US3532542A - Method of removing deposited carbon from a thermal cracking apparatus - Google Patents

Method of removing deposited carbon from a thermal cracking apparatus Download PDF

Info

Publication number
US3532542A
US3532542A US652970A US3532542DA US3532542A US 3532542 A US3532542 A US 3532542A US 652970 A US652970 A US 652970A US 3532542D A US3532542D A US 3532542DA US 3532542 A US3532542 A US 3532542A
Authority
US
United States
Prior art keywords
furnace
pipe
thermal cracking
exchanger
deposited carbon
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
US652970A
Other languages
English (en)
Inventor
Hiroharu Shimizu
Kinichi Omura
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.)
Idemitsu Petrochemical Co Ltd
Original Assignee
Idemitsu Petrochemical Co Ltd
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 Idemitsu Petrochemical Co Ltd filed Critical Idemitsu Petrochemical Co Ltd
Application granted granted Critical
Publication of US3532542A publication Critical patent/US3532542A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J12/00—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor
    • B01J12/005—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor carried out at high temperatures, e.g. by pyrolysis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
    • B01J19/0026—Avoiding carbon deposits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/2415—Tubular reactors
    • B01J19/242—Tubular reactors in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
    • B08B7/0071—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by heating
    • 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
    • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
    • C10G9/16—Preventing or removing incrustation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
    • B01J2219/00094—Jackets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00159—Controlling the temperature controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00162—Controlling or regulating processes controlling the pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam

Definitions

  • the invention relates to a piping system for and a method of removing deposited carbon from a thermal cracking apparatus.
  • a branched pipe is connected to the outlet of the transfer line exchanger and is closed by a valve during normal operation of the thermal cracking apparatus.
  • the supply of raw material to the apparatus is replaced by a supply of steam and air, the proportion of these components being controlled so that only steam is supplied during the initial phase and subsequently the proportion of air is increased up to
  • the valve in the outlet pipe of the transfer line exchanger is closed, and the valve which normally blocks the branched pipe is opened to exhaust the combustion products from every part of the apparatus.
  • a pyrolysis furnace contains an internal piping 2 which is connected with a supply pipe 3 and with an outlet pipe 4.
  • raw material to be pyrolyzed for example, naphtha is supplied through the pipe 3 at a rate of tons per day and the pyrolysis product from the furnace 1 is passed through a transfer line exchanger 5 for heat exchange, and is then fed to a main fractionator which is not shown, via a pipe 6 and a valve 7 which is normally kept open.
  • a branched pipe 8 is connected to the pipe 6, but is usually closed by a valve 9.
  • the supply of raw material through the inlet pipe 3 is replaced by a mixture of steam and air.
  • the amount chosen is 100 tons per day of steam at a gauge pressure of 14 kg./cm. and 4000 cubic meters per day of air.
  • the inlet of the internal piping 2 will be at about 200 C., while the outlet pipe will be subject to a high temperature between 650 C. and 700 C., since the temperature of the atmosphere within the furnace is in the range of 1000 to 1500 C.
  • the valve 7 is closed and the valve 9 is open.
  • the heating of the furnace 1 is interrupted, but the heat exchanger 5 may be conveniently kept in operation to dissipate heat carried by flow of combustion products therethrough which are at elevated temperatures.
  • the heat exchanger 5 also serves to produce steam from cooling water.
  • the whole apparatus namely, furnace 1, outlet pipe 4 and the exchanger 5 are simultaneously decoked, with the combustion products being exhausted through the common exhaust or branched pipe 8.
  • the decoking operation according to the invention is performed without the necessity of allowing the furnace to cool, dismounting the pipe connections and attaching a blind plate to the outlet pipe of the furnace, or mechanically scavenging the exchanger and the outlet pipe, with the consequence that the rate of thermal cracking operation is considerably improved.
  • valve 9 Upon completion of the removal of deposited carbon from the apparatus, the valve 9 is closed and the valve 7 is opened, and the apparatus is then once again ready for normal operation.
  • a method of removing carbonaceous deposits by oxidation from a thermal cracking apparatus of the type comprising a pyrolysis furnace having an internal piping, a transfer line exchanger, and a pipe connecting the outlet of the furnace with said exchanger, said outlet being at a temperature in excess of 600 during normal operation thereof, wherein the internal piping, the exchanger and the pipe all have carbonaceous deposits therein, said method comprising passing, immediately after the supply of raw material hydrocarbon to the furnace has been discontinued and without cooling the furnace, a mixture of steam and air through the furnace, the pipe and the exchanger in series to simultaneously combust said carbonaceous deposits formed in the internal piping of the furnace, the pipe and the exchanger, and removing the combustion products from the apparatus only at a position downstream from the transfer line exchanger.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Prevention Of Fouling (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US652970A 1966-07-25 1967-07-12 Method of removing deposited carbon from a thermal cracking apparatus Expired - Lifetime US3532542A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP41048307A JPS503268B1 (enrdf_load_stackoverflow) 1966-07-25 1966-07-25

Publications (1)

Publication Number Publication Date
US3532542A true US3532542A (en) 1970-10-06

Family

ID=12799750

Family Applications (1)

Application Number Title Priority Date Filing Date
US652970A Expired - Lifetime US3532542A (en) 1966-07-25 1967-07-12 Method of removing deposited carbon from a thermal cracking apparatus

Country Status (5)

Country Link
US (1) US3532542A (enrdf_load_stackoverflow)
JP (1) JPS503268B1 (enrdf_load_stackoverflow)
ES (1) ES343351A1 (enrdf_load_stackoverflow)
GB (1) GB1186614A (enrdf_load_stackoverflow)
NL (1) NL6709992A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964976A (en) * 1974-06-28 1976-06-22 Allied Chemical Corporation Process for cleaning coke oven gas offtakes
US4376694A (en) * 1979-06-08 1983-03-15 Linde Aktiengesellschaft Method of decoking a cracking plant
US4377420A (en) * 1980-03-06 1983-03-22 United Technologies Corporation Removal of carbonaceous material from gas turbine cavities
US4420343A (en) * 1980-03-15 1983-12-13 Basf Aktiengesellschaft Process for the thermal decoking of cracked gas coolers
US5501878A (en) * 1993-10-08 1996-03-26 Mannesmann Aktiengesellschaft Process for reducing the carbonization of heat exchange surfaces
US6228253B1 (en) 1997-06-05 2001-05-08 Zalman Gandman Method for removing and suppressing coke formation during pyrolysis
US20030230324A1 (en) * 2002-03-15 2003-12-18 Institut Francais Du Petrole Process for the at least partial elimination of carbon deposits in a heat exchanger
US20070261991A1 (en) * 2006-05-11 2007-11-15 David Beattie Pyrolysis furnace feed
US20090211948A1 (en) * 2008-02-22 2009-08-27 Herbert Meier Method and device for switching over shut-off members on cracking furnaces
US20220098492A1 (en) * 2019-02-12 2022-03-31 Nova Chemicals (International) S.A. Decoking Process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5101741A (en) * 1991-05-10 1992-04-07 Jwp Air Technologies Flow line bake-out process for incinerator
CN114289420B (zh) * 2022-02-21 2023-09-01 常州二维碳素科技股份有限公司 一种cvd生长石墨烯粉体中进气管内壁积碳去除方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1470359A (en) * 1917-04-17 1923-10-09 Gasolene Corp Process of removing carbon from metal pipes
US1919672A (en) * 1930-03-20 1933-07-25 Sun Oil Co Process for cooling and safeguarding oil cracking apparatus
US2289350A (en) * 1937-12-29 1942-07-14 Texas Co Method of reconditioning furnace tubes
US2289351A (en) * 1939-04-06 1942-07-14 Texas Co Method of cleaning heater tubes
US2537079A (en) * 1948-06-04 1951-01-09 Standard Oil Dev Co Prevention of coke formation in pyrolysis of acetone
US2577254A (en) * 1947-01-20 1951-12-04 Phillips Petroleum Co Removing carbon and carbonaceous deposits from heat exchanger equipment
US2671741A (en) * 1950-02-23 1954-03-09 Texas Co Decoking and cleaning tubular heaters
US3054700A (en) * 1959-10-21 1962-09-18 British Petroleum Co Method of cleaning heat exchangers

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1470359A (en) * 1917-04-17 1923-10-09 Gasolene Corp Process of removing carbon from metal pipes
US1919672A (en) * 1930-03-20 1933-07-25 Sun Oil Co Process for cooling and safeguarding oil cracking apparatus
US2289350A (en) * 1937-12-29 1942-07-14 Texas Co Method of reconditioning furnace tubes
US2289351A (en) * 1939-04-06 1942-07-14 Texas Co Method of cleaning heater tubes
US2577254A (en) * 1947-01-20 1951-12-04 Phillips Petroleum Co Removing carbon and carbonaceous deposits from heat exchanger equipment
US2537079A (en) * 1948-06-04 1951-01-09 Standard Oil Dev Co Prevention of coke formation in pyrolysis of acetone
US2671741A (en) * 1950-02-23 1954-03-09 Texas Co Decoking and cleaning tubular heaters
US3054700A (en) * 1959-10-21 1962-09-18 British Petroleum Co Method of cleaning heat exchangers

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964976A (en) * 1974-06-28 1976-06-22 Allied Chemical Corporation Process for cleaning coke oven gas offtakes
US4376694A (en) * 1979-06-08 1983-03-15 Linde Aktiengesellschaft Method of decoking a cracking plant
US4377420A (en) * 1980-03-06 1983-03-22 United Technologies Corporation Removal of carbonaceous material from gas turbine cavities
US4420343A (en) * 1980-03-15 1983-12-13 Basf Aktiengesellschaft Process for the thermal decoking of cracked gas coolers
US5501878A (en) * 1993-10-08 1996-03-26 Mannesmann Aktiengesellschaft Process for reducing the carbonization of heat exchange surfaces
US6228253B1 (en) 1997-06-05 2001-05-08 Zalman Gandman Method for removing and suppressing coke formation during pyrolysis
US20030230324A1 (en) * 2002-03-15 2003-12-18 Institut Francais Du Petrole Process for the at least partial elimination of carbon deposits in a heat exchanger
US6929015B2 (en) * 2002-03-15 2005-08-16 Institut Francais Du Petrole Process for the at least partial elimination of carbon deposits in a heat exchanger
US20070261991A1 (en) * 2006-05-11 2007-11-15 David Beattie Pyrolysis furnace feed
US7625480B2 (en) * 2006-05-11 2009-12-01 Exxonmobil Chemical Patents Inc. Pyrolysis furnace feed
US20090211948A1 (en) * 2008-02-22 2009-08-27 Herbert Meier Method and device for switching over shut-off members on cracking furnaces
US20220098492A1 (en) * 2019-02-12 2022-03-31 Nova Chemicals (International) S.A. Decoking Process
US11939544B2 (en) * 2019-02-12 2024-03-26 Nova Chemicals (International) S.A. Decoking process

Also Published As

Publication number Publication date
JPS503268B1 (enrdf_load_stackoverflow) 1975-02-01
GB1186614A (en) 1970-04-02
ES343351A1 (es) 1968-09-01
NL6709992A (enrdf_load_stackoverflow) 1968-01-26

Similar Documents

Publication Publication Date Title
US3365387A (en) Off-stream decoking of a minor portion of on-stream thermal cracking tubes
US3532542A (en) Method of removing deposited carbon from a thermal cracking apparatus
JP4251303B2 (ja) 出発物質よりも不飽和である脂肪族炭化水素への水蒸気クラッキング工程と熱分解工程とを組合わせる炭化水素熱転換方法およびその装置
US2289351A (en) Method of cleaning heater tubes
US4376694A (en) Method of decoking a cracking plant
US4420343A (en) Process for the thermal decoking of cracked gas coolers
CN107267168B (zh) 焦化炉出口的在线清管和散裂的系统
US2893941A (en) Removing and preventing coke formation in tubular heaters by use of potassium carbonate
WO2016099608A1 (en) Process and apparatus for decoking a hydrocarbon steam cracking furnace
US3557241A (en) Decoking of onstream thermal cracking tubes with h20 and h2
US3392211A (en) Production of ethylene by thermal cracking of hydrocarbons
US2577254A (en) Removing carbon and carbonaceous deposits from heat exchanger equipment
JP2557030B2 (ja) 分解炉及び後段に設けられた分解ガス冷却器を熱デコーキングするための方法
US2580766A (en) Process for manufacturing oil gas
US2432885A (en) Furnace
US6187147B1 (en) Delayed coker unit furnace
US9359555B2 (en) Delayed coker feed heater on-line steam-chemical decoking method
US3593779A (en) Heat exchanger for quenching thermally cracked gas
US3054700A (en) Method of cleaning heat exchangers
US3607153A (en) Quench arrangement
US20080234868A1 (en) Method and apparatus for decoking tubes in an oil refinery furnace
US2288272A (en) Converter furnace
JPS6332118B2 (enrdf_load_stackoverflow)
DE2645919A1 (de) Verfahren zum reinigen einer vorrichtung zur spaltung von kohlenwasserstoffen
SU717124A1 (ru) Способ защиты аппаратов от закоксовывани