JPS589619Y2 - Catalyst exchange device for catalyst installed in exhaust gas duct - Google Patents

Description

[Detailed description of the invention] This invention is a catalyst replacement for the catalyst installed in the flue gas duct, which is temporarily installed in the flue gas treatment equipment that reduces NOx etc. contained in the flue gas of steam boilers etc. by the action of a rigid region. Regarding equipment.

In order to prevent air pollution at facilities such as thermal power plants where steam boiler exhaust gas is diffused into the atmosphere, sulfur compounds, NOx, dust, odors, etc. contained in the exhaust gas are reduced to below standard values based on the Air Pollution Control Law, etc. It is mandatory to install processing equipment to

In order to reduce NOx (nitrogen oxides), etc., thermal power plants and the like are equipped with flue gas treatment equipment in which catalysts are installed in the flue gas duct in the form of filters to reduce NOx through the action of the catalyst.

That is, a catalyst assembly unit is formed by stacking catalyst cases containing catalysts in catalyst racks provided in the duct in multiple stages and multiple rows, and since the diameter of the smoke exhaust duct is very large, the installation area of the catalyst is, for example, 100 mm. The area is now more than 1 square meter in size, and there is a need to speed up the catalyst replacement process, ensure safety, and save labor.

Conventionally, when replacing the catalyst in the above-mentioned exhaust gas treatment equipment, a ■-shaped beam was erected above the catalyst replacement space in the duct into which the catalyst case was pulled out or pushed, and a suspended hoist was attached to the ■-shaped beam. A person enters the duct, pulls out the catalyst cases, hangs them on a hoist, and lowers the catalyst cases to the floor through the opening in the bottom wall of the duct, starting from the top and moving all the catalyst cases to the bottom. After taking it out, the catalyst case filled with new catalyst is hoisted up with a hoist and pushed into the catalyst rack from the bottom step to the top step, and then the button is pressed, which is extremely dangerous as it requires manual work at high places. This method also has the disadvantage that it takes a lot of time to replace the catalyst because the worker has to change the height of the scaffold according to when the catalyst case is being pulled out or pushed in.

Therefore, in this invention, when replacing the catalyst, this device is temporarily installed and the catalyst can be replaced semi-automatically. Therefore, unless the device is temporarily installed, the worker does not have to climb up to a high place inside the duct and directly perform the catalyst replacement work. The purpose is to provide a catalyst replacement device for the catalyst installed in the smoke exhaust duct, which can ensure work safety, speed up the work, and save labor. The accommodated catalyst cases are stacked in multiple stages and rows in a catalyst rack installed in the exhaust gas duct to form a catalyst assembly unit to remove NOx contained in exhaust smoke.
In the exhaust gas treatment equipment that reduces the amount of carbon dioxide and the like through the action of a catalyst, the duct space on one side of the catalyst assembly unit is used as a catalyst exchange space, and an opening of a required size that can be closed with a lid or the like is opened in the bottom wall of the duct space, and A pair of upper and lower running rails are horizontally suspended above and below the catalyst assembly unit, and a traversing mast device constituted by a mast and a traveling device is moved along the running rail and installed so as to be aligned with the opening; An elevating cage device equipped with a catalyst case drawer/pushing device is attached to the mast of the traversing mast device so as to be able to rise and fall, and when the opening and the traversing mast device coincide, there is a slight gap with the lower end of the mast of the traversing mast device. The fixed mast, which is made to match the fixed population, is removably erected.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a catalyst exchange device for a catalyst installed in an exhaust gas duct according to the present invention will be described below with reference to the drawings.

As shown in Fig. 1, a catalyst collection unit A is installed in the horizontal part of a smoke exhaust duct 1, which is installed so that exhaust smoke from a steam boiler flows from above to below and then horizontally. The exhaust gas treatment equipment is configured to reduce the amount of smoke using a catalyst.

The catalyst assembly unit A is constructed by stacking catalyst cases 4 each having an L-shaped handle 3 in multiple stages and rows on a catalyst rack 2 provided in a smoke exhaust duct 1.
As shown in the figure, it is formed into a rectangular parallelepiped shape with open front and rear ends, and a catalyst 5 shaped like a bunch of square pipes bundled inside is housed.

The duct space 6 on the upstream side of the catalyst assembly unit A is a catalyst exchange space from which the catalyst case 4 can be pulled out.
The duct bottom wall 7 defining the catalyst exchange space 6 may be located at a required location (one location in the illustration, but may be located at a plurality of locations).

) is provided with an opening 8 which is normally closed with a lid (not shown) or the like.

In the catalyst exchange space 6, an upper rail 9 is fixedly installed above the catalyst assembly unit A to protrude from the duct wall, and a lower rail 10 is fixedly installed below the catalyst assembly unit A to protrude from the duct wall. , upper rail 9 and lower rail 1
0 in the lateral direction (
A transverse mast device B that can travel in the left-right direction in FIG. 2 is attached.

In the traversing mast device B, when replacing the catalyst, the lid is opened and each component divided into multiple parts is inserted through the opening 8 to form a vertically long inverted U-shaped (i.e. gate-shaped) mast 11 and the upper end of the mast 11. The upper mast beam 12 is attached to the upper mast beam 12 and the lower mast beam 13 is attached to the lower end of the mast 11. A lower guide roller 15 provided at the tip of the lower mast beam 13 is guided by the lower rail 10, and further the lower mast beam 1
The driving roller 17 is assembled so as to rotate and travel on the lower rail 10 by driving a travel drive motor 16 attached to the lower rail 10.

An elevating cage device C, which can be freely raised and lowered using the mast 11 as a guide, is removably attached to the traversing mast device B by lowering it from the lower end of the mast 11.
1, guide rollers 19 attached above and below the left and right sides of the bear body 18 so that the bear body 18 is guided to the mast 11, and hoisting wire lobes 20 so that the bear body 18 can be raised and lowered. The end of the upper mast beam 12
It consists of a hoisting machine (elevating drive device) 22 that is tightly connected to a hanging pin 21 provided on the bear body 18 and installed above the bear body 18.

The bear body 18 is equipped with a catalyst case drawer/push-in device that can pull out the catalyst case 4 from inside the catalyst rack 2 and conversely push it into the catalyst rack 2.

The device includes a roller table 23 provided on the floor of the bear body 18, an elevating frame 24 that can be raised and lowered within the bear body 18, a grasping frame 25 that is attached to the elevating frame 24 and capable of moving forward and backward, and a grasping frame. 25 and a gripping rod 26 provided on the overhanging portion.

The roller table 23 is also a part of the bear body 18.

The elevating frame 24 includes an elevating guide rod 2T,
This is guided by a bearing 28 on the bear body 18 side and can be lowered (or raised) by expanding (or contracting) an elevating cylinder device 29 provided on the bear body 18.

The gripping frame 25 is guided by a pair of guide rods 30 provided from the lifting frame 24 on both sides that do not interfere with the catalyst case 4 when it is pulled out, and a threaded rod 31 rotatably supported at both ends by the lifting frame 24. The gripping frame 2
5, the forward rotation of the motor 35 causes the threaded rod 31 to rotate and move forward in the direction in which it comes into contact with the catalyst case 4, and the motor 3
You can go backwards by reversing 50 degrees.

The gripping rod 26 aligns the upper end of the roller chiffle 23 with the lower end of the catalyst case 4 to be pulled out, and the gripping frame 2
5 to the frontmost position and press the button to open the lifting cylinder device 2.
When extended to the maximum extent, 9 fits within the L-shaped handle 3 attached to the catalyst case 4.

In the opening 8, the upper end is slightly retracted so as not to interfere with the transverse mast device B, and an entrance fixed mast 36, which is a set of two masts at intervals corresponding to the masts 11 of the transverse mast device B, is removably installed on the floor 37. Therefore, when the mast 11 of the traversing mast device B and the entrance fixed mast 36 are aligned as shown in FIG. 2, the elevating tube device C can be lowered to the floor 3T.

Note that this device may be provided downstream of the catalyst assembly unit A.

To temporarily install the catalyst exchange device for the catalyst installed in the exhaust gas duct configured as described above, first, open the transverse mast device B from the opening 8.
Insert each structural member of the upper rail 9 and lower rail 1
Assemble the traversing mast device B so that it can traverse using 0 as a guide.

Next, with the elevating cylinder device C attached to the inlet fixed mast 36 in advance, the inlet fixed mast 36 is erected at a predetermined position below the opening 8, and the hoisting machine 22 provided in the elevating cylinder device C is installed.
Terminal of hoisting wire rope 21 all traversing mast device B
When the mast 11 and the entrance fixed mast 36 are aligned, they are connected to the hanging pin 21 provided on the upper mast beam 12, and the process is completed.

Therefore, the removal work can be performed in the opposite direction to the assembly work.

In this case, the smoke exhaust duct 1 can be installed without dismantling the traversing mast device B.
It may be stored in a corner of the

Next, the operation of the above-mentioned catalyst exchange device for the catalyst installed in the exhaust gas duct will be explained.

Open the catalyst case 4 stored in the catalyst rack 2 through the opening 8
When taking out up to the lower floor surface 37, first the hoisting machine 22
is driven to stop the elevating cylinder device C at a position facing the catalyst case 4 in the uppermost stage, and then the traveling drive motor 16 is driven 1 to move the traversing mast device B to a position facing the catalyst case 4 in the desired row. make it stop.

Next, with the lifting frame 24 of the catalyst case drawer/pushing device in the raised position and the gripping frame 25 in the retracted position, the motor 35 is rotated in the forward direction to move the gripping frame 25 to the most advanced position. After stopping at , the elevating cylinder device 29 is extended and driven to stop the elevating frame 24 at the lowest position.

Then, the gripping rod 26 is placed in the L position of the upper catalyst case 4 in the desired position.
Since it will fit inside the shaped handle 3, the motor 35 will be inserted again after a while.
When the grip frame 25 is reversed and the grip frame 25 is moved backward, the catalyst case 4 is pulled out onto the roller chiffle 23.

Next, the traveling 1 drive motor 16 is driven 1 to traverse the traversing mast device B so that it is aligned with the entrance fixed mast 36 again, and then the hoisting machine 22 is driven to lower the elevating cylinder device C to the floor 37. After that, when the elevating cylinder device 29 is reduced and the elevating frame 24 is raised, the gripping rod 26 comes off from the handle 3 of the catalyst case 4.
from the basket body 18 to one side.

In this way, the catalyst cases 4 in a desired row are taken out of the smoke exhaust duct 1 in order from the top to prevent the seeds from collapsing, and the catalysts housed in the taken out catalyst cases 4 are replaced with new catalysts.

Next, the catalyst cases 4 are stacked on the catalyst rack 2, but the operation may be performed in a manner that is completely opposite to the above-described operation.

The present invention includes a traversing mast device B1 that can traverse along the catalyst assembly unit A, and an elevating cylinder device C that ascends and descends along the mast 11 of the traversing mast device B and is equipped with a catalyst case drawer and pusher device. Since the catalyst case 4 can be assembled and installed inside the smoke exhaust duct 1, the catalyst case 4 can be carried in and out by simply providing one small opening 8 in the bottom wall 7 of the duct.

In other words, if the cross-sectional area is as large as 100 m2 and a large opening or a large number of openings are provided in the wall of the smoke exhaust duct 1, due to problems such as the strength of the smoke exhaust duct 1 and the lid (door → It would be very difficult to achieve a uniform and good seal, and if the seal was to be ensured, the mounting structure of the door would become complicated and the opening/closing operations would become complicated. For example, since only one small opening 8 is required, it is easy to keep the smoke exhaust duct 1 airtight, and the lid can be opened and closed easily.

Further, since the opening 8 is formed in the bottom wall 7 of the smoke exhaust duct 1, it is possible to easily prevent rainwater from entering through the seal portion.

As explained above, the catalyst replacement device for a catalyst installed in a flue gas duct according to the present invention is used in a flue gas treatment device in which a catalyst collection unit is installed in a flue gas duct to reduce NOx, etc. contained in flue gas by the action of the catalyst. This is a temporary installation by removing the lid of the opening when replacing the catalyst.A traversing mast device is installed so that it can traverse across the traversing unit using the upper and lower rails as guides, and the catalyst case drawer is attached to the traversing mast device. Since it is equipped with an elevating cage device that also has a closet device and is further provided with a fixed mast at the opening, the opening can be made small and at least one.
Therefore, it is easy to keep the opening airtight, and furthermore, the catalyst case can be carried in and out by remote control, and the catalyst replacement time can be significantly shortened. Therefore, there is no need for workers to be involved in the work of carrying in and out the catalyst case. This eliminates the need for work at heights and only requires temporary installation of the transverse mast device, making the work extremely safe.Furthermore, workers only need to temporarily install the device and replace the catalyst on the ground, which was previously unnecessary. This has the excellent effect of significantly reducing the number of workers required.

[Brief explanation of the drawing]

The drawings show a catalyst exchange device for a catalyst installed in a smoke exhaust duct according to an embodiment of the present invention, in which FIG. 1 is a side view, FIG. 2 is a front view,
Fig. 3 is a side view of the main parts showing the lifting cage device and the catalyst case drawer/pushing device attached to the lifting cage device, Fig. 4 is a view from the IV-IV arrow shown in Fig. 3, and Fig. 5 is the catalyst It is a perspective view of a case. A... Catalyst assembly unit, B... Traverse mast device,
C... Elevating cage device, D... Catalyst case drawer/pushing device, 1... Smoke exhaust duct, 2... Catalyst rack, 3...
...Handle, 4...Catalyst case, 5...Catalyst, 6...
・Catalyst exchange space, 8... Opening, 9... Upper rail, 10... Lower rail, 11... Mast, 16, 3
5...Motor 18...Cylinder body, 22...Elevating device, 23...Roller table, 24...Elevating frame, 25...Gripping frame, 26...Gripping bar, 2
9... Lifting cylinder device, 31... Threaded rod, 36
...Entrance fixed mast, 37...floor surface.

Claims (1)

[Scope of utility model registration request] Catalyst cases equipped with pull-out handles and containing catalysts are stacked in multiple stages and rows in a catalyst rack installed in the exhaust gas duct to form a catalyst collection unit to remove NO contained in exhaust smoke.
In the exhaust gas treatment equipment that reduces x etc. by the action of a catalyst, the duct space on one side of the catalyst assembly unit is used as a catalyst exchange space, and an opening of a required size that can be closed with a lid or the like is provided in the bottom wall of the duct space on one side of the catalyst assembly unit. A pair of upper and lower running rails are installed horizontally above and below the catalyst assembly unit, and a traversing mast device consisting of a mast and a running device is moved along the running rails and installed so as to be aligned with the opening. At the same time, an elevating cage device equipped with a catalyst case drawer/pushing device is attached to the mast of the transverse mast device so as to be able to rise and fall; A catalyst exchange device for a catalyst installed in a smoke exhaust duct, characterized in that fixed inlet masts are removably erected so as to coincide with each other with a gap.