An esterification reaction device for producing n-butyl acetate

Abstract

The utility model discloses an esterification reaction unit for n-butyl acetate production, including esterification kettle, and esterification kettle outside is equipped with heating jacket, and esterification kettle upper end is connected in esterification tower, heating jacket is connected in steam generator, esterification kettle upper end still is connected in acetic acid preheating jar, butyl alcohol preheating jar, and acetic acid preheating jar, butyl alcohol preheating jar outside all is equipped with heat exchange chamber, and heating jacket is connected in heat exchange chamber, and heat exchange chamber is connected in fixed water tank, the utility model discloses through the steam of heating esterification kettle and preheating jar contact heat exchange, preheat acetic acid, butyl alcohol in jar, reduce its reaction time in esterification kettle, improve production efficiency, on the other hand, after heat exchange, steam enters water tank, improve the temperature of water, be convenient for it for steam generator carries out steam production, whole full use of energy, improve energy efficiency.

Description

Technical Field

[0001] This utility model relates to the field of n-butyl acetate production technology, specifically to an esterification reaction apparatus for n-butyl acetate production. Background Technology

[0002] Chinese utility model patent application number 201720868266.7 discloses a production system for the esterification of n-butyl acetate. This system esterifies acetic acid and butanol in an esterification reactor. After esterification, the gas enters an esterification tower for further heating and purification. In this structure, acetic acid and butanol are directly introduced into the esterification reactor for heating, requiring their temperatures to rise from a low level, which affects reaction efficiency. Furthermore, existing technologies also include methods that preheat acetic acid and butanol before introducing them into the esterification reactor for heating. However, in such methods, a heater is generally used to preheat the acetic acid and butanol, resulting in insufficient utilization of heat in the esterification reaction system, leaving room for improvement. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing an esterification reaction apparatus that utilizes heat from the production process to preheat acetic acid and butanol, thereby improving the production efficiency of n-butyl acetate.

[0004] To achieve the above objectives, this utility model provides an esterification reaction apparatus for the production of n-butyl acetate, which adopts the following technical solution: An esterification reaction apparatus for the production of n-butyl acetate includes an esterification kettle, a heating jacket on the outside of the esterification kettle, an upper end of the esterification kettle connected to an esterification tower, a heating jacket connected to a steam generator, and an upper end of the esterification kettle also connected to an acetic acid preheating tank and a butanol preheating tank. Both the acetic acid preheating tank and the butanol preheating tank have heat exchange chambers on their outer sides, the heating jacket is connected to the heat exchange chambers, and the heat exchange chambers are connected to a fixed water tank.

[0005] A further improvement of the esterification reaction apparatus for the production of n-butyl acetate of this utility model is that the connecting pipe between the fixed water tank and the heat exchange chamber is submerged in the water surface of the fixed water tank. The heat exchange chamber includes an upper chamber and a lower chamber. Steam flows in the upper chamber, and the fixed water tank is connected to the lower chamber through a water pipe.

[0006] A further improvement of the esterification reaction apparatus for the production of n-butyl acetate of this utility model is that a drain outlet is provided at the lower end of the lower chamber, and a thermometer is provided in the lower chamber.

[0007] A further improvement of the esterification reaction apparatus for the production of n-butyl acetate of this utility model is that a second thermometer is provided in the fixed water tank, and a heater is also provided in the fixed water tank.

[0008] A further improvement of the esterification reaction apparatus for the production of n-butyl acetate of this utility model is that the upper end of the esterification tower is connected to a condenser, the condenser is connected to a phase separator, the phase separator is refluxed to the esterification tower, and the condenser includes an inlet end and an outlet end, with the outlet end connected to a fixed water tank.

[0009] A further improvement of this utility model of an esterification reaction apparatus for the production of n-butyl acetate is that a static water tank is also provided on one side of the fixed water tank, and the water outlet is also connected to the static water tank. Compared with the prior art, the beneficial effects of this utility model are: This invention preheats acetic acid and butanol in the esterification reactor by exchanging heat with the steam heated in the esterification reactor and the preheating tank, thereby reducing their reaction time in the esterification reactor and improving production efficiency. On the other hand, the steam after heat exchange enters the water tank, raising the water temperature and making it easier for the water to be used in the steam generator for steam production. Overall, this invention makes full use of energy and improves energy efficiency. Attached Figure Description

[0010] 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 diagram: 1 Esterification vessel, 2 Heating jacket, 3 Esterification tower, 4 Reboiler, 5 Condenser, 6 Phase separator, 7 Acetic acid preheating tank, 8 Upper chamber, 9 Lower chamber, 10 Butanol preheating tank, 11 Fixed water tank. Detailed Implementation

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] like Figure 1 As shown, an esterification reactor for the production of n-butyl acetate includes an esterification reactor 1, a heating jacket 2 on the outside of the esterification reactor, an esterification tower 3 connected to the upper end of the esterification reactor, a steam generator connected to the heating jacket, and an acetic acid preheating tank 7 and a butanol preheating tank 8 also connected to the upper end of the esterification reactor. Both the acetic acid preheating tank and the butanol preheating tank have heat exchange chambers on their outer sides, and the heating jackets are connected to the heat exchange chambers, which are connected to a fixed water tank 11. The esterification reactor is also connected to the esterification tower 3 via a reboiler 4.

[0016] Furthermore, the connecting pipe between the fixed water tank and the heat exchange chamber is submerged in the water within the fixed water tank. The heat exchange chamber includes an upper chamber 8 and a lower chamber 9. Steam flows in the upper chamber, and the fixed water tank is connected to the lower chamber via a water pipe. A water pump is installed on the water pipe. A drain outlet is located at the lower end of the lower chamber, and a thermometer is installed inside the lower chamber. A second thermometer is installed inside the fixed water tank, which also contains a heater. Through heat exchange using both steam and hot water, the acetic acid and butanol inside the tank are preheated, ensuring effective preheating.

[0017] Furthermore, the upper end of the esterification tower is connected to condenser 5, the condenser is connected to phase separator 6, and the phase separator is refluxed to the esterification tower. The condenser includes an inlet end and an outlet end, with the outlet end connected to a fixed water tank. A settling water tank is also provided on one side of the fixed water tank, and the outlet end is also connected to the settling water tank.

[0018] The working principle of this invention is as follows: Acetic acid and butanol enter the acetic acid preheating tank and butanol preheating tank from the raw material tank, and then enter the esterification kettle for heating and esterification reaction. The resulting n-butyl acetate gas enters the esterification tower for further distillation. The steam heated by the esterification kettle can enter the heat exchange chamber and exchange heat with the preheating tank to preheat the acetic acid and butanol. The steam after heat exchange enters the fixed water tank and contacts the cold water to increase the water temperature. The heated water can also enter the lower chamber for preheating. The water in the fixed water tank can also be used to generate steam in the steam generator. Overall, energy is fully utilized and energy efficiency is improved.

[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. An esterification reaction apparatus for the production of n-butyl acetate, characterized in that: The apparatus includes an esterification kettle, with a heating jacket on the outside. The upper end of the esterification kettle is connected to an esterification tower, and the heating jacket is connected to a steam generator. The upper end of the esterification kettle is also connected to an acetic acid preheating tank and a butanol preheating tank. Both the acetic acid preheating tank and the butanol preheating tank have heat exchange chambers on their outer sides, and the heating jacket is connected to the heat exchange chambers. The heat exchange chambers are connected to a fixed water tank.

2. The esterification reaction apparatus for producing n-butyl acetate according to claim 1, characterized by: The connecting pipe between the fixed water tank and the heat exchange chamber is submerged in the water in the fixed water tank. The heat exchange chamber includes an upper chamber and a lower chamber. Steam flows in the upper chamber, and the fixed water tank is connected to the lower chamber through a water pipe.

3. The esterification reaction apparatus for producing n-butyl acetate according to claim 2, characterized by: The lower chamber is provided with a drain outlet at its lower end, and a thermometer is provided inside the lower chamber.

4. The esterification reaction apparatus for producing n-butyl acetate according to claim 3, characterized by: The fixed water tank is equipped with a second thermometer and a heater.

5. The esterification reaction apparatus for producing n-butyl acetate according to claim 4, characterized by: The upper end of the esterification tower is connected to a condenser, the condenser is connected to a phase separator, and the phase separator is refluxed to the esterification tower. The condenser includes an inlet end and an outlet end, and the outlet end is connected to a fixed water tank.

6. The esterification reaction apparatus for producing n-butyl acetate according to claim 5, characterized by: A static water tank is also provided on one side of the fixed water tank, and the water outlet is also connected to the static water tank.

Images