JPH0422828Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a reactor structure having a catalyst loading/unloading device, and particularly to a reactor structure that requires a catalyst loading/unloading device independent of the reactor main body for loading and replacing the catalyst. Regarding the structure of the reactor.

[Conventional technology]

FIG. 3 shows a conventional reactor and catalyst loading/unloading device.

Conventionally, in a reactor 2 in a denitrification facility or the like that uses a catalyst block 1, the catalyst inlet 13 is located at the same position in the vertical direction. This is carried out using a catalyst loading/unloading device 14 installed independently of the vessel 2. The catalyst loading/unloading device 14 is
It is composed of a steel frame 12, a hoist rail 3b supported by the steel frame 12, and a hoist 4 attached to the hoist rail.

The method for transporting the catalyst block 1 is as follows: First, the catalyst block 1 is transported by a truck, transferred to a forklift, and transported to the lower part of the catalyst transport/unloading frame 12. The catalyst block 1 carried into the lower part of the external loading/unloading frame 12 is lifted in the height direction of the reactor 2 by an electric hoist 4, and an external hoist is connected to the inside of the reactor 2 from the catalyst loading/unloading port 13. It is carried into the reactor 2 along the rail 3 by a hoist 4.

Here, due to a problem in lifting the catalyst block 1, the external hoist rail 3 is changed from the lowest external hoist rail 3b to the upper external hoist rail 3.
It is necessary to sequentially increase the length of the rail as the distance b increases.

Despite having such a large structure,
This equipment is only used once every few years to fill or replace the catalyst, and it is not only uneconomical in terms of construction costs, but improvements are also desired in terms of effective use of equipment space. . Furthermore, since the catalyst block 1 is operated within the external carrying frame 12 when hoisting the catalyst block 1, it is impossible for safety reasons to operate all hoists 4 on the upper, middle, and lower stages at the same time, which increases the time required to carry the catalyst block 1. I was used to it.

[Problem that the invention attempts to solve]

As described above, in the prior art, sufficient consideration was not given to economics and the effective use of installation space, and a large number of man-hours were also required for the time required for loading and unloading the catalyst. The purpose of the present invention is to eliminate the drawbacks of the conventional technology described above, and to provide a reaction system that is equipped with a catalyst loading/unloading device that does not require a separate independent catalyst loading/unloading device or an accompanying increase in equipment area, and can reduce catalyst loading/unloading time. It is to provide the equipment.

[Means for solving problems]

In order to achieve the above object, the present invention arranges the catalyst loading and unloading ports corresponding to each catalyst layer of the reactor so that they are not located at the same position in the vertical direction, and the upper part of each loading and unloading port is equipped with a hoist and a hoist rail. The reactor is characterized by a structure in which a catalyst loading/unloading device is connected to the inside of the reactor.

[Effect]

Since each catalyst loading/unloading port is not located at the same position in the vertical direction, a hoist rail having a minimum length from the reactor can be provided, for example, by a cantilever beam. Therefore, there is no need to provide a separate and independent catalyst carrying frame, and since the catalyst loading and replacing operations in each catalyst layer are not carried out at the same hanging position, each operation can be carried out independently and at the same time. It also becomes possible to lift it directly from the truck.

From the above, it is possible to reduce the equipment installation space or shorten the catalyst filling process.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a device according to an embodiment of the present invention;
FIG. 2 shows a side sectional view.

The untreated gas discharged from the boiler passes through the catalyst block 1 in the reactor 2, thereby reducing _NOx . In addition, as shown in Fig. 2, the catalyst layer is usually arranged in several layers (stages) due to the relationship between pressure loss and the strength of the catalyst block 1, but in this explanation, there are three layers.
This will be explained using layers as an example.

In FIG. 2, three layers of catalyst installation space are provided inside the reactor 2: an upper catalyst block 1a, a middle catalyst block 1b, and a lower catalyst block 1c. At the top of each layer are catalyst blocks 1a, 1.
A hoist rail 3a is attached to the steel frame of the reactor 2 to which a hoist 4 for carrying in and out the catalyst (b, 1c) is attached. Furthermore, inside this reactor 2, an external hoist rail 3b that is continuous with the internal hoist rail 3a and protrudes to the outside of the reactor 2 is installed on a cantilever beam or a pedestal supported by the steel frame of the reactor 2, or as a rail support. It is supported by member 11. Here, the top external hoist rail 3b
The length _l2 is larger than ( _l2 + b/2) so that the catalyst block 1 does not come into contact with the sidewalk 5, etc. Further, a hoist 4 is attached to the hoist rail 3. Here, the hoist rail 3 of each catalyst layer is the first
As shown in the figure, the hoist rails 3 are provided in a staggered manner so that they are not located at the same position in the vertical direction.

In such a structure, the method of carrying in and out the catalyst block 1 is to position the truck 8 loaded with the catalyst block 1 directly below the external hoist rail 3b, hoist the catalyst block 1 directly above using the hoist 4, and move it along the hoist rail 3. The catalyst is introduced into the catalyst inlet/outlet 13 of the reactor 2 and arranged. In addition, internal lateral arrangement may be performed using a trolley.

Since the external hoist rails 3b and the catalyst loading/unloading ports 13 are arranged in a staggered manner in this manner, the upper catalyst block 1a, the middle catalyst block 1b, and the lower catalyst block 1c can be loaded and unloaded at the same time.

As mentioned above, by structuring the catalyst inlet, that is, the hoist rail, in each catalyst layer so that they are not located at the same position in the vertical direction, the protruding length _l2 of the hoist rail outside the reactor can be made very short. Therefore, sufficient strength can be obtained by supporting the hoist rail with a cantilever beam or a simple support 11 supported from the reactor. Therefore, there is no need to install separate large-scale specialized equipment for carrying in and out the catalyst, which only happens once every few years, and the work can be carried out independently and at the same time for each catalyst layer. It is possible to significantly reduce time. From the above, it is extremely advantageous in terms of equipment space, economy, and work.

[Effect of idea]

According to the present invention, the hoist rail 3 for loading and unloading the catalyst can be supported directly from the reactor steel frame 2, so there is no need to provide a separate large-scale dedicated loading/unloading facility. Therefore, it is possible to reduce equipment space and equipment costs. Furthermore, since the hoist rail positions are not at the same position in the vertical direction, each catalyst layer can be carried in and out at the same time and independently, so the number of man-hours required to carry in and out the catalyst can be significantly reduced.

[Brief explanation of drawings]

1 and 2 show a reactor structure and a catalyst loading/unloading device according to an embodiment of the present invention, FIG. 1 being a perspective view thereof, and FIG. 2 being a side sectional view thereof. FIG. 3 is a perspective view of a conventional reactor structure and catalyst loading/unloading device. 1... Catalyst block, 2... Reactor, 3... Hoist rail, 4... Hoist, 13... Catalyst loading/unloading port, 14... Catalyst loading/unloading device.

Claims (1)

[Scope of utility model registration request] In a reactor with a plurality of catalyst layers having two or more layers and a catalyst inlet/outlet corresponding to each layer for carrying in and out the catalyst, each of the inlet/outlets is arranged so as not to be located at the same position in the vertical direction, A reactor structure having a catalyst loading/unloading device, characterized in that a catalyst loading/unloading device connected to the inside of the reactor is provided above each loading/unloading port.