DE19707339A1 - Treating red sludge from mining operations, by mixing with chalk and water - Google Patents
Treating red sludge from mining operations, by mixing with chalk and waterInfo
- Publication number
- DE19707339A1 DE19707339A1 DE1997107339 DE19707339A DE19707339A1 DE 19707339 A1 DE19707339 A1 DE 19707339A1 DE 1997107339 DE1997107339 DE 1997107339 DE 19707339 A DE19707339 A DE 19707339A DE 19707339 A1 DE19707339 A1 DE 19707339A1
- Authority
- DE
- Germany
- Prior art keywords
- water
- chalk
- red mud
- limestone
- red sludge
- 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.)
- Ceased
Links
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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/529—Processes or devices for preparing lime water
-
- 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
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/043—Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Treating Waste Gases (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Verwertung von Rot schlamm aus einer Grubenwasser-Behandlungsanlage.The invention relates to a method for recycling red sludge from a mine water treatment plant.
Für die Entsorgung des bei der Grubenwasser-Behandlung an fallenden Rotschlammes sind erhebliche Aufwendungen für Ab setzbecken, Transport und Deponie sowie Deponieflächen er forderlich.For the disposal of the mine water treatment Falling red mud is a significant expense for Ab settling basin, transport and landfill as well as landfill areas conducive.
Zur Vermeidung derartiger Aufwendungen und Nachteile ist es bekannt, den Rotschlamm in Verbindung mit Bindemitteln und Zuschlagstoffen als Baustoff zu verwenden (DE 195 03 142; DD-PS 244 545), wobei ebenfalls erhebliche Aufwendungen für den Transport sowie für die Bereitstellung von Binde- und Dichtmitteln zur Vermeidung von Auswaschungen erforderlich sind.It is to avoid such expenses and disadvantages known, the red mud in connection with binders and To use aggregates as building material (DE 195 03 142; DD-PS 244 545), whereby also considerable expenses for the transport as well as for the provision of binding and Sealants required to avoid leaching are.
Der Erfindung liegt die Aufgabe zugrunde, den Rotschlamm am Kraftwerksstandort ohne zusätzliche Aufwendungen und bei Wegfall der bisherigen Aufwendungen für die Entsorgung zu verwerten.The invention is based, the red mud on the task Power plant location without additional expenses and at Elimination of previous disposal costs recycle.
In überraschender Weise wurde gefunden, daß der mit anderen entschwefelungswirksamen Substanzen versetzte Rotschlamm zur Herstellung einer Kalkstein-Suspension für die Entschwefe lung von Rauchgasen eines Kohlekraftwerkes in einem Gas wäscher verwendet wird.Surprisingly, it was found that with others Desulphurizing substances added red mud Production of a limestone suspension for desulphurization development of flue gases from a coal-fired power plant in one gas scrubber is used.
Für die Rauchgasentschwefelung in einem Gaswäscher wird mit hohen Aufwendungen für die Gewinnung und für den Transport des Kalksteins sowie für dessen Aufbereitung eine Kalkstein-Sus pension hergestellt. Es hat daher nicht an Versuchen ge fehlt, diese Aufwendungen für die Herstellung einer Absorp tionsmittel-Suspension zu mindern.For flue gas desulfurization in a gas scrubber high costs for extraction and transportation of the limestone and a limestone sus for its preparation pension manufactured. There has therefore been no attempt at it missing, these expenses for the production of an absorber reducing agent suspension.
So ist es bekannt, die bei der Entkarbonisierung der Dampf kraftwerkswässer entstehenden Schlämme und die bei der Naß entaschung anfallenden Schlämme direkt als Absorptionsmittel zu verwenden (DE 35 04 775, DD 213 358). Ebenso ist be kannt, die bei der Vorreinigung von Wässern mit Eisensalz- Aufschwemmungen entstehenden Abprodukte als Absorptionsmit tel für die Rauchgasentschwefelung einzusetzen (DE 43 19 461 DD 289 932). Diese Verfahrensweisen sind jedoch nur dann an wendbar, wenn in einem Kraftwerk derartige Wasserbehand lungstechnologien durchgeführt werden.So it is known to decarbonize the steam Power station water sludge and the wet Ash removal from the sludge directly as an absorbent to be used (DE 35 04 775, DD 213 358). Likewise, be knows that when pre-cleaning water with iron salt Wastes created as an absorption medium tel for flue gas desulfurization (DE 43 19 461 DD 289 932). However, these procedures are only on reversible when such water treatment in a power plant technologies are carried out.
Weiterhin wird für die Herstellung der Absorptionsmittelsus pension eine erhebliche Menge an Wasser sowie Aufwendungen für dessen Aufbereitung benötigt.Furthermore, for the manufacture of the absorbent pension a significant amount of water as well as expenses needed for its preparation.
An einem Ausführungsbeispiel wird die Erfindung näher erläu tert. Die Zeichnung zeigt das Anlagenschema für die Verwer tung des Rotschlammes zur Entschwefelung der Rauchgase eines Kohlekraftwerkes im Gaswäscher.The invention is explained in more detail using an exemplary embodiment tert. The drawing shows the system diagram for the recycling company treatment of the red mud to desulfurize the flue gases Coal-fired power plant in the scrubber.
Der Grubenwasserzuleiter 1 ist in die Wasserbehandlungsanla ge 2 des Kohlekraftwerkes eingebunden. Die Wasserbehand lungsanlage 2 ist zum einen mit dem Absetzbecken 3 und zum anderen mit der Kalkstein-Naßmühle 4 verbunden. Der Austrag der Kalkstein-Naßmühle 4 ist in den Absorptionsmittelbehäl ter 5 des Gaswäschers 6 eingebunden.The pit water supply 1 is integrated into the water treatment plant 2 of the coal-fired power plant. The water treatment plant 2 is connected on the one hand to the sedimentation basin 3 and on the other hand to the limestone wet mill 4 . The discharge of the limestone wet mill 4 is included in the absorption medium container 5 of the scrubber 6 .
Die Wirkungsweise ist folgende:
Das Grubenwasser 7 gelangt aus dem Grubenwasserzuleiter 1
zur Enteisenung in die Wasserbehandlungsanlage 2. Durch Zu
gabe von Kalkmilch 8 und falls erforderlich Flockungshilfs
mittel wird durch den chemischen Wirkungsmechanismus der
Rotschlamm 10 zur Verwertung gebildet und Rohwasser 9 für
den Kraftwerksprozeß erzeugt bzw. in ein Gewässer abgegeben.
Der Rotschlamm 10 enthält aufgrund der Grubenwasser-Inhalts
stoffe und der Kalkmilch-Inhaltsstoffe entschwefelungswirk
same Stoffe, wie Eisen-III-Hydroxid, sowie Wasser. Der Rot
schlamm 10 wird in die Kalkstein-Naßmühle 4 aufgegeben.The mode of action is as follows:
The pit water 7 passes from the pit water feeder 1 for iron removal into the water treatment plant 2 . By adding lime milk 8 and, if necessary, flocculation aids, the red mud 10 is formed for recycling by the chemical mechanism of action and raw water 9 is generated for the power plant process or released into a body of water. The red mud 10 contains due to the mine water content substances and the milk of lime ingredients desulfurization active substances, such as ferric hydroxide, and water. The red mud 10 is abandoned in the limestone wet mill 4 .
Gleichzeitig wird Kalksteinschotter und gegebenenfalls Was ser der Kalkstein-Naßmühle 4 aufgegeben. At the same time limestone gravel and what water the limestone wet mill 4 is abandoned.
Falls aus bestimmten Gründen der Rotschlamm 10 nicht im er forderlichen Umfang für die Rauchgasentschwefelung benötigt wird, so wird dieser in das Absetzbecken 3 gefördert und als Deponiegut 11 entsorgt bzw. zur weiteren Verwertung abgela gert. Durch den Naßmahlprozeß wird die Kalkstein-Rotschlamm-Sus pension 14 erzeugt und in den Absorptionsmittelbehälter 5 gefördert. Dabei gelangt die Suspension 15 in die Düsenebe nen des Gaswäschers 6.If, for certain reasons, the red mud 10 is not required to the extent necessary for the flue gas desulfurization, this is conveyed into the settling basin 3 and disposed of as landfill material 11 or stored for further use. By the wet grinding process, the limestone-red mud Sus pension 14 is generated and promoted in the absorbent container 5 . The suspension 15 passes into the nozzle plane of the scrubber 6 .
Durch den chemischen Wirkungsmechanismus, vor allem im in ternen Kreislauf des Gaswäschers 6 wird aus dem Rotschlamm farbloses Eisensulfat gebildet, daß mit dem REA-Wasser zur Ascheanfeuchtung ausgeschleust wird. Somit hat der verwende te Rotschlamm keinen negativen Einfluß auf die aus dem Kreislauf des Gaswäschers auszuschleusende Suspension für die Gipsgewinnung, so daß eine Gipsqualität mit hohem Weiß grad erzeugt wird.Due to the chemical mechanism of action, especially in the internal cycle of the gas scrubber 6 , colorless iron sulfate is formed from the red mud, which is removed with the FGD water for moistening the ash. Thus, the used red mud has no negative influence on the suspension for gypsum extraction to be removed from the circuit of the gas scrubber, so that a gypsum quality with a high degree of whiteness is produced.
Ebenso ist es möglich, den Rotschlamm 10, jedoch dann mit Kalksteinmehl und gegebenenfalls Wasser, direkt in den Ab sorptionsmittelbehälter 5 aufzugeben.It is also possible to give the red mud 10 , but then with limestone powder and optionally water, directly into the sorbent container 5 .
Durch die Erfindung treten folgende wesentliche Vorteile
auf:
The following significant advantages arise from the invention:
- 1. Der Aufwand für die Entsorgung des Rotschlammes, z. B. durch das Kraftwerk, entfällt.1. The effort for the disposal of the red mud, eg. B. due to the power plant.
- 2. Der Aufwand für die Bereitstellung von Deponieflächen und deren Betrieb entfällt.2. The effort for the provision of landfill areas and their operation is eliminated.
- 3. Der Aufwand für die Vermeidung von Auswaschungen aus dem Deponiekörper oder aus Baukörpern entfällt.3. The effort to avoid leaching from the Landfill bodies or buildings are no longer required.
- 4. Der Aufwand für die Bereitstellung des Kalksteines wird wesentlich vermindert4. The effort required to provide the limestone significantly reduced
- 5. Die Aufwendungen für das bereitzustellende Wasser werden wesentlich reduziert bzw. entfallen.5. The expenses for the water to be provided significantly reduced or eliminated.
- 6. Der Abwasseranfall wird reduziert.6. The amount of wastewater is reduced.
11
Grubenwasserzuleiter
Mine water supply
22nd
Abwasserbehandlungsanlage
Wastewater treatment plant
33rd
Absetzbecken
Sedimentation tanks
44th
Kalkstein-Naßmühle
Limestone wet mill
55
Absorptionsmittelbehälter
Absorbent container
66
Gaswäscher
Gas scrubber
77
Grubenwasser
Mine water
88th
Wasserbehandlungsmittel
Water treatment agent
99
Rohwasser
Raw water
1010th
Rotschlamm
Red mud
1111
Deponiegut
Landfill
1212th
Kalksteinschotter
Limestone gravel
1313
Wasser
water
1414
Kalkstein-Rotschlamm-Suspension
Limestone-red mud suspension
1515
Suspension
suspension
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997107339 DE19707339A1 (en) | 1997-02-14 | 1997-02-14 | Treating red sludge from mining operations, by mixing with chalk and water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997107339 DE19707339A1 (en) | 1997-02-14 | 1997-02-14 | Treating red sludge from mining operations, by mixing with chalk and water |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19707339A1 true DE19707339A1 (en) | 1998-08-20 |
Family
ID=7821309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997107339 Ceased DE19707339A1 (en) | 1997-02-14 | 1997-02-14 | Treating red sludge from mining operations, by mixing with chalk and water |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19707339A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008018854A1 (en) | 2008-04-15 | 2009-10-22 | Conny Brachmann | Processing sulfate-containing mine seepage- and mine sewage-water, comprises collecting water in container, conducting sulfate-containing water in reaction container, collecting mine seepage water and neutralizing chloride-containing water |
US20200299207A1 (en) * | 2019-03-22 | 2020-09-24 | Kunming University Of Science And Technology | Method for ammonium-enhanced flue gas desulfurization by using red mud slurry |
CN113398749A (en) * | 2021-05-14 | 2021-09-17 | 国能宿州热电有限公司 | Feeding process of calcium-containing sludge recycling system of water purification system of coal-fired power plant |
-
1997
- 1997-02-14 DE DE1997107339 patent/DE19707339A1/en not_active Ceased
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008018854A1 (en) | 2008-04-15 | 2009-10-22 | Conny Brachmann | Processing sulfate-containing mine seepage- and mine sewage-water, comprises collecting water in container, conducting sulfate-containing water in reaction container, collecting mine seepage water and neutralizing chloride-containing water |
US20200299207A1 (en) * | 2019-03-22 | 2020-09-24 | Kunming University Of Science And Technology | Method for ammonium-enhanced flue gas desulfurization by using red mud slurry |
US11535572B2 (en) * | 2019-03-22 | 2022-12-27 | Kunming University Of Science And Technology | Method for ammonium-enhanced flue gas desulfurization by using red mud slurry |
CN113398749A (en) * | 2021-05-14 | 2021-09-17 | 国能宿州热电有限公司 | Feeding process of calcium-containing sludge recycling system of water purification system of coal-fired power plant |
CN113398749B (en) * | 2021-05-14 | 2024-05-31 | 国能宿州热电有限公司 | Throwing process of calcium-containing sludge recycling system of water quality purification system of coal-fired power plant |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8127 | New person/name/address of the applicant |
Owner name: VATTENFALL EUROPE GENERATION AG & CO. KG, 10115 BE |
|
8110 | Request for examination paragraph 44 | ||
8127 | New person/name/address of the applicant |
Owner name: VATTENFALL EUROPE GENERATION AG & CO. KG, 03050 CO |
|
8131 | Rejection |