Epoxy chloropropane production device and production method

Abstract

The invention relates to the technical field of epichlorohydrin production, and discloses an epichlorohydrin production device and method, and the epichlorohydrin production device comprises a kettle body and a stirrer; the kettle body comprises a kettle body and a kettle cover connected to the top end of the kettle body, and a feeding hole is formed in the kettle cover; the stirrer comprises a central shaft which is rotationally connected to the kettle cover and extends along the vertical direction; the power part is mounted on the kettle cover, is matched with the central shaft, is used for driving the central shaft to rotate, and is positioned outside the kettle cover; the number of the stirring groups is at least one, each stirring group comprises a plurality of stirring blades, the stirring blades move up and down on the central shaft, and the moving tracks of the stirring blades on the central shaft are mutually independent; and the driving assembly is mounted on the central shaft and is used for driving the stirring blades to move up and down when the central shaft rotates. The mixing effect of the solution in the reaction kettle can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of epichlorohydrin production, and in particular to an epichlorohydrin production device and production method. Background Art

[0002] During the production process of epichlorohydrin, dichloropropanol and liquid alkali solution are mixed in a reactor to cause a saponification reaction between dichloropropanol and liquid alkali in the reactor.

[0003] At present, a stirrer is usually rotated in the reactor to mix and stir the dichloropropanol and the liquid alkali solution in the reactor. The stirrer has multiple blades distributed from top to bottom to mix and stir the solution. However, the stirring of the solution in the reactor by the multiple blades is limited to the current position, and the mixing effect between the upper and lower layer solutions of the reactor is weak, thereby limiting the mixing effect of the solution in the reactor. Summary of the invention

[0004] In order to improve the mixing effect of the solution in the reaction kettle, the present application provides an epichlorohydrin production device and a production method.

[0005] In the first aspect, the present application provides an epichlorohydrin production device, which adopts the following technical solution: An epichlorohydrin production device comprises: a kettle body and a stirrer; the kettle body comprises a kettle body and a kettle cover connected to the top of the kettle body, and the kettle cover has a feed inlet; the stirrer comprises A central axis is rotatably connected to the kettle cover and extends vertically; A power member, installed on the kettle cover and matched with the central shaft, used to drive the central shaft to rotate, and located outside the kettle cover; A stirring group, comprising at least one group, each of which comprises a plurality of stirring blades, the stirring blades move up and down on the central axis, and the movement trajectories of the stirring blades on the central axis are independent of each other; and The driving assembly is installed on the central shaft and is used to drive the stirring blade to move up and down when the central shaft rotates.

[0006] By adopting the above technical solution, the mixing effect of the solution in the reactor is enhanced by designing an agitator with stirring blades that move up and down. The stirring blades move independently on the central axis, breaking the limitations of traditional agitators on solution stirring, promoting the mixing between the upper and lower layers of the reactor solution, reducing the temperature difference between the layers of the solution in the reactor, and improving the mixing effect, thereby optimizing the production process of epichlorohydrin.

[0007] Optionally, the drive assembly includes A screw rod, corresponding to the stirring blades one by one, is rotatably connected to the central shaft, a movable groove for exposing the screw rod is provided on the outer peripheral wall of the central shaft, and the top end of the screw rod extends out of the central shaft; a gear, corresponding to each of the screw rods one by one, fixed and coaxially sleeved on a portion of the corresponding screw rod extending out of the central axis; and A gear ring, fixed to the outside of the kettle cover and coaxially surrounding the central axis, the inner circumference of the gear ring has meshing teeth distributed along the circumference of the gear ring, and all the gears on the central axis are meshed with the meshing teeth; Wherein, the stirring blade has a mounting portion, the mounting portion slides up and down in the movable groove of the central axis, and the mounting portion is simultaneously threadedly sleeved on the corresponding outer wall of the screw.

[0008] By adopting the above technical solution, the independent up and down movement of the stirring blade on the central axis is achieved through the mutual cooperation of the screw, the gear and the gear ring.

[0009] Optionally, a protective cover is provided on the outside of the kettle cover, the protective cover encloses the central axis extending out of the kettle cover, and the gear ring is fixed to the inner wall of the protective cover.

[0010] By adopting the above technical solution, a protective cover is added to the outside of the kettle cover, and the gear ring is fixed to the inner wall of the protective cover, which effectively protects the drive component from the influence of the external environment and extends the service life of the equipment.

[0011] Optionally, the number of teeth between the gears corresponding to the stirring blades in the same stirring group is different, and the rotation of the central axis can drive the stirring blades to rotate to a first state and a second state; when the stirring blades are in the first state, the stirring blades in the same stirring group are close to each other, and when the stirring blades are in the second state, the stirring blades in the same stirring group are evenly spaced along the axial direction of the central axis and away from each other.

[0012] By adopting the above technical solution, in the first state, the stirring blades are close to each other, thereby enhancing the stirring intensity in the local area; in the second state, the stirring blades are evenly spaced axially along the central axis and away from each other, thereby expanding the stirring range and improving the overall mixing effect.

[0013] Optionally, the stirring group has two groups, the gears in the two groups of the stirring groups correspond one to one, the number of teeth of the two corresponding gears is the same, and the screw threads in the two groups of the stirring groups are opposite; when the stirring blades are in the second state, the stirring blades in the two groups of the stirring groups are respectively close to the upper and lower ends of the kettle body.

[0014] By adopting the above technical solution, when the stirring blades are in the second state, the stirring blades in the two stirring groups are close to the upper and lower ends of the kettle body respectively. This layout further promotes the mixing of the upper and lower layer solutions of the reactor, improves the uniformity of the solution temperature and the reaction efficiency. At the same time, the number of gear teeth in the two stirring groups is consistent and the screw threads are in opposite directions, so that the two stirring blades can move synchronously and in opposite directions, thereby enhancing the stirring effect.

[0015] Optionally, a power telescopic member is provided on the kettle body, and the telescopic end of the power telescopic member is connected to the kettle cover, and the kettle cover and the kettle body are closed when the telescopic end of the power telescopic member is retracted.

[0016] By adopting the above technical solution and controlling the extension and retraction of the power retractable member, the automatic closing of the kettle cover and the kettle body is achieved.

[0017] Optionally, the kettle cover has a manhole.

[0018] By adopting the above technical solution, a manhole is provided on the reactor cover, which facilitates the staff to enter the reactor for inspection, cleaning and other operations, thereby improving the maintainability and ease of use of the equipment.

[0019] Optionally, a ladder frame extending from the top of the kettle body to the bottom of the kettle body is installed on the inner wall of the kettle body, and the ladder frame is close to the manhole.

[0020] By adopting the above technical solution, a ladder extending from the top to the bottom is installed on the inner wall of the reactor body and is close to the manhole, providing a safe passage and support for workers to enter the interior of the reactor.

[0021] In a second aspect, the present application provides a method for producing epichlorohydrin, which adopts the following technical solution: A method for producing epichlorohydrin, using the epichlorohydrin production device as described above, comprises the following steps: S1, preparing dichloropropanol and liquid alkali solution as raw materials, and feeding the raw materials into the kettle body from the feed inlet for reaction; S2, when the raw materials enter the kettle body, the power part drives the central shaft to rotate, and at the same time the driving component drives the stirring blade to move up and down to mix and stir the solution; S3, the produced epichlorohydrin product is discharged from the kettle body in the form of steam, and the saponified liquid containing sodium chloride is discharged from the tower bottom.

[0022] In summary, the present application includes at least one of the following beneficial effects: 1. When the central shaft rotates, it can simultaneously drive the stirring blade to rotate along the axis of the central shaft and move axially along the central shaft, thereby promoting the mixing of the various layers of solution in the kettle body and improving the effect and uniformity of solution mixing; 2. The screw threads corresponding to the two stirring groups are in opposite directions so that the stirring blades can be driven to move in opposite directions when the central shaft rotates, so as to further promote the stirring effect of the stirring blades when the stirring blades move. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 It is a schematic diagram of the structure when the central shaft and the stirring blade cooperate with each other and the stirring blade is in the second state in the embodiment of the present application; Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 yes Figure 2 A schematic diagram of the enlarged structure at B in the middle; Figure 5 It is a perspective view of an embodiment of the present application.

[0024] Explanation of the accompanying drawings: 1. kettle body; 2. kettle cover; 3. feed inlet; 4. central axis; 5. power part; 6. stirring group; 61. stirring blade; 7. driving assembly; 71. screw; 72. gear; 73. gear ring; 8. movable groove; 9. meshing teeth; 10. mounting part; 11. protective cover; 12. power telescopic part; 13. manhole; 14. ladder frame; 15. support frame; 16. assembly part. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-5 This application is described in further detail.

[0026] The present application embodiment discloses an epichlorohydrin production device. Figure 1 The epichlorohydrin production device includes a kettle and a stirrer, and the stirrer is installed on the kettle to stir the solution in the kettle. The kettle is provided with a heater (not shown in the figure) for heating the solution, which is a prior art and will not be described in detail here.

[0027] The kettle body includes a kettle body 1, a kettle cover 2 and a support frame 15. The kettle body 1 is in the shape of a hollow cylinder. The top of the kettle body 1 is penetrated to form an opening. The bottom of the kettle body 1 has a discharge port downward, and the discharge port is blocked when the solution is reacting and mixing. The support frame 15 is fixed on the four sides of the kettle body 1 to support the kettle body 1 so that the kettle body 1 maintains a state in which the axis extends vertically. The kettle cover 2 is in the shape of an arc-shaped cover body. The kettle cover 2 is detachably connected to the kettle body 1, and at least one feed port 3 connected to the inner cavity of the kettle cover 2 is formed on the top of the kettle cover 2. In this embodiment, there are two feed ports 3. The kettle cover 2 is connected to the delivery pipelines of dichloropropanol and liquid alkali solution through the two feed ports 3 respectively to deliver the raw materials to the kettle body 1. In addition, the top of the kettle cover 2 also has a steam outlet.

[0028] Specifically, a power telescopic member 12 with a telescopic end that telescopes vertically is installed on opposite sides of the kettle body 1. The base of the power telescopic member 12 is fixed on the outer wall of the kettle body 1, and the telescopic end of the power telescopic member 12 is detachably connected to a connecting ring extending from the outer wall of the kettle cover 2 by a bolt (not shown in the figure). When the telescopic end of the power telescopic member 12 is retracted, it drives the kettle cover 2 to move downward so that the kettle cover 2 can be closed and pressed against the top of the kettle body 1. When the telescopic end of the power telescopic member 12 is extended, it can drive the kettle cover 2 to move upward and move the kettle cover 2 away from the kettle body 1 so that the situation inside the kettle body 1 can be observed. The power telescopic member 12 is a power device that can perform telescopic power. In this embodiment, it is an electric telescopic rod, and in other embodiments, it can also be a cylinder.

[0029] Reference Figure 1 and Figure 2 The stirrer is mounted on the kettle cover 2, and includes a central shaft 4, a power part 5, a stirring group 6, and a driving assembly 7. The central shaft 4 is rotatably connected to the kettle cover 2 and extends into the kettle body 1 in the vertical direction, so that the central shaft 4 is coaxial with the kettle body 1, and the bottom end of the central shaft 4 extends to the bottom end close to the kettle body 1, and the top end of the central shaft 4 extends upward to the outside of the kettle cover 2. A protective cover 11 is fixedly mounted on the outer wall of the top of the kettle cover 2 by bolts (not shown in the figure), and the protective cover 11 covers the top end of the central shaft 4, and the protective cover 11 is cylindrical and coaxial with the central shaft 4.

[0030] The power piece 5 is a rotating motor capable of forward and reverse rotation. The base of the power piece 5 is installed on the outer wall of the top end of the protective cover 11. The output end of the power piece 5 extends into the protective cover 11 and is coaxially connected to the top of the central shaft 4. The power piece 5 can drive the central shaft 4 to rotate in the forward and reverse directions.

[0031] Reference Figure 1 and Figure 2 , the stirrer has two stirring groups 6, each stirring group 6 includes a plurality of stirring blades 61. In this embodiment, the number of stirring blades 61 in each stirring group 6 is four. In other embodiments, the number of stirring blades 61 in each stirring group 6 may also be three, five or six. All stirring blades 61 are mounted on the central shaft 4, and the stirring blades 61 in the two stirring groups 6 are spaced apart circumferentially along the central shaft 4. All stirring blades 61 can move up and down along the central shaft 4, and the moving trajectories of all stirring blades 61 on the central shaft 4 are independent of each other, so that the stirring blades 61 do not interfere with each other when moving up and down.

[0032] There is a driving component 7 between the central shaft 4 and the protective cover 11. When the central shaft 4 rotates, the driving component 7 drives the stirring blade 61 to move axially along the central shaft 4. When the central shaft 4 changes direction, the direction of movement of the stirring blade 61 on the central shaft 4 also changes.

[0033] Reference Figure 3 and Figure 4 Specifically, the driving assembly 7 includes a screw 71, a gear 72 and a gear ring 73. The screw 71 corresponds to the stirring blade 61 one by one, and the screw 71 is rotatably connected to the central shaft 4, and the axis of the screw 71 is parallel to the axis of the central shaft 4. Figure 2 A movable groove 8 corresponding to the screw 71 is opened on the outer wall of the central shaft 4, and the movable groove 8 also corresponds to the stirring blade 61. The movable groove 8 exposes the screw 71, and the upper and lower ends of the movable groove 8 are respectively close to the upper and lower ends of the central shaft 4, and the movable groove 8 does not penetrate the upper and lower ends of the central shaft 4.

[0034] The stirring blade 61 has a mounting portion 10 for mounting the stirring blade 61 on the central axis 4. The mounting portion 10 is block-shaped and is inserted into the corresponding movable groove 8. The outer peripheral wall of the mounting portion 10 is in contact with the groove wall of the central axis 4 at the movable groove 8, and the mounting portion 10 is simultaneously threadedly sleeved on the outer wall of the screw 71 in the movable groove 8, so that when the screw 71 rotates, it can drive the stirring blade 61 to move axially along the screw 71. In order to make the figure clear and neat, the thread of the screw 71 is not shown in the figure.

[0035] The gear 72 corresponds to the screw 71 one by one, and the gear 72 corresponds to the stirring blade 61 one by one. The top of the screw 71 extends upward from the top of the central axis 4, and the gear 72 is coaxially fixed and sleeved on the corresponding outer wall of the top of the screw 71, and the gear 72 is located in the protective cover 11.

[0036] The gear ring 73 is in the shape of a circular ring, and the outer wall of the gear ring 73 is fixed on the inner wall of the protective cover 11 so that the gear ring 73 is coaxial with the central axis 4. The inner wall of the gear ring 73 is arranged with meshing teeth 9 along its own circumference. The size of the meshing teeth 9 is consistent with the size of the teeth on the gear 72. All the teeth of the gear 72 are meshed with the meshing teeth 9 of the gear ring 73, and when the central axis 4 rotates, the gear 72 is driven to move along the inner circumference of the gear ring 73, so as to drive the gear 72 to rotate through the meshing between the gear 72 and the gear ring 73, so as to simultaneously drive the screw 71 matched with the gear 72 to rotate, thereby driving the mounting part 10 to move axially along the screw 71, so that the stirring blade 61 can mix the solution up and down while mixing the solution along the circumference of the central axis 4.

[0037] Reference Figure 2 and Figure 4Furthermore, in order to further improve the stirring effect, the stirring blades 61 in the same stirring group 6 move different distances when the central axis 4 rotates the same number of circles. Specifically, the distance moved axially along the central axis 4 by one stirring blade 61 is one, and the distances moved axially along the central axis 4 by the other three stirring blades 61 are two, three, and four, respectively. Therefore, in this embodiment, the number of teeth of the gears 72 in the same stirring group 6 is different. Except for the gear 72 with the smallest number of teeth in the same stirring group 6, the number of teeth of the other gears 72 is a multiple of the number of teeth of the gear 72 with the smallest number of teeth, and the multiple is a natural number that increases successively. Specifically, among the four gears 72 in the same stirring group 6, the number of teeth of the three gears 72 is two, three, and four times the number of teeth of the gear 72 with the smallest number of teeth, respectively. Please note that since the number of teeth of the gears 72 is different, in order to make the gears 72 mesh with the gear ring 73, the distances between the axes of the gears 72 with different numbers of teeth and the axis of the central axis 4 are also different.

[0038] The screws 71 corresponding to all stirring blades 61 have the same size, but the inconsistent number of teeth means that when the central shaft 4 rotates a certain number of times, the screws 71 in the same stirring group 6 rotate inconsistently. The screw 71 that cooperates with the gear 72 with a smaller number of teeth rotates more times, and the stirring blade 61 moves a longer distance along the axial direction of the screw 71, thereby achieving different distances of axial movement of the stirring blade 61 along the central shaft 4 when the central shaft 4 rotates the same number of times.

[0039] In addition, in other embodiments, the stirring blades 61 can be set so that the number of teeth of all gears 72 is the same, but the pitch of the screws 71 in the same stirring group 6 is inconsistent, so that the stirring blades 61 move different distances axially along the central axis 4 within the same time.

[0040] Reference Figure 2 Furthermore, the time for the power member 5 to drive the central shaft 4 to rotate in the forward direction is consistent with the time for the power member 5 to rotate in the reverse direction. After the power member 5 completes the forward rotation time of the central shaft 4, the stirring blade 61 is in the first state. After the power member 5 completes the reverse rotation time of the central shaft 4, the stirring blade 61 is in the second state.

[0041] Specifically, the central axis 4 is provided with a collection portion 16 at a position close to the bottom of the kettle body 1 and at a position close to the top of the kettle body 1. When the central axis 4 rotates in the forward direction, all the stirring blades 61 in the same stirring group 6 move in a direction close to one of the collection portions 16 of the central axis 4. When the stirring blades 61 are in the first state, all the stirring blades 61 in the same stirring group 6 are located in the same collection portion 16 of the central axis 4 and close to each other, so that all the mounting portions 10 in the same stirring group 6 are located in the same horizontal plane. When the central axis 4 rotates in the reverse direction, all the stirring blades 61 in the same stirring group 6 move in a direction close to another collection portion 16 of the central axis 4. When the stirring blades 61 are in the second state, the stirring blades 61 in the same stirring group 6 move away from each other, the distance between any two adjacent stirring blades 61 is the same, and the stirring blade 61 with the farthest movement distance is close to another collection portion 16 of the central axis 4.

[0042] In addition, the gears 72 in the two stirring groups 6 correspond to each other, the number of teeth of the corresponding gears 72 is also one, and the threads of the screws 71 of the two stirring groups 6 are opposite to each other, so that when the central axis 4 rotates, the stirring blades 61 in the two stirring groups 6 move in opposite directions on the central axis 4, and when the stirring blades 61 are in the first state, the stirring blades 61 in the two stirring groups 6 are respectively located on two collection parts 16 that are far away from each other on the central axis 4, thereby being able to further enhance the mixing effect of the solution when the stirring blades 61 move.

[0043] In addition, when the kettle body is cleaned after the reaction is completed, the operator usually enters the kettle body 1 to rinse the stirring blades 61. When the stirring blades 61 separate axially from each other along the central axis 4, the operator needs to stay at multiple heights and positions of the kettle body 1 to rinse the stirring blades 61. When the stirring blades 61 are moved to the first state, the stirring blades 61 are gathered at the upper and lower end collection parts 16 of the central axis 4. At this time, the operator only needs to stay at the position of the two collection parts 16 to rinse the stirring blades 61, thereby improving the convenience of cleaning the stirring blades 61.

[0044] Reference Figure 1 and Figure 5 Furthermore, a manhole 13 is opened on the kettle cover 2, and ladders 14 are installed on the inner walls of the kettle body 1 and the kettle cover 2. When the kettle cover 2 is closed on the kettle body 1, the ladder 14 on the kettle cover 2 is continuous with the ladder 14 on the kettle body 1, so that the operator can climb from the top of the kettle body 1 to the ladder 14 at the bottom of the kettle body 1, so as to facilitate the operator to move in the kettle body 1.

[0045] The present application also discloses a method for producing epichlorohydrin, which uses the above-mentioned epichlorohydrin production device and comprises the following steps: S1, prepare dichloropropanol and liquid alkali solution as raw materials, mix them by metering, and then feed the raw materials into the kettle body 1 from different feed ports 3 on the kettle body 1 for reaction; S2, when the raw materials enter the kettle body 1, the power member 5 drives the central shaft 4 to rotate alternately in forward and reverse directions, and through the meshing action of the gear 72 and the gear ring 73 and the cooperation of the stirring blade 61 and the screw 71, the stirring blade 61 is driven to rotate along the axis of the central shaft 4 in the kettle body 1, and move up and down along the axis of the central shaft 4, so as to mix the solution in the kettle body 1 through the stirring blade 61; S3, the produced epichlorohydrin product is discharged from the kettle body 1 in the form of steam and is subsequently treated by condensation and purification; at the same time, the saponified liquid containing sodium chloride is discharged from the bottom of the kettle body 1.

[0046] The implementation principle of an epichlorohydrin production device in an embodiment of the present application is as follows: when the solution enters the kettle body 1, the agitator is started, and the power member 5 drives the central shaft 4 to rotate, so as to drive the stirring blades 61 on the central shaft 4 to rotate along the axis of the central shaft 4. At the same time, the rotation of the central shaft 4 drives each screw 71 to rotate in cooperation with the gear 72 and the gear ring 73. The screw 71 rotates to drive the stirring blades 61 threadedly connected to the screw 71 to move axially along the screw 71, so as to drive the stirring blades 61 on the central shaft 4 to move axially along the central shaft 4 at the same time, so as to mix the solution.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An epichlorohydrin production device, characterized in that: include: A kettle body and a stirrer; the kettle body comprises a kettle body (1) and a kettle cover (2) connected to the top of the kettle body (1), and the kettle cover (2) has a feed inlet (3); the stirrer comprises A central shaft (4) is rotatably connected to the kettle cover (2) and extends vertically; A power member (5) is mounted on the kettle cover (2) and cooperates with the central shaft (4), is used to drive the central shaft (4) to rotate, and is located outside the kettle cover (2); A stirring group (6), comprising at least one group, each stirring group (6) comprising a plurality of stirring blades (61), the stirring blades (61) moving up and down on the central axis (4), and the movement trajectories of the stirring blades (61) on the central axis (4) being independent of each other; and A driving assembly (7) is mounted on the central shaft (4) and is used to drive the stirring blade (61) to move up and down when the central shaft (4) rotates.

2. The epichlorohydrin production device according to claim 1, characterized in that: The driving assembly (7) comprises A screw (71) corresponds to the stirring blade (61) one by one and is rotatably connected to the central shaft (4); a movable groove (8) for exposing the screw (71) is provided on the outer peripheral wall of the central shaft (4), and the top end of the screw (71) extends out of the central shaft (4); a gear (72) corresponding one to each of the screw rods (71), fixed and coaxially sleeved on a portion of the corresponding screw rod (71) extending out of the central axis (4); and a gear ring (73) fixed to the outside of the kettle cover (2) and coaxially surrounding the central shaft (4); the inner circumference of the gear ring (73) has meshing teeth (9) distributed along the circumference of the gear ring (73); all the gears (72) on the central shaft (4) are meshed with the meshing teeth (9); The stirring blade (61) has a mounting portion (10), the mounting portion (10) slides up and down in the movable groove (8) of the central shaft (4), and the mounting portion (10) is simultaneously threadedly sleeved on the outer wall of the corresponding screw rod (71).

3. An epichlorohydrin production device according to claim 2, characterized in that: The kettle cover (2) has a protective cover (11) on the outside, the protective cover (11) enclosing the central axis (4) extending out of the kettle cover (2), and the toothed ring (73) is fixed to the inner wall of the protective cover (11).

4. The epichlorohydrin production device according to claim 2, characterized in that: The gears (72) corresponding to the stirring blades (61) in the same stirring group (6) have different numbers of teeth, and the rotation of the central axis (4) can drive the stirring blades (61) to rotate to a first state and a second state; when the stirring blades (61) are in the first state, the stirring blades (61) in the same stirring group (6) are close to each other, and when the stirring blades (61) are in the second state, the stirring blades (61) in the same stirring group (6) are evenly spaced and spaced apart along the axial direction of the central axis (4) and are away from each other.

5. The epichlorohydrin production device according to claim 4, characterized in that: The stirring groups (6) include two groups, the gears (72) in the two groups of stirring groups (6) correspond to each other, the number of teeth of the two corresponding gears (72) is the same, and the threads of the screw rods (71) in the two groups of stirring groups (6) are in opposite directions; when the stirring blades (61) are in the second state, the stirring blades (61) in the two groups of stirring groups (6) are respectively close to the upper and lower ends of the kettle body (1).

6. The epichlorohydrin production device according to claim 1, characterized in that: The kettle body (1) is provided with a power telescopic member (12), the telescopic end of the power telescopic member (12) is connected to the kettle cover (2), and when the telescopic end of the power telescopic member (12) is retracted, the kettle cover (2) and the kettle body (1) are closed.

7. The epichlorohydrin production device according to claim 1, characterized in that: The kettle cover (2) is provided with a manhole (13).

8. The epichlorohydrin production device according to claim 7, characterized in that: A ladder frame (14) is installed on the inner wall of the kettle body (1) and extends from the top of the kettle body (1) to the bottom of the kettle body (1), and the ladder frame (14) is close to the manhole (13).

9. A method for producing epichlorohydrin, using the epichlorohydrin production device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, preparing dichloropropanol and liquid alkali solution as raw materials, and feeding the raw materials into the kettle body (1) from the feed inlet (3) for reaction; S2, when the raw materials enter the kettle body (1), the power member (5) drives the central shaft (4) to rotate, and at the same time the driving component (7) drives the stirring blade (61) to move up and down to mix and stir the solution; S3, the produced epichlorohydrin product is discharged from the kettle body (1) in the form of steam, and the saponified liquid containing sodium chloride is discharged from the tower bottom.

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