A supergravity type continuous flow reactor

Abstract

The application discloses a supergravity type continuous flow reactor, which comprises n layers of heat exchange reaction modules, wherein n is an integer greater than or equal to 1; each heat exchange reaction module comprises a shell, a cover plate arranged at the upper end of the shell, an internal heat exchange pipeline structure arranged in the shell and a rotating structure; the rotating structure comprises a rotating shaft, a rotor and multiple concentric variable-diameter moving coils; material heat exchange cavities are formed between the moving coils; the most central moving coil forms a material mixing cavity; the internal heat exchange pipeline structure comprises multiple groups of circulating heat exchange pipe groups arranged in the material heat exchange cavities; each group of circulating heat exchange pipe groups comprises one heat exchange inlet pipe branch pipe, one heat exchange outlet pipe branch pipe and one group of annular branch pipes; the two ends of the annular branch pipes are vertically connected with the heat exchange inlet pipe branch pipe and the heat exchange outlet pipe branch pipe respectively; the annular branch pipes are parallel to the annular branch pipes and coaxial with the moving coils; the annular branch pipes are located in the material heat exchange cavities; and the heat exchange inlet pipe branch pipe and the heat exchange outlet pipe branch pipe are vertically arranged in the material heat exchange cavities. The application increases the heat exchange area and improves the heat exchange efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical equipment, and particularly relates to a high-gravity continuous flow reactor. Background Art

[0002] Commonly used reactor equipment in the chemical industry include tubular reactors and kettle reactors. Among them, kettle reactors are often equipped with stirring devices in the reactor to mix liquid reactants. They have the characteristics of low reaction efficiency and difficulty in achieving continuous production. Supergravity reactors are a new type of equipment for intensifying chemical industrial processes. The extremely large centrifugal acceleration can shear and highly disperse the liquid, increase the mass transfer specific surface area, improve the liquid surface renewal rate, greatly enhance the gas-liquid and liquid-liquid mass transfer processes, and are often used in industrial processes such as distillation, absorption, and separation.

[0003] Chinese patent CN210410646U discloses a high-gravity external circulation reactor for heterogeneous catalytic reactions. It can enhance the mass transfer efficiency of heterogeneous catalytic reactions and strengthen heterogeneous catalytic reactions such as liquid-liquid-solid and gas-liquid-solid reactions. However, its internal packing has a high pressure drop and a small heat exchange area, which cannot remove the reaction heat in time. Summary of the Invention

[0004] In view of the above problems, the object of the present invention is to provide a high-gravity continuous flow reactor.

[0005] The specific technical solutions are as follows:

[0006] A supergravity continuous flow reactor comprises n layers of heat exchange reaction modules, where n is an integer and is greater than or equal to 1. Each layer of the heat exchange reaction modules comprises a shell, a cover plate arranged at the upper end of the shell, an internal heat exchange piping structure arranged in the shell, and a rotating structure. The rotating structure comprises a rotating shaft, a rotor vertically connected to the rotating shaft, and a plurality of concentric and different-diameter moving rings vertically arranged on the upper surface of the rotor. A material heat exchange cavity is formed between the moving rings, and the moving ring in the center constitutes a material mixing cavity. The internal heat exchange piping structure comprises multiple groups of circulating heat exchange tube groups arranged in the material heat exchange cavity. Each group of circulating heat exchange tube groups comprises a heat exchange inlet branch pipe, a heat exchange outlet branch pipe, and a group of annular branches. The two ends of a group of annular branches are respectively vertically connected to the heat exchange inlet branch pipe and the heat exchange outlet branch pipe, and the annular branches are parallel to each other. The annular branch pipe is located in the material heat exchange cavity and is coaxial with the moving ring. The heat exchange inlet branch pipe and the heat exchange outlet branch pipe are vertically arranged in the material heat exchange cavity.

[0007] Further, the internal heat exchange pipeline structure further comprises a heat exchange total inlet pipe, a heat exchange total outlet pipe, a heat exchange main inlet pipe and a heat exchange main outlet pipe, the heat exchange total inlet pipe is connected with the heat exchange main inlet pipe, the heat exchange main inlet pipe is provided with a plurality of connecting openings corresponding to the heat exchange inlet pipe branch pipes of the plurality of groups of circulating heat exchange pipe groups, the heat exchange main outlet pipe is connected with the heat exchange total outlet pipe, and the heat exchange main outlet pipe is provided with a plurality of connecting openings corresponding to the heat exchange outlet pipe branch pipes of the plurality of groups of circulating heat exchange pipe groups.

[0008] Further, the shell is externally provided with a jacket heat exchanger, the lower end of the jacket heat exchanger is connected with a jacket heat exchange medium inlet pipe, and the upper end of the jacket heat exchanger is connected with a jacket heat exchange medium outlet pipe.

[0009] Further, the rotor is provided with stirring blades, and the stirring blades are located in the material mixing cavity.

[0010] Further, the top of the uppermost heat exchange reaction module is connected with a material inlet pipe and an exhaust pipe, the material inlet pipe extends into the material mixing cavity of the uppermost layer, and the bottom of the lowermost heat exchange reaction module is provided with a material outlet pipe; when n is 1, the top of the uppermost heat exchange reaction module is further connected with an air inlet pipe, when n is greater than 1, the heat exchange reaction modules are communicated with each other, and the bottom of the lowermost heat exchange reaction module is connected with an air inlet pipe.

[0011] Further, the inner diameters of the heat exchange inlet pipe branch pipes and the heat exchange outlet pipe branch pipes are 3-6 mm, and the thickness of the moving ring is 0.5-3 mm.

[0012] Further, the moving ring is uniformly distributed with sieve holes in a height range of 10%-40% of the total height of the moving ring from top to bottom.

[0013] Further, thermometers are arranged at the material inlet pipe and the material outlet pipe, and pressure gauges are arranged at the exhaust pipe and the air inlet pipe.

[0014] Further, the distance between the moving rings is 5-20 mm, and the inner diameter of the annular branch pipe is 3-6 mm.

[0015] The beneficial effects of the present application are as follows:

[0016] The present application uniformly arranges a plurality of heat exchange inlet pipe branch pipes, heat exchange outlet pipe branch pipes and annular branch pipes in the material heat exchange cavity, thereby further increasing the heat exchange area of the internal heat exchange pipeline structure, improving the heat exchange efficiency and being suitable for liquid-liquid-gas, gas-liquid-solid and other continuous flow reactions. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the present application when n is 1 and the annular branch pipe is removed.

[0018] Figure 2 It is a structural schematic view of the circulating heat exchange pipe group.

[0019] Figure 3 It is a top view from above the cover;

[0020] Figure 4 Schematic cross-sectional view after removing the annular branch when n>1 layer.

[0021] In the figure: 1. Shell; 2. Cover plate; 3. Internal heat exchange piping structure; 31. Circulating heat exchange tube group; 311. Heat exchange inlet branch; 312. Heat exchange outlet branch; 313. Annular branch; 32. Heat exchange main inlet pipe; 33. Heat exchange main outlet pipe; 34. Heat exchange main inlet pipe; 35. Heat exchange main outlet pipe; 4. Rotating structure; 41. Rotating shaft; 42. Rotor; 421. Stirring blade; 43. Moving coil; 5. Jacketed heat exchanger; 51. Jacketed heat exchange medium inlet pipe; 52. Jacketed heat exchange medium outlet pipe; 6. Material inlet pipe; 7. Material outlet pipe; 8. Exhaust pipe; 9. Inlet pipe. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings, but the protection scope of the present invention is not limited thereto.

[0023] like Figure 2 As shown, the circulating heat exchange tube group 31 includes a heat exchange inlet branch 311, a heat exchange outlet branch 312 and multiple annular branches 313. The multiple annular branches 313 are arranged vertically and in parallel, with their centers on the same axis and equal diameters. The heat exchange inlet branch 311 and the heat exchange outlet branch 312 are vertically arranged, welded on the sides, and sealed at the bottom. The two ends of each annular branch 313 are respectively vertically connected to the heat exchange inlet branch 311 and the heat exchange outlet branch 312. The inner diameters of the heat exchange inlet branch 311 and the heat exchange outlet branch 312 are 3-6 mm, and the inner diameter of the annular branch 313 is 3-6 mm.

[0024] like Figure 3 As shown, the internal heat exchange piping structure 3 includes a heat exchange main inlet pipe 32, a heat exchange main outlet pipe 33, a heat exchange main inlet pipe 34 and a heat exchange main outlet pipe 35. The heat exchange main inlet pipe 32 is connected to the heat exchange main inlet pipe 34. The heat exchange main inlet pipe 34 is provided with multiple connection ports, which respectively correspond to the heat exchange inlet pipe branches 311 connecting multiple groups of circulating heat exchange tube groups 31. The heat exchange main outlet pipe 35 is connected to the heat exchange main outlet pipe 33. The heat exchange main outlet pipe 35 is provided with multiple connection ports, which respectively correspond to the heat exchange outlet pipe branches 312 connecting multiple groups of circulating heat exchange tube groups 31.

[0025] Example 1

[0026] like Figure 1As shown, a supergravity continuous flow reactor, when n is 1 layer, includes 1 layer of heat exchange reaction module, the heat exchange reaction module includes a shell 1, a cover plate 2 provided at the upper end of the shell 1 and connected to the shell 1 with bolts, an internal heat exchange pipeline structure 3 and a rotating structure 4 provided in the shell 1, the rotating structure 4 includes a rotating shaft 41, a rotor 42 vertically connected to the rotating shaft 41 and a plurality of concentric and different diameter moving rings 43 vertically provided on the upper surface of the rotor 42, the rotating shaft 41 extends from the bottom of the shell 1 into the shell 1, the connection between the rotating shaft 41 and the shell 1 adopts a mechanical seal, the upper end of the rotating shaft 41 is vertically connected to the rotor 42, the moving rings 43 and the moving rings 43 form a material heat exchange cavity, and the moving ring in the center 43 constitutes a material mixing cavity, the thickness of the moving coil 43 is 1 mm, and sieve holes are evenly distributed within a range of 45 mm from top to bottom on the top of the moving coil 43; the heat exchange main inlet pipe 32, the heat exchange main outlet pipe 33, the heat exchange main inlet pipe 34 and the heat exchange main outlet pipe 35 are laid flat on the upper surface of the cover plate 2, the heat exchange main inlet pipe 34 and the heat exchange main outlet pipe 35 are respectively connected to the heat exchange inlet pipe branch 311 or the heat exchange outlet pipe branch 312, and multiple groups of heat exchange inlet pipe branches 311 and heat exchange outlet pipe branches 312 extend vertically downward to the material heat exchange cavity between the moving coils 43 and 43. Each group of annular branches 313 is located in the material heat exchange cavity between the moving coils 43 and 43, and is coaxial with the moving coil 43. A jacketed heat exchanger 5 is installed outside the shell 1. The lower end of the jacketed heat exchanger 5 is connected to a jacketed heat exchange medium inlet pipe 51, and the upper end is connected to a jacketed heat exchange medium outlet pipe 52. The rotor 42 is equipped with stirring blades 421, which are located within the material mixing cavity. The top of the heat exchange reaction module is connected to a material inlet pipe 6 and an air outlet pipe 8, which extend into the material mixing cavity. The bottom of the heat exchange reaction module is equipped with a material outlet pipe 7, and the top of the heat exchange reaction module is connected to an air inlet pipe 9. Thermometers measure the temperature at the material inlet pipe 6 and the material outlet pipe 7; pressure gauges measure the pressure at the air outlet pipe 8 and the air inlet pipe 9.

[0027] The device data in this embodiment is as follows:

[0028] The shell 1 is cylindrical as a whole, with an inner diameter of 0.6m and a height of 0.4m. The thickness of the shell 1 is 4mm, the spacing between the moving coils 43 is 15mm, the inner diameter of the heat exchange inlet branch 311 and the heat exchange outlet branch 312 is 6mm, each group of circulating heat exchange tube groups 31 includes 20 annular branches 313, the diameter of the rotor 42 is 0.5m, the thickness is 4mm, the height of the moving coil 43 is 0.35m, the length of the stirring blade 421 is 20mm, the thickness is 6mm, and the height is 50mm.

[0029] When n is 1 layer, that is, a single-layer heat exchange reaction module, the reaction process is as follows: the solid-liquid or liquid-liquid mixture material is heated to the corresponding temperature and enters from the material inlet pipe 6, and the gas enters from the air inlet pipe 9. The material is dispersed and mixed by the stirring blades 421 in the material mixing cavity of the rotor 42. Under the centrifugal force of the rotor 42 driven by the rotating shaft 41, the material flows out through the sieve holes and the edge of the moving coil 43 to the material heat exchange cavity between the moving coils 43 and 43. The heat exchange medium enters the heat exchange main inlet pipe 34 from the heat exchange main inlet pipe 32, and is then distributed to multiple heat exchange inlet branch pipes 311. The heat exchange medium in the heat exchange inlet branch pipe 311 is further distributed to the corresponding multiple annular branch pipes 313. The material in the material heat exchange cavity is fully heat exchanged. After the material is thrown out of the material heat exchange cavity, the jacketed heat exchanger 5 further exchanges heat with the material in the shell 1, and finally flows out from the material outlet pipe 7 at the bottom.

[0030] Specific product examples are as follows:

[0031] KOH catalyst was dissolved in methanol to form a methanol-KOH solution. This methanol-KOH solution was then mixed with soybean oil, with the mass of KOH accounting for 1% of the mass of soybean oil, and the ratio of methanol to soybean oil being 1:5. The methanol-KOH-soybean oil mixture was heated to 70°C and then pumped into a continuous flow reactor at a feed rate of 96 mL / min. 80°C constant-temperature water was passed through the heat exchange jacket for insulation. Condensate was introduced into the internal heat exchange piping structure 3. The reactor speed was set at 800 rpm. The material passed through rotor 42 and ultimately exited through material outlet pipe 7 at the bottom of housing 1. Samples were collected and analyzed after one hour of reaction, revealing a soybean oil conversion rate of 97.5%.

[0032] Example 2

[0033] like Figure 4 As shown, when n=3, it includes 3 layers of heat exchange reaction modules, and the structure of each layer of heat exchange reaction modules is mostly the same as when n=1 layer. The difference is that the air inlet pipe 9 is arranged at the bottom of the heat exchange reaction module of the lowest layer, and the top of the heat exchange reaction module of the uppermost layer is connected to the material inlet pipe 6 and the air outlet pipe 8. The material inlet pipe 6 extends to the material mixing cavity of the uppermost layer. The bottom of the heat exchange reaction module of the lowest layer is provided with a material outlet pipe 7, and the middle of the cover plate 2 of the middle and bottom heat exchange reaction modules is provided with an opening to ensure that the heat exchange reaction modules are connected to the heat exchange reaction modules. The rotating shaft 41 extends from the bottom of the shell 1 of the heat exchange reaction module of the lowest layer into the shell 1 of other heat exchange reaction modules, and passes through the top of the heat exchange reaction module of the uppermost layer. The shell 1 and the upper end of the rotating shaft 41 are also mechanically sealed. The three rotors 42 are respectively connected to the rotating shaft 41 vertically and are respectively located in the corresponding heat exchange reaction modules.

[0034] Thermometers are provided at the material inlet pipe 6 and the material outlet pipe 7, and pressure gauges are provided at the air outlet pipe 8 and the air inlet pipe 9.

[0035] The device data in this embodiment is as follows:

[0036] The inner diameter of the shell 1 of each layer of heat exchange reaction module is about 0.6 m, the height is about 0.4 m, the thickness of the shell 1 is about 4 mm, the distance between the moving ring 43 and the moving ring 43 is 15 mm, the inner diameter of the heat exchange inlet pipe branch 311 and the heat exchange outlet pipe branch 312 is 6 mm, each group of circulating heat exchange pipe group 31 includes 20 annular branches 313, the diameter of the rotor 42 is 0.5 m, the thickness is 4 mm, the height of the moving ring 43 is 0.35 m, the length of the stirring blade 421 is 20 mm, the thickness is 6 mm, and the height is 50 mm.

[0037] When n>1 layers, that is, multiple layers of heat exchange reaction modules, the reaction process is as follows: solid-liquid or liquid-liquid mixture material is heated to the corresponding temperature, enters from the material inlet pipe 6, gas enters from the gas inlet pipe 9, and the two are dispersed and mixed in the material mixing cavity of the rotor 42 of the upper first layer of heat exchange reaction module by the stirring blade 421, under the action of the centrifugal force of the rotating shaft 41 driving the rotor 42, it flows out to the material heat exchange cavity between the moving ring 43 and the moving ring 43 through the sieve hole and the edge of the moving ring 43, the heat exchange medium enters the heat exchange main inlet pipe 34 from the heat exchange total inlet pipe 32, and then is distributed to multiple heat exchange inlet pipe branches 311, the heat exchange medium in the heat exchange inlet pipe branch 311 is further distributed to the corresponding multiple annular branches 313, the material in the material heat exchange cavity is fully heat exchanged, after the material is thrown out of the material heat exchange cavity, the material in the shell 1 is further heat exchanged by the jacket heat exchanger 5, and then flows out from the top of the cover plate 2 of the next layer into the material mixing cavity of the rotor 42 of the next layer, is dispersed and centrifuged again, is heat exchanged, and enters the next layer to repeat the above process, and finally flows out from the bottom of the shell 1 of the lowermost layer by the material outlet pipe 7.

Claims

1. A high gravity continuous flow reactor, characterized in that: The invention comprises n layers of heat exchange reaction modules, where n is an integer and is greater than or equal to 1. Each layer of heat exchange reaction modules comprises a shell (1), a cover plate (2) arranged at the upper end of the shell (1), an internal heat exchange pipeline structure (3) arranged in the shell (1), and a rotating structure (4). The rotating structure (4) comprises a rotating shaft (41), a rotor (42) vertically connected to the rotating shaft (41), and a plurality of concentric and different-diameter moving rings (43) vertically arranged on the upper surface of the rotor (42). A material heat exchange cavity is formed between the moving rings (43) and the moving ring (43) at the center forms a material mixing cavity. The internal heat exchange pipeline structure (3) comprises a plurality of circulating heat exchange tube groups (31) arranged in the material heat exchange cavity. Each circulating heat exchange tube group (31) includes a heat exchange inlet branch pipe (311), a heat exchange outlet branch pipe (312) and a group of annular branch pipes (313), wherein the group of annular branch pipes (313) includes a plurality of annular branch pipes (313), and the two ends of the group of annular branch pipes (313) are respectively vertically connected to the heat exchange inlet branch pipe (311) and the heat exchange outlet branch pipe (312), the lower ends of the heat exchange inlet branch pipe (311) and the heat exchange outlet branch pipe (312) are sealed, and the annular branch pipes (313) and the annular branch pipes (313) are parallel to each other, the annular branch pipe (313) is located in the material heat exchange cavity and is coaxial with the moving coil (43), and the heat exchange inlet branch pipe (311) and the heat exchange outlet branch pipe (312) are vertically arranged in the material heat exchange cavity; The top of the heat exchange reaction module in the uppermost layer is connected to a material inlet pipe (6) and an air outlet pipe (8), and the material inlet pipe (6) extends into the material mixing cavity in the uppermost layer. The bottom of the heat exchange reaction module in the lowermost layer is provided with a material outlet pipe (7). When n is 1 layer, the top of the heat exchange reaction module in the uppermost layer is also connected to an air inlet pipe (9). When n>1 layer, the heat exchange reaction modules are connected to each other, and the bottom of the heat exchange reaction module in the lowermost layer is connected to an air inlet pipe (9). The top of the moving coil (43) is evenly distributed with sieve holes within a height range of 10%-40% of the total height of the moving coil (43) from top to bottom.

2. A high gravity continuous flow reactor according to claim 1, characterized in that: The internal heat exchange piping structure (3) further comprises a heat exchange main inlet pipe (32), a heat exchange main outlet pipe (33), a heat exchange main inlet pipe (34) and a heat exchange main outlet pipe (35). The heat exchange main inlet pipe (32) is connected to the heat exchange main inlet pipe (34). The heat exchange main inlet pipe (34) is provided with multiple connection ports, which respectively correspond to the heat exchange inlet pipe branches (311) connected to the multiple groups of circulating heat exchange pipe groups (31). The heat exchange main outlet pipe (35) is connected to the heat exchange main outlet pipe (33). The heat exchange main outlet pipe (35) is provided with multiple connection ports, which respectively correspond to the heat exchange outlet pipe branches (312) connected to the multiple groups of circulating heat exchange pipe groups (31).

3. A high gravity continuous flow reactor as claimed in claim 2, characterized in that: A jacketed heat exchanger (5) is provided outside the shell (1). The lower end of the jacketed heat exchanger (5) is connected to a jacketed heat exchange medium inlet pipe (51), and the upper end is connected to a jacketed heat exchange medium outlet pipe (52).

4. A high gravity continuous flow reactor as claimed in claim 3, characterized in that: The rotor (42) is provided with a stirring blade (421), and the stirring blade (421) is located in the material mixing cavity.

5. A high gravity continuous flow reactor as claimed in claim 4, characterized in that: The inner diameters of the heat exchange inlet branch pipe (311) and the heat exchange outlet branch pipe (312) are 3-6 mm, and the thickness of the moving coil (43) is 0.5-3 mm.

6. A high gravity continuous flow reactor as claimed in claim 5, characterized in that: The material inlet pipe (6) and the material outlet pipe (7) are provided with thermometers, and the air outlet pipe (8) and the air inlet pipe (9) are provided with pressure gauges.

7. A high gravity continuous flow reactor as claimed in claim 2, characterized in that: The spacing between the moving coils (43) and the moving coils (43) is 5-20 mm, and the inner diameter of the annular branch pipe (313) is 3-6 mm.

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