A dynamic and static combined high viscosity material reactor

Abstract

The application discloses a dynamic and static combined high-viscosity material reactor, which comprises a cylinder, a stirring shaft, a head part, a flange and a gasket. The cylinder comprises a main channel, a first inlet, a second inlet, a groove group and an outlet. The stirring shaft is installed in the cylinder and is positioned by bearings and is used for stirring and transporting the feed. The head part comprises a head, bearings and mechanical seals. The gasket is used for sealing between the flange and the head. The special shaft structure can improve the mixing efficiency of solid-liquid two phases, especially the mixing of high-viscosity solid and liquid. The grooves on the inner wall of the cylinder can disturb the two-phase liquid, so that the solid-liquid mixing effect can be effectively improved and the mixing is more sufficient.

Description

Technical Field

[0001] This invention relates to the field of chemical reaction equipment technology, specifically to a reactor for high-viscosity substances that combines dynamic and static methods. Background Technology

[0002] The mixing and reaction of solid and liquid materials, especially high-viscosity solid materials, is a common problem in industrial production and is of great significance to the chemical, petroleum, food and pharmaceutical industries.

[0003] Traditional mixing reactors typically employ passive mixing, which is suitable for liquid-liquid or gas-liquid reactions with good flowability. However, it is unsuitable for reactions involving or producing highly viscous solids or liquids. Relying on the equipment's own channel structure for autonomous mixing results in poor mixing efficiency, failing to fully mix the solid or liquid materials fed into the reactor. This leads to prolonged reaction times, incomplete material mixing, increased workload for operators, and batch defects due to poor mixing, rendering the produced products unusable in chemical production and causing economic losses to the factory. Therefore, there is an urgent need for a reaction equipment that can achieve uniform mixing of high-viscosity solid-liquid materials. Summary of the Invention

[0004] The purpose of this invention is to provide a reactor for high-viscosity materials that combines dynamic and static methods, which solves the problem of uneven mixing of high-viscosity solids and liquids, increases the Reynolds number, improves mixing efficiency, and can achieve uniform dispersion of solid and liquid materials.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A reactor for highly viscous substances that combines dynamic and static design includes a cylindrical body, a stirring shaft, a head section, and a flange.

[0007] The cylinder is a straight cylindrical tube with open ends. A first inlet and a second inlet are provided on the outer wall of one end of the cylinder, and an outlet is provided on the outer wall of the other end. The inner wall of the cylinder has a set of grooves for changing the fluid flow trajectory. A flange is provided at each end of the cylinder. Two end caps are respectively connected to the flanges at both ends of the cylinder. The end caps are separately provided with holes for mounting a stirring shaft. The stirring shaft is located inside the cylinder, with both ends of the stirring shaft passing through the holes in the end caps.

[0008] The portion of the stirring shaft located inside the cylinder is equipped with multiple fixing rings, four fixing baffles, and multiple stirring blades. The fixing rings are welded to the stirring shaft at equal intervals along its axial direction. The fixing rings are also welded to and fix the fixing baffles. The fixing baffles are elongated strips used to agitate the material inside the cylinder. The four fixing baffles are evenly distributed circumferentially on the stirring shaft, with their length direction aligned with the axial direction of the stirring shaft. Multiple stirring blades are welded to each fixing baffle at equal intervals. These stirring blades are used to shear and agitate the material inside the cylinder during the rotation of the stirring shaft.

[0009] Preferably, the cylinder has a length of 640mm to 1000mm, an inner diameter of 140mm to 200mm, and a wall thickness of 7.5mm to 10mm.

[0010] Preferably, the groove group includes an axial groove structure consisting of multiple grooves arranged along the inner wall of the cylinder and parallel to the cylinder axis, and an annular groove structure consisting of multiple grooves arranged in a ring along the inner diameter of the cylinder. The inner wall of the cylinder is provided with at least one set of axial groove structure and one set of annular groove structure. The groove depth of the groove group is in the range of 2 to 5 mm.

[0011] Preferably, the fixed baffle has a length of 500-540mm, a width of 4-10mm, and a thickness of 4-8mm.

[0012] Preferably, the stirring blades include at least 6 groups; each group of stirring blades is evenly distributed along the axial direction of the stirring shaft, and the stirring blades in each group are spaced 40mm to 85mm apart, and a fixing ring is provided between every two axial stirring blades; each group of stirring blades is divided into four spirally distributed blades, which are respectively set on four fixed baffles, and the stirring range of the stirring blades accounts for 50% to 90% of the inner diameter of the cylinder.

[0013] The present invention also provides a method for promoting material reaction based on the above-described reactor, comprising the following steps:

[0014] 1) Connect the first inlet of the cylinder to the external material supply device A, connect the second inlet of the cylinder to the external material supply device B, and connect the outlet of the cylinder to the external reaction product collection device.

[0015] 2) The external A material supply device supplies material A into the reactor through the first inlet; the external B material supply device supplies material B into the reactor through the second inlet; at the same time, the stirring shaft rotates, and the fixed baffles and stirring blades on the stirring shaft are driven to rotate by the stirring shaft.

[0016] When materials A and B come into contact with the fixed baffle and stirring blade, materials A and B are subjected to the force generated by the rotation of the fixed baffle and stirring blade, resulting in strong displacement. At the same time, materials A and B are sheared by the rotation of the fixed baffle and stirring blade, causing the components of materials A and B to slide against each other and increasing the contact surface of the components, thereby achieving the purpose of mixing.

[0017] 3) As external materials are continuously fed into the cylinder and stirred, the flow trajectory of the mixture is changed by the grooves on the inner wall of the cylinder, further mixing the mixture.

[0018] 4) Under the action of the stirring shaft and the groove assembly, the mixture is fully reacted in the cylinder and then output from the outlet.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention discloses a reactor for high-viscosity substances that combines dynamic and static mixing. Because the stirring shaft of this invention can perform dynamic mixing, and the reactor inner wall is provided with vertically distributed grooves, it can change the flow trajectory of the fluid and increase the Reynolds number of the fluid in the pipe. Combining the two mixing methods can highly shear disperse high-viscosity solids and liquids, thereby increasing the mass transfer rate and transfer effect.

[0021] The unique structure of the stirring shaft, including the fixed baffle, stirring blades, and fixed ring, enables thorough mixing of the fluid, resulting in uniform material mixing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the reactor combining dynamic and static elements in this invention;

[0023] Figure 2 This is a schematic diagram of the structure of the cylinder in this invention;

[0024] Figure 3 This is a schematic diagram of the grooved inner wall of the cylinder in this invention;

[0025] Figure 4 This is a schematic diagram of the structure of the stirring shaft in this invention;

[0026] Figure 5 This is a schematic diagram of the end cap structure in this invention.

[0027] In the figure, 1-cylinder; 101-first inlet; 102-second inlet; 103-outlet; 104-groove assembly; 2-stirring shaft; 201-fixed baffle; 202-stirring blade; 203-fixed ring; 3-head section; 301-head; 302-mechanical seal; 303-bearing; 304-bolt; 305-nut; 4-gasket; 5-flange. Detailed Implementation

[0028] The present invention will be further described and illustrated below with reference to specific embodiments. The embodiments described are merely examples of the content of this disclosure and do not limit the scope of the invention. The technical features of each embodiment in the present invention can be combined accordingly, provided that there is no mutual conflict.

[0029] As attached Figure 1 As shown, this method provides a reactor for high-viscosity substances that combines dynamic and static methods, including a cylinder 1, a stirring shaft 2, a head 3, a gasket 4, and a flange 5; Figure 2 As shown, the cylinder 1 is provided with a first inlet 101, a second inlet 102, and an outlet 103. The inner wall of the cylinder 1 has several diagonally arranged groove groups 104. Figure 3 As shown, the groove groups are distributed along the inner wall of the cylinder parallel to the axis or the inner diameter of the cylinder, and the plurality of groove groups include at least two groups of mutually perpendicular grooves. The grooves in the same group are parallel to each other and equidistantly distributed and extend along the inner wall of the cylinder 1, which helps to further increase the mass transfer rate and transfer effect of the reaction; as Figure 4 As shown, a stirring shaft 2 is installed inside the cylinder 1; the stirring shaft is equipped with multiple sets of fixed baffles 201, stirring blades 202, and fixing rings 203. The fixed baffles 201 are evenly divided into 4 pieces along the circumference, the stirring blades 202 are distributed spirally, and 3 to 6 fixing rings 203 are distributed along the circumference. Figure 5 As shown, the two ends of the stirring shaft 2 are connected to the end cap through the bearing 303 inside the end cap 3, and one end of the stirring shaft 2 extending out of the cylinder is connected to the power device; the end cap 301, gasket 4 and flange 5 at both ends of the cylinder 1 are connected by bolts 304 and nuts 305; the end cap is equipped with a mechanical seal to seal the cylinder.

[0030] Preferably, the baffles are arranged sequentially along the circumference, and each baffle has a flat plate structure. The stirring blades include at least six groups, each group evenly distributed along the stirring shaft, with a spacing of 40mm to 85mm between each group. Each group of stirring blades consists of four spirally distributed blades. The thickness of the stirring blades is 3 to 8mm, and the height of the stirring blades is 7 to 10mm. The stirring blade 202 is flat, and the flat surface of the stirring blade is perpendicular to the surface of the fixed baffle used for welding. There is a deflection angle between the flat surface of the stirring blade 202 and the surface perpendicular to the stirring shaft axis, the deflection angle being 45° to 75°.

[0031] In one specific embodiment of the present invention, the length of the fixing baffle is 500-540mm, the width of the fixing baffle is 4-10mm, and the thickness of the fixing baffle is 4mm-8mm;

[0032] like Figure 5As shown, in a specific embodiment of the present invention, the end cap portion 3 includes an end cap 301 and a mechanical seal 302 and a bearing 303 fitted inside the end cap 301; the end cap 301 has a threaded hole for connection with a flange; the inner wall of the end cap 301 also has a hole for installing the bearing 303; the inner wall of the installed bearing 303 is flush with the inner wall of the mechanical seal 302 and is fixedly connected to the stirring shaft 2. A gasket for sealing is provided between the end cap portion and the flange.

[0033] The present invention also provides a method for promoting material reaction based on the above-described reactor, comprising the following steps:

[0034] 1) Connect the first inlet 101 of the cylinder 1 to the external A material supply device, connect the second inlet 102 of the cylinder 1 to the external B material supply device, and connect the outlet 103 of the cylinder 1 to the external reaction product collection device.

[0035] 2) The external A material supply device supplies A material into the reactor through the first inlet 101; the external B material supply device supplies B material into the reactor through the second inlet 102; at the same time, the stirring shaft 2 is rotated, and the fixed baffle 201 and stirring blade 202 on the stirring shaft 2 are driven to rotate by the stirring shaft.

[0036] When materials A and B come into contact with the fixed baffle 201 and the stirring blade 202, they are subjected to the force generated by the rotation of the fixed baffle 201 and the stirring blade 202, resulting in strong displacement. At the same time, the rotation of the fixed baffle 201 and the stirring blade 202 shears materials A and B, causing the components of materials A and B to slide against each other and increasing the contact surface of the components, thereby achieving the purpose of mixing.

[0037] 3) During the process of continuously feeding external materials into the cylinder 1 and stirring them, the flow trajectory of the mixture is changed by the groove group 104 on the inner wall of the cylinder 1, and the mixture is further mixed.

[0038] 4) Under the action of the stirring shaft 2 and the groove group 104, the mixture is fully reacted in the cylinder 1 and then output from the outlet 103.

[0039] In a specific embodiment of the reactor combining dynamic and static methods described in this invention for material mixing reaction testing:

[0040] 1) Turn on the power to the equipment. The motor will drive the stirring shaft to rotate at a speed of 100 rpm.

[0041] 2) A plunger pump is used to introduce 0.025 mol / L dilute sulfuric acid into the first inlet 101 at a flow rate of 1 m³ / s. 4 / h; Iodide mixture (containing 0.0909 mol / L sodium hydroxide, 0.1818 mol / L boric acid, 0.0117 mol / L potassium iodide, and 0.0023 mol / L potassium iodate) is introduced into the second inlet 102 at a flow rate of 1 m³ / h. 3 / h.

[0042] 3) After a period of time, collect the mixture at the outlet and immediately use a UV-Vis spectrophotometer to detect the absorbance of triiodine anions in the product at a wavelength of 353 nm.

[0043] 4) According to Bee-Lambert's law, calculate the concentration of triiodine anions from the absorbance and substitute it into the formula.

[0044] 2~4C=A / kb

[0045] Where C represents the concentration of triiodine anions, A represents the absorbance of the solution measured at a certain wavelength, b represents the thickness of the absorption layer (0.01 μm in this embodiment), and k represents the molar absorptivity. The value of k is determined by the absorbance of a standard solution with a known triiodine anion concentration, yielding k = 2670 μm. 2 / mol.

[0046] The concept of the discrete index is used to measure the efficiency of micro-mixing, and its expression is as follows:

[0047] Xs = Y / Y ST

[0048] Y represents the molar ratio of hydrogen ions consumed to the original hydrogen ions in the Dushman reaction. ST The Y value represents the value when the two materials are basically mixed.

[0049] The dispersion index Xs ranges from 0 to 1, with a smaller value indicating better micro-mixing performance. Ideally, perfect micro-mixing occurs when Xs is 0; when there is absolutely no micro-mixing between the two materials, it is 1. The mixing efficiency is taken as (1-Xs)×100%.

[0050] Example 2

[0051] A reactor without a stirring shaft, having the same cylindrical dimensions as the reactor of this invention but with smooth inner walls, is selected. A plunger pump is used to introduce 0.025 mol / L dilute sulfuric acid into the first inlet of this reactor at a flow rate of 1 m³ / L. 3 / h; Iodide mixture (containing 0.0909 mol / L sodium hydroxide, 0.1818 mol / L boric acid, 0.0117 mol / L potassium iodide, and 0.0023 mol / L potassium iodate) is introduced into the second inlet at a flow rate of 1 m³ / h. 3 / h.

[0052] After a period of time, the mixture was collected at the outlet and the absorbance of triiodine anions in the product was immediately measured at a wavelength of 353 nm using a UV-Vis spectrophotometer. The product was then evaluated using step 4).

[0053] Example 3

[0054] A reactor without a stirring shaft, having the same cylindrical dimensions as reactor cylinder 1 of this invention and also having grooves on its inner wall, is selected. A plunger pump is used to introduce 0.025 mol / L dilute sulfuric acid into the first inlet of this reactor at a flow rate of 1 m³ / L. 3 / h; Iodide mixture (containing 0.0909 mol / L sodium hydroxide, 0.1818 mol / L boric acid, 0.0117 mol / L potassium iodide, and 0.0023 mol / L potassium iodate) is introduced into the second inlet at a flow rate of 1 m³ / h. 3 / h.

[0055] After a period of time, the mixture was collected at the outlet and the absorbance of triiodine anions in the product was immediately measured at a wavelength of 353 nm using a UV-Vis spectrophotometer. The product was then evaluated using step 4).

[0056] Example 4

[0057] Select a reactor with the same cylindrical dimensions as reactor cylinder 1 of this invention but with smooth inner walls, and equipped with the same stirring shaft as this invention. Use a plunger pump to introduce 0.025 mol / L dilute sulfuric acid into the first inlet of the reactor at a flow rate of 1 m³ / L. 3 / h; Iodide mixture (containing 0.0909 mol / L sodium hydroxide, 0.1818 mol / L boric acid, 0.0117 mol / L potassium iodide, and 0.0023 mol / L potassium iodate) is introduced into the second inlet at a flow rate of 1 m³ / h. 3 / h.

[0058] After a period of time, the mixture was collected at the outlet, and the absorbance of triiodine anions in the product was immediately measured at a wavelength of 353 nm using a UV-Vis spectrophotometer. The results were then evaluated using step 4). The detection results of this embodiment are shown in Table 1:

[0059] Table 1

[0060]

[0061] Therefore, it can be seen that the reactor of the present invention greatly improves the mixing efficiency.

[0062] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the claims of this invention. Those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of this invention.

Claims

1. A reactor for high-viscosity substances that combines dynamic and static methods, characterized in that, It includes a cylinder (1), a stirring shaft (2), a head (3), and a flange (5); The cylinder (1) is a straight cylindrical tube with open ends. The outer wall of one end of the cylinder (1) is provided with a first inlet (101) and a second inlet (102), and the outer wall of the other end of the cylinder (1) is provided with an outlet (103). The inner wall of the cylinder (1) is provided with a groove group (104) for changing the material flow trajectory. A flange (5) is provided at both ends of the cylinder (1). Two end caps (3) are respectively connected to the flanges (5) at both ends of the cylinder (1). The end caps (3) are provided with holes for mounting the stirring shaft (2). The stirring shaft (2) is located inside the cylinder (1) and both ends of the stirring shaft (2) pass through the holes of the end caps (3). The portion of the stirring shaft located inside the cylinder (1) is provided with multiple fixing rings (203), four fixing baffles (201), and multiple stirring blades (202); the multiple fixing rings (203) are welded to the stirring shaft at equal intervals along the axial direction of the stirring shaft, and the fixing rings (203) are also welded to the fixing baffles (201) to fix the fixing baffles (201); the fixing baffles are long strip-shaped baffles, and the fixing baffles are used to stir the material inside the cylinder (1); the four fixing baffles (201) are evenly distributed circumferentially on the stirring shaft (2), and the length direction of the fixing baffles (201) is the same as the axial direction of the stirring shaft; multiple stirring blades (202) are welded at equal intervals on each fixing baffle (201); the stirring blades (202) are used to shear and stir the material inside the cylinder (1) during the rotation of the stirring shaft; The groove group (104) includes an axial groove structure consisting of multiple grooves arranged along the inner wall of the cylinder and parallel to the cylinder axis, and an annular groove structure consisting of multiple grooves arranged in a ring along the inner diameter of the cylinder. At least one set of axial groove structure and one set of annular groove structure are provided on the inner wall of the cylinder.

2. The reactor according to claim 1, characterized in that, The stirring blade (202) is flat and the flat surface of the stirring blade (202) is perpendicular to the surface of the fixed baffle (201) used for welding. There is a deflection angle between the flat surface of the stirring blade (202) and the surface perpendicular to the stirring shaft axis, and the deflection angle is 45°~75°.

3. The reactor according to claim 1, characterized in that, The head portion (3) includes a head (301) and a mechanical seal (302) and a bearing (303) fitted inside the head (301); the head (301) has a threaded hole for connecting with a flange; the inner wall of the head (301) also has a hole for installing the bearing (303); the inner wall of the installed bearing (303) is flush with the inner wall of the mechanical seal (302) and is fixedly connected to the stirring shaft (2).

4. The reactor according to claim 1, characterized in that, A gasket (4) for sealing is provided between the head portion (3) and the flange (5).

5. The reactor according to claim 1, characterized in that, The length of the cylinder is 640mm~1000mm, the inner diameter is 140~200mm, the wall thickness is 7.5mm~10mm, and the groove depth of the groove group is 2~5mm.

6. The reactor according to claim 1, characterized in that, The fixed baffle has a length of 500~540mm, a width of 4~10mm, and a thickness of 4~8mm.

7. The reactor according to claim 1, characterized in that, The stirring blades include at least 6 groups; each group of stirring blades is evenly distributed along the axial direction of the stirring shaft, and the stirring blades of each group are spaced 40mm~85mm apart; each group of stirring blades is divided into four spirally distributed blades, which are respectively set on four fixed baffles (201), and the stirring range of the stirring blades (202) accounts for 50%~90% of the inner diameter of the cylinder.

8. The reactor according to claim 7, characterized in that, A retaining ring is provided between every two mixing blades.

9. A method for promoting material reaction based on the reactor of claim 1, characterized in that, Includes the following steps: 1) Connect the first inlet (101) of the cylinder (1) to the external A material supply device, the second inlet (102) of the cylinder (1) to the external B material supply device, and connect the outlet (103) of the cylinder (1) to the external reaction product collection device. 2) The external A material supply device supplies A material to the inside of the reactor through the first inlet (101); the external B material supply device supplies B material to the inside of the reactor through the second inlet (102); at the same time, the stirring shaft (2) is rotated, and the radial baffle (201) and stirring blade (202) on the stirring shaft (2) are driven to rotate by the stirring shaft. When materials A and B come into contact with the fixed baffle (201) and the stirring blade (202), materials A and B are displaced by the force generated by the rotation of the fixed baffle (201) and the stirring blade (202); at the same time, materials A and B are sheared by the rotation of the fixed baffle (201) and the stirring blade (202), causing the components of materials A and B to slide against each other and increasing the contact surface of the components, thereby achieving the purpose of mixing. 3) During the process of continuously feeding external materials into the cylinder (1) and stirring, the flow trajectory of the mixture is changed by the groove group (104) on the inner wall of the cylinder (1), and the mixture is further mixed. 4) Under the action of the stirring shaft (2) and the groove group (104), the mixture is fully reacted in the cylinder (1) and then output from the outlet (103).

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