WO2013015275A1 - Procédé et dispositif de traitement hydrothermal - Google Patents

Procédé et dispositif de traitement hydrothermal Download PDF

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Publication number
WO2013015275A1
WO2013015275A1 PCT/JP2012/068696 JP2012068696W WO2013015275A1 WO 2013015275 A1 WO2013015275 A1 WO 2013015275A1 JP 2012068696 W JP2012068696 W JP 2012068696W WO 2013015275 A1 WO2013015275 A1 WO 2013015275A1
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WO
WIPO (PCT)
Prior art keywords
hydrothermal treatment
dehydration
dehydrating
pipe
tube
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Application number
PCT/JP2012/068696
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English (en)
Japanese (ja)
Inventor
孝司 木本
博和 坪井
幸裕 藤村
Original Assignee
メタウォーター株式会社
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Publication of WO2013015275A1 publication Critical patent/WO2013015275A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C02F11/08—Wet air oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning

Definitions

  • the present invention relates to a hydrothermal treatment method including a dehydration step and a hydrothermal treatment apparatus having a dehydration mechanism.
  • Patent Document 1 As the hydrothermal treatment in a high temperature and high pressure state, the technique described in Patent Document 1 is known.
  • Patent Document 1 a high-temperature and high-pressure treatment is performed on organic sludge to produce a slurry-like substance, and this slurry-like substance is dehydrated to recover dehydrated solids, while the water treatment purifies the separated liquid.
  • a method for treating organic sludge is disclosed.
  • a high-temperature and high-pressure treatment a batch reaction is employed in which a certain amount of organic sludge is filled into a treatment device, pressurized steam is blown, and reaction is performed for a predetermined time while heating, pressurizing, and stirring. Has been.
  • the processing apparatus which performs the high temperature / high pressure processing described in Patent Document 1 is known as a so-called hydrothermal processing apparatus.
  • this hydrothermal treatment apparatus When treating organic sludge using this hydrothermal treatment apparatus, first, the organic sludge is made into a slurry-like substance, and then this slurry-like substance is taken out from the hydrothermal treatment apparatus and supplied to the cooling device to be cooled. After that, it is finally supplied to a dehydrator and dehydrated to obtain a dehydrated cake.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a hydrothermal treatment method and a hydrothermal treatment apparatus capable of efficiently performing a dehydration process in a hydrothermal treatment apparatus having a dehydration mechanism. .
  • the hydrothermal treatment method according to the present invention is a subcritical treatment step of performing hydrothermal treatment in a subcritical atmosphere on a workpiece using water in a subcritical state. And, in a subcritical atmosphere subjected to hydrothermal treatment, the liquid component is separated from the object to be processed by applying a force directed to the outside of the object to be processed stored in the dewatering means. And a dehydration process for performing dehydration.
  • the dehydrating means comprises a dehydrating tube in which a plurality of openings capable of transmitting a gas component and a liquid component are formed at least partially.
  • the method includes a step of setting the atmospheric pressure outside the tube to less than the atmospheric pressure inside the dehydrating tube.
  • the dehydrating means comprises a dehydrating tube in which a plurality of openings capable of transmitting a gas component and a liquid component are formed at least partially.
  • the method includes a step of pressing the object to be processed toward the opening of the dehydrating tube inside the dehydrating tube by the means.
  • the hydrothermal treatment method according to the present invention in the above invention, includes a dehydration step of discharging the separated liquid component after the dehydration step, and a desorption step of reducing the atmospheric pressure of the object to be processed from a subcritical state to a predetermined pressure. And a gas step.
  • the hydrothermal treatment apparatus comprises a hydrothermal treatment means configured to be capable of hydrothermal treatment with respect to an organic workpiece using subcritical water vapor, and a liquid component from the hydrothermally treated organic workpiece.
  • a hydrothermal treatment apparatus having a dehydration treatment means configured to be capable of performing a dehydration treatment in a subcritical state, wherein the dehydration treatment means is provided inside the hydrothermal treatment means and an organic workpiece Is characterized in that the pressure can be applied from the inside of the dehydrating means to the outside of the dehydrating means.
  • the dehydration processing means is constituted by a dehydration pipe having a plurality of openings formed at least partially through which a gas component and a liquid component can be permeated.
  • the atmospheric pressure is controlled to be less than the atmospheric pressure inside the dehydrating tube.
  • the dehydrating means is composed of a dehydrating tube in which a plurality of openings capable of transmitting a gas component and a liquid component are formed at least partially, and the inside of the dehydrating tube It has the press means comprised so that an organic to-be-processed object could be pressed toward the exterior from the.
  • the hydrothermal treatment apparatus is configured such that, in the above invention, the hydrothermal treatment means has a drain means for discharging the separated liquid component from the hydrothermal treatment means, and the gas inside the hydrothermal treatment means can be exhausted. It is characterized in that the inside of the hydrothermal treatment means can be reduced to a predetermined pressure by the exhaust part.
  • the subcritical state of water means a state where the temperature is 100 ° C. or more and 374 ° C. or less and the pressure is 0.1 MPa or more and 22.1 MPa or less, and when the object is organic sludge, The temperature is 120 ° C. or higher and 200 ° C. or lower, and the pressure is 0.2 MPa or higher and 1.6 MPa or lower.
  • the dehydration process after the subcritical process can be efficiently performed in the hydrothermal treatment apparatus having a dehydration mechanism.
  • FIG. 1 is a diagram showing a hydrothermal treatment apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a flowchart showing the hydrothermal treatment method according to the first embodiment of the present invention.
  • FIG. 3 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the first embodiment of the present invention.
  • FIG. 6 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the first embodiment of the present invention.
  • FIG. 1 is a diagram showing a hydrothermal treatment apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a flowchart showing the hydrothermal treatment method according to the first embodiment of the present invention.
  • FIG. 3 is a schematic diagram for explaining the operation of the hydrothermal treatment
  • FIG. 7 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the first embodiment of the present invention.
  • FIG. 8 is a diagram showing a hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 9 is a flowchart showing a hydrothermal treatment method according to the second embodiment of the present invention.
  • FIG. 10 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 11 is a schematic diagram for explaining the stirring operation of organic sludge by the pressure stirring unit inside the dehydrating tube of the hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 12 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 12 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 13 is a schematic diagram for explaining the dewatering operation of organic sludge by the pressing and stirring unit inside the dewatering tube of the hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 14 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 15 is a schematic diagram for explaining the operation of the hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • FIG. 1 shows a hydrothermal treatment apparatus according to the first embodiment.
  • the hydrothermal treatment apparatus includes a hydrothermal treatment apparatus main body 1 and a storage tank 2.
  • the hydrothermal treatment apparatus main body 1 has an outer pipe 3, an exhaust pipe 4, an intake pipe 5, a drain pipe 6, a waste pipe 7, a fixing jig 8, a rotary translation mechanism 9, a shaft 10, and a dehydrating pipe 11.
  • the storage tank 2 is provided with an exhaust pipe 21 and a liquid supply pipe 22.
  • the drainage pipe 6 of the hydrothermal treatment apparatus body 1 and the liquid supply pipe 22 of the storage tank 2 are connected via a valve 23.
  • the outer tube 3 of the hydrothermal treatment apparatus main body 1 has a cylindrical portion and is provided so that its longitudinal direction is perpendicular to the direction of gravity.
  • a flange portion 3a is provided at one end of the cylindrical portion of the outer tube 3 on the rotary translation mechanism 9 side, and a lid portion 3b is provided at the other end.
  • the lid portion 3b is fixed to one end of the outer tube 3 opposite to the flange portion 3a by a fixing jig 8, and can be removed from the outer tube 3 by removing the fixing jig 8.
  • a dehydrating tube 11 having a cylindrical portion is provided at the upper portion along the direction of gravity, and liquid such as condensed water or separated filtrate is provided at the lower portion along the direction of gravity.
  • the space 3c in which can be stored is formed.
  • the storage capacity of the space 3c is configured to be larger than the maximum amount of liquid such as condensed water or separated filtrate stored in the outer tube 3 that is measured in advance.
  • the outer tube 3 is configured so that the stored liquid does not contact the dehydrating tube 11 even when the maximum amount of condensed water or separated filtrate is stored therein.
  • dehydrating tube 11 One end of the dehydrating tube 11 is provided with a dehydrating tube lid portion 11a that is detachable from the dehydrating tube 11 and connected to the lid portion 3b.
  • a dehydrating tube lid portion 11a that is detachable from the dehydrating tube 11 and connected to the lid portion 3b.
  • the dehydrating tube lid is also attached.
  • the part 11a can also be removed from the dehydrating tube 11.
  • a plurality of openings 11b are formed in a part of the cylindrical portion of the dehydrating tube 11.
  • the plurality of openings 11b are formed in a belt-like portion along the longitudinal direction of the dehydrating tube 11 in the cylindrical portion. Except for the belt-like portion in which these openings 11b are formed, it is a partially cylindrical curved surface in which the openings 11b are not provided.
  • a columnar piston 12 is provided along a part of the inner surface of the cylinder.
  • the piston 12 is connected to a shaft 10 penetrating the flange portion 3a and one end of the dehydrating tube 11.
  • One end of the shaft 10 is supported by the rotary translation mechanism 9, and is configured to be capable of translational movement along the longitudinal direction by the rotary translation mechanism 9, and to be capable of rotational movement about the axis of the shaft 10.
  • the piston 12 By translating the shaft 10 by the rotary translation mechanism 9, the piston 12 can be translated inside the dehydrating pipe 11.
  • the dehydrating tube 11 can be rotated about the axis coincident with the axis of the shaft 10 at the center of the cylindrical circular cross section. It is configured.
  • an open / close valve 4a for opening the inside of the outer pipe 3 to the outside air or a predetermined external device through the exhaust pipe 4 is provided at one end of the exhaust pipe 4 on the outside air side.
  • the intake pipe 5a is configured to be able to supply a gas such as water vapor to the outside of the dehydration pipe 11 inside the outer pipe 3 from a gas supply device (not shown), and the intake pipe 5b is connected to the dehydration pipe from the gas supply device.
  • 11 is configured to be able to supply a gas such as water vapor.
  • the drainage pipe 6 is a pipe for supplying the liquid inside the outer pipe 3 to the storage tank 2 through the liquid supply pipe 22 through the valve 23.
  • the waste liquid pipe 7 is a pipe for discharging the liquid inside the outer pipe 3 to the outside of the outer pipe 3 through the opening / closing valve 7a.
  • an opening / closing valve 21a for opening the inside of the storage tank 2 to outside air or a predetermined external device is provided at one end of the exhaust pipe 21 of the storage tank 2.
  • FIG. 2 shows a flowchart of the hydrothermal treatment method
  • FIGS. 3 to 7 show the operation state of the hydrothermal treatment apparatus in each step of the hydrothermal treatment method.
  • a subcritical processing step is performed (step ST1).
  • the fixing jig 8 is removed, the lid portion 3 b and the dehydrating tube lid portion 11 a are removed, and an organic material as an organic object to be processed is placed inside the dehydrating tube 11.
  • the lid portion 3b and the dehydrating tube lid portion 11a are attached, and the outer tube 3 and the lid portion 3b are tightly fixed by the fixing jig 8, and the inside of the outer tube 3 is sealed.
  • the organic sludge 31 is stored, the plurality of openings 11b formed in the band-shaped portion of the dewatering pipe 11 are positioned below the dewatering pipe 11 along the direction of gravity. Blocked.
  • a high-temperature and high-pressure atmosphere is provided through an intake pipe 5a, 5b from a steam supply mechanism (not shown) such as a boiler installed outside.
  • a steam supply mechanism such as a boiler installed outside.
  • the temperature of the water vapor supplied from the water vapor supply mechanism is 133 ° C. or higher and 212 ° C. or lower, specifically 210 ° C., for example.
  • the inside of the outer pipe 3 and the inside of the dehydrating pipe 11 are filled with water vapor in a high temperature and high pressure atmosphere in a subcritical state.
  • the rotating translation mechanism 9 swings the shaft 10 about its axis, thereby swinging the dehydrating tube 11.
  • the organic sludge 31 inside the dewatering pipe 11 is agitated, and water vapor is spread throughout the organic sludge 31, so that the subcritical process is performed on the organic sludge 31.
  • the supplied water vapor is condensed in the space 3 c of the outer tube 3 to store the condensed water 32.
  • the dewatering pipe 11 is not immersed in the condensed water 32, and the organic sludge 31 is not immersed in the condensed water 32, so that the condensed water 32 and the organic sludge 31 are in a non-contact state. Maintained. Therefore, since the organic matter contained in the organic sludge 31 can be prevented from leaking into the condensed water 32, the condensed water 32 can be kept relatively clean.
  • a condensed water draining step is performed (step ST2).
  • the valve 23 is opened and kept open while the inside of the outer tube 3 is maintained in a subcritical high temperature and high pressure atmosphere.
  • atmospheric pressure acts on the condensed water 32 by the high-pressure atmosphere inside the outer pipe 3, and the condensed water 32 is rapidly supplied from the outer pipe 3 to the storage tank 2 through the drain pipe 6 and the liquid supply pipe 22.
  • the condensed water 32 generated inside the outer pipe 3 is not in contact with the organic sludge 31, it is supplied to the storage tank 2 while being clean.
  • the valve 23 since the valve 23 is in an open state, when the condensed water 32 inside the outer pipe 3 is supplied to the storage tank 2, the atmosphere inside the storage tank 2 is as high as the inside of the outer pipe 3. High pressure atmosphere.
  • a dehydration process is performed (step ST3).
  • the valve 23 is closed to a closed state.
  • the open / close valve 4a of the exhaust pipe 4 and the open / close valve 21a of the exhaust pipe 21 are opened to be opened.
  • the steam outside the dehydration pipe 11 and the steam inside the storage tank 2 are released to the outside inside the outer pipe 3, and the pressure inside the outer pipe 3 and the storage tank 2 gradually increases to a predetermined pressure, for example, a large pressure. Depressurized to atmospheric pressure.
  • the steam discharged through the opening / closing valve 4a or the opening / closing valve 21a is discharged to the outside air or supplied to a predetermined external device as necessary.
  • a plurality of openings 11b provided in a strip shape at the bottom are closed by the organic sludge 31, and the inside of the dehydrating pipe 11 is formed by the organic sludge 31 and the upper partial cylindrical curved surface.
  • a sealed closed space is maintained and a high-temperature and high-pressure atmosphere is maintained.
  • a pressure difference is generated between the high-pressure atmosphere inside the dehydrating tube 11 and the atmospheric pressure outside the dehydrating tube 11. Due to this pressure difference, pressure is applied to the organic sludge 31 from the inside of the dewatering pipe 11 to the outside, and the dewatering process is performed.
  • the organic sludge 31 When the organic sludge 31 is compressed inside the dewatering tube 11, liquid components such as moisture contained in the organic sludge 31 are discharged into the outer tube 3 as the separated filtrate 33 through the opening 11 b of the dewatering tube 11. The Thereby, the separated filtrate 33 is stored at the bottom of the outer tube 3.
  • the storage capacity of the space 3c is configured to be larger than the maximum amount of the separated filtrate 33 generated inside the outer tube 3, the separated filtrate 33 and the organic sludge 31 stored in the space 3c are separated from each other. You can avoid contact.
  • the viscosity of the liquid water contained in the organic sludge 31 is lowered by the high temperature and high pressure atmosphere in the subcritical state. Therefore, in the dewatering of the organic sludge 31, the dewaterability by compression can be improved, and the high temperature and high pressure state can be effectively utilized in the dewatering process.
  • the shaft 10 is rotated halfway by the rotary translation mechanism 9, and the dehydrating tube 11 is reversed so that the plurality of openings 11b provided in a strip shape are positioned on the upper side in the direction of gravity.
  • the organic sludge 31 is moved to the partial cylindrical curved surface side positioned on the lower side by gravity, the opening 11b is unblocked, and the dehydration pipe 11 is opened through the openings 11b.
  • the internal high-pressure atmosphere is reduced to the atmospheric pressure inside the outer tube 3.
  • a separation filtrate draining step is performed (step ST4).
  • the dehydrating tube 11 is opened by opening the on-off valve 7a while maintaining the plurality of openings 11b provided in the strip shape on the upper side.
  • the separated filtrate 33 is discharged from the outer tube 3. Further, the opening / closing valve 21a is closed as necessary.
  • step ST5 an extraction process is performed (step ST5).
  • the open / close valve 7a is closed to close the outer tube 3 by closing it.
  • the fixing jig 8 is removed from the outer tube 3 and the lid portion 3b, the lid portion 3b is removed from the outer tube 3, and the dehydrating tube lid portion 11a is removed from the dehydrating tube 11.
  • the shaft 10 is pushed inwardly in the outer tube 3 by the rotary translation mechanism 9 (in the pushing direction in FIG. 7), so that the dehydrated cake of the organic sludge 31 that has been compressed and dehydrated is formed inside the dewatering tube 11. Extruded from.
  • the dewatered cake of the organic sludge 31 is subjected to a landfill process or the like as necessary.
  • the pressure inside the outer tube 3 is gradually reduced to atmospheric pressure, while the opening 11 b is blocked by the organic sludge 31 in the dehydrating tube 11.
  • the dewatering pipe 11 is closed and sealed, and the high temperature and high pressure atmosphere is maintained, so that the pressure between the dehydrating pipe 11 in the high temperature and high pressure atmosphere and the atmospheric pressure outside the dehydrating pipe 11 is reduced.
  • the atmospheric pressure acts on the organic sludge 31 from the inside of the dehydrating pipe 11 to the outside to perform the dehydrating process, so that the high-temperature and high-pressure atmosphere of water vapor can be used for the dehydrating process, Dehydration efficiency can be improved.
  • the dehydration by compression can be improved, and the dehydration process can be performed at a high temperature.
  • the high pressure state can be used more effectively.
  • FIG. 8 shows a hydrothermal treatment apparatus according to the second embodiment of the present invention.
  • the hydrothermal treatment apparatus includes a hydrothermal treatment apparatus main body 1 and a storage tank 2.
  • the hydrothermal treatment apparatus main body 1 has an outer pipe 3, an exhaust pipe 4, an intake pipe 5, a drain pipe 6, a waste pipe 7, a fixing jig 8, a rotary translation mechanism 9, a shaft 10, and a dehydrating pipe 11.
  • the storage tank 2 is provided with an exhaust pipe 21 and a liquid supply pipe 22.
  • the drainage pipe 6 of the hydrothermal treatment apparatus body 1 and the liquid supply pipe 22 of the storage tank 2 are connected via a valve 23.
  • the outer tube 3 of the hydrothermal treatment apparatus main body 1 has a cylindrical portion, and a flange portion 3a is provided at one end of the cylindrical portion on the rotary translation mechanism 9 side, and a lid portion 3b is provided at the other end. Is provided.
  • the lid portion 3b is fixed to one end of the outer tube 3 opposite to the flange portion 3a by a fixing jig 8, and can be removed from the outer tube 3 by removing the fixing jig 8.
  • the dehydrating tube 11 provided inside the outer tube 3 has a cylindrical portion along the outer tube 3, and a plurality of openings 11b are formed in the cylindrical portion.
  • a dehydrating tube lid portion 11a that is detachably attached to the dehydrating tube 11 and connected to the lid portion 3b is provided. Since the dehydrating tube lid 11a is connected to the lid 3b as described above, when the lid 3b is removed from the outer tube 3, the dehydrating tube lid 11a can also be removed from the dehydrating tube 11. In addition, you may comprise separately, without connecting the cover part 3b and the dehydration pipe
  • the pressing and stirring unit 13 includes a dewatering blade unit 13a and a feed stirring blade unit 13b.
  • the dewatering blade portion 13a is formed of a cylindrical portion having a cylindrical shape along the dehydrating tube 11 along the longitudinal direction thereof, and the feed stirring blade portion 13b is a spiral whose outer periphery is along the inner surface of the cylinder of the dewatering tube 11.
  • the shape is a substantially semicircular shape, and a spiral blade portion is formed by dividing a spiral portion along the radial direction (see FIGS. 10 and 12).
  • the shaft 10 passes through one end of the flange portion 3 a and the dehydrating tube 11 and serves as the shaft of the pressing and agitating portion 13.
  • the shaft 10 is supported at one end by a rotary translation mechanism 9, and is configured to be capable of rotating around the axis by the rotary translation mechanism 9. Then, by rotating the shaft 10 about the axis by the rotation translation mechanism 9, the pressure stirring unit 13 inside the dehydrating tube 11 is configured to be rotatable about the axis of the shaft 10.
  • an open / close valve 4a for opening the inside of the outer pipe 3 to the outside air or a predetermined external device through the exhaust pipe 4 is provided at one end of the exhaust pipe 4 on the outside air side.
  • the intake pipe 5 is configured to be able to intake water vapor from a water vapor supply device (not shown).
  • the drain pipe 6 is provided on the bottom side of the outer pipe 3 and is a pipe for supplying the liquid inside the outer pipe 3 to the storage tank 2 through the liquid supply pipe 22 via the valve 23.
  • the waste liquid pipe 7 is provided on the bottom side of the outer pipe 3 and is a pipe for discharging the liquid inside the outer pipe 3 to the outside of the outer pipe 3 through the opening / closing valve 7a.
  • an opening / closing valve 21a for opening the inside of the storage tank 2 to outside air or a predetermined external device is provided at one end of the exhaust pipe 21 of the storage tank 2.
  • FIG. 9 shows a flowchart of the hydrothermal treatment method
  • FIGS. 10 to 15 show the operation of the hydrothermal treatment apparatus in the hydrothermal treatment method.
  • a subcritical processing step is performed (step ST11).
  • the fixing jig 8 is removed, the lid portion 3 b and the dehydrating tube lid portion 11 a are removed, and an organic material as an organic object to be processed is placed inside the dehydrating tube 11.
  • the lid portion 3b and the dehydrating tube lid portion 11a are closed, and the outer tube 3 and the lid portion 3b are tightly fixed by the fixing jig 8, and the inside of the outer tube 3 is sealed.
  • the valve 23 is opened to be in the open state, and the outer tube 3 and the inside of the storage tank 2 are communicated. Thereafter, steam in a high-temperature and high-pressure atmosphere in a subcritical state is supplied to the inside of the outer pipe 3 through the intake pipe 5 from a steam supply device (not shown) such as a boiler installed outside, and the storage tank 2 Similarly, water vapor in a high temperature and high pressure atmosphere is supplied.
  • a steam supply device not shown
  • water vapor in a high temperature and high pressure atmosphere is supplied.
  • the temperature of water vapor supplied from the water vapor supply mechanism is 133 ° C. or higher and 212 ° C. or lower, specifically 210 ° C., for example.
  • the inside of the outer tube 3 is filled with water vapor in a high temperature and high pressure atmosphere in the subcritical state, and the water vapor also flows into the dehydration tube 11 through the opening 11b, and is filled with water vapor in the high temperature and high pressure atmosphere in the subcritical state. It is.
  • the rotary translation mechanism 9 reciprocally swings the shaft 10 about its axis in the range of 180 ° C. to 270 ° C., and as shown in FIG.
  • the part 13 b is swung to stir the organic sludge 31, and water vapor spreads throughout the organic sludge 31. Thereby, the subcritical process with respect to the organic sludge 31 is performed.
  • the supplied water vapor is condensed to form condensed water 32, and this condensed water 32 flows to the bottom of the outer tube 3 by gravity.
  • the condensed water 32 that has flowed to the bottom of the outer pipe 3 is supplied to the storage tank 2 through the drainage pipe 6, the valve 23, and the liquid supply pipe 22 in a high-pressure atmosphere.
  • the condensed water 32 generated inside the outer pipe 3 is supplied to the storage tank 2 in a relatively clean state without contacting the organic sludge 31 during the subcritical treatment process.
  • a subcritical dehydration step is performed (step ST12).
  • this subcritical dehydration step as shown in FIG. 12, while the outer tube 3 and the dehydration tube 11 are filled with water vapor in a high temperature and high pressure atmosphere in the subcritical state, the shaft 10 is moved by the rotary translation mechanism 9. Turn halfway to center. Then, as shown in FIG. 13, the dewatering blade portion 13 a of the pressure stirring unit 13 presses the organic sludge 31 toward the cylindrical portion of the dewatering tube 11.
  • the separated filtrate 33 can be discharged outside without contacting the organic sludge 31, and the separated filtrate 33 can be prevented from entering the organic sludge 31 again. This can be further improved. Moreover, since the viscosity of the water
  • a deaeration process is performed (step ST13).
  • the on-off valve 7a is closed to a closed state.
  • the open / close valve 4a of the exhaust pipe 4 is opened to be in an open state.
  • pipe 3 is discharge
  • the storage tank 2 is opened by opening the opening / closing valve 21a.
  • steam of the high temperature / high pressure atmosphere inside the storage tank 2 is discharge
  • the steam discharged through the opening / closing valve 4a or the opening / closing valve 21a is discharged to the outside air or supplied to a predetermined external device as necessary.
  • an extraction process is performed (step ST14).
  • this extraction step as shown in FIG. 15, first, the open / close valves 4a and 21a are closed and closed to close the outer tube 3 and the storage tank 2.
  • the fixing jig 8 is removed from the outer tube 3 and the lid portion 3b, the lid portion 3b is removed from the outer tube 3, and the dehydrating tube lid portion 11a is removed from the dehydrating tube 11.
  • the rotary translation mechanism 9 rotates the shaft 10 around the axis in a predetermined rotation direction so that the feed stirring blade portion 13b of the press stirring portion 13 sends out the organic sludge 31.
  • the feeding by the feed stirring blade portion 13b and the pressing toward the outside of the dewatering pipe 11 by the dewatering blade portion 13a shown in FIG. 13 are sequentially repeated with respect to the dehydrated organic sludge 31.
  • the dehydrated cake of the organic sludge 31 that has been compressed and dehydrated is discharged from the dehydration pipe 11 by the action of the feed stirring blade portion 13 b.
  • the dewatered cake of the organic sludge 31 is subjected to a landfill process as necessary.
  • the organic sludge 31 to be newly treated is accommodated in the dewatering pipe 11 and the above-described steps ST11 to ST14 are performed to continue the hydrothermal treatment of the organic sludge.
  • the dehydrating tube 11 is provided inside the outer tube 3
  • the press stirring unit 13 is provided inside the dehydrating tube 11, and the press stirring unit 13 is formed in a cylindrical shape.
  • the dewatering blade portion 13a and the spiral feed stirring blade portion 13b By rotating the pressure stirring portion 13, the organic sludge 31 is stirred in the subcritical process and the organic property in the dewatering process. Since the sludge 31 can be pressed and compressed, the two treatments for the organic sludge 31 can be performed by one member, and the hydrothermal treatment and the dehydration treatment that are conventionally configured separately are the same hydrothermal treatment. This can be performed by the apparatus main body 1.
  • the hydrothermal treatment and the dehydration treatment can be performed continuously in the same hydrothermal treatment apparatus main body 1, it is possible to save space in the treatment system for the organic sludge 31, and at a high temperature and high pressure atmosphere in the hydrothermal treatment Can be effectively used for the dehydration treatment, and the dehydration efficiency can be further improved.
  • steam in a high-temperature and high-pressure atmosphere is introduced into the inside of the outer pipe 3 and the inside of the dehydrating pipe 11 through the two intake pipes 5a and 5b.
  • the method is not limited. That is, when one intake pipe 5 is used and water vapor in a high-temperature and high-pressure atmosphere is introduced into the outer pipe 3, first, a plurality of openings 11 b in which a dehydrating pipe 11 is provided in a strip shape by the shaft 10 is positioned above. Rotate half a turn. Thereby, the water vapor inside the outer pipe 3 flows into the dehydrating pipe 11 through the opening 11b, and the inside of the dehydrating pipe 11 also becomes a high temperature and high pressure atmosphere.
  • the dehydrating tube 11 is half-rotated by the shaft 10 so that the plurality of openings 11b provided in a strip shape are positioned below, and the opening 11b is closed by the organic sludge 31 moved by gravity, thereby dehydrating the tube 11
  • the interior of is a closed space.
  • the inside of the outer pipe 3 and the inside of the dehydrating pipe 11 may be spatially separated so that the inside of the dehydrating pipe 11 is maintained in a high-temperature and high-pressure atmosphere.
  • the two intake pipes 5a and 5b may be controlled independently of each other, and the temperature and pressure of water vapor introduced into the inside of the outer pipe 3 and the inside of the dehydrating pipe 11 may be controlled independently. .
  • the dehydrating blade 13a in the pressure stirring unit 13 is integrally formed as a cylindrical partial band, but is not necessarily limited thereto, and the dewatering blade 13a is not necessarily limited thereto. It is also possible to divide the belt-shaped portion constituting the plurality of belt-shaped portions perpendicular to the longitudinal direction. Moreover, in the feed stirring blade portion 13b of the press stirring portion 13, the spiral shape is formed into a semicircle, and is divided into a plurality of blade portions along the semicircular diameter direction. It is also possible to configure the spiral shape as a semicircle without being divided in this manner.
  • the hydrothermal treatment apparatus is installed in a so-called horizontal type (sideways) in which the longitudinal directions of the outer tube 3 and the dehydrating tube 11 are perpendicular to gravity.
  • horizontal type sideways
  • vertical type vertical placement
  • the dehydration method in the first embodiment described above may be applied to the dehydration process in the second embodiment, and the dehydration method in the second embodiment is applied to the dehydration process in the first embodiment. May be.
  • the present invention can be applied to a hydrothermal treatment method having a dehydration step and a dehydration step, and a hydrothermal treatment apparatus having a dehydration mechanism and a dehydration mechanism, and in particular, hydrothermal treatment for treating an object to be treated in a subcritical atmosphere. It can be applied to the method and hydrothermal treatment apparatus.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Selon la présente invention, un tube de déshydratation (11), sur lequel une pluralité d'ouvertures (11b) sont formées au niveau d'une section en forme de bande, est disposé à l'intérieur d'un tube externe (3) d'un corps principal de dispositif de traitement hydrothermal (1). Une section d'ouverture (11b) est occluse par une boue organique (31), séparant de façon spatiale l'intérieur du tube de déshydratation (11) et l'intérieur du tube externe (3), et de la vapeur dans un état sous-critique est fournie à l'intérieur du tube externe (3) et du tube de déshydratation (11). L'intérieur du tube externe (3) est ouvert, effectuant une dépressurisation à la pression atmosphérique, un différentiel de pression est généré entre l'intérieur du tube de déshydratation (11) et l'intérieur du tube externe (3), et une déshydratation est effectuée, provoquant l'action de la pression ambiante de l'intérieur vers l'extérieur du tube de déshydratation (11) sur la boue organique (31). En variante, une déshydratation peut également être effectuée à l'aide d'une unité de pression/agitation (13) qui présente : une section d'aube d'agitation d'alimentation (13b) qui divise une forme hélicoïdale dans la direction radiale en une forme semi-circulaire ; une section d'aube de déshydratation (13a) qui présente une forme tubulaire sous une forme de bande le long de la direction de la longueur.
PCT/JP2012/068696 2011-07-25 2012-07-24 Procédé et dispositif de traitement hydrothermal WO2013015275A1 (fr)

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JP6197997B2 (ja) * 2013-09-26 2017-09-20 フジムラインベント株式会社 水熱処理装置

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JPH01224199A (ja) * 1988-03-02 1989-09-07 Ebara Infilco Co Ltd 圧搾方法及びその装置
JPH11138198A (ja) * 1997-11-06 1999-05-25 Hitachi Ltd 超臨界流体を用いた有機物酸化処理装置及び処理方法
JP2007203213A (ja) * 2006-02-02 2007-08-16 Nishimuragumi:Kk 高湿潤廃棄物の脱水前処理方法、脱水前処理装置およびこれを備えた脱水処理システム
WO2008038361A1 (fr) * 2006-09-28 2008-04-03 Eco Material Co., Ltd. système d'élimination des déchets organiques
JP2008246300A (ja) * 2007-03-29 2008-10-16 Tokyo Institute Of Technology 廃棄物処理装置及び廃棄物処理方法
JP2009119378A (ja) * 2007-11-15 2009-06-04 Kurimoto Ltd 有機性廃棄物のメタン発酵処理方法及びメタン発酵処理システム
JP2009232747A (ja) * 2008-03-27 2009-10-15 National Univ Corp Shizuoka Univ ペーパースラッジ由来の水溶性糖類製造装置およびペーパースラッジ由来の水溶性糖類製造方法

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JPS5554098A (en) * 1978-10-18 1980-04-21 Ebara Infilco Co Ltd Dehydrating method for sludge

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01224199A (ja) * 1988-03-02 1989-09-07 Ebara Infilco Co Ltd 圧搾方法及びその装置
JPH11138198A (ja) * 1997-11-06 1999-05-25 Hitachi Ltd 超臨界流体を用いた有機物酸化処理装置及び処理方法
JP2007203213A (ja) * 2006-02-02 2007-08-16 Nishimuragumi:Kk 高湿潤廃棄物の脱水前処理方法、脱水前処理装置およびこれを備えた脱水処理システム
WO2008038361A1 (fr) * 2006-09-28 2008-04-03 Eco Material Co., Ltd. système d'élimination des déchets organiques
JP2008246300A (ja) * 2007-03-29 2008-10-16 Tokyo Institute Of Technology 廃棄物処理装置及び廃棄物処理方法
JP2009119378A (ja) * 2007-11-15 2009-06-04 Kurimoto Ltd 有機性廃棄物のメタン発酵処理方法及びメタン発酵処理システム
JP2009232747A (ja) * 2008-03-27 2009-10-15 National Univ Corp Shizuoka Univ ペーパースラッジ由来の水溶性糖類製造装置およびペーパースラッジ由来の水溶性糖類製造方法

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