Integrated mixer with carbide removal and mixing functions and its mixing method

Abstract

This invention discloses an integrated mixer with decarburization and mixing functions and its mixing method. The mixer has a simple structure and can integrate decarburization and mixing functions together. It has the dual function of separating carbides and mixing two materials, and has strong applicability. In addition, the mixer and its mixing method can not only achieve uniform mixing of materials and improve the external diffusion and effect of the reaction, but also improve the conversion rate and yield of the reaction.

Description

Technical Field

[0001] This invention provides an integrated mixer with carbide removal and mixing functions, and a mixing method thereof. Background Technology

[0002] Methanol and hydrogen chloride react in the gas phase to produce chloromethane and water at 280–330 °C and 0.33 MPaG, with activated alumina as a catalyst. The reaction equation is as follows:

[0003] Methanol and hydrogen chloride react in the gas phase to produce chloromethane and water at 280–330 °C and 0.33 MPaG under the condition of activated alumina as a catalyst. The reaction equation is as follows: CH3OH + HCl → CH3Cl + H2O + 8.2 kcal / mol (catalyst 280–300 °C). The reaction is exothermic, and the heat of reaction is removed through Dowsen A. The following side reactions also occur:

[0004] 2CH3OH→CH3OCH3+H2O.

[0005] The reaction depends on the conversion and yield of the catalyst, but the conversion rate is related to the reaction ratio, mixing degree, reaction temperature, residence time, and the external diffusion, internal diffusion, and mass transfer within the catalyst particles in the reactor. The reaction ratio, reaction temperature, and residence time can be controlled by instruments such as flow rate, pressure, and temperature. The mixing degree is achieved by a static mixer on the original feed system. During maintenance, a large amount of powdery carbon deposits were found in the mixer. This was due to the presence of carbon deposits from overheated methanol. Additionally, hydrogen chloride contains a small amount of organic matter, which also produces carbon deposits due to heat. Feeding these carbon deposits into the reactor will affect the mass transfer process of the catalyst, thereby affecting the reaction effect. Summary of the Invention

[0006] This invention provides an integrated mixer with decarburization and mixing functions and its mixing method. The mixer has a simple structure and can integrate decarburization and mixing functions together. It has the dual function of separating carbides and mixing two materials, and has strong applicability. In addition, the mixer and its mixing method can not only achieve uniform mixing of materials, improve the external diffusion and effect of the reaction, but also improve the conversion rate and yield of the reaction.

[0007] The present invention adopts the following technical solution: an integrated mixer with decarbonate removal and mixing functions, which mainly includes a bottom separation section and an upper mixing section. The separation section is set as a cyclone separator, with a methanol gas inlet on the side of the cyclone separator and a gas outlet pipe on the top of the cyclone separator for outputting the separated gas. A carbonate discharge outlet is provided at the bottom of the cyclone separator. The mixing section includes a mixing cylinder, with an air inlet pipe at the bottom of the mixing cylinder. A gas filter screen is provided inside the air inlet pipe of the mixing cylinder. Air inlet I and air inlet II are respectively provided at the bottom and side of the air inlet pipe. The gas outlet pipe of the cyclone separator is connected to the mixing cylinder through air inlet I. Air inlet II is set as an inlet for hydrogen chloride gas. Several obliquely placed corrugated plates are distributed from top to bottom in the mixing cylinder. The obliquely placed corrugated plates are installed on the upper part of the gas filter screen. A mixed gas outlet is provided at the top of the mixing cylinder.

[0008] The mixing cylinder contains three obliquely placed corrugated plates arranged from top to bottom: an upper corrugated plate, a middle corrugated plate, and a lower corrugated plate. The upper corrugated plate is obliquely placed in the upper chamber of the mixing cylinder, the middle corrugated plate is obliquely placed in the middle chamber of the mixing cylinder, and the lower corrugated plate is obliquely placed in the lower chamber of the mixing cylinder. The oblique directions of the upper, middle, and lower corrugated plates are staggered. An upper airflow port is provided between one end of the upper corrugated plate and the inner surface of the upper chamber, a middle airflow port is provided between one end of the middle corrugated plate and the inner surface of the middle chamber, and a lower airflow port is provided between one end of the lower corrugated plate and the inner surface of the lower chamber. The upper, middle, and lower airflow ports are on the same side. The air inlet pipe of the mixing cylinder sequentially passes through a portion of the lower chamber, the lower airflow port, a portion of the middle chamber, the middle airflow port, a portion of the upper chamber, the upper airflow port, and forms an airflow channel with the mixed gas outlet. The airflow channel is connected to the mixed gas outlet.

[0009] The included angle between the upper corrugated plate and the middle corrugated plate is 90°, and the included angle between the middle corrugated plate and the lower corrugated plate is 90°.

[0010] The upper corrugated plate, middle corrugated plate, and lower corrugated plate are ABS corrugated plates or PVC corrugated plates.

[0011] The methanol gas inlet is a conical opening. The gas outlet pipe at the top of the cyclone separator is connected to the inlet pipe at the bottom of the mixing cylinder by a flange.

[0012] This invention also discloses a method for mixing using an integrated mixer with carbide removal and mixing functions. The method includes the following steps: First, crude methanol gas is tangentially introduced into the cyclone separator through the methanol gas inlet on the side of the separator to separate the methanol gas and carbides. Then, the separated carbides are discharged through the carbide outlet. The separated methanol gas enters the inlet pipe of the mixing cylinder through the gas outlet pipe of the cyclone separator. Hydrogen chloride gas entering the inlet pipe from inlet II is filtered through a gas filter. After filtration, the methanol gas and hydrogen chloride gas are mixed within the mixing cylinder. During mixing, the methanol gas and hydrogen chloride gas sequentially pass through a portion of the lower chamber and the lower corrugated plate collision and division within the lower chamber, the lower air outlet, a portion of the middle chamber and the middle corrugated plate collision and division within the middle chamber, the middle air outlet, a portion of the upper chamber and the upper corrugated plate collision and division within the upper chamber, and the upper air outlet, resulting in a uniform mixed gas. During the cutting and collision process, the mixed gas is discharged from the mixing cylinder under the guidance of the airflow channel.

[0013] The present invention employs a collision-splitting process involving a lower corrugated plate, a middle corrugated plate, and an upper corrugated plate as follows: the methanol gas and hydrogen chloride gas undergo a first collision-splitting process on the corrugations of the lower corrugated plate to form gas particles; then, the gas particles after the first collision-splitting process are rotated 90° and undergo a second collision-splitting process on the corrugations of the middle corrugated plate; finally, the gas particles after the second collision-splitting process are rotated 90° again and undergo a third collision-splitting process on the corrugations of the upper corrugated plate, resulting in a mixture of uniform gas particles.

[0014] The present invention has the following beneficial effects: After adopting the above technical solution, the mixer of the present invention has a simple structure, which can integrate the decarbonization function and the mixing function together. It has the dual functions of separating carbides and mixing two materials, and the dual functions of filtering mechanical impurities and static mixing of two materials. Since the carbides in the methanol gas are removed, the carbides can be prevented from clogging the catalyst, thereby improving the internal diffusion effect of the catalyst, improving the conversion rate and yield of the reaction, and having strong applicability. In addition, the mixer and its mixing method can not only complete the uniform mixing of materials and improve the external diffusion and effect of the reaction, but also improve the conversion rate and yield of the reaction. The mixing cylinder of this invention comprises an upper corrugated plate, a middle corrugated plate, and a lower corrugated plate. The upper corrugated plate is obliquely placed in the upper chamber of the mixing cylinder, the middle corrugated plate is obliquely placed in the middle chamber of the mixing cylinder, and the lower corrugated plate is obliquely placed in the lower chamber of the mixing cylinder. The oblique directions of the upper, middle, and lower corrugated plates are staggered, with an angle of 90° between the upper and middle corrugated plates and an angle of 90° between the middle and lower corrugated plates. This arrangement allows for the segmentation of the mixed gas, maximizing mixing efficiency and achieving uniform mixing of gaseous materials, thereby improving the external diffusion of the reaction. This invention improves the reaction efficiency. An upper airflow port is provided between one end of the upper corrugated plate and the inner surface of the upper chamber; a middle airflow port is provided between one end of the middle corrugated plate and the inner surface of the middle chamber; and a lower airflow port is provided between one end of the lower corrugated plate and the inner surface of the lower chamber. The upper, middle, and lower airflow ports are on the same side. The air inlet pipe of the mixing cylinder sequentially passes through a portion of the lower chamber, the lower airflow port, a portion of the middle chamber, the middle airflow port, a portion of the upper chamber, the upper airflow port, and forms an airflow channel with the mixed gas outlet. This airflow channel communicates with the mixed gas outlet, thus enabling the mixing cylinder to have a flow guiding effect and ensuring better output of the mixed gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the mixer of the present invention. Detailed Implementation

[0016] exist Figure 1This invention relates to an integrated mixer with carbide removal and mixing functions. It mainly comprises a bottom separation section and an upper mixing section. The separation section is a cyclone separator 1 with a methanol gas inlet 2 on its side, the inlet being a conical opening. A gas outlet pipe 3 is located at the top of the cyclone separator 1 for outputting the separated gas. A carbide outlet 4 is located at the bottom of the cyclone separator 1. The mixing section includes a mixing cylinder 5 with an inlet pipe 6 at its bottom. A gas filter screen 9 is installed inside the inlet pipe 6. The sides are respectively provided with air inlet I7 and air inlet II8. The gas outlet pipe 3 of the cyclone separator 1 is connected to the inside of the mixing cylinder 5 through air inlet I7. Air inlet II8 is set as the inlet for hydrogen chloride gas. Several obliquely placed corrugated plates are distributed from top to bottom inside the mixing cylinder 5. In this embodiment, three obliquely placed corrugated plates are distributed from top to bottom inside the mixing cylinder 5. The three obliquely placed corrugated plates are installed on the upper part of the gas filter screen 9. The three corrugated plates are the upper corrugated plate 11, the middle corrugated plate 12, and the lower corrugated plate 13. The upper corrugated plate 11 is obliquely placed in the upper chamber 14 of the upper part of the mixing cylinder 5, and the middle corrugated plate 12 is obliquely placed in the middle chamber 13 of the mixing cylinder 5. Inside the middle chamber 15 of the mixing cylinder 5, the lower corrugated plate 13 is placed obliquely in the lower chamber 16 of the mixing cylinder 5. The inclination directions of the upper corrugated plate 11, the middle corrugated plate 12, and the lower corrugated plate 13 are staggered. An upper airflow port 17 is provided between one end of the upper corrugated plate 11 and the inner surface of the upper chamber 14, a middle airflow port 18 is provided between one end of the middle corrugated plate 12 and the inner surface of the middle chamber 15, and a lower airflow port 19 is provided between one end of the lower corrugated plate 13 and the inner surface of the lower chamber 16. The upper airflow port 17, the middle airflow port 18, and the lower airflow port 19 are on the same side. The air inlet pipe 6 of the mixing cylinder 5 passes through part of the lower chamber 16 and the lower airflow port 19 in sequence. An airflow channel is formed between the outlet 19, part of the middle chamber 15, the middle airflow outlet 18, part of the upper chamber 14, the upper airflow outlet 17, and the mixed gas outlet 10. The included angle between the upper corrugated plate 11 and the middle corrugated plate 12 is 90°, and the included angle between the middle corrugated plate 12 and the lower corrugated plate 13 is 90°. In this embodiment, the corrugated plate 11, the middle corrugated plate 12, and the lower corrugated plate 13 are ABS corrugated plates or PVC corrugated plates. A mixed gas outlet 10 is provided at the top of the mixing cylinder 5, and the airflow channel is connected to the mixed gas outlet 10. The gas outlet pipe 3 at the top of the cyclone separator 1 and the air inlet pipe 6 at the bottom of the mixing cylinder 5 are connected by a flange.

[0017] This invention also discloses a method for mixing using an integrated mixer with carbide removal and mixing functions. The method includes the following steps: First, methanol gas is tangentially introduced into the cyclone separator 1 through the methanol gas inlet 2 on the side of the separator to separate the methanol gas and carbides. Then, the separated carbides are discharged through the carbide outlet 4. The separated methanol gas enters the inlet pipe 6 of the mixing cylinder 5 through the gas outlet pipe 3 of the cyclone separator 1. Hydrogen chloride gas entering the inlet pipe 6 through the inlet port II 8 is filtered together with the methanol gas through the gas filter screen 9. After filtration, the methanol gas and hydrogen chloride gas are mixed in the mixing cylinder 5. During mixing in the mixing cylinder 5, the methanol gas and hydrogen chloride gas sequentially pass through a portion of the lower chamber 16, the lower corrugated plate 13 within the lower chamber 16 for collision and separation, the lower air outlet 19, and a portion of the middle chamber 1. The gas mixture is formed by the collision and division of the middle corrugated plate 12 in the middle chamber 15, the middle air outlet 18, part of the upper chamber 14, the collision and division of the upper corrugated plate 11 in the upper chamber 14, and the upper air outlet 17. The mixed gas is then uniformly mixed and discharged from the mixing cylinder under the guidance of the airflow channel during the cutting and collision process. The collision and division process of the lower corrugated plate 13, the middle corrugated plate 12 and the upper corrugated plate 11 of the present invention is as follows: the methanol gas and hydrogen chloride gas are firstly collisionally divided by the corrugations on the lower corrugated plate 13 to form gas particles. Then, the gas particles after the first collision and division are rotated 90° and then collided and divided a second time by the corrugations on the middle corrugated plate 12. Finally, the gas particles after the second collision and division are rotated 90° again and then collided and divided a third time by the corrugations on the upper corrugated plate 11 to form a mixed gas with uniform gas particles.

Claims

1. A mixing method using an integrated mixer with decarburization and mixing functions, characterized in that it The following steps are involved: First, the methanol gas feedstock is tangentially introduced into the cyclone separator (1) through the methanol gas inlet (2) on the side of the cyclone separator (1) to separate the methanol gas and carbides in the methanol gas feedstock. Then, the separated carbides are discharged through the carbides outlet (4). The separated methanol gas enters the inlet pipe (6) of the mixing cylinder (5) through the gas outlet pipe (3) of the cyclone separator (1). The hydrogen chloride gas entering the inlet pipe (6) from the inlet II (8) is filtered together by the gas filter screen (9). After filtration, the methanol gas and hydrogen chloride gas are mixed in the mixing cylinder (5). During the mixing in the mixing cylinder (5), the methanol gas and hydrogen chloride gas pass through part of the lower chamber (16) and the lower corrugated plate (13) in the lower chamber (16) for collision and division, the lower air outlet (19), part of the middle chamber (15) and the middle corrugated plate in the middle chamber (15) in sequence. After the collision and division of plate (12), the middle air outlet (18), part of the upper chamber (14), and the upper corrugated plate (11) in the upper chamber (14) and the upper air outlet (17) are uniformly mixed to form a uniform mixed gas. During the cutting and collision process, the mixed gas is discharged from the mixing cylinder under the guidance of the airflow channel. The collision and division process of the lower corrugated plate (13), the middle corrugated plate (12) and the upper corrugated plate (11) is as follows: the methanol gas and hydrogen chloride gas are firstly collided and divided by the corrugations on the lower corrugated plate (13) to form gas particles. Then, the gas particles after the first collision and division are flipped 90° and collided and divided a second time by the corrugations on the middle corrugated plate (12). Finally, the gas particles after the second collision and division are flipped 90° again and collided and divided a third time by the corrugations on the upper corrugated plate (11) to form a mixed gas with uniform gas particles.

2. The mixing method according to claim 1, using an integrated mixer with decarburization and mixing functions, is characterized in that... The integrated mixer with decarbonization and mixing functions mainly includes a bottom separation section and an upper mixing section. The separation section is a cyclone separator (1). A methanol gas inlet (2) is provided on the side of the cyclone separator (1). A gas outlet pipe (3) is provided at the top of the cyclone separator (1). The gas outlet pipe (3) is used to output the separated gas. A carbonization outlet (4) is provided at the bottom of the cyclone separator (1). The mixing section includes a mixing cylinder (5). An air inlet pipe (6) is provided at the bottom of the mixing cylinder (5). A gas filter screen (9) is provided in the air inlet pipe (6) of the mixing cylinder (5). The bottom and side of the air inlet pipe (6) are respectively provided with air inlet I (7) and air inlet II (8). The gas outlet pipe (3) of the cyclone separator (1) is connected to the mixing cylinder (5) through air inlet I (7). Air inlet II (8) is set as the inlet of hydrogen chloride gas. Several inclined corrugated plates are distributed from top to bottom in the mixing cylinder (5). Several inclined corrugated plates are installed on the upper part of the gas filter screen (9). A mixed gas outlet (10) is provided at the top of the mixing cylinder (5).

3. The method for mixing using an integrated mixer with decarburization and mixing functions as described in claim 1 or 2, characterized in that: The mixing cylinder (5) has three obliquely placed corrugated plates distributed from top to bottom. The three corrugated plates are an upper corrugated plate (11), a middle corrugated plate (12), and a lower corrugated plate (13). The upper corrugated plate (11) is obliquely placed in the upper chamber (14) of the mixing cylinder (5), the middle corrugated plate (12) is obliquely placed in the middle chamber (15) of the mixing cylinder (5), and the lower corrugated plate (13) is obliquely placed in the lower chamber (16) of the mixing cylinder (5). The oblique directions of the upper corrugated plate (11), the middle corrugated plate (12), and the lower corrugated plate (13) are staggered. An upper airflow port (17) is provided between one end of the upper chamber (14) and the inner surface of the middle corrugated plate (12) and the inner surface of the middle chamber (15). A middle airflow port (18) is provided between one end of the lower corrugated plate (13) and the inner surface of the lower chamber (16). The air inlet pipe (6) of the mixing cylinder (5) passes through part of the lower chamber (16), the lower airflow port (19), part of the middle chamber (15), the middle airflow port (18), part of the upper chamber (14), the upper airflow port (17) and the mixed gas outlet (10) to form an airflow channel. The airflow channel is connected to the mixed gas outlet (10).

4. The mixing method according to claim 3, using an integrated mixer with decarburization and mixing functions, is characterized in that... The included angle between the upper corrugated plate (11) and the middle corrugated plate (12) is 90°, and the included angle between the middle corrugated plate (12) and the lower corrugated plate (13) is 90°.

5. The mixing method according to claim 3, using an integrated mixer with decarburization and mixing functions, is characterized in that... The upper corrugated plate (11), the middle corrugated plate (12) and the lower corrugated plate (13) are ABS corrugated plates or PVC corrugated plates.

6. The method of mixing using an integrated mixer with decarbonization and mixing functions as described in claim 1 or 2, characterized in that the methanol gas inlet (2) is set as a conical opening.

7. The method for mixing using an integrated mixer with decarburization and mixing functions as described in claim 1 or 2, characterized in that: The gas outlet pipe (3) at the top of the cyclone separator (1) is connected to the inlet pipe (6) at the bottom of the mixing cylinder (5) by a flange.

Images