CN103638689A - Method for increasing evaporation velocity of feed liquid in continuous type vacuum concentration crystallizer - Google Patents
Method for increasing evaporation velocity of feed liquid in continuous type vacuum concentration crystallizer Download PDFInfo
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- CN103638689A CN103638689A CN201310693096.XA CN201310693096A CN103638689A CN 103638689 A CN103638689 A CN 103638689A CN 201310693096 A CN201310693096 A CN 201310693096A CN 103638689 A CN103638689 A CN 103638689A
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Abstract
The invention discloses a method for increasing the evaporation velocity of a feed liquid in a continuous type vacuum concentration crystallizer. The method comprises the following steps of connecting a mixing condenser with the continuous type vacuum concentration crystallizer, introducing circulating water into the mixing condenser, and raising the temperature of the circulating water utilized by the mixing condenser to 32-35 DEG C from a normal temperature, namely 20 DEG C, so as to raise the temperature of the feed liquid in the continuous type vacuum concentration crystallizer to 8-10 DEG C. According to the method, the evaporation velocity of the feed liquid is increased, the output of the feed liquid is increased, the primary crystallization rate of the feed liquid is improved, meanwhile, the electric power, consumed for cooling the circulating water, of a fan is saved, and the production cost of vitamin C is lowered.
Description
Technical field
The present invention relates to Progresses of Vitamin C Productive Technology field, particularly relate to a kind of method that improves feed liquid evaporation rate in continuous vacuum condensing crystallizing device.
Background technology
Current domestic production of vitamin C technique is: the sorbierite of take carries out two-step fermentation as raw material, zymotic fluid obtains 2-KLG after extracting, 2-KLG obtains crude product vitamin C sodium salt after over-churning transforms, the crude product vitamin C sodium salt aqueous solution obtains the crude product vitamin C aqueous solution after ion-exchange, after continuous vacuum condensing crystallizing is also centrifugal, obtain crude product vitamin C crystal again, then after process for refining, obtain ascorbic this process route of finished product.Because the crude product vitamin C sodium salt aqueous solution has obtained the crude product vitamin C aqueous solution after ion-exchange, in this aqueous solution, ascorbic content is lower, need to pass through a large amount of concentration process, and crystallization is centrifugal just can obtain crude product vitamin C crystal afterwards.Thereby how to improve evaporation rate, and improve primary crystallization rate, then promoting yield is the problem that production of vitamin C enterprise gropes always and studies.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method that improves feed liquid evaporation rate in continuous vacuum condensing crystallizing device, it improves the evaporation rate of feed liquid, and improved the primary crystallization rate of quantum of output and feed liquid, save the blower fan institute consuming electric power for cooling circulating water simultaneously, reduced ascorbic production cost.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of method that improves feed liquid evaporation rate in continuous vacuum condensing crystallizing device, it is characterized in that, and it comprises the following steps:
Mixing condenser is connected with continuous vacuum condensing crystallizing device, recirculated water passes in mixing condenser, the water temperature of mixing condenser recirculated water used is promoted to 32 ℃ ~ 35 ℃ by normal 20 ℃ of left and right, thereby makes feed temperature in continuous vacuum condensing crystallizing device improve 8 ~ 10 ℃.
Preferably, described continuous vacuum condensing crystallizing device is connected with a heater.
Preferably, described continuous vacuum condensing crystallizing device is connected with first steam jet pump.
Preferably, described heater, the first steam jet pump are all connected with second steam jet pump.
Preferably, the feed liquid displays temperature in described continuous vacuum condensing crystallizing device is 26 ℃ ~ 29 ℃.
Positive progressive effect of the present invention is: one, and the present invention can improve the evaporation rate of feed liquid in continuous vacuum condensing crystallizing device, promotes the solid content of feed liquid, accelerates discharging speed, improves quantum of output.Two, the present invention can improve the primary crystallization rate of feed liquid in continuous vacuum condensing crystallizing device, improves and produces yield.Three, even the present invention can drive the blower fan of or not for cooling circulating water less, saved the electric energy that blower fan consumes.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention improves the element that the method for feed liquid evaporation rate in continuous vacuum condensing crystallizing device used.
The specific embodiment
The method that the present invention improves feed liquid evaporation rate in continuous vacuum condensing crystallizing device comprises the following steps: mixing condenser 1 is connected (as shown in Figure 1 with continuous vacuum condensing crystallizing device 2,), recirculated water passes in mixing condenser, the water temperature of mixing condenser recirculated water used is promoted to 32 ℃ ~ 35 ℃ by normal 20 ℃ of left and right, thereby makes feed temperature in continuous vacuum condensing crystallizing device improve 8 ~ 10 ℃.
Continuous vacuum condensing crystallizing device 2 is connected with a heater 5.Continuous vacuum condensing crystallizing device is connected with first steam jet pump 3.Heater 5, the first steam jet pump 3 are all connected with second steam jet pump 4.
A control examples of the present invention (technology) is as follows: the water temperature of mixing condenser recirculated water used is controlled to 20 ℃ of left and right, crude product vitamin C aqueous solution content is controlled at 300mg/ml, for heating the steam flow of continuous vacuum condensing crystallizing device feed liquid, be controlled at 2.8T/h, the steam flow of extracting the heat pump of feed liquid solvent in continuous vacuum condensing crystallizing device for dense steaming out is controlled at 5.5T/h, when entering feed temperature in continuous vacuum condensing crystallizing device and being 38 ℃ of left and right, feed rate can only be 10.5 T/h, feed liquid displays temperature in continuous vacuum condensing crystallizing device is 25 ℃ ~ 28 ℃, the solid content that now detects feed liquid is 22% ~ 24%, thereby discharging speed can only be controlled at 8.5T/h, it is pure that post produces 24 hours accumulative total output crude product vitamin C crystal 70100kg(), primary crystallization rate is 92.72%.
Effect example of the present invention is as follows: the water temperature of mixing condenser recirculated water used is controlled to 32 ℃ ~ 25 ℃, crude product vitamin C aqueous solution content is controlled at 300mg/ml, for heating the steam flow of continuous vacuum condensing crystallizing device feed liquid, be controlled at 2.8T/h, the steam flow of extracting the heat pump of feed liquid solvent in continuous vacuum condensing crystallizing device for dense steaming out is controlled at 5.5T/h, when entering feed temperature in continuous vacuum condensing crystallizing device and being 38 ℃ of left and right, feed rate can be added to 13T/h, now the feed liquid displays temperature in continuous vacuum condensing crystallizing device is 26 ℃ ~ 29 ℃, the solid content that detects feed liquid is 28% ~ 30%, thereby discharging speed can be added to 10T/h, it is pure that post produces 24 hours accumulative total output crude product vitamin C crystal 88600kg(), primary crystallization rate is 94.66%.
The present invention is promoted to 32 ℃ ~ 35 ℃ by the water temperature of mixing condenser recirculated water used by normal 20 ℃ of left and right, like this at feeding temperature and heating feed liquid steam flow used with originally identical in the situation that, can make feed temperature in continuous vacuum condensing crystallizing device improve 8 ~ 10 ℃, thereby the evaporation rate of feed liquid in continuous vacuum condensing crystallizing device will be conducive to improve, the solid content of feed liquid in continuous vacuum condensing crystallizing device is promoted rapidly, can accelerate discharging speed like this, improve quantum of output.Meanwhile, because the water temperature of mixing condenser recirculated water used is brought up to 28 ℃ ~ 30 ℃, even can not open or not less for the blower fan of cooling circulating water, have saved blower fan institute consuming electric power.The present invention is promoted to 32 ℃ ~ 35 ℃ by the water temperature of mixing condenser recirculated water used by normal 20 ℃ of left and right, can make like this heat energy that in continuous vacuum condensing crystallizing device that the less sorption type heat pump of recirculated water in mixing condenser extracts out, feed liquid solvent is vaporized, and can make this part heat energy continue to act on heater, feed liquid in continuous vacuum condensing crystallizing device is heated.The present invention is promoted to 32 ℃ ~ 35 ℃ by the water temperature of mixing condenser recirculated water used by normal 20 ℃ of left and right, improved the evaporation rate of feed liquid in continuous vacuum condensing crystallizing device, the solid content of feed liquid in continuous vacuum condensing crystallizing device is promoted rapidly, can accelerate discharging speed like this, improve quantum of output.After the evaporation rate of feed liquid improves in continuous vacuum condensing crystallizing device, can make the solid content of feed liquid promote rapidly, and can accelerate discharging speed, improve quantum of output, in continuous vacuum condensing crystallizing device, the primary crystallization rate of feed liquid will improve like this, and yield will promote.
The present invention utilizes the continuous vacuum condensing crystallizing device of production of vitamin C enterprise configuration, the water temperature of mixing condenser recirculated water used is promoted to 32 ℃ ~ 35 ℃ by normal 20 ℃ of left and right, can make like this heat energy that in continuous vacuum condensing crystallizing device that the less sorption type heat pump of recirculated water in mixing condenser extracts out, feed liquid solvent is vaporized, and can make this part heat energy continue to act on heater, feed liquid in continuous vacuum condensing crystallizing device is heated, its temperature is improved, and then improve dense steaming speed, improve production capacity and primary crystallization rate, and yield is produced in lifting, reduce production costs.
In the method for the invention, when the material in continuous vacuum condensing crystallizing is heated and then temperature improves 8 ~ 10 ℃, in continuous vacuum condensing crystallizing device, the evaporation rate of feed liquid will be enhanced, and the solid content of feed liquid promotes rapidly, can accelerate discharging speed like this, improve quantum of output.
In the method for the invention, due to the raising of the evaporation rate of feed liquid in continuous vacuum condensing crystallizing device, thereby quantum of output will improve, and the primary crystallization rate of condensing crystallizing will improve, and producing yield will promote, and production cost will reduce.
In the method for the invention, when the water temperature of the mixing condenser recirculated water used in continuous vacuum concentration and crystallization device is promoted to 32 ℃ ~ 35 ℃ by normal 20 ℃ of left and right, even whether the blower fan for cooling circulating water can not opened or not and less, saved blower fan institute consuming electric power, further reduced production cost.
The invention is not restricted to these disclosed embodiment; the present invention is by the described scope of soverlay technique scheme; and the various distortion of claim scope and equivalence variation; do not departing under the prerequisite of technical solution of the present invention, any modification that those skilled in the art made for the present invention easily realize or improvement all belong to the present invention's scope required for protection.
Claims (5)
1. a method that improves feed liquid evaporation rate in continuous vacuum condensing crystallizing device, is characterized in that, it comprises the following steps:
Mixing condenser is connected with continuous vacuum condensing crystallizing device, recirculated water passes in mixing condenser, the water temperature of mixing condenser recirculated water used is promoted to 32 ℃ ~ 35 ℃ by normal 20 ℃ of left and right, thereby makes feed temperature in continuous vacuum condensing crystallizing device improve 8 ~ 10 ℃.
2. the method for feed liquid evaporation rate in raising continuous vacuum condensing crystallizing device as claimed in claim 1, is characterized in that, described continuous vacuum condensing crystallizing device is connected with a heater.
3. the method for feed liquid evaporation rate in raising continuous vacuum condensing crystallizing device as claimed in claim 2, is characterized in that, described continuous vacuum condensing crystallizing device is connected with first steam jet pump.
4. the method for feed liquid evaporation rate in raising continuous vacuum condensing crystallizing device as claimed in claim 3, is characterized in that, described heater, the first steam jet pump are all connected with second steam jet pump.
5. the method for feed liquid evaporation rate in raising continuous vacuum condensing crystallizing device as claimed in claim 1, is characterized in that, the feed liquid displays temperature in described continuous vacuum condensing crystallizing device is 26 ℃ ~ 29 ℃.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687047A (en) * | 2005-05-09 | 2005-10-26 | 天津大学 | Equipment and method for preparing crystal of vitamin C by fine crystal removing method |
| CN101397286A (en) * | 2008-11-18 | 2009-04-01 | 江苏江山制药有限公司 | Method for continuous crystallisation of vitamin C |
| JP4731980B2 (en) * | 2005-04-27 | 2011-07-27 | 株式会社カネカ | Method and system for crystallizing sterols |
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2013
- 2013-12-18 CN CN201310693096.XA patent/CN103638689A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4731980B2 (en) * | 2005-04-27 | 2011-07-27 | 株式会社カネカ | Method and system for crystallizing sterols |
| CN1687047A (en) * | 2005-05-09 | 2005-10-26 | 天津大学 | Equipment and method for preparing crystal of vitamin C by fine crystal removing method |
| CN101397286A (en) * | 2008-11-18 | 2009-04-01 | 江苏江山制药有限公司 | Method for continuous crystallisation of vitamin C |
Non-Patent Citations (2)
| Title |
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| 冯敏: "《现代水处理技术》", 30 November 2012, 化学工业出版社 * |
| 时钧等: "《化学工程手册》", 31 January 1996, 化学工业出版社 * |
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Application publication date: 20140319 |