CN100417708C - Method for preparing biodiesel from sludge by microwave radiation - Google Patents
Method for preparing biodiesel from sludge by microwave radiation Download PDFInfo
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- CN100417708C CN100417708C CNB2006102005109A CN200610200510A CN100417708C CN 100417708 C CN100417708 C CN 100417708C CN B2006102005109 A CNB2006102005109 A CN B2006102005109A CN 200610200510 A CN200610200510 A CN 200610200510A CN 100417708 C CN100417708 C CN 100417708C
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The present invention belongs to the technical field of the environmental science and relates to a method for processing solid waste sludge, particularly to a method for radiating sludge by microwaves for preparing biologic diesel oil. The present invention is characterized in that microwave energy is directly acted on sludge for causing the sludge to be fast pyrolyzed; obtained product oil components can be directly used as biologic diesel oil. The present invention has the advantage that the microwave pyrolyzing process has the technical characteristics of high speed, efficient energy saving, low cost, etc. The present invention perfectly solves the technological problems existing in the existing sludge pyrolyzing techniques and can cause sludge to be changed into resources, reduce the quantity of sludge and carried out sanitizing processing to sludge.
Description
Technical field
The invention belongs to technical field of environmental science, relate to the treatment process of solid waste mud, specially refer to the method for preparing biodiesel from sludge by microwave radiation.
Background technology
Mud is the solid precipitation material that produces in sewage treatment process, contains a large amount of moisture content, inorganic ash and organism volatile matter.Along with social economy and fast development of urbanization, China's municipal sewage treatment ability constantly strengthens, and the sludge quantity of generation sharply increases.If can not get appropriate disposal not only will take a large amount of soils, and will cause secondary pollution, become big public hazards that influence urban environmental hygiene environment.How science, properly treatment and disposal mud has become the essential key issue that solves of urban development.
The disposal of municipal sludge with utilize in the method, mainly at present adopt landfill, throw practicality methods such as sea, burning and compost.Yet the aggravation of the severization of environmental standard, the growing tension of land resources and energy scarcity situation makes traditional mud be subjected to serious challenge.The utilization Circular Economy Theory, according to " minimizing, utilize again, resource utilization " principle, exploitation recycling sludge treatment technology realizes that the resource utilization of municipal sludge is recycled, and is to handle optimal way of mud and approach.Utilize in the technology at recycling sludge, the pyrolyzing sludge technology is as existing sludge treatment technology, the substitute technology of particularly sludge incineration technology, fairly simple with its processing unit, energy recovery rate is high, running cost is low, to second environmental pollution little with and products thereof characteristics such as all can resource utilization utilize to receive much concern again as gas, oil, charcoal.Yet the product that traditional pyrolytic technique such as low temperature pyrogenation technology obtain oil is owing to nitrogen, oxygen level height, and viscosity is big, handles the oil fuel use that is difficult to as high-quality if do not do any post-treatment.And before pyrolysis, need mud is carried out drying and other treatment, increased energy expenditure and facility investment.Therefore, reduce the energy consumption of existing pyrolytic technique, improve the grade of product oil, and further reduce cost and working cost is that pyrolytic technique can access to popularize in an all-round way and uses the key issue that must solve.
Summary of the invention
Having the purpose of this invention is to provide a kind of is thermal source with the microwave, carries out pyrolyzing sludge and makes method of bio-diesel oil and operational path.
Technical scheme of the present invention comprises the steps:
(1) mud is predrying: utilize high-temperature gas that municipal sludge such as active sludge, digested sludge and municipal sludge or industrial sludge such as paint sludge, paper mill sludge and oily sludge are carried out warm air drying, remove the part moisture in the mud;
(2) in above-mentioned mud, add 1%～10% suction ripple medium such as charcoal or carborundum, and uniform mixing;
(3) mud that adds suction ripple medium is put into microwave reactor and carry out the microwave radiation pyrolytic reaction; Microwave frequency is: 2450MHz; Microwave irradiation power is: 1kw～100kW, and irradiation time is: 5～25min, temperature is controlled to be: 600～900 ℃;
(4) product of separating out after the microwave radiation obtains incoagulability inflammable gas and product liquid through condensation:
(5) product liquid obtains oil fuel after oily water separation, and can obtain biofuel through further processing treatment;
(6) the solid product cinder that obtains or be introduced in the roasting kiln and produce high-temperature gas with the incoagulability inflammable gas mixed firing that obtains and be used for the predrying of mud, or carry out the microwave radiation pyrolytic reaction in the predrying mud as the adding of suction ripple medium, or made carbon absorbent by further activation.
Effect of the present invention and benefit are:
The present invention directly acts on mud to microwave energy, makes it that fast pyrogenation take place, and the product oil ingredient that obtains gently can directly be used as biofuel.Therefore, technical characterstic such as that the present invention has is quick, energy-efficient, cost is low solves the existing existing technical barrier of pyrolyzing sludge technology preferably, can realize recycling sludge, minimizing, harmless treatment.
Description of drawings
Accompanying drawing is a processing technology routine synoptic diagram of the present invention.
Embodiment
Be described in detail the specific embodiment of the present invention and embodiment below in conjunction with technical scheme and accompanying drawing.
Embodiment 1:
With municipal sludge such as active sludge, digested sludge, industrial sludge such as paint sludge, paper mill sludge and oily sludge carry out predrying with hot blast respectively, add 2% charcoal, put into the microwave-heating reaction unit.Setting power is 2000W, at 600-700 ℃ of following radiation 22min.Obtain the gas, liquid, solid product respectively, their product yield is as shown in table 1.
The product of the different mud microwave-heatings of table 1. is formed and yield
Analyze after tested and draw: the pyrolysis oil product that municipal sludge obtains is mainly based on fatty compounds, and the pyrolysis oil product that industrial sludge obtains is mainly based on the aromatics of single ring architecture; Gaseous product is mainly with CO and H
2Be main.
Embodiment 2:
With municipal sludge such as active sludge, digested sludge, industrial sludge such as paint sludge, paper mill sludge and oily sludge carry out predrying with hot blast respectively, add 9% charcoal, put into the microwave-heating reaction unit.Setting power is 10kw, at 800-900 ℃ of following radiation 16min.Obtain the gas, liquid, solid product respectively, their product yield is as shown in table 2.The product of the different mud microwave-heatings of table 2. is formed and yield
Analyze after tested and draw: the pyrolysis oil product that municipal sludge obtains is mainly based on fatty compounds, and the pyrolysis oil product that industrial sludge obtains is mainly based on the aromatics of single ring architecture; Gaseous product is mainly with CO and H
2Be main, and contain certain hydrocarbon gas.
Embodiment 3:
With municipal sludge such as active sludge, digested sludge, industrial sludge such as paint sludge, paper mill sludge and oily sludge carry out predrying with hot blast respectively, add 6% carborundum, put into the microwave-heating reaction unit.Setting power is 90kw, at 600-700 ℃ of following radiation 7min.Obtain the gas, liquid, solid product respectively, their product yield is as shown in table 3.
The product of the different mud microwave-heatings of table 3. is formed and yield
Analyze after tested and draw: the pyrolysis oil product that municipal sludge obtains is mainly based on fatty compounds, and the pyrolysis oil product that industrial sludge obtains is mainly based on the aromatics of single ring architecture; Gaseous product is mainly with CO and H
2Be main.
Embodiment 4:
With municipal sludge such as active sludge, digested sludge, industrial sludge such as paint sludge, paper mill sludge and oily sludge carry out predrying with hot blast respectively, add 10% mud cinder, put into the microwave-heating reaction unit.Setting power is 50kw, at 700-800 ℃ of following radiation 12min.Obtain the gas, liquid, solid product respectively, their product yield is as shown in table 4.
The product of the different mud microwave-heatings of table 4. is formed and yield
Analyze after tested and draw: the pyrolysis oil product that municipal sludge obtains is mainly based on fatty compounds, and the pyrolysis oil product that industrial sludge obtains is mainly based on the aromatics of single ring architecture; Gaseous product is mainly with CO and H
2Be main.
Embodiment 5:
Activate in activation furnace with inflammable gas that obtains or dried humid gas and make carbon absorbent obtaining various mud cinders, their absorption property is as shown in table 5.
Table 5. is by the absorption property of making carbon absorbent with the mud cinder
Embodiment 6:
Various mud cinders burn in roasting kiln with the inflammable gas that obtains or separately the inflammable gas that obtains is fed the generation high-temperature gas that burns in the roasting kiln is used for the predrying of mud with obtaining, and its water content of dried mud is reduced to 40～60% by 80%.Dehydration rate is 30～50%.
Claims (7)
1. the method for a preparing biodiesel from sludge by microwave radiation is to be thermal source with the microwave, carries out pyrolyzing sludge and makes method of bio-diesel oil, and its feature may further comprise the steps:
(1) mud is predrying: utilize high-temperature gas that mud is carried out warm air drying, remove the part moisture in the mud;
(2) in above-mentioned mud, add 1%～10% suction ripple medium, and uniform mixing;
(3) mud that adds suction ripple medium is put into microwave reactor and carry out the microwave radiation pyrolytic reaction; Its pyrolytic reaction process conditions is that microwave frequency is: 2450MHz; Microwave irradiation power is: 1kw～100kW, and irradiation time is: 5～25min, temperature is controlled to be: 600～900 ℃;
(4) product of separating out after the microwave radiation obtains incoagulability inflammable gas and product liquid through condensation:
(5) product liquid obtains oil fuel after oily water separation, and can obtain biofuel through further processing treatment;
(6) the solid product cinder that obtains or be introduced in the roasting kiln and produce high-temperature gas with the incoagulability inflammable gas mixed firing that obtains and be used for the predrying of mud, or carry out the microwave radiation pyrolytic reaction in the predrying mud as the adding of suction ripple medium, or made carbon absorbent by further activation.
2. the method for a kind of preparing biodiesel from sludge by microwave radiation according to claim 1 is characterized in that mud is a kind of of active sludge, digested sludge, municipal sludge, paint sludge, paper mill sludge or oily sludge.
3. the method for a kind of preparing biodiesel from sludge by microwave radiation according to claim 1, it is characterized in that inhaling the ripple medium is a kind of of charcoal, carborundum, titanium oxide, ferric oxide or mud cinder, their add-on is 1～10 quality %.
4. the method for a kind of preparing biodiesel from sludge by microwave radiation according to claim 1 is characterized in that inhaling mode in the adding mud of ripple medium for before drying sludge or behind drying sludge.
5. the method for a kind of preparing biodiesel from sludge by microwave radiation according to claim 1, it is characterized in that the inflammable gas that obtains prepares carbon absorbent as activator direct activation solid phase prod cinder, or the gas firing generation high-temperature gas that acts as a fuel is used for dry wet mud.
6. the method for a kind of preparing biodiesel from sludge by microwave radiation according to claim 1, the solid product cinder that it is characterized in that obtaining is as the activated carbon absorbent that is prepared into of raw material, or acts as a fuel to burn with inflammable gas and produce high-temperature gas and be used for dry wet mud.
7. the method for a kind of preparing biodiesel from sludge by microwave radiation according to claim 1, the activator that it is characterized in that being used for activating solid product cinder are a kind of of the inflammable gas that obtains or dry back humid gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006102005109A CN100417708C (en) | 2006-06-02 | 2006-06-02 | Method for preparing biodiesel from sludge by microwave radiation |
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| CNB2006102005109A CN100417708C (en) | 2006-06-02 | 2006-06-02 | Method for preparing biodiesel from sludge by microwave radiation |
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| CN100417708C true CN100417708C (en) | 2008-09-10 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999677B (en) * | 2006-12-31 | 2011-06-08 | 安徽理工大学 | Process of preparing rich furol biological oil by biomass microwave catalytic pyrolysis |
| CN100999676B (en) * | 2006-12-31 | 2011-06-08 | 安徽理工大学 | Process of preparing rich acetone alcohol biological oil by biomass microwave catalytic pyrolysis |
| CN101307244B (en) * | 2008-06-27 | 2011-05-25 | 东南大学 | Oil-making method of double-bed interactive and circling type for pyrolyzing sludge |
| CN101759344B (en) * | 2010-01-22 | 2012-02-29 | 西安长庆科技工程有限责任公司 | Oil field oil sludge drying treatment combined device and oil sludge drying treatment technique |
| US8657999B2 (en) * | 2010-07-28 | 2014-02-25 | General Electric Company | Methods for preparing fuel compositions from renewable sources, and related systems |
| CN103896472B (en) * | 2014-04-23 | 2016-01-20 | 江苏康泰环保股份有限公司 | A kind of mud microwave cracking method of resource |
| CN105087036B (en) * | 2015-07-24 | 2017-07-11 | 南昌大学 | A kind of micro ware auxiliary catalysis fast pyrogenation sludge prepares bio oil and the method for soil conditioner |
| CN105414155A (en) * | 2015-12-28 | 2016-03-23 | 北京中石大能源技术服务有限公司 | Harmless treatment method and harmless treatment device for industrial petroleum wastes |
| CN111001366A (en) * | 2019-12-02 | 2020-04-14 | 天津大学 | Method for reducing concentration of polycyclic aromatic hydrocarbon in sludge hydrothermal liquefaction bio-oil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085193A (en) * | 1993-09-10 | 1994-04-13 | 石油大学(北京) | The method and apparatus of refiltered oil from oily sludge |
| US20050274065A1 (en) * | 2004-06-15 | 2005-12-15 | Carnegie Mellon University | Methods for producing biodiesel |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085193A (en) * | 1993-09-10 | 1994-04-13 | 石油大学(北京) | The method and apparatus of refiltered oil from oily sludge |
| US20050274065A1 (en) * | 2004-06-15 | 2005-12-15 | Carnegie Mellon University | Methods for producing biodiesel |
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