CN216692657U - Expansion device for nitric acid economizer - Google Patents
Expansion device for nitric acid economizer Download PDFInfo
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- CN216692657U CN216692657U CN202123358533.1U CN202123358533U CN216692657U CN 216692657 U CN216692657 U CN 216692657U CN 202123358533 U CN202123358533 U CN 202123358533U CN 216692657 U CN216692657 U CN 216692657U
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- expansion joint
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- nitric acid
- economizer
- expansion
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Abstract
The utility model provides an expansion device for a nitric acid economizer, belongs to the field of nitric acid synthesis, and aims to solve the problem of large displacement of an equipment body caused by temperature difference of a shell side of the nitric acid economizer. Including taking over (1), two barrels (2), flange (3), plug screw (4), expansion joint (5), two gusset (6), two control ring (7) and fastener (8), wherein: the expansion joint is characterized in that two outer sides of the expansion joint (5) are fixedly connected with the two cylinders (2) respectively, the two control rings (7) are installed on the two outer sides of the expansion joint (5) respectively and are fixedly connected with the two cylinders (2) respectively, the rib plates (6) are fixedly connected with the control rings (7) and the cylinders (2) respectively, one ends of the connecting pipes (1) extend out from the hole of the cylinders (2), the other ends of the connecting pipes (1) extend into the expansion joint (5), the flanges (3) are installed at the hole of the cylinders (2) and are sealed by screw plugs (4), and the fasteners (8) are used for fixing the two control rings (7).
Description
Technical Field
The utility model relates to the technical field of nitric acid synthesis, in particular to an expansion device for a nitric acid economizer.
Background
The nitric acid economizer is used as key equipment in a nitric acid synthesis device, and is mainly used for heating boiler feed water through nitric oxide gas. Boiler water is fed from the shell side of the nitric acid economizer, and the pressure is higher; the tube side is nitrogen oxide gas. The temperature difference of the side inlet and the side outlet of the pipe shell reaches more than 100 ℃, so that the relative displacement of the side of the pipe shell reaches more than 10 mm. The heat exchanger of the nitric acid economizer is in a fixed tube sheet type, and the displacement of the nitric acid economizer caused by the temperature difference of the tube shell side can be compensated only by arranging a reasonable expansion joint structure on the shell side.
Disclosure of Invention
In order to compensate the technical problem of large displacement of the device body caused by the temperature difference of the shell side of the nitric acid economizer, the utility model provides the expansion device for the nitric acid economizer, and the displacement caused by the temperature difference of the shell side can be compensated after the expansion device is applied to the nitric acid economizer.
In order to solve the technical problems, the utility model adopts the technical scheme that:
the utility model provides an expansion device for nitric acid economizer, its includes takeover, two barrels, flange, plug screw, expansion joint, two gusset, two control rings and fastener, wherein: the two outer sides of the expansion joint are fixedly connected with the two cylinders respectively, the two control rings are installed on the two outer sides of the expansion joint respectively and are fixedly connected with the two cylinders respectively, the rib plates are fixedly connected with the control rings and the cylinders respectively, one end of the connecting pipe extends out of the hole of the cylinder, the other end of the connecting pipe extends into the expansion joint, the flange is installed at the hole of the cylinder and is sealed by a screw plug, and the fastener is used for fixing the two control rings.
Optionally, the expansion joint is a multi-layer, multi-wave, U-shaped expansion joint.
The utility model has the beneficial effects that:
through setting up structures such as barrel, expansion joint and control ring, provide an expansion device for nitric acid economizer, can compensate the displacement volume that the pipe shell side difference in temperature leads to through the device. The utility model can compensate the larger displacement of the nitric acid economizer body on the premise of meeting the requirements of economy and feasibility.
Drawings
FIG. 1 is a cross-sectional view of the present invention.
FIG. 2 is a schematic view showing the connection relationship between the present invention and a nitric acid economizer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the expansion device for a nitric acid economizer in the present embodiment includes a nozzle 1, two cylinders 2, a flange 3, a plug screw 4, an expansion joint 5, two rib plates 6, two control rings 7, and a fastener 8, wherein: the two outer sides of the expansion joint 5 are respectively welded with the two cylinders 2, the two control rings 7 are respectively installed on the two outer sides of the expansion joint 5 and respectively welded with the two cylinders 2, the rib plates 6 are respectively welded with the control rings 7 and the cylinders 2, one end of the connecting pipe 1 extends out of the hole of the cylinder 2, the other end of the connecting pipe 1 extends into the expansion joint 5, the flange 3 is installed at the hole of the cylinder 2 and is sealed by the screw plug 4, and the fastener 8 is used for fixing the two control rings 7.
Optionally, the expansion joint 5 is a multi-layer, multi-wave, U-shaped expansion joint.
As shown in figure 2, when the utility model is used, two cylinders 2 are respectively connected with the shell of the nitric acid economizer 101. Before the nitric acid economizer 101 runs, the expansion joint 5 is in a compressed state, and the two control rings 7 are fixed by the fastening piece 8. When the nitric acid economizer 101 runs, the fastener 8 is removed, the expansion joint 5 is in a zero position state (neither stretched nor compressed) when the medium flows in the nitric acid economizer 101, and the relative displacement of the shell side is compensated through the expansion amount of the expansion joint from the compression state to the zero position state. During the pressure test or the maintenance process of the nitric acid economizer 101, residual gas can be discharged through the connecting pipe 1.
The control ring 7 ensures that the expansion joint 5 is in a compressed state before the device is operated, and strengthens the shell ring 2 on both sides of the expansion joint 5.
The expansion joint has a single-layer form and a multi-layer form, and the shell design pressure of the nitric acid economizer 101 is considered to be 5.5Mpa, if the single-layer expansion joint is designed, the thickness is larger, the economical efficiency is poor, and the use requirement cannot be met, so that the multi-layer multi-wave U-shaped expansion joint is arranged on the shell, each layer of corrugated pipe of the expansion joint 5 is thinner, the requirement of larger expansion displacement can be met, the pressure bearing capacity of the expansion joint is improved, and the service life of the expansion joint 5 is prolonged.
Production practices prove that the nitric acid economizer can reduce the thickness of the tube plate, save the cost by about 20 percent and ensure the safe and stable operation of the nitric acid economizer.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the utility model, and these modifications and improvements are also considered to be within the scope of the utility model.
Claims (2)
1. The utility model provides an expansion device for nitric acid economizer which characterized in that, is including taking over (1), two barrel (2), flange (3), plug screw (4), expansion joint (5), two gusset (6), two control ring (7) and fastener (8), wherein: the expansion joint is characterized in that two outer sides of the expansion joint (5) are fixedly connected with the two cylinders (2) respectively, the two control rings (7) are installed on the two outer sides of the expansion joint (5) respectively and fixedly connected with the two cylinders (2) respectively, the rib plates (6) are fixedly connected with the control rings (7) and the cylinders (2), one end of the connecting pipe (1) extends out of the opening of the cylinders (2), the other end of the connecting pipe (1) extends into the expansion joint (5), the flange (3) is installed at the opening of the cylinders (2) and sealed by the screw plugs (4), and the fastening piece (8) is used for fixing the two control rings (7).
2. Expansion device for nitric acid economizers according to claim 1, characterized in that said expansion joints (5) are multilayer, multiwave U-shaped expansion joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123358533.1U CN216692657U (en) | 2021-12-29 | 2021-12-29 | Expansion device for nitric acid economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123358533.1U CN216692657U (en) | 2021-12-29 | 2021-12-29 | Expansion device for nitric acid economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216692657U true CN216692657U (en) | 2022-06-07 |
Family
ID=81845205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123358533.1U Active CN216692657U (en) | 2021-12-29 | 2021-12-29 | Expansion device for nitric acid economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216692657U (en) |
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2021
- 2021-12-29 CN CN202123358533.1U patent/CN216692657U/en active Active
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