A new type of ethylene carbonate production device

Abstract

The utility model relates to a novel ethylene carbonate production device. The technical scheme is as follows: the output ends of the ethylene oxide storage tank and the catalyst storage tank are respectively connected to the mixer through pipelines, and the mixture is sent to the upper inlet of the ethylene carbonate reactor; more than one group of carbon dioxide storage tanks are respectively connected to the gasifier, and after the carbon dioxide is gasified, it is collected and connected to the carbon dioxide buffer bag, and then connected to the side line inlet of the ethylene carbonate reactor through a pipeline; the bottom is connected to the side line of the ethylene carbonate refining tower through a pipeline, and the top is connected to the first condenser, the defoamer, and the second condenser through a pipeline to obtain ethylene carbonate. The beneficial effects are: on the one hand, multiple groups of gasifiers are added and connected to the carbon dioxide buffer bag, which improves the stability of carbon dioxide transportation; on the other hand, the cold generated in the process of carbon dioxide gasification is fully utilized, and the chilled water used by the condenser is cooled, so that the energy is fully utilized and the production energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to an ethylene carbonate preparation device, in particular to a novel ethylene carbonate production device. Background Art

[0002] Ethylene carbonate (EC) is an organic chemical raw material with excellent performance and a wide range of functions. EC is the main raw material for producing dimethyl carbonate by ester exchange. In recent years, high-purity ethylene carbonate is also mainly used in lithium battery electrolytes. It is the largest solvent in lithium battery electrolytes. In the future, with the development of lithium-ion power batteries, the amount of ethylene carbonate solvent will increase, and the development prospects are broad, but the requirements for product quality will naturally increase. The current commonly used preparation method is: ethylene carbonate is prepared by the addition reaction of ethylene oxide and carbon dioxide. From the perspective of chemical equilibrium, low temperature and high pressure conditions are conducive to the reaction. At the same time, the selection of a suitable catalyst is the key to whether the reaction can proceed smoothly. In the production process of ethylene carbonate, the stability of the raw material CO2 feed plays a vital role in the stability of the production and operation of the device. Research on the stability technology of carbon dioxide transportation of raw materials in the production of ethylene carbonate is of great significance to improving the stability rate of the device and reducing safety accidents; in addition, the large amount of cold generated during the gasification of carbon dioxide is not fully utilized, resulting in energy loss. Utility Model Content

[0003] The purpose of the utility model is to provide a novel ethylene carbonate production device in view of the above-mentioned defects in the prior art. The utility model improves the stability of carbon dioxide transportation by adding multiple groups of gasifiers and connecting carbon dioxide buffer bags. In addition, the cold energy generated during the gasification of carbon dioxide is used to cool the chilled water used in the condenser, thereby achieving full utilization of energy and reducing production energy consumption.

[0004] The utility model discloses a novel ethylene carbonate production device, the technical scheme of which is as follows: comprising an ethylene oxide storage tank (1), a catalyst storage tank (2), a mixer (3), a carbon dioxide buffer bag (4), a first gasifier (5), a second gasifier (6), a third gasifier (7), a first group of carbon dioxide storage tanks (C1), a second group of carbon dioxide storage tanks (C2), a third group of carbon dioxide storage tanks (C3), an ethylene carbonate reactor (T101), an ethylene carbonate refining tower (T102), a first condenser (8), a defoamer (9), a second condenser (10), and an ethylene carbonate product tank (11), wherein the output ends of the ethylene oxide storage tank (1) and the catalyst storage tank (2) are respectively connected to the mixer (3) through pipelines, and the output end of the mixer (3) is connected to the upper inlet of the ethylene carbonate reactor (T101) through a pipeline; the first group of the second condenser (8) and the second condenser (10) are connected to the upper inlet of the ethylene carbonate reactor (T101) through a pipeline; The carbon dioxide storage tank (C1), the second group of carbon dioxide storage tanks (C2), and the third group of carbon dioxide storage tanks (C3) are respectively connected to the inlet of the first gasifier (5), the second gasifier (6), and the third gasifier (7) through pipelines. After the carbon dioxide is gasified, it is respectively collected and connected to the carbon dioxide buffer capsule (4). The output end of the carbon dioxide buffer capsule (4) is connected to the side line inlet of the ethylene carbonate reactor (T101) through a pipeline; the bottom of the ethylene carbonate reactor (T101) is connected to the side line of the ethylene carbonate refining tower (T102) through a pipeline, and the top of the ethylene carbonate refining tower (T102) is connected to the first condenser (8) through a pipeline. The output end of the first condenser (8) is connected to the second condenser (10) through a pipeline and a defoamer (9), and the output end of the second condenser (10) is connected to the ethylene carbonate product tank (11);

[0005] The shell side outlet of the first condenser (8) is connected to the tube side inlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) through a chilled water return pipeline (15), and the tube side outlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) are connected to the shell side inlet of the first condenser (8) through a chilled water supply pipeline (16).

[0006] Preferably, the shell side outlet of the second condenser (10) is connected to the tube side inlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) via a chilled water return pipeline (15), and the tube side outlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) are connected to the shell side inlet of the second condenser (10) via a chilled water supply pipeline (16).

[0007] Preferably, the output end of the mixer (3) is connected to the upper inlet of the ethylene carbonate reactor (T101) through a pipeline and a first feed pump (12).

[0008] Preferably, the bottom of the ethylene carbonate reactor (T101) is connected to the side line of the ethylene carbonate refining tower (T102) via a pipeline and a second feed pump (13).

[0009] Preferably, the chilled water supply pipeline (16) is connected to the external pipeline (17) via a tee.

[0010] Preferably, the bottom of the ethylene carbonate refining tower (T102) is connected to an intermediate material tank (14) via a pipeline.

[0011] The beneficial effects of the utility model are as follows: the utility model sends liquid carbon dioxide to the first gasifier, the second gasifier and the third gasifier through the first group of carbon dioxide storage tanks, the second group of carbon dioxide storage tanks and the third group of carbon dioxide storage tanks for gasification, absorbs a large amount of heat during the gasification process, so that the generated cold can be fully utilized; the gasified carbon dioxide is sent to the carbon dioxide buffer bag, and the carbon dioxide buffer bag can play a role in stabilizing the carbon dioxide. After the stability is improved, the product reaction is more stable and the product fluctuation is reduced; the carbon dioxide gas is then sent to the side line of the ethylene carbonate reactor for reaction to generate ethylene carbonate The ethylene carbonate is then sent to the ethylene carbonate refining tower for distillation and purification; in addition, the chilled water used in the condenser is condensed and then connected to the first vaporizer, the second vaporizer and the third vaporizer pipe inlet through the chilled water return pipeline to make full use of the cooling capacity of the vaporizer; in short, the utility model improves the smoothness of carbon dioxide transportation by adding multiple groups of vaporizers and connecting carbon dioxide buffer bags, the product quality can be greatly improved, and the product stability is also improved; on the other hand, the cooling capacity generated in the process of carbon dioxide gasification is fully utilized to cool the chilled water used in the condenser, thereby achieving full utilization of energy and reducing production energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of embodiment 1 of the utility model;

[0013] Figure 2 It is a structural schematic diagram of embodiment 2 of the utility model;

[0014] In the above figure: ethylene oxide storage tank 1, catalyst storage tank 2, mixer 3, carbon dioxide buffer bag 4, first gasifier 5, second gasifier 6, third gasifier 7, first group of carbon dioxide storage tank C1, second group of carbon dioxide storage tank C2, third group of carbon dioxide storage tank C3, ethylene carbonate reactor T101, ethylene carbonate refining tower T102, first condenser 8, demister 9, second condenser 10, ethylene carbonate product tank 11, first feed pump 12, second feed pump 13, intermediate material tank 14, chilled water return pipeline 15, chilled water supply pipeline 16, external pipeline 17. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] Example 1, reference Figure 1 The utility model discloses a novel ethylene carbonate production device, comprising an ethylene oxide storage tank 1, a catalyst storage tank 2, a mixer 3, a carbon dioxide buffer bag 4, a first gasifier 5, a second gasifier 6, a third gasifier 7, a first group of carbon dioxide storage tanks C1, a second group of carbon dioxide storage tanks C2, a third group of carbon dioxide storage tanks C3, an ethylene carbonate reactor T101, an ethylene carbonate refining tower T102, a first condenser 8, a demister 9, a second condenser 10, and an ethylene carbonate product tank 11, wherein the output ends of the ethylene oxide storage tank 1 and the catalyst storage tank 2 are respectively connected to the mixer 3 through pipelines, and the output end of the mixer 3 is connected to the upper end inlet of the ethylene carbonate reactor T101 through a pipeline; the first group of carbon dioxide storage tanks C1 and the second group of carbon dioxide storage tanks C2, the third group of carbon dioxide storage tanks C3, an ethylene carbonate reactor T101, an ethylene carbonate refining tower T102, a first condenser 8, a demister 9, a second condenser 10, and an ethylene carbonate product tank 11, wherein the output ends of the ethylene oxide storage tank 1 and the catalyst storage tank 2 are respectively connected to the mixer 3 through pipelines, and the output end of the mixer 3 is connected to the upper end inlet of the ethylene carbonate reactor T101 through a pipeline; 1. The second group of carbon dioxide storage tanks C2 and the third group of carbon dioxide storage tanks C3 are respectively connected to the inlets of the first gasifier 5, the second gasifier 6 and the third gasifier 7 through pipelines. After the carbon dioxide is gasified, they are respectively collected and connected to the carbon dioxide buffer capsule 4. The output end of the carbon dioxide buffer capsule 4 is connected to the side line inlet of the ethylene carbonate reactor T101 through a pipeline; the bottom of the ethylene carbonate reactor T101 is connected to the side line of the ethylene carbonate refining tower T102 through a pipeline, and the top of the ethylene carbonate refining tower T102 is connected to the first condenser 8 through a pipeline, and the output end of the first condenser 8 is connected to the second condenser 10 through a pipeline and a demister 9, and the output end of the second condenser 10 is connected to the ethylene carbonate product tank 11.

[0017] Among them, the shell side outlet of the above-mentioned first condenser 8 is connected to the pipe side inlet of the first vaporizer 5, the second vaporizer 6 and the third vaporizer 7 through the chilled water return pipeline 15, and the pipe side outlets of the first vaporizer 5, the second vaporizer 6 and the third vaporizer 7 are connected to the shell side inlet of the first condenser 8 through the chilled water supply pipeline 16.

[0018] In addition, the shell side outlet of the above-mentioned second condenser 10 is connected to the tube side inlet of the first vaporizer 5, the second vaporizer 6 and the third vaporizer 7 through the chilled water return pipeline 15, and the tube side outlets of the first vaporizer 5, the second vaporizer 6 and the third vaporizer 7 are connected to the shell side inlet of the second condenser 10 through the chilled water supply pipeline 16.

[0019] The output end of the mixer 3 is connected to the upper inlet of the ethylene carbonate reactor T101 through a pipeline and a first feed pump 12, wherein the catalyst in the catalyst storage tank 2 is conventional technology well known to those skilled in the art and will not be described in detail here.

[0020] The bottom of the ethylene carbonate reactor T101 is connected to the side line of the ethylene carbonate refining tower T102 via a pipeline and a second feed pump 13 .

[0021] The bottom of the ethylene carbonate refining tower T102 is connected to the intermediate material tank 14 through a pipeline.

[0022] When the utility model is used, ethylene oxide and a catalyst are respectively sent to a mixer 3 through an ethylene oxide storage tank 1 and a catalyst storage tank 2 for mixing, and then sent to the upper end of an ethylene carbonate reactor T101; at the same time, liquid carbon dioxide is respectively sent to a first gasifier 5, a second gasifier 6 and a third gasifier 7 through a first group of carbon dioxide storage tanks C1, a second group of carbon dioxide storage tanks C2 and a third group of carbon dioxide storage tanks C3 for gasification, and a large amount of heat is absorbed during the gasification process, so that the generated cold can be fully utilized; the gasified carbon dioxide is sent to a carbon dioxide buffer capsule 4, which can stabilize the carbon dioxide, and then the carbon dioxide gas is sent to the ethylene carbonate reactor T101. The side line of 101 reacts to generate ethylene carbonate, which is then sent to the ethylene carbonate refining tower T102 for distillation and purification. During the purification process, the chilled water used in the first condenser 8 and the second condenser 10 is condensed and then connected to the first vaporizer 5, the second vaporizer 6 and the third vaporizer 7 pipe inlet through the chilled water return pipeline 15, so as to make full use of the cooling capacity of the vaporizer and reduce the production energy consumption; the cooled chilled water is then sent to the first condenser 8 and the second condenser 10 through the chilled water supply pipeline 16 for continued use. The bottom of the ethylene carbonate refining tower T102 is connected to the intermediate material tank 14, and the ethylene carbonate obtained after passing through the demister 9 and the second condenser 10 is sent to the ethylene carbonate product tank 11.

[0023] Embodiment 2, the utility model mentioned a novel ethylene carbonate production device, comprising an ethylene oxide storage tank 1, a catalyst storage tank 2, a mixer 3, a carbon dioxide buffer capsule 4, a first gasifier 5, a second gasifier 6, a third gasifier 7, a first group of carbon dioxide storage tanks C1, a second group of carbon dioxide storage tanks C2, a third group of carbon dioxide storage tanks C3, an ethylene carbonate reactor T101, an ethylene carbonate refining tower T102, a first condenser 8, a demister 9, a second condenser 10, and an ethylene carbonate product tank 11, wherein the output ends of the ethylene oxide storage tank 1 and the catalyst storage tank 2 are respectively connected to the mixer 3 through pipelines, and the output end of the mixer 3 is connected to the upper end inlet of the ethylene carbonate reactor T101 through a pipeline; the first group of carbon dioxide storage tanks C1, a second group of carbon dioxide storage tanks C2, a third group of carbon dioxide storage tanks C3, an ethylene carbonate reactor T101, an ethylene carbonate refining tower T102, a first condenser 8, a demister 9, a second condenser 10, and an ethylene carbonate product tank 11, wherein the output ends of the ethylene oxide storage tank 1 and the catalyst storage tank 2 are respectively connected to the mixer 3 through pipelines, and the output end of the mixer 3 is connected to the upper end inlet of the ethylene carbonate reactor T101 through a pipeline; Tank C1, the second group of carbon dioxide storage tanks C2, and the third group of carbon dioxide storage tanks C3 are respectively connected to the inlets of the first gasifier 5, the second gasifier 6 and the third gasifier 7 through pipelines. After the carbon dioxide is gasified, they are respectively collected and connected to the carbon dioxide buffer bag 4, and the output end of the carbon dioxide buffer bag 4 is connected to the side line inlet of the ethylene carbonate reactor T101 through a pipeline; the bottom of the ethylene carbonate reactor T101 is connected to the side line of the ethylene carbonate refining tower T102 through a pipeline, and the top of the ethylene carbonate refining tower T102 is connected to the first condenser 8 through a pipeline, and the output end of the first condenser 8 is connected to the second condenser 10 through a pipeline and a demister 9, and the output end of the second condenser 10 is connected to the ethylene carbonate product tank 11.

[0024] The difference from Example 1 is:

[0025] The external pipeline 17 is connected to the chilled water supply pipeline 16 through a tee to prevent the cooling capacity generated by the first vaporizer 5, the second vaporizer 6 and the third vaporizer 7 from being insufficient to reduce the temperature of the chilled water to the required temperature. The external pipeline 17 can be connected to a compressor or external chilled water to make the chilled water reach the required temperature.

[0026] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent transformation based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A novel ethylene carbonate production device, characterized in that: The invention comprises an ethylene oxide storage tank (1), a catalyst storage tank (2), a mixer (3), a carbon dioxide buffer bag (4), a first gasifier (5), a second gasifier (6), a third gasifier (7), a first group of carbon dioxide storage tanks (C1), a second group of carbon dioxide storage tanks (C2), a third group of carbon dioxide storage tanks (C3), an ethylene carbonate reactor (T101), an ethylene carbonate refining tower (T102), a first condenser (8), a demister (9), a second condenser (10), and an ethylene carbonate product tank (11), wherein the output ends of the ethylene oxide storage tank (1) and the catalyst storage tank (2) are respectively connected to the mixer (3) through pipelines, and the output end of the mixer (3) is connected to the upper inlet of the ethylene carbonate reactor (T101) through a pipeline; the first group of carbon dioxide storage tanks (C1), the second group of carbon dioxide storage tanks (C2), the third group of carbon dioxide storage tanks (C3), an ethylene carbonate reactor (T101), an ethylene carbonate refining tower (T102), a first condenser (8), a demister (9), a second condenser (10), and an ethylene carbonate product tank (11), wherein the output ends of the ethylene oxide storage tank (1) and the catalyst storage tank (2) are respectively connected to the mixer (3) through pipelines, and the output end of the mixer (3) is connected to the upper inlet of the ethylene carbonate reactor (T101) through a pipeline; The carbon dioxide storage tank (C2) and the third group of carbon dioxide storage tanks (C3) are connected to the inlets of the first gasifier (5), the second gasifier (6) and the third gasifier (7) through pipelines, respectively. After the carbon dioxide is gasified, it is collected and connected to the carbon dioxide buffer capsule (4), and the output end of the carbon dioxide buffer capsule (4) is connected to the side line inlet of the ethylene carbonate reactor (T101) through a pipeline; the bottom of the ethylene carbonate reactor (T101) is connected to the side line of the ethylene carbonate refining tower (T102) through a pipeline, and the top of the ethylene carbonate refining tower (T102) is connected to the first condenser (8) through a pipeline, and the output end of the first condenser (8) is connected to the second condenser (10) through a pipeline and a defoamer (9), and the output end of the second condenser (10) is connected to the ethylene carbonate product tank (11); The shell side outlet of the first condenser (8) is connected to the tube side inlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) via a chilled water return pipeline (15), and the tube side outlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) are connected to the shell side inlet of the first condenser (8) via a chilled water supply pipeline (16).

2. A novel ethylene carbonate production device according to claim 1, characterized in that: The shell side outlet of the second condenser (10) is connected to the tube side inlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) via a chilled water return pipeline (15), and the tube side outlets of the first vaporizer (5), the second vaporizer (6) and the third vaporizer (7) are connected to the shell side inlet of the second condenser (10) via a chilled water supply pipeline (16).

3. A novel ethylene carbonate production device according to claim 2, characterized in that: The output end of the mixer (3) is connected to the upper inlet of the ethylene carbonate reactor (T101) through a pipeline and a first feed pump (12).

4. A novel ethylene carbonate production device according to claim 3, characterized in that: The bottom of the ethylene carbonate reactor (T101) is connected to the side line of the ethylene carbonate refining tower (T102) through a pipeline and a second feed pump (13).

5. A novel ethylene carbonate production device according to claim 4, characterized in that: The chilled water supply pipeline (16) is connected to the external pipeline (17) via a tee.

6. A novel ethylene carbonate production device according to claim 1, characterized in that: The bottom of the ethylene carbonate refining tower (T102) is connected to the intermediate material tank (14) via a pipeline.

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