JP2643077B2 - Local repair method and repair device for glass lining equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the use of an inorganic material in a locally damaged portion of a lining glass layer covering inner walls of reactors, storage tanks and piping parts used in the industrial fields such as the chemical industry and the food industry. The present invention relates to a method for repairing a locally damaged portion of a lining glass layer and a device therefor, wherein the protective film is formed.

[0002]

2. Description of the Related Art Conventionally, as a local repair method of a glass lining device by a sol-gel method, for example,
Using a sol-gel aqueous solution repair agent mixed with an inorganic filler, a local repair method of the lining glass layer to form a repair layer having a thickness almost the same as a normal lining glass layer, or an inorganic metal powder and an organic metal compound such as a metal alkoxide. A method in which a mixture is applied to a damaged portion and then solidified by reaction at a temperature lower than the transition point of the lining glass to form a glass repair layer (Japanese Patent Application Laid-Open No. 2-258985);
In 68064, a sol solution (repairing agent) composed of a metal alkoxide compound prepared by optionally mixing an inorganic filler is applied to the damaged portion of the lining glass layer, and after the repairing agent application portion is irradiated with ultraviolet rays, A repair method has been proposed in which the coated portion is sintered at a temperature of 350 ° C. or less by a heater having a nichrome linear heating element to form a repair glass layer.

Further, in order to perform local heating treatment of a repair agent in a narrow space inside a glass lining device, conventionally, a commercially available mantle heater, panel heater or the like is usually used. The above-mentioned JP-A-Hei 2-
In connection with the repairing method of Japanese Patent No. 258985, a repairing device (Japanese Patent Laid-Open No. 3-2386) has been proposed which makes it possible to suitably solidify a repairing agent by utilizing heat radiation from a far-infrared heating element.
At the same time, the applicant has disclosed in the same application a repairing device equipped with an ultraviolet lamp, which is applicable to the repairing method of Japanese Patent Application No. 5-68064.

[0004]

However, according to the former repair method, the reactivity of the sol-gel glass repair agent is low, so it takes a long time to perform the repair, and if heating is started before the reaction is completed. There is a possibility that the strength and corrosion resistance of the prepared repair glass layer are reduced, for example, evaporation of the repair agent becomes severe, cracks occur in the repair glass layer, and the like. In addition, the latter repair method, that is, a solution of a sol composed of a metal alkoxide compound in which a photocatalyst and an inorganic filler are arbitrarily mixed is applied, and the surface of the repair glass layer completed through ultraviolet irradiation and subsequent heating operation by a heater is applied. Since the surface of the lining glass layer around the repaired part is rough (Rmax> 1 micron), it has poor chemical resistance and poor decorativeness. Practical problems have been pointed out, such as the occurrence of many cracks on the surface due to the stress of typical polishing.

Further, in any of the above methods, in order to obtain a repaired glass layer having a desired thickness, it is necessary to repeat the work of applying and heating a glass material.
It has the disadvantage that the construction time required to build the repair glass layer is long, even if the above-mentioned repair equipment is used, application of the repair agent, installation and operation of the equipment at the repair location, etc. Various operations have to be repeated, which burdens the user.

Further, in order to improve the reactivity of the sol-gel glass repair agent, the heating temperature of the repair agent application site is set to 350 ° C.
In this case, since the normal lining glass layer around the damaged portion is damaged, there is a limit in increasing the reactivity of the repairing agent by increasing the temperature (see JP-A-2-240282). When the temperature is below ℃, the composition of the repair glass becomes inhomogeneous due to the evaporation and bumping phenomenon of the liquid repair agent, the UV irradiation effect is reduced, and cracks occur due to the gel-like repair agent and the drying shrinkage of the repair glass. ,
There is also a problem that the performance of the repair glass layer is reduced.

[0007] That is, it is a main problem that needs to be solved in the technical field to apply a sound repair glass layer to a portion to be repaired promptly.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a method and apparatus for repairing a local part of a glass lining device invented in view of the above-mentioned problems. (B) applying a first sol-gel aqueous solution repair agent containing an inorganic fine powder and a photoexcited catalyst compound to the damaged portion, and (c) irradiating the damaged portion with ultraviolet light to repair the applied sol-gel aqueous solution. The agent is reacted and solidified, and (d) a sheet material having a repair liquid injection hole and a repair liquid discharge hole is applied to the periphery of the repair portion with a support frame so as to cover the damaged portion irradiated with the ultraviolet rays, and the fixing means is fixed. (E) injecting a second sol-gel aqueous solution repair agent containing a photoexcited catalyst compound into the sealed space from the injection hole of the sheet material. And the second sol-gel aqueous solution The agent flows down from the repair liquid discharge hole of the sheet material, and (f) irradiates ultraviolet rays to the damaged portion where the second sol-gel aqueous solution repair agent has flowed down and is in contact, and the second sol-gel aqueous solution repair agent solidifies by reaction, And (g) forming the second repair layer by heating the damaged portion irradiated with the ultraviolet rays at a temperature that does not damage the lining glass layer around the damaged portion due to a difference in thermal expansion from the base metal. A local repair method for a glass lining device; a sheet material for covering a damaged portion having a repair liquid injection hole and a repair liquid discharge hole; a support frame for applying the sheet material to a periphery of the repair portion; An apparatus for repairing a broken portion of a lining glass layer of a glass lining device including fixing means for fixing a frame to a broken portion; the sheet material further includes a window frame member fitted with an ultraviolet transmitting material, and an ultraviolet lamp ,
A repair device further including a support for holding the ultraviolet lamp, a repair device main body including an umbrella holding the support device, and magnet means for fixing the repair device main body to a lining glass surface of a glass lining device; A recovery bin connected to the repair liquid discharge hole, a repair liquid supply path for supplying a repair liquid from the recovery bin to the repair liquid injection hole, and a repair liquid supply path for supplying the repair liquid from the recovery bin Is a repairing device further including a pump for leading to the air conditioner.

The first aqueous sol-gel repair agent is prepared by mixing a photoexcited catalyst compound with a solution prepared by mixing inorganic fine powder, metal alkoxide, metal salts, alcohol and water.

[0010] Examples of the inorganic fine powder that can be blended with the first repair agent of the present invention include alumina particles and silica particles.

Similarly, the photoexcitable catalyst compound which can be blended with the first repairing agent of the present invention does not basically deteriorate the performance of the repairing agent. Any compound that promotes the reaction and the vitrification reaction may be used, and specific examples include the following compounds.
That is, (1) saturated or conjugated unsaturated carbonyl compounds such as acetaldehyde, acetophenone, cobalt carbonyl, benzophenone, coumarin, 4-methyl-4-phenyl-2-cyclohexenone, p-benzoquinone; (2) acetylene, cycloheptene, 2 Alkenes and alkyne compounds having double or triple bonds such as 1,3-dimethyl-2-butene, 1,3-pentadiene, stilbene, diphenylacetylene; (3) aromatics such as 1,3,5-trimethylbenzene, naphthalene Hydrocarbon compounds; (4) acetic anhydride, phenylacetic acid, benzoic acid, erythro-2-
Carboxylic acids such as phenylacetate and derivatives thereof; (5) halogen compounds such as chloroform, tetrabromoethane, 1-iodonorbornane, α, α, α-trichlorotoluene; (6) 1,2,4,5-tetracyano Carbonitrile compounds such as benzene and 9,10-dicyanoanthracene; (7) Inorganic acid esters such as sodium ethoxide, hypochlorite and nitrite; (8) Alcohols such as methanol; (9) Diethyl ether (10) Peroxides such as hydrogen peroxide and hydroperoxide; (11) 2-amino-5-azotoluene, N-methylformamide, phenylimine, α, α-azoisobutyronitrile , Nitrobenzene, diazirine, nitrene and other nitrogen-containing compounds; (12) methanethiol, thiobenzophenone, phosphine, sulfone Sulfur, phosphorus such as sulfide, acylsilane, silylene, germylene, phosphinediyl, boranediyl,
(13) heterocyclic aromatic compounds such as pyridine and benzothiophene; (14) organometallic complexes such as tris [2,2'-bipyridine] ruthenium and methylcobaloxime; and (15) A) a mixture comprising a combination of compounds arbitrarily selected from the above compounds (1) to (14).

The sheet material for covering the damaged portion used in the repair device of the present invention is a material which does not exhibit a chemical reaction due to contact with the repair liquid to be used and which is easily processed, for example, a material made of plastic. Any material can be used as long as it has a hole capable of injecting / discharging the repair liquid.

[0013] The supporting frame for the sheet material is preferably one having a cross section of "R" shape, "D" shape, etc., to which the sheet material can be applied so as to surround the repaired portion. For example, aluminum or the like that does not easily deform and does not cause corrosion or chemical reaction due to contact with the repair liquid can be used.

Further, as a fixing means for fixing the support frame to the damaged portion, magnetic means, considering the ease of attachment and detachment and the presence of the base metal of the lining glass equipment,
Particularly, a rare earth magnet having a large magnetic force is preferable.

Further, the ultraviolet lamp is applied for the purpose of causing a sol-gel reaction of a repair agent by light energy while avoiding transmission of thermal energy generated from the ultraviolet lamp to a damaged portion. In addition, as the ultraviolet lamp of the repairing apparatus of the present invention, it is preferable to use an ultraviolet lamp that generates ultraviolet light having a center wavelength of 250 nm and / or 365 nm from the viewpoint of increasing the temperature of the damaged portion and accelerating the vitrification reaction.

The window frame member mounted on the sheet material is, for example, from the viewpoint of maintaining affinity with the sheet material constituting material, easiness of processing, and hermeticity of the space formed by the sheet material. Rubber or soft plastics can be used, and as the ultraviolet-permeable substance fitted to the window frame member, any substance that does not cause modification by irradiation with ultraviolet rays can be used, and for example, quartz glass or the like can be used. .

[0017]

The repair method of the present invention includes a step of slowly flowing down the liquid repair agent, that is, the viscosity of the repair agent is increased only when the repair layer is formed by irradiation of harmless photocatalyst and ultraviolet rays, and the evaporation rate is suppressed. Therefore, by forming a closed space by the sheet material, a smooth surface property of the repair layer with few cracks can be obtained.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

Example 1 First, an open-type tank according to JISR4201 (made of SS400, capacity 100
After a glass lining layer 2 having a thickness of 1 mm was applied to the inner wall (base metal) 1 of l), a broken portion 3 of the lining glass layer having a diameter of about 40 mm was formed at the center of its body (the state shown in FIG. 1 (a)). ).

An aqueous sol-gel solution having the composition shown in Table 1 below was prepared by stirring and mixing at 80 ° C. for 1 hour.
20 g of commercially available alumina titania particles were mixed with this aqueous solution to obtain a first repair agent.

[0021]

[Table 1]

The first repair agent was applied to the damaged portion 3 until the thickness became almost the same as the thickness of the surrounding lining glass layer 2. Then, the applied first repair agent was reacted and solidified using an ultraviolet lamp having a central wavelength of 365 nm, thereby forming a first repair layer (composite sol-gel glass) 4 (FIG. 1).
(b)).

An aqueous sol-gel solution having the composition shown in Table 1 was used as a second repair agent (impregnation liquid).

The sheet material 11 provided with the injection hole 12 and the discharge hole 13 for the impregnation liquid 17 was temporarily fixed around the damaged portion 3 with a commercially available adhesive tape. In addition, a Teflon valve 14 for adjusting the flow rate of the impregnating liquid 17 and a polyethylene tube 15 were connected to the discharge hole 13 so that the tube 15 reached the inside of the polyethylene collection bin 16. Then, a support frame 18 made of a lightweight aluminum plate (thickness 0.5 mm) is applied to the sheet material 11, and the samarium-cobalt-based rare earth magnet (fixing means) 19 passes through the support frame 18 so that the sheet material 11 is damaged. After adhering closely to the surrounding lining glass layer 2 and sealing the space created between the lining glass layer 2 and the sheet material 11, the adhesive tape was removed. Finally, the collection bin 16 and the samarium-cobalt-based rare earth magnet 19 were tied with a string, and the collection bin 16 was fixed to the lining glass layer 2 to complete the setting of the entire repair apparatus [state in FIG. 2].

Then, the second repair agent 17 is poured from the injection hole 12 into the space formed between the lining glass layer 2 and the sheet material 11 so as to impregnate the porous portion of the first repair layer 4. It is.

The capacity of the space and the collecting bin 16 was calculated by preliminary experiments based on the area of the damaged portion 3 and the like. In the case of the present embodiment, the capacity was about 500 ml.

After the impregnation for 20 minutes, the valve 14 is adjusted so that the impregnating agent moves to the collection bin 16 at a gentle flow rate of about 10 ml / min. After leaving at room temperature for 30 minutes, the repair equipment was removed. Next, the first repair agent is applied to the damaged portion 3 until the thickness becomes substantially the same as the thickness of the surrounding lining glass layer 2, and the applied first repair agent is reacted and solidified using an ultraviolet lamp having a central wavelength of 365 nm. As a result, a composite sol-gel glass (second repair layer) 5 was formed.

The above-described process using the repair apparatus of the present invention and the ultraviolet irradiation process were repeated 5 to 10 times.

The repaired sample obtained through the above series of steps was designated as "Sample A". On the other hand, as a comparison, a repair sample obtained by applying the second repair agent 17 the same number of times as that of the A sample without using the above repair device was designated as "B sample".

Example 2 The same open-type tank (made of SS400, capacity 100 l) as in Example 1,
A first repair agent and a second repair agent (impregnation liquid) were used.

First, an opening is provided in the center of the sheet material 11, and a frame member 22 made of silicon rubber in which a quartz glass plate (thickness: 1 mm) 21 is fitted is stopped with an epoxy resin type adhesive so that no liquid leakage occurs. I did it.

The sheet material 11 having the injection hole 12 and the discharge hole 13 for the impregnation liquid 17 was temporarily fixed around the damaged portion 3 with a commercially available adhesive tape. Then, a lightweight aluminum plate (thickness 0.5mm)
Apply the support frame 18 prepared in
The sheet material 11 is brought into close contact with the lining glass layer 2 around the damaged portion 3 by a neodymium-based rare earth magnet (fixing means) 19 via 18, and the space created between the lining glass layer 2 and the sheet material 11 is sealed. Thereafter, the adhesive tape was removed.

Light-reflective lightweight aluminum plate (0.5 m thick)
A cold cathode low-pressure mercury lamp 24 (24 W, manufactured by Irie Seisakusho) having a center wavelength of 250 nm was mounted on the lamp house 23 prepared in m), and the lamp 24 was screwed to the house 23 and supported. The lamp 24 is electrically connected to a power supply via a lead wire 26 through a cold cathode type low-pressure mercury lamp ballast 27.

Then, the collection bin 16 and the samarium-cobalt-based rare earth magnet 19 are connected by a string, and the collection bin 16 is connected to the house 23.
Finally, the house 23 is fixed to the lining glass layer 2 around the damaged portion 3 by a neodymium rare earth magnet (fixing means).
25, and the setting of the entire repair apparatus was completed (the state of FIG. 3).

Then, the second repair agent 17 is poured into the space formed between the lining glass layer 2 and the sheet material 11 from the injection hole 12 so as to impregnate the porous portion of the first repair layer 4. It is.

The capacity of the space and the collecting bin 16 was calculated by preliminary experiments based on the area of the damaged portion 3 and the like. In the case of the present embodiment, the capacity was about 600 ml.

After the impregnation for 20 minutes, the valve 14 is adjusted so that the impregnating agent moves to the collecting bin 16 at a gentle flow rate of about 10 ml / min, and the ultraviolet lamp 24 is turned on simultaneously with the start of the flow to perform the second repair. After the entire amount of the agent was allowed to flow, irradiation with ultraviolet rays was continued for another 20 minutes with the repair device installed.

The step of forming the second repair layer using the repair apparatus of the present invention was repeated 5 to 10 times.

The repair sample obtained in this example was designated as "C sample".

Embodiment 3 The following structure was further added to the repair device disclosed in Embodiment 2. That is, an ultra-small tube pump (manufactured by Tokyo Rikaki Kaisha Co., Ltd.) 31 fixed to a lightweight aluminum support base with a string or the like is attached to the lower part of the polypropylene collection bin 16, and the second repair agent 17 Then, a structure (state shown in FIG. 4) in which the solution was returned to the repairing agent injection hole 12 through a silicon tube (outer diameter 3 × inner diameter 1 mm) 32 functioning as a return path was added.

The valve 14 was adjusted so that the second repair agent 17 flows down to the recovery bin 16 at a gentle flow rate of about 10 ml / min using the repair apparatus of this embodiment further having the above-described structure. Then, the UV lamp 24
For 20 minutes.

Next, using a timer or the like, when the lamp 24 is turned on, a second flow of the second repair agent 17 is automatically started, and a series of processes for forming the second repair layer are performed. The operation was automatically repeated 5-10 times.

The repair sample obtained in this example was designated as "D sample".

With respect to each of the repaired samples obtained in Examples 1 to 3, the surface gloss and the acid resistance were measured according to JISZ8741.
The test was carried out according to (60 ° specular gloss) and JSR4201 (contact of each sample with the boiling steam of a 20% HCl aqueous solution for the repair site: 48 hours). The results are shown in Table 2 below.

[0045]

[Table 2]

As is clear from Table 2 above, the repair sample obtained by using the method / apparatus of the present invention is superior in any performance as compared with the repair sample according to the prior art (B sample). It was confirmed that.

[0047]

According to the present invention employing a repair method including a step of slowly flowing down a liquid repair agent and an apparatus therefor, the surface property of the repair layer is excellent in corrosion resistance (acid corrosion resistance) and has few cracks. It is formed.

Further, according to the repair method of the present invention, various excellent effects are exhibited, such as a repair glass layer having the above characteristics can be formed quickly.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views showing a repaired state according to the present invention.

FIGS. 2A and 2B are a front view and a top view, respectively, of an embodiment of the repair device of the present invention.

FIGS. 3A and 3B are a front view and a top view, respectively, of another embodiment of the repair device of the present invention.

FIGS. 4 (a) and (b) are a front view and a top view, respectively, of another embodiment of the repair device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base metal 2 ... Lining glass layer 3 ... Damaged part 4 ... First repair layer 5 ... Second repair layer 11 ... Sheet material 12 ... Injection hole 13 ... Discharge hole 14 ... Valve 15 ... Tube 16 ... Recovery bin 17 ... Impregnation Liquid 18 Support frame 19 Fixing means 21 Quartz glass 22 Frame member 23 Lamp house 24 Lamp 25 Fixing means 26 Lead wire 27 Ballast 31 Pump 32 Tube

Claims (5)

(57) [Claims] 1. A local repair method for a glass lining device, comprising the following steps: (a) applying a first repair agent containing an inorganic fine powder and a photoexcited catalyst compound to a damaged portion formed in a lining glass layer; And
(b) irradiating ultraviolet rays to the damaged part to which the first repair agent has been applied, reacting and solidifying the applied first repair agent to form a first repair layer, and (c) forming the first repair layer. To cover, a sheet material having a repair liquid injection hole and a repair liquid discharge hole is fixed by fixing means, and a space is formed between the first repair layer and the sheet material, and (d) the space is formed. A second repair agent containing a photoexcited catalyst compound is injected from the injection hole, and is caused to flow down from the discharge hole, to bring the second repair agent into contact with a damaged portion, and (e) breakage caused by contacting the second repair agent. Irradiating the portion with ultraviolet light to react and solidify the second repair agent; and (f) damaging the irradiated portion with the ultraviolet light, causing damage to the lining glass layer around the damaged portion due to a difference in thermal expansion from the base metal. A method for local repair of glass lining equipment including a step of forming a second repair layer by heating at a temperature that is not high. 2. A sheet material having a repair liquid injecting hole and a repair liquid discharging hole, a support frame for applying the sheet material to a periphery of the repair portion, and fixing means for fixing the support frame to a damaged portion. For repairing damaged parts generated in the lining glass layer containing. 3. The sheet material further comprises a window frame member fitted with an ultraviolet-permeable substance, and an ultraviolet lamp,
The repair device according to claim 2, further comprising an ultraviolet irradiation device including a support for holding the ultraviolet lamp, an umbrella holding the support, and fixing means for fixing the umbrella. 4. A recovery bin connected to the repair liquid discharge hole, a repair liquid supply path for supplying a repair liquid from the recovery bin to the repair liquid injection hole, and a repair liquid from the recovery bin. The repair apparatus according to claim 2 or 3, further comprising a pump for guiding the repair liquid to the repair liquid supply path. 5. The repair device according to claim 2, wherein the fixing unit is a magnet unit.