A system for treating a normal propyl acetate feedstock

Abstract

The utility model discloses a kind of n-propyl acetate base material processing systems, including first reaction kettle, first reaction kettle is equipped with first heating jacket, first reaction kettle lower end is connected to second reaction kettle, second reaction kettle is equipped with second heating jacket, second heating jacket is connected to steam generator, second heating jacket is also connected to first heating jacket, first reaction kettle upper end is connected to first condensing structure, second reaction kettle upper end is connected to second condensing structure, the heat exchange water of first condensing structure, second condensing structure is connected to water storage tank.The utility model, by using heating distillation to the n-propyl acetate in base material, ethanoic acid is separated and handled, then sulfuric acid is placed in second reaction kettle bottom, overallly through twice different temperature heating to n-propyl acetate, ethanoic acid, sulfuric acid realizes separation, ensure separation effect and efficiency;Condensed water after heat exchange can be used for the production of steam, also indirectly saves energy.

Description

Technical Field

[0001] This utility model relates to the field of n-propyl acetate production technology, specifically to a n-propyl acetate base material treatment system. Background Technology

[0002] A Chinese invention patent application with application number 202010731539.X discloses a process for treating n-propyl acetate base material. It involves adding acetic acid to the n-propyl acetate base material and heating it in a cyclic manner to separate sulfuric acid. However, in the above-mentioned process, the addition of acetic acid and its mixing with n-propyl acetate still require further separation, which increases the number of steps and wastes energy. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing a high-efficiency treatment system for the separation of n-propyl acetate substrate.

[0004] To achieve the above objectives, this utility model provides a n-propyl acetate substrate treatment system, which adopts the following technical solution: A propyl acetate bottom material treatment system includes a first reactor, a first heating jacket outside the first reactor, a second reactor connected to the lower end of the first reactor, a second heating jacket outside the second reactor, the second heating jacket connected to a steam generator, and the second heating jacket also connected to the first heating jacket. The upper end of the first reactor is connected to a first condensing structure, and the upper end of the second reactor is connected to a second condensing structure. The heat exchange water of the first condensing structure and the second condensing structure is connected to a water storage tank, which is used to supply water to the steam generator.

[0005] A further improvement of the n-propyl acetate base material treatment system of this utility model is that the second heating jacket is connected to the first heating jacket through a connecting pipe. The connecting pipe is provided with a heat exchange structure and a thermometer is provided on the connecting pipe. The thermometer is located between the second heating jacket and the heat exchange structure and is close to the second heating jacket.

[0006] A further improvement of the n-propyl acetate base material treatment system of this utility model is that the steam generator is connected to the connecting pipe through an auxiliary pipe, and the auxiliary pipe and the connecting pipe are connected between the heat exchange structure and the thermometer.

[0007] A further improvement of the n-propyl acetate base material treatment system of this utility model is that a drain pipe is provided below both the second heating jacket and the first heating jacket.

[0008] Compared with the prior art, the beneficial effects of this utility model are: This invention treats the bottom material in the production process of n-propyl acetate. It separates n-propyl acetate and acetic acid in the bottom material by heating and distillation. Then, sulfuric acid is placed at the bottom of the second reaction vessel. The separation of n-propyl acetate, acetic acid and sulfuric acid is achieved by heating at two different temperatures, which ensures the separation effect and efficiency. The water after condensation and heat exchange can be used for steam production, which also indirectly saves energy. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the structure of this utility model; In the figure: 1 First reactor, 2 First heating jacket, 3 Second reactor, 4 Second heating jacket, 5 First condensing structure, 6 Second condensing structure, 7 Steam generator, 8 Heat exchange structure, 9 Thermometer, 10 Auxiliary pipe, 11 Discharge pipe, 13 Connecting pipe. Detailed Implementation

[0010] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0011] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0012] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0014] like Figure 1As shown, a n-propyl acetate bottom material treatment system includes a first reaction vessel 1, a first heating jacket 2 outside the first reaction vessel, a second reaction vessel 3 connected to the lower end of the first reaction vessel, a second heating jacket 4 outside the second reaction vessel, a steam generator 7 connected to the second heating jacket, and the second heating jacket also connected to the first heating jacket. The upper end of the first reaction vessel is connected to a first condensing structure 5, and the upper end of the second reaction vessel is connected to a second condensing structure 6. The heat exchange water of the first condensing structure and the second condensing structure is connected to a water storage tank, which is used to supply water to the steam generator.

[0015] Furthermore, the second heating jacket is connected to the first heating jacket via a connecting pipe 13. The connecting pipe is equipped with a heat exchange structure, which can be a heat exchange chamber. Cold water flows within the heat exchange chamber and contacts the wall of the connecting pipe to achieve heat exchange. This pipe can be made of a material with good thermal conductivity. A thermometer 9 is installed on the connecting pipe, located between the second heating jacket and the heat exchange structure, and close to the second heating jacket. A second thermometer can also be installed on the side of the heat exchange structure away from the thermometer to monitor the temperature after heat exchange.

[0016] The steam generator is connected to the connecting pipe via an auxiliary pipe 10, which connects the heat exchange structure and the thermometer. The connecting pipe also has a discharge pipe 11, located between the auxiliary pipe and the thermometer. The auxiliary pipe is designed for adjustment when the steam temperature in the connecting pipe is insufficient. Multiple control valves can be designed on each of the connecting pipe, auxiliary pipe, and discharge pipe.

[0017] Drainage pipes are provided below both the second heating jacket and the first heating jacket.

[0018] The working principle of this invention is as follows: The raw materials from the propyl acetate production process enter the first reaction vessel. These materials include acetic acid, propyl acetate, and sulfuric acid. The first reaction vessel is heated. Since the boiling point of propyl acetate is lower than that of acetic acid and sulfuric acid, the propyl acetate gas passes through the first condensation structure to form liquid propyl acetate, which is then recovered. The materials in the first reaction vessel enter the second reaction vessel. The second reaction vessel is heated, and the acetic acid gas passes through the second condensation structure to form liquid acetic acid, which is then recovered and collected. Remaining sulfuric acid in the second reaction vessel is collected. During heating, a steam generator produces steam at approximately 120°C for heating the second reaction vessel. The flowing steam is cooled to approximately 105°C for heating the first reaction vessel. If the flowing steam is below 100°C, it is discharged through a discharge pipe. The steam generator directly supplies steam, and a heat exchange structure is used for cooling. Multiple heat exchange structures can be installed and adjusted as needed.

[0019] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A n-propyl acetate substrate treatment system, characterized in that: The system includes a first reactor, an outer heating jacket, a lower end of which is connected to a second reactor, an outer heating jacket of which is connected to a steam generator, and a second heating jacket that is also connected to the first heating jacket. The upper end of the first reactor is connected to a first condensing structure, and the upper end of the second reactor is connected to a second condensing structure. The heat exchange water for the first and second condensing structures is connected to a water storage tank, which supplies water to the steam generator.

2. The n-propyl acetate substrate treatment system according to claim 1, characterized in that: The second heating jacket is connected to the first heating jacket via a connecting pipe. The connecting pipe is equipped with a heat exchange structure and a thermometer, which is located between the second heating jacket and the heat exchange structure and is close to the second heating jacket.

3. The n-propyl acetate substrate treatment system according to claim 2, characterized in that: The steam generator is connected to the connecting pipe via an auxiliary pipe. The auxiliary pipe and the connecting pipe are connected between the heat exchange structure and the thermometer. The connecting pipe is also provided with a discharge pipe, which is located between the auxiliary pipe and the thermometer.

4. The n-propyl acetate substrate treatment system according to claim 3, characterized in that: Both the second heating jacket and the first heating jacket are equipped with drainage pipes below them.

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