JP5224101B2 - Method and apparatus for processing petroleum refining residue - Google Patents

Description

  The present invention relates to a method and apparatus for treating a petroleum refining residue, which can process a solid or liquid petroleum refining residue taken out from a petroleum refining facility at low cost by a single facility and stably generate steam.

  Petroleum coke (solid form), petroleum pitch (liquid form), asphalt (liquid form), etc. are taken out from the heavy residue oil treatment process of petroleum refining equipment for refining petroleum, and the amount is compared to these. In other words, other solid and liquid petroleum refining residues are also taken out. Since such petroleum refining residue contains a lot of carbon, it has been conventionally used as fuel for boilers and the like.

  FIG. 2 shows a conventional apparatus in which an oil refining residue taken out from the oil refining facility 1 is burned by a pulverized coal burner of a pulverized combustion boiler. The solid residue 2 such as petroleum coke taken out from the oil refining facility 1 in FIG. 2 has a lump shape and includes a large lump. The solid residue 2 is temporarily stored in the storage unit 3 and then supplied to the fine pulverizer 4 to be finely pulverized to form a finely pulverized residue 5. The finely pulverized residue 5 is pulverized coal burner of the pulverized combustion boiler 6. The steam 9 is generated by heating the heat transfer tube 8 of the fine powder combustion boiler 6 by supplying it to 7 and burning it.

  On the other hand, the liquid residue 10 such as petroleum pitch and asphalt taken out from the oil refining facility 1 originally has low fluidity, and when it is taken out from the oil refining facility 1 and the temperature is lowered, the fluidity is further drastically lowered. Etc. cannot be used for combustion. For this reason, all the liquid residue 10 taken out from the petroleum refining facility 1 is solidified by being supplied to the cooling solidification device 12 by the pump 11 or the like and cooled. The solid residue 10 ′ generated by cooling of the cooling and solidifying device 12 is temporarily stored in the storage unit 13, and then guided to the fine pulverizer 4 for fine pulverization. It was supplied to the burner 7 and burned.

Patent Document 1 discloses a fluidized bed combustion boiler that performs bubbling fluidized bed combustion by using coal, oil, gas, various wastes and the like as fuel and limestone as a desulfurizing agent. However, Patent Document 1 does not describe any configuration for effectively burning a solid residue or a liquid residue taken out from an oil refining facility by a single facility.
Japanese Patent Laid-Open No. 05-180413

  In the conventional apparatus shown in FIG. 2, the solid residue 2 taken out from the oil refining facility 1 needs to be finely pulverized to about 70 μm or less in the fine pulverizer 4 in order to stably burn with the pulverized coal burner 7. The fine pulverizer 4 is expensive and has a problem that the power consumption for fine pulverization is large and the running cost increases.

  Further, the liquid residue 10 taken out from the petroleum refining facility 1 is cooled and solidified by the cooling and solidifying device 12, and the resulting solid residue 10 'is guided to the fine pulverizer 4 for fine pulverization. For example, the petroleum pitch taken out from the oil refining facility 1 has a high temperature of about 300 ° C., but since this heat is wasted by cooling, there is a problem that heat loss is large. In addition, there is a problem that a large-sized cooling and solidifying device 12 for cooling and solidifying the liquid residue 10 is required and a large amount of cooling fluid (water) is required. Furthermore, since the solid residue 10 ′ which has been cooled and solidified is supplied to the pulverizer 4 and pulverized together with the solid residue 2, there is a problem that the pulverizer 4 becomes larger and the running cost further increases. is there.

  The present invention has been made in view of the above circumstances, so that a solid or liquid petroleum refining residue taken out from a petroleum refining facility can be processed at low cost by a single facility and a stable steam can be obtained. It is an object of the present invention to provide a method and apparatus for treating a raw oil refined residue.

The present invention relates to a method for treating a petroleum refined residue for treating solid and liquid residues taken out from a petroleum refining facility, wherein the solid residue is roughly pulverized to a particle size suitable for fluid combustion and then circulated Petroleum characterized in that it is supplied to a fluidized bed combustion furnace of a layered boiler and the liquid residue is supplied to the fluidized bed combustion furnace of the circulating fluidized bed boiler while maintaining the fluidizing temperature, and is co-fired to generate steam. The present invention relates to a method for treating a purified residue.

In the processing method of the petroleum refining residues, the oil refinery residue is made solid residue and liquid residue, solid Zansuna is petroleum coke, liquid residue at least one of asphalt and petroleum pitch There may be.

  In the method for treating a petroleum refining residue, it is preferable to use the steam generated in the circulating fluidized bed boiler by supplying it to a petroleum refining facility.

The present invention is a petroleum refining residue processing apparatus for processing solid and liquid residues taken out from petroleum refining equipment, and introduces solid residues and coarsely pulverizes them to a particle size suitable for fluid combustion. A fluidized bed combustion of the circulating fluidized bed boiler comprising a coarse grinding machine for supplying the obtained coarsely ground residue to a fluidized bed combustion furnace of a circulating fluidized bed boiler, and a temperature holding means for maintaining the liquid residue at a fluidization temperature. The present invention relates to a petroleum refining residue processing apparatus, characterized by comprising a liquid residue supply apparatus for supplying to a furnace.

  The above-mentioned petroleum refining residue processing apparatus preferably includes a cooling and solidifying device that takes out and cools the liquid residue of the liquid residue supply device and guides the solid residue obtained by cooling to the coarse pulverizer.

  According to the petroleum refining residue processing method and apparatus of the present invention, the solid residue taken out from the oil refining residue is roughly pulverized to a particle size suitable for fluid combustion in a fluidized bed combustion furnace of a circulating fluidized bed boiler. Since it is supplied to the fluidized bed combustion furnace and the liquid residue is supplied to the fluidized bed combustion furnace of the circulating fluidized bed boiler while maintaining the fluidization temperature, and steam is generated by co-firing, it is taken out from the oil refining equipment. Solid and liquid petroleum refining residues can be processed at low cost with a single facility, and at the same time, an excellent effect that steam can be stably generated can be achieved.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows an example of an apparatus for carrying out the method for treating a petroleum refining residue according to the present invention, in which a petroleum refining residue taken out from an oil refining facility is supplied to a fine powder combustion boiler and burned. As shown in FIG. 1, the solid residue 2 such as petroleum coke taken out from the petroleum refining facility 1 is temporarily stored in the storage unit 3 and then supplied to the coarse pulverizer 20 for coarse pulverization. Since the solid residue 2 includes a large lump, the coarse crusher 20 has a size that allows the solid residue 2 to be fluidly burned in the fluidized bed combustion furnace 22 of the circulating fluidized bed boiler 21. For example, the coarsely pulverized residue 23 is obtained by roughly pulverizing to about 10 mm or less. A crusher, a ball mill, or the like can be used as the coarse pulverizer 20.

  On the other hand, the liquid residue 10 such as petroleum pitch and asphalt taken out from the oil refining facility 1 is supplied to the fluidized bed combustion furnace 22 of the circulating fluidized bed boiler 21 by a liquid residue supply device 26 including a pump 24 and a liquid feeding pipe 25. Like to do. At this time, since the fluidity of the liquid residue 10 taken out from the petroleum refining facility 1 is drastically lowered due to a temperature drop, the fluidity of the liquid residue 10 is increased in the liquid residue supply device 26. A temperature holding means 27 is provided for ensuring that the fluidized bed combustion furnace 22 can be supplied satisfactorily. As the temperature holding means 27, a system in which a heat insulating material is installed outside the pump 24 and the liquid feeding pipe 25, a system in which a double pipe structure is used for heating by passing a heating fluid, or a system in which an electric heater is provided for heating. Can be adopted.

  The circulating fluidized bed boiler 21 introduces the coarsely pulverized residue 23 from the coarse pulverizer 20 and the liquid residue 10 from the liquid residue supply device 26 into the fluidized bed combustion furnace 22, and from the lower part of the fluidized bed combustion furnace 22. Fluidized combustion is performed together with the circulating particles by the supplied fluidized air 28. The combustion high-temperature fluid generated by the combustion in the fluidized bed combustion furnace 22 is guided from the upper part of the fluidized bed combustion furnace 22 to the cyclone 29 to be separated into the exhaust gas 30 and the circulating particles 31. After being supplied and stored in the storage unit 33, it is circulated and supplied to the fluidized bed combustion furnace 22 through the supply pipe 34. In the particle storage unit 33, the lower end of the downcomer 32 is inserted into the circulating particles of the particle storage unit 33 in order to prevent the combustion gas of the fluidized bed combustion furnace 22 from flowing back to the cyclone 29.

  The exhaust gas 30 separated by the cyclone 29 is guided to a subsequent boiler 35, and steam 37 is generated by a heat transfer tube 36 provided in the boiler 35. The particle reservoir 33 is also provided with a heat transfer tube 36 ′.

  The steam 37 (superheated steam) generated in the boiler 35 can be supplied to a device that requires steam in the petroleum refining facility 1 through the steam supply pipe 38 and effectively used.

  Furthermore, in the form of FIG. 1, the oil refining equipment 1 can be continuously operated even when the liquid residue supply device 26 becomes inoperable due to clogging due to solidification of the liquid residue 10 or the like. A backup device is provided. That is, as shown by a broken line in FIG. 1, the liquid residue 10 is taken out from an arbitrary position of the liquid residue supply device 26 by the take-out pipe 39, and this liquid residue 10 is supplied to the cooling and solidifying device 40 to be cooled. To solidify. Since the solid residue 10 ′ solidified by the cooling and solidifying device 40 includes a large lump, the solid residue 10 ′ is temporarily stored in the storage unit 41, and then supplied to the coarse pulverizer 20 for coarse pulverization and coarse pulverization. The residue 23 is supplied to the fluidized bed combustion furnace 22 of the circulating fluidized bed boiler 21.

  The operation of the embodiment of FIG. 1 will be described below.

  The solid residue 2 such as petroleum coke taken out from the oil refining facility 1 is temporarily stored in the storage unit 3 and then supplied to a coarse pulverizer 20 including a crusher, a ball mill, etc., and coarsely pulverized. Since the solid residue 2 includes a large lump, the solid residue 2 is roughly sized into a coarsely pulverized residue 23 having a size that can be favorably fluidized in the fluidized bed combustion furnace 22 of the circulating fluidized bed boiler 21, for example, about 10 mm or less. Smash. The coarsely pulverized residue 23 coarsely pulverized by the coarse pulverizer 20 is supplied to the fluidized bed combustion furnace 22 and is fluidly burned well.

  On the other hand, the liquid residue 10 such as petroleum pitch and asphalt taken out from the oil refining facility 1 is supplied to the fluidized bed combustion furnace 22 of the circulating fluidized bed boiler 21 by a liquid residue supply device 26 including a pump 24 and a liquid feeding pipe 25. Is done. At this time, since the liquid residue supply device 26 is provided with the temperature holding means 27, the fluidity of the liquid residue 10 taken out from the petroleum refining facility 1 is drastically lowered due to the temperature drop. The fluidized bed combustion furnace 22 is satisfactorily supplied and fluidized and burned in a state where the fluidity is always maintained. Therefore, in the fluidized bed combustion furnace 22, co-firing is performed using the coarsely pulverized residue 23 from the coarsely pulverizer 20 and the liquid residue 10 from the liquid residue supply device 26.

  Thus, since the solid residue 2 and the liquid residue 10 taken out from the oil refining equipment 1 are supplied to the single circulating fluidized bed boiler 21 and burned, the solid residue taken out from the oil refining equipment 1 is used. Even if there is a change in 2 and the liquid residue 10, the operation of the circulating fluidized bed boiler 21 can be flattened by burning them together, so that the steam 37 can be generated stably. In addition, since the solid residue 2 is stored in the storage unit 3, the solid residue 2 stored in the storage unit 3 is adjusted and supplied to the coarse pulverizer 20. The total supply amount of the petroleum refining residue to be supplied can be finely adjusted, so that the generation amount of steam can be further stabilized.

  The steam 37 (superheated steam) generated in the boiler 35 can be effectively used by supplying the steam in the petroleum refining facility 1 to a device that requires steam through the steam supply pipe 38.

  As described above, since the solid residue 2 taken out from the oil refining facility 1 is burned in the circulating fluidized bed boiler 21, the coarse pulverizer 20 can perform fluidized combustion in the fluidized bed combustion furnace 22, for example, 10 mm or less. Therefore, compared to the case of pulverizing to about 70 μm or less as in the case of burning with a conventional pulverized coal burner, the apparatus price of the pulverizer can be greatly reduced and the running cost can be reduced. It can be greatly reduced.

  Further, since the liquid residue 10 taken out from the oil refining facility 1 can be directly supplied to the circulating fluidized bed boiler 21 and burned by the liquid residue supply device 26 provided with the temperature holding means 27, the oil refining facility 1 The high temperature of about 300 ° C., for example, possessed by petroleum pitch, which is taken out of the oil, can be used as it is. Furthermore, since it is not necessary to use a large cooling and solidifying device for cooling and solidifying the liquid residue 10 during normal operation, the amount of cooling fluid (water) used can be reduced and the running cost of the coarse pulverizer 20 can be reduced. Can be reduced.

  Further, in the embodiment of FIG. 1, even when the liquid residue supply device 26 becomes inoperable due to clogging due to solidification of the liquid residue 10 and the like, since the backup device is provided, the oil refining facility 1 is continuously provided. Can be driven. That is, when the liquid residue supply device 26 becomes inoperable, the liquid residue 10 is removed from an arbitrary position of the liquid residue supply device 26 by an extraction pipe 39 as shown by a broken line in FIG. The liquid residue 10 is taken out and supplied to the cooling and solidifying device 40 to be solidified by cooling, and the solidified solid residue 10 'is temporarily stored in the storage unit 41 and then supplied to the coarse pulverizer 20. Roughly pulverized and supplied to the fluidized bed combustion furnace 22 of the circulating fluidized bed boiler 21 as a coarsely pulverized residue 23.

  By providing the backup device in this way, the operation of the oil refining facility 1 can be continued continuously.

  In addition, the processing method and apparatus of the petroleum refined residue of this invention are not limited only to the said form, Of course, it can add various changes within the range which does not deviate from the summary of this invention.

It is a schematic side view which shows an example of the apparatus which enforces the processing method of the petroleum refining residue of this invention. It is a schematic side view which shows an example of the conventional apparatus which made it burn with the pulverized coal burner of a pulverized combustion boiler the petroleum refined residue taken out from an oil refinery facility.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Petroleum refining equipment 2 Solid residue 10 Liquid residue 10 'Solid residue 20 Coarse grinder 21 Circulating fluidized bed boiler 22 Fluidized bed combustion furnace 23 Coarse grind residue 26 Liquid residue supply device 27 Temperature holding means 37 Steam 40 Cooling solidification apparatus

Claims (5)

A method for treating petroleum refining residues for treating solid and liquid residues taken out from petroleum refining equipment, wherein the solid residues are coarsely pulverized to a particle size suitable for fluid combustion and then flow in a circulating fluidized bed boiler Supplying to a bed combustion furnace, liquid residue is supplied to the fluidized bed combustion furnace of the circulating fluidized bed boiler while maintaining a fluidizing temperature, and steam is generated by co-firing to process the petroleum refining residue Method. The petroleum refining residue according to claim 1, wherein the petroleum refining residue comprises a solid residue and a liquid residue , the solid residue sand is petroleum coke, and the liquid residue is at least one of asphalt and petroleum pitch. Residue processing method.   The method for treating a petroleum refining residue according to claim 1 or 2, wherein steam generated in the circulating fluidized bed boiler is supplied to an oil refining facility and used. An apparatus for treating petroleum refining residues for treating solid and liquid residues taken out from oil refining equipment, obtained by introducing solid residues and roughly pulverizing them to a particle size suitable for fluid combustion A coarse pulverizer for supplying the coarsely pulverized residue to the fluidized bed combustion furnace of the circulating fluidized bed boiler and a temperature holding means for maintaining the liquid residue at the fluidization temperature are provided to the fluidized bed combustion furnace of the circulating fluidized bed boiler. An apparatus for processing petroleum refining residue, comprising: a liquid residue supply device.   The processing apparatus of the refined petroleum residue of Claim 4 which has a cooling solidification apparatus which takes out and cools the liquid residue of the said liquid residue supply apparatus, and guides the solid residue obtained by cooling to the said coarse crusher.

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