A built-in high-efficiency tube-row heat exchange device for large kettles

Abstract

The present invention discloses a built-in high-efficiency cylindrical heat exchange device for a large kettle, belonging to the technical field of reactors. A built-in high-efficiency cylindrical heat exchange device for a large kettle comprises a base and a reactor fixedly mounted on its surface. The built-in high-efficiency cylindrical heat exchange device for a large kettle has a spiral coil design for the upper coil and the lower coil, and the upper coil is connected to the annular riser through an upper connecting pipe, and the lower coil is connected to the annular riser through a lower connecting pipe. Then, by adding a heat exchange plate and an arc design of a vertical row tube heat exchanger, compared with the prior art, the cylindrical heat exchange device does not occupy the effective volume of the reactor, and increases the contact area with the material in the reactor, thereby improving the heat exchange effect. The vertical staggered arrangement of the annular riser between the upper coil and the lower coil, coupled with the movement of the stirring blade, improves the circulation of the material inside the reactor, so that the material inside the reactor is fully mixed.

Description

Technical Field

[0001] The invention relates to the technical field of reaction kettles, and more specifically to a built-in high-efficiency cylinder-row heat exchange device for large kettles. Background Art

[0002] Reactor is a container used for physical or chemical reactions. It is suitable for various chemical reactions under high temperature and pressure. Reactor is widely used in petroleum, chemical, rubber, pesticide, dye, medicine and food industries. It can complete the process of vulcanization, nitration, hydrogenation, hydrocarbonization, polymerization, condensation, etc. Its material is usually stainless steel, carbon steel, zirconium, nickel-based alloy, etc. It has the functions of heating, evaporation, cooling and low-speed mixing. When the reactor reacts, a heat exchange device is needed for heat exchange.

[0003] The existing large-scale reactors generally use horizontal spiral coil heat exchangers or vertical platoon heat exchangers. Horizontal spiral coil heat exchangers are generally made of multiple layers of horizontal coils. Due to their horizontal orientation, they will form a large resistance to axial stirring flow, thereby reducing the stirring effect. The vertical platoon heat exchanger is formed by multiple vertically arranged heat exchange tubes to form a single piece or a single group. The vertical platoon heat exchanger can also act as a stirring baffle to improve the stirring and mixing effect. However, when the reactor requires a large heat exchange area, the number of heat exchangers is increased to a certain level, exceeding the full baffle working condition, which will hinder the flow of materials and reduce the stirring effect. The existing horizontal spiral coil heat exchangers or vertical platoon heat exchangers usually increase the number of heat exchange tubes to make up for the heat exchange area, which will not only occupy the effective volume of the reactor, but also seriously affect the circulation of the medium in the reactor, and cannot overcome the problem of temperature difference between the upper and lower parts of the reactor. Summary of the invention

[0004] The purpose of the present invention is to provide a built-in high-efficiency tube-row heat exchange device for large kettles to solve the problems raised in the above background technology:

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A built-in high-efficiency cylinder-row heat exchange device for a large kettle, comprising a base and a reactor fixedly mounted on the surface thereof, and a rotatable stirring device is arranged inside the reactor, a spiral coil heat exchanger is fixedly mounted below the reactor, an upper coil and a lower coil are arranged inside the end and bottom of the spiral coil heat exchanger, a plurality of annular risers are arranged in a circular array between the upper coil and the lower coil, and two adjacent annular risers are connected to each other, a heat exchange disk is fixedly mounted on the surface of the annular riser, an upper interface and a lower interface are respectively opened on the end surface and the bottom surface of the heat exchange disk, and the upper interface and the lower interface are connected to the annular riser Two connecting rods are fixedly installed on the inner wall of the heat exchange plate, and the ends of the two connecting rods are fixedly connected to a mushroom plate. The head of the mushroom plate faces the upper interface. A plurality of upper connecting pipes are fixedly connected between the upper coil and the annular riser. The upper coil is connected to the annular riser through the upper connecting pipes. A plurality of lower connecting pipes are fixedly connected between the lower coil and the annular riser. The lower coil is connected to the annular riser through the lower connecting pipes. A plurality of vertical row tube heat exchangers are fixedly connected to the inner wall of the reactor. An arc guide plate is fixedly installed on the bottom end surface of any one of the vertical row tube heat exchangers. The shape of the vertical row tube heat exchanger is arc-shaped.

[0007] By adopting the above technical scheme, the upper coil and the lower coil are of spiral coil design, and the upper coil is connected with the annular riser through the upper connecting pipe, and the lower coil is connected with the annular riser through the lower connecting pipe. Then, by adding a heat exchange plate, a spiral coil heat exchanger is formed as a whole. In addition, the arc design of the vertical row tube heat exchanger is combined with the spiral coil heat exchanger and the vertical row tube heat exchanger in the reactor to form a cylindrical row heat exchange device. Compared with the prior art, the cylindrical row heat exchange device does not occupy the effective volume of the reactor, but increases the contact area with the material in the reactor, thereby improving the heat exchange effect. The vertical staggered arrangement of the annular riser between the upper coil and the lower coil, coupled with the movement of the stirring blades, improves the circulation of materials inside the reactor.

[0008] Preferably, the spiral coil heat exchanger and the inner bottom surface of the reactor are fixedly connected by a fixing rod, the spiral coil heat exchanger is fixedly connected to the reactor through the fixing rod, the height of the spiral coil heat exchanger does not exceed one half of the height of the reactor cylinder, and the diameters of the upper coil, lower coil, annular riser, upper connecting pipe, and lower connecting pipe are the same.

[0009] By adopting the above technical scheme, the upper coil and the lower coil are spirally coiled, and combined with the stirring device, a certain stirring and diversion effect is achieved. The upper coil is connected to the annular riser through the upper connecting pipe, and the lower coil is connected to the annular riser through the lower connecting pipe. Compared with the traditional rotary coil type, the circulation time of the heat exchange medium is reduced and the heat exchange effect is improved. In addition, the inlet temperature of the heat exchange medium is regulated, so the temperature difference in the kettle can be accurately controlled, thus overcoming the problem of large temperature difference between the upper and lower parts of large reactors.

[0010] Preferably, the ends of the upper coil and the lower coil are fixedly connected with an inlet pipe and an outlet pipe respectively, and the surface of the reactor is fixedly connected with an inlet connector and an outlet connector which are in communication with the inlet pipe and the outlet pipe respectively.

[0011] Preferably, a fixing frame is fixedly connected between the surface of the vertical row tube heat exchanger and the inner wall of the reactor, the vertical row tube heat exchanger is fixedly connected to the reactor through the fixing frame, an upper inlet pipe is fixedly installed on the end surface of the vertical row tube heat exchanger, an inlet pipe connector connected to the upper inlet pipe is fixedly installed on the top surface of the reactor, a lower row tube is fixedly installed on the bottom surface of the reactor, and one end of the lower row tube passes through the reactor and is connected to the bottom end of the vertical row tube heat exchanger.

[0012] Preferably, the number of the lower row tubes and the inlet tube connectors is the same as the number of the vertical row tube heat exchangers, and the inlet tube connectors, the upper inlet tubes, the vertical row tube heat exchanger and the lower row tubes are connected.

[0013] Preferably, the stirring device comprises a rotating shaft and stirring blades, and the stirring blades are fixedly mounted on the surface of the rotating shaft.

[0014] Preferably, a stand is fixedly mounted on the top surface of the reactor, a mounting plate is fixedly mounted on the end surface of the stand, a motor is fixedly mounted on the surface of the mounting plate, and an output end of the motor is fixedly connected to a rotating shaft.

[0015] By adopting the above technical scheme, the material at the bottom is diffused outward through the gaps between the annular risers under the action of stirring. When the material contacts the vertical row tube heat exchanger, the vertical row tube heat exchanger acts as a stirring baffle to fully mix the material. When the material contacts the arc guide plate, the material rises upward along the arc guide plate, forcing the material to mix with the solution in the reactor, and then flow upward to be baffled and enter the spiral coil heat exchanger again for stirring and mixing. During the baffle process, it is fully integrated with oxygen, which improves the oxygen dissolving effect of the material, thereby improving the yield and conversion rate of the fermentation product.

[0016] Preferably, a heat exchange driving device 1 is arranged outside the reactor, a heat exchange medium is arranged inside the heat exchange driving device 1, and the inlet and outlet of the heat exchange driving device 1 are respectively connected to the inlet connector and the outlet connector.

[0017] Preferably, a second heat exchange driving device is further provided outside the reactor, a heat exchange medium is provided inside the second heat exchange driving device, and the inlet and outlet of the second heat exchange driving device are respectively connected to the inlet pipe connector and the lower discharge pipe.

[0018] Preferably, a feeding port is fixedly installed on the end surface of the reaction kettle, a discharge port is fixedly connected to the bottom surface of the reaction kettle, and a valve is provided on the surface of the discharge port.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) When the built-in high-efficiency tube-row heat exchange device for large-scale reactors is in use, the upper coil and the lower coil are of spiral coil design, and the upper coil is connected to the annular riser through the upper connecting pipe, and the lower coil is connected to the annular riser through the lower connecting pipe. Then, by adding a heat exchange plate, a spiral coil heat exchanger is formed as a whole. In addition, the arc design of the vertical tube heat exchanger is added. The spiral coil heat exchanger and the vertical tube heat exchanger in the reactor cooperate to form a tube-row heat exchange device. Compared with the prior art, the tube-row heat exchange device does not occupy the effective volume of the reactor, but increases the contact area with the material in the reactor, thereby improving the heat exchange effect. The vertical staggered arrangement of the annular riser between the upper coil and the lower coil, coupled with the movement of the stirring blades, improves the circulation of the material inside the reactor, so that the material inside the reactor is fully mixed.

[0021] 2) When the built-in high-efficiency cylindrical heat exchange device for large reactors is in use, the upper and lower coils are designed in a spiral coil style, and combined with a stirring device, it plays a certain stirring and diversion role. The upper coil is connected to the annular riser through the upper connecting pipe, and the lower coil is connected to the annular riser through the lower connecting pipe. Compared with the traditional rotating coil type, it reduces the circulation time of the heat exchange medium and improves the heat exchange effect. In addition, the inlet temperature of the heat exchange medium can be regulated to accurately control the temperature difference in the reactor, thus overcoming the problem of large temperature difference between the upper and lower parts of large reactors.

[0022] 3) When the built-in high-efficiency tube-type heat exchanger for this large kettle is in use, the material at the bottom diffuses outward through the gaps between the annular vertical tubes under the action of stirring. When the material contacts the vertical tube heat exchanger, the vertical tube heat exchanger acts as a stirring baffle to fully mix the material. When the material contacts the arc guide plate, the material rises upward along the arc guide plate, forcing the material to mix with the solution in the reactor, and then flow upward to be baffled and enter the spiral coil heat exchanger again for stirring and mixing. During the baffle process, it is fully integrated with oxygen, which improves the dissolved oxygen effect of the material, thereby improving the yield and conversion rate of the fermentation product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the position structure of the stirring device and the spiral coil heat exchanger of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall structure of the spiral coil heat exchanger of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the heat exchange disk of the present invention;

[0027] Figure 5 It is a schematic diagram of the position structure of the mushroom plate and the heat exchange plate of the present invention;

[0028] Figure 6 It is a schematic structural diagram of a vertical row tube heat exchanger of the present invention;

[0029] Figure 7 It is a schematic diagram of the position structure of the spiral coil heat exchanger and the vertical row tube heat exchanger of the present invention.

[0030] Explanation of the numbers in the figure: 1. Base; 2. Reactor; 3. Stirring device; 4. Spiral coil heat exchanger; 5. Upper coil; 6. Lower coil; 7. Annular riser; 8. Heat exchange plate; 9. Upper interface; 10. Lower interface; 11. Mushroom plate; 12. Connecting rod; 13. Upper connecting pipe; 14. Lower connecting pipe; 15. Vertical row tube heat exchanger; 16. Arc guide plate; 17. Fixing rod; 18. Inlet pipe; 19. Outlet pipe; 20. Inlet connector; 21. Outlet connector; 22. Fixing frame; 23. Upper inlet pipe; 24. Lower discharge pipe; 25. Inlet pipe connector; 26. Rotating shaft; 27. Stirring blade; 28. Stand; 29. ​​Mounting plate; 30. Motor; 31. Feeding port; 32. Discharge port; 33. Valve. DETAILED DESCRIPTION

[0031] Example 1

[0032] See also Figures 1 to 7A built-in high-efficiency cylinder-row heat exchange device for a large kettle comprises a base 1 and a reactor 2 fixedly mounted on the surface thereof. The reactor 2 is a conventional large kettle in the prior art, and a rotatable stirring device 3 is arranged inside the reactor 2. The stirring device 3 is a conventional stirrer in the prior art. A spiral coil heat exchanger 4 is fixedly installed at the bottom of the reactor 2. Under the action of the stirring device 3, the spiral coil heat exchanger 4 not only achieves a diversion effect, but also enables the material to be fully integrated. An upper coil 5 and a lower coil 6 are arranged inside the end and bottom of the spiral coil heat exchanger 4. The upper coil 5 and the lower coil 6 adopt a spiral coil design to play the role of a stirring and diversion cylinder. The upper coil 5 and the lower coil 6 There are several annular risers 7 in the circular array. The design of the annular risers 7 reduces the circulation time of the heat exchange medium and improves the heat exchange effect. The two adjacent annular risers 7 are connected to each other. A heat exchange plate 8 is fixedly installed on the surface of the annular riser 7. The heat exchange plate 8 increases the heat exchange area and thus increases the heat exchange effect. The end surface and bottom surface of the heat exchange plate 8 are respectively provided with an upper interface 9 and a lower interface 10. The upper interface 9 and the lower interface 10 are connected to the annular riser 7. Two connecting rods 12 are fixedly installed on the inner wall of the heat exchange plate 8. The ends of the two connecting rods 12 are fixedly connected with a mushroom plate 11. The mushroom plate 11 allows the heat exchange medium to diffuse to the surroundings and directly contact the surface of the heat exchange plate 8. The mushroom plate 1 1 is directed toward the upper interface 9, a plurality of upper connecting pipes 13 are fixedly connected between the upper coil 5 and the annular riser 7, the upper coil 5 is communicated with the annular riser 7 through the upper connecting pipes 13, a plurality of lower connecting pipes 14 are fixedly connected between the lower coil 6 and the annular riser 7, the lower coil 6 is communicated with the annular riser 7 through the lower connecting pipes 14, a plurality of vertical calandria heat exchangers 15 are correspondingly fixedly connected to the inner wall of the reactor 2, an arc guide plate 16 is fixedly installed on the bottom end surface of any vertical calandria heat exchanger 15, the shape of the vertical calandria heat exchanger 15 is arc-shaped, the arc-shaped vertical calandria heat exchanger 15 increases the heat exchange area with the material, thereby improving the heat exchange effect, the upper coil 5 and the lower coil 6 are spiral coil designs, and the upper coil 5 is connected with the annular riser 7 through the upper connecting pipe 13, and the lower coil 6 is connected with the annular riser 7 through the lower connecting pipe 14. Then, by adding the heat exchange plate 8, a spiral coil heat exchanger 4 is formed as a whole. In addition, the arc-shaped design of the vertical row tube heat exchanger 15 is added. The spiral coil heat exchanger 4 and the vertical row tube heat exchanger 15 in the reactor 2 cooperate to form a cylindrical row heat exchange device. Compared with the prior art, the cylindrical row heat exchange device does not occupy the effective volume of the reactor 2, and increases the contact area with the material in the reactor 2, thereby improving the heat exchange effect. The annular riser 7 between the upper coil 5 and the lower coil 6 is vertically staggered, and the movement of the stirring blade 27 improves the circulation of the material inside the reactor 2.

[0033] A fixing rod 17 is fixedly connected between the spiral coil heat exchanger 4 and the inner bottom surface of the reactor 2. The spiral coil heat exchanger 4 is fixedly connected to the reactor 2 through the fixing rod 17. The height of the spiral coil heat exchanger 4 does not exceed one half of the height of the reactor 2 cylinder. The diameters of the upper coil 5, the lower coil 6, the annular riser 7, the upper connecting pipe 13, and the lower connecting pipe 14 are the same. The spiral coil design of the upper coil 5 and the lower coil 6, combined with the stirring device 3, plays a certain stirring and diverting role. The upper coil 5 is connected to the annular riser 7 through the upper connecting pipe 13, and the lower coil 6 is connected to the annular riser 7 through the lower connecting pipe 14. Compared with the traditional rotary coil type, the circulation time of the heat exchange medium is reduced, the heat exchange effect is improved, and the inlet temperature of the heat exchange medium is regulated, so the temperature difference in the reactor can be accurately controlled, overcoming the problem of large temperature difference between the upper and lower parts of the large reactor 2.

[0034] The ends of the upper coil 5 and the lower coil 6 are fixedly connected with an inlet pipe 18 and an outlet pipe 19 respectively, and the surface of the reactor 2 is fixedly connected with an inlet connector 20 and an outlet connector 21 which are connected with the inlet pipe 18 and the outlet pipe 19 respectively.

[0035] A fixing frame 22 is fixedly connected between the surface of the vertical tube heat exchanger 15 and the inner wall of the reactor 2. The vertical tube heat exchanger 15 is fixedly connected to the reactor 2 through the fixing frame 22. An upper inlet pipe 23 is fixedly installed on the end surface of the vertical tube heat exchanger 15. An inlet pipe connector 25 connected to the upper inlet pipe 23 is fixedly installed on the top surface of the reactor 2. A lower tube 24 is fixedly installed on the bottom surface of the reactor 2. One end of the lower tube 24 passes through the reactor 2 and is connected to the bottom end of the vertical tube heat exchanger 15.

[0036] The number of the lower row tubes 24 and the inlet tube connectors 25 is the same as the number of the vertical row tube heat exchangers 15 , and the inlet tube connectors 25 , the upper inlet tubes 23 , the vertical row tube heat exchangers 15 and the lower row tubes 24 are connected.

[0037] The stirring device 3 comprises a rotating shaft 26 and stirring blades 27. The stirring blades 27 are fixedly mounted on the surface of the rotating shaft 26. The stirring device 3 fully stirs the substance and the solution, and the solution has a certain oxygen content.

[0038] A stand 28 is fixedly mounted on the top surface of the reactor 2, a mounting plate 29 is fixedly mounted on the end surface of the stand 28, a motor 30 is fixedly mounted on the surface of the mounting plate 29, an output end of the motor 30 is fixedly connected to the rotating shaft 26, the motor 30 is a conventional electric motor in the prior art, and the material at the bottom diffuses outward through the gap between the annular standpipes 7 under the action of stirring, and when the material contacts the vertical row tube heat exchanger 15, the vertical row tube heat exchanger 15 acts as a stirring baffle to fully mix the material, and when the material contacts the arc guide plate 16, the material rises upward along with the arc guide plate 16, forcing the material to mix with the solution in the reactor 2, and then flow upward to be baffled and enter the interior of the spiral coil heat exchanger 4 again for stirring and mixing, and fully merge with oxygen during the baffle process, thereby improving the oxygen dissolving effect of the material, thereby improving the yield and conversion rate of the fermentation product.

[0039] A heat exchange drive device 1 is arranged outside the reactor 2, and a heat exchange medium is arranged inside the heat exchange drive device 1. The inlet and outlet of the heat exchange drive device 1 are respectively connected with the inlet connector 20 and the outlet connector 21. The heat exchange drive device 1 is a conventional heat exchange drive device 1 in the prior art, and a temperature controller is arranged at the inlet of the heat exchange drive device 1, which is a conventional temperature control device in the prior art.

[0040] A heat exchange drive device 2 is also provided outside the reactor 2, and a heat exchange medium is provided inside the heat exchange drive device 2. The inlet and outlet of the heat exchange drive device 2 are respectively connected to the inlet pipe connector 25 and the lower discharge pipe 24. The heat drive device 2 is a conventional heat drive device 2 in the prior art, and a temperature controller is provided at the inlet of the heat exchange drive device 2.

[0041] A feed port 31 is fixedly installed on the end surface of the reactor 2, and a discharge port 32 is fixedly connected to the bottom surface of the reactor 2. A valve 33 is provided on the surface of the discharge port 32. The discharge port 32 is used to discharge the reacted substances.

[0042] The use steps of the present invention are as follows: when the built-in high-efficiency cylindrical row heat exchange device for the large kettle is in use, during the reaction process inside the reactor 2, the reactor 2 needs to be heat exchanged. At this time, the heat exchange driving device 1 and the heat exchange driving device 2 work simultaneously. The heat exchange driving device 1 flows the heat exchange medium into the inlet connector 20, enters the upper coil 5 through the inlet pipe 18, and then enters the annular riser 7 through multiple upper connecting pipes 13. At this time, the heat exchange medium flowing into the annular riser 7 enters from the upper interface 9, and under the action of the mushroom plate 11, the heat exchange medium diffuses to the surroundings, and then contacts the inner wall of the heat exchange plate 8, and then enters the annular riser 7 through the lower interface 10. As the heat exchange medium continues to move, it passes through multiple lower connecting pipes 14 and enters the lower coil 6 The heat exchange medium flows into the inlet pipe connector 25 of the heat exchange driving device 2, enters the vertical tube heat exchanger 15 through the upper inlet pipe 23, and finally enters the heat exchange driving device 2 through the lower tube 24. When the reaction is inside the reactor 2, the motor 30 rotates counterclockwise to rotate the shaft 26 and the stirring blade 27, thereby fully stirring the material inside the reactor 2. Under the action of stirring, the material at the bottom diffuses outward through the gap between the annular vertical pipes 7. When the material contacts the vertical tube heat exchanger 15, the vertical tube heat exchanger 15 acts as a stirring baffle to fully mix the material. When the material contacts the arc guide plate 16, the material moves upward along the arc guide plate 16. The material is forced to rise, and after being mixed with the solution in the reactor 2, it flows upward at the same time to be bended and enter the spiral coil heat exchanger 4 again for stirring and mixing. After the reaction in the reactor 2 is completed, the valve 33 is opened to discharge the material in the reactor 2. The upper coil 5 and the lower coil 6 of this scheme are spiral coil designs, and the upper coil 5 is connected with the annular riser 7 through the upper connecting pipe 13, and the lower coil 6 is connected with the annular riser 7 through the lower connecting pipe 14. Then, by adding a heat exchange disk 8, a spiral coil heat exchanger 4 is formed as a whole, and the arc design of the vertical row tube heat exchanger 15 is added. The spiral coil heat exchanger 4 and the vertical row tube heat exchanger 15 in the reactor 2 cooperate to form a cylindrical row heat exchange device. Compared with the prior art, the cylindrical row heat exchange device does not occupy the reactor 2, the contact area with the material in the reactor 2 is increased, thereby improving the heat exchange effect. The annular riser 7 between the upper coil 5 and the lower coil 6 is vertically staggered, and the movement of the stirring blade 27 improves the circulation of the material inside the reactor 2; the upper coil 5 and the lower coil 6 are designed in a spiral coil type, and the stirring device 3 is combined to play a certain stirring and guiding role. The upper coil 5 is connected to the annular riser 7 through the upper connecting pipe 13, and the lower coil 6 is connected to the annular riser 7 through the lower connecting pipe 14. Compared with the traditional rotary coil type, the circulation time of the heat exchange medium is reduced, the heat exchange effect is improved, and the inlet temperature of the heat exchange medium is regulated, so that the temperature difference in the reactor can be accurately controlled, and the problem of large temperature difference between the upper and lower parts of the large reactor 2 is overcome;Under the action of stirring, the material at the bottom diffuses outward through the gap between the annular vertical pipes 7. When the material contacts the vertical calandria heat exchanger 15, the vertical calandria heat exchanger 15 acts as a stirring baffle to fully mix the material. When the material contacts the arc guide plate 16, the material rises upward along the arc guide plate 16, forcing the material to mix with the solution in the reactor 2, and then flows upward to be baffled and enter the spiral coil heat exchanger 4 again for stirring and mixing. During the baffle process, it is fully integrated with oxygen, which improves the oxygen dissolving effect of the material, thereby improving the yield and conversion rate of the fermentation product. ;

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency cylindrical heat exchange device for a large kettle, comprising a base (1) and a reactor (2) fixedly mounted on the surface of the base, and a rotatable stirring device (3) is arranged inside the reactor (2), characterized in that: A spiral coil heat exchanger (4) is fixedly installed at the bottom of the reactor (2). An upper coil (5) and a lower coil (6) are arranged at the end and bottom of the spiral coil heat exchanger (4). A plurality of annular risers (7) are arranged in a circular array between the upper coil (5) and the lower coil (6), and two adjacent annular risers (7) are connected to each other. A heat exchange disk (8) is fixedly installed on the surface of the annular riser (7). An upper interface (9) and a lower interface (10) are respectively provided on the end surface and the bottom surface of the heat exchange disk (8). The upper interface (9) and the lower interface (10) are connected to the annular riser (7). Two connecting rods (12) are fixedly installed on the inner wall of the heat exchange disk (8). The ends of the two connecting rods (12) are fixedly connected to a mushroom disk (11). The mushroom disk (11) is fixedly connected to the inner wall of the heat exchange disk (8). The head faces the upper interface (9); a plurality of upper connecting pipes (13) are fixedly connected between the upper coil (5) and the annular vertical pipe (7); the upper coil (5) is connected to the annular vertical pipe (7) through the upper connecting pipes (13); a plurality of lower connecting pipes (14) are fixedly connected between the lower coil (6) and the annular vertical pipe (7); the lower coil (6) is connected to the annular vertical pipe (7) through the lower connecting pipes (14); a plurality of vertical caisson heat exchangers (15) are fixedly connected to the inner wall of the reactor (2); an arc-shaped guide plate (16) is fixedly mounted on the bottom end surface of any one of the vertical caisson heat exchangers (15); the vertical caisson heat exchanger (15) is in the shape of an arc; when the material contacts the arc-shaped guide plate (16), the material rises upward along with the arc-shaped guide plate (16), forcing the material to mix with the solution in the reactor (2).

2. According to claim 1, a large-scale kettle built-in high-efficiency tube-row heat exchange device is characterized in that: A fixing rod (17) is fixedly connected between the spiral coil heat exchanger (4) and the inner bottom surface of the reactor (2); the spiral coil heat exchanger (4) is fixedly connected to the reactor (2) via the fixing rod (17); the height of the spiral coil heat exchanger (4) does not exceed half the height of the reactor (2) cylinder; and the upper coil (5), the lower coil (6), the annular riser (7), the upper connecting pipe (13), and the lower connecting pipe (14) have the same diameter.

3. The built-in high-efficiency tube-row heat exchange device for a large kettle according to claim 1, characterized in that: The ends of the upper coil (5) and the lower coil (6) are respectively fixedly connected with an inlet pipe (18) and an outlet pipe (19), and the surface of the reaction kettle (2) is respectively fixedly connected with an inlet connector (20) and an outlet connector (21) which are in communication with the inlet pipe (18) and the outlet pipe (19).

4. The built-in high-efficiency tube-row heat exchange device for a large kettle according to claim 1, characterized in that: A fixing frame (22) is fixedly connected between the surface of the vertical calandria heat exchanger (15) and the inner wall of the reactor (2); the vertical calandria heat exchanger (15) is fixedly connected to the reactor (2) via the fixing frame (22); an upper inlet pipe (23) is fixedly mounted on the end surface of the vertical calandria heat exchanger (15); an inlet pipe connector (25) connected to the upper inlet pipe (23) is fixedly mounted on the top surface of the reactor (2); a lower row pipe (24) is fixedly mounted on the bottom surface of the reactor (2); one end of the lower row pipe (24) passes through the reactor (2) and is connected to the bottom end of the vertical calandria heat exchanger (15).

5. The built-in high-efficiency tube-row heat exchange device for large kettles according to claim 4, characterized in that: The number of the lower row tubes (24) and the inlet tube connectors (25) is the same as the number of the vertical row tube heat exchanger (15), and the inlet tube connectors (25), the upper inlet tubes (23), the vertical row tube heat exchanger (15) and the lower row tubes (24) are connected.

6. The built-in high-efficiency tube-row heat exchange device for a large kettle according to claim 1, characterized in that: The stirring device (3) comprises a rotating shaft (26) and a stirring blade (27), wherein the stirring blade (27) is fixedly mounted on the surface of the rotating shaft (26).

7. A built-in high-efficiency tube-row heat exchange device for a large kettle according to claim 6, characterized in that: A stand (28) is fixedly mounted on the top surface of the reaction kettle (2), a mounting plate (29) is fixedly mounted on the end surface of the stand (28), a motor (30) is fixedly mounted on the surface of the mounting plate (29), and an output end of the motor (30) is fixedly connected to the rotating shaft (26).

8. The built-in high-efficiency tube-row heat exchange device for a large kettle according to claim 3, characterized in that: A heat exchange drive device 1 is arranged outside the reaction kettle (2), a heat exchange medium is arranged inside the heat exchange drive device 1, and the inlet and outlet of the heat exchange drive device 1 are respectively connected to the inlet connector (20) and the outlet connector (21).

9. The built-in high-efficiency tube-row heat exchange device for large kettles according to claim 4, characterized in that: A second heat exchange driving device is also provided outside the reactor (2), a heat exchange medium is provided inside the second heat exchange driving device, and the inlet and outlet of the second heat exchange driving device are respectively connected to the inlet pipe connector (25) and the lower discharge pipe (24).

10. The built-in high-efficiency tube-row heat exchange device for large kettles according to claim 1, characterized in that: A feeding port (31) is fixedly mounted on the end surface of the reaction kettle (2), a discharge port (32) is fixedly connected to the bottom surface of the reaction kettle (2), and a valve (33) is provided on the surface of the discharge port (32).

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