Catalyst reactor

Abstract

The utility model provides a kind of catalyst reactor, belong to waste gas treatment field.The catalyst reactor includes shell, with containing cavity, first inlet end and first outlet end, the containing cavity with the first inlet end and first outlet end intercommunication.The box is divided into first area and second area along longitudinal direction, the first area is located above the second area, the opening rate of sieve plate in the first area is less than the opening rate of sieve plate in the second area.The utility model is by being provided with multiple box stacking layers, can disperse catalyst in different box, not only can reduce the breakage of catalyst, improve catalyst activity attenuation period, avoid the problem of local blockage, by the opening rate of sieve plate in first area in each box is set to be less than the opening rate of sieve plate in second area, even if the breakage of catalyst in box exists or does not exist, can also make that waste gas distributes uniformly.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a catalyst reactor. Background Technology

[0002] A catalyst for waste gas treatment is a material that can promote the conversion of harmful substances in waste gas into harmless or less toxic substances. Its principle is to lower the activation energy of a chemical reaction through the catalyst, thereby accelerating the reaction rate and achieving chemical reactions such as oxidation, reduction, or decomposition of the waste gas. Common catalysts include noble metals and transition metal oxides.

[0003] During the loading process, catalyst particles are loaded into the sieve plate in the reactor. Due to factors such as vibration, pressure drop increase or temperature, the catalyst particles are broken, resulting in smaller particle size and excessive pressure at the bottom of the reactor and larger particle size and lower pressure at the top of the reactor, thus causing uneven distribution of exhaust gas.

[0004] It should be noted that the information disclosed in the background section of this utility model is intended only to enhance the understanding of the general background of this utility model, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a catalyst reactor to solve the problem of uneven distribution of waste gas during treatment caused by catalyst breakage.

[0006] To solve the above technical problems, this utility model provides a catalyst reactor, comprising: The housing has a receiving cavity, a first inlet end, and a first outlet end, wherein the receiving cavity is connected to the first inlet end and the first outlet end; Multiple stacked boxes are arranged at intervals in the lateral direction to divide the receiving cavity into several independent sealed spaces. Each box has a second inlet end and a second outlet end, which are connected to the receiving cavity. A sieve plate is provided inside the box to support the catalyst. The box is divided into a first region and a second region along the longitudinal direction. The first region is located above the second region. The opening ratio of the sieve plate in the first region is less than that of the sieve plate in the second region.

[0007] Preferably, the opening ratio of the sieve plate in the first region is greater than 0 and less than or equal to 40%, and the opening ratio of the sieve plate in the second region is greater than or equal to 60%.

[0008] Preferably, the opening rate of the sieve plate in the first region is 40%, and the opening rate of the sieve plate in the second region is 60%.

[0009] Preferably, the boxes are distributed along the longitudinal direction, and adjacent boxes are detachably connected.

[0010] Preferably, along the longitudinal direction, two adjacent boxes are detachably connected by snap-fit.

[0011] Preferably, a gap of a predetermined distance is reserved between two adjacent boxes along the longitudinal direction.

[0012] Preferably, in the lateral direction, the spacing between the stacked box layers is greater than or equal to the height of the gap along the total longitudinal direction.

[0013] Preferably, a baffle is provided on the side of the box body near the gas inflow direction, and the length of the baffle in the longitudinal direction is greater than or equal to the height of the gap in the longitudinal direction.

[0014] Preferably, guide rails are provided at the bottom and top of the housing, and the guide rails are used to limit the position of the housing.

[0015] Preferably, the side of the housing that contacts the guide rail is provided with a groove, and the guide rail passes through the groove and is slidably connected to the groove.

[0016] Compared with the prior art, the catalyst reactor of this invention has the following advantages: This invention, by setting multiple stacked chambers, can disperse the catalyst in different chambers, which not only reduces catalyst breakage and improves the catalyst activity decay period, avoiding local blockage, but also reduces the cost of single replacement and facilitates maintenance even if local blockage occurs. Furthermore, by setting the opening ratio of the sieve plate in the first region of each chamber to be smaller than that in the second region, even if the catalyst in the chamber is broken or not, the exhaust gas can be evenly distributed, avoiding any impact on the catalyst's catalytic effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure in one embodiment of the present invention; Figure 2 yes Figure 1 Enlarged structural diagram at point a; Figure 3 yes Figure 1 Schematic diagram of the left-side cross-sectional structure of the middle box; Figure 4 yes Figure 1 Top view of the middle shell cross-section structure; In the picture, 100 - Housing; 110 - First inlet end; 120 - Second inlet end; 130 - Guide rail; 200 - Stacking layer of cabinets; 210 - Cabinet; 220 - Baffle; 230 - First sieve plate; 240 - Second sieve plate; 250 - Void; 260 - Second inlet end; 270 - Second outlet end; 300-catalyst. Detailed Implementation

[0018] To make the objectives, advantages, and features of this utility model clearer, the catalyst reactor proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the explanation of the embodiments of this utility model. It should be understood that the drawings do not necessarily show the specific structure of this utility model to scale, and the illustrative features used to illustrate certain principles of this utility model in the drawings are also drawn in a slightly simplified manner. Specific design features of this utility model disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and environment in which they are used. Furthermore, in the embodiments described below, the same reference numerals are sometimes used across different drawings to denote the same parts or parts having the same function, omitting repeated descriptions. In this specification, similar reference numerals and letters are used to denote similar items; therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0021] It should be noted, in particular, that in the following embodiments, the term "longitudinal" refers to the direction parallel to the height of the housing 100 (i.e., Figure 1 The direction of the middle arrow y). The term "lateral" refers to the direction parallel to 100 mm of the shell length (i.e., Figure 1 (The direction of the middle arrow x).

[0022] The core idea of ​​this invention is to provide a catalyst reactor that, even when catalyst particles are damaged, ensures that the waste gas remains evenly distributed during catalysis.

[0023] To achieve the above-mentioned goals, this invention provides a catalyst reactor, with reference to... Figures 1 to 4 This invention discloses a specific embodiment of a catalyst reactor. The catalyst reactor includes a shell 100 having a receiving cavity, a first inlet end 110, and a first outlet end 120, the receiving cavity communicating with the first inlet end 110 and the first outlet end 120. Multiple stacked chamber layers 200 are spaced laterally, dividing the receiving cavity into several independent sealed spaces. Each chamber 210 has a second inlet end 260 and a second outlet end 270 communicating with the receiving cavity. A sieve plate is disposed inside the chamber 210 to support a catalyst 300. The chamber 210 is divided longitudinally into a first region a and a second region b, the first region a being above the second region b. The porosity of the sieve plate in the first region a is less than that in the second region b.

[0024] Traditional reactors typically stack catalyst particles on the surface of a sieve plate, using a monolithic honeycomb catalyst. However, prolonged exposure to vibration, pressure drop, and temperature can cause these catalyst particles to break down. The broken catalyst particles then deposit at the bottom of the reactor, leading to catalyst activity degradation and increased pressure drop. Furthermore, there are drawbacks such as high replacement costs and the inability to maintain areas prone to blockage. Additionally, because the sieve plates at the bottom and top of the reactor have the same porosity, the resistance at the bottom is greater than at the top. This causes exhaust gas to flow through the top of the reactor, bypassing the bottom, resulting in uneven exhaust gas distribution and reduced catalytic efficiency.

[0025] However, in this embodiment, by setting multiple stacked chamber layers 200, the catalyst can be dispersed in different chambers 210, which not only reduces catalyst breakage and improves the catalyst activity decay cycle, but also avoids the problem of local blockage. Furthermore, the cost of a single replacement is low, and maintenance is convenient even if local blockage occurs. In addition, by setting the opening ratio of the sieve plate in the first region a of each chamber 210 to be less than that of the sieve plate in the second region b, even if the catalyst in the chamber 210 is broken, the exhaust gas can be evenly distributed, avoiding any impact on the catalyst's catalytic effect.

[0026] The shell 100 can be a cuboid, cube, or other similar structure; specific requirements are not detailed here. The shell 100 can be made of stainless steel to improve its strength and extend its service life. The shell 100 includes a receiving cavity, a first inlet end 110, and a first outlet end 120. Exhaust gas enters the receiving cavity from the first inlet end 110, is treated, and then exits from the first outlet end 120. Specifically, depending on the position of the stacked layers 200, the exhaust gas can flow laterally or longitudinally. Figure 1 Taking one embodiment as an example, the exhaust gas flows in the horizontal direction.

[0027] Multiple box-type stacked layers 200 are distributed laterally at intervals, dividing the receiving cavity into several independent sealed spaces. Each box-type stacked layer 200 includes multiple boxes 210, such as two or more. Multiple boxes 210 are stacked together longitudinally to form the box-type stacked layer 200. The shape of the boxes 210 can be cuboid, cube, etc., without specific requirements. To match the shape of the shell 100, the boxes 210 adopt the same structural configuration as the shell 100; for example, both the shell 100 and the boxes 210 can be cuboid structures. The dimensions of the boxes 210 can be 300*300*150mm, 500*500*350mm, etc. The boxes 210 can be made of 310S stainless steel and manufactured using laser welding. It should be noted that there are no specific requirements for the material, size, and shape of the boxes 210; they can be set according to actual production requirements.

[0028] A certain gap is set between two adjacent stacked boxes 200 in the lateral direction, and the distance of the gap is as follows: Figure 1 The aforementioned d1 is to prevent the housing 210 from cracking due to thermal expansion and contraction. ANSYS simulation verification shows that for the housing 210 made of 310S stainless steel, a 2mm expansion gap is sufficient to meet the requirements of 500℃ operating conditions. Since the temperature during catalytic treatment of waste gas is less than or equal to 300℃, the interval between two adjacent stacked layers 200 of the housing in the transverse direction should be greater than or equal to 2mm, that is, d1 should be greater than or equal to 2mm.

[0029] A second inlet end 260 is provided at the bottom near one side of the housing 210, and a second outlet end 270 is provided at the top near the other side of the housing 210. Exhaust gas enters the housing 210 through the second inlet end 260, undergoes catalytic oxidation treatment by the catalyst, and is discharged from the second outlet end 270. The housing 210 includes a first region a and a second region b along the longitudinal direction. The first region a is located above the second region b. Both the first region a and the second region b are provided with sieve plates. The sieve plate in the first region a is designated as the first sieve plate 230. The sieve plate in the second region b is designated as the second sieve plate 240. Catalysts are stacked on the surfaces of both the first sieve plate 230 and the second sieve plate 240. It should be noted that one, two, or more first sieve plates 230 can be provided in the first region a. Similarly, one, two, or more second sieve plates 240 can be provided in the second region b. The number of sieves in the first region 230 and the second region 240 is not specifically required. The opening ratio of the first sieve 230 is less than that of the second sieve 240. By setting up a double-layer gradient pore size equalization system, when the catalyst breaks down and falls into the second region b, it can prevent more gas from passing through the first region a than the second region b, thus enabling uniform gas distribution. The opening ratio of the sieves in the first region a is greater than 0 and less than or equal to 40%, and the opening ratio of the sieves in the second region b is greater than or equal to 60%. That is, the opening ratio of the first sieve 230 can be 40%, 30%, 20%, etc. The opening ratio of the second sieve 240 can be 60%, 70%, 80%, etc. Since the amount of broken catalyst in a single box 210 is less than that in a traditional integral honeycomb distribution catalyst, to ensure catalytic efficiency, it is preferable that the opening ratio of the first sieve 230 is 40% and the opening ratio of the second sieve 240 is 60%.

[0030] In addition, it should be noted that even if the catalyst inside the chamber 210 is not broken, the large number of chambers 210 can still ensure uniform gas distribution.

[0031] For example, the boxes 210 are distributed along the longitudinal direction, and adjacent boxes 210 are detachably connected.

[0032] Specifically, refer to Figure 1 As shown, along the longitudinal direction, two adjacent housings 210 are detachably connected by clips, such as spring clips. Matching spring clips are installed at the four corners of housing 210, and the material of the spring clips can withstand a high temperature of 800℃ and has a lifespan of greater than or equal to 500 disassembly and assembly cycles. By detachably connecting the longitudinally distributed housings 210 with clips, not only is catalyst loading and replacement convenient, reducing catalyst replacement costs, but maintenance of locally blocked areas of the catalyst is also facilitated.

[0033] For example, along the longitudinal direction, a gap 250 with a predetermined distance is reserved between two adjacent boxes 210.

[0034] Specifically, refer to Figure 1 and Figure 2 As shown, a predetermined gap 250 is reserved between two adjacent housings 200 in the longitudinal direction. That is, the predetermined distance d2 between two longitudinally distributed housings 210 is greater than or equal to 2mm. During the actual installation of the housings 210, the distance d2 between the two housings 210 can be adjusted by changing the position or size of the clips. By reserving a predetermined distance between the two longitudinally distributed housings 210, the possibility of the housings 210 bursting due to thermal expansion and contraction can be avoided. ANSYS simulation verification shows that for housings 210 made of 310S stainless steel, a 2mm expansion gap is sufficient to meet the requirements of 500℃ operating conditions. Since the temperature during catalytic treatment of waste gas is less than or equal to 300℃, the interval between two adjacent stacked housing layers 200 in the transverse direction is greater than or equal to 2mm. That is, d2 is greater than or equal to 2mm.

[0035] For example, a baffle 220 is provided on the side of the box body near the gas inflow direction, and the length of the baffle 220 in the longitudinal direction is greater than or equal to the height of the gap 250 in the longitudinal direction.

[0036] Specifically, refer to Figures 1 to 3 As shown, a baffle 220 is provided on the side of the housing 210 near the gas inflow. The length of the baffle 220 in the longitudinal direction is greater than or equal to the height of the gap 250 in the longitudinal direction. By providing the baffle 220, the reserved gap 250 can be sealed, preventing gas from passing through the gap 250.

[0037] For example, guide rails 130 are provided at the bottom and top of the housing 100, and the guide rails 130 are used to limit the housing 210.

[0038] Specifically, refer to Figure 1 As shown, to facilitate the installation of the enclosure 210 and to limit its movement, preventing tilting or uneven stacking of the enclosures 210, guide rails 130 are provided at the top and bottom of the inner wall of the enclosure 210. The guide rails 130 can be rod-shaped or plate-shaped. The enclosure 210 is slidably connected to the guide rails 130. A groove is provided on the side of the enclosure 210 that contacts the guide rail 130. The guide rail 130 passes through the groove and is slidably connected to it. This effectively limits the movement of the enclosure 210.

[0039] In summary, the above embodiments have provided detailed descriptions of different configurations of the catalyst reactor. Of course, the above descriptions are only descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention in any way. The present invention includes, but is not limited to, the configurations listed in the above embodiments. Those skilled in the art can draw inferences from the above embodiments. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A catalyst reactor, characterized in that, include: The housing has a receiving cavity, a first inlet end, and a first outlet end, wherein the receiving cavity is connected to the first inlet end and the first outlet end; Multiple stacked boxes are arranged at intervals in the lateral direction to divide the receiving cavity into several independent sealed spaces. Each box has a second inlet end and a second outlet end, which are connected to the receiving cavity. A sieve plate is provided inside the box to support the catalyst. The box is divided into a first region and a second region along the longitudinal direction. The first region is located above the second region. The opening ratio of the sieve plate in the first region is less than that of the sieve plate in the second region.

2. The catalyst reactor according to claim 1, characterized in that, The opening rate of the sieve plate in the first region is greater than 0 and less than or equal to 40%, and the opening rate of the sieve plate in the second region is greater than or equal to 60%.

3. The catalyst reactor according to claim 1, characterized in that, The opening rate of the sieve plate in the first region is 40%, and the opening rate of the sieve plate in the second region is 60%.

4. The catalyst reactor according to claim 1, characterized in that, The boxes are distributed along the longitudinal direction, and adjacent boxes can be detachably connected.

5. The catalyst reactor according to claim 4, characterized in that, Along the longitudinal direction, two adjacent boxes can be detachably connected by snap-fit.

6. The catalyst reactor according to claim 1, characterized in that, Along the longitudinal direction, a predetermined gap is reserved between two adjacent boxes.

7. The catalyst reactor according to claim 6, characterized in that, In the lateral direction, the spacing between the stacked box layers is greater than or equal to the height of the gap along the total longitudinal direction.

8. The catalyst reactor according to claim 6, characterized in that, A baffle is provided on the side of the box body near the gas inflow direction, and the length of the baffle in the longitudinal direction is greater than or equal to the height of the gap in the longitudinal direction.

9. The catalyst reactor according to claim 1, characterized in that, The bottom and top of the housing are provided with guide rails, which are used to limit the position of the housing.

10. The catalyst reactor according to claim 9, characterized in that, The side of the housing that contacts the guide rail is provided with a sliding groove, and the guide rail passes through the sliding groove and is slidably connected to the sliding groove.

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