Efficient esterification reactor for methyl methacrylate

Abstract

The utility model discloses an efficient methyl methacrylate esterification reactor which comprises a barrel, the inner wall of the barrel is fixedly connected with a stirring barrel through four fixing blocks, two feeding pipes fixedly connected with the barrel are inserted into the top of the barrel in a penetrating mode, the bottom ends of the two feeding pipes are both communicated with the stirring barrel, and the bottom ends of the two feeding pipes are communicated with the stirring barrel. And the right side of the stirring barrel communicates with a discharging pipe and a waste gas pipe, the right end of the discharging pipe and the right end of the waste gas pipe both penetrate through and extend to the outer side of the barrel body, valves are installed on the two feeding pipes and the discharging pipe, and a stirring mechanism is installed on the stirring barrel. According to the methyl methacrylate esterification reaction device, the effect of preheating the container used for methyl methacrylate esterification reaction can be achieved, the reaction efficiency is further improved, medium waste heat used for heating the container can be utilized, reaction raw materials and catalysts can be preheated, the reaction speed is further increased, and the processing efficiency of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of esterification reactors, and more specifically, to a high-efficiency methyl methacrylate esterification reactor. Background Art

[0002] A high-efficiency esterification reactor for methyl methacrylate (MMA) is a device specifically designed for the production of MMA, which prepares MMA by carrying out an esterification reaction between methacrylic acid (MAA) and methanol (MeOH) under the action of a catalyst.

[0003] Chinese Patent with the authorization announcement number CN 214438978 U discloses a high-efficiency methyl methacrylate esterification reactor, which specifically relates to the field of reaction kettle equipment, including a reaction barrel, a reaction inner barrel and a measuring cylinder. One side outer wall of the bottom of the reaction inner barrel is respectively provided with a feeding port and a discharging port, one side outer wall of the top of the reaction barrel is provided with a steam discharge port, one side outer wall of the bottom of the reaction barrel is provided with a steam inlet, one end of the top of the measuring cylinder is fixedly provided with a feeding hopper, one side outer wall of the bottom of the measuring cylinder is fixedly provided with scale wire grooves vertically and equally spaced upward, and one end of the bottom of the measuring cylinder is communicated with a catalyst feeding pipe. In the utility model, the blade inclination angles of the first stirring paddle and the second stirring paddle correspond to each other, and stirring and mixing holes are opened on the blades of the first stirring paddle and the second stirring paddle, thereby improving the reaction rate of the raw materials and the catalyst in the reaction kettle. The catalyst is poured into the measuring cylinder through the feeding pipe at the bottom of the catalyst storage box, which is convenient for putting an appropriate amount of catalyst into the reaction kettle.

[0004] In the above patent, the raw materials and the catalyst are assisted in heating by steam to improve the reaction efficiency. After the steam completes the auxiliary heating, the gas still has a certain temperature, and the direct discharge of the gas will cause waste of energy. Therefore, a high-efficiency methyl methacrylate esterification reactor is needed. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a high-efficiency methyl methacrylate esterification reactor that can realize the preheating effect on the container for methyl methacrylate esterification reaction, so as to solve the problems in the background art.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions;

[0007] A high-efficiency esterification reactor for methyl methacrylate, comprising a cylinder body. The inner wall of the cylinder body is fixedly connected with a stirring cylinder through four fixing blocks. Two feed pipes fixedly connected to the cylinder body penetrate through the top of the cylinder body. The bottom ends of the two feed pipes are communicated with the stirring cylinder. A discharge pipe and an exhaust pipe are communicated with the right side of the stirring cylinder. The right ends of the discharge pipe and the exhaust pipe penetrate through and extend to the outside of the cylinder body. Valves are installed on the two feed pipes and the discharge pipe. A stirring mechanism is installed on the stirring cylinder. The back of the cylinder body is fixedly connected with an air inlet pipe communicated with it. Two exhaust pipes communicated with the cylinder body penetrate through the top of the cylinder body. A heat exchange box is arranged at the top of the cylinder body. The heat exchange box is sleeved on and fixedly connected to the two feed pipes and the two exhaust pipes respectively. The top ends of the two exhaust pipes are communicated with the heat exchange box. An air outlet pipe is communicated with the top of the heat exchange box.

[0008] As a further description of the above technical solution:

[0009] The stirring mechanism includes a motor. The bottom of the motor is fixedly connected with the cylinder body. The output shaft of the motor is fixedly connected with a stirring rod. The bottom end of the stirring rod penetrates through the cylinder body and is inserted into the stirring cylinder.

[0010] As a further description of the above technical solution:

[0011] The stirring rod includes a first conduit. The top end of the first conduit is fixedly connected with the output shaft of the motor. The bottom end of the first conduit penetrates through the cylinder body and the stirring cylinder in sequence and extends into the interior of the stirring cylinder. Two cross pipes are communicated with the top end of the first conduit. Two stirring pipes are communicated with the bottom end of the first conduit. A second conduit rotatably connected with the stirring cylinder penetrates through the bottom of the stirring cylinder. The top ends of the second conduit are respectively communicated with the two stirring pipes.

[0012] As a further description of the above technical solution:

[0013] Shaft seals are installed at the top and bottom of the stirring cylinder. The two shaft seals are respectively installed on the first conduit and the second conduit.

[0014] As a further description of the above technical solution:

[0015] A controller for controlling the opening and closing of the motor is installed on the front of the cylinder body.

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] This solution can achieve the effect of preheating the container for the esterification reaction of methyl methacrylate, thereby improving the reaction efficiency. Moreover, the waste heat of the medium used for heating the container can be utilized to preheat the reaction raw materials and catalysts, further improving the reaction speed and the processing efficiency of the device. Brief Description of the Drawings

[0018] Figure 1 The first perspective view of the present utility model;

[0019] Figure 2 The second perspective view of the present utility model;

[0020] Figure 3 The sectional view of the present utility model;

[0021] Figure 4 Of the present utility model Figure 3 The enlarged view of part A.

[0022] Explanation of the reference numerals in the figures:

[0023] 1, cylinder body; 2, mixing drum; 3, feed pipe; 4, mixing mechanism; 401, motor; 402, mixing rod; 4021, conduit one; 4022, horizontal pipe; 4023, conduit two; 4024, mixing pipe; 5, intake pipe; 6, exhaust pipe; 7, heat exchange box; 8, outlet pipe; 9, shaft seal; 10, controller. Detailed Description of the Preferred Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0025] Please refer to Figures 1 to 4 , in the present utility model: A high-efficiency methyl methacrylate esterification reactor includes a cylinder body 1. The inner wall of the cylinder body 1 is fixedly connected with a mixing drum 2 through four fixing blocks. Two feed pipes 3 fixedly connected thereto penetrate through the top of the cylinder body 1. The bottom ends of the two feed pipes 3 are both communicated with the mixing drum 2. A discharge pipe and a waste gas pipe are communicated with the right side of the mixing drum 2. The right ends of the discharge pipe and the waste gas pipe both penetrate and extend to the outside of the cylinder body 1. Valves are installed on both of the two feed pipes 3 and the discharge pipe. A mixing mechanism 4 is installed on the mixing drum 2. An intake pipe 5 communicated therewith is fixedly connected to the back of the cylinder body 1. Two exhaust pipes 6 communicated therewith penetrate through the top of the cylinder body 1. A heat exchange box 7 is arranged at the top of the cylinder body 1. The heat exchange box 7 sleeves on both of the two feed pipes 3 and the two exhaust pipes 6 and is fixedly connected thereto. The top ends of the two exhaust pipes 6 are both communicated with the heat exchange box 7. An outlet pipe 8 is communicated with the top of the heat exchange box 7; The mixing mechanism 4 includes a motor 401. The bottom of the motor 401 is fixedly connected with the cylinder body 1. The output shaft of the motor 401 is fixedly connected with a mixing rod 402. The bottom end of the mixing rod 402 penetrates through the cylinder body 1 and is inserted into the mixing drum 2.

[0026] In the present utility model, during use, steam enters between the cylinder body 1 and the stirring cylinder 2 through the intake pipe 5. The steam heats the stirring cylinder 2, and then enters the heat exchange box 7 through the two exhaust pipes 6 and is discharged into the waste gas treatment equipment through the outlet pipe 8. After the preheating of the stirring cylinder 2 is completed, the user can add the raw materials and catalyst for the methyl methacrylate esterification reaction into the stirring cylinder 2 through the two feed pipes 3 for reaction. Since the stirring cylinder 2 is heated, the efficiency of the esterification reaction is effectively improved, and the working efficiency of the device is enhanced. Moreover, after the raw materials and catalyst are added into the stirring cylinder 2, the user starts the motor 401 to drive the stirring rod 402 to rotate, which can mix the raw materials and catalyst, further improving the reaction efficiency and the practicability of the device.

[0027] During the process of the raw materials and catalyst entering the stirring cylinder 2, the raw materials are located inside the heat exchange box 7, and the waste heat of the steam heats the raw materials and catalyst, achieving the effect of preheating the raw materials and catalyst, thereby increasing the reaction rate. And preheating can help the raw materials mix better. Especially in a continuous flow reaction system, preheating can ensure that the raw materials reach the reaction temperature before entering the reaction zone, thus reducing the temperature gradient in the reactor and improving the practicability of the device.

[0028] Please refer to Figures 1 to 4 , wherein: the stirring rod 402 includes a first conduit 4021. The top end of the first conduit 4021 is fixedly connected to the output shaft of the motor 401. The bottom end of the first conduit 4021 sequentially penetrates through the cylinder body 1 and the stirring cylinder 2 and extends into the interior of the stirring cylinder 2. Two cross pipes 4022 are communicated with the top end of the first conduit 4021. Two stirring pipes 4024 are communicated with the bottom end of the first conduit 4021. A second conduit 4023 rotatably connected to the stirring cylinder 2 is inserted through the bottom of the stirring cylinder 2. The top ends of the second conduits 4023 are respectively communicated with the two stirring pipes 4024.

[0029] In the present utility model, the first conduit 4021, the second conduit 4023 and the stirring pipes 4024 form a stirring member for mixing the raw materials and catalyst, and the second conduits 4023 and the stirring pipes 4024 are all hollow. During the process of the steam entering the interior of the cylinder body 1, a part of the steam also enters the interior of the second conduit 4023. The steam sequentially enters the stirring pipes 4024 and the first conduit 4021 and is discharged from the cross pipes 4022. During this process, the steam heats the stirring rod 402, so that the stirring rod 402 can also play a role in heating the raw materials and catalyst, thereby improving the reaction efficiency of the device.

[0030] Please refer to Figure 4 , wherein: shaft seals 9 are installed at both the top and bottom of the stirring cylinder 2, and the two shaft seals 9 are respectively installed on the first conduit 4021 and the second conduit 4023.

[0031] In the present utility model, the shaft seal 9 can improve the sealing effect between the first conduit 4021, the second conduit 4023 and the mixing drum 2, thereby enhancing the practicability of the device.

[0032] Please refer to Figure 1 With 2 , wherein: A controller 10 for controlling the opening and closing of the motor 401 is installed on the front surface of the cylinder body 1.

[0033] In the present utility model, the setting of the controller 10 can facilitate the user to control the motor 401, thereby enhancing the practicability of the device.

[0034] The above is only the preferred specific embodiment of the present utility model; however, the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and its improvement concept of the present utility model, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present utility model.

Claims

1. A high-efficiency esterification reactor for methyl methacrylate, comprising a cylinder body (1), characterized in that: The inner wall of the cylinder body (1) is fixedly connected with a mixing cylinder (2) through four fixing blocks. Two feed pipes (3) fixedly connected to the cylinder body (1) are inserted through the top of the cylinder body (1). The bottoms of the two feed pipes (3) are both communicated with the mixing cylinder (2). A discharge pipe and an exhaust pipe are communicated with the right side of the mixing cylinder (2). The right ends of the discharge pipe and the exhaust pipe both penetrate and extend to the outside of the cylinder body (1). Valves are installed on the two feed pipes (3) and the discharge pipe. A stirring mechanism (4) is installed on the mixing cylinder (2). An air inlet pipe (5) communicated with the cylinder body (1) is fixedly connected to the back of the cylinder body (1). Two exhaust pipes (6) communicated with the cylinder body (1) are inserted through the top of the cylinder body (1). A heat exchange box (7) is arranged on the top of the cylinder body (1). The heat exchange box (7) is respectively sleeved on the two feed pipes (3) and the two exhaust pipes (6) and fixedly connected to them. The top ends of the two exhaust pipes (6) are both communicated with the heat exchange box (7). An air outlet pipe (8) is communicated with the top of the heat exchange box (7).

2. The high-efficiency esterification reactor for methyl methacrylate according to claim 1, wherein: The stirring mechanism (4) includes a motor (401). The bottom of the motor (401) is fixedly connected to the cylinder body (1). The output shaft of the motor (401) is fixedly connected with a stirring rod (402). The bottom end of the stirring rod (402) penetrates the cylinder body (1) and is inserted into the mixing cylinder (2).

3. The highly efficient methyl methacrylate esterification reactor according to claim 2, wherein: The stirring rod (402) includes a first conduit (4021). The top end of the first conduit (4021) is fixedly connected to the output shaft of the motor (401). The bottom end of the first conduit (4021) sequentially penetrates the cylinder body (1) and the mixing cylinder (2) and extends into the interior of the mixing cylinder (2). Two horizontal pipes (4022) are communicated with the top end of the first conduit (4021). Two stirring pipes (4024) are communicated with the bottom end of the first conduit (4021). A second conduit (4023) rotatably connected to the mixing cylinder (2) is inserted through the bottom of the mixing cylinder (2). The top ends of the second conduit (4023) are respectively communicated with the two stirring pipes (4024).

4. The highly efficient methyl methacrylate esterification reactor according to claim 3, characterized in that: Shaft seals (9) are installed on both the top and the bottom of the mixing cylinder (2). The two shaft seals (9) are respectively installed on the first conduit (4021) and the second conduit (4023).

5. The highly efficient esterification reactor for methyl methacrylate according to claim 2, characterized in that: A controller (10) for controlling the opening and closing of the motor (401) is installed on the front of the cylinder body (1).

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