CN104877694B - Spiral pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis - Google Patents
Spiral pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis Download PDFInfo
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- CN104877694B CN104877694B CN201510289229.6A CN201510289229A CN104877694B CN 104877694 B CN104877694 B CN 104877694B CN 201510289229 A CN201510289229 A CN 201510289229A CN 104877694 B CN104877694 B CN 104877694B
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- conveying pipeline
- powder
- pyrolysis
- electromagnetic valve
- feeding screw
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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
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Abstract
The present invention relates to a kind of spiral pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis, belong to biomass pyrolytic technical field.This feeder, including feeding screw, tilts conveying pipeline, electromagnetic valve and nozzle etc..The discharging opening of feeding screw is passed through transit joint and is connected with upper strata horizontal feed conveyor pipe and inclination conveying pipeline, it is connected with lower floor's horizontal feed conveyor pipe and inclination conveying pipeline again, by nozzle, the gas in carrier gas bottle is sprayed into, adjust inlet amount and prevent the effect regurgitated, therefore make fill process controllable safety, improve the reliability of production process.The present invention can solve charging aperture and shift to an earlier date carbonization and blockage problem; disclosure satisfy that the technological requirement of biomass fast pyrogenation, shorten the production maintenance time of pyrolysis plant, improve pyrolysis oil productivity; effectively reduce maintenance cost, pyrolysis is produced with large-scale development and plays certain technology guarantee effect.
Description
Technical field
The present invention relates to a kind of spiral-pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis, belong to raw
Material pyrolysis technical field.
Background technology
Biomass energy occupies consequence in the new forms of energy being constantly taken seriously, and fast pyrolysis technology is at home
Increasingly it is taken seriously, be a kind of one of important technology of the conversion of biomass energy.
At present, fluidized bed pyrolysis technology is as one of the most potential pyrolytic technique, is applied to give birth to by wide
Produce pyrolysis oil and biomass carbon granule.During fluidized bed pyrolysis, need rationally to adopt conveying equipment, by biomass material
Grain (also known as powder) is transported in fluidized-bed reactor.For enabling powder fast pyrogenation or flashing speed oven, fluidisation in reactor
Area typically requires and is heated to 400-550 DEG C about so that reactor periphery heated wall need to maintain higher temperature.Either annular
Fluidized-bed reactor or fluidized-bed reactor are required for ensureing that powder can pass through reactor outer wall and be injected into into fluidisation
Region.There are some problems when entering high-temperature area by apparatus for feeding in powder, such as convey powder using spiral feed arrangement
Material, in spiral feed arrangement, powder enters high-temperature area and is easily heated blackening in advance, thus pyrolysis charring in advance, precipitation viscous
Property material be easily caused that carbonization powder is block to be condensed after shutting down cooling, easily make pipeline blockage, affect fluid effect, or even
Increase process fault power time.
Publication No. CN 202390371, invention entitled " a kind of spiral for biomass fluid bed fast pyrogenation enters
The Chinese patent of glassware " discloses a kind of biomass pyrolytic feeder that can be used to and quantitatively convey, however, practical operation for many years
Find, through auger type feeder also existing defects, the carbonization blackening in helical feed high-temperature region of larch granule, and in reactor
Interior charcoal particle packing is serious, there is block condensation charcoal.The asking of the fill process objective reality high-temperature area of biomass fast pyrogenation
Topic, biomass powder high temperature carbonization and agglomeration problems are the difficult problems compared with generally existing, have the powder of higher viscosity and moisture content
Material is easier be heated in pipeline generation carbonization, caking and clogging.
Additionally, being conveyed to powder using Pneumatic conveyer, dilute phase persistently conveys has air consumption greatly, increased energy
The loss in source.Using pulsed level border irrigation device, powder segmentation in conveying pipeline is formed stock column powder is conveyed,
Reduce air consumption to a certain extent, but there is stock column and formed irregularly stably, stock column spacing is subject to properties of powder and discharge pressure
Interference larger, pulse frequency was limited to by the high-temperature region powder time of staying.And for viscosity fine powder powder, even if in conveying
In pipe high-temperature region, short stay also can adhere to tube wall because being heated carbonization, increased air pressure needed for conveying, due to pulsed strength
The conveying air pressure of conveying is usually setting, easily causes insufficient pressure and makes powder bonding deterioration in pipe make pipeline blockage.Phase
Close contrast patent
Integrated artistic according to biomass pyrolysis device requires, and the feeder needs being applied to biomass pyrolytic have well
Continuous conveying performance, counter-jetting resistance performance, anti-pipeline high temperature carbonization plugging performance, and simple function feeder be difficult to meet will
Ask, the such as spiral feed arrangement exit powder rate of outflow is relatively low, be easily caused biomass close to reactor end in height
The lower carbonization reaction in advance of temperature effect, clearance-type pneumatic transmission feeding device off time is limited to by high-temperature region powder carbonization, easily
Lead to accumulation property carbonization blocking in pipeline.In view of powder, the distance passed through in fluidisation pyrolysis reactor is entered by high-temperature region
Generally not long (in 0-2m about), and need to improve solid-gas ratio to reduce gas and energy loss.
Content of the invention
The purpose of the present invention is to propose to a kind of spiral-pulsed the mixture of airstream and strength charging for mobile biomass pyrolysis
Device, to solve the problems, such as that there is high temperature easy carbonization accumulation in current biomass fill process causes blocking so as to be applied to distance
Stablize adjustable conveying and high temperature does not produce the feeder of carbonization blocking, efficiently solve fluid bed and quickly solve fill process high temperature
Charring problems.
Spiral-pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis proposed by the present invention, including speed governing
Motor, hopper, feeding screw, the first inclination conveying pipeline, the second inclination conveying pipeline, one-level electromagnetic valve, two-stage electromagnetic valve, one-level
Nozzle, secondary nozzle and carrier gas bottle；The output shaft of described buncher is connected with the rotary shaft of described feeding screw, institute
The bottom of the hopper stated is connected with the charging aperture of feeding screw, and the discharging opening of feeding screw is defeated with upper strata by transit joint
Expects pipe is connected, and one end of upper strata conveying pipeline is provided with first order jet nozzle, and first order jet nozzle passes through the first appendix and described carrier gas bottle phase
Connection, the first appendix is provided with pressure gauge and one-level electromagnetic valve, and the other end of upper strata conveying pipeline is by the first inclination conveying pipeline
It is connected with lower floor conveying pipeline, one end of lower floor's conveying pipeline is provided with secondary nozzle, secondary nozzle passes through the second appendix and carrier gas bottle
It is connected, the second appendix is provided with pressure gauge and two-stage electromagnetic valve, and the other end of lower floor's appendix is by the second inclination conveying pipeline
It is connected with reactor.
Spiral-pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis proposed by the present invention, its advantage is：
1st, the mixture of airstream and strength feeder of the present invention, flat spin feeding structure therein serves regulation inlet amount and prevents
The effect regurgitated, therefore makes fill process controllable safety, improves the reliability of production process.
2nd, the mixture of airstream and strength feeder of the present invention, the wherein first order jet nozzle of employing, under the control of one-level electromagnetic valve, can
Pulsed is sprayed, and makes the charging in conveying pipeline more smooth, with feeding screw cooperation, promotes to form the defeated of Pipe in Dense Phase Pneumatic stock column
Send；The secondary nozzle of wherein employing, under the control of two-stage electromagnetic valve, can accelerate to high-temperature area powder, keep high
Warm line clear, makes the flow velocity of conveying pipeline high-temperature area powder be guaranteed, it is to avoid first order jet nozzle powder break time is in height
The stop of warm area, reduces carrier gas discharge pressure and high-voltage energy consumption loss, it is to avoid when only one-level is sprayed, pipeline is once blocking, required
First order jet nozzle insufficient pressure, leads to high energy consumption, or even the problem that cannot convey, and solves only one-level injection and cannot ensure localized hyperthermia
The problem of area's carbonization particle packing blocking pipeline, makes the flow velocity of conveying pipeline high-temperature area powder be guaranteed, it is to avoid one-level is sprayed
The stop in high-temperature region for mouth powder break time.When first order jet nozzle stops, giving the time that material enters delivery pipe, simultaneously two
Level nozzle spray regime is so that the high-temperature region being led to by one-level impulse jet smoothly enters in the material of pipeline bottom short stay
Reactor；Thus reducing first order jet nozzle energy consumption it is ensured that overall convey continually and steadily, by speed-raising and secondary gas injection cleaning pipe
Road avoids high temperature carbonization and blockage problem.
3rd, the mixture of airstream and strength feeder of the present invention, the present invention can solve charging aperture and shift to an earlier date carbonization and blockage problem, can
Meet the technological requirement of biomass fast pyrogenation.The feeder of the present invention, by two-stage type injection structure it is ensured that high-temperature area
In pipe, material does not stop, and is relatively prevented effectively from the blocking leading to due to high temperature and the charring problems of production process；Can realize
Inlet amount is stable so that pyrolytic reaction raw material supply is abundant, and continually and steadily runs；Greatly avoid hesitation dredging pipeline and
The situation lacking material no-load running in reactor occurs, and improves hot operation stability, reduces production maintenance expense；Keep away
Exempt from high temperature and high pressure gas in reactor and regurgitate entrance feeding pipe, lead to powder cannot convey or inlet amount fluctuation, have a strong impact on
Pyrolysis effect and pyrolysis yield；Run under pyrolytic conditions it is ensured that pyrolysis feed (powder) supply stably continues adjustable, shortening heat
Solution equipment produces maintenance time, improves pyrolysis oil productivity, effectively reduces maintenance cost, produces large-scale to pyrolysis and develops
To certain technology guarantee effect.
Brief description
Fig. 1 is the knot of the spiral-pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis proposed by the present invention
Structure schematic diagram.
In Fig. 1,1 is hopper, and 2 is feeding screw, and 3 is transit joint, and 4 is the first inclination conveying pipeline, and 5 is the second inclination
Conveying pipeline, 6 is reactor, and 7 is secondary nozzle, and 8 is pressure gauge, and 9 is two-stage electromagnetic valve, and 10 is first order jet nozzle, and 11 is one-level electricity
Magnet valve, 12 is carrier gas bottle, and 13 is buncher, and 14 is upper strata conveying pipeline, and 15 is lower floor's conveying pipeline, and 16 is the first appendix, 17
It is the second appendix.
Specific embodiment
Spiral-pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis proposed by the present invention, its structure is such as
Shown in Fig. 1, tilt conveying pipeline 4, second and tilt conveying pipeline 5, one-level including buncher 13, hopper 1, feeding screw 2, first
Electromagnetic valve 11, two-stage electromagnetic valve 9, first order jet nozzle 10, secondary nozzle 7 and carrier gas bottle 12.The output shaft of buncher 13 and spiral
The rotary shaft of feeder 2 is connected, and the bottom of hopper 1 is connected with the charging aperture of feeding screw 2, the discharging opening of feeding screw 2
It is connected with upper strata conveying pipeline 14 by transit joint 3, one end of upper strata conveying pipeline 14 is provided with first order jet nozzle 10, first order jet nozzle 10 leads to
Cross the first appendix 16 to be connected with carrier gas bottle 12, the first appendix 16 is provided with pressure gauge and one-level electromagnetic valve 11, and upper strata is defeated
The other end of expects pipe 14 is connected with lower floor conveying pipeline 15 by the first inclination conveying pipeline 4, and one end of lower floor's conveying pipeline 15 is provided with two
Level nozzle 7, secondary nozzle 7 is connected with carrier gas bottle 12 by the second appendix 17, and the second appendix 17 is provided with pressure gauge 8 and two
Level electromagnetic valve 9, the other end of lower floor's appendix 15 is connected with reactor 6 by the second inclination conveying pipeline 5.
Spiral-pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis proposed by the present invention, wherein, hopper
The tapered wall of bottom is more than necessary 50 ° with horizontal plane oblique angle.
Below in conjunction with accompanying drawing, operation principle and the work of of the present invention spiral-pulsed the mixture of airstream and strength feeder are discussed in detail
Process：
As shown in figure 1, spiral feeding part includes：Hopper 1, feeding screw 2 and buncher 13.Wherein, hopper 1
Vertically place, hopper 1 is tightly connected with feeding screw 2 and junction is detachable.Buncher 13 horizontal positioned, and and spiral
Feeder 2 is indirectly connected with, and changes charging rate and the inlet amount of feeding screw by controlling the rotating speed of buncher；
Air conveying part includes：Transit joint 3, inclination conveying pipeline A 4, inclination conveying pipeline B 5, secondary nozzle 7, pressure
Table 8, two-stage electromagnetic valve 9, first order jet nozzle 10, one-level electromagnetic valve 11, carrier gas bottle 12；One-level electromagnetic valve 11 is with first order jet nozzle 10 even
Connect；One horizontal port of transit joint 3 connects first order jet nozzle 10, and another horizontal port connects to tilt conveying pipeline A 4, transition
The vertical port of joint 3 is connected with the powder outlet end of feeding screw 2；One end of secondary nozzle 7 connects two-stage electromagnetic valve 9,
The other end connects inclination conveying pipeline A 4 respectively and tilts conveying pipeline B 5, tilts conveying pipeline B 5 and is connected with reactor 6；Carrier gas
Bottle 12 is connected with two-stage electromagnetic valve 9 and one-level electromagnetic valve 11 respectively；Pressure gauge 8 is separately mounted to one-level electromagnetic valve 11 and one-level spray
Between mouth 10 and between two-stage electromagnetic valve 9 and secondary nozzle 7.
Under powder acts in the push of self gravitation effect, and feeding screw 2, enter feeding screw 2 from hopper 1,
Move to feeding screw 2 powder outlet end when, open one-level electromagnetic valve 11, the gases at high pressure in carrier gas bottle 12 from one-level spray
Spray at mouth 10, so that the flow direction of powder is changed, and provide initial driving force for powder, it is to avoid produce blocking during transition, in pipe
Gas to a certain degree applies to regurgitate pressure to hopper, the oxygen-containing sky that wherein powder is mingled with by a small amount of gas by feeding screw 2
Gas is filtered to remove；Protect reactor 6 normal heating to run, before powder enters reactor 6, open two-stage electromagnetic valve 9, be spaced one
Close one-level electromagnetic valve 11 after fixing time, the gases at high pressure in carrier gas bottle 12 spray at secondary nozzle 7, improve powder in reaction
Flowing velocity at device 6 charging aperture, in the off time that guarantee one-level electromagnetic valve 11 cuts out simultaneously, material is close to reactor 6
Tilt in conveying pipeline B 5 and do not stop, it is to avoid powder is before entering reactor 6 because particle entrapment causes granule in pipeline bottom
Pile up, and because high temperature leads to powder to shift to an earlier date carbonization pyrolysis and piles up caking, thus causing the problem of pipeline blockage.Tilt defeated close
Temperature range at reactor, below 200 DEG C, during higher than 200 DEG C, need to be lowered the temperature using condensing units.Embodiment 2, for ensure into
Material is smooth, it is to avoid powder is piled up in the side of hopper 1 and built bridge, and on the basis of embodiment 1, makes side and the level of hopper 1
Angle between face need to meet powder and smoothly glide, and need if necessary to ensure that powder smoothly enters using the gas methods promoting powder flowing
Enter in feeding screw.
In one embodiment of the spiral of the present invention-pulsed the mixture of airstream and strength feeder, in order to according to process requirements
To control the inlet amount of powder, using frequency modulation motor, and by the control to buncher rotating speed, to adjust feed rate and charging
Amount, sets inlet amount as 10kg/h, helical blade 3 internal diameter 15mm, external diameter 36mm, pitch 25mm, and the internal diameter of hopper 2 is 40mm,
The rotating speed of frequency modulation motor is traditionally arranged to be 10r/min, you can preferably realize the inlet amount demand of 10kg/h.In order to make device
Not because of powder performance blocking pipeline itself, need to ensure the performance range of powder：The ratio of powder particle size and conveying tubing internal diameter exists
(1/40-3/16) between, and powder particles shape is more regular (circle is preferred partially), and ensure moisture content 5%～25% it
Between.Pressure in order to ensure air injection meets the demand of inlet amount, and the gas stated in carrier gas bottle 12 can be the nothing after supercharging
Oxygen or the extremely low gas of oxygen content, biomass pyrolysis process replaces with reference to the not condensable gases after filtering and being pressurized,
Gas use cost can be reduced.According to the demand of 10kg/h inlet amount, carrier gas gas consumption flow is about 40L/min, carrier gas bottle 12 with
Pressure differential between reactor 6 is 100kPa.Mixture for ensureing gas and powder flows smooth in pipeline, and makes
Secondary nozzle 7 is easy for installation, makes full use of gravity inertial as far as possible, can adjust the second inclination conveying while reducing bend pipe loss
Angle between pipe 5 and horizontal plane, adjust to powder smooth by and inlet amount is optimal.For ensureing the mixture of gas and powder
Flow in pipeline smooth, reduce the probability that BOP deposits material, adjustment first tilts between conveying pipeline 4 and horizontal plane
Angle, make powder not produce accumulation in bottom.For avoiding powder long in the high-temperature region time of staying, powder is led to be heated carbonization
Blockage problem, can make the loop cycle of pulsed nozzle injection be followed successively by：Only first order jet nozzle 10 spray, first order jet nozzle 10 and two
Level nozzle 7 sprays simultaneously, only secondary nozzle 7 sprays, first order jet nozzle 10 and secondary nozzle 7 spray Four processes altogether simultaneously.For
Reasonable adjustment inlet amount, can increase speed of screw shaft, reduce injection cycle, or improve nozzle exit pressure all can be effectively increased into
Doses.For example, the revolution speed of screw 10r/min of feeding screw, larch powder particle granularity, between 0.6～1.2mm, is piled up
Density 150g/m3, first order jet nozzle pressure 0.05MPa, frequency 1s, secondary nozzle pressure 0.05MPa, frequency is 2s, strength conveying
Caliber 8mm, now inlet amount is 20g/min.
Claims (1)
1. a kind of spiral-pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis is it is characterised in that this is mixed into
Glassware include buncher, hopper, feeding screw, first tilt conveying pipeline, second tilt conveying pipeline, one-level electromagnetic valve, two
Level electromagnetic valve, first order jet nozzle, secondary nozzle and carrier gas bottle；The output shaft of described buncher and described feeding screw
Rotary shaft is connected, and the described bottom of hopper is connected with the charging aperture of feeding screw, and the discharging opening of feeding screw passed through
Cross joint to be connected with upper strata conveying pipeline, one end of upper strata conveying pipeline is provided with first order jet nozzle, first order jet nozzle pass through the first appendix with
Described carrier gas bottle is connected, and the first appendix is provided with pressure gauge and one-level electromagnetic valve, and the other end of upper strata conveying pipeline passes through
First inclination conveying pipeline is connected with lower floor conveying pipeline, and one end of lower floor's conveying pipeline is provided with secondary nozzle, and secondary nozzle is by second
Appendix is connected with carrier gas bottle, and the second appendix is provided with pressure gauge and two-stage electromagnetic valve, and the other end of lower floor's appendix passes through
Second inclination conveying pipeline is connected with reactor.
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| CN201510289229.6A CN104877694B (en) | 2015-05-29 | 2015-05-29 | Spiral pulsed the mixture of airstream and strength feeder for mobile biomass pyrolysis |
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| CN104877694B true CN104877694B (en) | 2017-03-08 |
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| CN109111940A (en) * | 2018-07-20 | 2019-01-01 | 北京林业大学 | A kind of miniature movable type agricultural and forest biomass fast pyrolysis liquefying plant |
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| CN114196427B (en) * | 2021-12-02 | 2022-09-23 | 北京航天石化技术装备工程有限公司 | Sealed automatic feeding device and method for waste plastic pyrolysis treatment system |
| CN117210247A (en) * | 2023-11-09 | 2023-12-12 | 浙江凤登绿能环保股份有限公司 | Method for preparing synthesis gas by gasifying biomass entrained flow |
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| SU463602A1 (en) * | 1971-03-02 | 1975-03-15 | Горловский Филиал Донецкого Ордена Трудового Красного Знамени Политехнического Института | Screw feeder for pneumatic conveying materials |
| EP0060137A1 (en) * | 1981-03-10 | 1982-09-15 | Macawber Engineering Limited | Conveying systems |
| DE19807988B4 (en) * | 1998-02-26 | 2007-11-08 | Wolf, Bodo, Dr.-Ing. | Process for the separation of volatile components from solid fuels |
| CN101560405A (en) * | 2009-05-25 | 2009-10-21 | 顾赛 | Method for preparing liquid fuels by self-heating self-circulating thermal cracking of biomass and device thereof |
| CN102513030A (en) * | 2012-01-09 | 2012-06-27 | 北京林业大学 | Gravity type biomass feeding device |
| CN204644271U (en) * | 2015-05-29 | 2015-09-16 | 北京林业大学 | For the spiral-pulsed the mixture of airstream and strength feeder of mobile biomass pyrolysis |
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2015
- 2015-05-29 CN CN201510289229.6A patent/CN104877694B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU463602A1 (en) * | 1971-03-02 | 1975-03-15 | Горловский Филиал Донецкого Ордена Трудового Красного Знамени Политехнического Института | Screw feeder for pneumatic conveying materials |
| EP0060137A1 (en) * | 1981-03-10 | 1982-09-15 | Macawber Engineering Limited | Conveying systems |
| DE19807988B4 (en) * | 1998-02-26 | 2007-11-08 | Wolf, Bodo, Dr.-Ing. | Process for the separation of volatile components from solid fuels |
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