Stirring device and reaction device with stirring device and filtering mechanism

Abstract

The utility model discloses a stirring device and a reaction device with the stirring device and a filtering mechanism. Belongs to the field of chemical production devices. The stirring device is arranged in the reaction container, the stirring device comprises a stirring mechanism and a filtering mechanism, and the stirring mechanism comprises a stirring rod and stirring blades; the stirring rod is of a hollow tubular structure, and the stirring rod and the reaction container are coaxially arranged; a discharge port is formed in the upper end of the stirring rod, the upper end of the stirring rod upwards extends out of the top of the reaction container, the lower end of the stirring rod is a closed end, and stirring blades are arranged at the lower end of the stirring rod; the filtering mechanism comprises a filtering net and an annular wall structure, the filtering net is of a closed curved surface structure formed by surrounding the stirring rod, and filtering holes are formed in the filtering net. In the operation process of the stirring device, due to the acting force of the paddles, liquid is in tangential contact with the surface of the filtering mechanism in the rotating process, so that solid particles deposited on the surface are continuously scoured by shearing force and fall off, and therefore, the self-cleaning function is realized, and an additional backflushing system does not need to be mounted.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production equipment, and relates to a stirring device and a reaction device with a stirring device and a filtration mechanism. Background Technology

[0002] Agitators are a widely used type of mechanical equipment, mainly used to agitate materials. To ensure thorough mixing, patent CN213557030U installs multiple sets of agitator blades on the agitator inside the reactor, promoting full and uniform fusion of materials, accelerating the reaction rate, and increasing production speed.

[0003] Patent CN211706062U discloses a catalyst filter for the hydrogenation refining process of caprolactam. This invention uses a barrel-shaped filter screen for separation, with the catalyst accumulating in the screen and able to be poured out through the round holes for easy collection and recovery. The drawback of this device is that it collects the catalyst in the filter barrel for disassembly and reuse, rather than retaining the catalyst within the reaction vessel for direct reuse, making the operation relatively cumbersome. Furthermore, the filter screen needs to be cleaned by rotating a brush during the reaction process.

[0004] Patent CN216727218U describes a stirring device with a filtration mechanism for the preparation of sodium gluconate. By incorporating a rotatable filtration channel, it filters particulate matter from the material or solution during stirring. The particulate matter is trapped in the filtration channel, while the material is ejected into a container, preventing particulate impurities from affecting the stirring quality. While this device can separate impurities from the material through its filtration pipes, and filtration and stirring occur simultaneously, the presence of impurities in the filtration pipes necessitates disassembly and cleaning, making the process cumbersome.

[0005] Existing stirring devices can thoroughly stir and mix reactants, but inventions of devices that combine stirring and filtration functions are relatively rare. How to efficiently separate the catalyst and reaction liquid within the reaction vessel, allowing the catalyst to be retained and recycled within the vessel, remains an urgent problem to be solved. Utility Model Content

[0006] The purpose of this utility model is to provide a stirring device, which is installed inside a reaction vessel and includes a stirring mechanism and a filtration mechanism.

[0007] The stirring mechanism includes a stirring rod and stirring blades; the stirring rod is a hollow tubular structure and is coaxially arranged with the reaction vessel; the upper end of the stirring rod is provided with a discharge port, the upper end of the stirring rod extends upward beyond the top of the reaction vessel, the lower end of the stirring rod is a closed end, and the lower end of the stirring rod is provided with stirring blades;

[0008] The filtration mechanism includes a filter screen and an annular wall structure. The filter screen is a closed curved surface structure formed around the stirring rod, and filter holes are provided on the filter screen. The annular wall structure is a rod wall structure with through holes on the stirring rod surrounded by the filter screen. The filtration mechanism has a cylindrical structure, which has the advantages of large filtration area, large throughput, and good filtration effect. The stirring device provided by this utility model has both stirring and filtering functions, realizing continuous and efficient separation of products and catalysts in the reactor, with high catalyst utilization and high reaction efficiency.

[0009] This utility model also provides a reaction device with a stirring device and a filtering mechanism, including a reaction vessel, a feed inlet, and a discharge outlet. The reaction device also includes a stirring device (stirring device and filtering mechanism).

[0010] 1. Stirring device

[0011] The stirring device includes a stirring rod and stirring blades;

[0012] The stirring rod is a hollow tubular structure and is coaxially arranged with the reaction vessel.

[0013] The upper end of the stirring rod is an open end, and the upper end of the stirring rod extends upward out of the top of the reaction vessel and is provided with a discharge port (preferably forming a single discharge port). The filtration mechanism is configured to form the only inlet for the fluid contained in the inner cavity to enter the tubular channel through the through hole.

[0014] The lower end of the stirring rod is a closed end, which is a conical inclined surface, and the lower end of the stirring rod is provided with stirring blades;

[0015] The rotational speed of the stirring blade is 20-600 rpm, preferably 400-600 rpm.

[0016] 2. Filtration mechanism

[0017] The filtration mechanism includes a filter screen and an annular wall structure. The filter screen is a closed curved surface structure formed around the stirring rod, and filter holes are provided on the filter screen.

[0018] The top and bottom surfaces of the closed curved surface structure can be either planes or curved surfaces. The curved surface formed around the stirring rod and the top and bottom surfaces together constitute a filter screen structure.

[0019] The filtration mechanism is submerged below the surface of the fluid contained in the inner cavity;

[0020] The fluid is a solid-liquid mixture;

[0021] The solid-liquid mixture comprises solid particles with an average size of 1-1000 μm, preferably 20-300 μm;

[0022] The content of the solid particles in the solid-liquid mixture is 3-40 wt%;

[0023] The annular wall structure is a rod wall structure with through holes on a stirring rod surrounded by a filter screen;

[0024] The annular wall structure is one or more parts of the vertical portion of the stirring rod;

[0025] The annular wall structure is provided with through holes, which are inside the filter screen;

[0026] The total length of the annular wall structure is 20% to 80% of the length along the central axis of the stirring rod; the length of the annular wall structure is the projection length of the closed curved surface structure onto the stirring rod. Here, "the total length of the annular wall structure" means that if the stirring rod has one segment of annular wall structure, the total length is the length of that segment of annular wall structure; if the stirring rod has multiple segments of annular wall structure, the total length is the sum of the lengths of these multiple segments of annular wall structure.

[0027] Each segment of the annular wall structure is individually provided with one or more of the aforementioned through holes.

[0028] According to an embodiment of the present invention, preferably, the filter screen has a cylindrical structure;

[0029] Preferably, the diameter of the filter pores in the filter screen is 0.5-200 μm;

[0030] Preferably, the diameter of the filter screen is 110% to 1000% of the inner diameter of the stirring rod; more preferably, it is 300% to 600%.

[0031] Preferably, the annular wall structure has 1-100 through holes, more preferably 3-30, and the diameter of the through holes is 1-50 mm;

[0032] Preferably, the stirring rod is provided with 1 to 20 filter screens, more preferably 2 to 10; the stirring rod is provided with 1 to 20 stirring blades, more preferably 2 to 10.

[0033] Preferably, the stirring rod is provided with stirring blades and filter screen alternately from bottom to top;

[0034] Preferably, the reaction apparatus further includes an air inlet and an air outlet; the feed inlet, air inlet, discharge outlet, and air outlet are located at the top of the reaction vessel; more preferably, the lower part or bottom of the reaction apparatus also includes one or more discharge outlets different from the discharge outlet.

[0035] Preferably, the material processed in the reaction vessel of the reaction apparatus is a fluid material;

[0036] The fluid material is a solid-liquid mixture; the solid-liquid mixture contains solid particles with an average size of 1-1000 μm; the content of the solid particles in the solid-liquid mixture is 3-40 wt%.

[0037] The filtration mechanism of the stirring device is submerged below the liquid surface of the fluid material in the reaction vessel when in operation. Beneficial effects

[0038] To overcome the shortcomings of existing technologies, this invention provides a stirring device and a reaction apparatus incorporating both a stirring device and a filtration mechanism, enabling continuous separation of catalyst and product. A cylindrical filter screen filters catalyst particles, trapping the catalyst in the container. The product passes through the filter screen and then exits through the through-holes on the stirring rod into the hollow channel, resulting in high separation efficiency. Furthermore, during operation, the stirring device of this invention utilizes the force of the impeller blades to cause the liquid to make tangential contact with the surface of the filtration mechanism during rotation. This continuously washes away solid particles deposited on the surface, achieving a self-cleaning function and eliminating the need for an additional backflushing system. The reaction can run continuously for extended periods, maintaining high and constant filtration efficiency. The filter screen remains unclogged even after prolonged operation, requiring no cleaning. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of a reaction apparatus with a stirring device and a filtration mechanism provided by the present invention.

[0040] Figure 2 A schematic diagram of a reaction device (with three through holes and two blades) with a stirring device and a filtering mechanism provided for this utility model.

[0041] Figure 3 A schematic diagram of a reaction device (with three through holes and three blades) with a stirring device and a filtering mechanism provided for this utility model.

[0042] Explanation of markings in the diagram:

[0043] 1 is the reaction vessel.

[0044] 2 represents the stirring blade.

[0045] 3 is the stirring rod.

[0046] 4-1 is a ring-shaped wall

[0047] 4-2 is a through hole on the annular wall.

[0048] 5-1 is the filtration mechanism.

[0049] 5-2 is the filter screen.

[0050] 6 is the feed inlet.

[0051] 7 is the air intake.

[0052] 8 is the discharge port.

[0053] 9 is the air outlet. Detailed Implementation

[0054] Example

[0055] Combination Figure 1 The structure and working principle of a reaction device with a stirring device and a filtration mechanism provided by this utility model are described.

[0056] The purpose of this invention is to provide a reaction apparatus with a stirring device and a filtration mechanism, including a reaction vessel 1, a feed inlet 6, and a discharge outlet 8. The reaction apparatus further includes a stirring device and a filtration mechanism.

[0057] The stirring device includes a stirring rod 3 and a stirring blade 2; the stirring rod 3 is a hollow tubular structure, the stirring rod is coaxially arranged with the reaction vessel 1, the upper end of the stirring rod 3 is provided with a discharge port 8, the upper end of the stirring rod 3 extends upward out of the top of the reaction vessel 1, the lower end of the stirring rod 3 is a closed end, and the lower end of the stirring rod 3 is provided with a stirring blade 2.

[0058] The filtration mechanism 5 includes a filter screen 5-1 and an annular wall structure 4-1. The filter screen 5-1 is a closed curved surface structure formed around the stirring rod, and the filter screen 5-1 is provided with filter holes. The annular wall structure 4-1 is a rod wall structure with through holes on the stirring rod 3 surrounded by the filter screen.

[0059] The reaction apparatus further includes an air inlet 7 and an air outlet 9; the feed inlet 6, air inlet 7, feed outlet 8, and air outlet 9 are located on the top of the reaction vessel.

[0060] The reaction device is arranged alternately from bottom to top with two stirring blades 2 and two filter screens 5-1. The filter screen 5-1 has a cylindrical structure, and the average diameter of the filter holes on the filter screen is 40 μm. The diameter of the filter screen 5-1 is 300% of the inner wall diameter of the stirring rod. Each annular wall structure of the filter screen 5-1 has a through hole 4-2, and the diameter of each through hole 4-2 is 50 mm. The total length of the two annular wall structures 4-1 along the central axis of the stirring rod 3 is 30% of the length of the stirring rod 3.

[0061] The hydrogenation reaction was carried out in a reaction apparatus 1 equipped with a stirring device and a filtration mechanism. The reaction apparatus 1 contained 300 L of a solid-liquid mixture as reactants, wherein the content of solid catalyst particles was 20 wt%, and the average size of the catalyst particles was 60 μm. Liquid reactants were continuously fed into the reactor through inlet 6 at a flow rate of 37.5 L / h, and liquid reaction products were continuously discharged from the reaction apparatus 1 through outlet 8 at a flow rate of 37.5 L / h. The hydrogenation reaction was carried out continuously for 8 h, with the stirring device rotating at 300 rpm. After the reaction, the filtration efficiency of the catalyst particles was tested to be approximately 88%, and the filter screen was not clogged.

[0062] Example

[0063] Combination Figure 2 The structure and working principle of a reaction device with a stirring device and a filtration mechanism provided by this utility model are described.

[0064] The purpose of this invention is to provide a reaction apparatus with a stirring device and a filtration mechanism, comprising a reaction vessel 1, an inlet 6, and an outlet 8. The invention is characterized in that the reaction apparatus further includes a stirring device and a filtration mechanism.

[0065] The stirring device includes a stirring rod 3 and a stirring blade 2; the stirring rod 3 is a hollow tubular structure, the stirring rod is coaxially arranged with the reaction vessel 1, the upper end of the stirring rod 3 is provided with a discharge port 8, the upper end of the stirring rod 3 extends upward out of the top of the reaction vessel 1, the lower end of the stirring rod 3 is a closed end, and the lower end of the stirring rod 3 is provided with a stirring blade 2.

[0066] The filtration mechanism 5 includes a filter screen 5-1 and an annular wall structure 4-1. The filter screen 5-1 is a closed curved surface structure formed around the stirring rod, and the filter screen 5-1 is provided with filter holes. The annular wall structure 4-1 is a rod wall structure with through holes on the stirring rod 3 surrounded by the filter screen.

[0067] The reaction apparatus further includes an air inlet 7 and an air outlet 9; the feed inlet 6, air inlet 7, feed outlet 8, and air outlet 9 are located on the top of the reaction vessel.

[0068] The reaction device is arranged alternately from bottom to top with two stirring blades 2 and two filter screens 5-1. The filter screen 5-1 has a cylindrical structure, and the average diameter of the filter holes on the filter screen is 40 μm. The diameter of the filter screen 5-1 is 400% of the inner wall diameter of the stirring rod. The annular wall structure of the filter screen 5-1 is provided with through holes 4-2 (two on the upper annular wall and one on the lower annular wall), and the diameter of each through hole 4-2 is 20 mm. The total length of the two annular wall structures 4-1 along the central axis of the stirring rod 3 is 30% of the length of the stirring rod 3.

[0069] The hydrogenation reaction was carried out in a reaction apparatus 1 equipped with a stirring device and a filtration mechanism. The reaction apparatus 1 contained 300 L of a solid-liquid mixture as reactants, wherein the content of solid catalyst particles was 20 wt%, and the average size of the catalyst particles was 60 μm. Liquid reactants were continuously fed into the reactor through inlet 6 at a flow rate of 50 L / h, and liquid reaction products were continuously discharged from the reaction apparatus 1 through outlet 8 at a flow rate of 50 L / h. The hydrogenation reaction was carried out continuously for 6 h, with the stirring device rotating at 400 rpm. After the reaction, the filtration efficiency of the catalyst particles was tested to be approximately 90%, and the filter screen was not clogged.

[0070] Example

[0071] Combination Figure 3 The structure and working principle of a reaction device with a stirring device and a filtration mechanism provided by this utility model are described.

[0072] The purpose of this invention is to provide a reaction apparatus with a stirring device and a filtration mechanism, comprising a reaction vessel 1, an inlet 6, and an outlet 8. The invention is characterized in that the reaction apparatus further includes a stirring device and a filtration mechanism.

[0073] The stirring device includes a stirring rod 3 and a stirring blade 2; the stirring rod 3 is a hollow tubular structure, and the stirring rod is coaxially arranged with the reaction vessel 1. The upper end of the stirring rod 3 is provided with a discharge port 8, which extends upward out of the top of the reaction vessel 1. The lower end of the stirring rod 3 is a closed end, and a stirring blade 2 is provided thereon.

[0074] The filtration mechanism 5 includes a filter screen and an annular wall structure 4-1. The filter screen is a cylindrical structure formed around the stirring rod, and the filter screen is provided with filter holes. The filter screen is coaxially arranged with the reaction vessel 1. The annular wall structure 4-1 is a rod wall structure with through holes on the stirring rod surrounded by the filter screen.

[0075] The reaction apparatus also includes an air inlet and an air outlet; the feed inlet 6, air inlet 7, discharge outlet 8, and air outlet 9 are located on the top of the reaction vessel.

[0076] The reaction device is arranged alternately from bottom to top with three stirring blades 2 and three filter screens 5-1. The filter screen 5-1 has a cylindrical structure, and the average diameter of the filter holes on the filter screen is 60 μm. The diameter of the filter screen 5-1 is 400% of the inner wall diameter of the stirring rod. Each annular wall structure of the filter screen 5-1 has a through hole 4-2, and the diameter of each through hole 4-2 is 20 mm. The total length of the two annular wall structures 4-1 along the central axis of the stirring rod 3 is 40% of the length of the stirring rod 3.

[0077] The hydrogenation reaction was carried out in a reaction apparatus 1 equipped with a stirring device and a filtration mechanism. The reaction apparatus 1 contained 300 L of a solid-liquid mixture as reactants, wherein the content of solid catalyst particles was 20 wt%, and the average size of the catalyst particles was 60 μm. Liquid reactants were continuously fed into the reactor through inlet 6 at a flow rate of 55 L / h, and liquid reaction products were continuously discharged from the reaction apparatus 1 through outlet 8 at a flow rate of 55 L / h. The hydrogenation reaction was carried out continuously for 5.5 h, with the stirring device rotating at 500 rpm. After the reaction, the filtration efficiency of the catalyst particles was tested to be approximately 92%, and the filter screen was not clogged.

Claims

1. A stirring device, characterized in that, The stirring device is installed inside the reaction vessel, and the stirring device includes a stirring mechanism and a filtration mechanism. The stirring mechanism includes a stirring rod and stirring blades; the stirring rod is a hollow tubular structure and is coaxially arranged with the reaction vessel; the upper end of the stirring rod is provided with a discharge port, the upper end of the stirring rod extends upward beyond the top of the reaction vessel, the lower end of the stirring rod is a closed end, and the lower end of the stirring rod is provided with stirring blades; The filtration mechanism includes a filter screen and an annular wall structure. The filter screen is a closed curved surface structure formed around the stirring rod, and filter holes are provided on the filter screen. The annular wall structure is a rod wall structure with through holes on the stirring rod surrounded by the filter screen.

2. The stirring device as described in claim 1, characterized in that, The total length of the annular wall structure is 20% to 80% of the length along the central axis of the stirring rod; each segment of the annular wall structure is provided with one or more through holes.

3. The stirring device as described in claim 1, characterized in that, The filter screen has a cylindrical structure; the diameter of the filter pores is 0.5-200μm.

4. The stirring device as described in claim 3, characterized in that, The diameter of the filter screen is 110% to 1000% of the inner diameter of the stirring rod.

5. The stirring device as described in claim 1, characterized in that, The annular wall structure has 1-100 through holes, and the diameter of the through holes is 1-50mm.

6. The stirring device as described in claim 1, characterized in that, The stirring rod is equipped with 1 to 20 filter screens; the stirring rod is equipped with 1 to 20 stirring blades.

7. The stirring device as described in claim 6, characterized in that, The stirring rod is alternately equipped with stirring blades and filter screens from bottom to top.

8. A reaction apparatus with a stirring device and a filtering mechanism, characterized in that, The reaction apparatus includes the stirring device as described in any one of claims 1-7, and further includes a reaction vessel, an air inlet, an air outlet, and a feed inlet; the feed inlet, air inlet, feed outlet, and air outlet are disposed on the top of the reaction vessel.

9. The reaction apparatus as described in claim 8, characterized in that, The bottom of the reaction device also includes one or more discharge ports that are different from the discharge port.

10. The reaction apparatus as described in claim 8, characterized in that, The material processed in the reaction vessel of the reaction device is a fluid material; The fluid material is a solid-liquid mixture; the solid-liquid mixture contains solid particles with an average size of 1-1000 μm; the content of the solid particles in the solid-liquid mixture is 3-40 wt%. The filtration mechanism of the stirring device is submerged below the liquid surface of the fluid material in the reaction vessel when in operation.

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