WO2024037666A1

WO2024037666A1 - Reactor, reaction device, and reaction method

Info

Publication number: WO2024037666A1
Application number: PCT/CN2023/124670
Authority: WO
Inventors: 张湖曦; 王玉枫; 李艳明
Original assignee: 中国石油化工股份有限公司; 中石化上海工程有限公司
Priority date: 2022-08-16
Filing date: 2023-10-16
Publication date: 2024-02-22

Abstract

A reactor, a reaction device, and a reaction method. The reactor comprises a reactor housing (1), first and second collection plates, and a circulating coil component (4); a cylindrical inner cavity is formed in the reactor housing (1); the first and second collection plates are provided on both radial sides of the inner cavity to partition the inner cavity into a first collection channel (11), a reaction chamber (12), and a second collection channel (13) arranged in sequence along the radial direction; the circulating coil component (4) is provided in the reaction chamber (12) and is provided with a medium inlet and a medium outlet; the reactor housing (1) is provided with a medium inlet communicated with the first collection channel (11) and a medium outlet communicated with the second collection channel (13); the first collection plate (2) is provided with a first communication port (21) enabling the first collection channel (11) to be communicated with the medium inlet of the circulating coil component (4); and the second collection plate (3) is provided with a second communication port (31) enabling the second collection channel (13) to be communicated with the medium outlet of the circulating coil component (4). The reactor can achieve uniform control of the temperature of the reactor without being limited by the diameter of the reactor.

Description

Reactor, reaction device and reaction method

Technical field

The invention relates to the field of chemical industry, and specifically to a reactor, a reaction device and a reaction method.

Background technique

The polymerization reactor is a key equipment in the continuous polymerization process. It is a plug flow reactor. It controls the reaction temperature by removing heat through an internal heat exchange coil to ensure precise process control and produce uniform and high-quality polymer products.

As shown in Figures 1 and 2, a conventional polymerization reactor mainly includes a shell 7, a knotted coil group 9 and a collection loop 8. The knotted coil group 9 is composed of multiple heat exchange coils. Each heat exchange coil is wound into a sheet shape, multiple heat exchange coils are stacked together in parallel, and the collective ring pipe 8 is sandwiched between the upper and lower flanges 71 of the shell. The polymer solution flows into the shell 7 from the polymer solution inlet located at the top of the shell, and flows out of the shell 7 from the polymer solution outlet located at the bottom of the shell. The heat exchange medium enters the collecting loop 8 from the tube inlet 81, and passes through the collecting loop. 8 is distributed to each heat exchange coil for circulation, and then enters the collecting loop pipe 8 and flows out from the tube outlet 82. This medium circulation method is used to adjust the precise control of the polymerization reaction temperature to achieve different conversion rates and obtain different grades of polymer products.

However, the above-mentioned polymerization reactor has the following problems: each heat exchange coil is welded to the collective ring in a parallel manner, and the total length of the heat exchange coil near the center of the reactor is different from that of the heat exchange coil located at the edge, resulting in Different resistance differences lead to uneven medium flow in the coil and inaccurate temperature control. Moreover, with the expansion of the scale of the polymerization process, the diameter of the polymerization reactor is also increasing, the greater the difference in the total length of each sheet coil, the greater the flow non-uniformity, the temperature control effect becomes worse, and the reaction conversion rate decreases; at the same time, A large arcuate area will be formed on the two opposite sides of the cylindrical reactor wall. Since coils cannot be arranged in the arcuate area, heat removal cannot be achieved in this area, resulting in uneven temperature control in the reactor and adversely affecting product quality. affect.

Contents of the invention

The object of the present invention is to solve at least one of the problems existing in the above-mentioned conventional polymerization reactors.

In order to achieve the above object, a first aspect of the present invention provides a reactor, including:

a reactor shell defining a cylindrical inner cavity;

A first collection plate and a second collection plate. The first collection plate and the second collection plate are arranged on both radial sides of the inner cavity to separate the inner cavity into sequentially arranged ones along the radial direction. The first collection channel, the reaction chamber, and the second collection channel; and

a circulation coil assembly, the circulation coil assembly is arranged in the reaction chamber, the circulation coil assembly has a medium inlet and a medium outlet,

Wherein, the reactor shell is provided with a medium inlet connected to the first collection channel and a medium outlet connected to the second collection channel, and the first collection plate is provided with a medium inlet connected to the first collection channel. The first communication port between the channel and the medium inlet of the circulation coil assembly, and the second collection plate is provided with a second communication port that connects the second collection channel and the medium outlet of the circulation coil assembly.

In some embodiments, the first collection plate and the second collection plate are respectively formed as arcuate plates extending along the axial direction of the inner cavity, and both are relative to the plane of the central axis of the inner cavity. Symmetrical setup.

In some embodiments, the medium inlet of the reactor housing is provided corresponding to the upper part of the first collection channel, and the medium outlet of the reactor housing is provided corresponding to the upper part of the second collection channel, and the The first communication port is provided corresponding to the lower part of the first collection channel, and the second communication port is provided corresponding to the lower part of the second collection channel.

In some embodiments, the circulating coil assembly includes a plurality of circulating coil groups connected in parallel, each of the circulating coil groups has a medium inlet and a medium outlet, and the first collection plate is provided with a plurality of A plurality of first communication ports corresponding one-to-one to the plurality of medium inlets of the circulation coil group, and the second collection plate is provided with a plurality of first communication ports corresponding one-to-one to the plurality of medium outlets of the circulation coil group. a second connecting port.

In some embodiments, the media strokes between the plurality of circulating coil groups are approximately equal.

In some embodiments, the circulation coil assembly includes a plurality of circulation coils, and the plurality of circulation coils are arranged at intervals along the radial direction of the inner cavity; the reaction chamber is formed by a center of the inner cavity. The plane of the axis is divided into a first area close to the first collection plate and a second area close to the second collection plate. The number of circulation coils located in the first area is related to the number of circulation coils located in the second area. The number of coils is consistent;

Wherein, the medium inlet of the circulation coil located in the first area is connected to the first communication port through the inlet bottom winding, and the medium outlet of the circulation coil located in the second area is connected to the outlet bottom winding. The second communication port is connected; along the direction from the first area to the second area, the circulation coil located in the first area and the circulation coil located in the second area are connected in sequence through the top winding pipe. ;

Wherein, the two corresponding circulation coils located in the first area and the second area and the corresponding inlet bottom coil, outlet bottom coil and top coil together form the circulation coil group.

In some embodiments, the circulation coil is generally in the shape of a square sheet, and both axial sides of each circulation coil are respectively disposed close to the inner wall of the reactor shell.

In some embodiments, the circulation coil is parallel to the first collection plate and the second collection plate, and a plurality of the circulation coils are evenly spaced along the radial direction of the inner cavity to collect all the circulation coils. Divide the reaction chamber into equal parts.

In some embodiments, the circulating coil assembly has at least one of the following arrangements:

Method 1: A plurality of the inlet bottoms are arranged in groups around the pipe at different heights on the horizontal plane.

Method 2: A plurality of outlet bottoms are arranged in groups around the pipe at different heights on the horizontal plane.

Method 3: A plurality of the top winding pipes are arranged in groups on horizontal planes of different heights.

In some embodiments, a plurality of the inlet bottom coils are arranged in two groups at two horizontal planes with different heights, and the corresponding inlet bottom coils of adjacent circulation coils are located at different water levels. Plane, the pipe around the bottom of the inlet is an L-shaped bent pipe;

A plurality of the outlet bottom coils are divided into two groups and are arranged on two horizontal planes with different heights. The corresponding outlet bottom coils of adjacent circulation coils are located on different horizontal planes. The outlet bottom coils are L-shaped. Bend pipe;

A plurality of the top winding pipes are divided into two groups and arranged on two horizontal planes with different heights, and the corresponding top winding pipes of adjacent circulating coils are located on different horizontal planes, and the top winding pipes are straight pipes;

The plurality of first communication openings are arranged in two groups on two horizontal planes with different heights, and the plurality of second communication openings are arranged in two groups on two horizontal planes with different heights.

In some embodiments, the circulation coil is a serpentine tube, and the bending directions of two adjacent circulation coils are perpendicular to each other.

In some embodiments, the circulation coil is a corrugated tube, and the waves of two adjacent circulation coils are arranged staggered with each other.

In some embodiments, the bending angle α of the waves of the circulating coil ranges from 30° to 150°.

In some embodiments, the reactor shell is provided with a reaction raw material inlet and a reaction product outlet that are connected to the reaction chamber, and the circulation coil assembly is provided between the reaction raw material inlet and the reaction product outlet. between.

A second aspect of the present invention provides a reaction device, including a medium circulation system and the above-mentioned reactor. The medium circulation system includes a medium output pipeline and a medium recovery pipeline. The medium output pipeline is connected with the reactor. The medium inlet of the shell is connected, and the medium recovery pipeline is connected with the medium outlet of the reactor shell.

A third aspect of the present invention provides a reaction method, which reaction method includes reacting the reaction raw materials in the above-described reaction device, and at least part of the reaction time is performed in the presence of a cooling medium.

In some embodiments, the reaction is a polymerization reaction.

In some embodiments, the monomer employed in the polymerization reaction contains styrene.

The above technical solution of the present invention is formed by forming arcuate areas on both sides of the inner cavity of the reactor shell. The collective channel for the circulation of heat exchange medium can not only remove heat from the arcuate area and avoid the local temperature increase caused by the inability of heat transfer when the polymer flows into the arcuate area, but also can save the installation of the collective loop in conventional polymerization reactors. , to achieve the simplification of the reactor structure and the maximization of the inner cavity volume. Compared with conventional polymerization reactors, the reactor of the present invention has uniform reactor temperature, good temperature control effect, high reaction conversion rate, and is not limited by the diameter of the reactor.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a partial structural schematic diagram of a conventional polymerization reactor;

Figure 2 is a cross-sectional view of the polymerization reactor A-A in Figure 1;

Figure 3 is a partial structural schematic diagram of the reactor of the present invention;

Figure 4 is a B-B cross-sectional view of the reactor in Figure 3;

Figure 5 is a C-C cross-sectional view of the reactor in Figure 3;

Figure 6 is a D-D cross-sectional view of the reactor in Figure 3;

Figure 7 is an E-E cross-sectional view of the reactor in Figure 3;

Figure 8 is an F-F cross-sectional view of the reactor in Figure 3;

Figure 9 is a G-G cross-sectional view of the reactor in Figure 3;

Figure 10 is a H-H cross-sectional view of the reactor in Figure 3;

Figure 11 is a schematic structural diagram of an embodiment of the circulating coil group in the present invention;

Figure 12 is a schematic structural diagram of another embodiment of the circulating coil group in the present invention;

Figure 13 is a partial schematic diagram of the circulation coil in Figure 12.

Explanation of reference signs
1-reactor shell, 11-first collection channel, 12-reaction chamber, 13-second collection channel, 2-
The first collection plate, 21-the first communication port, 3-the second collection plate, 31-the second communication port, 4-circulation coil assembly, 41-circulation coil, 42-inlet bottom winding, 43-outlet bottom Pipe wrapping, 44-top pipe wrapping, 5-inlet pipe, 6-outlet pipe;
7-shell, 71-flange, 8-collecting ring pipe, 81-pipe inlet, 82-pipe outlet, 9-knot coil group.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the invention by way of example, but cannot be used to limit the scope of the invention. The invention can be implemented in many different forms and is not limited to the specific embodiments disclosed in the text. Rather, it includes all technical solutions falling within the scope of the claims.

These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangements of parts and steps, compositions of materials, numerical expressions, and numerical values set forth in these embodiments are to be construed as illustrative only and not as limitations.

It should be noted that in the description of the present invention, unless otherwise stated, the meaning of "plurality" is greater than or equal to two; the terms "upper", "lower", "left", "right" and "inner" The orientation or positional relationship indicated by "outside" or "outside" is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood. are limitations of the present invention. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

In addition, "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not vertical in the strict sense, but within the allowable error range. "Parallel" is not parallel in the strict sense, but within the allowable error range. Similar words such as "include" or "include" mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of also covering other elements.

It should also be noted that in the description of the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood based on specific circumstances. When a specific component is described as being between a first component and a second component, there may or may not be an intervening component between the specific component and the first component or the second component.

All terms used in the present invention have the same meanings as understood by one of ordinary skill in the art to which this invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be construed to have meanings consistent with their meanings in the context of the relevant technology and should not be interpreted in an idealized or highly formalized sense, except as expressly stated herein. Define it this way.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered a part of the specification.

A first aspect of the present invention provides a reactor, including a reactor shell 1, a first collecting plate 2, a second collecting plate 3 and a circulation coil assembly 4. Among them, the reactor shell 1 defines a cylindrical inner cavity; the first collecting plate 2 and the second collecting plate 3 are arranged on both radial sides of the inner cavity to separate the inner cavity into radially arranged sequentially. The first collection channel 11, the reaction chamber 12, and the second collection channel 13; the circulation coil assembly 4 is arranged in the reaction chamber 12, and the circulation coil assembly 4 has a medium inlet and a medium outlet. Among them, the reactor shell 1 is provided with a medium inlet connected to the first collection channel 11 and a medium outlet connected to the second collection channel 13. The first collection plate 2 is provided with a medium inlet connected to the first collection channel 11 and the circulation coil. There is a first communication port 21 for the medium inlet of the assembly 4, and a second communication port 31 for connecting the second collection channel 13 and the medium outlet of the circulation coil assembly 4 is provided on the second collecting plate 3.

From the above, it can be understood that the edge of the first collecting plate 2 is connected to the inner wall of the reactor shell 1 , and the first collecting channel 11 is defined by the first collecting plate 2 and the inner wall of the reactor shell 1 . The edge of the second collecting plate 3 is connected to the inner wall of the reactor shell 1 , and the second collecting channel 13 is defined by the second collecting plate 3 and the inner wall of the reactor shell 1 . The first collection board 2 and the second collection board 3 The area in between forms the reaction chamber 12 .

When in use, the heat exchange medium enters the first collection channel 11 through the medium inlet on the reactor shell 1 and is distributed to the circulation coil assembly 4 through the first communication port 21. After circulating in the circulation coil assembly 4, it passes through the second The communication port 31 enters the second collection channel 13 and is finally discharged through the medium outlet on the reactor shell 1 .

The above technical solution of the present invention forms the arcuate areas on both sides of the inner cavity of the reactor shell 1 to form a collective channel for the circulation of heat exchange medium, which not only can realize the heat removal of the arcuate area, but also prevents the polymer from flowing into the arcuate area and being unable to transfer heat. The resulting local temperature increase can eliminate the need for the collecting loop 8 in conventional polymerization reactors, thereby simplifying the reactor structure and maximizing the inner cavity volume. Compared with conventional polymerization reactors, the reactor of the present invention has uniform reactor temperature, good temperature control effect, high reaction conversion rate, and is not limited by the diameter of the reactor.

In the present invention, the first collecting plate 2 and the second collecting plate 3 can have any appropriate structure and arrangement as long as their separation function can be realized. In some embodiments, as shown in Figures 3 and 4, the first collection plate 2 and the second collection plate 3 are respectively formed as arcuate plates extending along the axial direction of the inner cavity of the reactor shell 1, and both They are arranged symmetrically with respect to the plane of the central axis of the inner cavity (see plane P shown in FIG. 4 ), which also means that the first collective channel 11 and the second collective channel 13 are symmetrically arranged. The axial height of the first collection channel 11 and the second collection channel 13 is greater than the axial height of the circulation coil assembly 4 .

It can be understood that the arrangement of the first collecting plate 2 and the second collecting plate 3 can be adjusted according to the diameter of the reactor shell 1 to define the arcuate area in the inner cavity of the reactor shell where the circulation coil cannot be arranged as the collecting channel. .

In some embodiments, as shown in Figure 1, the medium inlet of the reactor housing 1 is provided corresponding to the upper part of the first collection channel 11, and the medium outlet of the reactor housing 1 is provided corresponding to the upper part of the second collection channel 13, The first communication port 21 is provided corresponding to the lower part of the first collection channel 11 , and the second communication port 31 is provided corresponding to the lower part of the second collection channel 13 . This allows the heat exchange medium to flow effectively in the inner cavity for efficient heat exchange. Of course, in other embodiments, each medium inlet, The media outlet and connecting port can be positioned according to actual application needs. For example, in other embodiments, the second communication port 31 and the medium outlet of the reactor housing 1 may be provided corresponding to the upper part of the second collection channel 13 .

In the present invention, the circulation coil assembly 4 can have any appropriate embodiment, for example, the knotted coil group 9 in a conventional polymerization reactor can be used. However, in order to solve the problem that the heat exchange coil resistance difference in the knotted coil group 9 in the conventional polymerization reactor is different, resulting in uneven medium flow in the coil and inaccurate temperature control, the present invention provides a preferred implementation. way, the circulation coil assembly 4 includes a plurality of circulation coil groups connected in parallel, each circulation coil group has a medium inlet and a medium outlet, and the first collection plate 2 is provided with multiple media and multiple circulation coil groups. There are a plurality of first communication ports 21 corresponding to the inlets one by one. The second collection plate 3 is provided with a plurality of second communication ports 31 corresponding one to one to the plurality of medium outlets of the plurality of circulation coil groups. The plurality of circulation coils Media travel is approximately equal between groups. That is to say, the lengths of the flow channels of the heat exchange medium in the circulating coil group are roughly equal, so that the resistance difference is basically the same, the flow rate of the heat exchange medium is uniform, and the temperature control is accurate.

In order to realize that the medium strokes between multiple circulating coil groups are approximately equal, so as to achieve uniform temperature in the reaction chamber 12, one implementation method given by the present invention is to make the lengths of the medium flow channels of multiple circulating coil groups equal or as far as possible. Reduce the length difference.

Specifically, the circulation coil assembly 4 includes a plurality of circulation coils 41, which are arranged at intervals along the radial direction of the inner cavity; the reaction chamber 12 is divided by the plane of the central axis of the inner cavity (ie, plane P). For the first area close to the first collecting plate 2 and the second area close to the second collecting plate 3, the number of circulation coils 41 located in the first area is consistent with the number of circulation coils 41 located in the second area. Among them, the medium inlet of the circulation coil 41 located in the first area is connected to the first communication port 21 through the inlet bottom coil 42, and the medium outlet of the circulation coil 41 located in the second area is connected to the second communication port through the outlet bottom coil 43. Port 31 is connected. Along the direction from the first area to the second area (see direction A in Figure 4), the circulation coil 41 located in the first area and the circulation coil 41 located in the second area are connected in sequence through the top coil 44 (also That is, the circulating coil in the first area that is closer to the plane P is connected to the circulating coil in the second area that is farther away from the plane P). Among them, located in the first area and the The two corresponding circulation coils 41 in the two areas and the corresponding inlet bottom coil 42, outlet bottom coil 43 and top coil 44 together form a circulation coil group.

As can be seen from Figure 4, since the cross-section of the inner cavity is circular, there is a length difference between the multiple circulation coils 41 arranged along the radial direction of the inner cavity (see the horizontal direction shown in Figure 4). The greater the length of the circulating coil on plane P, the smaller the length of the circulating coil further away from plane P. It should be noted that the length mentioned here is also the length of the flow channel of the heat exchange medium. By connecting the longer circulation coil of the first area close to the plane P with the shorter circulation coil of the second area away from the plane P using the inlet bottom coil 42, the outlet bottom coil 43 and the top coil 44 , and correspondingly adjust the lengths of the inlet bottom coil 42, the outlet bottom coil 43, and the top coil 44, so that the total length of the circulating coil group can be approximately equal.

Among them, in order to make the total length of each circulating coil group approximately equal, the circulating coil assembly 4 can have at least one of the following arrangements:

Method 1: Multiple inlet bottom winding pipes 42 are arranged in groups at different heights on the horizontal plane.

Method 2: Multiple outlet bottom winding pipes 43 are arranged in groups at different heights on the horizontal plane.

Method 3: Multiple top winding pipes 44 are arranged in groups on horizontal planes of different heights.

In some embodiments, the plurality of inlet bottom coils 42 are divided into two groups and are arranged on two horizontal planes with different heights. The corresponding inlet bottom coils 42 of adjacent circulation coils 41 are located on different horizontal planes. The inlet bottom coils 42 are L-shaped elbow. As shown in Figures 5 and 6, adjacent inlet bottom winding pipes 42 are not on the same horizontal plane.

In some embodiments, the plurality of outlet bottom coils 43 are divided into two groups and are arranged on two horizontal planes with different heights. The corresponding outlet bottom coils 43 of adjacent circulation coils 41 are located on different horizontal planes. The outlet bottom coils 43 are L-shaped elbow. As shown in Figures 5 and 6, adjacent outlet bottom winding pipes 43 are not on the same horizontal plane.

In some embodiments, the plurality of top coils 44 are divided into two groups and arranged on two horizontal planes with different heights. The corresponding top coils 44 of adjacent circulation coils 41 are located on different horizontal planes. The top coils 44 are straight pipes. As shown in Figures 7 and 8, adjacent top coils 44 are not on the same horizontal plane.

In some embodiments, the plurality of first communication openings 21 are arranged in two groups on two horizontal planes with different heights, and the plurality of second communication openings 31 are arranged in two groups on two horizontal planes with different heights. The position of the first communication port 21 corresponds to the position of the inlet bottom coil 42 , and the position of the second communication port 31 corresponds to the position of the outlet bottom coil 43 .

Of course, in other embodiments, the circulation coil group may include one or more circulation coils, and top and/or bottom coils for connecting the circulation coils with the first communication port and the second communication port.

In some embodiments, the inlet bottom coil 42 and the outlet bottom coil 43 are perpendicular to the sheet circulation coil 41 .

Specifically, referring to the embodiment shown in FIGS. 3 to 10 , the circulation coil assembly 4 includes eight circulation coil groups, specifically sixteen circulation coils 41 , eight inlet bottom coils 42 , and eight outlet bottom coils. winding tube 43, and eight top winding tubes 44. Each of the first area and the second area has eight circulation coils 41, eight inlet bottom coils 42 are located in the first area, and eight outlet bottom coils 43 are located in the second area. The first collection plate 2 is provided with eight first communication openings 21 , and the second collection plate 3 is provided with eight second communication openings. For ease of explanation, the eight circulating coils 41 in the first area are numbered 1a, 2a, 3a, 4a, 5a, 6a, 7a, 8a respectively from long to short (that is, from left to right as shown in Figure 4). The eight circulating coils 41 in the second area are numbered 1b, 2b, 3b, 4b, 5b, 6b, 7b, and 8b respectively from long to short (that is, from right to left as shown in Figure 4). Figures 5 and 6 show the numbers of the corresponding connected circulation coils of each inlet bottom coil and outlet bottom coil. Figures 7 and 8 show the numbers of the corresponding connected circulating coils of each top coil. It is shown in Figures 9 and 10

The following is a detailed description of the connection method, that is, the flow path of the heat exchange medium, taking one of the circulating coil groups as an example with reference to Figures 3-10. The medium inlet of the reactor shell 1 → the first collection channel 11 → the first communication port 21 marked 1a → the inlet bottom coil 42 marked 1a → the circulation coil 41 marked 1a → the top coil 44 marked 1a → marked The top coil 44 labeled 8b → the circulation coil 41 labeled 8b → the outlet bottom coil 43 labeled 8b → the second communication port 31 labeled 8b → the second collection channel 13 → the medium outlet of the reactor shell 1 . That is to say, the heat exchange medium is passed through the reactor shell 1 The mass inlet enters the first collection channel 11, is distributed to the inlet bottom coil 42 by the first communication port 21, and then enters two series-connected circulation coils. It first circulates in the circulation coil in the first area and reaches the coil. The top of the tube enters the circulation coil in the second area through the top coil 44 and reaches the bottom of the coil. It flows through the corresponding outlet bottom coil 43, enters the second collection channel 13, and passes through the reactor shell 1. Media outlet flows out.

The connection methods of other circulating coil groups can be obtained by referring to the above examples and combining the corresponding numbers in the drawings, and will not be described again here.

In the present invention, the circulation coil 41 may have any appropriate structure. According to a preferred embodiment of the present invention, the circulation coil 41 is generally in the shape of a square sheet. In order to improve the temperature control effect and ensure temperature uniformity, both axial sides of each circulation coil 41 are disposed close to the inner wall of the reactor shell 1 respectively. As shown in Figure 4, the upper and lower sides of each circulation coil 41 are disposed close to the inner wall of the reactor shell 1. At the same time, the upper and lower sides of multiple circulation coils 41 are in contact with the corresponding reactor shell 1. The spacing between the inner walls is consistent.

In addition, in order to improve the temperature control effect and ensure temperature uniformity, the circulation coil 41 is parallel to the first collection plate 2 and the second collection plate 3, and multiple circulation coils 41 are evenly spaced along the radial direction of the inner cavity to ensure Divide the reaction chamber into 12 equal parts. As shown in Figure 4, the circulation coil 41, the first collecting plate 2, and the second collecting plate 3 are all parallel to the plane P.

Figure 11 shows an embodiment of the circulation coil 41. The circulation coil 41 is a serpentine tube, and the bending directions of two adjacent circulation coils 41 are perpendicular to each other.

Figure 12 shows another embodiment of the circulation coil 41. The circulation coil 41 is a corrugated tube, and the waves of two adjacent circulation coils 41 are arranged staggered with each other.

Among them, as shown in FIG. 13 , the bending angle α of the waves of the circulating coil 41 is preferably 30° to 150°.

When in use, the reaction material enters the reaction chamber 12 from the top of the reaction chamber 12, and the material flows downward along the outer wall of the circulation coil, exchanging heat with the heat exchange medium in the circulation coil. When the material flows into the interlaced wave-shaped When circulating the overlapping portion of the coil, the material flows along the overlapping pipe to the outer wall of the adjacent pipe, thereby mixing with the material on the outer wall of the adjacent pipe. The material is mixed multiple times to make the entire The temperature of the cross-section material tends to be uniform, and it will flow out from the bottom of the reaction chamber after reaching the process requirements.

The present invention sets the circulating coil into a specific wave-shaped structure (that is, the coil is wound into a vertical wave shape), and arranges the full-section overlapping arrangement, thereby increasing the total length of the circulating coil group and improving the heat transfer effect. At the same time, the materials are fully back-mixed to improve the uniformity of the temperature of the entire cross-section.

In the present invention, the reactor shell 1 is provided with a reaction raw material inlet and a reaction product outlet connected to the reaction chamber 12 . The circulation coil assembly 4 is arranged between the reaction raw material inlet and the reaction product outlet. Preferably, the reaction raw material inlet is located at the top of the reactor shell 1 and the reaction product outlet is located at the bottom of the reactor shell 1 . The reactor of the present invention may also include an inlet nozzle 5 connected to the medium inlet of the reactor shell 1 and an outlet nozzle 6 connected to the medium outlet of the reactor shell 1 .

By adopting the above technical solutions, the reactor of the present invention has the following technical effects compared with conventional polymerization reactors:

The present invention reduces the length difference between the coils of the conventional polymerization reactor by combining the lengths of the circulation coils, that is, the longer circulation coils and the shorter circulation coils are connected in series, thereby reducing the replacement cost. The resistance difference of the heat medium makes the heat exchange medium evenly distributed, avoiding the impact on the temperature difference control of the reactor due to uneven distribution of the heat exchange medium in the coil tube, and ensuring the quality of the product;

By arranging the collection channel in the arcuate area close to the wall of the cylindrical reactor, the present invention can eliminate the defect of no coil in the arcuate area, remove the reaction heat in time, and facilitate temperature control.

The reactor of the present invention has a simple structure, is not limited by the diameter of the reactor, and has strong adaptability. The flow rate of the heat exchange medium (such as hot oil) in the parallel circulating coil group is relatively uniform, and the circulating coil can cover the entire reaction chamber 12. There is no coil-free zone, and the temperature is more uniformly controlled throughout the cavity.

In the present invention, the collection plate, circulation coil and winding pipe can be manufactured as a unit module respectively. After the manufacturing is completed, they are connected by welding, which is easy to install and has a wide application range.

The reactor of the present invention can be any reactor that requires uniform internal temperature control, such as a polymerization reactor for polymerization.

A second aspect of the present invention provides a reaction device, including a medium circulation system and the above-mentioned reactor, The medium circulation system includes a medium output pipeline and a medium recovery pipeline. The medium output pipeline is connected to the medium inlet of the reactor shell 1, and the medium recovery pipeline is connected to the media outlet of the reactor shell 1.

Specifically, the medium output pipeline can be connected to the inlet pipe 5 , and the medium recovery pipeline can be connected to the outlet pipe 6 . The heat exchange medium of the medium circulation system enters the first collection channel 11 through the medium output pipeline, and is distributed into each circulation coil group through the first collection plate 2. The heat exchange medium flowing through each circulation coil group passes through the second collection plate 3 Enter the second collection channel 13, and then enter the medium recovery pipeline through the outlet pipe 6.

The medium mentioned above is a heat exchange medium, such as a cooling medium.

Among the above, the medium circulation system may also include a circulation pump, which is disposed between the medium output pipeline and the medium recovery pipeline.

A third aspect of the present invention provides a reaction method, which reaction method includes reacting the reaction raw materials in the above-mentioned reaction device, and at least part of the reaction time is performed in the presence of a cooling medium.

In some embodiments, the reaction described above is a polymerization reaction.

The invention also provides a polymerization reactor for uniform temperature control, including a shell (corresponding to the above-mentioned reactor shell 1), a manifold channel (corresponding to the above-mentioned first and second manifold channels 11, 13) and multiple groups of parallel Circulation coil group; the collecting pipe channel is arranged on the shell, and a collecting pipe inlet nozzle (corresponding to the above-mentioned inlet nozzle 5) is connected with the collecting pipe channel (i.e. the first collecting channel 11) on one side. The outlet nozzle (corresponding to the above-mentioned outlet nozzle 6) is connected to the collection pipe channel (i.e. the second collection channel 13) on the opposite side; the inlet and outlet of the circulating coil group are connected to the collection pipe channels on both sides respectively; One set of coils includes an inlet bottom coil (corresponding to the above-mentioned inlet bottom coil 42), a circulation coil group and an outlet bottom coil. One end of the circulation coil group is connected to the inlet bottom coil, and the The other end of the circulating coil group is connected with the outlet bottom coil.

In some embodiments, the circulating coil set includes multiple sets of circulating coils connected in series, connected by top windings.

In some embodiments, the circulating coil is in the shape of a sheet, with both sides of the long side close to the Said shell.

In some embodiments, the housing is a tubular structure, and two plate structures are respectively fixed on the inner wall of the housing, and the collecting tube channel is surrounded on the opposite side of the inner wall of the housing.

In some embodiments, the circulation coil is parallel to the plate structure.

In some embodiments, the interior space of the housing between the two plate structures is equally divided by the circulating coil set.

In some embodiments, the internal space of the housing between the two plate structures is divided into a first area and a second area by the plane of the central axis of the housing, and the first area is close to the manifold. The inlet nozzle, the second area is close to the manifold outlet nozzle; the first circulation coil in the first area is far away from the manifold inlet nozzle and the first circulation coil in the second area is close to the manifold outlet nozzle. The circulation coil is connected through the top winding pipe. The second circulation coil in the first area far away from the manifold inlet nozzle and the second circulation coil in the second area close to the manifold outlet nozzle are connected through the top winding pipe. connected, and so on.

In some embodiments, the inlet bottom pipes are arranged at different levels in batches.

In some embodiments, the bottom of the outlet is at different levels around the pipe in batches.

In some embodiments, the top coils are batched at different levels.

The invention also provides an internal heat exchange coil for improving material heat exchange efficiency and temperature uniformity, including: a shell (corresponding to the above-mentioned reactor shell 1), and a device polymer solution opened on the top of the shell. The inlet, the equipment polymer solution outlet opened at the bottom of the casing, the first collection pipe channel (corresponding to the above-mentioned second collection channel 13) provided on the first side of the casing, the second collection pipe channel 13 provided on the second side of the casing. The second collection pipe channel (corresponding to the above-mentioned first collection channel 11) and the coil group (corresponding to the above-mentioned circulation coil assembly 4) provided inside the housing; wherein, the first side and the second Corresponding settings on the side.

In some embodiments, the coil group includes a first coil (corresponding to the above-mentioned circulation coil 41) and a second coil (corresponding to the above-mentioned circulation coil 41), and the first coil and the third coil are The two coils are in the shape of intertwined waves.

In some embodiments, a plurality of bending angles are provided in the middle portions of the first coiled tube and the second coiled tube.

In some embodiments, the first coiled tubes and the second coiled tubes are arranged in a staggered and overlapping manner.

In some embodiments, the bending angle is an angle of 30°-150°.

In some embodiments, the outer top of the first manifold channel is provided with a manifold outlet nozzle (corresponding to the above-mentioned outlet nozzle 6), and the outer top of the second manifold channel is provided with a manifold inlet nozzle (corresponding to the above-mentioned outlet nozzle 6). The above inlet takes over 5).

In some embodiments, the manifold outlet pipe is connected with the output end of the coil group, and the manifold inlet pipe is connected with the input end of the coil group.

In some embodiments, a circulation pump is connected to a pipeline between the manifold inlet pipe and the manifold outlet pipe.

Up to this point, various embodiments of the present invention have been described in detail. In order to avoid obscuring the inventive concept, some details that are well known in the art have not been described. Based on the above description, those skilled in the art can completely understand how to implement the technical solution disclosed here.

Although some specific embodiments of the invention have been described in detail by way of examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the invention. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

A reactor, characterized in that it includes:

Reactor shell (1), the reactor shell (1) defines a cylindrical inner cavity;

The first collecting plate (2) and the second collecting plate (3) are arranged on both radial sides of the inner cavity to collect The inner cavity is divided into a first collection channel (11), a reaction chamber (12), and a second collection channel (13) arranged sequentially in the radial direction; and

Circulation coil assembly (4), the circulation coil assembly (4) is arranged in the reaction chamber (12), the circulation coil assembly (4) has a medium inlet and a medium outlet,

Wherein, the reactor shell (1) is provided with a medium inlet connected to the first collection channel (11) and a medium outlet connected to the second collection channel (13), and the first collection plate (2) is provided with a first communication port (21) that connects the first collection channel (11) and the medium inlet of the circulation coil assembly (4), and the second collection plate (3) is provided with The second communication port (31) communicates the second collective channel (13) with the medium outlet of the circulation coil assembly (4).
The reactor according to claim 1, wherein the first collecting plate (2) and the second collecting plate (3) are respectively formed as arcuate plates extending along the axial direction of the inner cavity, And both are arranged symmetrically with respect to the plane of the central axis of the inner cavity; and/or

The medium inlet of the reactor shell (1) corresponds to the upper part of the first collection channel (11), and the medium outlet of the reactor shell (1) corresponds to the second collection channel (13) is provided at the upper part of set up.
The reactor according to claim 1 or 2, characterized in that the circulation coil assembly (4) includes a plurality of circulation coil groups connected in parallel, each of the circulation coil groups having a medium inlet and a medium outlet. , the first collection plate (2) is provided with a plurality of circulation coil groups and a plurality of There are a plurality of first communication ports (21) corresponding one-to-one to the medium inlets, and a plurality of second communication ports (21) corresponding one-to-one to the plurality of medium outlets of the plurality of circulation coil groups are provided on the second collection plate (3). Connecting port (31).
The reactor according to claim 3, wherein the medium strokes between the plurality of circulation coil groups are approximately equal.
The reactor according to claim 4, characterized in that the circulation coil assembly (4) includes a plurality of circulation coils (41), and the plurality of circulation coils (41) are along the diameter of the inner cavity. The reaction chamber (12) is divided into a first area close to the first collection plate (2) and a first area close to the second collection plate (3) by the plane of the central axis of the inner cavity. In the second area, the number of circulating coils (41) located in the first area is consistent with the number of circulating coils (41) located in the second area;

Wherein, the medium inlet of the circulation coil (41) located in the first area is connected to the first communication port (21) through the inlet bottom coil (42), and the circulation coil (41) located in the second area is connected to the first communication port (21). ) is connected to the second communication port (31) through the outlet bottom coil (43); along the direction from the first area to the second area, the circulation coil located in the first area (41) is connected to the circulating coil (41) located in the second area through the top coil (44) in sequence;

Among them, the corresponding two circulation coils (41) located in the first area and the second area as well as the corresponding inlet bottom coil (42), outlet bottom coil (43) and top coil (44 ) together form the circulating coil group.
The reactor according to claim 5, characterized in that,

The circulation coil (41) is generally in the shape of a square sheet, and both axial sides of each circulation coil (41) are respectively disposed close to the inner wall of the reactor shell (1); and/or

The circulation coil (41) is parallel to the first collection plate (2) and the second collection plate (3), A plurality of the circulation coils (41) are evenly spaced along the radial direction of the inner cavity to divide the reaction chamber (12) into equal parts.
The reactor according to claim 5 or 6, characterized in that the circulation coil assembly (4) has at least one of the following arrangements:

Method 1. A plurality of the inlet bottoms are arranged around the pipe (42) in groups at different heights on the horizontal plane.

Method 2: A plurality of outlet bottom pipes (43) are grouped and arranged on horizontal planes at different heights.

Method 3: A plurality of the top winding pipes (44) are arranged in groups on horizontal planes of different heights.
The reactor according to claim 7, characterized in that,

A plurality of the inlet bottom coils (42) are divided into two groups and arranged on two horizontal planes with different heights, and the corresponding inlet bottom coils (42) of the adjacent circulation coils (41) are located on different horizontal planes, The inlet bottom winding pipe (42) is an L-shaped elbow;

A plurality of the outlet bottom coils (43) are divided into two groups and arranged on two horizontal planes with different heights, and the corresponding outlet bottom coils (43) of the adjacent circulation coils (41) are located on different horizontal planes, The outlet bottom winding pipe (43) is an L-shaped bent pipe;

The plurality of top coils (44) are divided into two groups and arranged on two horizontal planes with different heights, and the corresponding top coils (44) of the adjacent circulation coils (41) are located on different horizontal planes. The top winding pipe (44) is a straight pipe;

The plurality of first communication openings (21) are arranged in two groups on two horizontal planes with different heights, and the plurality of second communication openings (31) are arranged in two groups on two horizontal planes with different heights.
The reactor according to any one of claims 5-8, characterized in that,

The circulation coil (41) is a serpentine tube, and the bending directions of two adjacent circulation coils (41) are perpendicular to each other; or

The circulation coil (41) is a corrugated tube, and the two adjacent circulation coils (41) The waves are set in a staggered pattern.
The reactor according to claim 9, characterized in that the bending angle α of the waves of the circulation coil (41) is 30° to 150°.
The reactor according to any one of claims 1 to 10, characterized in that the reactor shell (1) is provided with a reaction raw material inlet and a reaction product outlet connected to the reaction chamber (12), The circulation coil assembly (4) is arranged between the reaction raw material inlet and the reaction product outlet.
A reaction device, characterized in that it includes a medium circulation system and the reactor according to any one of claims 1 to 11, the medium circulation system includes a medium output pipeline and a medium recovery pipeline, the medium output pipeline The medium recovery pipeline is connected with the medium inlet of the reactor shell (1), and the medium recovery pipeline is connected with the medium outlet of the reactor shell (1).
A reaction method, characterized in that the reaction method includes reacting the reaction raw materials in the reaction device of claim 12, and at least part of the reaction time is performed in the presence of a cooling medium.
The reaction method according to claim 13, characterized in that the reaction is a polymerization reaction.
The reaction method according to claim 14, characterized in that the monomer used in the polymerization reaction contains styrene.