CN104785097B - VOC eliminates detection device and detection method thereof - Google Patents
VOC eliminates detection device and detection method thereof Download PDFInfo
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- CN104785097B CN104785097B CN201510044204.XA CN201510044204A CN104785097B CN 104785097 B CN104785097 B CN 104785097B CN 201510044204 A CN201510044204 A CN 201510044204A CN 104785097 B CN104785097 B CN 104785097B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
VOC eliminates detection device, including: at least one fixed-bed micro-reactor, there is air inlet and gas outlet；A plurality of gas piping, is connected with the air inlet selectivity of fixed-bed micro-reactor respectively by six-way valve；Wherein, described a plurality of gas piping includes that inorganic molecules contaminant gases pipeline, a plurality of pretreatment gas pipeline, carbon dioxide pipeline, gas-carrier pipeline and VOC supply line, described a plurality of pretreatment gas pipeline include oxygen pipeline, hydrogen pipeline and diluent gas pipeline；And gas chromatograph, connected with the gas outlet of fixed-bed micro-reactor by described six-way valve.Present invention also offers a kind of method utilizing above-mentioned elimination detection device detection VOC to eliminate.The elimination of this VOC detects device and detection method achieves activation of catalyst and VOC converts in one, and repacking is convenient, effectively raising efficiency, saving space, reduction cost.
Description
Technical field
The present invention relates to a kind of VOC and eliminate detection device and detection method thereof.
Background technology
VOC (Volatile Organic Compounds), is called for short VOCs,
Refer generally to that saturated vapour pressure is relatively low, hydrocarbon and their derivative readily volatilized under room temperature,
It it is the another main source of atmospheric pollution after NOx, SOx, small particle.Indoor volatility is organic
The main source of pollutant is: daily relevant with mankind's activity with ornament materials of construction material
Product and people's metabolite.VOCs is the most harmful for major part.By respiratory system or skin
After skin is absorbed, VOCs can to the hemopoietic system of people, nervous system, respiratory system and liver,
The organ such as kidney and eyes causes damage.When Human body package is in the environment containing high concentration VOCs
After reaching certain time, the VOCs of Heavy metal can destroy the central nervous system of people, god
Accumulate on film, directly result in human body anesthesia, poisoning even dead.But generally, due to environment
In VOCs concentration relatively low, its harm causing human body mostly is chronic lesion, as headache,
Nauseating, dizziness, red swelling of the skin, respiratory inflammation, nervous dysfunction, infant immunisation energy
Degradation under power.Many VOCs oneself be identified or suspect for carcinogen.Therefore, the most efficiently
Eliminate VOCs and raising indoor environmental quality becomes emphasis of concern, develop high efficiency
Scavenging material and Technology are imperative.
The purification treatment technology of organic exhaust gas can be broadly divided into two classes: recovery method and destructiveness side
Method.Recovery method refers to utilize the physicochemical property of VOCs self, it is separated from exhaust gas source
Reclaiming to re-use, main method has absorption process, absorption method, condensation method, membrane separation process etc..
Disruptive method refers to by the method such as chemistry, biology, light, plasma, by organic compound
Be converted into the environmental sound such as carbon dioxide, water or endanger relatively low material, mainly
Method has direct oxidation to burn, catalysis burning, biological treatment, photocatalysis Decomposition, low temperature etc. from
Son etc..Wherein Production by Catalytic Combustion Process have destruction thoroughly, non-secondary pollution, flow process relatively easy etc.
Feature, is a kind of preferably organic waste-gas purification means.Catalysis combustion applied in environmental project
Burning refers to that flammable VOCs reacts at catalyst surface generation Heterogeneous oxidation, generates CO2、
H2The process of O etc..When exhaust gas concentration is relatively low, current widespread practice is by Production by Catalytic Combustion Process
Combine with absorption method, first pass through Adsorption Concentration and improve the concentration of VOCs in waste gas, reach dimension
After the minimum calorific value of gas needed for holding combustion system requires, enter at catalytic combustion reactor purification
Reason.
Current existing VOC eliminates detection device and is generally not capable of carrying out simultaneously
Activation of catalyst and VOCs convert, and gas piping and fixed-bed micro-reactor are relatively fixed,
Can not switch flexibly.
Summary of the invention
It is an object of the invention to provide a kind of VOC and eliminate detection device, not only
Can carry out activation of catalyst simultaneously and VOCs converts, and reequip conveniently, gas piping is with solid
Fixed bed microreactor can switch flexibly.
It is another object of the present invention to improve a kind of VOC and eliminate detection method.
In order to solve the problems referred to above, the invention provides a kind of VOC and eliminate inspection
Survey device, comprising: at least one fixed-bed micro-reactor, there is air inlet and gas outlet；
A plurality of gas piping, by six-way valve respectively with the air inlet selectivity of fixed-bed micro-reactor even
Logical；Wherein, described a plurality of gas piping includes inorganic molecules contaminant gases pipeline, a plurality of
Pretreatment gas pipeline, carbon dioxide pipeline, gas-carrier pipeline and VOC supply
Pipeline, described a plurality of pretreatment gas pipeline is answered to include oxygen pipeline, hydrogen pipeline and carrier gas
Body pipeline, wherein, oxygen pipeline and hydrogen pipeline are selected with described six-way valve respectively by cross valve
Selecting property connects, and this VOC eliminates detection device and also includes the first three-way valve and the
Two three-way valve, the first three-way valve and the second three-way valve are respectively provided with the first valve port to the 3rd valve port,
First valve port of the first three-way valve and carbon dioxide pipeline and diluent gas pipeline connection, the one or three
Second valve port and the 3rd valve port of logical valve connect with described six-way valve respectively, the of the second three-way valve
One valve port connects with gas-carrier pipeline, the second valve port of the second three-way valve and VOC
Supply line connects, and VOC supply line connects with described six-way valve again,
3rd valve port of the first three-way valve also connects with the 3rd valve port of the second three-way valve；And gas phase color
Spectrometer, is connected with the gas outlet of fixed-bed micro-reactor by described six-way valve.
Wherein, every in inorganic molecules contaminant gases pipeline, a plurality of pretreatment gas pipeline
Article one, pretreatment gas pipeline, carbon dioxide pipeline, gas-carrier pipeline are respectively along airflow direction successively
Filter, mass flowmenter and check valve are arranged in series it.
Wherein, it is additionally included on VOC supply line and has for producing volatility
The generator of machine compound and the heater for heating generator, the air inlet of generator and load
Air pipe connects, and the gas outlet of generator then connects with VOC supply line.
Wherein, generator accommodates liquid volatile organic compound, and generator has anemostat,
The lower end of anemostat is stretched under liquid level, and the upper end of anemostat then forms the air inlet of generator.
Wherein, generator accommodates solid VOC, and generator has anemostat,
The lower end of anemostat extends on solid VOC, and the upper end of anemostat is then formed
The air inlet of generator.
Wherein, the heater for heating fixed-bed micro-reactor is also included.
Wherein, at least one fixed-bed micro-reactor described is two fixed-bed micro-reactors, often
The gas outlet of individual fixed-bed micro-reactor all connects with gas chromatograph.
Wherein, described six-way valve has the first to the 6th valve port, when sending out in fixed-bed micro-reactor
During raw catalytic reaction, VOC supply line and the first valve port of described six-way valve
Connection, the first valve port and the second valve port connect, wherein the second valve port again with fixed-bed micro-reactor
Air inlet connection, the 5th valve port and the 6th valve port connect, wherein the 5th valve port again with fixed bed
The gas outlet connection of microreactor, and the 6th valve port connects with gas chromatograph.
Wherein, described a plurality of gas piping also includes inert gas purge pipeline, when fixed bed is micro-
Before reactor occurs catalytic reaction or after catalyst clean activation, make inert gas purge
Pipeline connects with the 3rd valve port of six-way valve, the 3rd valve port and the connection of the 4th valve port, and the 4th
Valve port is directly communicated to air.
Present invention also offers a kind of VOC and eliminate detection method, including following
Step:
S1: choose pretreatment gas and open corresponding pretreatment gas pipeline, by pretreatment gas
Body is passed through fixed-bed micro-reactor, so that catalyst is carried out activation processing；
S2: open carrier gas gas circuit and oxygen gas circuit, and make carrier gas carry VOC
Gas and oxygen are directly entered gas chromatograph, gas chromatograph measure volatile organic
The original concentration of compound gas；
S3: the carrier gas and oxygen that carry VOC gas are passed through fixed bed
Microreactor carries out catalytic treatment；
S4: measure VOC gas after catalytic treatment by gas chromatograph
Concentration；
S5: by the original concentration of VOC gas and the concentration after catalysis,
Calculate the eradicating efficacy of VOC.
VOC according to the present invention eliminates detection device and detection method thereof, logical
Cross and configure a plurality of gas piping so that this detection device can according to VOCs gas to be converted,
Switched by control valve and control to connect gas with various pipeline neatly, work as volatile organic
Compound concentration is high or in the presence of multiple VOC, can improve transformation efficiency, have
Effect ground is saved space and reduces cost, improves conventional efficient and accuracy.Additionally, this device knot
Structure is simple, flexible and changeable.Further, this device includes 2 fixed-bed micro-reactors, with
Just can carry out 2 kinds of pollutant (that is: inorganic molecules pollutant and volatile organic simultaneously
Compound) catalyzed conversion experiment, effectively further save space and reduce cost, improve
Conventional efficient and accuracy.
Accompanying drawing explanation
Fig. 1 is that the structure of the VOC elimination detection device according to the present invention is shown
It is intended to；
Fig. 2 is the structural representation of the fixed-bed micro-reactor in Fig. 1；
Fig. 3 is the structure of the generator for liquid volatile organic compound and anemostat thereof
Schematic diagram；
Fig. 4 is the structural representation of the generator for solid VOC.
Detailed description of the invention
The VOC describing the present invention below in conjunction with the accompanying drawings in detail eliminates detection dress
Put.It will be appreciated by those skilled in the art that specific embodiments described below is only intended to solve
Release the present invention, be not intended to it is made any restriction.
Fig. 1 is the tool that the VOC according to the present invention eliminates detection device
Body embodiment.Include fixing as it is shown in figure 1, this VOC eliminates detection device
Bed microreactor, a plurality of gas piping and gas chromatograph 13.
Wherein, fixed-bed micro-reactor also known as packed bed reactor, be filled with solid catalyst or
Solid reactant is to realize a kind of reactor of heterogeneous reaction process.It is substantially U-shaped the shape of pipe
Shape, and it is respectively provided with air inlet and gas outlet at the two ends of U-tube, close in air inlet side
The position of bottom is provided with the catalyst placement section 21 for placing catalyst and silica wool etc.,
As shown in Fig. 2 (a).Preferably, for placing the pipe of the catalyst placement section 21 of catalyst
Footpath is more than the caliber of U-tube other parts, in order to place more catalyst and silica wool,
As shown in Fig. 2 (b).Wherein, material gas enters reactor from air inlet, at catalyst
There is heterogeneous catalytic reaction in surface, product tail gas flows out from gas outlet.Further, this is waved
The property sent out organic compound eliminates detection device and also includes for heating fixed-bed micro-reactor 10
Heater 11, lives with the absorption reaction or catalyst clean improving VOC
Change, thus improve work efficiency.In this embodiment, heater 11 uses heating by electric cooker,
Reaction temperature is controlled by thermocouple and temperature controller (not shown).
In this embodiment, in order to carry out 2 kinds of pollutant (that is, inorganic molecules simultaneously
Pollutant and VOC) elimination reaction or catalyst clean activation experiment, have
Effect ground is saved space and reduces cost, improves work efficiency, the quantity of fixed-bed micro-reactor
Being two, the gas outlet of each fixed-bed micro-reactor all connects with gas chromatograph 13.Need
To illustrate that, although the VOC illustrated in this embodiment eliminates detection dress
Put and include two fixed-bed micro-reactors: the first fixed-bed micro-reactor 10 and the second fixed bed
Microreactor 10 ', it will be appreciated by those skilled in the art that this VOC disappears
Except detection device may also comprise one or more fixed-bed micro-reactor.
A plurality of gas piping, is selected with the air inlet of fixed-bed micro-reactor respectively by six-way valve
Property connection.Specifically, a plurality of gas piping is fixed with first respectively by the first six-way valve 16
Bed microreactor 10 selectivity connection, and above-mentioned a plurality of gas piping is also by the second six-way valve
16 ' connect with the air inlet selectivity of the second fixed-bed micro-reactor 10 ' respectively.Wherein
One six-way valve 16 has the first to the 6th valve port 16A, 16B, 16C, 16D, 16E, 16F；
Second six-way valve 16 ' also has the first to the 6th valve port 16 ' A, 16 ' B, 16 ' C, 16
' D, 16 ' E, 16 ' F.These gas pipings mainly include inorganic molecules contaminant gases
(such as carbon monoxide) pipeline 1, a plurality of pretreatment gas pipeline, foreign gas pipeline 4,
VOC supply line.A plurality of pretreatment gas pipeline include oxygen pipeline 2,
Hydrogen pipeline 3 and diluent gas pipeline 51, for being passed through oxygen to fixed-bed micro-reactor respectively
Gas, hydrogen and diluent gas (usually noble gas), so that catalyst is carried out activation processing,
Additionally, when the concentration of pending VOC is higher, diluent gas is additionally operable to
Dilute the concentration of this VOC.In this embodiment, foreign gas pipeline 4
For carbon dioxide pipeline 4, it is used for inputting carbon dioxide, to simulate sky to fixed-bed micro-reactor
The carbon dioxide contained in the gas impact on catalyst.Inorganic molecules contaminant gases pipeline
1, oxygen pipeline 2, hydrogen pipeline 3 and carbon dioxide pipeline 4 and diluent gas pipeline
51 are sequentially connected in series along airflow direction respectively and are provided with filter 6, mass flowmenter 7 and check valve
8, wherein filter 6 is for purifying the gas in corresponding gas piping, and check valve 8 is used for controlling
Whether make in corresponding gas piping the circulation of gas, prevent gas backstreaming impact mass effusion meter
7, and mass flowmenter 7 is for accurately controlling the flow of gas in corresponding gas piping.
Additionally, be additionally provided with valve respectively at the upstream end of filter 6 and the port of export of check valve 8
A and valve B, wherein valve A is used for quality of protection effusion meter 7, and is easy to corresponding gas tube
The leak detection operation on road；Valve B is easy to distribution operation.
Additionally, oxygen pipeline 2 and hydrogen pipeline 3 by cross valve 14 respectively with the first six-way valve
16 and/or second six-way valve 16 ' the first valve port 16A, 16 ' A selectivitys connection, and then
Can be with the first fixed-bed micro-reactor 10 and/or air inlet of the second fixed-bed micro-reactor 10 '
Mouth selectivity connection.Specifically, this cross valve 14 include the first valve port to the 4th valve port 14A,
14B, 14C, 14D, the first valve port 14A connects with oxygen pipeline 2, the second valve port 14B with
First valve port 16 ' A connection of the second six-way valve 16 ', the 3rd valve port 14C and hydrogen pipeline 3
First valve port 16A connection of connection, the 4th valve port 14D and the first six-way valve 16 so that when
Need when the first fixed-bed micro-reactor 10 is passed through oxygen, only need to be by the first of cross valve 14
Valve port 14A and the 4th valve port 14D connection and by the first valve port 16A of the first six-way valve 16 with
Second valve port 16B connects.When needs are passed through oxygen to the second fixed-bed micro-reactor 10 '
During gas, only need to be by the first valve port 14A and the second valve port 14B connection of cross valve 14 and by the
First valve port 16 ' A of two six-way valves 16 ' connects with its second valve port 16 ' B.When
Need when the first fixed-bed micro-reactor 10 is passed through hydrogen, only need to be by the 3rd of cross valve 14 the
Valve port 14C and the 4th valve port 14D connection and by the first valve port 16A of the first six-way valve 16 with
Second valve port 16B connects.When needs are passed through hydrogen to the second fixed-bed micro-reactor 10 '
During gas, only the 3rd valve port 14C of cross valve 14 need to be connected with its second valve port 14B and incite somebody to action
First valve port 16 ' A of the second six-way valve 16 ' connects with its second valve port 16 ' B.
Carbon dioxide pipeline 4 and diluent gas pipeline 51 by the first three-way valve 15 respectively with the
One six-way valve 16 and/or the first valve port 16A of the second six-way valve 16 ', 16 ' A selectivitys are even
Logical, and then can be with the first fixed-bed micro-reactor 10 and/or the second fixed-bed micro-reactor 10
' air inlet selectivity connection.Specifically, this first three-way valve 15 includes the first valve port extremely
3rd valve port 15A, 15B, 15C, the first valve port 15A can with carbon dioxide pipeline 4 and/or
Diluent gas pipeline 51 selectivity connects, the of the second valve port 15B and the second six-way valve 16 '
One valve port 16 ' A connection, the 3rd valve port 15C and the first valve port 16A of the first six-way valve 16
Connection.When needs are passed through carbon dioxide to the first fixed-bed micro-reactor 10, only need to be by the
First valve port 15A of one three-way valve 15 and the 3rd valve port 15C connects and by the first six-way valve 16
The first valve port 16A and the second valve port 16B connection, be then turned on carbon dioxide pipeline 4.
When needs are passed through carbon dioxide to the second fixed-bed micro-reactor 10 ', only need to be by the one or three
The first valve port 15A and the second valve port 15B of logical valve 15 connect and by the second six-way valve 16 '
First valve port 16 ' A and the second valve port 16 ' B connection, is then turned on carbon dioxide pipeline 4
?.When needs are passed through diluent gas to the first fixed-bed micro-reactor 10, only need to be by the
First valve port 15A of one three-way valve 15 and the 3rd valve port 15C connects and by the first six-way valve 16
The first valve port 16A and the second valve port 16B connection, be then turned on diluent gas pipeline 51 i.e.
Can.When needs are passed through diluent gas to the second fixed-bed micro-reactor 10 ', only need to be by the
The first valve port 15A and the second valve port 15B of one three-way valve 15 connects and by the second six-way valve 16
' the first valve port 16 ' A and the second valve port 16 ' B connection, be then turned on diluent gas pipeline
51.Additionally, can be the most micro-instead to the first fixed-bed micro-reactor 10 or the second fixed bed
Answer device 10 ' to be passed through carbon dioxide and diluent gas, such as, need to the second micro-reaction of fixed bed
When device 10 ' is passed through carbon dioxide and diluent gas, now only need to be by the of the first three-way valve 15
One valve port 15A and the second valve port 15B connects and by the first valve port 16 of the second six-way valve 16 '
' A and the second valve port 16 ' B connection, is then turned on diluent gas pipeline 51 and carbon dioxide
Both pipelines 4.
Gas-carrier pipeline 52 is by the second three-way valve 15 ' and VOC supply line
Connection, and VOC supply line and the first valve port of the second six-way valve 16 '
16 ' A connections.Wherein, this second three-way valve 15 ' includes that the first valve port is to the 3rd valve port 15
' A, 15 ' B, 15 ' C, the first valve port 15 ' A connects with gas-carrier pipeline 52, the second valve port
15 ' B connect with VOC supply line, the 3rd valve port 15 ' C and the one or three
3rd valve port 15C connection of logical valve 15.This VOC eliminates detection device also
It is included on VOC supply line the valve being sequentially connected in series along air current flow direction
Door C, for producing generator 12 and the valve D of VOC.Wherein, valve
Door C and valve D is mainly used in preventing VOC to be diffused into other pipeline, corrosion
Instrument.Also include for heating generation additionally, this VOC eliminates detection device
The heater of device 12.As the 3rd valve port 15 ' C and the 3rd valve port 15C of the first three-way valve 15
During connection, by the 3rd valve port 15 ' C and the second valve port 15 ' B of the second three-way valve 15 ' even
Logical, now unlatching carbon dioxide pipeline 4 to be passed through generator 12 by carbon dioxide, with simulation
The impact of the carbon dioxide contained in air.Specifically, in this embodiment, generator 12
Be mainly used in liquid volatile organic compound (as shown in Figure 3), its have housing 17 and
Inserting the anemostat 20 in housing 17, the lower end of anemostat 20 is stretched under liquid level, and expands
The lower end dissipating pipe 20 is provided with multiple micropore, and the upper end of anemostat 20 then forms generator 12
Air inlet 18.Additionally, this generator 12 also includes discharging for VOC
Gas outlet 19.Wherein, the air inlet 18 of generator 12 by the second three-way valve 15 ' with
Gas-carrier pipeline 52 connects, the gas outlet 19 of generator 12 then with the of the second six-way valve 16 '
One valve port 16 ' A connection so that carrier gas enters into receiving in generator 12 from anemostat 20
Discharge below the liquid level of VOC and from micropore, and carry from liquid phase by certain
The VOC that diffusion rate is diffused in gas phase is discharged through gas outlet 19.
In another embodiment of the invention, generator 12 is for solid volatile organic compound
Thing, as shown in Figure 4.For the generator of solid VOC, its with for liquid
Unlike the generator 12 of body VOC, the lower end of generator anemostat 20 is
Uncovered, and it is not provided with multiple micropore, additionally, the lower end of anemostat 20 is positioned at generator
The top of the solid phase VOC upper surfaces held in 12 and not volatilizing with solid phase
Property organic compound contact.Carrier gas enters into, from anemostat 20, the solid phase accommodated in generator 12
Above VOC, and carry and be diffused into gas phase from solid phase by certain diffusion rate
In VOC discharge through gas outlet 19.
Gas chromatograph 13, is connected with the gas outlet of fixed-bed micro-reactor by six-way valve.
Wherein, when the second fixed-bed micro-reactor 10 ' middle generation catalytic reaction, volatility is organic
Compound supply line and the first valve port 16 ' A connection of the second six-way valve 16 ', the first valve
Mouth 16 ' A and the second valve port 16 ' B connection, wherein the second valve port 16 ' B fixes with second again
The air inlet connection of bed microreactor 10 ', the 5th valve port 16 ' E and the 6th valve port 16 ' F
Connection, wherein the 5th valve port 16 ' B again with the gas outlet of the second fixed-bed micro-reactor 10 '
Connection, and the 6th valve port 16 ' F connects with gas chromatograph 13.Similarly, when first
When there is catalytic reaction in fixed-bed micro-reactor 10, inorganic molecules contaminant gases pipeline
1 and connection and the VOC supply of gas chromatograph 13 and the first six-way valve 16
Pipeline is similar with the connection of the second six-way valve 16 ' with gas chromatograph 13.
Described a plurality of gas piping also includes inert gas purge pipeline 9, wherein inert blowing gas
Sweep pipeline 9 and include the first inert gas purge pipeline 91 for purging the first six-way valve 16
With the second inert gas purge pipeline 92 for purging the second six-way valve 16 '.Lazy first
Depend on along airflow direction respectively on property gas scavenging pipeline 91 and the second inert gas purge pipeline 92
The secondary valve being arranged in series for controlling gas circulation and volume flowmeter.When the first fixed bed
Microreactor 10 occurs before catalytic reaction or after catalyst clean activation, make first lazy
Property gas scavenging pipeline 91 connects with the 3rd valve port 16C of the first six-way valve 16, the 3rd valve port
16C and the 4th valve port 16D connects, and the 4th valve port 16D is directly communicated to air.When second
Before fixed-bed micro-reactor 10 ' middle generation catalytic reaction or after catalyst clean activation,
Make the 3rd valve port 16 ' C of the second inert gas purge pipeline 92 and the second six-way valve 16 ' even
Logical, the 3rd valve port 16 ' C and the 4th valve port 16 ' D connection, and the 4th valve port 16 ' D
It is directly communicated to air.
Preferably, diluent gas pipeline 51, gas-carrier pipeline 52 can use and inert gas purge
The noble gas that pipeline 9 is identical, such as argon, i.e. diluent gas pipeline 51, gas-carrier pipeline
52 can use identical source of the gas with inert gas purge pipeline 9, in order to make this volatility organic
Compound eliminates the structure of detection device and more simplifies.
Present invention also offers one utilizes above-mentioned VOC to eliminate detection device
Detecting the method that VOC eliminates, it comprises the following steps:
S1: choose pretreatment gas and open corresponding pretreatment gas pipeline, by pretreatment gas
Body is passed through fixed-bed micro-reactor, so that catalyst is carried out activation processing；
S2: open carrier gas gas circuit and oxygen gas circuit, and make carrier gas carry VOC
G&O is directly entered gas chromatograph, gas chromatograph measure volatile organic compound
The original concentration of thing gas；
S3: the carrier gas and oxygen that carry VOC gas are passed through fixed bed
Microreactor carries out catalytic treatment；
S4: measure VOC gas after catalytic treatment by gas chromatograph
Concentration；
S5: by the original concentration of VOC gas and the concentration after catalysis,
Calculate the eradicating efficacy of VOC.
The workflow of the present invention is sketched below by citing.
(1) first, need to select pretreatment gas for different catalysts and experiment, locate in advance
Process gases is also called activated gas, such as oxygen, hydrogen etc..Such as when choosing hydrogen, will be with
3rd valve port 14C and the second valve port 14B connection of the cross valve 14 of hydrogen pipeline 3 connection,
And the first valve port 16 ' A and the second valve port 16 ' B of the second six-way valve 16 ' are connected, the
Five valve port 16 ' E and the 6th valve port 16 ' F connection, so that hydrogen is through cross valve 14 and second
Six-way valve 16 ' enters the second fixed-bed micro-reactor 10 ', so that pretreatment gas (hydrogen)
Catalyst is carried out activation processing, so that catalyst is changed into most beneficial for testing what reaction was carried out
Certain valence state species.
(2) then, by the first inert gas purge pipeline 91 and the of the first six-way valve 16
Three valve port 16C connection and/or the second inert gas purge pipeline 92 and the second six-way valves 16 '
The 3rd valve port 16 ' C connection, the 3rd valve port 16C, 16 ' C respectively with corresponding 4th valve
Mouth 16D, 16 ' D connections, and the 4th valve port 16D, 16 ' D are directly communicated to air, with reality
Execute the first six-way valve 16 and/or purging of the second six-way valve 16 '.
(3) secondly, by the first valve port 15A and the second valve port 15B of the first communicating valve 15
Connection, and open diluent gas pipeline 51；By the first valve port 14A and second of cross valve 14
Valve port 14B connects, and opens oxygen pipeline 2；And by the first valve of the second three-way valve 15 '
Mouth 15 ' A and the second valve port 15 ' B connection, opens valve C and valve D, the second six-way valve
First valve port 16 ' A and the 6th valve port 16 ' F connection of 16 ', and open gas-carrier pipeline 52,
It is diffused into by certain diffusion rate from solid-liquid in generator 12 so that carrier gas carries
Gas phase color is entered after VOC gas in gas phase and diluent gas, oxygen mix
Spectrometer 13, obtains the original concentration of VOC gas by gas chromatograph 13.
(4) last, by the first valve port 16 ' A and second valve port 16 of the second six-way valve 16 '
' B connects and makes the 5th valve port 16 ' E and the 6th valve port 16 ' F of the second six-way valve 16 '
Connection, so that carrying the carrier gas of VOC gas, diluent gas and oxygen
It is passed through the second fixed-bed micro-reactor 10 ', thus carries out being catalyzed oxygen under the effect of catalyst
Changing reaction, the gas after catalytic oxidation enters gas chromatograph 13, passes through gas phase
Chromatograph 13 draws VOC gas concentration after catalysis.Pass through volatility
Dense after catalysis of the original concentration of organic compound gas and VOC gas
Degree, can calculate the conversion ratio of catalyst.
Additionally, during VOC elimination detection device carries out aforesaid operations,
First fixed-bed micro-reactor 10 also can be operated simultaneously.First, for different catalysts
And experiment needs to select activated gas, such as oxygen, hydrogen etc..Such as the second fixed-bed micro-reactor
10 ' select hydrogen, now, can only select other gases in addition to the hydrogen.Such as choose oxygen,
Open oxygen pipeline 2, and oxygen pipeline 2 is connected (i.e. with the first fixed-bed micro-reactor 10
The first valve port 14A and the 4th valve port 14D of the first cross valve 14 are connected), make oxygen enter
First fixed-bed micro-reactor 10 carries out activation processing to catalyst, to be changed into by catalyst
Certain valence state species carried out most beneficial for experiment reaction.Then by inorganic molecules contaminant gases
Pipeline 1 connects with the first valve port 16A of the first six-way valve 16, and by the first valve port 16A with
6th valve port 16F connection, so that inorganic molecules contaminant gases is directly entered gas chromatogram
Instrument 13, draws the original concentration of inorganic molecules contaminant gases by gas chromatograph 13.
Then inorganic molecules contaminant gases is passed through the first fixed-bed micro-reactor 10 be catalyzed
Reaction (the first valve port 16A and the second valve port 16B of the first six-way valve 16 will connect and make
First six-way valve 16 the 5th valve port 16E and the 6th valve port 16F connection), through catalytic reaction it
After gas enter gas chromatograph 13, draw inorganic pollution gas by gas chromatograph 13
Body concentration after catalysis.Original concentration and nothing finally by inorganic molecules contaminant gases
Machine small molecule contaminants gas concentration after catalysis, can calculate the conversion ratio of catalyst,
To detect the activity of catalyst.
Although it should be noted that foreign gas pipeline in this embodiment is carbon dioxide pipe
Road 4, to investigate the carbon dioxide contained in the air impact on catalyst, this area skill
Art personnel should be appreciated that this foreign gas pipeline can also be other foreign gas pipeline, example
Such as steam pipeline, in order to the simulation steam impact on catalyst, further, steam at water
Water vapor generation device can be increased on air pipe.
This VOC eliminates detection device and detection method thereof by arranging a plurality of gas
Body pipeline, with the feature for different VOC gas, can use difference
Reactor eliminate VOC gas and use different gas pipings also
Raw catalyst activity.Can also be switched by control valve and control neatly to connect different gas
Body pipeline, applies, to carry out height while realizing 2 or more fixed-bed micro-reactor
Concentration or the absorption of multiple types volatile contaminant and cleaning activate, thus are effectively saved sky
Between and reduce cost, improve work efficiency and accuracy.
Claims (9)
1. a VOC eliminates detection device, it is characterised in that including:
At least one fixed-bed micro-reactor, has air inlet and gas outlet；A plurality of gas piping,
Connected with the air inlet selectivity of fixed-bed micro-reactor respectively by six-way valve；Wherein, described
A plurality of gas piping includes inorganic molecules contaminant gases pipeline, a plurality of pretreatment gas pipe
Road, carbon dioxide pipeline, gas-carrier pipeline and VOC supply line, described
A plurality of pretreatment gas pipeline includes oxygen pipeline, hydrogen pipeline and diluent gas pipeline, wherein,
Oxygen pipeline is connected with described six-way valve selectivity by cross valve respectively with hydrogen pipeline, and this is waved
The property sent out organic compound eliminates detection device and also includes the first three-way valve and the second three-way valve, and first
Three-way valve and the second three-way valve are respectively provided with the first valve port to the 3rd valve port, the of the first three-way valve
One valve port and carbon dioxide pipeline and diluent gas pipeline connection, the second valve port of the first three-way valve
Connect with described six-way valve respectively with the 3rd valve port, the first valve port of the second three-way valve and carrier gas pipe
Road connects, and the second valve port of the second three-way valve connects with VOC supply line,
And VOC supply line connects with described six-way valve again, the of the first three-way valve
Three valve ports also connect with the 3rd valve port of the second three-way valve；And gas chromatograph, by described
Six-way valve connects with the gas outlet of fixed-bed micro-reactor.
VOC the most according to claim 1 eliminates detection device, its feature
It is, each in inorganic molecules contaminant gases pipeline, a plurality of pretreatment gas pipeline
Pretreatment gas pipeline, carbon dioxide pipeline, gas-carrier pipeline are sequentially connected in series along airflow direction respectively
It is provided with filter, mass flowmenter and check valve.
VOC the most according to claim 2 eliminates detection device, its feature
It is, is additionally included on VOC supply line for producing volatile organic
The generator of compound and the heater for heating generator, the air inlet of generator and carrier gas pipe
Road connects, and the gas outlet of generator then connects with VOC supply line.
VOC the most according to claim 3 eliminates detection device, its feature
Being, generator accommodates liquid volatile organic compound, and generator has anemostat, expands
The lower end dissipating pipe is stretched under liquid level, and the upper end of anemostat then forms the air inlet of generator.
VOC the most according to claim 3 eliminates detection device, its feature
Being, generator accommodates solid VOC, and generator has anemostat, expands
The lower end dissipating pipe extends on solid VOC, and the upper end of anemostat is then formed and sends out
The air inlet of raw device.
VOC the most according to claim 1 eliminates detection device, and its feature exists
In, also include the heater for heating fixed-bed micro-reactor.
VOC the most according to claim 2 eliminates detection device, and its feature exists
In, at least one fixed-bed micro-reactor described is two fixed-bed micro-reactors, each fixing
The gas outlet of bed microreactor all connects with gas chromatograph.
VOC the most according to claim 1 eliminates detection device, and its feature exists
In, described six-way valve has the first to the 6th valve port, when being catalyzed in fixed-bed micro-reactor
During reaction, VOC supply line connects with the first valve port of described six-way valve,
First valve port and the connection of the second valve port, wherein the second valve port again with the air inlet of fixed-bed micro-reactor
Mouth connection, the 5th valve port and the connection of the 6th valve port, wherein the 5th valve port reaction micro-with fixed bed again
The gas outlet connection of device, and the 6th valve port connects with gas chromatograph.
VOC the most according to claim 1 eliminates detection device, and its feature exists
In, described a plurality of gas piping also includes inert gas purge pipeline, works as fixed-bed micro-reactor
Before middle generation catalytic reaction or catalyst clean activation after, make inert gas purge pipeline with
3rd valve port connection of six-way valve, the 3rd valve port and the connection of the 4th valve port, and the 4th valve port is straight
Connect to air.
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| CN201510044204.XA CN104785097B (en) | 2015-01-28 | 2015-01-28 | VOC eliminates detection device and detection method thereof |
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| CN104965021B (en) * | 2015-07-24 | 2018-05-04 | 中国科学院重庆绿色智能技术研究院 | A kind of coal-fired flue gas denitration catalyst performance evaluation device and method |
| CN107607673A (en) * | 2017-08-30 | 2018-01-19 | 郑州轻工业学院 | The experimental provision of volatile environmental pollutants adsorption efficiency in a kind of evaluation gas phase |
| CN109061034A (en) * | 2018-07-12 | 2018-12-21 | 天津大学 | A kind of evaluating apparatus and evaluation method for hydrolyst performance |
| CN108828104A (en) * | 2018-08-28 | 2018-11-16 | 天津大学 | It is a kind of for measuring the experimental provision of volatile organic matter the catalysis oxidation efficiency |
| CN114502954A (en) * | 2019-09-06 | 2022-05-13 | 暨南大学 | Gas concentration quantification system and method based on catalytic conversion |
| CN112370966B (en) * | 2020-10-30 | 2022-04-22 | 南京大学 | Intermittent photoreactor for VOCs heterogeneous reaction and application thereof |
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| CN1724117B (en) * | 2004-06-29 | 2012-10-03 | 三菱电机株式会社 | Volatile organic compound treatment apparatus |
| JP2008302347A (en) * | 2007-06-11 | 2008-12-18 | Ooden:Kk | Exhaust gas treating device/method |
| US9574122B2 (en) * | 2009-04-14 | 2017-02-21 | Uniboard Canada Inc. | Process for reducing the content of water soluble volatile organic compounds in a gas |
| CN204051372U (en) * | 2014-07-07 | 2014-12-31 | 滕州京鲁伟业科学仪器有限公司 | The uninterrupted gas cleaning plant of a kind of air-flow |
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