NO124239B - - Google Patents
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- Publication number
- NO124239B NO124239B NO5170/68A NO517068A NO124239B NO 124239 B NO124239 B NO 124239B NO 5170/68 A NO5170/68 A NO 5170/68A NO 517068 A NO517068 A NO 517068A NO 124239 B NO124239 B NO 124239B
- Authority
- NO
- Norway
- Prior art keywords
- vessel
- water
- dosing
- paste
- outlet
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 22
- 239000000920 calcium hydroxide Substances 0.000 claims description 22
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 22
- 239000013505 freshwater Substances 0.000 claims description 8
- 235000015927 pasta Nutrition 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 19
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 101150114468 TUB1 gene Proteins 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/687—Devices for dosing solid compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
Fremgangsmåte og anlegg for dosering Method and facility for dosing
av kalsiumhydroksyd i vann. of calcium hydroxide in water.
Foreliggende oppfinnelse går ut på å tilveiebringe en fremgangsmåte og et anlegg for nøyaktig og pålitelig dosering av kalsiumhydroksyd Ca(0H)2i vann, nærmere bestemt i forbindelse med rensing av vann. The present invention is to provide a method and a plant for accurate and reliable dosing of calcium hydroxide Ca(OH)2 in water, more specifically in connection with water purification.
Lesket kalk Ca(0H)2i pulverform har den egenskap å ville absorbere fuktighet og også kulldioksyd fra den omgivende luft, hvilket gjør at pulveret får egenskaper som vanskeliggjør dose- Slaked lime Ca(OH)2 in powder form has the property of wanting to absorb moisture and also carbon dioxide from the surrounding air, which means that the powder acquires properties that make it difficult to dose
ring. Ved å innføre den leskete kalk i et kar og blande det med en passende mengde vann, får kalsiumhydroksydet en pastalignende konsistens og beholder denne konsistens uendret i lang tid, forut- ring. By introducing the slaked lime into a vessel and mixing it with an appropriate amount of water, the calcium hydroxide acquires a paste-like consistency and retains this consistency unchanged for a long time, provided
satt at ingen nevneverdig fordampning av vannet kan finne sted. set that no significant evaporation of the water can take place.
Fremgangsmåten lifølge oppfinnelsen karakteriseres ved The method according to the invention is characterized by
at et trykkar fylles delvis med vann og kalsiumhydroksyd i slike proporsjoner at en pastaliknende masse oppnås, hvilken tillates å innstille seg med tilnærmet horisontal øvre overflate, og at nytt ferskvann tilføres ovenfor pastaens overflate i direkte kontakt med denne slik at det gjenværende indre rommet i trykkaret fylles, hvorved luft tvinges til å gå bort fra karets topp, slik at fyllingen av karet blir fullstendig og noe luft ikke forblir innestengt i karet, samt at dosering finner sted ved at et volum ferskt trykkvann, som tilsvarer det ønskete doseringsvolum, til-føres til karet ovenfor pastaens øvre overflate, idet tilsvarende pastavolum presses ut gjennom et utløp, mens karets innhold utsettes for fibrasjon for å lette settingen av den pastaliknende massen og for å minske friksjonen. that a pressure vessel is partially filled with water and calcium hydroxide in such proportions that a paste-like mass is obtained, which is allowed to settle with an approximately horizontal upper surface, and that new fresh water is added above the surface of the paste in direct contact with it so that the remaining internal space in the pressure vessel is filled, whereby air is forced to leave the top of the vessel, so that the filling of the vessel is complete and no air remains trapped in the vessel, and that dosing takes place by adding a volume of fresh pressurized water, which corresponds to the desired dosing volume to the vessel above the upper surface of the paste, the corresponding volume of paste being pushed out through an outlet, while the contents of the vessel are exposed to fibration to facilitate the setting of the paste-like mass and to reduce friction.
Anlegget ifølge oppfinnelsen karakteriseres generelt The plant according to the invention is generally characterized
ved at trykkaret ved sin øvre del er forsynt med en tilkoplingsbar fylleåpning for kalsiumhydroksyd og i sin topp med en lufteventil og at karets indre har en helt åpen væske forbindelse mellom innløpet og utløpet og at karet samvirker med en vibratoranordning, anordnet for å sette trykkaret i vibrasjon. in that the pressure vessel is provided at its upper part with a connectable filling opening for calcium hydroxide and in its top with an air valve and that the inside of the vessel has a completely open liquid connection between the inlet and the outlet and that the vessel cooperates with a vibrator device, arranged to place the pressure vessel in vibration.
Oppfinnelsen skal nå beskrives nærmere under henvisning til vedlagte tegning, som viser en utførelsesform for et trykkar, bestemt til å anvendes i forbindelse med foreliggende oppfinnelse. The invention will now be described in more detail with reference to the attached drawing, which shows an embodiment of a pressure vessel intended to be used in connection with the present invention.
I trykkaret, som på tegningen er betegnet med 1, innfø-res i et første trinn lesket kalk gjennom åpningen 2, og vann gjennom vannledningen 4. Vannets volum er mindre enn karets, og bør stå i et visst forhold til mengden av lesket kalk, som angitt i det følgende. In the pressure vessel, which is denoted by 1 in the drawing, slaked lime is introduced in a first step through the opening 2, and water through the water line 4. The volume of the water is smaller than that of the vessel, and should be in a certain ratio to the amount of slaked lime, as indicated below.
Deretter lukkes åpningen 2 lufttett med luken 3. The opening 2 is then closed airtight with the hatch 3.
Den leskete kalk blandes med vannet, slik at det dannes en pasta. Denne er betegnet med tallet 17, og danner en horisontal flate 18 i karet. Settingen av pastaen lettes hvis en vibrator 12 settes i virksomhet. The slaked lime is mixed with the water, so that a paste is formed. This is denoted by the number 17, and forms a horizontal surface 18 in the vessel. The setting of the paste is facilitated if a vibrator 12 is put into operation.
Fra vannledningen 4 fylles deretter karet 1 helt med friskt vann gjennom ventilen 5, hvorved luften tvinges til å strømme ut gjennom røret 6, som går ut fra toppen av beholderen via luftventilen 7. Når i stedet for luft vann strømmer ut gjennom røret 6, stenges ventilen 7, hvorved karet blir helt stengt og fritt for luft. For nøyaktig dosering er det hensiktsmessig at intet luftvolum er innestengt i noen luftlomme i karet. Det kan således bli nødvendig også ved den fortsatte anvendelse av From the water line 4, the vessel 1 is then completely filled with fresh water through the valve 5, whereby the air is forced to flow out through the pipe 6, which exits from the top of the container via the air valve 7. When instead of air, water flows out through the pipe 6, closed the valve 7, whereby the vessel is completely closed and free of air. For accurate dosing, it is appropriate that no air volume is trapped in any air pockets in the vessel. It may thus become necessary also in the case of the continued use of
karet å åpne ventilen 7 et øyeblikk for å slippe ut luft som even- the tub to open the valve 7 for a moment to let out any air that
tuelt har samlet seg i toppen av karet. Dosering foregår gjennom utløpet 8 i bunnen av karet, hvilket utløpsrør helder noe nedover frem til ventilen 9, som normalt er stengt. dirt has collected at the top of the tub. Dosing takes place through the outlet 8 at the bottom of the vessel, which outlet pipe runs slightly downwards until the valve 9, which is normally closed.
Åpnes denne ventil 9, blir anordningen klar for dosering. If this valve 9 is opened, the device is ready for dosing.
Foregår doseringen manuelt, settes vibratoren 12 i gang If dosing takes place manually, the vibrator 12 is started
og når ventilen 5 åpnes, trenger vann inn i karet på grunn av vanntrykket i ledningen 4. På grunn av det økede trykk i karet 1 presses kalsiumhydroksyd i pastaform ut gjennom utløpet i en meng- and when the valve 5 is opened, water penetrates into the vessel due to the water pressure in the line 4. Due to the increased pressure in the vessel 1, calcium hydroxide in paste form is pushed out through the outlet in a quantity
de med nøyaktig like stort volum som det volum friskt vann som trenger inn i karet 1. Ved å bestemme denne vannmengde som pres- those with exactly the same volume as the volume of fresh water that penetrates into vessel 1. By determining this amount of water as pres-
ses inn i karet ved hver dosering, kan hvilken som helst ønsket mengde kalsiumhydroksyd i pastaform doseres og slippes ut gjennom utløpet 9. Ved hver dosering synker pastaens nivå 18 svarende til det utmatede pastavolum, men forblir horisontalt på grunn av vibra-sjonen . is seen into the vessel at each dosing, any desired amount of calcium hydroxide in paste form can be dosed and discharged through the outlet 9. At each dosing, the level of the paste 18 drops corresponding to the volume of paste dispensed, but remains horizontal due to the vibration.
Doseringen kan også skje automatisk. Automatikken på- Dosing can also be done automatically. The automatic on-
virker da hensiktsmessig f=eks. en magnetventil 10, som er anbragt på ledningen 11, som forbinder vannledningen 4 med karet 1. then seems appropriate, e.g. a solenoid valve 10, which is placed on the line 11, which connects the water line 4 to the tub 1.
Ved å kombinere ledningens 11 gjennomstrømningsmotstand, vanntrykket i vannledningen 4 og magnetventilens 10 åpningstid riktig i forhold til hverandre, kan den ønskede mengde vann som trenger inn i beholderen 1 bestemmes på forhånd og således også By combining the flow resistance of the line 11, the water pressure in the water line 4 and the opening time of the solenoid valve 10 correctly in relation to each other, the desired amount of water that penetrates into the container 1 can be determined in advance and thus also
det utpressede pastavolum. the extruded pasta volume.
Magnetventilen skal da være styrt av det program som sty- The solenoid valve must then be controlled by the program that controls
rer den prosess som bestemmes av den ønskede kalkdosering. rer the process determined by the desired lime dosage.
For å hindre at friskt vann trenger inn i og passerer To prevent fresh water from entering and passing through
gjennom ansamlingen av kalsiumhydroksyd og direkte ut gjennom ut-løpet 8, samt for å hindre at kalken festner på innersiden av ka- through the accumulation of calcium hydroxide and directly out through the outlet 8, as well as to prevent the lime sticking to the inside of the
ret 1, anbringes den nevnte vibrator 12 utvendig på karet 1. ret 1, the aforementioned vibrator 12 is placed on the outside of the vessel 1.
Hvis vibratoren arbeider i forbindelse med doseringen, If the vibrator works in connection with the dosage,
oppnåes for det første at friksjonen mellom kalkpartiklene går over fra stillingsfriksjon til bevegelsesfriksjon, hvilket medfø- is achieved, firstly, that the friction between the lime particles changes from positional friction to movement friction, which
rer at det vil kreves et forholdsvis ubetydelig vanntrykk i led- means that a relatively insignificant water pressure will be required in the
ningen 4 for doseringen. For det annet oppnåes at kalkpastaen i karet 1 ikke festner på innersiden av beholderen, men får en nes- ning 4 for the dosage. Secondly, it is achieved that the lime paste in the tub 1 does not stick to the inside of the container, but gets a
ten horisontal og glatt overflate inne i beholderen. Herved kan dosering skje helt til kalsiumhydroksydet i pastaform tar helt slutt i karet. For å hindre at vibratorens vibrasjoner overføres fra beholderen til gulvet, er beholderens ben forsynt med vibra- ten horizontal and smooth surface inside the container. In this way, dosing can take place until the calcium hydroxide in paste form runs out completely in the vessel. To prevent the vibrator's vibrations from being transferred from the container to the floor, the container's legs are equipped with vibra-
sjonsdempere 13. Dessuten er vannledningene 4 og 11 og utløpsled-ningen 8 forsynt med vibrasjonsdempende forbindelser 14 resp. 15 og 16. sion dampers 13. In addition, the water lines 4 and 11 and the outlet line 8 are provided with vibration-damping connections 14 or 15 and 16.
Normalt bør vibreringen settes i gang noen få minutter før hver dosering for å gjøre pastaoverflaten glatt og plan og hindre at det friske vann, som trenger inn i karet trenger inn i og gjennom pastaen. Hvis den mengde pasta som skal passere ut under en gitt dosering er meget liten, kan vibreringen imidlertid unntagelsesvis sløyfes. I hvert tilfelle bør vibreringen finne sted i det minste i de fleste tilfeller under doseringen. Vibreringen bør her siktsmessig fortsettes frem til begynnelsen av hver dosering. Tiden for å holde ventilen 9 åpen er i de fleste tilfeller meget kort, som f.eks. noen få sekunder, og i de fleste tilfeller fortsettes vibreringen slik at den overlapper også dose-ringsperioden. Normally, the vibration should be started a few minutes before each dosing to make the pasta surface smooth and flat and to prevent the fresh water entering the tub from penetrating into and through the pasta. If the amount of paste to pass out during a given dosage is very small, however, the vibration can exceptionally be omitted. In each case, the vibration should occur at least in most cases during dosing. The vibration should ideally be continued until the beginning of each dosage. The time to keep the valve 9 open is in most cases very short, as e.g. a few seconds, and in most cases the vibration is continued so that it also overlaps the dosing period.
EKSEMPEL EXAMPLE
Et foreløpig- forsøk ble gjort med små mengder for å finne ut de rette proporsjoner mellom vann og kalsiumhydroksyd. Det ble funnet at en hensiktsmessig konsistens hos pastaen ble oppnådd når 600 g vann ble blandet med 750 g kalsiumhydroksyd. Totalvek-ten ble således 1350 g, og da den pastalignende masse ble tilblan-det, hadde den et volum av 1 liter. Dette innebærer at den opprin-nelige vannifylling i et doseringskar må være mindre enn 60% av karets volum, og som en praktisk regel burde den være halvparten av dette volum. Hvis en vannfylling av 50% anvendes, kommer den ferdige pasta således til å ta opp • 50% = 83% av karets volum. A preliminary experiment was carried out with small quantities to find out the right proportions between water and calcium hydroxide. It was found that a suitable consistency of the paste was achieved when 600 g of water was mixed with 750 g of calcium hydroxide. The total weight was thus 1350 g, and when the paste-like mass was mixed, it had a volume of 1 litre. This means that the original water filling in a dosing vessel must be less than 60% of the vessel's volume, and as a practical rule it should be half of this volume. If a water filling of 50% is used, the finished pasta will thus take up • 50% = 83% of the tub's volume.
Volumet av det under forsøket tilgjengelige kar var The volume of the vessel available during the experiment was
3 3
lm og dette ble fylt med 500 1 vann og 625 kg kalsiumhydroksyd. Karet ble satt i vibrasjon og den pastalignende masse ble tildan-net med en glatt horisontal overflate. I det gjenværende tomme rom i karet kunne senere innføres 170 1 friskt vann. Under denne tilførsel av friskt vann ble karet vibrert for å sikre at pastaen forble samlet og ikke ble oppspedd. Karet var nå ferdig for anvendelse og det ble funnet at under den etterfølgende dosering hadde hver utpresset porsjon av pasta samme jevne konsistens, lm and this was filled with 500 l of water and 625 kg of calcium hydroxide. The vessel was vibrated and the paste-like mass was formed with a smooth horizontal surface. In the remaining empty space in the tub, 170 liters of fresh water could later be introduced. During this addition of fresh water, the vessel was vibrated to ensure that the paste stayed together and did not loosen. The vessel was now ready for use and it was found that during the subsequent dosing each extruded portion of paste had the same uniform consistency,
som forble praktisk talt uforandret under de følgende doseringer inntil den i karet lagrede pasta var helt oppbrukt. which remained practically unchanged during the following dosages until the paste stored in the vat was completely used up.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE18038/67A SE331672B (en) | 1967-12-29 | 1967-12-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO124239B true NO124239B (en) | 1972-03-27 |
Family
ID=20304196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO5170/68A NO124239B (en) | 1967-12-29 | 1968-12-23 |
Country Status (13)
Country | Link |
---|---|
AT (1) | AT288982B (en) |
BE (1) | BE726143A (en) |
BR (1) | BR6805142D0 (en) |
CH (1) | CH495915A (en) |
DE (1) | DE1816496A1 (en) |
FI (1) | FI47634C (en) |
FR (1) | FR1598762A (en) |
GB (1) | GB1214560A (en) |
IE (1) | IE32593B1 (en) |
IL (1) | IL31306A (en) |
NL (1) | NL6818718A (en) |
NO (1) | NO124239B (en) |
SE (1) | SE331672B (en) |
-
1967
- 1967-12-29 SE SE18038/67A patent/SE331672B/xx unknown
-
1968
- 1968-12-19 IE IE1541/68A patent/IE32593B1/en unknown
- 1968-12-22 IL IL31306A patent/IL31306A/en unknown
- 1968-12-23 DE DE19681816496 patent/DE1816496A1/en active Pending
- 1968-12-23 AT AT1249668A patent/AT288982B/en active
- 1968-12-23 NO NO5170/68A patent/NO124239B/no unknown
- 1968-12-23 GB GB60969/68A patent/GB1214560A/en not_active Expired
- 1968-12-26 FR FR1598762D patent/FR1598762A/fr not_active Expired
- 1968-12-27 FI FI683714A patent/FI47634C/en active
- 1968-12-27 BE BE726143D patent/BE726143A/xx unknown
- 1968-12-27 BR BR205142/68A patent/BR6805142D0/en unknown
- 1968-12-27 NL NL6818718A patent/NL6818718A/xx unknown
- 1968-12-30 CH CH1936468A patent/CH495915A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
BR6805142D0 (en) | 1973-03-08 |
IE32593B1 (en) | 1973-10-03 |
NL6818718A (en) | 1969-07-01 |
FR1598762A (en) | 1970-07-06 |
FI47634C (en) | 1974-02-11 |
FI47634B (en) | 1973-10-31 |
AT288982B (en) | 1971-03-25 |
GB1214560A (en) | 1970-12-02 |
BE726143A (en) | 1969-05-29 |
IL31306A (en) | 1972-11-28 |
DE1816496A1 (en) | 1969-07-10 |
CH495915A (en) | 1970-09-15 |
IL31306A0 (en) | 1969-02-27 |
IE32593L (en) | 1969-06-29 |
SE331672B (en) | 1971-01-04 |
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