CN108795454A - Being pre-processed using biogas slurry stack retting improves the method for stalk pyrolytic gasification combustion gas quality and gasification efficiency - Google Patents
Being pre-processed using biogas slurry stack retting improves the method for stalk pyrolytic gasification combustion gas quality and gasification efficiency Download PDFInfo
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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
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- 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 methods pre-processing improvement stalk pyrolytic gasification combustion gas quality and gasification efficiency using biogas slurry stack retting, natural air drying corn straw smashing is taken to be sieved, by solid-to-liquid ratio (i.e. the ratio between stalk quality (kg) and biogas slurry volume (L)) 1:9~2:3 addition biogas slurries simultaneously mix, and are made into the material of relative humidity 90~60%；Mixed material is added in the urea of stalk quality 1~2%, it is 25~30 to make mixed system C/N；Mixed material container is sealed, 25~35 DEG C of temperature, stands 1~4d；Pretreated material is taken out and is separated by solid-liquid separation, solid dry stalk powder is placed in gasification furnace and gasifies, collect gasification burning in gasification furnace tail portion.Compared to former stalk, straw gasification gas calorific value improves 0.35~1.93MJ/Nm after pretreatment3, 3.03~3.47g/Nm of tar reduction3, gasification efficiency improves 8.64%~17.13%, with preferable industrial feasibility.
Description
Technical field
The invention belongs to field of new energy technologies, and in particular to a kind of to improve stalk pyrolysis gas using the pretreatment of biogas slurry stack retting
Change the method for combustion gas quality and gasification efficiency.
Background technology
Biomass energy is the fourth largest source after coal, oil, natural gas.China's biomass resource is abundant, utilizes side
Formula is various：First, thermochemical study technology, obtains the high-grades energy products such as charcoal, bio oil and biomass gasification burning, it should
Method can be divided into high-temperature retorting, pyrolysis liquefaction, pyrolytic gasification and hydrothermal liquefaction etc. by operating method difference again；Second is that bioid
Conversion method is learned, refers mainly to biomass under the fermentation of microorganism, is formed methane, the energy products such as ethyl alcohol；Third, chemistry turns
Change technology prepares biodiesel using esterification process；Fourth, combustion technology, including cooking stove combustion technology, boiler combustion technology, compression
Forming technique etc..In recent years, the environmental problems such as haze are paid much attention to by government, and energy resource structure changes extremely urgent, cleaning combustion
Gas is in great demand.From technology development and application angle, pyrolytic gasification prepares biomass gasification burning just gradually by extensive
Concern and attention.
Pyrolytic gasification is a kind of modernization biomass utilization method, can be fast and efficiently by low-grade stalk etc.
Biomass material is converted into high-grade biomass gasification burning.At this stage in the research of pyrolytic gasification technology and Commercial cultivation mistake
Cheng Zhong, there are fuel gases calorific values it is low, tar content is high and gasification efficiency is low the problems such as, problem above can optimize from Biomass Characteristics
(biomass pretreatment), novel gasifying device are researched and developed and several aspects such as gasification process exploitation are overcome.Wherein, biomass is pre-
Treatment technology can be in source optimizing raw material characteristic, the most effectively, and research is relatively broad.Currently, pyrolytic gasification process biology
Matter preconditioning technique mainly has dry, pyrolysis, molding and bakes.Mississippi, America founds university Jin Hu etc. and points out, dry
Pre-process the most commonly used, moisture content can usually be down to 10%-15% to biomass after drying.But pretreated sample easily by
It makes moist again to the influence of external environment, and biomass itself low energy densities and bulk density, not easy grinding, elevated oxygen level
Etc. characteristics do not improved yet, gasification property improve unobvious.Table is assessed in the calculating such as the Ayla Uslu of Dutch Utrecht university
Bright, the treatment effeciency of biomass pyrolytic, molding and baking preconditioning technique is respectively 64%, 84% and 94%, handles life per ton
Expense needed for substance is respectively the euro of 75-104,54 and 58, and three kinds of Technical comparings, baking preconditioning technique has good advantage.
Zhejiang University Chen Qing etc. can make biomass deep dehydration studies have shown that baking pretreatment, and lignocellulosic structure is broken
Bad, the raising and oxygen content for being conducive to raw material energy density reduce, and this method can improve the quality of synthesis gas to a certain extent
And gasification efficiency.But baking pretreatment can be such that original biomass volatile matter part is precipitated, and cause larger energy loss, bake solid
The gasification efficiency of body product is less than the gasification efficiency of initial material.Therefore, new and effective and inexpensive biomass pyrolytic is developed
Gasification preconditioning technique is necessary.
Biogas slurry is the residual liquid after anaerobic fermentation, its application at present focuses mostly in fertilizer use and feed addictive.But biogas slurry
Using there are some problems, such as antibiotic in biogas slurry to cause potential hazard to environment and health, thus it is novel
Biogas slurry utilization ways are urgently developed.Biogas slurry is rich in a variety of enzymes and fermentative microorganism, and the stack retting that can be used for the biomass such as stalk is located in advance
Reason.Agricultural University Of Shenyang Lee builds etc. in article《Response phase method optimizes the research of biogas slurry pretreatment maize straw condition》In point out,
Biogas slurry pre-processes the crystallinity for significantly reducing stalk cellulose, and is found by scanning electron microscope, and pretreatment destroys stalk table
Layer structure, hole increase.The V.Kirubakaran etc. of India Gandhigram Rural University points out, biomass knot
Structure there is larger impact, high porosity can promote the lasting progress of gasification reaction its gasification property, improve gasification property.Beijing
University of chemical technology Fang Wenjie is in paper《The experimental study and Discussion of Mechanism for improving Anaerobic Digestion of Straw gas production are pre-processed by stack retting
It begs for》In point out, the pretreatment of biogas slurry stack retting can destroy lignocellulosic structure, and degrade partial lignin and hemicellulose.Eastern China
University Li Meng is clean equal in article《Biogas slurry pre-processes the influence to rose stalk anaerobic fermentation biogas production characteristics》It is explicitly pointed out in one text,
Biogas slurry is pre-processed to the fibre fractionation degradation effect of stalk clearly, and the total degradation rate of lignocellulosic is 9.36~
22.10%.The Bao Zhenbo of TanJin Agricultural College points out that tar is mainly the pyrolysis product of cellulose, hemicellulose and lignin.Cause
This, judges according to above-mentioned literature research achievement, and biogas slurry pretreatment can destroy stalk surface structure, reduce cellulose crystallity, make
It is easier that cracking gasification reaction occurs, and helps to reduce the content of follow-up pyrolysis gas chemical industry skill by-product tar, from source
Reduce secondary pollution risk.The stack retting technology of stalk develops in recent years to reach its maturity, but generally use decomposition agent or quick rotting agent, and
It is mainly used in compost returning to the field.The pretreatment of biogas slurry stack retting is also in the laboratory research stage, and frequently as anaerobic fermentation methane phase
Pre-treatment.So far, biogas slurry stack retting pre-processes the pretreating process there is not yet as stalk pyrolytic gasification.
The pretreatment of biogas slurry stack retting is used as a kind of Biological Pretreatment Techniques, basic cost free input to be not necessarily to special installation and behaviour
Make simply, there is preferable popularizing application prospect.The pretreated application of biogas slurry stack retting is to promoting the industry of pyrolytic gasification technique to push away
It is wide that there is good effect.Biogas slurry stack retting is pre-processed and is combined with pyrolytic gasification technique, and this combination is to stalk
Pyrolytic gasification combustion gas quality and gasification efficiency improvement produce advantageous effect, are the innovative places of the present invention.The biology of preparation
Matter gasification burning can be used for resident's cooking, heating and industrial combustion gas boiler heat supplying or power generation.
Invention content
Improving stalk pyrolytic gasification combustion gas quality and gasification efficiency using the pretreatment of biogas slurry stack retting the present invention provides a kind of
Method.By this biologic pretreatment method of biogas slurry stack retting, the macromolecular structure and Organic structure of stalk are destroyed, is effectively improved
Pyrolytic gasification fuel gases calorific value reduces gasification tar content, improves gasification efficiency.Solves existing pyrolytic gasification preconditioning technique energy
The problems such as consumption is high, of high cost, efficiency is low.Most extensive, the cheapest air of cost is unlimited as gasifying agent using commercial Application for this method
Gasification furnace form processed, easy to operate, the biomass gasification burning of preparation can be directly used for resident's cooking, heating and industrial combustion gas pot
Stove combustion heat supplying or power generation are suitble to large-scale promotion application.
Realize that technical scheme of the present invention is summarized as follows：
A method of being pre-processed using biogas slurry stack retting improves stalk pyrolytic gasification combustion gas quality and gasification efficiency, including step
Suddenly：
1) mechanical crushing：The maize straw for taking natural air drying, is crushed and is sieved with pulverizer, is less than the straw of 0.9mm grain sizes
Stalk is pre-processed for biogas slurry stack retting；
2) biogas slurry is added：Maize straw after taking step 1) to pulverize and sieve is according to solid-to-liquid ratio 1:9~2:Natural pond is added in 3 ratio
Liquid, solid-to-liquid ratio herein is the quality (kg) of natural air drying maize straw and volume (L) ratio of added biogas slurry.By stalk and biogas slurry
It is uniformly mixed, is configured to the stack retting material of relative humidity 90~60%；
The biogas slurry is solid-liquid point after the completion of liquid effluent or the stack retting pretreatment of the anaerobic fermentation engineering of normal operation
Liquid product from after；
3) nutrition adjustment：Take step 1) pulverize and sieve rear maize straw quality 1~2% urea be added step 2) mixing
It in stack retting material, and stirs evenly so that the C/N of mixed system reaches 25~30；
4) it is sealed：Container equipped with mixed material is capped or overlay film sealing, 25~35 DEG C of temperature stand 1~4d；
25~35 DEG C of realizations of the temperature can be, but not limited to water-bath, thermostatic chamber, constant-temperature table etc..
5) it dries and gasifies：The material that the pretreatment of step 4) stack retting finishes is taken out, is separated by solid-liquid separation, and solid is set
It dries to obtain stalk powder in 100~110 DEG C of baking ovens.It collection is obtained stalk powder is placed in gasification furnace to gasify, in gasification furnace
The gasification burning that tail portion collection and purification obtain.
Described be separated by solid-liquid separation includes but not limited to centrifugation, vacuum pump suction filtration, manual squeezing etc..
The liquid that is separated by solid-liquid separation can continue on for the stalk biogas slurry stack retting pretreatment of other batches.
The gasification furnace includes but not limited to fixed-bed gasification furnace, tube furnace etc..
The gasification furnace gasification temperature is 800 DEG C, but can be adjusted in actual application, as long as may be implemented
Gasifying stalk.
Compared with prior art, of the invention to reach following advantageous effect：
(1) proposed by the present invention pre-processed using biogas slurry stack retting improves stalk pyrolytic gasification combustion gas quality and gasification efficiency
Method, it is easy to operate, it is of low cost.As shown in Figure 1, basic operational steps include mechanical crushing, biogas slurry addition, nutrition adjustment,
Closed to preserve, be separated by solid-liquid separation, dry and gasify, whole process has preferable commercial Application valence without waste and pollutant emission
Value；
(2) biogas slurry stack retting pretreatment proposed by the present invention improves straw gasification gas calorific value, tar content and gasification efficiency
Principle be that the apparent structure of stalk and Organic structure are changed after pretreatment.As shown in figure 3, biogas slurry stack retting is located in advance
The surface structure of stalk is destroyed after reason, and fibre structure caves in, and porosity increases, this helps to reinforce mass transfer in gasification reaction
Heattransfer effect improves stover rate.As shown in figure 4, compared with former stalk, stalk is in 2 θ of the angle of diffraction after the pretreatment of biogas slurry stack retting
It is deviated to the right for the diffraction maximum of 22o or so, the fibre structure of stalk occurs crystallization and redirects, the cellulose crystallity being calculated
It is 0.36, hence it is evident that less than the 0.43 of former stalk, illustrate to consume portion of cellulose in biogas slurry stack retting preprocessing process, contribute to
Source reduces the tar content in gasification；
(3) the biogas slurry stack retting pretreated straw gasification burning calorific value prepared by the present invention is 5.90~7.48MJ/Nm3, just
Beginning tar content is 2.94~3.38g/Nm3, gasification efficiency is 63.51~72%.The gasification burning of original stalk is not pre-processed
Calorific value is 5.55MJ/Nm3, tar content 6.41g/Nm3, gasification efficiency 54.87%.Compared to non-pretreated straw, biogas slurry heap
Macerating pretreatment can make straw fuel gas calorific value improve 0.35~1.93MJ/Nm3, 3.03~3.47g/Nm of tar content reduction3, reduce
Amplitude reaches 47.27~54.13%, and gasification efficiency improves 8.64%~17.13%；
(4) gasification burning after biogas slurry stack retting pretreatment proposed by the present invention prepared by stalk can be directly used for boiler combustion
It generates steam and generates electricity, environmental protection, efficient and better economy have preferable industrial feasibility.
Description of the drawings
The process flow charts of Fig. 1 to realize the present invention.
Fig. 2 is a kind of downdraft fixed-bed gasification furnace gasification flow chart that the present invention may be implemented；
1- feed inlets, 2- gasification furnaces, 3- quartz sand beds, 4- asbestos, 5- nitrogen, 6- pressure reducing valves, 7- check valves, 8- mass
Flowmeter, the first preheaters of 9-, 10- air compressors, 11- valves, 12- flowmeters, the second preheaters of 13-, the preheating of 14- thirds
Device, 15- B-grade condensation systems, 16- absorbent cotton filters, 17- wet gas flow meters, 18- Bibulous Silica Gels, 19- sample points,
20- gas storage holders.
Fig. 3 is the scanning electron microscope (SEM) photograph of the front and back stalk of biogas slurry stack retting pretreatment.
Fig. 4 is the X-ray diffractogram of the front and back stalk of biogas slurry stack retting pretreatment.
Specific implementation mode
Invention is further described with reference to specific embodiment, but the present invention is not imposed any restrictions.Implement
The means used in example use this field conventional means unless otherwise instructed.
Embodiment 1.
(1) biogas slurry stack retting pre-processes：The natural air drying maize straw that 1kg pulverizes and sieves is weighed, is placed in 20L wide-mouth bottles,
9L biogas slurry (solid-to-liquid ratios 1 are added:9) so that mixed material relative humidity is 90%；20g urea, adjustment pretreatment system C/ is added
N is 25；Mixing pretreatment system is stirred evenly, with rubber stopper seal, 1d is stood in 35 DEG C of water-baths；By mixed system corn stalk
Stalk takes out, and vacuum pump, which is filtered to without apparent drop, to flow out, and maize straw after suction filtration is placed in 105 DEG C of baking ovens and dries to obtain straw powder
End.Basic operation flow is as shown in Fig. 1.Pretreatment is shown in Table 1 with biogas slurry property.The front and back maize straw scanning electron microscope of pretreatment and
X-ray diffractogram is shown in attached drawing 3 and attached drawing 4 respectively.As shown in figure 3, former stalk surface texture is fine and close, flat smooth, and biogas slurry heap
The surface structure for macerating stalk after pre-processing destroys, rough surface, rises and falls apparent, and fibre structure caves in, and porosity increases；Such as Fig. 4
Shown, former stalk is that 21.47o apparent diffraction maximum occurs in 2 θ of the angle of diffraction, and the fibre crystallinity of stalk is 0.43；Biogas slurry stack retting is pre-
Stalk is that 21.79o diffraction maximum occurs in 2 θ of the angle of diffraction after processing, and the fibre crystallinity of stalk is 0.36.
The pretreatment biogas slurry property of table 1
(2) gasifying stalk and collection of products after pre-processing：It sets and 2 fixed-bed gasification furnace of attached drawing is warming up to 800 DEG C, lead to
Enter the air gasification agent that flow velocity is 3L/min, 10g drying stalk powders are added from fixed bed reactors 1- feed inlets shown in attached drawing 2
Enter into gasification furnace, the gasification burning for reacting generation passes sequentially through 14- thirds preheater, 15- B-grade condensations system, 16- degreasings
The purified treatments such as cotton filter, 17- wet gas flow meters, 18- anhydrous silica gel drying devices, the gasification gas being purified are used for gas
The GC tests of phase chromatography；Gasification gas outlet pipe and condenser inner wall are washed with dichloromethane, merges tar cleaning solution and condenser
Middle tar liquid, is filtered by vacuum, and 50 DEG C of filtrate is outstanding to steam to constant weight, obtains quality of coke tar.Simultaneously as a contrast, attached drawing is utilized
2 fixed-bed gasification furnace carries out gasification aerogenesis research to unpretreated original stalk.
Biogas slurry pretreated straw gasification burning calorific value prepared by the present embodiment is 6.81MJ/Nm3, tar content is
3.38g/Nm3, gasification efficiency 69.00%.The gasification burning calorific value of original stalk is 5.55MJ/Nm3, tar content is
6.41g/Nm3, gasification efficiency 54.87%.Compared with not pre-processing maize straw, fuel gases calorific value improves biogas slurry pretreated straw
1.26MJ/Nm3, tar content reduction 3.03g/Nm3, reduction amplitude reaches 47.27%, and gasification efficiency improves 14.13%.
Embodiment 2.
1 identical method of embodiment and step used in the present embodiment, but stalk treating capacity is in the pretreatment of biogas slurry stack retting
5kg, biogas slurry additive amount are 20L (solid-to-liquid ratios 1:4), urea additive amount is 100g, and mixed material relative humidity is 80%, 35 DEG C of water
Bath stands 2d.
Gasification burning calorific value prepared by the present embodiment is 6.18MJ/Nm3, tar content 3.17g/Nm3, gasification efficiency
It is 66.00%.Compared to maize straw is not pre-processed, fuel gases calorific value improves 0.63MJ/Nm3, tar content reduction 3.24g/Nm3, drop
Low amplitude reaches 50.55%, and gasification efficiency improves 11.13%.
Embodiment 3.
1 identical method of embodiment and step used in the present embodiment, but stalk treating capacity is in the pretreatment of biogas slurry stack retting
2kg, biogas slurry additive amount are 4.67L (solid-to-liquid ratios 3:7), urea additive amount be 40g, mixed material relative humidity be 70%, 35 DEG C
Water-bath stands 3d.
Gasification burning calorific value prepared by the present embodiment is 6.42MJ/Nm3, tar content 3.06g/Nm3, gasification efficiency
It is 67.22%.Compared to maize straw is not pre-processed, fuel gases calorific value improves 0.87MJ/Nm3, tar content reduction 3.35g/Nm3, drop
Low amplitude reaches 52.26%, and gasification efficiency improves 12.35%.
Embodiment 4.
1 identical method of embodiment and step used in the present embodiment, but stalk treating capacity is in the pretreatment of biogas slurry stack retting
2kg, biogas slurry additive amount are 3L (solid-to-liquid ratios 2:3), urea additive amount is 40g, and mixed material relative humidity is 60%, 35 DEG C of water-baths
Stand 4d.
Gasification burning calorific value prepared by the present embodiment is 7.48MJ/Nm3, tar content 3.12g/Nm3, gasification efficiency
It is 72.00%.Compared to maize straw is not pre-processed, fuel gases calorific value improves 1.93MJ/Nm3, tar content reduction 3.29g/Nm3, drop
Low amplitude reaches 51.33%, and gasification efficiency improves 17.13%.
Embodiment 5.
1 identical method of embodiment and step used in the present embodiment, but biogas slurry stack retting pretreatment temperature is that 25 DEG C of water-baths are quiet
1d is set, urea additive amount is 15g.
Gasification burning calorific value prepared by the present embodiment is 5.9MJ/Nm3, tar content 2.94g/Nm3, gasification efficiency is
63.51%.Compared to maize straw is not pre-processed, fuel gases calorific value improves 0.35MJ/Nm3, tar content reduction 3.47g/Nm3, reduce
Amplitude reaches 54.13%, and gasification efficiency improves 8.64%.
Embodiment 6.
4 identical method of embodiment and step used in the present embodiment, but biogas slurry stack retting pretreatment temperature is that 30 DEG C of water-baths are quiet
4d is set, urea additive amount is 30g.
Gasification burning calorific value prepared by the present embodiment is 6.55MJ/Nm3, tar content 3.37g/Nm3, gasification efficiency
It is 68.21%.Compared to maize straw is not pre-processed, fuel gases calorific value improves 1.00MJ/Nm3, tar content reduction 3.03g/Nm3, drop
Low amplitude reaches 47.34%, and gasification efficiency improves 13.34%.
Embodiment 7.
4 identical method of embodiment and step used in the present embodiment, but biogas slurry stack retting pretreatment temperature is that 25 DEG C of water-baths are quiet
2d is set, urea additive amount is 35g.
Gasification burning calorific value prepared by the present embodiment is 6.33MJ/Nm3, tar content 3.66g/Nm3, gasification efficiency
It is 63.62%.Compared to maize straw is not pre-processed, fuel gases calorific value improves 0.78MJ/Nm3, tar content reduction 2.75g/Nm3, drop
Low amplitude reaches 42.90%, and gasification efficiency improves 8.75%.
Embodiment 8.
3 identical method of embodiment and step used in the present embodiment, but biogas slurry stack retting pretreatment temperature is 30 DEG C, and urea adds
Dosage is 35g.
Gasification burning calorific value prepared by the present embodiment is 6.62MJ/Nm3, tar content 3.03g/Nm3, gasification efficiency
It is 68.32%.Compared to maize straw is not pre-processed, fuel gases calorific value improves 1.07MJ/Nm3, tar content reduction 3.38g/Nm3, drop
Low amplitude reaches 52.73%, and gasification efficiency improves 13.45%.
2 embodiment data summarization of table
The present invention disclose and propose simple and direct utilization biogas slurry stack retting pretreatment improve stalk pyrolytic gasification combustion gas quality and
The method of gasification efficiency.Those skilled in the art can by using for reference present disclosure, it is appropriate change biogas slurry additive amount, stack retting temperature and
The reaction conditions such as processing time can be realized.In particular, it should be pointed out that all similar replacements and change are to this field skill
It is it will be apparent that they are considered as being included in spirit of that invention, range and content for art personnel.
Claims (6)
1. a kind of pre-processing the method for improving stalk pyrolytic gasification combustion gas quality and gasification efficiency using biogas slurry stack retting, it is characterized in that
Including step：
1) mechanical crushing：The maize straw for taking natural air drying, is crushed and is sieved with pulverizer, and the stalk for being less than 0.9mm grain sizes is used
It is pre-processed in biogas slurry stack retting；
2) biogas slurry is added：Maize straw after taking step 1) to pulverize and sieve is according to solid-to-liquid ratio 1:9~2:Biogas slurry is added in 3 ratio,
Solid-to-liquid ratio herein is the quality (kg) of natural air drying maize straw and volume (L) ratio of added biogas slurry.Stalk and biogas slurry are mixed
It closes uniformly, is configured to the stack retting material of relative humidity 90~60%；
3) nutrition adjustment：Take step 1) pulverize and sieve rear maize straw quality 1~2% urea be added step 2) mixing stack retting
It in material, and stirs evenly so that the C/N of mixed system reaches 25~30；
4) it is sealed：Container equipped with mixed material is capped or overlay film sealing, 25~35 DEG C of temperature stand 1~4d；
5) it dries and gasifies：The material that the pretreatment of step 4) stack retting finishes is taken out, is separated by solid-liquid separation, and solid is placed in
100~110 DEG C of baking ovens dry to obtain stalk powder；It collection is obtained stalk powder is placed in gasification furnace to gasify, in gasification furnace tail
The gasification burning that portion's collection and purification obtain.
2. the method as described in claim 1, it is characterized in that the biogas slurry is the liquid effluent or stack retting of anaerobic fermentation engineering
Liquid product after being separated by solid-liquid separation after the completion of pretreatment.
3. the method as described in claim 1, it is characterized in that being separated by solid-liquid separation the stalk biogas slurry heap that liquid continues on for other batches
Macerate pretreatment.
4. the method as described in claim 1, it is characterized in that gasification furnace includes being fixed-bed gasification furnace or tube furnace.
5. the method as described in claim 1, it is characterized in that gasification furnace gasification temperature is 800 DEG C.
6. the method as described in claim 1, it is characterized in that straw gasification gas calorific value improves 0.35 after the pretreatment of biogas slurry stack retting
~1.93MJ/Nm3, tar content reduction amplitude 47.27~54.13%；Gasification efficiency improves 8.64%~17.13%.
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