Continuous washing equipment for methyl phenylacetate production

Abstract

The utility model discloses continuous washing equipment for methyl phenylacetate production, which comprises a barrel shell, a first washing tank, a second washing tank and a third washing tank, the first washing tank, the second washing tank and the third washing tank are sequentially arranged in the barrel shell, the bottom end of the first washing tank is connected with the top end of the second washing tank through an electric valve, and the bottom end of the third washing tank is connected with the top end of the third washing tank. The bottom end of the second washing tank is connected with the top end of the third washing tank; through grooves are formed in the positions, located at the joint of the first washing tank and the second washing tank, of the barrel shell, the joint of the second washing tank and the third washing tank and the bottom of the third washing tank, of the barrel shell. Flow of the adjacent washing tanks can be achieved through gravity, a lifting pump does not need to be installed for conveying a solution, the cost is saved, meanwhile, the first washing tank, the second washing tank and the third washing tank are reasonably installed in the barrel shell, and the occupied space is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of washing equipment for methyl phenylacetate production, in particular to a continuous washing equipment for methyl phenylacetate production. Background Technique

[0002] Methyl phenylacetate, also known as methyl α-toluylate, naturally exists in cocoa, coffee and strawberries. It is a colorless to light yellow oily liquid with a weak honey and musk-like aroma and a slightly sweet taste. It can be used as a fragrance in cosmetics, washing products, soaps and indoor fresheners, and for preparing tobacco flavor; it can also be used to prepare flavors such as honey and chocolate for food, and can also be used in pharmaceuticals and organic synthesis intermediates.

[0003] During the production process of methyl phenylacetate, after the esterification reaction of phenylacetic acid, sodium bisulfate and methanol, methanol is recovered, methanol is supplemented, and then methanol is recovered again. Then, it needs to be washed three times with water, washing with alkaline brine and brine. At present, most of them are completed by a single washing kettle, and the efficiency is low. At present, there are also continuous washing equipment, which uses three washing tanks to wash in sequence, and the efficiency has been improved. However, at present, the three washing tanks of the continuous washing equipment are horizontally installed on a base or bracket, occupying a large space, and the solution is transported between the two washing tanks through a lift pump between the three washing tanks, resulting in an increase in equipment cost. Therefore, an improved technology is urgently needed to solve this problem existing in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a continuous washing equipment for methyl phenylacetate production. Through the first washing tank, the second washing tank and the third washing tank connected longitudinally in sequence, continuous washing in the production process of methyl phenylacetate can be realized, and the washing efficiency is greatly improved. And because it is longitudinally arranged, the flow between adjacent washing tanks can be realized by gravity, and there is no need to install a lift pump for solution transportation, saving the investment cost and use cost of the equipment. At the same time, the first washing tank, the second washing tank and the third washing tank are reasonably installed in the cylindrical shell, saving floor space, so as to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A continuous washing equipment for methyl phenylacetate production, including a cylindrical shell, a first washing tank, a second washing tank and a third washing tank. A bottom plate is arranged at the bottom of the cylindrical shell. The first washing tank, the second washing tank and the third washing tank are sequentially arranged in the cylindrical shell. The bottom end of the first washing tank is connected to the top end of the second washing tank through an electric valve, and the bottom end of the second washing tank is connected to the top end of the third washing tank through an electric valve;

[0006] The first washing tank, the second washing tank, and the third washing tank have the same structure and each consists of a tank body, an upper cover, a lower cover, a feed inlet, a discharge outlet, a bypass interface, a washing material inlet, an exhaust port, an air inlet, and an annular air distribution pipe. The upper cover is connected to the top end of the tank body, and the lower cover is connected to the bottom end of the tank body. The feed inlet is arranged at the top end of the upper cover, and the discharge outlet is arranged at the bottom end of the lower cover. The bypass interface is arranged on the side of the discharge outlet. The washing material inlet and the exhaust port are arranged on one side of the upper cover, and the air inlet is arranged on one side of the lower cover. An annular air distribution pipe is arranged inside the lower cover, and the annular air distribution pipe is communicated with the air inlet. Air inlet holes are evenly formed on the lower surface of the annular air distribution pipe;

[0007] The electric valve includes a valve body and an electric actuator. The electric actuator is arranged on one side of the valve body. The electric actuator, the bypass interface, the washing material inlet, the exhaust port, and the air inlet are all located in the same vertical plane;

[0008] The cylindrical outer shell is provided with through grooves at the joints of the first washing tank and the second washing tank, the joints of the second washing tank and the third washing tank, and the bottom of the third washing tank. The electric actuator, the bypass interface, the washing material inlet, the exhaust port, and the air inlet are respectively located at the corresponding through grooves.

[0009] Preferably, in a continuous washing device for methyl phenylacetate production provided by the present utility model, a plurality of reinforcing plates are arranged at the connection between the bottom plate and the cylindrical outer shell.

[0010] Preferably, in a continuous washing device for methyl phenylacetate production provided by the present utility model, a support ring is arranged on the inner wall at the lower end of the cylindrical outer shell, and the bottom of the third washing tank is supported by the support ring.

[0011] Preferably, in a continuous washing device for methyl phenylacetate production provided by the present utility model, the outer diameters of the first washing tank, the second washing tank, and the third washing tank match the inner diameter of the cylindrical outer shell.

[0012] Preferably, in a continuous washing device for methyl phenylacetate production provided by the present utility model, the outer ends of the bypass interface, the washing material inlet, the exhaust port, the air inlet, and the valve body do not exceed the inner wall of the cylindrical outer shell.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] Through the first washing tank, the second washing tank and the third washing tank which are longitudinally and continuously connected, continuous washing in the production process of methyl phenylacetate can be realized, and the washing efficiency is greatly improved. Moreover, due to the longitudinal arrangement, the flow between adjacent washing tanks can be achieved by gravity, and there is no need to install a lifting pump for the transportation of the solution, saving the equipment input cost and usage cost. The first washing tank, the second washing tank and the third washing tank are reasonably installed in the cylindrical shell, which can protect the first washing tank, the second washing tank and the third washing tank, and save the floor space. In addition, the electric actuator, the bypass interface, the washing material inlet, the exhaust port and the air inlet are all located in the same vertical plane, and several through grooves are opened on one side of the cylindrical shell, which does not affect the external pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic side sectional structure view of the present utility model;

[0016] Figure 2 is a schematic front sectional structure view of the present utility model;

[0017] Figure 3 is a schematic front external structure view of the present utility model;

[0018] Figure 4 is an enlarged structure view of the marked position A in the attached Figure 1 drawing;

[0019] Figure 5 is an enlarged structure view of the marked position B in the attached Figure 1 drawing;

[0020] Figure 6 is a schematic view of the structure of the first washing tank (the structures of the second washing tank and the third washing tank are the same as that of the first washing tank);

[0021] Figure 7 is a schematic bottom view structure view of the annular air distribution pipe.

[0022] In the figure: cylindrical shell 1, first washing tank 2, second washing tank 3, third washing tank 4, bottom plate 5, tank body 6, upper cover 7, lower cover 8, feed inlet 9, discharge outlet 10, bypass interface 11, washing material inlet 12, exhaust port 13, air inlet 14, annular air distribution pipe 15, air inlet hole 16, valve body 17, electric actuator 18, through groove 19, reinforcing plate 20, support ring 21. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model;

[0024] It should be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0025] Please refer to Figures 1-6 , the present utility model provides a technical solution: a continuous washing device for the production of methyl phenylacetate, including a cylindrical outer shell 1, a first washing tank 2, a second washing tank 3, and a third washing tank 4. A bottom plate 5 is provided at the bottom of the cylindrical outer shell 1. A plurality of reinforcing plates 20 are provided at the connection between the bottom plate 5 and the cylindrical outer shell 1 to ensure the support strength of the bottom of the cylindrical outer shell 1. The first washing tank 2, the second washing tank 3, and the third washing tank 4 are sequentially arranged inside the cylindrical outer shell 1. The bottom end of the first washing tank 2 is connected to the top end of the second washing tank 3 through an electric valve, and the bottom end of the second washing tank 3 is connected to the top end of the third washing tank 4 through an electric valve. A support ring 21 is provided on the inner wall of the lower end of the cylindrical outer shell 1. The bottom of the third washing tank 4 is supported on the support ring 21 to achieve the support of the bottommost third washing tank 4, thereby realizing the support of the three washing tanks inside the cylindrical outer shell 1. The outer diameters of the first washing tank 2, the second washing tank 3, and the third washing tank 4 match the inner diameter of the cylindrical outer shell 1 to ensure the stability of the first washing tank 2, the second washing tank 3, and the third washing tank 4 inside the cylindrical outer shell 1;

[0026] The first washing tank 2, the second washing tank 3, and the third washing tank 4 have the same structure and each consists of a tank body 6, an upper cover 7, a lower cover 8, a feed inlet 9, a discharge outlet 10, a bypass interface 11, a washing material inlet 12, an exhaust port 13, an air inlet 14, and an annular air distribution pipe 15. The upper cover 7 is connected to the top end of the tank body 6, and the lower cover 8 is connected to the bottom end of the tank body 6. The feed inlet 9 is provided at the top end of the upper cover 7, and the discharge outlet 10 is provided at the bottom end of the lower cover 8. The bypass interface 11 is provided on the side of the discharge outlet 10. The washing material inlet 12 and the exhaust port 13 are provided on one side of the upper cover 7, and the air inlet 14 is provided on one side of the lower cover 8. An annular air distribution pipe 15 is provided inside the lower cover 8. The annular air distribution pipe 15 is in communication with the air inlet 14, and air inlet holes 16 are evenly opened on the lower surface of the annular air distribution pipe 15;

[0027] The electric valve includes a valve body 17 and an electric actuator 18. The electric actuator 18 is arranged on one side of the valve body 17. The electric actuator 18, the bypass interface 11, the washing material inlet 12, the exhaust port 13 and the air inlet 14 are all located in the same vertical plane. The outer ends of the bypass interface 11, the washing material inlet 12, the exhaust port 13, the air inlet 14 and the valve body 17 do not exceed the inner wall of the cylinder shell 1, so as to ensure that the first washing tank 2, the second washing tank 3 and the third washing tank 4 can all be smoothly inserted into the cylinder shell 1;

[0028] The cylinder shell 1 is provided with through grooves 19 at the joints of the first washing tank 2 and the second washing tank 3, at the joints of the second washing tank 3 and the third washing tank 4, and at the bottom of the third washing tank 4. The electric actuator 18, the bypass interface 11, the washing material inlet 12, the exhaust port 13 and the air inlet 14 are respectively located at the corresponding through grooves 19.

[0029] Installation method and operating principle: First, insert the third washing tank 4 into the cylindrical shell 1, and support the bottom of the third washing tank 4 on the upper surface of the support ring 21. Then, connect the valve body 17 of one of the electric valves to the feed port 9 at the top of the third washing tank 4. Next, insert the second washing tank 3 into the cylindrical shell 1, connect the discharge port 10 at the bottom of the second washing tank 3 to the valve body 17 of the first electric valve, and at the same time connect the valve body 17 of the other electric valve to the feed port 9 at the top of the second washing tank 3. Then, insert the first washing tank 2 into the cylindrical shell 1, and connect the discharge port 10 at the bottom of the first washing tank 2 to the valve body 17 of the second electric valve. Finally, install the electric actuator 18 of the electric valve at the outer end of the corresponding valve body 17 to complete the installation. Before use, connect the pipes. The bypass interface 11 of the first washing tank 2 is connected to the waste acid transfer tank, the bypass interface 11 of the second washing tank 3 is connected to the alkaline brine intermediate tank, and the bypass interface 11 of the third washing tank 4 is connected to the brine intermediate tank. The washing material inlet 12 of the first washing tank 2 is connected to the water tank, the washing material inlet 12 of the second washing tank 3 is connected to the alkaline brine tank, and the washing material inlet 12 of the third washing tank 4 is connected to the brine tank. The air inlets 14 of the first washing tank 2, the second washing tank 3, and the third washing tank 4 are respectively connected to the air pump, and the exhaust ports 13 are connected to the exhaust pipe. During use, after the esterification reaction of phenylacetic acid, sodium bisulfate, and methanol, after recovering methanol twice and supplementing methanol once, it enters the first washing tank 2. Water is sent into the first washing tank 2 from the washing material inlet 12 of the first washing tank 2, air enters from the air inlet 14, and the solution in the first washing tank 2 is tumbled by the gas to achieve washing. After the water washing is completed, it is left to stand. After stratification, the waste acid is discharged to the waste acid transfer tank through the bypass interface 11 of the first washing tank 2. Then, open the electric valve between the first washing tank 2 and the second washing tank 3; the solution flows into the second washing tank 3. Alkaline brine is sent into the second washing tank 3 from the washing material inlet 12 of the second washing tank 3, air enters from the air inlet 14, and the solution in the second washing tank 3 is tumbled by the gas to achieve washing. After the alkaline brine washing is completed, it is left to stand. After stratification, the alkaline brine is discharged to the alkaline brine intermediate tank through the bypass interface 11 of the second washing tank 3. Then, open the electric valve between the second washing tank 3 and the third washing tank 4; the solution flows into the third washing tank 4. Brine is sent into the third washing tank 4 from the washing material inlet 12 of the third washing tank 4, air enters from the air inlet 14, and the solution in the third washing tank 4 is tumbled by the gas to achieve washing. After the brine washing is completed, it is left to stand. After stratification, the brine is discharged to the brine intermediate tank through the bypass interface 11 of the third washing tank 4, and finally discharged from the discharge port 10 at the bottom of the third washing tank 4 to obtain the crude product of methyl phenylacetate.The structure of the utility model is reasonable. Through the first washing tank 2, the second washing tank 3 and the third washing tank 4 which are longitudinally and continuously connected, continuous washing in the production process of methyl phenylacetate can be realized, and the washing efficiency is greatly improved. Moreover, due to the longitudinal arrangement, the flow between adjacent washing tanks can be achieved by gravity, and there is no need to install a lift pump for the transportation of the solution, saving the equipment investment cost and the use cost. The first washing tank 2, the second washing tank 3 and the third washing tank 4 are reasonably installed in the cylindrical shell 1. One is to protect the first washing tank 2, the second washing tank 3 and the third washing tank 4, and the other is to save the floor space. And the electric actuator 18, the bypass interface 11, the washing material inlet 12, the exhaust port 13 and the air inlet 14 are all located in the same vertical plane, and a plurality of through grooves 19 are arranged on one side of the cylindrical shell 1, which does not affect the external pipeline.

[0030] Where the utility model is not described in detail is the well-known technology of those skilled in the art.

[0031] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the utility model rather than to limit them. Although the utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that the technical solutions of the utility model can be modified and equivalently replaced without departing from the spirit and scope of the technical solutions of the utility model, and they should all be covered by the scope of the claims of the utility model.

Claims

1. A continuous washing device for producing methyl phenylacetate, characterized in that: The invention comprises a cylinder shell (1), a first washing tank (2), a second washing tank (3) and a third washing tank (4); a bottom plate (5) is arranged at the bottom of the cylinder shell (1); the first washing tank (2), the second washing tank (3) and the third washing tank (4) are arranged in sequence in the cylinder shell (1); the bottom end of the first washing tank (2) is connected to the top end of the second washing tank (3) through an electric valve; and the bottom end of the second washing tank (3) is connected to the top end of the third washing tank (4) through an electric valve; The first washing tank (2), the second washing tank (3) and the third washing tank (4) have the same structure and are all composed of a tank body (6), an upper cover (7), a lower cover (8), a feed port (9), a discharge port (10), a bypass interface (11), a washing material inlet (12), an exhaust port (13), an air inlet (14) and an annular air distribution pipe (15). The top end of the tank body (6) is connected to the upper cover (7), the bottom end of the tank body (6) is connected to the lower cover (8), and the top end of the upper cover (7) is provided with a feed port (9). The bottom end of the lower cover (8) is provided with a discharge port (10), the side of the discharge port (10) is provided with a bypass interface (11), one side of the upper cover (7) is provided with a washing material inlet (12) and an exhaust port (13), one side of the lower cover (8) is provided with an air inlet (14), an annular air distribution pipe (15) is provided inside the lower cover (8), the annular air distribution pipe (15) and the air inlet (14) are communicated with each other, and the lower surface of the annular air distribution pipe (15) is evenly provided with air inlet holes (16); The electric valve comprises a valve body (17) and an electric actuator (18), wherein the electric actuator (18) is arranged on one side of the valve body (17), and the electric actuator (18), the bypass interface (11), the washing material inlet (12), the exhaust port (13) and the air inlet (14) are all located in the same vertical plane; The cylinder shell (1) is provided with through grooves (19) at the connection between the first washing tank (2) and the second washing tank (3), at the connection between the second washing tank (3) and the third washing tank (4), and at the bottom of the third washing tank (4); the electric actuator (18), the bypass interface (11), the washing material inlet (12), the exhaust port (13) and the air inlet (14) are respectively located at the corresponding through grooves (19).

2. The continuous washing equipment for producing methyl phenylacetate according to claim 1, characterized in that: A plurality of reinforcing plates (20) are provided at the connection between the bottom plate (5) and the cylinder shell (1).

3. The continuous washing equipment for producing methyl phenylacetate according to claim 1, characterized in that: The inner wall of the lower end of the cylinder shell (1) is provided with a support ring (21), and the bottom of the third washing tank (4) is supported by the support ring (21).

4. The continuous washing equipment for producing methyl phenylacetate according to claim 1, characterized in that: The outer diameters of the first washing tank (2), the second washing tank (3) and the third washing tank (4) match the inner diameter of the cylinder shell (1).

5. The continuous washing equipment for producing methyl phenylacetate according to claim 1, characterized in that: The outer ends of the bypass interface (11), the washing material inlet (12), the exhaust port (13), the air inlet (14) and the valve body (17) do not extend beyond the inner wall of the cylinder shell (1).

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