阅读说明：本技术 一种膜分离生产无水乙醇的工艺 (Process for producing absolute ethyl alcohol by membrane separation ) 是由 郑鹏 韦兴鹏 史新玉 王攀 郑伟 朱慧林 毕繁荣 于 2020-05-15 设计创作，主要内容包括：本发明公开了一种膜分离生产无水乙醇的工艺,包括以下步骤：1)、准备5-10根管道和一个承载管道的圆柱形容器,在管道的内壁安装分子筛膜；2)、将管道固定在圆柱形容器内部的周围,且管道的底部安装有阀门,在圆柱形容器的底部或者底部的侧面安装出水管道；3)、将圆柱形容器的底部朝下安装在机架上,并且在圆柱形容器的顶部安装一个旋转装置。该膜分离生产无水乙醇的工艺,通过利用分子筛膜,然后经过加压泵将工业乙醇送入分子筛膜的中部,由于管道内外的压力差,且水分子直径较小的缘故,从而水分子会经过分子筛膜流出管道外部,从而使管道内部的工业乙醇变为无水乙醇,此方法经济且环保。(The invention discloses a process for producing absolute ethyl alcohol by membrane separation, which comprises the following steps: 1) preparing 5-10 pipelines and a cylindrical container for bearing the pipelines, and installing a molecular sieve membrane on the inner wall of each pipeline; 2) fixing the pipeline around the inside of the cylindrical container, installing a valve at the bottom of the pipeline, and installing a water outlet pipeline at the bottom of the cylindrical container or on the side surface of the bottom of the cylindrical container; 3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container. According to the process for producing the absolute ethyl alcohol through the membrane separation, the molecular sieve membrane is utilized, then the industrial ethyl alcohol is sent into the middle of the molecular sieve membrane through the pressure pump, and due to the fact that the pressure difference between the inside and the outside of the pipeline is small in diameter of water molecules, the water molecules can flow out of the pipeline through the molecular sieve membrane, so that the industrial ethyl alcohol inside the pipeline is changed into the absolute ethyl alcohol, and the method is economical and environment-friendly.)

1. A process for producing absolute ethyl alcohol by membrane separation is characterized by comprising the following steps:

1) preparing 5-10 pipelines and a cylindrical container for bearing the pipelines, and installing a molecular sieve membrane on the inner wall of each pipeline;

2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, installing a valve at the bottom of the pipeline, and installing a water outlet pipeline at the bottom of the cylindrical container or on the side surface of the bottom of the cylindrical container;

3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;

4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;

5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;

6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, and the rotating device is started to rotate the cylindrical container, so that a centrifugal force is generated;

7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;

8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.

2. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: in the step 1), the diameter of the pipeline is 2-5cm, small holes are distributed around the pipeline, and the diameter of each small hole is 3-5 mm.

3. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: the pipeline in the cylindrical container in the step 2) is an industrial ethanol feeding pipeline, and the cylindrical container is a water container.

4. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: the pipeline and the cylindrical container are both made of stainless steel.

5. The process for producing absolute ethanol by membrane separation according to claim 1, wherein: the rotating speed of the rotating device in the step 6) is 60-80 r/min.

Technical Field

The invention relates to the technical field of absolute ethyl alcohol manufacturing processes, in particular to a process for producing absolute ethyl alcohol by membrane separation.

Background

The industrial ethanol is generally colorless transparent liquid, is flammable and volatile, has slight aroma of wine, and the basic purification method of the industrial ethanol can reach the concentration of 95 percent and can not meet the requirement of producing DEC.

Therefore, a process for separating industrial ethanol into absolute ethanol by using a molecular sieve membrane is needed.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a process for producing absolute ethyl alcohol by membrane separation, which aims to solve the problems in the background art.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a process for producing absolute ethyl alcohol by membrane separation comprises the following steps:

1) preparing 5-10 pipelines and a cylindrical container for bearing the pipelines, and installing a molecular sieve membrane on the inner wall of each pipeline;

2) fixing the pipeline in the step 1) around the inner part of the cylindrical container, installing a valve at the bottom of the pipeline, and installing a water outlet pipeline at the bottom of the cylindrical container or on the side surface of the bottom of the cylindrical container;

3) the bottom of the cylindrical container is downwards arranged on the frame, and a rotating device is arranged at the top of the cylindrical container;

4) a main pipeline is arranged above the pipeline in the cylindrical container, and the pipeline in the cylindrical container is connected with the main pipeline;

5) industrial ethanol is sent into the interior of a main pipeline through a pressure pump, and then is distributed into the pipeline in each cylindrical container due to the pressure effect and is positioned inside a molecular sieve membrane;

6) when the pressurizing pump works, a pressure difference is formed between the interior of the molecular sieve membrane and the exterior of the pipeline, and the rotating device is started to rotate the cylindrical container, so that a centrifugal force is generated;

7) because the molecular size of water is smaller than that of ethanol, water molecules automatically enter the outside of the pipeline through the molecular sieve membrane under the action of pressure, flow into the wall of the cylindrical container, are discharged through the water outlet pipeline, are filled in the container and are collected, and absolute ethanol is remained in the pipeline;

8) opening a valve at the bottom of the pipeline, discharging the absolute ethyl alcohol, and then carrying out the steps from 5) to 7) to obtain the final absolute ethyl alcohol product.

Preferably, the diameter of the pipeline in the step 1) is 2-5cm, small holes are distributed around the pipeline, and the diameter of each small hole is 3-5 mm;

preferably, the pipeline in the cylindrical container in the step 2) is an industrial ethanol feeding pipeline, and the cylindrical container is a water container;

preferably, the pipeline and the cylindrical container are both made of stainless steel;

preferably, the rotating speed of the rotating device in the step 6) is 60-80 r/min.

(III) advantageous effects

Compared with the prior art, the invention provides a process for producing absolute ethyl alcohol by membrane separation, which has the following beneficial effects:

1. according to the process for producing the absolute ethyl alcohol by membrane separation, the molecular sieve membrane is utilized, and then the industrial ethyl alcohol is conveyed into the middle part of the molecular sieve membrane through the pressurizing pump, so that water molecules can flow out of the pipeline through the molecular sieve membrane due to the pressure difference between the inside and the outside of the pipeline and the small diameter of the water molecules, and the industrial ethyl alcohol in the pipeline is changed into the absolute ethyl alcohol;

2. according to the process for producing the absolute ethyl alcohol by the membrane separation, the centrifugal force generated by the pressure pump and the rotating device improves the efficiency of water molecule separation, the separation of water molecules is more facilitated, and the industrial ethyl alcohol can be thoroughly separated from the water molecules through three repeated processes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.