Built-in tube bundle assembly for alkylation reactor

Abstract

The utility model relates to the technical field of pipe fittings, and discloses a built-in pipe bundle assembly for an alkylation reactor, which comprises the alkylation reactor, the cooling tube bundle assembly is mounted in the inner cavity of the alkylation reactor; the cooling tube bundle assembly comprises a fixing disc, a plurality of cooling tube bodies are installed on the fixing disc, an upper annular box body is fixedly installed between the tops of the multiple cooling tube bodies, and a lower annular box body is fixedly installed between the bottoms of the multiple cooling tube bodies; the upper portion and the lower portion of an inner cavity of each cooling pipe body are each provided with a rotary impeller structure. According to the utility model, as each cooling pipe body is internally provided with the rotary impeller structure, when a refrigerant respectively passes through the two groups of rotary impeller structures from top to bottom, the passing time of the refrigerant in the cooling pipe bodies can be prolonged under the action of the rotary impeller structures, and when the passing time of the refrigerant in each cooling pipe body is prolonged, the refrigerant in each cooling pipe body can be cooled. The heat exchange efficiency of the cooling tube bundle assembly in the alkylation reactor can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fittings, in particular to a built-in pipe bundle component for an alkylation reactor. Background Art

[0002] Alkylation is the process of transferring an alkyl group from one molecule to another, and is a reaction that introduces an alkyl group into a compound molecule. Under the action of a catalyst, the alkylation system combines low molecular weight olefins with isobutane to form an alkylate, which is a gasoline additive that has an anti-knock effect and produces clean products after combustion.

[0003] Liquid phase alkylation can be carried out in an alkylation reactor. Specifically, the alkylation reactor usually adopts an effluent refrigeration method and often uses an internal tube bundle for cooling. After the reaction effluent flows out of the acid settler, it passes through a pressure reducing regulating valve to create a low temperature and low pressure. This cold fluid is used as a refrigerant and flows through the internal tube bundle of the alkylation reactor to remove the heat of the alkylation reaction.

[0004] The Chinese utility model patent with the announcement number CN213791568U discloses an alkylation reactor with a tube bundle anti-corrosion function, comprising a shell and a U-shaped tube bundle. An inner circulation sleeve is arranged in the shell, and the U-shaped tube bundle is arranged in the inner circulation sleeve. The U-shaped tube bundle is fixedly connected to the shell through a tube sheet. The shell is provided with a refrigerant inlet, a refrigerant outlet, a reactant and acid outlet, a mixture outlet, a waste acid outlet, a raw material inlet, and an acid inlet. The raw material inlet and the acid inlet are connected to the inner circulation sleeve. A U-shaped protective plate is sheathed on the outer side of the U-shaped tube bundle.

[0005] However, in combination with the patent document Figure 1 It can be clearly seen that the U-shaped tube bundle in the alkylation reactor cannot extend the time for the refrigerant to pass through it. When the time for the refrigerant to pass through the U-shaped tube bundle is too short, heat exchange cannot be achieved to a greater extent.

[0006] Based on this, a built-in tube bundle assembly for an alkylation reactor is now proposed. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the shortcomings of the prior art, the utility model provides a built-in tube bundle assembly for an alkylation reactor to solve the problem raised in the background technology: the U-shaped tube bundle in the alkylation reactor in the prior art cannot extend the time for the refrigerant to pass through it, and when the time for the refrigerant to pass through the U-shaped tube bundle is too short, heat exchange cannot be achieved to a greater extent.

[0009] (II) Technical solution

[0010] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0011] A built-in tube bundle assembly for an alkylation reactor, comprising:

[0012] An alkylation reactor, wherein the bottom of the alkylation reactor is provided with a reactant feed port, and the top of the alkylation reactor is provided with a reactant discharge port;

[0013] A cooling tube bundle assembly, wherein the cooling tube bundle assembly is installed in the inner cavity of the alkylation reactor;

[0014] The cooling tube bundle assembly comprises a fixed disk, which is fixedly installed in the middle of the inner cavity of the alkylation reactor, and a plurality of cooling tube bodies are installed on the fixed disk, and the plurality of cooling tube bodies are circumferentially distributed on the fixed disk, an upper annular box body is fixedly installed between the tops of the plurality of cooling tube bodies, and a lower annular box body is fixedly installed between the bottoms of the plurality of cooling tube bodies;

[0015] A feed pipe is fixedly installed on one side of the top of the upper annular box, and one end of the top of the feed pipe passes through the top of the alkylation reactor upwards; a discharge pipe is fixedly installed on one side of the bottom of the lower annular box, and one end of the bottom of the discharge pipe passes through the bottom of the alkylation reactor downwards;

[0016] The upper and lower parts of the inner cavity of each cooling tube body are equipped with rotating impeller structures.

[0017] Preferably, a central flow channel is opened in the central portion of the fixed disk, and a plurality of side flow channels are opened at the edge of the fixed disk, and the plurality of side flow channels are distributed circumferentially on the fixed disk.

[0018] Preferably, a plurality of mounting grooves are provided on the fixing plate, and the plurality of mounting grooves are distributed circumferentially on the fixing plate;

[0019] Each of the installation grooves is spaced apart from the side flow channel;

[0020] Each of the installation slots corresponds to a cooling tube body one by one, and each of the cooling tube bodies is plugged and installed in the corresponding installation slot.

[0021] Preferably, the tops of each cooling tube body are flush with each other, and the bottoms of each cooling tube body are flush with each other.

[0022] Preferably, a plurality of upper through holes are provided at the bottom of the inner cavity of the upper annular box body, and the plurality of upper through holes are distributed circumferentially on the upper annular box body, each of the upper through holes corresponds to a cooling tube body one by one, and each of the upper through holes is communicated with the inner cavity of the corresponding cooling tube body;

[0023] A plurality of lower through holes are opened on the top of the inner cavity of the lower annular box body, and the plurality of lower through holes are distributed circumferentially on the lower annular box body. The plurality of lower through holes correspond to the cooling pipe bodies one by one, and each of the lower through holes is connected to the inner cavity of the corresponding cooling pipe body.

[0024] Preferably, the rotating impeller structure includes two external fixing frames, two internal fixing frames and two spiral moving parts;

[0025] The two external fixing frames are respectively fixedly mounted on the top and bottom of the inner cavity of the cooling tube body;

[0026] The two inner fixing frames are respectively fixedly mounted on the upper part and the lower part of the inner cavity of the cooling tube body;

[0027] The two spiral motion members are respectively installed between the corresponding external fixing frame and the internal fixing frame.

[0028] Preferably, the two spiral motion members include two rotating shafts and two sets of spiral blades;

[0029] The two rotating shafts are rotatably mounted between the corresponding outer fixing frame and the inner fixing frame;

[0030] Each set of spiral blades is fixedly mounted on a corresponding rotating shaft, and each set of spiral blades is circumferentially distributed on the corresponding rotating shaft.

[0031] Preferably, the outer fixing frame and the inner fixing frame are both circular and consist of an outer ring, an inner ring, and a plurality of connecting pieces fixedly installed between the outer ring and the inner ring;

[0032] The two ends of the rotating shaft are rotatably mounted in the inner rings of the outer fixing frame and the inner fixing frame respectively.

[0033] Beneficial effects:

[0034] The utility model provides a built-in tube bundle assembly for an alkylation reactor, which has the following beneficial effects:

[0035] 1. In the utility model, when the refrigerant enters each cooling tube body, since the upper and lower parts of each cooling tube body are equipped with rotating impeller structures, when the refrigerant passes through the two sets of rotating impeller structures from top to bottom, the time for the refrigerant to pass through the cooling tube body can be extended under the action of the rotating impeller structure. When the time for the refrigerant to pass through each cooling tube body becomes longer, the heat exchange efficiency of the cooling tube bundle assembly in the alkylation reactor can be further improved.

[0036] 2. In the utility model, when the refrigerant passes through the inner cavity of the cooling tube body from top to bottom, the flow rate can be used to drive the spiral moving part, so that the spiral moving part rotates between the outer fixing frame and the inner fixing frame. When the refrigerant passes through the two groups of spiral moving parts in sequence and drives them to rotate, the time the refrigerant passes through the cooling tube body can be effectively extended, so as to further improve the heat exchange efficiency of the cooling tube bundle assembly.

[0037] 3. In the present invention, the central flow channel and multiple side flow channels opened on the fixed disk can facilitate the flow of reactants.

[0038] Fourth, in the present invention, the outer fixing frame and the inner fixing frame are both circular, and are composed of an outer ring, an inner ring, and a plurality of connecting pieces fixedly installed between the outer ring and the inner ring;

[0039] A flow channel can be formed between adjacent connecting sheets, and a refrigerant can pass through the flow channel and drive the movement of the spiral moving member. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0041] Figure 2 It is a three-dimensional schematic diagram of a partial cross section of the utility model;

[0042] Figure 3 It is a three-dimensional schematic diagram of the cooling tube bundle assembly of the utility model;

[0043] Figure 4 It is a three-dimensional schematic diagram of a partial cross section of the cooling tube bundle assembly of the present invention;

[0044] Figure 5 It is a three-dimensional schematic diagram of a partial cross-section of a cooling tube bundle assembly of the utility model from a top view;

[0045] Figure 6 It is a three-dimensional schematic diagram of a partial cross-section of a cooling tube bundle assembly of the present invention when viewed from above;

[0046] Figure 7 It is a three-dimensional schematic diagram of a partial cross section of the cooling tube body and the rotating impeller structure of the utility model;

[0047] Figure 8 It is a three-dimensional schematic diagram of the rotating impeller structure of the utility model;

[0048] Fig. 9 It is a three-dimensional schematic diagram of the fixing plate of the utility model.

[0049] In the figure: 10, alkylation reactor; 101, reactant feed port; 102, reactant discharge port; 20, cooling tube bundle assembly; 201, fixed plate; 2011, central flow channel; 2012, mounting groove; 2013, side flow channel; 202, cooling tube body; 203, upper annular box; 2031, upper through hole; 204, lower annular box; 2041, lower through hole; 205, feed pipe; 206, discharge pipe; 30, rotating impeller structure; 301, external fixing frame; 302, internal fixing frame; 303, rotating shaft; 304, spiral blade. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] Embodiment 1

[0052] Alkylation is the process of transferring an alkyl group from one molecule to another, and is a reaction that introduces an alkyl group into a compound molecule. Under the action of a catalyst, the alkylation system combines low molecular weight olefins with isobutane to form an alkylate, which is a gasoline additive that has an anti-knock effect and produces clean products after combustion.

[0053] Liquid phase alkylation can be carried out in an alkylation reactor. Specifically, the alkylation reactor usually adopts an effluent refrigeration method and often uses an internal tube bundle for cooling. After the reaction effluent flows out of the acid settler, it passes through a pressure reducing regulating valve to create a low temperature and low pressure. This cold fluid is used as a refrigerant and flows through the internal tube bundle of the alkylation reactor to remove the heat of the alkylation reaction.

[0054] Chinese utility model patent with announcement number CN213791568U discloses an alkylation reactor with a tube bundle anti-corrosion function.

[0055] However, in combination with the patent document Figure 1 It can be clearly seen that the U-shaped tube bundle in the alkylation reactor cannot extend the time for the refrigerant to pass through it. When the time for the refrigerant to pass through the U-shaped tube bundle is too short, heat exchange cannot be achieved to a greater extent.

[0056] Based on this, in order to solve the above technical problems, the following technical solutions are now adopted, as follows:

[0057] like Figure 1-4 As shown, the utility model provides a technical solution:

[0058] A built-in tube bundle assembly for an alkylation reactor, comprising:

[0059] The alkylation reactor 10 has a reactant feed port 101 at the bottom and a reactant discharge port 102 at the top. The reactant feed port 101 is used for feeding reactants, and the reactant discharge port 102 is used for discharging reactants.

[0060] A cooling tube bundle assembly 20, wherein the cooling tube bundle assembly 20 is installed in the inner cavity of the alkylation reactor 10;

[0061] The cooling tube bundle assembly 20 includes a fixed disk 201, which is fixedly installed in the middle of the inner cavity of the alkylation reactor 10, and a plurality of cooling tube bodies 202 are installed on the fixed disk 201. The plurality of cooling tube bodies 202 are circumferentially distributed on the fixed disk 201, an upper annular box body 203 is fixedly installed between the tops of the plurality of cooling tube bodies 202, and a lower annular box body 204 is fixedly installed between the bottoms of the plurality of cooling tube bodies 202;

[0062] A feed pipe 205 is fixedly installed on one side of the top of the upper annular box 203, and one end of the top of the feed pipe 205 passes through the top of the alkylation reactor 10 upwards. A discharge pipe 206 is fixedly installed on one side of the bottom of the lower annular box 204, and one end of the bottom of the discharge pipe 206 passes through the bottom of the alkylation reactor 10 downwards.

[0063] Rotating impeller structures 30 are installed at the upper and lower parts of the inner cavity of each cooling tube body 202 .

[0064] In this embodiment, the refrigerant can enter the upper annular box 203 through the feed pipe 205, and then enter each cooling tube body 202 through the upper annular box 203, and finally flow out through the discharge pipe 206 at the bottom of each cooling tube body 202.

[0065] When the refrigerant enters each cooling tube body 202, since the upper and lower parts of each cooling tube body 202 are installed with rotating impeller structures 30, when the refrigerant passes through the two groups of rotating impeller structures 30 from top to bottom, the refrigerant can extend the time it takes to pass through the cooling tube body 202 under the action of the rotating impeller structure 30. Specifically, when the refrigerant passes through the rotating impeller structure 30, the flow rate of the refrigerant itself will drive the rotating impeller structure 30 and cause the rotating impeller structure 30 to rotate. When the rotating impeller structure 30 rotates, the refrigerant will also perform spiral motion with the rotation of the rotating impeller structure 30. Since the refrigerant performs spiral motion in the cooling tube body 202, the movement distance of the refrigerant in the cooling tube body 202 is also increased, so the residence time of the refrigerant in the cooling tube body 202 is increased.

[0066] Therefore, when the passage time of the coolant in each cooling tube body 202 becomes longer, the heat exchange efficiency of the cooling tube bundle assembly 20 in the alkylation reactor 10 can be further improved.

[0067] Embodiment 2

[0068] like Figure 5-6 as well as Fig. 9 As shown, based on the first embodiment, the following improvements are made:

[0069] Furthermore, a central flow channel 2011 is opened at the central portion of the fixed disk 201 , and a plurality of side flow channels 2013 are opened at the edge of the fixed disk 201 . The plurality of side flow channels 2013 are distributed circumferentially on the fixed disk 201 .

[0070] In this embodiment, the central flow channel 2011 and the plurality of side flow channels 2013 provided on the fixed disk 201 can facilitate the flow of reactants.

[0071] Furthermore, a plurality of mounting grooves 2012 are formed on the fixing plate 201, and the plurality of mounting grooves 2012 are distributed circumferentially on the fixing plate 201;

[0072] Each installation groove 2012 is spaced apart from the side flow channel 2013;

[0073] Each installation slot 2012 corresponds to a cooling tube body 202 one by one, and each cooling tube body 202 is plugged and installed in the corresponding installation slot 2012 .

[0074] In this embodiment, the fixing plate 201 can fasten the corresponding cooling tube body 202 through a plurality of mounting grooves 2012 .

[0075] Specifically, the tops of each cooling tube body 202 are flush with each other, and the bottoms of each cooling tube body 202 are flush with each other.

[0076] Furthermore, a plurality of upper through holes 2031 are provided at the bottom of the inner cavity of the upper annular box body 203, and the plurality of upper through holes 2031 are distributed circumferentially on the upper annular box body 203, and each upper through hole 2031 corresponds to a cooling tube body 202 one by one, and each upper through hole 2031 is connected to the inner cavity of the corresponding cooling tube body 202, so that the inner cavity of the upper annular box body 203 can be connected to the inner cavity of each cooling tube body 202;

[0077] A plurality of lower through holes 2041 are provided at the top of the inner cavity of the lower annular box body 204, and the plurality of lower through holes 2041 are distributed circumferentially on the lower annular box body 204. The plurality of lower through holes 2041 correspond to the cooling tube bodies 202 one by one, and each of the lower through holes 2041 is connected to the inner cavity of the corresponding cooling tube body 202, so that the inner cavity of the lower annular box body 204 can be connected to the inner cavity of each cooling tube body 202.

[0078] Embodiment 3

[0079] like Figure 7-8 As shown, based on the first embodiment, the following improvements are made:

[0080] Furthermore, the rotating impeller structure 30 includes two outer fixing frames 301, two inner fixing frames 302 and two spiral motion members;

[0081] Two external fixing frames 301 are respectively fixedly mounted on the top and bottom of the inner cavity of the cooling tube body 202;

[0082] The two inner fixing frames 302 are respectively fixedly mounted on the upper part and the lower part of the inner cavity of the cooling tube body 202;

[0083] The two spiral motion members are respectively installed between the corresponding outer fixing frame 301 and the inner fixing frame 302 .

[0084] In this embodiment, when the refrigerant passes through the inner cavity of the cooling tube body 202 from top to bottom, the flow rate can be used to drive the spiral moving parts, so that the spiral moving parts rotate between the outer fixing frame 301 and the inner fixing frame 302. When the refrigerant passes through the two groups of spiral moving parts in turn and drives them to rotate, the time the refrigerant passes through the cooling tube body 202 can be effectively extended, so as to further improve the heat exchange efficiency of the cooling tube bundle assembly 20.

[0085] Specifically, the two spiral motion members include two rotating shafts 303 and two sets of spiral blades 304;

[0086] The two rotating shafts 303 are rotatably mounted between the corresponding outer fixing frame 301 and the inner fixing frame 302;

[0087] Each set of spiral blades 304 is fixedly mounted on the corresponding rotating shaft 303 , and each set of spiral blades 304 is circumferentially distributed on the corresponding rotating shaft 303 .

[0088] In this embodiment, the rotating shaft 303 and the plurality of spiral blades 304 are the preferred structural forms of the spiral moving part.

[0089] More specifically, the outer fixing frame 301 and the inner fixing frame 302 are both circular, and are composed of an outer ring, an inner ring, and a plurality of connecting pieces fixedly installed between the outer ring and the inner ring;

[0090] A flow channel can be formed between adjacent connecting sheets, and a refrigerant can pass through the flow channel and drive the movement of the spiral moving member.

[0091] Both ends of the rotating shaft 303 are rotatably mounted in the inner rings of the outer fixing frame 301 and the inner fixing frame 302 respectively.

[0092] In summary, the workflow of the utility model is:

[0093] like Figure 1-9 As shown, the refrigerant can enter the upper annular box 203 through the feed pipe 205, and then enter each cooling tube body 202 through the upper annular box 203, and finally flow out through the discharge pipe 206 at the bottom of each cooling tube body 202.

[0094] When the refrigerant enters each cooling tube body 202, since the upper and lower parts of each cooling tube body 202 are equipped with rotating impeller structures 30, when the refrigerant passes through the two sets of rotating impeller structures 30 from top to bottom, the refrigerant can extend the time it passes through the cooling tube body 202 under the action of the rotating impeller structures 30. When the time it passes through each cooling tube body 202 becomes longer, the heat exchange efficiency of the cooling tube bundle assembly 20 in the alkylation reactor 10 can be further improved.

[0095] Specifically, when the refrigerant passes through the inner cavity of the cooling tube body 202 from top to bottom, the flow rate can be used to drive the spiral moving parts, so that the spiral moving parts rotate between the outer fixing frame 301 and the inner fixing frame 302. When the refrigerant passes through the two groups of spiral moving parts in turn and drives them to rotate, the time the refrigerant passes through the cooling tube body 202 can be effectively extended, so as to further improve the heat exchange efficiency of the cooling tube bundle assembly 20.

[0096] The two spiral motion parts include two rotating shafts 303 and two sets of spiral blades 304;

[0097] The two rotating shafts 303 are rotatably mounted between the corresponding outer fixing frame 301 and the inner fixing frame 302;

[0098] Each set of spiral blades 304 is fixedly mounted on the corresponding rotating shaft 303 , and each set of spiral blades 304 is circumferentially distributed on the corresponding rotating shaft 303 .

[0099] The rotating shaft 303 and the plurality of spiral blades 304 are the preferred structural forms of the spiral moving parts;

[0100] The outer fixing frame 301 and the inner fixing frame 302 are both circular, and are composed of an outer ring, an inner ring, and a plurality of connecting pieces fixedly installed between the outer ring and the inner ring;

[0101] A flow channel can be formed between adjacent connecting sheets, and a refrigerant can pass through the flow channel and drive the movement of the spiral moving member.

[0102] Both ends of the rotating shaft 303 are rotatably mounted in the inner rings of the outer fixing frame 301 and the inner fixing frame 302 respectively.

[0103] The above different embodiments can be combined, replaced and used in conjunction with each other.

[0104] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0105] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A built-in tube bundle assembly for an alkylation reactor, characterized in that: include: An alkylation reactor (10), wherein the bottom of the alkylation reactor (10) has a reactant feed port (101), and the top of the alkylation reactor (10) has a reactant discharge port (102); A cooling tube bundle assembly (20), wherein the cooling tube bundle assembly (20) is installed in the inner cavity of the alkylation reactor (10); The cooling tube bundle assembly (20) comprises a fixed disk (201), the fixed disk (201) being fixedly mounted in the middle of the inner cavity of the alkylation reactor (10), a plurality of cooling tube bodies (202) being mounted on the fixed disk (201), the plurality of cooling tube bodies (202) being circumferentially distributed on the fixed disk (201), an upper annular box body (203) being fixedly mounted between the tops of the plurality of cooling tube bodies (202), and a lower annular box body (204) being fixedly mounted between the bottoms of the plurality of cooling tube bodies (202); A feed pipe (205) is fixedly mounted on one side of the top of the upper annular box (203), and one end of the top of the feed pipe (205) penetrates upward through the top of the alkylation reactor (10); a discharge pipe (206) is fixedly mounted on one side of the bottom of the lower annular box (204), and one end of the bottom of the discharge pipe (206) penetrates downward through the bottom of the alkylation reactor (10); The upper and lower parts of the inner cavity of each cooling tube body (202) are both installed with a rotating impeller structure (30).

2. The internal tube bundle assembly for an alkylation reactor according to claim 1, characterized in that: A central flow channel (2011) is provided at the central portion of the fixed disk (201), and a plurality of side flow channels (2013) are provided at the edge of the fixed disk (201), wherein the plurality of side flow channels (2013) are distributed circumferentially on the fixed disk (201).

3. The internal tube bundle assembly for an alkylation reactor according to claim 2, characterized in that: A plurality of mounting grooves (2012) are provided on the fixing plate (201), and the plurality of mounting grooves (2012) are distributed circumferentially on the fixing plate (201); Each of the installation grooves (2012) and the side flow channel (2013) is spaced apart from each other; Each of the installation slots (2012) corresponds to a cooling tube body (202) one by one, and each of the cooling tube bodies (202) is plugged and installed in the corresponding installation slot (2012).

4. The internal tube bundle assembly for an alkylation reactor according to claim 3, characterized in that: The tops of each cooling tube body (202) are flush with each other, and the bottoms of each cooling tube body (202) are flush with each other.

5. The internal tube bundle assembly for an alkylation reactor according to claim 4, characterized in that: A plurality of upper through holes (2031) are provided at the bottom of the inner cavity of the upper annular box body (203), the plurality of upper through holes (2031) are distributed circumferentially on the upper annular box body (203), each of the upper through holes (2031) corresponds to a cooling tube body (202) one by one, and each of the upper through holes (2031) is connected to the inner cavity of the corresponding cooling tube body (202); A plurality of lower through holes (2041) are provided at the top of the inner cavity of the lower annular box body (204); the plurality of lower through holes (2041) are distributed circumferentially on the lower annular box body (204); the plurality of lower through holes (2041) correspond to the cooling tube body (202) one by one, and each of the lower through holes (2041) is connected to the inner cavity of the corresponding cooling tube body (202).

6. The internal tube bundle assembly for an alkylation reactor according to claim 1, characterized in that: The rotating impeller structure (30) comprises two external fixing frames (301), two internal fixing frames (302) and two spiral moving parts; The two external fixing frames (301) are respectively fixedly mounted on the top and bottom of the inner cavity of the cooling tube body (202); The two inner fixing frames (302) are respectively fixedly mounted on the upper part and the lower part of the inner cavity of the cooling tube body (202); The two spiral moving parts are respectively installed between the corresponding external fixing frame (301) and the internal fixing frame (302).

7. The internal tube bundle assembly for an alkylation reactor according to claim 6, characterized in that: The two spiral motion members include two rotating shafts (303) and two sets of spiral blades (304); The two rotating shafts (303) are rotatably mounted between the corresponding outer fixing frame (301) and the inner fixing frame (302); Each group of spiral blades (304) is fixedly mounted on a corresponding rotating shaft (303), and each group of spiral blades (304) is circumferentially distributed on the corresponding rotating shaft (303).

8. The internal tube bundle assembly for an alkylation reactor according to claim 7, characterized in that: The outer fixing frame (301) and the inner fixing frame (302) are both circular and consist of an outer ring, an inner ring, and a plurality of connecting pieces fixedly installed between the outer ring and the inner ring; Both ends of the rotating shaft (303) are rotatably mounted in the inner rings of the outer fixing frame (301) and the inner fixing frame (302), respectively.

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