CN204502795U - VOC eliminates checkout gear - Google Patents

VOC eliminates checkout gear Download PDF

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Publication number
CN204502795U
CN204502795U CN201520061697.3U CN201520061697U CN204502795U CN 204502795 U CN204502795 U CN 204502795U CN 201520061697 U CN201520061697 U CN 201520061697U CN 204502795 U CN204502795 U CN 204502795U
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China
Prior art keywords
gas
communicated
valve port
voc
pipeline
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Expired - Fee Related
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CN201520061697.3U
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Chinese (zh)
Inventor
张晓东
顾竹珺
董寒
赵迪
黄怡佳
林欣喻
李冰莲
赵大铭
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

VOC eliminates checkout gear, comprising: at least one fixed-bed micro-reactor, has air inlet and gas outlet; Many gas pipings, are communicated with the air inlet of fixed-bed micro-reactor is selective respectively by six-way valve; And gas chromatograph, be communicated with the gas outlet of fixed-bed micro-reactor by described six-way valve.This VOC is eliminated checkout gear and is achieved catalyst activation and VOC transforms in one, and repacking is convenient, effectively raising efficiency, saving space, reduce costs.

Description

VOC eliminates checkout gear
Technical field
The utility model relates to a kind of VOC and eliminates checkout gear.
Background technology
VOC (Volatile Organic Compounds), be called for short VOCs, referring generally to that saturated vapour pressure is lower, hold volatile hydrocarbon and their derivative under normal temperature, is the another main source of atmospheric pollution after NOx, SOx, small particle.The main source of degradation of indoor air VOCs: is: construction material and ornament materials, the commodity relevant with mankind's activity and people's metabolite.VOCs is harmful for major part.After being absorbed by respiratory system or skin, VOCs can cause damage to organs such as the hemopoietic system of people, nervous system, respiratory system and liver, kidney and eyes.After Human body package reaches certain hour in containing the environment of high concentration VOCs, the VOCs of Heavy metal can destroy the central nervous system of people, and neu accumulates, and directly causes human body to be anaesthetized, poisoning even dead.But usually, because the VOCs concentration in environment is lower, it mostly is chronic lesion to the harm that human body causes, as degradation under headache, nauseating, dizzy, red swelling of the skin, respiratory inflammation, nerve dysfunction, infant immunisation ability.Many VOCs oneself be identified or suspect for carcinogen.Therefore, how efficiently eliminating VOCs and improving indoor environmental quality becomes the emphasis that people pay close attention to, develop high efficiency scavenging material and technology imperative.
The purification treatment technology of organic exhaust gas can be divided into two classes substantially: recovery method and disruptive method.Recovery method refers to the physicochemical property utilizing VOCs self, and by it, from exhaust gas source, separation and recovery is to re-use, and 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 conversions be the environmental sound such as carbon dioxide, water or endanger relatively low material, main method has direct oxidation burning, catalytic combustion, biological treatment, photocatalysis Decomposition, low-temperature plasma etc.Wherein Production by Catalytic Combustion Process has features such as destroying thoroughly, non-secondary pollution, flow process are relatively simple, is a kind of desirable organic waste-gas purification means.The catalytic combustion applied in environmental project refers to that flammable VOCs is in the reaction of catalyst surface generation Heterogeneous oxidation, generates CO 2, H 2the process of O etc.When exhaust gas concentration is lower, way general is at present combined at Production by Catalytic Combustion Process and absorption method, first improved the concentration of VOCs in waste gas by Adsorption Concentration, reach after the minimum calorific value of gas maintained needed for combustion system requires, enter catalytic combustion reactor purified treatment.
Current existing VOC eliminates checkout gear can not carry out catalyst activation and VOCs conversion usually simultaneously, and gas piping is relative with fixed-bed micro-reactor fixing, can not switch flexibly.
Utility model content
The purpose of this utility model is to provide a kind of VOC and eliminates checkout gear, and can not only carry out catalyst activation and VOCs conversion, and repacking is convenient, gas piping and fixed-bed micro-reactor can switch flexibly simultaneously.
In order to solve the problem, the utility model provides a kind of VOC and eliminates checkout gear, and it comprises: at least one fixed-bed micro-reactor, has air inlet and gas outlet; Many gas pipings, are communicated with the air inlet of fixed-bed micro-reactor is selective respectively by six-way valve; And gas chromatograph, be communicated with the gas outlet of fixed-bed micro-reactor by described six-way valve.
Wherein, the VOC supply line that described many gas pipings comprise inorganic molecules contaminant gases pipeline, many pretreatment gas pipelines, carbon dioxide pipeline, gas-carrier pipeline and are communicated with gas-carrier pipeline, each the pretreatment gas pipeline wherein in inorganic pollution gas piping, many pretreatment gas pipelines, carbon dioxide pipeline, gas-carrier pipeline have been arranged in series filter, mass flowmenter and check valve successively along airflow direction respectively.
Wherein, also be included on VOC supply line for generation of the generator of VOC and the heater for heating generator, the air inlet of generator is communicated with gas-carrier pipeline, and the gas outlet of generator is then communicated with VOC supply line.
Wherein, generator accommodates liquid volatile organic compound, and generator has anemostat, and 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, and the lower end of anemostat extends on solid VOC, and the upper end of anemostat then forms the air inlet of generator.
Wherein, the heater for heating fixed-bed micro-reactor is also comprised.
Wherein, described many pretreatment gas pipelines comprise oxygen pipeline, hydrogen pipeline and diluent gas pipeline.
Wherein, at least one fixed-bed micro-reactor described is two fixed-bed micro-reactors, and the gas outlet of each fixed-bed micro-reactor is all communicated with gas chromatograph.
Wherein, described six-way valve has the first to the 6th valve port, when there is catalytic reaction in fixed-bed micro-reactor, VOC supply line is communicated with the first valve port, first valve port is communicated with the second valve port, and wherein the second valve port is communicated with the air inlet of fixed-bed micro-reactor again, and the 5th valve port is communicated with the 6th valve port, wherein the 5th valve port is communicated with the gas outlet of fixed-bed micro-reactor again, and the 6th valve port is communicated with gas chromatograph.
Wherein, described many gas pipings also comprise inert gas purge pipeline, before there is catalytic reaction in fixed-bed micro-reactor or after catalyst clean activation, inert gas purge pipeline is communicated with the 3rd valve port of six-way valve, 3rd valve port is communicated with the 4th valve port, and the 4th valve port directly leads to air.
Checkout gear is eliminated according to VOC of the present utility model, by configuring many gas pipings, make this checkout gear can according to the VOCs gas that will transform, controlled neatly by control valve switch to be communicated with gas with various pipeline, when VOC concentration is high or multiple VOC exists, can transformation efficiency be improved, effectively save space and reduce costs, improving conventional efficient and accuracy.In addition, this apparatus structure is simple, flexible and changeable.Further, this device comprises 2 fixed-bed micro-reactors, the catalyzed conversion experiment of 2 kinds of pollutants (that is: inorganic molecules pollutant and VOC) can be carried out simultaneously, effectively save space further and reduce costs, improving conventional efficient and accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation eliminating checkout gear according to VOC of the present utility model;
Fig. 2 (a), Fig. 2 (b) are the structural representations of the fixed-bed micro-reactor in Fig. 1;
Fig. 3 (a) is the structural representation of the generator for liquid volatile organic compound;
Fig. 3 (b) is the structural representation of the generator anemostat for liquid volatile organic compound;
Fig. 4 is the structural representation of the generator for solid VOC.
Detailed description of the invention
Describe VOC of the present utility model in detail below in conjunction with accompanying drawing and eliminate checkout gear.It will be appreciated by those skilled in the art that detailed description of the invention described below is just for explaining the utility model, not for making any restriction to it.
Fig. 1 is the specific embodiment eliminating checkout gear according to VOC of the present utility model.As shown in Figure 1, this VOC elimination checkout gear comprises fixed-bed micro-reactor, many gas pipings and gas chromatograph 13.
Wherein, fixed-bed micro-reactor, also known as packed bed reactor, is filled with solid catalyst or solid reactant to realize a kind of reactor of heterogeneous reaction process.It is roughly the shape of U-shaped pipe, and has air inlet and gas outlet respectively at the two ends of U-shaped pipe, is provided with the catalyst placement section 21 for placing catalyst and silica wool etc., in air inlet side as shown in Fig. 2 (a) close to the position of bottom.Preferably, the caliber for the catalyst placement section 21 placing catalyst is greater than the caliber of U-shaped pipe other parts, so that place more catalyst and silica wool, as shown in Fig. 2 (b).Wherein, material gas enters reactor from air inlet, and at catalyst surface generation heterogeneous catalytic reaction, product tail gas flows out from gas outlet.Further, this VOC elimination checkout gear also comprises the heater 11 for heating fixed-bed micro-reactor 10, to improve absorption reaction or the catalyst clean activation of VOC, thus increases work efficiency.In this embodiment, heater 11 adopts heating by electric cooker, controls reaction temperature by thermocouple and temperature controller (not shown).
In this embodiment, in order to carry out 2 kinds of pollutants (namely simultaneously, inorganic molecules pollutant and VOC) eliminative reaction or catalyst clean activation experiment, effectively save space and reduce costs, increase work efficiency, the quantity of fixed-bed micro-reactor is two, and the gas outlet of each fixed-bed micro-reactor is all communicated with gas chromatograph 13.It should be noted that, although the VOC illustrated in this embodiment eliminates checkout gear comprise two fixed-bed micro-reactors: the first fixed-bed micro-reactor 10 and the second fixed-bed micro-reactor 10 ', it will be appreciated by those skilled in the art that this VOC elimination checkout gear also can comprise one or more fixed-bed micro-reactor.
Many gas pipings, are communicated with the air inlet of fixed-bed micro-reactor is selective respectively by six-way valve.Particularly, many gas pipings are communicated with the first fixed-bed micro-reactor 10 is selective respectively by the first six-way valve 16, and above-mentioned many gas pipings are also communicated with the air inlet of the second fixed-bed micro-reactor 10 ' is selective respectively by the second six-way valve 16 '.Wherein the first 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 comprise inorganic molecules contaminant gases (such as carbon monoxide) pipeline 1, many pretreatment gas pipelines, foreign gas pipeline 4, VOC supply lines.Many pretreatment gas pipeline comprises oxygen pipeline 2, hydrogen pipeline 3 and diluent gas pipeline 51, for passing into oxygen, hydrogen and diluent gas (being generally inert gas) respectively to fixed-bed micro-reactor, to carry out activation process to catalyst, in addition, when the concentration of pending VOC is higher, diluent gas is also for diluting the concentration of this VOC.In this embodiment, foreign gas pipeline 4 is carbon dioxide pipeline 4, for fixed-bed micro-reactor input carbon dioxide, with the impact of the carbon dioxide contained in simulated air on catalyst.Inorganic molecules contaminant gases pipeline 1, oxygen pipeline 2, hydrogen pipeline 3 and carbon dioxide pipeline 4 and diluent gas pipeline 51 have been arranged in series filter 6, mass flowmenter 7 and check valve 8 successively along airflow direction respectively, its middle filtrator 6 is for purifying the gas in corresponding gas piping, whether check valve 8 for controlling the circulation of gas in corresponding gas piping, prevent gas backstreaming impact mass flowmeter 7, and mass flowmenter 7 is for accurately controlling the flow of gas in corresponding gas piping.In addition, be also provided with valve A and valve B respectively at the upstream end of filter 6 and the port of export of check valve 8, wherein valve A is for the protection of mass flowmenter 7, and is convenient to the leak detection operation of corresponding gas piping; Valve B is convenient to distribution operation.
In addition, oxygen pipeline 2 and hydrogen pipeline 3 by cross valve 14 respectively with the first valve port 16A of the first six-way valve 16 and/or the second six-way valve 16 ', 16 ' A is selective is communicated with, and then can be communicated with the air inlet of the first fixed-bed micro-reactor 10 and/or the second fixed-bed micro-reactor 10 ' is selective.Particularly, this cross valve 14 comprises the first valve port to the 4th valve port 14A, 14B, 14C, 14D, first valve port 14A is communicated with oxygen pipeline 2, second valve port 14B is communicated with the first valve port 16 ' A of the second six-way valve 16 ', 3rd valve port 14C is communicated with hydrogen pipeline 3,4th valve port 14D is communicated with the first valve port 16A of the first six-way valve 16, make when needs pass into oxygen to the first fixed-bed micro-reactor 10, only the first valve port 14A of cross valve 14 need be communicated with the 4th valve port 14D and the first valve port 16A of the first six-way valve 16 is communicated with the second valve port 16B.When needs pass into oxygen to the second fixed-bed micro-reactor 10 ', only the first valve port 14A of cross valve 14 need be communicated with the second valve port 14B and the first valve port 16 ' A of the second six-way valve 16 ' is communicated with its second valve port 16 ' B.When needs pass into hydrogen to the first fixed-bed micro-reactor 10, only the 3rd valve port 14C of cross valve 14 need be communicated with the 4th valve port 14D and the first valve port 16A of the first six-way valve 16 is communicated with the second valve port 16B.When needs pass into hydrogen to the second fixed-bed micro-reactor 10 ', only the 3rd valve port 14C of cross valve 14 need be communicated with its second valve port 14B and the first valve port 16 ' A of the second six-way valve 16 ' is communicated with its second valve port 16 ' B.
Carbon dioxide pipeline 4 and diluent gas pipeline 51 by the first triple valve 15 respectively with the first valve port 16A of the first six-way valve 16 and/or the second six-way valve 16 ', 16 ' A is selective is communicated with, and then can be communicated with the air inlet of the first fixed-bed micro-reactor 10 and/or the second fixed-bed micro-reactor 10 ' is selective.Particularly, this first triple valve 15 comprises the first valve port to the 3rd valve port 15A, 15B, 15C, first valve port 15A can with carbon dioxide pipeline 4 and/or diluent gas pipeline 51 be selective is communicated with, second valve port 15B is communicated with the first valve port 16 ' A of the second six-way valve 16 ', and the 3rd valve port 15C is communicated with the first valve port 16A of the first six-way valve 16.When needs pass into carbon dioxide to the first fixed-bed micro-reactor 10, only the first valve port 15A of the first triple valve 15 need be communicated with the 3rd valve port 15C and the first valve port 16A of the first six-way valve 16 is communicated with the second valve port 16B, then open carbon dioxide pipeline 4.When needs pass into carbon dioxide to the second fixed-bed micro-reactor 10 ', only the first valve port 15A of the first triple valve 15 need be communicated with the second valve port 15B and the first valve port 16 ' A of the second six-way valve 16 ' is communicated with the second valve port 16 ' B, then open carbon dioxide pipeline 4.When needs pass into diluent gas to the first fixed-bed micro-reactor 10, only the first valve port 15A of the first triple valve 15 need be communicated with the 3rd valve port 15C and the first valve port 16A of the first six-way valve 16 is communicated with the second valve port 16B, then open diluent gas pipeline 51.When needs pass into diluent gas to the second fixed-bed micro-reactor 10 ', only the first valve port 15A of the first triple valve 15 need be communicated with the second valve port 15B and the first valve port 16 ' A of the second six-way valve 16 ' is communicated with the second valve port 16 ' B, then open diluent gas pipeline 51.In addition, carbon dioxide and diluent gas can be passed into the first fixed-bed micro-reactor 10 or the second fixed-bed micro-reactor 10 ' simultaneously, such as, when needing to pass into carbon dioxide and diluent gas to the second fixed-bed micro-reactor 10 ', now only the first valve port 15A of the first triple valve 15 need be communicated with the second valve port 15B and the first valve port 16 ' A of the second six-way valve 16 ' is communicated with the second valve port 16 ' B, then open both diluent gas pipeline 51 and carbon dioxide pipeline 4.
Gas-carrier pipeline 52 is communicated with VOC supply line by the second triple valve 15 ', and VOC supply line is communicated with the first valve port 16 ' A of the second six-way valve 16 '.Wherein, this second triple valve 15 ' comprises the first valve port to the 3rd valve port 15 ' A, 15 ' B, 15 ' C, first valve port 15 ' A is communicated with gas-carrier pipeline 52, second valve port 15 ' B is communicated with VOC supply line, and the 3rd valve port 15 ' C is communicated with the 3rd valve port 15C of the first triple valve 15.This VOC eliminate checkout gear be also included in VOC supply line is connected successively along air current flow direction valve C, for generation of the generator 12 of VOC and valve D.Wherein, valve C and valve D is mainly used in preventing VOC to be diffused into other pipeline, corrosion instrument.In addition, this VOC elimination checkout gear also comprises the heater for heating generator 12.When the 3rd valve port 15 ' C is communicated with the 3rd valve port 15C of the first triple valve 15,3rd valve port 15 ' C of the second triple valve 15 ' is communicated with the second valve port 15 ' B, now open carbon dioxide pipeline 4 so that carbon dioxide is passed into generator 12, with the impact of the carbon dioxide contained in simulated air.Particularly, in this embodiment, generator 12 is mainly used in liquid volatile organic compound (as Fig. 3 (a), shown in Fig. 3 (b)), its anemostat 20 that there is housing 17 and insert in housing 17, the lower end of anemostat 20 is stretched under liquid level, and the lower end of anemostat 20 is provided with multiple micropore, and the upper end of anemostat 20 then forms the air inlet 18 of generator 12.In addition, this generator 12 also comprises the gas outlet 19 of discharging for VOC.Wherein, the air inlet 18 of generator 12 is communicated with gas-carrier pipeline 52 by the second triple valve 15 ', 19, the gas outlet of generator 12 is communicated with the first valve port 16 ' A of the second six-way valve 16 ', discharge from micropore below the liquid level making carrier gas enter into the VOC held in generator 12 from anemostat 20, and carry the VOC be diffused into gas phase by certain diffusion rate from liquid phase and discharge through gas outlet 19.
In another embodiment of the present utility model, generator 12 for solid VOC, as shown in Figure 4.For the generator of solid VOC, itself and the generator 12 for liquid volatile organic compound are uncovered unlike the lower end of generator anemostat 20, and be not provided with multiple micropore, in addition, the lower end of anemostat 20 is positioned at the top of the solid phase VOC upper surface that generator 12 holds and does not contact with solid phase VOC.Carrier gas enters into from anemostat 20 above the solid phase VOC that holds in generator 12, and carries the VOC be diffused into gas phase by certain diffusion rate from solid phase and discharge through gas outlet 19.
Gas chromatograph 13, is communicated with the gas outlet of fixed-bed micro-reactor by six-way valve.Wherein, when the second middle generation catalytic reaction of fixed-bed micro-reactor 10 ', VOC supply line is communicated with the first valve port 16 ' A of the second six-way valve 16 ', first valve port 16 ' A is communicated with the second valve port 16 ' B, wherein the second valve port 16 ' B is communicated with the air inlet of the second fixed-bed micro-reactor 10 ' again, 5th valve port 16 ' E is communicated with the 6th valve port 16 ' F, wherein the 5th valve port 16 ' E is communicated with the gas outlet of the second fixed-bed micro-reactor 10 ' again, and the 6th valve port 16 ' F is communicated with gas chromatograph 13.Similarly, when there is catalytic reaction in the first fixed-bed micro-reactor 10, the connection of inorganic molecules contaminant gases pipeline 1 and gas chromatograph 13 and the first six-way valve 16 and the connection of VOC supply line and gas chromatograph 13 and the second six-way valve 16 ' similar.
Described many gas pipings also comprise inert gas purge pipeline 9, and wherein inert gas purge pipeline 9 comprises the first inert gas purge pipeline 91 for purging the first six-way valve 16 and the second inert gas purge pipeline 92 for purging the second six-way valve 16 '.On the first inert gas purge pipeline 91 and the second inert gas purge pipeline 92 respectively along airflow direction be arranged in series successively for control gas circulation valve and volume flowmeter.Before there is catalytic reaction in the first fixed-bed micro-reactor 10 or after catalyst clean activation, first inert gas purge pipeline 91 is communicated with the 3rd valve port 16C of the first six-way valve 16,3rd valve port 16C is communicated with the 4th valve port 16D, and the 4th valve port 16D directly leads to air.Before the middle generation catalytic reaction of the second fixed-bed micro-reactor 10 ' or after catalyst clean activation, second inert gas purge pipeline 92 is communicated with the 3rd valve port 16 ' C of the second six-way valve 16 ', 3rd valve port 16 ' C is communicated with the 4th valve port 16 ' D, and the 4th valve port 16 ' D directly leads to air.
Preferably, diluent gas pipeline 51, gas-carrier pipeline 52 can adopt the inert gas identical with inert gas purge pipeline 9, such as argon gas, namely diluent gas pipeline 51, gas-carrier pipeline 52 can adopt identical source of the gas with inert gas purge pipeline 9, so that the structure making this VOC eliminate checkout gear simplifies more.
Workflow of the present utility model is sketched below by citing.
(1) first, need to select pretreatment gas for different catalysts and experiment, pretreatment gas is also called activated gas, as oxygen, hydrogen etc.Such as when choosing hydrogen, 3rd valve port 14C of the cross valve 14 be communicated with hydrogen pipeline 3 is communicated with the second valve port 14B, and the first valve port 16 ' A of the second six-way valve 16 ' is communicated with the second valve port 16 ' B, 5th valve port 16 ' E is communicated with the 6th valve port 16 ' F, the second fixed-bed micro-reactor 10 ' is entered through cross valve 14 and the second six-way valve 16 ' to make hydrogen, to make pretreatment gas (hydrogen) carry out activation process to catalyst, change into make catalyst and be conducive to most testing certain valence state species reacting and carry out.
(2) then, first inert gas purge pipeline 91 to be communicated with the 3rd valve port 16C of the first six-way valve 16 and/or the second inert gas purge pipeline 92 is communicated with the 3rd valve port 16 ' C of the second six-way valve 16 ', 3rd valve port 16C, 16 ' C are communicated with corresponding the 4th valve port 16D, 16 ' D respectively, and the 4th valve port 16D, 16 ' D directly lead to air, to implement the purging to the first six-way valve 16 and/or the second six-way valve 16 '.
(3) secondly, the first valve port 15A of the first communicating valve 15 is communicated with the second valve port 15B, and opens diluent gas pipeline 51; First valve port 14A of cross valve 14 is communicated with the second valve port 14B, and opens oxygen pipeline 2; And the first valve port 15 ' A of the second triple valve 15 ' is communicated with the second valve port 15 ' B, open valve C and valve D, first valve port 16 ' A of the second six-way valve 16 ' is communicated with the 6th valve port 16 ' F, and open gas-carrier pipeline 52, carry to make carrier gas and after solid-liquid is diffused into VOC gas gas phase and diluent gas, oxygen mix by certain diffusion rate, enter gas chromatograph 13 in generator 12, obtained the original concentration of VOC gas by gas chromatograph 13.
(4) last, first valve port 16 ' A of the second six-way valve 16 ' is communicated with the second valve port 16 ' B and the 5th valve port 16 ' E of the second six-way valve 16 ' is communicated with the 6th valve port 16 ' F, the second fixed-bed micro-reactor 10 ' is passed into make to carry the carrier gas of VOC gas, diluent gas and oxygen, thus catalytic oxidation is carried out under the effect of catalyst, gas after catalytic oxidation enters gas chromatograph 13, draws the concentration of VOC gas after catalysis by gas chromatograph 13.By original concentration and the concentration of VOC gas after catalysis of VOC gas, the conversion ratio of catalyst can be calculated.
In addition, eliminate checkout gear at VOC and carry out in aforesaid operations process, the first fixed-bed micro-reactor 10 also can carry out work simultaneously.First, need to select activated gas, as oxygen, hydrogen etc. for different catalysts and experiment.As the second fixed-bed micro-reactor 10 ' selects hydrogen, now, other gases in addition to the hydrogen can only be selected.Such as choose oxygen, open oxygen pipeline 2, and oxygen pipeline 2 is communicated with the first fixed-bed micro-reactor 10 (the first valve port 14A by the first cross valve 14 is communicated with the 4th valve port 14D), make oxygen enter the first fixed-bed micro-reactor 10 pairs of catalyst and carry out activation process, be conducive to most testing certain valence state species reacting and carry out so that catalyst is changed into.Then inorganic molecules contaminant gases pipeline 1 is communicated with the first valve port 16A of the first six-way valve 16, and the first valve port 16A is communicated with the 6th valve port 16F, to make inorganic molecules contaminant gases directly enter gas chromatograph 13, drawn the original concentration of inorganic molecules contaminant gases by gas chromatograph 13.Then inorganic molecules contaminant gases is passed into the first fixed-bed micro-reactor 10 and carry out catalytic reaction (to be communicated with the second valve port 16B by the first valve port 16A of the first six-way valve 16 and the 5th valve port 16E of the first six-way valve 16 is communicated with the 6th valve port 16F), gas after catalytic reaction enters gas chromatograph 13, draws the concentration of inorganic pollution gas after catalysis by gas chromatograph 13.Finally by original concentration and the concentration of inorganic molecules contaminant gases after catalysis of inorganic molecules contaminant gases, the conversion ratio of catalyst can be calculated, to detect the activity of catalyst.
It should be noted that, although foreign gas pipeline is in this embodiment carbon dioxide pipeline 4, to investigate the carbon dioxide that contains in air to the impact of catalyst, those skilled in the art are to be understood that, this foreign gas pipeline also can be other foreign gas pipeline, and such as steam pipeline, so that Simulated Water steam is on the impact of catalyst, further, steam pipeline can increase water vapor generation device.
This VOC eliminates checkout gear by arranging many gas pipings, with the feature for different VOC gas, different reactors can be adopted to eliminate VOC gas and to adopt different gas piping reducing catalysts active.Also can be controlled neatly by control valve switch to be communicated with different gas pipings, with application while realizing 2 or more fixed-bed micro-reactors, to carry out the absorption of high concentration or multiple types volatile contaminant and clean activation, thus effectively save space and reduce costs, increase work efficiency and accuracy.

Claims (10)

1. VOC eliminates a checkout gear, it is characterized in that, comprising:
At least one fixed-bed micro-reactor, has air inlet and gas outlet;
Many gas pipings, are communicated with the air inlet of fixed-bed micro-reactor is selective respectively by six-way valve; And gas chromatograph, be communicated with the gas outlet of fixed-bed micro-reactor by described six-way valve.
2. VOC according to claim 1 eliminates checkout gear, it is characterized in that, the VOC supply line that described many gas pipings comprise inorganic molecules contaminant gases pipeline, many pretreatment gas pipelines, carbon dioxide pipeline, gas-carrier pipeline and are communicated with gas-carrier pipeline, each the pretreatment gas pipeline wherein in inorganic molecules contaminant gases pipeline, many pretreatment gas pipelines, carbon dioxide pipeline, gas-carrier pipeline have been arranged in series filter, mass flowmenter and check valve successively along airflow direction respectively.
3. VOC according to claim 2 eliminates checkout gear, it is characterized in that, also be included on VOC supply line for generation of the generator of VOC and the heater for heating generator, the air inlet of generator is communicated with gas-carrier pipeline, and the gas outlet of generator is then communicated with VOC supply line.
4. VOC according to claim 3 eliminates checkout gear, it is characterized in that, 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.
5. VOC according to claim 3 eliminates checkout gear, it is characterized in that, generator accommodates solid VOC, generator has anemostat, the lower end of anemostat extends on solid VOC, and the upper end of anemostat then forms the air inlet of generator.
6. VOC according to claim 1 eliminates checkout gear, it is characterized in that, also comprising the heater for heating fixed-bed micro-reactor.
7. VOC according to claim 2 eliminates checkout gear, and it is characterized in that, described many pretreatment gas pipelines comprise oxygen pipeline, hydrogen pipeline and diluent gas pipeline.
8. VOC according to claim 1 eliminates checkout gear, and it is characterized in that, at least one fixed-bed micro-reactor described is two fixed-bed micro-reactors, and the gas outlet of each fixed-bed micro-reactor is all communicated with gas chromatograph.
9. VOC according to claim 1 eliminates checkout gear, it is characterized in that, described six-way valve has the first to the 6th valve port, when there is catalytic reaction in fixed-bed micro-reactor, VOC supply line is communicated with the first valve port, first valve port is communicated with the second valve port, wherein the second valve port is communicated with the air inlet of fixed-bed micro-reactor again, 5th valve port is communicated with the 6th valve port, wherein the 5th valve port is communicated with the gas outlet of fixed-bed micro-reactor again, and the 6th valve port is communicated with gas chromatograph.
10. VOC according to claim 1 eliminates checkout gear, it is characterized in that, described many gas pipings also comprise inert gas purge pipeline, before there is catalytic reaction in fixed-bed micro-reactor or after catalyst clean activation, inert gas purge pipeline is communicated with the 3rd valve port of six-way valve, 3rd valve port is communicated with the 4th valve port, and the 4th valve port directly leads to air.
CN201520061697.3U 2015-01-28 2015-01-28 VOC eliminates checkout gear Expired - Fee Related CN204502795U (en)

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