Shielding gas replacement device for chemical reactor

Abstract

The utility model discloses a shielding gas replacement device for a chemical reactor. According to the structure, a continuous and spirally-extending belt-shaped body is arranged in an outer sleeve body, the belt-shaped body divides the space in the outer sleeve body into a continuous and spirally-extending channel, an input pipe and an output pipe are arranged at the two ends of the channel, an electric heater is arranged in the belt-shaped body, a protective gas pipe is arranged on a kettle body, and the inner side of the protective gas pipe is arranged in the kettle body. The outer side of the protective gas pipe is arranged outside the kettle body, a plurality of branch pipes are arranged on the inner side of the protective gas pipe, a plurality of coarse distribution holes are formed in the protective gas pipe, and a plurality of fine distribution holes are formed in the branch pipes. The device adopts a mode of air exchange under the liquid level, the main pipeline with the branch pipe extends to the position below the liquid level, the shielding gas is scattered into a reaction system through the two-stage distribution holes, and the material stirring effect is achieved while original air is fully replaced. Meanwhile, an efficient heat preservation structure is designed. The ventilation device is efficient in ventilation and easy to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, in particular to a protective gas replacement device for a chemical reactor. Background Art

[0002] A chemical reactor is a device that realizes a reaction process. It is used to realize a liquid phase single-phase reaction process and a liquid-liquid, gas-liquid, liquid-solid, gas-liquid-solid and other multiphase reaction processes. A stirring device (mechanical stirring, air flow stirring, etc.) is often provided inside the reactor. When the height-diameter ratio is relatively large, a multi-layer stirring blade can be used. When the material needs to be heated or cooled during the reaction process, a jacket can be set on the reactor wall, or a heat exchange surface can be set inside the reactor, or heat exchange can be performed through external circulation.

[0003] Commonly used reactor types are: ① Tubular reactor. It is composed of an empty tube or a filled tube with a relatively large length-to-diameter ratio, and can be used to achieve gas-phase and liquid-phase reactions. ② Tank reactor. It is composed of a cylindrical container with a relatively small length-to-diameter ratio, and is often equipped with a mechanical stirring or airflow stirring device. It can be used for liquid-phase single-phase reaction processes and multiphase reaction processes such as liquid-liquid phase, gas-liquid phase, and gas-liquid-solid phase. The one used for gas-liquid phase reaction processes is called a bubbling stirred tank; the one used for gas-liquid-solid phase reaction processes is called a stirred tank slurry reactor. ③ Reactor with a solid particle bed. Gas or liquid passes through a fixed or moving solid particle bed to achieve a multiphase reaction process, including a fixed bed reactor, a fluidized bed reactor, a moving bed reactor, a trickle bed reactor, etc. ④ Tower reactor. Tower equipment used to achieve gas-liquid phase or liquid-liquid phase reaction processes, including a packed tower, a plate tower, a bubbling tower, etc. ⑤ Jet reactor. Equipment that uses an ejector for mixing to achieve gas-phase or liquid-phase single-phase reaction processes and gas-liquid phase, liquid-liquid phase, and other multiphase reaction processes. Such as rotary kiln, aeration tank, etc. Some reaction processes need to be protected by inert gas to isolate the reactants from the air and control the direction of the reaction. At present, it is cumbersome and inefficient to build a protective gas environment for ordinary reactors, which affects the production process to a certain extent. Summary of the invention

[0004] The technical problem to be solved by the utility model is that it is relatively complicated and inefficient to construct a protective gas environment in a common reactor.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0006] The protective gas replacement device for chemical reactors comprises a kettle body, an end cover, a hand screw, a handle, a vent pipe, a buckle cover, an outer casing, an input pipe, an output pipe, a strip body, an electric heater, a protective gas pipe, a branch pipe, a coarse distribution hole, and a fine distribution hole; the end cover is rotatably connected to the port on the top of the kettle body, and the end cover is fastened to the kettle body by screws after the end cover is closed, a sealing ring is arranged between the end cover and the kettle body, a handle is arranged on the end cover, a vent pipe is arranged on the end cover, a buckle cover is arranged at the upper port of the vent pipe, and a The side of the kettle body has an outer sleeve, in which a continuous and spirally extending strip is built, the strip divides the space inside the outer sleeve into a continuous and spirally extending channel, an input pipe and an output pipe are provided at both ends of the channel, an electric heater is provided in the strip, a protective air pipe is provided on the kettle body, the inner side of the protective air pipe is in the kettle body, the outer side of the protective air pipe is outside the kettle body, a plurality of branch pipes are provided on the inner side of the protective air pipe, a plurality of coarse distribution holes are provided on the protective air pipe, and a plurality of fine distribution holes are provided on the branch pipe.

[0007] Preferably, the protective air pipe includes a horizontal pipe located on its upper side and a vertical pipe located on its lower side, the inner side of the horizontal pipe is connected to the upper end of the vertical pipe, and the outer side of the horizontal pipe is located outside the kettle body.

[0008] Preferably, the branch pipe forms an angle of 25° to 35° with the horizontal plane, and the bottom end of the vertical pipe is not closed.

[0009] Preferably, the ventilation pipe is a reducing pipe, the diameter of the lower side of the ventilation pipe is larger than the diameter of the upper side thereof, and the ventilation pipe is arranged at an angle.

[0010] Preferably, a one-way valve and a gate valve are respectively provided on the ventilation pipe, and a ball valve is provided on the protective air pipe.

[0011] Preferably, a bracket is provided at the bottom of the inner side of the kettle body, and the bottom of the protective air pipe and part of the branch pipe are fixed on the bracket.

[0012] Preferably, a through hole is provided on the side of the kettle body, and the protective air pipe passes through the kettle body through the through hole, and the protective air pipe and the through hole are welded and sealed.

[0013] In the structure of the utility model, the kettle body is the main container of the chemical reactor; the end cover can be closed to form a closed structure; the end cover can be fixed by a hand screw; the handle is convenient for opening the end cover; the vent pipe can be used as an external discharge passage for the displaced protective gas; the buckle cover can close this passage when it is not used; the outer shell can be flushed with cold water or hot water to adjust the temperature of the kettle body; the first function of the strip body is to construct a continuously spiraling channel, so that cold water or hot water can be flushed into the channel, and the output pipe and the input pipe serve as the entrance and exit of this channel; the second function of the strip body is to set an electric heater, and the temperature can be further controlled by the electric heater; the protective gas pipe is used to deliver the external pressurized protective gas (nitrogen bottle, etc.) into the kettle body, and the branch pipe disperses the protective gas to the outside, and finally scatters it from the coarse distribution holes and the fine distribution holes. The continuously scattered protective gas not only plays the role of gas protection atmosphere, but also has a churning effect on the reaction system in the process of floating upward. When in use, first pass the protective gas for a period of time to ensure that it is sufficient to completely replace the original air in the kettle body, and then add the reactants from the ventilation pipe; during the reaction, continue to keep the protective gas flowing to ensure that the reaction system is in a protective gas atmosphere.

[0014] The utility model discloses a protective gas replacement device for a chemical reactor. The device adopts a sub-liquid-surface ventilation mode, with a main pipe with a branch pipe extending below the liquid surface, and uses a double-stage distribution hole to scatter the protective gas into the reaction system, which fully replaces the original air and plays a mixing role. At the same time, the utility model designs an efficient heat preservation structure. The utility model has efficient ventilation and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] Figure 2 It is a cross-sectional view of the lower side of the utility model;

[0017] Figure 3 It is an axonal view of the protected trachea;

[0018] in:

[0019] 1. Kettle body 2. End cover 3. Thumb screw 4. Handle

[0020] 5. Ventilation pipe 6. Buckle cover 7. Outer casing 8. Input pipe

[0021] 9. Output pipe 10. Strip body 11. Electric heater 12. Protective air pipe

[0022] 13. Branch pipe 14. Coarse distribution hole 15. Fine distribution hole. DETAILED DESCRIPTION

[0023] The specific implementation methods of the present invention will be described in detail below. In order to avoid too many unnecessary details, the well-known structures or functions will not be described in detail in the following examples. The approximate language used in the following examples can be used for quantitative expression, indicating that the quantity can be allowed to change without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following examples have the same meanings as those generally understood by technicians in the field to which the present invention belongs.

[0024] Example 1

[0025] Protective gas replacement device for chemical reactors, see Figures 1 to 3, including a kettle body 1, an end cover 2, a hand screw 3, a handle 4, a vent pipe 5, a buckle cover 6, an outer casing 7, an input pipe 8, an output pipe 9, a strip body 10, an electric heater 11, a protective air pipe 12, a branch pipe 13, a coarse distribution hole 14, and a fine distribution hole 15; the end cover 2 is rotatably connected to the port on the top of the kettle body 1, and the end cover 2 is fastened to the kettle body 1 by screws 3 after the end cover 2 is closed, a sealing ring is provided between the end cover 2 and the kettle body 1, a handle 4 is provided on the end cover 2, a vent pipe 5 is provided on the end cover 2, a buckle cover 6 is provided at the upper end of the vent pipe 5, and an outer casing 7 is provided on the outside of the kettle body 1 A continuous and spirally extending strip 10 is built into the outer shell 7, and the strip 10 divides the space inside the outer shell 7 into a continuous and spirally extending channel, and an input pipe 8 and an output pipe 9 are provided at both ends of the channel. An electric heater 11 is provided in the strip 10, and a protective air pipe 12 is provided on the kettle body 1. The inner side of the protective air pipe 12 is in the kettle body 1, and the outer side of the protective air pipe 12 is outside the kettle body 1. There are multiple branch pipes 13 on the inner side of the protective air pipe 12, and multiple coarse distribution holes 14 are provided on the protective air pipe 12, and multiple fine distribution holes 15 are provided on the branch pipe 13. Among them, the kettle body 1 is the main container of the chemical reactor; the end cover 2 can be closed to form a closed structure; the hand screw 3 can fix the end cover 2; the handle 4 is convenient for opening the end cover 2; the vent pipe 5 can be used as an external discharge passage for the displaced protective gas; the buckle cover 6 can close this passage when not in use; the outer shell 7 can be flushed with cold water or hot water to adjust the temperature of the kettle body 1; the first function of the strip body 10 is to construct a continuously spiraling channel, so that cold water or hot water can be flushed into the channel, and the output pipe 9 and the input pipe 8 serve as the entrance and exit of this channel; the second function of the strip body 10 is to set an electric heater 11, and the temperature can be further controlled by the electric heater 11; the protective gas pipe 12 is used to deliver the external pressurized protective gas (nitrogen bottle, etc.) into the kettle body 1, and the branch pipe 13 disperses the protective gas to the outside, and finally scatters out from the coarse distribution hole 14 and the fine distribution hole 15. The continuously scattered protective gas not only plays the role of gas protection atmosphere, but also plays a churning role on the reaction system in the process of floating upward. When in use, first pass the protective gas for a period of time to ensure that it is sufficient to completely replace the original air in the kettle body 1, and then add the reactants from the ventilation pipe 5; during the reaction process, continue to keep the protective gas flowing to ensure that the reaction system is in a protective gas atmosphere.

[0026] Example 2

[0027] Protective gas replacement device for chemical reactors, see Figures 1 to 3, including a kettle body 1, an end cover 2, a hand screw 3, a handle 4, a vent pipe 5, a buckle cover 6, an outer casing 7, an input pipe 8, an output pipe 9, a strip body 10, an electric heater 11, a protective air pipe 12, a branch pipe 13, a coarse distribution hole 14, and a fine distribution hole 15; the end cover 2 is rotatably connected to the port on the top of the kettle body 1, and the end cover 2 is fastened to the kettle body 1 by screws 3 after the end cover 2 is closed, a sealing ring is provided between the end cover 2 and the kettle body 1, a handle 4 is provided on the end cover 2, a vent pipe 5 is provided on the end cover 2, a buckle cover 6 is provided at the upper end of the vent pipe 5, and an outer casing 7 is provided on the outside of the kettle body 1 A continuous and spirally extending strip 10 is built into the outer shell 7. The strip 10 divides the space inside the outer shell 7 into a continuous and spirally extending channel. An input pipe 8 and an output pipe 9 are provided at both ends of the channel. An electric heater 11 is provided in the strip 10. A protective air pipe 12 is provided on the kettle 1. The inner side of the protective air pipe 12 is in the kettle 1, and the outer side of the protective air pipe 12 is outside the kettle 1. There are multiple branch pipes 13 on the inner side of the protective air pipe 12. Multiple coarse distribution holes 14 are provided on the protective air pipe 12, and multiple fine distribution holes 15 are provided on the branch pipe 13. The protective air pipe 12 includes a horizontal pipe located on its upper side and a vertical pipe located on its lower side. The inner side of the horizontal pipe is connected to the upper end of the vertical pipe, and the outer side of the horizontal pipe is located outside the kettle 1. The branch pipe 13 is at an angle of 25° to 35° with the horizontal plane, and the bottom end of the vertical pipe is not closed. The vent pipe 5 is a reducer, the diameter of the lower side of the vent pipe 5 is larger than the diameter of the upper side, and the vent pipe 5 is inclined. A one-way valve and a gate valve are respectively provided on the vent pipe 5, and a ball valve is provided on the protective air pipe 12. A bracket is provided at the bottom of the inner side of the kettle body 1, and the bottom of the protective air pipe 12 and part of the branch pipe 13 are fixed on the bracket. A through hole is provided on the side of the kettle body 1, and the protective air pipe 12 passes through the kettle body 1 through the through hole, and the protective air pipe 12 and the through hole are welded and sealed.

[0028] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of application of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protective gas replacement device for a chemical reactor, characterized in that: The invention comprises a kettle body (1), an end cover (2), a hand screw (3), a handle (4), a vent pipe (5), a buckle cover (6), an outer casing (7), an input pipe (8), an output pipe (9), a strip body (10), an electric heater (11), a protective air pipe (12), a branch pipe (13), a coarse distribution hole (14), and a fine distribution hole (15); the end cover (2) is rotatably connected to the port at the top of the kettle body (1); the end cover (2) is fastened to the kettle body (1) by a screw (3) after the end cover (2) is closed; a sealing ring is provided between the end cover (2) and the kettle body (1); a handle (4) is provided on the end cover (2); a vent pipe (5) is provided on the end cover (2); a buckle cover (6) is provided at the upper end of the vent pipe (5); The outer side of the kettle body (1) is provided with an outer casing (7), a continuous and spirally extending strip-shaped body (10) is built in the outer casing (7), the strip-shaped body (10) divides the space inside the outer casing (7) into a continuous and spirally extending channel, an input pipe (8) and an output pipe (9) are provided at both ends of the channel, an electric heater (11) is provided in the strip-shaped body (10), a protective air pipe (12) is provided on the kettle body (1), the inner side of the protective air pipe (12) is in the kettle body (1), the outer side of the protective air pipe (12) is outside the kettle body (1), a plurality of branch pipes (13) are provided on the inner side of the protective air pipe (12), a plurality of coarse distribution holes (14) are provided on the protective air pipe (12), and a plurality of fine distribution holes (15) are provided on the branch pipe (13).

2. The protective gas replacement device for a chemical reactor according to claim 1, characterized in that: The protective gas pipe (12) comprises a horizontal pipe located on its upper side and a vertical pipe located on its lower side, the inner side of the horizontal pipe is connected to the upper end of the vertical pipe, and the outer side of the horizontal pipe is located outside the kettle body (1).

3. The protective gas replacement device for a chemical reactor according to claim 2, characterized in that: The branch pipe (13) is at an angle of 25° to 35° with the horizontal plane, and the bottom end of the vertical pipe is not closed.

4. The protective gas replacement device for a chemical reactor according to claim 1, characterized in that: The ventilation pipe (5) is a variable diameter pipe, the diameter of the lower side of the ventilation pipe (5) is greater than the diameter of the upper side thereof, and the ventilation pipe (5) is arranged obliquely.

5. The protective gas replacement device for a chemical reactor according to claim 1, characterized in that: A one-way valve and a gate valve are respectively provided on the ventilation pipe (5), and a ball valve is provided on the protective air pipe (12).

6. The protective gas replacement device for a chemical reactor according to claim 1, characterized in that: A bracket is provided at the bottom of the inner side of the kettle body (1), and the bottom of the protective air pipe (12) and part of the branch pipe (13) are fixed on the bracket.

7. The protective gas replacement device for a chemical reactor according to claim 1, characterized in that: A through hole is provided on the side of the kettle body (1), and the protective air pipe (12) passes through the through hole and out of the kettle body (1), and the protective air pipe (12) and the through hole are welded and sealed.

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