A kind of air blowing stirring device for reaction kettle

Abstract

The invention discloses a reactor blowing and stirring device, which is applied to the reactor and comprises a blowing structure, a stirrer and a baffle respectively arranged in the reactor; the blowing structure comprises an air inlet pipe, a circular ring-shaped jet pipe and a jet port, the jet pipe is horizontally arranged in the lower part of the reactor, a plurality of jet ports are evenly arranged on the jet pipe and face outward of the ring, the angle α between the axis of the jet port and the horizontal plane is 15-90°, the angle β between the axis and the radial direction of the jet pipe is 10-40°, and α>β. The invention adjusts the shape and position of the jet pipe, and at the same time adjusts the opening direction of the jet port and the angle on the jet pipe, so that the gas ejected from the jet port forms a bubble group similar to a circular ring, and is consistent or nearly consistent with the flow direction of the material in the reactor, which not only reduces the energy loss of gas blowing, but also the bubbles formed can further drive the material to move upward during the movement, promote the mixing and reaction of the materials, and has a reasonable structure and strong applicability.

Description

Technical Field

[0001] The invention belongs to the technical field of reaction kettles, and in particular relates to an air blowing and stirring device for a reaction kettle. Background Art

[0002] In chemical production, stirring is an important process that is widely used in material mixing, dispersion, extraction and crystallization. At present, in precipitation crystallization reactors, anchor, paddle and folding blade turbine agitators are widely used. The stirring process generates axial flow to promote the mixing and reaction of suspended materials, and protective gas will be introduced according to the reaction characteristics, which can prevent or promote the oxidation and reduction of materials and play a certain stirring role. However, the gas phase is broken and dispersed into the material under the shearing action of the agitator, which requires a large shear force and high energy consumption. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a blowing and stirring device for a reactor. By adjusting the direction of the jet port in the blowing structure and the angles between the axis of the jet port and the horizontal plane and the radial direction of the jet pipe respectively, the blown gas is made consistent or nearly consistent with the flow direction of the material during the stirring process, thereby solving the problem that the gas phase requires a large shear force in the agitator and has high energy consumption.

[0004] The technical solution adopted by the present invention is:

[0005] A blowing and stirring device for a reactor, applied to a reactor, comprising a blowing structure, a stirrer and a baffle; the blowing structure is arranged in the reactor, the stirrer is vertically suspended and arranged in the middle of the reactor, the number of the baffle is at least one, and the baffle is vertically arranged on the inner side wall of the reactor;

[0006] The blowing structure includes an air inlet pipe, an air jet pipe and an air jet port. The air jet pipe is a circular ring structure and is horizontally arranged at the inner lower part of the reactor. The air inlet pipe is connected to the air jet pipe. There are multiple air jet ports, which are evenly arranged on the air jet pipe and directed toward the outside of the ring. The angle α between the axis of the air jet port and the horizontal plane is 15 to 90°, and the angle β between the axis of the air jet port and the radial direction of the air jet pipe is 10 to 40°, and α>β.

[0007] Preferably, the distance h between the air jet pipe and the bottom of the reactor is 0.1 to 0.3 times the outer diameter d1 of the annular ring of the air jet pipe.

[0008] Preferably, the outer diameter d1 of the ring of the gas jet pipe is 0.6 to 0.8 times the inner diameter D of the reactor, and the inner diameter d2 of the gas jet pipe is 0.01 to 0.05 times the outer diameter d1 of the ring.

[0009] Preferably, the number of the air jets is 6 to 12, and the diameter d3 of the air jets is 0.2 to 2 mm.

[0010] Preferably, the blowing structure further comprises a support frame, and the air inlet pipe and the air injection pipe are arranged in the reactor via the support frame.

[0011] Preferably, the stirrer comprises a stirring shaft and a stirring paddle arranged at the lower part of the stirring shaft, the stirring paddle comprises 2 to 6 blades, and the blades are axial flow blades.

[0012] Preferably, the blade diameter D1 of the stirring paddle is 0.3 to 0.5 times the inner diameter D of the reactor, and the distance H between the center of the blade and the bottom of the reactor is 0.3 to 0.6 times the blade diameter D1.

[0013] Preferably, the blades of the stirring paddle are any one of folding blade type, propulsion type and turbine type.

[0014] Preferably, the baffle comprises a body and a support assembly, the number of the bodies is 2 to 6, a plurality of the support assemblies are vertically arranged on each of the bodies, and the plurality of the support assemblies are jointly arranged on the inner side wall of the reactor.

[0015] Preferably, the gas flow rate Qm of the blowing structure is 3 The value of / h is the volume Vm of the reactor 3 0.5 to 3 times the value.

[0016] Compared with the prior art, the present invention sets the jet pipe in a circular ring shape and sets it horizontally in the lower part of the reactor, and evenly opens jet ports on the jet pipe, and limits the direction of the jet port and the angle between the axis and the horizontal plane, as well as the angle between the axis and the radial direction of the jet pipe, so that the gas ejected from the jet port forms a bubble group similar to a circular ring, and is consistent or nearly consistent with the flow direction of the material in the reactor. This not only reduces the energy loss when the gas is blown in, but also the bubbles formed can further drive the material to move upward during the movement, enhance the axial circulation in the reactor, and promote the mixing and reaction of the materials; the present invention also strengthens the stirring effect of the materials in the reactor by combining air blowing stirring and mechanical stirring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal structure of a blowing and stirring device for a reaction kettle provided in an embodiment of the present invention;

[0018] Figure 2 It is a structural diagram of an air jet pipe and an air jet port in an air blowing and stirring device for a reaction kettle provided in an embodiment of the present invention;

[0019] Figure 3is a cross-sectional view of an air jet pipe in an air blowing and stirring device for a reaction kettle provided in an embodiment of the present invention;

[0020] Figure 4 It is a material flow diagram of a central cross section when only air blowing is performed in an air blowing and stirring device for a reaction kettle provided by an embodiment of the present invention;

[0021] Figure 5 It is a diagram of material flow in the central cross section when air blowing and stirring by a stirrer are carried out simultaneously in a reaction kettle air blowing and stirring device provided by an embodiment of the present invention.

[0022] In the figure: 1. reactor; 2. blowing structure; 21. air inlet pipe; 22. jet pipe; 23. jet outlet; 24. support frame; 3. agitator; 31. agitator shaft; 32. agitator paddle; 4. baffle; 41. body; 42. support assembly. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] The embodiment of the present invention provides a reaction kettle blowing stirring device, which is applied to a reaction kettle 1, such as Figure 1 As shown, the air blowing stirring device comprises an air blowing structure 2, an agitator 3 and a baffle 4; the air blowing structure 2 is arranged in the reactor 1 for blowing air into the reactor 1, and the agitator 3 is vertically suspended and arranged in the middle of the reactor 1, so that the air blowing stirring and the mechanical stirring work together to enhance the stirring effect; the number of the baffle 4 is at least one, and the baffle 4 is vertically arranged on the inner side wall of the reactor 1, mainly used to eliminate vortices in the stirring process and improve the stirring effect;

[0025] The blowing structure 2 includes an air inlet pipe 21, an air jet pipe 22 and an air jet port 23. The air jet pipe 22 is an annular structure and is horizontally arranged at the inner lower part of the reactor 1. The air inlet pipe 21 is connected to the air jet pipe 22, that is, the air inlet pipe 21 is used to feed air into the air jet pipe 22, and the air jet pipe 22 is used to blow gas into the reactor 1. The air jet pipe 22 is an annular structure and is horizontally arranged above the bottom of the reactor 1, so that the bubble group blown into the reactor 1 is an annular bubble group.

[0026] like Figure 2 and Figure 3As shown, there are multiple jet ports 23, which are evenly arranged on the jet pipe 22 and directed toward the outside of the ring. The angle α between the axis of the jet port 23 and the horizontal plane is 15 to 90°, and the angle β between the axis of the jet port 23 and the radial direction of the jet pipe 22 is 10 to 40°, and α>β.

[0027] In this way, a ring-shaped jet pipe 22 is horizontally installed at the inner bottom of the reactor 1, and a plurality of jet ports 23 are evenly arranged on the jet pipe 22, the jet ports 23 face the outside of the ring of the jet pipe 22, and the angle α between the axis and the horizontal plane is 15 to 90°, and the angle β between the axis and the radial direction of the jet pipe 22 is 10 to 40°, α>β; that is, by adjusting the setting position and the opening direction of the jet port 23, the direction of the gas blown into the reactor 1 by the jet pipe 22 is adjusted, so that the flow directions of the blown gas and the material are consistent or nearly consistent, so that the energy loss of the blown gas is minimized, and the upward movement of the material is further driven during the movement of the formed bubbles, thereby enhancing the axial circulation in the reactor and promoting the mixing and reaction of the materials.

[0028] That is to say, the present invention adjusts the setting position and opening direction of the air jet 23 so that the blown gas obeys the flow law of the material in the reactor, the gas moves along the material movement direction as much as possible, and the gas will further drive the material movement, promote uniform mixing of the material, and reduce reaction energy consumption.

[0029] like Figure 4 and Figure 5 As shown, in order to make the blown gas promote stirring and reduce energy consumption as much as possible, the position and direction of the jet port 23 need to be close to the flow direction of the material. Figure 4 The flow of materials when only blowing is performed is shown in the figure. Figure 4 It can be seen that the position of the jet port 23, that is, the height from the bottom of the kettle, has a greater influence on the stirring, that is, the set height of the jet pipe 22 has a greater influence on the energy loss during stirring. Therefore, in order to promote stirring, the distance h between the jet pipe 22 and the bottom of the reactor 1 is 0.1 to 0.3 times the outer diameter d1 of the ring of the jet pipe 22 in the annular structure, that is, the jet pipe 22 is surrounded by a circular ring structure, and d1 is the outer diameter of the ring in the circular ring structure surrounded by the jet pipe 22.

[0030] In order to ensure the stirring effect while avoiding the excessive occupation of the volume of the reactor 1 by the blowing structure 2, the outer diameter d1 of the ring of the jet pipe 22 is 0.6 to 0.8 times the inner diameter D of the reactor 1, and the inner diameter d2 of the jet pipe 22 is 0.01 to 0.05 times the outer diameter d1 of the ring. d2 is the inner diameter of the tubular structure of the jet pipe 22 itself.

[0031] In this way, it is possible to ensure that air blowing stirring and mechanical stirring are carried out simultaneously to ensure the stirring effect, and the air blowing structure 2 avoids occupying a large volume of the reactor 1, thereby ensuring the capacity of the material in the reactor 1.

[0032] In order to optimize the stirring effect of air blowing stirring, the number of the air jets 23 is 6 to 12, and the diameter d3 of the air jets 23 is 0.2 to 2 mm.

[0033] like Figure 1 As shown, the blowing structure 2 further includes a support frame 24 , and the air inlet pipe 21 and the air injection pipe 22 are arranged in the reactor 1 through the support frame 24 .

[0034] In this way, the support frame 24 is arranged on the inner wall of the reactor 1, and the air inlet pipe 21 and the jet pipe 22 are connected to the support frame 24. The external gas delivery device delivers gas into the air inlet pipe 21, and the gas enters the jet pipe 22 through the air inlet pipe 21, and then is sprayed into the reactor 1 through the jet port 23.

[0035] like Figure 1 As shown, the stirrer 3 includes a stirring shaft 31 and a stirring paddle 32 disposed at the lower part of the stirring shaft 31, and the stirring paddle 32 includes 2 to 6 blades, and the blades are axial flow blades. Specifically, the blades of the stirring paddle 32 are any one of folding blade type, propulsion type, and turbine type.

[0036] In this way, the liquid discharge direction of the blades of the stirring paddle 32 is parallel to the stirring shaft 31 .

[0037] In order to reduce energy consumption during the stirring process, the blade diameter D1 of the stirring paddle 32 is 0.3 to 0.5 times the inner diameter D of the reactor 1, and the distance H between the blade center and the bottom of the reactor 1 is 0.3 to 0.6 times the blade diameter D1.

[0038] In order to prevent the material from forming a vortex during the stirring process, the baffle 4 includes a main body 41 and a support assembly 42. The number of the main bodies 41 is 2 to 6. A plurality of the support assemblies 42 are vertically arranged on each of the main bodies 41. The plurality of the support assemblies 42 are jointly arranged on the inner wall of the reactor 1.

[0039] The gas flow rate Qm of the blowing structure 2 3 The value of / h is the volume Vm of the reactor 1 3 0.5 to 3 times the value.

[0040] In this way, the blowing gas will form a bubble group similar to a ring, and the bubble group will further drive the material to move upward when moving, thereby enhancing the axial circulation in the reactor 1 and promoting the mixing and reaction of the materials.

[0041] Working process: When the air blowing stirring device is used, by starting the stirrer 3, the stirring shaft 31 drives the stirring paddle 32 to rotate, thereby stirring the material in the reactor 1. At the same time, air is blown into the air inlet pipe 21, and the gas enters the jet pipe 22 through the air inlet pipe 21 and is ejected from the jet port 23. The ejected gas forms a bubble group similar to a ring shape, and is consistent or nearly consistent with the flow direction of the material in the reactor 1, which not only enhances the stirring effect, but also reduces the energy loss during blowing.

[0042] When the present invention is in use, the jet pipe is set to be annular and horizontally set at the inner lower part of the reactor, and jet ports are evenly opened on the jet pipe, and the direction of the jet port, the angle between the axis of the jet port and the horizontal plane, and the angle between the axis of the jet port and the radial direction of the jet pipe are limited, so that the gas ejected from the jet port forms a bubble group similar to annular, and is consistent or nearly consistent with the flow direction of the material in the reactor, thereby reducing the energy loss when the gas is blown in, and the formed bubbles can further drive the material to move upward during the movement, thereby enhancing the axial circulation in the reactor and promoting the mixing and reaction of the materials; the present invention also strengthens the stirring effect of the material in the reactor by combining air blowing stirring and mechanical stirring; the present invention also effectively reduces energy consumption by limiting the set height of the jet pipe and the set position of the stirring paddle.

[0043] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A reaction kettle air blowing and stirring device, applied to a reaction kettle (1), characterized in that: The invention comprises an air blowing structure (2), an agitator (3) and a baffle (4); the air blowing structure (2) is arranged in a reaction kettle (1); the agitator (3) is vertically suspended and arranged in the middle of the reaction kettle (1); the number of the baffle (4) is at least one, and the baffle (4) is vertically arranged on the inner wall of the reaction kettle (1); The blowing structure (2) comprises an air inlet pipe (21), an air jet pipe (22) and an air jet port (23); the air jet pipe (22) is a circular ring structure and is horizontally arranged at the inner lower part of the reaction kettle (1); the air inlet pipe (21) is connected to the air jet pipe (22); there are a plurality of air jet ports (23); the plurality of air jet ports (23) are evenly arranged on the air jet pipe (22) and are oriented toward the outside of the ring; an angle α between an axis of the air jet port (23) and a horizontal plane is 15 to 90°; an angle β between an axis of the air jet port (23) and a radial direction of the air jet pipe (22) is 10 to 40°, and α>β; The distance h between the jet pipe (22) and the bottom of the reactor (1) is 0.1 to 0.3 times the outer diameter d1 of the ring of the jet pipe (22) with an annular structure; The outer diameter d1 of the ring of the jet pipe (22) is 0.6 to 0.8 times the inner diameter D of the reactor (1), and the inner diameter d2 of the jet pipe (22) is 0.01 to 0.05 times the outer diameter d1 of the ring; The number of the air jets (23) is 6 to 12, and the diameter d3 of the air jets (23) is 0.2 to 2 mm.

2. The air blowing and stirring device for a reaction kettle according to claim 1, characterized in that: The blowing structure (2) further comprises a support frame (24), and the air inlet pipe (21) and the air injection pipe (22) are arranged in the reaction kettle (1) via the support frame (24).

3. The air blowing and stirring device for a reaction kettle according to claim 1, characterized in that: The stirrer (3) comprises a stirring shaft (31) and a stirring paddle (32) arranged at the lower part of the stirring shaft (31); the stirring paddle (32) comprises 2 to 6 blades, and the blades are axial flow blades.

4. The air blowing and stirring device for a reaction kettle according to claim 3, characterized in that: The blade diameter D1 of the stirring paddle (32) is 0.3 to 0.5 times the inner diameter D of the reactor (1), and the distance H between the center of the blade and the bottom of the reactor (1) is 0.3 to 0.6 times the blade diameter D1.

5. The air blowing and stirring device for a reaction kettle according to claim 4, characterized in that: The blades of the stirring paddle (32) are any one of a folding blade type, a propulsion type, and a turbine type.

6. The air blowing and stirring device for a reaction kettle according to claim 1, characterized in that: The baffle (4) comprises a body (41) and a support assembly (42), the number of the bodies (41) is 2 to 6, a plurality of the support assemblies (42) are vertically arranged on each body (41), and the plurality of the support assemblies (42) are collectively arranged on the inner side wall of the reaction kettle (1).

7. A blowing and stirring device for a reaction kettle according to any one of claims 1 to 6, characterized in that: The gas flow rate Qm of the blowing structure (2) 3 The value of / h is the volume Vm of the reactor (1) 3 0.5 to 3 times the value.

Images