JPH0427419A - Device for taking out catalyst for inspection of performance of stack gas denitrizer - Google Patents

Abstract

PURPOSE:To carry out the inspection of the activity of a catalyst during the operation of a plant by providing a case-inserting part in a stack gas denitrizer and housing a sample catalyst case packed with the sample catalyst into case- inserting section. CONSTITUTION:In the case of pulling a handle 9 to right direction, the sample catalyst case 5 is turned in a clockwise direction along a stopper 12 serving also a grid rail while centering lower hing part 10 and stopped while inclining by necessary angle. At this time, when the internal pressure of the denitrizer is positive, air stop valve 17 is opened and sealing air is injected into a case- inserting part 4 from sealing air supplying pipe 16. Thereafter as shown by an arrow 18, the sample catalyst 6 is taken out to an upward direction from the sample catalyst case 5 and inspects the degree of lowering of the activity of the sample catalyst 5. By this inspection, the degree of lowering of the activity of catalyst 3 used in the stack gas denitrizer is easily estimated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a catalyst extraction device for flue gas denitrification equipment performance testing, and in particular, to a catalyst extraction device for exhaust gas denitrification equipment performance testing. This allows for inspection.

[Conventional technology]

The performance of the catalyst in a flue gas denitrification equipment decreases as the plant that generates flue gas operates, but conventionally, there was no way to remove the catalyst while the plant was operating, so the performance of the catalyst was inspected. Generally, this was limited to periodic plant inspections and during plant downtime.

In other words, in the past, there was no way to know the degree of deterioration in the performance of a catalyst while the plant was in operation, so the catalyst was inspected during periodic inspections. If the results show that it is possible, the catalyst can be used as is, but if it has deteriorated to the extent that it cannot be used until the next periodic inspection, then the catalyst is ordered from the catalyst manufacturer for the first time. I decided to replace it with a new one.

[Problem to be solved by the invention]

As mentioned above, conventionally, the catalyst of the flue gas denitrification equipment was inspected during regular plant inspections, and if it had deteriorated to the point that it could not be used until the next regular inspection, then the catalyst was inspected for the first time.
Since the catalyst is ordered from a catalyst manufacturer, the catalyst is very expensive and the catalyst manufacturer usually does not have it in stock, so it takes a long time from the time the order is placed to the delivery of a new product. Therefore, there was a problem in that the start of operation after the regular inspection of the plant had to be postponed.

The present invention aims to solve the above problems. That is, the present invention can perform a performance inspection of the catalyst of the exhaust gas denitrification equipment while the plant is operating, and predict whether or not it is necessary to replace the catalyst during the periodic inspection without waiting for the plant's periodic inspection. It is an object of the present invention to provide a catalyst extracting device for exhaust gas denitrification device performance testing that can perform the following steps.

[Means to solve the problem]

In order to achieve the above object, the catalyst removal device for flue gas denitrification equipment performance testing of the present invention is provided with a case insertion part inside the flue gas denitrification equipment, and a sample catalyst case filled with a sample catalyst is inserted into the case. It is assumed that the device is stored in a section where it can be taken in and taken out.

[Effect]

According to the present invention, the sample catalyst case filled with the sample catalyst is removably stored in the case insertion portion provided inside the exhaust gas denitrification equipment, so the plant is operated with the sample catalyst case stored. The sample catalyst is operated to perform the same catalytic action as the other catalysts.

Then, at an appropriate timing to be described later, the sample catalyst case is taken out from the case insertion portion, the sample catalyst is extracted, and the degree of deterioration in the performance of the sample catalyst is examined. Through this inspection, the degree of deterioration in the performance of the catalyst in the exhaust gas denitrification device is estimated.

Through this inspection, we can predict whether or not there is a need to replace the catalyst during periodic inspections, and if it is determined that it is necessary to replace the catalyst during periodic inspections, we will immediately order a catalyst from the catalyst manufacturer. Make sure you have enough time to replace the new one during periodic inspection. Therefore, it is possible to eliminate the waiting time for delivery of a new catalyst at the time of periodic inspection.

Note that the appropriate timing is a timing at which a decline in the performance of the catalyst can be predicted until the periodic inspection, and
This refers to timing when there is no time to wait for the delivery.

〔Example〕

The drawing shows an embodiment of the invention. Fig. 1 is a plan view showing a part of the inside of the exhaust gas denitrification device with the sample catalyst case stored in the case insertion part, and Fig. 2 is a plan view showing the state when the sample catalyst is removed. FIG. 3 is a front view showing a part of FIG. 1, and FIG. 4 is a front view showing the inside of the case insertion portion of FIG. 2 and its vicinity.

In the drawing, 1 is the outer surface of the denitrification device, 2 is the catalyst basket, 3 is the catalyst, 4 is the case insertion part provided inside the denitrification device, 5 is the sample catalyst case, and 6 is the sample catalyst filled in the case 5. , 7 is a cover paver, 8 is a door forming a part of the case 5, 9 is a handle provided on the door 8, and 10 is a hinge for pivotally connecting the lower part of the case 5 and the lower part of the case insertion part 4. 11 is a bolt that removably screws the upper part of the case 5 and the upper part of the case insertion part 4 together, and 12 is a hinge part provided on the upper part of the case insertion part 4 when the case 5 is inserted or removed. a guide rail/stopper having an arcuate groove for guiding and stopping the rotation of the case 5;
13 is an arrow indicating the gas flow direction; 14 is a damper provided on the upstream side of the gas flow of the case insertion portion 4; 15 is a damper provided on the downstream side of the gas flow of the case insertion portion 4;
16 is a seal air supply pipe to the case insertion portion 4; 17 is an air cutoff valve provided in the seal air supply pipe 16; 18
is an arrow indicating the direction in which the sample catalyst 6 is taken out.

In the catalyst removal device for flue gas denitrification equipment performance testing configured as shown in the figure, first, as shown in Figs. 1 and 3, the sample catalyst case 5 filled with the sample catalyst 6 is placed inside the denitrification equipment. It is stored in the provided case insertion part 4, and the dampers 14 and 15 are fully opened to operate the plant.

Then, part of the exhaust gas flowing inside the denitrification device passes through the sample catalyst 6, so that the sample catalyst 6 also has the same catalytic effect as the other catalysts 3. Note that the sample catalyst case 5 does not have a door. 8, the exhaust gas passing through the sample catalyst 6 will not leak outside.

Then, at the appropriate timing mentioned in the section of the above-mentioned operation, as shown in FIGS. 2 and 4, the sample catalyst case 5 is
from the case insertion part 4, and insert the sample catalyst 6 in the direction of arrow 1.
The sample catalyst 6 is sampled in the direction of 8 and the degree of deterioration in performance of the sample catalyst 6 is examined.

That is, when removing the sample catalyst 6, as shown in FIGS. 2 and 4, the dampers 14 and 15 are fully closed to block the exhaust gas from flowing into the case insertion portion 4. Then, remove the bolt 11 shown in Figure 1, and
In the figure, when the handle 9 is pulled to the right, the sample catalyst case 5
rotates clockwise around the lower hinge part 10 along the guide rail/stopper 12, tilts at a required angle, and then stops. At this time, if the pressure inside the denitrification device is positive, the air cutoff valve 17 is opened and seal air is injected into the case insertion portion 4 from the seal air supply pipe 16.

After that, the sample catalyst 6 is pulled out upward from the sample catalyst case 5 as shown by the arrow 18, and the sample catalyst 6 is removed from the sample catalyst case 5.
Inspect the degree of performance deterioration. With this test,
The degree of deterioration in the performance of the catalyst 3 in the exhaust gas denitrification device is estimated.

Through this inspection, we can predict whether or not it is necessary to replace the catalyst 3 at the regular inspection, and if it is determined that the catalyst 3 needs to be replaced at the regular inspection, we will immediately order the catalyst from the catalyst manufacturer. and ensure that there is enough time to replace the new one during periodic inspections. Therefore, it is possible to eliminate the waiting time for delivery of a new catalyst at the time of periodic inspection.

In addition, in the illustrated catalyst removal device for exhaust gas denitrification equipment performance testing, the case insertion portion 4 is provided inside the denitrification equipment,
In addition, since the sample catalyst case 5 is pivoted at the lower part and is prevented from tilting more than necessary by the guide rail and stopper 12 at the upper part, there is a space for installing the sample catalyst case 5 and a space for extracting the sample catalyst 6. The space for the sample catalyst case 5 is kept to a minimum, and since the sample holder g6 is removed upward from the sample catalyst case 5, the removal operation is facilitated.

〔Effect of the invention〕

As explained above, according to the present invention, the sample catalyst case filled with the sample catalyst is removably housed in the case insertion part provided inside the exhaust gas denitrification device. The plant can be operated in a stored state, and the sample catalyst can be caused to have the same catalytic effect as other catalysts. Then, at an appropriate timing without stopping plant operation, the sample catalyst case is taken out from the case insertion part, the sample catalyst is extracted, the degree of deterioration in the performance of the sample catalyst is inspected, and the Through inspection, it is possible to estimate the degree of deterioration in the performance of the catalyst in the exhaust gas denitrification device.

Through this inspection, it is possible to predict whether or not the catalyst needs to be replaced during periodic inspections.If it is determined that the catalyst needs to be replaced during periodic inspections, immediately contact the catalyst manufacturer to have the catalyst replaced. This makes it possible to place an order and have it delivered in sufficient time to replace a new catalyst during a periodic inspection, thereby eliminating the waiting time for the delivery of a new catalyst during a periodic inspection. This eliminates the problem of having to postpone the start of plant operation.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a plan view showing the inside of the flue gas denitrification device in which the sample catalyst case is housed, and Fig. 2 is a plan view showing the inside of the exhaust gas denitrification device when the sample catalyst case is removed. 3 is a front view showing a part of FIG. 1, and FIG. 4 is a front view showing the inside of FIG. 2. 1... External surface of denitrification equipment, 2... Catalyst basket, 3
...Catalyst, 4...Case insertion part, 5...Sample catalyst case, 6...Sample catalyst, 7...Kaol vapor, 8...Door, 9...Handle, 10... Hinge part, 11... Bolt, 12... Guide rail and stopper, 13... Arrow, 14.15... Damper, 16
... Seal air supply pipe, 17 ... Air cutoff valve, 18
...Arrow.

Claims (1)

[Claims] 1. A case insertion part is provided inside the exhaust gas denitrification device, and
A flue gas denitrification device performance test, characterized in that a sample catalyst case filled with a sample catalyst is removably stored in the case insertion part, and a part of the exhaust gas can also flow through the sample catalyst. Catalyst removal device. 2. The lower part of the case insertion part and the lower part of the sample catalyst case are pivotally connected, and a device is provided at the upper part of the case insertion part to guide and stop the rotation of the sample catalyst case when the sample catalyst case is taken in and out. 2. The catalyst removal device for performance testing of an exhaust gas deodorizing device according to claim 1, further comprising an arcuate guide rail and stopper. 3. The catalyst removal device for exhaust gas denitrification device performance testing according to claim 1 or 2, further comprising dampers provided on the upstream and downstream sides of the gas flow of the case insertion portion, respectively. 4. The catalyst removal device for exhaust gas denitrification device performance testing according to claim 1, 2 or 3, further comprising an air supply pipe for injecting sealing air into the case insertion portion from the outside. 5. The catalyst removal device for exhaust gas denitrification device performance testing according to claim 1, 2, 3, or 4, wherein the sample catalyst case also serves as a door of the case insertion portion. 6. The catalyst removal device for exhaust gas denitrification equipment performance testing according to claim 1, 2, 3, 4, or 5, wherein the sample catalyst is filled so as to be able to be extracted upward from the sample catalyst case.