WO2006025355A1 - 精留装置、及びこれを用いた精留方法 - Google Patents
精留装置、及びこれを用いた精留方法 Download PDFInfo
- Publication number
- WO2006025355A1 WO2006025355A1 PCT/JP2005/015709 JP2005015709W WO2006025355A1 WO 2006025355 A1 WO2006025355 A1 WO 2006025355A1 JP 2005015709 W JP2005015709 W JP 2005015709W WO 2006025355 A1 WO2006025355 A1 WO 2006025355A1
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- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- rectification
- treated
- neutralizing agent
- rectifying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/008—Liquid distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
- B01D1/305—Demister (vapour-liquid separation)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/10—Vacuum distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/26—Fractionating columns in which vapour and liquid flow past each other, or in which the fluid is sprayed into the vapour, or in which a two-phase mixture is passed in one direction
Definitions
- the present invention relates to a rectifying apparatus for separating and recovering an organic solvent from a liquid to be treated containing an organic solvent and an alkaline or acidic volatile component, and a rectifying method using the same.
- Waste liquids produced in the fermentation industry and the like often contain organic solvents in addition to water and organic substances such as non-volatile amino acids and salts.
- the organic solvent in the waste liquid is preferably separated and recovered using a rectification tower during the waste liquid treatment and reused.
- the waste liquid may contain alkaline or acidic volatile components in addition to the above components.
- a neutralizing agent (acid or alkali) that neutralizes the volatile components in advance is added to the liquid to be treated. It suppresses volatilization of components (Patent Document 1 etc.).
- Patent Document 1 JP-A-7-145140
- the liquid to be treated contains a large amount of organic substances such as non-volatile amino acids and salts that buffer the pH, the liquid to be treated has a desired pH. Therefore, a large amount of neutralizing agent that is difficult to adjust stably is required. As a result, the rectifying column bottom liquid contains a large amount of the added neutralizing agent salt, which requires labor and cost.
- a neutralizing agent for alkaline volatile components phosphoric acid, which has little influence on the rectification column, is widely used. In this case, the bottom of the column is prevented by inhibiting neutralization by organic substances such as amino acids and salts. There is a problem that a large amount of phosphorus is contained in the liquid, and the processing requires labor.
- the present invention has been made in view of the circumstances, and it is possible to rectify a liquid to be treated containing an organic solvent and an alkaline or acidic volatile component without using a large amount of a neutralizing agent.
- An object of the present invention is to provide a rectifying apparatus capable of stably collecting volatile components on the recovery side and separating and recovering a high-purity organic solvent, and a rectifying method using the same. Means for solving the problem
- the rectifying apparatus of the present invention is a rectifying apparatus for supplying a liquid to be treated containing an organic solvent and an alkaline or acidic volatile component to a rectifying column, and separating and recovering the organic solvent.
- a neutralizing agent charging means for charging a neutralizing agent for neutralizing the volatile component is provided on the tower top side from the liquid supply position of the liquid to be treated.
- a detecting means for detecting the volatile component in the recovered liquid withdrawn from the rectification column, and based on the detection result, the neutralizing agent feeding means It is preferable to control the amount of the additive.
- pH measuring means for measuring the pH of the liquid to be treated is provided, and the amount of the neutralizing agent input by the neutralizing agent input means is controlled based on the measurement result.
- the rectification method of the present invention is a rectification method in which a liquid to be treated containing an organic solvent and an alkaline or acidic volatile component is supplied to a rectification column, and the organic solvent is separated and recovered. A rectification is performed by introducing a neutralizing agent for neutralizing the volatile components to the tower top side from the liquid supply position of the liquid to be treated.
- the present invention when rectifying a liquid to be treated containing an organic solvent and an alkaline or acidic volatile component, volatile components in the recovered liquid can be stably used without using a large amount of a neutralizing agent.
- a rectification apparatus capable of suppressing the mixing of water and separating and recovering a high-purity organic solvent, and a rectification method using the rectification apparatus.
- FIG. 1 is a diagram showing a configuration of a rectifying apparatus according to an embodiment of the present invention.
- FIG. 2 is a diagram showing a correlation between ammonia concentration and electric conductivity.
- FIG. 3 is a diagram showing an operation example of the embodiment according to the present invention.
- the rectifying apparatus 1 of the present embodiment is mainly composed of a rectifying column 10 for rectifying a liquid to be treated containing an organic solvent and an alkaline or acidic volatile component.
- the liquid to be processed is supplied to the middle stage of the rectification column 10 via the liquid supply line 20 to be processed.
- steam is supplied to the bottom of the rectifying column 10 via the steam supply line 30 as a heating source.
- the organic solvent having a low boiling point in the rectifying column 10 is evaporated and is extracted from the recovery line 40 toward the top of the column.
- the extracted vapor containing the organic solvent is condensed in the condenser 42 in the middle of the recovery line 40 to be recovered in the form of condensate.
- a part of the recovered liquid is returned to the distillation column 10 via the reflux line 50, and a part is recondensed by the condenser 42 via the reflux line 60.
- the residue at the bottom of the rectifying column 10 is withdrawn via a waste liquid line 80 and treated as waste liquid.
- the composition of the liquid to be treated is not particularly limited as long as it contains an organic solvent and an alkaline or acidic volatile component.
- the organic solvents include methanol, ethanol, and acetone.
- the alkaline volatile component include ammonia
- examples of the acidic volatile component include sulfurous acid gas.
- the waste liquid from the fermentation industry includes water, organic substances such as non-volatile amino acids, and salts.
- a flow rate indicating controller 21 is attached to the liquid supply line 20 to be treated, so that, for example, 0.1 to: L0m 3 Zh (time) Usually, it is held almost constant.
- the characteristics of the steam are not particularly limited, but those having a steam pressure of 0.40-0.45 PaG (Pascal gauge) are usually preferably used.
- a flow rate indicating controller 31 is attached to the steam supply line 30 and is usually kept substantially constant within a range of 0.1 to 3 tZ h, for example.
- PaG indicates gauge pressure (the same applies hereinafter)
- the extraction amount of the recovered liquid is not particularly limited, but is usually adjusted so as to keep the middle temperature of the rectifying column 10 constant. Since the liquid composition in the rectifying column is almost determined by the rectifying temperature under the same pressure, the composition of the recovered liquid can be stabilized by keeping the middle temperature of the rectifying column 10 constant. it can.
- a temperature indicator 11 is attached to the middle stage of the distillation column 10, and a flow rate indicator 41 is attached to the recovery line 40, respectively.
- the temperature indicator 11 has a function of controlling the flow rate indicating controller 41, and based on the measurement result of the temperature indicator 11, the flow rate indicating controller 41 performs cascade control of the withdrawal amount of the recovered liquid. It has become.
- a neutralizing agent charging line (neutralizing agent charging means) 70 for charging a neutralizing agent into the rectifying column 10 is provided.
- This inlet 70A is located on the top side of the liquid supply port 20A for the liquid to be treated.
- a neutralizing agent was added to the liquid to be treated, but in this embodiment, the neutralizing agent is directly fed into the rectifying column 10 to perform rectification.
- the input position is set on the tower top side from the supply position of the liquid to be treated.
- the neutralizer charging position (input 70A) is at the top of the column from the liquid supply position (liquid supply 20A) of the liquid to be treated. Any position may be used as long as it is on the side, but a higher one is preferred. Specifically, if the height of the liquid supply position of the liquid to be treated is Ha and the height of the top of the tower is Hb, the height of the neutralizer charging position is Ha + (Hb-Ha) X 1Z2 or more In particular, Ha + (Hb—Ha) X 3Z4 or more is preferable.
- a liquid redispersion device is provided, and the charging port 70A is provided at a position above the liquid supply stage. However, if the liquid re-dispersion device is located above the liquid supply stage, the inlet 70A may be provided at the position of the liquid re-dispersion device.
- the neutralizing agent used in the present embodiment is not particularly limited, but when the volatile component is an alkaline volatile component such as ammonia, an acid such as sulfuric acid, hydrochloric acid, or phosphoric acid can be used. Among these, phosphoric acid that has little influence on the rectifying column 10 such as corrosion is preferably used. In addition, when the volatile component is an acidic volatile component such as sulfurous acid gas, alkali such as sodium hydroxide is cited. The neutralizing agent is put into the rectification column 10 in the form of an aqueous solution or the like.
- the organic solvent contained in the liquid to be treated charged into the rectifying column 10 is evaporated and directed to the top of the rectifying column 10, and organic substances such as non-volatile amino acids and salts are Head toward the bottom of the tower. Further, at least a part of the alkaline or acidic volatile component contained in the liquid to be treated is volatilized and goes to the top of the column together with the organic solvent.
- the neutralizing agent is introduced to the tower top side from the liquid supply position of the liquid to be treated, the volatile components that are directed toward the tower top side are neutralized and ionized. By doing so, it is possible to return to the bottom of the column and suppress the mixing of alkaline or acidic volatile components into the recovered liquid.
- all or most of non-volatile amino acids and other organic substances and salts that may inhibit neutralization are located below the supply position of the liquid to be treated, that is, below the position where the neutralizer is charged. Therefore, they do not come into direct contact with the neutralizing agent that has been added above the liquid supply position of the liquid to be treated.
- the rectification apparatus 1 of the present embodiment includes an electric conductivity indicator in a reflux line 50 that detects alkaline or acidic volatile components in the recovered liquid extracted from the rectification column 10. (Detection means) 51 is attached.
- the electrical conductivity indicator 51 can also be installed in the recovery line 40 that is not in the reflux line 50.
- the frequency of measurement by the electrical conductivity indicator 51 is not limited, it is preferable to measure continuously or periodically and to monitor constantly or regularly. Since the composition of the liquid to be treated varies, the concentration of alkaline or acidic volatile components contained therein also varies. Therefore, by monitoring the concentration of the alkaline or acidic volatile component in the recovered liquid, it is possible to immediately detect the increase or decrease in the alkaline or acidic volatile component in the treatment liquid.
- the amount of the neutralizing agent input is the minimum necessary or close to it. It is possible to stably suppress the mixing of alkaline or acidic volatile components into the recovered liquid.
- the amount of neutralizing agent input is increased accordingly, and if the indicated value by the conductivity indicator 51 decreases, it is determined that the neutralizing agent is excessive. Therefore, the amount of neutralizing agent input is reduced and adjusted so that the electrical conductivity is within the specification.
- a flow rate indicating controller 71 is attached to the neutralizing agent charging line 70, and the electric conductivity indicating meter 51 has a function of controlling the flow indicating controller 71. Based on the detection result of the electrical conductivity indicator 51, the flow rate indicator controller 71 automatically performs cascade control of the neutralizing agent input amount. For control, it is preferable to employ sample value PI control or the like to compensate for dead time.
- the electrical conductivity standard may be designed as appropriate. For example, when ammonia is the target.
- the amount of alkaline or acidic volatile components in the recovered liquid is monitored by the electrical conductivity indicator 51, the amount of alkaline or acidic volatile components in the liquid to be treated is suddenly increased. Therefore, even when the amount of alkaline or acidic volatile components in the recovered liquid deviates significantly from the standard value, it is possible to take quick measures such as changing the destination of the recovered liquid, and to stabilize the quality of the recovered liquid. Can be ashamed.
- a pH indicator (pH measuring means) 22 for measuring the pH of the liquid to be processed is attached to the liquid supply line 20 to be processed. Based on the measurement result, the flow rate indicating controller 71 controls the feed amount of the neutralizing agent in a feedforward manner.
- the frequency of measurement by the pH indicator 22 is not limited, but it is preferable to measure continuously or regularly and monitor constantly or regularly.
- the neutralizing agent is applied to the top of the column from the liquid supply position of the liquid to be processed in the rectifying column 10. Since it uses a structure to be charged, stable use of a large amount of neutralizing agent is achieved, and the collection of alkaline or acidic volatile components on the recovery side is suppressed and high-purity organic solvents are separated and recovered. be able to In the present embodiment, it is only necessary to add the neutralizing agent in an amount necessary or close to it, so that the amount of the neutralizing agent to be used can be remarkably reduced, which is economical. In addition, the treatment of the bottom liquid can be remarkably simplified.
- rectifying apparatus 1 is merely an embodiment, and can be appropriately modified in design without departing from the spirit of the present invention.
- an indirect heating method in which the inside of the rectification tower is indirectly heated with steam may be employed.
- the concentration of alkaline or acidic volatile components in the recovered liquid can be monitored by sampling the recovered liquid and analyzing it by gas chromatography or the like. it can.
- liquid to be treated includes only one of the alkaline and acidic volatile components
- present invention is also applicable to the liquid to be treated containing both of them. Noh.
- both a rectifying device that neutralizes alkali volatile components and a rectifying device that neutralizes acidic volatile components by using both a rectifying device that neutralizes alkali volatile components and a rectifying device that neutralizes acidic volatile components, and sequentially performing the treatment, mixing of both volatile components into the recovery side can be suppressed.
- mixing of both volatile components into the recovery side can be suppressed.
- ammonia water with different concentrations was prepared, and the electrical conductivity was measured with an electrical conductivity meter (CM-21P, manufactured by Toa D-keichi Co., Ltd.). It investigated by measuring.
- CM-21P manufactured by Toa D-keichi Co., Ltd.
- the feed port for the liquid to be treated was provided at a stage with a lower force of about 1Z2, and the inlet for the neutralizer was installed at a stage with a lower force of about 3Z4.
- composition of the liquid to be treated at the start of operation is about 47% by weight of water and about 53% by weight of methanol.
- a 75 wt% aqueous phosphoric acid solution was used as the acid charged into the rectification column.
- the standard for the electrical conductivity of the recovered liquid was set to 0 to 3 SZcm (corresponding to an ammonia concentration of 0 to 0.05 mg / L).
- Fig. 3 shows the pH of the liquid to be treated and the amount of liquid supplied, the indicated value of the electric conductivity meter, and the amount of phosphoric acid injected after the operation was started.
- the amount of phosphoric acid aqueous solution is directly used as the amount of phosphoric acid.
- the rectification tower of the present invention and the rectification method using the rectification column can be preferably applied to the treatment of waste liquid containing an organic solvent and alkaline or acidic volatile components discharged from fermentation industry or the like.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Water Treatments (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006532697A JPWO2006025355A1 (ja) | 2004-08-31 | 2005-08-30 | 精留装置、及びこれを用いた精留方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-252524 | 2004-08-31 | ||
| JP2004252524 | 2004-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006025355A1 true WO2006025355A1 (ja) | 2006-03-09 |
Family
ID=36000007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/015709 Ceased WO2006025355A1 (ja) | 2004-08-31 | 2005-08-30 | 精留装置、及びこれを用いた精留方法 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPWO2006025355A1 (ja) |
| WO (1) | WO2006025355A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947074A (zh) * | 2018-08-31 | 2018-12-07 | 南通江山农药化工股份有限公司 | 草甘膦生产线中甲醛废水的处理方法及其装置 |
| CN111790172A (zh) * | 2020-07-29 | 2020-10-20 | 濮阳市盛源能源科技股份有限公司 | 一种溶剂蒸馏回收系统及使用方法 |
| JP2020185502A (ja) * | 2019-05-10 | 2020-11-19 | 有限会社アイシー産業 | リサイクル有機溶剤の製造方法、および、不純物含有有機溶剤中の不純物量を減らすための装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11207093A (ja) * | 1998-01-29 | 1999-08-03 | Mitsubishi Heavy Ind Ltd | 溶剤回収・再生装置及び該溶剤回収・再生装置を具備するドライクリーニング装置 |
| JP2002301301A (ja) * | 2001-04-03 | 2002-10-15 | Nippon Refine Kk | 廃溶剤の再生方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0763561B2 (ja) * | 1986-10-29 | 1995-07-12 | ケイエフエンジニアリング株式会社 | アセトン,ブタノ−ル及びエタノ−ル発酵液の蒸留法 |
-
2005
- 2005-08-30 WO PCT/JP2005/015709 patent/WO2006025355A1/ja not_active Ceased
- 2005-08-30 JP JP2006532697A patent/JPWO2006025355A1/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11207093A (ja) * | 1998-01-29 | 1999-08-03 | Mitsubishi Heavy Ind Ltd | 溶剤回収・再生装置及び該溶剤回収・再生装置を具備するドライクリーニング装置 |
| JP2002301301A (ja) * | 2001-04-03 | 2002-10-15 | Nippon Refine Kk | 廃溶剤の再生方法 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947074A (zh) * | 2018-08-31 | 2018-12-07 | 南通江山农药化工股份有限公司 | 草甘膦生产线中甲醛废水的处理方法及其装置 |
| JP2020185502A (ja) * | 2019-05-10 | 2020-11-19 | 有限会社アイシー産業 | リサイクル有機溶剤の製造方法、および、不純物含有有機溶剤中の不純物量を減らすための装置 |
| CN111790172A (zh) * | 2020-07-29 | 2020-10-20 | 濮阳市盛源能源科技股份有限公司 | 一种溶剂蒸馏回收系统及使用方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2006025355A1 (ja) | 2008-05-08 |
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