GB2271560A - Method for reducing the harmful-substance content of flue gases in a furnace unit - Google Patents
Method for reducing the harmful-substance content of flue gases in a furnace unit Download PDFInfo
- Publication number
- GB2271560A GB2271560A GB9320054A GB9320054A GB2271560A GB 2271560 A GB2271560 A GB 2271560A GB 9320054 A GB9320054 A GB 9320054A GB 9320054 A GB9320054 A GB 9320054A GB 2271560 A GB2271560 A GB 2271560A
- Authority
- GB
- United Kingdom
- Prior art keywords
- furnace
- condition
- adsorbing medium
- carbonate
- dust
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 37
- 239000000126 substance Substances 0.000 title claims description 16
- 239000003546 flue gas Substances 0.000 title description 17
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 16
- 239000000428 dust Substances 0.000 claims description 15
- 239000000654 additive Substances 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- 238000005202 decontamination Methods 0.000 claims description 2
- 230000003588 decontaminative effect Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 239000001095 magnesium carbonate Substances 0.000 description 7
- 235000014380 magnesium carbonate Nutrition 0.000 description 7
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 7
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 5
- 239000003518 caustics Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 4
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 3
- 235000017550 sodium carbonate Nutrition 0.000 description 3
- 239000002594 sorbent Substances 0.000 description 3
- BHMLFPOTZYRDKA-IRXDYDNUSA-N (2s)-2-[(s)-(2-iodophenoxy)-phenylmethyl]morpholine Chemical compound IC1=CC=CC=C1O[C@@H](C=1C=CC=CC=1)[C@H]1OCCNC1 BHMLFPOTZYRDKA-IRXDYDNUSA-N 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000004291 sulphur dioxide Substances 0.000 description 1
- 235000010269 sulphur dioxide Nutrition 0.000 description 1
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
-
- 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
- B01D53/68—Halogens or halogen compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/12—Inorganic compounds
- C10L1/1233—Inorganic compounds oxygen containing compounds, e.g. oxides, hydroxides, acids and salts thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/02—Use of additives to fuels or fires for particular purposes for reducing smoke development
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
2271560 METHOD FOR REDUCING THE HARMFUL-SUBSTANCE CONTENT OF FLUE GASES IN
A FURNACE UNIT 11 The invention relates to a method for reducing the harmful- substance content of f lue gases, as are usually released in a furnace unit in the course of a pyroprocess.
According to the type and quantity of the treated material and the fuel or gas used and the burning conditions, harmful substances contained in the material to be burnt, the fuel etc., like S02,1 HCl, NOx, HF or organic acids, are released and removed with the flue gases.
Numerous suggestions for reducing the harmful substances in the flue gases have been made in past decades. A substantial part of them relates to desulphurizing methods which operate predominantly in a damp medium. Thus, wet methods based on calcium are known, where with the use of burnt lime or limestone as adsorbing medium the gaseous harmful substances are washed out of the flue gas and are chemically bound. Calcium sulphate is produced as end product, it being partially dumped, partially used by the construction industry.
Such desulphurizing methods are used above all in power stations and large combustion installations. They require a very high expenditure in terms of apparatus and process technology and in part react extremely sensitively to fluctuations in the composition of the flue gas.
While the flue-gas cleaning for large installations of this kind is essentially technically solved, as before there is an urgent need to have a technique available for the flue-gas cleaning of small installations, which also operates reliably with greatly fluctuating emissions, requires low investment costs, enables a simple process technique and can be easily integrated into existing installations. In this connection, the invention has recognized that wet methods remove, and dry additive methods have, substantial advantages. In fact, the invention suggests in its most general embodiment a method for reducing the harmful- substance content of flue gases in a furnace unit having the following features: there is supplied to the furnace an oxide, inorganic adsorbing medium in combination with sodium carbonate (Na2CO3) or sodium hydrogen carbonate as additive, the dust-like particles of the adsorbing medium and of the additive concentrated with harmful substances (the furnace dust) are removed with the flue gas from the furnace and supplied to an at least two-stage filter for the separation of the furnace dust into different grain fractions, 20 the coarser fraction of the furnace dust separated in the first filter stage is supplied again at least partially in the circulation to the furnace, while the fine fraction of the furnace dust separated in 25 the second filter stage and concentrated with harmful substances is removed from the filter and disposed of. The flue-gas cleaning method operates with a dry adsorbing medium in combination with sodium (hydrogen) carbonate as additive. The harmful substances, in particular gaseous sulphur dioxide and hydrogen chloride, but also HF, NO, or organic acids, are extracted from the flue gas through accumulation on solid sorbents. The dry, contaminated reaction product formed in this way is separated by means of a filter. In this respect, in addition to the use of the combined sorbent, the arrangement of a two-stage filter R is essential, in which the furnace dust is divided into dif ferent grain fractions (a coarser one and a f iner one). It has namely been found that in particular with a fluctuating flue-gas characteristic property a secure binding of the harmful substances into the sorbents essentially depends on the following measures:
The harmful substances can accumulate in particular on the f iner particles of the furnace dust in a larger concentration (among other things due to a specifically higher surface).
The adsorbing action is also substantially dependent on the period of dwell of the adsorbing medium/additive in the furnace.
In this sense the separating of the f ilter for dividing of f a coarser fraction from a finer fraction and the at least partial return of the coarser fraction into the furnace favours the efficiency attainable with the method described twice over.
A particular advantage also consists in that the furnace dust which is already contaminated and returned from the f irst f ilter stage into the furnace can be supplemented by dusts of similar composition (for example from parallel furnace installations). In this respect, the adsorbing medium can itself consist at least in part of a material which is already contaminated.
An embodiment of the method provides to replace the oxide adsorbing medium up to 50% by mass with appropriate carbonate material.
With the f lue-gas cleaning of a rotating cylindrical furnace for the manufacture of sintered magnesite, the adsorbing medium could consist, for example, of dust-like caustic MgO, which is replaced by raw magnesite up to 50% by mass. The different grain sizes (caustic Mgo- < 500 pm, raw magnesite < 6 mm) in this respect at the same time promote an in-situ pelletizing or formation of granulated material in the rotating cylindrical furnace so that the caustic MgO can be removed from the furnace as clinker to a considerable extent. For such an application, which can analogously also be transferred to lime or dolomite furnacesl the particular advantage of a combination of a sintering process and a flue- gas cleaning is thus given.
The additive used (sodium carbonate or sodium bicarbonate) is in this respect added in accordance with an embodiment in a quantity of 0.5 to 2. 0 % by mass in relation to the solids delivered to the furnace. As a rule a mass portion of 1.0 % will suffice. The additive can be used in a grain fraction < 100 pm.
Dependent on the local conditions, the adsorbing medium can also be delivered to the furnace in the form of finer dusts (< 200 pm).
It has been found to be advantageous to select the furnace temperature to be so high that compared with normal operation an increased melting phase portion forms in the sinter material. This applies in particular to the named applications with the manufacture of sintered magnesite, sintered dolomite or suchlike, because in this way the pelletizing/formation of granulated material is promoted.
The separation grain size in the multistage filter is likewise selected in dependence upon the local prevailing conditions. In any case it is lower than the upper grain limit of the delivered adsorbing medium and amounts, for example, to 150 pm or less.
The portion of the adsorbing medium returned from the first filter stage into the furnace is set such that the solid particles in each case have such an adequately long period of dwell in the furnace that the desired degree of decontamination of the flue gas is achieved. In this respect, through repeated circulatory guiding of the coarser dust fraction and thus an increased period of dwell of the adsorbing material in the furnace, an increasing optimization of the flue-gas cleaning is achieved.
4 5; I. 1 At the same time it is to be ensured that the quantity of supplied additive is adjusted such that the sinter material removed from the furnace has as low a content of alkalis as possible, which in the event of the manufacture of sintered magnesite should not exceed 0.2 by mass.
Even if the chemical reaction processes with the use of the method described have not yet been definitively clarified, tests have shown that with the use of caustic magnesite as adsorbing medium and sodium hydrogen carbonate as additive the following chemical reactions occur:
with the adsorbing medium caustic MgO:
S02 + MgO M9S03 M9S03 + k02 M9S04 2 HCl + MgO M9C12 + H20 with the additive sodium bicarbonate:
S02 + '02 + 2NaHCO3 = Na2S04 + H20 + 2C02 HCl + NaHC03 = NaCl + H20 + C02 The excellent combinatory ef fect is based among other things also on the high basicity of the additive promoting the absorption, and the specific surface properties of the adsorbing medium used.
The method described can be realized without great constructional expenditure. It is suitable in particular for small installations, like sinter furnaces, refuse combustion installations etc.. The operational costs are low. In particular when the adsorbing medium at the same time serves the manufacture of a burnt end product, the costs for this are negligible. However, above all the method can also be used with greatly fluctuating emissions in the flue gas, whereby it presents itself to measure the harmful -substance concentrations in the f lue gas continuously and - in dependence on the values determined in this way - to regulate the addition quantity of the adsorbing medium/additive and/or the quantity of the returned dust from the f irst f ilter stage.
The method can be used both with discontinuous and with continuous operating conditions.
Tests have shown that emission values with S02 of 1, 320 to 1, 830 mg/Nm3 f lue gas with peaks to over 6, 000 mg/Nm' can be reduced with the method in accordance with the invention to values under 250 mg/NM3. With HC1, values of about 200 mg/Nm3 (with peaks to 1,700 mg/NM3) could be reduced long-term to values below 30 mg/NM3. These indications refer to a furnace for burning sintered magnesite with the use of caustic MgO as adsorbing medium, which was replaced to 20 -W by mass with raw magnesite (< 6 mm) and the addition of 1.0 % by mass (in relation to the remaining solids) of f inely-grained sodium bicarbonate.
W 101
Claims (15)
1.3 1.5
2. Method according to claim 1 with the condition that MgO and/or CaO is (are) used as oxide adsorbing medium.
3. Method according to claim 1 or 2 with the condition that the adsorbing medium is used in a grain fraction < 500 pm.
4. Method according to claim 3 with the condition that the adsorbing medium is used in a grain fraction < 200 pm.
5. Method according to one of claims 1 to 4 with the condition that the portion of the sodium (hydrogen) carbonate, in relation to the total mass of the solids delivered to the furnace, amounts to 0.5 to 2.0 by mass.
6. Method according to one of claims 1 to 5 with the condition that the sodium (hydrogen) carbonate is used in a grain fraction < 100 pm.
-C
7. Method according to one of claims 1 to 6 with the condition that the oxide adsorbing medium is replaced up to 50% by mass with an appropriate carbonate material.
8. Method according to claim 7 with the condition that the carbonate material is used in a grain fraction < 6 mm.
9. Method according to one of claims 1 to 8 with the condition that the furnace temperature is selected to be so high that compared with normal operation an increased melting phase portion forms in the treated material.
10. Method according to one of claims 1 to 9 with the condition that the separation grain size between the first and second filter stage is set to a value which is smaller than the upper grain limit of the newly delivered adsorbing medium.
11. Method according to claim 10 with the condition that the separation grain size between the first and second filter stage is set at 150 pm or smaller.
12. Method according to one of claims 1 to 11 with the condition that in each case so much furnace dust is returned from the first filter stage into the furnace 1 -g- that the solid particles in each case have such a sufficiently long period of dwell in the furnace until the desired degree of decontamination of the f lue gas is achieved.
13. Method according to one of claims 1 to 12 with the condition that in each case so much furnace dust is returned from the first filter stage into the furnace and the quantity of the returned sodium (hydrogen) carbonate is set such that the sintered material removed from the furnace has a maximum content of alkalis of 0. 2 % by mass.
14. Method according to one of claims 1 to 13 with the condition that the finely-grained, contaminated, dust-like material removed from the second filter stage is dumped.
15. Method substantially as herein described as an exemplary embodiment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4233119A DE4233119C1 (en) | 1992-10-02 | 1992-10-02 | Process for reducing the pollutant content of flue gases in a furnace unit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9320054D0 GB9320054D0 (en) | 1993-11-17 |
| GB2271560A true GB2271560A (en) | 1994-04-20 |
| GB2271560B GB2271560B (en) | 1995-07-05 |
Family
ID=6469452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9320054A Expired - Fee Related GB2271560B (en) | 1992-10-02 | 1993-09-29 | Method for reducing the harmful-substance content of flue gases in a furnace unit |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT399462B (en) |
| DE (1) | DE4233119C1 (en) |
| FR (1) | FR2696472B1 (en) |
| GB (1) | GB2271560B (en) |
| IE (1) | IE66759B1 (en) |
| IT (1) | IT1272713B (en) |
| SK (1) | SK104693A3 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5688479A (en) * | 1994-12-22 | 1997-11-18 | Uop | Process for removing HCl from hydrocarbon streams |
| US8715600B1 (en) * | 2013-05-16 | 2014-05-06 | Babcock & Wilcox Power Generation Group, Inc. | Circulating dry scrubber |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3960279A1 (en) * | 2020-09-01 | 2022-03-02 | Primetals Technologies Austria GmbH | Recycling of valuable materials from exhaust gas purification |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135662A (en) * | 1983-02-26 | 1984-09-05 | Steinmueller Gmbh L & C | Method of binding sulphur compounds which are formed as reaction products during the combustion of fuels containing sulphur in a furnace |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3329342C2 (en) * | 1983-08-13 | 1986-10-30 | L. & C. Steinmüller GmbH, 5270 Gummersbach | Process for the treatment of flue gases from a steam generating plant |
| DE3521002A1 (en) * | 1984-01-07 | 1986-12-18 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Fluidised-bed technology for relatively small heat outputs with a fraction separator in the region of the firing space |
| DE3717191C1 (en) * | 1987-05-22 | 1988-08-25 | Energie Versorgungssyst Evs | Process for immobilising halogens on solids during the combustion of fossil fuels, refuse or the like |
| AT388312B (en) * | 1987-07-29 | 1989-06-12 | Waagner Biro Ag | Process and device for the dry, simultaneous separation of pollutants and reactor for carrying out the process |
| AT388883B (en) * | 1988-02-01 | 1989-09-11 | Waagner Biro Ag | METHOD FOR THE SIMULTANEOUS TREATMENT OF Noxious Gases From Exhaust Gases |
| DE3808586A1 (en) * | 1988-03-15 | 1989-09-28 | Paul Heilemann | Process and plant for decreasing the pollutant content in the exhaust gas of an exhaust gas source |
| GB8813270D0 (en) * | 1988-06-04 | 1988-07-06 | Plasma Products Ltd | Dry exhaust gas conditioning |
| DE4031379A1 (en) * | 1990-04-27 | 1991-10-31 | Sueddeutsche Kalkstickstoff | Reducing pollutant emissions in combustion processes - by spraying soln. contg. cyanamide, di:cyanamide and water-soluble calcium cpd. into combustion chamber |
-
1992
- 1992-10-02 DE DE4233119A patent/DE4233119C1/en not_active Expired - Fee Related
-
1993
- 1993-09-24 AT AT0192893A patent/AT399462B/en not_active IP Right Cessation
- 1993-09-29 GB GB9320054A patent/GB2271560B/en not_active Expired - Fee Related
- 1993-09-30 IT ITMI932087A patent/IT1272713B/en active IP Right Grant
- 1993-09-30 SK SK1046-93A patent/SK104693A3/en unknown
- 1993-10-01 FR FR9311740A patent/FR2696472B1/en not_active Expired - Fee Related
- 1993-10-01 IE IE930736A patent/IE66759B1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135662A (en) * | 1983-02-26 | 1984-09-05 | Steinmueller Gmbh L & C | Method of binding sulphur compounds which are formed as reaction products during the combustion of fuels containing sulphur in a furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5688479A (en) * | 1994-12-22 | 1997-11-18 | Uop | Process for removing HCl from hydrocarbon streams |
| US8715600B1 (en) * | 2013-05-16 | 2014-05-06 | Babcock & Wilcox Power Generation Group, Inc. | Circulating dry scrubber |
| US9097158B2 (en) | 2013-05-16 | 2015-08-04 | Babcock & Wilcox Power Generation Group, Inc. | Solids transport in flue gas desulfurization system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9320054D0 (en) | 1993-11-17 |
| FR2696472A1 (en) | 1994-04-08 |
| IT1272713B (en) | 1997-06-26 |
| ATA192893A (en) | 1994-10-15 |
| IE66759B1 (en) | 1996-02-07 |
| SK104693A3 (en) | 1994-05-11 |
| AT399462B (en) | 1995-05-26 |
| FR2696472B1 (en) | 1995-06-09 |
| DE4233119C1 (en) | 1993-12-09 |
| ITMI932087A0 (en) | 1993-09-30 |
| IE930736A1 (en) | 1994-04-06 |
| GB2271560B (en) | 1995-07-05 |
| ITMI932087A1 (en) | 1995-03-30 |
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