CN203335138U - Nitric acid tail gas expansion machine - Google Patents
Nitric acid tail gas expansion machine Download PDFInfo
- Publication number
- CN203335138U CN203335138U CN2013202674616U CN201320267461U CN203335138U CN 203335138 U CN203335138 U CN 203335138U CN 2013202674616 U CN2013202674616 U CN 2013202674616U CN 201320267461 U CN201320267461 U CN 201320267461U CN 203335138 U CN203335138 U CN 203335138U
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- China
- Prior art keywords
- rotor
- nitric acid
- tail gas
- bearing
- acid tail
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- Expired - Lifetime
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Abstract
The utility model discloses a nitric acid tail gas expansion machine which comprises a shell, a rotor and an inner shell body. The shell is provided with a gas inlet and a gas vent. The rotor is provided with a gas inlet end and a gas outlet end. The gas inlet end and the gas outlet end of the rotor are respectively provided with a shaft seal. A moving blade is arranged on the rotor. The inner shell body is mounted in the shell and provided with a stationary blade. The gas inlet and the gas vent are arranged on the upper portion and the lower portion of the shell respectively. The moving blade and the stationary blade are both compound lean blades. The gas inlet end and the gas outlet end of the rotor are respectively supported by a radial bearing. The shaft seal arranged at the gas inlet end of the rotor comprises a stepped honeycomb seal and a carbon ring seal. The shaft seal arranged at the gas outlet end of the rotor is a stepped honeycomb seal. The nitric acid tail gas expansion machine improves recovery efficiency, enhances system capacity, reduces the number of parts, reduces overall weight, and improves the sealing effect of the shaft seals of the rotor.
Description
Technical field
The utility model relates to decompressor.
Background technique
The working procedure of nitric acid tail gas decompressor is, the High Temperature High Pressure nitric acid tail gas that oxidation furnace produces enters decompressor through pipeline, the drive rotor High Rotation Speed, and expansion machine rotor directly connects by diaphragm coupling with the air compressing machine rotor, thus the driving air compressor.Existing nitric acid tail gas decompressor mainly has following shortcoming:
1. the pneumatic design of existing nitric acid tail gas decompressor adopts the dynamic and static leaf of uniform section blade profile usually, and has stator blade and the bad situation of movable vane match condition.Though this design has reduced the workload of pneumatic design, from the air current flow angle, flow field is not optimized, thereby causes pneumatic efficiency lower, and then has affected the system production capacity; In addition, because can causing the working life of blade, the load irrational distribution significantly shortens;
2. existing nitric acid tail gas decompressor adopts axial admission usually, causes the axial length of decompressor longer, and floor space is also larger;
3. the rotor of existing nitric acid tail gas decompressor is cantilever structure, in order to reach balance, balance hub must be set, and causes rotor weight greatly to increase;
4. the shaft seal of rotor adopts labyrinth seal or honeycomb seal, although labyrinth seal is simple in structure, processing cost is lower, and sealing effect is undesirable.Honeycomb seal is due to the decompressor housing for a long time under high temperature condition, and housing distortion is more general, can cause sealing effect to descend.In addition, labyrinth seal and honeycomb seal all belong to noncontact seal, and seal clearance is had to very high requirement, once seal clearance off-design state, sealing effect will reduce greatly.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the above-mentioned shortcoming that prior art exists, and provides a kind of pneumatic efficiency and regenerative power high and then can increase the nitric acid tail gas decompressor of system production capacity.
The nitric acid tail gas decompressor that provides a kind of floor space little is provided another technical problem to be solved in the utility model.
A technical problem more to be solved in the utility model is to provide a kind of nitric acid tail gas decompressor of good sealing effect of lightweight, rotor.
The technological scheme that the utility model adopts is: a kind of nitric acid tail gas decompressor comprises casing, rotor and inner housing; Casing is provided with suction port and relief opening; Rotor has inlet end and outlet side, and inlet end and the outlet side of this rotor are equipped with shaft seal, and movable vane is set on rotor; Inner housing is arranged in casing, and this inner housing is provided with stator blade; Be characterized in, movable vane and stator blade are the composite bent twisted blade.
The beneficial effect that the utility model reaches is:
1. the dynamic and static blade of sour off-gas expander of the present utility model all adopts the composite bent twisted blade, adopted high enthalpy drop profile, make air-flow can reach optimized in blade different heights cross section and flow, thereby improved nitric acid tail gas decompressor regenerative power, increased the system production capacity.In addition, this dynamic and static impeller structure can also be realized the minimizing of impeller progression, thereby reduces the fault point, and has improved the reliability of equipment;
2. nitric acid tail gas decompressor of the present utility model adopts radial air inlet, and radially the structural type of exhaust, reduced number of spare parts and floor space;
3. the rotor of the utility model nitric acid tail gas decompressor adopts the mode of two end supports, without balance hub is set, can significantly reduce rotor weight.Simultaneously, because impeller progression reduces, further reduced rotor weight, improved rotating stability, also reduced bearing load, reduced the bearing power consumption simultaneously;
4. the utility model nitric acid tail gas decompressor adopts the polytype combination seal, has greatly improved sealing effect, has reduced the tail gas leakage.In the utility model, the inlet end of rotor, except adopting the cascade honeycomb seal, has also added carbon ring seal.Carbon ring seal belongs to contact seal, and unique carbocyclic ring structural type makes carbocyclic ring in the situation that wearing and tearing can realize auto-compensation, thereby guarantee sealing effect.
The accompanying drawing explanation
Fig. 1 is an embodiment's of the utility model nitric acid tail gas decompressor structural representation.
Fig. 2 is the local enlarged diagram of the rotor inlet end shaft seal of the utility model nitric acid tail gas decompressor.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Inlet end and the outlet side of rotor 3 are equipped with shaft seal.The shaft seal that is arranged on the rotor inlet end comprises cascade honeycomb seal 61 and carbon ring seal 62, and wherein, carbon ring seal 62 is near the first radial bearing 41, and cascade honeycomb seal 61 is near expansion chamber.The shaft seal that is arranged on the rotor outlet side is cascade honeycomb seal 63.Preferably, the honeycomb that is arranged on the cascade honeycomb seal of rotor inlet end and outlet side is regular hexagon.The carbocyclic ring of carbon ring seal 62 adopts three lobe overlap joint type structures.Be filled with isolation gas between the multilayer carbocyclic ring, control by differential pressure, the isolation atmospheric pressure, all the time higher than tail gas pressure, forms the shutoff to tail gas, has further improved sealing effect.
Claims (8)
1. a nitric acid tail gas decompressor, comprise casing, rotor and inner housing; Described casing is provided with suction port and relief opening; Described rotor has inlet end and outlet side, and inlet end and the outlet side of this rotor are equipped with shaft seal, and movable vane is set on rotor; Described inner housing is arranged in described casing, and this inner housing is provided with stator blade; It is characterized in that, described movable vane and described stator blade are the composite bent twisted blade.
2. nitric acid tail gas decompressor as claimed in claim 1, is characterized in that, described suction port is arranged on the top of described casing, and described relief opening is arranged on the below of described casing.
3. nitric acid tail gas decompressor as claimed in claim 1, is characterized in that,
Described casing comprises clutch shaft bearing case and the second bearing housing;
The inlet end of described rotor is supported by the first radial bearing, and exhaust end is supported by the second radial bearing;
Described the first radial bearing is arranged in the clutch shaft bearing case, and described the second radial bearing is arranged in the second bearing housing.
4. nitric acid tail gas decompressor as claimed in claim 3, is characterized in that, the inlet end of described rotor also is arranged with main thrust bearings and secondary thrust-bearing, and described main thrust bearings and secondary thrust-bearing are positioned at the outside of described the first radial bearing; This main thrust bearings and secondary thrust-bearing are installed in described clutch shaft bearing case.
5. nitric acid tail gas decompressor as claimed in claim 3, is characterized in that, described the first radial bearing and the second radial bearing are tilting-pad bearing.
6. nitric acid tail gas decompressor as claimed in claim 3, is characterized in that, the shaft seal that is arranged on the rotor inlet end comprises cascade honeycomb seal and carbon ring seal, and wherein, described carbon ring seal is near described the first radial bearing;
The shaft seal that is arranged on the rotor outlet side is the cascade honeycomb seal.
7. nitric acid tail gas decompressor as claimed in claim 6, is characterized in that, the honeycomb that is arranged on the cascade honeycomb seal of rotor inlet end and outlet side is regular hexagon.
8. nitric acid tail gas decompressor as claimed in claim 6, is characterized in that, the carbocyclic ring of described carbon ring seal adopts three lobe overlap joint type structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202674616U CN203335138U (en) | 2013-05-16 | 2013-05-16 | Nitric acid tail gas expansion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202674616U CN203335138U (en) | 2013-05-16 | 2013-05-16 | Nitric acid tail gas expansion machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203335138U true CN203335138U (en) | 2013-12-11 |
Family
ID=49703816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202674616U Expired - Lifetime CN203335138U (en) | 2013-05-16 | 2013-05-16 | Nitric acid tail gas expansion machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203335138U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791028A (en) * | 2015-04-22 | 2015-07-22 | 上海成航涡轮技术有限公司 | Flue gas turbine supported through two ends |
| CN110608075A (en) * | 2019-09-16 | 2019-12-24 | 西安陕鼓动力股份有限公司 | Nitric acid device energy recuperation unit |
-
2013
- 2013-05-16 CN CN2013202674616U patent/CN203335138U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791028A (en) * | 2015-04-22 | 2015-07-22 | 上海成航涡轮技术有限公司 | Flue gas turbine supported through two ends |
| CN110608075A (en) * | 2019-09-16 | 2019-12-24 | 西安陕鼓动力股份有限公司 | Nitric acid device energy recuperation unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Song Guiliang Inventor after: Chen Yong Inventor after: Wu Jiahu Inventor after: Zhang Shicheng Inventor after: Zhang Xianyu Inventor before: Song Guiliang Inventor before: Chen Yong Inventor before: Wu Jiahu Inventor before: Zhang Shicheng Inventor before: Zhang Xianyu |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151112 Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Building 1 room 629 Patentee after: SHANGHAI QIYAO HEAVY INDUSTRY CO.,LTD. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: Shanghai Marine Diesel Engine Research Institute |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151224 Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee after: Shanghai Marine Diesel Engine Research Institute Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Building 1 room 629 Patentee before: SHANGHAI QIYAO HEAVY INDUSTRY CO.,LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |