JP2010194390A - Method for removing sludge in crude oil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the work of removing oil-containing sludge accumulated at the bottom part of a primary storage tank of crude oil, a conveying means and a secondary storage tank of the crude oil, etc., or to reduce the labor. <P>SOLUTION: The method for removing sludge in crude oil includes: a crude oil filtration process of installing a screw type strainer for a crude oil transport pipe in the middle of the crude oil transport pipe for transporting the crude oil from a crude oil excavation well, supplying the crude oil from the crude oil supply port of the strainer for the crude oil transport pipe, filtering the crude oil, discharging the filtered crude oil from a crude oil discharge port and discharging the oil-containing sludge inside an inner cylinder from an oil-containing sludge discharge port; and an oil recovery process of separating oil from the oil-containing sludge and recovering the oil. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for removing sludge in crude oil using a strainer for a crude oil transportation pipe installed in the middle of a crude oil transportation pipe for transporting crude oil and removing sludge in the crude oil.

  Crude oil drilled from a crude oil drilling well is usually transported and stored in a primary storage tank (oil producing country or oil production site) of crude oil by a crude oil transport pipe. Since the crude oil drilled from this drilling well contains several percent sludge, when such crude oil is stored in the primary storage tank of crude oil, oil-containing sludge (hereinafter referred to as oil-containing sludge) is also stored. To settle down to the bottom of the crude oil tank.

  And if the amount of oil-containing sludge that settled at the bottom of the primary storage tank of crude oil increases, in order to remove the oil-containing sludge that has accumulated at the bottom of the tank, after washing the tank, carrying out the residual sludge, The residue sludge carried out had to be disposed of as industrial waste.

  The crude oil once stored in the primary storage tank of the crude oil is then transported by a transport means such as a tanker and stored again in the secondary storage tank (consumer country or consumption place) of the transport destination crude oil. Since the sludge in the crude oil does not completely settle when stored in the primary storage tank of the crude oil, the oil-containing sludge also settles at the bottom of the tanker or the secondary storage tank of the crude oil.

  Therefore, in the case of a tanker or a secondary storage tank for crude oil, the oil-containing sludge accumulated at the bottom had to be removed.

  It takes a lot of labor to remove the oil-containing sludge accumulated at the bottom of the primary storage tank of crude oil, secondary storage tank of crude oil, transportation means, etc., and the primary storage tank of crude oil, transportation means and secondary storage of crude oil Since it was necessary to perform the same operation in each of the tanks and the like, it was extremely inefficient.

  Accordingly, an object of the present invention is to eliminate or reduce the labor of removing oil-containing sludge accumulated at the bottom of a primary storage tank of crude oil, a transportation means, a secondary storage tank of crude oil, and the like.

That is, the present invention (1) is a screw comprising a screw shaft and a screw blade spirally provided on the outer periphery of at least a part of the screw shaft in the middle of a crude oil transport pipe for transporting crude oil from a crude oil drilling well. An inner cylinder having a crude oil passage hole, surrounding the screw, an outer cylinder installed outside the inner cylinder and forming a crude oil discharge gap between the inner cylinder, and an inner cylinder The crude oil supply port for supplying the crude oil, and a stopper for adjusting the discharge of the oil-containing sludge installed in the vicinity of the cylinder end of the inner cylinder on the oil-containing sludge discharge side, and discharged into the crude oil discharge gap A crude oil discharge port for discharging crude oil to the outside of the apparatus, an oil-containing sludge discharge port for discharging the oil-containing sludge discharged from the inner cylinder to the outside of the apparatus, and drive means for rotating the screw; For crude oil transportation pipes A trainer is installed, the crude oil is supplied from the crude oil supply port of the crude oil transport pipe strainer, the crude oil is filtered, the filtered crude oil is discharged from the crude oil outlet, and the oil-containing sludge in the inner cylinder is removed. Crude oil filtration process discharged from oil-impregnated sludge outlet,
An oil recovery step of separating the oil from the oil-containing sludge and recovering the oil;
The present invention provides a method for removing sludge in crude oil, characterized in that

  ADVANTAGE OF THE INVENTION According to this invention, the operation | work which removes the oil-containing sludge collected in the bottom parts, such as a primary storage tank of crude oil, a conveyance means, and a secondary storage tank of crude oil, can be eliminated, or the labor can be reduced.

It is typical sectional drawing which shows the 1st form example of the strainer for crude oil transport pipes used for the removal method of the sludge in the crude oil of this invention. It is typical sectional drawing which shows the 1st form example of the strainer for crude oil transport pipes used for the removal method of the sludge in the crude oil of this invention. It is a side view of the screw in FIG.1 and FIG.2. It is a figure which shows the positional relationship of the cylinder end and stopper of the oil-containing sludge discharge | emission side of the inner cylinder in FIG. FIG. 3 is a schematic cross-sectional view of the crude oil transport pipe strainer showing how crude oil is filtered using the crude oil transport pipe strainer of FIGS. 1 and 2. It is a schematic diagram which shows the form example of the removal system of the sludge in crude oil for implementing the removal method of the sludge in crude oil of this invention. It is typical sectional drawing of the processing apparatus of a screw type oil-containing sludge. It is typical sectional drawing of the processing apparatus of a screw type oil-containing sludge. It is a side view of the screw (B) in FIG.7 and FIG.8. It is sectional drawing which described the inner cylinder (B) and outer cylinder (B) of FIG. It is typical sectional drawing of the processing apparatus 131 of this screw type oil-containing sludge which shows a mode that the processing operation of oil-containing sludge is performed using the processing apparatus 131 of a screw type oil-containing sludge. It is sectional drawing of the oil-water separator 61.

In the method for removing sludge in crude oil of the present invention, a strainer for a crude oil transport pipe according to the method for removing sludge in crude oil of the present invention is installed in the middle of a crude oil transport pipe for transporting crude oil from a crude oil drilling well. A crude oil filtration step of supplying crude oil through a crude oil supply port, filtering the crude oil, discharging the filtered crude oil from the crude oil discharge port, and discharging oil-containing sludge in the inner cylinder from the oil-containing sludge discharge port;
An oil recovery step of separating the oil from the oil-containing sludge and recovering the oil;
This is a method for removing sludge in crude oil.

A crude oil transport pipe strainer according to the method for removing sludge in crude oil of the present invention,
A screw (A) consisting of a screw shaft (A) and a screw blade (A) spirally provided on the outer periphery of at least a part of the screw shaft (A);
An inner cylinder (A) having a crude oil passage hole and surrounding the screw;
An outer cylinder (A) that is installed outside the inner cylinder (A) and forms a crude oil discharge gap with the inner cylinder (A);
A crude oil supply port for supplying crude oil into the inner cylinder (A),
A stopper (A) installed near the end of the inner cylinder (A) on the oil-impregnated sludge discharge side for adjusting the discharge of the oil-containing sludge;
A crude oil outlet for discharging the crude oil discharged into the crude oil discharge gap;
An oil-containing sludge discharge port for discharging the oil-containing sludge discharged from the inner cylinder (A) to the outside of the apparatus;
Drive means for rotationally driving the screw (A);
It is a strainer for crude oil transportation pipes.

  A crude oil transport pipe strainer according to the method for removing sludge from crude oil according to the present invention will be described with reference to FIGS. 1 and 2 are schematic cross-sectional views showing a strainer for a crude oil transport pipe according to the method for removing sludge in crude oil according to the present invention. FIG. 1 is a cross-sectional view taken along a plane parallel to the moving direction of oil-containing sludge. FIG. 2 is a cross-sectional view taken along a plane perpendicular to the moving direction of the oil-containing sludge. FIG. 3 is a side view of the screw in FIGS. 1 and 2. 1 and 2, a crude oil transport pipe strainer 1 includes a screw (A) 4, an inner cylinder (A) 5 surrounding the screw (A) 4, and an outer side of the inner cylinder (A) 5. The outer cylinder (A) 6 installed so as to form a crude oil discharge gap 22 for discharging the filtered crude oil between the cylinder (A) 5 and the oil content of the inner cylinder (A) 5 A stopper 7 (A) installed in the vicinity of the cylinder end 18 on the sludge discharge side, a crude oil supply side flange 8 installed on the crude oil supply side of the inner cylinder (A) 5 and the outer cylinder (A) 6, An oil-impregnated sludge discharge side flange 9 installed so as to form an oil-impregnated sludge discharge chamber 14 on the oil-impregnated sludge discharge side of the inner cylinder (A) 5 and the outer cylinder (A) 6, and the inner cylinder (A) 5 A crude oil supply port 10 for supplying crude oil inside and an outer cylinder side for supplying steam or washing water into the outer cylinder (A) 6 Steam or washing water supply port 11, oil-containing sludge discharge port 12 for discharging oil-containing sludge from the oil-containing sludge discharge chamber 14 to the outside of the apparatus, and filtered crude oil discharged into the crude oil discharge gap 22, And a crude oil outlet 13 for discharging out of the apparatus.

  As shown in FIG. 3, the screw (A) 4 includes a screw shaft (A) 2 and a screw blade (A) 3. The screw blade (A) 3 is provided in a spiral shape on the outer periphery of at least a part of the screw shaft (A) 2. The screw shaft (A) 2 is rotatably fixed to the crude oil supply side flange 8 and the oil-containing sludge discharge side flange 9.

  When the screw (A) 4 rotates, the oil-impregnated sludge remaining in the inner cylinder (A) 5 after being filtered by the inner cylinder (A) 5 is removed from the oil-impregnated oil in the inner cylinder (A) 5. It is a member for moving to the sludge discharge side.

  The screw blade (A) 3 is formed in a spiral shape on the outer periphery of the screw shaft (A) 2 and is filtered by the inner cylinder (A) 5 when the screw (A) 4 rotates. The oil-containing sludge in the inner cylinder (A) 5 separated from the crude oil is not particularly limited as long as the oil-containing sludge can be moved from the crude oil supply side to the oil-containing sludge discharge side.

  The diameter 25 of the screw blade (A) 3 may be the same length as the inner diameter of the inner cylinder (A) 5, or may be slightly smaller than the inner diameter of the inner cylinder (A) 5. When the diameter 25 of the screw blade (A) 3 is smaller than the inner diameter of the inner cylinder (A) 5, the clearance between the screw blade (A) 3 and the inner cylinder (A) 5 is usually 1 mm or less, The thickness is preferably 0.5 mm or less, particularly preferably 0.1 mm or less.

  The ratio (reference numeral 26 / reference numeral 25) of the pitch 26 of the screw blade (A) 3 to the diameter 25 of the screw blade (A) 3 is 0.25 to 1.25, preferably 0.75 to 1.0, Especially preferably, it is 0.9-1.0. In the present invention, the pitch 26 of the screw blade (A) 3 is the distance between the apexes 261a and 261b of the screw blade (A) 3 in FIG. 3, that is, the screw blade (A) 3 is viewed from the side. The distance between the vertices of adjacent blades.

  The pitch 26 of the screw blade (A) 3 may be the same or different over the entire range of the screw blade (A) 3.

  In the present invention, the shape of the screw (A) 4 is not limited to the shape shown in FIGS. 1 and 3. For example, the diameter of the screw shaft increases toward the oil-containing sludge discharge side. And those having a pitch that decreases toward the discharge side of the oil-containing sludge.

  The inner cylinder (A) 5 is for filtering crude oil and filtering sludge in the crude oil.

  The inner cylinder (A) 5 has a cylindrical shape. A cylinder end 19 on the crude oil supply side of the inner cylinder (A) 5 is fixed to the crude oil supply side flange 8, and the cylinder end 19 is closed by the crude oil supply side flange 8. On the other hand, the cylinder end 18 on the oil-containing sludge discharge side of the inner cylinder (A) 5 is fixed to the oil-containing sludge discharge-side flange 9, and the opening of the cylinder end 18 is connected to the oil-containing sludge discharge chamber 14. Yes. That is, the cylinder end 18 is opened so that the oil-containing sludge is discharged out of the inner cylinder (A) 5.

  In the cylinder wall of the inner cylinder (A) 5, crude oil is filtered, sludge in the crude oil is filtered off, and the crude oil passage hole ( (Not shown).

  The cylinder wall of the inner cylinder (A) 5 is not particularly limited as long as it has a passage hole for the crude oil. Examples of the cylinder wall of the inner cylinder (A) 5 include a wire mesh and punching Examples thereof include a plate material in which holes such as metal are punched out, a screen wire mesh, and the like.

  The diameter of the passage hole for the crude oil formed in the cylindrical wall of the inner cylinder (A) 5 is appropriately selected depending on the size of the sludge in the crude oil to be treated. , Preferably 0.2 to 0.4 mm, particularly preferably 0.2 to 0.3 mm. When the cylinder wall of the inner cylinder (A) 5 is a wire mesh, the diameter of the passage hole for the crude oil indicates the mesh opening length of the wire mesh, and the cylinder wall of the inner cylinder (A) 5 is In the case of screen wire mesh, it refers to the length of the screen mesh.

  The sludge filtered from the crude oil remains in the inner cylinder (A) 5 as oil-containing sludge containing oil.

  The outer cylinder (A) 6 has a cylindrical shape. A cylinder end 20 on the crude oil supply side of the outer cylinder (A) 6 is fixed to the crude oil supply side flange 8, and the cylinder end 20 is closed by the crude oil supply side flange 8. On the other hand, the cylinder end 21 on the oil-impregnated sludge discharge side of the outer cylinder (A) 6 is fixed to the oil-impregnated sludge discharge-side flange 9, and the crude oil discharge gap 22 and the oil-containing sludge discharge chamber 14 are It is isolated by the oil-containing sludge discharge side flange 9. That is, the crude oil discharge gap 22 is blocked by the oil-containing sludge discharge side flange 9 so that the filtered crude oil discharged into the crude oil discharge gap 22 does not flow into the oil-containing sludge discharge chamber 14. Yes.

  The width of the crude oil discharge gap 22 formed by the inner cylinder (A) 5 and the outer cylinder (A) 6, in other words, the outer side of the inner cylinder (A) 5 and the outer cylinder (A) 6 The distance from the inner side is not particularly limited as long as the filtered crude oil is discharged and can flow to the crude oil outlet 13.

  In addition, in FIG.1 and FIG.2, although the shape of this outer cylinder (A) 6 has shown that the cross-sectional shape when cut by a surface perpendicular | vertical with respect to the moving direction of oil-containing sludge is circular, The shape of the outer cylinder (A) 6 is not limited to this, and the inner cylinder (A) 5 can be installed on the inner side, and crude oil is discharged and flows to the crude oil outlet 13. What is necessary is just to be able to form the discharge gap. In addition, as the shape of the outer cylinder (A), for example, the outer cylinder (A) has a flat top and a rounded bottom. Further, the cylindrical wall at the bottom of the outer cylinder (A) may be inclined toward the crude oil discharge port 13.

  The stopper (A) 7 is attached to the screw shaft (A) 2 and is installed in the vicinity of the cylinder end 18 on the oil-containing sludge discharge side of the inner cylinder (A) 5. When the crude oil is being filtered, the stopper (A) 7 allows the crude oil to flow from the cylinder end 18 on the oil-containing sludge discharge side of the inner cylinder (A) 5 to the oil-containing sludge discharge chamber 14. When the oil-impregnated sludge is discharged from the inner cylinder (A) 5 to the oil-containing sludge discharge chamber 14, the inner cylinder ( A) The oil-containing sludge is discharged between the inner cylinder (A) 5 and the cylinder end 18 on the oil-containing sludge discharge side so that the oil-containing sludge is discharged from the inside 5 to the oil-containing sludge discharge chamber 14. It plays the role of forming the gap 15. When the oil-containing sludge is discharged from the inner cylinder (A) 5, the stopper (A) 7 and the screw (A) 4 are selected by selecting the size of the oil-containing sludge discharge gap 15. And while the oil-containing sludge is squeezed by the inner cylinder (A) 5, the crude oil content squeezed by the squeezing is discharged from the crude oil passage hole of the inner cylinder (A) 5 to the crude oil discharge gap 22. However, since the oil-containing sludge after being squeezed can be discharged from the oil-containing sludge discharge gap 15, the amount of crude oil contained in the oil-containing sludge discharged from the strainer 1 for crude oil transport pipe is Can be reduced.

  The stopper (A) 7 will be described in detail with reference to FIG. FIG. 4 is a schematic cross-sectional view showing a stopper (A) of a first embodiment of a crude oil transport pipe strainer according to the method for removing sludge in crude oil of the present invention. The stopper (A) 7, as shown in FIG. 4 (4-1), is in contact with the cylinder end 18 on the oil-impregnated sludge discharge side of the inner cylinder (A) 5 and closes the cylinder end 18. , (4-2), the oil-containing sludge discharge gap 15 for discharging the oil-containing sludge to the oil-containing sludge discharge chamber 14 away from the cylinder end 18 on the oil-containing sludge discharge side of the inner cylinder (A) 5. The screw shaft (A) 2 is attached to the screw shaft (A) 2 so as to be movable between positions where the screw is formed. FIG. 1 shows the stopper 7 (A) at the position (4-2) in FIG. If the first embodiment of the strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention is used, for example, as shown in (4-1) of FIG. At a position in contact with the cylinder end 18 on the oil-containing sludge discharge side of the inner cylinder (A) 5, crude oil is supplied from the crude oil supply port 10, the crude oil is filtered, then the supply of crude oil is stopped, As shown in (4-2) of FIG. 4, the stopper (A) 7 is positioned away from the cylinder end 18 on the oil-impregnated sludge discharge side of the inner cylinder (A) 5, and the screw (A) 4 is The oil-containing sludge remaining in the inner cylinder (A) 5 is moved to the oil-containing sludge discharge side of the inner cylinder (A) 5, and the oil-containing sludge is discharged from the oil-containing sludge discharge gap 15. Driving. That is, the first embodiment of the crude oil transport pipe strainer according to the method for removing sludge in crude oil of the present invention is an embodiment in which the position of the stopper (A) is selected.

  Moreover, as another form example (second form example) of the strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention, the stopper (A) is connected to the screw shaft (A ) Is slidably attached, and a pressure adjusting member for applying pressure by an elastic body, hydraulic pressure, air pressure or the like is attached to the back surface. When the second embodiment of the crude oil transport pipe strainer according to the method for removing sludge in crude oil of the present invention is used, when the crude oil is filtered, the oil-containing sludge discharged from the inner cylinder (A) 5 is discharged. In order to prevent the crude oil from being discharged from the cylinder end on the side to the oil-containing sludge discharge chamber, the stopper (A) is used by the pressure adjusting member so that the cylinder end on the discharge side of the oil-containing sludge is closed. When the oil-containing sludge is discharged from the inner cylinder (A) 5 to the oil-containing sludge discharge chamber, the stopper (A) and the screw (A) are adjusted. 4 and the inner cylinder (A) 5 squeezed the oil-impregnated sludge, and the crude oil squeezed by squeezing is discharged from the crude oil passage hole of the inner cylinder (A) 5 into the crude oil discharge gap. And the oil-impregnated sludge after being squeezed is discharged As discharged from the gap, it is operated as of regulating the pressure applied to the rear surface of the stopper (A) in 該調 member. That is, when discharging the oil-containing sludge from the inner cylinder (A) 5 to the oil-containing sludge discharge chamber, the pressure applied to the back surface of the stopper (A) by the pressure adjusting member is adjusted. Since the compression ratio of the oil-containing sludge can be adjusted, if the pressure applied by the pressure adjusting member is adjusted, the size of the oil-containing sludge discharge gap is set to a size at which the oil-containing sludge is compressed. Is automatically adjusted. The back surface of the stopper (A) is the side opposite to the side where the oil-containing sludge discharge gap is formed with the inner cylinder (A) 5. That is, the second embodiment of the strainer for crude oil transport pipe according to the method for removing sludge in crude oil according to the present invention adjusts the pressure applied to the back surface of the stopper (A) with the pressure adjusting member, thereby preventing the stopper ( It is a form example which adjusts the position of A) automatically.

  The crude oil supply port 10 is a supply port for supplying crude oil into the inner cylinder (A) 5. The installation position of the oil-containing sludge supply port 10 in the moving direction of the oil-containing sludge is not particularly limited. Moreover, the installation position of the crude oil sludge supply port 10 in the circumferential direction of the inner cylinder (A) 5 and the outer cylinder (A) 6 is usually the uppermost position as shown in FIG. It is not limited and is appropriately selected depending on the position of a crude oil supply pipe (not shown).

  The steam or cleaning water supply port 11 on the outer cylinder side is supplied with steam or water for supplying high-pressure steam or cleaning water to the inner cylinder (A) 5 from the outside of the inner cylinder (A) 5. This is the cleaning water supply port. The crude oil passage hole formed in the cylindrical wall of the inner cylinder (A) 5 is gradually blocked by sludge in the crude oil, such as iron rust, sand, mud, etc., when the crude oil is continuously filtered. . Then, when the amount of blockage of the passage hole increases, the supply of crude oil is stopped, and the passage is performed by supplying steam or washing water at a high pressure from the steam or washing water supply port 11 on the outer cylinder side. Sludge clogged in the holes can be removed. The washing water is not particularly limited, and industrial water is usually used. In addition, the supply pressure of the water vapor or the washing water is appropriately selected within a range of pressure at which sludge clogged in the passage hole is removed. The installation position of the steam or cleaning water supply port 11 on the outer cylinder side in the moving direction of the oil-containing sludge, and the steam or cleaning water supply port on the outer cylinder side in the circumferential direction of the outer cylinder (A) 6 The installation position of 11 is not particularly limited. Also, the number of steam or cleaning water supply ports 11 on the outer cylinder side in the moving direction of the oil-containing sludge and the supply of steam or cleaning water on the outer cylinder side in the circumferential direction of the outer cylinder (A) 6 The number of the mouths 11 is not particularly limited, and is appropriately selected so that the steam or the washing water is supplied to the entire inner cylinder (A) 5.

  The oil-containing sludge discharge port 12 is a discharge port for discharging oil-containing sludge from the oil-containing sludge discharge chamber 14 to the outside of the apparatus. The installation position of the oil-containing sludge discharge port 12 in the circumferential direction of the outer cylinder (A) 6 is usually at the lowest position.

  The crude oil outlet 13 is an outlet for discharging the filtered crude oil discharged into the crude oil discharge gap 22 to the outside of the apparatus. The installation position of the crude oil outlet 13 and the number of installed crude oil outlets 13 in the moving direction of the oil-containing sludge are not particularly limited and are appropriately selected. Moreover, the installation position of the crude oil outlet 13 in the circumferential direction of the outer cylinder (A) 6 is usually at the lowest position. And as a setting position of this crude oil discharge port 13, the center or its vicinity in the moving direction of this oil-containing sludge, and the lowest part or its vicinity in the circumferential direction of this outer cylinder (A) 6 are preferable.

  In the crude oil transport pipe strainer 1, the screw shaft (A) 2 and the inner cylinder (A) 5 may be horizontal, may be inclined to the crude oil supply side, and may be inclined to the oil-containing sludge discharge side. You may do it.

  Next, the operation method of the strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention will be described with reference to FIG. FIG. 5 is a schematic cross-sectional view of the crude oil transport pipe strainer 1 showing how the crude oil is filtered using the crude oil transport pipe strainer 1.

  In the first embodiment of the crude oil transport pipe strainer 1, that is, the crude transport pipe strainer according to the method for removing sludge in crude oil of the present invention, first, as shown in FIG. (A) 7 is brought into contact with the cylinder end 18 on the oil-containing sludge discharge side of the inner cylinder (A) 5, and the crude oil 41 is supplied from the crude oil supply port 10, whereby the inner cylinder (A) 5 The crude oil 41 is filtered, and the oil-containing sludge in the crude oil 41 is filtered off. At this time, the filtered crude oil 42 is discharged out of the apparatus through the crude oil outlet 13 through the crude oil discharge gap 22. The oil-containing sludge 43 filtered from the crude oil 41 remains in the inner cylinder (A) 5.

  When the amount of the oil-containing sludge accumulated in the inner cylinder (A) 5 increases, the supply of the crude oil 41 is then stopped. Next, the position of the stopper (A) 7 is changed, and as shown in FIG. 4 (4-2), the stopper (A) 7 is moved to the cylinder end 18 on the oil-containing sludge discharge side of the inner cylinder (A) 5. The oil-containing sludge in the inner cylinder (A) 5 is moved to the oil-containing sludge discharge side of the inner cylinder (A) 5 by rotating the screw (A) 4 to a position away from the oil-containing sludge. The sludge is squeezed, and the crushed crude oil is discharged from the crude oil discharge gap 22, and the oil-containing sludge 43 is discharged from the oil-containing sludge discharge gap 15. Further, from the oil-containing sludge discharge port 12, Discharge out of the device.

  In the second embodiment of the strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention, first, the pressure applied to the back surface of the stopper (A) is adjusted with the pressure regulating member, and the stopper (A ) Is in contact with the cylinder end of the inner cylinder (A) 5 on the oil-containing sludge discharge side, and the crude oil is filtered through the inner cylinder (A) 5 by supplying crude oil from the crude oil supply port, Oil-containing sludge in the crude oil is filtered off. At this time, the filtered crude oil is discharged from the crude oil outlet through the crude oil discharge gap. Further, the oil-containing sludge filtered from the crude oil remains in the inner cylinder (A) 5.

  When the amount of the oil-containing sludge accumulated in the inner cylinder (A) 5 increases, the supply of the crude oil is then stopped. Next, by adjusting the pressure applied to the back surface of the stopper (A) with the pressure adjusting member so that the oil-containing sludge discharge gap of an appropriate size is formed, the screw (A) 4 is rotated. The oil-containing sludge in the inner cylinder (A) 5 is moved to the oil-containing sludge discharge side of the inner cylinder (A) 5, the oil-containing sludge is compressed, and the oil-containing sludge is compressed from the crude oil discharge gap. The crude oil is discharged, the oil-containing sludge is discharged from the oil-containing sludge discharge gap, and further discharged from the oil-containing sludge discharge port to the outside of the apparatus.

  Although not shown in FIGS. 1 and 4, the water vapor or the cleaning water used for cleaning the inner cylinder (A) 5 is discharged as moisture into the crude oil discharge gap after cleaning. Therefore, in order to discharge this moisture out of the apparatus, the strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention may have a post-cleaning water discharge pipe.

  The strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention is used for removing sludge in crude oil. The installation position of the strainer for the crude oil transport pipe according to the method for removing sludge in the crude oil of the present invention includes a crude oil drilling well and a primary storage tank of crude oil for storing the crude oil drilled from the crude oil drilling well (the oil producing country or the oil producing oil). It is in the middle of the crude oil transport pipe to and from the place.

  The method for removing sludge in crude oil according to the present invention will be described with reference to FIG. FIG. 6 shows an example of a method for removing sludge in crude oil of the present invention (first example) using a first embodiment of a strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention. It is a schematic diagram which shows the removal system of the sludge in the crude oil for implementing.

  In FIG. 6, a crude oil sludge removal system 50 includes a crude oil transport pipe 52 (52a and 52b) that connects a crude oil drilling well 51 and a primary storage tank 57 of crude oil for storing the crude oil drilled in the crude oil drilling well 51. In the middle of this, there are two strainers 1a and 1b for crude oil transport pipes. One ends of crude oil supply pipes 54a and 54b are connected to the crude oil supply ports of the crude oil transport pipe strainers 1a and 1b. The other ends of the crude oil supply pipes 54a and 54b are connected to the crude oil transport pipe 52a. The crude oil discharge pipes 56a and 56b are connected to the crude oil discharge ports of the crude oil transport pipe strainers 1a and 1b. The other ends of the crude oil discharge pipes 56a and 56b are connected to the crude oil transport pipe 52b. Also, one end of a screw conveyor 58 (58a, 58b) for conveying the oil-containing sludge is connected to the oil-containing sludge discharge port of the crude oil transport pipe strainers 1a and 1b. The other end of the screw conveyor 58 for conveying the oil-containing sludge is connected to the oil-containing sludge processing device 60 of the oil recovery unit X. Further, valves 55a and 55b are attached to the crude oil supply pipes 54a and 54b, and valves 55c and 55d are attached to the crude oil discharge pipes 56a and 56b. The crude oil transport pipe strainers 1a and 1b are a first embodiment of the crude oil transport pipe strainer of the present invention. Moreover, in FIG. 6, the part enclosed with the dashed-dotted line is the removal system 50 of the sludge in this crude oil. In FIG. 6, the part surrounded by the dotted line is the oil content recovery unit X. The crude oil transport pipe 52a is connected to a crude oil transport pump 53 installed at the site of the crude oil drilling well 51 in order to carry out the crude oil 41 from the crude oil drilling well 51.

  The oil content recovery unit X treats the oil-containing sludge with the oil-containing sludge processing device 60 that separates the residual sludge from the oil-containing sludge by bringing water vapor into contact with the oil-containing sludge, and the oil-containing sludge processing device 60. The oil-water separator 61 which separates the oil-water produced by this into oil and moisture is provided. The oil-containing sludge treatment device 60 and the oil / water separator 61 are connected by an oil / water transfer pipe 68. The oil-containing sludge treatment device 60 is connected to a residue sludge discharge pipe 62 for discharging the residue sludge 65 separated from the oil-containing sludge to the outside of the device. The oil / water separator 61 is connected to an oil discharge pipe 63 for discharging the oil 66 to the outside of the apparatus and a water discharge pipe 64 for discharging the moisture 67 to the outside of the apparatus. The oil / water transport pipe 68 is usually provided with a pump (not shown) for transporting the oil / water 70 to the oil / water separator 61. Further, a filtration member (not shown) for removing fine sludge usually present in the oil water 70 is attached to the front stage of the pump for transporting the oil water 70 to the oil water separator 61. Yes.

  In the first embodiment of the method for removing sludge in crude oil of the present invention, first, the valves 55a and 55c are opened and the valves 55b and 55d are closed. The crude oil 41 excavated in the excavation well 51 is supplied to the crude oil transport pipe strainer 1a through the crude oil transport pipe 52a and the crude oil supply pipe 54a. At this time, the stopper (A) 7 is brought into contact with the cylinder end of the inner cylinder (A) 5 on the oil-impregnated sludge discharge side to block the cylinder end of the inner cylinder (A) 5 on the oil-containing sludge discharge side. . Then, the crude oil 41 is filtered by the crude oil transport pipe strainer 1a, the filtered crude oil 42 is discharged out of the apparatus, passed through the crude oil discharge pipe 56a and the crude oil transport pipe 52b, and the crude oil primary. Transport to storage tank 57.

  Next, until the pressure difference between the pressure gauge (not shown) attached to the crude oil supply pipe 54a and the pressure gauge (not shown) attached to the crude oil discharge pipe 56a exceeds a certain value, After filtering the crude oil 41, the valves 55b and 55d are opened and the valves 55a and 55c are closed. The crude oil 41 is supplied to the crude oil transport pipe strainer 1b through the crude oil transport pipe 52a and the crude oil supply pipe 54b by using the crude oil transport pump 53. At this time, the stopper (A) 7 is brought into contact with the cylinder end of the inner cylinder (A) 5 on the oil-impregnated sludge discharge side to block the cylinder end of the inner cylinder (A) 5 on the oil-containing sludge discharge side. . Then, the crude oil 41 is filtered by the crude oil transport pipe strainer 1b, the filtered crude oil 42 is discharged out of the apparatus, passed through the crude oil discharge pipe 56b and the crude oil transport pipe 52b, and the crude oil primary. Transport to storage tank 57. In the above description, it is described that the switching time from the crude oil transport pipe strainer 1a to the crude oil transport pipe strainer 1b is determined based on the differential pressure. However, the present invention is not limited to this, and depending on the processing time or the processing amount of the crude oil, For example, it is possible to use a method capable of appropriately determining the switching timing, such as grasping the amount of the oil-containing sludge accumulated in the crude oil transport pipe strainer 1a.

  In parallel with the filtration of the crude oil 41 by the crude oil transport pipe strainer 1b, discharge of the oil-impregnated sludge in the inner cylinder (A) 5 of the crude oil transport pipe strainer 1a to the outside of the apparatus, and the inner cylinder (A) Washing 5 is performed. First, the stopper (A) 7 is separated from the cylinder end of the inner cylinder (A) 5 on the oil-impregnated sludge discharge side, and the oil-impregnated oil is placed between the inner cylinder (A) 5 and the stopper (A) 7. A sludge discharge gap 15 is formed. Then, the screw (A) 4 of the crude oil transport pipe strainer 1a is rotated to move the oil-containing sludge in the inner cylinder (A) 5 to the oil-containing sludge discharge side, and the oil-containing sludge discharge gap 15 The oil-containing sludge discharge chamber 14 is used to discharge the oil-containing sludge discharge port 12 to the outside of the apparatus. Next, the water vapor 40 is supplied from the water vapor or washing water supply port (A) 11 on the outer cylinder side, and the inner cylinder (A) 5 is cleaned, and the inner cylinder (A) 5 is passed through the passage hole. Remove clogged sludge. In the above description, it is described that steam is supplied from the steam or cleaning water supply port (A) 11 on the outer cylinder side, but high-pressure cleaning water, for example, industrial water can also be supplied.

  Next, until the pressure difference between the pressure gauge (not shown) attached to the crude oil supply pipe 54b and the pressure gauge (not shown) attached to the crude oil discharge pipe 56b exceeds a certain value, After the crude oil 41 is filtered by the crude oil transport pipe strainer 1b, the valves 55a and 55c are opened and the valves 55b and 55d are closed, and again, the crude oil transport pipe strainer 1a is used. Filter. In parallel with this, the oil-containing sludge in the inner cylinder (A) 5 of the crude oil transport pipe strainer 1b is discharged out of the apparatus and the inner cylinder (A) 5 is washed.

  Thereafter, in the same manner, the crude oil 41 is alternately filtered by the crude oil transport pipe strainer 1a and the crude oil transport pipe strainer 1b. In parallel with the filtration of the crude oil 41 by the crude oil transport pipe strainer 1a, the oil-impregnated sludge in the inner cylinder (A) 5 of the crude oil transport pipe strainer 1b is discharged outside the apparatus, and the inner cylinder (A) 5 is washed, and in parallel with the filtration of the crude oil 41 by the crude oil transport pipe strainer 1b, the oil-containing sludge device in the inner cylinder (A) 5 of the crude oil transport pipe strainer 1a The discharge to the outside and the cleaning of the inner cylinder (A) 5 are performed.

  Thus, the crude oil filtration step according to the method for removing sludge in crude oil of the present invention is performed.

  Next, the oil-containing sludge 43 discharged to the outside of the apparatus is supplied to the oil-containing sludge processing apparatus 60 via the screw conveyor 58. The oil-containing sludge processing unit 60 processes the oil-containing sludge 43, separates the residue sludge 65 from the oil-containing sludge 43, and discharges the residue sludge 65 from the residue sludge discharge pipe 62 to the outside of the device. At the same time, the oily water generated by processing the oil-containing sludge in the oil-containing sludge processing device 60 is supplied to the oil-water separation device 61 through the oil-water transport pipe 68. Next, the oil / water separator 61 separates the oil 66 and the water 67.

  In this manner, the oil content recovery unit X recovers the oil content 66 from the oil-containing sludge 43 and performs the oil content recovery step according to the method for removing sludge in crude oil of the present invention.

  After the oil content recovery step, the oil content 66 recovered from the oil-containing sludge 43 is normally returned to the subsequent stage of the crude oil transport pipe strainers 1a and 1b, but may be returned to the previous stage. Alternatively, the oil 66 may be transported to another tank.

  The method for removing sludge in crude oil of the present invention is not limited to this (first embodiment), and as another embodiment of the method for removing sludge in crude oil of the present invention (second embodiment), For example, the form example which uses the 2nd form example of the strainer for crude oil transport pipes which concerns on the removal method of the sludge in the crude oil of this invention is mentioned.

  When installing the second embodiment of the method for removing sludge in crude oil of the present invention, that is, the second embodiment of the strainer for crude oil transport pipe according to the method for removing sludge in crude oil of the present invention, the crude oil filtration In the step, when the oil-containing sludge in the inner cylinder (A) is squeezed and the oil-containing sludge after squeezing is discharged to the outside of the apparatus, the pressure applied to the back surface of the stopper (A) by the pressure adjusting member is The first embodiment of the method for removing sludge in crude oil of the present invention, except that by adjusting the compression rate of the oil-containing sludge, the size of the oil-containing sludge discharge gap is automatically adjusted. It is the same.

  The oil recovery step is the same as in the first embodiment of the method for removing sludge in crude oil of the present invention.

  Although FIG. 6 shows that there are two strainers for the crude oil transportation pipe according to the method for removing sludge in the crude oil of the present invention installed in the middle of the crude oil transportation pipe, the present invention is not limited to this. There may be one machine or three or more machines. FIG. 6 shows that the means for conveying the oil-containing sludge 43 from the oil-containing sludge discharge ports of the crude oil transport pipe strainers 1a and 1b to the oil content recovery unit X is a screw conveyor 58. However, the present invention is not limited to this, and a means capable of transporting the oil-containing sludge 43 from the oil-containing sludge discharge ports of the crude oil transport pipe strainers 1a and 1b to the oil recovery unit X is appropriately selected.

  FIG. 6 shows that the unit for recovering oil from the oil-containing sludge is the oil recovery unit X. However, the present invention is not limited to this, and any unit that can recover oil from the oil-containing sludge can be used. That's fine.

  The oil recovery step according to the method for removing sludge from crude oil according to the present invention will be described in more detail. The oil content recovery step includes an oil-containing sludge treatment operation for separating residual sludge from the oil-containing sludge discharged from the crude oil transport pipe strainers 1a and 1b, and oil water generated by the oil-containing sludge treatment operation is separated into oil and moisture. And an oil / water separation operation.

  The oil-containing sludge processing operation related to the oil content recovery step is a processing operation of oil-containing sludge in which the oil-containing sludge is brought into contact with water vapor at 100 to 200 ° C., and then the containing sludge is pressed and separated into oil water and residual sludge. is there. In the treatment operation of the oil-containing sludge, the oil and water in the oil-containing sludge and the supplied water vapor are separated into the condensed water and the residual sludge, but the oil and water in the oil-containing sludge and the supplied water are supplied. Including all the moisture condensed by water vapor, it is also referred to as “oil water”.

  The oily sludge treatment operation is a continuous oily sludge treatment operation.

The oil-containing sludge processing operation is, for example, the following screw-type oil-containing sludge processing apparatus, that is,
A screw (B) comprising a screw shaft (B) having a water supply hole, and screw blades (B) spirally provided on the outer periphery of at least a part of the screw shaft (B);
An inner cylinder (B) having an oil-water passage hole and surrounding the screw;
An outer cylinder (B) that is installed outside the inner cylinder (B) and forms an oil-water discharge gap with the inner cylinder (B);
An oil-containing sludge supply port for supplying oil-containing sludge into the inner cylinder (B);
An outer cylinder side water vapor supply port (B) for supplying water vapor into the outer cylinder (B);
A stopper (B) installed in the vicinity of the cylinder end on the residue sludge discharge side of the inner cylinder (B), and forming a residue sludge discharge gap with the cylinder end on the residue sludge discharge side of the inner cylinder (B); ,
An oil water discharge port for discharging the oil water discharged into the oil water discharge gap to the outside of the device;
Drive means (B) for rotationally driving the screw;
A screw-type oil-containing sludge treatment apparatus having
Can be used.

  The oil-containing sludge treatment apparatus has a ratio of a length from a cylinder end on the oil-containing sludge supply side of the inner cylinder (B) to the outer cylinder-side steam supply port (B) with respect to the length of the inner cylinder (B). , 0.5 or less is preferable.

  The screw-type oil-containing sludge treatment apparatus will be described with reference to FIGS. 7 and 8 are schematic cross-sectional views of the screw-type oil-containing sludge treatment apparatus, and FIG. 7 is a cross-sectional view taken along a plane parallel to the moving direction of the oil-containing sludge. These are sectional drawings when it cuts in the surface perpendicular | vertical with respect to the moving direction of oil-containing sludge. FIG. 9 is a side view of the screw (B) in FIGS. 7 and 8. FIG. 10 is a cross-sectional view illustrating the inner cylinder and the outer cylinder of FIG. 7 and 8, the screw-type oil-containing sludge treatment device 131 includes a screw (B) 134, an inner cylinder (B) 135 surrounding the screw (B) 134, and an outer side of the inner cylinder (B) 135. In addition, an outer cylinder (B) 136 installed so that an oil water discharge gap 152 is formed between the inner cylinder (B) 135 and a cylinder on the residue sludge discharge side of the inner cylinder (B) 135. Stopper (B) 137 installed in the vicinity of end 148, oil-impregnated sludge supply side flange 138 installed on the oil-impregnated sludge supply side of inner cylinder (B) 135 and outer cylinder (B) 136, and inner cylinder (B) 135 and residue sludge discharge side flange 139 installed so as to form a residue sludge discharge chamber 144 on the residue sludge discharge side of the outer cylinder (B) 136, and the inner cylinder (B) 135 containing oil To supply sludge Residual sludge is supplied to the outside from the oil-impregnated sludge supply port 140, the outer cylinder side water vapor supply port (B) 141 for supplying water vapor into the outer cylinder (B) 136, and the residue sludge discharge chamber (B) 144. Residual sludge discharge port 142 for discharging, oil water discharge port 143 for discharging oil water discharged to the oil water discharge gap 152 to the outside of the apparatus, and gas in the outer cylinder (B) 136 And an exhaust port (B) 146 for discharging to the outside.

  As shown in FIG. 9, the screw (B) 134 includes a screw shaft (B) 132 and a screw blade (B) 133. The screw blade (B) 133 is spirally provided on the outer periphery of at least a part of the screw shaft (B) 132. The screw shaft (B) 132 is rotatably fixed to the oil-impregnated sludge supply side flange 138 and the residue sludge discharge side flange 139.

  The screw shaft (B) 132 is a hollow tube, and one end 158 of the screw shaft (B) 132 is an opening for supplying water vapor into the tube of the screw shaft (B) 132. The other end 159 of the screw shaft (B) 132 is sealed. The shaft wall of the screw shaft (B) 132 is formed with a water vapor supply hole 157 for discharging water vapor from the space inside the shaft to the outside of the shaft. The water vapor supply hole 157 supplies water vapor to the oil-impregnated sludge in the inner cylinder (B) 135 from the screw shaft (B) 132 side, that is, from the center of the inner cylinder (B) 135 to the outside. This is a water vapor supply hole.

  The diameter of the water vapor supply hole 157 is appropriately selected depending on the size of the sludge in the oil-containing sludge to be treated, but is usually 5 to 12 mm, preferably 8 to 12 mm, and particularly preferably 8 to 10 mm. In FIG. 9, a range 154 in which the water vapor supply hole 157 is formed is selected as appropriate. Usually, the oil-containing sludge supply side is close to the oil-containing sludge supply-side flange 138, and usually the residue sludge is discharged. The ratio of the length of the range 154 in which the water vapor supply hole 157 is formed to the length of the portion 153 surrounded by the inner cylinder (B) 135 (reference numeral 154 / reference numeral 153) is 0.5 to The position is 0.866, preferably 0.66 to 0.866, particularly preferably 0.76 to 0.866. When the ratio of the length of the range 154 in which the water vapor supply hole 157 is formed to the length of the portion 153 surrounded by the inner cylinder (B) 135 (symbol 154 / symbol 153) exceeds the above range, sludge The amount of water in it tends to increase. The number of the water vapor supply holes 157 is appropriately selected depending on the type of oil-containing sludge, the scale of the apparatus, and the like.

  The screw blade (B) 133 is formed in a spiral shape on the outer periphery of the screw shaft (B) 132, and the oil-containing sludge in the inner cylinder (B) 135 is rotated by the rotation of the screw (B) 134. If it is the shape which can be moved from oil-containing sludge supply side to residue sludge discharge side, it will not be restrict | limited in particular.

  The diameter 155 of the screw blade (B) 133 may be the same length as the inner diameter of the inner cylinder (B) 135, or may be slightly smaller than the inner diameter of the inner cylinder (B) 135. When the diameter 155 of the screw blade (B) 133 is smaller than the inner diameter of the inner cylinder (B) 135, the clearance between the screw blade (B) 133 and the inner cylinder (B) 135 is usually 1 mm or less, The thickness is preferably 0.5 mm or less, particularly preferably 0.1 mm or less.

  The ratio (reference numeral 156 / reference numeral 155) of the pitch 156 of the screw blade (B) 133 to the diameter 155 of the screw blade (B) 133 is 0.25 to 1.25. And since it becomes easy to slow down the moving speed of oil-impregnated sludge, in other words, it becomes easy to lengthen the compression time of the oil-impregnated sludge, and therefore the screw blade (B ) The ratio of the pitch 156 of the screw blade (B) 133 to the diameter 155 of 133 (reference numeral 156 / reference numeral 155) is preferably 0.5 to 1.25, particularly preferably 0.75 to 1, and more preferably 0. .9-1. In the processing operation of the oil-impregnated sludge, the pitch 156 of the screw blade (B) 133 is the distance between the apexes 561a and 561b of the screw blade in FIG. 9, that is, the screw blade (B) 133 is viewed from the side. The distance between the vertices of adjacent blades.

  The pitch 156 of the screw blade (B) 133 may be the same or different over the entire range of the screw blade (B) 133.

  In addition, in the processing operation of the oil-impregnated sludge, the shape of the screw (B) 134 is not limited to the shape shown in FIGS. 7 and 9, and for example, the screw shaft is moved toward the residue sludge discharge side. Examples include those having a larger diameter and those having a smaller pitch toward the residue sludge discharge side.

  The inner cylinder (B) 135 has a cylindrical shape. A cylinder end 149 on the oil-impregnated sludge supply side of the inner cylinder (B) 135 is fixed to the oil-impregnated sludge supply-side flange 138, and the cylinder end 149 is closed by the oil-containing sludge supply-side flange 138. On the other hand, the cylinder end 148 on the residue sludge discharge side of the inner cylinder (B) 135 is fixed to the residue sludge discharge side flange 139, and the opening of the cylinder end 148 is connected to the residue sludge discharge chamber 144. Yes. That is, the tube end 148 is opened so that the residual sludge is discharged out of the inner tube (B) 135.

  Oil water separated from the object to be squeezed in the inner cylinder (B) 135 by squeezing oil-containing sludge on the cylinder wall of the inner cylinder (B) 135 is discharged from the inner cylinder (B) 135 to the oil water. An oil water passage hole (not shown) is formed so as to be discharged into the gap 152.

  The cylindrical wall of the inner cylinder (B) 135 is not particularly limited as long as the oil water passage hole is formed. Examples of the cylindrical wall of the inner cylinder (B) 135 include a wire mesh, punching, and the like. Examples thereof include a plate material in which holes such as metal are punched out, a screen wire mesh, and the like.

  The diameter of the oil water passage hole formed in the cylindrical wall of the inner cylinder (B) 135 is appropriately selected depending on the size of the sludge in the oil-containing sludge to be treated. It is 96 mm, preferably 0.2 to 1.74 mm, particularly preferably 0.3 to 0.5 mm. When the cylinder wall of the inner cylinder (B) 135 is a wire mesh, the diameter of the oil water passage hole indicates the length of the opening of the wire mesh, and the cylinder wall of the inner cylinder (B) 135 is In the case of punching metal, the diameter of the oil water passage hole refers to the diameter of the punched hole.

  By installing the inner cylinder (B) 135 so as to surround the screw (B) 134, oil-containing sludge is compressed between the inner wall of the inner cylinder (B) 135 and the screw blade (B) 134. A compressed space 147 is formed.

  The outer cylinder (B) 136 has a cylindrical shape. The cylinder end 150 on the oil-impregnated sludge supply side of the outer cylinder (B) 136 is fixed to the oil-impregnated sludge supply-side flange 138, and the cylinder end 150 is closed by the oil-containing sludge supply-side flange 138. On the other hand, a cylinder end 151 on the residue sludge discharge side of the outer cylinder (B) 136 is fixed to the residue sludge discharge side flange 139, and the oil water discharge gap 152 and the residue sludge discharge chamber 144 are It is isolated by a residue sludge discharge side flange 139. That is, the oil water discharge gap 152 is blocked by the residue sludge discharge side flange 139 so that the oil water discharged into the oil water discharge gap 152 does not flow into the residue sludge discharge chamber 144.

  The width of the oil-water discharge gap 152 formed by the inner cylinder (B) 135 and the outer cylinder (B) 136, in other words, the outside of the inner cylinder (B) 135 and the outer cylinder (B) 136 The distance from the inside is the oil and water separated from the object to be compressed in the inner cylinder (B) 135 by compressing the oil-containing sludge, and the water in which the supplied water vapor is condensed, that is, the oil water is discharged. There is no particular limitation as long as it can flow to the oil / water discharge port 143.

  7 and 8, the outer cylinder (B) 136 has a circular cross section when cut along a plane perpendicular to the moving direction of the oil-containing sludge. The shape of the outer cylinder (B) 136 is not limited to this, and the inner cylinder (B) 135 can be installed on the inner side, and the oil water is discharged to flow to the oil water discharge port 143. What is necessary is just to be able to form the discharge gap. In addition, as the shape of the outer cylinder (B), for example, a cylindrical shape having a flat upper side and a rounded lower side can be cited. Further, the cylindrical wall at the bottom of the outer cylinder (B) 136 may be inclined toward the oil / water discharge port 143.

  The stopper (B) 137 is fixed to the screw shaft (B) 132 and is installed in the vicinity of the cylinder end 148 on the residue sludge discharge side of the inner cylinder (B) 135. The stopper (B) 137 adjusts the compressibility of the oil-containing sludge by adjusting the discharge amount of the residual sludge when the residual sludge is discharged from the tube end 148 to the residual sludge discharge chamber 144. Fulfills the function. Specifically, the size of the residue sludge discharge gap 145 formed between the stopper (B) 137 and the cylinder end 148 is adjusted by adjusting the installation position of the stopper (B) 137. Thus, the discharge amount of the residual sludge can be adjusted. And the compression rate of this oil-containing sludge can be adjusted by adjusting the ratio of the discharge amount of this residual sludge with respect to the supply amount of this oil-containing sludge. The installation position of the stopper 137 or the residual sludge discharge gap 145 formed by the stopper 137 and the tube end 148 is appropriately selected depending on the type of oil-containing sludge, the oil content of the oil-containing sludge, the processing conditions, and the like. The

  The oil-containing sludge supply port 140 is a supply port for supplying oil-containing sludge into the inner cylinder (B) 135. As shown in FIG. 10, the installation position of the oil-containing sludge supply port 140 in the oil-containing sludge movement direction 164 is the oil-containing sludge supply side of the inner cylinder (B) 135 with respect to the length 161 of the inner cylinder (B) 135. The ratio of the length 163 from the cylinder end 149 to the oil-impregnated sludge supply port 140 (reference numeral 163 / reference numeral 161) is 0.15 or less, preferably 0.125 or less, particularly preferably 0.093 to 0.125. Is the position. The ratio of the length 163 from the cylinder end 149 on the oil-impregnated sludge supply side of the inner cylinder (B) 135 to the oil-impregnated sludge supply port 140 with respect to the length 161 of the inner cylinder (B) 135 is within the above range. In addition, the treatment effect of the oil content of the oil-containing sludge is increased. In the operation of processing the oil-containing sludge, the length 161 of the inner cylinder (B) 135 is the discharge of residual sludge from the inner cylinder (B) from the cylinder end 149 on the oil-containing sludge supply side of the inner cylinder (B). This refers to the distance to the tube end 148 on the side, and the position of the oil-containing sludge supply port 140 refers to the center position of the oil-containing sludge supply port 140. In addition, the installation position of the oil-impregnated sludge supply port 140 in the circumferential direction of the inner cylinder (B) 135 and the outer cylinder (B) 136 is usually the uppermost position as shown in FIGS. However, it is not limited to this, and is appropriately selected depending on the position of an oil-containing sludge supply pipe (not shown).

  The outer cylinder side steam supply port (B) 141 is centered from the inner cylinder (B) 135 side with respect to the oil-impregnated sludge in the inner cylinder (B) 135, that is, from the outside of the inner cylinder (B) 135. It is the supply port of the water vapor | steam for supplying water vapor | steam toward. As shown in FIG. 10, the installation position of the outer cylinder side water vapor supply port (B) 141 in the moving direction of the oil-containing sludge is the inner cylinder (B) 135 with respect to the length 161 of the inner cylinder (B) 135. The ratio of the length 162 from the cylinder end 149 on the oil-impregnated sludge supply side to the outer cylinder-side water vapor supply port (B) 141 (reference numeral 162 / reference numeral 161) is 0.5 or less, preferably 0.03 to 0.00. 5, particularly preferably 0.14 to 0.3, and more preferably 0.18 to 0.25. The ratio of the length 162 from the cylinder end 149 on the oil-impregnated sludge supply side of the inner cylinder (B) 135 to the length 161 of the inner cylinder (B) 135 to the outer cylinder-side water vapor supply port (B) 141 is as described above. By being in the range, a large amount of water vapor can be brought into contact with the oil-containing sludge at the initial stage when the oil-containing sludge is squeezed in the inner cylinder (B) 135. The processing effect is increased. In the operation of treating the oil-containing sludge, the position of the outer cylinder side water vapor supply port (B) 141 refers to the center position of the outer cylinder side water vapor supply port (B) 141.

  Moreover, although the installation position of this outer cylinder side water vapor supply port (B) 141 in the circumferential direction of this outer cylinder (B) 136 is the lowest in FIG.7 and FIG.10, it is not restricted to this. However, it is appropriately selected depending on the position of a water vapor supply pipe (not shown). The number of the outer cylinder side water vapor supply ports (B) 141 is not particularly limited, and may be 1 or 2 or more.

  The oil water discharge port 143 is a discharge port for discharging the oil water discharged into the oil water discharge gap 152 to the outside of the apparatus. The installation position of the oil / water discharge port 143 and the number of the oil / water discharge ports 143 in the moving direction of the oil-containing sludge are not particularly limited and are appropriately selected. Further, the installation position of the oil / water discharge port 143 in the circumferential direction of the outer cylinder (B) 136 is usually at the lowest position.

  The exhaust port (B) 146 is a gas exhaust port for exhausting a gas such as water vapor in the apparatus to the outside of the apparatus. The installation position of the exhaust port (B) 146 and the number of installation of the exhaust port (B) 146 in the moving direction of the oil-containing sludge are not particularly limited and are appropriately selected.

  When water vapor is brought into contact with the oil-containing sludge, steam such as hydrocarbons is generated. Therefore, in order to recover them, it is preferable to install a cooling means at the exhaust port (B).

  The screw-type oil-containing sludge treatment device 131 is provided with drive means (B) (not shown) for rotating the screw (B) 134.

  In the screw-type oil-containing sludge treatment apparatus 131, the screw shaft (B) 132 and the inner cylinder (B) 135 may be horizontal, may be inclined toward the oil-containing sludge supply side, and the residue It may be inclined toward the sludge discharge side or may be vertical.

  With reference to FIG. 11, an operation procedure for performing the processing operation of the oil-containing sludge using the screw-type oil-containing sludge processing device 131 will be described. FIG. 11 is a schematic cross-sectional view of the screw-type oil-impregnated sludge treatment apparatus 131, showing a state in which the screw-type oil-impregnated sludge treatment apparatus 131 is performing the treatment operation of the oil-containing sludge. .

  The oil-containing sludge 171 is supplied to the screw-type oil-containing sludge treatment device 131 from the oil-containing sludge supply port 140, and the screw (B) 134 is rotated to supply the oil-containing sludge 171 to the oil-containing sludge. The oil-containing sludge 171 is moved from the port 140 toward the cylinder end 148 on the residue sludge discharge side of the inner cylinder by moving the compression space 147 formed in a spiral around the screw shaft (B) 132. By pressing the oil-containing sludge 171, a high pressure is applied to the oil-containing sludge 171 and the oil-containing sludge 171 is squeezed. Then, while supplying the oil-containing sludge, water vapor 170a at 100 to 200 ° C. is supplied from one end 158 of the screw shaft 132, and water vapor 170b at 100 to 200 ° C. is supplied from the outer cylinder side water vapor supply port (B) 141. Thus, water vapor is brought into contact with the oil-impregnated sludge 171 from both the center and the outside of the inner cylinder (B) 135.

  Therefore, the oil-impregnated sludge supplied from the oil-impregnated sludge supply port 140 immediately after being supplied to the inner cylinder (B) 135, the steam 170a from the steam supply hole 157 of the screw shaft (B) 132, and the It contacts the steam 170b from the outer cylinder side steam supply port (B) 141. Next, the oil-containing sludge 171 moves to the discharge side of the residual sludge while being compressed as the screw (B) 134 rotates. During this time, the steam 170a and the outer cylinder-side steam from the steam supply hole 157 are moved. The water vapor 170b from the supply port (B) 141 is in contact. That is, the water vapor is in contact with the oil-containing sludge 141 even during the pressing.

  Then, while rotating the screw (B) 134, supplying the steam 170a and 170b, continuously supplying the oil-containing sludge 171 and discharging the residue sludge 173, continuously. The oil content of the oil-containing sludge 171 can be processed. At that time, the oil water 172 is appropriately discharged from the oil water discharge port 143, and the exhaust gas 175 is discharged from the exhaust port (B) 146.

  Thus, the treatment operation of the oil-containing sludge is a treatment operation of the oil-containing sludge that contacts the oil-containing sludge with water vapor of 100 to 200 ° C. and then squeezes the oil-containing sludge and separates it into the oil water and the residual sludge. is there. And the processing operation of this oil-containing sludge is the method of processing this oil-containing sludge continuously.

  During the pressing, the oil-containing sludge 171 is heated by steam supplied into the screw-type oil-containing sludge treatment device 131, and the temperature of the supplied steam is 100 to 200 ° C, preferably 100 to 180 ° C. ° C, particularly preferably 110 to 150 ° C, more preferably 130 to 150 ° C. When the temperature of the water vapor to be supplied is within the above range, the oil content in the oil-containing sludge 171 can be satisfactorily processed. Further, the temperature in the screw-type oil-containing sludge treatment apparatus 131 during the pressing is a steady-state temperature of 100 to 200 ° C, preferably 100 to 180 ° C, particularly preferably 110 to 150 ° C, and more preferably. Is 130-150 ° C. The oil content in the oil-containing sludge 171 can be satisfactorily processed when the temperature in the screw-type oil-containing sludge processing device 131 during the pressing is within the above range. The temperature in the screw-type oil-containing sludge treatment device 131 at the time of the compression is such that a thermocouple or the like is installed in the oil water discharge gap 152 at a position not in direct contact with the supplied steam. It is obtained by measuring the temperature of the discharge gap 152.

  In the pressing, the pressing pressure for pressing the oil-containing sludge is appropriately selected depending on the type of oil-containing sludge.

  The pressing time of the oil-containing sludge 171 at the time of pressing, that is, the time from when the oil-containing sludge 171 is supplied from the oil-containing sludge supply port 140 until it is discharged from the residue sludge discharge gap 145 as the residue sludge 173. Is preferably 1 hour or more, particularly preferably 1 to 3 hours, further preferably 1.5 to 3 hours, and more preferably 2 to 2.5 hours. When the pressing time of the oil-containing sludge 171 during the pressing is within the above range, the effect of treating oil and harmful substances in the oil-containing sludge 171 is enhanced. That is, in the treatment operation of the oil-impregnated sludge, the effect of treating the oil in the oil-impregnated sludge is enhanced by slowly pressing the oil-containing sludge over time by setting the compression time of the oil-containing sludge within the above range. can do. On the other hand, even if the squeezing time is too long, the effect is obtained, but the improvement of the effect reaches a peak, and the processing efficiency deteriorates. In the screw-type oil-containing sludge treatment device 131, the rotational speed of the screw (B) 134, the supply amount of the oil-containing sludge 171 from the oil-containing sludge supply port 140, and the residual sludge from the discharge gap 145 By appropriately selecting the discharge amount of the residual sludge 173, the pressing time of the oil-containing sludge 171 during the pressing can be adjusted.

  In the treatment operation of the oil-containing sludge, the oil-containing sludge is heated to a high temperature and the moisture content of the oil-containing sludge is increased by bringing the oil-containing sludge 171 into contact with the steam 170 immediately after the oil-containing sludge is supplied and during pressing. The solid content and the liquid content in the oil-containing sludge 171 can be easily separated. Therefore, the oil-containing sludge treatment operation can satisfactorily treat the oil in the oil-containing sludge 171.

  Further, in the screw-type oil-containing sludge treatment device 131, the screw shaft (B) 132 is formed with the water vapor supply hole 157, and the oil-containing sludge supply side of the inner cylinder with respect to the length of the inner cylinder. Since the ratio of the length from the cylinder end to the outer cylinder side water vapor supply port (B) is 0.5 or less, the oil-containing sludge is immediately put into the inner cylinder (B) 135 when the oil-containing sludge is introduced into the inner cylinder (B) 135. Therefore, the screw-type oil-containing sludge treatment device 131 is preferably used for the operation of treating the oil-containing sludge.

  In this manner, the oil-containing sludge is treated, the oil-containing sludge is treated, and the residual sludge is separated from the oil-containing sludge.

  The oil / water separation operation is an operation for separating the oil / water generated by the treatment operation of the oil-containing sludge into the oil and the water, but may be any oil / water separation operation usually performed in petroleum refining or the like. Examples of the oil / water separation operation include an operation of separating an oil layer and an aqueous layer into two layers in a separation tank and extracting oil from the upper layer and moisture from the lower layer.

  FIG. 12 shows a cross-sectional view of the oil / water separator 61 for performing the oil / water separation operation. In the oil / water separator 61, the oil / water 70 is supplied from the oil / water transport pipe 68 to the oil / water separator 61. In the oil / water separator 61, the oil component 66 layer is separated into two layers, the upper oil layer and the moisture 67 layer as the lower layer. Then, the oil-water separation operation is performed by discharging the moisture 67 from the lower water layer while discharging the oil 66 from the upper oil layer outside the apparatus.

  In the method for removing sludge in crude oil according to the present invention, the strainer for the crude oil transport pipe according to the method for removing sludge in crude oil according to the present invention is used. Therefore, the filter medium is replaced by rotating the screw (A). Therefore, the oil-containing sludge accumulated in the apparatus can be discharged out of the apparatus. Therefore, conventionally, the amount of sludge collected is too large, and the frequency of replacement of the filter medium increases. Therefore, between the crude oil drilling well and the crude oil primary storage tank where no strainer was installed. In addition, a strainer for a crude oil transport pipe according to the method for removing sludge in crude oil of the present invention can be installed.

  And by installing the strainer for the crude oil transport pipe according to the method for removing sludge in the crude oil of the present invention between the crude oil drilling well and the primary storage tank of the crude oil, the primary storage tank of the crude oil, the transport The oil-containing sludge that settles in the means, the secondary storage tank or the like of the crude oil can be eliminated, or the amount of oil-containing sludge can be reduced. Therefore, according to the method for removing sludge in crude oil of the present invention, the operation of taking out the oil-containing sludge accumulated at the bottom of the primary storage tank of the crude oil, the transport means, the secondary storage tank of the crude oil, etc. It can be eliminated or the labor can be reduced.

  Further, in the method for removing sludge in crude oil according to the present invention, the treatment operation of the oil-containing sludge according to the oil recovery step is performed using the screw-type oil-containing sludge treatment apparatus, whereby the residual sludge in the residual sludge is treated. Since the oil content can be greatly reduced, the residual sludge can be disposed of as general waste.

  According to the present invention, it is possible to easily remove sludge in crude oil.

1, 1a, 1b Strainer for crude oil transport pipe 2 Screw shaft (A)
3 Screw blade (A)
4 Screw (A)
5 Inner cylinder (A)
6 Outer cylinder (A)
7 Stopper (A)
8 Crude oil supply side flange 9 Oil containing sludge discharge side flange 10 Crude oil supply port 11 Steam or wash water supply port 12 on outer cylinder side Oil containing sludge discharge port 14 Oil containing sludge discharge chamber 15 Oil containing sludge discharge gap 18 Inner cylinder (A) Cylinder end 19 on the oil-impregnated sludge discharge side Cylinder end 20 on the crude oil supply side of the inner cylinder (A) Cylinder end 21 on the crude oil supply side of the outer cylinder (A) Cylinder end 25 on the oil-impregnated sludge discharge side of the outer cylinder (A) Screw blade (A) 3 diameter 26 Screw blade (A) 3 pitch 40 Steam 41 Crude oil 42 Crude oil 43 Filtration crude oil 50 Oil-impregnated sludge 50 Sludge removal system 51 Crude oil drilling wells 52, 52a, 52b Crude oil transport pipe 53 Crude oil transportation Pumps 54a, 54b Crude oil supply pipes 55a, 55b, 55c, 55d Valves 56a, 56b Crude oil discharge pipe 57 Primary storage tank 58 for crude oil Screw conveyor 60 Oil impregnated sludge treatment device 61 Oil water separator 62 Residual sludge discharge pipe 63 Oil content discharge pipe 64 Water content discharge pipe 65 Residual sludge 66 Oil content 67 Water content 68 Oil water transfer pipe 70 Oil water 131 Screw type oil content sludge reduction device 132 Screw shaft ( B)
133 Screw blade (B)
134 Screw (B)
137 Stopper (B)
138 Oil-impregnated sludge supply side flange 139 Residual sludge discharge-side flange 140 Oil-containing sludge supply port 141 Outer cylinder side water vapor supply port 142 Residual sludge discharge port 144 Residual sludge discharge chamber 145 Residual sludge discharge gap 147 Compressed space 148 Inner cylinder (B) Residual sludge discharge side cylinder end 149 Inner cylinder (B) oil-impregnated sludge supply side cylinder end 150 Outer cylinder (B) oil-impregnated sludge supply side cylinder end 151 Outer cylinder (B) residue sludge discharge side cylinder end 153 A portion 154 surrounded by the inner cylinder (B) 135 is a range 155 in which the water vapor supply hole 157 is formed 155 The diameter 156 of the screw blade (B) 133 The pitch 157 of the screw blade (B) 133 The water vapor supply hole 158 The screw shaft (B) One end 159 of 132 132 Other end 161 of screw shaft (B) 132 Length 16 of inner cylinder (B) 135 Length 163 from the cylinder end 149 on the oil-impregnated sludge supply side of the inner cylinder (B) 135 to the outer cylinder-side steam supply port 141 to the oil-impregnated sludge supply port 140 from the cylinder end 149 on the oil-impregnated sludge supply side of the inner cylinder (B) 135 Length 164 of oil-impregnated sludge moving direction 170a, 170b Water vapor 171 Oil-impregnated sludge 172 Oil water 173 Residual sludge 175 Exhaust gas 261a, 261b Apex 561a, 561b of screw blade (A) Apex of screw blade (B)

Claims (8)

In the middle of a crude oil transport pipe for transporting crude oil from a crude oil drilling well, a screw shaft, a screw comprising a screw blade spirally provided on the outer periphery of at least a part of the screw shaft, and a crude oil passage hole are provided. , An inner cylinder surrounding the screw, an outer cylinder installed outside the inner cylinder and forming a crude oil discharge gap with the inner cylinder, and a crude oil supply for supplying the crude oil into the inner cylinder The outlet is installed near the end of the inner cylinder on the oil-impregnated sludge discharge side, a stopper for adjusting the discharge of the oil-impregnated sludge, and the crude oil discharged to the crude oil discharge gap is discharged outside the apparatus. A crude oil transport pipe strainer having a crude oil discharge port, an oil-containing sludge discharge port for discharging the oil-containing sludge discharged from the inner cylinder to the outside of the apparatus, and a driving means for rotating the screw. The original The crude oil is supplied from the crude oil supply port of the strainer for the transport pipe, the crude oil is filtered, the filtered crude oil is discharged from the crude oil discharge port, and the oil-containing sludge in the inner cylinder is discharged from the oil-containing sludge discharge port. Crude oil filtration process;
An oil recovery step of separating the oil from the oil-containing sludge and recovering the oil;
A method for removing sludge in crude oil, characterized in that   2. The removal of sludge in crude oil according to claim 1, wherein the strainer for the crude oil transport pipe has a supply port for water vapor or washing water on the outer cylinder side for supplying water vapor or washing water into the outer cylinder. Method.   After contacting the oil-containing sludge with water vapor at 100 to 200 ° C., the oil-containing sludge is squeezed, separated into oil water and sludge, then separated into oil and water, and the oil content is recovered. The method for removing sludge in crude oil according to claim 1, wherein a recovery step is performed.   The method for removing sludge from crude oil according to claim 3, wherein water vapor at 100 to 200 ° C is brought into contact with the oil-containing sludge during pressing. A screw shaft having a water vapor supply hole, and a screw comprising a screw blade spirally provided on the outer periphery of at least a part of the screw shaft;
An inner cylinder having an oil water passage hole and surrounding the screw;
An outer cylinder installed outside the inner cylinder and forming an oil-water discharge gap with the inner cylinder;
An oil-containing sludge supply port for supplying oil-containing sludge into the inner cylinder;
An outer cylinder side water vapor supply port for supplying water vapor into the outer cylinder;
A stopper that is installed in the vicinity of the cylinder end of the inner cylinder on the residue sludge discharge side, and that forms a residue sludge discharge gap with the cylinder end on the residue sludge discharge side of the inner cylinder;
An oil water discharge port for discharging the oil water discharged into the oil water discharge gap to the outside of the device;
Drive means for rotationally driving the screw;
In a processing apparatus for oil-containing sludge having
While supplying the oil-containing sludge from the oil-containing sludge supply port, by supplying water vapor to the screw shaft and the outer cylinder side water vapor supply port, the oil-containing sludge is compressed into oil water and residual sludge. The method for removing sludge in crude oil according to claim 4, wherein the oil recovery step is performed by separating and then separating the oil water into oil and moisture.   The ratio of the length from the cylinder end on the oil-impregnated sludge supply side of the inner cylinder to the outer cylinder-side water vapor supply port with respect to the length of the inner cylinder is 0.5 or less. A method for removing sludge from crude oil.   The method for removing sludge in crude oil according to any one of claims 5 and 6, wherein a ratio of a pitch of the screw blades to a diameter of the screw blades is 0.5 to 1.25.   8. The stopper according to claim 5, wherein the stopper is a stopper through which the screw shaft is inserted, slidably attached to the screw shaft, and a pressure regulating member attached to the back surface. 2. A method for removing sludge from crude oil according to item 2.

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