CN107988834B - A kind of pre-treating method of lignocellulosic - Google Patents

A kind of pre-treating method of lignocellulosic Download PDF

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Publication number
CN107988834B
CN107988834B CN201610968822.8A CN201610968822A CN107988834B CN 107988834 B CN107988834 B CN 107988834B CN 201610968822 A CN201610968822 A CN 201610968822A CN 107988834 B CN107988834 B CN 107988834B
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lignocellulosic
impurities
removal
impurity
crushing
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CN107988834A (en
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李春玲
李�杰
张宁
刘文信
孙文达
魏拥辉
商成祥
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COFCO BIOCHEMICAL ENERGY (ZHAODONG) Co Ltd
Cofco Corp
Cofco Nutrition and Health Research Institute Co Ltd
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COFCO BIOCHEMICAL ENERGY (ZHAODONG) Co Ltd
Cofco Corp
Cofco Nutrition and Health Research Institute Co Ltd
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00Fibrous raw materials or their mechanical treatment
    • D21B1/04Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00Fibrous raw materials or their mechanical treatment
    • D21B1/02Pretreatment of the raw materials by chemical or physical means

Abstract

The present invention relates to bioengineering and chemical field, disclose a kind of pre-treating method of lignocellulosic, method includes the following steps: lignocellulosic material 1) is carried out the first removal of impurities, to remove part metals;2) lignocellulosic material after removing part metals is carried out first to crush, so that the ratio that the granularity of obtained lignocellulosic material is 100-150mm is 80% or more, powder proportions of the granularity lower than 5mm are no more than 12%;3) the in step 2) first smashed lignocellulosic material is subjected to the second removal of impurities, further to remove metal and nonmetallic inclusion;4) lignocellulosic material for further removing metal and nonmetallic inclusion obtained in step 3) is carried out second to crush, so that the granularity of obtained lignocellulosic material is the ratio of 10-50mm 90% or more.This method can more thoroughly remove impurity, raising raw material can utilize the rate of recovery, and guarantee equipment even running, and improve the operating environment of pre-treatment.

Description

A kind of pre-treating method of lignocellulosic
Technical field
The present invention relates to bioengineering and chemical field, and in particular, to a kind of pre-treating method of lignocellulosic.
Background technique
Lignocellulosic can be used for processing feed, alcohol fuel, biomass power generation, biogas, papermaking and edible mushroom etc. Equal multiple uses.
Lignocellulosic pre-treating method is mainly comminuting method.Crushing be solid material under external force, overcome cohesion Power and be allowed to particle size reduction, the increased process of surface area.Crushing is that one kind makes bulk materials become piece material even powder End, and generate the process on new surface.It can be divided into two stages, and bulk materials are fragmented into fritter and are known as being crushed, by fritter object The process that material is fragmented into fine powdered material is known as grinding.Corresponding machinery is referred to as crushing mechanism and grinding machine.
The crushing of lignocellulosic material is one of most important process in lignocellulosic material process.It is shadow An important factor for ringing postorder quality of material, yield, power consumption and processing cost.Pulverizer power disposition accounts for lignocellulosic material and adds The larger specific gravity that work enterprise general power is equipped with, thus it is the advanced disintegrating apparatus of reasonable selection, the optimal process route of design, correct Using disintegrating apparatus, to lignocellulosic material, processing enterprise is most important.The stock number of lignocellulosic material is very rich, Purchase cost is more cheap, and small business is less to its dosage, therefore cost of material control aspect wants relative loose some, this Have led to the lag of lignocellulosic material disintegrating process process research and development.
The collection storage of lignocellulosic material is to influence one of its widely applied restraining factors at present.Some wooden fibres The collection for tieing up plain raw material inevitably will receive the influence of the factors such as territorial environment in the process, causes the incorporation of impurity, influences raw material Total quality, for example, stalk of the corn stover after northern plantation extensively, harvest corn has native stone during collection Block, fine grained soil, or even the appearance of mechanical vulnerable part metal class impurity, can inevitably be got up as raw material collection storage together.This Puzzlement just is caused to the processing and utilization of postorder lignocellulosic material, according to the purposes of raw material and the mixed proportion of impurity, is needed Different processing methods is taken, the adverse effect that impurity utilizes postorder is mitigated or eliminated.During the collection of corn stover The ratio of impurity is about 20%, and mainly (in 30mm or less), fine grained soil, (granularity is less than 90% or more granularity soil rock 10mm) and metal.
The conventional circuit grinding of lignocellulosic material is relatively simple at present, directlys adopt thick grade crushing or multi-stage crushing Raw material granularity is set to reach the index of requirement, crushing process is more rough, and exclusion device is arranged in some even not set exclusion devices Also only impurity simple collection is post-processed, containing more using ingredient (lignocellulosic material) in impurity, in addition, Conventional crushing process is not in place to the protection of working environment, and operating condition is poor, and worker is susceptible to suffer from dust-like occupational disease.
Summary of the invention
The object of the present invention is to provide a kind of pre-treating method of lignocellulosic, this method can be removed more thoroughly Impurity, raising raw material can utilize the rate of recovery, and guarantee equipment even running, and improve the operating environment of pre-treatment.
To achieve the goals above, the present invention provides a kind of pre-treating method of lignocellulosic, and this method includes following Step:
1) lignocellulosic material is subjected to the first removal of impurities, to remove part metals;
2) lignocellulosic material after removing part metals is carried out first to crush, so that obtained lignocellulosic is former For the ratio that the granularity of material is 100-150mm 80% or more, powder proportions of the granularity lower than 5mm are not more than 12%;
3) the in step 2) first smashed lignocellulosic material is subjected to the second removal of impurities, with further remove metal and Nonmetallic inclusion;
4) lignocellulosic material that metal and nonmetallic inclusion are further removed obtained in step 3) is carried out second It crushes, so that the granularity of obtained lignocellulosic material is the ratio of 10-50mm 90% or more.
Preferably, this method further includes the material impurity collected in first removal of impurities and the second removal of impurities, and miscellaneous to material Lignocellulosic material in matter is recycled.
Preferably, this method further includes being dusted to first crushing and the second crushing process, and separate dedusting and obtain To dedusting impurity in lignocellulosic material.
Through the above technical solutions, the present invention is combined by the way that the removal of impurities of two steps and two steps are broken, and broken degree is adjusted, Realize the efficiency crushing to lignocellulosic material, the impurity content in finished product can be reduced using the rate of recovery by improving raw material, It has ensured that equipment continuously runs well, has been highly suitable for the processing of heavy industrialization lignocellulosic material.
Specifically, first the first removal of impurities of progress before is crushed, it can be by iron nail, iron filings and other iron impurities in raw material Cleaning removal in advance, reduces the damage to the first disintegrating apparatus, reduces the cost of plant maintenance, effectively ensured equipment Safety run well.First crush after carry out second removal of impurities, can by stone remaining in raw material after crushing, soil block and Remaining iron impurities efficiently are sieved to leave away and be removed.To, the present invention can be improved material using the rate of recovery, reduce after crushing Impurity ratio in material, equipment can continuously run well for a long time, and can be effectively improved working environment.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of the pre-treating method of lignocellulosic in a kind of preferred embodiment of the invention.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more New numberical range, these numberical ranges should be considered as specific open herein.
A kind of pre-treating method of lignocellulosic provided by the invention, method includes the following steps:
1) lignocellulosic material is subjected to the first removal of impurities, to remove part metals;
2) lignocellulosic material after removing part metals is carried out first to crush, so that obtained lignocellulosic is former For the ratio that the granularity of material is 100-150mm 80% or more, powder proportions of the granularity lower than 5mm are not more than 12%;
3) the in step 2) first smashed lignocellulosic material is subjected to the second removal of impurities, with further remove metal and Nonmetallic inclusion;
4) lignocellulosic material that metal and nonmetallic inclusion are further removed obtained in step 3) is carried out second It crushes, so that the granularity of obtained lignocellulosic material is the ratio of 10-50mm 90% or more.
In the present invention, lignocellulosic material can be wood used in production feed, alcohol fuel, biomass power generation Matter cellulosic material is specifically as follows corn stover, straw, reed, cotton stalk, rape straw, kaoliang stalk, bagasse and rice straw etc. Deng preferably one of corn stover, straw and reed or a variety of.
According to the present invention, the mode of first removal of impurities can be according to this field conventional selection, can be for selected from the first sieve Divide, roll-type cleans, the first electromagnetism removes one of iron or a variety of.Preferably, by the first screening and the first electromagnetism except iron is to wood Matter cellulosic material carries out first removal of impurities.Specifically, first screening is for removing the stone in lignocellulosic material The impurity of block, soil block, metal etc.;First electromagnetism is except iron is for removing metal impurities.
In the case where further preferably, first removal of impurities is carried out by vibrating screen and electric magnetic iron remover.The vibrating screen Setting with the electric magnetic iron remover can be carried out using the condition of this field routine.The first specific condition of removal of impurities can wrap Include: the screen-aperture of vibrating screen is 20-50mm, and vibration frequency is 20-50 times/min, and the first electromagnetism includes: magnetic except the condition of iron Field intensity is 700-1600Oe;It is preferred that are as follows: the screen-aperture of vibrating screen is 25-45mm, and vibration frequency is 25-45 times/min, the One electromagnetism is 900-1500Oe except the condition of iron includes: magnetic field strength.By the first removal of impurities, lignocellulosic material can remove In 60% or more material impurity.
According to the present invention, it described first crushes for tentatively crushing lignocellulosic material, it can be normal using this field The means of rule carry out.Such as the mode of first crushing is preferably to hammer into shape in blade type crushing and/or hammer type crushing Chip crushes.Described first condition crushed can be according to the needs selection appropriate of crushing, so that obtained lignocellulosic For the ratio that the granularity of raw material is 100-150mm 80% or more, powder proportions of the granularity lower than 5mm are not more than 12%.Tool Body, it is 0.1-1.0 seconds that the described first condition crushed, which may include: grinding time,.
According to the present invention, the mode of second removal of impurities can be according to this field conventional selection, can be for selected from the second sieve Divide, roll-type cleans, the second electromagnetism removes one of iron or a variety of.For the removal rate for guaranteeing impurity, metal impurities are further removed, Guarantee that equipment safety operates, in preferred situation, iron is removed by roll-type removal of impurities and the second electromagnetism, lignocellulosic material is carried out Second removal of impurities.Specifically, the roll-type removal of impurities is for removing stone cleaning, soil block and part iron impurities etc., second electricity Magnetic is except iron is for further removing metal impurities.Roll-type removal of impurities can using roll-type de-burring machine commonly used in the art into Row, second electromagnetism can be carried out except iron using electric magnetic iron remover commonly used in the art.Preferably, second removal of impurities Condition include: roll-type removal of impurities mesh aperture be 5-50mm, magnetic field strength 700-1600Oe;It is preferred that are as follows: roll-type removal of impurities Mesh aperture is 10-30mm, and the second electromagnetism is 900-1500Oe except the magnetic field strength of iron.
According to the present invention, it described second crushes for further crushing lignocellulosic material, this field can be used Conventional means carry out.Described second mode crushed can be for selected from blade type crushing and/or hammer type crushing, preferably knife Chip crushes.Described second condition crushed can be according to the needs selection appropriate of crushing, and the lignocellulosic made is former For the ratio that the granularity of material is 10-50mm 90% or more, powder proportions of the granularity lower than 5mm are not more than 10%.Specifically, It is 0.1-1.0 seconds that described second condition crushed, which may include: grinding time,.
Raw material is cut into the different raw material section of granule size in crushing process, and some is even fractured into powder, leads to Crossing the first removal of impurities and the second removal of impurities ensures farthest to remove impurity, but inevitably will cause in raw material during this The loss of fine particle or small block raw material, is separated together with impurity, causes raw material that can utilize the reduction of the rate of recovery.This In invention, material impurity refers to impurity (in general, the averag density isolated in first removal of impurities and the second dedoping step Greater than 1g/cm3), wherein the impurity isolated in the first dedoping step is known as first material impurity, in the second dedoping step The impurity isolated is known as second material impurity.In order to further increase lignocellulosic material using the rate of recovery, the wood The pre-treating method of matter cellulose further includes the material impurity collected in first removal of impurities and the second removal of impurities, and to material impurity In lignocellulosic material recycled.
According to the present invention, various sides commonly used in the art can be used in the lignocellulosic material in separation of material impurity Method achievees the effect that separation.Preferably, the method recycled to the lignocellulosic material in material impurity includes pair The material impurity carries out third screening and/or selection by winnowing.Specifically, the screen-aperture of the third screening is 10-20mm, described The condition of selection by winnowing includes: that wind speed is 10-20m/s.
After third screening and selection by winnowing, lignocellulosic material is divided into miscellaneous, big section raw material eventually and segment or particulate material Three parts, miscellaneous predominantly stone, soil great group impurity eventually, ratio 95% or more, the impurity rate of recovery of whole process 95% with On, it is stacked in miscellaneous Unified Set eventually, transports operation place, carry out harmless treatment (generally filling);(granularity is greater than big section raw material 50mm and be not more than 100mm) collect after carry out second crush;Segment raw material (granularity 10mm-50mm) and particulate material (granularity Less than 10mm) directly as the finished product of pre-treatment.
A preferred embodiment according to the present invention, by wooden in third screening and selection by winnowing separation of material impurity Cellulosic material, operation are specially to sieve material impurity by third, and ingredient carries out selection by winnowing, selection by winnowing point again under obtained sieve For the lightweight material separated out directly as the finished product of pre-treatment, the selection by winnowing weight that selection by winnowing is isolated is miscellaneous as miscellaneous carry out harmless treatment eventually (generally filling).Wherein, ingredient is crushed into first on sieve of the first material impurity by third screening, and described second Ingredient enters second and crushes on sieve of the material impurity by third screening.
In order to further increase lignocellulosic material using the rate of recovery, while reducing the dust content in environment, Preferably, this method further includes being dusted to first crushing and the second crushing process, and separate the dedusting that dedusting obtains Lignocellulosic material in impurity.Here dedusting impurity include the smaller particle formed in crushing process raw material and Dust etc..
According to the present invention, by depression dust-removing system to first crush and second crush in be dusted, and be sent into pulse Deduster.The depression dust-removing system includes that blower, pulse dust collector, separator, suction inlet (dust collection cover) and attached conveying are logical Road and conveying equipment.The operating condition of the depression dust-removing system includes: that pressure is -2000~-5000Pa.The pulse dust removal The operating condition of device includes: that filtration velocity is 2-5m/min, and the material of pulse period 3-60s, preferably 10-40s, filter bag are Waterproof and oilproof Nomex, terylene needled felt, aramid fiber Nomex (Nomex nylon) Nomex, glass Nomex, the dual Woven glass cloth of latitude or Lay are logical Nomex, preferably waterproof and oilproof Nomex, compressed air pressure 0.5-0.7MPa.
By means of the invention it is also possible to improve working environment, occupational disease probability of happening is reduced.By using pulse dust removal Device dedusting, and the raw material in dedusting impurity can be recycled, so that the working environment of employee is obtained huge change in this way It is kind, maximum recycling also has been carried out to effective component in dust, substantially increase raw material using the rate of recovery.
The present invention also provides the pre-treating methods of above-mentioned lignocellulosic in processing corn stover, straw, reed, cotton In bar, rape straw, kaoliang stalk, bagasse and rice straw it is one or more in application.
The present invention will be described in detail by way of examples below.In following embodiment, the ratio of raw material granularity is logical It crosses and the statistical method of the raw material weight proportion in different length value range is measured;Vibrating screen is Zhaodong City's light industry and machinery The LMSS series horizontal vibration conveyor of factory's production;Electric magnetic iron remover is the production of Zhaodong City's boiler accessory machinery factory, model RCYB-5; Roll-type de-burring machine be Weifang set sail machinery plant production;Pulse dust collector is the production of Jiangsu Yu Gang mechanical equipment Manufacturing Co., Ltd, Model YGWM type;Depression dust-removing system is the production of Jiangsu Yu Gang mechanical equipment Manufacturing Co., Ltd;Gravity screening installation is wine The production of seed Mechanology Inc., spring city, model 5ZX-3.0 type;Beater disintegrating machine is Qufu City Tai Feng mechanical equipment Co., Ltd Production, model TF50-50;It is that Qufu City Tai Feng mechanical equipment Co., Ltd produces that blade type, which crushes, model 800PC;Wind Select machine for Deere & Co.'s production difficult to understand, model FX-2000.
In following embodiment, the lignocellulosic material used is corn stover.
Embodiment 1
1) as shown in Figure 1, lignocellulosic material is passed sequentially through the first removal of impurities of vibrating screen and electric magnetic iron remover progress, vibration The screen-aperture of dynamic sieve is 25mm, and vibration frequency is 25 times/min, and the first electromagnetism is 900Oe except the magnetic field strength of iron.
2) lignocellulosic material after removing part metals is subjected to the first crushing with beater disintegrating machine, first crushes Grinding time be 0.1 second, rotor speed is 300 turns/min, and the granularity of obtained lignocellulosic material is 100-150mm's Ratio is 80.20%.
3) the in step 2) first smashed lignocellulosic material is carried out by roll-type de-burring machine and electric magnetic iron remover Second removal of impurities, the condition of the second removal of impurities include: that the mesh aperture of roll-type removal of impurities is 10mm, and the second electromagnetism is except the magnetic field strength of iron 1500Oe。
4) the lignocellulosic material blade type of metal and nonmetallic inclusion will be further removed obtained in step 3) Pulverizer carries out second and crushes, and the second grinding time crushed is 0.1 second, and rotor speed is 800 turns/min, obtained wooden fibre The ratio that the granularity for tieing up plain raw material is 10-50mm is 90.45%.
5) first material impurity obtained in above-mentioned first removal of impurities is collected, carries out third sieve with the vibrating screen that aperture is 20mm Point, and use winnowing machine to carry out selection by winnowing (wind speed 15m/s) the lower ingredient of sieve and remove the miscellaneous rear finished product as pre-treatment of selection by winnowing weight;It receives Second material impurity obtained in the second removal of impurities of collection carries out third screening with the vibrating screen that aperture is 20mm, and will sieve lower ingredient It uses winnowing machine to carry out selection by winnowing (wind speed 15m/s) and removes the miscellaneous rear finished product as pre-treatment of selection by winnowing weight.
6) it is crushed using depression dust-removing system to above-mentioned first and the second crushing process is dusted, and pass sequentially through pulse Deduster recycles the lignocellulosic material in dedusting impurity.The operating condition of depression dust-removing system include: pressure be- 2000Pa.The operating condition of pulse dust collector includes: that filtration velocity is 2m/min, and the material of filter bag is waterproof and oilproof Nomex, Pulse period is 10s, compressed air pressure 0.5MPa.
By measurement, lignocellulosic material can be 86.36% using the rate of recovery, and the impurity ratio in crushing rear material is 5.5%, the dust content in working environment is 10.52mg/m3, equipment can continuously run well 72h.
Embodiment 2
1) lignocellulosic material is passed sequentially through into vibrating screen and electric magnetic iron remover carries out the first removal of impurities, the sieve pore of vibrating screen Aperture is 35mm, and vibration frequency is 35 times/min, and the first electromagnetism is 1200Oe except the magnetic field strength of iron.
2) lignocellulosic material after removing part metals is subjected to the first crushing with beater disintegrating machine, first crushes Grinding time be 0.5 second, the ratio that the granularity of obtained lignocellulosic material is 100-150mm is 82.83%.
3) the in step 2) first smashed lignocellulosic material is passed sequentially through into roll-type de-burring machine and electric magnetic iron remover The second removal of impurities is carried out, the condition of the second removal of impurities includes: that the mesh aperture of roll-type removal of impurities is 20mm, and the second electromagnetism is strong except the magnetic field of iron Degree is 1200Oe.
4) the lignocellulosic material blade type of metal and nonmetallic inclusion will be further removed obtained in step 3) Pulverizer carries out second and crushes, and the second grinding time crushed is 0.5 second, and the granularity of obtained lignocellulosic material is 10- The ratio of 50mm is 91.49%.
5) with 1 step 5 of embodiment.
6) it is crushed using depression dust-removing system to above-mentioned first and the second crushing process is dusted, and pass through pulse dust removal Device recycles the lignocellulosic material in dedusting impurity.The operating condition of depression dust-removing system includes: that pressure is -3500pa.Arteries and veins It is 3.5m/min that the operating condition for rushing deduster, which includes: filtration velocity, and the material of filter bag is waterproof and oilproof Nomex, pulse period For 25s, compressed air pressure 0.6MPa.
By measurement, lignocellulosic material can be 89.90% using the rate of recovery, and the impurity ratio in crushing rear material is 4.8%, the dust content in working environment is 6.38mg/m3, equipment can continuously run well 72h.
Embodiment 3
1) lignocellulosic material is passed sequentially through into vibrating screen and electric magnetic iron remover carries out the first removal of impurities, the sieve pore of vibrating screen Aperture is 45mm, and vibration frequency is 45 times/min, and the first electromagnetism is 1500Oe except the magnetic field strength of iron;
2) lignocellulosic material after removing part metals is subjected to the first crushing with beater disintegrating machine, first crushes Grinding time be 1.0 seconds, the ratio that the granularity of obtained lignocellulosic material is 100-150mm is 85%.
3) the in step 2) first smashed lignocellulosic material is passed sequentially through into roll-type de-burring machine and electric magnetic iron remover The second removal of impurities is carried out, the condition of the second removal of impurities includes: that the mesh aperture of roll-type removal of impurities is 30mm, and the second electromagnetism is strong except the magnetic field of iron Degree is 900Oe.
4) the lignocellulosic material blade type of metal and nonmetallic inclusion will be further removed obtained in step 3) Pulverizer carries out second and crushes, and the second grinding time crushed is 1.0 seconds, and the granularity of obtained lignocellulosic material is 10- The ratio of 50mm is 94%.
5) with 1 step 5 of embodiment.
6) it is crushed using depression dust-removing system to described first and the second crushing process is dusted, and pass through pulse dust removal Device recycles the lignocellulosic material in dedusting impurity.The operating condition of depression dust-removing system includes: that pressure is -5000pa.Arteries and veins It is 5m/min that the operating condition for rushing deduster, which includes: filtration velocity, and the material of filter bag is waterproof and oilproof Nomex, and the pulse period is 40s, compressed air pressure 0.7MPa.
By measurement, lignocellulosic material can be 90% using the rate of recovery, and the impurity ratio in crushing rear material is 3.6%, the dust content in working environment is 3mg/m3, equipment can continuously run well 72h.
Embodiment 4
The pre-treatment of lignocellulosic material is carried out according to the method for embodiment 1, unlike, without in step 5) Operation.
By measurement, lignocellulosic material can be 81.02% using the rate of recovery, and the impurity ratio in crushing rear material is 5.06%, the dust content in working environment is 8.96mg/m3
Embodiment 5
The pre-treatment of lignocellulosic material is carried out according to the method for embodiment 1, unlike, without in step 6) Operation.
By measurement, lignocellulosic material can be 80.80% using the rate of recovery, and the impurity ratio in crushing rear material is 5.65%, the dust content in working environment is 45.71mg/m3
Comparative example 1
The pre-treatment of lignocellulosic material is carried out according to the method for embodiment 1, unlike, without in the first removal of impurities The first electromagnetism except iron operate.
By measurement, lignocellulosic material can be 86.10% using the rate of recovery, and the impurity ratio in crushing rear material is 8.70%, equipment can continuously run well 8h.
Comparative example 2
The pre-treatment of lignocellulosic material is carried out according to the method for embodiment 1, unlike, without in the second removal of impurities The second electromagnetism except iron operate.
By measurement, lignocellulosic material can be 86.45% using the rate of recovery, and the impurity ratio in crushing rear material is 7.51%, equipment can continuously run well 48h.
Comparative example 3
The pre-treatment of lignocellulosic material is carried out according to the method for embodiment 1, unlike, without the second removal of impurities behaviour Make.
By measurement, lignocellulosic material can be 77.65% using the rate of recovery, and the impurity ratio in crushing rear material is 5.76%, equipment can continuously run well 50h.
Comparative example 4
The pre-treatment of lignocellulosic material is carried out according to the method for embodiment 1, unlike, behaviour is crushed without first Make.
Since the lignocellulosic material granularity crushed without first is larger, being directly entered in roll-type de-burring machine be will cause Equipment blocking, operation conditions is bad, can not continuously run well.
Comparative example 5
Lignocellulosic material carries out removal of impurities processing first, removes stone and part ironware that partial size is more than 5cm, removal Big miscellaneous rear directly progress blade type crushing, the granularity that raw material crushes is regulated and controled by equipment knife number, directly as preceding after crushing The finished product of processing.
By measurement, lignocellulosic material can be 81.56% using the rate of recovery, and the impurity ratio in crushing rear material is 5.66%, the dust content in working environment is higher than 50mg/m3.Equipment can continuously run well 10h, the continuous work of equipment Ability is far below the present invention.
Through the foregoing embodiment 1 and comparative example 1,2 comparison it is found that only carrying out electromagnetism except iron in the case where, crush The impurity ratio in material significantly improves afterwards, and the continuous work ability of equipment is far below embodiment 1.Through the foregoing embodiment 1 and comparative example 3 comparison it is found that without second except in the case where miscellaneous operation, lignocellulosic material can be dropped using the rate of recovery Low, pretreatment process causes very big waste.
Wood can be improved by the control of each step condition in lignocellulosic material pre-treating method provided by the invention The treatment effeciency of matter cellulosic material, the rate of recovery can be utilized by improving lignocellulosic material, reduce the impurity in crushing rear material Ratio, equipment can continuously run well for a long time, and effectively reduce the dust content in working environment.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should also be regarded as the disclosure of the present invention.

Claims (11)

1. a kind of pre-treating method of lignocellulosic, which is characterized in that method includes the following steps:
1) lignocellulosic material is subjected to the first removal of impurities, to remove part metals;
2) lignocellulosic material after removing part metals first is carried out to crush, so that obtained lignocellulosic material For the ratio that granularity is 100-150mm 80% or more, powder proportions of the granularity lower than 5mm are not more than 12%;
3) the in step 2 first smashed lignocellulosic material is subjected to the second removal of impurities, further to remove metal and Fei Jin Belong to impurity;
4) lignocellulosic material for further removing metal and nonmetallic inclusion obtained in step 3) second is carried out to crush, So that the granularity of obtained lignocellulosic material is the ratio of 10-50mm 90% or more;
Wherein, it is cleaned by the first screening and the first electromagnetism except iron carries out described first to lignocellulosic material;
This method further includes the material impurity collected in first removal of impurities and the second removal of impurities, and to the wooden fibre in material impurity Plain raw material is tieed up to be recycled;The method recycled to the lignocellulosic material in material impurity includes to the material impurity Carry out third screening and/or selection by winnowing;
This method further includes being dusted by depression dust-removing system to first crushing and the second crushing process, and separate and remove The lignocellulosic material in dedusting impurity that dirt obtains.
2. according to the method described in claim 1, wherein, carrying out first removal of impurities by vibrating screen and electric magnetic iron remover.
3. according to the method described in claim 1, wherein, the condition of first screening includes: that the screen-aperture of vibrating screen is 20-50mm, vibration frequency are 20-50 times/min, and first electromagnetism is 700-1600 except the condition of iron includes: magnetic field strength Oe。
4. according to the method described in claim 1, wherein, the described first mode crushed is blade type crushing and/or hammer slice type It crushes.
5. according to the method described in claim 1, wherein, removing iron to lignocellulosic material by roll-type removal of impurities and the second electromagnetism Carry out second removal of impurities.
6. according to the method described in claim 5, wherein, the condition of second removal of impurities includes: the mesh aperture of roll-type removal of impurities For 5-50mm, the second electromagnetism is 700-1600 Oe except the magnetic field strength of iron.
7. according to the method described in claim 1, wherein, the described second mode crushed is blade type crushing and/or hammer slice type It crushes.
8. according to the method described in claim 1, wherein, the screen-aperture of the third screening is 10-20mm, the selection by winnowing Condition includes: that wind speed is 10-20m/s.
9. according to the method described in claim 1, wherein, it is former to recycle the lignocellulosic in dedusting impurity using pulse dust collector Material.
10. method described in any one of -9 according to claim 1, wherein the lignocellulosic material be corn stover, It is one or more in straw, reed, cotton stalk, rape straw, kaoliang stalk, bagasse and rice straw.
11. the pre-treating method of lignocellulosic described in any one of claim 1-10 processing corn stover, straw, In reed, cotton stalk, rape straw, kaoliang stalk, bagasse and rice straw it is one or more in application.
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0338231A2 (en) * 1988-04-22 1989-10-25 Krupp Polysius Ag Crushing plant
SU1717227A1 (en) * 1990-05-11 1992-03-07 Запорожский индустриальный институт Dry concentration unit for kaolin
CN101954307A (en) * 2010-06-09 2011-01-26 广州迪森热能技术股份有限公司 Method for processing biological wastes
CN102049342A (en) * 2009-11-04 2011-05-11 中粮集团有限公司 Method for grinding materials
CN102049344A (en) * 2009-11-04 2011-05-11 中粮集团有限公司 Material grinding system
CN202097032U (en) * 2011-05-31 2012-01-04 重庆理文造纸有限公司 Ferruginous impurity removing device for stock screening
CN202155245U (en) * 2011-06-10 2012-03-07 山东振龙生物化工集团有限公司 Impurity removing system
CN204261734U (en) * 2014-11-28 2015-04-15 湖南省展望生物科技发展有限公司 A kind of micronizer with knot screen
CN104858034A (en) * 2015-02-13 2015-08-26 河南上源精工机械有限公司 Continuous straw crushing system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0338231A2 (en) * 1988-04-22 1989-10-25 Krupp Polysius Ag Crushing plant
SU1717227A1 (en) * 1990-05-11 1992-03-07 Запорожский индустриальный институт Dry concentration unit for kaolin
CN102049342A (en) * 2009-11-04 2011-05-11 中粮集团有限公司 Method for grinding materials
CN102049344A (en) * 2009-11-04 2011-05-11 中粮集团有限公司 Material grinding system
CN101954307A (en) * 2010-06-09 2011-01-26 广州迪森热能技术股份有限公司 Method for processing biological wastes
CN202097032U (en) * 2011-05-31 2012-01-04 重庆理文造纸有限公司 Ferruginous impurity removing device for stock screening
CN202155245U (en) * 2011-06-10 2012-03-07 山东振龙生物化工集团有限公司 Impurity removing system
CN204261734U (en) * 2014-11-28 2015-04-15 湖南省展望生物科技发展有限公司 A kind of micronizer with knot screen
CN104858034A (en) * 2015-02-13 2015-08-26 河南上源精工机械有限公司 Continuous straw crushing system

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