DE3137359A1 - Process for treating waste waters from flue gas desulphurisation plants - Google Patents
Process for treating waste waters from flue gas desulphurisation plantsInfo
- Publication number
- DE3137359A1 DE3137359A1 DE19813137359 DE3137359A DE3137359A1 DE 3137359 A1 DE3137359 A1 DE 3137359A1 DE 19813137359 DE19813137359 DE 19813137359 DE 3137359 A DE3137359 A DE 3137359A DE 3137359 A1 DE3137359 A1 DE 3137359A1
- Authority
- DE
- Germany
- Prior art keywords
- flue gas
- waste water
- scrubbing
- wastewater
- treating waste
- 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.)
- Withdrawn
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000003546 flue gas Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000470 constituent Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract description 3
- 239000001110 calcium chloride Substances 0.000 abstract description 3
- 229910001628 calcium chloride Inorganic materials 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000005201 scrubbing Methods 0.000 abstract 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 1
- 239000000920 calcium hydroxide Substances 0.000 abstract 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 229910052602 gypsum Inorganic materials 0.000 abstract 1
- 239000010440 gypsum Substances 0.000 abstract 1
- 239000003643 water by type Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229940079826 hydrogen sulfite Drugs 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009333 weeding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- 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
-
- 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
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
Beschreibung und Erläuterung zur J'ätenan..eldungDescription and explanation of the weeding application
VERFAHREN ZUR AUFBEREITUNG VON ABWÄSSERN AUS RAUCGAS-ENTSCHWEFELUNGS2NLAGt'N Die Abwässer aus nassen Rauchgasentschwefelungsanlagen ent-,ehen hauptsächlich bei der Waschung des durch Reaktion mit Calciumverbindungen gebildeten Calciumsulfat-di-hydrates.PROCESS FOR TREATMENT OF WASTE WATER FROM RAUCGAS DESULFURIZATION PLANTS The wastewater from wet flue gas desulphurisation systems is mainly from washing the calcium sulfate dihydrate formed by reaction with calcium compounds.
Infolge des Restfeuchtegehaltes an Waschflüssigkeit werden dabei vom Abwasser Bestandteile der Waschflüssigkeit aufgenommen. Entsprechend gelangen in der Waschflüssigkeit gelöste oder suspendierte Substanzen in das Abwasser, wenn zur Verminderung de Salzfracht in der Absorptionslösung ein Teil der Flüssigkeit durch Wasser ersetzt erden muß.As a result of the residual moisture content of the washing liquid, the Waste water components of the washing liquid added. Accordingly, in the washing liquid dissolved or suspended substances in the wastewater, if a part of the liquid to reduce the salt load in the absorption solution replaced by water.
Die so entstandenen Abwässer enthalten eine gewisse Menge an oidierbaren Stoffen, die einen chemischen Sauerstoffbedarf verursachen. dabei hAndelt es sich vor allem um nicht oxidierte Sulfit-, bzw. Hydrogensulfitionen sowie um deren Salze.The wastewater produced in this way contains a certain amount of oidable Substances that cause a chemical need for oxygen. it is about especially unoxidized sulfite or hydrogen sulfite ions and their salts.
Daneben können die Abwässer auch organische Bestandteile, wie z. B. Carbon- oder Sulfonsäuren, enthalten, die der Waschrlüssigkeit als Absorptions- oder Filtrations-Hilfsstoffe zugesetzt wurden.In addition, the wastewater can also contain organic components, such as. B. Carboxylic or sulfonic acids, which the washing liquid as absorption or filtration aids have been added.
In einer anderen Patentanmeldung - Nr. P 31 35 623.0 -ist ein Verfahren zur Minderung des chemischen Sauerstoffbedarfs i;> den Abwässern von Rauchgasentschwefelungsanlagen beschrieben. Nach dieser Patentanmeldung ist vorgesehen, den chemischen Sauerstoffbedarf in den Abwässern von Rauchgasentschwefelungsanlagen durch gezielte pH-Wert-Absenkung des Abwassers und/oder durch chemische Reaktionen der im Abwasser befindlichen den hohen Sauerstoffbedarf bedingenden Komponenten auf ein zulässiges Maß zu reduzieren.In another patent application - No. P 31 35 623.0 - is a method to reduce the chemical oxygen demand i;> the waste water from flue gas desulphurisation systems described. According to this patent application, the chemical oxygen demand is provided in the wastewater from flue gas desulphurisation systems through targeted lowering of the pH value of the wastewater and / or by chemical reactions of those in the wastewater to reduce components causing high oxygen demand to a permissible level.
Bei weiteren Untersuchungen hat sich gezeigt, daß auch noch eine andersartige Mcthode zur Absenkung des chemischen Sauerstoffbecnarfs im Abwasser von Rauchgasentschwefelungsanlagen in Frage kommt.Further investigations have shown that there is also a different kind of Method for lowering the chemical oxygen demand in waste water from flue gas desulphurisation systems can be considered.
zur Beschreibung und Erläuterung zur Patentanmeldung VRFAHREN ZUR AUFBEREITUNG VON ABWÄSSERN AUS RAUCHGAS-ENTSCHWj :LtyNGSANT.'jGEN Erfindungsgemäß wird zur Entfernung bzw. .Minderung des Gehaltes an Stoffen mit chemischem Sauerstoffbedarf im Abwasser von Rauchgasentschwefelungsanlagen vorgeschlagen, einen Teil des Abwassers odet die gesamte Abwassermenge in thermischen Kontakt mit einem Teil der Rauchgasmenge oder der gesamten Rauchgasmenge der Feuerungsanlage zu bringen. Dabei verdampfen und/oder desorbieren neben dem Wasser auch bevorzugt organische Verbindungen. Diese können dem Rauchgas zusammen mit dem Wasserdampf wieder zugeführt werden, so daß die für den Prozeß wichtigen Absorptionshilfsstoffe im Waschkreislauf erhalten bleiben. Der verbleibende, je nach Bedarf mehr oder weniger getrocknete Rückstand, der gegebenenfalls auch aus einer Suspension oder Lösung bestehen kann, die hauptsächlich Calciumchlorid enthält, kann entweder-deponiert oder nach Zusatz von Wasser abgeleitet werden.for the description and explanation of the patent application VRFAHREN ZUR TREATMENT OF WASTE WATER FROM SMOKE GAS ENTSCHWj: LtyNGSANT.'jGEN According to the invention is used to remove or reduce the content of substances with chemical oxygen demand Proposed in the wastewater from flue gas desulphurization systems, part of the wastewater odet the entire amount of waste water in thermal contact with part of the amount of flue gas or to bring the entire amount of flue gas to the combustion system. Evaporate in the process and / or desorb not only water but also preferably organic compounds. These can be fed back to the flue gas together with the steam, so that the absorption aids that are important for the process are retained in the washing cycle. The remaining residue, which is more or less dried depending on requirements, and the optionally can also consist of a suspension or solution containing mainly calcium chloride contains, can either be landfilled or drained off after adding water.
Zur Durchführung des Verfahrens wird vorgeschlagen, die auf zu arbeitende Abwassermenge in irgendeiner Form in einem Rauchgasstrom zu dispergieren. Dies kann in einer Rohrleitung oder in sonstwie geformten Apparaten erfolgen. Die Rauchgasmenge, die mit dem Abwasser in Berührung gebracht wird, kann so eingestellt serden, daß einmal die gesamte Abwassermenge ein;Ehließlich der oraar;ischen Komponenten verdampft, wobei aus dem Abwasser stammende anorganische Komponenten, hauptsächlich Calciumchlorid, als Feststoffe zurückbleiben. Auf der anderen Seite ist auch eine mehr oder weniger starke Verdampfung des Abwassers möglich, wodurch eine beliebig hohe Aufkonzentrierung der anorganischen Bestandteile eintritt. Die dann im Gas befindlichen Feststoffe oder aufkonzentrierten Flüssigkeitstropfen können mechanisch abgeschieden werden. Auch ist es möglich, durch geeignete Strömungsführung dafür zu sorgen, daß sich diese Stoffe an geeigneten Stellen im System absetzen und entnommen werden können.To carry out the process, it is proposed to work on the To disperse the amount of wastewater in any form in a flue gas stream. This can take place in a pipeline or in any other shaped apparatus. The amount of flue gas, which is brought into contact with the waste water can be set so that once the entire amount of wastewater; only the oraar; ical components evaporate, whereby inorganic components originating from the wastewater, mainly calcium chloride, remain as solids. On the other hand there is also one more or less strong evaporation of the wastewater possible, resulting in an arbitrarily high concentration of the inorganic constituents occurs. The solids then found in the gas or concentrated drops of liquid can be separated out mechanically. It is also possible, by means of suitable flow guidance, to ensure that these substances can be deposited and removed at suitable points in the system.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813137359 DE3137359A1 (en) | 1981-09-19 | 1981-09-19 | Process for treating waste waters from flue gas desulphurisation plants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813137359 DE3137359A1 (en) | 1981-09-19 | 1981-09-19 | Process for treating waste waters from flue gas desulphurisation plants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3137359A1 true DE3137359A1 (en) | 1983-04-14 |
Family
ID=6142154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19813137359 Withdrawn DE3137359A1 (en) | 1981-09-19 | 1981-09-19 | Process for treating waste waters from flue gas desulphurisation plants |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3137359A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830812A1 (en) * | 1987-09-16 | 1989-03-30 | Passamaquoddy Tribe | METHOD FOR REMOVING POLLUTANTS FROM AN EXHAUST FLOW |
| DE3804911A1 (en) * | 1988-02-17 | 1989-08-24 | Per Glindsjoe | METHOD AND DEVICE FOR GAS TREATMENT |
| EP0380742A1 (en) * | 1988-12-06 | 1990-08-08 | Kernforschungszentrum Karlsruhe Gmbh | Process for removing matter during flue gas scrubbing by drying and concentrating and apparatus for carrying out the process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE377747C (en) * | 1921-04-21 | 1923-06-26 | Otto Gutzwiller | Method and device for drying solid bodies in solution or in suspension within a liquid |
| DE2124056A1 (en) * | 1971-05-14 | 1972-11-30 | Bamag Verfahrenstechnik Gmbh, 6308 Butzbach | Regeneration of solvents - used to wash acid gases from natural gas, by stripping with flue gases |
-
1981
- 1981-09-19 DE DE19813137359 patent/DE3137359A1/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE377747C (en) * | 1921-04-21 | 1923-06-26 | Otto Gutzwiller | Method and device for drying solid bodies in solution or in suspension within a liquid |
| DE2124056A1 (en) * | 1971-05-14 | 1972-11-30 | Bamag Verfahrenstechnik Gmbh, 6308 Butzbach | Regeneration of solvents - used to wash acid gases from natural gas, by stripping with flue gases |
Non-Patent Citations (3)
| Title |
|---|
| DD-B.: Fortschritte der Wasserchemie, Berlin 1965, S.95-98 * |
| DE-B.: Ullmanns Enc. der techn. Chemie, 4.Aufl. 1981, S.449, 450, 464, (gutachtlich) * |
| DE-Z.: Chemie-Anlagen-Verfahren 1974, 79-87 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3830812A1 (en) * | 1987-09-16 | 1989-03-30 | Passamaquoddy Tribe | METHOD FOR REMOVING POLLUTANTS FROM AN EXHAUST FLOW |
| DE3804911A1 (en) * | 1988-02-17 | 1989-08-24 | Per Glindsjoe | METHOD AND DEVICE FOR GAS TREATMENT |
| EP0380742A1 (en) * | 1988-12-06 | 1990-08-08 | Kernforschungszentrum Karlsruhe Gmbh | Process for removing matter during flue gas scrubbing by drying and concentrating and apparatus for carrying out the process |
| US5112585A (en) * | 1988-12-06 | 1992-05-12 | Kernforschungszentrum Karlsruhe Gmbh | Process of removing flue gas cleaning residues during the wet cleaning of flue gases by drying and construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8139 | Disposal/non-payment of the annual fee |