CN86101690A - The method and apparatus of improved pulp treatment factory black liquor - Google Patents
The method and apparatus of improved pulp treatment factory black liquor Download PDFInfo
- Publication number
- CN86101690A CN86101690A CN198686101690A CN86101690A CN86101690A CN 86101690 A CN86101690 A CN 86101690A CN 198686101690 A CN198686101690 A CN 198686101690A CN 86101690 A CN86101690 A CN 86101690A CN 86101690 A CN86101690 A CN 86101690A
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- CN
- China
- Prior art keywords
- storage tank
- hydrolytic decomposition
- decomposition pot
- liquid
- jar
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
- B01J8/10—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles or endless belts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
- C01G49/0027—Mixed oxides or hydroxides containing one alkali metal
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0085—Introduction of auxiliary substances into the regenerating system in order to improve the performance of certain steps of the latter, the presence of these substances being confined to the regeneration cycle
- D21C11/0092—Substances modifying the evaporation, combustion, or thermal decomposition processes of black liquor
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compounds Of Iron (AREA)
Abstract
The sodium ferrite particle is packed into can be in the hydrolytic decomposition pot of the vertical center line of cylindrical tube rotation.This cylinder becomes a plurality of storage tanks by radial separations.The particle that promptly will contain sodium ferrite before hydrolytic decomposition pot is through first storage tank adds, and through promptly discharging particle after the last storage tank.In hydrolytic decomposition pot was introduced water through above the last storage tank time jar, this moment was the liquids recovery of discharging storage tank in the end.When hydrolytic decomposition pot runs to each intermediate storage tank top, liquid sequentially is transferred to each hydrolytic decomposition pot.Liquid finally above hydrolytic decomposition pot runs to first storage tank time from last intermediate storage tank moves into jar, then liquids recovery to first storage tank.
Description
This step of sodium ferrite hydrolysis also can carry out in tilting ascarid band conveyer.In conveyer, the ascarid band is countercurrent direction to particle that contains sodium ferrite and the water that flows downward and upwards carries.Though this method it is found that than fully that the sodium ferrite submergence is good the particle of some sodium ferrites has the tendency of being gone to the back by the water flushing, this control to process has adverse influence.People find that also this method may cause producing a large amount of undesirable sodium ferrite powder simultaneously.
The purpose of this invention is to provide a relatively more consistent hydrolysis rate, also provide good process control simultaneously, and make the amount of powdered product reach bottom line.In the method for the invention, the sodium ferrite particle is gone forward side by side and is cooled from the thermopnore recovery.Right person of outstanding talent is added to particle in one or more hydrolytic decomposition pots, and these hydrolytic decomposition pots are round a vertical center line rotation that is generally the garden pillar buoy, and this garden tube is divided into many storage tanks that receive liquid along radial direction.In the rotation way, hydrolytic decomposition pot begins to feed in raw material through before first storage tank, through behind last storage tank, with the hydrolytic decomposition pot emptying.When each last storage tank of hydrolytic decomposition pot process, in jar, add water.At this moment, the liquid of discharging from each hydrolytic decomposition pot and then be recovered to last storage tank, and when next hydrolytic decomposition pot passes through adjacent intermediate storage tank, liquid in the last storage tank is transferred in this jar, the liquid of discharging from this back hydrolytic decomposition pot is recycled in the above-mentioned adjacent intermediate storage tank equally, and transfers in the intermediate storage tank adjacent with the latter with same approach.At last, when hydrolytic decomposition pot during, liquid imported be equipped with in the hydrolytic decomposition pot of the particle that is untreated, and then the NaOH liquid of enrichment relatively is recovered in first storage tank through first storage tank.Because at the initial stage of hydrolytic process, the concentration ratio that the higher phase then uses that compares of the naoh concentration in the leaching liquid is lower, thereby hydrolysis rate is relatively more consistent in whole process.
Method and apparatus of the present invention is described further according to the following drawings:
Fig. 1 is the general flow chart of the device of the direct absorption method pulp treatment of alkali factory black liquor employing.
Fig. 2 is the perspective view of the optimum implementation of the leaching device that adopts in the process of explaining at Fig. 1 of the present invention.
Referring to Fig. 1, in the embodiment of a direct absorption method of alkali, in evaporimeter, give the black liquor of having handled earlier is delivered to fluid bed 10 through a series of geat with pump reaction zone.At the reaction zone of fluid bed, the organic matter in the black liquor is burnt, and remaining sodium carbonate and iron oxide reaction generate sodium ferrite.
Remove some reaction heat by means of water pipe 12 at reaction zone.Waste heat superheater 14, waste heat boiler 16 and use the economizer 18 of the flue gas equilibrium vapour pressure that raise.The gas that is come by waste heat boiler is removed the dust that produces previously through dust arrester 20, by an air-introduced machine it is entered chimney then.By boiler economizer and dust arrester storage bin(hopper) and the dust that comes is collected into together and delivers to as soon as possible in the bunker (not marking) with compressed air.Comminutor 22 is sent in the dust metering, and the particle of producing is dry in baker 24, directly turns back on the fluid bed multiplexing then.
The sodium ferrite that is come by fluidized bed reaction zone is through fluidized bed cooler 26, and most of sensible heat transfer is used for making reaction bed flow air stream to what produce by drum phoenix machine 28.
The sodium ferrite that cooled off enters leaching (or hydrolysis) stage then through a bunker (not marking).In leacher 30, sodium ferrite is reverse flow with water and contacts, and regenerates sodium hydroxide solution and iron oxide.This point in the back also will more detailed illustrating.
The iron oxide of being regenerated by leaching reduces the water yield that turns back to liquefied bed through adjacent dewatering screen (not indicating) to try one's best.The iron oxide that is come by dewatering screen enters hopper 32, is sent back to the reaction zone of fluid bed then quantitatively by conveyer system.Fine powder and the sodium ferrite mix dust of dehydration also as early as possible granulation re-use to deliver in the cellar for storing things.The NaOH of regeneration is delivered to centrifuge 34, removes the remaining croci of suspension from white liquid.Croci can be transported to hopper 32, also can be sent to comminutor with the granulation of sodium ferrite dust.
Obviously, remove outside the leacher, other parts described above are very usual, will not set forth separately in the present invention.Also might adopt other suitable equipment to finish function described above.
The leacher that is adopted in the inventive method as shown in Figure 2.As can be seen, this leacher comprises a fixing garden pillar buoy, its label normally 36.This tube has a central opening 38, and by many be that 40 warp-wise dividing plate is separated into storage tank 42,44,46,48 and 50 as label.Track 52 be placed in the tube 36 above.Installation label in orbit is 54 rotation jar assembly.This assembly comprises hydrolytic decomposition pot 56,58,60,62 and 64.The top of each hydrolytic decomposition pot all is an opening, contains the particle of sodium ferrite with reception.All there is being one on each hydrolytic decomposition pot as the door 66 that is installed in taking turns on 68.The height of these hydrolytic decomposition pots preferably is equal to, or greater than 1: 1 with wide ratio.Make whole hydrolytic decomposition pot assembly rotation by means of runner (not indicating), and each hydrolytic decomposition pot is counterclockwise rotated round the vertical center line of garden pillar buoy.Because track 52 do not pass storage tank 50, so door is just opened when hydrolytic decomposition pot forwards to here, material wherein just is discharged in the storage tank 50.Because hydrolytic decomposition pot still continues rotation, the wheel on jar is directed again and the jar door is closed the spare time in 52.After this, the particle that contains sodium ferrite is added to the hydrolytic decomposition pot from bunker 70 again.For the purpose of clear and definite, here calling " first storage tank " in hydrolytic decomposition pot emptying and reinforced again that storage tank 48 of at first crossing later, that storage tank 42 of crossing at last before the hydrolytic decomposition pot emptying is called " last storage tank ", be placed in along hydrolytic decomposition pot rotation direction in orbit first and at last the storage tank 44 and 46 between the storage tank call " intermediate storage tank ".Being marked with 72 overhead rotation storage tank is also included within the rotation hydrolytic decomposition pot assembly.This storage tank by many be that 74 radially dividing plate is separated into 76,78 as label, 80,82 and 84 several minutes grooves.Each divides groove all to be connected with a hydrolytic decomposition pot, by being that 85 bottom inlet imports liquid in the hydrolytic decomposition pot as label.Thereby, the liquid of importing from bottom to up by the particle in the jar therefrom to leach sodium.The liquid collecting that will overflow from the hydrolytic decomposition pot top is in 86 the top discharge opeing structure as label at one, and on the stationary magazine creel is in 42 the storage tank through being that 88 pipeline flows to as label as label.
Through pipeline 90 label in the rotation storage tank is that 76 branch groove supplies water, and by pipeline 92 water is transplanted on hydrolytic decomposition pot 56 then.The temperature of water is preferably more than 70 ℃.After from the sodium ferrite of that hydrolytic decomposition pot, leaching sodium, it is discharged in the storage tank 42 with this water.Then the sodium hydrate aqueous solution in the storage tank 42 is delivered to the rotation storage tank through pipeline 94, and then be sent to hydrolytic decomposition pot 58 through pipeline 96.After it flows through hydrolytic decomposition pot 58 from bottom to up, enrichment sodium hydroxide solution drain into storage tank 44, and again it is delivered to the rotation storage tank through pipeline 100 thus.By pipeline 102 solution is further delivered to hydrolytic decomposition pot 60, here the further enrichment of this solution drains into it storage tank 46 then.By pipeline 104 solution is transplanted on the rotation storage tank from storage tank 46, and and then it is delivered to hydrolytic decomposition pot 62 by pipeline 106.After jar 62 further enrichments, this solution is discharged in the storage tank 48 again.Then, by pipeline 108 this solution is shifted out system.Though be noted that pipeline 110 No. 84 branch grooves in the rotation storage tanks 72 and jars 64 are associated in together, do not have liquid to be directed to be installed in No. 84 branch grooves of rotation storage tank of storage tank 50 tops.Storage tank 50 is to be used for receiving the solid that emits from hydrolytic decomposition pot.Thereby, on this position, being flowing in the liquid in the pipeline 110, the words that both made also will be minute quantities.Can see that also ascarid is revolved removal device 112 solid is discharged from storage tank 50.These solids also can be discharged with a discharge chute easily.
Use method and apparatus described above, might reclaim NaOH with a more constant speed, this point is significant.For example, in the time of on a hydrolytic decomposition pot is positioned at storage tank 48, leaching solution has been relatively to have concentrated, and solid does not thitherto also pass through any leaching.Yet in the time of on hydrolytic decomposition pot is positioned at storage tank 42, a large amount of sodium leaches from solid, does not almost have sodium hydroxide solution in leaching liquid.This method and apparatus will allow to control the leaching condition more accurately, and the excessive sodium ferrite powder of unlikely generation, and this point also is significant.
Although described in detail the present invention, be appreciated that the disclosed part of the present invention only is an example.Closing what scope of the present invention is determined by the following claim book.
Claims (12)
1, in the method for a kind of pulp treatment factory black liquor, it is characterized in that following steps are arranged, burning-off organic matter in fluid bed at first, and make remaining sodium carbonate and iron oxide reaction generate the particle that contains sodium ferrite, take out in this then and describedly contain the particle of sodium ferrite and cool off it, and this particle is contacted with water, and improvement wherein is by following step this particle to be contacted with water:
(a), described particle is installed in the hydrolytic decomposition pot that repeats to turn round on continuous closed-loop path, and receive storage tank by first and the final liquid close successively with it along this loop;
(b), when described hydrolytic decomposition pot passes through close last storage tank, in jar, add and contain the water of liquid, and when described dense body is discharged from this hydrolytic decomposition pot, it is recovered in the last storage tank;
(c), when described hydrolytic decomposition pot during,, when this liquid is discharged from described hydrolytic decomposition pot, it is recovered in first storage tank being recovered in described liquid transporting in the last storage tank in this hydrolytic decomposition pot through close first storage tank;
(d), through after the close last storage tank, particle is discharged from this jar, before this hydrolytic decomposition pot passes through the first close storage tank again, in jar, add particle again then at described hydrolytic decomposition pot.
2, in the method for a kind of pulp treatment factory black liquor, following steps have been characterised in that, burning-off organic matter in fluid bed at first, and make remaining sodium carbonate and iron oxide reaction generate the particle of Fe-laden acid sodium, take out in this then and contain the particle of sodium ferrite and cool off it, and this particle is contacted with water, and improvement wherein is by following step described particle to be contacted with water:
(a), described particle is added to one group on public, continuous, closed-loop path in turn and in the hydrolytic decomposition pot of running repeatedly, and receives storage tank through first and the final liquid close successively with it along this loop;
(b), when each described hydrolytic decomposition pot passes through close last storage tank, in jar, add and contain the water of liquid, and when described liquid is discharged from each hydrolytic decomposition pot, it is recovered in the last storage tank;
(c), when each described hydrolytic decomposition pot passes through the first close storage tank, the described liquid that is recovered in the last storage tank is moved on in the jar, and this liquid is recovered to first storage tank from each described hydrolytic decomposition pot;
(d), after each described hydrolytic decomposition pot passes through close last storage tank, particle is discharged the particle of before described hydrolytic decomposition pot passes through the first close storage tank again, in jar, packing into again then from jar.
3, in the cited method of claim 1, intermediate liquid receive storage tank assign into first and last storage tank between for hydrolytic decomposition pot on the loop of operation.In the cited method of claim 1, in step (b), be recovered in the last storage tank liquid what hydrolytic decomposition pot through first storage tank transfer at that time go in the jar before, be incorporated in this jar when earlier described liquid what hydrolytic decomposition pot being passed through this intermediate storage tank, and it is recovered in the described intermediate storage tank; After this, more described liquid what hydrolytic decomposition pot is transferred in this jar during through first storage tank.
4, in the cited method of claim 2, intermediate liquid receive storage tank assign into first and last storage tank between, for hydrolytic decomposition pot on the loop of operation.In the cited method of claim 2, in step (b), be recovered in the last storage tank each hydrolytic decomposition pot of liquid what through first storage tank transfer at that time go in the jar before, be incorporated in the jar during earlier with each this intermediate storage tank of hydrolytic decomposition pot process of described liquid what, and it is recovered in this intermediate storage tank; After this, more described each hydrolytic decomposition pot of liquid what is transferred in the jar during through first storage tank.
5, in the cited method of claim 1, several intermediate liquids receive storage tanks assign into successively first and last storage tank between, for hydrolytic decomposition pot on the loop of operation.In the cited method of claim 1, in step (b), be recovered in the last storage tank liquid what hydrolytic decomposition pot through the first close storage tank transfer at that time go in this jar before, be incorporated in this jar when earlier described liquid what hydrolytic decomposition pot being passed through each close intermediate storage tank, and according to the order opposite with this hydrolytic decomposition pot traffic direction liquids recovery in described storage tank.
6, in the cited method of claim 2, several intermediate liquids receive storage tanks assign into successively first and last storage tank between, for hydrolytic decomposition pot on the loop of operation.In the cited method of claim 2, in step (b), be recovered in the liquid in the last storage tank, before the first close storage tank of each hydrolytic decomposition pot process of what is transferred at that time and is gone in the jar, be incorporated in the described jar during earlier close each intermediate storage tank of described each jar of liquid what process, and according to the order opposite with the hydrolytic decomposition pot traffic direction liquids recovery in described storage tank.
7, in the described method of claim 1, the liquid that imports hydrolytic decomposition pot in step (b) is made up of water basically.
8, in the described method of claim 2, the liquid that imports in the hydrolytic decomposition pot in step (b) is made up of water basically.
9, in the described method of claim 7, import the temperature of the liquid in the hydrolytic decomposition pot in the step (b) greatly about more than 70 ℃.
10, in the described method of claim 8, import the temperature of the liquid in each hydrolytic decomposition pot in the step (b) greatly about more than 70 ℃.
11, the hydrolysis device that contains the sodium ferrite particle comprises:
(a), one has vertical center line and radially is divided into the columniform tube that is generally that comprises first and final liquid reception storage tank at least;
(b), have a hydrolytic decomposition pot that has lower liquid feed arrangement and upper liquid discharger at least, described hydrolytic decomposition pot is installed in described cylinder top and at the center line of lateral run-out cylinder;
(c), make vertical center line rotation that hydrolytic decomposition pot centers on cylinder with cause its successively through first and final liquid receive the device of storage tank;
(d), before described hydrolytic decomposition pot is through first storage tank, add the device that contains the sodium ferrite particle to hydrolytic decomposition pot rapidly;
(e), when the last storage tank of described hydrolytic decomposition pot process, the water that contains liquid is introduced in the jar, from bottom to top flow through this jar, discharge, and be recovered to the device in the last storage tank through liquid discharge device to cause this liquid through its liquid-inlet device;
(f),, make liquid shift out and import the liquid-inlet device, causing liquid to flow through hydrolytic decomposition pot from bottom to up and to discharge, and then be collected in device in first storage tank by liquid discharge device from described last storage tank when hydrolytic decomposition pot during through first storage tank;
(g), at the device of hydrolytic decomposition pot through particle is discharged rapidly from jar;
12, in the described device of claim 11, the cylindrical tube radial separations becomes first and last and assigning an intermediate storage tank and the first storage tank adjacency at least on the hydrolytic decomposition pot rotation direction, in the claim 11, when making liquid during through first storage tank, hydrolytic decomposition pot further is transferred to device the jar from this intermediate storage tank with make when the described intermediate storage tank liquid be transplanted on jar to neutralize when hydrolytic decomposition pot from last storage tank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74480285A | 1985-06-13 | 1985-06-13 | |
| US744,802 | 1985-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86101690A true CN86101690A (en) | 1986-12-10 |
Family
ID=24994044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198686101690A Pending CN86101690A (en) | 1985-06-13 | 1986-03-18 | The method and apparatus of improved pulp treatment factory black liquor |
Country Status (7)
| Country | Link |
|---|---|
| CN (1) | CN86101690A (en) |
| AU (1) | AU577192B2 (en) |
| DK (1) | DK276686A (en) |
| GB (1) | GB2176470B (en) |
| IN (1) | IN163967B (en) |
| NZ (1) | NZ216328A (en) |
| ZA (1) | ZA864187B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU671493B2 (en) * | 1992-09-30 | 1996-08-29 | Amcor Limited | A process for recovering alkali metal hydroxide from organic liquors |
| ZA937252B (en) * | 1992-09-30 | 1994-04-19 | North Broken Hill Ltd | A process for pelletising particles of alkali metal ferrite |
| GB0119237D0 (en) * | 2001-08-07 | 2001-10-03 | Bioregional Minimills Uk Ltd | Paper plant |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU450309B2 (en) * | 1972-11-13 | 1974-07-04 | Oji Paper Co. Ltd. | Method for directly converting sodium carbonate into caustic soda and application of said method to pulp and paper industry |
| JPS5112724B2 (en) * | 1974-02-23 | 1976-04-22 |
-
1986
- 1986-03-18 CN CN198686101690A patent/CN86101690A/en active Pending
- 1986-05-23 AU AU57837/86A patent/AU577192B2/en not_active Ceased
- 1986-05-28 NZ NZ216328A patent/NZ216328A/en unknown
- 1986-06-04 IN IN415/CAL/86A patent/IN163967B/en unknown
- 1986-06-05 ZA ZA864187A patent/ZA864187B/en unknown
- 1986-06-06 GB GB08613767A patent/GB2176470B/en not_active Expired
- 1986-06-12 DK DK276686A patent/DK276686A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| ZA864187B (en) | 1987-02-25 |
| GB2176470A (en) | 1986-12-31 |
| DK276686A (en) | 1986-12-14 |
| AU577192B2 (en) | 1988-09-15 |
| AU5783786A (en) | 1986-12-18 |
| DK276686D0 (en) | 1986-06-12 |
| IN163967B (en) | 1988-12-17 |
| GB8613767D0 (en) | 1986-07-09 |
| NZ216328A (en) | 1988-07-28 |
| GB2176470B (en) | 1988-09-28 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |