CN103084380B - Municipal solid waste processing system and processing method - Google Patents
Municipal solid waste processing system and processing method Download PDFInfo
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- CN103084380B CN103084380B CN201310041980.5A CN201310041980A CN103084380B CN 103084380 B CN103084380 B CN 103084380B CN 201310041980 A CN201310041980 A CN 201310041980A CN 103084380 B CN103084380 B CN 103084380B
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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
The present invention relates to a kind of system for treating municipal solid waste and processing method thereof.
Background technology
At present, the Treatment Way of Municipal Refuse in City extensively adopted both at home and abroad mainly contains sanitary landfills, burning, compost and comprehensive utilization (recycling utilization) 4 kinds of processing modes.
Sanitary landfills is a kind of innoxious final disposal mode of a kind of domestic waste grown up from traditional stacking and made ground process.Its disposal ability is large, does not need carry out categorised collection to rubbish or focus on, can collect biogas generate electricity when garbage loading embeading thickness is enough large, investment and operating cost lower.But landfill yard requires high to factory site, difficulty is large, and land occupation resource, easily causes secondary pollution, as percolate, landfill gas, flying dust and floating thing etc.The soil water body of surrounding area and air are affected greatly, very large to social influence in the neighbourhood, cause ample resources to waste simultaneously.Sanitary landfills is only applicable to land resource abundance, and landfill place is easily implemented, the area that local economy level falls behind relatively.At present, domestic most rubbish adopts landfill method, but wherein small part adopts sanitary landfills, and major part is all adopt simple and easy stacking.
Burning to refer in house refuse combustible, and in hot conditions (800 ~ 1000 DEG C), through combustion reaction, combustible component is fully oxidized, finally becomes the process of harmless stabilized ash.Burn minimizing degree high, innoxious effective, heat energy can be used to generating or heat production, and reach the effect of recycling, floor space is little, totally enclosed pattern, can not by the impact of natural conditions.But, its shortcoming is that one-time investment and operating cost are high, operational management difficulty is larger, easy generation secondary pollution, is difficult to control, there is dioxin contamination in tail gas, heavy metal pollution is had in tail ash, the recyclable resource of waste part, if want qualified discharge, high standard waste gas treatment equipment investment operating cost is high.It is only applicable to, and rubbish Lower heat value is high, and moisture content is low, developed area.Current developed countries uses many, declines to some extent in recent years, and Chinese development in recent years is very fast, but technology need to improve, and fails to reach discharge standard.
Compost utilizes microorganism to promote the Biochemical processes that in house refuse, biodegradable organic matter transforms to humus artificially, and the product after process is compost.It can make full use of organic matter in garbage, and composting production can be used for fertilizer, and secondary pollution is less, easily controls, one-time investment and operating cost relatively low.But the volume reduction rate of rubbish is low, also has the residue of 30-40% to need landfill disposal, easily produce stench in composting process, produce surrounding enviroment and pollute, floor space is relatively large, and because the impurity content of compost is high, fertilizer efficiency is low, and fertilizer market is generally bad.Compost is only applicable to that labile organic compound composition in rubbish is high, and economic condition is not high, the area that treating capacity is low.Compost is many in Europe application, and the development of domestic " the Seventh Five-Year Plan, eight or five " period is very fast, and successful example is few, and fertilizer market is poor, and be difficult to maintain operation, major part is simple and easy compost, and secondary pollution is large.
Comprehensive utilization refers to first classifies to house refuse, then adopts suitable method to process respectively all kinds of product, and reach the object of comprehensive utilization of resources, it integrates all kinds of processing method.Its advantage achieves garbage harmless, resource, minimizing at the bottom of maximum limit, and secondary pollution is little, biogas can be used to generating, fertilizer impurity is few, investment and operating cost moderate, floor space is less.But want to realize recycling utilization completely, its input cost is large, and the treatment system related to is complicated, and equipment needed thereby requires high.
Summary of the invention
According to above-mentioned weak point, the object of this invention is to provide a kind of applicability is strong, treating capacity is large, treatment effect is good refuse disposal system and processing method thereof.
For achieving the above object, technical scheme of the present invention is: a kind for the treatment of system of domestic waste, and it comprises sorting system, pretreatment system and anaerobic fermentation system.Sorting system comprises receiving cone, is positioned at the apron feeder bottom receiving cone, even material toggling bag-breaking device and cylinder bag-broken screening machineifier, wherein, apron feeder is connected with the import of even material toggling bag-breaking device, the outlet of even material toggling bag-breaking device is connected with large part selection platform, and large part selection platform is connected with cylinder bag-broken screening machineifier; Cylinder bag-broken screening machineifier is also connected with pneumatic separation device and sorting platform, and wherein, sorting platform is connected with pretreatment system.Pretreatment system comprises breaker, sand water separation device and receives with the rubbish that is connected of sorting platform and struggles against, and rubbish reception is struggled against and is connected with sand water separation device with breaker by conveyer; Sand water separation device inside is provided with deslagging spiral, grid, gas/water circle device and revolution crushing device; Sand water separation device is connected with anaerobic fermentation system by elevator pump.Anaerobic fermentation system comprises the homogeneous pond be connected with elevator pump, and homogeneous pond is connected with anaerobic digestor; Anaerobic digestor is connected with sludge storage pool with marsh gas purifying, electricity generation system respectively, and described sludge storage pool is also connected with mud and water treatment system.
Preferably: in described cylinder bag-broken screening machineifier, be provided with bag-breaking device and screen cloth, wherein, the sieve diameter of screen cloth is 60-90mm.
Preferably: described pneumatic separation device is connected with light materials sorting platform and heavy substance sorting platform; Wherein, heavy substance sorting platform is connected with cylinder bag-broken screening machineifier with super power crusher by ferromagnetic deironing device successively.
Preferably: between described sorting platform and pretreatment system, be provided with ferromagnetic deironing device.
Preferably: described breaker is divided into one-level disintegrating machine and secondary breaker, described sand water separation device is divided into one-level grit water separator and secondary grit water separator, wherein, rubbish receives bucket and is connected with one-level disintegrating machine, and being connected with one-level grit water separator, secondary breaker, secondary grit water separator successively, described secondary grit water separator is connected with elevator pump.
The present invention also provides a kind of processing method of domestic waste, and its operating procedure is
(1) municipal garbage is weighed, even material toggling after broken bag, the mode combined by machine screening, selection by winnowing and artificial separation will be loaded in mixture rubbish and classify;
(2) by selection after organic waste through break process;
(3) material after fragmentation first dilutes, and through the water-bed heavy inorganic matter of spiral deslagging process removing after dilution, through the floating thing of the grid removing water surface, all the other organic materials are broken further through revolution crushing device;
(4) the organic waste material removing inorganic matter carries out intermediate temperature anaerobic fermentation.
Preferably: load in mixture in described step (1) rubbish classify after sorting process time, labile organic compound part enter after belt conveyor magnetic separation pretreatment workshop receive bucket; Brick and tile are sent to organoclay workshop, concentrate and send landfill disposal; Combustible send combustion plant to focus on according to combustible; Plastics send plastics segmentation workshop to carry out classification and reclaim, and recyclable plastics is not as combustible process; Recyclable rubbish send regrowth workshop, sells as regenerant.
Preferably: the weight obtained through selection by winnowing in described step (1) is pulverized further after sorting and magnetic separation, and be back to cylinder bag-broken screening machineifier and again sieve.
Preferably: the water that in described step (3), organic waste dilution adopts is the recycle-water of water treatment system after ammonia nitrogen removal process.
Preferably: described step (4) anaerobic digestor charging solid content is 3-5%, and in tank, typical mean solids content is at 1.5-3%, more than the 22 days time of staying, and organic materials granularity is below 10mm.
Beneficial effect of the present invention is: the present invention achieves by being provided with sorting system, pretreatment system and anaerobic fermentation system: 1, innoxious: guarantee that treated house refuse, sewage really realize innoxious, natural environment do not polluted, do not threaten health, beautify the Nature that the mankind depend on for existence, green health home of building together; 2, resource: fully excavate and can utilize regenerated resources, improve resource reutilization rate, limited resource is effectively recycled; 3, minimizing: adopt high-tech means, make the discarded object of non-degradable and non-renewable utilization realize minimum quantization, to reduce the pressure of discarded object to environment for human survival.
Accompanying drawing explanation
Fig. 1 is apparatus figure of the present invention.
Fig. 2 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described.
Apparatus figure is as shown in Figure 1 known, a kind for the treatment of system of domestic waste, and it comprises sorting system, pretreatment system and anaerobic fermentation system.Sorting system comprises receiving cone, is positioned at the apron feeder bottom receiving cone, even material toggling bag-breaking device and cylinder bag-broken screening machineifier, and be provided with bag-breaking device and screen cloth in described cylinder bag-broken screening machineifier, the sieve diameter of screen cloth is 60-90mm.Wherein, apron feeder is connected with the import of even material toggling bag-breaking device, and the outlet of even material toggling bag-breaking device is connected with large part selection platform, and large part selection platform is connected with cylinder bag-broken screening machineifier; Cylinder bag-broken screening machineifier is also connected with pneumatic separation device and sorting platform, and described pneumatic separation device is connected with light materials sorting platform and heavy substance sorting platform; Wherein, heavy substance sorting platform is connected with cylinder bag-broken screening machineifier with super power crusher by ferromagnetic deironing device successively.Sorting platform is connected with pretreatment system.Ferromagnetic deironing device is provided with between sorting platform and pretreatment system.Pretreatment system comprises breaker, sand water separation device and receives with the rubbish that is connected of sorting platform and struggles against, and rubbish reception is struggled against and is connected with sand water separation device with breaker by conveyer.Breaker is divided into one-level disintegrating machine and secondary breaker, described sand water separation device is divided into one-level grit water separator and secondary grit water separator, wherein, rubbish receives bucket and is connected with one-level disintegrating machine, and being connected with one-level grit water separator, secondary breaker, secondary grit water separator successively, described secondary grit water separator is connected with elevator pump.Sand water separation device inside is provided with deslagging spiral, grid, gas/water circle device and revolution crushing device; Sand water separation device is connected with anaerobic fermentation system by elevator pump.Anaerobic fermentation system comprises the homogeneous pond be connected with elevator pump, and homogeneous pond is connected with anaerobic digestor; Anaerobic digestor is connected with sludge storage pool with marsh gas purifying, electricity generation system respectively, and described sludge storage pool is also connected with mud and water treatment system.
Fig. 2 is process chart of the present invention.
Embodiment 1
A processing method for domestic waste, its operating procedure is:
(1) municipal garbage is weighed, even material toggling after broken bag, the mode combined by machine screening, selection by winnowing and artificial separation will be loaded in mixture rubbish and classify;
(2) by selection after organic waste through break process;
(3) material after fragmentation first dilutes, and through the water-bed heavy inorganic matter of spiral deslagging process removing after dilution, through the floating thing of the grid removing water surface, all the other organic materials are broken further through revolution crushing device;
(4) the organic waste material removing inorganic matter carries out intermediate temperature anaerobic fermentation.
Wherein, load in mixture in step (1) rubbish classify after sorting process time, labile organic compound part enter after belt conveyor magnetic separation pretreatment workshop receive bucket; Brick and tile are sent to organoclay workshop, concentrate and send landfill disposal; Combustible send combustion plant to focus on according to combustible; Plastics send plastics segmentation workshop to carry out classification and reclaim, and recyclable plastics is not as combustible process; Recyclable rubbish send regrowth workshop, sells as regenerant.
The weight obtained through selection by winnowing in step (1) is pulverized further after sorting and magnetic separation, and is back to cylinder bag-broken screening machineifier and again sieves.
The water that in step (3), organic waste dilution adopts is the recycle-water of water treatment system after ammonia nitrogen removal process.
Anaerobic digestor charging solid content is 3%, and in tank, typical mean solids content is 1.5%, and 22 days time of staying, organic materials granularity is 10mm, and degradation effect of organic compound is high, and factor of created gase is also high.
Embodiment 2
As different from Example 1, technological parameter during anaerobic fermentation is different, and anaerobic digestor charging solid content is 5%, and in tank, typical mean solids content is 3%, and 25 days time of staying, organic materials granularity is 8mm, and degradation effect of organic compound is high, and factor of created gase is also high.
Embodiment 3
As different from Example 1, technological parameter during anaerobic fermentation is different, and anaerobic digestor charging solid content is 4%, and in tank, typical mean solids content is 2.5%, and 30 days time of staying, organic materials granularity is 5mm, and degradation effect of organic compound is high, and factor of created gase is also high.
What the present invention adopted is anaerobic fermentation, and wherein aerobic fermentation compares with the pluses and minuses of anaerobic fermentation and is shown in Table 1:
Table 1 aerobic fermentation and anaerobic fermentation comparative analysis
Anaerobic fermentation carbohydrate, protein and fat etc. under anaerobic, through various bacteria in synergy, first the material of simple and stable is resolved into, continuation effect finally generates the main component of the biogas such as methane and carbon dioxide, is exactly briefly that organic matter is degraded to biogas by microbial process.
A degraded point three phases carries out: first, the complicated organic substance decomposings such as polysaccharide, lipid, protein are become monose, as glucose (C by the bacterium of hydrolysis
6h
12o
6).Second stage, acetic acid bacteria is converted into these sugar in the aliphatic acid formed primarily of acetic acid.Finally, convert fatty acids is biogas by methane backeria again.
According to different bacterium optimum growth temperature section, anaerobic fermentation is divided into hot fermentation (42-75 DEG C), mesophilic digestion (20-42 DEG C) and cold fermentation (5-20 DEG C).The present invention adopts mesophilic digestion (37 DEG C).
The biogas produced after fermentation generates electricity after purified treatment, and the mud after fermentation separately deals with through sludge treating system.
Through present system day process domestic waste 300t, daily generation 2.6 ten thousand KWh.Native system floor space is little, valuable material utilization rate is high in non-secondary pollution, rubbish.
Claims (8)
1. a treatment system for domestic waste, it comprises sorting system, pretreatment system and anaerobic fermentation system,
Sorting system comprises receiving cone, is positioned at the apron feeder bottom receiving cone, even material toggling bag-breaking device and cylinder bag-broken screening machineifier, wherein, apron feeder is connected with the import of even material toggling bag-breaking device, the outlet of even material toggling bag-breaking device is connected with large part selection platform, and large part selection platform is connected with cylinder bag-broken screening machineifier; Cylinder bag-broken screening machineifier is also connected with pneumatic separation device and sorting platform, and wherein, sorting platform is connected with pretreatment system;
Pretreatment system comprises breaker, sand water separation device and receives with the rubbish that is connected of sorting platform and struggles against, and rubbish reception is struggled against and is connected with sand water separation device with breaker by conveyer; Described sand water separation device inside is provided with deslagging spiral, grid, gas/water circle device and revolution crushing device; Described sand water separation device is connected with anaerobic fermentation system by elevator pump;
Anaerobic fermentation system comprises the homogeneous pond be connected with elevator pump, and homogeneous pond is connected with anaerobic digestor; Anaerobic digestor is connected with sludge storage pool with marsh gas purifying, electricity generation system respectively, and described sludge storage pool is also connected with mud and water treatment system;
It is characterized in that: described pneumatic separation device is connected with light materials sorting platform and heavy substance sorting platform; Wherein, heavy substance sorting platform is connected with cylinder bag-broken screening machineifier with super power crusher by ferromagnetic deironing device successively; Ferromagnetic deironing device is provided with between described sorting platform and pretreatment system.
2. according to the treatment system of domestic waste according to claim 1, it is characterized in that: be provided with bag-breaking device and screen cloth in described cylinder bag-broken screening machineifier, wherein, the sieve diameter of screen cloth is 60-90mm.
3. according to the treatment system of domestic waste according to claim 1, it is characterized in that: described breaker is divided into one-level disintegrating machine and secondary breaker, described sand water separation device is divided into one-level grit water separator and secondary grit water separator, wherein, rubbish receives bucket and is connected with one-level disintegrating machine, and being connected with one-level grit water separator, secondary breaker, secondary grit water separator successively, described secondary grit water separator is connected with elevator pump.
4. adopt a processing method for the domestic waste of the treatment system of domestic waste according to claim 1, it is characterized in that: its operating procedure is
(1) municipal garbage is weighed, even material toggling after broken bag, the mode combined by machine screening, selection by winnowing and artificial separation will be loaded in mixture rubbish and classify;
(2) by selection after organic waste through break process;
(3) material after fragmentation first dilutes, and through the water-bed heavy inorganic matter of spiral deslagging process removing after dilution, through the floating thing of the grid removing water surface, all the other organic materials are broken further through revolution crushing device;
(4) the organic waste material removing inorganic matter carries out intermediate temperature anaerobic fermentation.
5. according to the processing method of domestic waste according to claim 4, it is characterized in that: load in mixture in described step (1) rubbish classify after sorting process time, labile organic compound part enter after belt conveyor magnetic separation pretreatment workshop receive bucket; Brick and tile are sent to organoclay workshop, concentrate and send landfill disposal; Combustible send combustion plant to focus on according to combustible; Plastics send plastics segmentation workshop to carry out classification and reclaim, and recyclable plastics is not as combustible process; Recyclable rubbish send regrowth workshop, sells as regenerant.
6. according to the processing method of domestic waste according to claim 4, it is characterized in that: the weight obtained through selection by winnowing in described step (1) is pulverized further after sorting and magnetic separation, and be back to cylinder bag-broken screening machineifier and again sieve.
7. according to the processing method of domestic waste according to claim 4, it is characterized in that: the water that in described step (3), organic waste dilution adopts is the recycle-water of water treatment system after ammonia nitrogen removal process.
8. according to the processing method of domestic waste according to claim 4, it is characterized in that: described step (4) digester charging solid content is 3-5%, in tank, typical mean solids content is at 1.5-3%, more than the 22 days time of staying, and organic materials granularity is below 10mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103357651B (en) * | 2013-07-11 | 2016-03-23 | 浙江延杭智能科技有限公司 | Domestic garbage treating system and processing method thereof |
| CN103350100B (en) * | 2013-08-02 | 2015-02-25 | 广东源盛生态环保科技有限公司 | Method for continuously filling domestic garbage by using landfill site filled with domestic garbage |
| CN104607437A (en) * | 2014-12-10 | 2015-05-13 | 广东源盛生态环保科技有限公司 | House-refuse rapid processing method based on combination application of microbe and machinery |
| CN105886330A (en) * | 2014-12-11 | 2016-08-24 | 北京中科洁能环境工程技术有限公司 | Municipal domestic solid waste integrated treatment process system |
| CN104690063B (en) * | 2015-01-05 | 2016-10-05 | 桑德环境资源股份有限公司 | Domestic garbage crushing method for separating |
| CN104498532A (en) * | 2015-01-09 | 2015-04-08 | 青岛绿色家园环境设备有限公司 | Process for producing methane by mixing and fermenting organic wastes |
| CN106540875A (en) * | 2015-09-21 | 2017-03-29 | 天津德为环保工程设备有限公司 | A kind of broken bag method when new domestic waste is sieved |
| CN107511388A (en) * | 2017-07-24 | 2017-12-26 | 深圳市海吉星环保有限责任公司 | A kind of organic perishable garbage anaerobic fermentation cogeneration of heat and power biogas slurry fertilizer manufacture and system |
| CN107511389A (en) * | 2017-07-24 | 2017-12-26 | 深圳市海吉星环保有限责任公司 | A kind of household waste hydraulic sorting and pulping process and processing system |
| CN108144951A (en) * | 2018-01-05 | 2018-06-12 | 孙向夷 | A kind of mobile garbage specification processing system |
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| JP2005288209A (en) * | 2004-03-31 | 2005-10-20 | Jfe Engineering Kk | Separation method of refuse and separation apparatus thereof |
| JP4724032B2 (en) * | 2006-03-28 | 2011-07-13 | 株式会社東芝 | Organic waste treatment system |
| CN102030567A (en) * | 2010-10-25 | 2011-04-27 | 赵泽明 | Processing method for comprehensive utilization of solid household refuse |
| CN102794293B (en) * | 2011-05-27 | 2014-04-09 | 北京昊业怡生科技有限公司 | Method for comprehensively treating municipal solid waste |
| CN203209417U (en) * | 2013-02-01 | 2013-09-25 | 青岛胶南绿茵环保科技有限公司 | Municipal household garbage treatment system |
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