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    Furnace over-pressure prevention
    3.
    发明授权
    Furnace over-pressure prevention 失效
    炉超压预防

    公开(公告)号：US3889877A

    公开(公告)日：1975-06-17

    申请号：US37945273

    申请日：1973-07-16

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： KIVLEN JOHN A

    IPC: B01J19/00 ,  C10G9/20 ,  F23M11/00 ,  F23N5/24

    CPC classification number: B01J19/002 ,  B01J2219/0027 ,  C10G9/206 ,  F23M11/00 ,  F28F2265/12

    Abstract: An apparatus for preventing the over-pressuring of a furnace which comprises a small diameter heat resistant tube inserted through the side of the furnace just below the convection section. A thermocouple is used to detect whether cool air is passing through the tube into the furnace because it is operating with a negative pressure or whether the pressure is positive and hot combustion gases are flowing out of the furnace. The change in temperature is detected and used to warn operating personnel of potential damage to the furnace. The temperature change may also be used to take some predetermined corrective action automatically.

    Abstract translation: 一种用于防止炉子过度加压的装置，其包括通过刚好在对流部分下方的炉子侧插入的小直径耐热管。 热电偶用于检测冷空气是否通过管进入炉，因为它是在负压下运行，还是压力是正的，热的燃烧气体从炉中流出。 检测温度变化并用于警告操作人员对炉子的潜在损坏。 温度变化也可以用于自动采取一些预定的纠正措施。

    Decoking of onstream thermal cracking tubes
    5.
    发明授权
    Decoking of onstream thermal cracking tubes 失效
    破碎的热带热裂纹管

    公开(公告)号：US3641190A

    公开(公告)日：1972-02-08

    申请号：US3641190D

    申请日：1969-01-22

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： KIVLEN JOHN A ,  STRUTH BERT W ,  WEISS CLIFFORD P

    IPC: B01J19/24 ,  C10G9/16 ,  C07C3/30

    CPC classification number: B01J19/243 ,  B01J2219/00157 ,  B01J2219/00159 ,  B01J2219/00166 ,  C10G9/16 ,  Y10S585/95

    Abstract: THERMAL CRACKING OF HYDROCARBONS IN ADMIXTURE WITH STEAM IN TUBES ARRANGED IN A CRACKING FURNACE LEADS TO THE DEPOSITION OF COKE ON THE INTERIOR WALLS OF THE TUBES, WHICH COKE MUST BE PERIODICALLY REMOVED IN ORDER TO MAINTAIN CRACKING EFFICIENCY; THE COKE CAN BE REMOVED, WITHOUT THE NECESSITY OF SHUTTING DOWN THE FURNACE, BY CUTTING OUT THE COKING HYDROCARBON FEED TO AT LEAST ONE TUBE AND PASSING THROUGH SUCH TUBE OR TUBES A DECOKING FEED OF STEAM AND A HYDROCARBON WHICH WHEN CRACKED WILL PRODUCE HYDROGEN AS A BY-PRODUCT, THE DECOKING FEED BEING SUBSTANTIALLY SULFUR FREE, WHILE MAINTAINING THE FURNACE ONSTREAM AND CONTINUING THE THERMAL CRACKING PROCESS IN THE TUBES THAT ARE NOT BEING DECOKED.

    Pyrolysis of hydrocarbons
    6.
    发明授权
    Pyrolysis of hydrocarbons 失效
    油料热解

    公开(公告)号：US3579601A

    公开(公告)日：1971-05-18

    申请号：US3579601D

    申请日：1968-06-10

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： KIVLEN JOHN A

    IPC: C10G51/00 ,  C07C3/08 ,  C10G9/14 ,  C10G9/20

    CPC classification number: C10G51/00 ,  C10G2400/20 ,  Y10S585/924 ,  Y10S585/95

    Abstract: THIS INVENTION RELATES TO PROCESS AND APPARATUS FOR THE PYROLSIS, OR THERMAL CRACKING, OF HYDROCARBONS OR HYDROCARBON FEEDSTOCKS TO PRODUCE PRODUCTS USEFUL AS CHEMICAL RAW MATERIALS OR FUELS. IN PARTICULAR, MOBILE HYDROCARBONS, I.E., NORMALLY GASEOUS OR LIQUID PARAFFINIC HYDROCARBONS, OR OTHER SUITABLE FEEDSTOCKS, ARE CRACKED TO OBTAIN UNSATURATED HYDROCARBON COMPOUNDS, PARTICULARLY OLEFINS. FASTER REACTION RATES, INCREASED PRODUCT YIELDS, AND BETTER SELECTIVITIES ARE OBTAINED BY THERMALLY CRACKING (WITH OR WITH OUT STEAM) A RAW, OR FRESH HYDROCARBON FEED IN ADMIXTURE WITH A STREAM OF HOT REACTING, THERMALLY CRACKED (WITH OR WITHOUT STEAM) PRODUCT. THE PROCESS IS THUS CHARACTERIZED BY STEPS WHEREIN A FEED IS THERMALLY CRACKED TO FORM AT LEAST PARTIALLY CONVERTED PRODUCTS, AND FRESH FEED, WHICH PREFERABLY IS PREHEATED TO SUPPLY SOME OF THE NEEDED SENSIBLE AND REACTION HEAT, IS THERMALLY CRACKED IN ADMIXTURE WITH THE SAID AT LEAST PARTIALLY CONVERTED PRODUCTS. IN ONE EMBODIMENT, FRESH HYDROCARBON FEED, AND STEAM IF DESIRED, IS PREHEATED AND FED AT SPACED LOCATIONS THROUGH A TUBULAR REACTOR, OR REACTION ZONE, RESULTING IN FRESH FEED BEING CONTACTED WITH AT LEAST PARTIALLY CONVERTED PRODUCTS FROM A PRECEDING PORTION OF THE TUBULAR REACTOR, OR REACTION ZONE (EXCEPT FOR THE PORTION INTRODUCED AT THE ENTRANCE TO THE REACTOR).

    Shield tube supports
    7.
    发明授权
    Shield tube supports 失效
    屏蔽管支架

    公开(公告)号：US3885530A

    公开(公告)日：1975-05-27

    申请号：US48552374

    申请日：1974-07-03

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： KIVLEN JOHN A ,  MASSEY JR JAMES E ,  MARTIN JR JAMES H

    IPC: F16L3/00 ,  B01J8/06 ,  B01J19/00 ,  B01J19/24 ,  C10G9/00 ,  C10G9/20 ,  F22B37/20 ,  F27D5/00 ,  F22B37/24

    CPC classification number: F22B37/204 ,  C10G9/20

    Abstract: An improved support is disclosed for furnace shield tubes, which are located between the radiant and convection sections of industrial furnaces, and which, since they are exposed to radiant heat, are subject to significant weakening. In the preferred embodiment, a hollow pipe serves as a beam support for the shield tubes, the support being extensively insulated to minimize radiant heat input and being cooled by air passing inside it as induced by natural draft available from the furnace. Air from outside the furnace is drawn into the hollow support, cools it and passes out into the furnace stack above the convection section. The support beam is cooled by air while the supports on which the shield tubes rest are cooled by conduction, either into the air cooled support or into the shield tubes. Contact of the supports with radiant energy is avoided.

    Abstract translation: 公开了一种改进的支架，用于炉屏蔽管，其位于工业炉的辐射和对流部分之间，并且由于它们暴露于辐射热，所以其受到显着的弱化。 在优选实施例中，中空管用作屏蔽管的梁支撑件，该支撑件被广泛地绝缘，以使辐射热输入最小化，并且由从炉中获得的自然通风引起的通过其中的空气被冷却。 从炉外的空气被吸入中空支撑件中，冷却并排出到对流段上方的炉垛中。 支撑梁由空气冷却，而屏蔽管所搁置的支撑件通过导电冷却，或者进入空气冷却的支撑件或屏蔽管中。 避免支撑与辐射能的接触。

    Decoking of onstream thermal cracking tubes with h20 and h2
    8.
    发明授权
    Decoking of onstream thermal cracking tubes with h20 and h2 失效
    用H20和H2破坏ON AM热裂纹管

    公开(公告)号：US3557241A

    公开(公告)日：1971-01-19

    申请号：US3557241D

    申请日：1968-10-16

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： KIVLEN JOHN A ,  KOSZMAN IHOR

    IPC: C10G9/16 ,  C07C3/00 ,  C10G9/12

    CPC classification number: C10G9/16 ,  Y10S585/95

    Abstract: THERMAL CRACKING OF HYDROCARBONS IN ADMIXTURE WITH STEAM IN TUBES ARRANGED IN A CRACKING FURNACE LEADS TO THE DEPOSITION OF COKE ON THE INTERIOR WALLS OF THE TUBES, WHICH COKE MUST BE PERIODICALLY REMOVED IN ORDER TO MAINTAIN CRACKING EFFECIENCY; THE COKE CAN BE REMOVED, WITHOUT SHUTTING DOWN THE FURNACE, BY CUTTING OUT THE FEED TO AT LEAST ONE TUBE AND PASSING THROUGH SUCH TUBE OR TUBES A DECOKING FEED OF STREAM AND/OR WATER AND HYDROGEN, WHILE MAINTAINING THE FURNACE ONSTREAM AND CONTINUING THE THERMAL CRACKING PROCESS IN TUBES THAT ARE NOT BEING DECOKED.

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