A reactive distillation column

Abstract

The application provides a reactive rectifying tower, comprising a tower body extending in a vertical direction, a reboiler and a condenser arranged at two ends respectively, a reaction section arranged between a stripping section and a rectifying section, a heat exchange device and a push-pull frame, the heat exchange device being connected with the reboiler, the push-pull frame being slidingly installed on the tower body, an inlet and an outlet being arranged on a side wall of the tower body, a limiting sealing mechanism being arranged inside, the limiting sealing mechanism comprising a baffle arranged on two sides of the push-pull frame and a top plate arranged above, the top plate being arranged in an inclined manner, one end of the top plate being provided with a downwardly bent abutting portion, one end of the push-pull frame being provided with a butt plate corresponding to the abutting portion, and the butt plate being arranged on a side of the abutting portion close to the heat exchange device. The catalyst is installed on the push-pull frame, the catalyst can be replaced in the state that the push-pull frame slides out, after the push-pull frame slides out by a certain displacement, the end butt plate abuts against the top plate, and the push-pull frame is independent of the internal space of the tower body in cooperation with the baffle, so that the catalyst can be replaced without stopping the machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rectifying column, in particular to a reactive rectifying column. BACKGROUND

[0002] As a core technology means for realizing the integration of "reaction-separation" in the chemical industry, the reactive rectifying technology has been widely used in ester synthesis, ether preparation, isomer separation and many other industrial production scenes due to its significant advantages in improving reaction conversion rate, reducing energy consumption and reducing equipment floor area. The reactive rectifying column, as the core equipment of the technology, integrates the catalytic reaction zone and the rectifying separation zone inside, fills the catalyst in the column, so that the raw materials can complete the rectifying separation and realize the target chemical reaction under the action of the catalyst, breaking the limitation of traditional reaction and separation process.

[0003] In actual industrial application, the operation performance of the reactive rectifying column is directly related to the catalyst activity and the reaction heat utilization efficiency; as the core driving medium of the reaction, the activity of the catalyst will gradually decrease with the extension of the running time, and when the activity decreases to a certain threshold, it needs to be replaced in time to ensure the reaction efficiency and product quality; if the reaction heat generated in the reaction process cannot be effectively recycled, not only will it cause serious waste of energy, but also will it cause imbalance of the temperature field in the column, affecting the rectifying separation effect and increasing the production energy consumption and cost. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a reactive rectifying column.

[0005] The present application provides a reactive rectifying column, comprising:

[0006] a column body extending in a vertical direction, two ends of which are respectively provided with a reboiler and a condenser, and the inside of which comprises a stripping section, a reaction section and a rectifying section;

[0007] The reaction section is located between the stripping section and the rectifying section, and comprises a heat exchange device coaxial with the column body and a push-pull frame arranged around the heat exchange device;

[0008] The heat exchange device is connected with the reboiler and is used for recycling the reaction heat;

[0009] The push-pull frame is slidingly installed on the column body, and the sliding direction is parallel to the radial direction of the column body, and is used for installing the catalyst;

[0010] An inlet and an outlet for the push-pull frame to pass through are arranged on the side wall of the column body, and a limiting and sealing mechanism for limiting the sliding out distance of the push-pull frame is arranged inside;

[0011] The limiting and sealing mechanism comprises a baffle located on each side of the push-pull frame and a top plate located above the push-pull frame.

[0012] The top plate is inclinedly arranged, and the height of the end close to the heat exchange device is relatively low and is provided with a downward-bent abutting portion;

[0013] The end of the push-pull frame close to the heat exchange device is provided with a butt plate corresponding to the abutting portion, for abutting and sealing with the abutting portion;

[0014] The butt plate is vertically installed on the push-pull frame and is located on the side of the abutting portion close to the heat exchange device.

[0015] Further,

[0016] The heat exchange device comprises a shell with a square cross section and a heat exchange pipeline located in the shell;

[0017] The heat exchange pipeline is arranged in the shell, and two ends thereof are connected with the reboiler respectively to form a circulation;

[0018] The shell is a closed structure, and is further filled with a heat-conducting medium.

[0019] Further,

[0020] The shell and the tower body are connected through the baffles;

[0021] The baffles comprise a plurality of baffles, two baffles form a group, and are located on two sides of the push-pull frame and are parallel to each other;

[0022] Two baffles of the same group are correspondingly installed at two corners on the same side of the shell, and one end of the two baffles is fixedly connected with the tower body.

[0023] Further,

[0024] The push-pull frame is slidably installed on a support frame;

[0025] The support frame is located between two baffles of the same group, and is fixedly connected with the baffles, the tower body and the shell;

[0026] The support frame is located below the push-pull frame, and is provided with a sliding groove extending along the radial direction of the tower body;

[0027] The bottom of the push-pull frame is provided with a matching guide wheel corresponding to the sliding groove.

[0028] Further,

[0029] The width of the butt plate matches the distance between two baffles corresponding to the butt plate, for forming a transverse seal;

[0030] The height of the butt plate matches the height of the abutting portion, for forming a vertical seal.

[0031] Further,

[0032] The baffle is away from one side of the push-pull frame, and a connecting plate is further arranged between adjacent baffles.

[0033] The connecting plate is respectively located at the upper and lower ends of the baffle and connected with the tower body to form a sealed cavity.

[0034] Further,

[0035] The two ends of the sealed cavity are respectively connected with the reboiler to form a circulation.

[0036] The two baffles are further provided with a partition plate on the side close to each other.

[0037] The number of the partition plate includes multiple, which is parallel to the connecting plate and staggered arranged.

[0038] Further,

[0039] The top plate is further provided with a horizontal part away from one end of the abutting part, and the horizontal part is connected with the tower body.

[0040] The horizontal part is provided with uniformly arranged through holes in the circumferential direction, and the top is provided with a slide plate which can slide relative to each other.

[0041] The distance between the through hole and the inner arm of the tower body is the same, which is used for the gas phase below to pass through.

[0042] The slide plate is arc-shaped, and the two ends are respectively connected with the tower body through a hydraulic cylinder for controlling the on-off of the through hole.

[0043] Further,

[0044] The cylinder body of the hydraulic cylinder is fixedly installed outside the tower body, and the piston rod is connected with the slide plate.

[0045] The piston rod penetrates the side wall of the tower body and is connected with the slide plate through a hinge shaft.

[0046] The side of the slide plate close to the tower body is provided with a C-shaped mounting groove corresponding to the piston rod.

[0047] The hinge shaft extends in the vertical direction and penetrates the slide plate and the piston rod respectively to form a hinge.

[0048] Further,

[0049] The tower body is further provided with a cover outside the inlet and outlet.

[0050] The cover is detachably connected with the tower body through bolts for controlling the on-off of the inlet and outlet.

[0051] The application has the advantages and positive effects that:

[0052] The technical scheme has the advantages and positive effects that: the catalyst is installed on the push-pull frame, and the inlet and outlet on the tower body can replace the catalyst in the state that the push-pull frame slides out; meanwhile, when the push-pull frame slides out a certain displacement, the end abutting plate will form an abutment with the top plate, and then the baffle plates on both sides can make the space where the push-pull frame is located and the internal space of the tower body independent of each other, thereby realizing the replacement of the catalyst without stopping the machine; meanwhile, the heat exchange device coaxially arranged in the middle of the tower body can effectively recycle the heat generated in the reaction process through the circulation with the reboiler. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 The structure schematic diagram of the reaction rectifying tower provided for the embodiment of the application is shown in the figure.

[0054] Figure 2 The structure schematic diagram of the reaction section of the reaction rectifying tower provided for the embodiment of the application is shown in the figure.

[0055] Figure 3 The structure schematic diagram of the push-pull frame of the reaction rectifying tower provided for the embodiment of the application is shown in the figure.

[0056] Figure 4 The structure schematic diagram of the baffle plate of the reaction rectifying tower provided for the embodiment of the application is shown in the figure.

[0057] The text annotations in the figure are as follows: 100-tower body; 101-inlet and outlet; 110-reboiler; 120-condenser; 130-baffle plate; 131-connection plate; 132-separation plate; 140-top plate; 141-abutment part; 150-sliding plate; 151-hydraulic cylinder; 160-closure; 200-heat exchange device; 210-push-pull frame; 211-abutting plate. DETAILED DESCRIPTION

[0058] In order to make the person skilled in the art better understand the technical scheme of the application, the application will be described in detail below with reference to the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the application.

[0059] Please refer to Figures 1-4The embodiment provides a reactive distillation column, which comprises a column body 100 extending in a vertical direction, a reboiler 110 and a condenser 120 arranged at two ends of the column body 100 respectively, and a stripping section, a reaction section and a rectification section arranged in the column body 100; the reaction section is located between the stripping section and the rectification section, and comprises a heat exchange device 200 coaxial with the column body 100 and a push-pull frame 210 arranged around the heat exchange device 200; the heat exchange device 200 is connected with the reboiler 110 and used for recycling reaction heat; the push-pull frame 210 is slidingly installed on the column body 100, and a sliding direction of the push-pull frame 210 is parallel to a radial direction of the column body 100, and the push-pull frame 210 is used for mounting a catalyst; an inlet and outlet 101 for the push-pull frame 210 to pass through is arranged on a side wall of the column body 100, and a limiting and sealing mechanism for limiting a sliding-out distance of the push-pull frame 210 is arranged in the column body 100; the limiting and sealing mechanism comprises a baffle 130 arranged on each side of the push-pull frame 210 and a top plate 140 arranged above the push-pull frame 210; the top plate 140 is arranged in an inclined mode, a height of one end of the top plate 140 close to the heat exchange device 200 is relatively low, and a butt joint part 141 bent downward is arranged on the one end; a butt joint plate 211 corresponding to the butt joint part 141 is arranged on one end of the push-pull frame 210 close to the heat exchange device 200, and is used for abutting and sealing with the butt joint part 141; the butt joint plate 211 is vertically installed on the push-pull frame 210, and is located on a side of the butt joint part 141 close to the heat exchange device 200.

[0060] In the embodiment, the column body 100 extends in a vertical direction, the condenser 120 is arranged at a top of the column body 100, and the reboiler 110 is arranged at a bottom of the column body 100; the column body 100 comprises, from bottom to top, the stripping section, the reaction section and the rectification section, and the reaction section is located between the stripping section and the rectification section.

[0061] In the embodiment, the reaction section comprises the heat exchange device 200 coaxial with the column body 100 and a plurality of push-pull frames 210 arranged around the heat exchange device 200 in a circumferential direction; the heat exchange device 200 is connected with the reboiler 110 through a pipeline, and is used for recycling reaction heat in a reaction process and transmitting the reaction heat to the reboiler 110 for recycling, so that energy efficiency is improved.

[0062] In the embodiment, the push-pull frame 210 is slidingly installed on the column body 100, and a sliding direction of the push-pull frame 210 is parallel to a radial direction of the column body 100; the catalyst is mounted on each push-pull frame 210, and is used for catalyzing a chemical reaction in the column; the inlet and outlet 101 corresponding to each push-pull frame 210 is arranged on a side wall of the column body 100, and is used for the push-pull frame 210 to slide in and out of the column.

[0063] In this embodiment, the tower body 100 is internally provided with a limiting and sealing mechanism for limiting the sliding distance of the push-pull frame 210 and achieving sealing isolation when the push-pull frame 210 slides out; the limiting and sealing mechanism includes baffles 130 located on both sides of the push-pull frame 210 and a top plate 140 located above the push-pull frame 210; the top plate 140 is obliquely arranged, with one end close to the heat exchange device 200 being relatively low in height and provided with a downwardly bent abutting portion 141; a butt plate 211 is vertically installed on one end of the push-pull frame 210 close to the heat exchange device 200, and the butt plate 211 is located on the side of the abutting portion 141 close to the heat exchange device 200.

[0064] When the catalyst needs to be replaced, the operator slides the push-pull frame 210 outwards through the inlet and outlet 101; after the push-pull frame 210 slides out for a certain distance, the butt plate 211 abuts against the abutting portion 141 of the top plate 140 to form a sealed contact; at this time, under the cooperation of the baffles 130 and the top plate 140, the space where the push-pull frame 210 is located is isolated from the internal space of the tower body 100, thereby achieving safe replacement of the catalyst without stopping the machine; after the replacement is completed, the push-pull frame 210 is pushed back to the original position, the butt plate 211 is separated from the abutting portion 141, and the tower body returns to normal operation.

[0065] In a preferred embodiment, the heat exchange device 200 includes a square cross-section shell and a heat exchange pipeline located inside the shell; the heat exchange pipeline is arranged in the form of a coil inside the shell, and two ends thereof are connected with the reboiler 110 respectively to form a circulation; the shell is a closed structure, and a heat-conducting medium is further filled inside.

[0066] In this embodiment, the heat exchange device 200 includes a square cross-section shell and a heat exchange pipeline located inside the shell. The shell constitutes the main external structure of the heat exchange device 200.

[0067] In this embodiment, the heat exchange pipeline is arranged in the form of a coil inside the internal space of the shell, and the effective heat transfer area can be significantly increased through this coil structure; the heat exchange pipeline has two ports, and the two ports are connected with the reboiler 110 at the bottom of the tower body 100 respectively, thereby forming a complete closed circulation loop starting from the reboiler 110, flowing through the heat exchange pipeline, and returning to the reboiler 110.

[0068] In this embodiment, the shell is constructed as a completely closed structure, and the internal cavity thereof is sealed after the installation of the heat exchange pipeline; in the sealed cavity, a specific type of heat-conducting medium is filled; the heat-conducting medium tightly surrounds the coiled heat exchange pipeline, and its function is to efficiently absorb the reaction heat released by the reaction section in the tower and transfer the heat to the working medium circulating inside the heat exchange pipeline, so as to finally realize the transfer and recycling of the reaction heat to the reboiler 110.

[0069] In a preferred embodiment, the shell and the tower body 100 are connected by the baffles 130; the number of the baffles 130 includes multiple, two as a group, respectively located on both sides of the push-pull frame 210 and parallel to each other; the two baffles 130 of the same group are correspondingly installed at the two corners on the same side of the shell, and one end is fixedly connected with the tower body 100.

[0070] In this embodiment, the shell of the heat exchange device 200 and the tower body 100 are connected and fixed by the baffles 130; the number of the baffles 130 includes multiple, which are arranged in the form of two as a group; the two baffles 130 of each group are parallel to each other and respectively located on both sides of the push-pull frame 210, thereby providing guidance for the sliding of the push-pull frame 210 and forming lateral sealing.

[0071] In this embodiment, in terms of connection mode, one end of the two baffles 130 of the same group is correspondingly installed at the two corners on the same side of the shell, which makes the baffles 130 fully utilize the geometric characteristics of the square cross section of the shell, and realizes stable and reliable connection; the other end of the baffle 130 is fixedly connected with the inner wall of the tower body 100, thereby stably supporting and positioning the entire heat exchange device 200 in the inner central region of the tower body 100.

[0072] In a preferred embodiment, the push-pull frame 210 is slidably installed on the support frame; the support frame is located between the two baffles 130 of the same group, and is fixedly connected with the baffles 130, the tower body 100 and the shell; the support frame is located below the push-pull frame 210, and is provided with a sliding groove extending in the radial direction of the tower body 100; the bottom of the push-pull frame 210 is provided with a matching guide wheel corresponding to the sliding groove.

[0073] In this embodiment, the push-pull frame 210 is slidably installed on the support frame; the support frame is arranged between the two baffles 130 of the same group located on both sides of the push-pull frame 210, and is fixedly connected with the two baffles 130, the inner wall of the tower body 100 and the shell of the heat exchange device 200, thereby forming a stable support structure.

[0074] In this embodiment, the support frame is specifically located below the push-pull frame 210, and is provided with a sliding groove extending in the radial direction of the tower body 100 on the upper portion; the sliding groove provides accurate guidance for the in-out movement of the push-pull frame 210.

[0075] Correspondingly, a guide wheel matched with the sliding groove is arranged at the bottom of the push-pull frame 210; through the cooperation of the guide wheel and the sliding groove, the push-pull frame 210 can stably slide along the radial direction of the tower body 100, which can slide outwards to replace the catalyst, and can also reset to the working position inwards.

[0076] In a preferred embodiment, the width of the abutment plate 211 matches the distance between the corresponding two baffles 130, for forming a horizontal seal; the height of the abutment plate 211 matches the height of the abutment portion 141, for forming a vertical seal.

[0077] In this embodiment, the push-pull frame 210 is provided with an abutment plate 211 at one end close to the heat exchange device 200; the abutment plate 211 matches the distance between the corresponding two baffles 130 in the width dimension; when the push-pull frame 210 slides inward to the working position, the width of the abutment plate 211 enables its two side edges to tightly fit the inner side surfaces of the two baffles 130, thereby forming an effective horizontal seal to prevent fluid leakage from the two sides of the push-pull frame 210.

[0078] In this embodiment, the abutment plate 211 matches the height of the abutment portion 141 at the end of the top plate 140 in the height dimension; when the push-pull frame 210 slides outward to the preset replacement position, the upper edge of the abutment plate 211 can be in full contact with the lower surface of the downwardly bent abutment portion 141, thereby forming a reliable vertical seal.

[0079] Through the above-mentioned matching design in both width and height dimensions, the abutment plate 211, together with the baffles 130 and the abutment portion 141, constitutes a complete sealing system, which ensures that the operating space where the push-pull frame 210 is located can be completely isolated from the main reaction space of the tower body 100 during catalyst replacement, thereby realizing safe non-stop operation.

[0080] In a preferred embodiment, the baffles 130 away from the side of the push-pull frame 210 are further provided with connecting plates 131 between the adjacent baffles 130; the connecting plates 131 are respectively located at the upper and lower ends of the baffles 130 and connected with the tower body 100 to form a sealed cavity.

[0081] In this embodiment, the baffles 130 away from the side of the push-pull frame 210, i.e. in the region facing away from the sliding channel of the push-pull frame, are provided with connecting plates 131 between the adjacent baffles 130; these connecting plates 131 are respectively located at the upper and lower ends of the baffles 130 and fixedly connected with the edges of the baffles 130.

[0082] In this embodiment, the connecting plates 131 are simultaneously connected with the inner wall of the tower body 100, and through this arrangement, a closed sealed cavity structure is formed by the two adjacent baffles 130, the upper and lower connecting plates 131, and the inner wall of the tower body 100.

[0083] In a preferred embodiment, the two ends of the sealed cavity are connected with the reboiler 110 respectively to form a circulation; the side of the two baffles 130 close to each other is further provided with a baffle 132; the number of the baffle 132 includes multiple, which are parallel to the connecting plate 131 and staggered arranged.

[0084] In the embodiment, the two ends of the sealed cavity are connected with the reboiler 110 respectively through pipelines to form an independent circulation loop; this design enables the heat conducting medium to continuously circulate between the sealed cavity and the reboiler 110, effectively strengthening the heat transfer and distribution in the tower body.

[0085] In the embodiment, multiple baffles 132 are arranged on the side of the two baffles 130 close to each other, i.e. the side facing the push-pull frame 210; the arrangement direction of the baffles 132 is parallel to the connecting plate 131, but the spatial arrangement is staggered.

[0086] Through the above arrangement, the baffles 132 form a tortuous flow channel inside the sealed cavity, increasing the path length of fluid flow and effectively promoting the heat exchange efficiency; this structure not only strengthens the heat transfer process, but also helps to maintain the uniform distribution of the temperature field in the tower body, thereby improving the stability and efficiency of the overall reaction rectification process.

[0087] In a preferred embodiment, the top plate 140 is further provided with a horizontal part at the end away from the abutting part 141, and is connected with the tower body 100 through the horizontal part; the horizontal part is provided with uniformly arranged through holes in the circumferential direction, and the top is provided with a slide plate 150 which can slide relatively; the distance between the through holes and the arms in the tower body 100 is the same, for the gas phase below to pass through; the slide plate 150 is arc-shaped, and the two ends are connected with the tower body 100 through hydraulic cylinders 151 respectively to control the opening and closing of the through holes.

[0088] In the embodiment, the top plate 140 is provided with a horizontal part at the end away from the abutting part 141, which is fixedly connected with the inner wall of the tower body 100 to form a stable connection structure; multiple uniformly distributed through holes are arranged on the horizontal part along the circumferential direction of the tower body 100, and the distance between the opening position of the through holes and the inner wall of the tower body 100 is consistent, so that the gas phase below the tower body can flow upwards uniformly through these holes.

[0089] In the embodiment, the top of the horizontal part is provided with a slide plate 150 which can slide relatively, and the slide plate 150 controls the opening and closing of the through holes by sliding radially.

[0090] Specifically, the sliding plate 150 is driven by the hydraulic cylinder 151 and can slide back and forth along the radial direction of the tower body 100. When the sliding plate 150 slides inward, the arc-shaped plate surface gradually covers the through holes on the horizontal part, reducing the ventilation area; when the sliding plate 150 slides outward, the through holes are gradually exposed, increasing the ventilation area.

[0091] This structure ensures that the independent operation space where the push-pull frame 210 is located is completely isolated from the main reaction space of the tower body 100 during catalyst replacement, effectively preventing the gas phase in the tower from entering the replacement area, ensuring operation safety and achieving truly non-stop catalyst replacement.

[0092] In a preferred embodiment, the cylinder body of the hydraulic cylinder 151 is fixedly installed outside the tower body 100 and connected with the sliding plate 150 through a piston rod; the piston rod penetrates the side wall of the tower body 100 and is connected with the sliding plate 150 through a hinge shaft; the sliding plate 150 is provided with a C-shaped mounting groove on the side close to the tower body 100, corresponding to the piston rod; the hinge shaft extends in the vertical direction and penetrates the sliding plate 150 and the piston rod respectively, forming a hinge connection.

[0093] In this embodiment, the cylinder body of the hydraulic cylinder 151 is fixedly installed outside the tower body 100, and the piston rod extends inward and penetrates the side wall of the tower body 100 to connect with the sliding plate 150 inside; this external installation method facilitates the maintenance and repair of the hydraulic cylinder 151, and at the same time avoids the influence of the high-temperature corrosive environment on the working performance of the hydraulic cylinder 151.

[0094] In this embodiment, the end of the piston rod is connected with the sliding plate 150 through a hinge shaft in the connecting structure.

[0095] Specifically, a C-shaped mounting groove is provided on the side of the sliding plate 150 close to the tower body 100, which provides a mounting space for the hinge connection; the hinge shaft extends in the vertical direction and penetrates the mounting groove of the sliding plate 150 and the end of the piston rod in sequence, forming a reliable hinge connection.

[0096] This hinge structure allows the sliding plate 150 to adaptively adjust its position during radial sliding, ensuring close contact with the surface of the horizontal part, while compensating for possible installation errors or thermal deformation, ensuring the accuracy of the through-hole on-off control and the sealing reliability; the part of the piston rod penetrating the side wall of the tower body 100 is provided with appropriate sealing structure to ensure that the pressure in the tower remains stable.

[0097] In a preferred embodiment, the tower body 100 is further provided with a cover 160 corresponding to the inlet and outlet 101 on the outside; the cover 160 is detachably connected with the tower body 100 through bolts to control the on-off of the inlet and outlet 101.

[0098] In the embodiment, the cover 160 is detachably connected to the outer wall of the tower body 100 by a plurality of bolts, thereby forming a reliable mechanical seal.

[0099] In the embodiment, the cover 160 is also detachably connected to the push-pull frame 210 by a first bolt, and a specially designed pin hole is further arranged on the push-pull frame 210, which is used to fix the position of the push-pull frame during catalyst replacement. When catalyst replacement is needed, the operator first detaches the bolts connecting the cover 160 to the tower body 100, and hoists the cover 160 to a designated position. At this time, the abutting plate 211 at the end of the push-pull frame 210 is in complete abutment with the abutment part 141 of the top plate 140, thereby forming an effective seal.

[0100] Subsequently, the pin is passed through the pin hole on the push-pull frame 210 and fixed to the tower body 100, thereby ensuring that the push-pull frame 210 remains stable during catalyst replacement. After the above fixing is completed, the first bolt connecting the cover 160 to the push-pull frame 210 is detached, and the cover 160 is completely removed. At this time, catalyst replacement operation can be directly performed.

[0101] The principles and implementation manners of the present application are described by using specific examples in the present text, and the above examples are only used to help understand the method of the present application and its core idea. The above description is only the preferred implementation manner of the present application. It should be noted that, due to the limited nature of the language expression, there are infinite specific structures in the objective world. For ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, or the above technical features can be combined in an appropriate manner. These improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A reactive distillation column, characterized in that, include: The column body (100) extends vertically and is provided with a reboiler (110) and a condenser (120) at both ends, and includes a stripping section, a reaction section and a rectification section inside; The reaction section is located between the stripping section and the rectification section, and includes a heat exchange device (200) coaxial with the column body (100) and a push-pull frame (210) arranged around the heat exchange device (200). The heat exchange device (200) is connected to the reboiler (110) for recovering and utilizing the heat of reaction; The push-pull bracket (210) is slidably mounted on the tower body (100), and the sliding direction is parallel to the radial direction of the tower body (100), for mounting the catalyst; The tower body (100) has an inlet and outlet (101) on its side wall for the push-pull frame (210) to pass through, and a limiting sealing mechanism is provided inside to limit the sliding distance of the push-pull frame (210). The limiting sealing mechanism includes baffles (130) located on both sides of the push-pull frame (210) and a top plate (140) located above the push-pull frame (210). The top plate (140) is inclined, and the height of the end near the heat exchange device (200) is relatively low and it is provided with a downwardly bent abutment part (141). The push-pull bracket (210) has a butt plate (211) at one end near the heat exchange device (200) corresponding to the abutting part (141), which is used to abut and seal with the abutting part (141); The docking plate (211) is vertically mounted on the push-pull frame (210) and is located on the side of the abutment portion (141) that is relatively close to the heat exchange device (200); When the catalyst needs to be replaced, the operator slides the push-pull bracket (210) outward through the inlet and outlet (101); after the push-pull bracket (210) slides out a certain distance, the docking plate (211) and the abutting part (141) of the top plate (140) abut together to form a sealed contact; at this time, with the cooperation of the baffle (130) and the top plate (140), the space where the push-pull bracket (210) is located is isolated from the internal space of the tower body (100).

2. The reactive distillation column according to claim 1, characterized in that, The heat exchange device (200) includes a shell with a square cross-section and heat exchange pipes located inside the shell; The heat exchange pipe is coiled inside the shell, and its two ends are respectively connected to the reboiler (110) to form a circulation; The shell is a closed structure and is filled with a heat-conducting medium.

3. The reactive distillation column according to claim 2, characterized in that, The shell and the tower body (100) are connected by the baffle (130); The number of baffles (130) includes multiple baffles, two in a group, located on both sides of the push-pull frame (210) and parallel to each other; Two baffles (130) in the same group are installed at one end at two corners on the same side of the shell, and the other end is fixedly connected to the tower body (100).

4. The reactive distillation column according to claim 3, characterized in that, The push-pull bracket (210) can be slidably mounted on the support frame; The support frame is located between the two baffles (130) in the same group, and is fixedly connected to the baffles (130), the tower body (100), and the shell. The support frame is located below the push-pull frame (210) and is provided with a sliding groove extending radially along the tower body (100); The bottom of the push-pull bracket (210) is provided with matching guide wheels corresponding to the slide groove.

5. The reactive distillation column according to claim 3, characterized in that, The width of the mating plate (211) matches the distance between the two corresponding baffles (130) to form a lateral seal; The height of the mating plate (211) matches the height of the abutting part (141) to form a vertical seal.

6. The reactive distillation column according to claim 3, characterized in that, The baffle (130) is located away from the push-pull frame (210), and a connecting plate (131) is provided between the baffle (130) and the adjacent baffle (130). The connecting plates (131) are located at the upper and lower ends of the baffle (130) and are connected to the tower body (100) to form a sealed cavity.

7. The reactive distillation column according to claim 6, characterized in that, The two ends of the sealed cavity are respectively connected to the reboiler (110) to form a circulation; A partition (132) is also provided on the side of the two baffles (130) in the same sealed cavity that are close to each other. The number of partitions (132) includes multiple ones, which are parallel to the connecting plate (131) and arranged in an alternating manner.

8. The reactive distillation column according to claim 1, characterized in that, The top plate (140) is provided with a horizontal part at one end away from the abutment part (141), and is connected to the tower body (100) through the horizontal part; The horizontal part has evenly arranged through holes along the circumference, and the top is provided with a sliding plate (150) that can slide relative to each other. The distance between the through hole and the inner arm of the tower body (100) is the same, which is used to allow the gas phase below to pass through; The slide plate (150) is arc-shaped, and its two ends are connected to the tower body (100) by hydraulic cylinders (151) to control the opening and closing of the through hole.

9. The reactive distillation column according to claim 8, characterized in that, The cylinder body of the hydraulic cylinder (151) is fixedly installed on the outside of the tower body (100) and connected to the slide plate (150) through the piston rod; The piston rod passes through the side wall of the tower body (100) and is connected to the slide plate (150) via a hinge shaft; The sliding plate (150) is located on the side of the tower body (100) near the piston rod, and a C-shaped mounting groove is provided therefore. The hinge shaft extends vertically and passes through the slide plate (150) and the piston rod respectively, forming a hinge.

10. The reactive distillation column according to claim 9, characterized in that, The tower body (100) is also provided with a cover (160) on the outside corresponding to the inlet and outlet (101). The cover (160) is detachably connected to the tower body (100) by bolts and is used to control the opening and closing of the inlet and outlet (101).

Images