Catalyst module for gas treatment
By setting filamentous elements inside the catalyst channels to create turbulence and vibration, the problems of insufficient mass transfer and dust accumulation inside the catalyst channels are solved, thereby improving reaction efficiency and simplifying the catalyst regeneration process.
Patent Information
- Application Number
- CN202110852124.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-07-27
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2041-07-27
AI Technical Summary
In existing technologies, mass transfer within the catalyst channels is insufficient and dust accumulation can easily lead to blockage, affecting reaction efficiency.
Filament elements are placed inside the pores of the catalyst to create turbulence and vibrate under external force, thereby enhancing mass transfer and cleaning the pore walls to prevent dust accumulation.
It improves the mass transfer efficiency between the catalyst and the gas, prevents pore blockage, and simplifies the catalyst regeneration process.
Smart Images
Figure CN115672021B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gas treatment, and particularly relates to a catalyst module for gas treatment. BACKGROUND
[0002] The increase in energy demand caused by economic growth leads to the generation of atmospheric pollutants, and the treatment problems in many fields (such as thermal power, steel, chemical industry, etc.) are increasingly prominent, so the demand for gas treatment technology is also increasing. In order to improve the treatment effect of gas (such as polluted gas), the catalytic treatment method is often used. In the prior art, a shaped catalyst with multiple channels is generally used, and the gas to be treated flows through the channels of the shaped catalyst and mass transfer is carried out with the catalyst in the channels to carry out catalytic reaction. However, in the prior art, on the one hand, the mass transfer in the channel is not sufficient enough, which affects the overall reaction efficiency; on the other hand, dust is easy to accumulate in the channel, which leads to blockage. Therefore, it is urgent to develop a catalyst structure which can alleviate or even solve the above problems. SUMMARY
[0003] In view of the above problems, the present application provides a catalyst module for gas treatment which overcomes the above problems or at least partially solves the above problems.
[0004] One object of the present application is to provide a catalyst module which can enhance the mass transfer between the catalyst in the channel and the gas to be treated.
[0005] A further object of the present application is to alleviate or even solve the problem of blockage caused by dust accumulation in the channel.
[0006] In particular, according to an aspect of an embodiment of the present application, a catalyst module for gas treatment is provided, comprising:
[0007] a shaped catalyst having a plurality of channels arranged in parallel with each other, the plurality of channels extending through the shaped catalyst along a longitudinal direction of the shaped catalyst; and
[0008] a plurality of filamentary elements, the plurality of filamentary elements being arranged in at least a portion of the plurality of channels, one filamentary element being arranged in each of the at least a portion of the plurality of channels, each of the filamentary elements extending through the channel in which the filamentary element is arranged along the longitudinal direction, and each of the filamentary elements being configured to form a turbulent flow in the channel in which the filamentary element is arranged by the filamentary element when the gas to be treated flows through the channel in which the filamentary element is arranged.
[0009] Optionally, each of the filamentary elements is further configured to vibrate under the action of an external force to clean the wall surface of the channel in which the filamentary element is arranged.
[0010] Optionally, the shape of the filamentary element is in a wave shape or a spiral shape.
[0011] Optionally, the ratio of the maximum dimension of the filamentous element in a transverse direction perpendicular to the longitudinal direction to the pore diameter of the channel is 0.5-0.9.
[0012] Optionally, when the shape of the filamentous element is a spiral, the ratio of the pitch of the filamentous element to the outer diameter of the spiral is 0.4-5.0.
[0013] Optionally, the external force is generated by an airflow flowing through the channel provided with the filamentous element.
[0014] Optionally, the external force is applied to the filamentous element by an actuator.
[0015] Optionally, the catalyst module further comprises:
[0016] a first mounting rod and a second mounting rod respectively arranged at two ends of the longitudinal direction of the shaped catalyst, and two ends of each of the filamentous elements are respectively connected or fixed to the first mounting rod and the second mounting rod; and
[0017] the actuator, which is connected to at least one of the first mounting rod and the second mounting rod, and is configured to apply acoustic vibration to the filamentous element via the mounting rod connected thereto.
[0018] Optionally, the filamentous element is a resistance wire, and is further configured to heat the shaped catalyst to activate or regenerate the shaped catalyst after being powered on.
[0019] Optionally, the channel is a quadrilateral, hexagonal or circular channel, or a channel formed by a plate catalyst.
[0020] The catalyst module for gas treatment provided by the present application is provided with a filamentous element in at least a part of the channels of the shaped catalyst, which is configured to form a disturbance flow in the channel when the gas to be treated flows through the channel, so that the mass transfer between the catalyst in the channel and the gas to be treated is more sufficient, thereby improving the overall reaction efficiency.
[0021] Further, the filamentous element is further configured to vibrate under the action of an external force to clean the wall surface of the channel in which it is located, so that dust is not easily accumulated in the channel, thereby alleviating or even solving the problem of blockage caused by dust accumulation in the channel.
[0022] Further, the filamentous element is a resistance wire, and is further configured to heat the shaped catalyst to activate or regenerate the shaped catalyst after being powered on, thereby further improving the overall reaction efficiency and simplifying the catalyst regeneration operation.
[0023] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application and to implement the same according to the contents of the description, and in order to enable the above and other purposes, features and advantages of the present application to be more apparent and understandable, the specific embodiments of the present application are described below.
[0024] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of specific embodiments thereof, when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to illustrate preferred embodiments of the present application, and should not be considered limiting of the present application. Indeed, the drawings can illustrate subject matter not described herein, but which can be related to the present application. In the drawings:
[0026] Figure 1 a schematic longitudinal cross-sectional view of a catalyst module according to an embodiment of the present application is shown;
[0027] Figure 2 a schematic transversal cross-sectional view of one channel in a catalyst module according to an embodiment of the present application is shown;
[0028] Figure 3 a schematic view of a filamentary element of a catalyst module according to an embodiment of the present application is shown;
[0029] Figure 4 a schematic view of a filamentary element of a catalyst module according to another embodiment of the present application is shown. DETAILED DESCRIPTION
[0030] Exemplary embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.
[0031] To solve the above technical problem, the present application provides a catalyst module for gas treatment.
[0032] Figure 1 a schematic longitudinal cross-sectional view of a catalyst module 100 according to an embodiment of the present application is shown, Figure 2 a schematic transversal cross-sectional view of one channel 111 in a catalyst module 100 according to an embodiment of the present application is shown. Referring to Figure 1 and Figure 2As shown, the catalyst module 100 of the present invention generally includes a shaped catalyst 110 and multiple filamentary elements 120. The shaped catalyst 110 has a plurality of channels 111 arranged parallel to each other, the plurality of channels 111 being along the longitudinal direction of the shaped catalyst 110. Figure 1 The catalyst 110 extends through the substrate in the direction L. Multiple filamentary elements 120 are disposed in at least a portion of the multiple channels 111, with one filamentary element 120 disposed in each channel 111. Each filamentary element 120 extends longitudinally through the channel 111 it resides in, and each filamentary element 120 is configured to create turbulence within the channel 111 as the gas to be treated flows through it. It should be noted that... Figure 1 The shape and number of channels 111 shown are merely illustrative. Furthermore, to better highlight the channels 111 of the shaped catalyst 110 and the filamentary elements 120 for easier understanding, Figure 1 The outline of the shaped catalyst 110 is omitted from the text.
[0033] The gas treatment catalyst module 100 provided in this embodiment of the invention provides a filamentous element 120 in at least a portion of the channels 111 of the formed catalyst 110. The filamentous element 120 is configured to form turbulence in the channel 111 when the gas to be treated flows through it, so that the mass transfer between the catalyst and the gas to be treated in the channel 111 is more sufficient, thereby improving the overall reaction efficiency.
[0034] In some specific embodiments, the molded catalyst 110 can be various gas treatment catalysts, such as SCR catalysts for flue gas denitrification. Filament elements 120 may be provided only in a portion of the channels 111 of the molded catalyst 110. For example, the filament elements 120 may be concentrated in the channels 111 of the middle portion of the molded catalyst 110, or filament elements 120 may be provided in all channels 111 of the molded catalyst 110.
[0035] In a further embodiment, each filament 120 may also be configured to vibrate under external force to clean the wall of the channel 111 in which it is located. The filament 120 may generate longitudinal (direction L) and / or transverse vibrations under external force. The transverse direction mentioned herein is perpendicular to the longitudinal direction and parallel to the cross-section of the channel 111. Through the collision of the filament 120 with the wall of the channel 111 under transverse vibration and the scraping operation of the filament 120 on the wall of the channel 111 under longitudinal vibration, the wall of the channel 111 can be effectively cleaned, making it less likely for dust to accumulate in the channel 111, thereby alleviating or even solving the problem of dust accumulation and blockage in the channel 111.
[0036] The cross-sectional shape of the channels 111 of the shaped catalyst 110 can be a common channel cross-sectional shape, for example, can be quadrangular, hexagonal (in particular, regular hexagonal) or circular. There are fewer flow dead angles in the hexagonal or circular channels, and the contactable area with the filamentary element 120 is larger, thus achieving a better cleaning effect. The channels 111 can also be flat channels formed by a plate catalyst.
[0037] Figure 3 A schematic view of the filamentary element 120 of the catalyst module 100 according to an embodiment of the present application is shown; Figure 4 A schematic view of the filamentary element 120 of the catalyst module 100 according to another embodiment of the present application is shown. In some embodiments, as shown in Figure 3 The shape of the filamentary element 120 can be wavy, and the wave peak and wave valley parts of the wavy filamentary element 120 under vibration clean the wall surface of the channels 111. In other embodiments, as shown in Figure 4 The shape of the filamentary element 120 can be helical, and the filamentary element 120 can be a helical spring, and the longitudinal and transverse vibration of the spring cleans the wall surface of the channels 111. The helical filamentary element 120 can be closer to the surface of the channels 111 of the catalyst, thus achieving a better cleaning effect.
[0038] In order to ensure the cleaning effect of the filamentary element 120 on the wall surface of the channels 111 under vibration, in some preferred embodiments, the ratio of the maximum dimension D of the filamentary element 120 in the transverse direction perpendicular to the longitudinal direction to the hole diameter H of the channels 111 can be set in the range of 0.5-0.9, for example, 0.5, 0.6, 0.7, 0.8, 0.9. It should be noted that for the wavy filamentary element 120, the maximum dimension D of the filamentary element 120 in the transverse direction perpendicular to the longitudinal direction refers to the distance between the wave peak and wave valley parts of the filamentary element 120, as shown in Figure 3 For the helical filamentary element 120, the maximum dimension D of the filamentary element 120 in the transverse direction perpendicular to the longitudinal direction refers to the outer diameter of the helical filamentary element 120 (helical spring), as shown in Figure 4 The hole diameter H of the channels 111 can be defined conventionally. Specifically, the hole diameter H of the regular hexagonal channels 111 is defined as the distance between two opposite sides, as shown in Figure 2 The hole diameter H of the circular channels 111 is defined as the inner diameter.
[0039] Further, when the shape of the filamentous element 120 is helical (i.e. a helical filamentous element), the ratio of the helical pitch to the helical outer diameter of the filamentous element 120 can be within the range of 0.4-5.0, preferably within the range of 0.5-3.0, more preferably within the range of 0.8-1.6, such as 0.9, 1.0, 1.2, 1.4. By setting the ratio of the helical pitch to the helical outer diameter appropriately, the helical filamentous element 120 can be ensured to have proper elasticity to vibrate better under external force, achieving better cleaning effect.
[0040] In some embodiments, the external force required for the filamentous element 120 to vibrate can be generated by the gas flow passing through the channel 111 provided with the filamentous element 120. For example, during the gas treatment process, the filamentous element 120 can be pushed to vibrate by the gas to be treated passing through the channel 111, so as to achieve the effect of both flow disturbance and cleaning. For another example, after the gas treatment is completed, a special gas can be introduced to push the filamentous element 120 in the channel 111 to vibrate for cleaning. In this way, a vibration driving mechanism does not need to be specially provided, simplifying the structure of the catalyst module 100.
[0041] In other embodiments, the external force required for the filamentous element 120 to vibrate can be applied to the filamentous element 120 by an actuator. The actuator can be arranged outside the shaped catalyst 110. By applying external force to the filamentous element 120 to vibrate through the external actuator, the control is more flexible, and various vibrations of different intensities can be achieved to adapt to different cleaning requirements.
[0042] The two ends of each filamentous element 120 can be respectively fixed or connected at positions near or at the two ends of the channel 111 of the shaped catalyst 110.
[0043] In one embodiment, referring to Figure 1 As shown, the catalyst module 100 can further include a first mounting rod 131 and a second mounting rod 132. The first mounting rod 131 and the second mounting rod 132 are arranged at the two longitudinal ends of the shaped catalyst 110, respectively, and the two ends of each filamentous element 120 are respectively connected or fixed to the first mounting rod 131 and the second mounting rod 132. The number of the first mounting rod 131 and the second mounting rod 132 can be one or more, depending on the actual application requirements.
[0044] The catalyst module 100 can further comprise an actuator (not shown in the figure) as described above. The actuator is connected to at least one of the first mounting rod 131 and the second mounting rod 132, and is configured to apply acoustic vibration to the filament element 120 via the mounting rod connected thereto. When the actuator is used to apply external force, the external force can be applied during the gas treatment process to make the filament element 120 simultaneously play the roles of turbulence and cleaning, or the external force can be applied after the gas treatment process is completed to make the filament element 120 clean the wall of the channel 111.
[0045] In some embodiments, the filament element 120 can be an electric resistance wire, and is further configured to heat the shaped catalyst 110 to activate or regenerate the shaped catalyst 110 after being powered on. By such arrangement, the overall reaction efficiency is further improved, and the catalyst regeneration operation is simplified.
[0046] Preferably, a spiral electric resistance wire can be used, since the spiral electric resistance wire can be closer to the surface of the catalyst channel 111, and thus has better heating effect.
[0047] According to any one of the optional embodiments or a combination of multiple optional embodiments described above, the embodiments of the present application can achieve the following beneficial effects:
[0048] The catalyst module for gas treatment provided by the present application is arranged with a filament element in at least a part of the channels of the shaped catalyst, and the filament element is configured to form turbulence in the channel when the gas to be treated flows through the channel, so that the mass transfer between the catalyst in the channel and the gas to be treated is more sufficient, thereby improving the overall reaction efficiency.
[0049] Further, the filament element is further configured to vibrate under the action of external force to clean the wall of the channel where the filament element is located, so that dust is not easily accumulated in the channel, thereby alleviating or even solving the problem of blockage caused by dust accumulation in the channel.
[0050] Further, the filament element is an electric resistance wire, and is further configured to heat the shaped catalyst to activate or regenerate the shaped catalyst after being powered on, thereby further improving the overall reaction efficiency and simplifying the catalyst regeneration operation.
[0051] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not described in detail in order not to obscure the understanding of the present specification.
[0052] At this point, those skilled in the art will appreciate that although specific exemplary embodiments of the application have been described herein, the present application also encompasses many other variations or modifications in accordance with the principles of the application as set forth above. Accordingly, the scope of the present application should be understood to include all such variations and modifications.
Claims
1. A catalyst module for gas treatment, characterized by, The catalyst module comprises: a shaped catalyst having a plurality of channels arranged in parallel with each other, the plurality of channels extending through the shaped catalyst along a longitudinal direction of the shaped catalyst; and a plurality of filamentary elements arranged in at least a portion of the plurality of channels, one filamentary element being arranged in each of the at least a portion of the channels, each of the filamentary elements extending through the channel in which it is arranged along the longitudinal direction, and each of the filamentary elements being configured to generate a turbulent flow within the channel in which it is arranged by the filamentary element when a gas to be treated flows through the channel in which the filamentary element is arranged; wherein the catalyst module further comprises: a first mounting rod and a second mounting rod arranged at two ends of the longitudinal direction of the shaped catalyst respectively, both ends of each of the filamentary elements being connected or fixed to the first mounting rod and the second mounting rod respectively; and an actuator connected to at least one of the first mounting rod and the second mounting rod, and configured to apply a sonic vibration to the filamentary elements via the mounting rod connected thereto; wherein the filamentary elements generate a vibration along the longitudinal direction and a transverse direction perpendicular to the longitudinal direction under the sonic vibration to clean the wall surface of the channel in which the filamentary elements are arranged.
2. The catalyst module according to claim 1, wherein the filamentary elements have a wave shape or a spiral shape.
3. The catalyst module according to claim 2, wherein a ratio of a maximum dimension of the filamentary elements in the transverse direction perpendicular to the longitudinal direction to a pore diameter of the channels is 0.5-0.
9.
4. The catalyst module according to claim 2, wherein when the filamentary elements have a spiral shape, a ratio of a pitch of the filamentary elements to an outer diameter of the spiral is 0.4-5.
0.
5. The catalyst module according to claim 1, wherein the filamentary elements are electrically resistive wires, and are further configured to heat the shaped catalyst to activate or regenerate the shaped catalyst after being electrified.
6. The catalyst module according to claim 1, wherein the channels are quadrangular, hexagonal or circular channels, or channels formed by a plate catalyst.
Citation Information
Patent Citations
Efficient catalytic converter and application thereof
CN107115828A
Composite Pipe System for High Efficiency
KR102082742B1