EP0878441B1 - Verfahren zur Befüllung und Entleerung von Lagertanks mit wässrigen Dispersionen - Google Patents
Verfahren zur Befüllung und Entleerung von Lagertanks mit wässrigen Dispersionen Download PDFInfo
- Publication number
- EP0878441B1 EP0878441B1 EP19980107387 EP98107387A EP0878441B1 EP 0878441 B1 EP0878441 B1 EP 0878441B1 EP 19980107387 EP19980107387 EP 19980107387 EP 98107387 A EP98107387 A EP 98107387A EP 0878441 B1 EP0878441 B1 EP 0878441B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filling
- storage tank
- dispersions
- employed
- aqueous dispersions
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/061—Means for transferring liquids from a chosen level of a storage container
- B67D7/062—Means for transferring liquids from a chosen level of a storage container from the free surface level of the liquid
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86236—Tank with movable or adjustable outlet or overflow pipe
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86236—Tank with movable or adjustable outlet or overflow pipe
- Y10T137/86252—Float-supported outlet
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86348—Tank with internally extending flow guide, pipe or conduit
- Y10T137/86372—Inlet internally extending
Definitions
- the present invention relates to an improved method for filling and emptying storage tanks with aqueous Dispersions, whereby the storage tank is emptied via a line, the opening of which is in the lower part of the storage tank.
- Aqueous polymer dispersions such as those used for a large number of applications, such as. in the paint, adhesive industry, etc. used must meet increased quality requirements.
- One of these quality requirements is their durability.
- first in - first out the so-called "first in - first out” principle fulfill. This means that the first placed in the storage tank Product parts are also correspondingly removed later be dissipated first to prevent aging of parts of the To avoid product.
- stirred storage tanks In order to minimize these problems, stirred storage tanks are suggested. Stirred storage tanks, however, are expensive and maintenance-intensive. Larger storage tanks, the contents of which are mixed by stirring have to be specially stiffened. Can too here to dry on the stirrer shaft or the stirrer blades come. Air can also enter the dispersion by stirring be entered, which is undesirable.
- a method for filling and emptying Storage tanks with aqueous dispersions taking the storage tank emptied via a line, the opening of which is in the lower part of the storage tank, which is characterized by is that you fill the storage tank with another line, the outlet opening in the storage tank in the level changes of the liquid surface Filling and removal processes follow, whereby the level of Exit opening adjusts so that the opening is approximately in Height of the liquid level.
- the method according to the invention advantageously enables one Handling of the stored aqueous dispersions according to the principle first in - first out.
- swimming proboscis which are also used as swimming suction systems or Floating suction probes are used to fill the storage tank.
- These proboscis are usually made of flexible or rigid elements that are flexible via one or more swivel joints are interconnected, causing a change in length similar to a scissors principle is possible.
- Such proboscis are already known and are for example from the companies Emco in Kirchhain, Connex in Kamen and Schwelm distributed in Schwelm.
- the outlet opening the filling line advantageously the level changes of follow liquid floating.
- the buoyancy behavior can be affected by different sized buoyancy bodies to be changed. It is advantageously used however fillable floats that adapt to the density of the product to be stored with e.g. Water, diethylene glycol or other substances, e.g. Metal balls, filled and balanced become. In this way, the immersion depth of the Advantageously change the filling line and optimize it for specific products.
- the floats can be any geometric Have shapes. Floating balls or conical ones are preferred Floats, the tapered end of which dips into the dispersion, which may be arranged in pairs. Particularly preferred are hollow bodies made of stainless steel. Usually the proboscis held by one or two floats.
- the storage tanks are usually still emptied from below.
- the balance of the float (s) and thus the immersion depth the end of the filling line advantageously allows a largely foam-free filling of the storage tanks. So that will a drying of foam and the formation of coagulate avoided.
- Hollow bodies made of various are suitable as floating bodies Materials e.g. Plastic (polypropylene, polyethylene) or Stainless steel (V2A, V4A), or also rubberized or coated Steel container.
- Foam floats are also suitable Plastics that may be coated. In the simplest embodiment become plastic tanks with closed lids used.
- the floating body is preferably deflectable with the Filling line connected.
- the float is usually flexibly connected to the end of the filling line, the filling line can also pass through the float.
- the outlet opening of the filling line is advantageously located just below the liquid surface, preferably about 50 to 200 mm below the liquid level, the outlet opening a cross-sectional area that is the single to multiple cross-section corresponds to the filling line.
- the outlet opening of the Filling line can also be located just above the liquid surface are located, the height is to be chosen so that it there is no undesirable foaming.
- the foaming but is also dependent on the cross section of the filling line and the volume flow of the dispersion with which the storage tank is filled , the diameter of the filling line is preferably 50 to 200 mm, particularly preferably 80 to 150 mm or is 100 mm.
- Geometric design of the outlet opening, the filling under or via mirror and volume flow, the parameters are product-specific can be optimized through routine tests.
- Preferred positions of the outlet opening depend among other things. of the viscosity and foaming tendency of the dispersion used from.
- the outlet opening can be changed by routine tests, for example, several openings are also through bifurcations and branches possible.
- the outlet opening is preferably in the middle of the Liquid level to ensure a uniform spreading of the dispersion in all directions.
- the outlet opening is at End of the swimming trunk attached via a swivel so that the Cross-sectional area of the opening parallel to the liquid level stands.
- the outlet opening can e.g. be bell-shaped.
- a baffle plate can preferably be mounted in front of the outlet opening be, whereby the product jet is fanned out and on the surface better distributed.
- This baffle is preferred height adjustable and with the end of the filling line, for example fastened by screw connections.
- Especially standing cylindrical storage tanks are expedient preferred, but it can also square, rectangular storage tanks or oval cross-section can be used. Likewise lying cylindrical or rectangular containers can also be advantageous operated in the manner described. Cylindrical storage tanks are advantageously used, the diameter should be chosen so that the Filling the spreading dispersion up to the wall arrives. Standing cylindrical storage tanks are advantageous used, where the inside diameter of the storage tank in Relationship to the diameter of the outlet opening of the filling line is in a range from 10 to 120, preferably 20 to 50.
- the storage containers are filled and emptied in the Usually by pumping the dispersions.
- the filling and emptying lines can advantageously be designed piggable if necessary become.
- Figures 1 to 3 show exemplary arrangements according to the method according to the invention.
- the bottom of the storage tank is designed with a slope that the Liquid is led to the sampling line (8).
- FIG. 2a shows a similar arrangement.
- the outlet opening (5) is here above the liquid surface (8).
- FIG. 2b shows a baffle plate mounted by means of struts (10) (9) at the outlet opening (5).
- the angle ⁇ can be optimized by a routine experiment in order to good and even spreading of the dispersion when filling achieve.
- a baffle plate can be seen in FIG. 2c, the distance H of the Baffle plate from the outlet opening by means of the elongated hole 11 can be adjusted.
- the baffle has one or more holes. It can also be made of perforated sheet.
- baffle plate Preferred designs of the baffle plate can be made by a person skilled in the art Routine attempts can be determined.
- Routine attempts can be determined.
- the angle ⁇ are in particular the diameter of the storage tank and viscosity and foaming tendency of the dispersion is important.
- Figure 3 shows a similar arrangement in which a flexible Line (2) is used, which by means of an eyelet (3) and the guide rope (10) tensioned by the fastening eyes (9) is controlled.
- the outlet opening (5) is above the Liquid levels (6).
- Dispersions are no preservatives or preservatives obtained in a relatively low concentration. For example, this is the case when the dispersions for further processing be temporarily stored.
- Such preservatives will for example in JOCCA, 1991 (9), pages 324-328.
- Suitable preservatives are e.g. Formulations of the 1,2-Benzisothiazolin-3-one sodium salts in a mixture Water and propylene glycol, e.g. Proxel XL2, from ICI, Formulations of biocidal (chlorine) isothiazolones, e.g. Acticide LA from THOR CHEMIE GmbH, Kathon LX plus from ROHM & HAAS.
- Aqueous dispersions based on the above Kind stored advantageously can be e.g.
- Dispersions based on ethylenically unsaturated Connections such as based on (meth) acrylic acid esters, Butadiene, styrene, vinyl acetate, (meth) acrylamide, Acrylonitrile, (meth) acrylic acid etc. Such dispersions are known.
- the dispersions can optionally be made up.
- the aqueous dispersions can have the character of intermediate products have, but they can also be used products e.g. are available in pigmented form for painting purposes.
- Packaging materials are e.g. Diols such as butyl glycol, Butyl diglycol, diethylene glycol, alcohols such as e.g. Ethanol, iso-propanol and octadecanol-1, solvents such as Lusolvan FBH (BASF AG), complexing agents e.g. based on ethylenediaminetetraacetic acid, e.g. Trilon B liquid (BASF AG), synthetic Resin solutions such as aqueous solutions of polyvinyl methyl ethers, such as. Lutonal M 40 (BASF AG), solutions of ammonium polyacrylates, such as. Collacral P (BASF AG), plasticizers, such as e.g.
- Diols such as butyl glycol, Butyl diglycol, diethylene glycol, alcohols such as e.g. Ethanol, iso-propanol and octadecanol-1
- solvents such as Lusolvan FBH
- Dibutyl phthalate e.g. Palatinol C (BASF AG)
- anionic Dispersions of montan ester wax e.g. lubricant dispersion 8645 (BASF AG)
- chemical compounds such as e.g. urea and ethylene urea, sodium hydroxide solution, potassium hydroxide solution, ammonia, calcium hydroxide.
- block copolymers based on propylene and ethylene oxide defoamers such as.
- Dapro DF 900 from KRAHN CHEMIE GmbH and Byk-033 from BYK-CHEMIE GmbH, Wesel, Nopo 8034 E / D from HENKEL KGaA, Compounds such as benzophenone, solvents such as white spirit and Acetone, polyvinyl alcohols etc., modified rosins, such as. Tacolyn 3179 from HERCULES, Permatac A751 from ALLIANCE TEHCNICAL PRODUCTS (ATP), Snowtac types from AKZO NOBEL.
- the method according to the invention is also particularly suitable for the storage of higher viscosity products.
- the viscosities are in in this case at more than 500 mPas, preferably above 5000 mPas, particularly preferably over 7000 mPas.
- the water content of the aqueous polymer dispersions is preferred between 20 and 80% by weight.
- the dispersions can be (co) polymers in dispersed form contain. They preferably contain at least one monomer of the following monomer groups: (meth) acrylic acid ester, (Meth) acrylic acid, butadiene, styrene, vinylidene chloride, acrylonitrile, Vinyl acetate.
- the aqueous dispersions preferably have a pH of over 3, particularly preferably over 5, very particularly preferred over 7.
- Dispersions can advantageously be used in the process according to the invention Processes are used that have a biocide concentration of less than 1000 ppm, preferably less than 50 ppm.
- the method according to the invention enables a process engineering simple and economical storage of watery Dispersions.
- the aging of parts is advantageous the stored dispersion avoided and thus a permanent high quality guaranteed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Devices For Dispensing Beverages (AREA)
Description
Claims (9)
- Verfahren zur Befüllung und Entleerung von Lagertanks mit wäßrigen Dispersionen, wobei man den Lagertank (7) über eine Leitung (8) entleert, deren Öffnung sich im unteren Teil des Lagertanks befindet, dadurch gekennzeichnet, daß man den Lagertank mit einer anderen Leftung (1) befüllt, deren Austrittsöffnung (5) im Lagertank den Niveauänderungen der Flüssigkeitsoberfläche bei Befüll- und Entnahmevorgängen folgt, wobei man das Niveau der Austrittsöffnung so einstellt, daß sich die Öffnung in etwa in Höhe des Flüssigkeitsspiegels (6) befindet.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man ungerührte Lagertanks verwendet.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man zur Befüllung des Lagertanks ein- oder mehrgelenkige Schwimmrüssel (3) einsetzt.
- Verfahren gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß man Dispersionen mit einem Wasseranteil von 20 bis 80 Gew.-% zur Lagerung einsetzt.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die wäßrigen Dispersionen (Co)polymerisate in dispergierter Form enthalten, die mindestens ein Monomeres der folgenden Monomergruppen enthalten: (Meth)acrylsäureester, (Meth)acrylsäure, Butadien, Styrol, Vinylidenchlorid, Acrylnitril, Vinylacetat.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß man wäßrige Dispersionen mit einem pH-Wert von über 3, bevorzugt einen pH-Wert von über 5 einsetzt.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß man wäßrige Dispersionen mit einem pH-Wert größer als 7 einsetzt.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß man wäßrige Dispersionen mit einer Biozidkonzentration von weniger als 1000 ppm, bevorzugt von weniger als 100 ppm, einsetzt.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß man wäßrige Dispersionen mit einer Biozidkonzentration von weniger als 50 ppm einsetzt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997120070 DE19720070A1 (de) | 1997-05-14 | 1997-05-14 | Verfahren zur Befüllung und Entleerung von Lagertanks mit wäßrigen Dispersionen |
| DE19720070 | 1997-05-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0878441A1 EP0878441A1 (de) | 1998-11-18 |
| EP0878441B1 true EP0878441B1 (de) | 2003-06-25 |
Family
ID=33103725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19980107387 Expired - Lifetime EP0878441B1 (de) | 1997-05-14 | 1998-04-23 | Verfahren zur Befüllung und Entleerung von Lagertanks mit wässrigen Dispersionen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5971036A (de) |
| EP (1) | EP0878441B1 (de) |
| JP (1) | JPH10324397A (de) |
| DE (2) | DE19720070A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29822803U1 (de) * | 1998-12-22 | 2000-05-04 | Brauerei Beck GmbH & Co, 28199 Bremen | Vorrichtung zum verwirbelungsarmen Einbringen einer Flüssigkeit in einen Flüssigkeitsbehälter |
| US6807952B1 (en) * | 2003-07-22 | 2004-10-26 | Ti Group Automotive Systems, L.L.C. | Fuel tank and fuel flow control device |
| CA2939565C (en) | 2007-10-25 | 2018-05-01 | Landmark Ip Holdings, Llc | System and method for anaerobic digestion of biomasses |
| CN114524403B (zh) * | 2022-02-18 | 2024-01-23 | 华能新疆能源开发有限公司新能源东疆分公司 | 一种减速箱电动加油工具 |
| FI131748B1 (en) * | 2022-07-14 | 2025-11-04 | Kemira Oyj | Biocide control in paper making |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1115791A (en) * | 1912-10-18 | 1914-11-03 | Rotico Fitting & Supply Company | Flush-tank. |
| US1668793A (en) * | 1926-10-06 | 1928-05-08 | John H Wiggins | Adjustable swing pipe for liquid-storage tanks |
| FR1457558A (fr) * | 1965-09-13 | 1966-01-24 | Exxon Standard Sa | Prélèvements homogènes dans un liquide stocké |
| FR1550616A (de) * | 1967-12-22 | 1968-12-20 | ||
| GB1207900A (en) * | 1968-03-21 | 1970-10-07 | Cotto Scunthorpe Ltd | Improvements in or relating to beverage vending machines |
| US5640994A (en) * | 1991-11-06 | 1997-06-24 | Kvaerner Pulping Technologies Aktiebolag | Liquid reservoir |
-
1997
- 1997-05-14 DE DE1997120070 patent/DE19720070A1/de not_active Withdrawn
-
1998
- 1998-04-15 US US09/060,104 patent/US5971036A/en not_active Expired - Lifetime
- 1998-04-23 DE DE59808787T patent/DE59808787D1/de not_active Expired - Lifetime
- 1998-04-23 EP EP19980107387 patent/EP0878441B1/de not_active Expired - Lifetime
- 1998-05-11 JP JP12754298A patent/JPH10324397A/ja not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US5971036A (en) | 1999-10-26 |
| EP0878441A1 (de) | 1998-11-18 |
| JPH10324397A (ja) | 1998-12-08 |
| DE19720070A1 (de) | 1998-11-19 |
| DE59808787D1 (de) | 2003-07-31 |
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