DE375479C - Process for regenerating the milk of lime used in the absorption of hydrogen sulfide - Google Patents
Process for regenerating the milk of lime used in the absorption of hydrogen sulfideInfo
- Publication number
- DE375479C DE375479C DET22785D DET0022785D DE375479C DE 375479 C DE375479 C DE 375479C DE T22785 D DET22785 D DE T22785D DE T0022785 D DET0022785 D DE T0022785D DE 375479 C DE375479 C DE 375479C
- Authority
- DE
- Germany
- Prior art keywords
- milk
- hydrogen sulfide
- absorption
- regenerating
- lime
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
- C10K1/122—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing only carbonates, bicarbonates, hydroxides or oxides of alkali-metals (including Mg)
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Description
Verfahren zum Regenerieren der bei der Absorption von Schwefelwasserstoff verwendeten Kalkmilch. Als Verunreinigungen von Gasen, z. B. Generatorgas, Leuchtgas usw., treten unter anderem auch Schwefelverbindungen wie schweflige Säure(SO2) und Schwefelwasserstoff (H2S) auf, die entweder aus die Kohle verunreinigenden Mengen Eisensulfid oder meistens aus organisch in der Kohle gebundenem Schwefel herrühren.Process for the regeneration of the absorption of hydrogen sulfide used milk of lime. As impurities in gases, e.g. B. generator gas, coal gas etc., also occur among other things also sulfur compounds such as sulfurous acid (SO2) and Hydrogen sulfide (H2S), either from the coal polluting quantities Iron sulfide or mostly from organically bound sulfur in the coal.
Die Erfindung betrifft ein Verfahren zur Entfernung des Schwefelwasserstoffes aus derartigen Gasen und Dämpfen. Den Schwefelwasserstoff hieraus wegzuschaffen, gibt es bisher verschiedene Möglichkeiten; die beiden billigsten sind Raseneisenerz und Kalkmilch. Bei Verwendung von Raseneisenerz, wie solches allgemein bei der Leuchtgasbereitung angewendet wird, sind jedoch große, platz--raubende Kasten erforderlich, durch welche das Gas von einem Gassauger hindurchgesaugt werden muß. Das Entleeren der Kasten, Umschaufeln des Raseneisenerzes zwecks Regeneration und Wiedereinfüllen der Kasten ist infolge der aufgewendeten Arbeitsleistung ziemlich kostspielig. Bei Verwendung von Kalkmilch ergibt sich Kalziumsulfhydrat nach der Formel: Ca (0H)2 -;- 2 H,S - Ca (S H)2 +2H20. Sobald aber die Bildung des Kalziumsulfhydrats etwa 7 Prozent erreicht hat, tritt Hydrolyse ein, d. h. die äußerst schwache Säure des Schwefelwasserstoffes wird von der Kalkmilch nicht ' mehr genügend gebunden, der Schwefelwasserstoff wird nicht mehr absorbiert, was sich durch üblen Geruch bemerkbar macht. Die Verwendung von Kalkmilch hat also den Nachteil, daß sie nur eine gewisse Zeit aufnahmefähig ist. Ferner hat man auch schon Alkalien zur Entfernung des Schwefelwasserstoffs vorgeschlagen. -Um ihre Nachteile zu beseitigen, wurde in der Alkalilösung Eisenhydroxyd aufgeschlämmt, zum Zwecke, das Alkali aus den gebildeten Alkalisulfiden während de's Reinigungsprozesses selbsttätig zu regenerieren, wobei sich Schwefeleisen und freies Alkali ergibt. Hierbei mußte aber die Alkalilösung von den gebildeten Eisenschwefelverbindungen durch Filtration getrennt und erneut mit frischem Eisenhydroxyd auf den Wascher aufgegeben werden.The invention relates to a method for removing hydrogen sulfide from such gases and vapors. To get rid of the hydrogen sulphide there are different options so far; the two cheapest are lawn iron ore and milk of lime. When using lawn iron ore, as is generally the case with the preparation of luminous gas is used, however, large, space-consuming boxes are required through which the gas must be sucked through by a gas suction device. Emptying the boxes, Shoveling the lawn iron ore for regeneration and refilling the boxes is quite costly due to the amount of work involved. Using calcium sulfhydrate from milk of lime results from the formula: Ca (0H) 2 -; - 2 H, S - Ca (S H) 2 + 2H20. But as soon as the formation of calcium sulfhydrate is about 7 percent hydrolysis occurs, i. H. the extremely weak acid of hydrogen sulfide If the milk of lime is no longer sufficiently bound, the hydrogen sulphide becomes no longer absorbed, which is noticeable by a foul odor. The usage milk of lime has the disadvantage that it can only absorb it for a certain period of time is. Furthermore, one already has alkalis for removing the hydrogen sulphide suggested. - To eliminate its disadvantages, iron hydroxide was added to the alkali solution slurried, for the purpose, the alkali from the alkali sulfides formed during de's cleaning process to regenerate automatically, whereby iron sulphide and gives free alkali. In this case, however, the alkali solution had to remove the iron-sulfur compounds formed separated by filtration and again with fresh iron hydroxide on the washer to be abandoned.
Nach dem Verfahren der Erfindung nun, bei welchem Kalkmilch zur Absorption von Schwefelwasserstoff verwendet wird, kann man diese praktisch unbeschränkte Zeit und ohne Filtration im Wascher kreisen lassen, und zwar dadurch, daß man in das Sammelbecken der den Wascher verlassenden, Schwefelwasserstoff enthaltenden Kalkmilch Raseneisenstein in gelochten Körben zwischen Doppelböden o. dgl. einbringt, das sich bildende Eisensulfid regeneriert dann beständig die Kalkmilch. Enthalten die Gase außer Schwefelwasserstoff auch Kohlensäure, so wird diese bei Anwendung des neuen Verfahrens gleichzeitig mit absorbiert. Ein weiterer Vorteil ist, daß bei Gasen, welche außer den genannten Verunreinigungen noch Flugstaub enthalten, derselbe bei Anwendung des Verfahrens auch mit ausgewaschen wird.According to the method of the invention now, in which milk of lime for absorption If hydrogen sulfide is used, this can be practically unlimited and let it circulate in the washer without filtration, namely by pouring into the Collecting basin for the lime milk leaving the washer and containing hydrogen sulphide Lawn iron stone in perforated baskets between raised floors or the like The iron sulfide that forms then constantly regenerates the milk of lime. Include the Gases not only hydrogen sulfide but also carbonic acid, this becomes when the new procedure at the same time with absorbed. Another advantage is that with Gases which, in addition to the pollutants mentioned, also contain fly ash, same is also washed out when using the method.
e laschene tabs
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET22785D DE375479C (en) | 1919-05-20 | 1919-05-20 | Process for regenerating the milk of lime used in the absorption of hydrogen sulfide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET22785D DE375479C (en) | 1919-05-20 | 1919-05-20 | Process for regenerating the milk of lime used in the absorption of hydrogen sulfide |
Publications (1)
Publication Number | Publication Date |
---|---|
DE375479C true DE375479C (en) | 1923-05-14 |
Family
ID=7550702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET22785D Expired DE375479C (en) | 1919-05-20 | 1919-05-20 | Process for regenerating the milk of lime used in the absorption of hydrogen sulfide |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE375479C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1054648B (en) * | 1956-10-24 | 1959-04-09 | Pintsch Bamag Ag | Process for regenerating alkaline washing solutions |
-
1919
- 1919-05-20 DE DET22785D patent/DE375479C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1054648B (en) * | 1956-10-24 | 1959-04-09 | Pintsch Bamag Ag | Process for regenerating alkaline washing solutions |
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