CN1035959C - Process for partial combustion of cellulose spent - Google Patents
Process for partial combustion of cellulose spent Download PDFInfo
- Publication number
- CN1035959C CN1035959C CN91103739A CN91103739A CN1035959C CN 1035959 C CN1035959 C CN 1035959C CN 91103739 A CN91103739 A CN 91103739A CN 91103739 A CN91103739 A CN 91103739A CN 1035959 C CN1035959 C CN 1035959C
- Authority
- CN
- China
- Prior art keywords
- oxygen
- containing gas
- cellulose spent
- spray gun
- burner
- 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 - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
-
- 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
- D21C11/12—Combustion of pulp liquors
- D21C11/125—Decomposition of the pulp liquors in reducing atmosphere or in the absence of oxidants, i.e. gasification or pyrolysis
Abstract
The present invention relates to a process for partial combustion of cellulose spent liquors using a burner connected to a reactor while adding an oxygen containing gas, maintaining a temperature of more than 700 DEG C within the reactor and that at least half of the non-fuel related amount of oxygen which shall be added to the reactor to partially combust the cellulose spent liquor added through the burner, is added to the reactor as a hot oxygen containing gas added through a channel arranged coaxially around a liquor lance provided for the addition of said cellulose spent liquor, whereby the weight ratio between the oxygen of the oxygen containing gas and the cellulose spent liquor solids is in the range of 0.1-0.7:1.
Description
The present invention relates to use the method for the cellulose spent of the burner partial combustion cellulose industry that links to each other with reactor, this burner comprises the burning rifle or the liquid spray gun of arranged in co-axial alignment, the front end of spray gun is equipped with the nozzle of feed fluid, the outer together passage of axle arrangement that is with at liquid spray gun, passage is as the required oxygen-containing gas of supply unit divided combustion, and oxygen-containing gas was done eddy motion before entering the passage of arranged in co-axial alignment.
The objective of the invention is under the situation of low air/fuel ratio, to produce partial combustion stable, that burner that light flame certainly promotes cellulose spent by using.
The composition of the waste liquid that cellulose industry produces depends on the artistic wood that goes that is adopted.With regard to sulfate pulping industry, the waste liquid that is produced is referred to as black liquor usually, the energy that it contains valuable chemical substance and exists with the form of combustible carbon compound, at present, these chemical substances and energy reclaim in recovery boiler usually, and black liquor is by completing combustion in boiler.
According to the present invention, black liquor is partial combustion in gasification reactor, produces to contain H
2, CO, CO
2Fuel gas and the molten melt drop of inorganic chemical.
During association with pulp bleaching, obtain a kind of weak solution that contains organic material and sodium salt, pulping process mechanical and half chemistry also produces forms different weak solution, and the waste liquid of all these waste liquids and cellulose industry generation in the methods of the invention can be used as raw material and uses through after concentrating.
Though the present invention who introduces below is applicable to the processing of black liquor, its range of application not only is confined to this particular fluid of black liquor.
The mechanism of partial combustion of black liquor is readily appreciated that, these mechanism are specially adapted to the bottom of alkali recovery boiler, yet, the difference of the liquid burner in burner among the present invention and the alkali recovery boiler is in the recovery boiler burner, and atomization of liquid degree is low and do not have a liquid flame of sharp outline.
Burner among the present invention is to use the air or oxygen carrier of relatively low-levels to form stable flame with a main distinction of the oil burner of classics.
In the following example, the black liquor that acts as a fuel has the feature of the water and the ash of low relatively calorific value and high-load:
The calorific value 13GJ/ton dry (DS) of dry
Element is formed C
29H
34O
20Na
9S
2
Do solids content 65%
Viscosity (under 100 ℃) 100CSt
Be present in the fuel that sodium compound in the black liquor and intrinsic elevated oxygen level thereof make it to become a kind of very easy reaction, if use suitable burner in other words, the carbon of flame zone transforms just very high, although this burning is substoichiometric.
The vortex burner of introduction of the present invention is made fuel with black liquor in the reactor of smaller size smaller, its efficiency of combustion height, flame holding are good.Temperature in the reactor is higher than 700 ℃, preferred about 900 ℃.Fusion inorganic chemical (mainly being sodium carbonate and vulcanized sodium) with chilling dissolvers that reactor links to each other in separate with process gas.Process gas mainly is made up of carbon monoxide, carbon dioxide and hydrogen.The volume ratio of carbon monoxide and carbon dioxide can change between 0.8: 1 and is controlled in the process gas, was particularly controlled by oxygen-supplying amount.
The eddy current amount greatly affects the pattern of flow near burner, and eddy current can be controlled by for example regulating swirl vane.Therefore, the influence of the axial flow kept significantly of the radially flow velocity of oxygen-containing gas.The basic principle of vortex burner is with portion gas recirculation after interior recirculation district feed fluid spray gun.The effect in interior recirculation district is to promote burning, the retention flame and increase the ignition energy of atomization of liquid thing for the recirculation of hot gas body.The interior recirculation district is also as hot reactant gas component supply station.
The mixing of atomization of liquid thing and combustion air is provided by turbulent shear face (between race way and gas and drop release place).
Yet, also to have developed the more unessential outer loop of the stability of flame district, its shape is subjected to the influence of reactor geometries bigger than the influence that is subjected to the burner geometry.
For obtaining stable black liquor flame, the expansion and the high efficiency of carbon con version of flame, the fogging degree of liquid is extremely important.The rheological property of black liquor is significant to fogging degree, and this atomizing can realize by a given nozzle.The viscosity of black liquor can change by the method such as heating and/or adding additive, and in the present invention, black liquor is heated to 100 ℃ usually.The viscosity of black liquor is preferably lower than 200CSt during atomizing.
Fogging degree can be further improved by the method for flashed liquid to reactor, and in this case, under the operating pressure of reaction gas, liquid is preheated to the above temperature of boiling point.
More existing dissimilar atomizers, but in the present invention have only wherein a few to be suitable for the atomizing of cellulose spent (as black liquor).
Burner among the most suitable the present invention of " two-fluid " nozzle, a common feature of " two-fluid " nozzle be need be higher relatively airflow rate to provide atomizing required energy.Another important feature of these nozzles is the increase along with atomization gas density, and the size of gained drop reduces.According to the difference of two fluid phase hybrid modes, can predict the mechanism of several formation drops, as the shearing between two bands, the combination of spherical droplets and formation, and the high turbulent flow decomposition of liquid spray etc.
The present invention has introduced the method that burner that a kind of use links to each other with reactor carries out the efficient substoichiometric burning of cellulose spent, the invention is characterized in that half on-fuel oxygen (will be added into and be used for the black liquor that partial combustion adds through burner in the reactor) is with the form adding reactor of hot oxygen-containing gas at least, this gas adds through being arranged in a liquid spray gun coaxial channel (being used to supply with described cellulose spent) on every side, the scope of the weight ratio of the solid in the oxygen of oxygen-containing gas (adding through burner) and the cellulose spent of adding is 0.1-0.7: 1, and preferred 0.15-0.5: 1.
Accompanying drawing is represented " two-fluid " nozzle that a kind of vortex burner is different with two kinds,
Fig. 1 represents a vortex burner and recirculation zone thereof;
Fig. 2 represents the axial cross-sectional view of the embodiment of " two-fluid " nozzle;
Fig. 3 is the front view of the nozzle of Fig. 2 of looking along the III-III hatching of Fig. 2;
Fig. 4 is the axial cross-sectional view of second embodiment of " two-fluid " nozzle;
Fig. 5 is the front view of the nozzle of Fig. 4 of looking along the V-V hatching of Fig. 4.
Fig. 1 represents to place the vortex burner 1 in the combustion chamber 22 and places the interior vortex generator 24 of passage 23 (being used for air supply).Among Fig. 1, solid line is represented the space branch of interior recirculation, chain-dotted line (---) expression interior recirculation district, and dotted line represents to return mobile regional boundary, promptly along this regional boundary recirculation return (axially curve of zero velocity).The chain-dotted line of Fig. 1 bottom also shows the external recirculation regional boundary.Vortex generator 24 places the back of liquid spray gun bottom basically, the combustion air that this means the supply nozzle outside run into and carry the black liquor of atomizing before will circulation around liquid spray gun.Produced the flame of the uniqueness with vortex ring by the vortex generator of arranging, this stability and partially combusted process for flame is very favourable.
Fig. 2 and Fig. 3 represent two-fluid spray nozzle, and liquids and gases mix herein, and high pressure forces its circular open 3 by several symmetric arrays then.These openings are positioned at the end that is referred to as Y-jet atomization nozzle, and nozzle comprises two pipelines 4 and 5, and pipe 4 links to each other with outer tube 6, and as supplying with black liquor, pipe 5 links to each other with interior coaxial sleeve 7, is used as the supply atomization gas.From the bottom 2 of liquid spray gun 1, opening 3 produces disperses the dispersed jet body, and the hood 9 that is installed on the shell 10 of liquid spray gun makes Y blast atomizer 8 in place.Shell 10 encases coaxial sleeve 6 and 7, and black liquor adds feed liquor spray gun body 1 from inlet tube 20, and air adds from another inlet tube 21.
Fig. 4,5 is the embodiment with burner gun of three coaxial sleeves 11,12 and 13, and air adds by outer tube 11 and interior pipe 13, and black liquor is added by intervalve 12.As shown in the figure, air is by 18 equally distributed apertures 14 and opened in 15 minutes, and black liquor is added by annular gap Final 16 row, and hole 14 tilts to a direction, and hole 15 tilts in the opposite direction.Black liquor adds by gap 16, the end plates 17 that run into make it to be forced to inside motion, after running into the air that is entered by hole 16, the black liquor that exist with form of film this moment atomizes, after the additive air of the air at this initial stage-black liquor mixture and end plates 17 outsides meets, form the black liquor divergent fluid of fine dispersion, black liquor is added in the burner by inlet tube 20, and air then adds by two inlet tubes 21.
Though what use in above-mentioned explanation of the present invention is air one speech, the present invention only limits to air, and other gases such as steam, nitrogen or oxygen-enriched air can be used as atomization gas.
Notice very big when the designed combustion device must be placed on the weight ratio of oxidant and fuel.
Here said black liquor is the ordinary fuel of a kind of different in kind, thereby provides the design of the burner of the retention flame also must adapt with it.
Different fuel contains the chemical bond oxygen of different amounts, bituminous coal contain usually 4～10% in conjunction with oxygen, fuel oil contain less than 1% in conjunction with oxygen.
Calculate according to dry, dried solid in the black liquor contain about 35% (weight) in conjunction with oxygen, this situation is influential to the design as the burner of black-liquor combustion, because in order to obtain gratifying burning level, the amount that joins oxygen, air or oxygen-enriched air in the reactor is quite few.
The air/fuel ratio (weight) of the stoichiometric(al) combustion of some materials is exemplified below:
Antracite air/fuel 10-12: 1
Ethanol air/fuel 9: 1
Black liquor air/fuel 4-5: 1
Diesel oil/heavy oil air/fuel 13-15: 1
The solid ratio of air/fuel that is used for the partially combusted burner of the present invention of black liquor is designed to about 0.5-3: 1, and the air/fuel ratio that this value is adopted well below the stoichiometry and the substoichiometric burning of other fuel of great majority.Because air contains the oxygen of about 23% (weight), thereby black-liquor combustion device of the present invention is designed to be applicable to that the solid ratio in oxygen/black liquor is 0.1-0.7: 1.For the low air/fuel of compensate for slower than and obtain rational gas flow rate, air should be preheated at least 100 ℃, preferred 300 ℃, and further do eddy motion.Preheating of air makes the energy of its energy near air in the burner, and this has further supported the stability of flame.The required oxygen major part of partial combustion is supplied with through being arranged in liquid spray gun coaxial channel on every side, and this passage is dispersed the plate place at the burner of reactor and stopped.The required part oxygen of partial combustion can be supplied with flame zone through atomizer, and other parts can be supplied with through second valve on reactor top.
Claims (12)
1. the partially combusted method of a cellulose spent, this method is used the burner that links to each other with reactor, when supplying with oxygen-containing gas, carry out partial combustion, it is characterized in that keeping in the reactor temperature greater than 700 ℃ and at least half on-fuel oxygen with the form that is preheated to the oxygen-containing gas more than 100 ℃ through being arranged in the coaxial channel supply response device around the liquid spray gun, this on-fuel oxygen is by the partial combustion of burner supply response device as cellulose spent, liquid spray gun is used to supply with described cellulose spent, and the oxygen in the added oxygen-containing gas of burner and the weight ratio scope of the solid in the cellulose spent are 0.1-0.7: 1.
2. by the method for claim 1, the weight ratio of the solid in the oxygen in the oxygen-containing gas that it is characterized in that supplying with and the cellulose spent of supply is 0.15-0.5: 1.
3. by the method for claim 1, it is characterized in that doing eddy motion through the oxygen-containing gas that coaxial channel is supplied with.
4. by the method for claim 1, it is characterized in that being compelled to pass through swirl vane through the oxygen-containing gas that coaxial channel is supplied with.
5. press the method for claim 1, it is characterized in that the liquid stream in the liquid spray gun contacts with high-speed gas, the pressure of gas is higher than described cellulose spent, and the speed that this has increased liquid stream makes to form very finely divided spray from the cellulose spent of described liquid spray gun bottom ejection.
6. by the method for claim 1, the cellulose spent that it is characterized in that discharging from the bottom of described liquid spray gun is by the hole of at least three symmetric arrays or through an annular gap.
7. by the method for claim 1, it is characterized in that oxygen-containing gas by the bifurcated nozzle of arranged in co-axial alignment around liquid spray gun, nozzle stops at the reaction zone of described reactor.
8. by the method for claim 1, it is characterized in that swirl vane mainly is arranged in the atomizer back of liquid spray gun.
9. by the method for claim 1, it is characterized in that oxygen-containing gas is preheated to more than 300 ℃.
10. by the method for claim 1, it is characterized in that oxygen-containing gas comprises air or oxygen-enriched air.
11., it is characterized in that the viscosity of cellulose spent before atomizing is reduced to less than 200cSt by the method for claim 1.
12. the method by claim 1 is characterized in that under reactor pressure, the temperature of the cellulose spent of supply response device is higher than its boiling point.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9001958 | 1990-05-31 | ||
| SE9001958A SE466268B (en) | 1990-05-31 | 1990-05-31 | PROCEDURES FOR PARTIAL COMBUSTION OF BLACK FLOAT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057500A CN1057500A (en) | 1992-01-01 |
| CN1035959C true CN1035959C (en) | 1997-09-24 |
Family
ID=20379646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91103739A Expired - Fee Related CN1035959C (en) | 1990-05-31 | 1991-05-31 | Process for partial combustion of cellulose spent |
Country Status (17)
| Country | Link |
|---|---|
| EP (1) | EP0459963B1 (en) |
| JP (1) | JP3050950B2 (en) |
| KR (1) | KR910020369A (en) |
| CN (1) | CN1035959C (en) |
| AT (1) | ATE127180T1 (en) |
| AU (1) | AU643522B2 (en) |
| BR (1) | BR9102205A (en) |
| CA (1) | CA2043605C (en) |
| DE (1) | DE69112496T2 (en) |
| ES (1) | ES2078500T3 (en) |
| FI (1) | FI101724B1 (en) |
| NO (1) | NO176365C (en) |
| NZ (1) | NZ238221A (en) |
| PT (1) | PT97792B (en) |
| RU (1) | RU2032126C1 (en) |
| SE (1) | SE466268B (en) |
| ZA (1) | ZA913732B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE501334C2 (en) * | 1991-11-04 | 1995-01-16 | Kvaerner Pulping Tech | Methods of thermally decomposing a carbonaceous feedstock during sub-stoichiometric oxygen supply and apparatus for carrying out the method |
| SE470515B (en) * | 1992-11-02 | 1994-06-27 | Chemrec Ab | Process for producing hydrogen peroxide |
| US5628872A (en) * | 1993-10-22 | 1997-05-13 | Kanyr Ab | Method for bleaching pulp with hydrogen peroxide recovered from cellulosic spent liquor |
| FI107058B (en) * | 1996-10-07 | 2001-05-31 | Kvaerner Pulping Oy | Method for burning of waste liquor containing silicate |
| GB2450250B (en) | 2006-05-26 | 2009-08-12 | Alexsandra Byrne | Eyelash adornment |
| FI126455B (en) * | 2015-04-14 | 2016-12-15 | Fortum Oyj | Soda boiler, fuel feed means and process for feeding black liquor and air to reduce nitric oxide emissions |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE137938C1 (en) * | ||||
| US3163495A (en) * | 1962-05-02 | 1964-12-29 | Greenawalt John Eckert | In the recovery of chemicals from the incineration of waste black liquor, the method f eliminating noxious compounds entrained in the combustion gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE453102B (en) * | 1985-01-22 | 1988-01-11 | Stiftelsen Cellulosa Och Pappe | KEEP ON BURNING OF MASS PREPARATION ACCORDING TO COOKING PROCESSES ON SODIUM BASE ERHALLEN INDUNSTAD END |
-
1990
- 1990-05-31 SE SE9001958A patent/SE466268B/en not_active Application Discontinuation
-
1991
- 1991-05-16 ES ES91850130T patent/ES2078500T3/en not_active Expired - Lifetime
- 1991-05-16 ZA ZA913732A patent/ZA913732B/en unknown
- 1991-05-16 AT AT91850130T patent/ATE127180T1/en active
- 1991-05-16 DE DE69112496T patent/DE69112496T2/en not_active Expired - Fee Related
- 1991-05-16 EP EP91850130A patent/EP0459963B1/en not_active Expired - Lifetime
- 1991-05-17 KR KR1019910008054A patent/KR910020369A/en not_active Application Discontinuation
- 1991-05-22 NO NO911969A patent/NO176365C/en unknown
- 1991-05-22 NZ NZ238221A patent/NZ238221A/en unknown
- 1991-05-22 AU AU77184/91A patent/AU643522B2/en not_active Ceased
- 1991-05-29 PT PT97792A patent/PT97792B/en not_active IP Right Cessation
- 1991-05-29 BR BR919102205A patent/BR9102205A/en not_active Application Discontinuation
- 1991-05-30 RU SU914895672A patent/RU2032126C1/en active
- 1991-05-30 FI FI912607A patent/FI101724B1/en active
- 1991-05-30 CA CA002043605A patent/CA2043605C/en not_active Expired - Lifetime
- 1991-05-31 JP JP3155178A patent/JP3050950B2/en not_active Expired - Lifetime
- 1991-05-31 CN CN91103739A patent/CN1035959C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE137938C1 (en) * | ||||
| US3163495A (en) * | 1962-05-02 | 1964-12-29 | Greenawalt John Eckert | In the recovery of chemicals from the incineration of waste black liquor, the method f eliminating noxious compounds entrained in the combustion gas |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7718491A (en) | 1991-12-05 |
| BR9102205A (en) | 1992-01-07 |
| SE9001958D0 (en) | 1990-05-31 |
| FI912607A0 (en) | 1991-05-30 |
| FI101724B (en) | 1998-08-14 |
| ATE127180T1 (en) | 1995-09-15 |
| DE69112496D1 (en) | 1995-10-05 |
| FI912607A (en) | 1991-12-01 |
| PT97792B (en) | 1998-10-30 |
| JP3050950B2 (en) | 2000-06-12 |
| KR910020369A (en) | 1991-12-20 |
| AU643522B2 (en) | 1993-11-18 |
| ZA913732B (en) | 1992-02-26 |
| CN1057500A (en) | 1992-01-01 |
| EP0459963B1 (en) | 1995-08-30 |
| FI101724B1 (en) | 1998-08-14 |
| ES2078500T3 (en) | 1995-12-16 |
| RU2032126C1 (en) | 1995-03-27 |
| DE69112496T2 (en) | 1996-02-08 |
| CA2043605C (en) | 2001-12-04 |
| NO911969L (en) | 1991-12-02 |
| SE466268B (en) | 1992-01-20 |
| CA2043605A1 (en) | 1991-12-01 |
| NO911969D0 (en) | 1991-05-22 |
| NO176365C (en) | 1995-03-22 |
| NO176365B (en) | 1994-12-12 |
| SE9001958L (en) | 1991-12-01 |
| NZ238221A (en) | 1993-10-26 |
| EP0459963A1 (en) | 1991-12-04 |
| JPH05140887A (en) | 1993-06-08 |
| PT97792A (en) | 1992-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |