An inorganic membrane ethanol dehydration device using pervaporation

Abstract

This utility model relates to an inorganic membrane ethanol dehydration device using pervaporation, comprising a raw material storage tank, an inorganic permeation membrane module, a product condenser, a permeate condenser, and a permeate tank. The raw material storage tank is connected to a circulating pump, which is connected to the feed inlet of the inorganic permeation membrane module. The feed outlet of the inorganic permeation membrane module is connected to the feed inlet of the product condenser, and the discharge outlet of the product condenser is connected back to the raw material storage tank. The permeate outlet of the inorganic permeation membrane module is connected to the feed inlet of the permeate condenser, and the discharge outlet of the permeate condenser is connected to the permeate tank. The beneficial effects of this utility model are: the inorganic permeation membrane has good chemical and thermal stability; during the storage and circulating dehydration process of ethanol, the system can continuously dehydrate the ethanol, ensuring the continuity and stability of production and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to an ethanol dehydration device, and more particularly to a membrane treatment process. Background Technology

[0002] During ethanol storage, intermittent dehydration is necessary to ensure that the ethanol maintains stable quality during storage.

[0003] There are multiple methods for dehydration, the most common being distillation, molecular sieve adsorption, and pervaporation membrane separation.

[0004] Distillation is based on the difference in boiling points between ethanol and water. By heating, ethanol and water are vaporized one after the other and then condensed, thus achieving a preliminary separation of ethanol and water.

[0005] Molecular sieve adsorption removes water from ethanol by utilizing the selective adsorption of water molecules by molecular sieves.

[0006] Currently, the most effective method is pervaporation membrane separation.

[0007] Currently, pervaporation membrane separation is only used to remove water from ethanol to improve its purity, and it has not yet been applied to the series of processes for the proper storage of dehydrated ethanol. Therefore, we have specifically designed an inorganic membrane ethanol dehydration device using pervaporation for ethanol circulation dehydration. Utility Model Content

[0008] To overcome the current lack of ethanol pervaporation membranes for ethanol storage, this invention provides an inorganic membrane ethanol dehydration device using pervaporation.

[0009] The technical solution of this utility model to solve its technical problem is: an inorganic membrane ethanol dehydration device for pervaporation, including a raw material storage tank, an inorganic permeation membrane module, a product condenser, a permeate condenser, and a permeate tank; The raw material storage tank is connected to a circulation pump, which is connected to the feed inlet of the inorganic permeation membrane module. The feed outlet of the inorganic permeation membrane module is connected to the feed inlet of the product condenser, and the discharge outlet of the product condenser is connected back to the raw material storage tank. The permeate outlet of the inorganic permeate membrane module is connected to the feed inlet of the permeate condenser, and the discharge outlet of the permeate condenser is connected to the permeate tank. The cooling water inlet is connected to the cooling medium inlet of the permeate condenser, the cooling medium outlet of the permeate condenser is connected to the cooling medium inlet of the product condenser, and the cooling medium outlet of the product condenser is connected to the cooling water return port. The heat transfer oil inlet is connected to the heating medium inlet of the inorganic permeation membrane module, and the heating medium outlet of the inorganic permeation membrane module is connected to the heat transfer oil return port.

[0010] To facilitate the discharge of the permeate, the permeate tank is also provided with an opening connected to a vacuum pump, which evacuates the permeate tank.

[0011] To facilitate sampling, a sampling tap is also provided on the raw material storage tank.

[0012] To facilitate the cleaning of the permeate tank, a venting tap is also provided at the lower end of the permeate tank.

[0013] A preferred embodiment of the heat transfer oil is a synthetic heat transfer oil.

[0014] In a preferred embodiment, the cooling water temperature at the cooling water inlet is 5°C.

[0015] In operation, this invention utilizes a continuously running circulation pump. Ethanol from the raw material storage tank is pumped into the inorganic permeate membrane module for water and ethanol separation. The purified ethanol is then condensed in the product condenser and returned to the raw material storage tank, completing one cycle. The permeate precipitated from the inorganic permeate membrane module is cooled in the permeate condenser and then flows into the permeate tank for storage, awaiting discharge. The inorganic permeate membrane module uses heat transfer oil as the heating medium, enabling efficient heat transfer and allowing the membrane module to quickly reach and maintain the required operating temperature.

[0016] The beneficial effects of this invention are as follows: 1. Inorganic permeable membranes possess excellent chemical and thermal stability, maintaining stable performance across a wide range of temperature, pressure, and chemical environments. This allows dehydration systems using inorganic permeable membranes to operate continuously and stably, eliminating the need for frequent shutdowns for maintenance and component replacement. During the storage-cycle dehydration of ethanol, the system can continuously dehydrate the ethanol, ensuring production continuity and stability and improving production efficiency. 2. The inorganic permeable membrane dehydration process is a physical separation process that does not involve chemical reactions and does not generate large amounts of waste or pollutants. Compared to some traditional dehydration methods, such as those using chemical desiccants, which may produce waste residue and other pollutants, inorganic permeable membrane dehydration technology is more environmentally friendly. It reduces environmental pollution and aligns with today's societal requirements for green and sustainable development. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the liquid circuit of one embodiment of the present invention. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] Example 1 Combined with appendix Figure 1An inorganic membrane ethanol dehydration device using pervaporation includes a raw material storage tank 1, an inorganic permeation membrane module 2, a product condenser 3, a permeate condenser 4, and a permeate tank 5. The raw material storage tank 1 is connected to a circulating pump 6, the circulating pump 6 is connected to the feed inlet of the inorganic permeation membrane module 2, the feed outlet of the inorganic permeation membrane module 2 is connected to the feed inlet of the product condenser 3, and the discharge outlet of the product condenser 3 is connected back to the raw material storage tank 1. The permeate outlet of the inorganic permeate membrane module 2 is connected to the feed inlet of the permeate condenser 4, and the discharge outlet of the permeate condenser 4 is connected to the permeate tank 5. Cooling water inlet 7 is connected to the cooling medium inlet of permeate condenser 4, cooling medium outlet of permeate condenser 4 is connected to the cooling medium inlet of product condenser 3, and cooling medium outlet of product condenser 3 is connected to cooling water return port 8. The heat transfer oil inlet 9 is connected to the heat supply medium inlet of the inorganic permeation membrane module 2, and the heat supply medium outlet of the inorganic permeation membrane module 2 is connected to the heat transfer oil return port 10.

[0020] To facilitate the discharge of the permeate, the permeate tank 5 is also provided with an opening connected to a vacuum pump 11, which evacuates the permeate tank 5.

[0021] To facilitate sampling, a sampling tap 12 is also provided on the raw material storage tank 1.

[0022] To facilitate the cleaning of the permeate tank, a venting tap 13 is also provided at the lower end of the permeate tank 5.

[0023] A preferred embodiment of the heat transfer oil is a synthetic heat transfer oil.

[0024] In a preferred embodiment, the cooling water temperature at the cooling water inlet 7 is 5°C.

[0025] In this embodiment, during operation, the circulation pump 6 is continuously running. Ethanol in the raw material storage tank 1 is pumped by the circulation pump 6 into the inorganic permeate membrane module 2 for water and ethanol separation. The purified ethanol enters the product condenser 3 for condensation and then returns to the raw material storage tank 1 to complete one cycle. The permeate precipitated from the inorganic permeate membrane module 2 enters the permeate condenser 4 for cooling and then flows into the permeate tank 5 for storage, awaiting discharge. The inorganic permeate membrane module 2 uses heat transfer oil as the heating medium, enabling efficient heat transfer and allowing the membrane module to quickly reach the required operating temperature and maintain a stable temperature.

[0026] The beneficial effects of this embodiment are as follows: 1. Inorganic permeable membranes possess excellent chemical and thermal stability, maintaining stable performance across a wide range of temperature, pressure, and chemical environments. This allows dehydration systems using inorganic permeable membranes to operate continuously and stably, eliminating the need for frequent shutdowns for maintenance and component replacement. During the storage-cycle dehydration of ethanol, the system can continuously dehydrate the ethanol, ensuring production continuity and stability and improving production efficiency. 2. The inorganic permeable membrane dehydration process is a physical separation process that does not involve chemical reactions and does not generate large amounts of waste or pollutants. Compared to some traditional dehydration methods, such as those using chemical desiccants, which may produce waste residue and other pollutants, inorganic permeable membrane dehydration technology is more environmentally friendly. It reduces environmental pollution and aligns with today's societal requirements for green and sustainable development. In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A pervaporative inorganic membrane ethanol dehydration apparatus, characterized by: This includes raw material storage tanks, inorganic permeation membrane modules, product condensers, permeate condensers, and permeate tanks; The raw material storage tank is connected to a circulation pump, which is connected to the feed inlet of the inorganic permeation membrane module. The feed outlet of the inorganic permeation membrane module is connected to the feed inlet of the product condenser, and the discharge outlet of the product condenser is connected back to the raw material storage tank. The permeate outlet of the inorganic permeate membrane module is connected to the feed inlet of the permeate condenser, and the discharge outlet of the permeate condenser is connected to the permeate tank. The cooling water inlet is connected to the cooling medium inlet of the permeate condenser, the cooling medium outlet of the permeate condenser is connected to the cooling medium inlet of the product condenser, and the cooling medium outlet of the product condenser is connected to the cooling water return port. The heat transfer oil inlet is connected to the heating medium inlet of the inorganic permeation membrane module, and the heating medium outlet of the inorganic permeation membrane module is connected to the heat transfer oil return port.

2. The pervaporation inorganic membrane ethanol dehydration apparatus according to claim 1, characterized by: The permeate tank is also provided with an opening that connects to a vacuum pump, which evacuates the permeate tank.

3. The pervaporation inorganic membrane ethanol dehydration apparatus according to claim 1, characterized by: The raw material storage tank is also equipped with a sampling tap.

4. The inorganic membrane ethanol dehydration device for pervaporation according to claim 1, characterized in that: The lower end of the permeate tank is also equipped with a venting tap.

5. The pervaporation inorganic membrane ethanol dehydration apparatus according to claim 1, characterized by: The heat transfer oil used is a synthetic type.

6. The pervaporation inorganic membrane ethanol dehydration apparatus according to claim 1, characterized by: The cooling water temperature at the cooling water inlet is 5℃.

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