Porous glass rectification filler

Abstract

A porous glass rectification filler is used for an ethanol rectification device, the whole porous glass rectification filler is cylindrical, and the porous glass rectification filler is formed by overlapping and bonding a plurality of porous glass sheets with certain waveforms; wherein every two adjacent porous glass sheets are twisted at a certain angle, the corrugation directions of odd layers of the porous glass sheets are consistent, and the corrugation directions of even layers of the porous glass sheets are in mirror symmetry with the odd layers of the porous glass sheets. According to the utility model, the porous glass is applied to a rectification process for brewing ethanol for the first time, and low-energy-consumption and high-quality production of brewing ethanol is realized by utilizing the characteristics of high specific surface area and high liquid holdup of the porous glass filler and the chemical property of strong acid corrosion resistance of the glass.

Description

Technical Field

[0001] The utility model belongs to the technical field of ethanol distillation, and particularly relates to a porous glass rectification filler. Background Art

[0002] In the process of fermentation to produce ethanol, distillation and purification of the mash is a key step. Generally, a distillation tower with fillers is used to separate different substances.

[0003] In the prior art, ethanol distillation is to press stainless steel wire mesh into a regular corrugated shape and put it into the distillation tower as filler to increase the gas-liquid contact area and increase the number of theoretical plates per unit height of the tower body, thereby achieving the purpose of efficient distillation. However, distillation towers using metal fillers still have the following shortcomings:

[0004] 1) The separation of substances inside the distillation tower needs to be achieved by continuous gas-liquid exchange. Metal fillers cannot hold liquid for a long time, and the liquid required for gas-liquid exchange is supplemented by a large amount of reflux liquid. Most of the reflux liquid needs to be re-evaporated. The larger the reflux ratio, the more energy is consumed by the re-evaporation, resulting in increased energy consumption and rising costs.

[0005] 2) A large amount of reflux will bring a large amount of low-volatile components at the bottom of the distillation tower into the distillation tower, resulting in a decrease in the content of volatile components inside the distillation tower, which is not conducive to the purification of volatile components in the mixture;

[0006] 3) Since the evaporation rate in the distillation tower is greater than or equal to the reflux rate, the ratio of the evaporant to the liquid to be evaporated is too large, which is not conducive to the enrichment of the volatile components in the evaporant. Although there are more theoretical plates, the actual separation efficiency is not high;

[0007] 4) High reflux ratio causes the distilled system to stay in the high temperature environment for too long, which increases the probability of undesirable side reactions and increases the difficulty of product purification;

[0008] 5) The fermentation process of ethanol will produce by-products such as formic acid and acetic acid. These acidic substances will corrode metal fillers at high temperatures, causing stainless steel elements such as iron, chromium, nickel, and molybdenum to enter the final distillation product. Although the content is in the order of tens of ppm, it cannot be ignored in the food industry that is related to human health. Utility Model Content

[0009] In order to solve the problems existing in the prior art such as low liquid holding capacity of fillers, high reflux ratio, high energy consumption and corrosion, the utility model applies porous glass to the distillation process of brewing ethanol for the first time, and utilizes the high specific surface area and high liquid holding capacity characteristics of porous glass fillers and the strong acid corrosion resistance of glass to achieve low energy consumption and high quality production of brewing ethanol.

[0010] The utility model provides a porous glass distillation filler, characterized in that:

[0011] The porous glass rectification filler is cylindrical in shape as a whole, and is formed by stacking and bonding multiple porous glass sheets with a certain waveform;

[0012] Wherein, each two adjacent porous glass sheets are twisted at a certain angle, and the corrugation directions of the odd-numbered layers of the porous glass sheets are consistent, and the corrugation directions of the even-numbered layers of the porous glass sheets are mirror-symmetrical to those of the odd-numbered layers.

[0013] The waveform is a triangle, a water waveform with a smooth transition, or a trapezoid.

[0014] The angle ranges from 60° to 90°.

[0015] The pore structures of the porous glass rectification filler are interconnected.

[0016] The beneficial effects of the technical solution of the utility model are:

[0017] (1) By using porous glass distillation fillers to replace existing metal fillers, the surface area of ​​porous glass distillation fillers is more than 3 times that of metal fillers under the same volume, so it can have a higher liquid holding capacity, the first evaporated liquid can have a more complete contact with the rising gas in the distillation tower, the gas-liquid material exchange is more thorough, and high-purity distillation can be achieved without a high reflux ratio, thereby reducing energy consumption;

[0018] (2) The theoretical number of plates of porous glass distillation packing is higher than that of traditional metal packing. The height of the distillation tower is lower under the same distillation effect, which can reduce the investment in the distillation tower.

[0019] (3) Within the temperature range of the present invention, the glass distillation filler has strong corrosion resistance to various organic acids and will not bring other elements into the product during the distillation process, which helps to obtain high-quality ethanol;

[0020] (4) The porous glass distillation filler has a block structure, which is easy to replace and maintain, and is more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] For a more complete understanding of the present invention, reference will now be made to the following description in conjunction with the accompanying drawings, in which:

[0022] Figure 1 Schematic diagram of different corrugated shapes of porous glass fillers provided by the utility model;

[0023] Figure 2 This is a schematic diagram of the porous glass distillation filler provided by the utility model. DETAILED DESCRIPTION

[0024] In order to make the problems, technical solutions and technical effects to be solved by the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments and methods obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] The utility model provides a porous glass rectification filler for an ethanol rectification device. The porous glass rectification filler is formed by overlapping and bonding porous glass sheets with certain waveforms.

[0026] As shown in the attached figure of the instruction manual Figure 1 As shown, the porous glass sheet can adopt various waveforms, for example, the waveform can be a triangle, a water waveform with smooth transition, a trapezoid, and other shapes.

[0027] The porous glass distillation packing is cylindrical in shape as a whole, and is formed by stacking and fixing multiple porous glass sheets. Each two adjacent porous glass sheets are twisted at a certain angle, which can be 0° to 180°, and generally ranges from 60° to 90°. The corrugation direction of the odd-numbered layers of the porous glass sheets is consistent, and the corrugation direction of the even-numbered layers is mirror-symmetrical to that of the odd-numbered layers.

[0028] Instruction Manual Figure 2 The porous glass rectification filler is shown as being obtained by stacking a plurality of porous glass sheets having triangular corrugations.

[0029] The porous glass distillation filler has a pore structure that is interconnected and has a large specific surface area. The specific surface area of ​​each cubic meter of porous glass can be more than 6000m 2 , which is very conducive to the full spreading of liquid on the porous glass surface, thereby enhancing the contact opportunity between the gas and liquid phases, improving the heat and mass transfer effects, and enhancing the distillation efficiency.

[0030] When in use, the porous glass distillation filler is prepared according to the model and quantity required by the distillation tower design, the porous glass distillation filler is placed in the filler installation area of ​​the distillation tower, the mash to be distilled is filled into the reboiler, and the distillation process is started according to the process requirements to perform the distillation operation.

[0031] In order to verify the effect of the porous glass distillation filler provided by the utility model, a comparative test was carried out.

[0032] Example 1

[0033] Prepare 500X type porous glass distillation fillers described in the utility model according to the quantity required by the distillation tower design, place the porous glass distillation fillers in the filler installation area of ​​the distillation tower, fill the mash to be distilled into the reboiler, and start the distillation process according to the process requirements to perform distillation operations.

[0034] Comparative Example

[0035] Prepare 500X type wire mesh fillers according to the quantity required by the distillation tower design, place the wire mesh fillers in the filler installation area of ​​the distillation tower, fill the mash to be distilled into the reboiler, and start the distillation process according to the process requirements to perform distillation operations.

[0036] The Example 1 and the comparative example were operated under different operating conditions, and the obtained distillation results were compared, and the following conclusions were drawn:

[0037] (1) Under the same operating conditions, the theoretical plate number of the porous glass distillation packing in Example 1 is 7-8 pieces / m, and the theoretical plate number of the metal wire mesh packing in the comparative example is 4.5-5.5 pieces / m; Example 1 is significantly higher than the comparative example;

[0038] (2) When obtaining products of the same purity and weight, the heat energy consumed in Example 1 is reduced by more than 15% compared with the comparative example;

[0039] (3) If the same amount of distillation filler is used in Example 1 and the comparative example, the purity of the product in Example 1 is two percentage points higher than that in the comparative example, increasing from 93% to 95%;

[0040] (4) To obtain the same product purity (93%), the amount of filler used in Example 1 is more than 15% less than that in the comparative example;

[0041] (5) Under the same operating conditions, the total metal ion content of the product obtained in Example 1 is ≤20 ppm, while the total metal ion content of the product obtained in the comparative example is ≥100 ppm.

[0042] The test results show that the porous glass distillation filler provided by the utility model can effectively reduce the energy consumption of the distillation process, reduce the amount of distillation filler used, reduce the volume of the distillation equipment, and improve the purity of the product.

Claims

1. A porous glass distillation filler, characterized in that: The porous glass rectification filler is cylindrical in shape as a whole, and is formed by stacking and bonding multiple porous glass sheets with a certain waveform; Wherein, each two adjacent porous glass sheets are twisted at a certain angle, and the corrugation directions of the odd-numbered layers of the porous glass sheets are consistent, and the corrugation directions of the even-numbered layers of the porous glass sheets are mirror-symmetrical to those of the odd-numbered layers.

2. The filler according to claim 1, characterized in that The waveform is a triangle, a water waveform with a smooth transition, or a trapezoid.

3. The filler according to claim 1, characterized in that The angle ranges from 60° to 90°.

4. The filler according to claim 1, characterized in that The pore structures of the porous glass rectification filler are interconnected.

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