CN211913275U - High-pressure membrane permeation equipment based on gas mass flow control technology - Google Patents
High-pressure membrane permeation equipment based on gas mass flow control technology Download PDFInfo
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Abstract
The utility model relates to a high-pressure membrane sees through equipment based on gas mass flow control technique is applied to distribution technical field, include: the device comprises a gas flow control device, a membrane permeation experimental device and a gas analysis device which are connected in sequence; the gas flow control device is used for outputting test gas and transmitting the test gas into the membrane permeation experiment device, and the test gas is used for a membrane permeation experiment; the membrane permeation experiment device is used for carrying out a membrane permeation experiment through the test gas; the gas analysis device is used for analyzing the gas after the membrane permeation experiment so as to obtain an experiment result.
Description
Technical Field
The utility model relates to a membrane passes through research technical field, concretely relates to high-pressure membrane based on gas mass flow control technique sees through equipment.
Background
In the traditional membrane permeation research process, the following steps are basically required: 1. preparing process gas and background gas; 2. building a membrane permeation pipeline; 3. carrying out quantitative detection; but all of the several steps are performed by different devices.
When research is carried out, scientific research personnel need purchase and build the key equipment of each link by oneself respectively, and its process installation is complicated, still need to reequip or redesign each part sometimes, very waste time.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a high pressure membrane permeation device based on a gas mass flow control technology, which overcomes the problems in the related art at least to some extent.
In order to solve the technical problem, the utility model adopts the following technical scheme:
in a first aspect, a high pressure membrane permeation device based on gas mass flow control technology comprises:
the device comprises a gas flow control device, a membrane permeation experimental device and a gas analysis device which are connected in sequence; wherein the content of the first and second substances,
the gas flow control device is used for outputting test gas and transmitting the test gas into the membrane permeation experiment device, and the test gas is used for a membrane permeation experiment;
the membrane permeation experiment device is used for carrying out a membrane permeation experiment through the test gas;
the gas analysis device is used for analyzing the gas after the membrane permeation experiment so as to obtain an experiment result.
Optionally, the gas flow rate control device comprises a process gas output unit for outputting a process gas and a background gas output unit for outputting a background gas;
the process gas output unit and the background gas output unit are both provided with a gas mass flow controller and a stop valve;
the gas mass flow controller and the stop valve are used for controlling the flow of the output process gas and the background gas.
Optionally, the membrane permeation experimental device comprises a membrane pool, a membrane pool switch structure, a membrane pool sealing structure and a heating unit;
the membrane pool comprises an upper cover, a lower cover and a gas transmission pipeline, wherein the gas transmission pipeline comprises a first gas transmission pipeline and a second gas transmission pipeline, the upper cover inputs process gas through the first gas transmission pipeline, and the lower cover inputs background gas through the second gas transmission pipeline;
the membrane pool switch structure is used for opening or closing the membrane pool, and the heating unit is arranged at the bottom of the lower cover of the membrane pool and used for heating the lower cover of the membrane pool.
Optionally, the gas transmission pipeline is of a multi-coil gas circuit structure.
Optionally, the material of the membrane pool sealing structure is any one of fluororubber, nitrile butadiene rubber and perfluororubber.
Optionally, the membrane pool switch structure comprises a motor and a screw rod, one end of the screw rod is connected with the membrane pool upper cover and drives the upper cover to move up and down so as to open or close the membrane pool.
Optionally, the gas control device further comprises a pressure sensor and a one-way valve, wherein the pressure sensor is used for detecting the gas pressure in the gas flow control device; the check valve is arranged on an input pipeline of the test gas.
Optionally, the gas treatment device further comprises a waste treatment device for treating the gas after the experiment.
Optionally, the membrane pool further comprises a backpressure valve, and the backpressure valve is arranged at an outlet of the upper cover of the membrane pool.
Optionally, the method further includes: and the human-computer interaction device is used for setting parameters of the gas flow control device, the membrane permeation experiment device and the gas analysis device.
The utility model adopts the above technical scheme, can realize following technological effect: in the application, a gas flow control device, a membrane permeation experimental device and a gas analysis device are connected in sequence; the gas flow control device is used for outputting test gas and transmitting the test gas into the membrane permeation experiment device, and the test gas is used for a membrane permeation experiment; the membrane permeation experiment device is used for carrying out a membrane permeation experiment through the test gas; the gas analysis device is used for analyzing the gas after the membrane permeation experiment so as to obtain an experiment result. So, through gas control device with test gas transmission to the membrane pass through the experimental apparatus, experiment in the membrane passes through the device, then carry out the analysis by gas analysis device, obtain the experimental result, like this, alright with integrate on same equipment with a plurality of links, when needing to carry out the membrane and pass through the research, needn't build equipment again, avoided complicated installation for the membrane passes through the research process more convenient, swift.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-pressure membrane permeation device based on a gas mass flow control technology according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a gas flow control device in a high-pressure membrane permeation device based on a gas mass flow control technology according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a high-pressure membrane permeation device based on a gas mass flow control technology according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a high-pressure membrane permeation device based on a gas mass flow control technology according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a membrane tank upper cover in a high-pressure membrane permeation device based on a gas mass flow control technology according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a membrane tank lower cover in a high-pressure membrane permeation device based on a gas mass flow control technology according to an embodiment of the present invention.
Reference numerals:
the device comprises a gas flow control device-1, a membrane permeation experimental device-2, a gas analysis device-3, a gas mass flow controller-11, a stop valve-12, a pressure sensor-13, a one-way valve-14, a process gas storage tank-15, a background gas storage tank-16, a mixed gas storage tank-17, an upper cover-21, a lower cover-22, a gas transmission pipeline-23, a first gas transmission pipeline-231, a second gas transmission pipeline-232, a screw rod-24, a heating unit-25, a man-machine interaction device-4 and a shell-5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
For a better understanding of the solution provided by the present application, the following needs to be understood:
in the conventional membrane permeation research process, several steps are basically required: 1, preparing process gas and background gas, 2, building a membrane permeation pipeline, and 3, quantitatively detecting. However, there is no equipment dedicated to the research in these links, and researchers need to purchase the key equipment for constructing each link separately. For example, the device for controlling the gas flow is generally a gas control for general device research, such as a vacuum magnetron sputtering direction, a petrochemical direction, and the like, the existing film gas path device is mainly applied to oxygen permeation and carbon dioxide devices of a plastic film in food packaging, and such devices are often applied to a normal pressure environment, and are generally not applicable to scientific researches in the current popular fuel cell direction, graphene direction, aerospace field, and the like, because the research needs to research the permeability of oxygen and carbon dioxide of the film, and other nearly hundreds of gas molecules (hydrogen, sulfur dioxide, hydrocarbons, alkanes, and the like) to be researched.
In summary, the conventional equipment has no special equipment for the whole set of membrane permeation research solution in the scientific research field, and scientific researchers build research and development equipment which is time-consuming and labor-consuming; each part of the traditional equipment has no specificity and needs to be modified or redesigned; traditional research cannot be integrated into a whole research and development environment, so that a great deal of scientific research personnel is distracted; the traditional equipment is only suitable for the membrane permeation research of a very small number of gas types, and the gas path structure design and the material of the traditional equipment select the research gas which is not suitable for the emerging research field; the detection film of the traditional equipment is basically a plastic film, so the use environment is only normal pressure, and the research requirements of the emerging scientific research field can not be met.
Examples
Fig. 1 is a schematic structural diagram of a high-pressure membrane permeation device based on a gas mass flow control technology according to an embodiment of the present invention. As shown in fig. 1, the present embodiment provides a high-pressure membrane permeation device based on a gas mass flow control technique, including:
the device comprises a gas flow control device 1, a membrane permeation experimental device 2 and a gas analysis device 3 which are connected in sequence; the gas flow control device is used for outputting test gas and transmitting the test gas into the membrane permeation experiment device, and the test gas is used for a membrane permeation experiment;
the membrane permeation experiment device is used for carrying out a membrane permeation experiment through the test gas;
the gas analysis device is used for analyzing the gas after the membrane permeation experiment so as to obtain an experiment result.
In this embodiment, transmit test gas to the membrane through gas control device and pass through the experimental apparatus, experiment in the membrane passes through the device, then carry out the analysis by gas analysis device, obtain the experimental result, like this, alright with integrate on same equipment with a plurality of links, when needing to carry out the membrane and pass through the research, needn't build equipment again, avoided complicated installation for the membrane passes through the research process more convenient, swift.
Specifically, fig. 2 is a schematic structural diagram of a gas flow control device of a high-pressure membrane permeation device based on a gas mass flow control technology according to an embodiment of the present invention, referring to fig. 2, the gas flow control device includes a process gas output unit for outputting a process gas and a background gas output unit for outputting a background gas. The process gas output unit and the background gas output unit are both provided with a gas mass flow controller 11 and a stop valve 12, and the gas mass flow controller and the stop valve control the flow of the output process gas and the flow of the output background gas.
In some embodiments, the gas control device further comprises a pressure sensor 13 for detecting the gas pressure within the gas flow control device and a one-way valve 14; the check valve is arranged on an input pipeline of the test gas. By arranging the check valve, the backflow of the output test gas can be avoided.
Furthermore, the gas control device is composed of two parts, one part is responsible for outputting the process gas, and the other part is responsible for outputting the background gas. The core elements of the gas control are a gas mass flow controller and an electromagnetic stop valve, and further comprise gas circuit elements such as a pressure sensor or a pressure gauge, a one-way valve and the like, wherein the quantity and the type of the used gas mass flow controller are changed according to the process requirements researched by a user. Specifically, referring to the example in fig. 2, the output of the process gas is controlled by the gas mass flow controllers for different process gases, the stop valves are opened to input the gases in the process gas tanks 15 into the mixing gas tank 17, and then the process gas is input into the membrane tank upper cover. It will be appreciated that where only one process gas is required, only the shut-off valve for that process gas may be opened. In addition, the output of the background gas is also controlled by the gas mass flow controller, and the stop valve is opened to input the gas in the background gas storage tank 16 to the membrane pool lower cover.
Generally, in the research of the field of new energy and new materials, nearly one hundred types (hydrogen, sulfur dioxide, hydrocarbons, alkanes and the like) can be used for a process gas output part, but no more than 6 types of gases are used at the same time, 2-6 gas paths taking a gas mass flow controller used by corresponding process gases as a core element can be covered, and the gas mass flow controller used by corresponding process gases can be used for controlling the flow by using the same channel, so that the gas control device can basically meet the current experiment of 90% of the film permeation research direction by arranging a plurality of process gas output units.
In some embodiments, the membrane permeation test device comprises a membrane pool, a membrane pool opening and closing structure, a membrane pool sealing structure and a heating unit.
The membrane pool comprises an upper cover 21, a lower cover 22 and a gas transmission pipeline 23, wherein the gas transmission pipeline comprises a first gas transmission pipeline 231 and a second gas transmission pipeline 232, the upper cover inputs process gas through the first gas transmission pipeline, and the lower cover inputs background gas through the second gas transmission pipeline; wherein the first gas transmission pipeline is connected with the process gas output unit, and the second gas transmission pipeline is connected with the background gas output unit. Specifically, referring to fig. 5 and 6, the upper cover and the lower cover of the membrane tank are configured such that, in performing an experiment, a membrane to be tested is fixed at a central position of the base to perform the experiment.
The membrane pool switch structure is used for opening or closing the membrane pool, and the heating unit 25 is arranged at the bottom of the lower cover of the membrane pool and used for heating the lower cover of the membrane pool.
The heating unit and the membrane pool base realize faster heat exchange with heat-conducting silica gel and are fixedly connected with the membrane pool base. The heating temperature is heated from normal temperature to 200 ℃, and the requirements of film penetration research experiments at high temperature are met. The heating temperature of the heating unit can be set as a system parameter through the interpersonal interaction device.
In some embodiments, referring to fig. 3, the membrane tank opening and closing structure includes a motor and a screw 24, one end of the screw is connected to the membrane tank upper cover and drives the upper cover to move up and down to open or close the membrane tank.
The switch structure of the membrane pool does not need manual operation, but drives the screw rod by the stepping motor which is longitudinally arranged, thereby ensuring the repeatability of opening or closing the membrane pool through accurate longitudinal movement and avoiding the stress error caused by manual operation.
Further, referring to fig. 4, the gas transmission pipeline is a multi-coil gas path structure. When testing, drive the lead screw at the motor and reciprocate, drive the membrane pond upper cover simultaneously and remove, through all setting up first gas transmission pipeline and second gas transmission pipeline into many circles coil pipe gas circuit structure, can play the effect of buffering when the upper cover reciprocates to, the mode of coil pipe makes the pipeline not only have resistance to compression corrosion resistance, and certain flexibility still provides the space that must reciprocate. Therefore, the film-penetrating device has the advantages that the necessity of replacing the tested film is ensured, the stress repeatability can be ensured, and most importantly, the working pressure not lower than 3MPa can be borne, which is much higher than that of the existing film-penetrating device.
Wherein, the gas transmission pipeline is all that 316L stainless steel constitutes, and the pipe fitting factor that the membrane pond upper cover that has stainless steel pipeline can reciprocate has used the many circles coil pipe gas circuit structure of 3mm external diameter, and the coil pipe number of turns just can guarantee the membrane pond under the unchangeable circumstances of base more than 20 circles, and the upper cover can be guaranteed 15CM repetition parallel translation about from top to bottom. It is understood that the above values can be set according to actual situations, and the values in the present embodiment are only examples. In addition, since the types of gas may involve corrosive gas and high pressure of more than 1MPa, the entire pipe line must be a stainless steel pipe line and withstand pressure of 3MPa or more.
The mode sealing structure can be but not limited to adopt fluororubber, nitrile rubber, perfluororubber and other sealing materials, and the requirement is determined according to target process gases used in scientific research directions, and different gases correspond to different sealing modes.
In some embodiments, the device further comprises a waste treatment device and a back pressure valve, wherein the back pressure valve is arranged at the outlet of the membrane pool upper cover, and the waste treatment device is used for treating the experimental gas.
The process gas flowing through the upper cover of the membrane pool, in the modern new energy new material scientific research, the transmittance of the measured membrane in a high-pressure environment is often required to be researched, so that the whole system is designed to resist pressure of more than 3MPa, and as the fluidity and real-time property of the gas are required to be maintained, the process gas is required to maintain a precise gas proportional relation under the premise of ensuring the pressure, wherein the gas component proportional relation is realized by a precise gas mass flow controller, the pressure is realized by a backpressure valve which can control the pressure in front of the valve, so that a gas source pressure reducer at the inlet of the upper cover provides inlet pressure which is higher than the pressure set by the backpressure, the gas source and a pressure reducing valve are generally arranged outside the equipment and are provided with the gas source pressure by the equipment integrally with a steel cylinder, and the gas passes through the backpressure valve at the rear end of the upper cover of the membrane pool to ensure that the pressure of the, the outlet of the backpressure valve is directly used for emptying the atmospheric environment, so that corresponding subsequent treatment is required according to different process gases, for example, pure water is used for ammonia absorption, alkaline liquid is used for acid gas absorption, and the like. In addition, the back pressure valve at the rear end can reach the testing pressure by adjusting the pressure reducing valve at the front end.
Optionally, the high-pressure membrane permeation device based on the gas mass flow control technology further comprises an alarm device, and the alarm device can give an alarm when the gas mass flow controller is uncontrollable or a stop valve fails.
In some embodiments, the high pressure membrane permeation device based on gas mass flow control technology further comprises: and the human-computer interaction device 4 is used for setting parameters of the gas flow control device, the membrane permeation experiment device and the gas analysis device.
The human-computer interaction device adopts a touch screen, acquires parameters in equipment by setting an acquisition module, controls the movement of the stepping motor by an internal control system, automatically controls the temperature of the heating platform, controls the voice-operated alarm action quality flow controller, controls the electromagnetic stop valve and the like. The man-machine interaction device allows the user to set parameters, and comprises the following steps: the membrane tank is opened to high, membrane operating temperature, and gas flow sets for, and the gas circuit is opened and is closed etc. operation.
In addition, the acquisition module can be realized by using a PLC or an acquisition card.
It is understood that the high pressure membrane permeation device based on gas mass flow control technology of the present application may have the above-mentioned related components disposed in the housing 5 for easy movement. Specifically, referring to fig. 3, the membrane tank and the membrane tank switch are arranged outside the shell to facilitate the experiment, and the gas transmission pipeline is integrated at the bottom of the membrane permeation device.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by suitable instruction execution devices. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A high pressure membrane permeation device based on gas mass flow control technology, comprising:
the device comprises a gas flow control device, a membrane permeation experimental device and a gas analysis device which are connected in sequence; wherein the content of the first and second substances,
the gas flow control device is used for outputting test gas and transmitting the test gas into the membrane permeation experiment device, and the test gas is used for a membrane permeation experiment;
the membrane permeation experiment device is used for carrying out a membrane permeation experiment through the test gas;
the gas analysis device is used for analyzing the gas after the membrane permeation experiment so as to obtain an experiment result.
2. The apparatus of claim 1, wherein the gas flow rate control device comprises a process gas output unit for outputting a process gas and a background gas output unit for outputting a background gas;
the process gas output unit and the background gas output unit are both provided with a gas mass flow controller and a stop valve;
the gas mass flow controller and the stop valve are used for controlling the flow of the output process gas and the background gas.
3. The apparatus of claim 1, wherein the membrane permeation experimental device comprises a membrane pool, a membrane pool opening and closing structure, a membrane pool sealing structure and a heating unit;
the membrane pool comprises an upper cover, a lower cover and a gas transmission pipeline, wherein the gas transmission pipeline comprises a first gas transmission pipeline and a second gas transmission pipeline, the upper cover inputs process gas through the first gas transmission pipeline, and the lower cover inputs background gas through the second gas transmission pipeline;
the membrane pool switch structure is used for opening or closing the membrane pool, and the heating unit is arranged at the bottom of the lower cover of the membrane pool and used for heating the lower cover of the membrane pool.
4. The apparatus of claim 3, wherein the gas delivery conduit is a multi-turn coil gas path structure.
5. The apparatus according to claim 3, wherein the membrane pool sealing structure is made of any one of fluororubber, nitrile butadiene rubber and perfluororubber.
6. The apparatus of claim 3, wherein the membrane tank opening and closing structure comprises a motor and a screw rod, one end of the screw rod is connected with the membrane tank upper cover and drives the upper cover to move up and down so as to open or close the membrane tank.
7. The apparatus of claim 1, wherein the gas flow control device further comprises a pressure sensor for detecting a gas pressure within the gas flow control device and a one-way valve; the check valve is arranged on an input pipeline of the test gas.
8. The apparatus of claim 1, further comprising a waste disposal device for disposing of the post-experimental gas.
9. The apparatus of claim 1, further comprising a back pressure valve disposed at an outlet of the membrane cell upper cover.
10. The apparatus of claim 1, further comprising: and the human-computer interaction device is used for setting parameters of the gas flow control device, the membrane permeation experiment device and the gas analysis device.
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