JP3203828U - Anti-corrosion structure of solvent tank - Google Patents

Abstract

The present invention relates to an anticorrosion method for a solvent tank that stores an organic solvent such as ethyl acetate, toluene, xylene, and acetone. For example, a solvent tank that protects the inside of the tank with a solvent-resistant material after FRP is applied to the solvent tank. Provide anti-corrosion structure.
An anti-corrosion structure for a solvent tank comprising: an existing steel tank 1; and a fiber reinforced composite material provided on an inner periphery of the steel tank 1 to prevent solvent leakage from the steel tank 1. The fiber-reinforced composite material is characterized in that ceramic coating, glass coating, plasma melt coating, fluorine resin lining, or phenol lining is performed on the inner peripheral surface of the fiber reinforced composite material.
[Selection] Figure 1

Description

The present invention relates to an anticorrosion structure for a solvent tank that stores an organic solvent such as ethyl acetate, toluene, xylene, and acetone.

  Today, organic solvents such as ethyl acetate, toluene, xylene, and acetone are widely used in operations such as painting, cleaning, and printing. For example, toluene is widely used as a solvent for paints, paint thinners, printing inks, adhesives and the like, and xylene is also used as a solvent for adhesives and paints. Ethyl acetate is used as a solvent for paints such as thinner and lacquer, and is widely used as a manicure remover along with acetone. Furthermore, organic solvents such as benzene, methane, alcohol, ethane, ethylene, and ketone are also used as industrial solvents, and these organic solvents are stored in dedicated containers and tanks.

  In recent years, fuel cell vehicles (FCV (Fuel Cell Vehicles)) that do not emit carbon dioxide and other harmful substances have been actively developed, and organic solvents are used due to weight and safety issues when installing hydrogen cylinders. A way to do this is also being considered.

  However, the organic solvent containers and tanks used in many applications as described above need to be protected with a solvent resistant material. Patent Document 1 discloses a method for refurbishing an existing fuel tank in such a case.

JP 2002-211685 A

However, in the above-described conventional repair method, an inspection jig must be produced according to the tank, the apparatus becomes large and workability is poor.
Therefore, the present invention is not limited to a buried tank, but after performing FRP construction on a solvent tank such as a ground tank or a vertical tank, or without performing FRP construction, ceramic coating, glass coating, or Teflon lining, Or it proposes the anticorrosion structure of the solvent tank which performs phenol lining or plasma melt coating, etc., and protects the inside of the tank with a solvent resistant material.

  In order to solve the above problems, a first device is a solvent comprising: an existing steel tank; and a fiber reinforced composite material provided on the inner periphery of the steel tank to prevent solvent leakage from the steel tank. This can be achieved by providing an anticorrosion structure for the solvent tank in which the ceramic coating is applied to the inner peripheral surface of the fiber-reinforced composite material.

  Further, in order to solve the above-mentioned problem, in the second device, instead of the ceramic coating, glass coating, Teflon lining, phenol lining, or plasma melt coating is performed on the inner peripheral surface of the fiber reinforced composite material. Can be achieved.

  In order to solve the above problem, the third device is that the inner surface of the steel tank is directly coated with the ceramic coating, glass coating, Teflon lining, phenol lining, or plasma melt coating. Can also be achieved.

  According to the present invention, in a solvent tank storing an organic solvent such as ethyl acetate, toluene, xylene, etc., by coating or lining ceramic, glass, Teflon, phenol, plasma melting, etc. on the inner peripheral surface of the tank, Corrosion of the solvent tank can be prevented.

It is a figure which shows the example of the solvent tank of this embodiment. It is a figure which shows sectional drawing of the solvent tank of this embodiment. It is an external view of the low temperature ceramic coater used for ceramic coating. It is a figure explaining the structure of a low-temperature ceramic coater. It is a figure which shows the state which performs ceramic coating on the inner surface of a solvent tank using a low-temperature ceramic coater. It is a figure which shows the example of the vertically installed solvent tank placed on the ground. It is an external view of the apparatus explaining the corrosion prevention method of the solvent tank by 2nd Embodiment, (a) shows the front view, (b) shows a side view. It is a figure explaining the internal circuit of the automatic coating apparatus by 2nd Embodiment. It is a figure which shows a mode that an automatic application device drive | works the inside of a solvent tank in the arrow direction, and performs ceramic coating from the ceramic application part provided in the front-end | tip of a ceramic applicator. It is the figure which looked at a mode that the automatic coating device drive | works the inside of a solvent tank in the arrow direction, and performs ceramic coating from the ceramic application part provided in the front-end | tip of a ceramic applicator from the cross-sectional direction of the solvent tank.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating an example of a solvent tank according to the present embodiment. In the solvent tank 1, for example, an oil supply pipe 2 for injecting a solvent such as ethyl acetate, toluene, xylene or the like, an oil supply pipe 3 for sucking the solvent from the solvent tank 1, a vent pipe 4 for venting the solvent tank 1, and a solvent tank A liquid level gauge (not shown) for measuring the liquid level of the solvent stored in 1 is provided. The solvent tank 1 is buried at a predetermined depth from the ground surface, and concrete 5 is provided on the solvent tank 1.

  The oil supply pipe 2 is provided with an oil supply port 6 on the ground surface, and solvent is supplied from the oil supply port 6. The oil supply pipe 3 is provided with equipment 7 such as a meter and a pump on the ground surface, and sucks the solvent from the solvent tank 1 and measures the sucked solvent. The oil supply pipe 2 is provided with a valve (not shown), and the oil supply pipe 3 is also provided with a valve (not shown). When the solvent tank 1 is repaired / refurbished, both valves are closed. The vent pipe 4 is provided with a vent hole (not shown) to discharge gas generated in the solvent tank 1.

FIG. 2 is a view showing a cross-sectional configuration of the solvent tank 1, and is a view showing an AA ′ cross section of the solvent tank 1 shown in FIG. As shown in the figure, the solvent tank 1 is composed of a steel plate 13, and an FRP (fiber reinforced composite material) 14 is provided inside the steel plate 13. Further, a ceramic coating 15 is applied to the inner peripheral surface of the FRP 14. In addition, the concrete construction method of the ceramic coating 15 is mentioned later.
A solvent 16 such as ethyl acetate, toluene, or xylene is accommodated in the solvent tank 1 having the above-described cross-sectional configuration.

  The FRP 14 is formed, for example, by applying a novolac-based vinyl ester resin to a mat-like reinforcing agent and by a coating roll or the like to a predetermined thickness. As the reinforcing agent, for example, inorganic fibers such as glass fibers, carbon fibers, boron fibers and basalt fibers, and organic fibers such as nylon fibers, polyester fibers, aramid fibers and liquid crystal fibers are used. It is also possible to use a reinforcing agent in the form of a shape or a nonwoven fabric.

  Further, as a method for laminating the FRP 14, in addition to the above-described hand lay-up laminating method, for example, a spray-up laminating method in which a resin is applied to the reinforcing agent by spraying can be employed. By applying the FRP 14, the FRP 14 is formed on the entire inner peripheral surface of the solvent tank 1, and then the ceramic coating 15 is performed on the inner peripheral surface of the FRP 14.

   FIG. 3 is an external view of a low-temperature ceramic coater 21 used for the ceramic coating 15, and the inner peripheral surface of the solvent tank 1 (FRP 14) is coated with ceramic by an impact sintering method. The low-temperature ceramic coater 21 shown in the figure is composed of a main body 21a and a handle 21b. When performing ceramic coating on the inner peripheral surface of the solvent tank 1 (FRP 14), the low-temperature ceramic coater 21 is operated by holding the handle 21b.

  FIG. 4 is a diagram showing the structure of the low-temperature ceramic coater 21, which has a combustion chamber 22 in the low-temperature ceramic coater 21, introduces oxygen gas from the oxygen passage 22 a, and kerosene, acetylene, Alternatively, a combustion gas such as natural gas or a fuel liquid is introduced. Then, the fuel and oxygen are mixed by the burner 22c and guided to the combustion chamber 22. The frame 23 generated by the combustion chamber 22 passes through a gun nozzle 24 for reducing the area, and reaches a tip tube 25 attached to the tip of the gun nozzle 24. The gun nozzle 24 has a compressed air passage 26 therein, and the compressed air is controlled so that the compressed air flows in a layered manner on the inner surface of the tip tube 25 by the compressed air injection ring 27 and the powder does not adhere to the inner surface of the tip tube 25.

   A mixture of the slurry powder and acetylene, methane, ethane, butane, propane, or propylene gas is introduced into the tip tube 25 from the slurry powder and the combustion gas passage, cooled by the powder supply nozzle 28, and cooled to a low temperature. Powder is sprayed from the tip tube 25 at high speed, and the low-temperature molten ceramic particles 29 collide with the inner surface of the FRP 14 to form a sintered film.

  FIG. 5 is a diagram showing a state in which ceramic coating is performed on the inner surface of the solvent tank 1 (FRP 14) using the low temperature ceramic coater 21. As shown in the figure, the operator 20 holds the handle 21b and operates the low-temperature ceramic coater 21 to perform ceramic coating on the inner surface of the solvent tank 1 (FRP 14).

  By processing in this way, the solvent such as ethyl acetate, toluene, or xylene stored in the solvent tank 1 comes into contact with the ceramic coated on the inner peripheral surface of the FRP 14, and the solvent is not denatured. An effective anti-corrosion structure for the solvent tank 1 can be obtained without causing the ceramic tank 15 to corrode the solvent tank 1 (FRP 14).

  In the above description of the embodiment, the embedded solvent tank 1 has been described. However, the present invention can be similarly applied to a solvent tank installed on the ground.

  FIG. 6 is a diagram showing an example of a vertically installed solvent tank placed on the ground. Also in the case of the vertically installed solvent tank 17 of this example, an oil supply port 18 and a supply port 19 are provided, and a solvent such as ethyl acetate, toluene, or xylene is supplied from the oil supply port 18 to the solvent tank 17. Then, a solvent such as ethyl acetate, toluene, or xylene is lubricated to the outside from the pouring port 19. The solvent tank 17 is installed on the ground by a plurality of legs 17a and 17b.

  Although not shown in the figure, the vertically installed solvent tank 17 contains a solvent such as ethyl acetate, toluene, or xylene as described above, and its cross-sectional structure is the same as that of the solvent tank 1 described above. FRP (fiber reinforced composite material) is formed on the inner side, and further ceramic coating is performed on the inner side of the FRP. The ceramic coating method is the same as that for the solvent tank 1.

  By processing as described above, even in the solvent tank 17 installed on the ground, the stored solvent such as ethyl acetate, toluene, or xylene comes into contact with the coated ceramic, so that the solvent can be altered. Furthermore, corrosion is prevented by the ceramic.

  In the above description, the case where the ceramic coating is performed has been described. However, a glass coating may be performed instead of the ceramic coating. When glass coating is performed on the inner peripheral surface of the solvent tank 1, specifically, in order to coat the inner peripheral surface of the FRP 14, the coating is performed while protecting the FRP 14 using a low temperature glass coater.

  By processing in this way, the solvent such as ethyl acetate, toluene, or xylene stored in the solvent tank 1 comes into contact with the glass material coated on the inner periphery of the FRP 14, and the glass is not altered. The solvent tank can be protected by coating.

  Moreover, it is good also as a structure which replaces with ceramic coating and glass coating and performs Teflon lining. Specifically, Teflon (registered trademark) performs Teflon lining on the inner surface of the solvent tank 1 (FRP 14) using the following materials. For example, polytetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), tetrafluoroethylene / ethylene copolymer (ETFE) ), Polyvinylidene fluoride (PVDF), polychlorotrifluoroethylene (PCTFE), chlorotrifluoroethylene / ethylene copolymer (ECTFE), etc. I do.

Furthermore, it is good also as a structure which replaces with ceramic coating and glass coating and performs phenol lining. Phenol resins are particularly excellent in oil resistance, solvent resistance, and chemical resistance among synthetic resins, and are suitable for protecting solvent tanks.
Thus, in place of ceramic coating or glass coating, the tank can be protected from solvents such as ethyl acetate, toluene, or xylene stored in the solvent tank 1 by adopting a configuration in which Teflon lining or phenol lining is performed. Can do. Furthermore, it is possible to protect the tank from a solvent such as ethyl acetate, toluene, or xylene stored in the solvent tank 1 by adopting a configuration in which plasma melt coating is performed instead of ceramic coating or glass coating.

  FIG. 7: is an external view of the apparatus explaining the corrosion prevention method of the solvent tank by 2nd Embodiment, The figure (a) shows the front view, The figure (b) shows a side view. The anticorrosion method for the solvent tank according to the second embodiment automatically executes the ceramic coating and the glass coating according to the first embodiment with a coating apparatus.

  The automatic coating apparatus 30 of this example causes the above-described solvent tank 1 to self-run in the longitudinal direction, and performs ceramic coating or glass coating on the inner periphery of the solvent tank 1 that is the intersecting direction of the self-running direction. . This will be specifically described below.

The automatic coating apparatus 30 of this example is roughly divided into a lower apparatus 31 and an upper apparatus 32. The lower device 31 includes wheels 33 and is capable of traveling by transmitting power to the wheels 33. The upper device 32 is attached to a member 34 protruding from the lower device 31.
The upper device 32 includes a rotatable rotating part 36. The rotating portion 36 is for attaching a rod-like member 37 having a ceramic applicator 40 attached to the tip thereof and moving the ceramic applicator 40 along the inner periphery of the solvent tank 1. Further, an attachment portion 38 for attaching the rod-shaped member 37 to the upper device 32 is provided.

  The cross section of the rod-shaped member 37 has a shape in which a trapezoidal shape is connected to a round shape. With this structure, a portion where the round shape and the trapezoid shape are connected (a depressed portion) has a function of a guide, and the rod-shaped member 37 is attached to the attachment portion 38 so as to be movable along the longitudinal direction.

  On the surface 39 of the bar-shaped member 37 on the trapezoidal upper device 32 side, grooves (not shown) extending in the longitudinal direction of the bar-shaped member 37 are formed side by side. The upper device 32 is provided with a gear 35 having a shape corresponding to the groove, and the teeth of the gear 35 mesh with the groove on the surface 39 of the rod-shaped member 37 when the rod-shaped member 37 is mounted on the mounting portion 38. It has become. Thereby, in this example, the gear 35 is rotated to apply the ceramic to the inner surface of the solvent tank 1 of the ceramic applicator 40.

  The amount of movement in the circumferential direction of the ceramic applicator 40 due to the rotation of the rotating unit 36 of the upper device 32 varies depending on the length from the mounting portion 38 to the ceramic applicator 40. The size of the inner diameter of the solvent tank 1 is not constant, and the measurement interval for measuring on the inner surface may be different. For this reason, in this example, for example, the user designates the inner diameter of the solvent tank 1 and the measurement interval for measurement in the circumferential direction.

  FIG. 8 is a diagram illustrating an internal circuit of the automatic coating apparatus 30 according to the second embodiment. The automatic coating apparatus 30 of this example includes a CPU 50, a RAM 51, a ROM 52, a transmission / reception unit 53, a ceramic coating device 40, an operation unit 54, a display unit 55, a display control unit 56, three motors 57 to 59, and a motor drive unit 60. ing.

The CPU 50 controls the automatic coating apparatus 30 as a whole by reading the program stored in the ROM 52 into the RAM 51 and executing it. The display control unit 56 is for outputting an image to the display unit 55.
The three motors 57 to 59 are, for example, a motor 57 for self-running the lower device 31, a motor 58 for rotating the rotating unit 36, and a motor 59 for rotating the gear 35, respectively. For example, any of the motors 57 to 59 is individually driven and controlled.

The CPU 50 stores the content (setting data) set by the user via the operation unit 54 in the RAM 51. When the start of ceramic coating on the inner surface of the solvent tank 1 (FRP 14) is instructed by an operation to the operation unit 54, the setting data stored in the RAM 51 is referred to, and the motors 57 to 59 is driven. Thereby, ceramic coating is autonomously performed on the entire inner surface of the solvent tank 1 to be coated. During the ceramic coating, the coating result is stored in the RAM 51 and displayed on the display unit 55 in accordance with the operation of the operation unit 54.

  The rotation of the gear 35 by the motor 59 is performed in accordance with preset contents. Thereby, the gear 35 is rotated by a predetermined rotation amount so that the ceramic applicator 40 moves toward the inner surface of the solvent tank 1 (FRP 14), and the ceramic applicator 40 automatically detects the inner surface of the FRP 14, Perform ceramic coating.

  FIG. 9 is a diagram showing a state in which the automatic coating apparatus 30 travels in the solvent tank 1 in the direction of the arrow and performs ceramic coating from the ceramic coating unit 41 provided at the tip of the ceramic coating device 40. FIG. 10 is a view of this state as viewed from the cross-sectional direction of the solvent tank 1.

  In this example, instead of the first embodiment in which the operator 20 performs ceramic coating on the solvent tank 1 manually by the operator 20 in this example, the solvent tank 1 is efficiently handled by the automatic coating apparatus 30 in this example. A ceramic coating can be applied. As in the case of manual operation, the solvent such as ethyl acetate, toluene, or xylene stored in the solvent tank 1 comes into contact with the ceramic coated on the inner periphery of the FRP 14 without altering the solvent. Furthermore, the solvent tank 1 (FRP 14) is not corroded by the ceramic coating 15, and an effective anticorrosion structure for the solvent tank 1 can be obtained.

In this example, instead of ceramic coating, glass coating, plasma melt coating, Teflon lining, or phenol lining may be automatically performed.
In the present embodiment, the automatic application device 30 is moved in the radial direction of the solvent tank 1, but the method for realizing the movement of the automatic application device 30 in the circumferential direction and the circumference of the automatic application device 30 are also described. The method for realizing the movement in the crossing direction of the directions is not limited to the movement method of this example, and various modifications are possible.

DESCRIPTION OF SYMBOLS 1 ... Solvent tank 2 ... Lubrication pipe 3 ... Lubrication pipe 4 ... Ventilation pipe 5 ... Concrete 6 ... Lubrication port 7 ... Lubrication port 13 ... Steel plate 14 ... FRP ( Fiber reinforced composite)
15. Solvent 17 ... Solvent tanks 17a, 17b ... Leg 18 ... Filling port 19 ... Lubrication port 20 ... Worker 21 ... Low temperature ceramic sheath 22 ... Combustion chamber 22a ... Oxygen passage 22b ... Fuel passage 22c, burner 23, frame 24, gun nozzle 25, tip tube 26, compressed air passage 27, compressed air injection ring 28, powder supply nozzle 29, low temperature molten ceramic particles 30, automatic coating Device 31 ·· Lower device 32 · · Upper device 33 · · Wheel 34 · · Member 35 · · Gear 36 · · Rotating portion 37 · · Bar-shaped member 38 · · Mounting portion 39 · · Surface 40 · · Ceramic applicator 41 ·・ Ceramic coating part 50 ・ ・ CPU
51..RAM
52 · · ROM
53..Transmission / reception unit 54..Operation unit 55..Display unit 56..Display control units 57 to 59..Motor 60..Motor drive unit.

Claims (7)

Existing steel tanks,
In a solvent tank provided with an inner periphery of the steel tank and a fiber-reinforced composite material that prevents solvent leakage from the steel tank,
An anticorrosion structure for a solvent tank, wherein ceramic coating is applied to the inner peripheral surface of the fiber reinforced composite material. Existing steel tanks,
In a solvent tank provided with an inner periphery of the steel tank and a fiber-reinforced composite material that prevents solvent leakage from the steel tank,
An anticorrosion structure for a solvent tank, wherein glass coating is performed on the inner peripheral surface of the fiber reinforced composite material. Existing steel tanks,
In a solvent tank provided with an inner periphery of the steel tank and a fiber-reinforced composite material that prevents solvent leakage from the steel tank,
An anticorrosion structure for a solvent tank, characterized in that Teflon lining is applied to the inner peripheral surface of the fiber reinforced composite material. Existing steel tanks,
In a solvent tank provided with an inner periphery of the steel tank and a fiber-reinforced composite material that prevents solvent leakage from the steel tank,
An anticorrosion structure for a solvent tank, wherein an inner peripheral surface of the fiber reinforced composite material is phenol-lined.   The ceramic coating, the glass coating, the plasma melt coating, the Teflon lining, or the phenol lining is directly applied to the inner peripheral surface of the steel tank. The anti-corrosion structure of the solvent tank described in 1.   The said tank made from steel is provided above the ground or underground, The anticorrosion structure of the solvent tank of Claim 1, 2, 3, 4, or 5 characterized by the above-mentioned.   The said solvent is ethyl acetate, toluene, xylene, or alcohol, The anticorrosion structure of the solvent tank of Claim 1, 2, 3, 4, 5, or 6 characterized by the above-mentioned.

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