CN202390392U - Microwave plasma biomass entrained bed gasification furnace - Google Patents
Microwave plasma biomass entrained bed gasification furnace Download PDFInfo
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- CN202390392U CN202390392U CN2011205613386U CN201120561338U CN202390392U CN 202390392 U CN202390392 U CN 202390392U CN 2011205613386 U CN2011205613386 U CN 2011205613386U CN 201120561338 U CN201120561338 U CN 201120561338U CN 202390392 U CN202390392 U CN 202390392U
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Abstract
The utility model relates to a microwave plasma biomass entrained bed gasification furnace. The gasification furnace comprises a vertical furnace body, a fuel inlet arranged on the lower part of the furnace body, a synthesis gas outlet at the top of the furnace body and a slag discharge hole, and a fuel pretreatment system is arranged outside the furnace body, wherein the fuel pretreatment system comprises a fuel crushing device, a screening device arranged on the downstream of the fuel crushing device, a grain size qualification fuel bin, a grain size disqualification fuel bin and a furnace-front bin arranged on the downstream of the grain size qualification fuel bin; the grain size qualification fuel bin and the grain size disqualification fuel bin are arranged in parallel on the downstream of the screening device; the bottom of the furnace-front bin is connected with the furnace body through a burning nozzle; and the synthesis gas outlet at the top of the gasification furnace is provided with a synthesis gas monitoring unit. According to the gasification furnace, the combination of microwaves and a plasma technology thereof and a high-efficiency entrained bed technology is mainly adopted, and on the basis of the characteristic of high reaction activity of biomass fuels, the high-efficiency conversion of biomass fuel chemical energy is realized in the furnace, which provides a new approach for the industrial utilization of preparing synthesis gas from the biomass fuels.
Description
Technical field
The utility model is primarily aimed at and adopts biomass fuel is the gasifying process field of raw material, is that a kind of microwave plasma air flow bed technology reaches the vapourizing furnace that efficiently utilizes biomass fuel to produce high-quality synthetic gas specifically.
Background technology
At present, in Biomass Energy Utilization technology, biomass gasification technology is because of wideer to the flexibility of biomass kind, and the product extendability is stronger, thereby development potentiality is huge.Problems such as the biogas metallization processes roughly exists fixed bed, fluidized-bed, these three kinds of technologies of air flow bed, and biomass fixed-bed technology mainly exists gasification temperature low, and tar content is big, and the synthetic gas quality is low; Though bed temperature is even in the fluidized bed gasifying process, feed and deslagging are easy, but owing to need guarantee stabilization fluid, the interior temperature of stove is difficult for too high, causes tar content higher.Contain tar in the synthetic gas, then purification process need spend than big cost and handle, and the difficult removal of tar, and the tar enrichment can be stopped up valve, pipeline and equipment, and its generation is corroded, thereby hazardness is very big.And the gasification reaction temperature is high in the air flow bed, and furnace temperature is even, and gasification efficiency is high; Tar is cracking fully in stove, and subsequent technique is handled simple, and air flow bed has amplification preferably; Be fit to the industrially scalable utilization, still existing air flow bed technology is had relatively high expectations to raw material feed particle diameter, generally all requires less than 0.1mm; Coal-fired gasification technology even require lowlyer particularly, and that the more raw material of this fibrid cellulose content of biomass can't be crushed to air flow bed is needed than small particle size, and broken particle diameter is more little; The crusher wearing and tearing are more severe, and power consumption is also high more; Greater particle size then can cause efficiency of carbon conversion reduction in the air flow bed technology, and cold gas efficiency reduces, and has limited utilization and the development of conventional air flow bed technology aspect biomass fuel like this.
The utility model content
The purpose of the utility model is to propose a kind of biogas of microwave plasma efficiently fluidized gas producer, solves above-mentioned biomass and produces a series of problems that exist in the synthetic gas, and for biomass fuel is produced synthetic gas, particularly CO and H
2Synthetic gas a kind of economy, efficient, feasible industrial equipment are provided.
The utility model is for solving the problems of the technologies described above, and the technical scheme of taking is following:
Microwave plasma biogas fluidized gas producer; The fuel inlet that is arranged on the body of heater bottom that comprises the body of heater of vertical setting, constitutes by burner, the syngas outlet at body of heater top, the slag-drip opening of bottom of furnace body; Body of heater also is provided with the fuel pretreatment system outward; Comprise the fuel crushing device, be positioned at the storehouse, stokehold that the screening plant in fuel crushing device downstream, particle diameter proper fuel storehouse that the screening plant downstream are set up in parallel and the defective fuel bunker of particle diameter and downstream, particle diameter proper fuel storehouse are provided with, the bottom in storehouse, stokehold links to each other with body of heater through burner; The top of gasification furnace syngas outlet is furnished with the synthetic gas monitoring means; Burner is along the body of heater radial arrangement, and quantity is 2～4; It is characterized in that, arrange 1～2 layer of microwave plasma producer up and down in the gasification reaction district of body of heater, every layer of microwave plasma producer arranged 2～4 working gas access ports.
The microwave plasma producer adopts level/arranged tangential mode, to increase carbon containing biomass stroke and the residence time of melt granules in plasma atmosphere.
Microwave plasma producer employing interelectrode distance is big, active strong, the wide plasma generator of volume range of plasma body.
Microwave plasma producer microwave power source dominant frequency 2.45GHz is in the about 200kW of separate unit power.
The technology that adopts above-mentioned vapourizing furnace to carry out the biogas fluidized bed gasification mainly comprises the steps:
1) obtain the qualified biomass fuel powder of particle diameter after biomass fuel process fuel pretreatment system fragmentation earlier, the screening, and it is subsequent use to send into the storehouse, stokehold;
2) the microwave plasma working gas gets into the plasma generator from inlet, is excited into high temperature, high ionization degree, highly active plasma body and sprays in the vapourizing furnace;
3) the biomass fuel powder sprays in the vapourizing furnace through burner; Simultaneously oxygenant is sent into system from oxygen/steam-in; Spray in the vapourizing furnace simultaneously with biomass fuel; The biomass fuel powder carries out the reaction of high temperature rapid heat chemical in the highly active plasma atmosphere in stove, generate to contain a large amount of CO, H
2Synthetic gas;
4) synthetic temperature degree, composition are monitored adjustment oxygen flow, steam flow and microwave power in real time, keep the gasifying process parameter in span of control; 900 ℃～1200 ℃ of syngas outlet temperature; Final high-temperature synthesis gas from the top syngas outlet draw, liquid slag is discharged by slag-drip opening simultaneously.
In the step 1); Isolate the fuel entering proper fuel storehouse of satisfying the setting grain size by setting particle diameter; The excessive fuel of particle diameter then gets into the defective fuel bunker of particle diameter, and fuel will be returned to send into and continue to be crushed in the fuel crushing device than small particle size in the defective fuel bunker of particle diameter, until qualified; It is subsequent use to be delivered to storehouse, vapourizing furnace stokehold through biomass fuel pellet broken, that the setting grain size is satisfied in the screening back by the proper fuel storehouse; The particle diameter of biomass fuel powder is 0～5mm.
Step 2) in; Gasifier nozzle puts into operation and promptly opened the microwave plasma producer in preceding 2～3 seconds; The microwave plasma working gas of partially oxidation agent form gets into the microwave plasma producer through microwave plasma working gas inlet, is energized high temperature, high ionization degree, highly active plasma gas subsequently and sprays into vapourizing furnace.
In the step 3), the biomass fuel powder is sprayed in the vapourizing furnace by gasifying furnace nozzle through carrier gas; Oxygenant gets into system through oxygen/steam-in; Spray into simultaneously in the vapourizing furnace with biomass fuel, owing to adopt high-temperature gasification technique, fuel moment catches fire and in stove, carries out violent partially oxidation reduction reaction; Biomass fuel is under the high temperature anaerobic environment, and generation contains a large amount of CO, H
2With few portion C O
2, CH
4, H
2The synthetic gas of S, COS composition;
It also is the gasification reaction district that synthetic gas goes upward to the plasma reaction district; Mix with high temperature, high ionization degree, highly active plasma gas that level/tangential sprays into, and carry out efficient gas-phase reaction, elevated temperature heat chemistry gasification reaction district temperature is 1200 ℃～1800 ℃; The central section temperature is 1800 ℃～2000 ℃; Synthetic gas is set at 1～10 second in the residence time in gasification reaction district, and the controlled microwave plasma power promotes that sufficient reacting carries out simultaneously.
In the step 4), effective constituent CO and H in the syngas product
2Volume content is up to more than 85%, and do not have tar, aldehydes matter in the synthetic gas; The biomass liquid slag is discharged out of the furnace by vapourizing furnace bottom slag-drip opening, can realize nuisanceless processing after the Quench, also is good heat-insulating construction material simultaneously.
Step 2) and 3) in, microwave plasma working gas and carrier gas are air and/or oxygen and/or steam; Steam derives from the recovery to self high-temperature synthesis gas sensible heat.
Be furnished with the microwave plasma producer at this technology gasification reaction zone; The microwave plasma producer is the equipment that produces the stable plasma body of opening through the microwave-excitation working gas; The microwave plasma that is rich in oxygenant that excites has the temperature height, degree of ionization is high, dispersity is big; Active strong characteristics are when spraying into an amount of microwave plasma working gas, under the effect of the highly active plasma body of high temperature in air flow bed redox district; Can improve reaction zone temperature on the one hand, promote chemical reaction; On the other hand because the plasma activity is high, reaction is strong; Can greatly improve the chemical reaction between gas phase synthetic gas and solid phase/liquid phase biological particles, accelerate the speed of heat and mass, make the chemistry of fuel reaction times shorten; On identical residence time basis; Improved fuel conversion, simultaneously because the relative coal of biomass fuel has big, the active height of hole, low-melting characteristics, thereby in the plasma reaction atmosphere of high temperature high ionization degree; The biomass fuel particle diameter can adopt apparently higher than the required fuel particle diameter of conventional air flow bed, and finally can reach ideal effect.
Once more; The microwave plasma producer can not only provide a part of oxygenant for reaction, improve balance and homogeneity that reactant is supplied with, and microwave plasma has also been imported a certain amount of thermal power simultaneously; A part of outer thermal source is provided, has increased a kind of regulating measure of gasifier operation.
The beneficial effect of the utility model is:
1. adopt microwave plasma air flow bed high-temperature technology, the advantage of high activity that combines biomass fuel self to have, realization biomass fuel chemical energy efficiently transforms in stove, and efficiency of carbon conversion is up to about 99%, and cold gas efficiency is more than 85%, CO and H
2Active constituent content is high.
2. adopting in the microwave plasma high temperature gas flow bed process synthetic gas does not have tar, no aldehydes matter, and later use technology is simple.
3. to biomass fuel particle diameter wide accommodation, need not undue fragmentation, good economy performance; And can realize biological particles is gasified in air flow bed through the microwave plasma air flow bed, solve big, the less economical difficult problem of difficulty that needs the little biomass fuel of employing particle diameter to bring in the conventional entrained flow gasification technology.
4. feed, deslagging are easy, and gasification intensity is big, maximize easily.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the utility model is described.
Fig. 1 is the microwave plasma biogas fluidized gas producer and the process flow diagram of the utility model preferred embodiment;
Fig. 2 is the A-A view of Fig. 1.
Wherein: fuel crushing device 1; Screening plant 2; Particle diameter proper fuel storehouse 3; The defective fuel bunker 4 of particle diameter; Storehouse, stokehold 5; Burner 6; Microwave plasma producer 7; Vapourizing furnace 8, syngas outlet 9; Slag-drip opening 10; Microwave plasma working gas inlet 11; Monitoring means 12; Oxygen/steam-in 13.
Embodiment:
Microwave plasma biogas fluidized gas producer 8 as illustrated in fig. 1 and 2; The fuel inlet that is arranged on the body of heater bottom that comprises the cylindric body of heater of vertical setting, constitutes by burner 6, the syngas outlet 9 at body of heater top, the slag-drip opening 10 of bottom of furnace body; Body of heater also is provided with the fuel pretreatment system outward; Comprise fuel crushing device 1, be positioned at the storehouse, stokehold 5 that the screening plant 2 in fuel crushing device 1 downstream, particle diameter proper fuel storehouse 3 that screening plant 2 downstream are set up in parallel and the defective fuel bunker 4 of particle diameter and 3 downstream, particle diameter proper fuel storehouse are provided with, the logical burner 6 in the bottom in storehouse, stokehold 5 links to each other with body of heater; It is characterized in that, arrange 1～2 layer of microwave plasma producer 7 up and down in the gasification reaction district of body of heater, to increase plasma reaction district scope, every layer of microwave plasma producer arranged 2～4 working gas access ports 11 (being illustrated in figure 2 as 3).The vapourizing furnace body of heater can be cylindric, also can be the array configuration of circular cone and cylinder.
Also there are considerable influence in the position and the decoration form of microwave plasma layout points to technology; In the utility model; The two kinds of decoration forms in microwave plasma producer 7 employing level/tangentials; Make that like this reaction gas flow flow-disturbing is abundant, to increase carbon containing biomass stroke and the residence time of melt granules in plasma atmosphere.
Top of gasification furnace syngas outlet 9 is furnished with synthetic gas monitoring means 12, can realize that the monitoring of online involutory one-tenth temperature degree, composition comes adjustment oxygen flow, steam flow and microwave power in real time, keeps the gasifying process parameter in span of control.
Microwave plasma producer employing interelectrode distance is big, active strong, the wide plasma generator of volume range of plasma body.
Microwave plasma producer microwave power source dominant frequency 2.45GHz is in the about 200kW of separate unit power.
The technology that adopts above-mentioned vapourizing furnace 8 to carry out the biogas fluidized bed gasification mainly comprises the steps:
1) obtains the qualified biomass fuel powder of particle diameter behind biomass fuel process fuel crushing device 1, the screening plant 2;
At first, biomass fuel through the fuel crushing device 1 of fuel pretreatment system, is crushed to suitable dimension earlier, and broken size is the key of this process economy, and broken particle diameter is excessive, and then gasifying process efficient is low, and efficiency of carbon conversion is low; Broken particle diameter is too small, crusher serious wear then, and power consumption is high, and is less economical.Broken back fuel gets into fuel screening plant 2; Isolate the fuel entering proper fuel storehouse 3 of satisfying the setting grain size by setting particle diameter; The excessive fuel of particle diameter then gets into the defective fuel bunker 4 of particle diameter; And fuel will be returned to send into and continue to be crushed in the fuel crushing device 1 than small particle size in the defective fuel bunker 4 of particle diameter, until qualified.With the rice husk is example, and rice husk former state particle diameter is for being about 7～10mm, wide 2mm, and profile such as ship shape only need simple crushing to 1～5mm particle diameter fuel promptly capable of using.With branch, stalk class is example, and branch, stalk former state particle diameter are bigger, and about optional disc type or drum crusher to 50～100mm, it is promptly capable of using to adopt beater grinder to be crushed to 1～5mm particle diameter fuel by feed pretreating scheme as stated again.
2) the microwave plasma working gas 11 gets into the plasma generators 7 from entering the mouth, and is excited into high temperature, high ionization degree, highly active plasma body and sprays in the vapourizing furnace 8;
3) carrier gas sprays into biomass fuel in the vapourizing furnace 8 through burner 6; Simultaneously oxygenant 13 is sent into system from oxygen/steam-in; Spray in the vapourizing furnace simultaneously with biomass fuel; The biomass fuel powder carries out the reaction of high temperature rapid heat chemical in the highly active plasma atmosphere in stove, generate to contain a large amount of CO, H
2With few portion C O
2, CH
4, H
2The synthetic gas of S, COS composition.
After fragmentation, screening, satisfy the biomass fuel pellet of setting grain size and be delivered to storehouse, vapourizing furnace stokehold 5 by proper fuel storehouse 3, air conveying to gasifying furnace nozzle 6 places through vaporized chemical in 5 bottoms, storehouse, stokehold, 6 places spray in the vapourizing furnace by nozzle; Oxygenant is through oxygen/steam-in 13 entering systems; Spray into simultaneously in the vapourizing furnace with biomass fuel, owing to adopt high-temperature gasification technique, fuel moment catches fire and in stove, carries out violent partially oxidation reduction reaction; Biomass fuel is under the high temperature anaerobic environment, and generation contains a large amount of CO, H
2With few portion C O
2, CH
4, H
2The synthetic gas of S, COS composition;
It also is the gasification reaction district that synthetic gas goes upward to the plasma reaction district; Mix with high temperature, high ionization degree, highly active plasma gas that level/tangential sprays into, and carry out efficient gas-phase reaction, elevated temperature heat chemistry gasification reaction district temperature is 1200 ℃～1800 ℃; The central section temperature can be up to 1800 ℃～and 2000 ℃; Guarantee 1～10 second residence time in this gasification reaction district in the technological design, the controlled microwave plasma power promotes that sufficient reacting carries out simultaneously; Final synthetic gas is drawn effective constituent CO and H in the syngas product by top of gasification furnace syngas outlet 9
2Volume content is up to more than 85%, and do not have tar, aldehydes matter in the synthetic gas.The biomass liquid slag is discharged out of the furnace by vapourizing furnace slag-drip opening 9, can realize nuisanceless processing after the Quench, also is good heat-insulating construction material simultaneously.The steam that adopts in the technology derives from the recovery to high-temperature synthesis gas.
4) synthetic temperature degree, composition are monitored adjustment oxygen flow, steam flow and microwave power in real time, keep the gasifying process parameter in span of control; 900 ℃～1200 ℃ of syngas outlet temperature; High-temperature synthesis gas from the top syngas outlet 9 draw, simultaneously liquid slag is discharged by bottom slag-drip opening 10.
In the step 1), the particle diameter of biomass fuel powder is 0～5mm, and preferred embodiments is about 2mm.
Step 2) and 3) in, microwave plasma working gas and carrier gas are air and/or oxygen and/or steam; Steam derives from the recovery to self high-temperature synthesis gas sensible heat.
In order to make this technology reach the best effort effect, satisfy the requirement of technology overall performance, key is the control bed temperature in the design, regulates the feed rate of microwave plasma power and oxygen, steam.Through the syngas outlet monitoring device is reached the control to above-mentioned key factor, also can realize chain control, carry out full-automatic operation, improve operation stability.
The above disclosed preferred embodiment that is merely the utility model can not limit the interest field of the utility model certainly with this, so according to the equivalence variation that the utility model claim is done, still belong to the protection domain of the utility model.
Claims (4)
1. microwave plasma biogas fluidized gas producer; The fuel inlet that is arranged on the body of heater bottom that comprises the body of heater of vertical setting, constitutes by burner, the syngas outlet at body of heater top, the slag-drip opening of bottom of furnace body; Body of heater also is provided with the fuel pretreatment system outward; Comprise the fuel crushing device, be positioned at the storehouse, stokehold that the screening plant in fuel crushing device downstream, particle diameter proper fuel storehouse that the screening plant downstream are set up in parallel and the defective fuel bunker of particle diameter and downstream, particle diameter proper fuel storehouse are provided with, the bottom in storehouse, stokehold links to each other with body of heater through burner; The top of gasification furnace syngas outlet is furnished with the synthetic gas monitoring means; Burner is along the body of heater radial arrangement, and quantity is 2～4; It is characterized in that, arrange 1～2 layer of microwave plasma producer up and down in the gasification reaction district of body of heater, every layer of microwave plasma producer arranged 2～4 working gas access ports.
2. vapourizing furnace according to claim 1 is characterized in that microwave plasma producer employing level/arranged tangential mode.
3. vapourizing furnace according to claim 1 and 2 is characterized in that microwave plasma producer employing interelectrode distance is big, active strong, the wide plasma generator of volume range of plasma body.
4. vapourizing furnace according to claim 3 is characterized in that microwave plasma producer microwave power source dominant frequency 2.45GHz, in the about 200kW of separate unit power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205613386U CN202390392U (en) | 2011-12-29 | 2011-12-29 | Microwave plasma biomass entrained bed gasification furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205613386U CN202390392U (en) | 2011-12-29 | 2011-12-29 | Microwave plasma biomass entrained bed gasification furnace |
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| CN202390392U true CN202390392U (en) | 2012-08-22 |
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|---|---|---|---|
| CN2011205613386U Withdrawn - After Issue CN202390392U (en) | 2011-12-29 | 2011-12-29 | Microwave plasma biomass entrained bed gasification furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559272A (en) * | 2011-12-29 | 2012-07-11 | 武汉凯迪工程技术研究总院有限公司 | Microwave plasma biomass entrained flow gasifier and process |
-
2011
- 2011-12-29 CN CN2011205613386U patent/CN202390392U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559272A (en) * | 2011-12-29 | 2012-07-11 | 武汉凯迪工程技术研究总院有限公司 | Microwave plasma biomass entrained flow gasifier and process |
| CN102559272B (en) * | 2011-12-29 | 2014-05-14 | 武汉凯迪工程技术研究总院有限公司 | Microwave plasma biomass entrained flow gasifier and process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120822 Effective date of abandoning: 20140514 |
|
| RGAV | Abandon patent right to avoid regrant |