic garbage and municipal sludge are placed in the garbage storage bin and the sludge storage bin for short-term storage, and then transported to the coarse crushing device and the sludge drying device through the conveyor. Among them, the moisture content of domestic garbage is 45-55 wt%, and the moisture content of municipal sludge is 70-80 wt%.

[0080] The coarse crushing device crushes domestic waste to a particle size of 80-100mm, and then transports it to the screening device through a conveyor belt for further processing. The screening device is a drum type screening machine.

[0081] The screening process screens out inorganic substances such as inorganic slag in the crushed garbage, and the screening efficiency is 80% to 90%. The inorganic slag under the screen is transported outside for treatment, and the waste on the screen is transported to the magnetic separation device for further processing.

[0082] The magnetic separation device selects the ferr...

Embodiment 2

[0092] The difference between Example 2 and Example 1 is that in the process of preparing the mixture, the mass ratio of pretreated garbage to dry sludge is 1:3, and the amount of laterite nickel ore dry powder added is the same as that of dry sludge and pretreated 15% of the total mass of garbage, the mixture is extruded in a molding device to obtain a spherical fuel product, after drying, the fuel product has a moisture content of 28wt%, a particle size of 12mm, and a cold strength of 55kg / The ball has a thermal strength of 20kg / ball, and the breakage rate is 5% when dropped naturally for two meters.

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Abstract

The invention relates to a preparation method and a preparation system for garbage and sludge mixed fuel. The method comprises the following steps: performing drying, crushing and screening pretreatment on garbage so as to obtain pretreated garbage; drying sludge until the moisture content is 50-60wt% so as to obtain dried sludge; uniformly mixing the pretreated garbage with the dried sludge so asto obtain a mixture; molding the mixture to obtain a molded material; and drying the molded material, thereby obtaining the mixed fuel. According to the method disclosed by the invention, productionof dioxin and fly ash can be effectively reduced, bad smell, sewage and the like produced in the storage or transporting process can be reduced, the cost is saved, and the fuel product is high in strength and high in stability.

Description

technical field [0001] The invention relates to the field of resource utilization of solid waste, in particular to a method and system for preparing mixed fuel of garbage and sludge. Background technique [0002] With the expansion of cities and people's concern about environmental protection, how to effectively deal with the growing domestic waste and sewage sludge has become a crucial issue. At present, the annual output of domestic garbage in my country is about 250 million tons, and the annual output of sewage sludge reaches 30 million tons. Garbage and sludge are easily leaked during natural storage or transportation and produce sewage, odor and other pollutants. Proper disposal will cause secondary pollution to the surrounding environment. However, the treatment capacity of garbage and sludge is limited, resulting in 2 / 3 of the cities in my country being surrounded by solid waste such as garbage and sludge. Municipal garbage and the environmental pollution caused by i...

Claims

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Application Information

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IPC IPC(8): C10L5/46
CPCY02E50/10Y02E50/30
Inventor 蔡先明陶进峰任浩华肖磊吴道洪
Owner BEIJING SHENYUAN ENVIRONMENTAL PROTECTION CO LTD
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