CN102585860A - Method performing microwave pyrolysis on garbage - Google Patents
Method performing microwave pyrolysis on garbage Download PDFInfo
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Abstract
The invention discloses a method for performing microwave pyrolysis on garbage. The method comprises the following steps of: 1) pretreating the garbage to obtain structured garbage which is suitable for microwave pyrolysis; 2) performing microwave pyrolysis on the garbage, namely introducing pyrolysis gas out of a pyrolysis gas outlet of a microwave pyrolysis device, continuously outputting pyrolysis solid products from a pyrolysis solid residue discharge port on the microwave pyrolysis device, sealing the rest parts of the microwave pyrolysis device except a garbage inlet, the pyrolysis solid residue discharge port and a pyrolysis gas outlet to prevent the pyrolysis gas from being leaked and preventing external air from entering the microwave pyrolysis device to ensure that the pyrolysis gas is used as protective gas for pyrolysis reaction; and 3) recovering pyrolysis products, namely treating according to the pyrolysis products. The method has the characteristics of rapidness and high efficiency, low energy consumption, low cost, high resource utilization rate, simplicity in operation, high garbage volume reduction rate, capacity of obviously reducing damage of garbage to environment and the like; and by the method, innocent treatment of the garbage can be realized really.
Description
Technical field
The present invention relates to technology of garbage disposal, refer to that specifically a kind of to make rubbish high-temperature cracking based on microwave heating be the treatment technology of gas, liquid, solid residue, belong to the technical field of refuse treatment and recycling.
Background technology
Along with the level of urbanization is increasingly high, garbage treatment has become global problem.The mode of existing treating refuse mainly contains three kinds of landfill method, burning method and composting processes.Landfill method: sharpest edges are that processing cost is relatively low, and because of contaminate environment, take a large amount of land resourcess, practical value reduces gradually; Composting process: processing cost is low, but composting process is difficult to control, and is bigger to the secondary pollution risk in bad border; Incomplete to organic utilization, factor such as the fertilizer composition is complicated, and minimizing is less will progressively be eliminated; Burning method: have the main flow that many distinct advantages progressively become the domestic waste harmless treatment; Mainly show: 1) rubbish is after burning disposal; Pathogenic agent in the rubbish is utterly destroyed, and obnoxious flavour that produces in the combustion processes and flue dust reach emission request after treatment; 2) but rubbish loss of weight 80% after burning subtract and hold more than 90%, decrement is effective, practices thrift a large amount of soils; 3) tail gas, heat energy can fully reclaim and utilize.But the consumer waste incineration technology is in development and conceptual phase, and the technology maturation degree is relatively low, and the equipment last effect is poor; Move average rubbish electric energy heat recovery rate 5%～8%; Be up to 10%, the volume reduction rate of rubbish is 60%～80%, and each item index does not reach design requirements for a long time.
But the defective of burning method also highlights day by day at present, and is not up to standard for a long time like the dioxin quantity discharged; Combustible content in the slag >=5%, the hot burn decrement rate of slag >=3% is limited by refuse moisture and calorific value, adds a large amount of combustion-supporting material coal or heavy oil for a long time, and addition significantly improves the operation processing cost up to 30%～60%; Drift and heavy metal high oxide content are higher in the tail gas, for a long time can not qualified discharge; Investment is big, and the recovery of the capital cycle is long, even 90～120 yuan/ton of government subsidy expenses still are in the loss operation, have hindered whole technique and has developed and apply.
In a word, China's technology of garbage disposal also rests on the stage of landfill, compost treatment and burning under " carbon is dissolved " pattern, has the defective that floor space is big, environmental pollution serious, the resource recycling rate is low.Therefore, only greatly develop garbage treatment and resource technology under " carbon fixation " pattern, could effectively solve the treatment of urban garbage problem, realize that domestic waste is innoxious completely.
Though introduced some external treatment processs in recent years, and be not suitable for the rubbish characteristics of China's " high humidity, highboy excess ".Therefore, press for the treatment process of innoxious, the resource utilization of exploitation a kind of suitable China municipal wastes characteristics.
Summary of the invention
Above-mentioned deficiency to the prior art existence; The purpose of this invention is to provide a kind of garbage microwave pyrolysis treatment process; This technology has rapidly and efficiently, less energy consumption, cost is low, resource utilization is high, simple to operate, rubbish volume reduction rate high, can significantly reduce rubbish to the characteristics such as harm that environment caused, and really realizes rubbish processing to be harmless.
Technical scheme of the present invention is achieved in that the garbage microwave pyrolysis treatment process, and its treating processes is:
1) rubbish pre-treatment--earlier the solid raw refuse is carried out sorting; Only stay organism; Surplus and the residue in kitchen obtains organism through fermentation, and above-mentioned organism obtains the structurizing rubbish of the suitable microwave cracking of moisture content≤13%, granularity≤100mm through dehydration and pulverization process;
2) garbage microwave pyrolysis--with the 1st) the structurizing rubbish that obtains of step pre-treatment sends in the microwave cracking device through garbage inlet continuously; Under the microwave exposure of frequency 2450 ± 50MHz, single source power 1～100KW; Structurizing rubbish is warming up to 350～650 ℃ and carries out cracking, and controlled microwave cracker internal pressure is not more than 1.6Mpa; In the cracking process, the splitting gas of generation is drawn from the splitting gas outlet of microwave cracking device; Pyrolysis solid product is exported through the pyrolysis solid resistates discharge port on the microwave cracking device continuously; Except garbage inlet, pyrolysis solid resistates discharge port and splitting gas outlet, all the other positions of microwave cracking device all carry out encapsulation process in case gas leakage is separated in crack arrest and stop extraneous air to get into, and make the shielding gas of splitting gas self as scission reaction;
The 2nd) preferably constantly stir in the step microwave exposure process so that structurizing rubbish uniform distribution in the microwave cracking device.
3) split product recycle-is handled respectively according to split product:
3-1) cracked gas product reclaims and utilizes
Splitting gas is drawn after the water spray cools off from the splitting gas outlet, and the liquid that condensation obtains (mainly being the liquid tar that cracking produces) gets into steam trap with spray water, incondensible splitting gas, isolates the gentle body portion of liquid portion; Gas part main body is an inflammable gas, be used for fuel gas generation or after further handling as industrial chemicals; Liquid portion is isolated tar and water through water-and-oil separator, after the water treatment as the spray water recycle; Tar obtains lower boiling oil fuel and industrial chemicals through distillation;
3-2) pyrolysis solid product reclaims and utilizes
The pyrolysis solid product staple is cracking charcoal and inanimate matter ash content, and the cracking charcoal is used to prepare gac, and the inanimate matter ash content is as filler or direct landfill disposal.
Further, bond easily during owing to the plastics fusion, and the ability of plastics absorption microwave is very low, lean on heat passage intensification, so preferably fiber material and the plastics parallel feeding of the used rubbish of microwave cracking.The so the 1st) comprise fiber material and plastics in the organism that step solid raw refuse sorting obtains, and the mass ratio of fiber material and plastics is 1: 0.8～1.2.
To discharging as water up to standard after waste water process pre-treatment successively, anaerobic treatment, aerobic treatment and three grades of advanced treatment of producing in rubbish pre-treatment and the microwave cracking process;
Pre-treatment:, make waste water ph remain on 6～9 through the adding of acid & alkali liquid; With air-floating apparatus the oil content in the waste water is removed 60 ± 2 ℃ of control air supporting temperature, air supporting time 10 ± 0.5min again; Powered-down, sedimentation 1 ± 0.1h; The waste water that to remove oil content at last feeds the sedimentation filtering basin, adds the flocculation agent sedimentation by the standard of every cube of waste water 6.5 ± 0.2Kg and filters; 75 ± 2 ℃ of control coagulating temperature, reaction times 30 ± 2min;
Anaerobic treatment: waste water after the pre-treatment is fed anaerobic fluidized bed, anaerobic fluidized bed carrier adopt granulated active carbon; The operating parameter of anaerobic fluidized bed reactor is: 30 ± 2 ℃ of treatment temps, pH value 6.8 ± 0.2, hydraulic detention time 8 ± 0.5h, reflux ratio 1:6～7, bed expansion rate 36 ± 2%, organic volumetric loading 24.3 ± 0.5 KgCOD
Cr/ (m
3D);
Aerobic treatment: the equipment of aerobic treatment is the sbr reactor device, sbr reactor device processing condition: water inlet 2.0 ± 0.2h, aeration 12.0 ± 0.5h, idle 6.0 ± 0.2h; ST, water discharge time are respectively 1 ± 0.2h and 0.5 ± 0.1h, system's run duration, and concentration of activated sludge is about 4.5 ± 0.3g/L in the reactor drum, and the SVI value is between 100～140mL/g.
Three grades of advanced treatment: three grades of advanced treatment adopt the charcoal absorption technology, and activated carbon particle size is 0.2～0.6mm, and carrier is than being 1:10～12.
Said garbage inlet and splitting gas outlet are positioned at microwave cracking device upper end; Pyrolysis solid resistates discharge port is positioned at microwave cracking device lower end; Structurizing rubbish is sent in the microwave cracking device through spiral conveying mechanism at garbage inlet continuously; Carry from top to bottom then, accomplish microwave exposure at course of conveying.
But the present invention utilizes Pintsch process organic matter rubbish compositions such as the pretreated plastics of microwave heating, fiber, makes its cracking at high temperature, recycles respectively then.The present invention has the following advantages:
1. microwave cracking garbage raw material continuously feeding, the continuous discharging of split product, cracking process moves continuously, has improved production efficiency, is applicable to the mass-producing refuse treatment.Cracking treating processes aerogenesis is steady, does not have acutely and decomposes, and guarantees that industrializing implementation is continuous, stable, reliability service.
2. the microwave cracking process is carried out under hot environment, and splitting gas mainly is inflammable gass such as methane, ethane, and the splitting gas starvation to avoid danger such as burning, blast.The present invention as shielding gas, has overcome the shortcoming that needs nitrogen purging, protection when garbage microwave pyrolysis is handled with splitting gas self, has simplified microwave treatment technology; Can be under vacuum and positive pressure operation condition cracking rubbish, ensure cracking system safety; Nonnitrogenous gas in the splitting gas has improved combustable gas concentration in the splitting gas, helps recovery, purifying treatment and the recycling of splitting gas.
3. garbage microwave is handled and the recovery utilization rate height, and comprehensive reutilization rate and rubbish volume reduction rate >=96% are far above traditional trash processing way.
4. adopt the cooling of water spray, recovery, gas-liquid separator separates splitting gas and cracking product liquid, water-and-oil separator separating tar and water.The tar distillation that reclaims can obtain lower boiling oil fuel; The gas that acts as a fuel after splitting gas drying, the dedusting directly is used for the fuel gas generating; Pyrolysis solid product prepares Powdered Activated Carbon through multistage screening, pickling, floatation process, steam activation; Really realized the recycling of rubbish.
Embodiment
Garbage microwave pyrolysis treatment process of the present invention is specific as follows:
1) rubbish pre-treatment--earlier solid-state raw refuse is carried out sorting, remove metal, battery, glass, building inorganics etc., make it stay organism such as plastics, fiber; Surplus and the residue in kitchen obtains organism through fermentation, dehydration and pulverizing place.Organism moisture content≤13% after the processing, granularity≤100mm are as the rubbish material of microwave cracking processing;
Owing to bond easily during the plastics fusion, and the ability of plastics absorption microwave is very low, lean on heat passage intensification, thus preferably fiber material and the plastics parallel feeding of the used rubbish of microwave cracking, and the mass ratio of fiber material and plastics is 1: 0.8～1.2.
2) garbage microwave pyrolysis--with the 1st) the structurizing rubbish that obtains of step pre-treatment sends in the microwave cracking device through garbage inlet continuously; Under the microwave exposure of frequency 2450 ± 50MHz, single source power 1～100KW; Structurizing rubbish is warming up to 350～650 ℃ and carries out cracking, and controlled microwave cracker internal pressure is not more than 1.6Mpa; In the cracking process, the splitting gas of generation is drawn from the splitting gas outlet of microwave cracking device; Pyrolysis solid product is exported through the pyrolysis solid resistates discharge port on the microwave cracking device continuously; Except garbage inlet, pyrolysis solid resistates discharge port and splitting gas outlet, all the other positions of microwave cracking device all carry out encapsulation process in case gas leakage is separated in crack arrest and stop extraneous air to get into, and make the shielding gas of splitting gas self as scission reaction; Microwave cracking device outer cylinder body adopts metallic substance, and sealing can be born vacuum and high pressure to avoid microwave and splitting gas to leak also.
The 2nd) preferably constantly stir in the step microwave exposure process so that structurizing rubbish uniform distribution in the microwave cracking device.
The microwave cracking device is a vertical structure; Said garbage inlet and splitting gas outlet are positioned at microwave cracking device upper end; Pyrolysis solid resistates discharge port is positioned at microwave cracking device lower end; Structurizing rubbish is sent in the microwave cracking device through helical feed (feeding) mechanism at garbage inlet continuously, carries from top to bottom through whisking appliance then, accomplishes microwave exposure at course of conveying.Prolong the rubbish residence time when stirring, make rubbish obtain sufficient irradiation.Pyrolysis solid resistates discharge port also is provided with the spiral discharging mechanism identical with opening for feed, and spiral discharging mechanism is the screw shaft by driven by motor, and screw shaft is constantly exported rubbish in the process of rotation, has realized continuous feeding and discharging.
3) split product recycling-split product is presented as gaseous product and solid product at first, handles respectively according to different split products:
3-1) cracked gas product reclaims and utilizes
Splitting gas is drawn after the water spray cools off from the splitting gas outlet, and the liquid that condensation obtains (mainly being the liquid tar that cracking produces) gets into steam trap with spray water, incondensible splitting gas, isolates the gentle body portion of liquid portion; Gas part main body is an inflammable gas, be used for fuel gas generation or after further handling as industrial chemicals; Liquid portion is isolated tar and water through water-and-oil separator, after the water treatment as the spray water recycle; Tar obtains lower boiling oil fuel and industrial chemicals through distillation.
3-2) pyrolysis solid product reclaims and utilizes
The pyrolysis solid product staple is cracking charcoal and inanimate matter ash content, and the cracking charcoal is used to prepare gac, and the inanimate matter ash content is as filler or direct landfill disposal.
The cracking charcoal prepares process of active carbon:
3-2-1) at first the solid product after the cracking is rolled (can on travelling belt, install many group rubber rollers during industriallization additional) with rubber rollers, can powdered carbon group be crushed with rubber rollers, and the materials such as sandstone grain or glass slag of can not crushing are beneficial to next step screening;
3-2-2) press the material after grinding to screen with the multi-stage mechanical reciprocating sieve, the screen underflow that filters out is waited until the back and is used.Parameter to every batch of different garbage raw material and pyrolyzer is different, and the globule size that screens also can be different.Specifically confirm according to scene handicraft product situation in earlier stage.The screen underflow carbon containing that filters out is higher to be called former charcoal material.Screen overflow is generally and contains the more material of silico-calcium.Screen overflow can be done the building filler.
3-2-3) dry or the airing dehydration after the lotion oil removing of former charcoal material with ability degreasings such as a little liquid detergents, with repeatedly electric separation separation of Separators and High Tension Separation, separate the charcoal material part that obtaining the further raising of purity, at last to get into next step flotation.Electric separation parameter: voltage 60kv ~ 100kv, gas flow 0.4 ~ 0.5m
3/ s, pole plate is apart from 35 ~ 40mm.Isolated non-charcoal material part granularity is more even, can do the building filler.
3-2-4) electric separation is separated the charcoal material that obtains and partly carry out the charcoal material that flotation obtains the further raising of purity;
Flotation uses collecting agent to be kerosene or diesel oil, and whipping agent is secondary octanol.The consumption of kerosene or diesel oil is 0.7～1 kg/ton charcoal material part, and secondary octanol consumption is 0.04～0.08 a kilogram/charcoal material part per ton, flotation machine blade rotational speed 1000～2000r/min.Each flotation all with still floating be standard.The flotation branch is roughly selected and selected two steps, in water, suspends, adds secondary octanol whipping agent by the condition of roughly selecting and carry out primary cleaning roughly selecting the foam that obtains, and can also add a little sodium hydroxide according to the content of silicon in the former charcoal material and do flocculation usefulness, is used for precipitating silicon-containing compound.Selected result finds that the solution bottom has the cotton-shaped settling of tangible pearl, detects through XRD and is mainly the silicates material.Above correlation parameter can be made suitable change according to the material characteristic of different batches.Lower floor's material after the flotation can be done high-grade building auxiliary material.
The charcoal material that 3-2-5) flotation is obtained carries out strong acid picklings such as hydrochloric acid and (the charcoal material is done the ash content experiment; Hydrochloric acid is concentrated hydrochloric acid; Mass ratio in ash content in concentrated hydrochloric acid and the charcoal material is the ratio immersion charcoal material of 3:10); The purpose of pickling is the calcareous type of impurity of removing in the charcoal material that flotation obtains, and strong acid repeatedly circulation immersion uses back acidity to descend, and defends washing lotion with making low-grade lavatory after the acid dilution again.(sodium hydroxide and charcoal material mass ratio are 2:1～3:1 for soak with sodium hydroxide lye neutral back in material washing after the pickling; Water is diluted to and can soaks till all charcoal material then; At room temperature soaked 6 hours and fully stir so that in alkali and the charcoal material siliceous impurity fully contact); Again material is put at a distance from anoxybiotic stove reacting by heating 30 minutes under 400～500 ℃ temperature; So that the fully reaction down of siliceous class impurity in the charcoal material that flotation obtains and alkali high temperature can be carried out the effect of perforate activatory to the charcoal material simultaneously to a certain extent.With water-washing away the siliceous salts substances that reaction generates, obtain the charcoal material that purity further improves again; Carbon content generally can reach about 90%.
3-2-6) at last to the 5th) the charcoal material that obtains of step carries out activation, the most handy mechanical water vapor method of activation method.Because the front is through the microwave cracking charing, the back is passed through the high temperature alkaline purification again, and the charcoal material has certain perforate effect, so temperature does not need very highly during last steam activation, about about 600～700 ℃ get final product.The gac for preparing after the activation has certain adsorption effect, has suitable marketable value.
Successively through screening, electric separation, flotation and acid-alkali treatment, purpose is step by step the purity of charcoal material to be improved to former charcoal material in the present invention, and last carbon content generally can reach about 90%, thereby can prepare the gac with certain adsorption effect.
3-3) the cracking product liquid reclaims and utilizes
In rubbish pre-treatment (mainly referring to dehydration) and microwave cracking process, can produce a large amount of waste water; These waste water complicated components; Contain tens kinds of inorganic and organic cpds; And organism removes the heterogeneous ring compound contain monocycle and polycyclic aromatics and nitrogenous, sulphur, oxygen, need it be handled, and could discharge after making it up to standard.These waste water discharge as water up to standard after passing through pre-treatment, anaerobic treatment, aerobic (SBR method) processing and three grades of advanced treatment successively.Below be a concrete embodiment of processing.
3-3-1) preprocessing process:, make waste water ph remain on 6～9 through acid-base neutralisation; With air-floating apparatus the oil content in the waste water is removed 60 ℃ of control air supporting temperature, air supporting time 10min again; Powered-down, sedimentation 1h; The waste water that to remove oil content at last feeds the sedimentation filtering basin, adds the sedimentation of flocculant poly ferric sulfate by the standard of every cube of waste water 6.5Kg and filters; 75 ℃ of control coagulating temperature, reaction times 30min; Can effectively remove oil content in the waste water through pre-treatment, reduce part organic content in the waste water, improve the biodegradability of waste water, help back anaerobic-aerobic combined techniques two stage biological and handle;
3-3-2) anaerobic treatment is carried out through anaerobic fluidized bed: to the COD of microwave cracking garbage, waste-water
CrHigher characteristics at first use anaerobic fluidized bed (AFB) to carry out anaerobic treatment, and carrier adopts granulated active carbon (GAC).Waste water feeding after the pre-treatment is anaerobic fluidized bed, and the operating parameter of anaerobic fluidized bed reactor is: 30 ℃ of treatment temps, pH value 6.8, hydraulic detention time 8h, reflux ratio 1:6, bed expansion rate 36%, organic volumetric loading 24.3 KgCOD
Cr/ (m
3D).Through anaerobic treatment, most of inhibition organism at first is attracted on the GAC in the waste water, thereby has reduced the restraining effect to anaerobion.In this reactor drum, carrier and mikrobe keep contacting with each other, and anaerobion is fixed on the carrier, forms the active sludge with biofilm structure, can effectively reduce organic content in the waste water.
3-3-3) aerobic treatment: the equipment of aerobic treatment is sbr reactor device (sequencing batch reactor; Sequencing Batch Reactor); Its outstanding feature is to change the reaction times flexibly according to the degraded situation of substrate in the reactor drum; Thereby can control aerobic, anoxic and anaerobic envrionment conditions neatly, be a kind of dirty water living creature processing technique that causes at home and abroad that in recent years extensive attention and research increase day by day.Its removal mechanism of pollutants and conventional activated sludge process are in full accord, and just operation scheme is different.Sbr reactor device processing condition: water inlet 2.0h, aeration 12.0h, idle 6.0h; ST, water discharge time are respectively 1h and 0.5h, corresponding water outlet CODc
rBe 236mg/L, BOD
5Be 54mg/L, clearance reaches 82.6% and 89.7% respectively; System's run duration, concentration of activated sludge is about 4.5g/L in the reactor drum, and the SVI value is between 100～140mL/g, and no sludge bulking phenomenon takes place.
3-3-4) three grades of advanced treatment: in order to realize that handling waste water reaches the GB8978-1996 standard; After the aerobic treatment,, adopt the charcoal absorption technology at last through three grades of advanced treatment; Activated carbon particle size is 0.2～0.6mm, and carrier is than (gac: wastewater volume) be 1:10.Further remove two stage biological and handle the back residual organic matter, the water outlet COD value after can obtaining adsorbing is at 20～60mg/L, thereby effectively reduces chroma in waste water, can drop to below 40 times.
This garbage microwave pyrolysis treatment process has rapidly and efficiently, less energy consumption, cost is low, resource utilization is high, simple to operate, rubbish volume reduction rate high, can significantly reduce rubbish to the characteristics such as harm that environment caused, and really realizes rubbish processing to be harmless.
Claims (5)
1. a garbage microwave pyrolysis treatment process is characterized in that, present method treating processes is:
1) rubbish pre-treatment--earlier the solid raw refuse is carried out sorting; Only stay organism; Surplus and the residue in kitchen obtains organism through fermentation, and above-mentioned organism obtains the structurizing rubbish of the suitable microwave cracking of moisture content≤13%, granularity≤100mm through dehydration and pulverization process;
2) garbage microwave pyrolysis--with the 1st) the structurizing rubbish that obtains of step pre-treatment sends in the microwave cracking device through garbage inlet continuously; Under the microwave exposure of frequency 2450 ± 50MHz; Structurizing rubbish is warming up to 350～650 ℃ and carries out cracking, and controlled microwave cracker internal pressure is not more than 1.6Mpa; In the cracking process, the splitting gas of generation is drawn from the splitting gas outlet of microwave cracking device; Pyrolysis solid product is exported through the pyrolysis solid resistates discharge port on the microwave cracking device continuously; Except garbage inlet, pyrolysis solid resistates discharge port and splitting gas outlet, all the other positions of microwave cracking device all carry out encapsulation process in case gas leakage is separated in crack arrest and stop extraneous air to get into, and make the shielding gas of splitting gas self as scission reaction;
3) split product recycle-is handled respectively according to split product:
3-1) cracked gas product reclaims and utilizes
Splitting gas is drawn after the water spray cools off from the splitting gas outlet, and the liquid that condensation obtains gets into steam trap with spray water, incondensible splitting gas, isolates the gentle body portion of liquid portion; Gas part main body is an inflammable gas, be used for fuel gas generation or after further handling as industrial chemicals; Liquid portion is isolated tar and water through water-and-oil separator, after the water treatment as the spray water recycle; Tar obtains lower boiling oil fuel and industrial chemicals through distillation;
3-2) pyrolysis solid product reclaims and utilizes
The pyrolysis solid product staple is cracking charcoal and inanimate matter ash content, and the cracking charcoal is used to prepare gac, and the inanimate matter ash content uses as filler or direct landfill disposal.
2. garbage microwave pyrolysis treatment process according to claim 1 is characterized in that: comprise fiber material and plastics in the organism that the 1st) step solid raw refuse sorting obtains, the mass ratio of fiber material and plastics is 1: 0.8～1.2.
3. garbage microwave pyrolysis treatment process according to claim 1 and 2 is characterized in that: to discharging as water up to standard after waste water process pre-treatment successively, anaerobic treatment, aerobic treatment and three grades of advanced treatment of producing in rubbish pre-treatment and the microwave cracking process;
Pre-treatment:, make waste water ph remain on 6～9 through the adding of acid & alkali liquid; With air-floating apparatus the oil content in the waste water is removed 60 ± 2 ℃ of control air supporting temperature, air supporting time 10 ± 0.5min again; Powered-down, sedimentation 1 ± 0.1h; The waste water that to remove oil content at last feeds the sedimentation filtering basin, adds the flocculation agent sedimentation by the standard of every cube of waste water 6.5 ± 0.2Kg and filters; 75 ± 2 ℃ of control coagulating temperature, reaction times 30 ± 2min;
Anaerobic treatment: waste water after the pre-treatment is fed anaerobic fluidized bed, anaerobic fluidized bed carrier adopt granulated active carbon; The operating parameter of anaerobic fluidized bed reactor is: 30 ± 2 ℃ of treatment temps, pH value 6.8 ± 0.2, hydraulic detention time 8 ± 0.5h, reflux ratio 1:6～7, bed expansion rate 36 ± 2%, organic volumetric loading 24.3 ± 0.5 KgCOD
Cr/ (m
3D);
Aerobic treatment: the equipment of aerobic treatment is the sbr reactor device, sbr reactor device processing condition: water inlet 2.0 ± 0.2h, aeration 12.0 ± 0.5h, idle 6.0 ± 0.2h; ST, water discharge time are respectively 1 ± 0.2h and 0.5 ± 0.1h, system's run duration, and concentration of activated sludge is about 4.5 ± 0.3g/L in the reactor drum, and the SVI value is between 100～140mL/g;
Three grades of advanced treatment: three grades of advanced treatment adopt the charcoal absorption technology, and activated carbon particle size is 0.2～0.6mm, and carrier is than being 1:10～12.
4. garbage microwave pyrolysis treatment process according to claim 3; It is characterized in that: said garbage inlet and splitting gas outlet are positioned at microwave cracking device upper end; Pyrolysis solid resistates discharge port is positioned at microwave cracking device lower end; Structurizing rubbish is sent in the microwave cracking device through spiral conveying mechanism at garbage inlet continuously, carries from top to bottom then, accomplishes microwave exposure at course of conveying.
5. garbage microwave pyrolysis treatment process according to claim 4 is characterized in that: the 2nd) constantly stir so that structurizing rubbish uniform distribution in the microwave cracking device in the step microwave exposure process.
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| CN111263669B (en) * | 2018-10-03 | 2022-10-04 | 株式会社大木工艺 | Method and system for recycling waste |
| CN109433788A (en) * | 2018-10-29 | 2019-03-08 | 聂凤玲 | Clinical waste environment-friendly processing unit |
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| WO2020088172A1 (en) | 2018-10-29 | 2020-05-07 | 中国石油化工股份有限公司 | Continuous operation method for microwave high-temperature pyrolysis of solid material comprising organic matter |
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