Multi-tube fixed bed reactor

Abstract

The invention discloses a multi-tube fixed bed reactor which comprises a main outer shell and a temperature measuring opening formed in the left side of the main outer shell. An upper cover body and a lower cover body are connected to the upper portion and the lower portion of the main outer shell correspondingly. A lower fixing disc and an upper fixing disc are attached to the interior of the main outer shell in a sliding connection mode, and the upper portion of the lower fixing disc is connected with the upper fixing disc through a circle of connecting rods; the outer side of the lower portion of the catalyst containing pipe and the lower fixing disc form a detachable installation structure through a clamping assembly. A flow guide frame and a material flow dividing disc are installed in the upper cover body from top to bottom through a support, and a temperature control pipe is rotationally installed in the middle of the flow guide frame and the material flow dividing disc in a penetrating mode. According to the multi-tube fixed bed reactor, a catalyst in the catalyst placing tube can be pushed out through cooperation of the upper baffle and the lower baffle, so that the catalyst in the catalyst placing tube can be conveniently replaced, and the operation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of fixed bed reactors, in particular to a multi-tubular fixed bed reactor. Background Art

[0002] Fixed bed reactor is a chemical reactor widely used in chemical industry, petroleum and environmental protection. The material to be treated reacts with the fixed bed formed by the immobile solid material in the fixed bed reactor to perform chemical reaction on the material to be treated. Due to the different internal structure settings, the types of fixed bed reactors are diversified, and the multi-tubular fixed bed reactor is one of them.

[0003] The patent name disclosed in the prior art with the announcement number "CN113617297B" is "A tube-type fixed bed reactor for MIBK production", which discloses that the conduits are provided in plurality and are evenly distributed on the inner side of the reactor, the shape of the reactor is cylindrical, the rotating assembly is located on the outer side of the conduit, and the conduit can be rotated by the driving assembly, so that the raw materials and the catalyst on the inner side of the conduit are convenient to contact and use; a heat dissipation device is provided on the outer side of the conduit, and the water-cooled heat dissipation device can effectively take away the heat on the inner side of the conduit and reduce the temperature of the conduit. The air-cooled heat dissipation device can effectively reduce the temperature on the inner side of the reactor and can perform heat dissipation operation on the designated position on the conduit, effectively improving the heat dissipation effect of the reactor.

[0004] After the multi-tubular fixed bed reactor in the prior art is used for a period of time, when the catalyst inside is deactivated, since the catalyst is fixed in the conduit, the operation process is complicated, time-consuming and labor-intensive when replacing the catalyst in the conduit, which in turn affects the use of the fixed bed reactor;

[0005] Therefore, we proposed a multi-tubular fixed bed reactor to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a multi-tubular fixed bed reactor to solve the problem mentioned in the background art that the multi-tubular fixed bed reactor currently on the market is not convenient for replacing the catalyst, which in turn affects the use of the fixed bed reactor.

[0007] To achieve the above object, the present invention provides the following technical solution: a multi-tubular fixed bed reactor, comprising a main outer shell, and a temperature measuring port installed on the left side of the main outer shell;

[0008] The upper and lower parts of the main outer shell are respectively connected with an upper cover body and a lower cover body;

[0009] The main outer shell is slidably connected to a lower fixing plate and an upper fixing plate, and the upper part of the lower fixing plate is connected to the upper fixing plate via a circle of connecting rods;

[0010] A circle of catalyst placement tubes arranged at equal intervals are inserted through the interior of the lower fixed plate and the upper fixed plate, and the lower outer sides of the catalyst placement tubes form a disassembly and installation structure with the lower fixed plate through a clamping assembly;

[0011] A flow guide frame and a material flow diversion plate are installed from top to bottom inside the upper cover body through a bracket, and a temperature control tube is rotatably installed through the middle of the flow guide frame and the material flow diversion plate.

[0012] Preferably, sliders are installed alternately on the outer sides of the lower fixed plate and the upper fixed plate, and the outer sides of the lower fixed plate and the upper fixed plate are slidably connected to the sliding grooves provided on the inner side wall of the main housing through the sliders.

[0013] Preferably, the clamping assembly includes two disassembly blocks symmetrically mounted on the outer side below the catalyst placement tube;

[0014] The lower fixed plate and the upper fixed plate are both provided with a circle of through holes and first slots arranged at equal intervals, the number of through holes and the number of first slots are arranged in a ratio of 1:2, and the first slots are arranged on the outer sides of the through holes;

[0015] The lower part of the first card slot in the lower fixed plate is solid, and the lower part of the first card slot in the upper fixed plate is open;

[0016] A circle of arc-shaped second card slots arranged at equal intervals is provided inside the lower fixed plate, and the spaces within the first card slot, the second card slot and the through hole in the lower fixed plate are connected;

[0017] A disassembly block is provided in the first slot in the lower fixed plate. The height of the first slot in the lower fixed plate is greater than that of the second slot. The height of the second slot is greater than that of the disassembly block. The disassembly block can be rotated from the first slot in the lower fixed plate to the second slot.

[0018] Preferably, a connecting ring is threadedly connected to the upper outer side of the catalyst placement tube, a fixing piece with a "T"-shaped structure is installed above the connecting ring, and an upper baffle and a lower baffle are installed on the outer side of the part of the fixing piece inserted into the catalyst placement tube from top to bottom, and the upper baffle and the lower baffle are mesh structures, and the outer sides of the upper baffle and the lower baffle are arranged to fit the inner wall of the catalyst placement tube.

[0019] Preferably, side scrapers are installed at equal intervals between the upper baffle and the lower baffle, the outer side of the side scraper is in contact with the inner wall of the catalyst placement tube, and the arc length of the side scraper is less than one twelfth of the inner diameter of the catalyst placement tube.

[0020] Preferably, the middle interior of the lower fixed plate and the upper fixed plate is hollow, and a temperature control tube is inserted into the middle interior of the lower fixed plate and the upper fixed plate;

[0021] A feed pipe is fixedly inserted into the upper interior of the upper cover body, the lower end of the feed pipe is rotatably connected to the upper interior of the temperature control tube, and a rectangular connecting column is installed below the temperature control tube;

[0022] A connecting shaft is passed through the interior of the lower cover body and installed through a sealed bearing. The upper part of the connecting shaft is concave-convexly matched with the connecting column. A discharge pipe is passed through and fixed on the right side of the lower cover body.

[0023] Preferably, a temporary material storage cavity is provided inside the upper part of the temperature control tube, a circle of diversion channels are provided at equal intervals inside the upper part of the temperature control tube, and a diversion channel is provided outside the lower part of the temporary material storage cavity;

[0024] The lower end of the feed pipe is inserted into the material temporary storage cavity;

[0025] The bottom surface of the material diverter plate is provided with diverter holes at equal intervals, and a catalyst placement tube is provided correspondingly below the diverter holes;

[0026] The space in the material diversion plate is connected with the space in the material temporary storage cavity through the diversion channel.

[0027] Preferably, a temperature control chamber is opened inside the lower part of the temperature control tube, and the temperature control chamber is arranged below the diversion channel. A collecting channel with a "7"-shaped structure is opened inside the upper part of the temperature control tube. The collecting channel and the diversion channel are staggered, and the lower end of the collecting channel is connected to the interior of the temperature control chamber.

[0028] Preferably, a heat transfer medium flow pipe is installed on the outer side of the guide frame, the right end of the heat transfer medium flow pipe passes through the right side surface of the upper cover body, and the upper end of the collecting channel is connected to the interior of the guide frame.

[0029] Preferably, a discharge pipe is fixedly passed through the interior of one of the collecting channels, the lower end of the discharge pipe is inserted into the temperature control cavity, and the upper end of the discharge pipe is inserted into the guide frame.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: the upper baffle and the lower baffle of the multi-tube fixed bed reactor can cooperate to push out the catalyst in the catalyst placement tube, thereby facilitating the replacement of the catalyst in the catalyst placement tube and convenient operation. The specific contents are as follows:

[0031] (1) By manually rotating the catalyst placement tube, the catalyst placement tube can be separated from the lower fixed plate, which is convenient for removing the catalyst placement tube from the main outer shell. Then, by manually rotating and pulling the fixing piece upward, the fixing piece can drive the upper baffle plate and the lower baffle plate to move upward, so that the upper baffle plate and the lower baffle plate can cooperate to push out the catalyst in the catalyst placement tube, thereby facilitating the replacement of the catalyst in the catalyst placement tube, and the operation is convenient;

[0032] Furthermore, when the fixing part rotates, the side scraper is driven to rotate, so that the side scraper can scrape off the catalyst adhering to the inner wall of the catalyst placement tube, thereby making the catalyst discharge more thorough and facilitating the replacement of the catalyst in the later stage;

[0033] (2) The coordinated use of the feed pipe, material temporary storage chamber, diversion channel and material diversion plate not only facilitates the diversion and discharge of the material to be processed, so that the material to be processed can evenly enter the multiple catalyst placement tubes below, but also will not affect the rotation of the subsequent temperature control tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the internal structure of the main outer shell of the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of the lower fixed plate of the present invention when viewed from above;

[0037] Figure 4 This is a schematic diagram of the separation structure of the lower fixing plate and the temperature control tube of the present invention;

[0038] Figure 5 This is a schematic diagram of the separation structure of the lower fixed plate and the catalyst placement tube of the present invention;

[0039] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the connection between the lower fixing plate and the catalyst placement tube of the present invention;

[0040] Figure 7 This is a schematic cross-sectional view of the main structure of the catalyst placement tube of the present invention;

[0041] Figure 8 This is a schematic diagram of the top cross-sectional structure of the catalyst placement tube of the present invention;

[0042] Fig. 9 This is a schematic diagram of the structure of the temperature control tube of the present invention when viewed from above;

[0043] Fig.10 This is a cross-sectional structural diagram of the connection between the flow guide frame and the temperature control tube of the present invention;

[0044] Fig.11 This is a schematic diagram of the cross-sectional structure of the diversion channel of the present invention;

[0045] Fig.12 It is a schematic diagram of the cross-sectional structure of the collecting channel of the present invention.

[0046] In the figure: 1. main outer shell; 101. temperature measuring port; 2. upper cover; 201. feed pipe; 202. heat transfer medium flow pipe; 3. lower cover; 301. connecting shaft; 302. discharge pipe; 4. lower fixed plate; 41. first slot; 42. second slot; 43. through hole; 5. connecting rod; 6. upper fixed plate; 7. catalyst placement tube; 71. disassembly block; 8. temperature control tube; 81. material temporary storage chamber; 82. temperature control chamber; 83. diversion channel; 84. collecting channel; 85. connecting column; 86. discharge pipe; 9. guide frame; 10. material diversion plate; 1001. diversion hole; 11. connecting ring; 12. fixing piece; 121. upper baffle plate; 122. lower baffle plate; 123. side scraper. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] See also Figure 1-Figure 12 , the present invention provides the following technical solutions:

[0049] Embodiment 1: The multi-tubular fixed bed reactor in this embodiment is convenient for evenly distributing and discharging the liquid or gaseous material to be treated, so that the material to be treated evenly enters the multiple catalyst placement tubes 7. For the specific structure, refer to the attached Figure 1-Figure 3 , Figure 9-12As shown, it includes a main outer shell 1 and a temperature measuring port 101 installed on the left side of the main outer shell 1; the upper cover body 2 and the lower cover body 3 are respectively connected to the upper and lower parts of the main outer shell 1, and the lower fixed plate 4 and the upper fixed plate 6 are slidably connected inside the main outer shell 1, and the upper part of the lower fixed plate 4 is connected to the upper fixed plate 6 through a circle of connecting rods 5; a circle of catalyst placement tubes 7 arranged at equal intervals are inserted through the interior of the lower fixed plate 4 and the upper fixed plate 6, and the lower outer side of the catalyst placement tube 7 forms a disassembly and installation structure with the lower fixed plate 4 through a snap-fit ​​assembly; the interior of the upper cover body 2 is installed with a guide frame 9 and a material diverter plate 10 from top to bottom through a bracket, and a temperature control tube 8 is rotatably installed in the middle of the guide frame 9 and the material diverter plate 10, and the outer sides of the lower fixed plate 4 and the upper fixed plate 6 are staggeredly installed with sliders, and the outer sides of the lower fixed plate 4 and the upper fixed plate 6 are slidably connected to the slide groove opened on the inner side wall of the main outer shell 1 through sliders.

[0050] The middle interior of the lower fixed disk 4 and the upper fixed disk 6 is hollow, and the temperature control tube 8 is inserted into the middle interior of the lower fixed disk 4 and the upper fixed disk 6. A feed pipe 201 is fixed through the upper interior of the upper cover 2, and the lower end of the feed pipe 201 is rotatably connected to the upper interior of the temperature control tube 8. A rectangular connecting column 85 is installed below the temperature control tube 8; a connecting shaft 301 is installed through the interior of the lower cover 3 through a sealed bearing, and the upper part of the connecting shaft 301 is concavely matched with the connecting column 85, and a discharge hole is fixed on the right side of the lower cover 3. Tube 302, a material temporary storage chamber 81 is opened inside the upper part of the temperature control tube 8, a circle of diverter channels 83 are opened at equal intervals inside the upper part of the temperature control tube 8, a diverter channel 83 is set on the lower outer side of the material temporary storage chamber 81, the lower end of the feed pipe 201 is inserted into the material temporary storage chamber 81, and diverter holes 1001 are opened at equal intervals on the bottom surface of the material diverter plate 10, and a catalyst placement tube 7 is correspondingly arranged below the diverter hole 1001, and the space in the material diverter plate 10 is connected with the space in the material temporary storage chamber 81 through the diverter channel 83.

[0051] A temperature control chamber 82 is provided inside the lower part of the temperature control tube 8, and the temperature control chamber 82 is arranged below the diversion channel 83. A collecting channel 84 with a "7"-shaped structure is provided inside the upper part of the temperature control tube 8. The collecting channel 84 and the diversion channel 83 are arranged alternately, and the lower end of the collecting channel 84 is connected to the interior of the temperature control chamber 82. A heat transfer medium flow tube 202 is installed on the outer side of the guide frame 9. The right end of the heat transfer medium flow tube 202 passes through the right side surface of the upper cover body 2, and the upper end of the collecting channel 84 is connected to the interior of the guide frame 9. A discharge pipe 86 is fixed to the interior of one of the collecting channels 84, and the lower end of the discharge pipe 86 is inserted into the temperature control chamber 82, and the upper end of the discharge pipe 86 is inserted into the guide frame 9.

[0052] First, the feed pipe 201 is connected to the external material conveying mechanism to be processed, and then the bottom end of the connecting shaft 301 is connected to the external motor. The motor drives the connecting shaft 301 to rotate. Since the connecting shaft 301 is connected to the temperature control tube 8 through the connecting column 85 of the rectangular structure, the temperature control tube 8 rotates together. At this time, the material to be processed enters the material temporary storage chamber 81 through the feed pipe 201, and then the material to be processed in the material temporary storage chamber 81 flows into the material diverter plate 10 through the diverter channel 83. Since the temperature control tube 8 drives the diverter channel 83 to rotate, the diverter channel 83 evenly flows the material to be processed into the material storage chamber 81. The material to be processed in the material diverter plate 10 flows evenly through the diverter hole 1001 into the corresponding catalyst placement tube 7 below. Since the diverter hole 1001 is arranged one-to-one with the catalyst placement tube 7, and a hose can be installed below the diverter hole 1001 so that the bottom of the hose is in contact with the connecting ring 11 above the catalyst placement tube 7. This can prevent the material to be processed flowing out of the diverter hole 1001 from escaping outward and failing to enter the catalyst placement tube 7 completely. This can further allow the material to be processed to enter the catalyst placement tube 7 evenly and quickly, thereby improving the reaction efficiency in the later stage.

[0053] Then, the material to be treated undergoes a series of reactions such as adsorption and activation with the catalyst in the catalyst placement tube 7. If it is an exothermic reaction, and the external temperature measuring mechanism detects that the temperature in the main outer shell 1 is high through the temperature measuring port 101, it is necessary to discharge the heat in the catalyst placement tube 7 to the outside for cooling operation. At this time, the coolant can flow through the tube 202 through the heat transfer medium into the guide frame 9, and then the coolant in the guide frame 9 flows into the temperature control chamber 82 through the collecting channel 84. At this time, the coolant in the temperature control chamber 82 can conduct heat to the heat of the catalyst placement tube 7 on the outside to avoid the increase of side reactions due to excessive reaction temperature. Later, the heat transfer medium will flow through the tube 202 and connect to the suction pump, and the coolant in the temperature control chamber 82 can be discharged through the discharge pipe 86 for replacement. If it is an endothermic reaction, when it is necessary to heat the outside of the catalyst placement tube 7, the hot water heat transfer medium will flow through the tube 202 into the guide frame 9, and then as shown above, the same principle can be used to avoid excessive temperature affecting the subsequent reaction work.

[0054] Embodiment 2: The multi-tubular fixed bed reactor in this embodiment can quickly discharge the catalyst in the catalyst placement tube 7, thereby further improving the replacement efficiency. For the specific structure, refer to the attached Figure 7-Figure 8As shown, the clamping assembly includes two disassembly blocks 71 symmetrically installed on the outer side below the catalyst placement tube 7. The lower fixed disk 4 and the upper fixed disk 6 are both provided with a circle of through holes 43 and first clamping grooves 41 arranged at equal intervals. The number of through holes 43 and the number of first clamping grooves 41 are arranged in a ratio of 1:2. The outer side of the through hole 43 is provided with the first clamping groove 41; the lower part of the first clamping groove 41 in the lower fixed disk 4 is solid, and the lower part of the first clamping groove 41 in the upper fixed disk 6 is open; the lower fixed disk 4 is provided with a circle of arc-shaped second clamping grooves 42 arranged at equal intervals, and the spaces within the first clamping groove 41, the second clamping groove 42 and the through hole 43 in the lower fixed disk 4 are connected; the first clamping groove 41 in the lower fixed disk 4 is solid, and the lower part of the first clamping groove 41 in the upper fixed disk 6 is open; the lower fixed disk 4 is provided with a circle of arc-shaped second clamping grooves 42 arranged at equal intervals, and the spaces within the three spaces of the first clamping groove 41, the second clamping groove 42 and the through hole 43 are connected; The inner concave and convex parts are matched with a disassembly block 71, the height of the first slot 41 in the lower fixed plate 4 is greater than the height of the second slot 42, and the height of the second slot 42 is greater than the height of the disassembly block 71. The disassembly block 71 can be rotated from the first slot 41 in the lower fixed plate 4 to the second slot 42, and a connecting ring 11 is threadedly connected to the upper outer side of the catalyst placement tube 7, and a fixing part 12 with a "T" shape structure is installed above the connecting ring 11. The outer side of the fixing part 12 inserted into the catalyst placement tube 7 is installed with an upper baffle 121 and a lower baffle 122 from top to bottom. The upper baffle 121 and the lower baffle 122 are mesh structures, and the outer sides of the upper baffle 121 and the lower baffle 122 are arranged to fit the inner wall of the catalyst placement tube 7.

[0055] On the basis of Example 1, when the catalyst in the catalyst placement tube 7 is deactivated and needs to be replaced, the upper cover body 2 is removed from the top of the main outer shell 1. At this time, the upper cover body 2 will drive the material diversion plate 10, the temperature control tube 8 and other parts to be removed together. At this time, the connecting column 85 is separated from the connecting shaft 301, so that the temperature control tube 8 is pulled out from the hollow area between the lower fixed plate 4 and the upper fixed plate 6. At this time, one of the catalyst placement tubes 7 is manually pulled upward, and then the catalyst placement tube 7 drives the lower fixed plate 4 and the upper fixed plate 6 move upward, at this time, the outer sides of the lower fixed plate 4 and the upper fixed plate 6 slide in the slide groove provided on the inner wall of the main outer shell 1, so as to facilitate the lower fixed plate 4 and the upper fixed plate 6 to be taken out from the main outer shell 1, and then the catalyst placement tube 7 can be rotated in turn, at this time, the disassembly block 71 on the outer side of the catalyst placement tube 7 is rotated from the second card groove 42 to the first card groove 41, and then the catalyst placement tube 7 is pulled upward, and the catalyst placement tube 7 can be pulled out from the through hole 43 in the lower fixed plate 4 and the upper fixed plate 6.

[0056] Then, the fixing part 12 is rotated manually, and the fixing part 12 drives the connecting ring 11 to rotate, so that the connecting ring 11 is separated from the catalyst placement tube 7. Then, the fixing part 12 is pulled upward, and the fixing part 12 drives the upper baffle plate 121 and the lower baffle plate 122 to move upward together, so that it is convenient to discharge the catalyst in the catalyst placement tube 7 and to replace the catalyst in the catalyst placement tube 7. Then, the lower baffle plate 122 is slowly inserted into the catalyst placement tube 7. During this process, new catalyst can be added to the catalyst placement tube 7.

[0057] Embodiment 3: The multi-tubular fixed bed reactor in this embodiment is convenient for replacing the deactivated catalyst at a later stage, and is easy to operate, saving time and effort. The specific structure is shown in the attached Figure 1-Figure 6 As shown, on the basis of Example 2, side scrapers 123 are installed at equal intervals between the upper baffle 121 and the lower baffle 122, and the outer side of the side scraper 123 is in contact with the inner wall of the catalyst placement tube 7. The arc length of the side scraper 123 is less than one twelfth of the inner diameter of the catalyst placement tube 7. When the fixing member 12 is rotated manually, the fixing member 12 will drive the upper baffle 121, the lower baffle 122 and the side scraper 123 to rotate together. Since the inner wall of the catalyst placement tube 7 is in contact with the side scraper 123, the side scraper 123 will scrape the catalyst adhered to the inner wall of the catalyst placement tube 7, thereby improving the efficiency and thoroughness of the catalyst discharge and facilitating the replacement of the catalyst at a later time.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-tubular fixed bed reactor, comprising a main outer shell (1), and a temperature measuring port (101) installed on the left side of the main outer shell (1); The upper and lower parts of the main outer shell (1) are respectively connected to an upper cover (2) and a lower cover (3); Features: The main outer shell (1) is slidably connected to a lower fixing plate (4) and an upper fixing plate (6), and the upper part of the lower fixing plate (4) is connected to the upper fixing plate (6) via a circle of connecting rods (5); A circle of catalyst placement tubes (7) arranged at equal intervals are inserted through the interior of the lower fixed plate (4) and the upper fixed plate (6), and the lower outer sides of the catalyst placement tubes (7) form a disassembly and installation structure with the lower fixed plate (4) through a snap-fit ​​assembly; A flow guide frame (9) and a material flow distribution plate (10) are installed from top to bottom inside the upper cover body (2) through a bracket, and a temperature control tube (8) is rotatably installed through the middle of the flow guide frame (9) and the material flow distribution plate (10).

2. A multi-tubular fixed bed reactor according to claim 1, characterized in that: Slide blocks are installed in an alternating manner on the outer sides of the lower fixed plate (4) and the upper fixed plate (6), and the outer sides of the lower fixed plate (4) and the upper fixed plate (6) are slidably connected to the slide grooves provided on the inner side wall of the main outer shell (1) through the slide blocks.

3. A multi-tubular fixed bed reactor according to claim 1, characterized in that: The clamping assembly comprises two disassembly blocks (71) symmetrically mounted on the outer side below the catalyst placement tube (7); The lower fixed plate (4) and the upper fixed plate (6) are each provided with a circle of through holes (43) and first slots (41) arranged at equal intervals, the number of the through holes (43) and the number of the first slots (41) being arranged in a ratio of 1:2, and the first slots (41) are arranged outside the through holes (43); The lower part of the first card slot (41) in the lower fixed plate (4) is solid, and the lower part of the first card slot (41) in the upper fixed plate (6) is open. A circle of arc-shaped second slots (42) are arranged at equal intervals inside the lower fixed plate (4), and the spaces within the first slot (41), the second slot (42) and the through hole (43) in the lower fixed plate (4) are connected; A disassembly block (71) is provided in a concave-convex manner in a first clamping groove (41) in the lower fixed plate (4); the height of the first clamping groove (41) in the lower fixed plate (4) is greater than the height of the second clamping groove (42); the height of the second clamping groove (42) is greater than the height of the disassembly block (71); and the disassembly block (71) can be rotated from the first clamping groove (41) in the lower fixed plate (4) to the second clamping groove (42).

4. A multi-tubular fixed bed reactor according to claim 1, characterized in that: The upper outer side of the catalyst placement tube (7) is threadedly connected to a connecting ring (11), a fixing piece (12) in a "T"-shaped structure is installed above the connecting ring (11), and an upper baffle (121) and a lower baffle (122) are installed from top to bottom on the outer side of the part of the fixing piece (12) inserted into the catalyst placement tube (7), the upper baffle (121) and the lower baffle (122) are mesh structures, and the outer sides of the upper baffle (121) and the lower baffle (122) are arranged to fit the inner wall of the catalyst placement tube (7).

5. A multi-tubular fixed bed reactor according to claim 4, characterized in that: Side scrapers (123) are installed at equal intervals between the upper baffle (121) and the lower baffle (122), the outer sides of the side scrapers (123) are in contact with the inner wall of the catalyst placement tube (7), and the arc length of the side scrapers (123) is less than one twelfth of the inner diameter of the catalyst placement tube (7).

6. A multi-tubular fixed bed reactor according to claim 1, characterized in that: The middle interior of the lower fixed plate (4) and the upper fixed plate (6) is hollow, and a temperature control tube (8) is inserted into the middle interior of the lower fixed plate (4) and the upper fixed plate (6); A feed pipe (201) is fixedly inserted into the upper interior of the upper cover body (2), the lower end of the feed pipe (201) is rotatably connected to the upper interior of the temperature control pipe (8), and a rectangular connection column (85) is installed below the temperature control pipe (8); A connecting shaft (301) is passed through the interior of the lower cover body (3) and is installed via a sealed bearing. The upper part of the connecting shaft (301) is concavely matched with the connecting column (85). A discharge pipe (302) is passed through and fixed to the right side of the lower cover body (3).

7. A multi-tubular fixed bed reactor according to claim 1, characterized in that: A material temporary storage chamber (81) is provided inside the upper part of the temperature control tube (8), a circle of diversion channels (83) are provided inside the upper part of the temperature control tube (8) at equal intervals, and a diversion channel (83) is provided on the lower outer side of the material temporary storage chamber (81); The lower end of the feed pipe (201) is inserted into the material temporary storage chamber (81); The bottom surface of the material diverter plate (10) is provided with diverter holes (1001) at equal intervals, and a catalyst placement tube (7) is correspondingly arranged below the diverter holes (1001); The space inside the material flow diversion plate (10) is connected to the space inside the material temporary storage chamber (81) through the flow diversion channel (83).

8. A multi-tubular fixed bed reactor according to claim 7, characterized in that: A temperature control chamber (82) is provided in the lower part of the temperature control tube (8), and the temperature control chamber (82) is arranged below the flow dividing channel (83). A collecting channel (84) in the shape of a letter "7" is provided in the upper part of the temperature control tube (8). The collecting channel (84) and the flow dividing channel (83) are arranged in an alternating manner, and the lower end of the collecting channel (84) is connected to the interior of the temperature control chamber (82).

9. A multi-tubular fixed bed reactor according to claim 8, characterized in that: A heat transfer medium flow tube (202) is installed on the outer side of the guide frame (9), the right end of the heat transfer medium flow tube (202) passes through the right side surface of the upper cover body (2), and the upper end of the collecting channel (84) is connected to the interior of the guide frame (9).

10. A multi-tubular fixed bed reactor according to claim 9, characterized in that: A discharge pipe (86) is fixedly inserted into the interior of one of the collecting channels (84), the lower end of the discharge pipe (86) is inserted into the temperature control chamber (82), and the upper end of the discharge pipe (86) is inserted into the guide frame (9).

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