CN109971503A - A kind of device and method of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil - Google Patents

A kind of device and method of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil Download PDF

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Publication number
CN109971503A
CN109971503A CN201910121417.6A CN201910121417A CN109971503A CN 109971503 A CN109971503 A CN 109971503A CN 201910121417 A CN201910121417 A CN 201910121417A CN 109971503 A CN109971503 A CN 109971503A
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China
Prior art keywords
pyrolysis
bio oil
hermetically sealed
zone
biogas residue
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Pending
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CN201910121417.6A
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Chinese (zh)
Inventor
戴晓虎
董李鹏
李磊
董滨
顾战北
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Tongji University
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Tongji University
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Priority to CN201910121417.6A priority Critical patent/CN109971503A/en
Publication of CN109971503A publication Critical patent/CN109971503A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C10G1/002—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal in combination with oil conversion- or refining processes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10—Feedstock materials
    • C10G2300/1003—Waste materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses the devices that a kind of urban mud anaerobic digestion biogas residue is pyrolyzed preparation bio oil, hermetically sealed can includes the pyrolysis zone set gradually from the bottom up, Pintsch process area and condensing zone, it is separately installed with primary heater, secondary heater and condenser on the side wall of the hermetically sealed can of pyrolysis zone, Pintsch process area and condensing zone, several first partitions for being alternately arranged setting and second partition are respectively equipped in condensing zone and Pintsch process area；Oil storage tank is connected by oil guide pipe with the lower part of condensing zone；Vacuum pump is connected by gas pipeline with the top of condensing zone, and the tail portion of vacuum pump is equipped with air accumulator.The present invention carries out second pyrolysis to municipal sludge pyrolysis oil by setting cracking zone, realizes bio oil in the efficient collection of condensing zone, provides green equipment technology for the processing disposition of municipal sludge.

Description

A kind of device and method of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil
Technical field
The present invention relates to Sewage Sludge Treatment Techniques fields, are related specifically to a kind of urban mud anaerobic digestion biogas residue pyrolysis Prepare the device of bio oil.
Background technique
With the popularization and application of Wastewater Treated by Activated Sludge Process sanitary sewage, excess sludge production is sharply increased, and sludge yield is Reached 43,000,000 tons/year (in terms of moisture content 80%), excess sludge processing disposition situation is increasingly serious.Therefore, to city dirt Mud carries out processing disposition and realizes that its high added value resource utilization has become an important scientific problems.Anaerobic sludge digestion As a kind of sludge disposal technology of great potential, the energy is recycled while reducing amount of sludge, is become at present in the world most Welcome sludge reduction and resource treatment technique.But organic matter and SiO in mud granule2Particle mixes, Organic matter can not effectively come into full contact with anaerobic digestion bacterium, cause organic matter that cannot be utilized methane phase.So anaerobic digestion Journey can only utilize a part of organic matter in sludge.Digestion biogas slurry obtains digestion biogas residue by dehydration, digests in biogas residue still also There is a large amount of organic matter not recycled.Simultaneously it can be noted that still there are also a large amount of organic matters for sludge biogas residue after digestion And heavy metal not only wastes large amount of biomass energy source if arbitrarily landfill buries or uses as biological carbon soil, can also make a huge sum of money Belong to and enters water and soil environment.Therefore, a large amount of waste sludge digestion biogas residue needs are effectively handled and resource utilization.Mesh Before, a kind of utilization device and method of sludge digestion biogas residue are needed, realize the high added value money of urban mud anaerobic digestion biogas residue Sourceization utilizes.
The prior art mainly carries out biogas residue, the solid-liquid separation treatment of biogas slurry to sludge-digestion liquid, then carries out from biogas slurry Recovery of nitrogen and phosphorus, the processing for less focusing on digestion biogas residue utilize.A kind of method of anaerobic sludge digestion biogas residue brickmaking of proprietary term (CN107056238A) in then postdigestive sludge biogas residue desiccation will be squeezed into adobe, and is fired into finished bricks after dry.But Be finished bricks added value it is lower, the ingredients such as heavy metal remain in finished bricks, cause potential hazard.
Therefore, sludge digestion biogas residue how is efficiently used, realizes its high added value resource utilization, is that current urgent need solves Major issue.
Summary of the invention
It is an object of the invention to aiming at the shortcomings in the prior art, provide a kind of urban mud anaerobic digestion biogas residue pyrolysis The device of bio oil is prepared, to solve the above problems.
Technical problem solved by the invention can be realized using following technical scheme:
A kind of device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil, including oil storage tank, air accumulator, vacuum pump And tower hermetically sealed can, the hermetically sealed can include the pyrolysis zone set gradually from the bottom up, Pintsch process area and condensing zone, heat Primary heater, secondary heater and cold are separately installed on the side wall of the hermetically sealed can of Xie Qu, Pintsch process area and condensing zone Several first partitions for being alternately arranged setting and second partition are respectively equipped in condenser, condensing zone and Pintsch process area；Oil storage tank Set on the side of hermetically sealed can, oil storage tank is connected by oil guide pipe with the lower part of condensing zone；The vacuum pump passes through gas pipeline It is connected with the top of condensing zone, the tail portion of vacuum pump is equipped with air accumulator.
Further, the temperature of the pyrolysis zone is maintained at 500 DEG C, and heating rate is 5~10 DEG C/min.
Further, the temperature in the Pintsch process area is maintained at 900 DEG C.
Further, the temperature of the condensing zone is to be maintained at 25 DEG C, and condenser is for carrying out cooling temperature control.
Further, the vacuum pump is used for the pyrolysis gas extraction in hermetically sealed can and ties up the vacuum degree in hermetically sealed can It holds 103Pa。
Further, the first partition is ceramic material, and several first partitions are successively staggered setting from top to bottom, Adjacent two pieces of first partition reversed dips setting, each piece of the high-end of first partition are individually fixed on the side wall of hermetically sealed can, the The low side of one partition is vacantly arranged.
Further, the low side of the first partition of one end alignment bottommost of the oil guide pipe；Pacify on the gas pipeline Equipped with vacuum meter, one end of gas pipeline is protruded into hermetically sealed can at the top of hermetically sealed can and is equipped with pipe plug on its inserting end.
Further, the second partition is made of the stainless steel plate of ceramics package, and several second partitions are from top to bottom Successively be staggered setting, and two pieces of adjacent second partitions are arranged in parallel, and the inner wall of hermetically sealed can is fixed in one end of second partition On, the other end of second partition is vacantly arranged.
A method of it preparing bio oil: sludge digestion biogas residue is put into the pyrolysis zone of hermetically sealed can, first starting vacuum Vacuum degree in hermetically sealed can is evacuated to 10 by pump3Pa, starts primary heater and secondary heater carries out heating pyrolysis, and bio oil is fast Speed volatilization obtains high-temperature biological oil gas body；Macromolecular substances in bio oil go successively to Pintsch process area, are further cleaved Become small-molecule substance；Small-molecule substance in bio oil goes successively to condensing zone and liquefies；The bio oil being collected into enters Oil storage tank, pyrolysis gas enter air accumulator by vacuum pump extraction.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) present apparatus carries out second pyrolysis to the larger molecular organics in bio oil by setting Pintsch process area, avoids Bio oil excessively sticky problem, greatly improves the utilizability of bio oil；
(2) a large amount of partitions are arranged in bio oil cracking zone and condensing zone in the present apparatus, greatly improve bio oil macromolecular The second pyrolysis effect of organic matter and the condensation collecting effect of bio oil.
The present invention carries out second pyrolysis to municipal sludge pyrolysis oil by setting cracking zone, and vacuum environment can reduce reaction Required temperature, and realize bio oil in the efficient collection of condensing zone.The present invention has well solved existing municipal sludge pyrolysis system The problem of standby bio oil liquid is sticky, complicated component, improves the utilizability of bio oil；The present apparatus has occupied area small, easily In promote and apply the advantages of, for municipal sludge processing dispose green equipment technology is provided.
Detailed description of the invention
Fig. 1 is the structural representation of the device of urban mud anaerobic digestion biogas residue of the present invention pyrolysis preparation bio oil Figure.
Fig. 2 is the process signal of the method for urban mud anaerobic digestion biogas residue of the present invention pyrolysis preparation bio oil Figure.
Fig. 3 is thermogravimetric test analysis figure of the municipal sludge under different heating rates.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to Specific embodiment, the present invention is further explained.
Referring to Fig. 1 and Fig. 2, the dress of a kind of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil of the present invention It sets, including oil storage tank 1, air accumulator 16, vacuum pump 15 and tower hermetically sealed can.Material import and export is offered on hermetically sealed can.It is close Sealed cans include the pyrolysis zone 7, Pintsch process area 5 and condensing zone 3 set gradually from the bottom up.Pyrolysis zone 7,5 and of Pintsch process area Primary heater 8, secondary heater 6 and condenser 4 are separately installed on the side wall of the hermetically sealed can of condensing zone 3.3 He of condensing zone Several first partitions 11 for being alternately arranged setting and second partition 10 are respectively equipped in Pintsch process area 5.Oil storage tank 1 is set to sealing The side of tank, oil storage tank 1 are connected by oil guide pipe 2 with the lower part of condensing zone 3.Vacuum pump 15 passes through gas pipeline 13 and condensation The top in area 3 is connected, and the tail portion of vacuum pump 15 is equipped with air accumulator 16.
The temperature of pyrolysis zone 7 is maintained at 500 DEG C, and heating rate is 5~10 DEG C/min.
The temperature in Pintsch process area 5 is maintained at 900 DEG C.
The temperature of condensing zone 3 is to be maintained at 25 DEG C, and condenser 4 is for carrying out cooling temperature control.
Vacuum pump 15 is used to extract out the pyrolysis gas in hermetically sealed can and the vacuum degree in hermetically sealed can is maintained 103Pa, That is vacuum pump 15 makes that pyrolysis zone 7 in reactor tank, Pintsch process area 5, vacuum degree all maintains 10 in condensing zone 33Pa。
First partition 11 is ceramic material, and several first partitions 11 are successively staggered setting from top to bottom.Adjacent two The setting of 11 reversed dip of block first partition.The inner end of first partition tilts down setting.High-end point of each piece of first partition 11 It is not fixed on the side wall of hermetically sealed can, the low side of first partition 11 is vacantly arranged.
The bottom of condensing zone 3 is arranged in oil guide pipe 2.The low side of the first partition 11 of one end alignment bottommost of oil guide pipe 2. Vacuum meter 14 is installed, gas pipeline 13 is arranged in the top of condensing zone 3, and one end of gas pipeline 13 is from close on gas pipeline 13 It is protruded at the top of sealed cans in hermetically sealed can and pipe plug 12 is installed on its inserting end.
Second partition 10 is made of the stainless steel plate of ceramics package, horizontally arranged setting.Several second partitions 10 are from upper Successively be staggered setting down.Load has catalyst resistant to high temperature on the surface of second partition, carries out two to bio oil gas Secondary orientation cracking, obtains specific target product.Two pieces of adjacent second partitions 10 are arranged in parallel, and one end of second partition 10 is solid Due on the inner wall of hermetically sealed can, the other end of second partition 10 is vacantly arranged.
A method of it preparing bio oil: sludge digestion biogas residue 9 is put into the pyrolysis zone 7 of hermetically sealed can, starting first is true Vacuum degree in hermetically sealed can is evacuated to 10 by sky pump 153Pa, starts primary heater 8 and secondary heater 6 carries out heating pyrolysis, raw Volatilization obtains high-temperature biological oil gas body to object oil rapidly；Macromolecular substances in bio oil go successively to Pintsch process area 5, further It is cleaved and becomes small-molecule substance.Reaction time after the Pintsch process area arrival highest temperature is 20 minutes.In bio oil Small-molecule substance goes successively to condensing zone 3 and liquefies；The bio oil being collected into enters oil storage tank 1, and pyrolysis gas is by vacuum pump 15 extractions enter air accumulator 16.The residue being collected into is rich in metal oxide and carbon simple substance, can be by resource utilization.
As shown in figure 3, can be seen that according to the thermogravimetric analysis figure of municipal sludge particle when temperature is increased to 500 DEG C, it is dirty Organic matter can be completely segregated in mud.Therefore, reaction temperature of the mud granule in pyrolysis zone should be maintained at 500 DEG C.Heating The difference of rate also can show visibly different shadow to the ratio of larger molecular organics in reaction required time and bio oil It rings.With the variation of heating rate, the time required for organic matter is completely segregated in sludge is different.Heating rate is got over Fastly, shorter the time required to reaction.But heating rate is faster, the larger molecular organics in product bio oil are also more, and liquid is viscous It is thick to utilize.Therefore, heating rate of the mud granule in pyrolysis zone is maintained at as 5~10 DEG C/min, and passes through setting two Secondary cracking process can reduce the generation of larger molecular organics in bio oil to the maximum extent, improve the utilizability of bio oil.
Sludge biogas slurry from anaerobic digestor come out after, be separated by solid-liquid separation (high level cadre's dehydration) first, obtain sludge-digestion liquid With sludge digestion biogas residue.Sludge-digestion liquid enters UASB processing, and sludge digestion biogas residue enters the vacuum pyrolysis area of the present apparatus.First Start vacuum pump and reactor tank is evacuated to 103Pa, starting heater are heated, and heating rate is heated in 5~10 DEG C/min 200 DEG C are dehydrated；Continue to increase temperature to 500 DEG C of progress high-temperature vacuum pyrolytic reactions, bio oil, which is volatilized rapidly, obtains high temperature Bio oil gas；Macromolecular substances in bio oil go successively to secondary high-temperature cracking zone, are further cleaved and become small molecule Substance；Small-molecule substance in bio oil goes successively to condensing zone and liquefies.High-temperature biological oil gas body is in itself volatilization Under the draft effect of vacuum pump, secondary high-temperature cracking zone and condensing zone can be sequentially entered.Collection obtains bio oil and enters storage Oil tank, pyrolysis gas enter air accumulator by vacuum pump extraction.It is also individually collected finally, obtaining pyrolysis residue, pyrolysis residue master If SiO2With the mixture of carbon simple substance, while be rich in metal oxide and carbon simple substance, can further resource utilization.
Objective for implementation of the invention is not solely restricted to the sludge biogas residue after municipal sludge particle and its anaerobic digestion, for The recycling treatment of other abandoned biomass (such as stalk, levant cotton exocarp) is equally applicable.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (9)

1. a kind of device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil, it is characterised in that: including oil storage tank, gas storage Tank, vacuum pump and tower hermetically sealed can, the hermetically sealed can include the pyrolysis zone set gradually from the bottom up, Pintsch process area and Condensing zone is separately installed with primary heater, the second heating on the side wall of the hermetically sealed can of pyrolysis zone, Pintsch process area and condensing zone Be respectively equipped in device and condenser, condensing zone and Pintsch process area several first partitions for being alternately arranged setting and second every Plate；Oil storage tank is set to the side of hermetically sealed can, and oil storage tank is connected by oil guide pipe with the lower part of condensing zone；The vacuum pump passes through Gas pipeline is connected with the top of condensing zone, and the tail portion of vacuum pump is equipped with air accumulator.
2. the device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil according to claim 1, it is characterised in that: The temperature of the pyrolysis zone is maintained at 500 DEG C, and heating rate is 5~10 DEG C/min.
3. the device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil according to claim 1, it is characterised in that: The temperature in the Pintsch process area is maintained at 900 DEG C.
4. the device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil according to claim 1, it is characterised in that: The temperature of the condensing zone is to be maintained at 25 DEG C, and condenser is for carrying out cooling temperature control.
5. the device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil according to claim 1, it is characterised in that: The vacuum pump is used to extract out the pyrolysis gas in hermetically sealed can and the vacuum degree in hermetically sealed can is maintained 103Pa。
6. the device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil according to claim 1, it is characterised in that: The first partition is ceramic material, and several first partitions are successively staggered setting from top to bottom, adjacent two piece first every The setting of plate reversed dip, each piece of the high-end of first partition are individually fixed on the side wall of hermetically sealed can, and the low side of first partition is hanging Setting.
7. the device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil according to claim 6, it is characterised in that: The low side of the first partition of one end alignment bottommost of the oil guide pipe；Vacuum meter, flue are installed on the gas pipeline The one end in road is protruded into hermetically sealed can at the top of hermetically sealed can and is equipped with pipe plug on its inserting end.
8. the device of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil according to claim 1, it is characterised in that: The second partition is made of the stainless steel plate of ceramics package, and several second partitions are successively staggered setting from top to bottom, Two pieces of adjacent second partitions are arranged in parallel, and one end of second partition is fixed on the inner wall of hermetically sealed can, second partition it is another The hanging setting in end.
9. a kind of system for the device for being pyrolyzed preparation bio oil using urban mud anaerobic digestion biogas residue as described in claim 1 The method of standby bio oil, it is characterised in that: sludge digestion biogas residue is put into the pyrolysis zone of hermetically sealed can, starting vacuum pump will first Vacuum degree in hermetically sealed can is evacuated to 103Pa, starts primary heater and secondary heater carries out heating pyrolysis, and bio oil is waved rapidly Hair obtains high-temperature biological oil gas body；Macromolecular substances in bio oil go successively to Pintsch process area, are further cleaved and become Small-molecule substance；Small-molecule substance in bio oil goes successively to condensing zone and liquefies；The bio oil being collected into enters oil storage Tank, pyrolysis gas enter air accumulator by vacuum pump extraction.
CN201910121417.6A 2019-02-19 2019-02-19 A kind of device and method of urban mud anaerobic digestion biogas residue pyrolysis preparation bio oil Pending CN109971503A (en)

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Publication number Priority date Publication date Assignee Title
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103923669A (en) * 2014-04-02 2014-07-16 上海交通大学 Integrated type vacuum pyrolysis recycling device for liquid crystal and polarizing films in waste liquid crystal panel
CN105820829A (en) * 2016-05-13 2016-08-03 合肥学院 Process and device for preparing biomass oil through blue-green algae catalytic pyrolysis method
CN206109314U (en) * 2016-09-30 2017-04-19 华南理工大学 Straw liquid fuel device is produced to plastic waste cracking
CN106404619A (en) * 2016-11-15 2017-02-15 重庆科技学院 Determining system for original granularity of sintering mixture
CN107983079A (en) * 2018-01-24 2018-05-04 成都纽扣互动科技有限公司 A kind of greasy dirt intelligently removes condensing tower

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