Gas distributor for reaction kettle and reaction kettle

Abstract

The utility model discloses a gas distributor for a reaction kettle and the reaction kettle. The gas distributor comprises a gas inlet main pipe and a plurality of sub-ring pipes, the central axes of the plurality of sub-ring pipes coincide, and the ring-shaped outer diameters of the sub-ring pipes are different; the sub-ring pipes are arranged in a layered mode, and the lower the sub-ring pipes are, the smaller the annular outer diameter of the sub-ring pipes is. Air holes are formed in the sub-ring pipes; the downward direction in the vertical direction is a first air outlet direction; on a vertical section passing through the central axis, a connecting line between pipe cores of the sub-ring pipes is a contour line of the gas distributor, and the tangential direction of the contour line where the pipe cores of the sub-ring pipes are located and the direction towards one side far away from the central axis are a second gas outlet direction; the air outlet direction of the air holes is between the first air outlet direction and the second air outlet direction. The reaction kettle comprises a gas distributor. The gas distributor is provided with the gas holes in different gas outlet directions, so that the gas distributor can better distribute gas, the reaction kettle provided with the gas distributor can improve the gas content, and the reaction kettle has better reaction efficiency and more sufficient reaction degree.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production and processing equipment, in particular to a gas distributor for a reactor and the reactor. Background Art

[0002] Liquids with high viscosity as the main feature, especially microbial polysaccharides, polymers and other substances, can bring many useful values ​​to human beings. The products formed by these high-viscosity liquid substances are widely used in the petroleum, construction, food, textile, medicine and other industries. In the production process, the design of agitators and distributors is very important due to the high viscosity of high-viscosity fluids.

[0003] Existing equipment mainly uses a gas-liquid reactor with a ventilation device to produce high-viscosity liquid substances. The traditional ventilation device cannot enable the gas to reach the bottom of the reactor adaptively, resulting in a low overall gas content in the lower head of the reactor. After stirring with the agitator, there is still a large area in the reactor with almost no gas and the flow of high-viscosity liquid is poor, resulting in low overall reaction efficiency and insufficient reaction. Utility Model Content

[0004] Aiming at the above problems, the utility model provides a gas distributor for a reactor and a reactor.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The present application provides a gas distributor for a reactor, comprising a gas inlet main pipe and a plurality of sub-ring pipes, wherein the gas inlet main pipe has a gas inlet port;

[0007] The central axes of the plurality of sub-annular tubes coincide, and the annular outer diameters of the sub-annular tubes are different;

[0008] The sub-annular tubes are arranged in layers, and the lower they are, the smaller the annular outer diameter of the sub-annular tubes is; the layered arrangement here means that the horizontal planes where the centers of the sub-annular tubes are located do not overlap;

[0009] Each sub-ring tube is provided with an air hole;

[0010] The vertical downward direction is the first air outlet direction;

[0011] On the vertical section passing through the central axis, the line connecting the centers of the sub-annular tubes is the contour line of the gas distributor, where the contour line is a fitted curve, and the tangent direction of the contour line where the centers of the sub-annular tubes are located and the direction away from the central axis is the second gas outlet direction;

[0012] The air outlet direction of the air hole is between the first air outlet direction and the second air outlet direction, and includes the first air outlet direction and the second air outlet direction.

[0013] Each sub-ring tube can be provided with air holes with gas outlet directions between the first gas outlet direction and the second gas outlet direction, so that the gas distributor can better distribute the gas. The reactor equipped with the gas distributor can also increase the gas content, have better reaction efficiency and a more complete reaction degree.

[0014] Furthermore, from the lowermost sub-annular tube to the uppermost sub-annular tube, the outlet directions of the air holes on each sub-annular tube are parallel, or the outlet directions of the air holes on each sub-annular tube change along an arc from a first outlet direction to a second outlet direction.

[0015] The air outlet directions of the air holes are parallel or change along the arc from the first air outlet direction to the second air outlet direction, which can effectively prevent the air from hitting the adjacent tube wall or prevent the air outlet directions of the air holes on each layer of sub-annular tube from crossing and causing air flow turbulence.

[0016] Furthermore, at least one of the gas holes of the lowermost sub-ring tube has a first gas outlet direction, that is, when the gas distributor provided by the present application is used in a reactor, at least one of the sub-ring tubes at the bottom of the reactor sprays gas toward the lower head of the reactor in a vertical direction.

[0017] Furthermore, the air intake main pipes include at least two, each of which is arranged obliquely along the height direction of each sub-annular pipe, and each of which is evenly spaced along the circumference of the sub-annular pipe.

[0018] In actual use, the number of the air intake main pipes is preferably two. In the vertical section passing through the central axis, the two air intake main pipes are arranged on opposite sides of the central axis, and the two air intake main pipes intake air symmetrically through two air inlets respectively.

[0019] Compared with a gas distributor designed with a single air intake main pipe, the present application provides two symmetrical air intake main pipes, which can make the air output more uniform.

[0020] Furthermore, a check valve is installed on the air intake main pipe, and the check valve is arranged between the air intake port and the uppermost sub-annular pipe.

[0021] A check valve is installed on the air inlet main pipe to prevent liquid backflow after ventilation is stopped during intermittent ventilation.

[0022] Furthermore, the gas distributor is made of metal or ceramic.

[0023] For conventional reactant stirring, a metal gas distributor can be used. For stirring reactants that require corrosion protection, a ceramic gas distributor can be used.

[0024] In actual use, the number, diameter and pore size of the sub-ring tubes of the gas distributor should all be sufficient for normal gas discharge from the small holes, preferably with a relatively uniform gas discharge rate. Under the condition of being able to discharge gas normally, the pore size can be made as small as possible to facilitate gas-liquid reaction.

[0025] The present application also provides a reaction kettle, comprising a kettle body and a gas distributor arranged at the bottom of the kettle body, wherein the gas distributor is the above-mentioned gas distributor for a reaction kettle.

[0026] The reactor provided in the present application is suitable for fermentation tanks and aerated polymer reactions.

[0027] Furthermore, the contour line of the gas distributor is adapted to the bottom wall of the kettle body;

[0028] The bottom wall inside the kettle body mentioned here refers to the bottom wall contour line on the vertical section of the kettle body arranged coaxially with the gas distributor and coincident with the vertical section of the gas distributor passing through the central axis.

[0029] The injection distance of the gas distributor in the material through the air holes is h1, and the distance from the bottom of the gas distributor to the bottom wall of the kettle body is h2, and h2 is between 1.1h1 and 1.3h1.

[0030] Setting a spacing distance between the gas distributor and the bottom wall of the kettle body can prevent the two from being too close and causing gas erosion on the bottom of the kettle.

[0031] Furthermore, the reactor further comprises a stirrer, the stirrer is coaxially arranged with the reactor body, and a stirring end of the stirrer is arranged at the bottom of the reactor body;

[0032] The gas distributor is coaxially arranged with the stirrer and is arranged between the stirring end of the stirrer and the bottom wall of the kettle body.

[0033] Furthermore, a feed inlet and a discharge inlet are formed on the kettle body, and the feed inlet and the discharge inlet are respectively arranged at the top and the bottom of the kettle body. The material enters from the feed inlet at the top of the kettle body and flows out from the discharge inlet at the bottom of the kettle body.

[0034] Furthermore, the gas outlet direction of the air hole on the sub-annular tube whose radial dimension is smaller than the outer diameter of the stirring end is the first gas outlet direction;

[0035] The gas outlet direction of the air holes on the sub-annular tube whose radial size is greater than or equal to the outer diameter of the stirring end is between the first gas outlet direction and the second gas outlet direction.

[0036] The stirring effect directly below the stirring end is weak, the bubbles float up quickly, and it is difficult to reach the bottom of the kettle. Providing vertical downward air holes on the sub-ring tube whose radial size is smaller than the outer diameter of the stirring end can increase the amount of gas reaching the bottom of the kettle.

[0037] Furthermore, the sub-annular tubes include 4 to 8, and the air outlet direction of the air hole of at least one of the lowermost sub-annular tubes is the first air outlet direction;

[0038] The gas outlet direction of the air hole of at least one uppermost sub-ring tube is the second gas outlet direction.

[0039] The outer diameter of the lowermost sub-ring pipe is determined according to the discharge requirements at the bottom of the reactor and whether there is a bottom bearing. When there is a bottom bearing, the innermost ring pipe diameter of the distributor needs to be able to avoid the bottom bearing.

[0040] The beneficial effects of the utility model are:

[0041] (1) Each sub-ring tube can be provided with a gas hole with a gas outlet direction between the first gas outlet direction and the second gas outlet direction, so that the gas distributor can better distribute the gas. The reactor provided with the gas distributor can also improve the gas content, have a better reaction efficiency, and have a more sufficient reaction degree.

[0042] (2) According to the outer diameter of the stirring end of the reactor agitator, the outlet direction of the gas holes in the gas distributor is set in a targeted manner, which can further enhance the retention of gas at the bottom of the reactor, further improve the flow of high-viscosity liquid at the bottom of the reactor when the distributor is discharged, and further improve the reaction efficiency and the degree of reaction sufficiency.

[0043] (3) A check valve is installed on the air inlet main pipe to prevent liquid backflow after ventilation is stopped during intermittent ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the main structure of the gas distributor of the utility model embodiment;

[0045] Figure 2 This is a schematic diagram of the top view of the gas distributor of the utility model embodiment;

[0046] Figure 3 This is a schematic diagram of the main structure of the reactor in the embodiment of the utility model;

[0047] Figure 4 yes Figure 3 A is a magnified schematic diagram of the structure.

[0048] The reference numerals in the figures are:

[0049] 10. Gas distributor; 110. Air inlet main pipe; 111. Air inlet; 120. Sub-ring pipe; 121. Air hole; 122. First air outlet direction; 123. Second air outlet direction; 124. Contour line; 130. Check valve; 20. Kettle body; 210. Feed inlet; 220. Discharge outlet; 30. Agitator; 310. Agitating end. DETAILED DESCRIPTION

[0050] The utility model is described in detail below in conjunction with the accompanying drawings.

[0051] Example 1

[0052] like Figure 1 to Figure 4 As shown, the present application provides a gas distributor for a reactor, comprising a gas inlet main pipe 110 and a plurality of sub-ring pipes 120, wherein the gas inlet main pipe 110 has a gas inlet port 111;

[0053] The central axes of the plurality of sub-annular tubes 120 coincide with each other, and the annular outer diameters of the sub-annular tubes 120 are different;

[0054] The sub-annular tubes 120 are arranged in layers, and the lower they are, the smaller the annular outer diameter of the sub-annular tubes is;

[0055] Each sub-ring tube 120 is provided with an air hole 121;

[0056] The vertically downward direction is the first air outlet direction 122 of the air hole 121;

[0057] On the vertical section passing through the central axis, the line connecting the centers of the sub-annular tubes 120 is the contour line 124 of the gas distributor, and the tangent direction of the contour line 124 where the centers of the sub-annular tubes 120 are located and the direction away from the central axis is the second gas outlet direction 123 of the gas hole 121;

[0058] The air outlet direction of the air hole 121 is between the first air outlet direction 122 and the second air outlet direction 123 .

[0059] Each sub-ring pipe 120 can be provided with an air hole 121 with a gas outlet direction between the first gas outlet direction 122 and the second gas outlet direction 123, so that the gas distributor can better distribute the gas. The reactor equipped with a gas distributor can also increase the gas content, have better reaction efficiency and a more complete reaction degree.

[0060] In this embodiment, five sub-ring tubes 120 are included.

[0061] In this embodiment, from the lowermost sub-annular tube 120 to the uppermost sub-annular tube 120 , the gas outlet directions of the air holes 121 on each sub-annular tube 120 are parallel.

[0062] In other embodiments, the gas outlet direction of the gas holes 121 on each sub-annular tube 120 changes along an arc from the first gas outlet direction 122 to the second gas outlet direction 123 .

[0063] The air outlet direction of the air hole 121 is parallel or changes along an arc from the first air outlet direction 122 to the second air outlet direction 123, which can effectively prevent the air from hitting the adjacent tube wall.

[0064] In this embodiment, there are two air intake main pipes 110 , each of which is tilted along each sub-annular pipe 120 , and each of the air intake main pipes 110 is evenly spaced along the circumference of the sub-annular pipe 120 .

[0065] In a vertical section passing through the central axis, two air intake main pipes 110 are arranged along opposite sides of the central axis, and the two air intake main pipes 110 respectively intake air symmetrically through two air intake ports 111 .

[0066] Compared with a gas distributor designed with a single air intake main pipe 110, the present application provides two symmetrical air intake main pipes 110, which can make the air output more uniform.

[0067] In other embodiments, the air intake main pipes may include three or four.

[0068] In this embodiment, a check valve 130 is installed on the air intake main pipe 110 , and the check valve 130 is disposed between the air intake port 111 and the uppermost sub-ring pipe 120 .

[0069] A check valve 130 is installed on the air intake main pipe 110 to prevent liquid from flowing back after the ventilation is stopped during intermittent ventilation.

[0070] In this embodiment, the material of the gas distributor is metal or ceramic.

[0071] For conventional reactant stirring, a gas distributor made of metal may be used. For reactant stirring that requires corrosion protection, a gas distributor 10 made of ceramic may be used.

[0072] In actual use, the number, diameter, and size of the gas holes 121 of the gas distributor should all be sufficient for the small holes to be able to discharge gas normally, and preferably the discharge speed is relatively uniform. Under the condition that the normal discharge can be satisfied, the aperture of the gas hole 121 can be as small as possible to facilitate the gas-liquid reaction. At the same time, the gas velocity of the distributor is controlled between 20m / s and 50m / s, and the aperture of the gas hole 121 is 1mm to 3mm.

[0073] The present application also provides a reaction kettle, comprising a kettle body 20 and a gas distributor 10 arranged at the bottom of the kettle body 20. The gas distributor 10 is the above-mentioned gas distributor for the reaction kettle.

[0074] The reactor provided in the present application is suitable for fermentation tanks and aerated polymer reactions.

[0075] In this embodiment, the gas inlet main pipe 110 of the gas distributor 10 is disposed on the kettle body 20 , and the gas inlet port 111 is located outside the kettle body 20 .

[0076] In this embodiment, the contour line 124 of the gas distributor 10 is adapted to the inner bottom wall of the kettle body 20;

[0077] The injection distance of the gas distributor 10 in the material through the air holes 121 is h1, and the distance between the bottom of the gas distributor 10 and the inner bottom wall of the kettle body 20 is h2, and h2 is between 1.1h1 and 1.3h1.

[0078] The spacing between the gas distributor 10 and the inner bottom wall of the kettle body 20 can prevent the two from being too close to each other and causing gas erosion on the bottom of the kettle.

[0079] In this embodiment, the reaction kettle further includes an agitator 30, which is coaxially arranged with the kettle body 20, and a stirring end 310 of the agitator 30 is arranged at the bottom of the kettle body 20;

[0080] The gas distributor 10 is coaxially arranged with the stirrer 30 and is arranged between the stirring end 310 of the stirrer 30 and the bottom wall of the kettle body 20 .

[0081] In this embodiment, the stirrer 30 is a spiral stirrer 30 , and the stirring end 310 is a propeller disposed at the bottom of the reaction kettle.

[0082] In this embodiment, a feed port 210 and a discharge port 220 are formed on the kettle body 20, and the feed port 210 and the discharge port 220 are respectively arranged at the top and the bottom of the kettle body 20. The material enters from the feed port 210 at the top of the kettle body 20 and flows out from the discharge port 220 at the bottom of the kettle body 20.

[0083] In this embodiment, the gas outlet directions of the air holes on each sub-ring tube 120 are all in the first gas outlet direction 122 , that is, they are all vertically downward.

[0084] In actual use, the uniformity of gas distribution is the result of the combined action of the agitator 30 and the gas distributor 10. The larger the projection area of ​​the gas distributor 10 on the transverse section of the kettle body 20 is within a certain range, the better, and the gas distributor 10 is as close to the bottom as possible. The gas residence time is related to the distributor and stirring. The smaller the opening of the distributor, the longer the gas stays in the liquid. The closer the distributor is to the bottom of the kettle, the longer the distance the gas needs to travel to leave the liquid, which is more conducive to the reaction.

[0085] Example 2

[0086] The difference between this embodiment and embodiment 1 is that, in this embodiment, the gas outlet direction of the gas holes on the sub-annular tube whose radial size of the gas distributor is smaller than the outer diameter of the stirring end is the first gas outlet direction, that is, they are all vertically downward;

[0087] The included angle between the gas outlet direction of the air holes on the remaining sub-ring tubes and the first gas outlet direction is 60° or 45°.

[0088] Example 3

[0089] The difference between this embodiment and embodiment 1 is that, in this embodiment, the gas outlet direction of the gas holes on the sub-annular tube of the gas distributor whose radial dimension is smaller than the outer diameter of the stirring end is the first gas outlet direction;

[0090] The gas outlet direction of the air hole on the uppermost sub-ring tube is the second gas outlet direction, that is, upward along the bottom wall of the reactor;

[0091] The gas outlet directions of the air holes on the remaining sub-annular tubes are between the first gas outlet direction and the second gas outlet direction.

[0092] In this embodiment, the angle between the gas outlet direction of the air holes on the other sub-annular tubes and the first gas outlet direction is 90°, 60°, 45° or 30°.

[0093] The above description is only a preferred embodiment of the utility model, and does not limit the patent protection scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the utility model.

Claims

1. A gas distributor for a reactor, characterized in that: It includes an air intake main pipe and a plurality of sub-ring pipes; The central axes of the plurality of sub-annular tubes coincide, and the annular outer diameters of the sub-annular tubes are different; The sub-annular tubes are arranged in layers, and the lower they are, the smaller the annular outer diameter of the sub-annular tubes is; Each sub-ring tube is provided with an air hole; The vertical downward direction is the first air outlet direction; On the vertical section passing through the central axis, the line connecting the centers of the sub-annular tubes is the contour line of the gas distributor, and the tangent direction of the contour line where the centers of the sub-annular tubes are located and the direction away from the central axis is the second gas outlet direction; The air outlet direction of the air hole is between the first air outlet direction and the second air outlet direction.

2. A gas distributor for a reactor as claimed in claim 1, characterized in that: The air outlet directions of the air holes on each sub-annular tube are parallel, or the air outlet directions of the air holes on each sub-annular tube change along an arc from a first air outlet direction to a second air outlet direction.

3. A gas distributor for a reactor as claimed in claim 1, characterized in that: The air intake main pipes include at least two, each of which is arranged obliquely along each sub-annular pipe, and each of which is evenly spaced along the circumference of the sub-annular pipe.

4. A gas distributor for a reactor as claimed in claim 1, characterized in that: A check valve is installed on the air intake main pipe.

5. A gas distributor for a reactor as claimed in claim 1, characterized in that: The material of the gas distributor is metal or ceramic.

6. A reaction kettle, characterized in that: It comprises a kettle body and a gas distributor arranged at the bottom of the kettle body, and the gas distributor is a gas distributor for a reaction kettle as claimed in any one of claims 1 to 5.

7. A reaction kettle as claimed in claim 6, characterized in that: The contour line of the gas distributor is adapted to the bottom wall of the kettle body; The injection distance of the gas distributor in the material through the air holes is h1, and the distance from the bottom of the gas distributor to the bottom wall of the kettle body is h2, and h2 is between 1.1h1 and 1.3h1.

8. A reaction kettle as claimed in claim 6, characterized in that: The reactor further comprises a stirrer, which is coaxially arranged with the reactor body, and a stirring end of the stirrer is arranged at the bottom of the reactor body; The gas distributor is coaxially arranged with the stirrer and is arranged between the stirring end of the stirrer and the bottom wall of the kettle body.

9. A reaction kettle as claimed in claim 8, characterized in that: The gas outlet direction of the air hole on the sub-annular tube whose radial dimension is smaller than the outer diameter of the stirring end is the first gas outlet direction; The gas outlet direction of the air holes on the sub-annular tube whose radial size is greater than or equal to the outer diameter of the stirring end is between the first gas outlet direction and the second gas outlet direction.

10. A reaction kettle as claimed in claim 8, characterized in that: The sub-annular tubes include 4 to 8, and the air outlet direction of the air hole of at least one of the lower sub-annular tubes is the first air outlet direction; The gas outlet direction of the air hole of at least one uppermost sub-ring tube is the second gas outlet direction.

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