Pilot-scale reactor capable of being disassembled and assembled in segmented mode
By using a segmented, detachable pilot-scale reactor structure and heating wires, the problems of uneven catalyst density and large temperature difference were solved, enabling visual inspection and temperature uniformity during the catalyst loading process, and improving heat and mass transfer efficiency.
Patent Information
- Application Number
- CN202511381879.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2025-11-04
AI Technical Summary
Existing pilot-scale small fixed-bed reactors cannot visually inspect the catalyst loading, resulting in uneven catalyst density, channeling or deviating flow, difficulty in temperature control, large temperature differences, low heat and mass transfer efficiency, and affecting experimental results.
Design a segmented, detachable pilot-scale reactor. Through the detachable cylindrical structure and temperature measuring mechanism, visual inspection and manual leveling of the catalyst loading process can be achieved. Electric heating wire is used to reduce temperature difference and improve temperature uniformity.
This enables full visual inspection and manual leveling of the catalyst loading process, reducing temperature differences, improving temperature uniformity inside the reactor, and enhancing heat and mass transfer efficiency.
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Figure CN120885140A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of reactor technology, in particular to a segmented detachable pilot reactor. BACKGROUND
[0002] For the 20L Fischer-Tropsch wax deep processing hydrogenation catalyst pilot test, the reactor equipment has small volume, less catalyst loading (<20L), equipment height <3m, diameter <15cm, no operable manhole (personnel cannot enter operation), the reactor only has catalyst flow inlet (<10cm) and flow outlet in the upper and bottom parts of the small fixed bed reactor in the pilot test The small fixed bed hydrogenation reactor in the pilot test field is a device with the structure of cylinder and head welding as a whole, which cannot be visually inspected, manually spread or compacted, flexibly set the height of the internal part, and the position of the thermocouple when loading the catalyst. In the actual loading of the catalyst in our pilot device reactor, the catalyst forms a catalyst pile after falling, which makes the middle density of the catalyst pile large and the gap small, the surrounding density of the catalyst pile low and the gap large, and it is easy to form channeling or bias flow; after feeding and heating, the middle temperature of the lower bed layer of the catalyst is high, and the upper bed layer and the reactor close to the inner wall are lower, and the temperature difference between the upper and lower bed layers reaches 35-50℃ when the temperature is normally controlled, which is difficult to achieve the expected isothermal reaction. In addition, the temperature measuring probe of the catalyst bed of the reactor is installed in the hollow metal tube at the center of the reactor, and the tube is always filled with gas, which has large heat transfer resistance, and there are great defects in accurate temperature measurement and timely feedback, which greatly affects the mass and heat transfer, and greatly reduces the test effect. Therefore, we propose a segmented detachable pilot reactor to solve the above problems. SUMMARY
[0003] (I) Technical problems solved In view of the deficiencies of the prior art, the present application provides a segmented detachable pilot reactor, which solves the problems proposed in the above background.
[0004] (II) Technical solutions In order to achieve the above purpose, the present application specifically adopts the following technical solutions: The utility model provides a sectional detachable pilot plant reactor, including lower cylinder, the upper and lower sides of lower cylinder are open structure, the lower surface of lower cylinder is fixedly installed with discharge pipe, the outer surface of lower cylinder is fixedly installed with first heating mechanism, the upper surface of lower cylinder is installed with middle cylinder through first connecting mechanism, and the upper and lower sides of middle cylinder are open structure, the outer surface of middle cylinder is fixedly installed with second heating mechanism, the upper surface of second middle cylinder is installed with upper cylinder through second connecting mechanism, and the lower surface of upper cylinder is open structure, the right side wall of upper cylinder is fixedly installed with feeding pipe, the upper side wall of upper cylinder is installed with temperature measuring mechanism, and temperature measuring mechanism sets up in lower cylinder and middle cylinder, first heating mechanism, second heating mechanism and temperature measuring mechanism all are connected with controller electrically.
[0005] Further, the first heating mechanism includes a heat preservation jacket, an electric heating wire, a first temperature sensing probe, and a first terminal, the heat preservation jacket is fixedly installed on the outer surface of the lower cylinder, the electric heating wire is wound on the corresponding outer surface of the lower cylinder, the first temperature sensing probe and the first terminal are fixedly installed on the side wall of the heat preservation jacket, and the first temperature sensing probe is attached to the outer surface of the lower cylinder.
[0006] Further, the second heating mechanism is the same structure as the first heating mechanism, and the second heating mechanism is connected with the first heating mechanism through the first terminal.
[0007] Further, the first connecting mechanism includes a flange, a rubber sealing ring, and a fastening bolt assembly, the flanges are fixedly installed on the upper surfaces of the lower cylinder and the middle cylinder respectively, the rubber sealing ring is installed between the upper and lower flanges, and the flanges are locked and fixed through the fastening bolt assembly.
[0008] Further, the second connecting mechanism is the same structure as the first connecting mechanism.
[0009] Further, the temperature measuring mechanism includes a first sleeve, a plug, a second terminal, a second sleeve, a third sleeve, a branch pipe, and a second temperature sensing probe, the first sleeve is fixedly installed on the upper side wall of the upper cylinder, the plug is installed on the upper surface of the first sleeve, the second terminal is embedded in the plug, the second sleeve is inserted into the lower surface of the first sleeve, the third sleeve is inserted into the lower surface of the second sleeve, the outer surfaces of the second sleeve and the third sleeve are both cross-shaped and arranged in the branch pipe, and the second temperature sensing probe is arranged on the branch pipe.
[0010] Further, the second sleeve is arranged in the middle cylinder, and the third sleeve is arranged in the lower cylinder.
[0011] (Three) beneficial effects Compared with the prior art, the application provides a segmented detachable pilot reactor, which has the following beneficial effects: The application realizes the disassembly and assembly of the lower cylinder, the middle cylinder and the upper cylinder through the first connecting mechanism and the second connecting mechanism, realizes visual inspection, manual flattening or compaction during the whole catalyst loading process, and realizes the flexible setting of the inner part. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a schematic diagram of the front view structure of the application. Figure 2 It is a schematic diagram of the cross-sectional structure of the application. Figure 3 It is a schematic diagram of the cross-sectional structure of the temperature measuring mechanism of the application.
[0013] In the figure: 1, lower cylinder; 2, discharge pipe; 3, first heating mechanism; 301, heat preservation jacket; 302, electric heating wire; 303, first temperature sensing probe; 304, first terminal; 4, first connecting mechanism; 401, flange; 402, rubber sealing ring; 403, fastening bolt assembly; 5, middle cylinder; 6, second heating mechanism; 7, second connecting mechanism; 8, upper cylinder; 9, feeding pipe; 10, temperature measuring mechanism; 101, first sleeve; 102, plug; 103, second terminal; 104, second sleeve; 105, third sleeve; 106, branch pipe; 107, second temperature sensing probe; 11, controller. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application. EMBODIMENT
[0015] As Figures 1-3As shown, one embodiment of the present application proposes a segmented detachable pilot reactor, which comprises a lower cylinder 1, the upper and lower sides of the lower cylinder 1 are open structures, the lower surface of the lower cylinder 1 is fixedly installed with a discharge pipe 2, the outer surface of the lower cylinder 1 is fixedly installed with a first heating mechanism 3, the upper surface of the lower cylinder 1 is installed with a middle cylinder 5 through a first connecting mechanism 4, and the upper and lower sides of the middle cylinder 5 are open structures, the outer surface of the middle cylinder 5 is fixedly installed with a second heating mechanism 6, the upper surface of the second middle cylinder 5 is installed with an upper cylinder 8 through a second connecting mechanism 7, and the lower surface of the upper cylinder 8 is an open structure, the right side wall of the upper cylinder 8 is fixedly installed with a feeding pipe 9, the upper side wall of the upper cylinder 8 is installed with a temperature measuring mechanism 10, and the temperature measuring mechanism 10 is arranged in the lower cylinder 1 and the middle cylinder 5, and the first heating mechanism 3, the second heating mechanism 6 and the temperature measuring mechanism 10 are electrically connected with a controller 11.
[0016] As shown in the drawings, Figure 2 In some embodiments, the first heating mechanism 3 comprises a heat preservation jacket 301, an electric heating wire 302, a first temperature sensing probe 303 and a first terminal 304, the heat preservation jacket 301 is fixedly installed on the outer surface of the lower cylinder 1, the electric heating wire 302 is wound on the corresponding outer surface of the lower cylinder 1, the first temperature sensing probe 303 and the first terminal 304 are fixedly installed on the side wall of the heat preservation jacket 301, and the first temperature sensing probe 303 is attached to the outer surface of the lower cylinder 1.
[0017] In this embodiment, the first temperature sensing probe 303 detects the temperature of the side wall of the lower cylinder 1 and feeds back information to the controller 11, and the controller 11 controls the electric heating wire 302 to heat the lower cylinder 1 according to the temperature of the temperature measuring mechanism 10, so as to achieve the effect of heat preservation of the reactor and reduce the temperature difference of the reactor.
[0018] As shown in the drawings, Figure 2 In some embodiments, the second heating mechanism 6 is the same structure as the first heating mechanism 3, and the second heating mechanism 6 is connected with the first heating mechanism 3 through the first terminal 304.
[0019] In this embodiment, the second heating mechanism 6 can heat the middle cylinder 5.
[0020] As shown in the drawings, Figure 2 In some embodiments, the first connecting mechanism 4 comprises a flange 401, a rubber sealing ring 402 and a fastening bolt assembly 403, the flanges 401 are fixedly installed on the upper surfaces of the lower cylinder 1 and the middle cylinder 5 respectively, the rubber sealing ring 402 is installed between the upper and lower flanges 401, and the flanges 401 are locked and fixed through the fastening bolt assembly 403.
[0021] In the embodiment, the upper and lower flanges 401 are connected and fixed by the fastening bolt assembly 403, so that the lower cylinder 1 and the middle cylinder 5 are connected and fixed, thereby enabling the upper and lower flanges 401 to be disassembled, that is, enabling the lower cylinder 1 and the middle cylinder 5 to be disassembled, and the rubber sealing ring 402 enables the upper and lower flanges 401 to have better sealing effect.
[0022] As shown in Figure 2 some embodiments, the second connecting mechanism 7 has the same structure as the first connecting mechanism 4.
[0023] In the embodiment, the second connecting mechanism 7 enables the middle cylinder 5 and the upper cylinder 8 to be disassembled.
[0024] As shown in Figure 2 and Figure 3 some embodiments, the temperature measuring mechanism 10 includes a first sleeve 101, a plug 102, a second terminal 103, a second sleeve 104, a third sleeve 105, a branch pipe 106, and a second temperature sensing probe 107, the first sleeve 101 is fixedly installed on the upper side wall of the upper cylinder 8, the upper surface of the first sleeve 101 is installed with the plug 102, the plug 102 is embedded with the second terminal 103, the lower surface of the first sleeve 101 is inserted with the second sleeve 104, the lower surface of the second sleeve 104 is inserted with the third sleeve 105, the outer surfaces of the second sleeve 104 and the third sleeve 105 are both cross-shapedly arranged with the branch pipe 106, and the branch pipe 106 is provided with the second temperature sensing probe 107.
[0025] In the embodiment, according to the designed bed height of the catalyst loading, the second temperature sensing probe 107 corresponding to the bed inlet and outlet position is clamp-welded and installed at the symmetrical position of the metal pipe perpendicular to the reactor axial direction, the second temperature sensing probe 107 is pre-manufactured and embedded in the clamp, when the lower cylinder 1, the middle cylinder 5, and the upper cylinder 8 are docked, the corresponding first sleeve 101, second sleeve 104, and third sleeve 105 are docked, and the second temperature sensing probe 107 on the branch pipe 106 can directly detect the temperature of the materials in the lower cylinder 1 and the middle cylinder 5.
[0026] As shown in Figure 2 some embodiments, the second sleeve 104 is arranged in the middle cylinder 5, and the third sleeve 105 is arranged in the lower cylinder 1.
[0027] In the embodiment, the second temperature sensing probe 107 in the branch pipe 106 on the second sleeve 104 and the third sleeve 105 can respectively sense the temperature of the materials in the lower cylinder 1 and the middle cylinder 5.
[0028] In use, the filler, catalyst is filled from the bottom to the top, the proppant and catalyst is filled from the lower cylinder 1, the accurate height and filling amount is calibrated according to the design technical parameters, the filling material of each layer is visually inspected during the filling process whether it is flat, whether it is spread, whether the particle size is uniform, whether the abnormal filler or impurities is mixed, etc., whether the inner part is correctly placed and adjusted to the temperature measuring height corresponding to the catalyst bed, etc., the third sleeve 105 is fixedly installed on the inner part, after the filling is completed, the lower cylinder 1 and the middle cylinder 5 are connected and fixed by the upper and lower flanges 401 in the first connecting mechanism 4 through the fastening bolt assembly 403, the proppant and catalyst is filled in the middle cylinder 5 in the same way, the accurate height and filling amount is calibrated according to the design technical parameters, and the second sleeve 104 is installed, the second sleeve 104 and the second temperature sensing probe 107 in the third sleeve 105 are electrically connected, after the filling is completed, the middle cylinder 5 and the upper cylinder 8 are connected and fixed through the second connecting mechanism 7, and the second temperature sensing probe 107 of the second sleeve 104 is electrically connected with the lower end of the second terminal 103, the purpose of visually inspecting, manually spreading or compacting the catalyst filling process and flexibly setting the inner part is realized, and the second temperature sensing probe 107 in the temperature measuring mechanism 10 is pre-manufactured and buried in the jacket, when the lower cylinder 1, the middle cylinder 5 and the upper cylinder 8 are connected, the first sleeve 101, the second sleeve 104 and the third sleeve 105 are connected in the upper and lower direction, the second temperature sensing probe 107 on the branch pipe 106 can directly detect the temperature of the material in the lower cylinder 1 and the middle cylinder 5, the material reaction temperature is balanced, the first heating mechanism 3 and the second heating mechanism 6 detect the temperature of the side wall of the lower cylinder 1 through the first temperature sensing probe 303, and the information is fed back to the controller 11, the controller 11 controls the electric heating wire 302 to open to heat the lower cylinder 1 and the middle cylinder 5 according to the temperature of the temperature measuring mechanism 10, so that the reactor is heat-insulated, and the temperature difference of the reactor is reduced.
[0029] In summary, the segmented detachable pilot reactor realizes the purpose of visually inspecting, manually spreading or compacting the catalyst filling process and flexibly setting the inner part, realizes the way of directly contacting the temperature measuring and reaction material, the material reaction temperature is balanced, and the electric heating wire 302 is used as the reactor heat preservation mode.
[0030] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A segmented, detachable pilot-scale reactor, comprising a lower cylinder (1), characterized in that: The lower cylinder (1) has an open structure on both the upper and lower sides. A discharge pipe (2) is fixedly installed on the lower surface of the lower cylinder (1). A first heating mechanism (3) is fixedly installed on the outer surface of the lower cylinder (1). A middle cylinder (5) is installed on the upper surface of the lower cylinder (1) through a first connecting mechanism (4). The upper and lower sides of the middle cylinder (5) have an open structure. A second heating mechanism (6) is fixedly installed on the outer surface of the middle cylinder (5). An upper cylinder (8) is installed on the upper surface of the second middle cylinder (5) through a second connecting mechanism (7). The lower surface of the upper cylinder (8) has an open structure. A feed pipe (9) is fixedly installed on the right side wall of the upper cylinder (8). A temperature measuring mechanism (10) is installed on the upper side wall of the upper cylinder (8). The temperature measuring mechanism (10) is located inside the lower cylinder (1) and the middle cylinder (5). The first heating mechanism (3), the second heating mechanism (6), and the temperature measuring mechanism (10) are all electrically connected to the controller (11).
2. The segmented, detachable pilot-scale reactor according to claim 1, characterized in that: The first heating mechanism (3) includes a heat insulation jacket (301), a heating wire (302), a first temperature sensor (303), and a first connector (304). The heat insulation jacket (301) is fixedly installed on the outer surface of the lower cylinder (1). The heating wire (302) is wound on the outer surface of the lower cylinder (1) corresponding to the heat insulation jacket (301). The first temperature sensor (303) and the first connector (304) are fixedly installed on the side wall of the heat insulation jacket (301), and the first temperature sensor (303) is in contact with the outer surface of the lower cylinder (1).
3. The segmented, detachable pilot-scale reactor according to claim 1, characterized in that: The second heating mechanism (6) has the same structure as the first heating mechanism (3), and the second heating mechanism (6) and the first heating mechanism (3) are connected by the first terminal (304).
4. A segmented, detachable pilot-scale reactor according to claim 1, characterized in that: The first connecting mechanism (4) includes a flange (401), a rubber sealing ring (402), and a fastening bolt assembly (403). The flange (401) is fixedly installed on the upper surface of the lower cylinder (1) and the upper surface of the middle cylinder (5), and a rubber sealing ring (402) is installed between the upper and lower flanges (401). The flanges (401) are locked and fixed together by the fastening bolt assembly (403).
5. A segmented, detachable pilot-scale reactor according to claim 1, characterized in that: The second connecting mechanism (7) has the same structure as the first connecting mechanism (4).
6. A segmented, detachable pilot-scale reactor according to claim 1, characterized in that: The temperature measuring mechanism (10) includes a first sleeve (101), a plug (102), a second connector (103), a second sleeve (104), a third sleeve (105), a branch pipe (106), and a second temperature probe (107). The first sleeve (101) is fixedly installed on the upper side wall of the upper cylinder (8). The plug (102) is installed on the upper surface of the first sleeve (101), and the second connector (103) is embedded in the plug (102). The second sleeve (104) is inserted into the lower surface of the first sleeve (101), and the third sleeve (105) is inserted into the lower surface of the second sleeve (104). The outer surfaces of the second sleeve (104) and the third sleeve (105) are arranged in a cross shape on the branch pipe (106), and the branch pipe (106) is provided with a second temperature probe (107).
7. A segmented, detachable pilot-scale reactor according to claim 6, characterized in that: The second sleeve (104) is installed inside the middle cylinder (5), and the third sleeve (105) is installed inside the lower cylinder (1).