Stirring reaction kettle with feeding distributor and use method

Abstract

The invention provides a stirring reaction kettle with a feeding distributor and a using method, and belongs to the field of chemical engineering, the stirring reaction kettle is composed of a reaction kettle body, a stirring device and a feeding distributor, the stirring device and the feeding distributor are located in the reaction kettle body, and the stirring device does not make contact with the feeding distributor. The feeding distributor is of a multi-stage fractal structure and comprises a main feeding channel, a first-stage flow dividing channel, a first-stage feeding channel,..., an Nth-stage flow dividing channel and an Nth-stage feeding channel, the structural design comprises but is not limited to a rotational symmetry distribution mode, and the structural design can be adjusted according to needs. Under the unique fractal structure design, materials are divided into multiple strands of materials which are symmetrical about the axis of the reaction kettle body at the outlet of each stage of flow dividing channel, and finally flow out of the multiple feed ports with the same flow, so that symmetrical distribution in the horizontal direction is realized. The reaction kettle effectively solves the problem of non-uniform material mixing caused by a single feed port of a traditional reaction kettle, and is beneficial to improving the product quality; the mode of adding the feeding distributor is simple and convenient to adjust, and the stirring power is not increased.

Description

Technical Field

[0001] The invention belongs to the field of chemical industry and relates to a reaction kettle, in particular to a stirring reaction kettle with a feed distributor. Background Art

[0002] Stirred reactors play an important role in industrial production. Their core function is to strengthen material mixing and chemical reaction processes. Stirred reactors can mix reactants, increase the probability of molecular collisions, accelerate chemical reactions, improve reaction selectivity, and regulate product quality by changing stirring conditions to produce products that meet different performance requirements. Therefore, the mixing effect of stirred reactors has an important impact on product quality. Generally, the mixing performance is enhanced by changing the shape, installation position, and rotation speed of the stirring paddle, but sometimes it is still difficult to achieve the mixing effect, and the stirring power increases significantly.

[0003] Traditional reactors are usually provided with a single feed inlet. Materials enter from the single inlet and concentrate on a certain area, which easily causes material aggregation, is not conducive to mixing, and affects product quality. The present invention provides a stirred reactor with a feed distributor. By adding a feed distributor, the single feed inlet is changed into multiple feed inlets, which can disperse materials, effectively enhance mixing, and will not affect the stirring power. Summary of the invention

[0004] In order to control product performance and improve product quality, the present invention proposes a stirred reactor with a feed distributor, which is designed to increase the number of feed ports and change the position distribution of the feed ports through the feed distributor to strengthen the mixing and reaction process of the reactor. Under the action of the feed distributor, the material enters the reactor in a horizontal distribution manner, which enhances its distribution uniformity from the source, provides good initial conditions for its subsequent mixing in the reactor, is conducive to promoting the reaction process, and improves the final product quality, while the stirring power does not change.

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

[0006] A stirred reactor with a feed distributor is used to solve the problem of uneven material mixing caused by a single feed port in a traditional reactor, strengthen the mixing reaction process, and improve product quality, including a feed distributor, a reactor body, and a stirring device. The feed distributor is located inside the reactor body and has a multi-level fractal structure, which can solve the problem of uneven material mixing caused by a single feed port in a traditional reactor, including a total feed channel, a first-level shunt channel, a first-level feed channel, a second-level shunt channel, a second-level feed channel, a third-level shunt channel, a third-level feed channel, and so on, which can be increased to an N-th level shunt channel and an N-th level feed channel as needed. According to different needs, the feed distributor can adopt a symmetrical distribution or an asymmetrical distribution with different geometric structures. The top head of the reactor body has two material inlets, the main material inlet introduces the material into the feed distributor, and the auxiliary material inlet introduces the material directly into the reactor, and the bottom of the reactor body is provided with a discharge port and a base. The stirring device is located inside the reactor body and is composed of a stirring shaft and a stirring paddle. The stirring paddle is located at the bottom of the stirring shaft, the stirring shaft is located at the axis of the reactor body, the top of the stirring shaft passes through the reactor body and is connected to an external motor. There is no contact between the stirring device and the feed distributor.

[0007] The total feed channel is composed of a pipeline, which runs from the top of the reactor body to the inside of the reactor body, deviating from the axis of the reactor body. The first-level shunt channel is below the total feed channel, and the feed channels of each level are below the corresponding shunt channels of the same level and above the shunt channels of the next level. For example, the first-level feed channel is below the first-level shunt channel and above the second-level shunt channel. Each level of shunt channel contains a plurality of identical shunt pipe clusters, which are dispersed around the same cross section and are rotationally symmetrical about the axis of the reactor body. Each shunt pipe cluster can be composed of a single pipe or a plurality of pipes, and the end of each pipe is a shunt outlet, and each shunt inlet corresponds to a plurality of shunt outlets. The plurality of shunt outlets are rotationally symmetrical about their shunt inlets. Each level of feed channel contains a plurality of identical pipes, and each pipe inlet is connected to the shunt outlet of the corresponding shunt channel of the same level, and each pipe outlet is connected to the shunt inlet of the shunt channel of the next level.

[0008] When in use, material A is first in the kettle, and material B is added later for mixing and reaction. First, all material A is added to the kettle through the auxiliary material inlet, and then material B enters the total feed channel through the main material inlet, and enters the diversion channels of each level from the diversion inlet. At the outlet of each diversion channel, it is divided into multiple strands of material that are symmetrical about the axis of the reactor body, flows downward along each level of the feed channel, and finally flows out from multiple feed ports, and is mixed and reacted under the action of the stirring device. When entering each level of the diversion channel, since each pipe constituting the diversion channel has the same size structure, the diversion outlets of each diversion pipe cluster are symmetrical about the diversion inlet, and material B is divided into the same flow rate, achieving symmetrical distribution in the horizontal direction. After the reaction is completed, the product is collected through the discharge port at the bottom of the reactor body. A base is provided at the bottom of the reactor body to support the entire device.

[0009] Furthermore, the number of diversion stages N can be changed according to actual needs. When the number of diversion stages increases, the number of final feed ports increases, but under a fixed pipe diameter, the number of diversion stages is affected by the reactor body diameter and has an upper limit. The upper limit of the number of diversion stages can be changed by adjusting the pipe diameter. When the number of diversion stages is sufficient, "spray-like" feeding can be achieved in the end.

[0010] Furthermore, the number of pipes contained in the diversion channels and feed channels at different levels may be the same or different. The change in the number of pipes at different levels can change the final feed port distribution shape. As the number of pipes contained in each level of diversion channels increases, the number of pipes in the corresponding feed channels at the same level will also increase accordingly.

[0011] Furthermore, the clusters of the diversion pipes constituting the diversion channels at each level can rotate around the diversion inlet, and distributions of different shapes can be achieved through different rotation angles.

[0012] Furthermore, the length of each pipeline constituting the diversion channel can be adjusted, and the distribution of the final feed inlets will be different under different pipeline lengths.

[0013] Furthermore, the shapes of the pipes of each branch channel and feed channel may be different according to actual needs, and may be circular, square, etc.

[0014] Furthermore, the pipeline length of the total feed channel can be adjusted according to actual needs. According to actual needs, the height of the distributor outlet feed position can be changed by adjusting the pipeline length.

[0015] Furthermore, each of the first-stage feed channel, the second-stage feed channel, the third-stage feed channel, ..., the N-stage feed channel has a valve at the top of the pipe. By controlling the opening and closing of the valve, the number of feed ports and the feed position can be changed. The distribution uniformity can be changed according to actual needs, including symmetrical distribution and asymmetrical distribution, to control the mixing effect and thus regulate the product quality.

[0016] Furthermore, the total feed channel deviates from the axis of the reactor body to avoid position conflict with the stirring shaft. The feed distributor is located inside, and no additional holes are required in the top head of the reactor body. The feed distributor can also be set above the reactor body according to actual needs, and the total feed channel can be set at the axis of the reactor body, and the hole in the head can be used as the outlet of the Nth level feed channel.

[0017] Furthermore, the outlet of the last-stage feed channel can be equipped with a sieve plate as needed to further improve the distribution effect.

[0018] The beneficial effects of the present invention are:

[0019] (1) The stirred reactor with a feed distributor described in the present invention is composed of a reactor body and a feed distributor. When in use, the material at the total feed inlet is divided into multiple streams of material with the same flow rate through N-stage diversion channels. The multiple streams of material are symmetrically distributed in the horizontal direction, thereby avoiding the aggregation of materials caused by a single feed inlet concentrating on a certain area, providing good initial conditions for uniform mixing of materials in the reactor, effectively solving the problem of uneven material mixing caused by a single feed inlet of a traditional reactor, and being conducive to improving the quality of the final product.

[0020] (2) Compared with the traditional method of changing the shape of the stirring paddle, the installation position of the stirring paddle, the stirring speed, etc. to enhance the mixing effect, the present invention is easier to adjust by adding a feed distributor, and does not increase the stirring power. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the 45° rotationally symmetrical feed distributor of the present invention;

[0023] Figure 3 This is a schematic diagram of the feed port position distribution of the 45° rotationally symmetrical feed distributor of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the 90° rotationally symmetrical feed distributor of the present invention;

[0025] Figure 5 Schematic diagram of the feed port position distribution of the 90° rotationally symmetrical feed distributor of the present invention;

[0026] Figure 6 It is a graph showing the mixing index changing with the number of feed ports.

[0027] In the figure: 1 main material inlet; 2 total feed channel; 3 first-level diversion channel; 4 first-level feed channel; 5 second-level diversion channel; 6 second-level feed channel; 7 third-level diversion channel; 8 third-level feed channel; 9 fourth-level diversion channel; 10 fourth-level feed channel; 11 fifth-level diversion channel; 12 fifth-level feed channel; 13 feed channel valve; 14 reactor body; 15 stirring shaft; 16 feed port; 17 auxiliary material inlet; 18 discharge port; 19 base. DETAILED DESCRIPTION

[0028] In order to enhance the recognition and understanding of the present invention, the technical solution of the present invention is clearly and completely described below through the accompanying drawings and specific implementation methods. Obviously, the examples described are only part of the examples of the present invention, which are intended to explain the present invention, not all examples, and cannot be understood as limiting the present invention. On the basis of the embodiments of the present invention, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the present invention.

[0029] Example 1: See Figure 1 , Figure 2 and Figure 3 A stirred reactor with a feed distributor comprises a reactor body 14, a stirring device and a feed distributor, wherein the feed distributor adopts a 45° rotationally symmetrical distribution mode. The reactor body 14 is 2.05m high and 1.3m in diameter, and the upper and lower ends use the same standard elliptical heads, and the materials include carbon manganese steel, stainless steel, zirconium, and nickel-based alloys. The feed distributor is located inside the reactor body 14, and the stirring shaft 15 is located at the center of the reactor body 14. A discharge port 18 and a base 19 are provided at the bottom of the reactor body 14.

[0030] The uppermost end of the feed distributor is the total feed channel 2, which is a vertical cylindrical pipe located at the original feed inlet of the reaction kettle body 14. The end of the total feed channel 2 extends in two directions on the horizontal plane, and then deflects 90° and continues to extend to form a "匚"-shaped cylindrical pipe, constituting the first-stage shunt channel 3, which is symmetric about the total feed channel 2, and its two open ends are on the diameter of the reaction kettle body 14. Then, the two ends extend downward respectively to form the first-stage feed channels 4. Next, the lower ends of the two pipes of the first-stage feed channels 4 extend forward and backward in the direction perpendicular to the diameter of the reaction kettle body 14 to form two cylindrical pipes, which are parallel to each other and symmetric about the total feed channel 2, constituting the second-stage shunt channel 5. The two ends of each pipe of the second-stage shunt channel 5 extend downward respectively to form 4 cylindrical pipes, constituting the second-stage feed channels 6. Next, the lower ends of each pipe of the second-stage feed channels 6 extend forward and backward in the direction perpendicular to the diameter of the reaction kettle body 14 to form 4 cylindrical pipes, which are centrosymmetric about the stirring shaft 15, constituting the third-stage shunt channel 7. The two ends of each pipe of the third-stage shunt channel 7 extend downward respectively to form 8 vertical cylindrical pipes, constituting the third-stage feed channels 8. Next, each pipe of the third-stage feed channels 8 extends forward and backward along the diameter direction of the reaction kettle body 14 to form 8 horizontal cylindrical pipes, constituting the fourth-stage shunt channel 9. The two ends of each pipe of the fourth-stage shunt channel 9 extend downward respectively to form 16 vertical cylindrical pipes, constituting the fourth-stage feed channels 10. Next, the lower ends of each pipe of the fourth-stage feed channels 10 extend forward and backward along the diameter direction of the reaction kettle body 14 to form 16 horizontal cylindrical pipes, constituting the fifth-stage shunt channel 11. Then, the two ends of each pipe of the fifth-stage shunt channel 11 extend downward respectively to form 32 vertical cylindrical pipes, constituting the fifth-stage feed channels 12, and the included angle α between adjacent two pipes is 45°. The pipe length of the total feed channel 2 is adjustable. Each pipe of each stage of feed channels is provided with a feed channel valve 13 at the top.

[0031] The dimensions of the feed distributor are as follows: The total feed channel 2 runs through the reactor body 14, and the distance from the stirring shaft 15 is 325 mm. The distance between the upper end of the channel and the top of the reactor body 14 is 100 mm. The pipe diameter of the total feed channel 2 is 50 mm, and the length of the channel is 200 mm. The diameters of the three pipes of the "C"-shaped pipe of the first-stage shunt channel 3 are 50 mm, and the lengths are 475 mm, 375 mm, and 375 mm respectively. The diameter of the first-stage feed channel 4 is 50 mm, and the lengths of the two pipes are both 50 mm. The diameters of the two pipes of the second-stage shunt channel 5 are 50 mm, and the length is 476 mm. The diameters of the 4 cylindrical pipes of the second-stage feed channel 6 are all 50 mm, and the lengths are all 50 mm. The diameters of the 4 pipes of the third-stage shunt channel 7 are 50 mm, and the length is 299 mm. The diameters of the 8 cylindrical pipes of the third-stage feed channel 8 are all 50 mm, and the lengths are all 50 mm. The diameters of the 8 cylindrical pipes of the fourth-stage shunt channel 9 are all 50 mm, and the length is 310 mm. The diameters of the 16 cylindrical pipes of the fourth-stage feed channel 10 are 50 mm, and the length is 50 mm. The diameters of the 16 cylindrical pipes of the fifth-stage shunt channel 11 are 50 mm, and the lengths are all 180 mm. The diameters and lengths of the 32 cylindrical pipes of the fifth-stage feed channel 12 are both 50 mm.

[0032] In this embodiment, the reactor is used for the synthesis production of meta-aramid. First, dissolve m-phenylenediamine in N,N-dimethylacetamide, and add it into the reactor body 14 through the auxiliary material inlet 17, occupying 3 / 4 of its height, which is 1537.5 mm. The lower end of the fifth-stage feed channel 12 is above the liquid level, and the height from the liquid level is 162.5 mm. Then, add isophthaloyl chloride with the same amount of substance as m-phenylenediamine into the main material inlet 1. The isophthaloyl chloride material passes through the total feed channel 2 and is divided into 2 streams of the same flow rate by the first-stage shunt channel 3 and flows into the first-stage feed channel 4. Then, it enters the second-stage shunt channel 5 respectively and is divided into 4 streams of the same flow rate again. Then, it enters the third-stage shunt channel 7 and is divided into 8 streams of the same flow rate, divided into 16 streams by the fourth-stage shunt channel 9, and divided into 32 streams by the fifth-stage shunt channel 11. The 32 feed ports 16 are rotationally symmetrically distributed with a rotation angle α of 45° in the horizontal direction. By controlling the switch valve 13, the number of feed ports and the feed positions can be changed. For example, only open 8 of the outermost circle of valves of the fifth-stage feed channel 12, and finally there are only 8 feed ports close to the outer wall surface of the reactor body 14; only open 8 of the innermost circle, and finally there are only 8 feed ports close to the axis of the reactor body 14. By changing the pipe length of the total feed channel 2, the height between the feed position and the liquid level can be adjusted.

[0033] Example 2: Refer to Figure 1 、 Figure 4 and Figure 5 , which adopts a 90° rotationally symmetric distribution method.

[0034] The pipeline arrangements of the total feed channel 2, the first-stage shunt channel 3, the first-stage feed channel 4, the second-stage shunt channel 5, and the second-stage feed channel 6 of the feed distributor are the same as those in Example 1. The lower end of each pipeline of the second-stage feed channel 6 extends in four directions of front, back, left, and right to form 4 horizontal cross-shaped pipelines, constituting the third-stage shunt channel 7, and each pipeline is perpendicular or parallel to the pipeline of the second-stage shunt channel 5. The four corners of each cross-shaped pipeline of the third-stage shunt channel 7 extend downward to form 16 cylindrical pipelines, constituting the third-stage feed channel 8. The end of each pipeline of the third-stage feed channel 8 extends in both side directions to form 16 horizontal cylindrical pipelines, constituting the fourth-stage shunt channel 9. The end of each pipeline of the fourth-stage shunt channel 9 extends downward respectively to form 32 cylindrical pipelines, constituting the fourth-stage feed channel 10.

[0035] The dimensions of the feed distributor are as follows: The total feed channel 2 runs through the reactor body 14, and the distance from the stirring shaft 15 is 325 mm. The distance between the upper end of the channel and the top of the reactor body 14 is 100 mm. The pipeline diameter of the total feed channel 2 is 50 mm, and the length of the channel is 200 mm. The diameters of the three pipelines of the "C"-shaped pipeline of the first shunt channel 3 are 50 mm, and the lengths are 570 mm, 310 mm, and 310 mm respectively. The diameter of the first-stage feed channel 4 is 50 mm, and the lengths of the two pipelines are both 50 mm. The diameters of the two pipelines of the second-stage shunt channel 5 are 50 mm, and the length is 570 mm. The diameters of the 4 cylindrical pipelines of the second-stage feed channel 6 are 50 mm, and the length is 50 mm. The diameters of the cylindrical pipelines of the third-stage shunt channel 7 are all 50 mm, and the length is 310 mm. The diameters of the 16 cylindrical pipelines of the third-stage feed channel 8 are all 50 mm, and the lengths are all 50 mm. The diameters of the 16 cylindrical pipelines of the fourth-stage shunt channel 9 are all 50 mm, and the lengths are all 180 mm. The diameters of the 32 cylindrical pipelines of the fourth-stage feed channel 10 are all 50 mm, and the lengths are all 50 mm.

[0036] In this embodiment, the isophthaloyl chloride material enters the total feed channel 2 and is divided into 2 streams of materials with the same flow rate by the first-stage shunt channel 3 and flows into the first feed channel 4. Then, 4 streams of materials are formed in the second-stage shunt channel 5 and enter the second-stage feed channel 6, and 16 streams are formed in the third-stage shunt channel 7 and enter the third-stage feed channel 8. Finally, it is divided into 32 streams of materials at the fourth-stage shunt channel 9 and enters the fourth-stage feed channel 10, flowing into the reactor. The 32 streams of materials show a rotational symmetry distribution with a rotational angle α of 90° in the horizontal direction.

[0037] Example 3: Referring to Example 1, by adjusting the length of the diversion pipeline and closing the feed channel valve 13, only the feed port at the 1 / 2 radius of the stirring tank body 14 is retained. The total feed flow rate of isophthaloyl chloride is set to 792.5 L / h. After stirring and mixing for the same time, the mixing effects of the feed ports 1, 2, 4, 6, and 8 are compared respectively. The evaluation standard is the mixing index Mi, which is calculated as follows:

[0038]

[0039] The reactor is divided into multiple spatial points, where N is the total number of spatial points, V i is the volume of the i-th spatial point, V is the total volume of all spatial points, C i is the mass fraction of isophthaloyl chloride at the i-th spatial point, C a is the expected value of the mass fraction of isophthaloyl chloride, C i,0 is the initial mass fraction of isophthaloyl chloride at the ith spatial point. The mixing index Mi is between 0 and 1, and the closer it is to 1, the better the mixing.

[0040] Figure 6 In the figure, as the number of feed ports increases, the mixing index Mi gradually increases and the mixing efficiency is improved.

[0041] In the description of the present invention, it is necessary to understand that terms such as “center”, “up”, “down”, “horizontal”, “vertical”, “left”, “right”, “top”, “bottom”, “inside” and “length” indicating directions or positional relationships are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0042] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or concealing the number of technical features indicated. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, unless otherwise clearly specified.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A stirred reactor with a feed distributor, characterized in that: The stirred reactor comprises a feed distributor, a reactor body (14) and a stirring device; the feed distributor has a multi-level fractal structure, comprising a total feed channel (2), a first-level branch channel (3), a first-level feed channel (4), a second-level branch channel (5), a second-level feed channel (6), a third-level branch channel (7), a third-level feed channel (8), and so on, and is increased to an N-th branch channel and an N-th feed channel as required, and is located inside the reactor body (14); two material inlets are provided at the top of the reactor body (14), the main material inlet (1) is used to introduce the material into the feed distributor, and the auxiliary material inlet (17) is used to directly introduce the material into the reactor, and the bottom of the reactor body (14) is provided with a discharge port (18) and a base (19); the stirring device is located inside the reactor body (14).

2. A stirred reactor with a feed distributor according to claim 1, characterized in that: The total feed channel (2) is composed of a pipe, which runs from the top of the reactor body (14) to the inside of the reactor body (14), deviating from the axis of the reactor body (14), the top of the total feed channel (2) is connected to the main material inlet (1), and the bottom is connected to the first-stage diversion channel (3); the first-stage diversion channel (3) is below the total feed channel (2) and above the first-stage feed channel (4), that is, each stage of the feed channel is below the corresponding diversion channel of the same stage and above the diversion channel of the next stage, such as the first-stage feed channel (4) is below the first-stage diversion channel (3) and above the second-stage diversion channel (5).

3. A stirred reactor with a feed distributor according to claim 1, characterized in that: In the feed distributor: Each level of the diversion channel comprises a plurality of identical diversion pipe clusters, which are dispersed on the same cross section, and the entire feed distributor is rotationally symmetrical about the axis of the reactor body (14); each diversion pipe cluster can be composed of a single pipe or a plurality of pipes, and the end of each pipe is a diversion outlet, and the bottom of each diversion outlet is connected to the diversion inlet of the same level of the feed channel, and each diversion inlet corresponds to a plurality of diversion outlets of the next level of the diversion channel; the plurality of diversion outlets are rotationally symmetrical about the diversion inlet of the previous level of the feed channel; Each level of feed channel includes a plurality of identical pipes, and the inlet of each pipe is connected to the diversion outlet of the corresponding diversion channel of the same level, and at the same time, each pipe outlet is connected to the diversion inlet of the diversion channel of the next level.

4. A stirred reactor with a feed distributor according to claim 3, characterized in that: The clusters of diversion pipes constituting each level of diversion channels can rotate around the diversion inlet, and different shapes of distribution can be achieved through different rotation angles; the lengths of each pipe constituting the diversion channel can be adjusted, and the final distribution of the feed port is different under different pipe lengths; and the pipe shapes of each diversion channel and feed channel can be different according to actual needs.

5. A stirred reactor with a feed distributor according to claim 1, characterized in that: The number of pipes contained in the diversion channels and feed channels at different levels can be the same or different. The change in the number of pipes at different levels can change the final feed port distribution shape. As the number of pipes contained in each level of diversion channels increases, the number of pipes in the corresponding feed channels at the same level will also increase accordingly.

6. A stirred reactor with a feed distributor according to claim 1, characterized in that: The length of the pipeline of the total feed channel (2) is adjusted according to actual needs, thereby changing the height of the feed position at the distributor outlet.

7. A stirred reactor with a feed distributor according to claim 1, characterized in that: The outlet of the last-stage feed channel of the feed distributor is provided with a sieve plate as required; The stirring device is composed of a stirring shaft and a stirring paddle, wherein the stirring paddle is located at the bottom of the stirring shaft, the stirring shaft is located at the axis of the reactor body (14), the top of the stirring shaft passes through the reactor body (14) and is connected to an external motor, and the stirring device is not in contact with the feed distributor.

8. A stirred reactor with a feed distributor according to claim 1, characterized in that: Each pipe top of the N-stage feed channel in the feed distributor is provided with a valve, and the number of feed ports and feed positions can be changed by controlling the opening and closing of the valve, and the distribution uniformity can be changed according to actual needs, including symmetrical distribution and asymmetrical distribution.

9. A stirred reactor with a feed distributor according to claim 1, characterized in that: According to actual needs, the number of diversion stages N can be changed; when the number of diversion stages increases, the number of final feed ports increases accordingly; under a fixed pipeline diameter, the maximum number of diversion stages is affected by the diameter of the reactor body (14), and the maximum number of diversion stages can be changed by adjusting the pipeline diameter; when the number of diversion stages is sufficient, "spray-like" feeding can be achieved.

10. A method for using a stirred reactor with a feed distributor according to any one of claims 1 to 9, characterized in that: When in use, material A is first in the kettle, and material B is added from outside the kettle to mix and react; specifically: First, all the material A is added into the kettle through the auxiliary material inlet (17), and then the material B enters the main feed channel (2) through the main material inlet (1), is divided into multiple streams by the various levels of branch channels, and finally flows out from multiple feed ports, and is mixed and reacted under the action of the stirring device; after the reaction is completed, the product is collected through the discharge port (18) at the bottom of the reaction kettle body (14); the reaction kettle body (14) is supported on the ground by a base (19); When entering each level of the diversion channel, since each pipe constituting the diversion channel has the same size and structure, the diversion outlets of each diversion pipe cluster are symmetrical about the diversion inlet, and material B is divided into the same flow rate to achieve symmetrical distribution in the horizontal direction.

Images