CN104607440A - Bio-drying-based domestic refuse treatment method - Google Patents
Bio-drying-based domestic refuse treatment method Download PDFInfo
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- CN104607440A CN104607440A CN201410834645.5A CN201410834645A CN104607440A CN 104607440 A CN104607440 A CN 104607440A CN 201410834645 A CN201410834645 A CN 201410834645A CN 104607440 A CN104607440 A CN 104607440A
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Abstract
The invention provides a bio-drying-based domestic refuse treatment method. The method comprises the following steps: (1), pre-treatment: feeding domestic refuses into a negative-pressure receiving room to break bags and manually select; performing innocent treatment on selected harmful refuses which have potential pollution threats to the soil and the underground water, and crushing selected large-size refuses in a large-size refuse crusher, wherein the crushed large-size refuses are treated in a step (3), residual domestic refuses are treated in a step (2), and the air change rate of the negative-pressure receiving room is five to seven times per hour; (2), bio-drying: feeding the residual domestic refuses treated in the step (1) into a bio-drying storehouse, stacking to form a refuse dump body, and covering the refuse dump body with a selective semi-permeable membrane; (3), post-treatment: sequentially performing mechanical crushing, drum screen screening, magnetic separation, near-infrared separation and air separation on the dried products obtained in the step (2) and large-sized refuses crushed in the step (1); (4), tail end treatment: respectively recovering and utilizing according to property difference of products selected according to the step (3).
Description
Technical field
The invention belongs to field of garbage disposal, particularly relate to a kind of based on biological dewatered life refuse processing method.
Background technology
Due to residents'living habit and food feature, China's domestic waste has high-moisture percentage, high content of organics and low-calorie feature.It is very complicated that the garbage collecting and transferring mode of long-term mixed collection result also in the component of refuse entering treatment facility.The above-mentioned feature of China's domestic waste result in the series of technical in garbage processing procedure: (1) high-moisture and high viscosity cause mechanical sorting technological adaptability poor; (2) garbage compost low quality; (3) the high percolate from garbage filling field load that causes of content of organics is high, and intractability is large; (4) high-moisture percentage, high content of organics result also in the increase of waste treatment facility design capacity; (5) high-moisture percentage, low heat value cause that waste incineration is with high costs, inefficiency etc.How efficiently, reduce msw water content economically and become crucial problem urgently to be resolved hurrily in Urban Domestic Waste Comprehensive Treatment.
Biological dewatered technology is generally adopted to reduce house refuse moisture content at present both at home and abroad.Biological dewatered general principle is: in force ventilated situation, the heat of vaporization moisture utilizing house refuse organic matter fermentation to produce, and forced ventilation accelerates moisture evaporation, house refuse moisture content is significantly declined, thus realizes biological dewatered effect.Biological dewatered feature is without the need to external heat source, and energy source needed for mummification is movable in the aerobic fermentation of microorganism, and belonging to the biological energy source of material itself, is therefore a kind of very economical energy-conservation drying technique.Biological dewatered object is within the time short as far as possible, remove moisture as much as possible, realizes dehydration and drying and subtracts appearance decrement.Its product is general not for the purpose of soil is agricultural, but calorific value is reclaimed in landfill stabilization or burning, therefore does not need to reach highly to become thoroughly decomposed.Even requiring the degradation capability of suitable restriction micro-organisms when taking burning as final disposal target, keeping the organic component in product as far as possible, thus improving product calorific value.Burning can cause a lot of harmful effect to environment, and cannot realize resource, the reusing of energy source of rubbish.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of based on biological dewatered life refuse processing method.Primary domestic waste is disposed through pre-treatment, biological dewatered, post processing and end successively, achieves consumer waste innocent, minimizing Treatment and recovery, recovery energy.
Provided by the invention based on biological dewatered life refuse processing method, comprise the steps:
1) pre-treatment: house refuse enters between negative pressure reception, successively through garbage bag breaking machine broken bag and artificial separation process, the Harmful Waste that sub-electing has potential pollution to threaten to soil and groundwater carry out harmless treatment, sub-elect Bulky Waste enters step 3) process after Bulky Waste crusher in crushing, residue house refuse enters step 2) process, rate of ventilation per hour 5 ~ 7 times between negative pressure receives;
2) biological dewatered: the residue house refuse after step 1) process sends into biological dewatered storehouse, pile up for junk-heap body; Junk-heap body covers selective pellicle, utilizing microorganism aerobic to ferment the water transform in house refuse is steam, is discharged by steam in conjunction with forced ventilation; Wherein, described selective pellicle is composited by sandwiched polypropylene hollow fiber membrane in the middle of two-layer chemical fibre class textile material; Oxygen concentration 3mg/L ~ 8mg/L in described biological dewatered storehouse, temperature is 20 DEG C ~ 55 DEG C, and open ventilation and heat when temperature is more than 55 DEG C, the highest control temperature is no more than 60 DEG C; Described microorganism aerobic fermentation time is 20 days ~ 25 days;
3) post processing: to step 2) Bulky Waste after the mummification product that obtains and step 1) fragmentation carries out Mechanical Crushing, rotary screen screening, magnetic separation, near-infrared sorting and selection by winnowing successively;
4) end is disposed: the difference according to step 3) sorting product characteristics is recycled respectively.
As optimal technical scheme, step 2) junk-heap body was turned over once every 7 ~ 10 days in described biological dewatered process.
Preferably, described polypropylene hollow fiber membrane thickness 40 μm ~ 50 μm, 0.1 μm ~ 0.2 μm, aperture, porosity 50% ~ 55%.
As optimal technical scheme, the base plate between described negative pressure receives offers at least one guide french drain, guide french drain runs through the base plate between the reception of described negative pressure; Be provided with leachate collecting pipe in described guide row ditch, described leachate collecting pipe connects leachate collecting well.
Preferably, described base plate along guide row ditch axis have 1% ~ 2% the gradient.
Preferably, described base plate tilts to have the gradient being not less than 1% to the axial line of guide row ditch.
Preferably, described leachate collecting pipe comprises the geotextiles that tube wall is provided with multiple hole HDPE pipe and is coated on outside HDPE pipe, is more preferably HDPE geotextiles.
As optimal technical scheme, the base plate in described biological dewatered storehouse offers at least one guide french drain, guide french drain runs through the base plate between the reception of described negative pressure; Be provided with leachate collecting pipe in described guide row ditch, described leachate collecting pipe connects leachate collecting well.
Preferably, described base plate along guide row ditch axis have 1% ~ 2% the gradient.
Preferably, described base plate tilts to have the gradient being not less than 1% to the axial line of guide row ditch.
Preferably, described leachate collecting pipe comprises the geotextiles that tube wall is provided with multiple hole HDPE pipe and is coated on outside HDPE pipe, is more preferably HDPE geotextiles.
The present invention can reach following beneficial effect:
Process of the present invention is based on the biological dewatered life refuse processing method biological dewatered process of 20 ~ 25 days, house refuse moisture content is reduced to less than 25% and improves Lower heat value to more than 2500Kcal/kg, mummification product can by primary waste reduction 45% alive through post processing, solve that domestic waste sorting is difficult, compost quality is low, sanitary landfills amount is large, percolate processing load is high, the low inferior series of problems of firing efficiency, make house refuse achieve innoxious, minimizing Treatment and recovery, recovery energy.
The present invention a kind of based on biological dewatered life refuse processing method to entering the domestic waste in biological dewatered storehouse without any particular/special requirement.Primary domestic waste directly enters biological dewatered storehouse without the need to carrying out any cracking and sorting after negative pressure reception, broken bag, avoids high-moisture percentage sorting consumer waste weak effect, the efficiency of separation this technical barrier low in pretreatment stage.
The present invention is a kind of adopts selective pellicle to cover junk-heap body based on biological dewatered life refuse processing method.Described selective pellicle is by least comprising one deck polypropylene hollow fiber membrane and the two-sided compound of two-layer chemical fibre class textile material is formed; Described polypropylene hollow fiber membrane thickness 40 μm ~ 50 μm, 0.1 μm ~ 0.2 μm, aperture, porosity 50% ~ 55%; Described polypropylene hollow fiber membrane, under the condition of work of 0.15Mpa ~ 0.2Mpa, normal temperature, can make the CO that microorganism aerobic fermentation produces
2with steam through, intercept the bacterium in the junk-heap body of more than 90%, colloidal suspended substance, particle, germ and the large molecule of foul smell etc. through, effectively stop external environment moisture to enter junk-heap body simultaneously.
The present invention is a kind of is prevent garbage leachate to the pollution of soil, underground water based on biological dewatered life refuse processing method, negative pressure receive between and biological dewatered storehouse base plate be provided with garbage leachate collect with guide system.
The present invention is a kind of based on biological dewatered life refuse processing method, biological dewatered process is carried out to domestic waste after, the remarkable decrement of house refuse, mummification product moisture content is less than 25%, Lower heat value is greater than 2500Kcal/kg, and stickiness reduces, and can sorting improve.
The present invention a kind of based on biological dewatered domestic garbage treating system and method to biological dewatered product adopt broken, sieve, magnetic separation, near-infrared sieve the post processing such as PVC, selection by winnowing.Because product moisture content is low, the efficiency of separation significantly improves.
The present invention a kind of based on biological dewatered domestic garbage treating system and method to sorting product according to respective different qualities, take resource recycling, compost respectively, prepare garbage derivatived fuel, burning electricity generation, the end such as sanitary landfills dispose, innoxious, the minimizing achieving Disposal of Domestic truly, resource and energy.
Accompanying drawing explanation
Fig. 1 is the process chart based on biological dewatered life refuse processing method of the present invention;
Fig. 2 be in the present invention negative pressure receive between structural representation;
Fig. 3 is biological dewatered storehouse part-structure schematic diagram in the present invention;
Fig. 4 is the guide row groove structure schematic diagram between negative pressure of the present invention receives and biological dewatered storehouse;
Fig. 5 is leachate collecting tube section schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described, can better understand the present invention and can be implemented, but illustrated embodiment is not as a limitation of the invention to make those skilled in the art.
As shown in Figure 1, of the present invention based on biological dewatered life refuse processing method, abandon the traditional life garbage disposal flow process of broken bag-fragmentation-sorting-(fermentation)-recycling, creationary pre-treatment-biological dewatered-post processing-the end that proposes disposes four steps, technology environmental protection, on external environment conditions such as water, air, soil without impact, and without methane isothermal chamber gas discharging.In better embodiment of the present invention, concrete steps are as follows:
1) pre-treatment: house refuse enter negative pressure receive between 1, successively through garbage bag breaking machine broken bag and artificial separation process, sub-elect to soil and groundwater exist potential pollution threaten Harmful Waste (old and useless battery etc.) carry out harmless treatment, (in this area, Bulky Waste refers to that size is greater than the furniture rubbish of 500mm to Bulky Waste, as sofa, bed etc.) after Bulky Waste crusher in crushing, enter step 3) process, residue house refuse enters step 2) process, 1 rate of ventilation per hour 5 ~ 7 times between negative pressure receives;
2) biological dewatered: the residue house refuse after step 1) process sends into biological dewatered storehouse 2, pile up for junk-heap body 20; For preventing the contaminated environment such as foul smell, pathogen, junk-heap body covers selective pellicle 21, utilizing microorganism aerobic to ferment the water transform in house refuse is steam, in conjunction with forced ventilation and turn over that (first 7 days of rubbish biological mummification is not turned over to heap body in good time, turned over once every 7 days) damp-heat water steam is discharged, reduce msw water content; Wherein, selective pellicle 21 is composited by sandwiched polypropylene hollow fiber membrane in the middle of two-layer chemical fibre class textile material, polypropylene hollow fiber membrane thickness 40 μm ~ 50 μm, 0.1 μm ~ 0.2 μm, aperture, porosity 50% ~ 55%, polypropylene hollow fiber membrane, under the condition of work of 0.15Mpa ~ 0.2Mpa, normal temperature, can make the CO that microorganism aerobic fermentation produces
2with steam through, intercept the bacterium in the junk-heap body of more than 90%, colloidal suspended substance, particle, germ and the large molecule of foul smell etc. through, effectively stop external environment moisture to enter junk-heap body simultaneously; Oxygen concentration 3mg/L ~ 8mg/L in biological dewatered storehouse 2, temperature is 20 DEG C ~ 55 DEG C, and open ventilation and heat when temperature is more than 55 DEG C, the highest control temperature is no more than 60 DEG C; After microorganism aerobic ferments 20 days ~ 25 days, outer without stopping ventilation during obvious steam effusion until selective pellicle 21.After biological dewatered, house refuse moisture content is reduced to and is not more than 25%, and Lower heat value is greater than 2500Kcal/kg, and mummification product can by primary waste reduction 45% alive through post processing;
3) post processing: step 2) the mummification product moisture content that obtains is low, stickiness reduces, can sorting significantly strengthen, carry out Mechanical Crushing (size 60mm), rotary screen screening, magnetic separation, near-infrared sorting (PVC(polyvinyl chloride) successively to the Bulky Waste after mummification product and step 1) fragmentation, the efficiency of separation is greater than 95%) and selection by winnowing;
4) end is disposed: sorting consumer waste can be the visibly different various sorting product of character by step 3), such as ferrous metal, nonferrous metal, inert material, PVC, mummification rubbish etc., then carry out respectively recycling for each component, compost, prepare the ends such as garbage derivatived fuel, burning electricity generation, sanitary landfills and dispose.
For preventing garbage leachate to the pollution of soil, underground water, between the present invention receives negative pressure and the structure in biological dewatered storehouse be further improved, between negative pressure receives 1 and biological dewatered storehouse 2 base plate be provided with garbage leachate and collect and guide system.
Concrete between negative pressure receives, 1 base plate 10 offering at least one guide french drain 11(is one in the present embodiment as shown in Figure 2 and Figure 4, is located at the centre of between negative pressure reception 1), guide french drain 11 runs through the base plate between the reception of (elongated) negative pressure; Be provided with leachate collecting pipe 12 in guide row ditch, leachate collecting pipe connects leachate collecting well.
Flow into leachate collecting well for ease of Leachate site, base plate has the gradient of 1% ~ 2% along the axis of guide row ditch.And entering Leachate site collecting pipe 12 for ease of the liquid stream of junk-heap body, base plate 10 tilts to have the gradient being not less than 1% to the axial line of guide row ditch 11.
As shown in Figure 5, in the present invention, leachate collecting pipe 12 comprises tube wall and is provided with multiple hole (aperture 20mm ~ 25mm) HDPE pipe 121 and is coated on HDPE(high density polyethylene (HDPE)) geotextiles 122(HDPE geotextiles outside pipe).
As shown in Figure 3, biological dewatered storehouse 2 is of a size of 50m × 10m × 2m, xoncrete structure, and its base plate 22 offering at least one guide french drain 23(present embodiment is two), guide french drain runs through the base plate 22 in biological dewatered storehouse 2; Be provided with leachate collecting pipe in guide row ditch 23, leachate collecting pipe connects leachate collecting well.
Between receiving with negative pressure 1, flow into leachate collecting well for ease of Leachate site, base plate has the gradient of 1% ~ 2% along the axis of guide row ditch.And entering Leachate site collecting pipe for ease of the liquid stream of junk-heap body, base plate tilts to have the gradient being not less than 1% to the axial line of guide row ditch.
Between receiving with negative pressure 1, leachate collecting pipe comprises tube wall and is provided with multiple hole (aperture 20mm ~ 25mm) HDPE and manages and be coated on HDPE(high density polyethylene (HDPE)) geotextiles (HDPE geotextiles) outside pipe, geotextiles can prevent leachate collecting pipe silting.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (10)
1. based on a biological dewatered life refuse processing method, it is characterized in that, comprise the steps:
1) pre-treatment: house refuse enters between negative pressure reception, successively through garbage bag breaking machine broken bag and artificial separation process, the Harmful Waste having potential pollution to threaten to soil and groundwater sub-elected carry out harmless treatment, sub-elect Bulky Waste enters step 3) process after Bulky Waste crusher in crushing, residue house refuse enters step 2) process, rate of ventilation per hour 5 ~ 7 times between negative pressure receives;
2) biological dewatered: the residue house refuse after step 1) process sends into biological dewatered storehouse, pile up for junk-heap body; Junk-heap body covers selective pellicle, utilizing microorganism aerobic to ferment the water transform in house refuse is steam, is discharged by steam in conjunction with forced ventilation; Wherein, described selective pellicle is composited by sandwiched polypropylene hollow fiber membrane in the middle of two-layer chemical fibre class textile material; Oxygen concentration 3mg/L ~ 8mg/L in described biological dewatered storehouse, temperature is 20 DEG C ~ 55 DEG C, and open ventilation and heat when temperature is more than 55 DEG C, the highest control temperature is no more than 60 DEG C; Described microorganism aerobic fermentation time is 20 days ~ 25 days;
3) post processing: to step 2) Bulky Waste after the mummification product that obtains and step 1) fragmentation carries out Mechanical Crushing, rotary screen screening, magnetic separation, near-infrared sorting and selection by winnowing successively;
4) end is disposed: the difference according to step 3) sorting product characteristics is recycled respectively.
2. life refuse processing method according to claim 1, is characterized in that, step 2) junk-heap body was turned over once every 7 ~ 10 days in described biological dewatered process.
3. life refuse processing method according to claim 1, is characterized in that, described polypropylene hollow fiber membrane thickness 40 μm ~ 50 μm, 0.1 μm ~ 0.2 μm, aperture, porosity 50% ~ 55%.
4. life refuse processing method according to claim 1, is characterized in that, the base plate between described negative pressure receives offers at least one guide french drain, and guide french drain runs through the base plate between the reception of described negative pressure; Be provided with leachate collecting pipe in described guide row ditch, described leachate collecting pipe connects leachate collecting well.
5. life refuse processing method according to claim 4, is characterized in that, described base plate along guide row ditch axis have 1% ~ 2% the gradient.
6. life refuse processing method according to claim 4, is characterized in that, described base plate tilts to have the gradient being not less than 1% to the axial line of guide row ditch.
7. life refuse processing method according to claim 4, is characterized in that, described leachate collecting pipe comprises the geotextiles that tube wall is provided with multiple hole HDPE pipe and is coated on outside HDPE pipe.
8. life refuse processing method according to claim 1, is characterized in that, the base plate in described biological dewatered storehouse offers at least one guide french drain, and guide french drain runs through the base plate between the reception of described negative pressure; Be provided with leachate collecting pipe in described guide row ditch, described leachate collecting pipe connects leachate collecting well.
9. life refuse processing method according to claim 8, is characterized in that, described base plate along guide row ditch axis have 1% ~ 2% the gradient, described base plate to guide row ditch axial line tilt have the gradient being not less than 1%.
10. life refuse processing method according to claim 8, is characterized in that, described leachate collecting pipe comprises the geotextiles that tube wall is provided with multiple hole HDPE pipe and is coated on outside HDPE pipe.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798049A (en) * | 2016-03-22 | 2016-07-27 | 张共敏 | Harmless treatment technology for town household garbage |
| CN105834201A (en) * | 2016-06-06 | 2016-08-10 | 北京润宇环保工程有限公司 | Bio-drying dehydration method and system for household garbage |
| CN106090933A (en) * | 2016-06-17 | 2016-11-09 | 北京高能时代环境技术股份有限公司 | The method and device of one way of life waste incineration and generating electricity |
| CN106824984A (en) * | 2017-01-12 | 2017-06-13 | 湖南万容科技股份有限公司 | A kind of life refuse processing method |
| CN107008735A (en) * | 2017-05-19 | 2017-08-04 | 贵州欧瑞信环保科技有限责任公司 | A kind of Combustion Properties of Municipal Solid Waste gasification process |
| CN107335676A (en) * | 2017-03-31 | 2017-11-10 | 蓝天众成环保工程有限公司 | A kind of method that urban and rural domestic refuse is pre-processed using mechanical biological method |
| CN108300533A (en) * | 2018-04-18 | 2018-07-20 | 光大环保技术研究院（南京）有限公司 | A kind of garbage derivatived fuel and preparation method thereof |
| CN108558290A (en) * | 2018-05-18 | 2018-09-21 | 阿尔法环能生物能源有限公司 | A method of manufacturing concrete using aging rubbish |
| CN110681668A (en) * | 2019-09-12 | 2020-01-14 | 广东绿洁能源科技有限公司 | Garbage processing method, device, equipment and storage medium |
| CN111207571A (en) * | 2019-10-21 | 2020-05-29 | 浙江锦鑫建设工程有限公司 | Movable garbage drying system utilizing tail gas waste heat |
| CN112474736A (en) * | 2020-11-18 | 2021-03-12 | 湖北松为科技有限公司 | Household garbage recycling treatment method |
| CN111174531B (en) * | 2019-10-21 | 2021-03-30 | 杭州锦江建设集团有限公司 | Organic garbage drying device and method |
| CN113578915A (en) * | 2021-06-17 | 2021-11-02 | 广东省建筑设计研究院有限公司 | Screening and decrement treatment system and method for stock garbage |
| CN114798663A (en) * | 2022-04-24 | 2022-07-29 | 成都建筑材料工业设计研究院有限公司 | Household garbage storage pit and leachate collection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105798049A (en) * | 2016-03-22 | 2016-07-27 | 张共敏 | Harmless treatment technology for town household garbage |
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| CN106090933A (en) * | 2016-06-17 | 2016-11-09 | 北京高能时代环境技术股份有限公司 | The method and device of one way of life waste incineration and generating electricity |
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| CN107008735A (en) * | 2017-05-19 | 2017-08-04 | 贵州欧瑞信环保科技有限责任公司 | A kind of Combustion Properties of Municipal Solid Waste gasification process |
| CN108300533A (en) * | 2018-04-18 | 2018-07-20 | 光大环保技术研究院（南京）有限公司 | A kind of garbage derivatived fuel and preparation method thereof |
| CN108558290A (en) * | 2018-05-18 | 2018-09-21 | 阿尔法环能生物能源有限公司 | A method of manufacturing concrete using aging rubbish |
| CN110681668A (en) * | 2019-09-12 | 2020-01-14 | 广东绿洁能源科技有限公司 | Garbage processing method, device, equipment and storage medium |
| CN111207571A (en) * | 2019-10-21 | 2020-05-29 | 浙江锦鑫建设工程有限公司 | Movable garbage drying system utilizing tail gas waste heat |
| CN111174531B (en) * | 2019-10-21 | 2021-03-30 | 杭州锦江建设集团有限公司 | Organic garbage drying device and method |
| CN112474736A (en) * | 2020-11-18 | 2021-03-12 | 湖北松为科技有限公司 | Household garbage recycling treatment method |
| CN113578915A (en) * | 2021-06-17 | 2021-11-02 | 广东省建筑设计研究院有限公司 | Screening and decrement treatment system and method for stock garbage |
| CN114798663A (en) * | 2022-04-24 | 2022-07-29 | 成都建筑材料工业设计研究院有限公司 | Household garbage storage pit and leachate collection method thereof |
| CN114798663B (en) * | 2022-04-24 | 2023-05-02 | 成都建筑材料工业设计研究院有限公司 | Household garbage storage pit and leachate collection method thereof |
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