CN115161416A - Molasses chemical calcium removal system and method - Google Patents
Molasses chemical calcium removal system and method Download PDFInfo
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- CN115161416A CN115161416A CN202210724165.8A CN202210724165A CN115161416A CN 115161416 A CN115161416 A CN 115161416A CN 202210724165 A CN202210724165 A CN 202210724165A CN 115161416 A CN115161416 A CN 115161416A
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- molasses
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B35/00—Extraction of sucrose from molasses
- C13B35/02—Extraction of sucrose from molasses by chemical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1813—Water specific cations in water, e.g. heavy metals
Abstract
The invention relates to the technical field of molasses pretreatment, and discloses a molasses chemical calcium removal system, which comprises a molasses storage tank, a calcium removal tank and a calcium removal tank, wherein the molasses storage tank is used for storing molasses which is subjected to dilution and heating; na (Na) 2 CO 3 Storage tank for formulating and storing Na 2 CO 3 A solution; softening tank, input end of the softening tank is respectively connected with molasses storage tank and Na 2 CO 3 The storage tanks are communicated; the self-circulation system comprises a self-circulation pipeline and a calcium ion detection module, and the calcium ion detection module is communicated with the output end of the softening tank and is used for detecting the content of calcium ions in the molasses; and the calcium ion detection module is communicated with the input end of the molasses storage tank and/or the softening tank through a self-circulation pipeline so as to return the molasses containing excessive calcium ions to the molasses storage tank and/or the softening tank for continuous chemical calcium removal treatment. The invention is arranged at the outlet pipeline of the softening tankThe calcium ion detection module is used for detecting the concentration of calcium ions, if the calcium ions do not react completely, the calcium ions are driven back to continue to react, and the content of calcium in the molasses can be effectively reduced through multiple circulating reactions.
Description
Technical Field
The invention relates to the technical field of molasses pretreatment, in particular to a molasses chemical calcium removal system and a molasses chemical calcium removal method.
Background
Molasses is a byproduct of sugar industry, has different compositions due to different sugar-making raw materials and processing conditions, mainly contains a large amount of fermentable sugars such as sucrose, is a good fermentation raw material, can be used as a substrate or a base material of fermentation products such as yeast, monosodium glutamate, organic acid and the like, and can be used as a raw material of certain foods and animal feed. The molasses has high yield, namely beet molasses, cane molasses, grape molasses and corn molasses, and the molasses has low yield, namely conversion molasses and refined molasses, contains more impurities besides sugar, wherein some impurities are useful, but most of the impurities have adverse effects on fermentation and need to be pretreated.
The molasses treatment process generally comprises the processes of dilution heating, chemical decalcification, filtration, chromatography, concentration and the like, wherein the chemical decalcification process is a very important process for reducing the calcium content in molasses, and in order to reduce the calcium content, the currently adopted mode is that sodium carbonate is added to react with calcium ions in molasses solution to generate calcium carbonate precipitate, but the process cannot ensure that the calcium ions completely react, and the concentration fluctuation of the prepared sodium carbonate solution is large, so that the calcium removal effect of the molasses solution is influenced.
Disclosure of Invention
In view of the above, the invention provides a molasses chemical calcium removal system and a molasses chemical calcium removal method, which can effectively solve the problem of insufficient calcium ion reaction, improve the calcium removal effect and enhance the stability of the reaction process.
The first purpose of the invention is to provide a molasses chemical decalcification system which comprises
The molasses storage tank is used for storing the diluted and heated molasses;
Na 2 CO 3 storage tank for formulating and storing Na 2 CO 3 A solution;
a softening tank, the input end of which is respectively connected with the molasses storage tank and the Na 2 CO 3 The storage tanks are communicated;
the self-circulation system comprises a self-circulation pipeline and a calcium ion detection module, and the calcium ion detection module is communicated with the output end of the softening tank and is used for detecting the content of calcium ions in molasses; and the calcium ion detection module is communicated with the input end of the molasses storage tank and/or the softening tank through a self-circulation pipeline so as to return molasses containing excessive calcium ions to the molasses storage tank and/or the softening tank for continuous chemical calcium removal treatment.
Preferably, in the molasses chemical calcium removal system, the molasses storage tank is connected with a NaOH storage tank for adjusting the pH value of the molasses in the molasses storage tank.
Preferably, in the molasses chemical decalcification system, the molasses storage tank is connected with the Na 2 CO 3 The storage tanks are connected with flow regulating devices to limit the molasses in the molasses storage tank and the Na 2 CO 3 Na in the storage tank 2 CO 3 Mixing ratio of the solution.
Preferably, in the molasses chemical decalcification system, the Na 2 CO 3 The storage tank is communicated with a molasses filtering system to take the calcium-removed molasses as a solvent and Na 2 CO 3 Preparation of Na by mixing solids 2 CO 3 And (3) solution.
Preferably, in the above molasses chemistry calcium removal system, the softening tanks are provided with a plurality of, and a plurality of the softening tanks are connected in series, and the bottom of the softening tank is provided with a solution inlet, and the top is provided with a solution outlet.
Preferably, in the molasses chemical calcium removal system, the bottom and the top of the softening tank are provided with sampling ports for detecting the concentration of calcium ions in the molasses solution entering and exiting the softening tank.
Preferably, in the molasses chemical calcium removal system, a mixer is further included, and the input end of the mixer is respectively connected with the molasses storage tank and the Na storage tank 2 CO 3 The storage tank is communicated, and the output end of the mixer is communicated to the softening tank.
The second purpose of the invention is to provide a molasses chemical calcium removal method, which comprises the following steps:
(1) Diluting the heated molasses solution with Na 2 CO 3 Mixing the solution and introducing the solution into a softening tank for chemical calcium removal reaction;
(2) Detecting the concentration of calcium ions in molasses discharged from the softening tank through a calcium ion detection module, and if the concentration of the calcium ions is higher than a preset value, returning the molasses to a molasses storage tank and/or the softening tank through a self-circulation pipeline to continue a chemical decalcification reaction; if the calcium ion concentration is lower than the preset value, the molasses is conveyed to a subsequent molasses filtering system.
Preferably, in the above method for chemical decalcification of molasses, the molasses solution is mixed with Na in step (1) 2 CO 3 The pH of the molasses solution was adjusted to 10 prior to mixing the solutions.
Preferably, in the molasses chemical calcium removal method, the calcium ions in the step (2) are free calcium ions, and the preset concentration value of the calcium ions is 500ppm.
The invention provides a molasses chemical decalcification system and a molasses chemical decalcification method, which have the following beneficial effects compared with the prior art:
according to the invention, the calcium ion detection module is arranged on the outlet pipeline of the softening tank to detect the calcium ion concentration, if the reaction is not completed, the reaction is returned to continue, and the calcium content in the molasses can be effectively reduced through multiple circulating reactions; the method prepares the sodium carbonate solution by refluxing the decalcified molasses, avoids the addition of water, can prevent the concentration fluctuation of the sodium carbonate solution, and enables the reaction to be stably carried out; according to the invention, the self-circulation pipeline is arranged, and the softened reaction liquid partially flows back to the softening tank to be used as seed crystals to induce calcium carbonate crystallization, so that the chemical calcium removal reaction is more complete and thorough.
Drawings
FIG. 1 is a schematic diagram of a molasses chemical decalcification system according to an embodiment of the present invention.
In the context of the figures, it is,
1 is a molasses storage tank and 2 is Na 2 CO 3 The device comprises a storage tank, a softening tank 3, a calcium ion detection module 4, a self-circulation pipeline 5, a NaOH storage tank 6, a mixer 7, a solid sodium carbonate storage tank 8, a sodium carbonate preparation tank 9, a reflux tank 10 and an overflow tank 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Referring to the attached figure 1, the embodiment of the invention provides a molasses chemical calcium removal system, which comprises a molasses storage tank 1, na 2 CO 3 The device comprises a storage tank 2, a softening tank 3, a calcium ion detection module 4 and a self-circulation pipeline 5;
the molasses storage tank 1 is used for storing the diluted and heated molasses; na (Na) 2 CO 3 The storage tank 2 is used for preparing and storing Na 2 CO 3 A solution; the input end of the softening tank 3 is respectively connected with the molasses storage tank 1 and the Na 2 CO 3 The storage tank 2 is communicated; the calcium ion detection module 4 is communicated with the output end of the softening tank 3 and is used for detecting the content of calcium ions in molasses; and the calcium ion detection module 4 is communicated with the input end of the molasses storage tank 1 and/or the softening tank 3 through a self-circulation pipeline 5, so that molasses containing excessive calcium ions is returned to the molasses storage tank 1 and/or the softening tank 3 through the self-circulation pipeline 5 to continue chemical calcium removal treatment.
In some embodiments of the present invention, a stirrer is disposed in the molasses storage tank 1, the molasses storage tank 1 is connected with a NaOH storage tank 6, the NaOH storage tank 6 pumps 50% NaOH solution to the molasses storage tank 1 through a pump with a volume flow rate of 50-120L/h, and is used for adjusting the pH value of molasses in the molasses storage tank 1 to 10, and the pH value of molasses is measured by a pH meter connected to the molasses storage tank 1.
In some embodiments of the invention, the molasses storage tank 1 and the Na 2 CO 3 The storage tanks 2 are all connected with a flow regulating device to limit the molasses in the molasses storage tank 1 and the Na 2 CO 3 Na in the storage tank 2 2 CO 3 Mixing proportion of the solution;
the flow regulating device is a flow meter and a variable frequency pump, and molasses and Na are controlled by the combined action of the flow meter and the variable frequency pump 2 CO 3 The mixing ratio of the solutions.
In some embodiments of the present invention, the molasses storage tank further comprises a mixer 7, wherein the input end of the mixer 7 is connected with the molasses storage tank 1 and the Na 2 CO 3 The storage tank 2 is communicated, and the output end of the mixer 7 is communicated to the softening tank 3; a check valve is arranged between the molasses storage tank 1 and the mixer 7 to prevent the molasses from flowing back to the molasses storage tank 1;
the passing volume flow of the molasses storage tank 1 is 10m 3 The mixer 7 is pumped by a variable frequency pump per hour with molasses being pumped by a variable frequency pump per hour 2 CO 3 The volume flow of the storage tank 2 is 0.6-2.4m 3 Na is pumped by a variable frequency pump of/h 2 CO 3 The solution is pumped to the mixer 7.
In some embodiments of the present invention, the present invention further comprises a solid sodium carbonate storage tank 8 and a sodium carbonate preparation tank 9, wherein an input end of the sodium carbonate preparation tank 9 is communicated with the solid sodium carbonate storage tank 8, and an output end is communicated with Na 2 CO 3 Storage tank 2, and Na 2 CO 3 A stirrer and Na are arranged in the storage tank 2 2 CO 3 In the storage tank 2 is Na with the concentration of 10 percent 2 CO 3 And (3) solution.
In some embodiments of the invention, the sodium carbonate preparation tank 9 is communicated with a molasses filtering system to prepare Na by mixing the molasses reflux after calcium removal as a solvent with solid sodium carbonate 2 CO 3 A solution; the returned molasses after calcium removal is stored in a return tank 10.
In some embodiments of the present invention, the softening tank 3 is provided in plurality, the plurality of softening tanks 3 are arranged in series, and the bottom end of the softening tank 3 is provided with a solution inlet, and the top end is provided with a solution outlet.
In some embodiments of the present invention, three softening tanks 3 are provided, and the three softening tanks 3 have the same model and are sequentially arranged from high to low, and the reaction time is increased by changing the height difference between the plurality of softening tanks 3 and by allowing the mixed solution to enter and exit from the lower part and the upper part, so that the softening reaction is more complete, and the reaction efficiency is improved.
In some embodiments of the present invention, the softening tank 3 is provided with sampling ports at both the bottom and top for detecting the concentration of calcium ions in the molasses solution entering and exiting the softening tank 3.
It should be noted that the reaction of calcium carbonate in the early stage of the softening reaction is slow, and the small-particle-size calcium carbonate is pumped back to the softening tank 3 through the self-circulation pipeline 5 for circulation, and the pumped-back small-particle-size calcium carbonate can be used as seed crystals to induce the complete crystallization of the calcium carbonate solution.
In some embodiments of the present invention, the system further comprises an overflow tank 11, which is communicated with the output end of the softening tank 3, and is configured to receive the softened reaction liquid and deliver the softened reaction liquid to the calcium ion detection module 4.
In some embodiments of the present invention, the calcium ion detecting module 4 is an automatic calcium ion concentration detecting instrument or a manual timing detecting instrument for detecting the calcium ion concentration.
In some embodiments of the present invention, agitators are disposed in the softening tank 3, the overflow tank 11, and the reflux tank 10.
In addition, the embodiment of the invention also provides a molasses chemical calcium removal method, which is illustrated by the specific embodiment.
Example 1
A molasses chemical calcium removal method comprises the following steps:
(1) Adjusting the pH value of the diluted and heated molasses solution to 10 for later use; preparing a sodium carbonate solution with the concentration of 10% for later use;
(2) Mixing diluted molasses with the pH value of 10 and 10% sodium carbonate solution in a mixer, and sequentially introducing the mixture into three softening tanks with high and low potential differences to perform chemical calcium removal reaction;
(3) The calcium ion concentration of the molasses discharged from the softening tank is detected to be 100ppm by a calcium ion detection module, and the molasses is directly conveyed to a subsequent molasses filtering system.
Example 2
A molasses chemical calcium removal method comprises the following steps:
(1) Adjusting the pH value of the diluted and heated molasses solution to 9 for later use; preparing a sodium carbonate solution with the concentration of 10% for later use;
(2) Mixing diluted molasses with the pH value of 9 and 10% sodium carbonate solution in a mixer, and sequentially introducing the mixture into three softening tanks with high and low potential differences to perform chemical calcium removal reaction;
(3) The calcium ion concentration of the molasses discharged from the softening tank is detected to be 300ppm by a calcium ion detection module, and the molasses is directly conveyed to a subsequent molasses filtering system.
Example 3
A molasses chemical calcium removal method comprises the following steps:
(1) Adjusting the pH value of the diluted and heated molasses solution to 8 for later use; preparing a sodium carbonate solution with the concentration of 10% for later use;
(2) Mixing diluted molasses with the pH value of 8 and 10% sodium carbonate solution in a mixer, and sequentially introducing the mixture into three softening tanks with high and low potential differences to perform chemical decalcification reaction;
(3) The calcium ion detection module detects that the concentration of calcium ions in molasses discharged from the softening tank is 600ppm, and the detected concentration of the calcium ions is higher than a preset value of 500ppm, so that the molasses is returned to the softening tank to continue a chemical calcium removal reaction, in the second softening process, the concentration of the calcium ions in the molasses reaches 200ppm after the molasses passes through the first softening tank, and the molasses is directly conveyed to a subsequent molasses filtering system by the first softening tank.
Comparative example 1
A molasses chemical calcium removal method comprises the following steps:
(1) Adjusting the pH value of the diluted and heated molasses solution to 7 for later use; preparing a sodium carbonate solution with the concentration of 10% for later use;
(2) Mixing diluted molasses with the pH value of 7 and 10% sodium carbonate solution in a mixer, and sequentially introducing the mixture into three softening tanks with high and low potential differences to perform chemical calcium removal reaction;
(3) The concentration of calcium ions in molasses discharged from a softening tank is detected to be 1000ppm through a calcium ion detection module, the concentration of the detected calcium ions is higher than 500ppm of a preset value, so that the molasses is returned to the molasses storage tank to continue to carry out chemical calcium removal circulation reaction, the concentration of the calcium ions in the molasses discharged from the softening tank is detected to be 600ppm through the calcium ion detection module after the second circulation reaction, the molasses is continuously returned to the softening tank to carry out chemical calcium removal reaction, the concentration of the calcium ions sequentially passes through three softening tanks and reaches 200ppm, and the molasses is conveyed to a subsequent molasses filtering system.
Comparative example 2
A molasses chemical calcium removal method comprises the following steps:
(1) Adjusting the pH value of the diluted and heated molasses solution to 11 for later use; preparing a sodium carbonate solution with the concentration of 10% for later use;
(2) Mixing diluted molasses with the pH value of 11 and 10% sodium carbonate solution in a mixer, and sequentially introducing the mixture into three softening tanks with high and low potential differences to perform chemical decalcification reaction;
(3) The calcium ion detection module detects that the concentration of calcium ions in molasses discharged from the softening tank is 850ppm, and because the detected concentration of the calcium ions is higher than 500ppm of a preset value, one part of molasses is returned to the molasses tank, the other part of molasses is returned to the softening tank to continue chemical calcium removal circulation reaction, after the second circulation reaction, the calcium ion detection module detects that the concentration of the calcium ions in molasses discharged from the softening tank is 400ppm, and the molasses is conveyed to a subsequent molasses filtering system.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the scheme disclosed by the embodiment, the scheme corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A molasses chemical decalcification system is characterized by comprising
The molasses storage tank is used for storing the diluted and heated molasses;
Na 2 CO 3 storage tank for formulating and storing Na 2 CO 3 A solution;
a softening tank, the input end of which is respectively connected with the molasses storage tank and the Na 2 CO 3 The storage tanks are communicated;
the self-circulation system comprises a self-circulation pipeline and a calcium ion detection module, and the calcium ion detection module is communicated with the output end of the softening tank and is used for detecting the content of calcium ions in molasses; and the calcium ion detection module is communicated with the input end of the molasses storage tank and/or the softening tank through a self-circulation pipeline so as to return molasses containing excessive calcium ions to the molasses storage tank and/or the softening tank for continuing chemical calcium removal treatment.
2. The molasses chemical calcium removal system of claim 1, wherein the molasses storage tank is connected with a NaOH storage tank for adjusting the pH value of molasses in the molasses storage tank.
3. The molasses chemical calcium removal system of claim 1, wherein the molasses storage tank and the Na 2 CO 3 The storage tanks are connected with flow regulating devices to limit the molasses in the molasses storage tank and the Na 2 CO 3 Na in the storage tank 2 CO 3 Mixing ratio of the solution.
4. Molasses chemical calcium removal system according to claim 1, characterized in that the Na 2 CO 3 The storage tank is communicated with a molasses filtering system to take the molasses after calcium removal as a solvent and Na 2 CO 3 Preparation of Na by mixing solids 2 CO 3 And (3) solution.
5. The molasses chemical calcium removal system according to claim 1, wherein the softening tank is provided with a plurality of softening tanks, the plurality of softening tanks are arranged in series, the bottom end of each softening tank is provided with a solution inlet, and the top end of each softening tank is provided with a solution outlet.
6. The molasses chemical calcium removal system according to claim 1, wherein the bottom and the top of the softening tank are provided with sampling ports for detecting the concentration of calcium ions in the molasses solution entering and exiting the softening tank.
7. The molasses chemical calcium removal system according to any one of claims 1-6, further comprising a mixer, wherein the input end of the mixer is respectively connected with the molasses storage tank and the Na 2 CO 3 The storage tank is communicated, and the output end of the mixer is communicated to the softening tank.
8. A method for chemical decalcification of molasses by using the system according to any one of claims 1-7, comprising the following steps:
(1) Mixing the diluted and heated molasses solution with Na 2 CO 3 Mixing the solution and introducing the solution into a softening tank for chemical calcium removal reaction;
(2) Detecting the concentration of calcium ions in molasses discharged from the softening tank through a calcium ion detection module, and if the concentration of the calcium ions is higher than a preset value, returning the molasses to a molasses storage tank and/or the softening tank through a self-circulation pipeline to continue a chemical calcium removal reaction; if the calcium ion concentration is lower than or equal to the preset value, the molasses is conveyed to a subsequent molasses filtering system.
9. Chemical decalcification of molasses according to claim 8, characterized in that in step (1) the molasses solution is mixed with Na 2 CO 3 Before the solution is mixed, the pH value of the molasses solution is adjusted to 8-10.
10. The molasses chemical calcium-removing method according to claim 8, characterized in that the calcium ion in step (2) is free calcium ion, and the preset concentration value of the calcium ion is 500ppm.
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| CN202210724165.8A CN115161416A (en) | 2022-06-25 | 2022-06-25 | Molasses chemical calcium removal system and method |
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| CN202210724165.8A CN115161416A (en) | 2022-06-25 | 2022-06-25 | Molasses chemical calcium removal system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112593017A (en) * | 2020-12-15 | 2021-04-02 | 新疆冠农果茸股份有限公司 | Efficient separation method for sugar in sugar production of beet |
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| US5454875A (en) * | 1994-07-01 | 1995-10-03 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Softening and purification of molasses or syrup |
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| CN112593017A (en) * | 2020-12-15 | 2021-04-02 | 新疆冠农果茸股份有限公司 | Efficient separation method for sugar in sugar production of beet |
| CN213950751U (en) * | 2020-12-17 | 2021-08-13 | 浙江华康药业股份有限公司 | Sewage calcium removal system |
| CN216764349U (en) * | 2022-01-31 | 2022-06-17 | 新乡赛普瑞特环保科技有限公司 | Get rid of automation equipment of calcium ion in lithium hydroxide solution |
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2022
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|---|---|---|---|---|
| AU8402782A (en) * | 1981-05-29 | 1982-12-02 | Kyowa Hakko Kogyo K.K. | Treating waste molasses |
| US5454875A (en) * | 1994-07-01 | 1995-10-03 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Softening and purification of molasses or syrup |
| CN109516628A (en) * | 2018-12-19 | 2019-03-26 | 北京朗新明环保科技有限公司 | A method of extracting magnesium sulfate from high magnesium low calcium power plant effluent |
| CN212293612U (en) * | 2020-05-15 | 2021-01-05 | 浙江华康药业股份有限公司 | Online continuous calcium system that removes of xylose mother liquor |
| CN112593017A (en) * | 2020-12-15 | 2021-04-02 | 新疆冠农果茸股份有限公司 | Efficient separation method for sugar in sugar production of beet |
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| CN112593017A (en) * | 2020-12-15 | 2021-04-02 | 新疆冠农果茸股份有限公司 | Efficient separation method for sugar in sugar production of beet |
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