CN105505478B - A kind of dizzy thick gas cleaning device of gasification of biomass of electric tornado flow photoelectricity and method - Google Patents

A kind of dizzy thick gas cleaning device of gasification of biomass of electric tornado flow photoelectricity and method Download PDF

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CN105505478B
CN105505478B CN201510868340.0A CN201510868340A CN105505478B CN 105505478 B CN105505478 B CN 105505478B CN 201510868340 A CN201510868340 A CN 201510868340A CN 105505478 B CN105505478 B CN 105505478B
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electric
gas
thick
electrode bar
gasification
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CN105505478A (en
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谢建军
黄艳琴
阴秀丽
吴创之
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Guangzhou Institute of Energy Conversion of CAS
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Guangzhou Institute of Energy Conversion of CAS
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/002—Removal of contaminants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/02—Dust removal
    • C10K1/026—Dust removal by centrifugal forces
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/02—Dust removal
    • C10K1/028—Dust removal by electrostatic precipitation
    • 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
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C10L3/101—Removal of contaminants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/10—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/16—Hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/20—Carbon monoxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/22—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/24—Hydrocarbons
    • B01D2256/245—Methane

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Industrial Gases (AREA)

Abstract

The invention discloses a kind of dizzy thick gas cleaning device of gasification of biomass of electric tornado flow photoelectricity and method, including electric cyclone reactor, the electric cyclone reactor includes cylindrical upper cavity and coniform lower chamber, and sets tangential thick gas inlet in the cylindrical upper cavity upper limb；Cylindrical upper cavity is connected with clean fuel gas outlet, and one end that the clean fuel gas outlet is connected with the cylindrical upper cavity is inserted in the cylindrical upper cavity；Metal hollow electrode bar is placed in the electric cyclone reactor axis center, and the jagged discharge tip of 1 to 4 group is provided with the electrode bar, the discharge tip is perpendicular to the electrode bar axle center and is fixed in the shape of a spiral on the electrode bar.Beneficial effects of the present invention：The tar molecules in thick combustion gas are made to be cracked into CO, H rapidly in streamer evolution2、CH4、CO2Deng micro-molecular gas；And combine coupling power of the electric field centrifugal force field to dust and realize that gas-solid is rapidly separated；Realize efficient removal dust.

Description

A kind of dizzy thick gas cleaning device of gasification of biomass of electric tornado flow photoelectricity and method
Technical field
The present invention relates to a kind of thick gas cleaning device of gasification of biomass and method, especially with electric tornado flow photoelectricity Corona plasma removes the apparatus and method of tar and dust in thick combustion gas simultaneously.
Background technology
Gasification of biomass is to obtain thick combustion gas more effectively one of conversion means, can be transformed into biomass high-grade Gaseous fuel, it can be not only used for industrial generation, cogeneration of heat and power, central gas supply, industrial heating heat supply；Can also be synthetic liquid fuel, The processes such as fuel cell provide source of the gas.
Based on different reactor pattern and variation of operating parameters, the thick combustion gas that gasification of biomass obtains contains what quantity did not waited Tar and dust.Tar is defined as the organic pollution that molecular weight is more than or equal to benzene；Dust includes flying dust, bed and not burnt Carbon residue, both harm can be summarized as：1) gas purification intractability and complexity are increased；2) tar light oil such as phenol, which is dissolved in, washes Water pollution can be caused by washing water, and as naphthalene can form Crystallization Plugging valve and generating equipment, other heavy tars occur below at 350 DEG C Condensation can block internal combustion engine intercooler；3) the corrodible internal combustion engine of tar acidic components or gas turbine cylinder；4) it is applied to F-T is synthesized or the occasion such as fuel cell, catalyst surface carbon distribution can be caused to inactivate, it is necessary to frequent regeneration and increase replacement cost； 5) system gasification efficiency and efficiency of energy utilization are reduced.Therefore, thick combustion gas can just be used after having to pass through deep purifying.
Tar purifying technology mainly has following several in the prior art：1) physical removal, 2) thermal cracking；3) catalytic pyrolysis.
Physical removal includes dry type and wet purification two ways, and common equipment has cyclone separator, sack cleaner, text Washer, electrostatic precipitator, spray column etc. in mound, physical removal mode also have certain while purifying and stive, to tar Removing acts on.But these cleaners are all poor to the clean-up effect of tar, to be combined with other coke tar cracking equipment to reach To preferable effect.
Thermal cracking refers to the tar pyrolytic of more than 900 DEG C of reaction temperature, can be produced while pyrolysis fuel oil hot steady Qualitative higher macromolecular substances, and generate a small amount of soot.Crude product gas thus energy consumption be present because the process needs to heat up The shortcomings that higher, and a part of combustible gas can be burnt in thermal cracking processes so as to sacrifice the calorific value of synthesis gas.
In stove or the outer catalytic pyrolysis of stove makes it possible tar low temperature pyrolyzer, and tar ingredients are optionally cracked into Light gas, thus the calorific value of synthesis gas can be increased；But it is low frangible etc. catalyst surface carbon distribution, short life, mechanical strength to be present Deficiency.
Removed in addition for dust, cyclone separator is common dust removal device, is had to more than 20 μm particles>95% Clearance, but diminish with dust size, clearance drastically declines.And study the fixed bed gasification work shown using wood as raw material Skill, the particle in synthesis gas below 5 μm of particle diameter can account for 75% or so of total particle mass fraction.Therefore imitated to improve dedusting Rate, in practical application often by the way of multistage cyclone series connection；In addition in order to strengthen the seizure effect to less than 5 μm dust, The equipment such as wet scrubber, cloth bag, electric cleaner would generally be installed in downstream.Wet scrubber is typically using water as medium, thus Operation temperature is less than 100 DEG C, and this will necessarily lose thick combustion gas sensible heat for the internal combustion engine or reforming reactor in downstream.Cloth bag Deduster operation temperature is slightly higher and can filter 0.5-100 μm of particle, but is limited to filter the heat resistance of fabric material, operation temperature Typically below 250 DEG C, this is obviously unfavorable for handling the thick combustion gas containing tar, dust simultaneously degree, because heavy tar condenses It is extremely difficult after cloth bag surface to be removed by way of rapping, blowback.Another dust removal method is electrostatic precipitation, and is removed using electrostatic The operation principle of the electrostatic precipitator of dirt is to make flue gas occur to ionize using high voltage electric field and make dust charged, in the work of electric field force Realize that dust separates with flue gas under, there is up to 95-99% clearance to 20 μm of particles for being less than 5 μm particularly below. But it is used for thick combustion gas dust purification, tar dust is easily attached to collecting electrode simultaneously, causes electric charge to tire out as dust layer thickens Product, form internal field and repel follow-up dust deposit, produce inverse corona and reentrainment of dust, thus make efficiency of dust collection degradation. Ceramic filter can operate under 600-800 DEG C of high temperature and obtain preferable dust-filtering effect, however exist involve great expense and The shortcomings that cracky.
As can be seen here, in the prior art thick gas-purification be still gasification of biomass commercial Application technical bottleneck problem it One, this mainly has following 2 reasons：
1) waste gas purification is different from, background gas are that thick combustion gas must reclaim, i.e., purification process can not reduce thick combustion gas list Position volume calorific value or H2/ CO mol ratios；
2) two kinds of tar, dust pollutants simultaneously be present in synthesis gas, they are separately handled necessarily keep in check in Another pollutant purification process：Such as first dedusting after-purification tar scheme, can only use can keep tar existence form as gas The high-temperature dust removal of state, and the purge gas flow in dust removal process is unsuitable excessive, otherwise can reduce flow rate；Again such as Using first performing catalytic pyrolysis on tar dust-cleaning scheme again, then dust is faced catalyst surface constantly deposits the problem of.
Therefore prior art has much room for improvement and developed.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of electric tornado flow photoelectricity that can remove tar removing and dust simultaneously The dizzy thick gas cleaning device of gasification of biomass and method.
The present invention technical solution be：
A kind of thick gas cleaning device of the dizzy gasification of biomass of electric tornado flow photoelectricity, including the electricity rotation for being made of metal and being grounded Wind reactor, the electric cyclone reactor include cylindrical upper cavity and coniform lower chamber, and on the cylindrical upper cavity Edge sets tangential thick gas inlet；
Cylindrical upper cavity is connected with clean fuel gas outlet, and the clean fuel gas outlet is connected with the cylindrical upper cavity One end insert in the cylindrical upper cavity；
Metal hollow electrode bar, the electrode bar and the electric cyclone reactor are placed in the electric cyclone reactor axis center There is insulating materials isolation at connected position；Described electrode bar one end stretches out outside the electric cyclone reactor and streamer corona plasma Power supply is connected；The other end is put in the electric cyclone reactor, and the one end for putting in the electric cyclone reactor is provided with power pole Gas enters more than 1 group of nozzle of the electric cyclone reactor, and every group of nozzle is containing 2-8 perpendicular to the straight of electrode bar arrangement Footpath is not less than 2mm outlet, and every group of nozzle preferably comprises 4 outlets；And it is jagged that 1 to 4 group is provided with the electrode bar Discharge tip, the discharge tip is perpendicular to the electrode bar axle center and is fixed in the shape of a spiral on the electrode bar.
The effect of nozzle is to provide passage into reactor for electrode gas, and electrode gas needs even dispersion in reactor, Can be according to actual conditions, the number of nozzle is The more the better, and based on electrode bar limited diameter of the present invention, jet expansion also has a scale Very little, too many jet expansion may be unfavorable for installing, therefore the nozzle quantity of the present invention is 2-8.
By the electric discharge of discharge tip, stable streamer can be produced in reactor, these streamers can to dust charged, To coke tar cracking, discharge tip is The more the better in principle, but excessively may result in：1) installing space is inadequate；2) energy consumption increases Add；Therefore the present invention is preferably 1-4 groups.
The lower of one end that the clean fuel gas outlet is inserted in the cylindrical upper cavity enters along face less than the thick combustion gas The lower distance for being not less than 10cm along face of gas port.
If the outlet of clean fuel gas is concordant or higher with fuel gas inlet pipe, thick combustion gas short circuit may be caused, do not existed Whirlpool is formed in reactor, is directly discharged from exit, does not reach the purpose of gas-purification.The clean fuel gas outlet insertion institute State the lower lower distance for being not less than 10cm along face along face less than the thick gas inlet of one end in cylindrical upper cavity；Can To ensure the situation of combustion gas short circuit does not occur.
The coniform lower chamber lower end connection ash bucket.
In the electric cyclone reactor ash bucket lower edge, ash discharging hole is set.
The material of the electrode bar is tungsten or stainless steel or copper.
The electrode gas is air, O2Or the one or more in vapor.
The discharge mode of the electrode bar can be any one in positive polarity or negative polarity streamer-discahrge.
A kind of thick gas-purification method of the dizzy gasification of biomass of electric tornado flow photoelectricity, comprises the following steps；
S1：The thick combustion gas of gasification of biomass tangentially enters electric whirlwind with 12-20m/s speed along electric cyclone reactor excircle Reactor；
S2：Streamer corona plasma power supply is connected positioned at the metal hollow electrode bar of the electric cyclone reactor axis center to enter Row point discharge, tar are cracked into CO, CH under the effect of streamer corona plasma4、H2、CO2Deng gas, dust is in reactor When by electric field force and centrifuge field force collective effect separated with combustion gas main body, accumulate in the dust collecting electrode of electric cyclone reactor, and Ash bucket further is fallen on down under gravity, to remove the dust in thick combustion gas.
Beneficial effects of the present invention：
1) property of free radical pyrolysis fuel oil under the conditions of living radical and streamer corona is produced using streamer corona discharge Can, the tar molecules in thick combustion gas is cracked into CO, H rapidly in streamer evolution2、CH4、CO2Deng micro-molecular gas.
2) ion pair dust charged caused by streamer corona field is utilized, and combines coupling of the electric field-centrifugal force field to dust Joint force realizes gas-solid be rapidly separated；Avoid dust from polymerizeing condensation in dust collecting electrode with tar, realize efficient removal dust.
3) tar purifying and dust are removed into two kinds of pollutant purification PROCESS COUPLINGs to carry out in single-reactor, saves equipment Cost of investment and operating cost, while realizing gasification of biomass thick combustion gas depth upgrading, improve CO, H of thick combustion gas2、CH4Contain Amount.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is electrode bar structural representation of the present invention；
Fig. 3 is Fig. 2 along A-A directions view；
Fig. 4 is electrode discharge cutting-edge structure schematic diagram
Fig. 5 is electrode bar assembling schematic diagram.
Description of reference numerals：1st, thick gas inlet；2nd, dust collecting electrode；3rd, electrode bar；4th, ash bucket；5th, clean fuel gas exports； 6th, electrode gas exports；7th, discharge tip；8th, electric cyclone reactor；9th, cylindrical upper cavity；10th, coniform lower chamber；11st, ash discharge Mouthful.
Embodiment
Refering to Fig. 1 to Fig. 5, a kind of thick gas cleaning device of the dizzy gasification of biomass of electric tornado flow photoelectricity, including by metal system Into and ground connection electric cyclone reactor 8, the electric inner surface of cyclone reactor 8 is the dust collecting electrode 2 of a ground connection.Electric cyclone reactor 8 It is preferred that it is made of stainless steel；The electric cyclone reactor 8 includes cylindrical upper cavity 9 and coniform lower chamber 10, and in cylinder The upper limb of upper cavity 9 sets tangential thick gas inlet 1；
Cylindrical upper cavity 9 be connected with clean fuel gas outlet 5, clean fuel gas outlet 5 be connected with cylindrical upper cavity 9 one End is inserted in cylindrical upper cavity 9；And the lower of one end in the cylindrical upper cavity 9 of insertion of clean fuel gas outlet 5 is less than slightly along face The lower distance for being not less than 10cm along face of gas inlet 1.
The coniform lower end of lower chamber 10 connects ash bucket 4；In the lower edge of ash bucket 4, ash discharging hole 11 is set.
Metal hollow electrode bar 3 is placed in the electric axis center of cyclone reactor 8, and the material of electrode bar 3 is preferably tungsten or stainless Steel or copper.
The position that the electrode bar 3 is connected with electric cyclone reactor 8 has insulating materials to isolate；Electricity rotation is stretched out in the one end of electrode bar 3 Wind reactor 8 is outer to be connected with streamer corona plasma power supply；The other end is put in electric cyclone reactor 8, and it is anti-to put in electric whirlwind One end of device 8 is answered to be provided with more than 1 group of the nozzle that power pole gas enters electric cyclone reactor 8, electrode gas is preferably air, O2Or One or more in vapor.
Every group of nozzle exports 6 containing 4 electrode gas of the diameter not less than 2mm perpendicular to electrode bar arrangement, and in electrode bar 3 The jagged discharge tip 7 of 1 to 2 group is provided with, the discharge tip 7 is perpendicular to the axle center of electrode bar 3 and is welded on electricity in the shape of a spiral On pole rod 3.The discharge mode of electrode bar 3 can be any one in positive polarity or negative polarity streamer-discahrge.
A kind of thick gas-purification method of the dizzy gasification of biomass of electric tornado flow photoelectricity, comprises the following steps；
S1：The thick combustion gas of gasification of biomass tangentially enters electricity rotation along the electric excircle of cyclone reactor 8 with 12-20m/s speed Wind reactor 8；
S2：Streamer corona plasma power supply is connected positioned at the metal hollow electrode bar 3 of the electric axis center of cyclone reactor 8 to carry out Point discharge, tar are cracked into CO, CH under the effect of streamer corona plasma4、H2、CO2Deng gas, when dust is in reactor Separated by electric field force and the collective effect for centrifuging field force with combustion gas main body, accumulate in the dust collecting electrode 2 of electric cyclone reactor 8, and Ash bucket 4 is further fallen on down under gravity, to remove the dust in thick combustion gas.
The vertical cross-section of thick gas inlet 1 is preferably rectangular, and the cross-sectional area size of rectangular inlet is with thick gas flow And temperature is relevant, preferably gas flow rate is 12-20m/s, and cylindrical upper cavity 9 connects coaxial cylindrical clean fuel gas outlet 5.
Using said apparatus, thick combustion gas is rapidly introduced into electric cyclone reactor 8 by thick gas inlet 1, in reactor In the presence of the streamer corona field formed between electrode bar 3 and reactor wall, background gas (such as O in thick combustion gas2、H2O, Or exported by electrode gas and introduce electrode gas) be ionized as cation, anion, electronics and various living radical groups, it is above-mentioned Plasma collides with the tar in thick combustion gas and makes the latter's prompt activation, and tar molecules are cracked into CO, H2、CH4、CO2 Deng micro-molecular gas.
Using said apparatus, the dust entered with thick combustion gas in electric cyclone reactor 8 is charged, in electric field force Moved under effect to dust collecting electrode 2；Also acted on by charged dust by centrifugation field force in electric cyclone reactor 8, dust is in electricity Separate with thick combustion gas main body under the collective effect of field force and centrifugation field force, constantly drawn close simultaneously to the dust collecting electrode 2 of electric cyclone reactor 8 Accumulation, then further falls on down ash bucket 4 under gravity.The thick combustion gas being cleaned is discharged from clean fuel gas outlet 5.
Embodiment 1：
Using fixed-bed gasification furnace, air gasification is carried out using wood chip as raw material, wood chip feeding quantity is 250kg/h, air stream Measure as 300Nm3/h。
Refering to accompanying drawing 1, the thick combustion gas that wood chip gasifies to obtain enters electric cyclone reactor by air inlet, and electrode bar uses 5 groups Nozzle, every group of nozzle export containing 4 electrode gas, and electrode gas uses O2, discharge tip set 2 groups, tar streamer corona etc. from CO, CH are cracked under son effect4、H2、CO2Deng gas, by electric field force and the common work of centrifugation field force when dust is in reactor Separated with combustion gas main body, accumulate in electric cyclone reactor inner surface, then enter ash bucket under gravity.
In this embodiment, the gasification gas main component of acquisition is CO, H2、CH4、CO2Deng.Through analysis, front and rear gasify is purified The main composition and content of gas are as shown in table 1, from table 1, using apparatus of the present invention, after thick gas-purification tar content from 2343mg/Nm3Drop to 93mg/Nm3, dust content is from 1256mg/Nm3Drop to 145mg/Nm3；And H2、CO、CH4Content Slightly rise, it can thus be appreciated that apparatus of the present invention while thick combustion gas is purified, also improve the content of fuel gas, combustion gas simultaneously Quality is significantly improved, and can be used as the unstripped gas of biomass-based liquid fuels process.
The front and rear composition of 1 thick gas-purification of table and content
Embodiment 2：
Using fixed-bed gasification furnace, air gasification is carried out using wood chip as raw material, wood chip feeding quantity is 250kg/h, air stream Measure as 300Nm3/h。
Refering to accompanying drawing 1, the thick combustion gas that wood chip gasifies to obtain enters electric cyclone reactor by air inlet, and electrode bar uses 5 groups Nozzle, every group of nozzle use O containing 1,4,8 electrode gas outlets (T1, T2, T3), electrode gas2, discharge tip is respectively provided with 2 Group, tar are cracked into CO, CH under the effect of streamer corona plasma4、H2、CO2Deng gas, by electricity when dust is in reactor The collective effect of field force and centrifugation field force separates with combustion gas main body, accumulates in electric cyclone reactor inner surface, then makees in gravity Enter ash bucket with lower.
In this embodiment, the gasification gas main component of acquisition is CO, H2、CH4、CO2Deng.Through analysis, front and rear gasify is purified The main composition and content of gas are as shown in table 2, from table 2, using the electrode bar that number nozzle is exported with Different electrodes gas, After invention device purifies thick combustion gas, tar content is from 2343mg/Nm3Drop to 280mg/Nm respectively3(T1), 93mg/Nm3 (T2)、73mg/Nm3(T3), dust content is from 1256mg/Nm3Drop to 165mg/Nm3(T1)、145mg/Nm3(T2)、125mg/ Nm3(T3)；And H2、CO、CH4Content combustion gas thicker than entrance slightly rises, it can thus be appreciated that the number of increase electrode gas outlet can Tar, the removal efficiency of dust are improved, and improves the content of fuel gas simultaneously, combustion gas quality is significantly improved.
Table 2 is using thick gas-purification Contrast on effect after Different electrodes gas outlet number
Embodiment 3：
Using fixed-bed gasification furnace, air gasification is carried out using wood chip as raw material, wood chip feeding quantity is 250kg/h, air stream Measure as 300Nm3/h。
Refering to accompanying drawing 1, the thick combustion gas that wood chip gasifies to obtain enters electric cyclone reactor by air inlet, and electrode bar uses 5 groups Nozzle, every group of nozzle export containing 4 electrode gas, and electrode gas uses O2, discharge tip sets 1 (T4), 2 (T2), 4 (T5) respectively Group, tar are cracked into CO, CH under the effect of streamer corona plasma4、H2、CO2Deng gas, by electricity when dust is in reactor The collective effect of field force and centrifugation field force separates with combustion gas main body, accumulates in electric cyclone reactor inner surface, then makees in gravity Enter ash bucket with lower.
In this embodiment, the gasification gas main component of acquisition is CO, H2、CH4、CO2Deng.Through analysis, front and rear gasify is purified The main composition and content of gas are as shown in table 3, net through invention device using different discharge tip group numbers, thick combustion gas from table 3 After change, tar content is from 2343mg/Nm3Drop to 192mg/Nm respectively3(T4), 93mg/Nm3(T2)、28mg/Nm3(T5), powder Dust content is from 1256mg/Nm3Drop to 277mg/Nm3(T4)、145mg/Nm3(T2)、39mg/Nm3(T5)；And H2、CO、CH4 Content combustion gas thicker than entrance slightly rises, it can thus be appreciated that increase discharge tip group number can improve the removal efficiency of tar, dust, And the content of fuel gas is improved simultaneously, combustion gas quality is significantly improved.
Table 3 is using thick gas-purification Contrast on effect after different discharge tip group numbers
Embodiment 4：
Using fixed-bed gasification furnace, air gasification is carried out using wood chip as raw material, wood chip feeding quantity is 250kg/h, air stream Measure as 300Nm3/h。
Refering to accompanying drawing 1, the thick combustion gas that wood chip gasifies to obtain enters electric cyclone reactor by air inlet, and electrode bar is used in axle Heart arrangement, containing 5 groups of nozzles, every group of nozzle exports containing 4 electrode gas, and electrode gas uses O2, 2 groups of discharge tip setting, Jiao Oil is cracked into CO, CH under the effect of streamer corona plasma4、H2、CO2Deng gas, when dust is in reactor by electric field force and The collective effect of centrifugation field force separates with combustion gas main body, accumulates in electric cyclone reactor inner surface, then enters under gravity Enter ash bucket (T2).
The thick combustion gas that wood chip gasifies to obtain enters electric cyclone reactor by air inlet, and electrode bar is using of the prior art non- Axis center arrangement, discharge tip are evenly arranged in escape pipe outside wall surface, and other conditions are same as described above, the combustion gas after processing Discharged (T6) by gas outlet.
In this embodiment, thick combustion gas is handled using Different electrodes rod arrangement, purifies main group of front and rear gasification gas Into and content it is as shown in table 4, from table 4, using 2 kinds of electrode bar arrangements by after thick gas-purification, tar content from 2343mg/Nm3Drop to 93mg/Nm respectively3(T2)、2129mg/Nm3(T6), dust content is from 1256mg/Nm3Drop to 145mg/Nm3(T2)、658mg/Nm3(T6)；And H is remarkably improved using axis center arrangement electrode bar mode2、CO、CH4Contain Amount, it can thus be appreciated that the thick gas-purification of axis center arrangement electrode bar mode and upgrading positive effect are better than non-axis center arrangement side Formula.
Table 4 uses the thick gas-purification Contrast on effect of Different electrodes rod arrangement
Above-listed detailed description is illustrating for possible embodiments of the present invention, and the embodiment simultaneously is not used to limit this hair Bright the scope of the claims, all equivalence enforcements or change without departing from carried out by the present invention, it is intended to be limited solely by the scope of the claims of this case.

Claims (8)

  1. The thick gas cleaning device of gasification of biomass 1. a kind of electric tornado flow photoelectricity is swooned, it is characterised in that：
    Including the electric cyclone reactor for being made of metal and being grounded, the electric cyclone reactor includes cylindrical upper cavity and coniform Lower chamber, and tangential thick gas inlet is set in the cylindrical upper cavity upper limb；
    Cylindrical upper cavity is connected with clean fuel gas outlet, and the clean fuel gas exports one to be connected with the cylindrical upper cavity End is inserted in the cylindrical upper cavity；
    Metal hollow electrode bar is placed in the electric cyclone reactor axis center, the electrode bar is connected with the electric cyclone reactor Position have insulating materials isolation；Described electrode bar one end stretches out outside the electric cyclone reactor and streamer corona plasma power supply It is connected；The other end is put in the electric cyclone reactor, and the one end for putting in the electric cyclone reactor is entered provided with power pole gas Enter more than 1 group of nozzle of the electric cyclone reactor, every group of nozzle containing the 2-8 diameters perpendicular to electrode bar arrangement not Outlet less than 2mm, and the jagged discharge tip of 1 to 4 group is provided with the electrode bar, the discharge tip is perpendicular to described Electrode bar axle center is simultaneously fixed on the electrode bar in the shape of a spiral.
  2. The thick gas cleaning device of gasification of biomass 2. electric tornado flow photoelectricity according to claim 1 is swooned, it is characterised in that：Institute State the lower lower edge along face less than the thick gas inlet of one end that clean fuel gas outlet is inserted in the cylindrical upper cavity Face is not less than 10cm distance.
  3. The thick gas cleaning device of gasification of biomass 3. electric tornado flow photoelectricity according to claim 1 is swooned, it is characterised in that：Institute State coniform lower chamber lower end connection ash bucket.
  4. The thick gas cleaning device of gasification of biomass 4. electric tornado flow photoelectricity according to claim 3 is swooned, it is characterised in that： The ash bucket lower edge sets ash discharging hole.
  5. The thick gas cleaning device of gasification of biomass 5. the electric tornado flow photoelectricity according to Claims 1 to 4 any one is swooned, its It is characterised by：The material of the electrode bar is tungsten or stainless steel or copper.
  6. The thick gas cleaning device of gasification of biomass 6. the electric tornado flow photoelectricity according to Claims 1 to 4 any one is swooned, its It is characterised by：The electrode gas is air, O2Or the one or more in vapor.
  7. The thick gas cleaning device of gasification of biomass 7. the electric tornado flow photoelectricity according to Claims 1 to 4 any one is swooned, its It is characterised by：The discharge mode of the electrode bar can be any one in positive polarity or negative polarity streamer-discahrge.
  8. A kind of thick gas-purification method of gasification of biomass 8. electric tornado flow photoelectricity is swooned, it is characterised in that：Comprise the following steps：
    S1：The thick combustion gas of gasification of biomass tangentially enters electric whirlwind along electric cyclone reactor excircle with 12-20m/s speed and reacted Device；
    S2：Streamer corona plasma power supply, which is connected, positioned at the metal hollow electrode bar of the electric cyclone reactor axis center carries out point End electric discharge, tar are cracked into CO, CH under the effect of streamer corona plasma4、H2、CO2Gas, when dust is in reactor by Separated to electric field force and the collective effect for centrifuging field force with thick combustion gas main body, accumulate in the dust collecting electrode of electric cyclone reactor, and Ash bucket further is fallen on down in the presence of gravity, to remove the dust in thick combustion gas.
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