CN107903930A - A kind of sludge and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil - Google Patents
A kind of sludge and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil Download PDFInfo
- Publication number
- CN107903930A CN107903930A CN201711002989.XA CN201711002989A CN107903930A CN 107903930 A CN107903930 A CN 107903930A CN 201711002989 A CN201711002989 A CN 201711002989A CN 107903930 A CN107903930 A CN 107903930A
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- China
- Prior art keywords
- sludge
- microalgae
- pyrolysis
- synthesis gas
- bio oil
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Classifications
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- 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
- 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
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
Abstract
The present invention relates to a kind of sludge and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil, and the microalgae being respectively dried is crushed to 0.15 0.18mm powder with sludge and is sufficiently mixed for being pyrolyzed；Microalgae is 1 with sludge mixed proportion:0.5 2, pyrolysis temperature is 500 DEG C 700 DEG C；Nitrogen flow is set as 200SCCM；The gas that pyrolysis produces passes through condensing unit, and obtained liquid product is bio oil；Non-condensable gas is collected by collection airbag, obtains synthesis gas.The present invention is suitable for common fixed-bed pyrolysis type, does not have particular/special requirement to device, therefore be suitable for large-scale promotion application；Raw material used is microalgae and sludge, it is possible to achieve recycling, this method are more suitable for industrial applications, there is higher development prospect；The bio oil prepared using this method, is individually pyrolyzed compared to microalgae or sludge is individually pyrolyzed, its nitrogen content and oxygen content are reduced, and quality of bio-oil is improved；Synthesis gas prepared by this method, is individually pyrolyzed, calorific value is significantly improved compared to sludge.
Description
Technical field
The invention belongs to solid waste resource disposal and recycling field, and in particular to a kind of sludge is mixed with microalgae
Close the method that pyrolysis prepares synthesis gas and bio oil.
Background technology
In the past few decades, social fast development is largely dependent upon fossil energy, and which results in whole
The serious environmental problems that a world faces, such as the drastically reduction of resources reserve, caused by environmental pollution and greenhouse gas emission
Climate change etc., this facilitate everybody lifting to regenerative resource attention rate.
Microalgae, it is considered as the raw material of third generation bio-fuel.Compared with other biological matter type such as lignocellulosic,
Microalgae has many advantages, such as higher productivity, the photosynthetic efficiency of higher and the growth rate of higher.In addition, microalgae is given birth to
Arable soil is not required in length.In pyrolytic process, the synthesis gas of generation has higher thermal value, in terms of bio oil production, compared to
Wood type pyrolysis oil, the bio oil produced by microalgae have higher calorific value.But the bio oil that algae produces is rich in nitrogen, its is extensive
Using may cause in such as gasoline in the discharge of NOx.
On the other hand, as the improvement of people's living standards, sludge yield sharply increases in recent years.Included in sludge
Evil material, such as potentially pathogenic microorganism and heavy metal.The processing methods such as traditional landfill, anaerobic digestion cannot meet that environmental protection will
Ask.In addition, the high moisture content in sludge, which result in its drying process, consumes substantial amounts of thermal energy.Containing organic and inorganic in sludge
Component, receives significant attention its potentiality of thermal transition technology in terms of its energy regenerating.The pyrolysis of sludge can produce bio oil,
Non-condensable gas (synthesis gas) and charcoal.It is subject to extensively using since sludge content of ashes is high, pyrolysis oil calorific value is low etc.
Limitation.
The nitrogen and oxygen content of microalgae pyrolysis oil are high, then need to carry out catalytic hydrogenation treatment.The purpose of catalytic hydrogenation treatment
Hydrogen and catalyst are mainly used, by the way that oxygen and nitrogen are changed into water and NH3, therefrom except deoxidation and nitrogen.What pyrolyzing sludge produced
Synthesis gas (hydrogen rich gas) can improve the quality of bio oil, and industrial production is realized in promotion.
The shortcomings that mixed pyrolysis of microalgae and sludge can be to avoid in independent pyrolysis can simultaneously improve the performance of pyrolytic process.
Mixed pyrolysis can not only reduce the cost of raw material, but can also solve the waste management problems of sewage sludge.
The content of the invention
It is an object of the invention to invent a kind of sludge and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil, solution
The problem of certainly microalgae pyrolysis bio-oils nitrogen content is high, while solve the problems, such as that sludge energyization utilizes, microalgae and sludge source way
Footpath is extensive, and pyrolytic technique has tended to be ripe, is conducive to utilize on a large scale.
The technical scheme is that：
A kind of sludge and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil, comprise the following steps that：
(1) untreated sludge and microalgae raw material are respectively placed in baking oven, the dry 12- under the conditions of 100 DEG C -105 DEG C
24h；Dried sludge and microalgae are crushed, filter out the powder that particle diameter is 0.15-0.18mm；
(2) sludge and microalgae are sufficiently mixed as mixed pyrolysis raw material；
(3) pyrolysis fixed bed heating mode is opened, final temperature is arranged to 500-700 DEG C, and nitrogen flow is set as 200SCCM
To build oxygen-free environment；When furnace temperature reaches 500-700 DEG C of pyrolysis temperature, microalgae and sludge mixed-powder are added to pyrolysis
In stove；
(4) gas that pyrolysis produces passes through condensing unit, and obtained liquid product is bio oil；Non-condensable gas passes through
The collection of collection airbag is crossed, obtains synthesis gas.
Wherein, the microalgae described in step 1 is based on the high microalgaes of nitrogen content such as micro- plan ball algae, spirulina.
Wherein, microalgae and the mixing quality ratio of sludge are 1 in step 2:0.5-2.
Compared to the prior art the present invention, has obvious technical characterstic and beneficial effect.According to above technical scheme, sheet
Invention has the following advantages：
1st, the present invention is suitable for common fixed-bed pyrolysis type, does not have particular/special requirement to device, therefore suitable for big rule
Mould promotes and applies.
2nd, the raw material used in the present invention is microalgae and sludge, it is possible to achieve recycling, this method are more suitable for industry
Change application, there is higher development prospect.
3rd, bio oil prepared by this method, is individually pyrolyzed compared to microalgae or sludge is individually pyrolyzed, its nitrogen content and oxygen content
Reduce, quality of bio-oil is improved；Synthesis gas prepared by this method, is individually pyrolyzed, calorific value is significantly improved compared to sludge.
Brief description of the drawings
Fig. 1 is sludge of the present invention and the broad flow diagram of microalgae mixed pyrolysis technique；
The fixed-bed pyrolysis structure drawing of device that Fig. 2 is utilized for the present invention；
Wherein each several part is respectively：
1- nitrogen, 2- pressure reducing valves, 3- check valves, 4- mass flowmenters, 5- feed inlets, 6- pyrolysis ovens, 7- quartz sand beds,
8- asbestos, 9- condenser systems, 10 conical flasks, 11- synthesis gas collection devices.
Embodiment
Now illustrate the present invention with following embodiments, but be not limited to the scope of the present invention.The hand used in embodiment
Section, unless otherwise instructed, using this area conventional means.
Embodiment 1：
Micro- plan ball algae is crushed with sludge after drying first, filters out the powder of screening particle diameter 0.15-0.18.mm
End.The micro- Industrial Analysis for intending ball algae and elemental analysis are as shown in table 1：
The micro- Industrial Analysis and elemental analysis for intending ball algae of table 1
aCalculated by minusing, remaining measures dry base data for instrument.
The Industrial Analysis and elemental analysis of sludge are as shown in table 2：
The Industrial Analysis and elemental analysis of 2 sludge of table
aCalculated by minusing, remaining measures dry base data for instrument
The present embodiment employs the fixed-bed pyrolysis device shown in Fig. 2.It is 600 DEG C that pyrolysis temperature is set in this implementation, micro-
Intend ball algae and sludge mixing quality ratio 1:1, biased sample quality is 40g.Specific implementation step is as follows：
(1) start fixed-bed pyrolysis heating unit, heat up,；
(2) nitrogen gas cylinder is opened, nitrogen 1 enters pyrolysis oven after pressure reducing valve 2, check valve 3, mass flowmenter 4, adjusts
Nitrogen delivery rate ensures pyrolysis oven under an inert atmosphere to 200SCCM；
(3) when temperature rises to design temperature and keeps stablizing, micro- plan ball algae is passed through into dispenser with sludge mixed-powder
5 are added to enter into pyrolysis oven 6, quartz sand 7 is placed on asbestos 8 as a heat transfer medium, for fixing feed location；
(4) pyrolysis gas produced separates after condenser system 9, and bio oil can collect in conical flask 10, synthesis gas
It is collected in synthesis gas collection device 11.
Embodiment 2：
Device and raw material used in the present embodiment is with embodiment 1, and it will not go into details.
The present embodiment employs the fixed-bed pyrolysis device shown in Fig. 2.It is 550 DEG C that pyrolysis temperature is set in this implementation, micro-
Intend ball algae and sludge mixing quality ratio 1:2, biased sample quality is 40g.Specific implementation step is as follows：
(1) fixed-bed pyrolysis stove is opened to heat up；
(2) nitrogen gas cylinder is opened, adjusts nitrogen delivery rate to 200SCCM；
(3) treat that temperature rises to design temperature, micro- plan ball algae is added to pyrolysis dress with sludge mixed-powder by dispenser
In putting；
(4) pyrolysis gas produced separates after condensation, obtains bio oil；Non-condensable gas is received by collection airbag
Collection, obtains synthesis gas.
Embodiment 3：
Spirulina is crushed with sludge after drying first, filters out the powder of screening particle diameter 0.15-0.18.mm
End.Selected sludge is consistent with example 1,2, and it will not go into details.
The Industrial Analysis and elemental analysis of spirulina are as shown in table 3：
The Industrial Analysis and elemental analysis of 3 spirulina of table
aCalculated by minusing, remaining measures dry base data for instrument.
The present embodiment employs the fixed-bed pyrolysis device shown in Fig. 2.It is 500 DEG C that pyrolysis temperature is set in this implementation, spiral shell
Revolve algae and sludge mixing quality ratio 1:0.5, biased sample quality is 40g.Specific implementation step is as follows：
(1) fixed-bed pyrolysis stove is opened to heat up；
(2) nitrogen gas cylinder is opened, adjusts nitrogen delivery rate to 200SCCM；
(3) treat that temperature rises to design temperature, spirulina and sludge mixed-powder are added to pyrolysis installation by dispenser
In；
(4) pyrolysis gas produced separates after condensation, obtains bio oil；Non-condensable gas is received by collection airbag
Collection, obtains synthesis gas.
Embodiment 4：
Device and raw material used in the present embodiment is with embodiment 3, and it will not go into details.
The present embodiment employs the fixed-bed pyrolysis device shown in Fig. 2.It is 700 DEG C that pyrolysis temperature is set in this implementation, spiral shell
Revolve algae and sludge mixing quality ratio 1:2, biased sample quality is 40g.Specific implementation step is as follows：
(1) fixed-bed pyrolysis stove is opened to heat up；
(2) nitrogen gas cylinder is opened, adjusts nitrogen delivery rate to 200SCCM；
(3) treat that temperature rises to design temperature, spirulina and sludge mixed-powder are added to pyrolysis installation by dispenser
In；
(4) pyrolysis gas produced separates after condensation, obtains bio oil；Non-condensable gas is received by collection airbag
Collection, obtains synthesis gas.
Product distribution and synthesis gas, bio oil feature such as following table of the sludge with microalgae pyrolysis：
A kind of sludge that the present invention is disclosed and proposed and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil, ability
Field technique personnel can be by using for reference present disclosure, and the appropriate links such as pyrolytical condition that change are realized.Although the method and system of the present invention
Standby technology is described by preferred embodiment, and related technical personnel can substantially not depart from present invention, spirit
Methods and techniques described herein route is modified or reconfigured with scope, to realize final technology of preparing.It is special
Not it is pointed out that all similar replacements and apparent to those skilled in the art, the Ta Mendou of change
It is deemed to be included in spiritual, scope and content of the invention.
Claims (3)
1. a kind of sludge and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil, it is characterized in that including the following steps：
(1) untreated sludge and microalgae raw material are respectively placed in baking oven, the dry 12-24h under the conditions of 100 DEG C -105 DEG C；
Dried sludge and microalgae are crushed, filter out the powder that particle diameter is 0.15-0.18mm；
(2) sludge and microalgae are sufficiently mixed as mixed pyrolysis raw material；
(3) pyrolysis fixed bed heating mode is opened, final temperature is arranged to 500-700 DEG C, and nitrogen flow is set as 200SCCM；Treat stove
When temperature reaches 500-700 DEG C of pyrolysis temperature, microalgae and sludge mixed-powder are added in pyrolysis oven；
(4) gas that pyrolysis produces passes through condensing unit, and obtained liquid product is bio oil；Non-condensable gas is by collection
Airbag is collected, and obtains synthesis gas.
2. the method as described in claim 1, it is characterized in that the step 1) microalgae is high with micro- plan ball algae or spirulina nitrogen content
Microalgae based on.
3. the method as described in claim 1, it is characterized in that microalgae and the mixing quality ratio of sludge are 1 in the step 2):
0.5-2。
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| CN201711002989.XA CN107903930A (en) | 2017-10-24 | 2017-10-24 | A kind of sludge and microalgae mixed pyrolysis producing synthesis gas and the method for bio oil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108587669A (en) * | 2018-05-18 | 2018-09-28 | 武汉理工大学 | A kind of shale gas oil-based drill cuttings resource utilization method |
Citations (3)
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|---|---|---|---|---|
| CN102108302A (en) * | 2011-01-30 | 2011-06-29 | 福州索源智能装备技术开发有限公司 | Method for preparing biological oil by quickly cracking aquatic plant |
| CN105419848A (en) * | 2015-11-18 | 2016-03-23 | 江苏大学 | Method for preparing bio-oil through co-pyrolysis catalytic hydrogenation by means of algae and waste rubber |
| CN107117787A (en) * | 2017-07-07 | 2017-09-01 | 中国石油大学(华东) | A kind of process of oily sludge addition microalgae biomass collaboration pyrolysis |
-
2017
- 2017-10-24 CN CN201711002989.XA patent/CN107903930A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108302A (en) * | 2011-01-30 | 2011-06-29 | 福州索源智能装备技术开发有限公司 | Method for preparing biological oil by quickly cracking aquatic plant |
| CN105419848A (en) * | 2015-11-18 | 2016-03-23 | 江苏大学 | Method for preparing bio-oil through co-pyrolysis catalytic hydrogenation by means of algae and waste rubber |
| CN107117787A (en) * | 2017-07-07 | 2017-09-01 | 中国石油大学(华东) | A kind of process of oily sludge addition microalgae biomass collaboration pyrolysis |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108587669A (en) * | 2018-05-18 | 2018-09-28 | 武汉理工大学 | A kind of shale gas oil-based drill cuttings resource utilization method |
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