CN108982281A - A kind of coke breeze absorption VOCs method of evaluating performance and system based on air flow bed - Google Patents
A kind of coke breeze absorption VOCs method of evaluating performance and system based on air flow bed Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
Abstract
This disclosure relates to which a kind of coke breeze absorption VOCs method of evaluating performance and system, the system based on air flow bed includes at least: for providing the feeding system of coke breeze；Temperature control heat-insulation system；Duct type adsorptive reactor in temperature control heat-insulation system is provided with sample tap on the duct type adsorptive reactor, and connect with the feeding system；Adsorbate Gas generation system, the system includes that sequentially connected several are used to contain gas cylinder, the instrument for controlling gas cylinder flow, VOCs steam generating device and the corresponding gas path pipe of Adsorbate Gas, and the Adsorbate Gas generation system is connected with duct type adsorptive reactor；And the gas-solid separating device for separating coke breeze and Adsorbate Gas.Coke breeze adsorption test is carried out using the system, test analysis is carried out to gained coke sample, the coke breeze rate of adsorption is calculated to evaluate coke breeze absorption VOCs performance according to the variation of burnt sample VOCs adsorbance.
Description
Technical field
The disclosure belongs to environment protection field, specifically, a kind of coke breeze based on air flow bed adsorbs VOCs method of evaluating performance
And system.
Background technique
Here statement only provides background information related with the disclosure, without necessarily constituting the prior art.
VOCs (Volatile organic compounds) is that a kind of common atmosphere pollution is mainly derived from factory
The exhaust gas of discharge mainly includes acetone, toluene, phenol, dimethylaniline, formaldehyde, n-hexane, ethyl acetate, ethyl alcohol etc..VOCs
It is the key precursor object that PM2.5 and ozone are formed, has physiological-toxicity, environmental and human health impacts is endangered huge.Therefore, for
The prevention and treatment of VOCs is particularly significant.
Activated coke/charcoal is a kind of carbonaceous adsorbent material with abundant pore structure and huge specific surface area, it, which has, inhales
Attached ability is strong, chemical stability is good, mechanical strength is high, and the features such as can facilitate regeneration, VOCs through activated carbon adsorption it is available compared with
Good clean-up effect.Activated coke/the charcoal applied in industrial production and life is generally the graininess of 5~9mm of diameter or column is lived
Property it is burnt, manufacturing process is complicated, expensive, mechanical loss is larger, limits the popularization and application of activated coke.Applicant is in patent
Number for CN103224235A " a kind of that the desulfurization technique and device of powder activated coke is quickly prepared using coal dust " middle proposition
Technology power plant's original position coal dust can be used for raw material, using hot fume as reaction medium, realize that powdery is living in air upflow bed
Property burnt quick preparation, which greatly reduces the preparation cost of activated coke.Powdered activated coke equally has complicated
Pore structure and higher specific surface area, can be used for the adsorbing and removing of a variety of vapor phase contaminants；Simultaneously because coke breeze is with smaller
Average grain diameter, can be preferably mixed with adsorbate in adsorption process, substantially improve mass transfer condition, absorption speed
It is better than granulated activated coke/charcoal in the performances such as rate.And what inventor knew is used to evaluate conventional particles shape activated coke absorption property
Fixed-bed type absorber be mainly used for test a period of time in activated coke adsorption capacity, due to cannot exclude the shadow of external diffusion
It rings, it is difficult to measure the rate of adsorption of activated coke, thus comprehensively the absorption property of powdered activated coke cannot be evaluated.Therefore
Powdered activated coke has not been suitable for for traditional evaluation method of granulated activated burnt absorption property, it is necessary to be invented one kind and is directed to
The evaluation system of powdered activated coke absorption property.
Summary of the invention
In view of the above problems, the disclosure on Research foundation before, proposes that a kind of powdery based on ducted air bed is living
Property coke absorption VOCs method of evaluating performance and system, can be used for testing the powdered activated coke of different types of coal, different-grain diameter in difference
The rate of adsorption under the adsorbate air-flow entrainment of concentration changes with time.
The disclosure the technical solution adopted is as follows:
Firstly, providing the reaction of coke breeze fluidization absorption VOCs a kind of in one of the disclosure or some embodiments
System includes at least:
For providing the feeding system of coke breeze；
Temperature control heat-insulation system；
Duct type adsorptive reactor in temperature control heat-insulation system is provided at least on the duct type adsorptive reactor
Two sample taps, and connect with the feeding system；
Adsorbate Gas generation system, the system include that sequentially connected several are used to contain the gas of Adsorbate Gas
Bottle, the instrument for controlling gas cylinder flow, VOCs steam generating device and corresponding gas path pipe, the Adsorbate Gas produce
Raw system is connected with duct type adsorptive reactor；And
For separating the gas-solid separating device of coke breeze and Adsorbate Gas.
Secondly, a kind of coke breeze absorption VOCs method of evaluating performance is provided in one of the disclosure or some embodiments,
The following steps are included:
Powdered activated coke is passed through simultaneously into duct type adsorptive reactor and is entrained with the Adsorbate Gas of VOCs, and powdery is living
Property coke setting adsorption temp and setting adsorption density under VOCs is adsorbed, respectively obtain sample tap obtain sample and
Sample tap obtains the time of sample, detects the quality of different sample tap sample absorption VOCs, obtains sample according to two sample taps
The quality difference value and two sample taps of adsorbing VOCs obtain the time difference of sample, can be obtained region between two sample taps
The rate of powdered activated coke absorption VOCs.
What the one of technical solution of the disclosure obtained has the beneficial effect that:
The adsorption reaction system based on air flow bed provided using the disclosure and corresponding coke breeze absorption VOCs performance are commented
Valence method can obtain the rate of powdered activated coke absorption VOCs under different operating conditions in fluidization adsorption process, can also draw
Out in fluidization adsorption process under different operating conditions powdered activated coke absorption VOCs rate with adsorption time change curve, thus
One intuitive evaluation is carried out to the absorption property of coke breeze, is the application in industrial production and life for technical support.
Detailed description of the invention
The Figure of description for constituting disclosure a part is used to provide further understanding of the disclosure, the signal of the disclosure
Property embodiment and its explanation for explaining the disclosure, do not constitute the improper restriction to the disclosure.
Fig. 1 is the system schematic of one of the disclosure or some embodiments；
Fig. 2 is the structure chart of coiled pipe adsorptive reactor；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the bottom view of Fig. 2；
Wherein, 1, High Purity Nitrogen gas cylinder；2, high purity oxygen gas bottle；3, high-purity carbon dioxide gas cylinder；4, mass flow controller；5,
Toluene vapor generating device；6, peristaltic pump；7, reagent bottle；8, toluene；9, Mini-type spiral batcher；10, coke breeze；11, coiled pipe
Adsorptive reactor；12, feed bin；13, gas heater；14, Adsorbate Gas entrance；15, feeding inlet；16, Venturi tube；17,
Adsorptive reactor main pipeline；18, reducer pipe；19, T-type triple valve；20-29, sample tap；30, heating furnace；31, miniature eddy flow
Device；32, rewinding bottle；33, tail gas；34, drexel bottle.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation and/or their combination.
Coke breeze and powdered activated coke in the disclosure are same meaning.
VOCs in the disclosure refers to one or more mixed volatile organic matters.
As described in background technique, the fixed bed for the conventional particles shape activated coke absorption property that inventor is known
There is certain deficiency in the method and system that formula absorber is used to evaluate the absorption VOCs performance of powdered activated coke, in consideration of it, at this
In disclosed one or some typical embodiments, the reaction system of coke breeze fluidization absorption VOCs a kind of is provided, is at least wrapped
It includes:
For providing the feeding system of coke breeze；
Temperature control heat-insulation system；
Duct type adsorptive reactor in temperature control heat-insulation system is provided at least on the duct type adsorptive reactor
Two sample taps, and connect with the feeding system；
Adsorbate Gas generation system, the system include that sequentially connected several are used to contain the gas of Adsorbate Gas
Bottle, the instrument for controlling gas cylinder flow, VOCs steam generating device and corresponding gas path pipe, the Adsorbate Gas produce
Raw system is connected with duct type adsorptive reactor；And
The gas-solid separating device for being used to separate coke breeze and Adsorbate Gas being connected with the sample tap.
In one of the disclosure or some embodiments, the coke breeze fluidization adsorption reaction system further includes at tail gas
Manage device.
In one of the disclosure or some embodiments, Adsorbate Gas generation system further includes the reagent for containing VOCs
Bottle and peristaltic pump, the reagent bottle are connected by peristaltic pump with the VOCs steam generating device, and peristaltic pump is inhaled from reagent bottle
VOCs provides the VOCs of regime flow for VOCs steam generating device.
In one of the disclosure or some embodiments, the VOCs steam generating device is a cylindrical metal shell
Body, heating method are electric heating wire heating, and inside is equipped with thermal storage ceramic, and the VOCs drop sent by peristaltic pump drips to red-hot state
Thermal storage ceramic surface, that is, flash evapn is VOCs steam.
In the disclosure, the specific structure of the feeding system is not particularly limited, and can be used in the feed of coke breeze.
In one of the disclosure or some embodiments, the feeding system includes screw(-type) feeder and related gas path pipe, is used for
The feed of coke breeze and/or preheating.
It is described including being sequentially connected in series inside the temperature control heat-insulation system in one of the disclosure or some embodiments
VOCs steam generating device, gas heater and duct type adsorptive reactor.Wherein, the VOCs steam generating device is simultaneously
Has the function of mixed gas.
Wherein, gas heater is the device that can be mixed gas heating.
In other some embodiments, the VOCs steam generating device can also be located at temperature control heat-insulation system
It is external.
In one of the disclosure or some embodiments, the main body of the temperature control heat-insulation system is heating furnace, for inhaling
The preheating of attached matter gas and the temperature control of duct type adsorptive reactor.The heating method of heating furnace includes but not just for resistance wire
The heating of air radiation formula.
Further, the inside heating furnace includes the VOCs steam generating device, the gas heater being sequentially connected in series
With duct type adsorptive reactor.
Further, the outside of the heating furnace includes heat preservation shell, and the heat preservation shell is light-duty mullite fiber guarantor
Warm thermal insulation board.
In one of the disclosure or some embodiments, the duct type adsorptive reactor is by several vertical tubes, curved
The snakelike formula single-pass pipeline (or coiled pipe adsorptive reactor) of head and T type triple valve composition, entrance is entered by Adsorbate Gas
Mouth and powdered activated coke material inlet (i.e. feeding inlet 15 in figure) are constituted, and each T-type triple valve respectively corresponds a sample tap, are sampled
Mouth connection gas-solid separating device.
Further, the outlet of the snakelike formula single-pass pipeline also corresponds to a sample tap.
Further, the Adsorbate Gas entrance and powdered activated coke material inlet are adsorbed by Venturi tube and duct type
The main pipeline of reactor is connected.
Further, powdered activated coke blocking pipeline in order to prevent, influences detection accuracy, and the vertical tube lower part is equipped with contracting
The reducer pipe of gauge structure.
Further, the sample time of sample tap is controlled for convenience, and pipeline is equidistant between adjacent samples mouth.
The gas cylinder includes but is not limited only to High Purity Nitrogen gas cylinder, high purity oxygen gas bottle and/or high-purity carbon dioxide gas cylinder etc.,
The type of gas in gas cylinder can be determined according to specific operating condition to be simulated.
The coiled pipe adsorptive reactor that the disclosure uses belongs to the device of laboratory scale, and construction cost is lower, to place
The requirement in space is lower, provides a kind of higher method of feasibility to the evaluation of coke breeze fluidization absorption property to realize.
In one of the disclosure or some embodiments, the instrument for controlling gas cylinder flow is mass flow control
Device or spinner flowmeter processed.
In one of the disclosure or some embodiments, the gas-solid separating device is for Adsorbate Gas and coke breeze
First separation, main body are a cyclone, and the gas vent of cyclone is connected with exhaust gas processing device.
In one of the disclosure or some embodiments, the exhaust gas processing device is for coke breeze and Adsorbate Gas
The absorption of pollutant in secondary separation and Adsorbate Gas.
Further, the exhaust gas processing device is the drexel bottle for containing absorbent.
In one of the disclosure or some embodiments, a kind of coke breeze fluidization adsorption reaction system, the system are provided
Including Adsorbate Gas generation system, feeding system, temperature control heat-insulation system, duct type adsorptive reactor, gas-solid separating device and
Exhaust gas processing device；Wherein, the gas path pipe outlet of the Adsorbate Gas generation system and duct type adsorptive reactor gas
Entrance is connected；The feeding system main body is screw(-type) feeder, and discharge port is connected with duct type adsorptive reactor material inlet；Institute
Stating temperature control heat-insulation system main body is heating furnace, and integrated gas preheater, VOCs steam generating device and duct type absorption are anti-in furnace
Answer device；The sample tap of the duct type adsorptive reactor connects gas-solid separating device；The gas-solid separating device main body is eddy flow
Device, cyclone gas vent are connected with exhaust gas processing device.Coke breeze adsorption test is carried out using the system, gained coke sample is carried out
Test analysis calculates the coke breeze rate of adsorption according to the variation of burnt sample VOCs adsorbance to comment coke breeze absorption VOCs performance
Valence.
In another or some typical embodiments of the disclosure, a kind of coke breeze absorption performance evaluation side VOCs is provided
Method, comprising the following steps:
Powdered activated coke is passed through simultaneously into duct type adsorptive reactor and is entrained with the Adsorbate Gas of VOCs, and powdery is living
Property coke setting adsorption temp and setting adsorption density under VOCs is adsorbed, respectively obtain sample tap obtain sample and
Sample tap obtains the time of sample, detects the quality of different sample tap sample absorption VOCs, obtains sample according to two sample taps
The quality difference value and two sample taps of adsorbing VOCs obtain the time difference of sample, can be obtained region between two sample taps
The rate of powdered activated coke absorption VOCs.
The disclosure is in such a way that high speed adsorbate air-flow carries micro powdered activated coke secretly, in constant adsorption density gas
Under powdered activated coke equivalent proportion in atmosphere, extremely low, using the length of adsorption reaction pipe in control duct type adsorptive reactor come real
Now to the control of adsorption time, so as to calculate the activated coke rate of adsorption after excluding external diffusion influence.
In a specific embodiment of the disclosure, the particle size range of the coke breeze is 20~500 μm.
In a specific embodiment of the disclosure, in order to preferably evaluate the performance of coke breeze absorption VOCs, obtain
The sample tap of sample is all sample taps of duct type adsorptive reactor, and the matter of sample absorption VOCs is sampled according to neighboring samples mouth
It measures difference and adjacent samples mouth obtains the time difference of sample, the average adsorption rate of VOCs in respective section is calculated, according to not
The rate versus time curve of activated coke absorption VOCs is drawn with the average adsorption rate of the VOCs in section.Using adjacent
Sample tap calculating can obtain most rate of adsorption calculated result.
In a specific embodiment of the disclosure, to improve detection accuracy, in duct type adsorptive reactor
Activated coke equivalent proportion is 0.08~0.12, and the activated coke equivalent proportion, which refers to, enters duct type adsorptive reactor in the unit time
Powdered activated coke quality with can the adsorbate that enter duct type adsorptive reactor in the unit time be adsorbed completely and be reached just
The mass ratio of the powdered activated coke of adsorption saturation.
In a specific embodiment of the disclosure, powdered activated coke is sieved and obtains the powdered activated of different-grain diameter
Coke selects the powdered activated coke of wherein specified particle diameter range, by the powdered activated coke input channel formula adsorption reaction of selected partial size
Device.
In a specific embodiment of the disclosure, gas velocity is 4~16m/s.
In a specific embodiment of the disclosure, adsorption temp is set as 100~150 DEG C.It is dense to set adsorbate
Degree can be prepared according to specific operating condition.
In a specific embodiment of the disclosure, a kind of coke breeze absorption VOCs method of evaluating performance is specifically included
Following steps:
(1) powdered activated coke to be measured is sieved to obtain the coke breeze particle of different-grain diameter；
(2) adsorption test is carried out to the coke breeze of selected partial size under setting adsorption temp, setting adsorption density, obtained respectively
Obtain the time of sample and sample tap acquirement sample that sample tap obtains；Wherein, adsorption temp passes through temperature control heat-insulation system and gas
Heater is set, and adsorption density is prepared by each gas cylinder；
(3) gained sample is put into organic solvent, the VOC adsorbed in sample is made to be completely dissolved into organic solvent, separation is solid
The concentration that VOCs in organic solvent is measured after body, calculates the adsorption capacity of VOCs in the sample；It is obtained according to adjacent samples mouth
Sample VOCs adsorbance difference and adjacent material taking mouth discharging time difference calculate the speed of the VOCs average adsorption in respective section
Rate, calculation formula are as follows:
In formula:
Vn: coke breeze VOC average adsorption rate in n-th of adsorption zone, unit: mg/ (gs)；
Note: n indicates positive integer, and those skilled in the art can n value determines according to actual conditions；
S1: target zone front end unit mass sample VOC adsorbance, unit: mg；
S2: target zone rear end unit mass sample VOC adsorbance, unit: mg；
t1: target zone front end discharging time, unit: s；
t2: target zone rear end discharging time, unit: s；
(4) according to the operating condition and step (3) the data obtained of step (2) selection, powdered activated coke under different operating conditions is drawn out
The rate of VOCs is adsorbed with the change curve of adsorption time；Alternatively, using coke breeze of different nature under some specific operating condition
Carry out adsorption test, the pore structure and surface chemistries for probing into powdered activated coke are verified the influence of its rate of adsorption.
In one or some of disclosure embodiment, the particle size range of the coke breeze is 20~500 μm.
In the disclosure, the operating condition refers to the working condition of coke breeze in practical applications, including cigarette present in VOCs
The constituent of gas in temperature degree and environment；Wherein, flue-gas temperature can be realized by temperature control heat-insulation system, the composition of gas at
Dividing can be prepared by gas cylinder, and the operating condition of simulation coke breeze is realized by operating above.
In order to enable those skilled in the art can clearly understand the technical solution of the disclosure, below with reference to tool
The technical solution of the disclosure is described in detail in the embodiment of body.
Embodiment 1
In conjunction with attached drawing 1~4, a kind of reaction system of coke breeze fluidization absorption VOCs, including Adsorbate Gas generation system,
Feeding system, temperature control heat-insulation system, coiled pipe adsorptive reactor, gas-solid separating device and exhaust gas processing device.
The Adsorbate Gas generation system includes using polyfluortetraethylene pipe or the sequentially connected gas cylinder (High Purity Nitrogen of silicone tube
Gas cylinder 1, high purity oxygen gas bottle 2, high-purity carbon dioxide gas cylinder 3), mass flow controller 4 and toluene vapor generating device 5, and adopt
Inhaling toluene from reagent bottle 7 with peristaltic pump 6 is that toluene vapor generating device 5 provides the toluene of regime flow.
The toluene vapor generating device 5 is a cylindrical metal shell, is heated with electric heating wire, and inside is equipped with appropriate
Thermal storage ceramic, by the toluene that peristaltic pump 6 is sent drip to red-hot state thermal storage ceramic surface i.e. flash evapn be toluene vapor.
The feeding system main body is a Mini-type spiral batcher 9, for sending coke breeze 10 by certain delivery rate
Enter coiled pipe adsorptive reactor 11, carries hermetically sealed feed bin 12, it can be achieved that positive pressure is fed.
The temperature control heat-insulation system is made of a heating furnace 30, heating bore size: 0.4*0.6*3 meters, heating method
For the heating of resistance wire air radiation formula, shell heat preservation is done using light-duty mullite fiber thermal insulation thermal insulation board；Inside heating furnace is successively
Series connection toluene vapor generation device 5, gas heater 13 and coiled pipe adsorptive reactor 11.
For 11 structure of coiled pipe adsorptive reactor as shown in attached drawing 2~4, reactor whole design is stainless by 316L
Steel is made into, high 2.36m, long 0.5m, wide 0.26m；Adsorbate Gas gas coming through heater 13 is heated to temperature needed for adsorption reaction
After degree, entered by Adsorbate Gas entrance 14, and carries the coke breeze 10 entered by feeding inlet 15 secretly after the mixing of Venturi tube 16
Into adsorptive reactor main pipeline 17；Reactor body pipeline totally 23 vertical tubes, vertical tube internal diameter 20mm, to prevent coke breeze anti-
Device bottom is answered to accumulate and reducer pipe 18 is set, lower part elbow internal diameter 8mm；The high 2m of every vertical tube, overall length (are free of elbow)
46m has 9 T-type triple valves 19 along journey, is correspondingly provided with 10 sample tap 20-29.
The gas-solid separating device main body is a microclone 31, is sequentially connected 10 sample tap 20-29, will sample
Mouthful Adsorbate Gas come out and coke breeze 10 are separated, and the coke breeze separated falls into rewinding bottle 32, unsegregated coke breeze and
Tail gas 33 enters the drexel bottle 34 equipped with commercial active carbon and is handled by further absorption.
Embodiment 2
In conjunction with attached drawing 1~4, a kind of coke breeze absorption VOCs method of evaluating performance, comprising the following steps:
One, prepare part:
(1) powdered activated coke to be measured is sieved to obtain the coke breeze particle of different-grain diameter (50~200 μm)；
(2) coke breeze of a certain partial size to be detected is poured into the feed bin 12 of Mini-type spiral batcher 9, it is electromechanical to open feed
Machine is demarcated (10g/h) to feeding coal；
(3) power supply for opening toluene vapor generating device 5 and air preheater 13 is opened after temperature reaches setting value
Peristaltic pump 6 sets toluene flux and opens the preparation that each gas cylinder carries out Adsorbate Gas: according to adsorbate needed for different operating conditions
Each component concentration (O in gas2: 6%；CO2: 12%；Toluene: 1000mg/m3；N2: Balance Air) it is calculated, set each matter
Measure the aperture of flowmeter 4；
(4) 30 heating power supply of heating furnace is opened, after temperature reaches setting value, by batcher discharge port and Adsorbate Gas gas
Way outlet is partially connected with reactor inlet (Adsorbate Gas entrance 14 and feeding inlet 15), is passed through Adsorbate Gas；
(5) it opens batcher motor and carries out adsorption experiment.
Two, experimental section:
(1) microclone 31, rewinding bottle 32 and drexel bottle 34 are connected with silicone tube, is successively taken according to sample tap number
Sample；
(2) silicone tube between sample tap 20-29 and microclone 31 is replaced before every sub-sampling, is replaced in drexel bottle 34
Commercial active carbon (if having absorbed saturation), with nitrogen purge rewinding bottle 32；
(3) 31 entrance of microclone and sample tap 20-29 are connected, the corresponding T-type triple valve of sample tap 20-28 is pulled
To sampling state, triple valve is turned back into original state after obtaining enough samples, sample in rewinding bottle 32 is poured into sampling bag, successively
Step (2), (3) are repeated, until completing the sampling work of 10 sample tap 20-29；
(4) each sample time calculates according to feeding coal, 31 separative efficiency of microclone and required sample quality
It determines.After the completion of sampling, Mini-type spiral batcher 9,5 power supply of peristaltic pump 6 and toluene vapor generating device are closed, gas circuit is switched
State is cleaned to pure nitrogen gas, after coke breeze is blown out reactor 11 entirely, is continued logical nitrogen 5 minutes or more, it is ensured that coiled pipe absorption
Noresidue Adsorbate Gas in reactor 11；
(5) gas heater 13 and 30 heating power supply of heating furnace are closed, each gas cylinder, computer and power supply are closed, terminates experiment.
The adsorption time of T-type triple valve (i.e. corresponding sample mouth) sampling is as shown in table 1:
The adsorption time of each sample tap of table 1 sampling
Three, test analysis part:
(1) sampling bag equipped with sample will be sealed, and complete the dependence test experiment of sample as early as possible.
(2) sample of unit mass (1.0g) is put into the n-hexane of certain volume, sample is made after ultrasonication
The toluene of middle absorption is completely dissolved into n-hexane, and the concentration of toluene in supernatant measurement n-hexane is taken after centrifugation, toluene is calculated and exists
Adsorption capacity in unit mass sample.According to the toluene adsorbance difference of the sample of adjacent samples mouth acquirement and adjacent material taking mouth
Discharging time difference calculates the toluene average adsorption rate in respective section, and calculation formula is as follows:
In formula:
Vn: coke breeze toluene average adsorption rate in n-th of adsorption zone, unit: mg/ (gs)；
S1: target zone front end unit mass sample toluene adsorbance, unit: mg；
S2: target zone rear end unit mass sample toluene adsorbance, unit: mg；
t1: target zone front end discharging time, unit: s；
t2: target zone rear end discharging time, unit: s.
Above-described embodiment is the preferable embodiment of the disclosure, but embodiment of the present disclosure is not by above-described embodiment
It limits, made changes, modifications, substitutions, combinations, simplifications under other any spiritual essence and principles without departing from the disclosure,
It should be equivalent substitute mode, be included within the protection scope of the disclosure.
Claims (10)
1. VOCs reaction system is adsorbed in a kind of coke breeze fluidization, characterized in that include at least:
For providing the feeding system of coke breeze；
Temperature control heat-insulation system；
Duct type adsorptive reactor in temperature control heat-insulation system is provided at least two on the duct type adsorptive reactor
Sample tap, and connect with the feeding system；
Adsorbate Gas generation system, the system include that sequentially connected several are used to contain the gas cylinder of Adsorbate Gas, use
In instrument, VOCs steam generating device and the corresponding gas path pipe of control gas cylinder flow, the Adsorbate Gas generates system
System is connected with duct type adsorptive reactor；And
For separating the gas-solid separating device of coke breeze and Adsorbate Gas.
2. the system as claimed in claim 1, it is characterized in that: Adsorbate Gas generation system further includes the reagent bottle for containing VOCs
And peristaltic pump, the reagent bottle are connected by peristaltic pump with the VOCs steam generating device.
3. the system as claimed in claim 1, it is characterized in that: the feeding system includes screw(-type) feeder and related gas circuit pipe
Road.
4. the system as claimed in claim 1, it is characterized in that: including that the VOCs being sequentially connected in series steams inside the temperature control heat-insulation system
Gas generating device, gas heater and snakelike adsorptive reactor；
Further, the temperature control heat-insulation system main body is heating furnace；
Further, the outside of the heating furnace includes heat preservation shell, and the heat preservation shell is light-duty mullite fiber thermal insulation separation
Hot plate.
5. the system as claimed in claim 1, it is characterized in that: the duct type adsorptive reactor is by several vertical tubes, elbows
With the snakelike formula single-pass pipeline of T-type triple valve composition, entrance is made of Adsorbate Gas entrance and powdered activated coke material inlet,
Each T-type triple valve respectively corresponds a sample tap, and sample tap connects gas-solid separating device.
6. system as claimed in claim 5, it is characterized in that: the Adsorbate Gas entrance and powdered activated coke material inlet pass through
Venturi tube is connected with the main pipeline of duct type adsorptive reactor.
7. the system as claimed in claim 1, it is characterized in that: the main body of the gas-solid separating device is cyclone.
8. the system as claimed in claim 1, it is characterized in that: the coke breeze fluidization adsorption reaction system further includes vent gas treatment
Device.
9. a kind of evaluation method of the coke breeze absorption VOCs performance using system according to any one of claims 1 to 8, special
Sign is, comprising the following steps:
Powdered activated coke is passed through simultaneously into duct type adsorptive reactor and is entrained with the Adsorbate Gas of VOCs, powdered activated coke
VOCs is adsorbed under setting adsorption temp and setting adsorption density, obtains the sample and sampling that sample tap obtains respectively
Mouth obtains the time of sample, detects the quality of different sample tap samples absorption VOCs, obtains samples absorption according to two sample taps
The quality difference value of VOCs and two sample taps obtain the time difference of sample, can be obtained the powdery in region between two sample taps
The rate of activated coke absorption VOCs.
10. evaluation method as claimed in claim 9, it is characterized in that: the particle size range of the coke breeze is 20~500 μm；
Further, the activated coke equivalent proportion in duct type adsorptive reactor is 0.08~0.12；
Further, gas velocity is 4~16m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837630.2A CN108982281B (en) | 2018-07-26 | 2018-07-26 | Method and system for evaluating performance of adsorbing VOCs (volatile organic compounds) by using coke breeze based on entrained flow |
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