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21. 发明专利

JPH08143870A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH08143870A
公开(公告)日：1996-06-04
申请号：JP30838194
申请日：1994-11-18
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , ENDO KOHEI , IGUCHI KENJI , YOSHIDA YOSHIHARU
IPC分类号： C10G1/06 , C10G1/08
摘要： PURPOSE: To raise the hydrogen donating properties of a circulating solvent in a short time and clarify conditions for making a process system attain an equilibrium state in a coal liquefying process, comprising four steps of a slurry preparing step, a coal liquefying step, a liquefied oil distilling step and a solvent hydrogenating step, circulating and using a solvent for liquefying coal obtained in the solvent hydrogenating step in the slurry preparing step. CONSTITUTION: The mixing ratio of a medium oil to a heavy oil and the amount of a circulating solvent fed to a solvent hydrogenating step are regulated to constant values in mixing a part or the total amount of the medium oil obtained in a liquefied oil distilling step with the total amount of the heavy oil and hydrogenating the resultant mixture in the solvent hydrogenating step. Thereby, the fluctuation in the aromatic carbon fraction in the circulating solvent is suppressed to enable the stable production of the circulating solvent having the high hydrogen donative properties in a short period. Furthermore, control is performed so as to keep the total amount of the circulating solvents fed to the solvent hydrogenating step and the coal liquefying step within a prescribed range. As a result, the whole coal liquefying process is stabilized.

22. 发明专利

JPH07305073A METHOD FOR STABLY TAKING OUT LIQUEFACTION RESIDUE IN COAL LIQUEFYING PROCESS 失效
公开(公告)号：JPH07305073A
公开(公告)日：1995-11-21
申请号：JP12325794
申请日：1994-05-13
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , IGUCHI KENJI
IPC分类号： C10G1/00 , C10G1/06
摘要： PURPOSE:To provide a method for properly operating a vacuum distillation column by which an apparatus is improved so as to enable the stable taking out of a liquefaction residue even when the softening point of the liquefaction residue is raised in a coal liquefying process comprising four steps of a slurry preparing step, a coal liquefying step, a liquefied oil distillation step and a solvent hydrogenating step and circulating the solvent for liquefying the coal obtained in the hydrogenating step for the solvent through the slurry preparing step for use. CONSTITUTION:This method for stably taking out a liquefaction residue in a coal liquefying process is to install a takeout valve 51 used for taking out the liquefaction residue from the bottom of a vacuum distillation column 43 in a liquefied oil distillation step and further gas purging lines 52 before and after the takeout valve 51, use the lines, carry out the gas purging of the takeout valve, thereby remove the liquefaction residue sticking to parts before and after the takeout valve and take out the liquefaction residue.

23. 发明专利

JPH07305071A METHOD FOR LIQUEFYING COAL 失效
公开(公告)号：JPH07305071A
公开(公告)日：1995-11-21
申请号：JP12325694
申请日：1994-05-13
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , ENDO KOHEI , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/06 , C10G1/08
摘要： PURPOSE:To provide a method for liquefying coal by which the hydrogen donating properties of a circulating solvent are enhanced in a short period as much as possible and conditions for keeping the coal liquefying process system in an equilibrium state are obtained in the coal liquefying process, comprising four steps of a slurry preparing step, a coal liquefying step, a liquefied oil distillation step and a solvent hydrogenating step and circulating the solvent for liquefying the coal through the slurry preparing step for use. CONSTITUTION:This method for liquefying coal is to bisect the operating period into the former and the latter halves, perform the operation according to an operation pattern for taking out the total amount of a light oil and a part of a medium oil obtained in a liquefied oil distillation step as a product oil to the outside of the system and using the remainder of the medium oil and the total amount of a heavy oil as a feed solvent for a solvent hydrogenating step during the operating period of the former half, carry out the operation according to an operation pattern for taking out the total amount of the light oil as the product oil to the outside of the system and using the total amounts of the medium oil and the heavy oil as the feed solvent for the solvent hydrogenating step during the operating period of the latter half and take out the excessive solvent for liquefying the coal to the outside of the system.

24. 发明专利

JPH09296180A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH09296180A
公开(公告)日：1997-11-18
申请号：JP10831896
申请日：1996-04-30
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： IKEDA KOICHI , IMADA KUNIHIRO , MOCHIZUKI MICHIHARU , IGUCHI KENJI , MITA SHIGERU , MIHASHI TOSHITSUGU
IPC分类号： C10G1/06 , C10G1/08
摘要： PROBLEM TO BE SOLVED: To efficiently, economically and advantageously liquefy coal by mixing the coal with a solvent and a catalyst for liquefying the coal, providing a slurry, evaluating properties of contents of each reactional column comprising multistage liquefying reactional columns, regulating operating conditions for each reactional column and carrying out the hydrogenolysis. SOLUTION: For example, a sample collecting device equipped with a receiver 1, a nozzle 2 for collection, a collecting valve 4, a degassing valve 5, a sample recovering valve 6, an inert gas introduction valve 7, etc., is installed in each liquefying reactional column, etc., to collect contents of each liquefying reactional column therefrom. Properties of the contents such as coal conversion rate and a liquefied oil yield are evaluated to perform the regulation (e.g. the regulation of the reactional time, concretely regulation of the number of the liquefying reactional columns used) of operating conditions according to progress conditions of the liquefying reaction for each liquefying reactional column when mixing the coal with a solvent and a catalyst for liquefying the coal, carrying out the hydrogenolysis of the resultant coal slurry with hydrogen gas under high temperature and pressure conditions using a reactional column 3 comprising the continuous multistage liquefying reactional columns and liquefying the coal.

25. 发明专利

JPH09296179A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH09296179A
公开(公告)日：1997-11-18
申请号：JP10831996
申请日：1996-04-30
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： AIHARA YOICHI , IMADA KUNIHIRO , ITONAGA MASUMI , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： B01J23/847 , B01J23/88 , C10G1/06
摘要： PROBLEM TO BE SOLVED: To stably liquefy coal at a high efficiency by mixing the coal with a solvent and a catalyst, carrying out the hydrogenolysis of the resultant slurry, providing a liquefied oil, distilling the prepared liquefied oil, controlling the feed rates of a medium oil and a heavy oil obtained by the distillation, hydrogenating the oils, affording a solvent with a constant aromatic hydrocarbon fraction and circulating the solvent for use. SOLUTION: Coal 1 is mixed with a catalyst 2 for liquefying the coal 1 and a solvent 3 for liquefying the coal 1 to provide a slurry 4, which is then heated and pressurized in the presence of hydrogen 5 to carry out the pyrolysis and hydrogenolysis reactions. Thereby, a liquefied oil is obtained, distilled under atmospheric and reduced pressures and separated into a product oil and a liquefaction residue. The feed rates of a part or all of the resultant medium oil 11 and a heavy oil 12 are controlled with a feed pump 14, etc., so as to keep the aromatic hydrocarbon fraction (fa ) of the produced solvent 3 for liquefying the coal 1 constant and hydrogenolysis is conducted by using a catalyst for hydrogenating the solvent 3 to produce the solvent 3 for liquefying the coal 1 at a constant fa . The resultant solvent 3 for liquefying the coal 1 is circulated for use in slurrying of the coal 1.

26. 发明专利

JPH08269458A PREPARATION OF COAL SLURRY 失效
公开(公告)号：JPH08269458A
公开(公告)日：1996-10-15
申请号：JP7517095
申请日：1995-03-31
申请人： AGENCY IND SCIENCE TECHN , MITSUI SEKITAN EKIKA KK , NIPPON STEEL CORP
发明人： SAKAKI TAKESHI , SHIBATA MASAO , HIROSUE HIDEHARU , SAKAWAKI KOJI , NOGAMI YOSHINOBU , IGUCHI KENJI , KAWABATA MUTSUMARO , ENDO KOHEI
IPC分类号： C10G1/00 , C10G1/06
摘要： PURPOSE: To obtain a coal slurry for coal liquefaction which enables stable and efficient transport and efficient coal liquefaction without decreasing the coal concn. by decreasing the viscosity. CONSTITUTION: A coal slurry is prepd. by pulverizing coal to give a powder contg. 90wt.% or higher 100 mesh undersize, reducing the water content of the powder to 85% or lower of the equilibrium moisture of coal, and mixing the powder with a coal liquefaction solvent and a coal liquefaction catalyst.

27. 发明专利

JPH06287571A PREPARATION OF COAL SLURRY IN COAL LIQUEFACTION PROCESS 失效
公开(公告)号：JPH06287571A
公开(公告)日：1994-10-11
申请号：JP7979093
申请日：1993-04-06
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , KAWABATA MUTSUMARO , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/06 , C10G1/08 , C10L1/32 , C10L10/18
摘要： PURPOSE:To provide a coal slurry preparation process whereby the feed trouble arising from an increase in the slurry viscosity in a coal slurry preparation step can be prevented. CONSTITUTION:This process for preparing a coal slurry by mixing feed coal with a solvent for coal liquefaction, a catalyst for coal liquefaction and a surfactant comprises setting the temperature in the slurry preparation at 50-150 deg.C, adjusting the time of the slurry preparation, adjusting the sheer rate of the slurry so that the relationship between the sheer rate of the slurry and the shear stress of the slurry may lie within the second region of Neutonian flow, and thereby adjusting the viscosity of the slurry to a necessary value. According to the process, a slurry feed trouble in the slurry preparation can be prevented even when coal highly swellable in the solvent and apt to form a highly viscous slurry is used, and the operation cost can be reduced.

28. 发明专利

JPH0665581A METHOD FOR ADJUSTING COAL SLURRY IN COAL LIQUEFACTION PROCESS 失效
公开(公告)号：JPH0665581A
公开(公告)日：1994-03-08
申请号：JP24144592
申请日：1992-08-19
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , KATO KENJI , KAWABATA MUTSUMARO , YAMAMOTO HISANORI , IGUCHI KENJI , NOGAMI YOSHINOBU
IPC分类号： C10G1/00 , C10G1/06
摘要： PURPOSE:To prevent the occurrence of feed troubles due to increase in slurry viscosity in preparing a coal slurry in the coal liquefaction process by controlling the temp. of the slurry in preparation, time of recirculation for stirring and mixing, and shear rate corresponding to the type of coal. CONSTITUTION:A coal slurry is prepd. by mixing and stirring coal, a coal liquefaction solvent, and a coal liquefaction catalyst by recirculating them through a slurry recirculation line 23. The final viscosity of the slurry is adjusted by specifying the temp. of the slurry in preparation to be in the range of 50-150 deg.C, recirculating the slurry at the specified temp., and simultaneously adjusting the time of recirculation. Furthermore, the relation between the shear rate and shear stress of slurry, which is determined by the flow rate of slurry and the radius of piping, is kept in the range of Newtonian flow by controlling the flow rate of slurry in the recirculation line 23 with slurry recirculation pumps 21 and 22 and by controlling the speed of stirring in a slurry preparation vessel 19.

29. 发明专利

JPH0617942A BALL VALVE OF HIGH-PRESSURE SLURRY SUPPLY PUMP 失效
公开(公告)号：JPH0617942A
公开(公告)日：1994-01-25
申请号：JP36156691
申请日：1991-12-26
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： MOCHIZUKI MICHIHARU , MIYATA TADASHI , KATO KENJI , DOI YOSHIAKI , YAMAMOTO HISANORI , IGUCHI KENJI
IPC分类号： F16K1/14 , F16K51/00
摘要： PURPOSE:To provide a ball valve of a high-pressure slurry supply pump, used in transferring slurry containing solid particles at high pressure, with such a structure that when the slurry is transferred solid rough particles are not retained in the ball valve. CONSTITUTION:In a ball valve of a pump for supplying high-pressure slurry 11, the clearance 13 between a ball 15 and a guide 12 is equal to or greater than the maximum grain size of solid particles contained in the slurry and the rate of the open area of the ball valve as determined by the size of the ball 15 and guide 12 is 45% or more.

30. 发明专利

JPH05320663A LIQUEFACTION OF COAL 失效
公开(公告)号：JPH05320663A
公开(公告)日：1993-12-03
申请号：JP14800792
申请日：1992-05-15
申请人： NIPPON STEEL CORP , MITSUI SEKITAN EKIKA KK
发明人： KATO KENJI , KAWABATA MUTSUMARO , TERASHITA YASUSHI , MOCHIZUKI MICHIHARU , YAMAMOTO HISANORI , IGUCHI KENJI , YAMAURA JUNJI
IPC分类号： C10G1/06
摘要： PURPOSE:To stabilize the properties of a solvent for coal liquefaction to thereby stabilize the yields and properties of the liquefied product by calculating the temperature in a solvent hydrogenation tower according to a specified relationship and controlling the temperature in the tower according to the calculated temperature. CONSTITUTION:This liquefaction process comprises separating and recovering the coal liquefaction solvent from the liquefied product, hydrogenating the solvent in a hydrogenation tower and recirculating the hydrogenated solvent. The reaction temperature T ( deg.K) necessary for attaining the desired aromatic carbon fraction of the solvent in the solvent hydro-genation process is calculated according to the formula (wherein f0 is the aromatic carbon fraction of the solvent before hydro-genation; (f) is the aromatic carbon fraction of the solvent after hydrogenation; (k) is the rate constant (hr ) of the nucleus hydrogenation reaction; LHSV is the liquid hourly space velocity (hr ); A is the frequency factor; E is the activation energy; and R is the gas constant) and controlling the temperature in the hydrogenation tower by changing the exit temperature of the solvent hydrogenation preheater unit it reaches the target reaction temperature T when the reaction temperature during the hydrogenation exceeds a specified range of temperature variation at a specified frequency of temperature check.

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