EP1419221B1 - Procede de nettoyage de prerefroidisseurs d'une cokerie - Google Patents

Procede de nettoyage de prerefroidisseurs d'une cokerie Download PDF

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Publication number
EP1419221B1
EP1419221B1 EP02764842A EP02764842A EP1419221B1 EP 1419221 B1 EP1419221 B1 EP 1419221B1 EP 02764842 A EP02764842 A EP 02764842A EP 02764842 A EP02764842 A EP 02764842A EP 1419221 B1 EP1419221 B1 EP 1419221B1
Authority
EP
European Patent Office
Prior art keywords
tar
precoolers
liquid phase
naphthalene
precooler
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 - Lifetime
Application number
EP02764842A
Other languages
German (de)
English (en)
Other versions
EP1419221A2 (fr
Inventor
Frank Rossa
Horst Schröder
Hans-Josef Giertz
Friedrich Wilhelm Cyris
Franz Liesewitz
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.)
Deutsche Montan Technologie GmbH
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Deutsche Montan Technologie GmbH
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Publication date
Application filed by Deutsche Montan Technologie GmbH filed Critical Deutsche Montan Technologie GmbH
Publication of EP1419221A2 publication Critical patent/EP1419221A2/fr
Application granted granted Critical
Publication of EP1419221B1 publication Critical patent/EP1419221B1/fr
Anticipated expiration legal-status Critical
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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
    • C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
    • C10K1/06—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials combined with spraying with water
    • 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
    • C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B43/00—Preventing or removing incrustations
    • C10B43/02—Removing incrustations
    • C10B43/08—Removing incrustations with liquids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B43/00—Preventing or removing incrustations
    • C10B43/14—Preventing incrustations

Definitions

  • the invention relates to a method for flushing pre-cooling of a coking plant according to the preamble of claim 1.
  • the Koksofenrohgas is first cooled in a direct raw gas cooling with the so-called template sprinkling water in a template.
  • the Koksofenrohgas is cooled to a temperature of about 80 ° C and at the same time washed out part of the entrained solids content from the Koksofenrohgas and deposited in the liquid phase, together with the tar and condensate.
  • the remaining solids content which is bound in the form of aerosols to the finest tar and water drops, passes with the Koksofenrohgas in the so-called precooler.
  • the Koksofenrohgas is cooled in an indirect cooling of about 80 ° C to about 20 ° C. During this cooling, most of the naphthalene contained in the raw coke oven gas sublimes.
  • tarry solids-containing ingredients of Koksofenrohgases are deposited on the outer walls of the cooling tubes of the precooler. In connection with the sublimated naphthalene there is the danger that it will come after a relatively short period of operation to blockages of the precooler.
  • the precipitate deposited in the pre-coolers and the naphthalene-containing purge water can not be directly promoted to Teerscheidung with a temperature of about 20 ° C, otherwise there would be emulsion formation and the Teerscheidung would not work. Therefore, the pre-cooling condensates are usually pumped back to the individual Rohgasvorlagen the coke oven batteries with the naphthalene-containing rinse tar and mixed there with the hot auskondens faced from the coke oven condensed liquid phase.
  • Non-prepublished DE 100 51 349 A1 discloses a process for recovering naphthalene from raw coke oven gas, in which the raw coke oven gas is cooled and the naphthalene contained in the coke oven raw gas is directly recovered.
  • the non-prepublished DE 100 07 503 A1 discloses a process for the treatment of raw coke oven gas, in which the Koksofenrohgas is passed after cooling in the template by an electrostatic precipitator and then in the pre-cooler, wherein the flow of the electrostatic precipitator is used for rinsing.
  • DE 26 52 499 A1 discloses a method for cooling the Koksofenrohgases, in which the precooler is divided into two stages, wherein in the first stage no precooling is carried out and in the second stage, a sprinkling of the gas with the circulated run the precooling condensate is made.
  • DE 36 14 851 A1 discloses a method for flushing pre-coolers of a coking plant, in which the pre-coolers are rinsed with the liquid phase obtained from the original. In addition, it is proposed to feed into the Koksofenrohgas the lighter components (BTX aromatics) the Koksofenrohgas so that in the precooler a sufficient amount of solvent for the sublimated naphthalene is present in the precooler.
  • the lighter components BTX aromatics
  • the invention has for its object to provide a method available in which a blockage of the precooler is reliably avoided by Naphthalinablagerache and thus high availability of the precooler is guaranteed and in which also unnecessary additional cleaning process.
  • the method according to the invention is based on the idea of using the liquid phase obtained in the direct raw gas cooling in the crude gas feed, which contains a relatively naphthalene tar, for rinsing the precoolers.
  • the liquid phase of at least one crude gas feedstock is not mixed with the precooling condensates containing the rinse tar enriched with naphthalene and collected in a separate tar separator.
  • This separately collected liquid phase contains the particularly naphthalene tar.
  • the existing tar separator can be used. This has the advantage that no additional tar separator and thus additional investments are required.
  • this naphtha-liquid phase is used for rinsing the radiator tubes in the pre-coolers.
  • the water content of the separately collected liquid phase can be separated according to a development in the separate tar separator.
  • the naphthalene tar can also be mixed with water for use as a rinse tar.
  • the tar or the liquid phase can be freed from the solids in a tar centrifuge. This procedure ensures that no solids pass through the tar or the liquid phase into the precooler.
  • the naphthalene of the crude coke oven gas sublimates on cooling from about 80 ° C to about 20 ° C and is deposited on the cooling tubes of the precooler from. It is now possible to prevent clogging of the precooler by continuously purging it with the liquid phase obtained from at least one raw gas receiver which is not charged with precooling condensates with the naphthalene tar.
  • Rinsing with the naphthalene tar can in principle be carried out with all suitable nozzles, preferably in the upper region of the precooler. Since the tar is low in naphthalene, the task of tar in the precooler at only one point is sufficient for the success of the dishwashing process.
  • the rinsing should take place in three levels, above, in the middle and below. This ensures in any case that deposits on the radiator pipes do not arise.
  • the rinsing in the pre-cooler with a per se known baffle nozzle (DE-PS 197 48 693).
  • the baffle ring nozzles ensure optimum distribution of the naphthalene tar on the tubes and the inner walls of the precoolers.
  • the tarry and aqueous condensates running off at the bottom of the pre-coolers are conveyed, as usual, back to the still remaining raw gas templates, where they are processed together with the liquid phase obtained in the direct raw-gas cooling.
  • a continuous pre-cooling operation can be maintained since deposits on the radiator tubes do not arise and the additional cleaning operations are no longer necessary. It also becomes the emissions that occur during the additional cleaning processes (cleaning with steam) avoided. Rinsing with naphthalene tar significantly increases the availability of pre-cooling. The investment costs are reduced because fewer precoolers must be provided. Since the cleaning processes can be omitted, also reduce the staff and material costs.
  • Continuous pre-cooling operation ensures compliance with constant low coke oven raw gas temperatures at the pre-cooler outlet. It improves the coke oven gas quality, as the hydrogen sulfide, Anmioniak- and Benzolauswaschung can be made more effective at a constant low temperature. When benzene production no corrosion occur because the hydrogen sulphide and ammonia-containing condensates are avoided.
  • the treatment of Koksofenrohgases is shown schematically.
  • the Koksofenrohgas coming from the coke ovens 1 is cooled in templates 2 and 2a with the help of irrigation water 14 directly to about 80 ° C and passed into the precooler 3.
  • the raw coke oven gas is conveyed into a coke oven gas purification 4 before it reaches a consumer 5.
  • the effluent from the precoolers 3 condensates with the naphthalene-rich purge water are conveyed via a line 13 to the template 2, where there is a Erissennung and mixing with the costs incurred in the direct Rohgaslcühlung tar.
  • This liquid phase from the receiver 2 is passed via a line 9 in a tar separator 6 for separating the tar from the carbon water. Via a line 7, the carbonic water is conveyed for further processing.
  • the separated naphthalene-rich tar is transported via a line 8 for loading.
  • the liquid phase from the receiver 2a is passed via a line 10 into a separate tar separator 11 and separated into carbon water and naphthalene tar.
  • the naphthalene tar is conveyed via a line 12 to the precoolers 3 and used there for purging the cooling tubes.

Claims (6)

  1. Procédé pour le nettoyage de condenseurs primaires d'une cokerie, dans lequel les condenseurs primaires sont nettoyés avec la phase liquide récupérée du collecteur de gaz, caractérisé en ce qu'on utilise une phase liquide pour le nettoyage des condenseurs primaires qui provient d'au moins un collecteur de gaz qui n'a pas été sollicité avec des condensats de condenseurs primaires.
  2. Procédé selon la revendication 1, caractérisé en ce que la phase liquide provenant d'au moins un collecteur de gaz qui n'a pas été sollicité avec des condensats de condenseurs primaires est guidée dans un dégoudronneur à chocs séparé et le goudron pauvre en naphtalène récupéré dans le dégoudronneur à chocs est utilisé pour le nettoyage dans les condenseurs primaires.
  3. Procédé selon les revendications 1 et 2, caractérisé en ce que le goudron pauvre en naphtalène récupéré dans le dégoudronneur à chocs séparé ou la phase liquide est guidé dans une centrifugeuse de goudron pour la précipitation des substances solides avant d'être utilisé pour le nettoyage dans les condenseurs primaires.
  4. Procédé selon les revendications 1 à 3, caractérisé en ce que le nettoyage dans les condenseurs primaires a lieu à l'aide de buses à anneaux de percussion.
  5. Procédé selon les revendications 1 à 4, caractérisé en ce que le nettoyage a lieu dans les condenseurs primaires à un seul endroit de charge.
  6. Procédé selon les revendications 1 à 5, caractérisé en ce qu'on procède au nettoyage dans les condenseurs primaires en haut, au milieu et en bas.
EP02764842A 2001-08-15 2002-08-10 Procede de nettoyage de prerefroidisseurs d'une cokerie Expired - Lifetime EP1419221B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10139172A DE10139172C1 (de) 2001-08-15 2001-08-15 Verfahren zur Spülung von Vorkühlern einer Kokerei
DE10139172 2001-08-15
PCT/EP2002/008978 WO2003016437A2 (fr) 2001-08-15 2002-08-10 Procede de nettoyage de prerefroidisseurs d'une cokerie

Publications (2)

Publication Number Publication Date
EP1419221A2 EP1419221A2 (fr) 2004-05-19
EP1419221B1 true EP1419221B1 (fr) 2006-06-07

Family

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Application Number Title Priority Date Filing Date
EP02764842A Expired - Lifetime EP1419221B1 (fr) 2001-08-15 2002-08-10 Procede de nettoyage de prerefroidisseurs d'une cokerie

Country Status (9)

Country Link
EP (1) EP1419221B1 (fr)
KR (1) KR20040025935A (fr)
CN (1) CN1543497A (fr)
AT (1) ATE328985T1 (fr)
AU (1) AU2002329241A1 (fr)
DE (2) DE10139172C1 (fr)
TW (1) TW555844B (fr)
WO (1) WO2003016437A2 (fr)
ZA (1) ZA200400726B (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107413778A (zh) * 2017-04-27 2017-12-01 唐山钢铁集团有限责任公司 一种降低焦化终冷器阻力的清洗方法
CN107916144B (zh) * 2017-12-21 2023-06-16 中冶焦耐(大连)工程技术有限公司 一种具有反冲洗功能的初冷器喷洒装置及其使用方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614851A1 (de) * 1986-05-02 1987-11-05 Still Carl Gmbh Co Kg Verfahren zur kuehlung von koksofenrohgas

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074815B (de) * 1960-02-04 Fa Carl Still Recklinghausen Verfahren zur Gewinnung von Kohlenwertstoffen aus Kokereigasen
DE2652499A1 (de) * 1976-11-18 1978-05-24 Otto & Co Gmbh Dr C Verfahren zum behandeln des kokereigases in einem mittelbaren vorkuehler
DE3423798A1 (de) * 1984-06-28 1986-01-09 Bergwerksverband Gmbh, 4300 Essen Verfahren zur auftrennung des beim verkokungsprozess anfallenden wassers in eine kleine salzreiche und eine grosse salzarme fraktion
DE4012141A1 (de) * 1990-04-14 1991-10-17 Still Otto Gmbh Verfahren zur vorkuehlung von kokereirohgas und zur desorption von waschwaessern und kondensaten der kokerei
DE10007503B4 (de) * 2000-02-18 2004-05-27 Deutsche Montan Technologie Gmbh Verfahren zur Behandlung von Koksofenrohgas
DE10051349B4 (de) * 2000-10-17 2005-02-03 Deutsche Montan Technologie Gmbh Verfahren und Vorrichtungen zur Gewinnung von Naphtalin aus Koksofenrohgas

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614851A1 (de) * 1986-05-02 1987-11-05 Still Carl Gmbh Co Kg Verfahren zur kuehlung von koksofenrohgas

Also Published As

Publication number Publication date
CN1543497A (zh) 2004-11-03
ZA200400726B (en) 2004-03-02
ATE328985T1 (de) 2006-06-15
WO2003016437A3 (fr) 2003-09-25
TW555844B (en) 2003-10-01
WO2003016437A2 (fr) 2003-02-27
DE50207122D1 (de) 2006-07-20
AU2002329241A1 (en) 2003-03-03
EP1419221A2 (fr) 2004-05-19
DE10139172C1 (de) 2003-02-06
KR20040025935A (ko) 2004-03-26

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