CN114761128A

CN114761128A - Catalyst cleaning method, catalyst cleaning device, and program

Info

Publication number: CN114761128A
Application number: CN202080079460.1A
Authority: CN
Inventors: 野地胜己; 岩本和大; 米村将直; 渡边义治; 向井大辅
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2019-11-20
Filing date: 2020-11-12
Publication date: 2022-07-15
Also published as: DE112020005720T5; WO2021100609A1; JP2021079341A

Abstract

The catalyst cleaning method comprises the following steps: supporting a catalyst having a honeycomb structure above the cleaning liquid so that an opening surface of the catalyst is opposed to a liquid surface of the cleaning liquid; the catalyst is lowered downward to be immersed in the cleaning liquid, and in the immersing step, the time from the contact of the catalyst with the cleaning liquid until the entire catalyst is immersed in the cleaning liquid is 5 minutes or more. Thus, the cleaning liquid gradually permeates through the lower opening surface of the catalyst, and the ash air that has penetrated into the catalyst is continuously separated from the upper opening surface of the catalyst.

Description

Catalyst cleaning method, catalyst cleaning device, and program

Technical Field

The present disclosure relates to a catalyst cleaning method, a catalyst cleaning device, and a program.

The present application claims priority to JP application No. 2019-209488, applied at 11/20/2019, the contents of which are incorporated herein by reference.

Background

Patent document 1 discloses the following technique: a denitration catalyst whose activity is lowered by a poisoning substance of silica/alumina/calcium sulfate system is washed with water in advance, and the poisoning substance is washed and removed by using a mixed solution of an organic acid and a fluoride, thereby improving the catalyst activity.

Prior art documents

Patent literature

Patent document 1: JP 4870217A

Disclosure of Invention

Problems to be solved by the invention

To remove Nitrogen Oxides (NO) from exhaust gas generated during combustion of power generation fuel_X) Sulfur Oxides (SO)_X) And a catalyst is used. When the catalyst is used, ash adheres to the exhaust gas, and the activity of removing nitrogen oxides and sulfur oxides is reduced.

In order to prevent such a decrease in the activity of the catalyst, ash adhering to the catalyst is removed.

The present disclosure has been made to solve the above problems, and provides a catalyst cleaning method, a catalyst cleaning device, and a program that can easily remove ash adhering to a catalyst.

Means for solving the problems

The catalyst cleaning method related by the disclosure comprises the following steps: supporting a catalyst having a honeycomb structure above the cleaning liquid so that an opening surface of the catalyst is opposed to a liquid surface of the cleaning liquid; the catalyst is lowered downward to be immersed in the cleaning liquid, and in the immersing step, the time from the contact of the catalyst with the cleaning liquid until the entire catalyst is immersed in the cleaning liquid is 5 minutes or more.

The catalyst cleaning method related by the disclosure comprises the following steps: supporting a catalyst having a honeycomb structure above the cleaning liquid so that an opening surface of the catalyst is opposed to a liquid surface of the cleaning liquid; the catalyst is lowered downwards to be immersed into the cleaning liquid, and the method comprises the following steps: and a step of bringing the catalyst to a standstill with a part of the catalyst protruding from the cleaning liquid, and immersing the entire catalyst in the cleaning liquid after the catalyst is brought to a standstill.

The catalyst cleaning device according to the present disclosure includes: a support device for moving the catalyst in the vertical direction while supporting the catalyst having a honeycomb structure; and a control device that controls the support device, wherein the control unit controls the support device such that a time from contact between the catalyst and the cleaning liquid until immersion of the entire catalyst in the cleaning liquid is 5 minutes or longer.

A program according to the present disclosure causes a control device of a support device that supports a catalyst having a honeycomb structure and moves the catalyst in a vertical direction to execute: the catalyst is lowered downward to be immersed in the cleaning liquid, and in the immersing step, the time from the contact of the catalyst with the cleaning liquid until the entire catalyst is immersed in the cleaning liquid is 5 minutes or more.

The catalyst cleaning device according to the present disclosure includes: a support device for moving the catalyst in the vertical direction while supporting the catalyst having the honeycomb structure; and a control device that controls the support device, wherein the control unit controls the catalyst to be stationary in a state in which a part of the catalyst protrudes from the cleaning liquid, and after the catalyst is stationary, the entire catalyst is immersed in the cleaning liquid.

A program according to the present disclosure causes a control device of a support device that supports a catalyst having a honeycomb structure and moves the catalyst in a vertical direction to execute: the catalyst is lowered downwards to be immersed into the cleaning liquid, and the following steps are executed: making a part of the catalyst stand still in a state of protruding from the cleaning solution; after standing still, the entire catalyst was immersed in a cleaning solution.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the catalyst cleaning method, the catalyst cleaning device, and the program of the present disclosure, ash fixed to the catalyst can be easily removed.

Drawings

Fig. 1 is a diagram showing an example of a catalyst according to an embodiment.

Fig. 2 is a diagram showing an example of the configuration of the catalyst cleaning device according to the embodiment.

Fig. 3 is a schematic block diagram showing a control device according to an embodiment.

Fig. 4 is a flowchart showing an example of a usage mode of the catalyst cleaning device according to the embodiment.

Fig. 5 is a flowchart showing an example of a usage mode of the catalyst cleaning device according to the embodiment.

Fig. 6 is a schematic block diagram showing a configuration of a catalyst cleaning device according to an embodiment.

Fig. 7 is a schematic block diagram showing a configuration of a computer according to at least 1 embodiment.

Fig. 8 is a graph showing the remaining rate of clogging according to the embodiment.

Detailed Description

< embodiment 1 >

Structure of catalyst cleaning device

The embodiments are described in detail below with reference to the accompanying drawings.

The catalyst cleaning device 100 according to embodiment 1 is a device for removing ash fixed to the catalyst 10.

Fig. 1 is a diagram showing an example of a catalyst 10 according to embodiment 1.

The catalyst 10 is a denitration catalyst that removes nitrogen oxides from exhaust gas generated by combustion of fuel. Examples of the fuel include a fuel used in a boiler for power generation such as a coal thermal power plant. The catalyst 10 may be other catalysts such as a desulfurization catalyst for removing sulfur oxides.

The catalyst 10 has a honeycomb structure in which a plurality of small cells 11 formed as hollow polygonal columns are filled with space. In the example of fig. 1, the catalyst 10 has 64 cells 11, but may be a catalyst 10 having a different number of cells 11.

The cross section of the cells 11 shown in fig. 1 is a quadrangle, but the cross section of the cells 11 may be different shapes such as a triangle, a pentagon, a rectangle, and a hexagon.

Fig. 2 is a schematic diagram showing an example of the configuration of the catalyst cleaning device 100 according to embodiment 1. The catalyst cleaning device 100 includes a 1 st cleaning tank 21, a 2 nd cleaning tank 22, a support device 40, a liquid removing table 60, a hot air blower 70, and a control device 50.

Fig. 2 shows an example of the configuration of the catalyst cleaning device 100, and the catalyst cleaning device 100 may have 1 cleaning tank or 3 or more cleaning tanks.

The 1 st cleaning tank 21 stores a 1 st cleaning liquid 31 for removing ash in the small compartment 11 attached to the catalyst 10. An acrylic resin container can be given as an example of the 1 st cleaning tank 21. Examples of the 1 st cleaning liquid 31 include a fluorine-based cleaning agent (e.g., a chemical liquid containing an inorganic acid and a fluorine compound), water, and the like.

The 1 st cleaning tank 21 is provided, for example, directly below a rail 41 on which the supporting device 40 travels.

The 2 nd cleaning tank 22 stores a 2 nd cleaning solution 32 for performing final cleaning. An acrylic resin container can be given as an example of the 2 nd cleaning tank 22. Examples of the 2 nd cleaning liquid 32 include a cleaning liquid composed of water or sulfamic acid.

The 2 nd cleaning tank 22 is provided, for example, directly below the rail 41 on which the supporting device 40 travels.

The support device 40 is a device that moves the catalyst 10 in the vertical direction and the lateral direction while supporting the catalyst 10. As an example of the support device 40, there can be mentioned a hoist which is attached to a rail 41 provided on a ceiling of a facility and can lift and lower a wire and move along the rail 41. The support device 40 supports the catalyst 10 so that the opening surface of the catalyst 10 faces the liquid surface of the 1 st cleaning liquid 31, and supports the catalyst 10 so that the opening surface of the catalyst 10 faces the liquid surface of the 2 nd cleaning liquid 32.

The liquid removal table 60 is a table on which the catalyst 10 is placed to remove the 2 nd cleaning liquid 32 adhering to the catalyst 10. The liquid table 60 may be used to remove the 1 st cleaning liquid 31 attached to the catalyst 10, in addition to the above.

The liquid removal table 60 is provided, 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 blows hot air to the catalyst 10 existing in the liquid removal table 60 to dry the catalyst 10.

The hot air blower 70 is provided, for example, directly below the rail 41 on which the support device 40 travels.

The control device 50 is a device as follows: the user of the catalyst cleaning device 100 receives an input, and controls the catalyst cleaning device 100 so that the catalyst 10 is immersed in the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 to clean the catalyst 10.

Structure of control device

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 supporting device 40 so that the catalyst 10 is immersed in the 1 st cleaning liquid 31. The control unit 110 receives an input from the input receiving unit 120, and controls the supporting device 40 so that the catalyst 10 is immersed in the 2 nd cleaning liquid 32. The control unit 110 controls the catalyst 10 to move toward the liquid removal table 60 and the hot air blower 70.

The input receiving unit 120 receives an input from a user of the catalyst cleaning 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 user operates the touch panel to input an instruction to the control unit 110 to change the position of the lifting machine on the rail 41 and to lift (lower) the wire. In the case where the input receiving unit 120 is an operation lever including a hoist operation lever and a wire rope operation lever, the user operates the hoist operation lever to input an instruction to change the position of the hoist to the control unit 110, and operates the wire rope operation lever to input an instruction to raise (lower) the wire rope to the control unit 110.

Example of Using method of catalyst cleaning device

Fig. 4 is a flowchart showing an example of the usage of the catalyst cleaning device 100.

The user of the catalyst cleaning device 100 checks the number of blockages on both opening surfaces of the catalyst 10 (step S1). By checking the number of blockages in step S1, the user of the catalyst cleaning device 100 can grasp the clogging state of ash in the catalyst 10.

The user of the catalyst washing 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 cleaning device 100 fixes the wire of the support device 40 and the catalyst 10 using, for example, a nylon sling. The catalyst 10 is fixed so that the liquid surface of the 1 st cleaning liquid 31 and the opening surface of the catalyst 10 face each other when the 1 st cleaning liquid 31 is injected into the 1 st cleaning tank 21 when the catalyst 10 is supported by the support device 40.

The user of the catalyst cleaning apparatus 100 injects the 1 st cleaning solution 31 into the 1 st cleaning tank 21 and injects the 2 nd cleaning solution 32 into the 2 nd cleaning tank 22 (step S3). The user of the catalyst cleaning apparatus 100 may inject the 1 st cleaning solution 31 into the 1 st cleaning tank 21 and the 2 nd cleaning solution 32 into the 2 nd cleaning tank 22 in advance before step S1, and the step S3 may be omitted.

The user of the catalyst cleaning device 100 inputs to the input receiving unit 120 that the hoisting machine of the supporting device 40 is moved to the upper side of the first cleaning tank 21 after the hoisting of the wire rope by the supporting device 40. That is, the input receiving unit 120 receives an input from the user of the catalyst cleaning device 100 to move the catalyst 10 to the upper side of the 1 st cleaning tank 21 by lifting the catalyst 10 by the catalyst cleaning device 100 (step S4).

For example, when the input receiving unit 120 is a touch panel, the user touches the touch panel to input an instruction to raise the wire rope to the maximum height to the control unit 110. Thereafter, the user operates the touch panel to input an instruction to the control unit 110 to move the hoist to the upper side of the first cleaning tank 21. In this case, the control device 50 stores the position of the rail 41 above the first cleaning tank 21 in advance.

In addition, when the input receiving unit 120 is an operation lever, the user operates the wire operation lever to input an instruction to raise the wire to the control unit 110. Then, the user operates the hoist operation lever to input an instruction to move the hoist to the upper side of the 1 st cleaning tank 21 to the control unit 110.

The control unit 110 of the control device 50 receives the signal output from the input receiving unit 120 in step S4, and controls the supporting device 40 to lift the catalyst 10 and move it to the upper side of the 1 st cleaning tank 21 (step S5).

For example, in step S5, the control unit 110 receives the signal output from the input receiving unit 120 in step S4, and performs control so that the catalyst 10 is lifted up by lifting the wire rope to the maximum height. After the raising, the control unit 110 controls the hoist to move to a position corresponding to the rail 41 above the first cleaning tank 21 stored in the control device 50.

The user of the catalyst cleaning device 100 inputs the input accepting unit 120 to pay out the wire into the 1 st cleaning tank 21. That is, the input accepting unit 120 accepts an input from the user of the catalyst cleaning device 100 to move the catalyst 10 down to the 1 st cleaning tank 21 (step S6).

The control unit 110 receives the signal output from the input receiving unit 120 in step S6, and performs control such that the support device 40 lowers the wire into the 1 st cleaning tank 21, and the catalyst 10 fixed to the wire is immersed in the 1 st cleaning solution 31 in the 1 st cleaning tank 21 (step S7).

In the case of step S7, for example, the speed of lowering the wire rope is stored in the control device 50 so that it takes 5 minutes from the time when the catalyst 10 fixed to the wire rope contacts the 1 st cleaning liquid 31 of the 1 st cleaning tank 21 to the time when the entire catalyst 10 is immersed in the 1 st cleaning liquid 31. The control unit 110 receives the signal output by the input receiving unit 120 in step S6, and controls the rope to be paid out at the speed based on the speed of paying out the rope stored in the control device 50.

For example, in the case of step S7, the speed of lowering the wire rope may be stored in the control device 50 so that the time from when the catalyst 10 fixed to the wire rope contacts the 1 st cleaning liquid 31 in the 1 st cleaning tank 21 to when the entire catalyst 10 is immersed in the 1 st cleaning liquid 31 becomes 5 minutes or more and 2 hours or less. That is, the speed of the lowering of the wire rope for a specific time within the above-described 5 minutes to 2 hours may be stored in the control device 50. In step S7, the catalyst 10 is continuously lowered toward the 1 st cleaning liquid 31.

If the input receiving unit 120 is an operation lever, the user of the catalyst cleaning device 100 may manually perform the above-described steps S6 and S7.

In step S7, it takes 5 minutes or more for the catalyst 10 to descend from the contact with the 1 st cleaning liquid 31 to the immersion of the entire catalyst 10 in the 1 st cleaning liquid 31. Since the catalyst 10 is gradually lowered to the 1 st cleaning liquid 31, the 1 st cleaning liquid 31 gradually enters from the opening surface of the lower portion of the catalyst 10 in a state where the opening surface of the upper portion of the catalyst 10 is not blocked until the entire catalyst 10 is immersed. The 1 st cleaning liquid 31 that has entered the opening surface compresses air that exists between the ash clogging the small compartment 11 relating to the opening surface and the 1 st cleaning liquid 31 that has entered the opening surface, and the pressure of the air increases. On the other hand, the open surface of the upper portion of the catalyst 10 is not blocked until the entire catalyst 10 is immersed, and therefore the air above the open surface is not compressed by the 1 st cleaning liquid 31 and is the same as the air pressure.

That is, in 5 minutes from the contact between the catalyst 10 and the 1 st cleaning liquid 31 to the immersion of the entire catalyst 10 in the 1 st cleaning liquid 31, the ash air that has penetrated into the catalyst 10 is continuously separated from the open surface of the upper portion of the catalyst 10 by the difference in pressure between the air generated in the lower portion and the air generated in the upper portion of the open surface. Thus, clogging by ash of the catalyst 10 is removed.

The user of the catalyst cleaning device 100 leaves the catalyst 10 in the immersed state at step S7 for, for example, 1 hour, and leaves the catalyst 10 in the immersed state in the 1 st cleaning liquid 31 (step S8).

The user of the catalyst cleaning device 100 inputs the intention of lifting the wire to the input receiving unit 120. That is, the input receiving unit 120 receives an input from the user of the catalyst washing device 100 to the effect that the catalyst washing device 100 lifts the catalyst 10 (step S9).

In step S9, the control unit 110 receives the signal output from the input receiving unit 120 and controls the supporting device 40 to raise the wire rope to the maximum height. That is, the catalyst 10 is lifted by the supporting device 40 and moved to the upper side of the 1 st cleaning tank 21 (step S10). In step S10, the catalyst 10 is not immersed in the 1 st cleaning liquid 31.

The user of the catalyst cleaning device 100 sets the catalyst 10 in a raised state in step S10 (step S11). In step S11, the first cleaning liquid 31 of the catalyst 10 can be cleaned.

The user of the catalyst cleaning device 100 inputs to the input receiving unit 120 to move the elevator of the support device 40 to a position corresponding to the rail 41 of the 2 nd cleaning tank 22. That is, the input receiving unit 120 receives an input from the user of the catalyst cleaning device 100 to the effect that the support device 40 moves the catalyst 10 to the upper side of the 2 nd cleaning tank 22 (step S12).

In step S12, the control unit 110 receives the signal output from the input receiving unit 120, and controls the supporting device 40 so that the elevator moves to a position corresponding to the track 41 of the 2 nd cleaning tank 22. In this case, the control device 50 stores the position of the rail 41 corresponding to the 2 nd cleaning tank 22 in advance. Under the control of the control unit 110, the supporting device 40 moves the catalyst 10 to the upper side of the 2 nd cleaning tank 22 (step S13).

The user of the catalyst cleaning device 100 inputs the input accepting unit 120 to pay out the wire into the 2 nd cleaning tank 22. That is, the input accepting unit 120 accepts an input from the user of the catalyst washing device 100 to lower the catalyst 10 to the 2 nd washing tank 22 (step S14).

The control unit 110 receives the signal output from the input receiving unit 120 in step S14, and performs control such that the supporting device 40 lowers the wire into the 2 nd cleaning tank 22, and the catalyst 10 fixed to the wire is immersed in the 2 nd cleaning solution 32 in the 2 nd cleaning tank 22 (step S15).

In the case of step S15, for example, in the control device 50, the speed of lowering the wire rope is stored so that it takes 5 minutes from the contact between the catalyst 10 fixed to the wire rope and the 2 nd cleaning solution 32 in the 2 nd cleaning tank 22 to the immersion of the entire catalyst 10 in the 2 nd cleaning solution 32. In step S14, the control unit 110 receives the signal output by the input receiving unit 120, and controls the rope to be paid out at the speed based on the speed of paying out the rope stored in the control device 50.

For example, in the case of step S15, the speed of lowering the wire rope may be stored in the control device 50 so that it takes 5 minutes or more to 2 hours or less from the time when the catalyst 10 fixed to the wire rope contacts the 2 nd cleaning solution 32 of the 2 nd cleaning tank 22 to the time when the entire catalyst 10 is immersed in the 2 nd cleaning solution 32. That is, the speed of the lowering of the wire rope for a specific time within 5 minutes to 2 hours may be stored in the control device 50. In step S15, the catalyst 10 is continuously lowered toward the 2 nd cleaning liquid 32.

If the input receiving unit 120 is an operation lever, the user of the catalyst cleaning device 100 manually performs the above-described steps S14 and S15.

In step S15, it takes 5 minutes for the catalyst 10 to descend from the contact with the 2 nd cleaning liquid 32 until the entire catalyst 10 is immersed in the 2 nd cleaning liquid 32. Since the catalyst 10 slowly descends to the 2 nd cleaning liquid 32, the 2 nd cleaning liquid 32 invades into the catalyst 10.

The user of the catalyst cleaning device 100 maintains the catalyst 10 immersed in the 2 nd cleaning liquid 32 by leaving the catalyst 10 immersed in the state of the catalyst 15 (step S16). In step S16, the 1 st cleaning liquid 31 adhering to the catalyst 10 is removed and reduced.

The user of the catalyst cleaning device 100 inputs an input to the input receiving unit 120 to raise the wire of the support device 40. That is, the input receiving unit 120 of the catalyst cleaning device 100 receives an input from the user of the catalyst cleaning device 100 to the effect that the support device 40 raises the catalyst 10 (step S17).

In step S17, the control unit 110 receives the signal output from the input receiving unit 120, and controls the supporting device 40 to lift the wire (step S18). That is, in step S18, the control unit 110 causes the support device 40 to lift the catalyst 10 and move it to the upper side of the 2 nd cleaning tank 22.

The user of the catalyst washing device 100 sets the catalyst 10 in a raised state in step S18 (step S19). In step S19, the catalyst 10 can be cleaned of the 2 nd cleaning liquid 32.

The user of the catalyst cleaning device 100 inputs the movement of the input receiving unit 120 to the position of the rail 41 corresponding to the position of the liquid removal table 60 of the hoist of the support device 40 and the lowering of the wire. That is, the input receiving unit 120 of the catalyst washing device 100 receives an input from the user of the catalyst washing device 100 to move the catalyst 10 above the liquid removal table 60 and to lower the catalyst to the liquid removal table 60 (step S20).

In step S20, the control unit 110 receives a signal indicating that the catalyst 10 has moved to the liquid removal table 60 from the input receiving unit 120, and controls the support device 40 to move to the position of the rail 41 corresponding to the position of the liquid removal table 60 of the hoist, thereby lowering the wire. In this case, the control device 50 stores the position of the rail 41 corresponding to the position of the liquid removal table 60. The supporting device 40 is moved to the position of the rail 41 corresponding to the positions of the hoist and the liquid removal table 60 by the control of the control unit 110, and then the wire rope is paid out. Thereby, the catalyst 10 is moved to the liquid removal table 60 (step S21).

The user of the catalyst cleaning device 100 places the catalyst 10 moved to the liquid removal table 60 in step S21 (step S22). By the setting in step S22, the first cleaning liquid 31 and the second cleaning liquid 32 attached to the catalyst 10 are removed.

The user of the catalyst cleaning device 100 dries the catalyst 10 by blowing hot air to the catalyst 10 by using the hot air blower 70 (step S23). In step S23, the liquids of the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 attached to the catalyst 10 evaporate.

The user of the catalyst cleaning device 100 checks the number of blockages on both open surfaces of the catalyst 10 (step S24). The check in step S24 confirms the status of ash removal in the catalyst 10. When the number of clogging is equal to or more than the predetermined number in step S24, the user of the catalyst cleaning device 100 can remove ash more favorably by immersing the catalyst 10 in the 1 st cleaning liquid 31, the 2 nd cleaning liquid 32, and the like.

Through the above-described steps, the user of the catalyst cleaning device 100 can remove the ash fixed to the catalyst 10.

action/Effect

The catalyst cleaning method comprises the following steps: supporting the catalyst 10 having a honeycomb structure above the cleaning liquid such that an opening surface of the catalyst 10 is opposed to a liquid surface of the cleaning liquid; and lowering catalyst 10 downward to immerse catalyst 10 in the cleaning solution, wherein in the immersing step, the time from contact between catalyst 10 and the cleaning solution to immersion of the entire catalyst 10 in the cleaning solution is 5 minutes or longer.

In the above catalyst cleaning method, the catalyst 10 is slowly lowered to the cleaning liquid, and therefore the cleaning liquid gradually permeates from the opening surface of the lower portion of the catalyst 10 in a state where the opening surface of the upper portion of the catalyst 10 is not blocked. This causes the ash air that has penetrated into the catalyst 10 to escape from the upper opening surface of the catalyst 10. Thus, the user using the catalyst cleaning method can easily remove the ash fixed to the catalyst 10.

In the catalyst washing method according to the present disclosure, in the step of immersing, the catalyst 10 is continuously lowered from the time the catalyst 10 is brought into contact with the washing liquid to the time the entire catalyst 10 is immersed in the washing liquid.

Thus, since the catalyst 10 is slowly lowered to the cleaning liquid, the cleaning liquid gradually permeates from the lower opening surface of the catalyst 10 in a state where the upper opening surface of the catalyst 10 is not clogged. This causes the ash air that has penetrated into the catalyst 10 to escape from the upper opening surface of the catalyst 10. Thus, the user using the catalyst cleaning method can easily remove the ash fixed to the catalyst 10.

< embodiment 2 >

The catalyst cleaning device 100 according to embodiment 2 is similar to the catalyst cleaning device 100 according to embodiment 1 in that ash adhering to the catalyst 10 is easily removed. The catalyst cleaning device 100 according to embodiment 1 is used in a manner in which the catalyst 10 is continuously lowered to the cleaning liquid, but the catalyst cleaning device 100 according to embodiment 2 is used in a manner in which the catalyst 10 is lowered to the cleaning liquid in stages.

The configuration of the catalyst cleaning device 100 according to embodiment 2 is the same as that of the catalyst cleaning device 100 according to embodiment 1.

Fig. 5 is a flowchart showing an example of a usage mode of the catalyst cleaning device 100 according to embodiment 2.

In use of the catalyst cleaning device 100 according to embodiment 2, the same processing as steps S1 to S5 as an example of the mode of use of the catalyst cleaning device 100 according to embodiment 1 is performed.

The user of the catalyst cleaning device 100 inputs the input to the input receiving unit 120 to put the wire of the support device 40 down. That is, the input receiving unit 120 of the catalyst washing device 100 receives an input from the user of the catalyst washing device 100 to the effect that the support device 40 lowers the catalyst 10 into the 1 st washing tank 21 (step S31).

In step S31, the control unit 110 receives the signal output from the input receiving unit 120, and controls the supporting device 40 to lower the wire rope into the first washing tub 21. That is, the supporting device 40 lowers the wire rope into the 1 st washing tub 21 under the control of the control unit 110. Thereby, a part of the catalyst 10 is immersed in the 1 st cleaning liquid 31 (step S32). For example, when the height of the catalyst 10 is 670mm, 67mm, which is 10% of the height, is immersed in the 1 st cleaning liquid 31.

For example, the control unit 110 controls the supporting device 40 so that the lower portion of the catalyst 10 is immersed in the 1 st cleaning liquid 31 by 67mm in height in step S32 based on the information such as the height of the upper surface of the 1 st cleaning liquid 31 stored in the control device 50.

The user of catalyst washing device 100 places catalyst 10 partially impregnated at step S32 in the state of impregnation at step S32 (step S33). That is, a part of the catalyst 10 is stopped in a state of protruding from the 1 st cleaning liquid 31. By the leaving in step S33, the ash in the 1 st cleaning liquid 31 is removed from the catalyst 10 by the chemical reaction with the ash in the catalyst 10.

In step S32 and step S33, the 1 st cleaning liquid 31 enters from the opening surface of the lower portion of the catalyst 10 in a state where the opening surface of the upper portion of the catalyst 10 is not blocked. The 1 st cleaning liquid 31 that has entered the cleaning liquid compresses air existing between the ash present on the opening surface and the small compartment 11 closed by the opening surface and the 1 st cleaning liquid 31 that has entered the opening surface, and the pressure of the air increases. On the other hand, since the upper opening surface of the catalyst 10 is not blocked, the air above the opening surface is not compressed by the 1 st cleaning liquid 31, and is the same as the air pressure.

That is, the ash air that has penetrated into the catalyst 10 is separated from the open surface of the upper portion of the catalyst 10 by the difference in air pressure between the lower portion and the upper portion of the open surface. Thus, clogging by ash of the catalyst 10 is removed.

The user of the catalyst cleaning device 100 repeats the steps from step S31 to step S33. For example, the catalyst 10 is left to stand for 5 minutes in a state where 30% of the lower portion thereof is immersed in the 1 st washing liquid 31.

Then, the catalyst 10 was left to stand for 5 minutes in a state where 50% of the lower portion thereof was immersed in the 1 st washing liquid 31.

Then, the catalyst 10 was left to stand for 5 minutes in a state where 70% of the lower portion thereof was immersed in the 1 st washing liquid 31.

Then, the catalyst 10 is left to stand for 5 minutes in a state where 90% of the catalyst is immersed in the 1 st washing liquid 31.

Then, the catalyst 10 is left standing for 1 hour in a state of being entirely immersed in the 1 st cleaning liquid 31.

For example, in the above-described repetition, the control unit 110 controls the supporting device 40 so that the lower portion of the catalyst 10 is immersed in 30%, 50%, 70%, 90%, 100% of the first cleaning liquid 31 based on the information such as the height of the upper surface of the first cleaning liquid 31 stored in the control device 50. The ratio of the lower part of the impregnated catalyst 10 may be different. For example, it may be 20%, 40%, 60%, 80%, 100%.

Thus, since a part of the catalyst 10 is immersed in the 1 st cleaning liquid 31 in a state where the upper part of the catalyst 10 is not clogged, air is released from the upper part of the catalyst 10, and clogging of the catalyst 10 due to ash is removed.

After the above steps, steps S13 and S14 are performed in the same manner as in the example of the usage of the catalyst cleaning device 100 according to embodiment 1.

After steps S13 and S14, the user of the catalyst cleaning apparatus 100 repeats the above steps S31 to S33 for the 2 nd cleaning liquid 32. Step S34 is the same as step S31, step S35 is the same as step S32, and step S36 is the same as step S33.

The user of the catalyst cleaning device 100 repeats the steps from step S34 to step S36. For example, the catalyst 10 is left to stand for 5 minutes in a state where 10% of the catalyst is immersed in the 2 nd washing liquid 32 from the bottom.

Then, the catalyst 10 is left to stand for 5 minutes in a state where 30% of the catalyst is immersed in the 2 nd washing liquid 32.

Then, the catalyst 10 is left to stand for 5 minutes in a state where 50% of the lower portion thereof is immersed in the 2 nd washing liquid 32.

Then, the catalyst 10 is left to stand for 5 minutes in a state where 70% of the catalyst is immersed in the 2 nd washing liquid 32.

Then, the catalyst 10 is left to stand for 5 minutes in a state where 90% of the catalyst is immersed in the 2 nd washing liquid 32.

Then, the catalyst 10 is left to stand for 30 minutes in a state of being entirely immersed in the 2 nd cleaning liquid 32.

Through the above steps, the 1 st cleaning liquid 31 adhering to the catalyst 10 is removed and reduced.

After the repetition of the above-described steps S34 to S36, steps S20 to S24, which are examples of the usage of the catalyst cleaning device 100 according to embodiment 1, are performed.

Through the above steps, the user of the catalyst cleaning device 100 can remove the ash fixed to the catalyst 10.

action/Effect

The catalyst cleaning method related by the disclosure comprises the following steps: supporting catalyst 10 having a honeycomb structure above the cleaning liquid such that an opening surface of catalyst 10 is opposed to a liquid surface of the cleaning liquid; and lowering the catalyst 10 downward to be impregnated into the cleaning liquid, comprising: making a part of the catalyst 10 stand still in a state of protruding from the cleaning liquid; and immersing the entire catalyst 10 in the cleaning solution after the catalyst is allowed to stand still.

Thus, a part of catalyst 10 immersed in the cleaning liquid gradually permeates from the opening surface of the lower part of catalyst 10 in a state where the opening surface of the upper part of catalyst 10 is not blocked. This causes ash air that has penetrated into a part of the impregnated catalyst 10 to escape from the upper opening surface of the catalyst 10. Thus, the clogging caused by the ash of a part of the impregnated catalyst 10 is removed.

< other embodiment >

While one embodiment has been described in detail with reference to the drawings, the specific configuration is not limited to the above, and various design changes and the like can be made.

In the above-described embodiment, the user of the catalyst cleaning device 100 inputs the input to the catalyst cleaning device 100, and the input receiving unit 120 receives the input and moves the catalyst 10 in the support device 40. In contrast, in another embodiment, the storage unit 130 is provided in the catalyst cleaning device 100, and the support device 40 operates based on the procedure stored in the storage unit 130. Fig. 6 is a schematic block diagram showing the configuration of a control device 50 according to another embodiment.

Specifically, the control unit 110 controls the support device 40 that supports the catalyst 10 having the honeycomb structure and moves the catalyst 10 in the vertical direction and the horizontal direction based on the steps stored in the storage unit 130.

That is, the control unit 110 controls the supporting device 40 so that the catalyst 10 is impregnated into the cleaning liquid based on the procedure stored in the storage unit 130. The impregnation may be performed continuously as in embodiment 1, or may be performed partially in stages as in embodiment 2.

The procedure is the operation information of the support device 40 recorded in time series.

Examples of the storage unit 130 include a hard disk.

In the support device 40 of the catalyst cleaning device 100 according to another embodiment, the catalyst 10 is immersed in the cleaning liquid based on the procedure stored in the storage unit 130.

With the other embodiments described above, the user of the catalyst cleaning device 100 can immerse the catalyst 10 in the cleaning liquid without inputting to the catalyst cleaning device 100. Thus, the user of the catalyst cleaning device 100 can remove the ash of the catalyst 10 more easily.

In the above embodiment, the user of the catalyst cleaning device 100 can adjust the time for immersion by observing bubbles generated from the catalyst 10 immersed in the 1 st cleaning liquid 31 or the 2 nd cleaning liquid 32. For example, the time for immersion may be extended until the bubbles are generated.

< computer Structure >

Fig. 7 is a schematic block diagram showing a configuration of a computer 1100 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 catalyst cleaning device 100 is installed in a computer 1100. The operations of the processing units described above are stored in the memory 1130 as programs. The processor 1110 reads a program from the memory 1130, expands the program in the main memory 1120, and executes the above-described processing in accordance with the program. The processor 1110 also secures a storage area corresponding to each storage unit described above in the main memory 1120 in accordance with the program.

The program may be a program for realizing a part of the functions of the computer 1100. For example, the program may be a program that functions by being combined with another program already stored in the memory 1130 or with another program installed in 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 instead of the above-described configuration. Examples of PLDs include PAL (Programmable Array Logic), GAL (general Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, part or all of the functions implemented by the processor 1110 may be implemented by the integrated circuit.

Examples of the memory 1130 include a magnetic disk, an optical magnetic disk, a semiconductor memory, and the like. The memory 1130 may be an internal medium directly connected to a bus of the computer 1100, or may be an external medium connected to the computer via the interface 1140 or a communication line. In addition, when the program is distributed to the computer 1100 through the communication line, the computer 1100 that has received the distribution can expand the program in the main memory 1120 and execute the above-described processing. In at least 1 embodiment, the memory 1130 is a non-transitory tangible storage medium.

Further, the program may be a program that realizes a part of the aforementioned functions. Further, the program may be a program that realizes the above-described functions by combining with another program already stored in the memory 1130, that is, a so-called differential file (differential program).

< notes in the attached paragraphs >

The catalyst cleaning device 100 according to each embodiment is grasped as follows, for example.

(1) The catalyst cleaning method comprises the following steps: supporting catalyst 10 having a honeycomb structure above the cleaning liquid such that an opening surface of catalyst 10 is opposed to a liquid surface of the cleaning liquid; and dipping the catalyst 10 downward into the cleaning

liquids

31, 32, wherein in the dipping step, the time from the contact of the catalyst 10 with the cleaning

liquids

31, 32 until the entire catalyst 10 is dipped in the

cleaning liquids

31, 32 is 5 minutes or more.

Thus, since the catalyst 10 slowly descends to the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32, the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 gradually penetrate from the opening surface of the lower portion of the catalyst 10 in a state where the opening surface of the upper portion of the catalyst 10 is not blocked. This causes the ash air that has entered the catalyst 10 to continuously escape from the upper opening surface of the catalyst 10. Thus, the user using the catalyst cleaning method can remove the ash fixed to the catalyst 10.

(2) In the catalyst cleaning method, in the step of immersing, the catalyst 10 is continuously lowered from the time when the entire catalyst 10 and the cleaning

liquids

31 and 32 are immersed in the

cleaning liquids

31 and 32.

Thus, since the catalyst 10 slowly descends to the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32, the cleaning

liquids

31 and 32 gradually permeate from the opening surface of the lower portion of the catalyst 10 in a state where the opening surface of the upper portion of the catalyst 10 is not blocked. This causes the ash air that has entered the catalyst 10 to continuously escape from the upper opening surface of the catalyst 10. Thus, the user using the catalyst cleaning method can remove the ash fixed to the catalyst 10.

(3) The catalyst cleaning method comprises the following steps: supporting the honeycomb catalyst 10 above the cleaning

liquids

31 and 32 so that the open surface of the catalyst 10 faces the liquid surface of the cleaning liquid; and lowering the catalyst 10 downward to be immersed in the

cleaning liquids

31 and 32, comprising the steps of: the catalyst 10 is stopped in a state where a part thereof protrudes from the cleaning

liquids

31 and 32; after standing still, the entire catalyst 10 is immersed in the

cleaning liquids

31 and 32.

Thus, the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 gradually penetrate from the lower opening surface of the catalyst 10 in a state where a part of the catalyst 10 impregnated in the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 is not blocked at the upper opening surface of the catalyst 10. As a result, the ash air that has penetrated into a part of the impregnated catalyst 10 is continuously removed from the upper opening surface of the catalyst 10. Thus, clogging by ash of a part of the impregnated catalyst 10 is removed.

(4) The catalyst cleaning device 100 includes: a support device 40 for moving the catalyst 10 in the vertical direction while supporting the catalyst 10 having a honeycomb structure; and a control device 50 that controls the support device 40, wherein the control unit 110 controls the support device 40 such that the time from when the catalyst 10 comes into contact with the cleaning

liquids

31 and 32 until the entire catalyst 10 is immersed in the

cleaning liquids

31 and 32 is 5 minutes or longer.

Thus, since the catalyst 10 slowly descends to the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32, the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 gradually penetrate from the opening surface of the lower portion of the catalyst 10 in a state where the opening surface of the upper portion of the catalyst 10 is not blocked. This causes the ash air that has penetrated into the catalyst 10 to continuously escape from the upper opening surface of the catalyst 10. Thus, the user of the catalyst washing device 100 can remove the ash fixed to the catalyst 10.

(5) A program for causing a control device 50 of a support device 40 that supports a catalyst 10 having a honeycomb structure and moves the catalyst 10 in the vertical direction to execute the steps of: the catalyst 10 is lowered downward and immersed in the

cleaning liquids

31 and 32, and in the step of immersing, the time from the contact of the catalyst 10 with the cleaning

liquids

31 and 32 until the entire catalyst 10 is immersed in the

cleaning liquids

31 and 32 is 5 minutes or longer.

Thus, since the catalyst 10 slowly descends to the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32, the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 gradually permeate from the lower opening surface of the catalyst 10 in a state where the upper opening surface of the catalyst 10 is not blocked. This causes the ash air that has penetrated into the catalyst 10 to continuously escape from the upper opening surface of the catalyst 10. Thus, the user executing the program can remove the ash stuck to the catalyst 10.

(6) The catalyst cleaning device 100 includes: a support device 40 for moving the catalyst 10 in the vertical direction while supporting the catalyst 10 having a honeycomb structure; and a control device 50 for controlling the support device 40, wherein the control unit 110 controls the catalyst 10 to be partially stationary in a state of protruding from the cleaning

liquids

31 and 32, and after the catalyst is stationary, the entire catalyst 10 is immersed in the

cleaning liquids

31 and 32.

(7) A program for causing a control device 50 of a support device 40 that supports a catalyst 10 having a honeycomb structure and moves the catalyst 10 in the vertical direction to execute: the catalyst 10 is lowered downward and immersed in the

cleaning liquids

31 and 32, and the following steps are performed: the catalyst 10 is made to stand in a state where a part thereof protrudes from the cleaning

liquids

31 and 32; and immersing the entire catalyst 10 in the

cleaning liquids

31 and 32 after the catalyst is stationary.

Thus, in a state where the opening surface of the upper portion of the catalyst 10 is not closed, a part of the catalyst 10 immersed in the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 gradually penetrates the 1 st cleaning liquid 31 and the 2 nd cleaning liquid 32 from the opening surface of the lower portion of the catalyst 10. This causes ash air that has penetrated into a part of the impregnated catalyst 10 to continuously escape from the upper opening surface of the catalyst 10. Thus, the clogging caused by the ash of a part of the impregnated catalyst 10 is removed.

Examples

Cleaning solution

Ammonium Hydrogen fluoride (NH) having a Hydrogen fluoride fraction of 1.75% by mass₄HF₂) As fluorine compounds, water or sulfamic acid (H)₃NSO₃) A commercially available nonionic surfactant containing polyoxyethylene polyoxypropylene glycol as a main component in an amount of 0.05% by mass as an inorganic acid in an amount of 3.2% by mass, and a liquid medicine prepared by mixing the above components in the above proportions was used as the first cleaning solution 31. As the cleaning solution 2, a cleaning solution prepared to have 1mol/l of sulfamic acid was used.

Measurement of clogging Rate

The used denitration catalyst was taken out from the actual equipment, and the clogging rate of the taken-out denitration catalyst was measured by counting the number of the clogged gas vents (cells) visually. For calculation of the clogging rate, an expression of (number of clogged cells/number of all cells) × 100 is used. As the denitration catalyst, a honeycomb-shaped denitration catalyst (honeycomb denitration catalyst) having 5mm square gas holes (honeycomb holes) and a size of 150mm × 150mm × 670mm was used.

As an example of the method of embodiment 2, steps S31 to S33 of immersing the first cleaning liquid 31 in 10%, 30%, 50%, 70%, 90% and 100% of the catalyst length at the lower part of 670mm for 5 minutes are performed 1 time each. Next, a partial immersion step 34 to 36 of the catalyst 10 with the 2 nd cleaning liquid 32 is performed 1 time at each position. The remaining rate of clogging of the denitration catalyst after the treatment was measured in the same manner as described above.

Fig. 8 is a graph showing the result of the remaining rate of clogging. When the remaining rate of clogging before the treatment according to the above-described example is 1, the remaining rate of clogging after the treatment according to the above-described example is 0.57.

Industrial applicability

The invention relates to a catalyst cleaning method, a catalyst cleaning device, and a program.

According to the present invention, ash fixed to the catalyst can be easily removed.

Description of the reference numerals

10 catalyst

11 Small compartment

21 st cleaning tank

22 nd 2 cleaning tank

31 st cleaning liquid

32 nd 2 nd cleaning liquid

40 support device

41 track

50 control device

60 liquid removing table

70 hot air blower

100 catalyst cleaning device

110 control part

120 input receiving unit

130 storage part

1100 computer

1110 processor

1120 Main memory

1130 memory

1140 interface

Claims

1. A catalyst cleaning method is characterized by comprising the following steps:

supporting a catalyst having a honeycomb structure above a cleaning liquid so that an opening surface of the catalyst faces a liquid surface of the cleaning liquid; and

the catalyst is lowered downward to be impregnated into the cleaning liquid,

in the immersing step, a time from contact of the catalyst with the cleaning liquid until immersion of the entire catalyst in the cleaning liquid is 5 minutes or more.

2. The catalyst cleaning method as recited in claim 1,

in the step of immersing, the catalyst is continuously lowered from the time when the catalyst is brought into contact with the cleaning liquid until the entire catalyst is immersed in the cleaning liquid.

3. A catalyst cleaning method is characterized by comprising the following steps:

the catalyst is lowered downward to be impregnated into the cleaning liquid,

comprises the following steps:

making the catalyst stand still in a state where a part of the catalyst protrudes from the cleaning liquid;

after standing still, the entire catalyst is immersed in the cleaning solution.

4. A catalyst cleaning device is characterized by comprising:

a support device for supporting a catalyst having a honeycomb structure and moving the catalyst in a vertical direction; and

a control device that controls the support device,

the control device controls the support device so that a time from contact between the catalyst and the cleaning liquid until immersion of the entire catalyst in the cleaning liquid is 5 minutes or longer.

5. A program characterized by causing a control device of a support device that moves a catalyst of a honeycomb structure in the vertical direction while supporting the catalyst to execute:

the catalyst is lowered downward to be impregnated into the cleaning liquid,

6. A catalyst cleaning device is provided with:

a support device that moves a catalyst of a honeycomb structure in the vertical direction while supporting the catalyst;

a control device that controls the support device,

the control device controls the catalyst to be partially stationary in a state of protruding from the cleaning liquid, and after the catalyst is stationary, the entire catalyst is immersed in the cleaning liquid.

7. A program characterized in that a control device of a support device that supports a catalyst having a honeycomb structure and moves the catalyst in a vertical direction is caused to execute:

the catalyst is lowered downward to be impregnated into the cleaning liquid,

the following steps are carried out:

making the catalyst stand still in a state where a part of the catalyst protrudes from the cleaning liquid; and

After the catalyst is stopped, the entire catalyst is immersed in the cleaning solution.