CN104178185A - Kitchen waste pyrolysis treatment technique - Google Patents
Kitchen waste pyrolysis treatment technique Download PDFInfo
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- CN104178185A CN104178185A CN201410408057.5A CN201410408057A CN104178185A CN 104178185 A CN104178185 A CN 104178185A CN 201410408057 A CN201410408057 A CN 201410408057A CN 104178185 A CN104178185 A CN 104178185A
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Abstract
The invention discloses a kitchen waste pyrolysis treatment technique which comprises the following steps: carrying out preliminary crushing on garden waste, and pressurizing kitchen waste for drainage; proportionally mixing, sending into a rotary reaction furnace, and pyrolyzing the waste mixture into vapor, pyrolysis gas, carbon, tar and dust; combusting the clean pyrolysis gas as a fuel to directly provide a heat source for rotary kiln reaction furnace pyrolysis equipment; and finally, cooling the high-temperature carbon generated by pyrolysis, and discharging, thereby completing the kitchen waste/garden waste mixed pyrolysis treatment. By using the indirect-heating rotary kiln pyrolysis equipment, the flue gas for heating the rotary kiln does not directly contact the pyrolysis materials, thereby enhancing the quality of the pyrolysis gas and enhancing the quality and yield of the carbon. The pyrolysis gas is washed and directly combusted to heat the rotary kiln, thereby requiring fewer pyrolysis auxiliary energy sources and lowering the operating cost.
Description
Technical field
The present invention relates to a kind of offal treatment technique, particularly a kind of by more than kitchen and two kinds of wastes of garden waste mix by the novel process of pyrolysis processing.
Background technology
Kitchen waste refers to a kind of perishable domestic organic garbage, and its main component is leftovers, leftovers, pericarp, dish leaf, plastics bag etc., starch, Mierocrystalline cellulose, protein, lipid and inorganic salt, consists of.It mainly contains the features such as water ratio is high, perishable, nutritive substance is many.As processed not in time, will affect human settlement, produce stench, and percolate wherein can polluted surface water and underground water.In addition, if dealt with improperly, also will produce harm, for example pasture, makes objectionable impurities be accumulated in each position of pig, and people eat such pork, will be detrimental to health; If extracted " sewer oil " by lawless person, as food oils, eaten, also will be detrimental to health.
Present stage, the main treatment technology of kitchen waste has: (1) anaerobically fermenting: by anerobe, high molecular mass degradation is become to micromolecular material, be finally converted into biogas.The biogas producing can be converted into electric energy and heat energy by co-generator, and electric energy can be by being connected to the grid for productive life, and heat energy can be used as municipal heating facility and uses.Natural pond slag through squeezing after as organic fertilizer for agriculture production.This technique is more ripe, and engineering application is also more, but has long processing period, is about 15 ~ 25d, and the tank body that causes fermenting is large.In addition, owing to producing biogas bacterium, the nutritive ingredient of natural pond liquid, temperature and pH value etc. are had relatively high expectations, biogas output is unstable.(2) fodder is processed: kitchen waste is after solid-liquid separation, and the higher part of solid content is after High Temperature Sterilization is dried, and as biological fodder, liquid is through producing methane through anaerobic fermentation.The organic feed that this technique makes reenters food chain, finally gets back among human body, and risk is wherein unpredictable.(3) aerobic compost: refer under the condition of aerobic, make good use of oxygen animalcule and high molecular organic matter degradation is become to the process of inorganics.Aerobic composting process is simple, and the generation after processing can be used as chemical fertilizer for agriculture production, still due to its effect that mainly utilizes microorganism, makes long processing period, increase running cost.And if be not in airtight environment, easily produce foul smell, pollute surrounding enviroment.(4) landfill: refer to that kitchen waste and other domestic refuse that receipts are transported are mixed in together, directly enter landfill yard and carry out landfill.This Technology is simple, and processing cost is low, but its treatment capacity is large, takies a large amount of land resources.And because rubbish from cooking water ratio is high, nutritive element content is high, in landfill yard, easily produce biogas, use landfill yard to have the danger of blast.
Garden waste is mainly the residual branch of the plant to producing in the pruning of green plants and Renewal process and broken leaf etc., and its generation is along with city ecology construction, green coverage increase sharply and increase.For a long time, the garden waste of China mainly be take simple and easy landfill as main, accounts for the more than 90% of whole treatment capacities.The simple and easy landfill of rubbish not only takies a large amount of soils, has also increased trucking costs and has disposed load, and also having caused the wasting of resources.Shortcoming for simple and easy landfill, there is researchist to start garden waste to carry out recycling treatment, as the patent No. is formerly: 201110253821.2 disclose a kind for the treatment of process for green waste and uses thereof: by garden waste powder, cotton benevolence cake powder, Semen Maydis powder, wheat bran, the peat composed of rotten mosses and loam, mix by weight, add water, adjust pH, sterilizing, add streptomyces microflavus, in 26 ~ 32 ℃, carry out fermentative processing 5 ~ 8 days, the treatment agent that tunning is planted as production.But this kind of complex process, required other material are numerous and diverse, processing cost is high, and processes Zhou Lichang.
As can be seen here, all there are many shortcomings in the remaining and treating process for green waste in present kitchen, is badly in need of perfectly, or develops new treatment process.
Pyrolysis, as a kind of refuse treatment new technology, is applied to the fields such as biomass processes, greasy filth refiltered oil, coal just gradually.Pyrolysis is under the condition of anaerobic or anoxic, and organic cracking is become to pyrolysis gas, bio oil, charcoal.Wherein pyrolysis gas, after purifying, can be used as high-quality combustion gas; Bio oil can be used as the oil fuel of oil engine, internal combustion turbine after refining; Charcoal can be used as fuel, soil improvement agent, prepares gac etc.Pyrolysis is that moisture content is low to the requirement of raw material, and viscosity is low, calorific value is high.The features such as kitchen waste, because its main component is that main component is leftovers, leftovers, pericarp, dish leaf, plastics bag etc., is comprised of starch, Mierocrystalline cellulose, protein, lipid and inorganic salt, and it mainly contains, and water ratio is high, perishable, nutritive substance is many.Individual curing is not suitable for pyrolysis, so does not pass through the application of pyrolysis processing kitchen waste in prior art.
In city, more than kitchen, be two main rubbish sources with garden waste, and along with the generation speed of these two kinds of wastes of growth in the living standard also swashs acute rising, because speed and the land resources of existing processing more and more cannot meet the demand of these two kinds of offal treatments.
Summary of the invention
For above defect, the present invention proposes a kind ofly by more than kitchen and garden waste processings that be mixed, processing speed is soon, treatment facility floor space is little, and meets the new offal treatment technique of energy-conserving and environment-protective requirement.
To achieve these goals, the invention provides a kind of kitchen waste heat solution treatment process, it is characterized in that, it comprises the steps:
(1) garden waste is carried out to preliminary fragmentation;
(2) kitchen waste is pressurizeed drainage;
(3) kitchen waste after step (1) and step (2) processing and garden waste are thrown in storage hole in proportion, employing instrument is uniformly mixed into waste mixture by kitchen waste and garden waste;
(4) waste mixture step (3) being generated is transported to pulverizer and carries out crushing operation, and waste mixture is further pulverized and mixed more even;
(5) the waste mixture after step (4) is pulverized is sent in reacting in rotary kiln stove, carries out pyrolysis, by pyrolysis respectively by waste mixture respectively pyrolysis be: water vapor, pyrolysis gas, carbon, tar and dust;
(6) first pyrolysis gas is carried out to washing operation, except tar removing and dust, then adopt the separator that anhydrates to isolate the water vapor mixing with pyrolysis gas, and obtain the clean pyrolysis gas that can directly burn;
(7) clean pyrolysis gas step (6) being obtained is as fuel combustion, directly for reacting in rotary kiln stove pyrolysis plant provides thermal source;
(8) by pyrogenous origin pyrocarbon, first pass through cooling process, then discharge, complete more than kitchen and the processing of garden waste mixed pyrolysis.
Described kitchen waste heat solution treatment process, it is characterized in that described kitchen waste and garden waste throw in proportion into ratio be mass ratio, kitchen waste is 2:1 than garden waste.
Described kitchen waste heat solution treatment process, is characterized in that described being tentatively broken for: garden waste is carried out to shearing fragmentation, the size≤30mm after fragmentation.
Described kitchen waste heat solution treatment process, is characterized in that described crushing operation, and waste mixture is passed through to beater grinder, the size≤10mm of the waste mixture after pulverizing.
Described kitchen waste heat solution treatment process, is characterized in that kitchen waste and garden waste storage time≤48 hour in storage hole.
Described kitchen waste heat solution treatment process, is characterized in that a side in described storage hole to be provided with draining net, and further drop is except the superfluous water in kitchen waste.
Described kitchen waste heat solution treatment process, is characterized in that described washing operation completes by condensing washing tower, by the collision type separator that anhydrates, is completed and is isolated the water vapor mixing with pyrolysis gas.
Useful technique effect of the present invention is as follows: the present invention is more than kitchen and garden waste mixed pyrolysis, two kinds of solid waste that can disposable solution puzzlement city.Because kitchen waste water ratio is higher, there is viscosity, sneak into comparatively dryly, not after the sticking garden waste of tool, can facilitate for follow-up pulverizing and pyrolysis processing technique.By more than kitchen and garden waste mixed pyrolysis, it is long to solve the rubbish from cooking anaerobic treatment cycle, foul smell is large, treatment facility floor space large, treating processes temperature is controlled the problems such as complicated, and can solve because of the wasting of resources that garden waste landfill brings, takies the problem of landfill yard expensive real estate.The indirect heating type rotary kiln pyrogenation equipment that this invented technology adopts, because the flue gas of heating rotary kiln does not directly contact with pyrolysis material, has both improved the quality of pyrolysis gas, has improved again quality and the productive rate of charcoal.And after pyrolysis gas is washed, direct combustion heating rotary kiln, therefore required pyrolysis supplementary energy is few, reduces running cost.In addition,, because pyrolysis gas has been removed tar and dust after washing, the flue gas after perfect combustion can be without processing, directly discharge.The charcoal that pyrolysis produces is rich in micropore, and pore texture is flourishing, and specific surface area is large, has very strong adsorptive power.It can be used as soil improvement agent, can make loosing soil ventilation, keeps moisture, promotes microbial reproduction.Also be a kind of fuel of high-quality in addition, have low volatile, high heating value, burning complete, combustion processes is clean.In addition also can be used as the raw material of preparing gac, be applied to every field.
Accompanying drawing explanation
Fig. 1 is the schema of kitchen waste heat solution treatment process.
Fig. 2 is the process flow sheet of pyrolysis part.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the schema of kitchen waste heat solution treatment process, garden waste be all generally city in greening pruner process or the plant branch or the leaf that naturally drop, generally adopt shear crusher first to carry out preliminary fragmentation, the size≤30mm after fragmentation; Garden waste after fragmentation arrives the opening for feed of worm conveyor by forklift transport, by worm conveyor, be transported to storage hole.Rubbish from cooking main component is leftovers, dish leaf, pericarp, plastics bag etc., by special-purpose transport trolley, is collected and is transported to storage hole, and storage hole side is equipped with draining net, and the free water of rubbish from cooking flows out by draining net, is pumped to sewage works and processes; Also available employing pressurization water treatment plant pressurizes after drainage operates and is transported to storage hole.Adopt stack turner to carry out turning, garden waste and kitchen waste are mixed, wherein in storage hole, the mass ratio of garden waste and kitchen waste is 2:1.Stack turner in the process of walking, the material scraper mixing is entered to the opening for feed of scraper conveyor, by scraper conveyor, material being sent into pulverizer pulverizes, what pulverizer adopted is beater grinder, size≤10mm through crushing rear material, what thereby assurance kitchen was remaining and garden waste is mixed is more even, and the water ratio of crushing rear material is 33%, and calorific value is 14.39MJ/kg.
Material after pulverizing is directly transported in the feed bin of pyrolysis plant by worm conveyor, by feed system, be delivered to and in rotary kiln, carry out pyrolysis, wherein the temperature of rotary kiln front end is 110 ~ 120 ℃, 480 ~ 500 ℃ of middle temperature, the temperature of tail end is 230 ~ 260 ℃, and the residence time of material in kiln is 60 min.Pyrolysis gas enters washing tower and washs after discharging in kiln, removes tar, and the temperature entering before washing tower is 105 ~ 110 ℃, and after washing tower washing, temperature is 95 ~ 98 ℃, imports afterwards the collision type separator that anhydrates, and removes the moisture in pyrolysis gas.Pyrolysis gas finally imports combustion chamber, jointly burns with the probable gas of auxiliary fuel liquefied petroleum gas (LPG), and temperature of combustion is 650 ℃, and the flue gas that burning produces is introduced in the chuck of rotary kiln, heating rotary kiln, and the flue-gas temperature of discharging after heating rotary kiln is 75 ~ 80 ℃; Charcoal is discharged by the worm conveyor with indirect water-cooling, and the temperature of discharging charcoal is 40 ~ 43 ℃, and productive rate is 45%, and Lower heat value is 22.28MJ/kg, and total water is 8.88%, and volatilization is divided into 18.15%, and ash content is 27.36%, and fixed carbon is 45.61%.
Fig. 2 is the process flow sheet of pyrolysis part, and pyrolytic process is mainly completed by anhydrate separator, combustion chamber, discharging spiral conveyor of reacting in rotary kiln stove, condensing washing tower, collision type, specifically describes as follows:
Waste mixture after full and uniform and pulverizing, is temporarily stored in feed bin, by feed system, is input to reacting in rotary kiln stove, in reacting in rotary kiln stove, complete pyrolytic reaction, pyrolysis is gas and solid, and wherein gas comprises water vapor, pyrolysis gas, tar and dust, and solid is carbon; Reacting in rotary kiln stove adopts external-heat Reaktionsofen, and material, along with the upset of rotary kiln, constantly from contacting with kiln wall, obtains the pyrolysis energy.Hot flue gas does not contact with material, has improved the quality of pyrolysis gas and charcoal, and greatly reduces pyrolysis gas treatment capacity.
Gas enters condensing washing tower and carries out pyrolysis gas washing operation, condensing washing tower is a kind of spray scrubber, and washings be take diesel oil as main, and washings forms fine drop by nozzle, continuous tar and the dust of heat of adsorption in venting one's spleen, completes separated to tar and dust; Enter gas after separation and be input to the collision type separator that anhydrates, complete the separation to water vapour, this separator is a kind of tubbiness separator of steel, with the pyrolysis gas of moisture, collides ice-cold steel face, steam forms drop and condensation, thereby removes the moisture in pyrolysis gas.
Through the pyrolysis gas washing, pass into combustion chamber and burn, the hot gas of generation guides to the chuck of rotary kiln, heating rotary kiln.The hot gas producing when pyrolysis gas is not enough, rotary kiln can not be heated to required pyrolysis temperature, can be by adding auxiliary fuel, as Sweet natural gas, liquefied petroleum gas (LPG), burn together with pyrolysis gas, heating rotary kiln, the discarded fume emission that combustion chambers burn produces is in atmosphere.
The solid that pyrolytic reaction generates is carbon, and the charcoal temperature of just having discharged is higher, is about 250 ℃, directly contacts with air spontaneous combustion easily occurs.Discharging spiral conveyor is a kind of e Foerderanlage with indirect water-cooling.Charcoal is in the process of discharging, and heat is passed to the barrel of worm conveyor, and water coolant continues to flow outside barrel, the heat of barrel is taken out of, thus the temperature of reduction charcoal.From barrel, discharge with heat water coolant, by external blower fan, reduce the temperature of water coolant, on the barrel of pumped back transfer roller, realization recycles.
Above disclosed is only an embodiment of the present invention, certainly can not limit with this interest field of basis, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the claims in the present invention, still belong to the scope that the present invention is contained.
Claims (7)
1. a kitchen waste heat solution treatment process, is characterized in that, it comprises the steps:
(1) garden waste is carried out to preliminary fragmentation;
(2) kitchen waste is pressurizeed drainage;
(3) kitchen waste after step (1) and step (2) processing and garden waste are thrown in storage hole in proportion, employing instrument is uniformly mixed into waste mixture by kitchen waste and garden waste;
(4) waste mixture step (3) being generated is transported to pulverizer and carries out crushing operation, and waste mixture is further pulverized and mixed more even;
(5) the waste mixture after step (4) is pulverized is sent in reacting in rotary kiln stove, carries out pyrolysis, by pyrolysis respectively by waste mixture respectively pyrolysis be: water vapor, pyrolysis gas, carbon, tar and dust;
(6) first pyrolysis gas is carried out to washing operation, except tar removing and dust, then adopt the separator that anhydrates to isolate the water vapor mixing with pyrolysis gas, and obtain the clean pyrolysis gas that can directly burn;
(7) clean pyrolysis gas step (6) being obtained is as fuel combustion, directly for reacting in rotary kiln stove pyrolysis plant provides thermal source;
(8) by pyrogenous origin pyrocarbon, first pass through cooling process, then discharge, complete more than kitchen and the processing of garden waste mixed pyrolysis.
2. kitchen according to claim 1 waste heat solution treatment process, it is characterized in that described kitchen waste and garden waste throw in proportion into ratio be mass ratio, kitchen waste is 2:1 than garden waste.
3. kitchen according to claim 2 waste heat solution treatment process, is characterized in that described being tentatively broken for: garden waste is carried out to shearing fragmentation, the size≤30mm after fragmentation.
4. the remaining and garden waste mixed pyrolysis treatment process in kitchen according to claim 3, is characterized in that described crushing operation, by waste mixture by beater grinder, the size≤10mm of the waste mixture after pulverizing.
5. kitchen according to claim 4 waste heat solution treatment process, is characterized in that kitchen waste and garden waste storage time≤48 hour in storage hole.
6. kitchen according to claim 5 waste heat solution treatment process, is characterized in that a side in described storage hole to be provided with draining net, and further drop is except the superfluous water in kitchen waste.
7. kitchen according to claim 6 waste heat solution treatment process, is characterized in that described washing operation completes by condensing washing tower, by the collision type separator that anhydrates, is completed and is isolated the water vapor mixing with pyrolysis gas.
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| CN104910931A (en) * | 2015-06-09 | 2015-09-16 | 湖州宜可欧环保科技有限公司 | Cultivation farm solid waste continuous pyrolysis carbonization treatment method and device |
| CN106800942A (en) * | 2017-03-31 | 2017-06-06 | 山西易通环能科技集团有限公司 | A kind of worn-out agricultural film process in plastics technique |
| CN107033973A (en) * | 2017-05-26 | 2017-08-11 | 中国林业科学研究院林产化学工业研究所 | A kind of inside and outside hot integral biomass revolution pyrolytic gasification equipment and application |
| CN108913173A (en) * | 2018-09-11 | 2018-11-30 | 广东天源环境科技有限公司 | A kind of method and system that pyrolysis gas and oil recycles |
| CN110639931A (en) * | 2019-09-23 | 2020-01-03 | 四川雷鸣环保装备有限公司 | Process for coupling kitchen waste and biomass to coproduce oil, electricity, steam and carbon |
| CN114405467A (en) * | 2022-01-24 | 2022-04-29 | 博仕燊环保科技(广州)有限公司 | Biochar prepared from kitchen waste and garden waste and preparation method thereof |
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| CN104861998A (en) * | 2015-06-09 | 2015-08-26 | 湖州宜可欧环保科技有限公司 | Biomass continuous pyrolysis carbonization treatment method and device |
| CN104910931A (en) * | 2015-06-09 | 2015-09-16 | 湖州宜可欧环保科技有限公司 | Cultivation farm solid waste continuous pyrolysis carbonization treatment method and device |
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| CN110639931A (en) * | 2019-09-23 | 2020-01-03 | 四川雷鸣环保装备有限公司 | Process for coupling kitchen waste and biomass to coproduce oil, electricity, steam and carbon |
| CN114405467A (en) * | 2022-01-24 | 2022-04-29 | 博仕燊环保科技(广州)有限公司 | Biochar prepared from kitchen waste and garden waste and preparation method thereof |
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Application publication date: 20141203 |