WO2021261477A1 - Method for regenerating catslyst, apparatus for regenerating catslyst and program - Google Patents

Abstract

This method for regenerating a catalyst comprises: a step wherein a catalyst is washed with water; a step wherein the water-washed catalyst is wetted with a first chemical agent that has been repeatedly used; a step wherein the catalyst, which has been wetted with the first chemical agent, is wetted with a second chemical agent; and a step wherein the catalyst is washed with a finish cleaning liquid that is water or sulfamic acid-containing water. With respect to this method for regenerating a catalyst, the first chemical agent and the second chemical agent contain at least an inorganic acid and a fluorine compound; and the inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid.

Description

Catalyst regeneration methods, catalyst regeneration equipment and programs

The present disclosure relates to catalyst regeneration methods, catalyst regeneration devices and programs.
The present application claims priority with respect to Japanese Patent Application No. 2020-108620 filed in Japan on June 24, 2020, the contents of which are incorporated herein by reference.

In Patent Document 1, a denitration catalyst washed with water is immersed in a chemical solution containing an inorganic acid and a fluorine compound, and water or sulfamic acid-containing water is washed as a finishing cleaning solution to efficiently remove deposits on the surface of the denitration catalyst. Disclosed is a technique that can be removed and the catalytic performance can be restored to a high level.

Patent Document 2 describes that a denitration catalyst whose activity has been reduced by a silica-alumina-calcium sulfate-based toxic substance is washed with water in advance, and then the toxic substance is washed and removed using a mixed solution of an organic acid and a fluoride. Discloses a technique for improving catalytic activity.

Japanese Patent No. 6298579 Japanese Patent No. 4870217

A technique is known in which a catalyst is immersed in a washing tank containing a chemical solution to wet the surface of the catalyst with the chemical solution to remove deposits on the surface of the catalyst. However, when the catalyst is immersed in the used chemical solution repeatedly, the amount of deposits that can be removed is smaller than that in the case where the catalyst is immersed in the unused chemical solution. Therefore, it is necessary to replace the chemical solution after every few uses, and a large amount of chemical solution is used to remove the deposits.
An object of the present disclosure is to provide a catalyst regeneration method, a catalyst regeneration device, and a program that solve the above-mentioned problems.

The method for regenerating the catalyst according to the present disclosure is to wash the catalyst with water, to wet the washed catalyst with the first chemical solution that has been repeatedly used, and to wet the catalyst wet with the first chemical solution with the second chemical solution. , The catalyst is washed with water or a finish cleaning solution which is sulfamic acid-containing water, the first chemical solution and the second chemical solution contain at least an inorganic acid and a fluorine compound, and the inorganic acids are hydrochloric acid, hydrochloric acid and boro. Contains acid, or sulfamic acid.

The catalyst regeneration device according to the present disclosure includes a support device for moving the catalyst in the vertical and horizontal directions while supporting the catalyst, and a control device for controlling the support device, and the control device repeatedly lowers the catalyst downward. Controlled to be immersed in the used first chemical solution, controlled to be immersed in the second chemical solution by lowering the catalyst, controlled to be immersed in the finish cleaning solution by lowering the catalyst downward, and controlled to be immersed in the finish cleaning solution. The second chemical solution contains at least an inorganic acid and a fluorine compound, the inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid, and the finish cleaning solution is water or sulfamic acid-containing water.

In the program according to the present disclosure, the control device of the support device that moves the catalyst in the vertical and horizontal directions while supporting the catalyst is used to lower the catalyst downward and repeatedly immerse the catalyst in the used first chemical solution, and to lower the catalyst. It is a program to execute the lowering and immersing in the second chemical solution and the lowering and immersing the catalyst in the finishing cleaning solution. The first and second chemical solutions contain at least an inorganic acid and a fluorine compound. The inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid, and the finish cleaning solution is water or sulfamic acid-containing water.

According to at least one of the above embodiments, the catalyst can be used while being replaced a smaller number of times, as compared with the case where the catalyst is wetted with a predetermined chemical solution once to remove the deposits, and a smaller amount of the chemical solution can be used. Can be used to remove deposits.

It is a figure which shows an example of the catalyst which concerns on one Embodiment. It is a figure which shows the structure of the catalyst regeneration apparatus which concerns on one Embodiment. It is a schematic block diagram which shows the control device which concerns on one Embodiment. It is a flowchart which shows an example of the use mode of the catalyst regeneration apparatus which concerns on one Embodiment. It is a figure which shows the structure of the catalyst regeneration apparatus which concerns on one Embodiment. It is a flowchart which shows an example of the use mode of the catalyst regeneration apparatus which concerns on one Embodiment. It is a schematic block diagram which shows the structure of the computer which concerns on at least one Embodiment.

[First Embodiment]
(Composition of catalyst regeneration device)
Hereinafter, the catalyst regeneration device 100 according to the embodiment will be described in detail with reference to the drawings.
The catalyst 10 is used to remove _{nitrogen oxides (NO X} ) from the exhaust gas generated during the combustion of the power generation fuel. However, when the catalyst 10 is used, deposits such as ash adhere to the exhaust gas, and the activity of removing nitrogen oxides decreases.
The catalyst regeneration device 100 removes deposits on the surface of the catalyst 10 to prevent the activity of the catalyst 10 from being significantly reduced.

FIG. 1 is a diagram showing an example of the catalyst 10 according to the first embodiment.
The catalyst 10 is a denitration catalyst that removes nitrogen oxides from exhaust gas generated by combustion of fuel. Examples of the above fuel include fuel used in a boiler for power generation such as a coal-fired power plant.

The catalyst 10 has a honeycomb structure in which a plurality of cells 11 formed in a hollow polygonal prism are spatially filled. The catalyst 10 may be plate-shaped. In the example of FIG. 1, the catalyst 10 has 64 cells 11, but the catalyst 10 may be composed of different numbers of cells 11.
Although the cross section of the cell 11 shown in FIG. 1 is a quadrangle, the cross section of the cell 11 may have a different shape such as a triangle, a pentagon, a rectangle, and a hexagon.

FIG. 2 is a schematic view showing an example of the configuration of the catalyst regeneration device 100 according to the first embodiment.
The catalyst regeneration device 100 includes a first washing tank 21, a second washing tank 22, a third washing tank 23, a fourth washing tank 24, a support device 40, a control device 50, and a drainage table 60. , The hot air blower 70 is provided.

The first washing tank 21 stores the first chemical solution 31 for removing the ash adhering to the cell 11 of the catalyst 10. Examples of the first cleaning tank 21 include containers made of acrylic or SUS (Steel Special Use Stainless), and lining-treated ones are also included. The first chemical solution 31 is a fluorine-based cleaning agent containing at least an inorganic acid and a fluorine compound. Examples of inorganic acids include hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid. A surfactant may be contained here. The surfactant is more preferably a nonionic surfactant or an anionic surfactant. With this surfactant, calcium dissolved in the cleaning liquid and calcium in the dust can be highly dispersed, and there is an effect of suppressing reattachment to the catalyst. The first chemical solution 31, which is approximately three times the volume of the catalyst 10, is stored in the first washing tank 21.
The first cleaning tank 21 is set directly below the rail 41 on which the support device 40 travels.
The first chemical solution 31 is a chemical solution that has been used repeatedly. That is, the first chemical solution 31 is a chemical solution in which the catalyst 10 has been immersed. For example, the first chemical solution 31 is a chemical solution in which the catalyst 10 has been immersed three times.

The second washing tank 22 stores the second chemical solution 32 for removing the ash adhering to the cell 11 of the catalyst 10. Examples of the second washing tank 22 include containers made of acrylic, SUS, etc., and lining-treated ones are also included. The second chemical solution 32 is a fluorine-based cleaning agent containing an inorganic acid and a fluorine compound. Examples of inorganic acids include hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid. A surfactant may be contained here. The surfactant is more preferably a nonionic surfactant or an anionic surfactant. With this surfactant, calcium dissolved in the cleaning liquid and calcium in the dust can be highly dispersed, and there is an effect of suppressing reattachment to the catalyst. The second chemical solution 32, which is approximately three times the volume of the catalyst 10, is stored in the second washing tank 22.
The second cleaning tank 22 is set directly below the rail 41 on which the support device 40 travels.
The number of times the second chemical solution 32 is repeatedly used is less than the number of times the first chemical solution 31 is repeatedly used. For example, the second chemical solution 32 is an unused chemical solution.

The third cleaning tank 23 stores the first finishing cleaning liquid 33. Examples of the third washing tank 23 include containers made of acrylic, SUS, etc., and those treated with lining are also included. The first finishing cleaning liquid 33 is water or sulfamic acid-containing water. The first finishing cleaning liquid 33, which is approximately three times the volume of the catalyst 10, is stored in the third cleaning tank 23.
The third cleaning tank 23 is set directly below the rail 41 on which the support device 40 travels.
The first finish cleaning liquid 33 is a finish cleaning liquid that has been used repeatedly. That is, the first finishing cleaning liquid 33 is a chemical liquid in which the catalyst 10 has been immersed. For example, the first finishing cleaning liquid 33 is a chemical liquid in which the catalyst 10 has been immersed three times.

The fourth cleaning tank 24 stores the second finishing cleaning liquid 34. Examples of the fourth washing tank 24 include containers made of acrylic, SUS, etc., and lining-treated ones are also included. The second finishing cleaning liquid 34 is water or sulfamic acid-containing water. The second finishing cleaning liquid 34, which is approximately three times the volume of the catalyst 10, is stored in the fourth cleaning tank 24.
The fourth cleaning tank 24 is set directly below the rail 41 on which the support device 40 travels.
The number of times the second finish cleaning liquid 34 is repeatedly used is less than the number of times the first finish cleaning liquid 33 is repeatedly used. For example, the second finishing cleaning solution 34 is an unused chemical solution.

The support device 40 is a device that moves the catalyst 10 in the vertical direction and the horizontal direction while supporting the catalyst 10. Examples of the support device 40 include a hoist that is attached to a rail 41 installed on the ceiling of the facility and is capable of winding and unwinding a wire rope and moving along the rail 41.
The support device 40 supports the open surface of the catalyst 10 and the liquid level of the first chemical solution 31 so as to face each other, and supports the open surface of the catalyst 10 and the liquid level of the second chemical solution 32 so as to face each other. Further, the support device 40 supports the opening surface of the catalyst 10 and the liquid level of the first finishing cleaning liquid 33 so as to face each other, and the opening surface of the catalyst 10 and the liquid level of the second finishing cleaning liquid 34 face each other. To support.

The liquid draining table 60 is a table on which the catalyst 10 is placed in order to remove the second finishing cleaning liquid 34 adhering to the catalyst 10. In addition to the above, the drainage table 60 may be used for removing the water adhering to the catalyst 10, the first chemical solution 31, the second chemical solution 32, and the first finishing cleaning liquid 33.
The liquid drain stand 60 is set, for example, directly below the rail 41 on which the support device 40 travels.

The hot air blower 70 generates hot air to dry the catalyst 10. For example, the hot air blower 70 generates hot air toward the catalyst 10 existing in the liquid drain table 60 to dry the catalyst 10.
The hot air blower 70 is set, for example, directly under the rail 41 on which the support device 40 travels.

The control device 50 receives an input from the user of the catalyst regeneration device 100, immerses the catalyst 10 in the first chemical solution 31, the second chemical solution 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34, and immerses the catalyst 10 in the catalyst. It is a device that controls the catalyst regeneration device 100 so as to wash the 10.

(Control device configuration)
FIG. 3 is a schematic block diagram showing the configuration of the control device 50.
The control device 50 includes a control unit 110 and an input receiving unit 120.

The control unit 110 receives a signal from the input receiving unit 120 and controls the support device 40 so that the catalyst 10 is immersed in the first chemical solution 31. Further, the control unit 110 receives a signal from the input receiving unit 120 and controls the support device 40 so that the catalyst 10 is immersed in the second chemical solution 32. Further, the control unit 110 receives a signal from the input receiving unit 120 and controls the support device 40 so that the catalyst 10 is immersed in the first finishing cleaning liquid 33. Further, the control unit 110 receives a signal from the input receiving unit 120 and controls the support device 40 so that the catalyst 10 is immersed in the second finishing cleaning liquid 34. Further, the control unit 110 controls to move the catalyst 10 to the liquid drain stand 60 and the hot air blower 70.

The input receiving unit 120 receives an input from the user of the catalyst regeneration device 100 and outputs a signal indicating the input to the control unit 110. Examples of the input receiving unit 120 include a touch panel and an operation lever.

For example, when the input receiving unit 120 is a touch panel, the input receiving unit 120 accepts the input of the position of the hoist on the rail 41 and the input of the winding and unwinding of the wire rope on the display device. For example, when the input receiving unit 120 is an operating lever, the input receiving unit 120 includes a hoist operating lever capable of inputting the position of the hoist on the rail 41 and a wire rope operating lever capable of inputting winding and unwinding of the wire rope.

(Example of usage of catalyst regeneration device)
FIG. 4 is a flowchart showing an example of the usage mode of the catalyst regeneration device 100.

The user of the catalyst regeneration device 100 washes the catalyst 10 with water (step S1). For example, the user wash the catalyst 10 with water by roughly washing the catalyst 10 with water, evacuating with water, and washing with jet water.

The user of the catalyst regeneration device 100 fixes the catalyst 10 to the support device 40 so that the support device 40 supports the catalyst 10 (step S2). The user of the catalyst regeneration device 100 uses, for example, a nylon sling to fix the wire rope of the support device 40 to the catalyst 10. When the support device 40 supports the catalyst 10, the catalyst 10 is fixed so that the liquid level of the first chemical solution 31 and the opening surface of the catalyst 10 face each other when the first chemical solution 31 is injected into the first washing tank 21. It is done like this.

The user of the catalyst regeneration device 100 injects the first chemical solution 31 into the first cleaning tank 21 and injects the second chemical solution 32 into the second cleaning tank 22. Further, the user of the catalyst regeneration device 100 injects the first finishing cleaning liquid 33 into the third cleaning tank 23, and injects the second finishing cleaning liquid 34 into the fourth cleaning tank 24. (Step S3).
The user of the catalyst regeneration device 100 may perform the operation of step S3 in advance before step S1.

Here, the number of times that the catalyst 10 of the first chemical solution 31 and the second chemical solution 32 has been immersed is, for example, the number of times the catalyst 10 is immersed in the first chemical solution 31 and the second chemical solution 32, and then the surface of the catalyst 10 is attached. The number of times the removal rate of kimono (ash, etc.) is 95% or more.
Each time the catalyst 10 is immersed in the first chemical solution 31 and the second chemical solution 32, the removal rate of deposits on the surface of the catalyst 10 decreases. When the user of the catalyst regeneration device 100 immerses the catalyst 10 in the first chemical solution 31 and the second chemical solution 32 every time the catalyst 10 of the first chemical solution 31 and the second chemical solution 32 has been immersed. , The removal rate of deposits on the surface of the catalyst 10 is investigated in advance.

For example, when the catalyst 10 of the first chemical solution 31 has been immersed once, twice, or three times, the removal rate of the deposits on the surface of the catalyst 10 of the first chemical solution 31. Is over 95%. That is, when the catalyst 10 of the first chemical solution 31 has been immersed in the catalyst 10 once, twice, or three times, the user does not inject the second chemical solution 32 into the second washing tank 22. .. On the other hand, when the catalyst 10 of the first chemical solution 31 has been immersed four or five times, the removal rate of the deposits on the surface of the catalyst 10 of the first chemical solution 31 is not 95% or more. .. That is, when the catalyst 10 of the first chemical solution 31 has been immersed four times or more, the user injects the second chemical solution 32 into the second washing tank 22. The second chemical solution 32 to be injected here is a chemical solution such that the removal rate of deposits on the surface of the catalyst 10 becomes 95% or more after the catalyst 10 is immersed in the first chemical solution 31 and the second chemical solution 32. For example, the second chemical solution 32 is a chemical solution in which the catalyst 10 has been immersed once. Further, in the first chemical solution 31 or the second chemical solution 32 in which the catalyst 10 has been immersed 6 times or more, the catalyst 10 is immersed in the first chemical solution 31 and the second chemical solution 32 after the catalyst 10 is immersed. The removal rate of deposits on the surface of the surface does not exceed 95%. Therefore, the first chemical solution 31 or the second chemical solution 32 in which the catalyst 10 has been immersed 6 times or more is not used.
In the above description, the number of times that the catalyst 10 of the first chemical solution 31 and the second chemical solution 32 has been immersed is an example. The above number of times may vary depending on the degree of clogging of the opening surface of the catalyst 10 by ash, the concentration and components of the first chemical solution 31 and the second chemical solution 32, and the like.

Further, the number of times that the catalyst 10 of the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34 has been immersed is attached to the catalyst 10 after the catalyst 10 is immersed in the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34. The number of times the removal rate of the first chemical solution 31 or the second chemical solution 32 is 95% or more.
Every time the catalyst 10 is immersed in the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34, the removal rate of the first chemical liquid 31 or the second chemical liquid 32 attached to the catalyst 10 decreases. The user of the catalyst regeneration device 100 immerses the catalyst 10 in the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34 every time the catalyst 10 of the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34 has been immersed. The removal rate of the first chemical solution 31 or the second chemical solution 32 attached to the catalyst 10 when the catalyst 10 is allowed to be removed is checked in advance.

For example, when the catalyst 10 of the first finishing cleaning liquid 33 has been immersed once, twice, or three times, the first chemical solution 31 or the catalyst 10 of the first finishing cleaning liquid 33 has been immersed. The removal rate of the second chemical solution 32 is 95% or more. That is, when the catalyst 10 of the first finishing cleaning liquid 33 has been immersed in the catalyst 10 once, twice, or three times, the user puts the second finishing cleaning liquid 34 in the fourth cleaning tank 24. Do not inject. On the other hand, when the catalyst 10 of the first finishing cleaning liquid 33 has been immersed 4 times or 5 times, the first chemical liquid 31 or the second chemical liquid 32 attached to the catalyst 10 of the first finishing cleaning liquid 33 The removal rate of is not more than 95%. That is, when the catalyst 10 of the first finishing cleaning liquid 33 has been immersed four times or more, the user injects the second finishing cleaning liquid 34 into the fourth cleaning tank 24. The second finishing cleaning liquid 34 injected here has a removal rate of 95 for the first chemical liquid 31 or the second chemical liquid 32 attached to the catalyst 10 after the catalyst 10 is immersed in the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34. It is a finish cleaning liquid that becomes% or more. For example, the second finishing cleaning liquid 34 is a finishing cleaning liquid in which the catalyst 10 has been immersed once. Further, in the first finish cleaning liquid 33 or the second finish cleaning liquid 34 in which the catalyst 10 has been immersed 6 times or more, the catalyst 10 is immersed in the first finish cleaning liquid 33 and the second finish cleaning liquid 34. Later, with respect to the catalyst 10, the removal rate of the first chemical solution 31 or the second chemical solution 32 does not become 95% or more. Therefore, the first finishing cleaning liquid 33 or the second finishing cleaning liquid 34 in which the catalyst 10 has been immersed 6 times or more is not used.
In the above description, the number of times that the catalyst 10 of the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34 has been immersed is an example. The above number of times may vary depending on the degree of clogging of the opening surface of the catalyst 10 by ash, the concentration and components of the first finishing cleaning liquid 33 and the second finishing cleaning liquid 34, and the like.

The user of the catalyst regeneration device 100 uses the control device 50 to immerse the catalyst 10 in the first chemical solution 31 (step S4).
For example, the user of the catalyst regeneration device 100 immerses the catalyst 10 in the first chemical solution 31 by the following operations.

The user of the catalyst regeneration device 100 inputs to the input receiving unit 120 that the hoist of the support device 40 is moved onto the first washing tank 21 after the support device 40 winds up the wire rope. That is, the input receiving unit 120 receives an input from the user of the catalyst regeneration device 100 that the catalyst regeneration device 100 lifts the catalyst 10 and moves it onto the first cleaning tank 21. Further, the user of the catalyst regeneration device 100 uses the operation lever, which is the input receiving unit 120, to input that the wire rope is wound up and that the hoist is moved onto the first cleaning tank 21. The control unit 110 of the control device 50 receives the signal output by the input receiving unit 120, and controls the support device 40 to lift the catalyst 10 and move it onto the first cleaning tank 21. The control unit 110 receives the signal output by the input receiving unit 120, winds the wire rope to the maximum height, and controls to lift the catalyst 10. After the lifting, the control unit 110 controls the hoist to move to the position of the rail 41 corresponding to the position on the first cleaning tank 21 stored in the control device 50.
The user of the catalyst regeneration device 100 inputs to the input receiving unit 120 to wind the wire rope toward the first washing tank 21. That is, the input receiving unit 120 receives an input from the user of the catalyst regeneration device 100 to the effect that the catalyst 10 is dropped into the first cleaning tank 21. The control unit 110 receives the signal output by the input receiving unit 120, the support device 40 lowers the wire rope to the first cleaning tank 21, and the catalyst 10 fixed to the wire rope is the first cleaning tank 21. 1 Control so as to be immersed in the chemical solution 31.

The user of the catalyst regeneration device 100 uses the control device 50 to take out the catalyst 10 from the first chemical solution 31 and immerse it in the second chemical solution 32 (step S5).
For example, the user of the catalyst regeneration device 100 takes out the catalyst 10 from the first chemical solution 31 and immerses it in the second chemical solution 32 by the following operation.

The user of the catalyst regeneration device 100 inputs to the input receiving unit 120 to wind up the wire rope. That is, the input receiving unit 120 receives an input from the user of the catalyst regeneration device 100 to the effect that the catalyst regeneration device 100 lifts the catalyst 10. The control unit 110 receives the signal output by the input receiving unit 120, and the support device 40 controls the wire rope to be wound up to the maximum height. That is, the support device 40 lifts the catalyst 10 and moves it onto the first cleaning tank 21. The user of the catalyst regeneration device 100 inputs to the input receiving unit 120 to move the hoist of the support device 40 to the position of the rail 41 corresponding to the second cleaning tank 22. That is, the input receiving unit 120 receives an input from the user of the catalyst regeneration device 100 that the support device 40 moves the catalyst 10 onto the second cleaning tank 22. The control unit 110 receives the signal output by the input receiving unit 120 and controls the support device 40 to move the hoist to the position of the rail 41 corresponding to the second cleaning tank 22. In this case, the control device 50 stores the position of the rail 41 corresponding to the second cleaning tank 22 in advance. Under the control of the control unit 110, the support device 40 moves the catalyst 10 onto the second cleaning tank 22. The user of the catalyst regeneration device 100 makes an input to the input receiving unit 120 to wind the wire rope toward the second washing tank 22. That is, the input receiving unit 120 receives an input to lower the catalyst 10 into the second cleaning tank 22 from the user of the catalyst regeneration device 100. The control unit 110 receives the signal output by the input receiving unit 120, the support device 40 lowers the wire rope to the second cleaning tank 22, and the catalyst 10 fixed to the wire rope is the second cleaning tank 22. 2 Control so as to immerse in the chemical solution 32.

The removal rate of the deposits on the surface of the catalyst 10 in the first chemical solution 31 in which the catalyst 10 has been immersed is the removal rate of the deposits on the surface of the catalyst 10 in the first chemical solution 31 in which the catalyst 10 has not been immersed. Lower. However, even if the removal rate is low, the first chemical solution 31 having the catalyst 10 immersed 5 times or less can remove certain deposits.
By immersing the catalyst 10 in the first chemical solution 31 in step S4 and then immersing the catalyst 10 in the second chemical solution 32 in step S5, the second chemical solution 32 is compared with the case where the first chemical solution 31 is not used. It will remove less deposits. That is, by using the first chemical solution 31, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration device 100 can use the second chemical solution 32 while replacing it with a smaller number of times as compared with the case where the first chemical solution 31 is not used, and even if a smaller chemical solution is used, the catalyst 10 can be used. The deposits on the surface can be removed.

The user of the catalyst regeneration device 100 uses the control device 50 to take out the catalyst 10 from the second chemical solution 32 and immerse it in the first finishing cleaning solution 33 (step S6).
In this case, the user takes out the catalyst 10 from the second chemical solution 32, leaves it for a certain period of time, and then immerses it in the first finishing cleaning solution 33, so that the first chemical solution 31 and the second chemical solution 32 attached to the catalyst 10 are immersed. May be immersed in the first finishing cleaning liquid 33 after cutting.
The specific operation in which the user takes out the catalyst 10 from the second chemical solution 32 using the control device 50 and immerses the catalyst 10 in the first finishing cleaning liquid 33 is the same as in step S5.

The user of the catalyst regeneration device 100 uses the control device 50 to take out the catalyst 10 from the first finishing cleaning liquid 33 and immerse it in the second finishing cleaning liquid 34 (step S7).
The specific operation in which the user takes out the catalyst 10 from the first finishing cleaning liquid 33 using the control device 50 and immerses the catalyst 10 in the second finishing cleaning liquid 34 is the same as in step S5.

The user of the catalyst regeneration device 100 uses the control device 50 to take out the catalyst 10 from the second finishing cleaning liquid 34 and move it onto the drainage table 60 (step S8).
The specific operation in which the user takes out the catalyst 10 from the second finishing cleaning liquid 34 using the control device 50 and moves it onto the liquid drain table 60 is the same as in step S5.

The user of the catalyst regeneration device 100 leaves the catalyst 10 moved to the drainage table 60 (step S9). As a result, the liquids of the first chemical liquid 31, the second chemical liquid 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34 attached to the catalyst 10 are cut off.

The user of the catalyst regeneration device 100 uses the hot air blower 70 to blow hot air to the catalyst 10 to dry the catalyst 10 (step S10). As a result, the liquids of the first chemical liquid 31, the second chemical liquid 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34 attached to the catalyst 10 are cut off.

(Action / effect)
The method for regenerating the catalyst according to the present disclosure is to wash the catalyst 10 with water, to wet the washed catalyst 10 with the repeatedly used first chemical solution 31, and to wet the catalyst 10 with the first chemical solution 31 to the second. It comprises wetting the chemical solution 32 and washing the catalyst 10 with water or a finishing cleaning solution which is sulfamic acid-containing water, and the first chemical solution 31 and the second chemical solution 32 contain at least an inorganic acid and a fluorine compound. Inorganic acids include hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid.

When the catalyst regeneration method is used, after removing the deposits adhering to the surface of the catalyst 10 using the first chemical solution 31 that has been repeatedly used, the catalyst 10 is wetted with the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can use the catalyst 10 while replacing it with a smaller number of times as compared with the case where the catalyst 10 is wetted once with a predetermined chemical solution, and the catalyst 10 can be used by using a smaller amount of the chemical solution. The deposits on the surface of the surface can be removed.

Further, the catalyst 10 of the catalyst regeneration method is a denitration catalyst.
Thereby, the user of the catalyst regeneration method can remove the deposits on the surface of the denitration catalyst by using a smaller amount of the chemical solution as compared with the case where the denitration catalyst is wetted once with a predetermined chemical solution.

Further, the number of times of repeated use of the second chemical solution 32 in the catalyst regeneration method is less than the number of times of repeated use of the first chemical solution 31.

When the catalyst regeneration method is used, after removing the deposits adhering to the surface of the catalyst 10 using the first chemical solution 31 which is frequently used repeatedly, the catalyst 10 is wetted with the second chemical solution 32 which is used less frequently. Remove the kimono. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is wetted once with a predetermined chemical solution.

Further, to wash the catalyst 10 of the catalyst regeneration method with the finish cleaning liquid, the catalyst 10 is washed with the first finish cleaning liquid 33 which is a repeatedly used finish cleaning liquid, and the catalyst 10 washed with the first finish cleaning liquid 33 is used. The present invention includes washing with a second finishing cleaning liquid 34, which is a finishing cleaning liquid.

When the catalyst regeneration method is used, after removing the deposits attached to the catalyst 10 by using the repeatedly used first finishing cleaning liquid 33, the catalyst 10 is wetted with the second finishing cleaning liquid 34, and the catalyst 10 is attached to the catalyst 10. Remove the kimono. Thereby, the user of the catalyst regeneration method can increase the number of times that the second finishing cleaning liquid 34 can be used. Therefore, the user of the catalyst regeneration method can remove the deposits attached to the catalyst 10 by using a smaller amount of the finish cleaning liquid than in the case where the catalyst 10 is wetted once with a predetermined finish cleaning liquid.

Further, wetting the water-washed catalyst 10 in the catalyst regeneration method with the first chemical solution 31 means immersing the water-washed catalyst 10 in the first chemical solution 31, and the catalyst 10 wetted with the first chemical solution 31 is the first. 2 Wetting with the chemical solution 32 means immersing the catalyst 10 immersed in the first chemical solution 31 in the second chemical solution 32.

When the catalyst regeneration method is used, after removing the deposits adhering to the surface of the catalyst 10 using the first chemical solution 31 that has been repeatedly used, the catalyst 10 is immersed in the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is immersed in the predetermined chemical solution once.

Further, the first chemical solution 31 of the catalyst regeneration method is a chemical solution that has been used repeatedly one or more times.
When the catalyst regeneration method is used, the catalyst 10 is wetted with the second chemical solution 32 after removing the deposits adhering to the surface of the catalyst 10 by using the first chemical solution 31 that has been used repeatedly once or more. To remove. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is wetted once with a predetermined chemical solution.

The catalyst regeneration device 100 according to the present disclosure includes a support device 40 that moves the catalyst 10 in the vertical and horizontal directions while supporting the catalyst 10, and a control device 50 that controls the support device 40. The catalyst 10 is lowered and controlled to be repeatedly immersed in the used first chemical solution 31, the catalyst 10 is controlled to be lowered and immersed in the second chemical solution 32, and the catalyst 10 is lowered and finished. The first chemical solution 31 and the second chemical solution 32 contain at least an inorganic acid and a fluorine compound, the inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid, and the finish cleaning solution contains at least an inorganic acid and a fluorine compound. , Water or sulfamic acid-containing water.

The catalyst regeneration device 100 removes the deposits adhering to the surface of the catalyst 10 by using the first chemical solution 31 that has been repeatedly used, and then immerses the catalyst 10 in the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the catalyst regeneration device 100 can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is immersed in the predetermined chemical solution once.

In the program according to the present disclosure, the catalyst 10 is repeatedly immersed in the used first chemical solution 31 in the control device 50 of the support device 40 that moves the catalyst 10 in the vertical and horizontal directions while supporting the catalyst 10. This is a program for executing the process of lowering the catalyst 10 and immersing it in the second chemical solution 32 and lowering the catalyst 10 and immersing it in the finishing cleaning liquid, wherein the first chemical solution 31 and the second chemical solution are executed. Reference numeral 32 contains at least an inorganic acid and a fluorine compound, the inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid, and the finishing cleaning solution is water or sulfamic acid-containing water.

The user of the program removes the deposits adhering to the surface of the catalyst 10 by using the first chemical solution 31 that has been repeatedly used, and then immerses the catalyst 10 in the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the program can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is immersed in the predetermined chemical solution once.

[Second Embodiment]
Hereinafter, the catalyst regeneration device 100 according to the second embodiment will be described.

(Composition of catalyst regeneration device)
FIG. 5 is a diagram showing the configuration of the catalyst regeneration device 100 according to the second embodiment.
The configuration of the catalyst regeneration device 100 according to the second embodiment is based on the configuration of the catalyst regeneration device 100 according to the first embodiment, that is, the second cleaning tank 22, the third cleaning tank 23, and the fourth cleaning tank. It is a configuration that does not include 24. Further, the catalyst regeneration device 100 according to the second embodiment includes a nozzle 80, a first tank 90, a first pump 91, and the like, in addition to the configuration of the catalyst regeneration device 100 according to the first embodiment. It is configured to include a second tank 93 and a second pump 94.

Four separated storage spaces are provided inside the first tank 90, and the first chemical solution 31, the second chemical solution 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34 are provided in each storage space. It is stored.

The first pump 91 supplies the first chemical solution 31, the second chemical solution 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34 stored in the first tank 90 to the nozzle 80 by using air pressure or the like.

The nozzle 80 is a plurality of injection ports (not shown) provided on the side where the nozzle 80 faces the first cleaning tank 21 while moving in the A direction, and the first chemical solution 31, the second chemical solution 32, and the first chemical solution 32 are provided. The finish cleaning liquid 33 and the second finish cleaning liquid 34 are sprayed so as to face the opening surface of the catalyst 10.
The amount of each of the first chemical solution 31, the second chemical solution 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34 to be sprayed is about half the volume of the catalyst 10.
The catalyst regeneration device 100 may include a plurality of nozzles 80. In this case, the catalyst regeneration device 100 moves the plurality of nozzles 80 above the catalyst 10 after the catalyst 10 is lowered into the first cleaning tank 21, and uses the plurality of nozzles 80 to move the opening surface of the catalyst 10. Inject against.

The second pump 94 moves the first chemical solution 31, the second chemical solution 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34 of the first cleaning tank 21 to the second tank 93 by using air pressure or the like.
The second tank 93 is provided with four separated storage spaces, and the first chemical solution 31, the second chemical solution 32, the first finishing cleaning liquid 33, and the first chemical solution 33 injected by the second pump 94 into each storage space are provided. 2 The finishing cleaning liquid 34 is stored.

The control device 50 according to the second embodiment receives input from the user of the catalyst regeneration device 100 and controls the first pump 91, the second pump 94, and the nozzle 80 to operate. The control device may be attached to each of the first pump 91, the second pump 94, and the nozzle 80.

(Example of usage of catalyst regeneration device)
FIG. 6 is a flowchart showing an example of the usage mode of the catalyst regeneration device 100.

The operations of steps S1 and S2 of the usage mode of the catalyst regeneration device 100 according to the first embodiment are performed.
The user of the catalyst regeneration device 100 injects the first chemical solution 31, the second chemical solution 32, the first finishing cleaning liquid 33, and the second finishing cleaning liquid 34 into the first tank 90 (step S13).

The user of the catalyst regeneration device 100 moves the catalyst 10 to the first washing tank 21 by using the control device 50 (step S14).
The specific operation of moving the catalyst 10 to the first cleaning tank 21 is the same as step S8 of the usage mode of the catalyst regeneration device 100 according to the first embodiment.

The user of the catalyst regeneration device 100 operates the first pump 91 by using the control device 50 so that the first chemical solution 31 is supplied from the first tank 90 to the nozzle 80. The nozzle 80 ejects the first chemical solution 31 facing the opening surface of the catalyst 10 while moving in the A direction (step S15). After the operation of step S15, the nozzle 80 moves in the opposite direction of the A direction and returns to the position before step S15. Further, after the operation of step S15, the control device 50 operates the second pump 94 to move the first chemical solution 31 of the first cleaning tank 21 to the second tank 93.

By injecting the first chemical solution 31 toward the opening surface of the catalyst 10 using the nozzle 80, the opening surface of the catalyst 10 is wetted by the first chemical solution 31. Therefore, as compared with the case where the catalyst 10 is immersed in the first chemical solution 31 as in the catalyst regeneration device 100 according to the first embodiment, the catalyst regeneration device 100 wets the catalyst 10 with a smaller amount of the chemical solution. be able to.

The user of the catalyst regeneration device 100 operates the first pump 91 by using the control device 50 so that the second chemical solution 32 is supplied from the first tank 90 to the nozzle 80. The nozzle 80 ejects the second chemical solution 32 facing the opening surface of the catalyst 10 while moving in the A direction (step S16). After the operation of step S16, the nozzle 80 moves in the opposite direction of the A direction and returns to the position before step S16. Further, after the operation of step S16, the control device 50 operates the second pump 94 to move the second chemical solution 32 of the first cleaning tank 21 to the second tank 93.

The user of the catalyst regeneration device 100 operates the first pump 91 by using the control device 50 so that the first finishing cleaning liquid 33 is supplied from the first tank 90 to the nozzle 80. The nozzle 80 ejects the first finishing cleaning liquid 33 facing the opening surface of the catalyst 10 while moving in the A direction (step S17). After the operation of step S17, the nozzle 80 moves in the opposite direction of the A direction and returns to the position before step S17. Further, after the operation of step S17, the control device 50 operates the second pump 94 to move the first finishing cleaning liquid 33 of the first cleaning tank 21 to the second tank 93.

The user of the catalyst regeneration device 100 operates the first pump 91 by using the control device 50 so that the second finishing cleaning liquid 34 is supplied from the first tank 90 to the nozzle 80. The nozzle 80 ejects the second finishing cleaning liquid 34 facing the opening surface of the catalyst 10 while moving in the A direction (step S18). After the operation of step S18, the nozzle 80 moves in the opposite direction of the A direction and returns to the position before step S18. Further, after the operation of step S18, the control device 50 operates the second pump 94 to move the second finishing cleaning liquid 34 of the first cleaning tank 21 to the second tank 93.

The user of the catalyst regeneration device 100 takes out the catalyst 10 from the first washing tank 21 and moves it to the liquid drain stand 60 by using the control device 50 (step S19). The specific operation of taking out the catalyst 10 from the first washing tank 21 and moving it to the drainage table 60 is the same as step S8 of the usage mode of the catalyst regeneration device 100 according to the first embodiment.

The operations of steps S9 and S10 of the usage mode of the catalyst regeneration device 100 according to the first embodiment are performed. As in the first embodiment, a cleaning tank may be provided for each cleaning liquid, and the cleaning liquid may be sprayed on each cleaning tank. The first tank 90, the first pump 91, the nozzle 80, and the second pump may be used. 94, the second tank 93 may be in each cleaning liquid.

(Action / effect)
The catalyst 10 of the catalyst regeneration method according to the present disclosure is a honeycomb structure or plate-shaped catalyst 10, and wetting the catalyst 10 washed with water with the first chemical solution 31 causes the opening surface of the honeycomb structure or plate-shaped catalyst 10 to be wetted. Wetting the catalyst 10 wetted with the first chemical solution 31 with the second chemical solution 32, including injecting the first chemical solution 31 from the opposite positions, faces the opening surface of the honeycomb structure or the plate-shaped catalyst 10. It includes injecting the second chemical solution 32 from the position.

When the catalyst regeneration method is used, the first chemical solution 31 and the second chemical solution 32 are sprayed from a position facing the opening surface of the honeycomb structure or the plate-shaped catalyst to wet the catalyst 10. The user of the catalyst regeneration method can wet the catalyst 10 with a smaller amount of the first chemical solution 31 and the second chemical solution 32 as compared with the case of using another method for wetting the catalyst 10. Thereby, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10.

[Computer configuration]
FIG. 7 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.
The computer 1100 includes a processor 1110, a main memory 1120, a storage 1130, and an interface 1140.
The control device 50 described above is mounted on the computer 1100. The operation of each of the above-mentioned processing units is stored in the storage 1130 in the form of a program. The processor 1110 reads a program from the storage 1130, expands it into the main memory 1120, and executes the above processing according to the program. Further, the processor 1110 secures a storage area corresponding to each of the above-mentioned storage units in the main memory 1120 according to the program.

The program may be for realizing a part of the functions exerted by the computer 1100. For example, the program may exert its function in combination with another program already stored in the storage 1130, or in combination with another program mounted on another device. In another embodiment, the computer 1100 may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or in place of the above configuration. Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, some or all of the functions realized by the processor 1110 may be realized by the integrated circuit.

Examples of the storage 1130 include magnetic disks, magneto-optical disks, semiconductor memories, and the like. The storage 1130 may be internal media directly connected to the bus of computer 1100, or external media connected to the computer via interface 1140 or a communication line. When this program is distributed to the computer 1100 via a communication line, the distributed computer 1100 may expand the program to the main memory 1120 and execute the above processing. In at least one embodiment, the storage 1130 is a non-temporary tangible storage medium.

Further, the program may be for realizing a part of the above-mentioned functions. Further, the program may be a so-called difference file (difference program) that realizes the above-mentioned function in combination with another program already stored in the storage 1130.

[Additional Notes]
The catalyst regeneration device 100 according to each embodiment is grasped as follows, for example.

(1) The method for regenerating the catalyst according to the present disclosure is to wash the catalyst 10 with water, to wet the washed catalyst 10 with the repeatedly used first chemical solution 31, and to wet the catalyst 10 with the first chemical solution 31. , The second chemical solution 32 is wetted, and the catalyst 10 is washed with water or a finishing cleaning solution which is sulfamic acid-containing water. The inorganic acid includes hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid.

When the catalyst regeneration method is used, after removing the deposits adhering to the surface of the catalyst 10 using the first chemical solution 31 that has been repeatedly used, the catalyst 10 is wetted with the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can use the catalyst 10 while replacing it with a smaller number of times as compared with the case where the catalyst 10 is wetted once with a predetermined chemical solution, and the catalyst 10 can be used by using a smaller amount of the chemical solution. The deposits on the surface of the surface can be removed.

(2) Further, the catalyst 10 of the catalyst regeneration method is a denitration catalyst.
Thereby, the user of the catalyst regeneration method can remove the deposits on the surface of the denitration catalyst by using a smaller amount of the chemical solution as compared with the case where the denitration catalyst is wetted once with a predetermined chemical solution.

(3) Further, the number of times the second chemical solution 32 is repeatedly used is less than the number of times the first chemical solution 31 is repeatedly used.

When the catalyst regeneration method is used, after removing the deposits adhering to the surface of the catalyst 10 using the first chemical solution 31 which is frequently used repeatedly, the catalyst 10 is wetted with the second chemical solution 32 which is used less frequently. Remove the kimono. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is wetted once with a predetermined chemical solution.

(4) Further, in order to wash the catalyst 10 of the catalyst regeneration method with the finish cleaning liquid, the catalyst 10 was washed with the first finish cleaning liquid 33, which is a repeatedly used finish cleaning liquid, and with the first finish cleaning liquid 33. The catalyst 10 includes washing with a second finishing cleaning liquid 34, which is a finishing cleaning liquid.

When the catalyst regeneration method is used, after removing the deposits attached to the catalyst 10 by using the repeatedly used first finishing cleaning liquid 33, the catalyst 10 is wetted with the second finishing cleaning liquid 34, and the catalyst 10 is attached to the catalyst 10. Remove the kimono. Thereby, the user of the catalyst regeneration method can increase the number of times that the second finishing cleaning liquid 34 can be used. Therefore, the user of the catalyst regeneration method can remove the deposits attached to the catalyst 10 by using a smaller amount of the finish cleaning liquid than in the case where the catalyst 10 is wetted once with a predetermined finish cleaning liquid.

(5) Further, wetting the water-washed catalyst 10 in the catalyst regeneration method with the first chemical solution 31 means immersing the water-washed catalyst 10 in the first chemical solution 31, and the catalyst 10 wetted with the first chemical solution 31. To wet the second chemical solution 32 is to immerse the catalyst 10 immersed in the first chemical solution 31 in the second chemical solution 32.

When the catalyst regeneration method is used, after removing the deposits adhering to the surface of the catalyst 10 using the first chemical solution 31 that has been repeatedly used, the catalyst 10 is immersed in the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is immersed in the predetermined chemical solution once.

(6) Further, the first chemical solution 31 of the catalyst regeneration method is a chemical solution that has been used repeatedly one or more times.
When the catalyst regeneration method is used, the catalyst 10 is wetted with the second chemical solution 32 after removing the deposits adhering to the surface of the catalyst 10 by using the first chemical solution 31 that has been used repeatedly once or more. To remove. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is wetted once with a predetermined chemical solution.

(7) The catalyst regeneration device 100 according to the present disclosure includes a support device 40 that moves the catalyst 10 in the vertical direction while supporting the catalyst 10, and a control device 50 that controls the support device 40. Controls the catalyst 10 to be lowered and immersed in the used first chemical solution 31 repeatedly, and controls the catalyst 10 to be lowered and immersed in the second chemical solution 32, and lowers the catalyst 10 downward. The first chemical solution 31 and the second chemical solution 32 contain at least an inorganic acid and a fluorine compound, and the inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid for finishing. The cleaning solution is water or sulfamic acid-containing water.

The catalyst regeneration device 100 removes the deposits adhering to the surface of the catalyst 10 by using the first chemical solution 31 that has been repeatedly used, and then immerses the catalyst 10 in the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the catalyst regeneration device 100 can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is immersed in the predetermined chemical solution once.

(8) In the program according to the present disclosure, the catalyst 10 is lowered downward in the control device 50 of the support device 40 that moves the catalyst 10 in the vertical direction while supporting the catalyst 10, and is repeatedly immersed in the used first chemical solution 31. It is a program for executing the process of lowering the catalyst 10 and immersing it in the second chemical solution 32, and lowering the catalyst 10 and immersing it in the finishing cleaning liquid. 2 The chemical solution 32 contains at least an inorganic acid and a fluorine compound, the inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid, and the finish cleaning solution is water or sulfamic acid-containing water.

The user of the program removes the deposits adhering to the surface of the catalyst 10 by using the first chemical solution 31 that has been repeatedly used, and then immerses the catalyst 10 in the second chemical solution 32 to remove the deposits. As a result, the number of times that the second chemical solution 32 can be used increases. Therefore, the user of the program can remove the deposits on the surface of the catalyst 10 by using a smaller amount of the chemical solution as compared with the case where the catalyst 10 is immersed in the predetermined chemical solution once.

(9) The catalyst 10 of the catalyst regeneration method according to the present disclosure is a honeycomb structure or plate-shaped catalyst 10, and wetting the water-washed catalyst 10 with the first chemical solution 31 is a honeycomb structure or plate-shaped catalyst 10. Including spraying the first chemical solution 31 from a position facing the opening surface, and wetting the catalyst 10 wetted with the first chemical solution 31 with the second chemical solution 32 is the opening surface of the honeycomb structure or the plate-shaped catalyst 10. It includes injecting the second chemical solution 32 from the position facing the honeycomb.

When the catalyst regeneration method is used, the first chemical solution 31 and the second chemical solution 32 are sprayed from a position facing the opening surface of the honeycomb structure or the plate-shaped catalyst to wet the catalyst 10. The user of the catalyst regeneration method can wet the catalyst 10 with a smaller amount of the first chemical solution 31 and the second chemical solution 32 as compared with the case of using another method for wetting the catalyst 10. Thereby, the user of the catalyst regeneration method can remove the deposits on the surface of the catalyst 10.

The present disclosure relates to catalyst regeneration methods, catalyst regeneration devices and programs.
According to the present disclosure, the catalyst can be used while being replaced a smaller number of times as compared with the case where the catalyst is wetted with a predetermined chemical solution once to remove the deposits, and the deposits can be used by using a smaller amount of the chemical solution. Can be removed.

10 Catalyst 11 Cell 21 1st cleaning tank 22 2nd cleaning tank 23 3rd cleaning tank 24 4th cleaning tank 31 1st chemical liquid 32 2nd chemical liquid 33 1st finish cleaning liquid 34 2nd finish cleaning liquid 40 Support device 41 Rail 50 Control device 60 Drainer 70 Hot air blower 80 Nozzle 90 1st tank 91 1st pump 93 2nd tank 94 2nd pump 100 Catalyst regenerator 110 Control unit 120 Input receiving unit 1100 Computer 1110 Processor 1120 Main memory 1130 Storage 1140 Interface

Claims (9)

1. Washing the catalyst with water and
   Wetting the catalyst washed with water with the used first chemical solution repeatedly
   Wetting the catalyst wet with the first chemical solution with the second chemical solution
   Washing the catalyst with water or a finishing cleaning solution containing sulfamic acid can be used.
   Including
   The first chemical solution and the second chemical solution contain at least an inorganic acid and a fluorine compound.
   The inorganic acid includes hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid.
   How to regenerate the catalyst.
2. The catalyst is a denitration catalyst.
   The method for regenerating a catalyst according to claim 1.
3. The number of times the second chemical solution is repeatedly used is less than the number of times the first chemical solution is repeatedly used.
   The method for regenerating a catalyst according to claim 1.
4. Washing the catalyst with the finishing cleaning solution is not possible.
   Washing the catalyst with the first finish cleaning solution, which is a repeatedly used finish cleaning solution,
   The catalyst washed with the first finishing cleaning liquid is washed with the second finishing cleaning liquid which is a finishing cleaning liquid.
   The method for regenerating a catalyst according to any one of claims 1 to 3, which comprises.
5. Wetting the catalyst washed with water with the first chemical solution means immersing the catalyst washed with water in the first chemical solution.
   Wetting the catalyst wet with the first chemical solution with the second chemical solution means immersing the catalyst immersed in the first chemical solution with the second chemical solution.
   The method for regenerating a catalyst according to any one of claims 1 to 4.
6. The catalyst is a honeycomb structure or plate-shaped catalyst.
   Wetting the catalyst washed with water with the first chemical solution includes injecting the first chemical solution from a position facing the opening surface of the honeycomb structure or the plate-shaped catalyst.
   Wetting the catalyst wet with the first chemical solution with the second chemical solution includes injecting the second chemical solution from a position facing the catalyst of the honeycomb structure or the plate-shaped opening surface.
   The method for regenerating a catalyst according to any one of claims 1 to 4.
7. The first chemical solution is a chemical solution that has been used repeatedly one or more times.
   The method for regenerating a catalyst according to any one of claims 1 to 6.
8. A support device that moves the catalyst in the vertical and horizontal directions while supporting the catalyst,
   A control device that controls the support device and
   Equipped with
   The control device controls the catalyst to be lowered and immersed in the used first chemical solution repeatedly, and the catalyst is controlled to be lowered and immersed in the second chemical solution, and the catalyst is lowered. Control to lower and immerse in finish cleaning solution,
   The first chemical solution and the second chemical solution contain at least an inorganic acid and a fluorine compound.
   The inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid.
   The finish cleaning liquid is water or sulfamic acid-containing water.
   Catalyst regenerator.
9. For the control device of the support device that moves the catalyst in the vertical direction while supporting the catalyst,
   By lowering the catalyst downward and repeatedly immersing it in the used first chemical solution,
   By lowering the catalyst downward and immersing it in the second chemical solution,
   By lowering the catalyst and immersing it in the finishing cleaning solution,
   Is a program that executes
   The first chemical solution and the second chemical solution contain at least an inorganic acid and a fluorine compound.
   The inorganic acid contains hydrochloric acid, hydrochloric acid and boric acid, or sulfamic acid.
   The finish cleaning liquid is water or sulfamic acid-containing water.
   program.

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