JPH05719U - Steam reformer - Google Patents

Abstract

(57) [Summary] [Object] To obtain a steam reformer capable of exchanging a reforming catalyst filled between an inner tube and an outer tube without removing the inner tube inserted into the outer tube. [Structure] Upper and lower two stages of tube plates 2 and 3 on top of the reformer body 1
A reforming raw material gas inflow chamber 4 is formed between the upper and lower tube sheets 2 and 3, and a reformed gas outlet chamber 5 is formed on the upper tube sheet 2.
A large number of outer tubes 8 forming a reforming raw material gas channel are suspended in the lower tube sheet 3, and an inner tube 9 forming a reforming gas channel is inserted into each of the outer tubes 8 and the upper end thereof is Above upper tube sheet 2
In order to replace the reforming catalyst 10 charged between the inner and outer tubes 9 and 8 with the upper tube sheet 2 in a steam reformer that is supported by the upper part and is filled with the reforming catalyst 10 between the inner and outer tubes 9 and 8. Is characterized in that a large number of openable and closable catalyst exchange ports 18 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a steam reformer in which an inner tube serving as a reformed gas channel is inserted into an outer tube serving as a reforming raw material gas channel, and a reforming catalyst is filled between the inner and outer tubes.

[0002]

[Prior Art]

 As shown in FIG. 5, the steam reformer is provided with two upper and lower tube plates (upper tube plate 2, lower tube plate 3) on the upper part of the reformer body 1 forming the heating fluid passage. A reforming raw material gas inflow chamber 4 is formed between the partial tube sheets 2 and 3, and a reformed gas outlet chamber 5 is formed on the upper tube sheet 2. These reforming raw material gas inflow chamber 4 and reformed gas outlet chamber 5 are formed. The upper main body 6 forming the above is detachably connected to the reformer main body 1 with the lower tube sheet 3 as a boundary through mounting bolts 7.

Further, in the reformer body 1, a large number of outer pipes 8 forming a reforming raw material gas flow channel are hung on the lower tube sheet 3, and the reformed gas flow flows in each of the outer pipes 8. The inner tubes 9 forming the passages are inserted, the upper ends of the inner tubes 9 are supported by the upper tube sheet 2, and the reforming catalyst 10 is filled between the inner tube 9 and the outer tube 8. ing.

In the steam reformer, the reforming raw material gas (CH ₄ and H ₂ O) flowing into the outer tube 8 is heated to the reforming reaction temperature by the heating fluid, and the reforming catalyst 10 reforms the reforming reaction gas. The reformed gas (3H ₂ , CO) is reformed, and the reformed gas is taken out from the reformed gas outlet chamber 5 through the inner pipe 9.

[0005]

[Problems to be solved by the device]

 By the way, in the steam reformer, since the activity of the reforming catalyst 10 filled between the inner and outer tubes 9 and 8 is gradually deteriorated, the deteriorated reforming catalyst 10 is removed and a new catalyst 10 is added. When the replacement is performed, the mounting bolt 7 is removed, the upper body 6 is removed, and at the same time the inner tube 9 is pulled out together with the upper tube sheet 2, and then a catalyst suction filling nozzle (not shown) is used. ), The reforming catalyst 10 in the outer tube 8 was removed by suction, and a new reforming catalyst 10 was charged.

However, since the troublesome removal and installation of the upper tube sheet 2 and the inner tube 9 are performed every time the reforming catalyst 10 is replaced, there is a problem that the replacement operation of the reforming catalyst 10 takes a long time. , Improvement of the device was desired.

In order to solve the above problems, the present invention provides a steam reformer that can replace the reforming catalyst in a short time without removing the upper tube plate and the inner tube.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides two upper and lower tube plates on the upper part of the reformer body, and the reforming source gas inflow chamber is provided between the upper and lower tube plates on the upper tube plate. A plurality of outer pipes that form a reforming raw material gas passage in the lower tube sheet, and an inner pipe that forms a reforming gas passage is inserted into each of the outer pipes. In the steam reformer whose upper end is supported by the upper tube sheet and the reforming catalyst is filled between the inner and outer tubes, it can be opened and closed to exchange the reforming catalyst filled in the upper tube sheet between the inner and outer tubes. It is configured by providing a large number of catalyst exchange ports.

[0009]

[Action]

 According to the above configuration, when exchanging the reforming catalyst, after opening the catalyst exchanging port and inserting the catalyst suction filling nozzle from the catalyst exchanging port to remove the reforming catalyst between the inner and outer pipes by suction, It is only necessary to fill a new reforming catalyst, and the suction filling of the reforming catalyst is performed remotely and automatically. After the completion of filling the reforming catalyst, the catalyst exchange port is closed.

As described above, since the reforming catalyst can be replaced without removing the upper tube plate and the inner tube, the catalyst replacement work can be easily performed in a short time.

[0011]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 illustrate an embodiment of the steam reformer of the present invention.

In FIG. 1, reference numeral 1 denotes a reformer main body, and the reformer main body 1 is formed in a cylindrical shape with a bottom, and a heating fluid introduction port 11 for introducing a heating fluid is provided at a lower portion thereof and an upper portion thereof. The heating fluid discharge port 12 is provided in the.

Above the reformer body 1, tube plates (upper tube plate 2 and lower tube plate 3) are provided in upper and lower two stages, and a reforming raw material gas flow is provided between the upper and lower tube plates 2 and 3. A reforming raw material gas inflow chamber 4 having an inlet 13 and a reforming gas outlet chamber 5 having a reforming gas outlet 14 are formed on the upper tube sheet 2. The upper body 6 that forms the quality gas outlet chamber 5 is detachably connected to the reformer body 1 with the lower tube sheet 3 as a boundary via mounting bolts 7, and the upper lid 15 is mounted on the upper end portion. It is detachably attached via a bolt 16.

As shown in FIG. 2, a large number of outer pipes 8 forming the reforming raw material gas flow channel are arranged in the lower tube sheet 3 so as to form an equilateral triangle shape and hang down. Are supported by baffle plates 17 provided at intervals in the reformer main body 1. An inner tube 9 forming a reformed gas flow channel is inserted into each outer tube 8, and the upper end of the inner tube 9 extends upward from the outer tube 8 and is supported by the upper tube sheet 2. The reforming catalyst 10 is filled between the inner pipe 9 and the outer pipe 8.

In the present invention, the upper tube sheet 2 is provided with a number of openable / closable catalyst exchange ports 18 for exchanging the reforming catalyst 10 filled between the inner and outer tubes 9 and 8.

As shown in FIG. 3, the catalyst exchange port 18 is intermittently opened in the upper tube sheet 2 at a substantially central position of the equilateral triangular arrangement of the inner tubes 9. 4, a sleeve 19 is provided as shown in FIG. 4, and a removable opening / closing lid 21 is fastened to an upper end portion of the sleeve 19 via a flange 20 with a mounting bolt 22.

Next, the operation of the above embodiment will be described.

The reforming raw material gas (CH ₄ and H ₂ O) flowing between the reforming raw material gas inflow chamber 4 and the inner and outer pipes 9 and 8 is heated to a reforming reaction temperature by the heating fluid flowing in the reformer body 1. It is heated and reformed by the reforming catalyst 10 to be reformed into reformed gas (3H ₂ , CO), and is supplied to the outside from the reformed gas outlet chamber 5 through the inside of the inner pipe 9.

When replacing the reforming catalyst 10 whose activity has deteriorated in the above operation, after opening the upper lid 15 of the upper body 3, a catalyst suction filling nozzle (not shown) is inserted from the opened catalyst exchange port 18. Then, the reforming catalyst 10 between the inner and outer pipes 9 and 8 may be removed by suction, and a new reforming catalyst 10 may be charged, and the operation of the catalyst suction filling nozzle may be performed remotely by an automatic operation or a manual operation. After completion of the catalyst filling, the catalyst exchange port 18 is closed.

In this way, since the reforming catalyst 10 is exchanged by the catalyst suction / filling nozzle inserted from the catalyst exchange port 18, the upper tube sheet 2 and the inner tube 9 are detached and attached as in the conventional apparatus. The reforming catalyst 10 can be replaced without performing the above, and the replacement work can be easily performed in a short time.

Further, since the catalyst exchange port 18 is only opened to the upper tube sheet 2, the catalyst exchange work can be performed without exposing the heating fluid space in the reformer body 1 to the atmosphere.

[0023]

[Effect of the device]

 In summary, according to the present invention, since the catalyst exchange port is provided in the upper tube sheet, the reforming catalyst can be remotely and automatically operated without removing and attaching the upper tube sheet and the inner tube. The replacement work can be done easily in a short time.

[Brief description of drawings]

FIG. 1 is a sectional view illustrating an embodiment of a steam reformer of the present invention.

FIG. 2 is a horizontal sectional view illustrating an arrangement of inner and outer tubes.

FIG. 3 is a horizontal sectional view for explaining the arrangement of catalyst exchange ports.

FIG. 4 is a detailed sectional view of a catalyst exchange port.

FIG. 5 is a sectional view illustrating a conventional example.

[Explanation of symbols]

 1 reformer main body 2 upper tube plate 3 lower tube plate 4 reforming raw material gas inflow chamber 5 reforming gas outlet chamber 8 outer tube 9 inner tube 10 reforming catalyst 18 catalyst exchange port

Claims (1)

[Claims for utility model registration] [Claim 1] Two upper and lower tube plates are provided on the upper part of the reformer body, and a reforming raw material gas inflow chamber is provided between the upper and lower tube plates on the upper tube plate. A reformed gas outlet chamber is formed, and a large number of outer tubes that form a reformed raw material gas channel are hung on the lower tube sheet, and an inner tube that forms a reformed gas channel is inserted into each of the outer tubes. In a steam reformer having its upper end supported by the upper tube sheet and having a reforming catalyst filled between the inner and outer tubes, an opening / closing for exchanging the reforming catalyst filled in the upper tube sheet between the inner and outer tubes. A steam reformer having a large number of possible catalyst exchange ports.