CN214147944U - Hydrogen-containing tail gas catalytic conversion device - Google Patents
Hydrogen-containing tail gas catalytic conversion device Download PDFInfo
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- CN214147944U CN214147944U CN202022400177.4U CN202022400177U CN214147944U CN 214147944 U CN214147944 U CN 214147944U CN 202022400177 U CN202022400177 U CN 202022400177U CN 214147944 U CN214147944 U CN 214147944U
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Abstract
The utility model provides a hydrogen-containing tail gas catalytic conversion device, which comprises a gas mixer, an air compressor, a catalytic conversion reactor, a heat exchanger and a control system; the gas mixer is connected with the hydrogen-containing tail gas through a tail gas pipeline by a gas inlet; the air compressor is connected with the other air inlet of the air mixer through an air pipeline; the catalytic conversion reactor is connected with the gas outlet of the gas mixer through a reaction pipeline by a gas inlet, and the gas outlet of the catalytic conversion reactor is connected with a gas exhaust pipeline; the heat exchanger is arranged on the reaction pipeline; the control system is configured to collect hydrogen contents of the mixed gas in the tail gas pipeline, the reaction pipeline and the exhaust pipeline respectively, and accordingly control the gas mixer, the air compressor and the catalytic conversion reactor.
Description
Technical Field
The utility model relates to a hydrogen low temperature catalytic combustion technical field especially relates to a hydrogen-containing tail gas catalytic conversion device.
Background
Hydrogen is a flammable and explosive gas, and is easy to gather in the upper space of a laboratory due to small molecular weight, so that great potential safety hazards exist. In order to ensure the safety of the laboratory, hydrogen is not allowed to be discharged into a ventilation system of the laboratory, and certain potential safety hazards also exist when the hydrogen is directly discharged. In recent years with H2For the rapid development of fuel cell technology of energy, research of related technologies also becomes a hotspot in the scientific and technological field and the industrial field, and the problem of prior solution in research, evaluation, test, analysis and other hydrogen-related laboratories of fuel cells is ensured, so that the safety of the laboratories is guaranteed.
H2The flameless catalytic combustion can be carried out on the surface of the supported noble metal catalyst, the reaction has the advantages of low pollution, high combustion efficiency, wide combustible range and the like, and is H2A transformation mode with high efficiency and good stability. Because of H in the tail gas of hydrogen-related laboratory2The content is uncertain, and the H in the hydrogen-containing tail gas needs to be monitored in real time2The content of (a). To ensure safe, low temperature catalytic conversion of hydrogen-containing tail gas, how to measure H2Content and discharge flow rate, realizes intelligent distribution of combustion-supporting gas and air, and enables the H to enter the reactor2The concentration is below the explosive limit, which is a critical issue to be addressed. In addition, how to ensure H in the exhaust gas2The content of (A) meets the emission requirement and the exhaust gas which does not meet the emission requirementAnother problem to be solved is the principle.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at overcomes above-mentioned prior art's at least defect, provides one kind and can guarantee to get into the hydrogen concentration before the reactor below the explosion limit to guarantee that the hydrogen content in the tail gas reaches the hydrogen-containing tail gas catalytic conversion device who discharges the requirement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
according to one aspect of the present invention, there is provided a hydrogen-containing tail gas catalytic conversion device; the device comprises a gas mixer, an air compressor, a catalytic conversion reactor, a heat exchanger and a control system; the gas mixer is connected with the hydrogen-containing tail gas through a tail gas pipeline by a gas inlet; the air compressor is connected to the other air inlet of the air mixer through an air pipeline; the catalytic conversion reactor is connected with the gas outlet of the gas mixer through a reaction pipeline by a gas inlet, and the gas outlet of the catalytic conversion reactor is connected with a gas exhaust pipeline; the heat exchanger is arranged on the reaction pipeline; the control system is configured to collect hydrogen contents of the mixed gas in the tail gas pipeline, the reaction pipeline and the exhaust pipeline respectively, and accordingly control the gas mixer, the air compressor and the catalytic conversion reactor.
According to one embodiment of the present invention, the ratio of the hydrogen-containing tail gas mixed by the gas mixer to the air delivered by the air compressor is 1: 100-1: 10.
According to one embodiment of the present invention, the flow rate of the mixed gas output from the gas mixer is 100ml/min to 1000 ml/min.
According to the utility model discloses an one of them embodiment, the air compressor machine is oil-free air compressor machine.
According to one embodiment of the present invention, the temperature of the mixed gas output from the heat exchanger is 50 ℃ to 350 ℃.
According to one embodiment of the present invention, the temperature of the mixed gas output from the heat exchanger is 100 ℃ to 250 ℃.
According to one of the embodiments of the present invention, the catalytic conversion reactor is a single-tube reactor, a multi-tube reactor or a microchannel reactor.
According to one embodiment of the present invention, the catalytic conversion reactor is a quartz tube single-tube reactor.
According to one embodiment of the present invention, the hydrogen sensor further comprises a plurality of hydrogen sensors; the hydrogen sensors are respectively arranged on the tail gas pipeline, the reaction pipeline and the exhaust pipeline and are respectively connected to the control system so as to respectively collect the hydrogen content of the mixed gas in the tail gas pipeline, the reaction pipeline and the exhaust pipeline.
According to one embodiment of the present invention, the device further comprises a discharge circulation device; the discharge circulating device is arranged on the exhaust pipeline and is connected to the other gas inlet of the gas mixer through a circulating pipeline; wherein the control system is configured to control the discharge circulation device to circularly convey the mixed gas to the gas mixer, repeat the circulation reaction until the hydrogen content of the mixed gas in the exhaust pipeline meets a preset value, and then discharge the mixed gas by the exhaust pipeline.
According to the above technical scheme, the utility model provides a hydrogen-containing tail gas catalytic conversion device's advantage lies in with positive effect:
the utility model provides a hydrogen-containing tail gas catalytic conversion device contains gas mixer, air compressor machine, catalytic conversion reactor, heat exchanger and control system. Through the structure design, the utility model discloses can control and guarantee that the hydrogen content in the mist before getting into the catalytic conversion reactor is less than the explosion limit to can guarantee that the hydrogen content of the tail gas of discharging by the exhaust pipe emission accords with the emission requirement. The utility model discloses can realize automation, the intelligent control of above-mentioned function through control system, improve the conversion efficiency of hydrogen-containing tail gas, realize the safety of hydrogen-containing tail gas, green emission.
Drawings
The various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
fig. 1 is a system diagram illustrating a hydrogen-containing exhaust gas catalytic conversion device according to an exemplary embodiment.
The reference numerals are explained below:
100. a gas mixer;
110. a tail gas pipeline;
200. an air compressor;
210. an air line;
300. a catalytic conversion reactor;
310. a reaction pipeline;
320. an exhaust line;
400. a heat exchanger;
500. a discharge circulation device;
510. a circulation line;
600. a control system;
610. a hydrogen sensor.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.
In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.
Referring to fig. 1, a system diagram of a hydrogen-containing exhaust gas catalytic converter according to the present invention is representatively illustrated. In this exemplary embodiment, the hydrogen-containing exhaust gas catalytic conversion device provided by the present invention is described by taking an example of application to catalytic conversion treatment of hydrogen-containing exhaust gas. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the embodiments described below in order to utilize the inventive related designs in other types of processes, and still be within the scope of the principles of the hydrogen-containing exhaust gas catalytic conversion unit set forth herein.
As shown in fig. 1, in the present embodiment, the hydrogen-containing exhaust gas catalytic conversion device provided by the present invention includes a gas mixer 100, an air compressor 200, a catalytic conversion reactor 300, a heat exchanger 400, and a control system 600. Specifically, the gas mixer 100 includes a plurality of gas inlets and one gas outlet, and is configured to mix the hydrogen-containing off-gas to be treated with combustion air and to deliver the mixed gas to the catalytic conversion reactor 300. The gas mixer 100 is connected to the hydrogen-containing off-gas via an off-gas line 110 at a gas inlet. The air compressor 200 is connected to the other inlet of the gas mixer 100 via an air line 210. The catalytic conversion reactor 300 includes a gas inlet and a gas outlet, and serves to perform a catalytic conversion process on hydrogen in the mixed gas. The catalytic conversion reactor 300 is connected to the gas outlet of the gas mixer 100 through a reaction pipeline 310 at the gas inlet, and the gas outlet of the catalytic conversion reactor 300 is connected to a gas outlet pipeline 320. The heat exchanger 400 is disposed on the reaction line 310 and is used to heat the mixed gas containing the hydrogen-containing off-gas and the combustion air, and the heating process is performed within the explosion limit of hydrogen. The control system 600 is used for respectively collecting hydrogen contents of the mixed gas in the tail gas pipeline 110, the reaction pipeline 310 and the exhaust pipeline 320, and accordingly controlling the gas mixer 100, the air compressor 200 and the catalytic conversion reactor 300. Through the structure design, the utility model provides a hydrogen-containing tail gas catalytic conversion device can control and guarantee that the hydrogen content in the mist before getting into catalytic conversion reactor 300 is less than the explosion limit to can guarantee that the hydrogen content of the tail gas of discharging by exhaust pipe 320 accords with the emission requirement. The utility model discloses can realize automation, the intelligent control of above-mentioned function through control system 600, improve the conversion efficiency of hydrogen-containing tail gas, realize hydrogen-containing tail gas's safety, green emission.
Optionally, in the present embodiment, the ratio of the hydrogen-containing off-gas mixed by the gas mixer 100 to the air delivered by the air compressor 200 may be preferably in a range of 1:100 to 1: 10.
Alternatively, in this embodiment, the flow rate of the mixed gas output by the gas mixer 100 may preferably be 100ml/min to 1000ml/min, such as 100ml/min, 200ml/min, 450ml/min, 1000ml/min, etc., in other embodiments, the flow rate of the mixed gas output by the gas mixer 100 may also be less than 100ml/min, or may be greater than 1000ml/min, such as 95ml/min, 1050ml/min, etc., without being limited by this embodiment.
Alternatively, in the present embodiment, the air compressor 200 may preferably be an oil-free air compressor 200.
Alternatively, in the present embodiment, the temperature of the mixed gas output by the heat exchanger 400, i.e., the mixed gas including the hydrogen-containing off-gas and the combustion air, heated by the heat exchanger 400 may preferably be 50 ℃ to 350 ℃, for example, 50 ℃, 75 ℃, 260 ℃, 350 ℃, and the like. In other embodiments, the temperature of the mixed gas output by the heat exchanger 400 may also be less than 50 ℃, or may be greater than 350 ℃, for example, 48 ℃, 360 ℃, and the like, which is not limited by the present embodiment.
Further, based on the design that the temperature of the mixed gas output from the heat exchanger 400 is 50 to 350 ℃, in the present embodiment, the temperature of the mixed gas output from the heat exchanger 400 may be more preferably 100 to 250 ℃, for example, 100 ℃, 140 ℃, 210 ℃, 250 ℃, etc., and is not limited to the present embodiment.
Alternatively, in the present embodiment, the catalytic conversion reactor 300 may preferably be a single-tube reactor. In other embodiments, the catalytic conversion reactor 300 may also employ other types of reaction equipment, such as a multi-tube reactor, a microchannel reactor, etc., and is not limited to the embodiment.
Further, based on the design of the catalytic conversion reactor 300 using a single-tube reactor, in the present embodiment, the catalytic conversion reactor 300 may further preferably be a quartz-tube single-tube reactor. For example, the catalytic conversion reactor 300 can be a single-tube reactor with a quartz tube (steel tube) of 300mm × 20mm, and the reactor is filled with 0.05 g-5 g of supported Pt/Al2O3Catalyst, and 5g to 12g of auxiliary agent Al2O3Fully mixing, tabletting and sieving to obtain 40-80 mesh granules, and filling the granules into a reactor.
Optionally, as shown in fig. 1, in this embodiment, the hydrogen-containing exhaust catalytic converter provided by the present invention may further include a plurality of hydrogen sensors 610. Specifically, the hydrogen sensors 610 are respectively disposed on the exhaust pipeline 110, the reaction pipeline 310 and the exhaust pipeline 320, and the hydrogen sensors 610 are respectively connected to the control system 600. Accordingly, the control system 600 can collect the hydrogen content of the mixed gas in the exhaust pipeline 110, the reaction pipeline 310 and the exhaust pipeline 320 through the hydrogen sensors 610, and control each functional device accordingly.
Further, as shown in fig. 1, based on the design in which the reaction line 310 is provided with the hydrogen sensor 610, in the present embodiment, the hydrogen sensor 610 provided on the reaction line 310 may be specifically located between the gas mixer 100 and the heat exchanger 400.
Further, as shown in fig. 1, based on the design in which the exhaust line 320 is provided with the hydrogen sensor 610, and simultaneously based on the design in which the exhaust line 320 is provided with the exhaust circulation device 500, in the present embodiment, the hydrogen sensor 610 provided on the exhaust line 320 may be specifically located between the catalytic conversion reactor 300 and the exhaust circulation device 500.
Optionally, as shown in fig. 1, in this embodiment, the hydrogen-containing exhaust catalytic converter of the present invention may further include an exhaust recycling device 500. Specifically, the exhaust circulation device 500 is disposed on the exhaust line 320 and is connected to a further inlet of the gas mixer 100 through a circulation line 510. Accordingly, for example, when the hydrogen content of the mixed gas processed by the catalytic conversion reactor 300 and discharged to the exhaust line 320 does not meet a preset value (for example, the hydrogen content required for discharge), the control system 600 can control the discharge circulation device 500 to circulate and convey the mixed gas to the gas mixer 100 through the circulation line 510, and control the functional devices of the gas mixer 100, the heat exchanger 400, the catalytic conversion reactor 300, and the like to repeat the circulation reaction until the hydrogen content of the mixed gas in the exhaust line 320 meets the preset value, and then the mixed gas is discharged from the exhaust line 320.
Further, based on the design that the hydrogen-containing exhaust gas catalytic conversion device comprises the exhaust circulation device 500, in the present embodiment, the exhaust circulation device 500 may comprise at least one automatic valve, such as but not limited to a three-way solenoid valve. Specifically, one inlet of the automatic valve is connected to the outlet of the catalytic conversion reactor 300 through a section of the exhaust line 320, one outlet of the automatic valve is connected to another section of the exhaust line 320, and the other outlet is connected to the circulation line 510. On the basis, the control system 600 sends a corresponding control instruction to the automatic valve according to the hydrogen content of the mixed gas collected by the hydrogen sensor 610 arranged on the exhaust pipeline 320 through comparison with a preset value, so as to realize the function switching of the discharge and circulation of the discharge circulation device 500.
It should be noted here that the hydrogen-containing exhaust gas catalytic conversion devices shown in the drawings and described in the present specification are only a few examples of the many kinds of hydrogen-containing exhaust gas catalytic conversion devices that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the hydrogen-containing exhaust gas catalytic converter shown in the drawings or described in the present specification.
Based on the above detailed description of an exemplary embodiment of the hydrogen-containing exhaust gas catalytic converter provided by the present invention, the following description will exemplify the operation of the hydrogen-containing exhaust gas catalytic converter.
Utilize the utility model provides a hydrogen-containing tail gas catalytic conversion device detects the hydrogen content in the laboratory tail gas through the hydrogen sensor 610 that sets up at tail gas pipeline 110, feeds back control system 600 with it, and through the combustion-supporting air mass flow that control system 600 analysis automatic determination hydrogen-containing tail gas and air compressor machine 200 provided, through intelligent distribution with hydrogen-containing tail gas and combustion-supporting air mix in gas mixer 100. Then, the mixed gas containing the hydrogen-containing off-gas and the combustion air enters the reaction line 310. The mixed gas (which may be measured by the hydrogen sensor 610 disposed on the reaction line 310 for safe content of hydrogen) is heated by the heat exchanger 400 within the explosion limit of hydrogen by passing through the heat exchanger 400 via the reaction line 310. The heated mixed gas enters the catalytic conversion reactor 300, the hydrogen sensor 610 arranged on the exhaust pipeline 320 detects the hydrogen content in the reacted mixed gas and sends the hydrogen content to the control system 600, the control system 600 judges that the hydrogen content at the position meets the emission standard requirement, the emission circulation device 500 is controlled to emit, the control system 600 judges that the hydrogen content at the position does not meet the emission requirement of the hydrogen content, the control system 600 sends a control instruction to the emission circulation device 500, the emission circulation device 500 transmits the mixed gas to the gas mixer 100 through the circulation pipeline 510 again, and the control system 600 performs secondary reaction according to the above process until the hydrogen content of the mixed gas at the position, which is detected by the hydrogen sensor 610 arranged on the exhaust pipeline 320, meets the emission standard of the hydrogen-containing tail gas. In other words, the control system 600 can collect the hydrogen content and flow information in the exhaust to be discharged, automatically determine the distribution parameters before the reaction, control the temperature of the catalytic conversion reactor 300, and determine whether to perform the exhaust discharge, the recycling treatment, or the adjustment of the reaction parameters of the catalytic conversion reactor 300 according to whether the hydrogen content in the exhaust meets the discharge standard.
To sum up, the utility model provides a hydrogen-containing tail gas catalytic conversion device contains gas mixer, air compressor machine, catalytic conversion reactor, heat exchanger and control system. Through the structure design, the utility model discloses can control and guarantee that the hydrogen content in the mist before getting into the catalytic conversion reactor is less than the explosion limit to can guarantee that the hydrogen content of the tail gas of discharging by the exhaust pipe emission accords with the emission requirement. The utility model discloses can realize automation, the intelligent control of above-mentioned function through control system, improve the conversion efficiency of hydrogen-containing tail gas, realize the safety of hydrogen-containing tail gas, green emission. Particularly, the utility model provides a hydrogen-containing tail gas catalytic conversion device can realize carrying out the automatic distribution of combustion-supporting gas air according to the ratio under the explosion safety requirement to the uncertain laboratory hydrogen-containing tail gas of hydrogen content.
Exemplary embodiments of a hydrogen-containing exhaust gas catalytic converter according to the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.
While the catalytic hydrogen-containing exhaust gas conversion device of the present invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.
Claims (10)
1. A hydrogen-containing exhaust gas catalytic conversion device, comprising:
the gas mixer is connected with the hydrogen-containing tail gas through a tail gas pipeline by a gas inlet;
the air compressor is connected to the other air inlet of the air mixer through an air pipeline;
the catalytic conversion reactor is connected with the gas outlet of the gas mixer through a reaction pipeline by a gas inlet, and the gas outlet of the catalytic conversion reactor is connected with a gas exhaust pipeline;
the heat exchanger is arranged on the reaction pipeline; and
a control system configured to collect hydrogen contents of the mixed gas in the tail gas pipeline, the reaction pipeline and the exhaust pipeline, respectively, thereby controlling the gas mixer, the air compressor and the catalytic conversion reactor.
2. The catalytic conversion device for tail gas containing hydrogen according to claim 1, wherein the ratio of the tail gas containing hydrogen mixed by the gas mixer to the air delivered by the air compressor is 1: 100-1: 10.
3. The catalytic conversion apparatus for hydrogen-containing off-gas according to claim 1, wherein the flow rate of the mixed gas output by the gas mixer is 100ml/min to 1000 ml/min.
4. The catalytic conversion device for hydrogen-containing tail gas according to claim 1, wherein the air compressor is an oil-free air compressor.
5. The catalytic conversion apparatus for hydrogen-containing tail gas according to claim 1, wherein the temperature of the mixed gas output by the heat exchanger is 50 ℃ to 350 ℃.
6. The catalytic conversion apparatus for hydrogen-containing exhaust gas according to claim 5, wherein the temperature of the mixed gas output by the heat exchanger is 100 ℃ to 250 ℃.
7. The catalytic conversion apparatus for hydrogen-containing off-gas according to claim 1, wherein the catalytic conversion reactor is a single-tube reactor, a multi-tube reactor or a microchannel reactor.
8. The catalytic conversion apparatus for hydrogen-containing off-gas according to claim 7, wherein the catalytic conversion reactor is a quartz tube single-tube reactor.
9. The catalytic conversion apparatus for hydrogen-containing exhaust gas according to claim 1, further comprising:
and the hydrogen sensors are respectively arranged on the tail gas pipeline, the reaction pipeline and the exhaust pipeline and are respectively connected to the control system so as to respectively collect the hydrogen content of the mixed gas in the tail gas pipeline, the reaction pipeline and the exhaust pipeline.
10. The catalytic conversion apparatus for hydrogen-containing exhaust gas according to claim 1, further comprising:
the discharge circulating device is arranged on the exhaust pipeline and is connected to the other gas inlet of the gas mixer through a circulating pipeline;
wherein the control system is configured to control the discharge circulation device to circularly convey the mixed gas to the gas mixer, repeat the circulation reaction until the hydrogen content of the mixed gas in the exhaust pipeline meets a preset value, and then discharge the mixed gas by the exhaust pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400177.4U CN214147944U (en) | 2020-10-26 | 2020-10-26 | Hydrogen-containing tail gas catalytic conversion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022400177.4U CN214147944U (en) | 2020-10-26 | 2020-10-26 | Hydrogen-containing tail gas catalytic conversion device |
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| CN214147944U true CN214147944U (en) | 2021-09-07 |
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| CN202022400177.4U Active CN214147944U (en) | 2020-10-26 | 2020-10-26 | Hydrogen-containing tail gas catalytic conversion device |
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