TWI673100B - Switching apparatus for adsorption towers - Google Patents

Abstract

The present invention provides a switching device that can be conveyed even if it is a large-sized switching device and can minimize field construction.

The switching device of the present invention includes: a gas manifold module 11 having at least a gas feeding section (L1, 31) and a gas sending section (L6, 32); and a first switching module 12 and a first The two switching modules 13 are respectively arranged on both sides via the gas manifold module 11.

Description

Switching device of adsorption tower

The invention relates to a switching device for switching the adsorption processing in at least two adsorption towers.

In the conventional large-scale air separation device or nitrogen generation device, a method of removing moisture or carbon dioxide from the compressed air by using a refining device and performing cryogenic separation in a cold box is adopted. In this purification apparatus, an adsorption tower filled with an adsorbent such as activated alumina or zeolite is used to remove moisture or carbon dioxide. Generally, two or more adsorption towers are used for the operation of the air separation device. For example, during the purification process of air in the first tower, heat regeneration or pressure regeneration is performed in the second tower that is saturated with moisture or carbon dioxide. Then, the processes are alternately switched between the first tower and the second tower. Therefore, this refining device includes a switching device including an adsorption tower having at least two columns, and valves and piping for switching operations thereof.

For example, the above-mentioned switching device has a complicated structure for switching two or more adsorption towers, and the construction is not simple. The method of assembling the switching device in the production workshop and transporting it to the installation site is also good and economical.

Patent Document 1 discloses a structure in which part or all of the devices constituting the air separation device are housed in one or more containers in order to facilitate the transportation or assembly of the device. Containers and machines outside containers and containers with The connection portion of the piping between other containers is a flange structure, and the connection portion of the wiring is a joint structure. As a specific configuration, an air compressor, a catalyst cylinder, and a control device are housed in the container 1a, and a raw air pretreatment device such as a freezer unit, an air cooler, a heater, an adsorber, and an adsorber controller is housed in the container 1b. And controls. Patent Document 1 discloses that it can be applied to a small-sized air liquefaction separation device, and can also be applied to a small pressure-variable adsorption separation device. Patent Document 1 describes that containers of various sizes and shapes can be produced within the limits of transportation, but only for the purpose of storing one set of pretreatment equipment in a single container.

Patent Document 2 discloses a modular air rectification device having universality that can be applied to almost all air rectification devices even with a large size. Specifically, a "warm" module (3) connected to two adsorption-type air purification bottles is disclosed. The "warm" module (3) is connected to the air compression module (1) and the low temperature module (4) respectively, and has the function of switching between adsorption and regeneration processing in 2 adsorption-type air refining bottles. However, the "Wen" module (3) only reveals a single frame structure.

[Prior technical literature]

[Patent Literature]

[Patent Document 1] Shikaihei 4-27388

[Patent Document 2] Japanese Patent Laid-Open No. 6-347164

In recent years, as the size of the air separation device has increased, the size of the switching device has also increased. Therefore, there is a concern that the space cannot be transported due to the space limitation of the transport path. In this case, the parts of the switching device can also be transported to the installation site for assembly, but there may also be situations in which the necessary complicated piping construction increases the cost of on-site operations, and due to the shortage of skilled workers in recent years, Substantially impossible to construct.

In view of the above problems, an object of the present invention is to provide a large-scale switching The device can also be transported and can be used as a minimum switching device on site.

The switching device of the present invention includes: a gas manifold module (11), which has at least a gas feeding portion (L1, 31) and a gas sending portion (L6, 32); and a first switching module ( 12) and a second switching module (13), which are respectively arranged on both sides via the gas manifold module (11).

The gas manifold module (11) may be a piping layout having the following piping: branched from the main pipeline (L1) of the feed section of the gas manifold module (11) and facing the first switching module (12) The first branch feeding pipe (L1a) and the second branch feeding pipe (L1b) toward the second switching module (13); and the pipe (first sending side branch) from the first switching module (12) The first branch delivery pipe (L6a) corresponding to the pipe (L5a)) and the second branch delivery pipe (L6b) corresponding to the pipe (third delivery side branch pipe (L10a)) from the second switching module (13) described above ; And a connecting piping (L12), which piping from the first switching module (12) (second delivery side branch piping (L5b)) and piping from the second switching module (13) (fourth sending The side branch pipe (L10b)) is connected.

The configuration of the main pipe (L6) connected to the delivery section of the gas manifold module for the first branch delivery pipe (L6a) and the second branch delivery pipe (L6b) to converge and may be configured.

The above-mentioned first switching module (12) may have a first feed-in pipe (L2), which is connected to the first branch feed-in pipe (L1a) and is connected to the inlet pipe (L3) of the first adsorption tower (201). Connection; the first delivery side main pipe (L5) is connected to the outlet pipe (L4) of the first adsorption tower (201); the first delivery side branch pipe (L5a) is from the first delivery side main pipe ( L5) is branched and connected to the first branch delivery pipe (L6a); and the second delivery side branch pipe (L5b) is branched from the first delivery-side main pipe (L5) and connected to the connection pipe (L12).

The "connection" between the pipes may be a connection using a flange.

The second switching module (13) includes a second feed-in pipe (L7), which is connected to the second branch feed-in pipe (L1b) and is connected to the inlet pipe (L8) of the second adsorption tower (202). ; The second delivery side main pipe (L10) is connected to the outlet pipe (L9) of the second adsorption tower (202); the third delivery side branch pipe (L10a) is from the second delivery side main pipe (L10) It is branched and connected to the second branch delivery pipe (L6b); and the fourth delivery side branch pipe (L10b) is branched from the second delivery side main pipe (L10) and connected to the connection pipe (L12).

The "connection" between the pipes may be a connection using a flange.

The connection piping (L12) may be provided with a pressure balancing valve (111). Instead of or in addition to the pressure balancing valve (111), a pressure balancing valve may be provided in at least one or both of the second delivery-side branch pipe (L5b) and the fourth delivery-side branch pipe (L10b). A pressure control valve or a constant pressure valve may be provided instead of the pressure balance valve.

The first delivery-side branch pipe (L5a) may be provided with a valve (123). The valve (123) has the function of an isolation valve.

The third delivery-side branch pipe (L10a) may be provided with a valve (133). The valve (133) has the function of an isolation valve.

Replace the valve (123) of the first delivery side branch pipe (L5a) and the valve (133) of the third delivery side branch pipe (L10a), or additionally, in the first branch delivery pipe (L6a) and the second branch At least one or both of the delivery pipes (L6b) may be provided with an isolation valve.

The piping layout of the first switching module and the piping layout of the second switching module may also be symmetrically configured with the gas manifold module as a reference.

The piping layout of the first switching module and the piping layout of the second switching module may be configured asymmetrically based on the gas manifold module as a reference.

A depressurizing valve (122) may be provided in the first feed-side pipe (L2).

A pressure reducing valve (132) may be provided in the second feed-side pipe (L7).

Each of the gas manifold module (11), the first switching module (12), and the second switching module (13) can also use the height position of the connection pipe (L12) of the gas manifold module (11) as a reference. It can be further separated from the top and bottom.

The height of the connecting piping (L12) is not particularly limited, and a height of 20 to 80% of the height of the module from the bottom to the top can be exemplified.

The connection piping (L12) can be arranged on either the upper side or the lower side of the divided gas manifold module (11).

The second delivery-side branch piping (L5b) and the fourth delivery-side branch piping (L10b) connected to the connection piping (L12) can be similarly arranged at any position above or below the divided module.

Each of the gas manifold module (11), the first switching module (12), and the second switching module (13) can be further separated, so that it can be pre-assembled into a smaller module and placed on site. Make simple settings.

Although the shape of the frame (pillar) of each module constituting the switching device is exemplified by a cylinder, a polygonal prism, etc., in terms of ease of assembly and strength, it is also preferably a cube or a cuboid.

The size of the switching device (the size stored in the rectangular parallelepiped) can be based on the main piping (L1, L1a, L1b, L6, L6a, L6b, L2, L5, L7, L10, etc.) that is set according to the required amount of raw material air The piping diameter is set.

The dimensions (length a, width b, height c) of each module stored in the rectangular body can be based on the main piping (L1, L1a, L1b, L6, L6a, L6b, L2, which is set according to the required amount of raw material air). L5, L7, L10, etc.) are set for the diameter of the piping and the size of the transport limit.

With this, the mold can be determined by the diameter of the piping set according to the amount of raw material air and the size of the transport limit. Group size makes module design easier.

According to the switching device configured as described above, it is possible to provide a switching device that can be transported even with a large-sized switching device and can minimize field construction.

1‧‧‧ switch device

11‧‧‧gas main module

12‧‧‧The first switching module

13‧‧‧Second Switching Module

23, 24, 25, 26, 27, 28‧‧‧

31.L1‧‧‧Feeding Department

32, L6‧‧‧ Delivery Department

111‧‧‧pressure balance valve

122, 132‧‧‧ pressure reducing valve

123, 133‧‧‧ isolation valve

201‧‧‧The first adsorption tower

202‧‧‧Second adsorption tower

L1a‧‧‧The first branch is sent to the piping

L1b‧‧‧Second branch feed pipe

L2‧‧‧First feed side piping

L3, L8‧‧‧Inlet piping

L4, L9‧‧‧ outlet piping

L5‧‧‧The first delivery side main piping

L5a‧‧‧First delivery side branch piping

L5b‧‧‧Second delivery pipe

L6a‧‧‧The first branch sends out the piping

L6b‧‧‧Second branch delivery pipe

L7‧‧‧Second inlet pipe

L10‧‧‧Second delivery main pipe

L10a‧‧‧Third delivery side branch piping

L10b‧‧‧The fourth delivery side branch pipe

L12‧‧‧Connecting piping

FIG. 1 is a diagram showing a configuration example of a switching device according to the first embodiment.

FIG. 2A is a diagram showing a module design example of the switching device according to the first embodiment. FIG.

FIG. 2B is a diagram showing a module design example of the switching device according to the first embodiment.

Fig. 3 is a diagram showing a configuration example of a switching device according to a second embodiment.

Fig. 4 is a diagram showing a configuration example of a switching device according to a third embodiment.

(Embodiment 1)

A switching device 1 according to the first embodiment will be described with reference to FIG. 1. The switching device 1 of the first embodiment is divided into three modules. The switching device 1 includes a gas manifold module 11 having a gas feeding section (L1, 31) and a gas sending section (L6, 32), and a first switching module 12 and a second switching module. The groups 13 are respectively arranged on both sides via the gas manifold module 11. In this embodiment, the piping layout of the first switching module 12 and the piping layout of the second switching module 13 are symmetrically configured with the gas manifold module 11 as a reference.

The main pipe L1 of the feeding portion is connected to the inlet connection portion 31. The main pipe L6 of the sending section is connected to the outlet connecting section 32. The inlet connection portion and the outlet connection portion are each configured to be flange-connectable to other external pipes.

The connection portions (23, 24, 25, 26, 27, 28) of the modules are configured to be flange-connectable.

The gas manifold module 11 functions in such a manner that the first adsorption module 201 and the second adsorption tower 202 alternately perform adsorption processing and regeneration processing to implement the first switching module 12, the first The second switching module 13 is used for sending in and receiving gas.

The central gas manifold module 11 has a branch from the main pipe L1 of the feeding section of the gas manifold module 11 and feeds the pipe L1a toward the first branch of the first switching module 12 and faces the second switching module 13 The second branch feeding pipe L1b; the first branch sending pipe L6a corresponding to the first sending-side branch pipe L5a from the first switching module 12 and the third sending side branch pipe from the second switching module 13 The second branch sending pipe L6b corresponding to L10a; and the connecting pipe L12, which connects the second sending-side branch pipe L5b from the first switching module 12 and the fourth sending-side branch pipe L10b from the second switching module 13. .

The first branch delivery pipe L6a and the second branch delivery pipe L6b merge and are connected to the main pipe L6 of the delivery section.

The first switching module 12 includes: a first feed-side pipe L2, which is connected to the first branch feed-in pipe L1a, and is connected to the inlet pipe L3 of the first adsorption tower 201; and a first feed-side main pipe L5, which is connected to The outlet pipe L4 of the first adsorption tower 201 is connected; the first delivery-side branch pipe L5a is branched from the first delivery-side main pipe L5 and connected to the first branch delivery pipe L6a; and the second delivery-side branch pipe L5b is The first delivery-side main pipe L5 is branched and connected to the connection pipe L12.

The second switching module 13 has a second feeding side pipe L7, which is connected to the second branch feeding pipe L1b, and is connected to the inlet pipe L8 of the second adsorption tower 202; and a second sending side main pipe L10, which is connected to The outlet pipe L9 of the second adsorption tower 202 is connected; the third delivery-side branch pipe L10a is branched from the second delivery-side main pipe L10 and connected to the second branch delivery pipe L6b; and the fourth delivery-side branch pipe L10b is The second delivery-side main pipe L10 is branched and connected to the connection pipe L12.

A pressure balancing valve 111 is provided in the connection pipe L12. An isolation valve 123 is provided in the first delivery-side branch pipe L5a. An isolation valve 133 is provided in the third delivery-side branch pipe L10a. First The feed-side pipe L2 is provided with a pressure reducing valve 122. A pressure reducing valve 132 is provided in the second feed-side pipe L7.

The shape of the frame (pillar) of each module 11, 12, 13 constituting the switching device 1 is a rectangular parallelepiped, and according to the amount of raw material air and the main piping (L1, L1a, L1b, L6, L6a, L6b, L2, L5, L7) , L10, etc.) determine the module size (length a, width b, height c) by the diameter of the piping and the size of the transport limit.

Design examples of each module are shown in FIGS. 2A and 2B.

When the amount of raw material air is 30,000 Nm ³ / h, 50000 Nm ³ / h, and 90,000 Nm ³ / h, the piping diameters are set to 18, 24, and 32 inches, respectively. Calculate the overall size of the switching device under these conditions.

Dividing is performed so that one of the three orthogonal sides of the rectangular parallelepiped of the switching device is within 3.5m and the other side is within 5m.

(1) When the amount of raw material air is 30000Nm ³ / h

Length a: 2.7m (divide 8m into 3 parts)

Width b: 4m (within 5m)

Height c: 5m (within 5m)

(2) When the amount of raw material air is 50000Nm ³ / h

Length a: 3.4m (divide 10m into 3 parts)

Width b: 6m

Height c: 3.5m (7m divided into 2 parts)

(3) When the amount of raw material air is 90,000 Nm ³ / h

Length a: 3.2m (divide 22m into 7 parts)

Width b: 5m (divide 10m into 2 parts)

Height c: 11m

When the amount of raw material air is 30,000 Nm ³ / h, the module division corresponding to the form 1 (Fig. 1) can be implemented.

The diameter of the pipe corresponding to the amount of raw material air is an example, and is not particularly limited to the value shown in FIG. 2.

The division of the module is not limited to the division in the length direction, but may also be the width direction and the height direction.

(Embodiment 2)

The switching device 1 according to the second embodiment will be described with reference to FIG. 3.

Structures different from the first embodiment will be described, and structures having the same reference numerals have the same functions as those of the first embodiment.

In FIG. 3, the gas manifold module is configured to be vertically separable, and includes a lower gas manifold module 11a and an upper gas manifold module 11b.

In the present embodiment, the delivery pipe L6, the first branch delivery pipe L6a, the second branch delivery pipe L6b, and the connection pipe L12 are arranged in the upper gas header module 11b.

The first switching module is configured in the same manner as the gas manifold module so as to be vertically separable, and includes a lower first switching module 12a and an upper first switching module 12b.

In this embodiment, the first delivery-side main pipe L5, the second delivery-side branch pipe L5a, and the second delivery-side branch pipe L5b are arranged in the upper first switching module 12b.

The second switching module is configured in the same manner as the gas manifold module so that it can be divided up and down, and includes a lower second switching module 13a and an upper second switching module 13b.

In this embodiment, the second delivery-side main pipe L10, the third delivery-side branch pipe L10a, and the fourth delivery-side branch pipe L10b are arranged in the upper second switching module 13b.

(Embodiment 3)

A switching device 1 according to the third embodiment will be described with reference to FIG. 4.

In the regeneration of the adsorption tower, the exhaust gas from the cold box of the air separation device is used instead of the dry air (that is, the gas at the exit of the adsorption tower) for the regeneration of the adsorption tower. In the switching device 1, the exhaust gas from the The air separation device is connected to a pipe L401 in the gas header module 11 of the switching device 1 through a pipe L400. The piping L401 is connected to the piping L402 of the first switching module 12 via the connection portion 411. An isolation valve 401 is provided in the piping L402. In this embodiment, the pipe L402 is connected to the pipe L5b, but may be connected to the pipe L5 or the pipe L5a. The piping L401 is connected to the piping L403 of the second switching module 13 via the connection portion 412. An isolation valve 402 is provided in the piping L403. Although the pipe L403 is connected to the pipe L10b in this embodiment, it may be connected to the pipe L10 or the pipe L10a. The used exhaust gas is discharged from the pressure reducing valve 122 and the pressure reducing valve 132.

(Another embodiment)

In Embodiments 1, 2, and 3, the piping layout is not limited to those shown in Figs. 1, 2, and may have a straight line or a curved line. For example, it may be formed by a straight pipe, an L-shaped pipe, or a U-shaped pipe. The branch portions may also be T-shaped pipes. Connected by flange.

In Embodiments 1, 2, and 3, the number of adsorption towers is two, but it is not limited to two, and may be three or more. For example, when the adsorption tower is n (n = 3, 4, ‧‧) towers, it may also have a gas manifold module, first, second, and n-th switching modules. It is also possible to arrange the first, second, and n-th switching modules around the gas manifold module as its center. Preferably, the number of adsorption towers is the same as the number of switching modules. The piping layout of the switching module has the same structure, and the gas manifold module controls the feeding of the gas to the adsorption tower that performs adsorption processing and regeneration processing.

Also, as illustrated in FIG. 2B, the switching device can divide the gas manifold module into two or more parts, the first switching module can be divided into two or more parts, and the second switching module can also be divided into two The above part. It is not limited to the division method shown in FIG. 2B.

Claims (4)

A switching device includes: a gas manifold module having at least a gas inlet and a gas outlet; and a first switching module and a second switching module, which are separated by the gas manifold. The gas manifold module has branching from the main piping of the feeding section of the gas manifold module and feeding the piping toward the first branch of the first switching module and facing the first The second branch sending-in piping of the two switching modules; the first branch sending-out piping corresponding to the piping from the first switching module and the second branch sending-out piping corresponding to the piping from the second switching module; and the connection A piping, which connects the piping from the first switching module with the piping from the second switching module; the first switching module has a first feed-side piping that is connected to the first branch feed piping And is connected to the inlet pipe of the first adsorption tower; the first delivery side main pipe is connected to the outlet pipe of the first adsorption tower; the first delivery side branch pipe is from the first delivery pipe The side main pipe is branched and connected to the first branch sending pipe; and the second sending side branch pipe is branched from the first sending side main pipe to be connected to the connecting pipe; the second switching module has: a second sending The inlet side pipe is connected to the second branch inlet pipe and is connected to the inlet pipe of the second adsorption tower; the second outlet side main pipe is connected to the outlet pipe of the second adsorption tower; The third delivery-side branch pipe is branched from the second delivery-side main pipe to the second branch delivery pipe; and the fourth delivery-side branch pipe is branched from the second delivery-side main pipe to the connection Piping. The switching device according to claim 1, wherein the piping layout of the first switching module and the piping layout of the second switching module are symmetrically configured with the gas manifold module as a reference. The switching device according to claim 1 or 2, wherein each of the gas manifold module, the first switching module, and the second switching module is based on a height position of the connecting piping of the gas manifold module as The reference may be further separated from the top and bottom. The switching device according to claim 1 or 2, wherein the size of each module accommodated in the rectangular parallelepiped is set based on the piping diameter of the piping set in accordance with the required amount of raw material air, and the delivery restriction size.