Continuous mixing and batching system for methylamine synthesis

Abstract

The invention discloses a continuous mixing and batching system for methylamine synthesis, and relates to the technical field of methylamine synthesis, the continuous mixing and batching system comprises a methanol storage tank, a liquid ammonia storage tank, an azeotrope storage tank, a mixed amine storage tank and a mixing kettle, the methanol storage tank, the liquid ammonia storage tank, the azeotrope storage tank and the mixed amine storage tank are connected with the mixing kettle through pipelines, a low-temperature heat exchanger, a start vaporizer, a three-stage high-temperature heat exchanger, a reactor, a rectifying tower and a tail gas absorption tower are arranged at the rear section of the mixing kettle. According to the invention, all component materials firstly enter the feeding premixer through the feeding pipeline, and the atomization nozzle, located at one end of the feeding premixer, of the feeding pipeline atomizes the materials and then impacts and mixes the materials, so that an efficient premixing effect is achieved. When the first stirring mixer located on the outer side of the stirring shaft and located in the feeding premixer rotates along with the stirring shaft, the stirring resistance can be reduced, and the material mixing uniformity can be further improved through impact and mesh dispersion.

Description

Technical Field

[0001] The present invention relates to the technical field of methylamine synthesis, in particular to a continuous mixing and batching system for methylamine synthesis. Background Art

[0002] In the field of methylamine synthesis, traditional continuous mixing and batching systems face numerous challenges in practical application. For one thing, due to limitations in the design of the mixing device, efficient and uniform mixing of the components is difficult to achieve, directly impacting the stability of subsequent reactions and product quality. For example, in some systems, materials entering the mixing equipment rely solely on a simple stirring mechanism for mixing, resulting in uneven mixing and significant local concentration variations.

[0003] On the other hand, in the exhaust gas treatment process, the traditional spray absorption method lacks sufficient spray force and a limited spray range, resulting in insufficient contact between the exhaust gas and the absorption liquid, low absorption efficiency, and difficulty meeting environmental protection requirements. Furthermore, the existing system also suffers from poor dispersion and low conveying efficiency during material dispersion and conveying, all of which hinder the efficiency and quality improvement of methylamine synthesis production. Summary of the Invention

[0004] In order to solve the problems mentioned in the above background technology, the present invention provides a continuous mixing and batching system for methylamine synthesis.

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

[0006] A continuous mixing and batching system for methylamine synthesis, comprising a methanol storage tank, a liquid ammonia storage tank, an azeotrope storage tank, a mixed amine storage tank, and a mixing kettle, wherein the methanol storage tank, the liquid ammonia storage tank, the azeotrope storage tank, and the mixed amine storage tank are connected to the mixing kettle via pipelines, and the rear section of the mixing kettle is provided with a low-temperature heat exchanger, a start-up vaporizer, a three-stage high-temperature heat exchanger, a reactor, a distillation tower, and a tail gas absorption tower;

[0007] The top of the mixing kettle is provided with a plurality of feeding pipes, the bottom of the mixing kettle is provided with a discharge port, and the interior of the mixing kettle is provided with a stirring mechanism;

[0008] The stirring mechanism includes a stirring shaft, the top end of which extends to the outside of the mixing kettle and is driven to rotate by a motor;

[0009] A feed premixer is provided inside the mixing kettle;

[0010] The tail gas absorption tower includes a circulation pump and a sprayer, and the circulation pump transports the absorption liquid in the tail gas absorption tower kettle to the sprayer at the top of the tail gas absorption tower;

[0011] The sprayer includes a cylindrical liquid reservoir, the interior of which is divided into multiple sector-shaped areas by a partition, each sector-shaped area is provided with a sector-shaped piston plate, a liquid injection groove is provided at the center of the cylindrical liquid reservoir, and the liquid injection groove is connected to each sector-shaped area through a rectangular opening, a mounting frame is provided above the sprayer, and a plurality of elastic telescopic rods are provided at the bottom end of the mounting frame, the movable ends of the elastic telescopic rods are movably extended to the sprayer and correspond one-to-one with each sector-shaped piston plate, and a plurality of spray heads are provided at the bottom end of the sprayer.

[0012] Preferably, a polymerization hopper is provided at the bottom end of the feed premixer, and a discharge pipe is provided below the polymerization hopper;

[0013] The stirring shaft passes through the feed premixer, the polymerization hopper and the discharge pipe, and the plurality of feed pipes are all communicated with the feed premixer.

[0014] Preferably, a first stirring mixer is fixed on the outer side of the stirring shaft at an inner position of the feed premixer. The first stirring mixer is an arc-shaped plate structure and is provided with a first mixing mesh.

[0015] Preferably, a discharge screw is provided on the outside of the stirring shaft and inside the discharge pipe, and a gear disc is fixedly mounted on the outside of the stirring shaft, with the top end of the gear disc in movably contact with the bottom end of the discharge pipe.

[0016] Preferably, a sealing cover is fixed to the outside of the discharge pipe, and multiple liquid outlet pipes are rotatably installed on the outside of the discharge pipe inside the sealing cover. A first gear is fixed to the outside of the liquid outlet pipe, and the multiple first gears are all engaged with the gear disc.

[0017] Preferably, one end of the liquid outlet pipe extends to the outside of the sealing cover and is fixed with a vertical distribution pipe, and a plurality of horizontal distribution pipes are fixed to a side of the vertical distribution pipe away from the liquid outlet pipe.

[0018] Preferably, a second stirring mixer is fixed to the bottom end of the stirring shaft, the second stirring mixer is a stirring blade, and an annular blocker is fixed to the top end of the stirring blade, and a second mixing mesh is provided on the annular blocker.

[0019] Preferably, the top of the cylindrical liquid reservoir is connected to a liquid inlet pipe, which is communicated with the liquid injection tank. A sealing plate is rotatably installed below the cylindrical liquid reservoir through a rotating shaft, and a plurality of fan-shaped through holes are arranged at intervals on the sealing plate.

[0020] Preferably, the top end of the rotating shaft extends to the inside of the liquid injection tank and is connected to a plurality of sealing strips, the plurality of sealing strips are arranged at intervals, and the plurality of sealing strips are respectively located above the plurality of fan-shaped through holes.

[0021] Preferably, a driving ring is fixed to the top of the blocking plate, a section of meshing teeth is continuously distributed on the outside of the driving ring, a rotating column is installed on one side of the driving ring through a bracket, and a second gear is fixed to the bottom end of the rotating column.

[0022] Preferably, a cylinder is fixed on the bracket, a driving rod is fixed to the output shaft of the cylinder, a spiral guide groove is opened on the outer side of the rotating column, and one end of the driving rod extends into the spiral guide groove.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the present invention, each component material first enters the feed premixer through the feed pipe. The feed pipe is located at the atomizing nozzle at one end of the feed premixer to atomize the material and then impact and mix it with each other, thereby achieving efficient premixing. The first stirring mixer located outside the stirring shaft inside the feed premixer has an arc-shaped plate structure and a first mixing mesh. When rotating with the stirring shaft, it can not only reduce the stirring resistance, but also further improve the material mixing uniformity through impact and mesh dispersion. The discharge screw inside the discharge pipe pressurizes and conveys the material downward. At the same time, the stirring shaft drives the gear disk to rotate, and drives the liquid outlet pipe to rotate through engagement, so that the vertical distribution pipe and the horizontal distribution pipe rotate continuously, spraying and dispersing the material at high speed, assisting stirring and improving mixing efficiency. The second stirring mixer at the bottom end of the stirring shaft and the annular blocker at the top further stir and disperse the material. The second mixing mesh on the annular blocker can further improve the material dispersion effect, ensuring that the material is fully mixed in the mixing kettle.

[0025] 2. The design of the sprayer in the tail gas absorption tower of the present invention achieves alternating spraying of the absorption liquid through the rotation of the sealing plate, which coordinates the fan-shaped area, fan-shaped piston plate, elastic telescopic rod and other structures in the cylindrical liquid reservoir. The circulation pump transports the absorption liquid to the liquid injection tank, and then enters each fan-shaped area. The sealing plate rotates to alternately block half of the spray head, causing the absorption liquid to accumulate in half of the fan-shaped area. The elastic telescopic rod is compressed. When the sealing plate rotates, the elastic telescopic rod pushes the absorption liquid to spray out at high speed, and the other half of the fan-shaped area begins to accumulate absorption liquid. This repetitive process increases the spraying intensity and range of the absorption liquid, promotes full contact between the exhaust gas and the absorption liquid, significantly improves the absorption effect, and meets environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a three-dimensional diagram of the mixing kettle of the present invention;

[0028] Figure 2 A top view of the mixing kettle of the present invention;

[0029] Figure 3 This is a cross-sectional view of the mixing kettle of the present invention from the main perspective;

[0030] Figure 4 Schematic diagram of the internal structure of the mixing kettle of the present invention;

[0031] Figure 5 This is a cross-sectional view of the feed premixer of the present invention from a main perspective;

[0032] Figure 6 for Figure 5 A magnified detail of position A in the middle;

[0033] Figure 7 Schematic diagram of the internal structure of the feed premixer;

[0034] Figure 8 is a flow chart of the present invention;

[0035] Figure 9 This is a front view of the tail gas absorption tower of the present invention;

[0036] Figure 10 This is a first-perspective perspective view of a sprayer in a tail gas absorption tower of the present invention;

[0037] Figure 11 A second perspective view of the showerhead of the present invention;

[0038] Figure 12 A bottom view of the cylindrical liquid reservoir of the present invention;

[0039] Figure 13 A three-dimensional diagram of a cylindrical liquid reservoir of the present invention;

[0040] Figure 14 Schematic diagram of the internal sector area distribution of the cylindrical liquid reservoir of the present invention;

[0041] Figure 15 This is a schematic diagram of the connection between the rotating shaft and the sealing strip of the present invention;

[0042] In the figure: 1. Mixing kettle; 101. Feed pipe; 102. Discharge port; 2. Stirring shaft; 201. Motor; 202. Second stirring mixer; 203. Annular baffle; 204. First stirring mixer; 205. Discharge screw; 206. Toothed disc; 3. Feed premixer; 301. Polymerization hopper; 302. Discharge pipe; 4. Sealing cover; 401. Liquid outlet pipe; 402. Vertical distribution pipe; 403. Horizontal distribution pipe; 5. Methanol storage tank; 501. Liquid ammonia storage tank; 502. Azeotrope storage tank; 503. Low-temperature heat exchanger; 504. Start-up vaporizer; 505. Three-stage high-temperature heat exchanger; 506. Reactor Response device; 507. Distillation tower; 508. Mixed amine storage tank; 6. Tail gas absorption tower; 7. Circulation pump; 8. Sprinkler; 801. Cylindrical liquid reservoir; 802. Sprinkler head; 803. Sector-shaped area; 804. Sector-shaped piston plate; 805. Liquid injection groove; 806. Rectangular opening; 807. Movable end; 808. Elastic telescopic rod; 809. Mounting bracket; 810. Liquid inlet pipe; 811. Sealing plate; 812. Sector-shaped through hole; 813. Driving ring; 814. Rotating column; 815. Second gear; 816. Helical guide groove; 817. Cylinder; 818. Driving rod; 819. Rotating shaft; 820. Sealing strip. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0044] Example 1

[0045] Reference Figure 1-15A continuous mixing and batching system for methylamine synthesis includes a methanol storage tank 5, a liquid ammonia storage tank 501, an azeotrope storage tank 502, a mixed amine storage tank 508 and a mixing kettle 1. The methanol storage tank 5, the liquid ammonia storage tank 501, the azeotrope storage tank 502 and the mixed amine storage tank 508 are connected to the mixing kettle 1 through pipelines. The rear section of the mixing kettle 1 is provided with a low-temperature heat exchanger 503, a start-up vaporizer 504, a three-stage high-temperature heat exchanger 505, a reactor 506, a distillation tower 507 and a tail gas absorption tower 6. There are four feed pipes 101. The four raw materials of methanol, liquid ammonia, azeotrope and mixed amine are respectively fed from their respective storage tanks through filters and then enter the mixing kettle 1 through the four feed pipes 101 for mixing. After the mixing is completed, The raw material mixture is discharged through the discharge port 102, and enters the low-temperature heat exchanger 503 at 40°C. After heat exchange with the synthesis gas, the temperature rises to about 125°C, and then enters the start-up vaporizer 504 for heat exchange with the bottom liquid of the reactor 506, so that the temperature is increased by about 140°C. At this time, the raw material mixture is completely vaporized, and then enters the three-stage high-temperature heat exchanger 505 in series for heating, and exchanges heat with the reaction gas coming out of the reactor 506. After the temperature is increased to about 320°C, it enters the electric heating furnace and is heated to 380°C~385°C. It then enters the reactor 506 for reaction, and the product is passed into the distillation tower 507 for distillation. The tail gas generated by the distillation tower 507 is absorbed and treated by the tail gas absorption tower 6.

[0046] The top of the mixing kettle 1 is provided with multiple feeding pipes 101, the bottom of the mixing kettle 1 is provided with a discharge port 102, and the interior of the mixing kettle 1 is provided with a stirring mechanism. The stirring shaft 2 is driven by the motor 201 to rotate to stir the various component materials to ensure that they are fully mixed and discharged from the discharge port 102 to maintain the stability of the subsequent reaction.

[0047] The stirring mechanism includes a stirring shaft 2, the top end of which extends to the outside of the mixing kettle 1 and is driven to rotate by a motor 201;

[0048] A feed premixer 3 is provided inside the mixing kettle 1. A polymerization bucket 301 is provided at the bottom end of the feed premixer 3. A discharge pipe 302 is provided below the polymerization bucket 301. The stirring shaft 2 passes through the feed premixer 3, the polymerization bucket 301 and the discharge pipe 302. A plurality of feed pipes 101 are connected to the feed premixer 3. Each component material first enters the feed premixer 3 through the feed pipe 101. Each feed pipe 101 is provided with an atomizing nozzle at one end of the feed premixer 3, and the spray directions of each atomizing nozzle correspond to each other. After the component materials are atomized, they impact and mix with each other, achieving the purpose of efficient premixing. After mixing, they are gathered through the polymerization bucket 301 and then discharged through the discharge pipe 302, and are further stirred and mixed inside the mixing kettle 1.

[0049] The tail gas absorption tower 6 includes a circulation pump 7 and a sprayer 8. The circulation pump 7 transports the absorption liquid in the tail gas absorption tower 6 to the sprayer 8 at the top of the tail gas absorption tower 6. The absorption liquid in the tail gas absorption tower 6 is pumped into the sprayer 8 for circulation spraying by the circulation pump 7.

[0050] Example 2

[0051] Reference Figure 1-15 The difference between this embodiment and embodiment 1 is that a first stirring mixer 204 is fixed to the outside of the stirring shaft 2 and inside the feed premixer 3. The first stirring mixer 204 is an arc-shaped plate structure and has a first mixing mesh.

[0052] The material sprayed from the atomizing nozzle on the feed pipe 101 first collides with the surface of the first stirring mixer 204, and the first stirring mixer 204 rotates with the stirring shaft 2 to stir the material, thereby dispersing the material and further improving the uniformity of mixing the various component materials. The arc structure of the first stirring mixer 204 can reduce the resistance generated during the stirring process and achieve energy saving. The material passes through the first stirring mixer 204 through the first mixing mesh, which can further improve the material dispersion effect.

[0053] Among them, the outside of the stirring shaft 2 is located inside the discharge pipe 302 and is provided with a discharge screw 205. A toothed disc 206 is fixedly installed on the outside of the stirring shaft 2. The top of the toothed disc 206 is in active contact with the bottom end of the discharge pipe 302. A sealing cover 4 is fixed to the outside of the discharge pipe 302. The outside of the discharge pipe 302 is located inside the sealing cover 4 and is rotatably installed with multiple liquid outlet pipes 401. A first gear is fixed to the outside of the liquid outlet pipe 401. The multiple first gears are all engaged with the toothed disc 206. One end of the liquid outlet pipe 401 extends to the outside of the sealing cover 4 and is fixed with a vertical distribution pipe 402. A plurality of horizontal distribution pipes 403 are fixed to the side of the vertical distribution pipe 402 away from the liquid outlet pipe 401.

[0054] The presence of the discharge screw 205 can pressurize and transport the material gathered in the polymerization bucket 301 due to gravity, and then spray it out at high speed through the liquid outlet pipe 401. Since the stirring shaft 2 drives the toothed disc 206 to rotate, and the toothed disc 206 engages with the first gear on the liquid outlet pipe 401, it can drive the liquid outlet pipe 401 to rotate, thereby driving the vertical distribution pipe 402 and the horizontal distribution pipe 403 to rotate continuously. On the one hand, the material dispersion effect is improved. On the other hand, the movement of the horizontal distribution pipe 403 can also assist in stirring the material and improve the material mixing efficiency.

[0055] The bottom end of the stirring shaft 2 is fixed with a second stirring mixer 202, which is a stirring blade, and the top end of the stirring blade is fixed with an annular blocker 203, which is provided with a second mixing mesh;

[0056] The material sprayed out from the horizontal distribution pipe 403 will directly impact the annular blocker 203, and the material passes through the annular blocker 203 through the second mixing mesh, further improving the material dispersion effect.

[0057] Example 3

[0058] Reference Figure 1-15 The difference between this embodiment and embodiment 1 is that the sprayer 8 includes a cylindrical liquid reservoir 801, the interior of the cylindrical liquid reservoir 801 is divided into a plurality of sector-shaped areas 803 by a partition, each sector-shaped area 803 is provided with a sector-shaped piston plate 804, a liquid injection groove 805 is provided at the center of the cylindrical liquid reservoir 801, and the liquid injection groove 805 is connected to each sector-shaped area 803 through a rectangular opening 806, a mounting frame 809 is provided above the sprayer 8, and a plurality of elastic telescopic rods 808 are provided at the bottom end of the mounting frame 809, and the movable ends 807 of the elastic telescopic rods 808 are movably extended to the sprayer 8 and connected to the nozzle 801. Each sector-shaped piston plate 804 corresponds to each other one by one. A plurality of spray heads 802 are provided at the bottom end of the sprinkler 8. A liquid inlet pipe 810 is connected to the top end of the cylindrical liquid reservoir 801. The liquid inlet pipe 810 is communicated with the liquid injection tank 805. A sealing plate 811 is rotatably installed below the cylindrical liquid reservoir 801 through a rotating shaft 819. A plurality of sector-shaped through holes 812 are arranged at intervals on the sealing plate 811. The top end of the rotating shaft 819 extends to the interior of the liquid injection tank 805 and is connected to a plurality of sealing strips 820. The plurality of sealing strips 820 are arranged at intervals, and the plurality of sealing strips 820 are respectively located above the plurality of sector-shaped through holes 812.

[0059] The tail gas is introduced into the tail gas absorption tower 6 from the bottom inlet, and the tail gas flows from bottom to top. The absorption liquid is sprayed from the spray head 802. There are multiple packing layers inside the tail gas absorption tower 6 to promote full contact between the tail gas and the absorption liquid.

[0060] The liquid outlet of the circulation pump 7 is connected to the liquid inlet pipe 810 through a pipeline. The liquid inlet pipe 810 passes the circulating absorption liquid into the liquid injection tank 805, and then the absorption liquid enters each fan-shaped area 803 through the rectangular opening 806. There are multiple groups of spray heads 802, and each group of spray heads 802 corresponds to a fan-shaped area 803. The position of the fan-shaped through hole 812 can be changed by rotating the blocking plate 811. At the same time, only half of the spray heads 802 are aligned with the fan-shaped through hole 812, and the remaining spray heads 802 are blocked. Since the rotating shaft 819, the blocking strip 820 and the blocking plate 811 are fixed to each other, the rotation is synchronous. The rectangular opening 806 in the fan-shaped area 803 corresponding to the blocked spray head 802 is staggered with the blocking strip 820, and the remaining rectangular openings 806 are staggered with the blocking strip 820. 06 is blocked by the blocking strip 820, and half of the spray heads 802 can be blocked alternately during operation, so that the absorption liquid accumulates in half of the fan-shaped area 803. During the accumulation process, the fan-shaped piston plate 804 at the corresponding position moves upward, and the elastic telescopic rod 808 connected thereto is compressed. When the blocking plate 811 rotates an angle, so that this half of the spray heads 802 are aligned with the fan-shaped through holes 812, the elastic force accumulated in the elastic telescopic rod 808 will push the absorption liquid to be sprayed out from the spray heads 802 at a high speed, and at the same time, the absorption liquid begins to accumulate in the other half of the fan-shaped area 803. This is repeated, and the absorption liquid can be continuously and alternately sprayed from half of the spray heads 802. The accumulation of absorption liquid and the spraying of absorption liquid are carried out simultaneously, which can increase the spraying intensity of the absorption liquid, increase the spraying range, and improve the absorption effect.

[0061] A driving ring 813 is fixed to the top of the blocking plate 811. A section of meshing teeth is continuously distributed on the outside of the driving ring 813. A rotating column 814 is mounted on one side of the driving ring 813 through a bracket. A second gear 815 is fixed to the bottom end of the rotating column 814. A cylinder 817 is also fixed to the bracket. A driving rod 818 is fixed to the output shaft of the cylinder 817. A spiral guide groove 816 is opened on the outside of the rotating column 814. One end of the driving rod 818 extends into the spiral guide groove 816.

[0062] By controlling the extension and retraction of the cylinder 817, the driving rod 818 can be driven to move up and down. Due to the limiting cooperation between the driving rod 818 and the spiral guide groove 816, the linear driving force of the control cylinder 817 can be converted into the reciprocating rotation of the rotating column 814, which can drive the second gear 815 to rotate back and forth, thereby driving the driving ring 813 to rotate back and forth through meshing, thereby driving the sealing plate 811 to rotate back and forth, thereby switching between the two positions.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In the present invention, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A continuous mixing and batching system for methylamine synthesis, comprising a methanol storage tank (5), a liquid ammonia storage tank (501), an azeotrope storage tank (502), a mixed amine storage tank (508) and a mixing kettle (1), characterized in that: The methanol storage tank (5), the liquid ammonia storage tank (501), the azeotrope storage tank (502) and the mixed amine storage tank (508) are connected to the mixing kettle (1) through pipelines. The rear section of the mixing kettle (1) is provided with a low-temperature heat exchanger (503), a start-up vaporizer (504), a three-stage high-temperature heat exchanger (505), a reactor (506), a distillation tower (507) and a tail gas absorption tower (6); The top of the mixing kettle (1) is provided with a plurality of feed pipes (101), the bottom of the mixing kettle (1) is provided with a discharge port (102), and a stirring mechanism is provided inside the mixing kettle (1); The stirring mechanism comprises a stirring shaft (2), the top end of which extends to the outside of the mixing kettle (1) and is driven to rotate by a motor (201); A feed premixer (3) is provided inside the mixing kettle (1); The tail gas absorption tower (6) comprises a circulation pump (7) and a sprayer (8), wherein the circulation pump (7) transports the absorption liquid in the bottom of the tail gas absorption tower (6) to the sprayer (8) at the top of the tail gas absorption tower (6); The sprayer (8) includes a cylindrical liquid reservoir (801), the interior of the cylindrical liquid reservoir (801) is divided into a plurality of sector-shaped areas (803) by a partition, each sector-shaped area (803) is provided with a sector-shaped piston plate (804), a liquid injection groove (805) is provided at the center of the cylindrical liquid reservoir (801), and the liquid injection groove (805) is connected to each sector-shaped area (803) through a rectangular opening (806), a mounting frame (809) is provided above the sprayer (8), and a plurality of elastic telescopic rods (808) are provided at the bottom end of the mounting frame (809), and the movable ends (807) of the elastic telescopic rods (808) are movably extended to the sprayer (8) and correspond one-to-one with each sector-shaped piston plate (804), and a plurality of spray heads (802) are provided at the bottom end of the sprayer (8).

2. A continuous mixing and batching system for methylamine synthesis according to claim 1, characterized in that: The bottom end of the feed premixer (3) is provided with a polymerization bucket (301), and a discharge pipe (302) is provided below the polymerization bucket (301); The stirring shaft (2) passes through the feed premixer (3), the polymerization hopper (301) and the discharge pipe (302), and the plurality of feed pipes (101) are all connected to the feed premixer (3).

3. The continuous mixing and batching system for methylamine synthesis according to claim 1, characterized in that: A first stirring mixer (204) is fixed on the outside of the stirring shaft (2) at an internal position of the feed premixer (3); the first stirring mixer (204) is an arc-shaped plate structure, and a first mixing mesh is provided on the first stirring mixer (204).

4. The continuous mixing and batching system for methylamine synthesis according to claim 1, characterized in that: A discharge screw (205) is provided on the outside of the stirring shaft (2) and located inside the discharge pipe (302). A toothed disc (206) is fixedly mounted on the outside of the stirring shaft (2), and the top end of the toothed disc (206) is in movable contact with the bottom end of the discharge pipe (302).

5. A continuous mixing and batching system for methylamine synthesis according to claim 4, characterized in that: A sealing cover (4) is fixed to the outside of the discharge pipe (302), and multiple liquid outlet pipes (401) are rotatably mounted on the outside of the discharge pipe (302) located inside the sealing cover (4). A first gear is fixed to the outside of the liquid outlet pipe (401), and the multiple first gears are all meshed with the gear wheel (206).

6. A continuous mixing and batching system for methylamine synthesis according to claim 5, characterized in that: One end of the liquid outlet pipe (401) extends to the outside of the sealing cover (4) and is fixed with a vertical distribution pipe (402), and a plurality of horizontal distribution pipes (403) are fixed on a side of the vertical distribution pipe (402) away from the liquid outlet pipe (401).

7. A continuous mixing and batching system for methylamine synthesis according to claim 6, characterized in that: A second stirring mixer (202) is fixed to the bottom end of the stirring shaft (2), the second stirring mixer (202) is a stirring blade, and an annular blocker (203) is fixed to the top end of the stirring blade, and a second mixing mesh is provided on the annular blocker (203).

8. The continuous mixing and batching system for methylamine synthesis according to claim 1, characterized in that: The top end of the cylindrical liquid reservoir (801) is connected to a liquid inlet pipe (810), which is in communication with the liquid injection tank (805). A sealing plate (811) is rotatably mounted below the cylindrical liquid reservoir (801) via a rotating shaft (819), and a plurality of fan-shaped through holes (812) are arranged at intervals on the sealing plate (811).

9. A continuous mixing and batching system for methylamine synthesis according to claim 8, characterized in that: The top end of the rotating shaft (819) extends to the interior of the liquid injection groove (805) and is connected to a plurality of sealing strips (820). The plurality of sealing strips (820) are arranged at intervals, and the plurality of sealing strips (820) are respectively located above the plurality of fan-shaped through holes (812).

10. A continuous mixing and batching system for methylamine synthesis according to claim 9, characterized in that: A driving ring (813) is fixed to the top of the blocking plate (811), a section of meshing teeth is continuously distributed on the outside of the driving ring (813), a rotating column (814) is mounted on one side of the driving ring (813) via a bracket, and a second gear (815) is fixed to the bottom end of the rotating column (814).

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