Salicylic acid distillation and purification device

Abstract

The utility model relates to the technical field of salicylic acid, in particular to a salicylic acid distillation and purification device. The salicylic acid distillation and purification device comprises a distillation assembly and a preheating assembly, the distillation assembly comprises a heater, a distillation tank, a stirring motor, a connecting rod and a plurality of stirring rods; the salicylic acid raw material in the distillation tank is heated by the heater for distillation and purification, and the stirring motor drives the connecting rod to rotate so as to drive the stirring rod to stir the salicylic acid raw material, so that the heating is more uniform; the preheating assembly comprises a preheating tank, a raw material tank, an air pump, a connecting pipe and a plurality of heat conducting pieces, distillation gas generated in the distillation tank is pumped into a preheating area of the preheating tank through the air pump and the connecting pipe, heat of the distillation gas is conducted into the raw material tank through the heat conducting pieces, salicylic acid raw materials in the raw material tank are subjected to waste heat treatment, and waste heat of the distillation gas is fully utilized; and energy is saved.

Description

Technical Field

[0001] This utility model relates to the field of salicylic acid technology, specifically to a salicylic acid distillation and purification device. Background Technology

[0002] Salicylic acid is a fat-soluble organic acid, a white crystalline powder found in nature, such as willow bark, white pearl leaves, and sweet birch. It is an important fine chemical raw material used in the preparation of drugs such as aspirin. However, salicylic acid requires distillation and crystallization for purification during production to improve its quality.

[0003] For example, patent CN211302149U discloses a salicylic acid crystallization and purification device, including a base, a crystallization and purification box welded to the top of the base, a sealing cover plate snapped onto the top of the crystallization and purification box, electric heating plates embedded on both sides of the inner wall of the crystallization and purification box, a condenser embedded at the bottom of the crystallization and purification box, an air inlet and an exhaust outlet respectively opened on both sides of the crystallization and purification box, a guide plate snapped onto the inside of the crystallization and purification box, and a feed pipe welded to one side of the crystallization and purification box.

[0004] Existing salicylic acid purification devices cannot utilize the residual heat of distilled gas and suffer from uneven heating. Therefore, it is necessary to design a salicylic acid distillation purification device that can heat evenly and make full use of residual heat. Utility Model Content

[0005] The purpose of this invention is to solve at least one of the technical problems existing in the prior art and to provide a salicylic acid distillation and purification device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a salicylic acid distillation and purification device, comprising a distillation component and a preheating component;

[0007] The distillation assembly includes a heater, a distillation tank, a stirring motor, a connecting rod, and several stirring rods; the heater is located at the bottom of the distillation tank, the stirring motor is located at the top of the distillation tank, the connecting rod is vertically arranged inside the distillation tank, the stirring motor is connected to the connecting rod and is used to drive the connecting rod to rotate, and the stirring rods are evenly distributed around the connecting rod.

[0008] The preheating assembly includes a preheating tank, a raw material tank, an air pump, a connecting pipe, and several heat-conducting plates. The raw material tank contains salicylic acid raw material and is located inside the preheating tank. A preheating zone is formed between the raw material tank and the preheating tank. The top of the distillation tank is connected to the top of the preheating tank through the connecting pipe. The air pump is located on the connecting pipe. The heat-conducting plates are evenly distributed on the side wall of the raw material tank, with one end of each heat-conducting plate located inside the raw material tank and the other end located in the preheating zone.

[0009] Furthermore, the distillation tank is equipped with a pump, the inlet of which is connected to the pipeline of the raw material tank and the pipeline extends to the bottom of the raw material tank, and the outlet of which is connected to the pipeline at the top of the distillation tank.

[0010] Furthermore, the stirring rod has a hollow structure, and a heating wire is installed inside the stirring rod.

[0011] Furthermore, the bottom of the distillation tank is provided with a first outlet.

[0012] Furthermore, a first valve is installed inside the first outlet.

[0013] Furthermore, a second outlet is provided at the bottom of the preheating tank.

[0014] Furthermore, a second valve is provided inside the second outlet.

[0015] Furthermore, the top of the raw material tank is provided with a feed inlet, and the feed inlet is fitted with a top cover.

[0016] As described above, compared with the prior art, the salicylic acid distillation and purification device of this utility model includes a distillation component and a preheating component. The distillation component includes a heater, a distillation tank, a stirring motor, a connecting rod, and several stirring rods. The heater heats the salicylic acid raw material in the distillation tank for distillation and purification. The stirring motor drives the connecting rod to rotate, thereby stirring the salicylic acid raw material and making the heating more uniform. The preheating component includes a preheating tank, a raw material tank, a gas pump, a connecting pipe, and several heat-conducting plates. The distillation gas generated in the distillation tank is drawn into the preheating zone of the preheating tank through the gas pump and the connecting pipe. The heat of the distillation gas is conducted to the raw material tank through the heat-conducting plates, utilizing the residual heat of the salicylic acid raw material in the raw material tank, making full use of the residual heat of the distillation gas, and saving energy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a salicylic acid distillation and purification apparatus according to a preferred embodiment of the present invention;

[0018] The following are the labels in the diagram: 1. Distillation assembly, 2. Preheating assembly, 101. Heater, 102. Distillation tank, 103. Stirring motor, 104. Connecting rod, 105. Stirring rod, 106. Feed pump, 107. Heating wire, 108. First outlet, 109. First valve, 201. Preheating tank, 202. Raw material tank, 203. Air pump, 204. Connecting pipe, 205. Heat-conducting plate, 206. Preheating zone, 207. Second outlet, 208. Second valve, 209. Feed inlet, 210. Top cover. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figure 1 As shown in the preferred embodiment of the present invention, a salicylic acid distillation and purification device includes a distillation component 1 and a preheating component 2.

[0023] The distillation assembly 1 includes a heater 101, a distillation tank 102, a stirring motor 103, a connecting rod 104, and a plurality of stirring rods 105. The heater 101 is disposed at the bottom of the distillation tank 102, the stirring motor 103 is disposed at the top of the distillation tank 102, the connecting rod 104 is vertically disposed inside the distillation tank 102, the stirring motor 103 is connected to the connecting rod 104 and is used to drive the connecting rod 104 to rotate, and the stirring rods 105 are evenly distributed around the connecting rod 104.

[0024] The preheating assembly 2 includes a preheating tank 201, a raw material tank 202, an air pump 203, a connecting pipe 204, and several heat-conducting plates 205. The raw material tank 202 contains salicylic acid raw material and is located inside the preheating tank 201. A preheating zone 206 is formed between the raw material tank 202 and the preheating tank 201. The top of the distillation tank 102 is connected to the top of the preheating tank 201 through the connecting pipe 204. The air pump 203 is located on the connecting pipe 204. The heat-conducting plates 205 are evenly distributed on the side wall of the raw material tank 202, with one end of each heat-conducting plate 205 located inside the raw material tank 202 and the other end located inside the preheating zone 206.

[0025] The salicylic acid distillation and purification device of this utility model includes a distillation component 1 and a preheating component 2. The distillation component 1 includes a heater 101, a distillation tank 102, a stirring motor 103, a connecting rod 104, and several stirring rods 105. The heater 101 heats the salicylic acid raw material in the distillation tank 102 for distillation and purification. The stirring motor 103 drives the connecting rod 104 to rotate, thereby driving the stirring rods 105 to stir the salicylic acid raw material, making the heating more uniform. The preheating component 2 includes a preheating tank 201, a raw material tank 202, an air pump 203, a connecting pipe 204, and several heat-conducting plates 205. The distillation gas generated in the distillation tank 102 is drawn into the preheating zone 206 of the preheating tank 201 through the air pump 203 and the connecting pipe 204. The heat of the distillation gas is conducted to the raw material tank 202 through the heat-conducting plates 205, which utilizes the residual heat of the salicylic acid raw material in the raw material tank 202, making full use of the residual heat of the distillation gas and saving energy.

[0026] As a preferred embodiment of this utility model, it may also have the following additional technical features:

[0027] In this embodiment, a pump 106 is installed on the distillation tank 102. The inlet 209 of the pump 106 is connected to the raw material tank 202 via a pipeline extending to the bottom of the raw material tank 202, and the outlet of the pump 106 is connected to the top of the distillation tank 102 via a pipeline. The pump 106 draws salicylic acid raw material from the raw material tank 202 into the distillation tank 102 for distillation and purification.

[0028] In this embodiment, the stirring rod 105 has a hollow structure, and a heating wire 107 is disposed inside the stirring rod 105. By disposing of the heating wire 107 inside the stirring rod 105, the heating efficiency is improved.

[0029] In this embodiment, the bottom of the distillation tank 102 is provided with a first outlet 108, and a first valve 109 is provided inside the first outlet 108. After distillation, the material in the distillation tank 102 is discharged through the first outlet 108 and the first valve 109.

[0030] In this embodiment, a second outlet 207 is provided at the bottom of the preheating tank 201, and a second valve 208 is provided inside the second outlet 207. After distillation, the material in the preheating tank 201 is discharged through the second outlet 207 and the second valve 208.

[0031] In this embodiment, the top of the raw material tank 202 is provided with a feed inlet 209, and a top cover 210 is installed on the feed inlet 209. When it is necessary to add salicylic acid raw material to the raw material tank 202, the top cover 210 is opened, and then the salicylic acid raw material is added through the feed inlet 209.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A distillation apparatus for purifying salicylic acid, characterized by comprising: The distillation assembly (1) comprises a heater (101), a distillation tank (102), a stirring motor (103), a connecting rod (104), and a plurality of stirring rods (105). The preheating assembly (2) comprises a preheating tank (201), a raw material tank (202), an air pump (203), a connecting pipe (204), and a plurality of heat-conducting sheets (205). The distillation tank (102) is provided with a material pumping pump (106), the inlet (209) of the material pumping pump (106) is in pipeline communication with the raw material tank (202) and the pipeline extends to the bottom of the raw material tank (202), and the outlet of the material pumping pump (106) is in pipeline communication with the top of the distillation tank (102).

2. A distillation apparatus for purifying salicylic acid as claimed in claim 1, wherein, The stirring rod (105) is a hollow structure, and an electric heating wire (107) is arranged in the stirring rod (105).

3. A distillation apparatus for purifying salicylic acid as claimed in claim 1, wherein, The bottom of the distillation tank (102) is provided with a first outlet (108).

4. A distillation apparatus for purifying salicylic acid as claimed in claim 1, wherein, The first outlet (108) is provided with a first valve (109).

5. A distillation apparatus for purifying salicylic acid as claimed in claim 4, wherein, The bottom of the preheating tank (201) is provided with a second outlet (207).

6. A distillation apparatus for purifying salicylic acid as claimed in claim 1, wherein, The second outlet (207) is provided with a second valve (208).

7. A distillation apparatus for purifying salicylic acid as claimed in claim 6, wherein The top of the raw material tank (202) is provided with an inlet (209), and the inlet (209) is provided with an upper cover (210).

8. A distillation apparatus for purifying salicylic acid as claimed in claim 1, wherein, ​

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