N-butyl acetate purification device

Abstract

The utility model discloses an n-butyl acetate purification device which comprises a filtering device and a rectification device, the filtering device comprises a filtering box, an upper fixing frame and a lower fixing frame which are vertically arranged are arranged in the filtering box, an adsorption column is arranged on the upper fixing frame, a drying column is arranged on the lower fixing frame, and the adsorption column is communicated with the drying column. The lower end of the drying column is connected to a rectification device which comprises a rectification tower. According to the utility model, butyl acetate is absorbed, filtered and dried, and then is rectified, so that the purification effect of butyl acetate is ensured; meanwhile, cooling of the gas at the upper end of the rectifying tower is achieved through heat exchange of cold water and butyl acetate, the cold water is used for preheating the butyl acetate after heat exchange, the butyl acetate is subjected to heat exchange to increase the initial temperature, and energy consumed for preheating is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of butyl acetate production equipment, and particularly relates to a purification device for n-butyl acetate. Background Art

[0002] n-Butyl acetate is an excellent organic solvent. The butyl acetate reagent sold on the market is generally used in industry. In the field of scientific experiments, the n-butyl acetate on the market still needs to be further purified. The existing purification equipment generally includes a distillation column, and the n-butyl acetate is purified in the distillation column. However, simple distillation has the problem of low purification effect. At the same time, there is also a problem of inefficient energy utilization and energy waste in its conventional distillation process. Content of the Utility Model

[0003] The purpose of the utility model is to provide a purification device for n-butyl acetate with good purification effect and relatively energy-saving in view of the deficiencies in the above background art.

[0004] To achieve the above purpose, a purification device for n-butyl acetate of the utility model adopts the following technical scheme:

[0005] A purification device for n-butyl acetate includes a filtering device and a distillation device. The filtering device includes a filtering box, in which an upper fixing frame and a lower fixing frame are arranged separately up and down. An adsorption column is arranged on the upper fixing frame, a drying column is arranged on the lower fixing frame, the adsorption column and the drying column are communicated with each other, the lower end of the drying column is connected to the distillation device, and the distillation device includes a distillation column.

[0006] A further improvement of the purification device for n-butyl acetate of the utility model is that a preheating device is further arranged between the distillation column and the drying column. The preheating device includes a preheating tank, a sandwich is arranged outside the preheating tank, and a heating structure is arranged in the sandwich.

[0007] A further improvement of the purification device for n-butyl acetate of the utility model is that a cooling structure is further arranged above the distillation column. The cooling structure includes a fixed pipe, an outer cavity is arranged outside the fixed pipe, a cold water inlet and a cold water outlet are arranged on the outer cavity, the cold water outlet is connected to the sandwich, a discharge port is further arranged on the fixed pipe, the discharge port is connected to a discharge pipe, and a reflux pipe is arranged on the discharge pipe and the reflux pipe is connected to the distillation column.

[0008] A further improvement of the purification device for n-butyl acetate of the utility model is that an inner cavity is further arranged inside the fixed pipe. The upper end of the inner cavity is connected to the lower end of the drying column, and the lower end of the inner cavity is connected to the preheating tank.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model absorbs, filters and dries butyl acetate, and then rectifies it to ensure the purification effect of butyl acetate; meanwhile, when cooling the gas at the upper end of the rectification column, it is achieved by heat exchange between cold water and butyl acetate. The cold water after heat exchange is used to preheat butyl acetate and heat exchange butyl acetate to increase its initial temperature, saving the energy consumed for preheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the utility model;

[0012] In the figure: 1 filtration box, 2 upper fixing frame, 3 lower fixing frame, 4 connecting pipe, 5 preheating tank, 6 interlayer, 7 rectification column, 7 fixing pipe, 9 outer cavity, 10 inner cavity, 11 discharge pipe, 12 reflux pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0014] As Figure 1 shown, a purification device for n-butyl acetate includes a filtration device and a rectification device. The filtration device includes a filtration box 1. An upper fixing frame 2 and a lower fixing frame 3 are arranged up and down in the filtration box. An adsorption column is arranged on the upper fixing frame, and a drying column is arranged on the lower fixing frame. The adsorption column and the drying column are connected by a connecting pipe 4. The number of adsorption columns and drying columns is the same and they correspond one by one. The adsorption column is filled with an adsorbent, and the adsorbent can be activated carbon or activated alumina. The drying column is filled with a desiccant, and the desiccant can be magnesium sulfate. The lower end of the drying column is connected to the rectification device, and the rectification device includes a rectification column 7. An inlet pipe can be arranged at the upper end of the adsorption column, and there are branch pipes on the inlet pipe corresponding to the adsorption columns. The lower ends of the drying columns can also be commonly connected to a blanking pipe, and the blanking pipe is connected to the rectification column.

[0015] Furthermore, a preheating device is also arranged between the rectification column and the drying column. The preheating device includes a preheating tank 5, and an interlayer 6 is arranged outside the preheating tank. A heating structure is arranged in the interlayer. The butyl acetate after filtration and drying is preheated to improve the rectification efficiency in the rectification column.

[0016] Furthermore, a cooling structure is provided above the rectifying column. The cooling structure includes a fixed tube 7. An outer cavity 9 is provided outside the fixed tube. A cold water inlet and a cold water outlet are provided on the outer cavity. The cold water outlet is connected to the interlayer. An outlet is also provided on the fixed tube. The outlet is connected to an outlet pipe 11. A reflux pipe 12 is further provided on the outlet pipe. The reflux pipe is connected to the rectifying column. Preferably, the inner cavity, the fixed tube, and the outer cavity are concentrically arranged and relatively independently sealed. The inner cavity and the fixed tube are preferably made of heat-conducting materials.

[0017] Furthermore, an inner cavity 10 is also provided inside the fixed tube. The upper end of the inner cavity is connected to the lower end of the drying column, specifically connected to the blanking pipe, and the lower end of the inner cavity is connected to the preheating tank. Valves can be provided on each of the above connecting pipes.

[0018] The working principle of the present utility model is as follows: n-butyl acetate enters the filtering box, first undergoes adsorption and impurity removal, then drying, and then enters the preheating tank for preheating, and then goes to the rectifying column for further purification. The gas at the upper end of the rectifying column is cooled, and part of it is refluxed, and part is the purified n-butyl acetate. When cooling, it is jointly achieved by cold water and n-butyl acetate before preheating.

[0019] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A n-butyl acetate purification device, characterized in that: It comprises a filtering device and a distillation device, wherein the filtering device comprises a filtering box, wherein an upper fixed frame and a lower fixed frame are arranged in the filtering box, an adsorption column is arranged on the upper fixed frame, and a drying column is arranged on the lower fixed frame, wherein the adsorption column is connected to the drying column, and the lower end of the drying column is connected to the distillation device, and the distillation device comprises a distillation tower.

2. A n-butyl acetate purification device according to claim 1, characterized in that: A preheating device is also provided between the distillation tower and the drying column. The preheating device comprises a preheating tank. An interlayer is provided on the outer side of the preheating tank. A heating structure is provided inside the interlayer.

3. A n-butyl acetate purification device according to claim 2, characterized in that: A cooling structure is also provided above the distillation tower, and the cooling structure includes a fixed pipe, an outer cavity is provided outside the fixed pipe, a cold water inlet and a cold water outlet are provided on the outer cavity, the cold water outlet is connected to the interlayer, a discharge port is also provided on the fixed pipe, the discharge port is connected to the discharge pipe, a reflux pipe is also provided on the discharge pipe, and the reflux pipe is connected to the distillation tower.

4. A n-butyl acetate purification device according to claim 3, characterized in that: An inner cavity is also provided inside the fixed tube, the upper end of the inner cavity is connected to the lower end of the drying column, and the lower end of the inner cavity is connected to the preheating tank.

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