JP6609845B2 - Lubricant application device - Google Patents

Description

  The present invention relates to a lubricant application device.

  For example, in a sewage treatment plant, highly viscous substances such as a sewage sludge dewatering cake obtained by dewatering sludge separated from wastewater are conveyed by a pipeline. This makes it possible to transport the dehydrated cake without polluting the environment as compared with the belt conveyor.

  In recent years, with the improvement of the performance of the dehydrator, the moisture content of the dehydrated cake is low and the viscosity is very high. Is low. On the other hand, a technique is known in which a lubricant such as water or a lubricant is injected between a pipeline and a dehydrated cake to smoothly convey the dehydrated cake (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 7-97048

  In the technique described in Patent Document 1, the penetration of the lubricant into the dehydrated cake is suppressed by injecting a kneaded part of the dehydrated cake between the dehydrated cake and the pipeline. However, there are cases where the lubricant still penetrates into the dehydrated cake, and there is a demand for a technique that can suppress the penetration of the lubricant into the dehydrated cake.

  An object of the present invention is to provide a lubricant application apparatus that can suppress the penetration of a lubricant into the inside of a highly viscous substance and smoothly convey the highly viscous substance through a pipeline.

  According to the first aspect of the present invention, the lubricant application device is a lubricant application device that applies a lubricant to the outer periphery of a high-viscosity material conveyed in a pipeline, and the high-viscosity material is disposed on the inner periphery side. A first application unit comprising: a cylindrical first cylinder part to be conveyed; and a coating agent supply part that applies a coating agent to the outer periphery of the highly viscous substance from the outer peripheral side of the first cylinder part; A cylindrical second cylinder part connected to the downstream side in the direction in which the high-viscosity substance is conveyed and the high-viscosity substance coated with the coating agent is conveyed to the inner peripheral side, and a second cylinder part And a second application part comprising an additive supply part for supplying an additive to the outer periphery of the highly viscous material to which the coating agent is applied from the outer peripheral side, and the additive cures the coating agent. It functions as a lubricant.

  According to such a configuration, after the coating agent is applied to the outer periphery of the high-viscosity substance, the coating agent is cured by the additive, so that the high-viscosity substance is circumferentially formed like sausage skin. A wrapping film (cured film obtained by curing the coating agent) is formed. Thereby, when an additive functions as a lubricant, it can suppress that an additive osmose | permeates the inside of a highly viscous substance. Further, since the additive functions as a lubricant, a highly viscous substance can be smoothly conveyed, and can be conveyed by a pump with a small output.

  In the lubricant application device, one or both of the first cylinder part and the second cylinder part may include a slit extending in the circumferential direction, and the coating agent may be applied or the additive may be supplied through the slit. According to such a configuration, the coating agent or additive can be more uniformly applied around the highly viscous material.

  In the lubricant application device, the slit may be formed in a spiral shape. According to such a configuration, the coating agent or additive can be more uniformly applied around the highly viscous material.

  In the lubricant application device, the slit may be formed by a gap between the wire rods of a helical coil spring, and the first application part or the second application part may include an adjusting unit that adjusts the coil spring to be extendable and contractible.

  According to such a structure, the space | interval of the wire rod of a coil spring, ie, the width | variety of the clearance gap between wire rods, can be changed according to the property of a highly viscous substance, and the characteristic of a coating material and an additive. That is, the contact area to the highly viscous substance of the coating agent and additive to be applied can be adjusted. Thereby, lubricity can be efficiently secured while minimizing the influence on the properties of the highly viscous substance.

  In the lubricant application apparatus, the coil spring may be formed of a coil spring having a triangular, trapezoidal, rectangular, or semicircular cross section, and the inner surface of the coil spring may be the largest surface among flat surfaces along the conveying direction. According to such a configuration, the coating agent or additive can be applied or supplied effectively without hindering the flow of the highly viscous material.

  In the lubricant application apparatus, the highly viscous substance may be sludge, the coating agent may be a thermosetting resin, and the additive may be warm water equal to or higher than the curing temperature of the thermosetting resin.

  According to such a configuration, the thermosetting resin applied to the outer surface of the sludge can be reliably cured into a film shape with warm water, and the warm water functions as a lubricant as it is without penetrating the cured film. Therefore, even in the case of long-distance conveyance, sludge can be smoothly conveyed.

According to the present invention, after the coating agent is applied on the upstream side, the coating agent is cured by the additive, thereby forming a film that wraps the highly viscous substance in a circumferential shape. Thereby, when an additive functions as a lubricant, it can suppress that an additive osmose | permeates the inside of a highly viscous substance.
Further, since the additive functions as a lubricant, a highly viscous substance can be smoothly conveyed, and can be conveyed by a pump with a small output.

It is a block diagram of a sludge incineration plant provided with the lubricant application device of a first embodiment of the present invention. It is a schematic sectional drawing of the lubricant coating device of 1st embodiment of this invention. It is III-III sectional drawing of FIG. It is a graph which shows the hardening characteristic of the thermosetting resin after warm water injection | pouring. It is a schematic sectional drawing of the lubricant application | coating apparatus of 2nd embodiment of this invention. It is VI-VI sectional drawing of FIG. It is a side view of the coil spring of the 2nd application part of 2nd embodiment of this invention. It is an enlarged view of the coil spring of the 2nd application part of 2nd embodiment of this invention. It is sectional drawing which shows the modification of the coil spring of the 2nd application part of 2nd embodiment of this invention. It is sectional drawing which shows the modification of the coil spring of the 2nd application part of 2nd embodiment of this invention. It is sectional drawing which shows the modification of the coil spring of the 2nd application part of 2nd embodiment of this invention. It is a schematic sectional drawing of the lubricant application | coating apparatus of 3rd embodiment of this invention.

[First embodiment]
Hereinafter, the lubricant application device of the first embodiment of the present invention will be described in detail with reference to the drawings. In the following description, it is assumed that the lubricant application device is provided in the pipeline of the sludge incineration plant. Specifically, the lubricant application device is provided in a pumping device that pumps a highly viscous substance such as a sewage sludge dewatering cake (hereinafter, dewatered cake) into a pipeline. The lubricant application device is a device that applies a lubricant to the outer periphery of the dewatered cake conveyed in the pipeline.

As shown in FIG. 1, a sludge incineration plant 100 according to this embodiment includes a sludge dewatering machine 101 that dehydrates sludge P1 separated from waste water to form a dehydrated cake P2, and a sludge incinerator 102 that incinerates the dehydrated cake P2. And a pipeline 2 that transports the dewatered cake P2 that is transported to the sludge incinerator 102, and a pumping device 103 that pumps the dewatered cake P2 in the pipeline 2.
Moreover, the sludge incineration plant 100 supplies the additive L (in this embodiment, warm water produced | generated using the incineration heat of the sludge incinerator 102) to the lubricant coating device 1 which comprises the pumping apparatus 103. 104. The additive supply line 104 can be provided with a flow rate adjusting valve that adjusts the flow rate of the additive L flowing through the additive supply line 104.

The sludge dewatering machine 101 is a device for dewatering the sludge P1 sent from a sludge storage tank (not shown). As the sludge dehydrator 101, a centrifugal separator or a screw press type dehydrator can be employed. The sludge P1 is dehydrated by the sludge dehydrator 101, for example, becomes a dehydrated cake P2 having a moisture content of 60%.
A sludge dryer for drying the dewatered cake P2 may be provided on the upstream side of the sludge incinerator 102.

The pressure feeding device 103 of this embodiment includes a hopper 105 into which the dehydrated cake P2 is charged, a pressure feed pump 106 that discharges the dehydrated cake P2 supplied from the hopper 105, and a dehydrated cake P2 that is conveyed through the pipeline 2. And a lubricant application device 1 for applying a coating agent and an additive functioning as the above.
The lubricant application device 1 is disposed on the pipeline 2 at a position as close as possible to the pumping pump 106. That is, the lubricant application device 1 is disposed at a position where the lubricant can be applied to the dewatered cake P2 at the earliest possible stage.

  As the pumping pump 106, a piston type, plunger type, or diaphragm type reciprocating pump, or a positive displacement pump such as a screw type can be used.

The lubricant application device 1 is a device that reduces the frictional resistance between the pipeline 2 and the dehydrated cake P <b> 2 by applying a lubricant to the outer periphery of the dehydrated cake P <b> 2 conveyed in the pipeline 2. Hereinafter, the direction in which the dewatered cake P2 is transported is referred to as a transport direction D.
As shown in FIG. 2, the lubricant application device 1 includes a first application unit 10 that applies the coating agent C1 to the dewatered cake P2 that is conveyed in the pipeline 2, and a downstream direction D2 in the conveyance direction of the first application unit 10. And a second application unit 20 that applies the additive L to the dewatered cake P2 that has been connected and passed through the first application unit 10.

The coating agent C1 of this embodiment is a thermosetting resin. Specifically, the coating agent C1 is a polyurethane resin (polyisocyanate compound). The polyurethane resin has a curing reaction temperature of 10 ° C. to 280 ° C. and is a liquid resin at room temperature. Moreover, the time until the curing is completed is 10 seconds to 24 hours.
The thermosetting resin is not limited to a polyurethane resin, but may be, for example, a silicon resin (curing reaction temperature: 80 ° C. to 180 ° C., time to complete curing: 60 seconds or less), a melamine resin, a phenol resin (curing reaction temperature: 150). C, time until completion of curing: 30 to 60 seconds) and the like can be employed.

The additive L of this embodiment is warm water (hot water, hot water). The temperature of the hot water is appropriately adjusted according to the type of the coating material C1. For example, when a polyurethane resin is employed as the coating agent C1, the temperature of the hot water is adjusted to about 80 ° C. that is equal to or higher than the curing temperature of the polyurethane resin.
Since the lubricant application device 1 of the present embodiment uses hot water generated by using the incineration heat of the sludge incinerator 102 as the additive L, it is easily adjusted to a temperature suitable for the curing characteristics of the coating agent C1. be able to.

The first application unit 10 includes a cylindrical first cylinder part 11 and a coating agent supply part 12 provided on the outer peripheral side of the first cylinder part 11.
As for the 1st cylinder part 11, the conveyance direction upstream D1 is connected with the pipeline 2. FIG. That is, the dewatered cake P <b> 2 is conveyed to the inner peripheral side of the first cylinder portion 11 through the pipeline 2. The first tube portion 11 includes a cylindrical tube body 11a, flanges 11b provided at both ends of the tube body 11a in the transport direction D, and a first slit 13 formed in the tube body 11a. doing. The inner surface of the first cylinder portion 11 has a cylindrical shape. The first cylinder part 11 and the pipeline 2 are connected by a flange 11 b of the first cylinder part 11 and a flange 2 b of the pipeline 2.

The first slit 13 extends in a spiral shape in the circumferential direction of the cylindrical body 11a. The first slit 13 is a slit (a through hole, which is a narrow gap or a long hole) formed so as to penetrate the outer surface and the inner surface of the cylindrical portion main body 11a. The width | variety of the conveyance direction D of the 1st slit 13 is formed according to the property of the dewatering cake P2, and the kind of coating material C1. The 1st slit 13 is formed so that the outer periphery of the 1st cylinder part 11 may make 4 rounds, for example.
Note that the first slit 13 does not need to be formed in a spiral shape, and a plurality of slits that substantially circle the first cylindrical portion 11 may be formed. Moreover, the 1st slit 13 may arrange | position many holes which penetrate the outer surface and inner surface of the cylinder part main body 11a on the same periphery of the cylinder part main body 11a.

  The coating agent supply unit 12 includes a coating agent tank 14, a housing 15 provided on the outer peripheral side of the first cylinder portion 11, and a coating agent line 16 that connects the coating agent tank 14 and the housing 15. ing. The coating agent tank 14 stores a coating agent C1 (thermosetting resin). The coating agent line 16 is provided with a pump (not shown), and the coating agent C1 stored in the coating agent line 16 is sent into the housing 15 by the action of the pump.

  The housing 15 is a member that forms a sealed space R1 on the outer peripheral side of the first cylindrical portion 11, and has a cylindrical housing main body 15a and a pair of sealing portions 15b that seal both ends of the housing main body 15a. doing. The housing body 15 a is formed with an introduction port 15 c for introducing the coating agent C <b> 1 into the housing 15. The coating line 16 is connected to the inlet 15c of the housing body 15a.

  The housing 15 is formed so as to cover the first slit 13. That is, one sealing portion 15 b is provided on the upstream side D <b> 1 of the slit 13 in the transport direction, and the other sealing portion 15 b is provided on the downstream side D <b> 2 in the transport direction of the first slit 13. In other words, the first slit 13 is formed so as to communicate the sealed space R <b> 1 formed by the housing 15 and the internal space of the first cylindrical portion 11.

The second application unit 20 has substantially the same configuration as the first application unit 10.
The second application part 20 has a cylindrical second cylinder part 21 and an additive supply part 22. The upstream side D <b> 1 in the transport direction of the second cylinder part 21 is connected to the first cylinder part 11. A downstream side D <b> 2 in the transport direction of the second cylindrical portion 21 is connected to the pipeline 2.
The second cylinder part 21 includes a cylindrical cylinder part main body 21a, flanges 21b provided at both ends in the conveyance direction D of the cylinder part main body 21a, and a second slit 23 formed in the cylinder part main body 21a. doing.

  The configuration of the second slit 23 is the same as that of the first slit 13 of the first application unit 10. Since the additive L becomes a lubricant, the length of the second slit 23 is longer than that of the first slit 13 of the first application unit 10 so that a sufficient amount of lubricant can be supplied. For example, the length of the second slit 23 can be 1.5 times the length of the first slit 13. When the amount of the additive L is small, the coating C1 can be cured and the function as a lubricant can be sufficiently achieved, and the length of the second slit 23 may be the same as the length of the first slit 13. It can be short.

  The additive supply unit 22 of the second application unit 20 has an additive supply line 104 into which an additive L that is hot water generated in the sludge incinerator 102 is introduced. The additive supply line 104 is connected to an introduction port 15c-1 formed in the housing body 15a-1. That is, the additive supply part 22 of the 2nd application part 20 of this embodiment supplies the warm water produced | generated in the sludge incinerator 102 to sealed space R2 in the housing 15-1.

Next, the operation of the pressure feeding device 103 of this embodiment will be described.
The dewatered cake P <b> 2 supplied to the hopper 105 is pumped into the pipeline 2 by the pump pump 106. The dehydrated cake P <b> 2 conveyed in the pipeline 2 is sent in the conveyance direction D and reaches the inside of the first cylinder portion 11 of the first application unit 10.

The coating agent C <b> 1 is applied to the outer periphery of the dehydrated cake P <b> 2 conveyed in the conveyance direction D by the first application unit 10. Specifically, the coating material C <b> 1 supplied from the coating material supply unit 12 is filled into the sealed space R <b> 1 in the housing 15, and then enters the inside of the first cylinder portion 11 through the first slit 13. By reaching the outer periphery of the dehydrated cake P2, the coating agent C1 is applied to the outer periphery of the dehydrated cake P2 from the outer peripheral side of the first cylinder portion 11.
Since the slit 13 extends in the circumferential direction, the coating agent C1 is applied over the entire circumference in the circumferential direction of the dewatered cake P2.

Next, the additive L is applied to the outer periphery of the dehydrated cake P <b> 2 having the coating C <b> 1 applied to the outer periphery thereof at the second application unit 20. As a result, as shown in FIG. 3 which is a cross-sectional view taken along the line III-III of FIG. 2, the coating C1 is cured to form a film C2 (cured coating layer) that wraps the dewatered cake P2 in a circumferential shape. The That is, the thermosetting resin applied to the outer peripheral surface of the dewatering cake P2 is cured by the heat of hot water to form a film.
Further, the additive L (warm water) injected from the second slit 23 of the second application part 20 exists in the gap S between the film C2 which is the cured coating material C1 and the inner periphery of the second cylinder part 21. And function as a lubricant.

Here, the curing characteristics of the thermosetting resin after the hot water injection will be described. FIG. 4 is a graph showing the curing characteristics of the thermosetting resin after injection of hot water, with the horizontal axis representing time and the vertical axis representing the hardness of the thermosetting resin.
As shown in FIG. 4, the thermosetting resin begins to gel immediately after the injection of warm water (time 0 to t1). When the thermosetting resin is gelled, the thermosetting resin exhibits a water repellent function.
Next, curing of the thermosetting resin proceeds with time. That is, the curing of the thermosetting resin proceeds and the thermosetting resin changes from a gel state to a solid state (time t1 to t2).
Next, when the curing is completed, the thermosetting resin thereafter maintains a certain hardness regardless of the passage of time (time t2).

According to the above embodiment, after the coating agent C1 is applied to the outer periphery of the dewatering cake P2 on the upstream side D1 in the transport direction, the coating material C1 is cured by the additive L, whereby the dewatering cake P2 that is a highly viscous material. Is formed in a circumferential shape. Thereby, when the additive L functions as a lubricant, it is possible to suppress the additive L from penetrating into the dehydrated cake P2.
Further, since the additive L functions as a lubricant, the dehydrated cake P2 can be smoothly conveyed, and can be conveyed by the pressure-feed pump 106 having a small output.

  Further, since the first slit 13 and the second slit 23 are formed in a spiral shape, the coating agent C1 and the additive L can be applied in a spiral shape. That is, the coating agent C1 and the additive L can be applied more uniformly around the dewatering cake P2.

  Moreover, by using the hot water produced | generated in the sludge incinerator 102 as the additive L, the energy discharged | emitted from the sludge incinerator 102 can be used effectively.

In the above embodiment, a thermosetting resin is used as the coating material C1 and warm water is used as the additive L. However, the present invention is not limited to this. As a combination of the coating agent C1 and the additive L, the additive L may cure the coating agent C1 and function as a lubricant. For example, the coating material C1 may be a thermoplastic resin, and the additive L may be cold water.
Moreover, although it was set as the structure which supplies warm water from the sludge incinerator 102, it is not restricted to this, You may prepare warm water supply apparatuses, such as a boiler separately. Moreover, it is good also as a structure which supplies a vapor | steam instead of warm water.

[Second Embodiment]
Hereinafter, the lubricant application device 1B of the second embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, differences from the first embodiment described above will be mainly described, and description of similar parts will be omitted.
As shown in FIG. 5, the lubricant application device 1 </ b> B of the second embodiment has a first application part 10 </ b> B having a tapered inner cylinder 61 and a second application part 20 </ b> B having a helical coil spring 37. ing.

The first application unit 10 </ b> B has a tapered inner cylinder 61 connected to the pipeline 2 on the upstream side D <b> 1 in the transport direction, and an outer cylinder 62 disposed on the radially outer side of the tapered inner cylinder 61.
The outer cylinder 62 has a cylindrical outer cylinder main body 62a and outer cylinder flanges 62b provided at both ends of the outer cylinder main body 62a. The outer cylinder main body 62 a is provided with an introduction port 62 c connected to the coating agent line 16.

  The tapered inner cylinder 61 includes a tapered inner cylinder body 61a having a tapered shape whose diameter decreases toward the downstream side D2 in the transport direction, and an inner portion of the tapered inner cylinder 61a provided at the end of the tapered inner cylinder body 61a on the upstream side D1 in the transport direction. A cylindrical flange 61b. The inner diameter of the tapered inner cylinder body 61a on the upstream side D1 in the transport direction is substantially the same as the inner diameter of the pipeline 2. The inner diameter of the tapered inner cylinder body 61a on the downstream side D2 in the transport direction is smaller than the inner diameter of the first pipe 32.

  The length of the tapered inner cylinder 61 in the conveyance direction D and the length of the outer cylinder 62 in the conveyance direction D are substantially the same. The taper angle of the tapered inner cylinder 61 is a circumferential direction between the end of the tapered inner cylinder body 61a on the downstream side D2 in the transport direction and the end of the first pipe 32 of the second application unit 20 on the upstream side D1 in the transport direction. The angle is such that a predetermined gap G extending in the direction is formed. The gap G corresponds to the first slit 13 of the first embodiment.

The tapered inner cylinder flange 61 b is connected to the pipeline 2 so that the entire amount of the dewatered cake P <b> 2 conveyed through the pipeline 2 is introduced radially inward of the tapered inner cylinder 61.
The outer cylinder flange 62b on the upstream side D1 in the transport direction is connected to the tapered inner cylinder flange 61b. The outer cylinder flange 62b on the downstream side D2 in the transport direction is connected to the first pipe 32 of the second application unit 20.

The second application part 20B of the present embodiment is connected to the first pipe 32 into which the dewatered cake P2 and the coating agent C1 that have passed through the first application part 10B are introduced, and the end of the first pipe 32 on the downstream side D2 in the transport direction. The coiled spring 37, the cylindrical inner cylinder 38 connected to the downstream side of the coiled spring 37, and the second that is disposed on the downstream side of the inner cylinder 38 and discharges the dehydrated cake P2 coated with the additive L. The piping 34, the casing 39 in which the additive L supplied from the additive supply part 22 is accommodated, and the driving device 40 that moves the inner cylinder 38 in the transport direction D to expand and contract the coil spring 37 are provided. .
The 1st piping 32, the coil spring 37, and the 2nd piping 34 are corresponded to the 2nd cylinder part 21 of 1st embodiment, and the clearance gap between the wire materials 57 of the coil spring 37 is the 2nd slit of 1st embodiment. 23.
Although the 2nd application part 20B has the three drive devices 40, only one drive device 40 is shown in FIG.

The first pipe 32 is a cylindrical pipe connected to the outer cylinder 62 of the first application part 10B. The first pipe 32 is introduced with the coating agent C1 supplied around the dewatered cake P2 via the dewatered cake P2 and the gap G.
The first pipe 32 and the coil spring 37 are maintained so that watertightness is maintained between the cylindrical surface inside the coil spring 37 (first surface 58, see FIG. 7) and the upper portion of the outer peripheral surface 32a of the first pipe 32. For example, it is joined by welding.

  The casing 39 includes a cylindrical casing body 41 that is coaxial with the axis A, a side wall 42 that is connected to an end of the casing body 41 on the upstream side D1 in the transport direction, and a downstream side D2 of the casing body 41 in the transport direction. It has a base portion 43 connected to the end portion, and an inlet 41 a that is connected to the additive supply line 104 and introduces the additive L into the casing 39.

The side wall 42 is a plate-like member, and is connected to the outer peripheral surface 32 a of the first pipe 32 so that the main surface of the side wall 42 is orthogonal to the axis A.
The base portion 43 is a plate-like member, and is connected to the casing body 41 so that the main surface of the base portion 43 is parallel to the side wall 42. The base portion 43 is formed with a through portion 44 through which the inner cylinder 38 is inserted.
A space formed by the side wall 42, the casing body 41, and the base portion 43 is a sealed space R4 to which the additive L is supplied.

The second pipe 34 is supported by the base portion 43 via the support member 46. The support member 46 is a stay extending in the conveyance direction D so as to connect the flange portion 47 formed so as to project from the second pipe 34 in the radial direction of the axis A and the base portion 43. Part 48. A plurality of stay portions 48 are provided in the circumferential direction of the axis A. The second application part 20B has three stay parts 48, but only one stay part 48 is shown in FIG.
The end of the second pipe 34 on the downstream side D <b> 2 in the transport direction is connected to the pipeline 2 via an extension pipe 54.

  The inner cylinder 38 is a cylindrical member that is supported by the driving device 40 fixed to the base portion 43 so as to be movable in the transport direction D. The inner cylinder 38 is coaxial with the axis A. The end of the inner cylinder 38 on the upstream side D <b> 1 in the transport direction is connected to the coil spring 37. The inner cylinder 38 and the coil spring 37 are, for example, welded so that watertightness is maintained between the inner cylindrical surface (first surface 58, see FIG. 7) of the coil spring 37 and the outer peripheral surface 38a of the inner cylinder 38. Are joined by. The dewatered cake P <b> 2 that has passed through the radially inner side of the coil spring 37 is introduced into the second pipe 34 via the inner cylinder 38.

  A space between the outer peripheral surface 38 a of the inner cylinder 38 and the inner peripheral surface of the through portion 44 of the base portion 43 is sealed by a first seal portion 49. For example, an oil seal can be adopted as the first seal portion 49. When the inner cylinder 38 is moved in the transport direction D by the driving device 40, the outer peripheral surface 38 a of the inner cylinder 38 slides on the inner surface of the first seal portion 49.

  The drive device 40 may employ a device such as an air cylinder having a cylinder 50 having a piston inside and a rod 51 provided integrally with the piston. The driving device 40 moves the inner cylinder 38 in the transport direction D via the plate 52 connected to the outer peripheral surface 38 a of the inner cylinder 38.

As shown in FIG. 6, which is a VI-VI sectional view of FIG. 5, the plate 52 is formed so as not to interfere with the stay portion 48 of the support member 46.
Although three drive devices 40 and stay portions 48 are arranged here, two or more drive devices 40 and stay portions 48 may be arranged, and in this case, the plate 52 does not interfere with the stay portions 48. Formed.

  The inner cylinder 38 is formed so that the outer diameter of the inner cylinder 38 is slightly smaller than the inner diameter of the second pipe 34. The inner cylinder 38 is formed so as to slide on the inner surface of the second seal portion 53 provided on the inner peripheral surface of the second pipe 34. As the second seal portion 53, for example, an O-ring can be adopted.

Next, details of the coil spring 37 will be described.
As shown in FIG. 7, the coil spring 37 is a wedge wire in which a wire rod 57 is spirally wound. The cross-sectional shape of the wire 57 of this embodiment is a triangle. The wire 57 has a first surface 58 that is a spiral cylindrical surface facing the inside of the coil spring 37 (inside the radial direction of the axis), and faces the outside of the coil spring 37 (outside in the radial direction of the axis). And a pair of second surfaces 59 that are helically inclined surfaces having an acute angle θ (see FIG. 8).
In other words, the inner surface of the coil spring 37 is the largest surface among the flat surfaces along the transport direction D.
The first surface 58 is a cylindrical surface coaxial with the axis A. The coil spring 37 is formed so that the first surfaces 58 of the wires 57 adjacent in the axial direction are on the same cylindrical surface. That is, the coil spring 37 is formed such that the entire inner surface of the coil spring 37 forms a cylindrical surface.

Next, the operation of the lubricant application device 1B of this embodiment will be described.
The coating agent C1 is applied to the dehydrated cake P2 transported in the transport direction D by the first application unit 10B. Specifically, the coating agent C1 introduced from the introduction port 62c is filled into the space R3 between the outer cylinder 62 and the tapered inner cylinder 61, and then discharged radially inward through the gap G. And applied to the outer periphery of the dewatering cake P2.

  Next, the additive L is applied to the dehydrated cake P2 to which the coating agent C1 has been applied. Specifically, the additive L supplied into the casing 39 passes between the wire rods 57 (slits 13B) of the coil spring 37 and is applied to the outer periphery of the dewatered cake P2. Thereby, the coating agent C1 is cured and the additive L functions as a lubricant.

  The operator can adjust the width of the slit 13 </ b> B between the wire members 57 of the coil spring 37 constituting the second application unit 20 </ b> B by operating the driving device 40. That is, the driving device 40 functions as an adjusting unit that adjusts the coil spring 37 so that the coil spring 37 can be expanded and contracted, and adjusts the width of the slit 13B between the wire rods 57 of the coil spring 37. Thereby, the contact area of the additive L with respect to the dewatering cake P2 can be changed.

  Thereby, the additive L, that is, a lubricant film is stretched around the inner wall surface of the pipeline 2 while minimizing the influence on the properties of the dewatered cake P2, and the lubricity can be efficiently secured.

  Further, as shown in FIG. 8, by making the cross-sectional shape of the coil spring 37 triangular, the gap becomes smaller as the shape of the slit 13B moves toward the inner surface. For this reason, the additive L can be pressurized and pushed out around the dehydrated cake P2.

  Note that the cross-sectional shape of the wire 57 is not limited to a triangular shape. For example, like the coil spring 37B of FIG. 9, the cross-sectional shape of the wire 57B may be a trapezoid.

Further, like the coil spring 37C of FIG. 10, the cross-sectional shape of the wire 57C may be a rectangle. According to such a configuration, the strength in the radial direction of the coil spring 37C, which is a wedge wire, increases, so that it can withstand a high injection pressure.
Further, in the present embodiment, when the operation is stopped by periodic inspection or the like, the coil spring 37C can be contracted to bring the wire rods 57C into close contact with each other and the slit 13B can be closed. At that time, when the cross-sectional shape of the wire 57C is rectangular as shown in FIG. 10, since the contact area between the wires 57C increases (becomes surface contact instead of line contact), the sealing property is increased and the dewatered cake P2 is slit. Intrusion into 13B can be prevented.

Further, like the coil spring 37C in FIG. 11, the cross-sectional shape of the wire 57C may be a semicircular shape. That is, in view of the manufacturing cost of the coil spring 37 and the like, the cross-sectional shape of the wire 57 can be a triangle, a trapezoid, or a semicircle.
Since the inner surface of the coil spring 37 is the largest surface among the flat surfaces along the transport direction D, resistance to the flow of the dewatered cake P2 can be reduced.

[Third embodiment]
Hereinafter, a lubricant application device according to a third embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, differences from the second embodiment described above will be mainly described, and description of similar parts will be omitted.
As shown in FIG. 12, the second application part 20C of the lubricant application device 1C of the third embodiment is the same as the second application except that the side wall 42 of the second embodiment becomes a flange 55 that also serves as a side wall in the third embodiment. It is the same structure as the 2nd application part 20B of embodiment (The same numbering is also given to the same structure as 2nd embodiment in 3rd embodiment).
In addition, the first application unit 10C of the third embodiment has a configuration in which the second application unit 20C is arranged in a mirror surface, whereas the inlet 41a of the second application unit 20C is connected to the additive supply line 104. The introduction port 41a of the first application part 10C is different only in that it is connected to the coating line 16.

That is, the first application unit 10C of the present embodiment is configured to apply the coating agent C1 to the dehydrated cake P2 through the slit 13 of the coil spring 37. 10 C of 1st application parts of this embodiment arrange | position the 2nd piping 34 in the conveyance direction upstream D1, and arrange | position the 1st piping 32 in the conveyance direction downstream D2.
Between the sealed space R4 of the first application part 10C and the sealed space R4 of the second application part 20C, flanges 55 each serving as a side wall are provided, and the flanges 55 are connected by bolts and integrated. Yes. By providing the flange 55, the coating agent C1 in the sealed space R4 of the first application part 10C and the additive L in the sealed space R4 of the second application part 20C are not mixed.

  According to the above embodiment, not only the additive L but also the coating material C1, the contact area of the applied coating material C1 can be adjusted. Therefore, according to this configuration, coating corresponding to each of the characteristics of the coating agent C1 and the characteristics of the additive L is possible, and therefore, when the coating agent C1 and the additive L are selected, the combination range is widened. Can be selected. Therefore, it becomes easy to select a low-cost combination of the coating agent C1 and the additive L.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like within a scope not departing from the gist of the present invention. .

DESCRIPTION OF SYMBOLS 1, 1B, 1C Lubricant coating device 2 Pipeline 10 1st application part 11 1st cylinder part 11a Tube part main body 11b Flange 12 Coating agent supply part 13 1st slit 14 Coating agent tank 15, 15-1 Housing 15a, 15a- DESCRIPTION OF SYMBOLS 1 Housing main body 15b, 15b-1 Sealing part 15c, 15c-1 Inlet port 16 Coating agent line 20 Second application part 21 Second cylinder part 22 Additive supply part 23 Second slit 32 First pipe 34 Second pipe 37 Coil spring 38 Inner cylinder 39 Casing 40 Drive device 41 Casing body 41a Inlet port 42 Side wall 43 Base portion 44 Through portion 46 Support member 47 Flange portion 48 Stay portion 49 First seal portion 50 Cylinder 51 Rod 52 Plate 53 Second seal portion 55 Flange 57 Wire 58 First surface 59 Second surface 61 Tapered inner cylinder 1a tapered inner barrel body 61b tapered inner barrel flange 62 outer cylinder 62a outer cylinder main body 62b outer cylinder flange 62c inlet 100 sludge incineration plants 101 sludge dewatering machine 102 sludge incinerator 103 pumping device 104 additive supply line (hot water line)
105 Hopper 106 Pressure Pump C1 Coating Agent D Conveying Direction L Additive P1 Sludge P2 Dehydrated Cake (Highly Viscous Substance)
R1, R2, R3, R4 sealed space

Claims (6)

A lubricant application device for applying a lubricant to the outer periphery of a highly viscous material conveyed in a pipeline,
A cylindrical first cylinder part in which the high-viscosity substance is conveyed to the inner peripheral side; a coating agent supply part that applies a coating agent to the outer periphery of the high-viscosity substance from the outer peripheral side of the first cylinder part; A first application unit comprising:
A cylindrical second connected to the downstream side in the direction in which the high-viscosity material is conveyed with respect to the first application part, and wherein the high-viscosity material to which the coating agent has been applied is conveyed to the inner peripheral side. A second application unit comprising: a cylinder part; and an additive supply part that supplies an additive to the outer periphery of the highly viscous material coated with the coating agent from the outer peripheral side of the second cylinder part. ,
The additive hardens the coating agent and functions as a lubricant.   The lubricant application device according to claim 1, wherein the first cylinder part or the second cylinder part includes a slit extending in a circumferential direction, and the application or the supply is performed through the slit.   The lubricant application device according to claim 2, wherein the slit is formed in a spiral shape. The slit is formed by a helical coil spring,
The lubricant application device according to claim 3, wherein the first application unit or the second application unit further includes an adjusting unit that adjusts the coil spring to be extendable and contractible.   5. The coil spring according to claim 4, wherein the coil spring is formed of a triangular, trapezoidal, rectangular, or semicircular coil spring, and the inner surface of the coil spring is a maximum surface among flat surfaces along the conveying direction. The lubricant application device described.   The said highly viscous substance is sludge, the said coating agent is a thermosetting resin, and the said additive is warm water more than the curing temperature of the said thermosetting resin, The Claim 1 to Claim 5 characterized by the above-mentioned. The lubricant application device according to any one of the above.

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