A multi-stage circulating heat exchange glass-lined reactor

Abstract

This invention relates to the field of reactor technology, specifically disclosing a multi-stage circulating heat exchange glass-lined reactor, comprising a reactor body including a glass-lined inner liner, a heat exchange jacket, and an outer shell arranged sequentially from the inside out; a central guiding heat exchange unit including a central heat exchange cylinder fixedly disposed at the center of the bottom of the glass-lined inner liner; a jacketed partitioned heat exchange unit including a jacketed heat exchange cavity located between the glass-lined inner liner and the heat exchange jacket; and a reactor wall circulating heat exchange unit including a reactor wall heat exchange cavity located between the heat exchange jacket and the outer shell. The central guiding heat exchange unit cooperates with a mixing unit to drive the material flow to combine with the central guiding heat exchange unit, so that the heat-exchanged material forms a radial vortex diffusion path, enhancing the heat exchange efficiency of the material in the central region; the jacketed partitioned heat exchange unit cooperates with an axial material transfer unit to force the material into the reactor wall heat exchange cavity and circulate heat exchange with the coolant in the jacketed heat exchange cavity, forming a circulating heat exchange path.

Description

Technical Field

[0001] This invention relates to the field of reactor technology, and more specifically, to a multi-stage circulating heat exchange glass-lined reactor. Background Technology

[0002] Glass-lined reactors are a type of high-efficiency reaction equipment widely used in the processing of corrosive materials in chemical, pharmaceutical and other fields.

[0003] When performing reactions involving strongly exothermic or high-viscosity materials, existing glass-lined reactors are prone to forming a temperature dead zone in the central region. Heat exchange in the bottom deposit layer lags behind, and the jacket cooling path is short and singular, leading to large axial and radial temperature differences, localized overheating, and uneven reaction. Traditional stirring paddles can only achieve circumferential mixing and cannot effectively remove heat from the center. The single-layer jacket coolant passes through only once from bottom to top, resulting in low heat utilization. Material at the bottom of the reactor remains trapped due to density differences for extended periods, further exacerbating the temperature gradient. Therefore, there is an urgent need for a glass-lined reactor that can simultaneously eliminate the central dead zone, improve jacket heat exchange efficiency, and achieve forced circulation of material at the bottom of the reactor. Summary of the Invention

[0004] To overcome the above-mentioned technical problems, this invention proposes a multi-stage circulating heat exchange glass-lined reactor.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A multi-stage circulating heat exchange glass-lined reactor includes:

[0007] The vessel body includes, from the inside out, a glass-lined inner liner, a heat exchange jacket, and an outer shell;

[0008] A mixing unit is disposed inside a vessel and includes a drive motor fixedly installed on the top of the vessel and a rotating shaft connected to the output end of the drive motor. The lower end of the rotating shaft is provided with helical blades.

[0009] The central heat exchange unit includes a central heat exchange cylinder fixedly installed at the center of the bottom of the glass-lined inner liner. The central heat exchange cylinder is adapted to the spiral blades, and several reflux slots are opened circumferentially at the bottom of the central heat exchange cylinder.

[0010] A jacketed zoned heat exchange unit includes a jacketed heat exchange cavity located between a glass-lined inner liner and a heat exchange jacket. The lower end of the jacketed heat exchange cavity is connected to a first liquid inlet pipe, and the upper end of the jacketed heat exchange cavity is connected to a first liquid outlet pipe.

[0011] The vessel wall circulating heat exchange unit includes a vessel wall heat exchange cavity located between the heat exchange jacket and the outer shell. The upper and lower ends of the vessel wall heat exchange cavity are respectively provided with a feed trough and a discharge trough that communicate with the glass-lined inner liner.

[0012] An axial material transfer unit, which is vertically and vertically installed inside the glass-lined inner liner, is used to periodically lift the material at the bottom of the glass-lined inner liner to the feed trough.

[0013] As a further aspect of the present invention: a spiral flow divider is provided inside the heat exchange cavity of the vessel wall, and a spiral cooling channel is provided inside the spiral flow divider.

[0014] As a further aspect of the present invention: a partition plate is provided inside the jacketed heat exchange cavity, the partition plate dividing the jacketed heat exchange cavity into a lower heat exchange zone and an upper heat exchange zone, the lower heat exchange zone being connected to the first liquid inlet pipe, and the upper heat exchange zone being connected to the first liquid outlet pipe.

[0015] As a further aspect of the present invention: the inner wall of the lower heat exchange zone is provided with a first opening communicating with the lower end of the spiral cooling channel, and the inner wall of the upper heat exchange zone is provided with a second opening communicating with the upper end of the spiral cooling channel.

[0016] As a further aspect of the present invention: the axial transfer unit includes a conical transfer disk coaxially distributed around the periphery of the rotating shaft, the outer periphery of the conical transfer disk being sealed and fitted to the inner wall of the enamel liner, and an annular baffle integrally connected to the conical transfer disk, forming an axial annular channel between the annular baffle and the rotating shaft.

[0017] As a further aspect of the present invention, it also includes a hydraulic cooling drive unit, which includes an annular sleeve fixed to the top of the vessel body, a lifting piston disc slidably embedded in the annular sleeve, and the lifting piston disc and the annular baffle are fixedly connected by several connecting rods.

[0018] As a further aspect of the present invention: the annular sleeve is connected to a second inlet pipe and a second outlet pipe on both sides respectively, a first check valve is installed in the second inlet pipe, and a second check valve is installed in the second outlet pipe.

[0019] As a further aspect of the present invention: an axially extending central cooling channel is provided inside the rotating shaft, and a plurality of communicating grooves communicating with the inside of the annular sleeve are provided at the upper end of the central cooling channel.

[0020] As a further aspect of the present invention: a heat-conducting ring is embedded in the inner wall of the lower end of the central cooling channel, and a plurality of heat-conducting plates are circumferentially connected to the heat-conducting ring, and a plurality of through holes are formed on the heat-conducting plates.

[0021] As a further aspect of the present invention: a flexible bladder connected to the central cooling channel is installed at the bottom of the rotating shaft.

[0022] The beneficial effects of this invention are:

[0023] By cooperating with the mixing unit, the central heat exchange unit provides continuous stirring and mixing, which promotes full reaction and contact of materials. At the same time, the material flow driven by the mixing unit is combined with the central heat exchange unit. The return groove at the bottom of the central heat exchange cylinder makes the heat-exchanged material form a radial vortex diffusion path, which not only strengthens the mixing in the central area, but also enhances the heat exchange efficiency of the material in the central area through heat exchange and vortex diffusion inside the cylinder.

[0024] By utilizing the jacketed partitioned heat exchange unit, the coolant flows within the jacketed heat exchange chamber, directly engaging in large-area jacketed heat exchange with the outer wall of the glass-lined inner liner. Simultaneously, the axial material transfer unit periodically lifts the material deposited at the bottom of the glass-lined inner liner to the feed trough, forcing it into the vessel wall heat exchange chamber and circulating it with the coolant within the jacketed heat exchange chamber, forming a forced circulation heat exchange path. This effectively solves the problems of insufficient heat exchange and temperature lag caused by the poor fluidity of the material at the bottom of traditional reactors. Attached Figure Description

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0027] Figure 2 This is a half-sectional view of the present invention;

[0028] Figure 3 This is a partial cross-sectional view of the vessel body in this invention;

[0029] Figure 4 This is a schematic diagram of the path of material flow through the central guiding heat exchange unit in this invention;

[0030] Figure 5 This is a schematic diagram of the path of material flow through the axial material transfer unit in this invention;

[0031] Figure 6 This is a schematic diagram of the path of material flow through the circulating heat exchange unit on the reactor wall in this invention;

[0032] Figure 7 for Figure 3 Enlarged view of point A in the middle;

[0033] Figure 8 This is a schematic diagram of the hydraulic cooling drive unit in this invention;

[0034] Figure 9 for Figure 8 Enlarged view at point B in the middle;

[0035] Figure 10 This is a schematic diagram of the internal structure of the rotating shaft in this invention.

[0036] In the picture:

[0037] 100. Kettle body; 110. Feed pipe; 120. Discharge pipe; 130. Enameled inner liner; 140. Heat exchange jacket; 150. Outer shell;

[0038] 200. Mixing unit; 210. Drive motor; 220. Rotating shaft; 221. Spiral blade; 230. Central cooling channel; 240. Flexible bag; 250. Heat-conducting ring; 260. Heat-conducting plate; 270. Through hole; 280. Connecting groove;

[0039] 300. Central flow guiding heat exchange unit; 310. Central heat exchange cylinder; 320. Return flow slot;

[0040] 400, Jacketed zoned heat exchange unit; 410, Jacketed heat exchange cavity; 420, Partition plate; 430, Lower heat exchange zone; 440, Upper heat exchange zone; 450, First liquid inlet pipe; 460, First liquid outlet pipe;

[0041] 500. Circulating heat exchange unit on vessel wall; 510. Heat exchange chamber on vessel wall; 520. Feed inlet; 530. Discharge inlet; 540. Spiral flow divider; 550. Spiral cooling channel;

[0042] 600. Axial transfer unit; 610. Conical transfer disc; 620. Annular baffle;

[0043] 700, Hydraulic cooling drive unit; 710, Annular sleeve; 720, Lifting piston disc; 730, Connecting rod; 740, Second inlet pipe; 750, Second outlet pipe; 760, First check valve; 770, Second check valve. Detailed Implementation

[0044] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0045] Please see Figure 1 , Figure 2 and Figure 3This invention discloses a multi-stage circulating heat exchange glass-lined reactor, comprising a reactor body 100, a mixing unit 200, a central guiding heat exchange unit 300, a jacketed partitioned heat exchange unit 400, a reactor wall circulating heat exchange unit 500, and an axial material transfer unit 600. The reactor body 100 includes a glass-lined inner liner 130, a heat exchange jacket 140, and an outer shell 150 arranged sequentially from the inside to the outside. The upper and lower ends of the glass-lined inner liner 130 are respectively connected to a feed pipe 110 and a discharge pipe 120. The mixing unit 200 is disposed within the reactor body 100 and includes a drive motor 210 fixedly installed at the top of the reactor body 100 and a rotating shaft 220 connected to the output end of the drive motor 210. A spiral blade 221 is provided at the lower end of the rotating shaft 220. The central guiding heat exchange unit 300 includes a central heat exchange cylinder 310 fixedly disposed at the center of the bottom of the glass-lined inner liner 130. The central heat exchange cylinder 310 is adapted to the spiral blade 221, and the bottom of the central heat exchange cylinder 310 is provided with a plurality of reflux slots 320. The jacketed partitioned heat exchange unit 400 includes a jacketed heat exchange cavity 410 located between the glass-lined inner liner 130 and the heat exchange jacket 140. The lower end of the jacketed heat exchange cavity 410 is connected to a first liquid inlet pipe 450, and the upper end of the jacketed heat exchange cavity 410 is connected to a first liquid outlet pipe 460. The vessel wall circulating heat exchange unit 500 includes a vessel wall heat exchange cavity 510 located between the heat exchange jacket 140 and the outer shell 150. The upper and lower ends of the vessel wall heat exchange cavity 510 are respectively provided with a feed slot 520 and a discharge slot 530 communicating with the glass-lined inner liner 130. The axial material transfer unit 600 is vertically and vertically disposed inside the glass-lined inner liner 130 and is used to periodically lift the material at the bottom of the glass-lined inner liner 130 to the feed slot 520.

[0046] Specifically, the material is injected into the glass-lined inner liner 130 through the feed pipe 110 for reaction. The drive motor 210 drives the rotating shaft 220 to rotate continuously, thereby driving the spiral blades 221 to continuously stir and mix the material in the glass-lined inner liner 130, so as to promote full contact of the reactants.

[0047] Please see Figure 4 During the material reaction process, the material in the central area of ​​the glass-lined inner liner 130 is driven by the spiral blades 221 and enters the central heat exchange cylinder 310 from the opening above. When the material flows through the central heat exchange cylinder 310, it exchanges heat with the central heat exchange cylinder 310. Then, it flows radially back through the return grooves 320 at the bottom to the periphery of the central heat exchange cylinder 310 to form a vortex diffusion path, thereby realizing vortex heat exchange of the material in the central area.

[0048] Coolant enters the jacketed heat exchange chamber 410 through the first inlet pipe 450 and is discharged from the first outlet pipe 460 at the top. The coolant in the jacketed heat exchange chamber 410 can exchange heat with the material in the glass-lined inner liner 130.

[0049] Please see Figure 5 and Figure 6 The material at the bottom of the glass-lined inner liner 130 is periodically lifted to the feed inlet 520 and discharged into the heat exchange chamber 510 of the vessel wall by the axial material transfer unit 600. The coolant in the jacket heat exchange chamber 410 can exchange heat with the material in the heat exchange chamber 510 of the vessel wall. The material after heat exchange in the heat exchange chamber 510 of the vessel wall falls down and flows back into the glass-lined inner liner 130 through the feed inlet 520, so as to realize the vessel wall circulating heat exchange of the material.

[0050] It should be noted that, through the cooperation of the central guiding heat exchange unit 300 and the mixing unit 200, the mixing unit 200 provides continuous stirring and mixing, which promotes the full reaction and contact of the materials. At the same time, the material flow driven by it is combined with the central guiding heat exchange unit 300. The return groove 320 at the bottom of the central heat exchange cylinder 310 makes the heat-exchanged material form a radial vortex diffusion path, which not only strengthens the mixing in the central area, but also enhances the heat exchange efficiency of the material in the central area through heat exchange and vortex diffusion in the cylinder.

[0051] Using the jacketed partitioned heat exchange unit 400, the coolant flows in the jacketed heat exchange chamber 410, directly exchanging heat over a large area with the outer wall of the glass-lined inner liner 130. At the same time, the axial material transfer unit 600 periodically lifts the material deposited at the bottom of the glass-lined inner liner 130 to the feed inlet 520, forcing it into the vessel wall heat exchange chamber 510 and circulating it with the coolant in the jacketed heat exchange chamber 410, forming a forced circulation heat exchange path. This effectively solves the problem of insufficient heat exchange and temperature lag caused by the poor fluidity of the material at the bottom of the traditional reactor.

[0052] In one embodiment, please refer to Figure 3 and Figure 7 The heat exchange cavity 510 of the vessel wall is provided with a spiral flow divider 540, and the spiral flow divider 540 is provided with a spiral cooling channel 550.

[0053] Specifically, when the axial material transfer unit 600 lifts the material at the bottom of the glass-lined inner liner 130 to the feed inlet 520 and discharges it into the heat exchange chamber 510 of the vessel wall, the material entering the heat exchange chamber 510 flows spirally downward along the spiral diversion plate 540, while the coolant in the spiral diversion plate 540 flows spirally upward through the spiral cooling channel 550, thereby realizing spiral cross-flow cooling of the material in the heat exchange chamber 510 of the vessel wall.

[0054] It should be noted that after the material enters the heat exchange chamber 510 of the vessel wall from the feed trough 520, it is forced to flow downward spirally along the path of the spiral diverter plate 540; at the same time, the coolant flows upward spirally in the spiral cooling channel 550. The counter-current flow of the two ensures that the material and the coolant maintain a large average temperature difference in the spiral channel, which effectively improves the heat transfer driving force and thus greatly enhances the heat exchange efficiency in the heat exchange chamber 510 of the vessel wall.

[0055] The spiral flow divider 540 forces the material to flow downward along the spiral path, extending the flow path and residence time of the material in the heat exchange chamber 510 of the vessel wall. Combined with the guiding and dispersing effect of the spiral channel on the material, the material can more fully and evenly contact the plate wall of the embedded spiral cooling channel 550 and exchange heat, effectively solving the problem of short circuit or uneven heat exchange that may occur in the vertical channel and improving the cooling uniformity.

[0056] The structure of the spiral flow divider 540 provides a directional spiral downward flow path for the material, which helps to prevent local deposition or accumulation of material in the heat exchange chamber 510 of the vessel wall, avoids the risk of sludge blockage near the discharge trough 530, and ensures the continuity and stability of the circulating heat exchange process.

[0057] Further, please refer to Figure 3 and Figure 7 The jacketed heat exchange cavity 410 is provided with a partition plate 420, which divides the jacketed heat exchange cavity 410 into a lower heat exchange zone 430 and an upper heat exchange zone 440. The lower heat exchange zone 430 is connected to the first liquid inlet pipe 450, and the upper heat exchange zone 440 is connected to the first liquid outlet pipe 460. The inner wall of the lower heat exchange zone 430 has a first opening (not shown in the figure) communicating with the lower end of the spiral cooling channel 550, and the inner wall of the upper heat exchange zone 440 has a second opening (not shown in the figure) communicating with the upper end of the spiral cooling channel 550.

[0058] Specifically, when the coolant enters the lower heat exchange zone 430 through the first inlet pipe 450, the coolant in the lower heat exchange zone 430 enters the spiral cooling channel 550 through the first opening. Subsequently, the coolant flows spirally upward through the spiral cooling channel 550 and is discharged into the upper heat exchange zone 440 through the second opening. Finally, the coolant in the upper heat exchange zone 440 is discharged through the first drain pipe 460. When the coolant flows through the lower heat exchange zone 430 and the upper heat exchange zone 440, it can simultaneously perform heat exchange on the materials in the glass-lined inner liner 130 and the heat exchange chamber 510 of the vessel wall. In addition, when the coolant flows through the spiral cooling channel 550, it can perform spiral countercurrent heat exchange on the spiral distributor plate 540.

[0059] It is worth noting that after the coolant enters the lower heat exchange zone 430 through the first inlet pipe 450, it enters the spiral cooling channel 550 through the first opening and flows spirally from bottom to top. After performing two-stage countercurrent heat exchange on the spiral distributor plate 540 and the material flowing through the heat exchange chamber 510 of the vessel wall, it flows into the upper heat exchange zone 440 and is finally discharged from the first drain pipe 460. The single stream of coolant completes multiple heat exchange in sequence: lower jacket - spiral countercurrent - upper jacket, effectively improving the thermal energy utilization rate of the cooling medium.

[0060] The spiral cooling channel 550 is integrated inside the spiral flow divider plate 540. The coolant spirals upward inside and forms a precise counter-current heat exchange path with the material spiraling downward along the spiral flow divider plate 540 in the heat exchange chamber 510 of the vessel wall. This not only continues the advantages of efficient counter-current heat exchange, but also enhances the directional temperature control capability of the flowing material by directly cooling the spiral flow divider plate 540 itself through the spiral cooling channel 550, ensuring that the material obtains a more stable and uniform cooling effect during the spiral downward process.

[0061] The jacketed heat exchange chamber 410 is divided into a lower heat exchange zone 430 and an upper heat exchange zone 440 by the partition plate 420, and a series flow path is formed with the spiral cooling channel 550 by the side wall opening, realizing the deep coupling of jacketed heat exchange and vessel wall circulating heat exchange; after the coolant completes the initial heat exchange in the jacketed chamber, its remaining cold energy is efficiently transported to the spiral cooling channel 550 for secondary utilization, making the overall thermal management system more compact, efficient and energy-saving.

[0062] In yet another embodiment, please refer to Figure 3 The axial material transfer unit 600 includes a conical material transfer disk 610 coaxially distributed around the rotating shaft 220. The outer periphery of the conical material transfer disk 610 is sealed and fitted to the inner wall of the glass-lined inner liner 130. An annular baffle 620 is integrally connected to the conical material transfer disk 610, and an axial annular channel is formed between the annular baffle 620 and the rotating shaft 220.

[0063] Specifically, when the axial transfer unit 600 moves downward as a whole, the conical transfer plate 610 squeezes the lower layer of material in the glass-lined inner liner 130 downward, causing the lower layer of material to flow upward through the axial annular channel and overflow radially outward toward the outer side of the annular baffle 620 into the space above the conical transfer plate 610. Subsequently, the axial transfer unit 600 moves upward as a whole, which can lift the material in the space above the conical transfer plate 610 upward until the outer periphery of the conical transfer plate 610 is flush with the lower end of the feed trough 520. This allows the material in the space above the conical transfer plate 610 to flow into the heat exchange chamber 510 of the vessel wall through the feed trough 520, thereby realizing the periodic circulation transfer of the bottom layer of material in the glass-lined inner liner 130.

[0064] As the conical transfer tray 610 descends, its conical structure and the sealed fit with the inner wall of the glass-lined inner liner 130 forcefully compress the material at the bottom of the inner liner. The compressed material is forced to flow upward through the axial annular channel formed between the annular baffle 620 and the rotating shaft 220, and overflows radially into the space above the conical transfer tray 610. This process efficiently gathers and transfers the material deposited at the bottom of the reactor, overcoming the problem that traditional stirring is difficult to effectively lift high-viscosity or easily sedimenting materials.

[0065] It should be noted that by controlling the overall lifting and lowering movement of the axial material transfer unit 600, the material gathered in the space above the conical material transfer plate 610 can be lifted to a height level with the lower end of the feed trough 520. At this time, the material flows into the heat exchange chamber 510 of the vessel wall under the action of gravity, realizing the periodic quantitative transfer of the bottom material to the vessel wall circulating heat exchange unit 500, ensuring the stability and controllability of the circulating heat exchange.

[0066] The conical transfer plate 610 and the annular baffle 620 are coaxially distributed around the rotating shaft 220. The annular structure formed by the annular baffle 620 effectively blocks the direct connection between the material in the upper space and the material in the lower space when the conical transfer plate 610 lifts the material, preventing the backflow of the material during the lifting process. At the same time, it ensures that the material overflows in a directional manner to the space above the plate and is lifted completely, minimizing the interference with the stirring and mixing process in the main reaction zone.

[0067] Further, please refer to Figure 2 and Figure 8 It also includes a hydraulic cooling drive unit 700, which includes an annular sleeve 710 fixed to the top of the vessel body 100. A lifting piston disc 720 is slidably embedded in the annular sleeve 710. The lifting piston disc 720 is fixedly connected to the annular baffle 620 by a number of connecting rods 730.

[0068] Specifically, when pressure is applied to the annular sleeve 710, the lifting piston disc 720 slides downward under pressure, thereby driving the axial material transfer unit 600 to move downward through the connecting rod 730 to extrude the material; when pressure is reduced inside the annular sleeve 710, the lifting piston disc 720 slides upward, thereby driving the axial material transfer unit 600 to move upward to lift the material.

[0069] Furthermore, please refer to Figure 8 and Figure 9 The annular sleeve 710 is connected to a second inlet pipe 740 and a second outlet pipe 750 on both sides respectively. A first one-way valve 760 is installed in the second inlet pipe 740 and a second one-way valve 770 is installed in the second outlet pipe 750.

[0070] Specifically, during the pressurization phase, the first one-way valve 760 opens in one direction and the second one-way valve 770 closes in one direction, injecting coolant into the annular sleeve 710 through the second inlet pipe 740, thereby driving the lifting piston disc 720 downward; during the depressurization phase, the first one-way valve 760 closes in one direction and the second one-way valve 770 opens in one direction, allowing the coolant in the annular sleeve 710 to be discharged from the second drain pipe 750, thereby driving the lifting piston disc 720 upward.

[0071] It should be noted that when the first one-way valve 760 opens, coolant is injected into the annular sleeve 710 under pressure through the second inlet pipe 740, pushing the lifting piston disc 720 downward. This, in turn, forces the axial material transfer unit 600 to move downward via the connecting rod 730, thus completing the material extrusion. Subsequently, the second one-way valve 770 opens, and coolant is discharged from the annular sleeve 710 through the second drain pipe 750, driving the lifting piston disc 720 upward and causing the axial material transfer unit 600 to move upward, thus completing the material lifting.

[0072] The hydraulic chamber is completely built into the sealed environment of the reactor, avoiding the leakage risk caused by external hydraulic pipelines penetrating the reactor body 100, and solving the problem of the traditional external hydraulic drive damaging the sterile / sealed environment of the reactor; the first one-way valve 760 and the second one-way valve 770 automatically switch between open and closed states according to the pressure difference. During the pressurization stage, the first one-way valve 760 opens to allow liquid inflow, and the second one-way valve 770 closes; during the depressurization stage, the first one-way valve 760 closes, and the second one-way valve 770 opens to drain liquid, realizing automatic cyclic control of the lifting process.

[0073] In further embodiments, please refer to Figure 9 and Figure 10 The rotating shaft 220 has an axially extending central cooling channel 230. The upper end of the central cooling channel 230 has several communicating grooves 280 that communicate with the interior of the annular sleeve 710. The lower end of the central cooling channel 230 has a heat-conducting ring 250 embedded in its inner wall. The heat-conducting ring 250 is circumferentially connected with several heat-conducting plates 260. Several through holes 270 are formed on the heat-conducting plates 260.

[0074] Specifically, during the continuous rotation of the shaft 220, the central cooling channel 230 remains connected to the annular sleeve 710 due to the connection groove 280. During the pressurization phase, the coolant in the annular sleeve 710 can simultaneously enter the central cooling channel 230 through the connection groove 280. The heat-conducting plate 260 can exchange heat with the material in the glass-lined inner liner 130. The through hole 270 effectively increases the contact area between the heat-conducting plate 260 and the material and reduces the rotational resistance. The heat from the material is conducted to the heat-conducting ring 250 inside the shaft 220 through the heat-conducting plate 260, and then the heat is fully absorbed by the coolant, further improving the heat exchange effect. During the subsequent depressurization phase, the coolant that has absorbed heat and increased in temperature in the central cooling channel 230 is drawn back into the annular sleeve 710 through the connection groove 280, thereby achieving the discharge of the high-temperature coolant.

[0075] It should be noted that during the pressurization stage, the coolant in the annular sleeve 710 enters the central cooling channel 230 through the connecting groove 280 to absorb heat as a cooling medium; during the depressurization stage, the coolant that has absorbed heat and increased in temperature is drawn back into the annular sleeve 710 through the connecting groove 280 and finally discharged through the second drain pipe 750; the coolant simultaneously serves as both a hydraulic drive medium and a cooling medium, achieving efficient closed-loop reuse of energy and fluid;

[0076] The heat-conducting ring 250 is embedded in the lower inner wall of the central cooling channel 230, and the heat-conducting plate 260 extends circumferentially into the material. The through holes 270 on its surface increase the heat exchange contact area and reduce the rotational resistance, thereby transforming the rotating shaft 220 into a dynamic heat exchanger, directly cooling the high-temperature area of ​​the shaft center that is difficult to cover by traditional stirring. When the rotating shaft 220 rotates, the heat-conducting plate 260 continuously scrapes the material and makes full contact with it. The heat is efficiently transferred to the coolant in the central cooling channel 230 through the heat-conducting plate 260 and the heat-conducting ring 250, solving the problem of local overheating caused by dead zones in the axial area of ​​the reactor.

[0077] Further, please refer to Figure 10 The bottom of the rotating shaft 220 is equipped with a flexible bag 240 that communicates with the central cooling channel 230;

[0078] Specifically, during the pressurization stage, the axial transfer unit 600 is driven downward by the lifting piston disc 720. At the same time, the coolant in the central cooling channel 230 enters the flexible bag 240, causing the flexible bag 240 to expand. This not only increases the heat exchange area between the coolant inside the flexible bag 240 and the surrounding material, but also allows the expanded flexible bag 240 to squeeze the material at the bottom of the central heat exchange cylinder 310 outward in a circumferential direction. This causes the material to turn upward and reach the top of the conical transfer disc 610 through the axial annular channel, making it easier to squeeze the material into the space above the conical transfer disc 610.

[0079] During the decompression stage, the axial material transfer unit 600 is driven upward by the lifting piston disc 720. At the same time, the central cooling channel 230 extracts the coolant from the flexible bag 240, causing the flexible bag 240 to contract, thereby realizing the recovery of the high-temperature coolant and facilitating the downward flow of the upper material in the central heat exchange cylinder 310.

[0080] It should be noted that during the pressurization stage, the coolant in the central cooling channel 230 is injected into the flexible bag 240 to expand it, directly increasing the contact area with the surrounding materials and improving the heat exchange efficiency in the bottom area of ​​the shaft. The expanded flexible bag 240 squeezes the material at the bottom of the central heat exchange cylinder 310 outward in a circumferential direction, pushing the material upward into the axial annular channel formed by the annular baffle 620 and the rotating shaft 220, and finally reaching the space above the conical transfer plate 610, breaking the dead corner of bottom material deposition and simultaneously realizing material turning and heat exchange enhancement.

[0081] The expansion of the flexible bag 240 extrudes the material radially, which, together with the downward extrusion action of the axial transfer unit 600, creates a synergistic effect, greatly improving the efficiency of the bottom material gathering in the transfer zone;

[0082] During the decompression phase, the central cooling channel 230 draws back the coolant, causing the flexible bag 240 to contract, thus creating downward space for the upper material in the central heat exchange cylinder 310, avoiding obstruction of the eddy diffusion path, and ensuring the normal operation of the central guiding heat exchange unit 300.

[0083] The coolant sequentially serves as the hydraulic medium driving the lifting piston disc 720 downward, the heat exchange medium cooling the core area of ​​the rotating shaft 220, and the mechanical actuator medium propelling the material flow, thereby enabling a single fluid to simultaneously perform the triple functions of driving, heat exchange, and power transmission.

[0084] The specific embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A multi-stage circulating heat exchange glass-lined reactor, characterized in that, include: The vessel body (100) includes a glass-lined inner liner (130), a heat exchange jacket (140), and an outer shell (150) arranged sequentially from the inside to the outside. The mixing unit (200) is located inside the vessel body (100) and includes a drive motor (210) fixedly installed on the top of the vessel body (100) and a rotating shaft (220) connected to the output end of the drive motor (210). The lower end of the rotating shaft (220) is provided with a spiral blade (221). The central heat exchange unit (300) includes a central heat exchange cylinder (310) fixedly installed at the center of the bottom of the glass-lined inner liner (130). The central heat exchange cylinder (310) is adapted to the spiral blades (221), and a plurality of reflux slots (320) are opened circumferentially at the bottom of the central heat exchange cylinder (310). The jacketed partitioned heat exchange unit (400) includes a jacketed heat exchange cavity (410) located between the glass-lined inner liner (130) and the heat exchange jacket (140). The lower end of the jacketed heat exchange cavity (410) is connected to a first liquid inlet pipe (450), and the upper end of the jacketed heat exchange cavity (410) is connected to a first liquid outlet pipe (460). The vessel wall circulating heat exchange unit (500) includes a vessel wall heat exchange cavity (510) located between the heat exchange jacket (140) and the outer shell (150). The upper and lower ends of the vessel wall heat exchange cavity (510) are respectively provided with a feed trough (520) and a discharge trough (530) communicating with the glass-lined inner liner (130). An axial material transfer unit (600) is vertically and vertically installed inside the glass liner (130) to periodically lift the material at the bottom of the glass liner (130) to the feed inlet (520). A spiral flow divider plate (540) is provided inside the heat exchange cavity (510) of the vessel wall, and a spiral cooling channel (550) is provided inside the spiral flow divider plate (540). A partition plate (420) is provided inside the jacketed heat exchange cavity (410). The partition plate (420) divides the jacketed heat exchange cavity (410) into a lower heat exchange zone (430) and an upper heat exchange zone (440). The lower heat exchange zone (430) is connected to the first liquid inlet pipe (450), and the upper heat exchange zone (440) is connected to the first liquid outlet pipe (460). The inner wall of the lower heat exchange zone (430) is provided with a first opening that communicates with the lower end of the spiral cooling channel (550), and the inner wall of the upper heat exchange zone (440) is provided with a second opening that communicates with the upper end of the spiral cooling channel (550).

2. The multi-stage circulating heat exchange glass-lined reactor according to claim 1, characterized in that, The axial transfer unit (600) includes a conical transfer disk (610) coaxially distributed around the rotating shaft (220). The outer periphery of the conical transfer disk (610) is sealed and fitted to the inner wall of the enamel inner liner (130). An annular baffle (620) is integrally connected to the conical transfer disk (610). An axial annular channel is formed between the annular baffle (620) and the rotating shaft (220).

3. The multi-stage circulating heat exchange glass-lined reactor according to claim 2, characterized in that, It also includes a hydraulic cooling drive unit (700), which includes an annular sleeve (710) fixed to the top of the vessel body (100), and a lifting piston disc (720) is slidably embedded in the annular sleeve (710). The lifting piston disc (720) and the annular baffle (620) are fixedly connected by several connecting rods (730).

4. The multi-stage circulating heat exchange glass-lined reactor according to claim 3, characterized in that, The annular sleeve (710) is connected to a second inlet pipe (740) and a second outlet pipe (750) on both sides respectively. A first check valve (760) is installed in the second inlet pipe (740) and a second check valve (770) is installed in the second outlet pipe (750).

5. A multi-stage circulating heat exchange glass-lined reactor according to claim 3, characterized in that, The rotating shaft (220) has an axially extending central cooling channel (230), and the upper end of the central cooling channel (230) has several connecting grooves (280) that communicate with the interior of the annular sleeve (710).

6. A multi-stage circulating heat exchange glass-lined reactor according to claim 5, characterized in that, A heat-conducting ring (250) is embedded in the inner wall of the lower end of the central cooling channel (230). A number of heat-conducting plates (260) are connected circumferentially to the heat-conducting ring (250), and a number of through holes (270) are opened on the heat-conducting plates (260).

7. A multi-stage circulating heat exchange glass-lined reactor according to claim 5, characterized in that, The bottom of the rotating shaft (220) is fitted with a flexible bladder (240) that communicates with the central cooling channel (230).

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