CN216081142U - Gas-liquid distribution device for preventing salt corrosion of heat exchanger - Google Patents
Gas-liquid distribution device for preventing salt corrosion of heat exchanger Download PDFInfo
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- CN216081142U CN216081142U CN202122720454.4U CN202122720454U CN216081142U CN 216081142 U CN216081142 U CN 216081142U CN 202122720454 U CN202122720454 U CN 202122720454U CN 216081142 U CN216081142 U CN 216081142U
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- heat exchanger
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Abstract
一种用于防止换热器结盐腐蚀的气液分布装置，本实用新型通过将分流管（21）设置在管程入口（11）的内缘面上，然后在分流管的下部设置复数个分流孔（22），可以将换热器前注入的液态水均匀的分布到全部的换热管束入口，使每个换热管束都能达到液态水的冲洗，有效避免结晶铵盐在换热管束入口位置堆积，造成堵塞或垢下腐蚀泄露等事故风险，充分达到注水的作用等，本实用新型具有结构简便，使用效果好等优点，适合大范围的推广和应用。
A gas-liquid distribution device for preventing salt corrosion of heat exchangers, the utility model arranges a shunt pipe (21) on the inner edge surface of the pipe side inlet (11), and then arranges a plurality of shunt pipes at the lower part of the shunt pipe The diverter hole (22) can evenly distribute the liquid water injected before the heat exchanger to the inlets of all the heat exchange tube bundles, so that each heat exchange tube bundle can be flushed with liquid water, and effectively avoid the crystalline ammonium salt in the heat exchange tube bundle. The accumulation at the entrance will cause accident risks such as blockage or corrosion and leakage under the scale, and fully achieve the effect of water injection.
Description
Technical Field
The utility model relates to a gas-liquid distribution device, in particular to a gas-liquid distribution device for preventing salt corrosion of a heat exchanger.
Background
It is known that during the production of hydrogenation plants, the raw materials to be treated contain elements such as sulfur, hydrogen, chlorine, nitrogen, etc., and are converted into ammonium salts, i.e., ammonium chloride, ammonium sulfide and ammonium bisulfide, during the processing. After the generated ammonium salt enters the heat exchanger along with the gas-phase reaction product, namely high-temperature gas, the temperature of the high-temperature gas is reduced due to heat exchange, the solubility of the ammonium salt in a gas-phase medium is reduced, and then the ammonium salt is separated out to form crystals.
As shown in fig. 1 and 2, in the case of the hydrogenation apparatus, since the reaction product, i.e., the high-temperature gas 02 enters the heat exchange tube bundle 16, i.e., the tube side of the heat exchanger, heat exchange occurs with the cold medium of the shell side, and the temperature is reduced, a low-temperature gas 03 is formed. In this process, the solubility of the ammonium salt in the hot gas 02 is reduced due to the temperature reduction of the reaction product, i.e., the hot gas 02, and precipitated crystals are formed. In actual production, the precipitated crystalline ammonium salt 13 is mainly concentrated at the inlet of the heat exchange tube bundle 16 of the heat exchanger, the crystalline ammonium salt 13 is continuously deposited at the inlet of the heat exchange tube bundle 16, and a scale surface is formed on the surface of the tube plate 15 of the heat exchanger, so that the heat exchange efficiency is influenced, the energy consumption of a system is increased, and the heat exchange tube is blocked in serious cases, so that the process is interrupted, and the device stops. Meanwhile, the ammonium salt cannot cause too much corrosion and only causes the problem of blockage, but the ammonium salt is very easy to absorb moisture and deliquesce, and forms a strong acid corrosion environment with extremely high concentration under the condition of the existence of liquid water 01, so that the metal base material is seriously corroded, and even a malignant safety accident of perforation leakage is caused.
To avoid this phenomenon, most of the current hydrogenation apparatuses inject liquid water 01 before the heat exchanger, and it is desirable to dissolve and flush the formed crystalline ammonium salt 13 with the injected liquid water 01 to avoid the formation of crystalline ammonium salt 13 accumulation. However, the currently used water injection method is to inject liquid water 01 into the pipeline in front of the tube pass inlet of the heat exchanger, as shown in fig. 1.
However, the hydrogenation device is under high-pressure reaction conditions, the heat exchanger is mostly a floating head type heat exchanger or a U-shaped tube type heat exchanger, and the heat exchanger with the structure type has high working pressure and can be used in high-pressure environments such as the hydrogenation device. However, since the tube side of the heat exchanger is provided with the partition plate 12 to divide the tube side into the tube side inlet 11 and the tube side outlet 14, due to the structure, after the gas-liquid mixture 04 enters from the tube side inlet 11, the liquid phase directly impacts the partition plate 12 due to inertia influence, and the liquid water 01 impacts the partition plate 12 and then is sputtered and then is distributed near the upper part of the partition plate 12. The gas phase is distributed to each heat exchange tube along with the pipeline and the end enclosure structure, that is, gas-liquid separation is generated, most of the injected liquid water 01 only flows into the heat exchange tube bundle 16 positioned at the lower part, and the heat exchange tube bundle 16 at the upper part cannot be sufficiently washed, so that the crystallized ammonium salt 13 at the inlet of the heat exchange tube bundle 16 at the upper part and the periphery is accumulated, and the problems of blockage and corrosion leakage are caused, as shown in fig. 2, the water injection effect cannot be sufficiently achieved.
Therefore, it is urgently needed to provide a gas-liquid distribution device which can change the phenomenon of nonuniform gas-liquid distribution after water is injected into the existing heat exchanger, and then the liquid water 01 injected in front of the heat exchanger is uniformly distributed to all the inlets of the heat exchange tube bundle.
Disclosure of Invention
In order to overcome the defects in the background art, the utility model provides the gas-liquid distribution device for preventing the salt corrosion of the heat exchanger, the shunt pipe in the gas-liquid distribution device can uniformly distribute the liquid water injected in front of the heat exchanger to all the inlets of the heat exchange pipe bundles, so that each heat exchange pipe bundle can be washed by the liquid water, the accident risks of blockage or scale corrosion leakage and the like caused by the accumulation of crystallized ammonium salt at the position of the inlet of the heat exchange pipe bundle are effectively avoided, and the effect of water injection and the like are fully achieved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a gas-liquid distribution device for preventing heat exchanger salt deposition corrodes, includes shunt tubes and reposition of redundant personnel hole, the shunt tubes is both ends open-ended tubular structure, and the upper portion of shunt tubes is pegged graft on the inner fringe face of heat exchanger tube side entry, and the interval is equipped with a plurality of reposition of redundant personnel holes on the outer fringe face of lower part in the shunt tubes, each reposition of redundant personnel hole is towards the heat exchanger tube bank entry of heat exchanger respectively, and the lower extreme opening orientation of shunt tubes just is close to the baffle formation of heat exchanger gas-liquid distribution device for preventing heat exchanger salt deposition corrosion.
The gas-liquid distribution device for preventing salt corrosion of the heat exchanger is characterized in that the flow dividing holes are any one of circular holes, conical holes or special-shaped holes.
The gas-liquid distribution device for preventing the salt corrosion of the heat exchanger is characterized in that when the shunting holes are round holes, the diameter of the round holes is not more than one third of the inner diameter of the shunting pipes.
The gas-liquid distribution device for preventing salt corrosion of the heat exchanger is characterized in that each shunt hole faces to the inlet of the heat exchange tube bundle in the upper middle area of the tube plate.
The gas-liquid distribution device for preventing salt corrosion of the heat exchanger is characterized in that the outer edge surface of the upper part of the shunt pipe is in interference connection with the inner edge surface of the tube pass inlet.
The gas-liquid distribution device for preventing salt corrosion of the heat exchanger is characterized in that the replacing structure of the shunt pipe comprises a pipe body and a connecting flange, the connecting flange is arranged at the upper end of the pipe body and clamped at a pipe pass inlet, and a plurality of shunt holes are formed in the outer edge surface of the middle lower part of the shunt pipe at intervals.
By adopting the technical scheme, the utility model has the following advantages:
the utility model arranges the shunt pipe on the inner edge surface of the tube pass inlet, and then arranges a plurality of shunt holes on the lower part of the shunt pipe, so that the liquid water injected in front of the heat exchanger can be uniformly distributed to all the heat exchange tube bundle inlets, each heat exchange tube bundle can be flushed with the liquid water, the accident risks of blockage or corrosion leakage under scales and the like caused by accumulation of crystallized ammonium salt at the heat exchange tube bundle inlet can be effectively avoided, and the effect of water injection and the like can be fully achieved.
Drawings
FIG. 1 is a schematic diagram of the whole water injection of the front path of a prior hydrogenation heat exchanger;
FIG. 2 is a schematic view of the portion of FIG. 1 taken from the direction A;
FIG. 3 is a schematic diagram of the structure and its application of the present invention;
FIG. 4 is a schematic cross-sectional view B-B of FIG. 3;
FIG. 5 is a schematic view of the working state of the present invention;
FIG. 6 is a schematic cross-sectional view of C-C of FIG. 5;
FIG. 7 is a schematic view of another structure and its application of the present invention;
in the figure: 01. liquid water; 02. a high temperature gas; 03. a low temperature gas; 04. a gas-liquid mixture; 11. a tube side inlet; 12. a partition plate; 13. a crystalline ammonium salt; 14. a tube side outlet; 15. a tube sheet; 16. a heat exchange tube bundle; 21. a shunt tube; 22. and a shunt hole.
Detailed Description
The present invention will be explained in more detail by the following examples, which are not intended to limit the utility model;
it should be noted that the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., used in describing the structure of the present invention are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
With reference to fig. 3-7, a gas-liquid distribution device for preventing salt corrosion of a heat exchanger comprises a shunt pipe 21 and a shunt hole 22, the shunt tube 21 is a tubular structure with openings at two ends, the upper part of the shunt tube 21 is inserted on the inner edge surface of the tube pass inlet 11 of the heat exchanger, the outer edge surface of the upper part of the shunt tube 21 is in interference connection with the inner edge surface of the tube pass inlet 11 or the upper part of the shunt tube 21 is directly welded on the inner edge surface of the tube pass inlet 11, a plurality of shunting holes 22 are arranged on the outer edge surface of the lower part of the shunting pipe 21 at intervals, the shunting holes 22 are any one of round holes, conical holes or special-shaped holes, each shunting hole 22 faces to the inlet of a heat exchange pipe bundle of the heat exchanger, namely, each diversion hole 22 faces to the inlet of the heat exchange tube bundle in the upper area in the tube plate 15, and the lower end opening of the diversion pipe 21 faces to and is close to the partition plate 12 of the heat exchanger to form the gas-liquid distribution device for preventing salt corrosion of the heat exchanger.
In specific implementation, the hole in the middle of the shunt tube 21 can be a tapered hole with a large upper end and a small lower end, i.e., the hole diameter at the upper end of the shunt tube 21 is larger than the hole diameter at the lower end of the shunt tube 21.
Referring to fig. 5 and 6, when the present invention is in a working state, liquid water 01 is injected from the opening of the front pipeline of the tube side inlet 11 of the heat exchanger, and is mixed with high-temperature gas 02 to form a gas-liquid mixture 04, after the gas-liquid mixture 04 enters the shunt tube 21, due to the guiding effect of the cylindrical structure of the shunt tube 21 and the blockage of the partition plate 12 corresponding to the outlet of the shunt tube 21 on the gas phase, the gas phase in the gas-liquid mixture 04 is suppressed, and a certain high pressure is formed inside the shunt tube 21, and then is ejected from the shunt hole 22 on the shunt tube 21. At the same time of injection, the liquid phase in the gas-liquid mixture 04 will be carried by the injected gas phase, together forming an injection of the gas-liquid mixture 04.
Preferably, the shunting holes 22 are round holes, the diameter of each round hole is not larger than one third of the inner diameter of the shunting pipe 21, the diameter of each round hole is not smaller than 1mm, and the diameter of each round hole in the range enables the gas-liquid mixture 04 to be jetted out from the shunting holes 22 at the speed of 0-5 m/s.
Since the diversion holes 22 of the diversion pipe 21 are respectively directed to different areas of the middle upper part of the inlet of the heat exchange tube bundle, the jet of the gas-liquid mixture 04 can uniformly cover the middle upper part of the inlet of the whole heat exchange tube bundle. Meanwhile, as the outlet of the shunt pipe 21 is not completely connected with the partition plate 12, part of the gas-liquid mixture 04 still flows out from the outlet of the shunt pipe 21, forms sputtering of the gas-liquid mixture 04 after impacting the partition plate 12, and then enters the lower part of the inlet of the heat exchange tube bundle. The two aspects are combined, so that the injected liquid water 01 can basically and completely cover the inlet of the heat exchange tube bundle, namely, the gas-phase high-temperature gas 02 enters the heat exchange tube 16 for heat exchange, and simultaneously, the liquid water 01 carrying the liquid phase can be used for washing the inlet of the heat exchange tube bundle, thereby avoiding the problems of blockage and corrosion leakage caused by crystallized ammonium salt.
Fig. 7 shows another embodiment of the present invention, in practical application, since the construction difficulty of adding the shunt tube 21 inside the tube side inlet 11 is large, and the bonding strength of the two layers of tubular structures after welding is reduced after long-term use, fatigue failure is generated, and the risk of dropping the shunt tube 21 is brought. Therefore, in practical implementation, the structure of the shunt tube 21 shown in fig. 7 can be adopted, that is, an alternative structure of the shunt tube 21 is that the shunt tube 21 includes a tube body and a connecting flange, the connecting flange is provided at the upper end of the tube body to form an integral structure, the connecting flange is clamped at the tube side inlet 11 to form a flange-clamping type installation form, and a plurality of shunt holes 22 are provided at intervals on the outer edge surface of the middle lower part of the shunt tube 21. In the implementation process, the connecting flange can be a wafer type flange cover, and the connecting flange and the pipe body are integrally manufactured and then integrally placed into the pipe pass inlet 11.
The utility model is suitable for the occasions of corrosion leakage caused by salt deposition at the inlet of the heat exchange tube bundle due to uneven gas-liquid distribution of the existing heat exchanger, and is also suitable for the scaling corrosion positions of other similar heat exchangers.
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the utility model, are presently considered to be suitable, it being understood, however, that the utility model is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the utility model.
Claims (6)
1. The utility model provides a gas-liquid distribution device for preventing heat exchanger salt deposit corrodes which characterized by: including shunt tubes (21) and reposition of redundant personnel hole (22), shunt tubes (21) are both ends open-ended tubular structure, and the upper portion of shunt tubes (21) is pegged graft on the inner fringe face of heat exchanger tube side entry (11), and the interval is equipped with a plurality of reposition of redundant personnel holes (22) on the outer fringe face of lower part in shunt tubes (21), each reposition of redundant personnel hole (22) are respectively towards the heat exchanger tube bank entry of heat exchanger, and baffle (12) that the lower extreme opening orientation of shunt tubes (21) just is close to the heat exchanger form the gas-liquid distribution device that is used for preventing heat exchanger salt deposition corrosion.
2. The gas-liquid distribution device for preventing salt corrosion of a heat exchanger according to claim 1, wherein: the shunting holes (22) are any one of round holes, tapered holes or special-shaped holes.
3. The gas-liquid distribution device for preventing salt corrosion of a heat exchanger according to claim 1, wherein: when the shunt hole (22) is a round hole, the diameter of the round hole is not more than one third of the inner diameter of the shunt pipe (21).
4. The gas-liquid distribution device for preventing salt corrosion of a heat exchanger according to claim 1, wherein: the diversion holes (22) are respectively towards the inlet of the heat exchange tube bundle in the upper area in the tube plate (15).
5. The gas-liquid distribution device for preventing salt corrosion of a heat exchanger according to claim 1, wherein: the outer edge surface of the upper part of the shunt pipe (21) is in interference connection with the inner edge surface of the pipe pass inlet (11).
6. The gas-liquid distribution device for preventing salt corrosion of a heat exchanger according to claim 1, wherein: the replacement structure of shunt tubes (21) includes body and flange for shunt tubes (21) the upper end of body is equipped with flange, flange joint is equipped with a plurality of reposition of redundant personnel holes (22) at the interval on shunt tubes (21) middle and lower part's outer fringe face in tube side entry (11) department.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122720454.4U CN216081142U (en) | 2021-11-09 | 2021-11-09 | Gas-liquid distribution device for preventing salt corrosion of heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122720454.4U CN216081142U (en) | 2021-11-09 | 2021-11-09 | Gas-liquid distribution device for preventing salt corrosion of heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN216081142U true CN216081142U (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122720454.4U Withdrawn - After Issue CN216081142U (en) | 2021-11-09 | 2021-11-09 | Gas-liquid distribution device for preventing salt corrosion of heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865409A (en) * | 2021-11-09 | 2021-12-31 | 洛阳德明石化设备有限公司 | A gas-liquid distribution device for preventing salt corrosion of heat exchangers |
-
2021
- 2021-11-09 CN CN202122720454.4U patent/CN216081142U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865409A (en) * | 2021-11-09 | 2021-12-31 | 洛阳德明石化设备有限公司 | A gas-liquid distribution device for preventing salt corrosion of heat exchangers |
| CN113865409B (en) * | 2021-11-09 | 2025-06-24 | 洛阳德明石化设备有限公司 | A gas-liquid distribution device for preventing salt corrosion in heat exchangers |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A gas-liquid distribution device for preventing salt corrosion in heat exchangers Granted publication date: 20220318 Pledgee: Zhongyuan bank Limited by Share Ltd. Luoyang branch Pledgor: LUOYANG DEMING PETRIFACTION EQUIPMENT CO.,LTD. Registration number: Y2025980009469 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20220318 Effective date of abandoning: 20250624 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20220318 Effective date of abandoning: 20250624 |