CN110748493A - Centrifugal compressor for diesel oil hydrogenation modification device - Google Patents
Centrifugal compressor for diesel oil hydrogenation modification device Download PDFInfo
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- CN110748493A CN110748493A CN201810808897.9A CN201810808897A CN110748493A CN 110748493 A CN110748493 A CN 110748493A CN 201810808897 A CN201810808897 A CN 201810808897A CN 110748493 A CN110748493 A CN 110748493A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a diesel oil hydrogenation is centrifugal compressor for upgrading device, mainly comprises stator group (casing, baffle, balance disc seal, the mouth circle is sealed, end cover etc.), rotor group (main shaft, impeller, spacer, balance disc etc.), bearing group (support bearing, thrust bearing), dry gas seal etc. its characterized in that: (1) the compressor adopts multi-stage high pressure and adopts a vertical subdivision structure; (2) the compressor is arranged in the main shaft direction in a row for the impellers, and a gas cooler is not arranged in the middle; (3) the partition plates at all levels are sequentially and tightly connected together by pull rod bolts to form a partition plate bundle, and the outlet partition plate is fixed on the end cover by a seam allowance and a bolt handle; (4) the support bearing adopts a tilting pad bearing, and two sides of the main shaft adopt the same structure; (5) the thrust bearing is of a Kingsburley type; (6) the dry gas is hermetically arranged at two ends of the compressor and is provided with an independent control system.
Description
Technical Field
The invention belongs to the technical field of petrochemical industry, and particularly relates to a centrifugal compressor matched with a diesel hydro-upgrading device.
Background
Under the great situation of developing low-carbon economy, recycling economy and realizing sustainable development, the requirements on the aromatic hydrocarbon content and the cetane number in diesel oil in new environmental protection laws and regulations are more and more strict. Obviously, the poor diesel oil component can not meet the market requirement. Therefore, upgrading diesel fuel and improving the quality of diesel fuel become the current primary task.
The cetane number of the diesel oil depends on chemical components, and the aromatic hydrocarbon, particularly the polycyclic aromatic hydrocarbon, has the lowest cetane number, so that the reduction of the aromatic hydrocarbon content and the increase of the cetane number can be simultaneously realized for poor diesel oil. Hydrogenation modification is one of the effective means for reducing the content of aromatic hydrocarbon in diesel oil at present, polycyclic aromatic hydrocarbon is saturated to generate monocyclic aromatic hydrocarbon under the action of hydrogen and a catalyst, and the cetane number of the diesel oil is improved.
The diesel oil is hydrogenated and modified mainly by carrying out desulfurization, denitrification, deoxidation, olefin saturation and aromatic hydrocarbon saturation on the oil product to remove metal box asphalt impurities and the like, so that the odor, the color and the stability of the oil product are improved, clothes are prevented, the quality of the oil product is further improved, and the use requirement of environmental protection on the oil product is met.
Chinese patent application 201210367165.3 discloses a method for reforming heavy diesel fuel, which does not relate to the structure of the compressor itself, the function of the compressor itself and how to adapt it to the catalytic reforming process. In order to be suitable for the diesel hydro-upgrading process, a recycle hydrogen compressor is required to be designed and modeled automatically.
Disclosure of Invention
The invention aims to meet the special process requirements of diesel hydro-upgrading, and develops a centrifugal compressor for diesel hydro-upgrading, namely a special recycle hydrogen compressor.
The invention relates to a centrifugal compressor for a diesel hydro-upgrading device, which mainly comprises a stator group (a shell, a clapboard, a balance disc seal, a mouth ring seal, an end cover and the like), a rotor group (a main shaft, an impeller, a spacer bush, a balance disc and the like), a bearing group (a support bearing, a thrust bearing), a dry gas seal and the like, and is characterized in that:
(1) the compressor adopts multi-stage high pressure and adopts a vertical subdivision structure;
(2) the compressor is arranged in the main shaft direction in a row for the impellers, and a gas cooler is not arranged in the middle;
(3) the partition plates at all levels are sequentially and tightly connected together by pull rod bolts to form a partition plate bundle, and the outlet partition plate is fixed on the end cover by a seam allowance and a bolt handle;
(4) the support bearing adopts a tilting pad bearing, and two sides of the main shaft adopt the same structure;
(5) the thrust bearing is of a Kingsburley type;
(6) the dry gas is hermetically arranged at two ends of the compressor and is provided with an independent control system.
Because the gas acting force on the two sides of each stage of impeller is inconsistent, the rotor is subjected to axial force. The balance disk is arranged on the side with high pressure, and the axial force can be balanced by the pressure difference of gas on two sides of the balance disk.
The centrifugal compressor for the diesel hydro-upgrading device, the supporting bearing and the thrust bearing play a role in manufacturing the rotor of the compressor, and the size of the manufactured span has a decisive role in the performance of the compressor. The thrust bearing is used for balancing the residual axial thrust to ensure the stable operation of the compressor.
In the centrifugal compressor for the diesel hydro-upgrading device, the step type labyrinth seal is adopted as the opening ring seal used at the impeller cover.
Drawings
FIG. 1 is an overall sectional view of a centrifugal compressor for a diesel hydro-upgrading device according to the present invention;
FIG. 2 is a sectional view of a stator assembly of a centrifugal compressor for a diesel hydro-upgrading device according to the present invention;
FIG. 3 is a rotor diagram of a centrifugal compressor for a diesel hydro-upgrading device according to the present invention;
FIG. 4 shows the seal of the opening ring used at the wheel cap of the centrifugal compressor for the diesel hydro-upgrading device of the present invention.
In the above figures: 1 stator group, 2 rotor group, 3 bearing group, 4 dry gas sealing group, 5 machine shell, 6 left end cover, 7 right end cover, 8 partition board, 9 air inlet cylinder, 10 air outlet cylinder, 11 sealing, 12 impeller, 13 main shaft, 14 spacer bush, 15 balance disc, 16 lock nut, 17 thrust disc, 18 adjusting valve, 19 stop valve, 20 labyrinth sealing and 21 wheel cover.
Detailed Description
The centrifugal compressor for the diesel hydro-upgrading device of the invention is further explained and supplemented with the attached drawings.
As shown in fig. 1, the centrifugal compressor for a diesel hydro-upgrading device of the present invention includes four main groups, i.e., a stator group 1, a rotor group 2, a bearing group 3, and a dry gas seal group 4.
As shown in FIG. 2, the stator set of the centrifugal compressor for diesel hydro-upgrading device of the present invention is a cross-sectional view, and the stator set comprises a casing 5, a left end cover 6, a right end cover 7, a partition plate 8, an air inlet barrel 9, an air outlet barrel 10 and a seal 11. The vertically split partition plates of the compressor are connected together through pull rod bolts to form an 8-partition-plate bundle, and the end covers at the two sides of the 5-cylinder are fastened through bolts. The separator bundle is installed in the 5 cylinders through a special separator tool, then the left end cover 6 and the right end cover 7 are combined with the 5 cylinders through bolts, the air inlet cylinder 9 and the air outlet cylinder 10 are welded below the cylinders, and other parts are sequentially installed on the end covers to form a complete 1-stator group.
As shown in figure 3, the rotor diagram of the centrifugal compressor for the diesel hydro-upgrading device of the invention, the 12 impellers on the rotor of the invention are sequentially arranged on the 13 main shafts as shown in the figure, the impellers are positioned by 14 spacer bushes, 15 balance discs are arranged behind the 12 impellers arranged in sequence, the position of the impeller on the rotor is fixed by a 16 locking nut, and a 17 thrust disc, an 18 adjusting pad and a 19 stop ring are sequentially arranged on the 13 main shafts according to the rotor diagram to form a complete rotor group.
As shown in fig. 4, the centrifugal compressor for a diesel hydro-upgrading device of the present invention uses a 20-step labyrinth seal at an impeller end cover. The sealing is usually used at the wheel cover and the balance disc of the 21-impeller, and as the flow rate and the pressure drop of the gas become larger and larger, the gas does not flow out continuously when the pressure drops to approximate back pressure, so that the sealing of the gas is realized.
The parameters of the centrifugal compressor for a diesel hydro-upgrading device according to the present invention will be further described below with reference to specific examples.
EXAMPLE 1 centrifugal compressor for Diesel hydro-upgrading device
The embodiment 1 is an eight-stage centrifugal compressor, eight impellers are arranged in sequence, the impellers are binary closed impellers with the diameter of 400mm, and blades of the impellers are in a backward bending structure; the mouth ring seal adopts a smooth labyrinth seal. This example does not provide steam conditions on site, so this embodiment takes the form of a motor coupled to a gearbox coupled to a compressor.
EXAMPLE 2 centrifugal compressor for Diesel hydro-upgrading device
The example 2 is a seven-stage centrifugal compressor, seven impellers are arranged in sequence, the impellers are binary closed impellers with the diameter of 400mm, the blades of the impellers are in a backward bending structure, and the mouth ring seal is a smooth labyrinth seal. Steam conditions are provided according to customer site conditions, so this embodiment employs turbine drive.
EXAMPLE 3 centrifugal compressor for Diesel hydro-upgrading device
The embodiment 3 is a six-stage centrifugal compressor, six impellers are arranged in sequence, the impellers are binary closed impellers with the diameter of 400mm, blades of the impellers are of a backward bending type structure, and a mouth ring seal is a smooth labyrinth seal. Steam conditions are provided according to customer site conditions, so this embodiment employs turbine drive.
The above embodiments are merely design solutions proposed according to different requirements of the whole set of diesel hydro-upgrading device process, and the above solutions are embodiments of centrifugal compressors for gasoline hydro-upgrading devices operated on site for different users, and the present invention is not limited to the above four embodiments. It will be understood by those skilled in the art that various changes and modifications may be made in the form of the invention without departing from the spirit and scope of the invention.
Claims (1)
1. The utility model provides a diesel oil hydrogenation is centrifugal compressor for upgrading device, mainly comprises stator group (casing, baffle, balance disc seal, the mouth circle is sealed, end cover etc.), rotor group (main shaft, impeller, spacer, balance disc etc.), bearing group (support bearing, thrust bearing), dry gas seal etc. its characterized in that:
(1) the compressor adopts multi-stage high pressure and adopts a vertical subdivision structure;
(2) the compressor is arranged in the main shaft direction in a row for the impellers, and a gas cooler is not arranged in the middle;
(3) the partition plates at all levels are sequentially and tightly connected together by pull rod bolts to form a partition plate bundle, and the outlet partition plate is fixed on the end cover by a seam allowance and a bolt handle;
(4) the support bearing adopts a tilting pad bearing, and two sides of the main shaft adopt the same structure;
(5) the thrust bearing is of a Kingsburley type;
(6) the dry gas is hermetically arranged at two ends of the compressor and is provided with an independent control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810808897.9A CN110748493A (en) | 2018-07-23 | 2018-07-23 | Centrifugal compressor for diesel oil hydrogenation modification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810808897.9A CN110748493A (en) | 2018-07-23 | 2018-07-23 | Centrifugal compressor for diesel oil hydrogenation modification device |
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| Publication Number | Publication Date |
|---|---|
| CN110748493A true CN110748493A (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810808897.9A Pending CN110748493A (en) | 2018-07-23 | 2018-07-23 | Centrifugal compressor for diesel oil hydrogenation modification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236582A (en) * | 2021-01-25 | 2021-08-10 | 沈阳斯特机械制造有限公司 | Centrifugal compressor with water injection system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013047507A1 (en) * | 2011-09-28 | 2013-04-04 | 三菱重工コンプレッサ株式会社 | Rotation mechanism and internal unit of rotation mechanism |
| US20160222981A1 (en) * | 2013-09-05 | 2016-08-04 | Nuovo Pignone Srl | Multistage centrifugal compressor |
| CN106460863A (en) * | 2014-05-26 | 2017-02-22 | 诺沃皮尼奥内股份有限公司 | Extracting dry gas from a wet-gas compressor |
| CN107191387A (en) * | 2017-07-06 | 2017-09-22 | 沈阳透平机械股份有限公司 | A kind of centrifugal compressor of big support span |
| CN107237764A (en) * | 2017-08-08 | 2017-10-10 | 内蒙古鄂尔多斯联合化工有限公司 | A kind of air compressor machine expands can equipment |
| CN207349129U (en) * | 2017-09-19 | 2018-05-11 | 沈阳斯特机械制造有限公司 | A kind of gasoline and diesel hydrogenation modifying apparatus centrifugal compressor |
-
2018
- 2018-07-23 CN CN201810808897.9A patent/CN110748493A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013047507A1 (en) * | 2011-09-28 | 2013-04-04 | 三菱重工コンプレッサ株式会社 | Rotation mechanism and internal unit of rotation mechanism |
| US20160222981A1 (en) * | 2013-09-05 | 2016-08-04 | Nuovo Pignone Srl | Multistage centrifugal compressor |
| CN106460863A (en) * | 2014-05-26 | 2017-02-22 | 诺沃皮尼奥内股份有限公司 | Extracting dry gas from a wet-gas compressor |
| CN107191387A (en) * | 2017-07-06 | 2017-09-22 | 沈阳透平机械股份有限公司 | A kind of centrifugal compressor of big support span |
| CN107237764A (en) * | 2017-08-08 | 2017-10-10 | 内蒙古鄂尔多斯联合化工有限公司 | A kind of air compressor machine expands can equipment |
| CN207349129U (en) * | 2017-09-19 | 2018-05-11 | 沈阳斯特机械制造有限公司 | A kind of gasoline and diesel hydrogenation modifying apparatus centrifugal compressor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236582A (en) * | 2021-01-25 | 2021-08-10 | 沈阳斯特机械制造有限公司 | Centrifugal compressor with water injection system |
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Application publication date: 20200204 |
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