DE1101379B - Process for removing solid ammonium salts from coking waste water - Google Patents
Process for removing solid ammonium salts from coking waste waterInfo
- Publication number
- DE1101379B DE1101379B DEB53146A DEB0053146A DE1101379B DE 1101379 B DE1101379 B DE 1101379B DE B53146 A DEB53146 A DE B53146A DE B0053146 A DEB0053146 A DE B0053146A DE 1101379 B DE1101379 B DE 1101379B
- Authority
- DE
- Germany
- Prior art keywords
- waste water
- ammonium salts
- removing solid
- solid ammonium
- salts
- 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.)
- Pending
Links
- 239000002351 wastewater Substances 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 13
- 150000003863 ammonium salts Chemical class 0.000 title claims description 5
- 239000007787 solid Substances 0.000 title claims description 3
- 238000004939 coking Methods 0.000 title description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 150000003868 ammonium compounds Chemical class 0.000 claims description 3
- 159000000011 group IA salts Chemical class 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000000571 coke Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 206010000210 abortion Diseases 0.000 description 3
- 231100000176 abortion Toxicity 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- AQGDXJQRVOCUQX-UHFFFAOYSA-N N.[S] Chemical compound N.[S] AQGDXJQRVOCUQX-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 125000005605 benzo group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/10—Separation of ammonia from ammonia liquors, e.g. gas liquors
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Physical Water Treatments (AREA)
Description
Verfahren zum Entfernen fixer Ammoniumsalze aus Kokereiabwässern Die Ablaufwässer der Ammoniak-Schwefelwäscher im Kokereibetrieb enthalten fixe Ammoniumsalze, die durch einfaches Erhitzen der Abwässer nicht abgetrieben werden können. Da dieses Salze enthaltende Wasser zum Kokslöschen unbrauchbar und auch seine Ableitung in Abwasserläufe unerwünscht ist, werden die fixen Amnioniumsalze durch Kalkabtrieb aus den Ablaufwässern entfernt. Dieses Verfahren hat, al>-äesehen davon, daß zur Beroitstellung dies Kalkes und zur Bedienung der Anlagen ein erheblicher Aufwand an Arbeitskraft erforderlich ist, den Nachteil, daß die anfallenden Abwässer Calciumsulfat und Ca1Gi.umcarbonat enthalten und die Abwässer, ehe sie zum Kokslöschen verwendet oder in Abwasserläufe geleitet werden können, durch Klärung von den unlöslichen Salzen befreit werden müssen. Auch treten beim Abtreiben der Ammoniumverbindungen aus den mit is,alk versetzten Abwässern Verkrustungen der beim Abtreiben verwendeten Apparaturen durch Ablagerung von Kalk auf, die es erforderlich machen, die Apparate in mehr oder weniger kurzen Zeitabständen außer Betrieb zu setzen und von den Verkrustungen zu befreien.Process for removing fixed ammonium salts from coking plant wastewater The effluent water from the ammonia sulfur scrubber in the coking plant contains fixed ammonium salts, which cannot be driven off by simply heating the waste water. Since this Water containing salts is unusable for quenching coke and also its derivation in If waste water runs are undesirable, the fixed amnionium salts are removed by limescale removed from the drainage waters. This procedure has, as seen from the fact that for Obtaining this lime and operating the systems is a considerable effort in labor is required, the disadvantage that the resulting waste water is calcium sulfate and Ca1Gi.umcarbonat and the waste water before it is used for coke extinguishing or can be discharged into sewers, by clarifying the insoluble ones Salts need to be freed. Also occur when driving off the ammonium compounds from the sewage mixed with is, alk, encrustations of the used for abortion Apparatus due to the build-up of lime, which make it necessary to use the apparatus put out of operation in more or less short time intervals and from the incrustations to free.
Es ist bereits vorgeschlagen worden, diese Verkrustungen dadurch zu vermeiden, daß den Abwässern zum Abtreiben der Ammoniumverbindungen an Stelle des Kalkes organische Basen, insbesondere Pyridin, zugesetzt werden, jedoch konnte sich dieses Verfahren, insbebondere wegen der hohen Kosten der zur Verwendung beim Abtreiben vorgeschlagenen Alkalien, in der Praxis in größerem Umfange nicht durchsetzen.It has already been suggested to prevent these incrustations avoid that the wastewater to drive off the ammonium compounds in place of the Lime organic bases, especially pyridine, could be added, however this method, particularly because of the high cost of using it in abortion proposed alkalis do not prevail in practice to a large extent.
Diese Nachteile werden bei dem Verfahren gemäß der Erfindung vermieden. Das in den Ablaufwässern enthaltene fixe Ammoniak wird weitgehend gewonnen und das behandelte Ablaufwasser ist frei von N'erbindungen, die bei seiner Verwendung zum Kokslöschen oder beim Ableiten in Abwasserläufe schädlich sein könnten. Überdies findet bei dem Verfahren gemäß der Erfindung eine Anreicherung der abgetriebenen Schwaden mit flüchtigen Schwefelverbindungen statt, so daß sich bei ihrer Verarbeitung auf Schwefelsäure eine besonders lohnende Konzentration ergibt, wodurch die Wirtschaftlichkeit des Verfahrens gemäß der Erfindung die der bekannten Verfahren wesentlich übersteigt.These disadvantages are avoided in the method according to the invention. The fixed ammonia contained in the runoff water is largely recovered and the treated runoff water is free of N'erbindungen, which could be harmful when used to quench coke or when discharged into sewers. In addition, in the method according to the invention, the expelled plumes are enriched with volatile sulfur compounds, so that when they are processed on sulfuric acid, a particularly worthwhile concentration results, whereby the economic efficiency of the method according to the invention significantly exceeds that of the known methods.
Gegenstand der Erfindung ist ein Verfahren zum Entfernen fixer Ammoniumsalze aus Kokereiabwässern durch Behandeln mit alkalischen Salzen und Abtreiben der entstandenen flüchtigen Ammon.i.umv erbindungen durch Erhitzen, bei dem den Abwässern alkalische Salze flüchtiger Säuren des Schwefels zugegeben werden.The invention relates to a method for removing solid ammonium salts from coking plant wastewater by treating with alkaline salts and driving off the resulting volatile ammonia compounds due to heating, which makes the waste water alkaline Volatile acid salts of sulfur are added.
Von besonderem Vorteil ist es, den Abwässern Sulfidablaugen zuzusetzen. Zur Ausführung des Verfahrens sind besonders betrieblich anfallende, natriumsulfid- und natriumbisulfidhaltige Ablaugen aus der Erdöl- und BenzoIraffination geeignet, ebenso die Entschweflerlaugen aus Entphenolungsanlagen, deren Beseitigung, da sie in Abwasserläufe nicht eingeleitet werden dürfen, ohnehin Schwierigkeiten bereitet.It is particularly advantageous to add sulphide waste liquors to the waste water. In order to carry out the process, sodium sulphide that occurs particularly during the operation and sodium bisulphide-containing waste liquors from petroleum and benzo refining are suitable, likewise the desulphurizer liquors from dephenol plants, their disposal, since they are not allowed to be discharged into sewers, causes difficulties anyway.
Beim Zusatz derartiger Laugen zu den Ammoniurnchlorid und Ammoniumsulfat enthaltenden Ablaufwässern bilden sich Ammoniak und Schwefelwasserstoff, die durch Erhitzen der Ablaufwässer abgetrieben werden, sowie NTatriumchlorid und Natriumsulfat. ciie mit den Abwässern, ohne störend zu wirken, abgehen. Eventuell in den Sulfidablaugen enthaltenes Phenol geht ebenfalls in das Abwasser und wir-1, wenn dieses zum Kokslöschen verwendet wird, hierbei zerstört. Das aus den Ablaufwässern abgetriebene Ammoniak und der Schwefelwasserstoff werden in an sich bekannter Weise auf Ammoniumstilfat un,i Schwefelsäure verarbeitet. Hierbei tritt insbesondere der Vorteil auf, daß der Schwefelwasserstoffgehalt der Abtreiberdämpfe durch die vor dem Abtrieb zugesetzten Sulfide so weit erhöht wird, daß sich eine für die Schwefelsäure:herstellung besonders lohnende Konzentration ergibt. Außerdem fällt durch die Mehrproduktion an Schwefelsäure eine zusätzliche Dampfmenge an, die :den Bedarf zum Erhitzen der zugesetzten Sulfidablauge im Abtreiber deckt.When adding such alkalis to the ammonium chloride and ammonium sulfate containing runoff water forms ammonia and hydrogen sulfide, which through Heating the runoff waters are driven off, as well as N sodium chloride and sodium sulfate. ciie go off with the sewage without being disruptive. Possibly in the sulphide waste liquor contained phenol also goes into the wastewater and we-1, if this for coke extinguishing is used, destroyed here. The ammonia expelled from the runoff water and the hydrogen sulfide are converted to ammonium stilfate in a manner known per se un, i processed sulfuric acid. This has the particular advantage that the hydrogen sulphide content of the stripping vapors due to those added before the stripping Sulphide is increased so far that one is particularly useful for the production of sulfuric acid results in worthwhile concentration. In addition, the excess production of sulfuric acid decreases an additional amount of steam that: the need to heat the added sulphide waste liquor in abortion covers.
Das Verfahren gemäß der Erfindung hat, abgesehen davon, daß das in den Ablaufwässern der Ammoniak-Schwefelwäscher enthaltene fixe Ammoniak weitgehend gewonnen wird und die Abliaufwässer als Brauchwasser nutzbar gemacht werden, noch den Vorteil, daß die als unerwünscht anfallenden Sulfi.dablaugen nutzbare Verwendung finden. Diese Laugen mußten bisher, .da .ihre Ableitun- in Abwasserläufe unzulässig ist, auf kostspielige Weise vernichtet werden.The method according to the invention, apart from the fact that the in the discharge water from the ammonia sulfur scrubber largely contains fixed ammonia is obtained and the sewage water can still be used as service water the advantage, that the sulfi.dablaugen produced as undesirable find usable use. Until now, these alkalis had to be discharged into sewers is impermissible, be destroyed in a costly manner.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB53146A DE1101379B (en) | 1959-05-06 | 1959-05-06 | Process for removing solid ammonium salts from coking waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB53146A DE1101379B (en) | 1959-05-06 | 1959-05-06 | Process for removing solid ammonium salts from coking waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1101379B true DE1101379B (en) | 1961-03-09 |
Family
ID=6970176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB53146A Pending DE1101379B (en) | 1959-05-06 | 1959-05-06 | Process for removing solid ammonium salts from coking waste water |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1101379B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1216857B (en) | 1963-11-15 | 1966-05-18 | Emschergenossenschaft | Process for processing ammonia and phenol-containing waters in coking plants |
-
1959
- 1959-05-06 DE DEB53146A patent/DE1101379B/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1216857B (en) | 1963-11-15 | 1966-05-18 | Emschergenossenschaft | Process for processing ammonia and phenol-containing waters in coking plants |
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