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Municipal solid waste processing system and processing method

A municipal solid waste treatment system technology, applied in the municipal solid waste treatment system and its treatment field, can solve the problems of waste of recyclable resources, difficulty in control, high investment and operation costs, etc., and achieve the effect of improving resource reuse rate and reducing pressure

Inactive Publication Date: 2013-05-08
QINGDAO JIAONAN GREENERY ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantages are high one-time investment and operating costs, difficult operation and management, easy to produce secondary pollution, difficult to control, dioxin pollution in tail gas, heavy metal pollution in tail ash, waste of some recyclable resources, if To meet the emission standards, the investment and operation costs of high-standard waste gas treatment equipment are high
However, in order to fully realize recycling, the input cost is high, the processing system involved is complicated, and the equipment required is high.

Method used

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  • Municipal solid waste processing system and processing method
  • Municipal solid waste processing system and processing method
  • Municipal solid waste processing system and processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A treatment method for municipal solid waste, the operation steps are:

[0030] (1) Weigh the municipal waste, divide the material evenly after breaking the bag, and classify the mixed waste through a combination of machine screening, winnowing and manual sorting;

[0031] (2) Shred the selected organic waste;

[0032] (3) The crushed material is diluted first, and after dilution, the inorganic matter with a large specific gravity at the bottom is removed through the spiral slag discharge treatment, the floating matter on the water surface is removed through the grid, and the remaining organic materials are further crushed by the rotary crushing device;

[0033] (4) Mesophilic anaerobic fermentation is carried out on organic waste materials from which inorganic substances have been removed.

[0034] Among them, when the mixed garbage in step (1) is sorted and processed, the degradable organic matter is magnetically separated by the belt conveyor and then enters the rec...

Embodiment 2

[0039] Different from Example 1, the process parameters during anaerobic fermentation are different. The solid content of the anaerobic digestion tank feed is 5%, the average solid content in the tank is 3%, the residence time is 25 days, and the particle size of the organic material is 8mm, the degradation rate of organic matter is high, and the gas production rate is also high.

Embodiment 3

[0041] Different from Example 1, the process parameters during anaerobic fermentation are different. The solid content of the anaerobic digestion tank feed is 4%, the average solid content in the tank is 2.5%, the residence time is 30 days, and the particle size of the organic material is 5mm, the degradation rate of organic matter is high, and the gas production rate is also high.

[0042] What the present invention adopted is anaerobic fermentation, wherein the advantages and disadvantages of aerobic fermentation and anaerobic fermentation are compared as shown in Table 1:

[0043] Table 1 Comparative analysis of aerobic fermentation and anaerobic fermentation

[0044]

[0045] Anaerobic fermentation decomposes carbohydrates, proteins, and fats under anaerobic conditions, through the synergistic action of a variety of bacteria, first decomposes them into simple and stable substances, continues to act, and finally generates the main components of biogas such as methane and...

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Abstract

The invention relates to a municipal solid waste processing system comprising a sorting system, a pretreatment system, and an anaerobic fermentation system. The sorting system comprises a receiving hopper, a plate feeder positioned on the bottom of the receiving hopper, a uniform material-toggling bag-breaking device, and a cylinder broken bag screening machine. The pretreatment system comprises a crushing device, a sand-water separation device, and a waste receiving hopper connected with a sorting platform. The waste receiving hopper is connected with the crushing device and the sand-water separation device through a conveyor. A slag-discharge screw, a grid, a gas / water circulation device, and a rotary crushing device are arranged in the sand-water separation device. The anaerobic fermentation system comprises a homogenization tank connected with a lift pump. The homogenization tank is connected with an anaerobic digestion tank. The anaerobic digestion tank is respectively connected with a biogas purification device, a power generation system, and a sludge storage tank. The system and the method provided by the invention have the advantages that: with the sorting system, the pretreatment system, and the anaerobic fermentation system, the waste is turned harmless, and is converted into resources. Also, the amount of waste is reduced.

Description

technical field [0001] The invention relates to a system for treating municipal domestic garbage and a treatment method thereof. Background technique [0002] At present, there are mainly four treatment methods for municipal solid waste widely used at home and abroad, including sanitary landfill, incineration, composting and comprehensive utilization (recycling). [0003] Sanitary landfill is a harmless final disposal method of municipal solid waste developed from traditional stacking and landfill treatment. It has a large processing capacity and does not require classified collection or centralized treatment of waste. When the thickness of the waste landfill is large enough, biogas can be collected for power generation, and the investment and operating costs are low. However, landfills have high requirements on the site, are difficult, occupy land resources, and are likely to cause secondary pollution, such as landfill leachate, landfill gas, flying dust and floating objec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 夏柏松朱由国王凯张汉彬
Owner QINGDAO JIAONAN GREENERY ENVIRONMENTAL SCI & TECH
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