CA1284802C - Process of removing polluants from exhaust gases - Google Patents
Process of removing polluants from exhaust gasesInfo
- Publication number
- CA1284802C CA1284802C CA000525587A CA525587A CA1284802C CA 1284802 C CA1284802 C CA 1284802C CA 000525587 A CA000525587 A CA 000525587A CA 525587 A CA525587 A CA 525587A CA 1284802 C CA1284802 C CA 1284802C
- Authority
- CA
- Canada
- Prior art keywords
- solids
- cement
- exhaust gases
- process according
- fluidized bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Gas Separation By Absorption (AREA)
- Processing Of Solid Wastes (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
For a removal of polluants from the exhaust gases from burning processes carried out in the processing of stones and earths, a dry process is proposed in which the exhaust gases are contacted at a temperature from 50 to 100° C with a particulate solid sorbent in a solids-circulating system. The system consists of a fluidized bed absorber, a solids separator and a recycling line, and the product of the reaction of the sorbent with the polluants is supplied to a cement-making process.
For a removal of polluants from the exhaust gases from burning processes carried out in the processing of stones and earths, a dry process is proposed in which the exhaust gases are contacted at a temperature from 50 to 100° C with a particulate solid sorbent in a solids-circulating system. The system consists of a fluidized bed absorber, a solids separator and a recycling line, and the product of the reaction of the sorbent with the polluants is supplied to a cement-making process.
Description
~2~8~%
The ~resent invention relates to a process of removing polluants from exhaust gases from burning processes carried out in the processing of stones and earths, particu-larly in the production of cement~ In order to comply with the ecological regulations which are in force, plants for processing stones and earths are increasingly equippe~ with means for a removal of gaseous polluants.
In the known wet purifying processes, the exhaust gases are subjected to dust collec-tion and are then treated with a sorbent, which is circulated. In that step the exhaust gases are cooled to such an extent that they must be reheated to a temperature which is about 20 C above the dew point temperature in order to avoid damage by corrosion.
As a rule, the reaction products become available at such a high rate that they cannot be entirely recycled in the production process. For this reason, wet purifying processes usually involve high plant costs and operating costs and said costs often oppose a quick adoption of a purification of exhaust gases.
In the production of cement it has also been attempted to subject the exhaust gases to a dry purification at 300 to 850 C. In that practice it has been found, however, that ~.
at temperatures above 500C the exhaust gases often contain less then lO0 mg/sm3Of SO2, which is the polluant that is primarily of interest here, because a major part of the sulfur that is introduced into the cement-producing process with the fuel is absorbed by the ground mixture of raw materials in that temperature range and is incorporated in the clinker.
Such favorable conditions are not obtained in other burning processes, which are carried out in the processing of stones and earths and which require a removal not only of the sulfur contained in the fuel but also of large amouts of other polluants, such as chlorides or fluorides, from the exhaust gases whereas the product cannot absorb the polluants in an appreciable extent.
In the cement-producing process, sulfur is intro-duced into the burning process also by the ground mixture of raw materials. Part of said sulfur comes from organic or sulfidic sulfur compounds, which are decomposed even at low temperatures so that SO2 is released during the preheating of the ground mixture of raw materials and S02 contents upn to 6000 mg/sm may be obtained. At the exhaust gas temperatures which are usually obtained in the cement process, virtually no S02 is absorbed by the raw material so that cement-producing plants must also be provided with an exhaust gas desulfurizer even though the exhaust gas contains only a small part of the sulfur which is introduced with the fuel.
Independently of the sorbent employed and of the ration of the quantity of sorbent to the quantity of polluant, a dry purification at temperatures from 200 to 400C will not be particularly effective and usually permits only less then 60% of the polluants to be removed from the exhaust gas unless catalytic purifying processes are employed, which are expensive and are not highly reliable in operation because dust is usually raised at a high rate.
~2~3~8~2 For this reason it is an object to propose for -the removal of polluants from the exhaust gases from the burning processes carried out in the processirig of stones and earths a process which is generally applicable and which is more econom:ical than the known processes.
According to the present invention, there is provided a process of removing polluants from exhaust gases carried out in the processing of stones and earths, particularly in the production of cement, wherein the exhaust gases are contacted at temperatures from 50 to 100C
with a solid particulate sorbent in a solids-circulating system consisting of a sorbent-containing fluidized bed, a solids separator and a recycling line and the resulting product is entirely supplied to a cement-producing process, wherein said sorbent consists of limestone containing more than 90~ CaCO3, quicklime, slaked lime or a partly calcined ground mixture of raw materials which are used in the production of cement.
In the process in accordance with the invention the contact time at relatively low temperatures, which is usually too short in other dry purifying processes, may be increased as desired, and the reaction product otained can be subjected to further processing or can be disposed of whithout a need for special precautions, by which the economy of other processes is often adversely afEected to a high degree.
The exhaust gases are suitably at a temperature between 50 to 100C before they enter the solids-circulating system. If a tempexature in that range cannot be obtained, the exhaust gases may be cooled in the fluidized bed to a temperature from 50 to 100C by means of sprayed water. Because plants for burning stones and earths usually comprise a final dust collector, the latter may be used as a solids separator in the solids- circulating '1~
system.
The main advantage of the process in accordance with the invention resides in that the sorbent may consist of materials which are used in the production of cement, such as a ground mixture of raw materials, limestone containing more than 90~ CaCO3, quicklime, slaked lime or a partly calcined ground mix-ture of raw materials and said materials can subsequently be recycled to a cement-producing process.
The temperature in -the fluidized bed may be controlled to an optimum value by a spraying of waterand the rate at which the sorbent is supplied may be controlled in dependence on the polluant content of the pure gas.
Further details will be explained with reference to an example in which exhaust gases from a cement-producing process are desulfurized and with reference to Figure 1, which is a simplified flow scheme of the process.
The solids-circulating system, consisting of a fluidized bed reactor 1, a solids separator 2 and a recycling line 3~is supplied through line 4 with water to be sprayed, through line 5 with sorbent and through line 7 with the exhaust gas that is to be desulfurized. Exhaust gas which has been substantially desulfuriæed leaves the fluidized bed reactor 1 at its top and is subjected to dust collection in th~ solids separator 2 and is then delivered via the fan 8 and the line 9 to the chimney. A conveyor provided below the solids separator 2 serves to convey the separated dust to the recycling line 3, in which the dust is finally returned to the fluidized bed reactor 1. Part of the circulating solid particles is removed through line 7 from the solids- circulating system and is suppl:ied to the cement-producing process at a suitable location.
Individual components contained in the residual material, such as heavy metals, may be selectively separated and discharged through line 10 separately of the remaining substances.
In dependence on the provision of heat-recovering means (waste heat boilers, water heaters, mills), and on the nature thereof, the exhaust gases become available at a tempera-ture from lO0 to 450C. They may contain dust at a rate of as much as lO0 g/m3 unless they are passed through a mill in that case their dust content may amount to as much as lO00 g/sm3 and it may be desirable to effect a preliminary dust collection by means of an electrostatic precipitator or a mecha-nical separator so that the circulation of solids in the solids-circulating system is limited to the optim~m rate for the desul-furization. In such cases an addition of a separate sorbent may be omitted entirely or partly. In the solids separator the dust content of the exhaust gases is decreased to a value below 50 mg/sm3.
In dependence on the composition of the raw mate-rial the exhaust gas may contain as much as 6000 mg/sm3 SO2.
That So2 content may be decreased by means of the process in accordance with the invention to values below 50 mg/sm SO2.
That SO2 content may be decreased by means of the process in accordance with the invention to values below 50 mg/sm3. The S2 contents which are legally permissible at the present time are 400 mg/sm3 in Germany and 500 mg/sm in Switzerland.
Another advantage afforded by the process resides in that the economy can be improved because the f~els used in the burning processes may contain heavy metals, inclusive of class I
polluants, such a cadmium, thallium, mercury and the like. Sub~
stantially the entire content of such polluants is bonded in the fluidized bed adsorber to the particularly fine-grained solid particles and in a solids classifier, e.g. in a multifield eletrostatic precipitator, can be almost entirely removed sepa-rately from the other residual materisls and can be removed from the process independently of those reaction products which are recycled to a cement-producing process.
The solid particles which are thus removed from the process contain polluants in a high concentration and constitute only a small part of the entire quantity of reaction products which become available. Because said solid particles consist of stable, water-insoluble compounds, they can be recylcled to the prodcution process at a suitable location unless such recycling would adversely affect the product. In the production of cement, said solid particles may be admixed to the clinker or cement as it is groud. Alternatively the solid particles which have been removed fromt he process may be processed for a revovery of pol-luants in a metallic form or another usable form. 90% of said polluants can be removed from the exhaust gas by means of the process in accordance whith the invention and can then be dis-posed of in an ecologically satisfactory manner.
The process in accordance with the invention hasexperimentally be carried out in conjunction with cement-produc-ing plant. The raw materials contained 0.3 to 0.4% sulfide, based on the weight of the raw material, and the SO2 contents in the partial stream of exhaust gases to be examined amounted to as much as 3600 mg/sm3 if the process in accordance with the invention was not used. By the use of the process, the SO2 content has been decreased to values which are dlstinctly beow 400 mg/sm3. In that case the sorbent employed consisted of a ground mixture of raw materials whith an admixture of slaked lime in such an amount that the skaled lime provided about 5O% of the calcium which was stoichiometrically required.
The ~resent invention relates to a process of removing polluants from exhaust gases from burning processes carried out in the processing of stones and earths, particu-larly in the production of cement~ In order to comply with the ecological regulations which are in force, plants for processing stones and earths are increasingly equippe~ with means for a removal of gaseous polluants.
In the known wet purifying processes, the exhaust gases are subjected to dust collec-tion and are then treated with a sorbent, which is circulated. In that step the exhaust gases are cooled to such an extent that they must be reheated to a temperature which is about 20 C above the dew point temperature in order to avoid damage by corrosion.
As a rule, the reaction products become available at such a high rate that they cannot be entirely recycled in the production process. For this reason, wet purifying processes usually involve high plant costs and operating costs and said costs often oppose a quick adoption of a purification of exhaust gases.
In the production of cement it has also been attempted to subject the exhaust gases to a dry purification at 300 to 850 C. In that practice it has been found, however, that ~.
at temperatures above 500C the exhaust gases often contain less then lO0 mg/sm3Of SO2, which is the polluant that is primarily of interest here, because a major part of the sulfur that is introduced into the cement-producing process with the fuel is absorbed by the ground mixture of raw materials in that temperature range and is incorporated in the clinker.
Such favorable conditions are not obtained in other burning processes, which are carried out in the processing of stones and earths and which require a removal not only of the sulfur contained in the fuel but also of large amouts of other polluants, such as chlorides or fluorides, from the exhaust gases whereas the product cannot absorb the polluants in an appreciable extent.
In the cement-producing process, sulfur is intro-duced into the burning process also by the ground mixture of raw materials. Part of said sulfur comes from organic or sulfidic sulfur compounds, which are decomposed even at low temperatures so that SO2 is released during the preheating of the ground mixture of raw materials and S02 contents upn to 6000 mg/sm may be obtained. At the exhaust gas temperatures which are usually obtained in the cement process, virtually no S02 is absorbed by the raw material so that cement-producing plants must also be provided with an exhaust gas desulfurizer even though the exhaust gas contains only a small part of the sulfur which is introduced with the fuel.
Independently of the sorbent employed and of the ration of the quantity of sorbent to the quantity of polluant, a dry purification at temperatures from 200 to 400C will not be particularly effective and usually permits only less then 60% of the polluants to be removed from the exhaust gas unless catalytic purifying processes are employed, which are expensive and are not highly reliable in operation because dust is usually raised at a high rate.
~2~3~8~2 For this reason it is an object to propose for -the removal of polluants from the exhaust gases from the burning processes carried out in the processirig of stones and earths a process which is generally applicable and which is more econom:ical than the known processes.
According to the present invention, there is provided a process of removing polluants from exhaust gases carried out in the processing of stones and earths, particularly in the production of cement, wherein the exhaust gases are contacted at temperatures from 50 to 100C
with a solid particulate sorbent in a solids-circulating system consisting of a sorbent-containing fluidized bed, a solids separator and a recycling line and the resulting product is entirely supplied to a cement-producing process, wherein said sorbent consists of limestone containing more than 90~ CaCO3, quicklime, slaked lime or a partly calcined ground mixture of raw materials which are used in the production of cement.
In the process in accordance with the invention the contact time at relatively low temperatures, which is usually too short in other dry purifying processes, may be increased as desired, and the reaction product otained can be subjected to further processing or can be disposed of whithout a need for special precautions, by which the economy of other processes is often adversely afEected to a high degree.
The exhaust gases are suitably at a temperature between 50 to 100C before they enter the solids-circulating system. If a tempexature in that range cannot be obtained, the exhaust gases may be cooled in the fluidized bed to a temperature from 50 to 100C by means of sprayed water. Because plants for burning stones and earths usually comprise a final dust collector, the latter may be used as a solids separator in the solids- circulating '1~
system.
The main advantage of the process in accordance with the invention resides in that the sorbent may consist of materials which are used in the production of cement, such as a ground mixture of raw materials, limestone containing more than 90~ CaCO3, quicklime, slaked lime or a partly calcined ground mix-ture of raw materials and said materials can subsequently be recycled to a cement-producing process.
The temperature in -the fluidized bed may be controlled to an optimum value by a spraying of waterand the rate at which the sorbent is supplied may be controlled in dependence on the polluant content of the pure gas.
Further details will be explained with reference to an example in which exhaust gases from a cement-producing process are desulfurized and with reference to Figure 1, which is a simplified flow scheme of the process.
The solids-circulating system, consisting of a fluidized bed reactor 1, a solids separator 2 and a recycling line 3~is supplied through line 4 with water to be sprayed, through line 5 with sorbent and through line 7 with the exhaust gas that is to be desulfurized. Exhaust gas which has been substantially desulfuriæed leaves the fluidized bed reactor 1 at its top and is subjected to dust collection in th~ solids separator 2 and is then delivered via the fan 8 and the line 9 to the chimney. A conveyor provided below the solids separator 2 serves to convey the separated dust to the recycling line 3, in which the dust is finally returned to the fluidized bed reactor 1. Part of the circulating solid particles is removed through line 7 from the solids- circulating system and is suppl:ied to the cement-producing process at a suitable location.
Individual components contained in the residual material, such as heavy metals, may be selectively separated and discharged through line 10 separately of the remaining substances.
In dependence on the provision of heat-recovering means (waste heat boilers, water heaters, mills), and on the nature thereof, the exhaust gases become available at a tempera-ture from lO0 to 450C. They may contain dust at a rate of as much as lO0 g/m3 unless they are passed through a mill in that case their dust content may amount to as much as lO00 g/sm3 and it may be desirable to effect a preliminary dust collection by means of an electrostatic precipitator or a mecha-nical separator so that the circulation of solids in the solids-circulating system is limited to the optim~m rate for the desul-furization. In such cases an addition of a separate sorbent may be omitted entirely or partly. In the solids separator the dust content of the exhaust gases is decreased to a value below 50 mg/sm3.
In dependence on the composition of the raw mate-rial the exhaust gas may contain as much as 6000 mg/sm3 SO2.
That So2 content may be decreased by means of the process in accordance with the invention to values below 50 mg/sm SO2.
That SO2 content may be decreased by means of the process in accordance with the invention to values below 50 mg/sm3. The S2 contents which are legally permissible at the present time are 400 mg/sm3 in Germany and 500 mg/sm in Switzerland.
Another advantage afforded by the process resides in that the economy can be improved because the f~els used in the burning processes may contain heavy metals, inclusive of class I
polluants, such a cadmium, thallium, mercury and the like. Sub~
stantially the entire content of such polluants is bonded in the fluidized bed adsorber to the particularly fine-grained solid particles and in a solids classifier, e.g. in a multifield eletrostatic precipitator, can be almost entirely removed sepa-rately from the other residual materisls and can be removed from the process independently of those reaction products which are recycled to a cement-producing process.
The solid particles which are thus removed from the process contain polluants in a high concentration and constitute only a small part of the entire quantity of reaction products which become available. Because said solid particles consist of stable, water-insoluble compounds, they can be recylcled to the prodcution process at a suitable location unless such recycling would adversely affect the product. In the production of cement, said solid particles may be admixed to the clinker or cement as it is groud. Alternatively the solid particles which have been removed fromt he process may be processed for a revovery of pol-luants in a metallic form or another usable form. 90% of said polluants can be removed from the exhaust gas by means of the process in accordance whith the invention and can then be dis-posed of in an ecologically satisfactory manner.
The process in accordance with the invention hasexperimentally be carried out in conjunction with cement-produc-ing plant. The raw materials contained 0.3 to 0.4% sulfide, based on the weight of the raw material, and the SO2 contents in the partial stream of exhaust gases to be examined amounted to as much as 3600 mg/sm3 if the process in accordance with the invention was not used. By the use of the process, the SO2 content has been decreased to values which are dlstinctly beow 400 mg/sm3. In that case the sorbent employed consisted of a ground mixture of raw materials whith an admixture of slaked lime in such an amount that the skaled lime provided about 5O% of the calcium which was stoichiometrically required.
Claims (8)
1. A process of removing polluants from exhaust gases carried out in the processing of stones and earths, particularly in the production of cement, wherein the exhaust gases are contacted at temperatures from 50 to 100°C
with a solid particulate sorbent in a solids-circulating system consisting of a sorbent-containing fluidized bed, a solids separator and a recycling line and the resulting product is entirely supplied to a cement-producing process, wherein said sorbent consists of limestone containing more than 90% CaCO3, quicklime, slaked lime or a partly calcined ground mixture of raw materials which are used in the production of cement.
with a solid particulate sorbent in a solids-circulating system consisting of a sorbent-containing fluidized bed, a solids separator and a recycling line and the resulting product is entirely supplied to a cement-producing process, wherein said sorbent consists of limestone containing more than 90% CaCO3, quicklime, slaked lime or a partly calcined ground mixture of raw materials which are used in the production of cement.
2. A process according to claim 1, wherein the exhaust gases are cooled to a temperature from 50 to 100°C
before they enter the solids-circulating system.
before they enter the solids-circulating system.
3. A process according to claim 1, wherein the exhaust gases are cooled to a temperature from 50 to 100°C
in the fluidized bed by means of sprayed water.
in the fluidized bed by means of sprayed water.
4. A process according to claim 1, wherein said solids separator consists of the final dust collector usually provided in a burning plant.
5. A process according to claim 1, wherein the temperature in the fluidized bed is controlled by means of sprayed water and the addition of sorbentis is controlled in dependence on the polluant content of the pure gas.
6. A process according to claim 2, 3 or 4, wherein the temperature in the fluidized bed is controlled by means of sprayed water and the addition of sorbentis is controlled in dependence on the polluant content of the pure gas.
7. A process according to claim 1, 2, 3, 4 or 5, wherein the solids are separated in a solids classifier, and the fine-grained solids which have been enriched with heavy metals, are mixed to the clinker obtained in the production of cement or are delivered to a separate processing.
8. A process according to claim 1, 2, 3, 4 or 5, wherein the solids are separated in a solids classifier, in a multifield electrostatic precipitator, and the fine-grained solids which have been enriched with heavy metals of class I, are mixed to the clinker obtained in the production of cement or are delivered to a separate proces-sing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853544764 DE3544764A1 (en) | 1985-12-18 | 1985-12-18 | METHOD FOR REMOVING POLLUTANTS FROM EXHAUST GAS |
| DEP3544764.8 | 1985-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1284802C true CA1284802C (en) | 1991-06-11 |
Family
ID=6288750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000525587A Expired - Lifetime CA1284802C (en) | 1985-12-18 | 1986-12-17 | Process of removing polluants from exhaust gases |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0228111B2 (en) |
| JP (1) | JPH0753224B2 (en) |
| AT (1) | ATE46088T1 (en) |
| CA (1) | CA1284802C (en) |
| CZ (1) | CZ280413B6 (en) |
| DD (1) | DD252767A5 (en) |
| DE (2) | DE3544764A1 (en) |
| DK (1) | DK165736C (en) |
| ES (1) | ES2011251T5 (en) |
| HU (1) | HU200706B (en) |
| SK (1) | SK278406B6 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2624399B1 (en) * | 1987-12-14 | 1992-01-24 | Champagnole Ciments | PROCESS FOR DECONTAMINATION OF HOT GASES OR FUMES EMITTED BY A FIREPLACE, INSTALLATION FOR ITS IMPLEMENTATION AND PRODUCT OBTAINED |
| DE3824880A1 (en) * | 1988-07-19 | 1990-01-25 | Noell Gmbh | METHOD AND DEVICE FOR TREATING GASES |
| AT394660B (en) * | 1989-07-28 | 1992-05-25 | Staudinger Gernot | METHOD FOR REMOVAL OR REDUCTION OF GASEOUS POLLUTANTS AND DEVICE FOR CARRYING OUT THIS PROCESS |
| DE3942092A1 (en) * | 1989-12-20 | 1991-06-27 | Metallgesellschaft Ag | METHOD FOR REDUCING NO (ARROW DOWN) X (ARROW DOWN) CONTENT IN EXHAUST GAS |
| DE4000795A1 (en) * | 1990-01-12 | 1991-07-18 | Krupp Polysius Ag | METHOD FOR PURIFYING THE EXHAUST GASES FROM PLANTS FOR PRODUCING CEMENT CLINKER |
| DE4018786A1 (en) * | 1990-06-12 | 1991-12-19 | Krupp Polysius Ag | METHOD FOR PURIFYING THE EXHAUST GASES FROM PLANTS FOR PRODUCING CEMENT CLINKER |
| DE4034498A1 (en) * | 1990-09-06 | 1992-03-12 | Metallgesellschaft Ag | METHOD FOR SEPARATING HEAVY METALS AND DIOXINES FROM COMBUSTION EXHAUST GASES |
| DE4206602C2 (en) * | 1992-03-03 | 1995-10-26 | Metallgesellschaft Ag | Process for removing pollutants from combustion exhaust gases and fluidized bed reactor therefor |
| DE4330593A1 (en) * | 1993-09-09 | 1995-03-16 | Krupp Polysius Ag | Process for cleaning flue gases |
| DE4401166A1 (en) * | 1994-01-17 | 1995-07-20 | Krupp Polysius Ag | Process for cleaning flue gases |
| DE19532862A1 (en) * | 1995-09-06 | 1997-03-13 | Graf Epe Gmbh | Plant cleaning waste gases by solids contacting in recirculated fluidised bed |
| CZ20014584A3 (en) * | 1999-06-18 | 2002-04-17 | F. L. Smidth & Co A/S | Desulfurizing process of exhaust gases and apparatus for making the same |
| US7390357B2 (en) * | 2002-10-02 | 2008-06-24 | F.L.Smidth A/S | Method and plant for manufacturing cement clinker |
| KR101015154B1 (en) * | 2010-10-05 | 2011-02-16 | 한국에너지기술연구원 | Internal and external circulating acid gas removal device for high temperature flue gas powder absorber containing sulfur oxide and boron compound and acid gas removal method using the same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3038457C2 (en) * | 1980-10-11 | 1983-11-10 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Use of a waste product from dry flue gas desulphurisation for the production of fly ash cement |
| DE3215793A1 (en) * | 1982-04-28 | 1983-11-03 | Klöckner-Humboldt-Deutz AG, 5000 Köln | METHOD AND DEVICE FOR REDUCING THE SULFURING CIRCUIT AND / OR THE SO (ARROW DOWN) 2 (ARROW DOWN) EMISSION IN A PLANT FOR BURNING FINE GRAIN GOODS |
| DE3235558A1 (en) * | 1982-09-25 | 1984-03-29 | Metallgesellschaft Ag, 6000 Frankfurt | METHOD FOR SEPARATING POLLUTANTS FROM EXHAUST GAS |
| DE3235559A1 (en) * | 1982-09-25 | 1984-05-24 | Metallgesellschaft Ag, 6000 Frankfurt | Process for the removal of sulphur oxides from flue gas |
| DE3322159A1 (en) * | 1983-06-21 | 1985-01-03 | Metallgesellschaft Ag, 6000 Frankfurt | METHOD FOR SEPARATING POLLUTANTS FROM EXHAUST GAS |
| DE3326935A1 (en) * | 1983-07-26 | 1985-02-07 | Krupp Polysius Ag, 4720 Beckum | Process for the elimination of pollutants from the exhaust gases of a rotary kiln |
| DK348583D0 (en) * | 1983-07-29 | 1983-07-29 | Smidth & Co As F L | METHOD AND APPARATUS FOR REMOVAL OF SULFUR OXIDES FROM HOT ROEGGAS BY THE TOUR METHOD |
| DE3415210C2 (en) * | 1984-01-07 | 1995-06-22 | Kloeckner Humboldt Deutz Ag | Process for the desulfurization of the flue gas from a furnace |
-
1985
- 1985-12-18 DE DE19853544764 patent/DE3544764A1/en not_active Withdrawn
-
1986
- 1986-11-27 EP EP86202110A patent/EP0228111B2/en not_active Expired - Lifetime
- 1986-11-27 DE DE8686202110T patent/DE3665410D1/en not_active Expired
- 1986-11-27 ES ES86202110T patent/ES2011251T5/en not_active Expired - Lifetime
- 1986-11-27 AT AT86202110T patent/ATE46088T1/en active
- 1986-12-10 CZ CS869150A patent/CZ280413B6/en unknown
- 1986-12-10 SK SK9150-86A patent/SK278406B6/en unknown
- 1986-12-11 JP JP61295702A patent/JPH0753224B2/en not_active Expired - Lifetime
- 1986-12-16 DD DD86297685A patent/DD252767A5/en not_active IP Right Cessation
- 1986-12-16 DK DK606386A patent/DK165736C/en not_active IP Right Cessation
- 1986-12-17 HU HU865268A patent/HU200706B/en not_active IP Right Cessation
- 1986-12-17 CA CA000525587A patent/CA1284802C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3665410D1 (en) | 1989-10-12 |
| ATE46088T1 (en) | 1989-09-15 |
| EP0228111B1 (en) | 1989-09-06 |
| JPH0753224B2 (en) | 1995-06-07 |
| DK606386A (en) | 1987-06-19 |
| ES2011251B3 (en) | 1990-01-01 |
| CZ915086A3 (en) | 1995-11-15 |
| JPS62144736A (en) | 1987-06-27 |
| SK915086A3 (en) | 1997-04-09 |
| EP0228111B2 (en) | 1994-06-15 |
| DK165736B (en) | 1993-01-11 |
| DE3544764A1 (en) | 1987-06-19 |
| SK278406B6 (en) | 1997-04-09 |
| CZ280413B6 (en) | 1996-01-17 |
| DD252767A5 (en) | 1987-12-30 |
| DK606386D0 (en) | 1986-12-16 |
| ES2011251T5 (en) | 1995-08-16 |
| EP0228111A1 (en) | 1987-07-08 |
| HU200706B (en) | 1990-08-28 |
| HUT49057A (en) | 1989-08-28 |
| DK165736C (en) | 1993-06-14 |
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