CN106841058B - A kind of online test method and device of biomass by hydro-thermal preprocessing process - Google Patents
A kind of online test method and device of biomass by hydro-thermal preprocessing process Download PDFInfo
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Abstract
The present invention relates to the technical fields of biological quality detection, disclose the online test method and device of a kind of biomass by hydro-thermal preprocessing process.The on-line measuring device includes pre-hydrolyzed solution sampler, sequentially connected for purifying the filter device, cooling device, sample preparation device of sample, spectrum detection device, and the data processing equipment for data collection and detection model operation；The sample preparation device is connect with buffer reservoir by buffer pipeline；It is additionally provided with metering pump, flowmeter and the solenoid valve for being respectively used to pre-hydrolyzed solution and buffer flow that detection flows into sample preparation device.The online test method is fitted modeling according to the absorbance and pre-hydrolyzed solution ratio of acquisition and obtains detection model, calculates separately to obtain prehydrolysis yield, cellulose and hemicellulose removal rate with detection model.The present apparatus and method have good practicability and very high accuracy, and the on-line checking and control to enterprise's hot water pre-hydrolysis technique effect have important practical value.
Description
Technical field
The present invention relates to the technical fields of biological quality detection, more particularly to a kind of biomass by hydro-thermal preprocessing process
Online test method and device.
Background technique
Hydrothermal pretreatment technique is that the biomass materials such as timber, bamboo, rice straw carry out pulping and paper-making or biomass essence
Important link in sweetening process, has important influence to subsequent slurrying and bleaching, has in the actual production of factory important
Status.
Studies have found that hydrothermal pretreatment has relative to other processing methods corrodes small, xylose degradation to hydrolysis device
The features such as product is few.Hydrothermal pretreatment can substantially remove hemicellulose, and smaller to the degradation extent of the destruction of cellulose,
It is presently the most one of widely used hemicellulose preconditioning technique, and hemicellulose pre-processes extraction process development side from now on
To.
There are many factor of yield, cellulose and hemicellulose removal rate of biomass etc. after influence hydrothermal pretreatment, existing
There are many detection schemes in technology, for example, South China Science & Engineering University utilizes mixing bamboo chip hot water pre-hydrolysis technique, using efficient liquid phase
Chromatograph analyzes experimental result；The Conduce Disciplinarian of furfural (F) and hydroxymethylfurfural (HMF) in hot water pre-hydrolysis process is had studied,
And respectively obtain the math equation of two kinds of prediction F and HMF concentration.Meanwhile establish in the pre- extract of bamboo hot water respectively F and
The prediction model of HMF concentration.
Chinese papermaking research institute He Wenlong has studied quickly measurement wood-cellulose, hemicellulose using near infrared spectroscopy
With the research of Klason content of lignin method and its feasibility.With the fiber of near-infrared spectral measurement kinds of experiments sample
Element, hemicellulose and Klason content of lignin, to its data carry out first derivative+vector normalization (SNV) and first derivative+
Multiplicative scatter correction (MSC) pretreatment after, and select suitable section establish sample fiber cellulose content, half fiber dimension hplc,
Model between Klason content of lignin and spectra values.
The scan data and experiment measurement numerical value that Beijing Forestry University measures near infrared spectrum, build in conjunction with different mathematics
Mould method establishes the prediction model of lignin, pentosan content respectively.Lignin, penta can be constantly detected using the technology
Glycan content, because the technique that lignin and pentosan are boiling and bleaching all has an impact, when using the prediction model energy
When detection production in slurry constantly situation.
South China Science & Engineering University has studied furfural and hydroxymethylfurfural of the ultraviolet spectrometry in measurement hot water extracting solution
The applicability of content.This method does not have to carry out color development treatment, operation when having the advantage that measurement compared to method before
Method is simple and quick etc..
However, above-mentioned technology is all offline inspection scheme, testing result is there are serious hysteresis quality and there is sampling difficulty
It the problems such as big, can not real-time instruction production.Therefore, it is necessary to study the related law of each component in hydro-thermal pre-hydrolyzed solution, and
The model and equipment that can constantly detect kinds of ingredients in hydrolyzate is established, to factory's pulping and papermaking process or biomass essence
Sweetening process etc. is of great significance.
Summary of the invention
The technical problem to be solved in the present invention is that overcome drawbacks described above, a kind of biomass by hydro-thermal preprocessing process is provided
On-line measuring device.
Another object of the present invention is to provide a kind of online test methods of biomass by hydro-thermal preprocessing process.
The invention is realized by the following technical scheme:
A kind of on-line measuring device of biomass by hydro-thermal preprocessing process, including the pre-hydrolyzed solution sampling being connect with reactor
Device with the sequentially connected filter device for purifying sample of pre-hydrolyzed solution pipeline, cooling device, is used for pre-hydrolyzed solution and delays
The sample preparation device of fliud flushing mixing, spectrum detection device, and the data processing equipment for data collection and detection model operation；
The sample preparation device is connect with buffer reservoir by buffer pipeline；It is additionally provided with and is respectively used to detect and control inflow sample preparation
Metering pump, flowmeter and the solenoid valve of pre-hydrolyzed solution and buffer flow in device.
The invention introduces buffering liquid supply system in online spectral detection system, by metering pump, or
The usage ratio of pre-hydrolyzed solution and buffer is regulated and controled by the cooperation of flowmeter and solenoid valve, stablizes pH value to obtain
Sample to be tested obtains accuracy and the high testing result of accuracy.The data processing equipment is computer (computer) or monolithic
Machine equal controller.
In prehydrolysis treatment process, the reactor is equipped with the device of reaction solution outer circulation, can carry out following outside reaction solution
Ring, with the treatment effect of the uniformity and each position raw material that ensure to react.Preferably, the pre-hydrolyzed solution sampler with react
The entrance of the device of liquid outer circulation is connected.
Generating fouling etc. due to the complicated component of pre-hydrolyzed solution, on easy pipeline and equipment influences the stream of liquid in pipeline
Dynamic state causes flowed fluctuation and equipment normal use and spectral detection precision；Further, it is additionally provided with pipeline washing device,
The pipeline washing device is connect with pre-hydrolyzed solution pipeline and buffer pipeline by cleaning fluid pipe respectively；The pipeline-cleaning
Device includes cleaning solution reservoir, the pump and valve that are arranged in cleaning fluid pipe.
Preferably, the filter device is crossing filtering device, and the crossing filtering device is connect with cleaning device.
Further, the sample preparation device and spectrum detection device are separately connected waste collection slot.
Concentration, acid-base property and the chromatic value of pre-hydrolyzed solution can exceed that the detection threshold value of spectroscopic detector, and high concentration
Influence of the solution to detection accuracy and stability it is very big, how to prepare thus and meet the pre-hydrolyzed solution sample of detection demand and be
The key point of on-line checking.In addition, solution enters in spectrum detection device after mixing by pumping and in sample preparation device,
Pumping and mixing often will cause the unstability of convection current amount, and then there is to the huge of testing result Stability and veracity
It is big to influence.(low liquor ratio) the hydrothermal pretreatment technique for being 1.0-2.5L/kg preferably for liquor ratio, the sample preparation device are arteries and veins
Mixing arrangement is rushed, is equipped with quantitative loop and six-way valve in the sample preparation device；(in high liquor ratio) for being 2.5-20L/kg for liquor ratio
Hydrothermal pretreatment technique, the sample preparation device are triple valve direct mixer.Between the sample preparation device and spectrum detection device
Spiral pipeline equipped with current stabilization immixture.
Further, the spectrum detection device includes floating cuvette, light source etc., and the light path of the floating cuvette is
2mm~5cm.The light source is the double-colored light source of diode.
Further, the pre-hydrolyzed solution pipeline and buffer pipeline are respectively equipped with pump, valve.Preferably, the pump
For metering pump.Preferably, the valve is solenoid valve.The solenoid valve is connect with flowmeter with data processing equipment.Preferably,
The junction of the cleaning fluid pipe and buffer pipeline is located between the valve and pump on buffer pipeline；Preferably, described
The junction of cleaning fluid pipe and pre-hydrolyzed solution pipeline is on the pipeline between filter device and cooling device.
Preferably, pH value detection device is equipped in the sample preparation device.Preferably, the sampler, filter device, cold
But device or pre-hydrolyzed solution pipeline are equipped with pH value detection device.To guarantee to detect accurate spectral signal value and avoid pre-processing
Deposition of the insoluble organic matter on tube wall in liquid.
A kind of detection method of the on-line measuring device of the biomass by hydro-thermal preprocessing process, comprising the following steps:
S1. pre-hydrolyzed solution sample is taken out from biomass water heat pretreatment reactor, it is molten with buffering after being filtered, being cooled down
Liquid is mixed in the sample preparation device in proportion, obtains sample to be tested；
S2. the sample to be tested in S1 is subjected to online spectral detection after the helix tube current stabilization mixing arrangement, and
Record the absorbance of t moment pre-hydrolyzed solution and reference liquid at wavelength θ 1 and θ 2；
S3. the absorbance obtained in S2 and pre-hydrolyzed solution ratio are fitted modeling and obtain detection model, with detection mould
Type calculates separately to obtain the pretreated prehydrolysis yield of biomass by hydro-thermal, cellulose and hemicellulose removal rate.
Preferably, S1. is mixed in proportion with buffer solution, the mixed proportion of buffer solution and pre-hydrolyzed solution sample
It is controlled using the metering pump or flowmeter of the two with solenoid valve, which must meet absorbance of the spectroscopic detector at θ 1
Signal value is in the range of 0.05-2.0, and minimum mixed proportion is according to the actual pH and buffer solution itself of solution after mixing
Difference between pH value determines that the two deviation is in ± 0.25 pH value unit.
Preferably, the detection model are as follows:
In formula, Y-- prehydrolysis yield, cellulose and hemicellulose removal rate, %；M, n-- equation coefficient, %；The pre- water of D--
Solve liquor ratio, m3/t；VD、VP-- buffering flow quantity and pre-hydrolyzed solution flow, mL/min；At,θ1、A0,θ1-- t moment pre-hydrolyzed solution and ginseng
Than absorbance of the liquid at wavelength θ 1, dimensionless；At,θ2、A0,θ2-- the extinction of t moment pre-hydrolyzed solution and reference liquid at wavelength θ 2
Degree, dimensionless.
The invention establishes pre-hydrolyzed solution than the pass with prehydrolysis yield, cellulose and hemicellulose removal rate
System, the acquisition prehydrolysis that has been applicable to that the absorbance by producing known pre-hydrolyzed solution ratio and pre-hydrolyzed solution is established obtain
The detection model of rate, cellulose and hemicellulose removal rate has very high accuracy, accuracy, greatly simplifies pre-
The relationship between indexs and manufacturing condition such as hydrolyzate yield, detection efficiency greatly improve, and device and method are practical.
Detection model of the present invention is suitable for the hydrolysis pretreatment process of different raw materials (such as timber, bamboo, stalk).According to not
With the needs of testing result, selecting corresponding wavelength and equation coefficient to carry out operation be can be obtained.The detection model only has two
A equation coefficient m, n, the determination of the equation coefficient at least only need to have two groups of productions or experimental data and can acquire, this is for life
Produce during quickly establish detection model carry out production control it is particularly important, timeliness by force and it is at low cost.
Preferably, the ratio that buffer and pre-hydrolyzed solution mix in S1 are as follows: buffering flow quantity is 5~500mL/min；Pre- water
Solution flow quantity is 0.1~10mL/min.
Preferably, the buffer solution is that sodium hydroxide, sodium acetate, sodium phosphate, potassium hydroxide etc. do not produce when closing with acid-mixed
The alkaline salt solution of angry body, pH value is between 10.5-14.
Preferably, for wavelength θ 1 used by the spectroscopic detector used for 220~450nm, wavelength θ 2 is 450~900nm.
Preferably, the pre-hydrolyzed solution ratio is 1.0~30.0L/kg；It is further preferred that the pre-hydrolyzed solution ratio be 1.0~
15.0L/kg.The equation coefficient m is that -50~50, n is 5~95.Preferably, the equation coefficient m be -15~35, n be 9~
80.The equation coefficient is sampled using preprocessing process different time points solid-liquid, then according to ASTM E1758 (2015) standard
Detection method carries out quantitative detection, will test result and is solved to obtain with the detection model.
Compared with now with technology, the invention has the following advantages:
The invention introduces buffering liquid supply system in online spectral detection system, passes through metering pump, flow
Meter the usage ratio of pre-hydrolyzed solution and buffer is regulated and controled, with obtain stablize pH value sample to be tested, obtain accuracy and
The high testing result of accuracy.
The complicated component due to pre-hydrolyzed solution is overcome by pipeline washing device, generates knot on easy pipeline and equipment
The flow regime of liquid in the influence pipeline such as dirt, causes flowed fluctuation and the technology of equipment normal use and spectral detection precision is asked
Topic.
Sample preparation device, helix tube current stabilization mixing arrangement of the invention etc. handle the solution before spectral detection, to obtain
Obtained the good testing result of Stability and veracity.
The invention establishes pre-hydrolyzed solution than the pass with prehydrolysis yield, cellulose and hemicellulose removal rate
System, the acquisition prehydrolysis that has been applicable to that the absorbance by producing known pre-hydrolyzed solution ratio and pre-hydrolyzed solution is established obtain
The detection model of rate, cellulose and hemicellulose removal rate has very high accuracy, accuracy, greatly simplifies pre-
The relationship between indexs and manufacturing condition such as hydrolyzate yield, detection efficiency greatly improve, and device and method are practical.
Detection model of the present invention is suitable for the hydrolysis pretreatment process of different raw materials (such as timber, bamboo, stalk).According to not
With the needs of testing result, selecting corresponding wavelength and equation coefficient to carry out operation be can be obtained.The detection model only has two
A equation coefficient m, n, the determination of the equation coefficient at least only need to have two groups of productions or experimental data and can acquire, this is for life
Produce during quickly establish detection model carry out production control it is particularly important, timeliness by force and it is at low cost.
This method has good practicability and very high accuracy, the online inspection to enterprise's hot water pre-hydrolysis technique effect
It surveys and control has important practical value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the detection device；
Wherein, 1-hydrolyzate sampling valve；2-crossing filtering devices；3-cleaning devices；4-cleaning solution reservoirs；5—
Buffer reservoir；6-cooling devices；7-pumps；8-pumps；9,10-cleaning fluid valves；11-buffer sampling valves；12—
Pump；13-sample preparation devices；14,16-waste collection slots；15-cuvettes；17-light sources；18-optical fiber；19-data processings dress
It sets.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.Unless stated otherwise, it is used in the embodiment of the present invention
The raw material and conventional use of method of raw material and method for this field regular market purchase.
Embodiment 1
A kind of on-line measuring device of biomass by hydro-thermal preprocessing process, including the pre-hydrolyzed solution being connect with reactor 100
Sampler, with the sequentially connected filter device 2 for purifying sample of pre-hydrolyzed solution pipeline, cooling device 6, for prehydrolysis
The sample preparation device 13 that liquid is mixed with buffer, spectrum detection device, and the data for data collection and detection model operation
Processing unit (i.e. computer) 19；Sample preparation device 13 is connect with buffer reservoir 5 by buffer pipeline；It is additionally provided with and uses respectively
The metering pump of pre-hydrolyzed solution and buffer flow in sample preparation device 13 is flowed into detection.
Pre-hydrolyzed solution sampler is connected with the entrance of the device of reaction solution outer circulation.
It is additionally provided with pipeline washing device, pipeline washing device passes through cleaning with pre-hydrolyzed solution pipeline and buffer pipeline respectively
The connection of liquid pipe road.Pipeline washing device includes cleaning solution reservoir 4, the pump being arranged in cleaning fluid pipe 8 and valve 9,10.
Pre-hydrolyzed solution pipeline and buffer pipeline are respectively equipped with pump 7,12, valve 1,11.Pump 7 and pump 12 are metering pump.
The junction of cleaning fluid pipe and buffer pipeline is located between the valve 11 on buffer pipeline and pump 12.Cleaning fluid pipe with
The junction of pre-hydrolyzed solution pipeline is on the pipeline between filter device 2 and cooling device 6.
Filter device 2 is crossing filtering device, and crossing filtering device is connect with cleaning device 3.
Sample preparation device 13 is mixing arrangement, is equipped with triple valve or quantitative loop, six-way valve in sample preparation device 13.Sample preparation device 13
Helix tube current stabilization mixing arrangement is equipped between spectrum detection device.
Spectrum detection device includes floating cuvette 15, light source 17, optical fiber 18 and spectrum sensor (such as CCD, CMOS etc.),
The light path of floating cuvette is 2mm~5cm.Light source is the double-colored light source of diode.
PH value detection device is equipped in sample preparation device；Sampler, filter device 2, cooling device 6 or pre-hydrolyzed solution pipeline
Equipped with pH value detection device.
The floating cuvette 15 of sample preparation device 13 and spectrum detection device is separately connected waste collection slot 14,16.
A kind of detection method of the on-line measuring device of above-mentioned biomass by hydro-thermal preprocessing process, comprising the following steps:
S1. pre-hydrolyzed solution sample is taken out from biomass water heat pretreatment reactor, it is molten with buffering after being filtered, being cooled down
Liquid is mixed in sample preparation device 13 in proportion, obtains sample to be tested；
S2. the sample to be tested in S1 is subjected to online spectral detection after current stabilization mixing arrangement, and it is pre- to record t moment
The absorbance of hydrolyzate and reference liquid at wavelength θ 1 and θ 2；
S3. the absorbance obtained in S2 and pre-hydrolyzed solution ratio are fitted modeling and obtain detection model, with detection mould
Type calculates separately to obtain the pretreated prehydrolysis yield of biomass by hydro-thermal, cellulose and hemicellulose removal rate.
Wherein, S1. is mixed in proportion with buffer solution；The mixed proportion of buffer solution and hydrothermal pretreatment liquid is adopted
It is controlled with the metering pump of the two, which must meet absorbance signal value of the spectroscopic detector at θ 1 0.05-2.0's
In range, and minimum mixed proportion is determined according to the difference between itself pH value of the actual pH and buffer solution of solution after mixing
Fixed, the two deviation is in 0.25 pH value unit.
Specifically, detection model are as follows:
In formula, Y-- prehydrolysis yield, cellulose or hemicellulose removal rate, %；M, n-- equation coefficient, %；The pre- water of D--
Solve liquor ratio, m3/t；VD、VP-- buffering flow quantity and pre-hydrolyzed solution flow, mL/min；At,θ1、A0,θ1-- t moment pre-hydrolyzed solution and ginseng
Than absorbance of the liquid at wavelength θ 1, dimensionless；At,θ2、A0,θ2-- the extinction of t moment pre-hydrolyzed solution and reference liquid at wavelength θ 2
Degree, dimensionless.
Wherein, the ratio that buffer and pre-hydrolyzed solution mix in S1 are as follows: buffering flow quantity is 5~500mL/min；Prehydrolysis
Flow quantity is 0.1~10mL/min.
For wavelength θ 1 used by the spectroscopic detector used for 220~450nm, wavelength θ 2 is 450~900nm.
Pre-hydrolyzed solution ratio is 1.0~30.0L/kg；Equation coefficient m is that -50~40, n is 5~95.The coefficient of equation uses
The sampling of preprocessing process different time points solid-liquid, the method for combination with standard method quantitative detection are determining.
The invention establishes pre-hydrolyzed solution than the pass with prehydrolysis yield, cellulose and hemicellulose removal rate
System, the acquisition prehydrolysis that has been applicable to that the absorbance by producing known pre-hydrolyzed solution ratio and pre-hydrolyzed solution is established obtain
The detection model of rate, cellulose and hemicellulose removal rate has very high accuracy, accuracy, greatly simplifies pre-
The relationship between indexs and manufacturing condition such as hydrolyzate yield, detection efficiency greatly improve, and device and method are practical.
Detection model of the present invention is suitable for the hydrolysis pretreatment process of different raw materials (such as timber, bamboo, stalk).According to not
With the needs of testing result, selecting corresponding wavelength and equation coefficient to carry out operation be can be obtained.Only there are two sides for detection model
Journey Coefficient m, n, the determination of equation coefficient at least only need to have two groups of productions or experimental data and can acquire, this is in production process
Quickly establish detection model carry out production control it is particularly important, timeliness by force and it is at low cost.
In conjunction with this detection device, more specifically detecting step is as follows:
1. detection device brings into operation, when non-test sample, pump 7,8 is closed, and valve 1,9,10 is closed, valve 11 and pump 12
It opens.
2. buffer enters sample preparation device 13 (flow velocity 5-500mL/min) through valve 11 and pump 12, flowed through sample preparation device 13
Enter floating cuvette 15 after out, finally enters waste collection slot 16.
3. spectrum detection device is issued the optical signal of Single wavelength or multi-wavelength (200nm-600nm) by light source 17, through optical fiber
The optical signal value of liquid in 18 detection floating cuvettes 15, and record (is no less than 6 per minute in real time by data processing equipment 19
Data point) flow into floating cuvette in liquid optical signal value.
4. when pair pretreatment fluid sample detection, sampling valve 1 is opened, the pretreatment fluid in reactor is through crossing filtering device 2
The solid particle in prepare liquid is removed after processing, crossing filtering device carries out periodic purge using cleaning device 3.
5. filtered pretreatment fluid enters in cooling device 6, fluid temperature is cooled to 100 DEG C hereinafter, and making through pump 7
Pretreatment fluid can be certain flow velocity (0.1~10mL/min) enter sample preparation device 13.
6. pretreatment fluid directly mixes in sample preparation device with buffer, simultaneously when in sample preparation device using directly mixing
Into floating cuvette 15；When using pulse mixing in sample preparation device, pretreatment fluid first passes through the quantitative loop in sample preparation device
(0.1mL~5mL) enters waste liquid tank 14, and the pretreatment fluid when the switching of sample preparation device inner valve in quantitative loop is loaded by buffer
To floating cuvette 15.
7. the optical signal value that data processing equipment 19 will test is recorded, calculated by the detection model pre-established
After the completion, provide biomass half cellulose, cellulose corresponding to hydrothermal pretreatment liquid and yield as a result, to realize to life
The on-line checking of substance hydrothermal pretreatment process.
8. when detection is completed or the blank signal value of buffer significantly increases, valve 1,11 is closed, buffer and pre- place
Liquid is managed to stop entering detection system；Valve 9,10 open, pump 8 open, cleaning solution by cleaning solution reservoir 4 enter cooling device 6,
Pump 7 and 12, sample preparation device 13, floating cuvette 15 finally enter waste collection slot 16；Data processing equipment detects resulting light
When signal value and blank signal value do not have significant difference, cleaning process terminates, and all components stop working, and terminates detection.
Embodiment 2
The present embodiment selects the biomass water Grape berry workshop section of 4 bench scales to be implemented, and installs the present invention and implements
On-line measuring device in example 1, and carry out on-line checking.Meanwhile corresponding pre-hydrolyzed solution sample is left and taken by ASTM E1758
(2015) standard detecting method is detected in laboratory.
The process conditions of the biomass water Grape berry workshop section of 4 bench scales are as follows:
Table 1
The determination of equation coefficient the following steps are included:
S11. at least two pre-hydrolyzed solution samples left and taken is taken to test by ASTM E1758 (2015) standard detecting method
Interior is detected, and prehydrolysis yield, cellulose and the hemicellulose level removal rate of each sample are obtained.
S12. it by each experimental result, pre-hydrolyzed solution ratio and the substitution detection model such as wavelength θ 1 and θ 2 in S11, is asked
Solution obtains each experimental result corresponding equation coefficient m, n.
Detection wavelength θ 1 and θ 2 is as shown in table 2:
Table 2
Equation coefficient is as shown in table 3:
Table 3
The verifying of detection method accuracy
Using on-line measuring device and detection method of the invention to the hydrothermal pretreatment technique of the table 1 of 4 bench scales
Each index detected, and detected in laboratory by ASTM E1758 (2015) standard detecting method, testing result
As shown in table 4.As shown in Table 4, on-line measuring device of the invention and detection method testing result accuracy obtained and essence
True property is suitable with existing off-line checking method, but the timeliness sexual clorminance incomparable with existing off-line checking method.
Table 4
Claims (10)
1. a kind of on-line measuring device of biomass by hydro-thermal preprocessing process, which is characterized in that pre- including what is connect with reactor
Hydrolyzate sampler, with the sequentially connected filter device for purifying sample of pre-hydrolyzed solution pipeline, cooling device, for pre-
The sample preparation device that hydrolyzate is mixed with buffer, spectrum detection device, and the number for data collection and detection model operation
According to processing unit；The sample preparation device is connect with buffer reservoir by buffer pipeline；Be additionally provided be respectively used to detection and
Control flows into metering pump, flowmeter and the solenoid valve of pre-hydrolyzed solution and buffer flow in sample preparation device；
The hydrothermal pretreatment technique for being 1.0-2.5L/kg for liquor ratio, the sample preparation device are pulse mixing arrangement, the sample preparation
Quantitative loop and six-way valve are equipped in device；The hydrothermal pretreatment technique for being 2.5-20L/kg for liquor ratio, the sample preparation device are
Triple valve direct mixer；The spiral pipeline of current stabilization immixture is equipped between the sample preparation device and spectrum detection device；
PH value detection device is equipped in the sample preparation device.
2. the on-line measuring device of biomass by hydro-thermal preprocessing process according to claim 1, which is characterized in that be additionally provided with pipe
Road cleaning device, the pipeline washing device are connect with pre-hydrolyzed solution pipeline and buffer pipeline by cleaning fluid pipe respectively；
The pipeline washing device includes cleaning solution reservoir, the pump and valve that are arranged in cleaning fluid pipe.
3. the on-line measuring device of biomass by hydro-thermal preprocessing process according to claim 2, which is characterized in that the filtering
Device is crossing filtering device, and the crossing filtering device is connect with cleaning device.
4. according to the on-line measuring device of biomass by hydro-thermal preprocessing process described in claim 2~3 any one, feature exists
In the sample preparation device and spectrum detection device are separately connected waste collection slot.
5. the on-line measuring device of biomass by hydro-thermal preprocessing process according to claim 4, which is characterized in that the pre- water
Xie Yeguandao and buffer pipeline are respectively equipped with pump, valve.
6. the on-line measuring device of biomass by hydro-thermal preprocessing process according to claim 5, which is characterized in that the pump is
Metering pump；The valve is solenoid valve；The solenoid valve is connect with flowmeter with data processing equipment.
7. the on-line measuring device of biomass by hydro-thermal preprocessing process according to claim 5, which is characterized in that the cleaning
The junction of liquid pipe road and buffer pipeline is located between the valve and pump on buffer pipeline；The cleaning fluid pipe and pre- water
The junction of Xie Yeguandao is on the pipeline between filter device and cooling device.
8. the detection side of the on-line measuring device of biomass by hydro-thermal preprocessing process described in any one according to claim 1~7
Method, which comprises the following steps:
S1. pre-hydrolyzed solution sample is taken out from biomass water heat pretreatment reactor to press after being filtered, being cooled down with buffer solution
Ratio mixes in the sample preparation device, obtains sample to be tested；
S2. the sample to be tested in S1 is subjected to online spectral detection after the spiral pipeline, and records t moment prehydrolysis
The absorbance of liquid and reference liquid at wavelength θ 1 and θ 2；
S3. the absorbance obtained in S2 and pre-hydrolyzed solution ratio are fitted modeling and obtain detection model, with detection model point
The pretreated prehydrolysis yield of biomass by hydro-thermal, cellulose and hemicellulose removal rate are not calculated；Buffer solution and pre- water
The mixed proportion of solution liquid sample is controlled using the metering pump or flowmeter of the two with solenoid valve, which must meet spectrum inspection
Absorbance signal value of the device at θ 1 is surveyed in the range of 0.05-2.0, and minimum mixed proportion is according to the reality of solution after mixing
Difference between pH value and buffer solution itself pH value determines that the two deviation is in ± 0.25 pH value unit.
9. the method for the on-line measuring device of biomass by hydro-thermal preprocessing process according to claim 8, which is characterized in that S1
The ratio of middle buffer and pre-hydrolyzed solution mixing are as follows: buffering flow quantity is 5~500mL/min；Pre-hydrolyzed solution flow be 0.1~
10mL/min。
10. the method for the on-line measuring device of biomass by hydro-thermal preprocessing process according to claim 8, which is characterized in that
For wavelength θ 1 used by the spectroscopic detector used for 220~450nm, wavelength θ 2 is 450~900nm.
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