EP0129680B1 - Verfahren zur Behandlung von Prozessabwässern und Abwässern bei der Hydrierung von Kohle - Google Patents

Verfahren zur Behandlung von Prozessabwässern und Abwässern bei der Hydrierung von Kohle Download PDF

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Publication number
EP0129680B1
EP0129680B1 EP84105177A EP84105177A EP0129680B1 EP 0129680 B1 EP0129680 B1 EP 0129680B1 EP 84105177 A EP84105177 A EP 84105177A EP 84105177 A EP84105177 A EP 84105177A EP 0129680 B1 EP0129680 B1 EP 0129680B1
Authority
EP
European Patent Office
Prior art keywords
coal
waste waters
water
hydrogenation
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.)
Expired
Application number
EP84105177A
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German (de)
English (en)
French (fr)
Other versions
EP0129680A2 (de
EP0129680A3 (en
Inventor
Eckard Dr.-Ing. Wolowski
Hans-Friedrich Dipl.-Ing. Tamm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RAG AG
Original Assignee
Ruhrkohle AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ruhrkohle AG filed Critical Ruhrkohle AG
Publication of EP0129680A2 publication Critical patent/EP0129680A2/de
Publication of EP0129680A3 publication Critical patent/EP0129680A3/de
Application granted granted Critical
Publication of EP0129680B1 publication Critical patent/EP0129680B1/de
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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
    • 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 in the hydrogenation in tar acids, i.e. H. 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 CARBON 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 environmental protection reasons because of the tar acid content and the hydrogen sulfide and ammonia still contained in them.
  • 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 wastewater cleaned in this way can be discharged with a remaining permissible residual phenol content.
  • An older proposal (DE-30 36 259 A 1) provides for the use of the waters containing tar acid to be used in a Texaco gasification plant connected to the hydrogenation plant to solve the sewage problems.
  • the Texaco plant is used to generate hydrogen from vacuum residues or coal, the vacuum residues or the coal being introduced into the reactor in a water suspension.
  • the suspension is created from the tar-containing water.
  • the resulting disposal option does not require any intermediate cleaning stages for the water.
  • 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 associated with an increase in the amount of coal oil used by reducing the amount of tar acid that passes into the aqueous phase 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 recycled cycle 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 water generated in the hydrogenation is composed of the residual moisture of the coal, the injection and formation water.
  • the amount of injection water is 34.8 t / day, i. H. the wastewater from the distillations 30.4 t / day 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 / day, only 45.7 t / day are incurred.

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)
  • Industrial Gases (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP84105177A 1983-06-24 1984-05-08 Verfahren zur Behandlung von Prozessabwässern und Abwässern bei der Hydrierung von Kohle Expired EP0129680B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3322784 1983-06-24
DE19833322784 DE3322784A1 (de) 1983-06-24 1983-06-24 Verfahren zur behandlung von prozessabwaessern und abwaessern bei der hydrierung von kohle

Publications (3)

Publication Number Publication Date
EP0129680A2 EP0129680A2 (de) 1985-01-02
EP0129680A3 EP0129680A3 (en) 1987-05-06
EP0129680B1 true EP0129680B1 (de) 1988-08-17

Family

ID=6202299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105177A Expired EP0129680B1 (de) 1983-06-24 1984-05-08 Verfahren zur Behandlung von Prozessabwässern und Abwässern bei der Hydrierung von Kohle

Country Status (9)

Country Link
US (1) US4597851A (enrdf_load_stackoverflow)
EP (1) EP0129680B1 (enrdf_load_stackoverflow)
JP (1) JPS6013886A (enrdf_load_stackoverflow)
AU (1) AU557994B2 (enrdf_load_stackoverflow)
BR (1) BR8403056A (enrdf_load_stackoverflow)
CA (1) CA1231655A (enrdf_load_stackoverflow)
DE (2) DE3322784A1 (enrdf_load_stackoverflow)
PL (1) PL146219B1 (enrdf_load_stackoverflow)
ZA (1) ZA844751B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
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
US1990708A (en) * 1930-08-22 1935-02-12 Standard Ig Co Production of valuable hydrocarbons
GB522037A (en) * 1938-12-03 1940-06-06 Int Hydrogeneeringsoctrooien Improvements in the destructive hydrogenation of carbonaceous materials and in dephenolising waste water
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

Also Published As

Publication number Publication date
AU557994B2 (en) 1987-01-15
DE3473472D1 (en) 1988-09-22
EP0129680A2 (de) 1985-01-02
AU2970384A (en) 1985-01-31
PL146219B1 (en) 1989-01-31
JPH037237B2 (enrdf_load_stackoverflow) 1991-02-01
BR8403056A (pt) 1985-05-28
JPS6013886A (ja) 1985-01-24
EP0129680A3 (en) 1987-05-06
DE3322784A1 (de) 1985-01-03
ZA844751B (en) 1985-05-29
PL248360A1 (en) 1985-04-24
US4597851A (en) 1986-07-01
CA1231655A (en) 1988-01-19

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