CN114717079A - Molecular sieve regeneration device and method for reducing alcohol content and removing turbidity of white spirit - Google Patents

Molecular sieve regeneration device and method for reducing alcohol content and removing turbidity of white spirit Download PDF

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CN114717079A
CN114717079A CN202210381634.0A CN202210381634A CN114717079A CN 114717079 A CN114717079 A CN 114717079A CN 202210381634 A CN202210381634 A CN 202210381634A CN 114717079 A CN114717079 A CN 114717079A
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molecular sieve
white spirit
turbidity
leaching
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雷家珩
王康笑
易小琦
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Wuhan University of Technology WUT
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12H—PASTEURISATION, STERILISATION, PRESERVATION, PURIFICATION, CLARIFICATION OR AGEING OF ALCOHOLIC BEVERAGES; METHODS FOR ALTERING THE ALCOHOL CONTENT OF FERMENTED SOLUTIONS OR ALCOHOLIC BEVERAGES
    • C12H1/00—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages
    • C12H1/02—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages combined with removal of precipitate or added materials, e.g. adsorption material
    • C12H1/06—Precipitation by physical means, e.g. by irradiation, vibrations
    • C12H1/063—Separation by filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
    • B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12H—PASTEURISATION, STERILISATION, PRESERVATION, PURIFICATION, CLARIFICATION OR AGEING OF ALCOHOLIC BEVERAGES; METHODS FOR ALTERING THE ALCOHOL CONTENT OF FERMENTED SOLUTIONS OR ALCOHOLIC BEVERAGES
    • C12H1/00—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages
    • C12H1/02—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages combined with removal of precipitate or added materials, e.g. adsorption material
    • C12H1/04—Pasteurisation, sterilisation, preservation, purification, clarification, or ageing of alcoholic beverages combined with removal of precipitate or added materials, e.g. adsorption material with the aid of ion-exchange material or inert clarification material, e.g. adsorption material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel

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Abstract

The invention provides a molecular sieve regeneration device and method for reducing the alcohol content and removing turbidity of white spirit, and belongs to the technical field of white spirit processing. The invention relates to a molecular sieve regeneration device for reducing the alcohol content and removing turbidity of white spirit, which comprises a leaching barrel, wherein a liquid inlet is formed in the bottom end of the leaching barrel, a cover body with a liquid outlet is screwed at the top of the leaching barrel, a first filtering layer is arranged at the bottom of the leaching barrel, a second filtering layer is fixedly connected to the joint of the cover body and the leaching barrel, and a leaching cavity is formed between the first filtering layer and the second filtering layer. Also comprises a molecular sieve regeneration method for reducing the alcohol content and removing turbidity of the white spirit. The device realizes the regeneration of the molecular sieve by a reverse leaching structure, and has simple structure and easy operation. The regeneration method has high impurity removal rate of the molecular sieve, and the turbidity removal effect of the regenerated molecular sieve is not changed.

Description

Molecular sieve regeneration device and method for reducing alcohol content and removing turbidity of white spirit
Technical Field
The invention belongs to the technical field of white spirit processing, and particularly relates to a molecular sieve regeneration device and method for reducing alcohol degree and removing turbidity of white spirit.
Background
The spirit is made up of grains as main raw material, Daqu, Xiaoqu or bran koji and yeast as saccharifying leaven through steaming, saccharifying, fermenting and distilling. Also known as distilled liquor, old white spirit, knife, etc. The wine is colorless (or yellowish) and transparent, has aromatic and pure smell, is sweet and clean in mouth, has high alcohol content, and has compound fragrance with esters as main body after being stored and aged. The yeast and yeast are used as saccharifying ferment, starchiness (saccharine) raw material is used, and various wines are brewed by steaming, saccharifying, fermenting, distilling, ageing and blending. Strictly speaking, the blended wine blended by edible alcohol and edible perfume cannot be calculated as white spirit. The liquor is mainly concentrated in Guizhou renhuai, Sichuan Yibin and Sichuan Luzhou triangle zones at the upper reaches of the Yangtze river and in the Chishui river basin, and has distilled liquor production areas with the largest global scale and the best quality, namely Mao Wulu of three famous wines in China, and the liquor industry group carries the semiwall river mountain of the Chinese liquor industry. Most of white spirit brewing is solid state fermentation, and the main product is ethanol. Through detection and analysis, the white spirit contains most of ethanol and water and also contains other fragrant substances accounting for about 2 percent of the total amount. Because the amount and the mutual proportion of the aromatic substances in the nine types are different, the white spirit is different from alcohol, and different style characteristics are formed.
The production process of the white spirit is mainly divided into the following steps;
1. raw materials and the proportion thereof; the brewing raw materials are sorghum (36%), rice (22%), glutinous rice (18%), wheat (16%) and corn (8%), and the mass proportion of the sorghum, the rice, the glutinous rice, the wheat and the corn has strict requirements.
2. Crushing; the five kinds of grains are accurately proportioned according to a certain proportion and fully stirred, and then are crushed.
3. Steaming bran; the bran shell is a high-quality filler adopted in wine brewing, and can generate substances such as methanol, furfural and the like in the fermentation and cooking processes. The bran steaming can remove foreign odor in the bran shell.
4. Opening the cellar; removing the sealing mud from the cellar after the fermentation period, and collecting the distilled liquor. The fermentation period of the grain cellar is 70 days.
5. Preparing materials, stirring and moistening grains; the process is accurate to three degrees: the method has the advantages of accurate material proportioning, accurate lees proportioning and bran proportioning, and is uniform: mixing with grain, and mixing with bran.
6. Putting into a steamer; the steam is uniformly penetrated, the steam is not leaked, and the bamboo leaves are spread uniformly.
7. Distilling to collect liquor; during distillation, the principle of slow fire wine flowing and strong fire grain steaming is to be mastered. When the wine is picked, the quality of the wine is judged by tasting in a sense, and the picking is actually realized while tasting. After picking, the wine is transported into a wine storehouse, weighed and then mixed with a jar according to the quality.
8. Taking out of the steamer and spreading for cooling; before taking out of the retort, closing the air valve, taking down the bent pipe and uncovering the retort cover; and (5) hanging the steamer to the position near a grain cooling bed by a travelling crane, and opening the bottom of the steamer.
9. And (5) entering a cellar, taking out of the cellar, steaming wine and storing.
The turbidity removal of the white spirit is an important means for providing the flavor of the white spirit, the molecular sieve in the technology of removing the turbidity of the white spirit is a mode with better effect in the processing of the white spirit, and the abundant pore structures of the molecular sieve can improve the efficiency and the capacity of removing the turbidity of the white spirit. The molecular sieve for removing the turbidity of the white spirit is reproducible after being adsorbed and saturated, and the regeneration of the molecular sieve greatly reduces the production cost of removing the turbidity in the production process of the white spirit. The published Chinese patent with the application number of CN201510023971.2 discloses a molecular sieve efficient regeneration device and a process thereof; the device comprises at least two groups of molecular sieve adsorbent units, wherein at least one molecular sieve adsorber is arranged in each group of molecular sieve adsorbent units, a molecular sieve adsorbent layer is filled in each molecular sieve adsorber, a running inlet pipeline with a running inlet valve is connected to a pipeline between the molecular sieve adsorber and the inlet valve, and a running outlet pipeline with a running outlet valve is connected to a regenerated nitrogen outlet pipeline between the molecular sieve adsorber and the outlet valve; the outlet of the regenerated nitrogen storage tank is sequentially connected with the first valve and the shell side of the steam heater through pipelines, the shell side outlet of the steam heater is respectively connected with regenerated nitrogen inlet pipelines in at least two groups of molecular sieve adsorption units, and the regenerated nitrogen outlet pipeline is sequentially connected with the inlet of the regenerated nitrogen recovery storage tank through the second valve and the shell side of the circulating water heat exchanger. In the invention, the physical adsorption effect of the adsorption unit is utilized to take out the adsorbed substances in the molecular sieve, but the Fischer-Tropsch molecular sieve for removing the turbidity of the white spirit is mixed with a large amount of inorganic metal ions, higher fatty acid and the like, and the substances cannot be removed from the molecular sieve through a simple re-adsorption process. The molecular sieve is regenerated by 95 percent of alcohol,can reduce the higher fatty acid ester with more than twelve carbon atoms in the white spirit, thereby effectively improving the quality of the common white spirit. The 95% alcohol regenerated molecular sieve is an effective method, but can only remove most of higher fatty acid ester adsorbed by the molecular sieve, and can adsorb inorganic metal ions in the wine body to the molecular sieve[6]Such as Na+、K+、Ca2+、Mg2+、Cu2+、Zn2+、Pb2+、Mn2+、Al3+、Fe3+Etc. are difficult to remove. Therefore, when the molecular sieve is regenerated by 95% alcohol, not only are the organic impurities incompletely removed, but also the metal ions adsorbed by the molecular sieve are continuously accumulated, and the pore passages are blocked over time, so that the performance of the molecular sieve is reduced, and the service life of the molecular sieve is influenced.
Disclosure of Invention
The invention provides a molecular sieve regeneration device and method for reducing the alcohol content and removing turbidity of white spirit. In the regeneration method, metal ions in the molecular sieve structure are removed firstly, most higher fatty acid ester is removed by alcohol leaching, and finally, trace organic impurities such as higher fatty acid ester and the like remained in the molecular sieve are removed by sectional drying, so that the removal rate of the impurities in the molecular sieve is high, and the turbidity removal effect of the regenerated molecular sieve is unchanged.
The invention relates to a molecular sieve regeneration device for reducing the alcohol content and removing turbidity of white spirit, which comprises a leaching barrel, wherein the bottom end of the leaching barrel is provided with a liquid inlet, the top of the leaching barrel is in threaded connection with a cover body with a liquid outlet, the bottom of the leaching barrel is provided with a first filter layer, the inner wall of the joint of the cover body and the leaching barrel is fixedly connected with a second filter layer, and a leaching cavity is formed between the first filter layer and the second filter layer. First filter layer is including the first glass fiber cloth, the lower filter screen that from top to bottom set up, the second filter layer is including last filter screen, the second glass fiber cloth that from top to bottom set up, and the space between first glass fiber cloth, the second glass fiber cloth is exactly the drip washing chamber of depositing the molecular sieve, be equipped with the external screw thread on the top outer wall of drip washing bucket, the lid bottom is equipped with the internal thread, external screw thread, internal thread mating reaction. When the regeneration treatment of the molecular sieve is carried out, the molecular sieve is firstly placed in a leaching bucket, namely a leaching cavity, then a cover body is covered, and the cover body is screwed tightly.
The structure setting from bottom to top is for conveniently realizing that the leacheate is sprayed from a lower position, the regeneration treatment of the molecular sieve is carried out, the liquid is sprayed from bottom to top, the contact pressure between the molecular sieve and the liquid is much higher than that of the liquid sprayed from top to bottom, so that the leaching effect of the molecular sieve for reducing the alcohol content and removing turbidity of the white spirit can be improved, and the removal of metal ions and high fatty acid substances is improved.
A method for regenerating molecular sieve for reducing alcohol content and removing turbidity of Chinese liquor comprises the following steps;
(1) putting the liquor with a molecular sieve for reducing the alcohol content and removing turbidity into an elution cavity, spraying hydrochloric acid from a liquid inlet, and performing reverse gradient elution with the hydrochloric acid to remove a small amount of metal ions in the liquor adsorbed by the molecular sieve, wherein the concentration of the hydrochloric acid is changed from 0.05mol/L to 0 mol/L;
(2) spraying alcohol with the mass concentration of more than 95% into the leaching cavity from the liquid inlet, and performing reverse alcohol leaching;
(3) taking out the white spirit treated in the steps (1) to (2), reducing the alcohol content, removing turbidity by using a molecular sieve, placing the molecular sieve in a vacuum drying device, and carrying out temperature programming and vacuum drying, wherein the temperature programming comprises the following steps: heating the temperature to 200 ℃ for the first time, wherein the heating rate of the first heating is less than 60 ℃/h, and keeping the temperature for 1-2h to remove 95% of alcohol, ethyl palmitate and the like; the temperature is raised to 230 ℃ for the second time, the heating rate is less than 100 ℃/h, and the temperature is preserved to remove the ethyl oleate, the ethyl linoleate and the like; thirdly, heating to 250-260 ℃, wherein the heating rate is less than 100 ℃/h, and keeping the temperature until the content of the higher fatty acid ester in the tail gas of the vacuum drying oven is less than 1 ppm;
(4) reducing the alcohol content of the dried white spirit, removing turbidity, crushing and sieving by using a molecular sieve.
Carrying out reverse gradient leaching on the waste molecular sieve subjected to white spirit turbidity removal in a leaching device by using dilute hydrochloric acid to remove metal ions adsorbed by the molecular sieve; then carrying out reverse leaching by using 95% alcohol to remove most of higher fatty acid ester in the molecular sieve; then the molecular sieve is transferred into a vacuum drying device for vacuum drying, and the temperature is programmed to be higher than the boiling point of the adsorbed higher fatty acid ester, so that organic impurities such as the higher fatty acid ester and the like remained in the molecular sieve are further removed. And finally, crushing and screening the molecular sieve, and filling the molecular sieve into white spirit filtering equipment for reuse. Molecular sieves are aluminosilicate minerals of man-made porous structure, the pore size of which is generally determined by the Al/Si ratio of the aluminosilicate mineral. The pore size of the molecular sieve for the wine is generally 0.45 nm-0.56 nm, and substances of the molecular sieve for removing turbidity and adsorbing the white spirit are mainly ethyl palmitate, ethyl oleate and ethyl linoleate, so that the three substances can be removed in a segmented heating mode, and the physical and chemical properties of the three substances are as follows;
Figure DEST_PATH_IMAGE001
the device of the invention enters from the liquid inlet and flows out from the liquid outlet, and reverse elution is used, so that the molecular sieve for reducing the alcohol degree and removing turbidity of the white spirit placed in the elution cavity can be fully contacted with the eluted liquid, the regeneration of the molecular sieve is realized, the structure is simple, and the operation is easy. In the regeneration method, the alcohol content of the white spirit is reduced and the turbidity is removed, metal ions in the molecular sieve structure are removed by carrying out hydrochloric acid reverse gradient leaching on the molecular sieve, then most higher fatty acid ester is removed by alcohol leaching, and finally, trace organic impurities such as higher fatty acid ester and the like remained in the molecular sieve are removed by segmented drying.
Drawings
Fig. 1 is a schematic structural diagram of a molecular sieve regenerating device for reducing the alcohol content and removing turbidity of white spirit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
Example 1
Referring to fig. 1, the molecular sieve regeneration device for reducing the alcohol content and removing turbidity of the white spirit comprises a leaching barrel, wherein a liquid inlet is formed in the bottom end of the leaching barrel, a cover body with a liquid outlet is screwed on the top of the leaching barrel, a first filter layer is arranged at the bottom of the leaching barrel, a second filter layer is fixedly connected to the inner wall of the connection position of the cover body and the leaching barrel, and a leaching cavity is formed between the first filter layer and the second filter layer. First filter layer is including the first glass fiber cloth, the lower filter screen that from top to bottom set up, the second filter layer is including last filter screen, the second glass fiber cloth that from top to bottom set up, and the space between first glass fiber cloth, the second glass fiber cloth is exactly the drip washing chamber of depositing the molecular sieve, be equipped with the external screw thread on the top outer wall of drip washing bucket, the lid bottom is equipped with the internal thread, external screw thread, internal thread mating reaction. When the regeneration treatment of the molecular sieve is carried out, the molecular sieve is firstly put into a leaching barrel, namely a leaching cavity, then the cover body is covered, and the cover body is screwed tightly.
The structure from bottom to top is arranged to spray leacheate from a lower position for convenience, regeneration treatment of the molecular sieve is carried out, liquid is sprayed from bottom to top, the contact pressure of the molecular sieve and the liquid is much higher than that of the liquid, and therefore the leaching effect of the molecular sieve for reducing the alcohol content and removing turbidity of the white spirit can be improved, and removal of metal ions and high fatty acid substances is improved.
A method for regenerating molecular sieve for reducing alcohol content and removing turbidity of Chinese liquor comprises the following steps;
(1) putting the alcohol content reduction and turbidity removal liquor into a leaching cavity by using a molecular sieve, spraying hydrochloric acid from a liquid inlet in the figure 1, and performing reverse gradient leaching of the hydrochloric acid to remove a small amount of metal ions in the liquor adsorbed by the molecular sieve, wherein the concentration of the hydrochloric acid is changed from 0.05mol/L to 0 mol/L;
(2) spraying 98% alcohol into the leaching cavity from the liquid inlet, and performing reverse alcohol leaching;
(3) taking out the white spirit treated in the steps (1) to (2), reducing the alcohol content, removing turbidity by using a molecular sieve, placing the molecular sieve in a vacuum drying device, and carrying out temperature programming and vacuum drying, wherein the temperature programming comprises the following steps: heating to 200 deg.C for the first time at a heating rate of 40 deg.C/h, and maintaining for 1h to remove 95% alcohol and ethyl palmitate; heating to 220 ℃ for the second time, wherein the heating rate is 80 ℃/h, and keeping the temperature to remove ethyl oleate, ethyl linoleate and the like; heating to 250 ℃ for the third time, wherein the heating rate is 90 ℃/h, and keeping the temperature until the content of the higher fatty acid ester in the tail gas of the vacuum drying oven is less than 1 ppm;
(4) reducing the alcohol content of the dried white spirit, removing turbidity, crushing and sieving by using a molecular sieve.
Example 2
A method for regenerating molecular sieve for reducing alcohol content and removing turbidity of Chinese liquor comprises the following steps;
(1) putting the alcohol content reduction and turbidity removal liquor into a leaching cavity by using a molecular sieve, spraying hydrochloric acid from a liquid inlet in the figure 1, and performing reverse gradient leaching of the hydrochloric acid to remove a small amount of metal ions in the liquor adsorbed by the molecular sieve, wherein the concentration of the hydrochloric acid is changed from 0.05mol/L to 0 mol/L;
(2) spraying alcohol with the mass concentration of 96% into the leaching cavity from the liquid inlet, and performing reverse alcohol leaching;
(3) taking out the white spirit treated in the steps (1) to (2), reducing the alcohol content, removing turbidity by using a molecular sieve, placing the molecular sieve in a vacuum drying device, and carrying out temperature programming and vacuum drying, wherein the temperature programming comprises the following steps: heating to 200 deg.C for the first time at a heating rate of 50 deg.C/h, and maintaining for 1h to remove 95% alcohol and ethyl palmitate; heating to 230 ℃ for the second time, wherein the heating rate is 80 ℃/h, and keeping the temperature to remove ethyl oleate, ethyl linoleate and the like; heating to 260 ℃ for the third time, wherein the heating rate is 70 ℃/h, and keeping the temperature until the content of the higher fatty acid ester in the tail gas of the vacuum drying oven is less than 1 ppm;
(4) reducing the alcohol content of the dried white spirit, removing turbidity, crushing and sieving by using a molecular sieve.
Example 3
A method for regenerating molecular sieve for reducing alcohol content and removing turbidity of Chinese liquor comprises the following steps;
(1) putting the alcohol content reduction and turbidity removal liquor into a leaching cavity by using a molecular sieve, spraying hydrochloric acid from a liquid inlet in the figure 1, and performing reverse gradient leaching of the hydrochloric acid to remove a small amount of metal ions in the liquor adsorbed by the molecular sieve, wherein the concentration of the hydrochloric acid is changed from 0.05mol/L to 0 mol/L;
(2) spraying 98% alcohol into the leaching cavity from the liquid inlet, and performing reverse alcohol leaching;
(3) taking out the white spirit treated in the steps (1) to (2), reducing the alcohol content, removing turbidity by using a molecular sieve, placing the molecular sieve in a vacuum drying device, and carrying out temperature programming and vacuum drying, wherein the temperature programming comprises the following steps: heating to 200 deg.C for the first time at a heating rate of 50 deg.C/h, and maintaining for 1.5h to remove 95% alcohol and ethyl palmitate; heating to 225 ℃ for the second time, wherein the heating rate is 85 ℃/h, and keeping the temperature to remove ethyl oleate, ethyl linoleate and the like; heating to 255 ℃ for the third time, wherein the heating rate is 90 ℃/h, and keeping the temperature until the content of the higher fatty acid ester in the tail gas of the vacuum drying oven is less than 1 ppm;
(4) reducing the alcohol content of the dried white spirit, removing turbidity, crushing and sieving by using a molecular sieve.
Putting an equal amount of the same type of molecular sieve which is not subjected to white spirit turbidity removal and the molecular sieve regenerated in the examples 1 to 3 into an equal amount of white spirit, measuring the turbidity removal capability of the molecular sieve, and measuring the change of the white spirit turbidity before and after the molecular sieve treatment by using a turbidity removal instrument, wherein the specific data are as follows;
Figure 395016DEST_PATH_IMAGE002
from the above data, it can be seen that the molecular sieves regenerated in examples 1 to 3 have the same white spirit turbidity removal capability as the original molecular sieves, and the regenerated molecular sieves of the present invention have a good turbidity removal effect.

Claims (9)

1. The utility model provides a white spirit degree of falling removes turbid molecular sieve regenerating unit that uses, its characterized in that, includes the leaching barrel, the bottom of leaching barrel is equipped with the inlet, the top spiro union of leaching barrel has the lid of liquid outlet, the bottom of leaching barrel is equipped with first filter layer, the lid with leaching barrel junction rigid coupling second filter layer, form the leaching chamber between first filter layer, the second filter layer.
2. The molecular sieve regenerator for reducing the alcohol content and removing the turbidity of the white spirit according to claim 1, wherein the first filter layer comprises a first glass fiber cloth and a lower filter screen which are arranged from top to bottom.
3. The molecular sieve regeneration device for reducing the alcohol content and removing the turbidity of the white spirit according to claim 1, wherein the second filter layer comprises an upper filter screen and a second glass fiber cloth which are arranged from top to bottom.
4. The molecular sieve regeneration device for reducing the alcohol content and removing the turbidity of the white spirit according to claim 1, wherein an external thread is arranged on the outer wall of the top of the spray washing barrel, an internal thread is arranged at the bottom of the cover body, and the external thread and the internal thread are matched to act.
5. A method for regenerating a molecular sieve for reducing the alcohol content and removing turbidity of white spirit is characterized by comprising the following steps;
(1) putting the white spirit with a molecular sieve for reducing the alcohol content and removing turbidity into a leaching cavity, spraying hydrochloric acid from a liquid inlet, and performing reverse gradient leaching of the hydrochloric acid;
(2) spraying alcohol into the leaching cavity from the liquid inlet, and performing reverse alcohol leaching;
(3) taking out the white spirit treated in the steps (1) to (2), reducing the alcohol content, removing turbidity by using a molecular sieve, placing the molecular sieve in a vacuum drying device, and carrying out temperature programming and vacuum drying, wherein the temperature programming comprises the following steps: heating the temperature to 200 ℃ for the first time, and keeping the temperature for 1-2 h; the temperature is raised to 230 ℃ for the second time, and the temperature is preserved; the temperature is raised to 250-260 ℃ for the third time, and the temperature is preserved;
(4) reducing the alcohol content of the dried white spirit, removing turbidity, crushing and sieving by using a molecular sieve.
6. The method for regenerating the molecular sieve for reducing the alcohol content and removing the turbidity of the white spirit according to claim 5, wherein the concentration of the hydrochloric acid is changed from 0.05mol/L to 0 mol/L.
7. The method for regenerating the molecular sieve for reducing the alcohol degree and removing the turbidity of the white spirit according to claim 6,
the mass concentration of the alcohol in the step (2) is more than 95%.
8. The method for regenerating the molecular sieve for reducing the alcohol content and removing the turbidity of the white spirit according to claim 7, wherein the temperature rise rate of the first temperature rise is less than 60 ℃/h.
9. The method for regenerating the molecular sieve for reducing the alcohol content and removing the turbidity of the white spirit according to claim 7 or 8, wherein the rate of the second temperature rise and the third temperature rise is less than 100 ℃/h.
CN202210381634.0A 2022-04-13 2022-04-13 Molecular sieve regeneration device and method for reducing alcohol content and removing turbidity of white spirit Pending CN114717079A (en)

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CN201473513U (en) * 2009-09-15 2010-05-19 沈祖志 Compound multi-functional liquor treating machine
CN203053101U (en) * 2013-01-08 2013-07-10 南通欧意姆制冷设备有限公司 Single-way drying filter
CN107983299A (en) * 2017-12-11 2018-05-04 深圳道汇环保科技有限公司 A kind of preparation of modified molecular screen and renovation process
CN213668031U (en) * 2020-11-05 2021-07-13 福建博鸿新能源科技有限公司 Novel molecular sieve adsorbs dehydration device

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