A reactor

Abstract

The present application discloses a reactor, which includes a reaction chamber and a stirring shaft arranged in the reaction chamber; a stirring paddle is arranged on the stirring shaft, and the stirring paddle rotates in the reaction chamber under the driving action of the stirring shaft; the stirring shaft includes a cavity, and a steam inlet pipe and a steam outlet pipe are arranged in the cavity; the steam outlet pipe includes a hanging pipe, and the front end of the hanging pipe always keeps it vertically downward during the rotation process to discharge condensed water formed in the stirring shaft cavity; compared with the prior art, the present application uses the stirring shaft to heat the wastewater and sludge in the reactor more fully.

Description

Technical Field

[0001] The invention discloses a reaction kettle, and particularly relates to an improvement on a stirring device of the reaction kettle. Background Art

[0002] Reactors are widely used in industries such as environmental protection, healthcare, printing, and petroleum. Their purpose is to increase the heat exchange area between the material inside the reactor and the heat source, thereby improving production efficiency and saving energy. A reactor is a sealed container with a stirring function. A water-circulating vacuum pump can be used to pump the pressure inside the reactor to a level of -90 kPa or less, achieving low-temperature boiling (46 to 60 degrees Celsius) of sludge or wastewater under negative pressure. Simultaneously, the reactor is heated and combined with a distillation vessel to achieve rapid solid-liquid separation.

[0003] Currently, in waste treatment and sludge drying equipment, only the bottom of the reactor is heated. However, wastewater and sludge adhering to the agitator shaft inside the reactor cannot be heated quickly, resulting in low wastewater and sludge treatment efficiency. Therefore, it is necessary to develop a new technology that can heat the agitator shaft surface to improve wastewater and sludge treatment efficiency and save energy. Summary of the Invention

[0004] The object of the present invention is to provide a reactor heated by a shaft, wherein the stirring shaft can be sufficiently heated when waste water and waste mud flow through the stirring shaft during the stirring process of the reactor.

[0005] In order to solve the above technical problems, the present invention provides a reactor, which includes: a reaction chamber and a stirring shaft arranged in the reaction chamber; a stirring paddle is arranged on the stirring shaft, and the stirring paddle rotates in the reaction chamber under the driving action of the stirring shaft; the stirring shaft includes a cavity, and a steam inlet pipe and a steam outlet pipe are arranged in the cavity; the steam outlet pipe includes a hanging pipe, and the front end of the hanging pipe always keeps it vertically downward during the rotation process to discharge the condensed water formed in the cavity of the stirring shaft.

[0006] In a preferred embodiment of the present invention, the stirring shaft includes a cylindrical stirring shaft cover, and a first support shaft and a second support shaft arranged at both ends of the stirring shaft cover; the steam inlet pipe includes a first axial opening arranged in the first support shaft; the steam outflow pipe is arranged in the steam inlet pipe; a steam outlet leading to the mold cavity is arranged at the first end of the steam inlet pipe; the second ends of the steam inlet pipe and the steam outflow pipe are both connected to a rotary sealing device, which includes an air inlet and an air outlet.

[0007] In a preferred embodiment of the present invention, the rotary sealing device includes a sealing shaft and a sealing sleeve, the sealing shaft includes a first step arranged at the first end and a second step at the second end, and an air inlet groove arranged in the middle of the steps, a plurality of radially extending through holes are arranged in the air inlet groove, and the plurality of radially extending through holes connect the air inlet groove and the second axial opening arranged in the sealing shaft; the second axial opening forms an opening on the second axial end face of the sealing shaft; the outside of the opening is covered with a sealing disk, and the sealing disk is connected to the steam outlet pipe so that the steam inlet pipe and the steam outlet pipe are sealed to each other.

[0008] In a preferred embodiment of the present invention, the sealing sleeve includes a cylindrical cavity for accommodating the first step and the second step, and the sealing sleeve is provided with an air inlet which is connected to the air inlet groove; the sealing sleeve is provided with an air outlet which is connected to the air outlet cavity between the second step and the sealing sleeve.

[0009] In a preferred embodiment of the present invention, it also includes a cylindrical first support shaft sleeve; the first support shaft sleeve is arranged on the first support shaft, and the first support shaft sleeve is installed at the first end opening of the stirring shaft cover; it also includes a cylindrical second support shaft sleeve. The second support shaft sleeve is arranged on the second support shaft, and the second support shaft sleeve is sleeved at the second end opening of the stirring shaft cover; the connection between the first support shaft and the first support shaft sleeve and the first end opening of the stirring shaft cover is a sealed connection; the connection between the second support shaft and the second support shaft sleeve and the second support shaft sleeve and the second end opening of the stirring shaft cover is a sealed connection.

[0010] In a preferred embodiment of the present invention, a plurality of radially extending through holes are provided in the air inlet groove and are staggered in axial position from the air inlet.

[0011] In a preferred embodiment of the present invention, a positive pressure hot steam source is applied to the air inlet, and the hot steam flows through the air inlet groove into multiple radial extension holes, and enters the cavity in the stirring shaft mask through the first axial opening in the first support shaft and the air outlet; the positive pressure steam in the cavity presses the condensed water at the bottom of the cavity out of the cavity through the drop pipe, and the condensed water flows out through the air outlet cavity and the air outlet between the second step and the sealing sleeve.

[0012] In a preferred embodiment of the present invention, the first support shaft and the second support shaft are disposed in the first support bearing and the second support bearing, and the first support bearing and the second support bearing are fixed to the bracket of the reactor through a support plate assembly.

[0013] In a preferred embodiment of the present invention, a driving device is provided at one end of the second supporting shaft away from the stirring shaft.

[0014] In a preferred embodiment of the present invention, the reaction chamber is connected to a vacuum source capable of pumping the internal pressure thereof to less than or equal to -90 kPa.

[0015] The present invention offers advantages over existing technologies in that the wastewater and waste sludge are stirred by the stirring shaft while it is heated and rotated within the reactor, allowing the stirred wastewater and waste sludge flowing through the stirring shaft to be fully and rapidly heated. Furthermore, since the stirring shaft itself has a heating function, the problem of wastewater and waste sludge remaining on the stirring shaft not being heated is eliminated compared to existing technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the reactor.

[0017] Figure 2 is Figure 1 Schematic diagram of the three-dimensional structure of the reactor mask being decomposed.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the second support shaft and its related connecting parts.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the stirring paddle.

[0020] Figure 5 It is a schematic diagram of the stirring paddle structure from a top view.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the first support shaft and related connecting parts.

[0022] Figure 7 It is along Figure 1 Schematic diagram of the cross-sectional structure in the direction of bar A in the middle.

[0023] Figure 8 It is along Figure 7 Schematic diagram of the P2 structure in the middle section.

[0024] Figure 9 It is along Figure 7 Schematic diagram of the P1 structure in the middle section.

[0025] Figure 10 It is along Figure 7 Schematic diagram of the P3 structure in the middle section.

[0026] Figure 11 It is a schematic diagram of the top view of the steam inlet pipe support plate. DETAILED DESCRIPTION

[0027] The following combination Figures 1 to 11 The present invention is described in further detail to help those skilled in the art understand the technical solution of the present invention. It should be emphasized that the contents of the specific embodiments of the present invention do not limit the scope of protection of the present invention, and the scope of protection of the present invention shall be based on the description of the claims.

[0028] Generally speaking, the reactor 100 includes a reaction chamber 101 and a stirring shaft 200 arranged in the reaction chamber 101; a stirring paddle 240 is provided on the stirring shaft 200, and the stirring paddle 240 rotates in the reaction chamber 101 under the driving action of the stirring shaft 200; the stirring shaft 200 includes a cavity 201, and a steam inlet pipe 220 and a steam outlet pipe 230 are provided in the cavity 201; the steam outlet pipe 230 includes a hanging pipe 231. The front end of the hanging pipe 231 always keeps its front end vertically downward during the rotation process to discharge the condensed water formed in the cavity 201 of the stirring shaft 200.

[0029] By introducing hot steam into the stirring shaft 200, the stirring shaft 200 is heated under the action of steam, and the stirred mud can be heated during stirring. The stirred mud flowing through the heating shaft can be quickly heated up, thereby increasing the heating speed of the reactor 100 and saving energy. Compared with the existing technology, the present invention uses shaft heating rather than reactor bottom heating, which is more efficient.

[0030] The reactor 100 includes a first reactor plate 111 and a second reactor plate 112. The first and second reactor plates 112 are arranged in parallel, and a reactor support 120 is provided between the first and second reactor plates 111, 112. The reactor support 120 includes longitudinal support rods 121 and transverse support rods 122. The four longitudinal support rods 121 are connected to the four corners of the first and second reactor plates 111, 112. The transverse support rods 122 connect the longitudinal reactor plates to increase the structural strength of the reactor.

[0031] The reactor includes a first reactor wall 131 and a second reactor wall 132. The first reactor wall 131 and the second reactor wall 132 are semi-cylindrical and connected together in a conventional manner. The first reactor wall 131 and the second reactor wall 132 are sealed together. The first reactor wall 131 and the second reactor wall 132 are further sealed to the first reactor plate 111 and the second reactor plate 112, respectively, thereby forming a cylindrical reactor chamber.

[0032] One or more observation windows 113 and maintenance windows 114 are provided on the first reactor plate 111 and the second reactor plate 112 . The conditions inside the reactor can be observed through the observation windows 113 , and the maintenance windows 114 can be opened for maintenance when problems occur in the reactor.

[0033] Reaction chamber 101 is used to accommodate sewage and sludge. The sewage and sludge are heated and boiled under low pressure. Reaction chamber 101 is connected to a vacuum source (not shown) capable of pumping its internal pressure to a value of -90 kPa or less. This vacuum source is typically a water-circulating vacuum source. This type of water-circulating vacuum source is well known to those skilled in the art and will not be further described here.

[0034] The reactor is connected to a distillation unit, which converts the steam generated within the reactor into distilled water. Under the influence of a vacuum source, the wastewater and sludge within the reactor boil at temperatures between 46°C and 60°C. The resulting water vapor enters the distillation unit, where it condenses to form distilled water. The remaining sludge in the reactor after distillation can be removed from the reactor using specialized equipment.

[0035] Reference Figure 3 , in which the second support shaft 204 is shown, and components not related to the counter-second support shaft 204 are omitted for simplicity.

[0036] A first support shaft 203 and a second support shaft 204 are mounted on the first and second reactor plates 111 and 112. The first support shaft 203 supports the second end of the agitator shaft 200 and drives the agitator shaft 200 in rotation. A cylindrical second support sleeve 207 is also included; the second support sleeve 207 is mounted on the second support shaft 204 and is installed at the second end opening 208 of the agitator shaft cover plate 202. The connection between the second support shaft 204 and the second support sleeve 207, as well as the opening of the agitator shaft 200 and the second support sleeve 207, is sealed.

[0037] The second support shaft 204 is connected to the end away from the stirring shaft 200 by a drive device 210. The drive device 210 includes a gear drive and a connecting cover 211. The connecting cover 211 is connected to the annular connecting portion 212 of the gear drive, and the gear of the gear drive is connected to the external driving power source.

[0038] In a preferred embodiment of the present invention, the external driving power source is a drive motor and a reducer assembly that can control the speed and direction. The external power source is a technology well known to those skilled in the art and will not be described in detail here.

[0039] In a preferred embodiment of the present invention, the aforementioned sealed connection is achieved through interference connection.

[0040] It also includes a cylindrical first support sleeve 206. The first support sleeve 206 is arranged on the first support shaft 203, and the first support sleeve 206 is sleeved on the first end opening 209 of the stirring shaft mask 202; the connection between the first support shaft 203 and the first support sleeve 206 and the first support sleeve 206 and the first opening 209 of the stirring shaft mask 202 is a sealed connection.

[0041] The first support shaft 203 and the second support shaft 204 are disposed within the first support bearing 251 and the second support bearing 252, which are fixed to the reactor support 120 via a support plate assembly 500. The support shaft is Ω-shaped, with a first connecting plate 253 disposed on a first side of the support shaft and a second connecting plate 254 disposed on a second side of the support shaft. The first connecting plate 253 and the second connecting plate 254 are connected to the support plate assembly 500 via screw assemblies.

[0042] Taking the support plate assembly 500 on the side of the second support shaft 204 as an example, the support plate assembly 500 includes a first support plate 501 and a second support plate 502 arranged longitudinally. The first support plate 501 and the second support plate 502 are arranged parallel to each other and spaced a certain distance apart. A third support plate 503 is arranged transversely between the first support plate 501 and the second support plate 502. The first end and the second end of the third support plate 503 are respectively connected to the first support plate 501 and the second support plate 502. The first connecting plate 253 and the second connecting plate 254 are connected to the third support plate 503 via screw assemblies.

[0043] The support plate assembly 500 on the first support shaft 203 side is the same as the support plate assembly 500 on the second support shaft 204 side and will not be described in detail herein.

[0044] Reference Figure 4 and Figure 5 , which respectively shows a three-dimensional structural schematic diagram and a top structural schematic diagram of the stirring paddle unit 241 of the stirring paddle 240, wherein only one stirring paddle unit 241 in the stirring paddle 240 is shown. Those skilled in the art can repeatedly set multiple stirring paddle units 241 on the stirring shaft 200 to form a complete stirring paddle 240 based on the structure of the stirring paddle unit 241.

[0045] The stirring paddle 240 includes a plurality of stirring paddle units 241. Each stirring paddle unit 241 includes two parallel triangular support plates 242. In the center of the triangular support plate 242 is a hole 243 for the stirring shaft 200 to pass through. Paddles 244 and paddle fixing plates 245 are provided at the three corners of the triangular support plate 242. The top view structure of the paddle 244 is a trapezoidal structure. The paddle 244 extends obliquely along the diagonal fixing plate 245. This oblique extension structure enables the wastewater to flow laterally along the surface of the stirring shaft 200 when the stirring paddle 240 is stirring, so that the wastewater is heated more fully and stirred more fully. The trapezoidal structure of the stirring paddle 240 can prevent the stirring paddle 240 from getting stuck during the stirring process.

[0046] Reference Figure 6 , Figure 6 It is a schematic diagram of the three-dimensional structure of the first support shaft 203 and related connecting components, in which the stirring paddle 240 and the reactor bracket and other structures are omitted.

[0047] The stirring shaft 200 includes a cylindrical stirring shaft cover 202. A first support shaft 203 is provided at a first end of the stirring shaft cover 202. The steam inlet pipe 220 includes a first axial opening 205 provided in the first support shaft 203.

[0048] The first end of the first support shaft 203 is provided with a steam outlet 221 leading to the mold cavity 201 within the stirring shaft cover 202. The second end of the first support shaft 203 is connected to the rotary seal device 300 (described in detail below). During normal operation, steam from the rotary seal device 300 is output through the second end of the first support shaft 203 to the steam opening and enters the mold cavity 201 in the stirring shaft 200.

[0049] The steam outflow conduit 230 is disposed within the steam inlet conduit 220. A first end 232 of the steam outflow conduit 230 includes a drop tube 231. As the steam output conduit rotates with the agitator shaft 200, the front end of the drop tube 231 remains drooped downward, allowing the steam inlet of the drop tube 231 to directly contact condensed water formed at the bottom of the agitator shaft 200 cavity 201. The condensed water is then transported out through the drop tube 231 under the action of positive pressure steam.

[0050] In the preferred technical solution of the present application, the vertical tube is a polymer flexible tube, the pendant tube 231 is a rubber tube, the pendant tube 231 is a resin tube, the pendant tube 231 is a nylon tube, the pendant tube 231 is a metal tube, and the pendant tube 231 is a flexible pipe made of other materials that can be easily thought of by technicians in this field.

[0051] The steam output pipeline 230 includes a first output pipe 233 and a second output pipe 234. The first and second output pipes 233 and 234 are connected by a threaded structure. The pendant pipe 231 is also threadedly connected to the first output pipe 233. The second end of the second output pipe 234 is connected to the rotary seal device 300. When the rotary seal device 300 rotates, the first and second output pipes 233 and 234, as well as the pendant pipe 231, rotate synchronously.

[0052] The second ends 236 of the steam inlet pipe 220 and the steam outlet pipe 230 are both connected to a rotary sealing device 300, which includes a steam inlet and a steam outlet 221. The rotary sealing device 300 includes a sealing shaft 310 and a sealing sleeve 320. The sealing shaft 310 includes steps 311 and 312 disposed at first and second ends, and an air inlet groove 313 disposed between the steps. The first and second end steps 311, 312 (from the left) contact and abut the inner wall of the sealing sleeve 320. These first and second end steps 311, 312 maintain a seal at the contact surface with the inner wall of the sealing sleeve 320, and this sealing performance does not decrease as the sealing shaft 310 rotates.

[0053] Please refer to Figures 6 to 9 The air inlet groove 313 is provided with a plurality of radially extending through-holes 314. These radially extending through-holes 314 connect the air inlet groove 313 with a second axial opening 315 provided in the sealing shaft 310. The steam inlet pipe 220 includes the second axial opening 315. These radially extending through-holes 314 are capable of directing hot steam within the air inlet groove 313 into the second axial opening 315. Due to the airtight connection between the first and second end steps 311, 312, and the sealing sleeve 320, the air inlet groove 313 and the inner wall of the sealing sleeve 320 form a sealed cavity 313', which is connected to the air inlet 322 of the sealing sleeve 320.

[0054] Reference Figure 8 and Figure 9 The multiple radially extending through holes 314 within the air inlet groove 313 are axially offset from the air inlet 322. A distance d exists between the plane P1 where the air inlet 322 lies and the plane P2 where the multiple radially extending through holes 314 lie. This offset arrangement allows steam entering the air inlet 322 to first be buffered within the sealed cavity formed by the air inlet groove 313 and the inner wall of the sealing sleeve 320, flowing axially before passing through the multiple radially extending through holes 314 and into the second axial opening 315. This buffered steam can be more evenly and continuously delivered to the mold cavity 201 without causing fluctuations in steam flow.

[0055] The second port 235 of the second output pipe 234 is sealedly connected to a circular opening 318 in the center of the sealing disk 317. The second output pipe 234 is disposed within the second axial opening 315 of the sealing shaft 310. The second axial opening 315 forms an opening 319 on the second axial end surface of the sealing shaft 310; the exterior of the opening covers the sealing disk 317. The sealing disk 317 is connected to the steam outlet pipe 230, allowing steam from the second output pipe 234 to flow out while preventing steam within the second axial opening 315 from flowing out through the sealing disk 317. This ensures a seal between the steam inlet pipe 220 and the steam outlet pipe 230.

[0056] The sealing sleeve 320 includes a cylindrical cavity 321 that accommodates the first step 311 and the second step 312. The sealing sleeve 320 is provided with an air inlet 322 connected to the air inlet groove 313. Steam or condensed water flowing out through the second output pipe 234 enters the air outlet cavity 324 between the second step 312 of the sealing shaft 310 and the sealing sleeve 320. The sealing sleeve 320 is provided with an air outlet 323 connected to the air outlet cavity 324 between the second step and the sealing sleeve 320. The air inlet 322 of the sealing sleeve 320 is connected to a positive pressure steam source, and the air outlet is connected to a condensate recovery device.

[0057] In the preferred technical solution of the present invention, the positive pressure steam source includes a steam circulation device. The steam circulation device includes a steam output port, a condensate return port and a heating device. The condensate returned through the condensate return port is heated again by the heating device to become steam, and then output to the sealing sleeve 320 through the steam output port to realize heat circulation.

[0058] Please refer to Figure 7 A portion of the first output pipeline 233 and a portion of the second output pipeline 234 are disposed in the first axial opening 205 of the first support shaft 203, and a portion of the second output pipeline 234 is disposed in the second axial opening 315 of the sealing shaft 310. A support plate 330 is disposed in the first axial opening 205 to support the first output pipeline 233 and to contact the inner wall of the first axial opening 205.

[0059] Reference Figure 1 The support plate is a circular structure, the circular opening in the center is used to install the first output pipeline 233, and the circular openings 332 located around the central circular opening 331 are used to allow steam to pass through. The outer periphery of the circular support plate is supported on the inner wall of the first axial opening 205.

[0060] The working process of the reactor is described below.

[0061] The components of the reactor that begin to rotate under the drive of the driving device 210 include the first support shaft 203, the second support shaft 204, the sealing shaft 310, the stirring paddle 240 on the stirring shaft 200, the drop pipe 231, the first output pipe 233, and the second output pipe 234. Components such as the sealing sleeve 320 and the support bearing do not rotate.

[0062] Reference Figure 7 , Figure 7 The arrows in the figure indicate the steam flow direction. During the rotation of the above-mentioned components, a positive pressure hot steam source is applied to the air inlet 322 of the sealing sleeve 320. The hot steam flows through the air inlet groove 313, flows axially for a certain distance d, and then enters the multiple radially extending holes 314 after being buffered. Through the multiple radially extending holes 314, it enters the second axial opening 315 of the sealing shaft 310, and then enters the cavity 201 in the stirring shaft cover 202 through the first axial opening 205 and the air outlet in the first support shaft 203. It should be noted that because the first output pipe 233 and the second output pipe 234 are disposed within the first axial opening 205 in the first support shaft 203, the first output pipe 233 and the second output pipe 234 and the first axial opening 205 form an annular cavity that allows the input steam to pass through. The inflowing steam in this annular cavity is sealed from the steam outflow pipe 230.

[0063] The positive pressure hot steam releases heat after entering the stirring shaft 200, and heats the wastewater and sludge through the stirring shaft 200. Part of the hot steam forms condensed water due to condensation and is deposited at the bottom of the stirring shaft 200. Since the opening of the pendant pipe 231 inside the cavity 201 is always at the bottom of the cavity 201, when the water level of the condensed water reaches a certain height, the opening of the pendant pipe 231 is immersed in the condensed water. At this time, the positive pressure steam in the cavity 201 presses the condensed water at the bottom of the cavity 201 out of the cavity 201 through the pendant pipe 231. The condensed water flows through the pendant pipe 231, the first output pipe 233, the second output pipe 234, and the air outlet cavity 324 (such as the second step and the sealing sleeve 320) between the second step and the sealing sleeve 320. Figure 10 Due to the combined effect of the positive pressure steam and the drop pipe 231, the condensed water in the cavity 201 of the stirring shaft 200 always maintains an extremely low water level and does not affect the steam heating of the stirring shaft 200.

[0064] In summary, the present invention has at least two advantages over the prior art: First, heating the wastewater and sludge through the agitator shaft 200 allows for more uniform and sufficient heating of the agitated wastewater and sludge, saving energy. Second, the provision of the drop pipe 231 and the first and second output pipes 233 and 234 consistently maintains a low condensable water level within the cavity 201 of the agitator shaft 200, ensuring proper steam heating.

Claims

1. A reactor comprising a reaction chamber and a stirring shaft disposed within the reaction chamber; a stirring paddle is disposed on the stirring shaft and rotates within the reaction chamber driven by the stirring shaft; the stirring shaft includes a cavity, and a steam inlet pipe and a steam outlet pipe are disposed within the cavity; characterized in that: The first end of the steam outflow pipeline includes a pendant pipe, which is a flexible pipe made of flexible material. During the rotation of the stirring shaft, the front end of the pendant pipe always remains vertically downward, directly contacting the condensed water at the bottom of the cavity to discharge the condensed water formed in the stirring shaft cavity; A steam outlet leading to the mold cavity is provided at the first end of the steam inlet pipeline; the second ends of the steam inlet pipeline and the steam outflow pipeline are both connected to a rotary sealing device, which includes an air inlet and an air outlet; the rotary sealing device includes a sealing shaft and a sealing sleeve, the sealing shaft includes a first step provided at the first end and a second step at the second end, and an air inlet groove provided in the middle of the steps, a plurality of radially extending through holes are provided in the air inlet groove, and the plurality of radially extending through holes communicate with the air inlet groove and the second axial opening provided in the sealing shaft.

2. The reactor according to claim 1, characterized in that The stirring shaft includes a cylindrical stirring shaft cover, and a first support shaft and a second support shaft arranged at both ends of the stirring shaft cover; the steam inlet pipeline includes a first axial opening arranged in the first support shaft; and the steam outflow pipeline is arranged in the steam inlet pipeline.

3. The reactor according to claim 2, characterized in that The second axial opening forms an opening on the second axial end face of the sealing shaft; the outside of the opening is covered with a sealing disk, which is connected to the steam outflow pipeline so that the steam inlet pipeline and the steam outflow pipeline are sealed to each other.

4. The reactor according to claim 3, characterized in that The sealing sleeve includes a cylindrical cavity for accommodating the first step and the second step. The sealing sleeve is provided with an air inlet connected to the air inlet groove; the sealing sleeve is provided with an air outlet connected to the air outlet cavity between the second step and the sealing sleeve.

5. The reactor according to claim 4, characterized in that: It also includes a cylindrical first support shaft sleeve; the first support shaft sleeve is arranged on the first support shaft, and the first support shaft sleeve is installed at the first end opening of the stirring shaft cover; it also includes a cylindrical second support shaft sleeve, the second support shaft sleeve is arranged on the second support shaft, and the second support shaft sleeve is sleeved at the second end opening of the stirring shaft cover; the connection between the first support shaft and the first support shaft sleeve and the first end opening of the stirring shaft cover is a sealed connection; the connection between the second support shaft and the second support shaft sleeve and the second end opening of the stirring shaft cover is a sealed connection.

6. The reactor according to claim 4, characterized in that A plurality of radially extending through holes are provided in the air inlet groove and are staggered in axial position with respect to the air inlet.

7. The reactor according to claim 6, characterized in that A positive-pressure hot steam source is applied to the air inlet, and the hot steam flows through the air inlet groove into the multiple radial extension holes, and enters the cavity in the stirring shaft mask through the first axial opening in the first support shaft and the air outlet; the positive-pressure steam in the cavity presses the condensed water at the bottom of the cavity out of the cavity through the drop pipe, and the condensed water flows out through the air outlet cavity and the air outlet between the second step and the sealing sleeve.

8. The reactor according to claim 2, characterized in that: The first support shaft and the second support shaft are arranged in the first support bearing and the second support bearing, and the first support bearing and the second support bearing are fixed on the bracket of the reactor through a support plate assembly.

9. The reactor according to claim 8, characterized in that A driving device is provided at the end of the second support shaft away from the stirring shaft.

10. The reactor according to claim 1, characterized in that: The reaction chamber is connected to a vacuum source capable of pumping the internal pressure thereof to less than or equal to -90 kPa.

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