CN107841325A - A kind of method that high grey paper mill sludge pyrolysis of biomass blending prepares synthesis gas - Google Patents
A kind of method that high grey paper mill sludge pyrolysis of biomass blending prepares synthesis gas Download PDFInfo
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- CN107841325A CN107841325A CN201710865120.1A CN201710865120A CN107841325A CN 107841325 A CN107841325 A CN 107841325A CN 201710865120 A CN201710865120 A CN 201710865120A CN 107841325 A CN107841325 A CN 107841325A
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- Prior art keywords
- biomass
- pyrolysis
- sludge
- gas
- fine powder
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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
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/18—Modifying the properties of the distillation gases in the oven
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The invention discloses the method that a kind of high grey paper mill sludge pyrolysis of biomass blending prepares synthesis gas.This method comprises the following steps：It is 13 according to mass ratio by biomass and sludge respectively through drying and smashing is sieved to obtain biomass fine powder and sludge fine powder：1 takes biomass fine powder and sludge fine powder to mix, and is sealed standby；Mixing fine powders are placed in feeder, it is continually fed into pyrolysis carrier gas, air in system to be drained, open tube furnace sets target temperature, after in-furnace temperature rises to target temperature, mixing fine powders in feeder are transferred in reactor, mixing fine powders heat up in reactor and are pyrolyzed, and produce non-condensable gas, tar and biological semicoke；After pyrolysis gas is discharged from reactor, successively after condensing unit, gas cleaning plant, stored after drying.The inventive method can not only improve the factor of created gase of synthesis gas in pyrolysis, and reduce the yield of biological tar in pyrolysis.
Description
Technical field
The present invention relates to industrial solid castoff processing and recycling field, and in particular to a kind of high ash of biomass blending
The method that paper mill sludge pyrolysis prepares synthesis gas.
Background technology
China is Chinese herbal medicine production and consumption state maximum in the world now, and it is super to have more than 1500 medicine enterprise productions every year
Cross 1,005,000,000 tons of discarded Chinese medicine slags.Traditional discarded Chinese medicine slag processing mode relies primarily on direct landfill, so on the one hand
Environmental pollution is serious, still there is some drugs residual in the dregs of a decoction, easily causes the pollution of underground water and produces pungent gas, separately
On the one hand it is also a kind of waste of resource.How the utilization of clean and effective discards Chinese medicine slag into urgently to be resolved hurrily important
Problem.
Paper mill sludge is a kind of Main By product of paper industry, includes water, fiber, organic compound, inorganic salts and nothing
Machine filler.Content of ashes is up to 50%~70% in sludge, and main component includes the metallic elements such as calcium, magnesium, sodium, aluminium, tradition
Processing method is based on directly filling, and the serious pollution to soil reclamation is not only not environmentally but also uneconomical.
Pyrolytic gasification is considered as the technology that a kind of promising carbon-rich solids discarded object of richness is converted into clean gas, by
To extensive concern.Studies have found that fuel gases calorific value is in 5000kJ/Nm caused by the gasification of Chinese medicine slag3More than, show that Chinese medicine slag has
There is good gasification application potential.But biomass caused a large amount of tar in pyrolysis are still one and pyrolytic gasification are answered
Huge challenge, tar below dew point can be condensed in pipeline, excessive tar easily corrosion and block fuel conduit,
Filter and upstream device.How to solve the problems, such as in pyrolytic gasification that aerogenesis tar content is too high turns into current gasification and grinds
The focus studied carefully.Traditional tar minimizing technology has the appropriate of spray process, bubbling immersion method, dry filter method and several method
Combination, these belong to physical cleaning, can not really remove tar removing.The content of tar in combustion gas is reduced with catalystic pyrolysis
It is current most effective, state-of-the-art method, catalytic pyrolysis is in high temperature or under conditions of catalyst being present, by Jiao of macromolecular
Oil-breaking turns into various micro-molecular gas (such as hydrogen, carbon monoxide, methane, carbon dioxide), in large and medium-sized gasification furnace
Gradually it is used.Currently used tar catalyst includes nickel-base catalyst, base metal catalysts, ore catalyst etc., greatly
Quantity research shows that the presence of alkali metal and alkaline earth metal has obvious catalytic action to biomass coke tar.If in Chinese medicine
The high grey paper mill sludge rich in alkali metal and alkaline earth metal is added in the pyrolytic gasification of slag, at high temperature the alkali in sludge
Metal and alkali earth metal have been catalyzed the cracking conversion of tar significantly, macromolecular coke tar cracking is turned into micro-molecular gas, and one
Aspect reduces tar yield, while also improves the gas yield in copyrolysis.
The content of the invention
For deficiency of the prior art, it is an object of the invention to provide a kind of high grey paper mill sludge of biomass blending
The method that pyrolysis prepares synthesis gas, can not only improve the factor of created gase of synthesis gas in pyrolysis, and reduce biological tar in pyrolysis
Yield.
To solve prior art problem, the technical scheme that the present invention takes is：
A kind of method that high grey paper mill sludge pyrolysis of biomass blending prepares synthesis gas, comprises the following steps：
Step 1, by biomass and sludge respectively through dry and smash sieve particle diameter be 0.2-0.45mm biomass it is thin
Powder and particle diameter are less than 0.125mm sludge fine powder, are 1-3 according to mass ratio：1 takes biomass fine powder and sludge fine powder to mix, close
Envelope saves backup；
Step 2, mixing fine powders are placed in feeder, pyrolysis carrier gas, the row for the treatment of is continually fed into 150ml/min speed
Air to the greatest extent in system, opens 500-900 DEG C of tube furnace sets target temperature, after in-furnace temperature rises to target temperature, will feed
Mixing fine powders in device are transferred in reactor, and mixing fine powders heat up in reactor and are pyrolyzed, produce pyrolysis gas, tar and
Biological semicoke；
Step 3, after pyrolysis gas is discharged from reactor, successively after condensing unit, gas cleaning plant, dry simultaneously
Input set airbag, you can.
It is that the mass ratio of biomass fine powder and sludge fine powder is 3 in step 1 as improved：1.
It is that the biomass described in step 1 is a kind of Chinese medicine slag as improved, sludge raw material is to be produced in paper-making process
Raw high grey sludge.
It is that it is nitrogen that carrier gas is pyrolyzed in step 2 as improved.
It is that the target temperature that tubular type road is set in step 2 is 900 DEG C as improved.
It is that the cooling medium of the condensing unit described in step 3 is mixture of ice and water as improved；The gas is net
Disguise the purification medium put to be made up of water, glass fiber filter and discoloration silica gel.
Beneficial effect：
1st, the present invention is proposed biomass and paper mill sludge altogether to prepare the method for synthesis gas.It is anti-in fixed bed
The pyrolysis that biomass and paper mill sludge are carried out in device is answered, it is right using the ash content that alkalies and alkaline earth is largely rich in sludge
Caused tar has certain catalytic action in biomass pyrolytic, reduces the yield of tar in thermal decomposition product；
2nd, the inventive method is not on the premise of extra means are increased, by the blending of high grey paper mill sludge to reducing
Tar yield in biomass pyrolysis process, it is micro-molecular gas by macromolecular tar conversion, improves the synthesis of unit raw material
Gas yield；
3rd, the inventive method effectively make use of two kinds of trade wastes of Chinese medicine slag and paper mill sludge, realize Chinese medicine slag
Minimizing with sludge utilizes, and alleviates the processing pollution on the environment of Chinese medicine slag and sludge.
Brief description of the drawings
Fig. 1 is that the system and device used in synthesis gas is prepared in the embodiment of the present invention, wherein, 1- pyrolysis carrier gas tanks, 2- chargings
Device, 3- tube furnaces, 4- reactors, 5- condensing units, 6- gas cleaning plants, 7- gas driers, 8- gas collections dress
Put.
Embodiment
The present invention is further described in detail below by specific embodiment.
The present invention is using the Chinese medicine slag of Henan Chinese patent drug factory and the paper mill sludge in Shandong paper mill as raw material, and centering
The dregs of a decoction and paper mill sludge carry out Industrial Analysis and elementary analysis, as a result respectively as shown in Table 1 and Table 2.
The Industrial Analysis of the Chinese medicine slag of table 1 and elementary analysis table
The Industrial Analysis and elementary analysis of the paper mill sludge of table 2
Embodiment 1
According to package system shown in Fig. 1.
A kind of method that high grey paper mill sludge pyrolysis of biomass blending prepares synthesis gas, comprises the following steps：
Step 1, by biomass and sludge respectively through dry and smash sieve particle diameter be 0.2-0.45mm biomass it is thin
Powder and particle diameter are less than 0.125mm sludge fine powder, are 3 according to mass ratio：1 takes biomass fine powder and sludge fine powder to mix and must mix
Fine powder is closed, is sealed standby；
Step 2, mixing fine powders are placed in feeder, open nitrogen gas cylinder, adjust pressure valve, control pressure exists
0.1MPa, the flow velocity for controlling nitrogen are 150ml/min, the air in gas circuit to be drained, open tube furnace sets target temperature
900 DEG C, after in-furnace temperature rises to target temperature, the mixing fine powders in feeder are transferred in quartz reactor, mixing fine powders
It is rapidly heated and is pyrolyzed in reactor, produces non-condensable gas, tar and semicoke；
Step 3, after pyrolysis gas is discharged from reactor, gas collection is entered after condensing unit, gas cleaning plant successively
In bag, you can.
Wherein condensing unit controls condensation temperature by mixture of ice and water, when the tar in pyrolysis gas passes through condensing unit
The isopropanol being condensed in device absorbs；
Gas cleaning plant can remove a small amount of uncooled tar and moisture remained in pyrolysis gas.
The component and content of gas in collection airbag are detected, as a result as shown in table 3.
Gas component table prepared by the embodiment 1 of table 3
Control group is：Under similarity condition, the biomass fine powder and sludge fine powder of equal quality, obtained gas is pyrolyzed respectively
The weighted average of body content.
As a result show, hydrogen yield is more individually pyrolyzed raising 18.4%, and carbon monoxide yield is more individually pyrolyzed raising
35.2%, methane production is more individually pyrolyzed raising 18.9%, and yield of carbon dioxide is more individually pyrolyzed raising 71.3%, total aerogenesis
Rate is 0.309Nm3/ kg, relatively individually pyrolysis lifting 32.0%, tar yield 8.8g/kg, relatively independent pyrolysis reduce by 16.0%.
Embodiment 2
In addition to the temperature on tubular type road in step 2 is set as 700 DEG C, remaining is the same as embodiment 1.
The synthesis gas componentses prepared to embodiment 2 detect, and data are as shown in table 4.
Gas component table prepared by the embodiment 2 of table 4
Control group is：Under similarity condition, the biomass fine powder and sludge fine powder of equal quality, obtained gas is pyrolyzed respectively
The weighted average of body content.
As a result show, hydrogen yield is more individually pyrolyzed raising 29.6%, and carbon monoxide yield is more individually pyrolyzed reduction
3.0%, methane production is more individually pyrolyzed reduction by 14.2%, and yield of carbon dioxide is more individually pyrolyzed raising 15.5%, total aerogenesis
Rate is 0.128Nm3/ kg, relatively individually pyrolysis lifting 9.6%, tar yield 31.4g/kg, relatively independent pyrolysis reduce by 20.9%.
Embodiment 3
Except the mass ratio of biomass fine powder and sludge fine powder is 1：1, remaining is the same as embodiment 1.
The synthesis gas componentses prepared to embodiment 3 detect, and data are as shown in table 5.
Gas component table prepared by the embodiment 3 of table 5
Control group is：Under similarity condition, the biomass fine powder and sludge fine powder of equal quality, obtained gas is pyrolyzed respectively
The weighted average of body content.
As a result show, hydrogen yield is more individually pyrolyzed raising 29.0%, and carbon monoxide yield is more individually pyrolyzed raising
64.7%, methane production is more individually pyrolyzed reduction by 24.5%, and yield of carbon dioxide is more individually pyrolyzed raising 64.3%, total aerogenesis
Rate is 0.295Nm3/ kg, relatively individually pyrolysis lifting 49.6%, tar yield 4.6g/kg, relatively independent pyrolysis reduce by 34.2%.
In from the above as can be seen that by biomass and paper mill sludge altogether to prepare the method for synthesis gas.Solid
Carry out the pyrolysis of biomass and paper mill sludge in fixed bed reactor, using in sludge largely rich in alkalies and alkaline earth
Ash content, there is certain catalytic action for caused tar in biomass pyrolytic, reduce the production of tar in thermal decomposition product
Rate.
In addition, the invention is not restricted to above-mentioned embodiment, as long as in without departing from the scope of the present invention, can take each
Kind mode implements the present invention.
Claims (6)
1. a kind of method that high grey paper mill sludge pyrolysis of biomass blending prepares synthesis gas, it is characterised in that comprise the following steps：
Step 1, by biomass and sludge respectively through dry and smash sieve particle diameter be 0.2-0.45mm biomass fine powder and particle diameter
Sludge fine powder less than 0.125mm, it is 1-3 according to mass ratio：1 takes biomass fine powder and sludge fine powder to mix, and is sealed standby
With；Step 2, mixing fine powders are placed in feeder, pyrolysis carrier gas are continually fed into 150ml/min speed, in system to be drained
Air, 500-900 DEG C of tube furnace sets target temperature is opened, will be mixed in feeder after in-furnace temperature rises to target temperature
Close fine powder to be transferred in reactor, mixing fine powders heat up in reactor and are pyrolyzed, and produce non-condensable gas, tar and biology half
It is burnt；Step 3, after pyrolysis gas is discharged from reactor, successively after condensing unit, gas cleaning plant, simultaneously input set is dried
Airbag, you can.
2. the method that a kind of high grey paper mill sludge pyrolysis of biomass blending according to claim 1 prepares synthesis gas, it is special
Sign is that the mass ratio of biomass fine powder and sludge fine powder is 1-3 in step 1：1.
3. the method that a kind of high grey paper mill sludge pyrolysis of biomass blending according to claim 1 prepares synthesis gas, it is special
Sign is that the biomass described in step 1 is a kind of Chinese medicine slag, and sludge raw material is the caused grey sludge of height in paper-making process.
4. the method that a kind of high grey paper mill sludge pyrolysis of biomass blending according to claim 1 prepares synthesis gas, it is special
Sign is that it is nitrogen that carrier gas is pyrolyzed in step 2.
5. the method that a kind of high grey paper mill sludge pyrolysis of biomass blending according to claim 1 prepares synthesis gas, it is special
Sign is that the target temperature that tube furnace is set in step 2 is 900 DEG C.
6. the method that a kind of high grey paper mill sludge pyrolysis of biomass blending according to claim 1 prepares synthesis gas, it is special
Sign is that the cooling medium of the condensing unit described in step 3 is mixture of ice and water；The purification medium of the gas cleaning plant
It is made up of water, glass fiber filter and discoloration silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710865120.1A CN107841325B (en) | 2017-09-22 | 2017-09-22 | Method for preparing synthesis gas by pyrolyzing biomass-blended high-ash papermaking sludge |
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| CN201710865120.1A CN107841325B (en) | 2017-09-22 | 2017-09-22 | Method for preparing synthesis gas by pyrolyzing biomass-blended high-ash papermaking sludge |
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| CN107841325B CN107841325B (en) | 2020-06-02 |
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Cited By (5)
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| CN109135785A (en) * | 2018-10-10 | 2019-01-04 | 辽宁科技大学 | A kind of method of sludge and biomass copyrolysis processing activated sludge |
| CN110724547A (en) * | 2019-04-10 | 2020-01-24 | 湖南顶立科技有限公司 | Method for drying and pyrolyzing sludge and medicine residues cooperatively |
| CN111777309A (en) * | 2020-06-28 | 2020-10-16 | 华中师范大学 | Sludge treatment method capable of reducing discharge |
| CN111995210A (en) * | 2020-07-29 | 2020-11-27 | 华中师范大学 | Method for preparing combustible gas by co-pyrolysis of sludge and biomass |
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