EP0129680A2 - Traitement d'eaux résiduaires de procédé et d'eau résiduaire provenant d'une hydrogénation de charbon - Google Patents
Traitement d'eaux résiduaires de procédé et d'eau résiduaire provenant d'une hydrogénation de charbon Download PDFInfo
- Publication number
- EP0129680A2 EP0129680A2 EP84105177A EP84105177A EP0129680A2 EP 0129680 A2 EP0129680 A2 EP 0129680A2 EP 84105177 A EP84105177 A EP 84105177A EP 84105177 A EP84105177 A EP 84105177A EP 0129680 A2 EP0129680 A2 EP 0129680A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- coal
- hydrogenation
- waste waters
- treatment
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/06—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal by destructive hydrogenation
Definitions
- the invention relates to a process for the treatment of process water and waste water in the hydrogenation of coal.
- Coal hydrogenation is usually understood to mean the addition of molecular hydrogen to coal under pressure and under cracking conditions, with catalysts generally being present.
- Oxygen contained in the coal is partly converted into tar acids, i.e. Phenols, cresols and xylenols converted. Another proportion of oxygen leads to the formation of water of reaction.
- the hydrogenation is followed by separators in which the hydrogenation products are separated.
- the so-called cold separator separates the COAL OIL and the aqueous phase.
- Quench water is injected to prevent blockages due to salt formation in the pipes upstream of the cold separator. Together with the water of reaction in the cold separator, this forms the aforementioned aqueous phase.
- the tar acids are very water-soluble products. Some of them go into the reaction and quench water.
- the listed wastewater cannot be released into public waters due to the tar acid content and the hydrogen sulfide and ammonia still contained in them for environmental reasons.
- the state of the art is to feed them to a phenol recovery system with a downstream wastewater treatment after separation of hydrogen sulfide and ammonia.
- the waste water purified in this way can then be discharged with a remaining permissible residual phenol content.
- An older proposal (DE - 30 36 259 A 1 provides for the solution of the wastewater problems to use the waters containing tar acid in a Texaco gasification plant connected to the hydrogenation plant.
- the Texaco plant serves for the production of hydrogen from vacuum residue or coal, whereby The vacuum residue or the coal in a water suspension is introduced into the reactor.
- the suspension arises from the waters containing tar acid.
- the disposal possibility thus provided does not require any intermediate cleaning stages for the waters.
- the invention is therefore based on the object of simplifying the treatment of the process water and waste water in such cases. According to the invention this is achieved in that the tar-containing wastewater from atmospheric distillation and / or vacuum distillation is used as quench water and thus to reduce the necessary amount of demineralized water to be supplied. At the same time, the total amount of waste water from the hydrogenation system is reduced by the amount returned. This is ultimately linked to an increase in the amount of coal oil used by reducing the amount that passes into the aqueous phase Amount of tar acid as a result of the initial concentration of tar acid already contained in the return water.
- Dried coal is mashed with solvent in a slurry 1 and hydrogenated in a reactor 2 with the addition of hydrogen.
- the reaction products are separated in a hot separator downstream of the hydrogenation reactor 1.
- gases and vapors are drawn off overhead; a liquid phase, which contains the solids, is removed from the sump into the vacuum distillation 4.
- the top product of the hot separator 3 is passed to a downstream cold separator 5.
- the liquid phase is water, which is partly formed from the oxygen chemically bound in the coal and partly consists of injection water (quench water). This quench water is injected into the vapor phase behind the hot separator 3 in order to avoid blockages caused by crystallizing ammonium salts.
- the water contains part of the tar acids (phenols, cresols, xylenols), which are also formed in the hydrogenation from the oxygen contained in the coal.
- tar acids phenols, cresols, xylenols
- coal oil obtained is distilled atmospherically with addition of stripping steam in an atmospheric distillation 6.
- the water phase resulting from the cooling of the top product in turn contains tar acids.
- Light and medium oil of atm. Distillation 6 are subjected to a hydrogenating stabilization 7.
- the outgoing gas phase of the cold separator 5 is divided into recirculating and discharge gas after an oil wash carried out under process pressure.
- the discharge gas is cleaned in a gas scrubber 8 and broken down into hydrogen, heating gas, SNG and LPG in a low-temperature separation plant 9.
- the solid-containing residue of the hot separator 3 is topped in the vacuum distillation 4.
- the resulting heavy oil is extracted from the atm together with heavy and medium oil. Distillation as solvent in the mash 1.
- Steam jets are used to generate vacuum.
- the condensate of the propellant steam used contains tar components.
- the following wastewater quantities and concentrations were measured in a coal liquefaction plant for the hydrogenation of a gas flame coal extracted in the Ruhr area with a throughput of 152 t (waf) coal / d, corresponding to an hourly output of approx. 6.3 t / h:
- the water generated in the hydrogenation is composed of the residual moisture of the coal, the injection and formation water.
- the injection water volume is 34.8 t / d, ie the wastewater from the distillations 30.4 t / d can cover this water requirement approximately.
- the amount of waste water containing tar acid is advantageously reduced by this value. Instead of 76.1 t / d, there are only 45.7 t / d.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Industrial Gases (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833322784 DE3322784A1 (de) | 1983-06-24 | 1983-06-24 | Verfahren zur behandlung von prozessabwaessern und abwaessern bei der hydrierung von kohle |
DE3322784 | 1983-06-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0129680A2 true EP0129680A2 (fr) | 1985-01-02 |
EP0129680A3 EP0129680A3 (en) | 1987-05-06 |
EP0129680B1 EP0129680B1 (fr) | 1988-08-17 |
Family
ID=6202299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84105177A Expired EP0129680B1 (fr) | 1983-06-24 | 1984-05-08 | Traitement d'eaux résiduaires de procédé et d'eau résiduaire provenant d'une hydrogénation de charbon |
Country Status (9)
Country | Link |
---|---|
US (1) | US4597851A (fr) |
EP (1) | EP0129680B1 (fr) |
JP (1) | JPS6013886A (fr) |
AU (1) | AU557994B2 (fr) |
BR (1) | BR8403056A (fr) |
CA (1) | CA1231655A (fr) |
DE (2) | DE3322784A1 (fr) |
PL (1) | PL146219B1 (fr) |
ZA (1) | ZA844751B (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6437303A (en) * | 1987-08-03 | 1989-02-08 | Komatsu Mfg Co Ltd | Liquid gnawing seal type continuous liquid/viscous object packaging method and equipment |
JPH01153410A (ja) * | 1987-12-10 | 1989-06-15 | Komatsu Ltd | 液かみシール型連続液体・粘体包装装置 |
US6533945B2 (en) | 2000-04-28 | 2003-03-18 | Texaco Inc. | Fischer-Tropsch wastewater utilization |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB522037A (en) * | 1938-12-03 | 1940-06-06 | Int Hydrogeneeringsoctrooien | Improvements in the destructive hydrogenation of carbonaceous materials and in dephenolising waste water |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1996009A (en) * | 1925-02-14 | 1935-03-26 | Standard Ig Co | Conversion of solid fuels and products derived therefrom or other materials into valuable liquids |
US1983234A (en) * | 1925-02-14 | 1934-12-04 | Standard Ig Co | Conversion of solid fuels and product derived therefrom or o'ther materials into valuable liquids |
US1994075A (en) * | 1925-02-14 | 1935-03-12 | Standard Ig Co | Conversion of solid fuels and products derived therefrom or other materials into valuable liquids |
US1931550A (en) * | 1925-02-14 | 1933-10-24 | Standard Ig Co | Conversion of solid fuels and products derived therefrom or other materials into valuable liquids |
US1990708A (en) * | 1930-08-22 | 1935-02-12 | Standard Ig Co | Production of valuable hydrocarbons |
US3503866A (en) * | 1968-04-24 | 1970-03-31 | Atlantic Richfield Co | Process and system for producing synthetic crude from coal |
US3909390A (en) * | 1972-09-15 | 1975-09-30 | Universal Oil Prod Co | Coal liquefaction process |
US3926775A (en) * | 1973-11-01 | 1975-12-16 | Wilburn C Schroeder | Hydrogenation of coal |
US3944480A (en) * | 1974-03-29 | 1976-03-16 | Schroeder Wilburn C | Production of oil and high Btu gas from coal |
US3954596A (en) * | 1974-06-03 | 1976-05-04 | Schroeder Wilburn C | Production of low sulfur heavy oil from coal |
US4260471A (en) * | 1979-07-05 | 1981-04-07 | Union Oil Company Of California | Process for desulfurizing coal and producing synthetic fuels |
US4350582A (en) * | 1979-10-18 | 1982-09-21 | Chevron Research Company | Two-stage coal liquefaction process with process-derived solvent |
-
1983
- 1983-06-24 DE DE19833322784 patent/DE3322784A1/de not_active Withdrawn
-
1984
- 1984-05-08 EP EP84105177A patent/EP0129680B1/fr not_active Expired
- 1984-05-08 DE DE8484105177T patent/DE3473472D1/de not_active Expired
- 1984-06-21 AU AU29703/84A patent/AU557994B2/en not_active Ceased
- 1984-06-22 CA CA000457191A patent/CA1231655A/fr not_active Expired
- 1984-06-22 PL PL1984248360A patent/PL146219B1/pl unknown
- 1984-06-22 BR BR8403056A patent/BR8403056A/pt not_active IP Right Cessation
- 1984-06-22 ZA ZA844751A patent/ZA844751B/xx unknown
- 1984-06-22 JP JP59127695A patent/JPS6013886A/ja active Granted
- 1984-06-25 US US06/624,105 patent/US4597851A/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB522037A (en) * | 1938-12-03 | 1940-06-06 | Int Hydrogeneeringsoctrooien | Improvements in the destructive hydrogenation of carbonaceous materials and in dephenolising waste water |
Also Published As
Publication number | Publication date |
---|---|
AU557994B2 (en) | 1987-01-15 |
CA1231655A (fr) | 1988-01-19 |
BR8403056A (pt) | 1985-05-28 |
ZA844751B (en) | 1985-05-29 |
JPH037237B2 (fr) | 1991-02-01 |
EP0129680B1 (fr) | 1988-08-17 |
JPS6013886A (ja) | 1985-01-24 |
PL146219B1 (en) | 1989-01-31 |
AU2970384A (en) | 1985-01-31 |
US4597851A (en) | 1986-07-01 |
PL248360A1 (en) | 1985-04-24 |
DE3322784A1 (de) | 1985-01-03 |
EP0129680A3 (en) | 1987-05-06 |
DE3473472D1 (en) | 1988-09-22 |
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