NO155231B - DEVICE FOR THE RELEASE OF A WEEKLY ROLL FROM AN INTERMEDIATE PRODUCT. - Google Patents
DEVICE FOR THE RELEASE OF A WEEKLY ROLL FROM AN INTERMEDIATE PRODUCT. Download PDFInfo
- Publication number
- NO155231B NO155231B NO793931A NO793931A NO155231B NO 155231 B NO155231 B NO 155231B NO 793931 A NO793931 A NO 793931A NO 793931 A NO793931 A NO 793931A NO 155231 B NO155231 B NO 155231B
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- NO
- Norway
- Prior art keywords
- stage
- circulation
- stages
- temperature
- cooking
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/006—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only winding-up or winding-off several parallel metal bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D21/00—Machines or devices for shearing or cutting tubes
- B23D21/14—Machines or devices for shearing or cutting tubes cutting inside the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
- B23D31/002—Breaking machines, i.e. pre-cutting and subsequent breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/002—Precutting and tensioning or breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/02—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with longitudinal slitters or perforators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/513—Modifying electric properties
- B65H2301/5133—Removing electrostatic charge
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Replacement Of Web Rolls (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
- Winding Of Webs (AREA)
- Unwinding Webs (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Packaging Of Special Articles (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
INNRETNING FOR FRIGJØRING AV EN VIKLET RULL FRA ET MELLOMPRODUKT.DEVICE FOR RELEASING A WRAPPED ROLL FROM AN INTERMEDIATE PRODUCT.
Description
Fremgangsmåte for fremstilling av kokesyre for cellulosekokning. Process for the production of cooking acid for cellulose cooking.
Nærværende oppfinnelse vedrorer en fremgangsmåte ved fremstilling av kokesyre for cellulosekokning, hvor rokgasser fra en kjele The present invention relates to a method for the production of cooking acid for cellulose cooking, where flue gases from a boiler
som inneholder alkali- og/eller jordalkaliforbindelser samt SC^ som sur "bestanddel, vaskes i en ventur i skrubber ved hjelp av en sirkulasjonsvæske, som inneholder alkali og/eller jordalkalihydroksyder og oppfinnelsen karakteriseres ved at vaskingen skjer i minst to trinn ved forskjellige temperaturer, idet temperaturen synker trinn for trinn og at en del av sirkulasjonsvæsken som delvis tilfores i systemet i motstrom til rokgass-stromningen, tas ut ved forste trinn og eventuellt forst which contains alkali and/or alkaline earth compounds as well as SC^ as an acidic component, is washed in a venturi in scrubbers with the help of a circulating liquid, which contains alkali and/or alkaline earth hydroxides and the invention is characterized by the fact that the washing takes place in at least two stages at different temperatures, as the temperature drops step by step and that a part of the circulation liquid which is partly fed into the system in countercurrent to the flue gas flow, is taken out at the first step and possibly first
fores i en sedimenteringstank og derfra til syrebeholderen, hvor den endelige pH-justeringen finner sted. is fed into a sedimentation tank and from there to the acid tank, where the final pH adjustment takes place.
Med fordel anvendes Na som alkali og Mg eller Ca som jordalkali, men også andre alkali og jordalkali kan komme på tale. Advantageously, Na is used as alkali and Mg or Ca as alkaline earth, but other alkalis and alkaline earths can also be used.
Temperaturen i sirkulasjonsvæsken i det forste trinn er 65~75°C og i annet trinn hO- 50°C og i tilfelle av at flere trinn anvendes, synker temperaturen ytterligere i hvert etterfSigende trinn. The temperature in the circulation fluid in the first stage is 65~75°C and in the second stage h0-50°C and in the case that several stages are used, the temperature drops further in each subsequent stage.
Oppfinnelsen beskrives nærmere i det folgende under henvisning til den vedlagte skjematiske tegning, som viser fremgangsmåten ifolge oppfinnelsen tilpasset en tretrinnsventuriskrubber. The invention is described in more detail below with reference to the attached schematic drawing, which shows the method according to the invention adapted to a three-stage venturi scrubber.
Systemet består av trinn 1, 2 og 3 ■, som består av i serie koplede venturiskrubbere, samt en skorstein ^f, som har en ikke vist innebygget dråpefraskiller. Rokgasser innfores i systemet gjennom et innlop 25. Rokgassene kommer fra en ikke vist sulfitlutkjele som fyres med lut som inneholder opploselige alkalier eller jordalkalier, i dette som eksempel viste tilfellet med magnesium som base og SC^ som hovedsaklig sur bestanddel. The system consists of stages 1, 2 and 3 ■, which consist of venturi scrubbers connected in series, as well as a chimney ^f, which has a built-in drop separator, not shown. Coal gases are introduced into the system through an inlet 25. The coke gases come from an unshown sulphite caustic boiler which is fired with lye containing soluble alkalis or alkaline earths, in this example shown the case with magnesium as base and SC^ as mainly acidic component.
Rokgassene sammen med en del av rokgass-stovet, som hovedsaklig består av MgO og SC^, kjoles i trinn 1 som består av en venturiskrubber, til en temperatur på 65-75°C ved hjelp av sirkulasjonsvæske. Sirkulasjonsvæsken fores gjennom en varmeveksler 7 hvor den kjoles indirekte med kjolevann, som fores inn i systemet gjennom en innlijpsledning 15, 'og går enten direkte til varmeveksleren 7 eller forst til en varmeveksler 8, hvor sirkulasjonsvæsken, med hvilken rokgassene i trinnet 2 avkjoles til en temperatur på <1>+0-50°C, kjoles, og derfra til varmeveksleren 7. Her skjer det således en avkjolning av rokgasser i to trinn, hvor absorpsjonen skjer ved to ulike temperaturer. I det forste trinnet 1, hvor temperaturen er hoyest, d.v.s. 65-75°C, oppnår man en storre reaksjonshastighet mellom sirkulasjonsvæsken og SC^-gassene, -og i det annet trinn 35 er temperaturen, lavere, d.v.s. <l>fO-50°C, for å forskyve likevekten tilstrekkelig i retning The flue gases together with part of the flue gas stove, which mainly consists of MgO and SC^, are cooled in stage 1, which consists of a venturi scrubber, to a temperature of 65-75°C by means of circulation liquid. The circulation fluid is fed through a heat exchanger 7, where it is indirectly cooled with coolant water, which is fed into the system through an inlet line 15, and goes either directly to the heat exchanger 7 or first to a heat exchanger 8, where the circulation fluid, with which the flue gases in stage 2 are cooled to a temperature of <1>+0-50°C, is cooled, and from there to the heat exchanger 7. Here, combustion gases are thus cooled in two stages, where absorption takes place at two different temperatures. In the first step 1, where the temperature is highest, i.e. 65-75°C, a greater reaction rate is achieved between the circulation fluid and the SC^ gases, -and in the second stage 35 the temperature is lower, i.e. <l>fO-50°C, to shift the equilibrium sufficiently in the direction
mot bisulfitdannelse. against bisulphite formation.
Sirkulasjonsvæsken utgjores av magnesiumhydroksydoppslemning, som tilberedes i leskningstanken 6, i hvilken det i dette tilfellet innfores MgO, som bringes til å reagere med vann til magnesiumhydroksyd ved hjelp av dampoppvarmning. Den oppstående magnesiumhydroksydoppslemningen settes i sirkulasjon langs en sirkulasjonsledning 17 ved hjelp av en pumpe 1^-. Fra denne sirkulasjonsledning 17 tas stikkledninger 18, 19, 20 til sirku-las jonsledningen i hvert av trinnene 3> 2 og 1. Oppslemningen fores gjennom stikkledningen 18 til sirkulasjonsledningen i trinn 3 og gjennom sirkulasjonspumpen 13. Fra dette trinnet 3? som reguleres ved pH-kontroll slik at pH holdes ved ca. ^,5? tas en del av væsken via ledning og ventil 21 til sirkulasjonssystemet for trinn 2 via en pumpe 12, varmeveksleren 8 og en sirkulasjonspumpe 11 samt gjennom skrubberen 2. Fra dette trinnet 2 tas en del av sirkulasjonsvæsken via en ledning 22 med ventil til en pumpe 10 og via varmeveksleren 7 til en sirkulasjonspumpe 9 og gjennom skrubberen 1. Fra denne sirkulasjonskrets for trinnet 1 tas en del ut som nesten ferdig kokesyre via en med ventilfor-synt ledning 23, altså foran varmeveksleren 7, til en sedimenteringstank 5? hvor uopploste stoffer skilles fra og fores til-bake til systemet, og derfra videre til en ikke vist syrebe-holder via en ledning 26. Den endelige pH-justeringen finner sted i syrebeholderen. The circulating fluid is made up of magnesium hydroxide slurry, which is prepared in the leaching tank 6, into which in this case MgO is introduced, which is caused to react with water to form magnesium hydroxide by means of steam heating. The resulting magnesium hydroxide slurry is circulated along a circulation line 17 by means of a pump 1^-. From this circulation line 17, branch lines 18, 19, 20 are taken to the circulation line in each of stages 3, 2 and 1. The slurry is fed through the branch line 18 to the circulation line in stage 3 and through the circulation pump 13. From this stage 3? which is regulated by pH control so that the pH is kept at approx. ^.5? part of the liquid is taken via line and valve 21 to the circulation system for stage 2 via a pump 12, the heat exchanger 8 and a circulation pump 11 as well as through the scrubber 2. From this stage 2 part of the circulation liquid is taken via a line 22 with valve to a pump 10 and via the heat exchanger 7 to a circulation pump 9 and through the scrubber 1. From this circulation circuit for step 1, a portion is taken out as almost finished cooking acid via a valve-equipped line 23, i.e. in front of the heat exchanger 7, to a sedimentation tank 5? where undissolved substances are separated and fed back to the system, and from there on to an acid container not shown via a line 26. The final pH adjustment takes place in the acid container.
Til de forskjellige trinn tilfores magnesiumhydroksyd-oppslemning gjennom ledninger 18, 19 og 20 og mengden av friskt magnesiumhydroksyd bor reguleres i overensstemmelse med S02~mengden i rokgassene slik at tilførselen av MgO til trinn 1 tilsvarer S02-mengden i rokgassene ved trinn 1. Tilførselen til trinn 2 er såpass mye mindre at den tilsvarer den mengde S02 som er til-bake i rokgassene ved trinn 2 etter absorpsjonen i trinn 1 og analogt tilforselen til trinn 3 tilsvarende den tilbakeblivende mengden S02 i rokgassene etter absorpsjonen i trinn 2. Mengde-reguleringen av tilfort friskt magnesiumhydroksyd til de forskjellige trinn bor i prinsippet skje i samsvar med absorpsjonseffekten i tilsvarende trinn. Som eksempel kan nevnes at absorpsjonseffekten i trinn 1 i en anordning lik tegningen er ca. 75%, det gjenstår fblgelig 25% av S02 til trinn 2 og etter- Magnesium hydroxide slurry is supplied to the various stages through lines 18, 19 and 20 and the quantity of fresh magnesium hydroxide is regulated in accordance with the S02 quantity in the flue gases so that the supply of MgO to stage 1 corresponds to the S02 quantity in the flue gases at stage 1. stage 2 is so much smaller that it corresponds to the amount of S02 that remains in the flue gases at stage 2 after the absorption in stage 1 and, analogously, the supply to stage 3 corresponds to the remaining amount of S02 in the flue gases after the absorption in stage 2. The quantity regulation of add fresh magnesium hydroxide until the different steps should in principle take place in accordance with the absorption effect in the corresponding step. As an example, it can be mentioned that the absorption effect in step 1 in a device similar to the drawing is approx. 75%, there is probably 25% of S02 remaining for step 2 and after
som absorpsjonseffekten i trinn 2 er ca. like stor, altså ca. as the absorption effect in step 2 is approx. same size, i.e. approx.
75%, blir det igjen ca. 6- 7% å absorbere ved trinn 3. Man får således en tilforsel av friskt magnesiumhydroksyd til de for- 75%, there will be approx. 6-7% to absorb in step 3. You thus get a supply of fresh magnesium hydroxide for the
skjellige trinnene 1,2 og 3 som forholder seg slik 100:25:7. Dette forhold varierer avhengig av mengden vedkommende skrubber- different steps 1,2 and 3 which relate like this 100:25:7. This ratio varies depending on the amount of scrubber in question
trinn absorberer av S02. Årsaken til at man bor holde denne mengde slik er at et overskudd av magnesiumhydroksyd forer til dannelse av monosulfit, som er meget tungt opploselig og faller ut, og kommer til å vise seg som et tap som må erstattes i systemet. Hvis man på den andre siden tilforer for lite magnesiumhydroksyd skjer reaksjonen ufullstendig og man får en dårlig utvinning av S02<step absorber of S02. The reason why this quantity should be kept this way is that an excess of magnesium hydroxide leads to the formation of monosulphite, which is very difficult to dissolve and precipitates, and will appear as a loss that must be replaced in the system. If, on the other hand, you add too little magnesium hydroxide, the reaction is incomplete and you get a poor recovery of S02<
Kjolevannet for varmevekslerne 7 og 8 innfores gjennom en led- The dressing water for the heat exchangers 7 and 8 is introduced through a
ning 15 forst til varmeveksleren 8 og derfra siden til varme- ning 15 first to the heat exchanger 8 and from there to the heat
veksleren 7' Gjennom stikkledning 16 forsynt med en ventil kan kjolevannet også tilfores til trinn 3'the exchanger 7' Through a plug line 16 equipped with a valve, the dressing water can also be supplied to stage 3'
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/966,432 US4176774A (en) | 1978-12-04 | 1978-12-04 | Coil breakaway device |
| US05/972,552 US4191318A (en) | 1978-12-22 | 1978-12-22 | Breakaway uncoiler |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO793931L NO793931L (en) | 1980-06-05 |
| NO155231B true NO155231B (en) | 1986-11-24 |
| NO155231C NO155231C (en) | 1987-03-04 |
Family
ID=27130486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO793931A NO155231C (en) | 1978-12-04 | 1979-12-03 | DEVICE FOR THE RELEASE OF A WEEKLY ROLL FROM AN INTERMEDIATE PRODUCT. |
Country Status (22)
| Country | Link |
|---|---|
| AR (1) | AR220016A1 (en) |
| AT (1) | AT374381B (en) |
| AU (1) | AU532101B2 (en) |
| BR (1) | BR7907635A (en) |
| CA (1) | CA1095478A (en) |
| DD (1) | DD147507A5 (en) |
| DE (1) | DE2948753A1 (en) |
| DK (1) | DK513679A (en) |
| ES (1) | ES486144A1 (en) |
| FI (1) | FI67503C (en) |
| FR (1) | FR2443410B1 (en) |
| GB (1) | GB2037644B (en) |
| HU (1) | HU180063B (en) |
| IT (1) | IT1119404B (en) |
| LU (1) | LU81949A1 (en) |
| NL (1) | NL7908723A (en) |
| NO (1) | NO155231C (en) |
| PL (1) | PL128550B1 (en) |
| PT (1) | PT70440A (en) |
| RO (1) | RO81483B (en) |
| SE (1) | SE437011B (en) |
| SU (1) | SU1153814A3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3601637C1 (en) * | 1986-01-21 | 1987-04-30 | Jagenberg Ag | Draw-out device for winding tubes used in reel winding machines |
| FI108853B (en) * | 1997-12-10 | 2002-04-15 | Metso Paper Inc | Method and apparatus for automatically controlling separation of a group of rollers at a roll cutting machine |
| ES2177374B1 (en) * | 1999-12-21 | 2004-08-16 | Indra Sistemas,S.A. | UTIL COIL SEPARATOR. |
| DE10046164B4 (en) * | 2000-09-19 | 2004-07-22 | Koenig & Bauer Ag | mandrel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2742965A (en) * | 1953-02-20 | 1956-04-24 | Western Electric Co | Apparatus for breaking apart segments of a slit paper roll |
| US2998134A (en) * | 1959-01-26 | 1961-08-29 | Gray Stamping And Mfg Company | Method and apparatus for manufacturing gummed-tape rolls |
-
1978
- 1978-12-04 HU HU78RO1049A patent/HU180063B/en unknown
-
1979
- 1979-10-26 IT IT69095/79A patent/IT1119404B/en active
- 1979-11-12 PT PT70440A patent/PT70440A/en unknown
- 1979-11-16 AR AR278939A patent/AR220016A1/en active
- 1979-11-20 ES ES486144A patent/ES486144A1/en not_active Expired
- 1979-11-26 BR BR7907635A patent/BR7907635A/en unknown
- 1979-11-30 DD DD79217281A patent/DD147507A5/en unknown
- 1979-11-30 SE SE7909913A patent/SE437011B/en not_active IP Right Cessation
- 1979-11-30 AU AU53350/79A patent/AU532101B2/en not_active Ceased
- 1979-12-03 DK DK513679A patent/DK513679A/en not_active Application Discontinuation
- 1979-12-03 FI FI793775A patent/FI67503C/en not_active IP Right Cessation
- 1979-12-03 NO NO793931A patent/NO155231C/en unknown
- 1979-12-03 GB GB7941612A patent/GB2037644B/en not_active Expired
- 1979-12-03 RO RO99427A patent/RO81483B/en unknown
- 1979-12-03 CA CA341,083A patent/CA1095478A/en not_active Expired
- 1979-12-03 NL NL7908723A patent/NL7908723A/en not_active Application Discontinuation
- 1979-12-03 LU LU81949A patent/LU81949A1/en unknown
- 1979-12-03 AT AT0765179A patent/AT374381B/en not_active IP Right Cessation
- 1979-12-04 PL PL1979220120A patent/PL128550B1/en unknown
- 1979-12-04 FR FR7929797A patent/FR2443410B1/en not_active Expired
- 1979-12-04 SU SU792850261A patent/SU1153814A3/en active
- 1979-12-04 DE DE19792948753 patent/DE2948753A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AR220016A1 (en) | 1980-09-30 |
| SU1153814A3 (en) | 1985-04-30 |
| AT374381B (en) | 1984-04-10 |
| RO81483B (en) | 1983-04-30 |
| FI67503C (en) | 1985-04-10 |
| DE2948753A1 (en) | 1980-06-19 |
| FR2443410A1 (en) | 1980-07-04 |
| ATA765179A (en) | 1983-09-15 |
| FI793775A7 (en) | 1980-06-05 |
| PT70440A (en) | 1979-12-01 |
| HU180063B (en) | 1983-01-28 |
| DD147507A5 (en) | 1981-04-08 |
| AU532101B2 (en) | 1983-09-15 |
| IT1119404B (en) | 1986-03-10 |
| GB2037644B (en) | 1982-07-14 |
| NO793931L (en) | 1980-06-05 |
| AU5335079A (en) | 1980-06-12 |
| LU81949A1 (en) | 1981-02-03 |
| DK513679A (en) | 1980-06-05 |
| SE7909913L (en) | 1980-06-05 |
| BR7907635A (en) | 1980-08-05 |
| IT7969095A0 (en) | 1979-10-26 |
| FR2443410B1 (en) | 1985-06-28 |
| SE437011B (en) | 1985-02-04 |
| FI67503B (en) | 1984-12-31 |
| CA1095478A (en) | 1981-02-10 |
| NO155231C (en) | 1987-03-04 |
| PL128550B1 (en) | 1984-02-29 |
| NL7908723A (en) | 1980-06-06 |
| GB2037644A (en) | 1980-07-16 |
| ES486144A1 (en) | 1980-05-16 |
| PL220120A1 (en) | 1980-09-08 |
| RO81483A (en) | 1983-04-29 |
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