CN112228360A - Reforming circulating hydrogen compressor - Google Patents

Reforming circulating hydrogen compressor Download PDF

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Publication number
CN112228360A
CN112228360A CN202011082657.9A CN202011082657A CN112228360A CN 112228360 A CN112228360 A CN 112228360A CN 202011082657 A CN202011082657 A CN 202011082657A CN 112228360 A CN112228360 A CN 112228360A
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CN
China
Prior art keywords
impeller
blades
impellers
compressor
seal
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011082657.9A
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Chinese (zh)
Inventor
孙忠良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang Site Machinery Manufacturing Co ltd
Original Assignee
Shenyang Site Machinery Manufacturing Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenyang Site Machinery Manufacturing Co ltd filed Critical Shenyang Site Machinery Manufacturing Co ltd
Priority to CN202011082657.9A priority Critical patent/CN112228360A/en
Publication of CN112228360A publication Critical patent/CN112228360A/en
Pending legal-status Critical Current

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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
    • F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
    • 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
    • F04D29/051—Axial thrust balancing
    • 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
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • F04D29/286—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors multi-stage rotors
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A reforming cycle hydrogen compressor, characterized in that: (1) a plurality of sets of partition plates of the compressor are assembled together to form a partition plate bundle, and a main diffuser, a curve and a reflux device through which compressed gas of the compressor flows are naturally formed after the partition plate bundle is formed; (2) the diameter of the impellers arranged on the rotor set is 600-900 mm, and the number of the impellers is 6-8. The impellers are arranged on the main shaft in a sequential manner, and the balance disc is arranged on one side. (3) The diameters of the outlets of the front impeller and the rear impeller are the same, the diameters of the inlets are different, the front impeller and the rear impeller are different in the form of impeller blades, the impeller blades in front of the balance disc and the impeller blades behind the balance disc are different, and the blades of the rear impeller are arranged between the two adjacent impellers and deflect a certain angle relative to the blades of the front impeller; (4) the supporting bearing adopts a tilting pad bearing, the thrust bearing adopts a Kimberley type, and in order to ensure the stress condition, the two sides of the thrust bearing adopt the same structure. (5) The interstage seal and the port ring are hermetically arranged on the corresponding partition plates, and the shaft end seal and the dry gas seal are arranged on the left end cover and the right end cover of the unit.

Description

Reforming circulating hydrogen compressor
Technical Field
The invention relates to the technical field of compressor equipment, in particular to a reforming recycle hydrogen compressor.
Background
Hydrogen is a main industrial raw material, is also the most important industrial gas and special gas, and has wide application in the fields of petrochemical industry, electronic industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace and the like.
Continuous reforming is a secondary petroleum processing technology, the processed raw materials mainly comprise low-octane straight-run naphtha, hydrogenated naphtha and the like, a catalyst is utilized to cause molecules to be rearranged and isomerized at the high temperature of about 500 ℃, the yield of aromatic hydrocarbon is increased, and the octane number of gasoline is improved.
The byproduct of catalytic reforming is hydrogen, a large amount of hydrogen can be generated in the early stage of reaction, macromolecular alkane can be broken into lighter alkane and low molecular gas in the hydrocracking reaction process, the liquid yield can be reduced, hydrogen is consumed, the reaction is exothermic, a large amount of hydrogen needs to be consumed in the reaction process, and the coking reaction is easily generated due to uneven partial pressure in the processes of temperature rise and pressure rise.
Disclosure of Invention
The invention seeks a reforming recycle hydrogen compressor to meet the special requirements of the continuous reforming process.
The reforming circulating hydrogen compressor comprises four parts, namely a stator group, a rotor group, a bearing group, a sealing group and the like, wherein the stator group comprises a cylinder body, a left end cover, a right end cover, a partition plate, an air inlet cylinder and an air outlet cylinder; the rotor set comprises an impeller, a main shaft, a spacer bush, a balance disc, a thrust disc, a nut, an adjusting pad and a stop ring; the bearing group comprises two supporting bearings and a thrust bearing; the seal assembly comprises an interstage seal, a mouth ring seal, a balance disc seal, a shaft end seal and a dry gas seal, and is characterized in that:
(1) a plurality of sets of partition plates of the compressor are assembled together to form a partition plate bundle, and a main diffuser, a curve and a reflux device through which compressed gas of the compressor flows are naturally formed after the partition plate bundle is formed;
(2) the diameter of the impellers arranged on the rotor set is 600-900 mm, and the number of the impellers is 6-8. The impellers are arranged on the main shaft in a sequential manner, and the balance disc is arranged on one side.
(3) The diameters of the outlets of the front impeller and the rear impeller are the same, the diameters of the inlets are different, the front impeller and the rear impeller are different in the form of impeller blades, the impeller blades in front of the balance disc and the impeller blades behind the balance disc are different, and the blades of the rear impeller are arranged between the two adjacent impellers and deflect a certain angle relative to the blades of the front impeller;
(4) the supporting bearing adopts a tilting pad bearing, the thrust bearing adopts a Kimberley type, and in order to ensure the stress condition, the two sides of the thrust bearing adopt the same structure.
(5) The interstage seal and the port ring are hermetically arranged on the corresponding partition plates, and the shaft end seal and the dry gas seal are arranged on the left end cover and the right end cover of the unit.
The invention relates to a reforming cycle hydrogen compressor, wherein the diffuser can be divided into a vane diffuser and a vaneless diffuser, and the vane diffuser can be adjusted according to the design data of a unit given by a user to meet the requirements of the user under the condition of better performance of the compressor after model selection.
The reforming circulating hydrogen compressor of the invention, between two adjacent impellers of the impeller, the blade of the latter impeller is arranged to deflect a certain angle relative to the blade of the former impeller; for the backward curved blade: 5-15 degrees; for forward curved blades: 5-15 degrees; the angle of the radial blade is 5-30 degrees.
The reforming circulating hydrogen compressor has the advantages that the arrangement form of the impellers on the main shaft is in parallel arrangement, and the arrangement form of the balance disc on one side can effectively reduce the axial thrust generated by gas on the rotor, so that the whole set of unit can run more stably.
The reforming circulating hydrogen compressor comprises a support bearing and a thrust bearing, wherein the support bearing plays a role in supporting a rotor of the compressor, the size of a support span has a decisive role in the performance of the compressor, and the thrust bearing is used for balancing axial thrust generated by the rotor of the compressor so as to ensure the stable operation of the compressor.
The reforming recycle hydrogen compressor can improve the temperature distribution in the reactor and plays a role of a heat carrier; inhibit coke-forming reaction and protect the activity life of the catalyst.
Drawings
Fig. 1 is an overall sectional view of a reforming cycle hydrogen compressor of the present invention;
fig. 2 is a sectional view of a stator pack of the reforming cycle hydrogen compressor of the present invention.
Detailed Description
The reforming recycle hydrogen compressor of the present invention will be further described and supplemented with reference to the accompanying drawings.
As shown in fig. 1, the reforming cycle hydrogen compressor of the present invention includes four main groups, i.e., a 1 stator group, a 2 rotor group, a 3 bearing group, and a 4 seal group.
Fig. 2 is a cross-sectional view of a stator assembly of the reformed recycle hydrogen compressor of the present invention, wherein the stator assembly comprises 11 cylinders, 12 left end caps, 13 right end caps, 14 partition plates, 15 air inlet cylinders, and 16 air outlet cylinders. A plurality of partition plates of the compressor are connected together through pull rod bolts to form a partition plate part 14, the partition plate part is installed in a cylinder body 11 through a special partition plate tool, a left end cover 12 and a right end cover 13 are combined with the cylinder body 11 through bolts, an air inlet cylinder 15 and an air outlet cylinder 16 are welded below the cylinder body, and other parts are sequentially installed on the end covers to form the complete stator group 1.
The parameters of the reforming recycle hydrogen compressor of the present invention will be further described and supplemented by specific examples.
Example 1 steam turbine driven reforming recycle hydrogen compressor
The embodiment 1 is a seven-stage centrifugal compressor, wherein an impeller adopts a ternary plus binary closed impeller, and blades of the ternary plus binary closed impeller adopt a forward-bent structure; the diameter of each blade is 600mm, the number of the impellers is 8, the latter impeller deflects 15 degrees relative to the former impeller, and the diffuser adopts a vaned diffuser. Steam conditions are provided according to customer site conditions, so this embodiment employs turbine drive.
Example 2 steam turbine driven reforming recycle hydrogen compressor
The embodiment 2 is an eight-stage centrifugal compressor, wherein an impeller adopts a ternary plus binary closed impeller, and blades of the ternary plus binary closed impeller adopt a forward-bent structure; the diameter of each blade is 800mm, the number of the impellers is 6, and a diffuser with blades is adopted by the rear impeller which deflects 5 degrees relative to the diffuser with the front impeller. Steam conditions are provided according to customer site conditions, so this embodiment employs turbine drive.
Example 3 Motor driven reforming recycle Hydrogen compressor
The embodiment 3 is a seven-stage centrifugal compressor, wherein an impeller adopts a closed impeller, the impeller adopts a binary structure, blades of the impeller adopt a radial structure, the diameter of the impeller is 700mm, the number of the impellers is 7, and the blades of the front impeller and the rear impeller deflect by 15 degrees; vaneless diffusers are used. The steam condition is not available to the user on site, so the set of reforming device adopts a mode that a motor is connected with a gearbox and a compressor is connected.
Example 4 Motor driven reforming recycle Hydrogen compressor
In this embodiment 4, a reforming recycle hydrogen compressor driven by a motor is arranged on one side of the motor, and the compressor is in the form of the motor, a gear box and the compressor, the diameter of an impeller of the compressor is 800mm, the number of the impellers is 6, the impeller adopts a binary closed impeller, blades of the binary closed impeller adopt a radial structure, and the blades of the front impeller and the rear impeller deflect by 5 degrees; vaneless diffusers are used.
Example 5 steam turbine driven reforming recycle hydrogen compressor
The embodiment 5 is a seven-stage centrifugal compressor, wherein an impeller adopts a binary closed impeller, blades of the impeller adopt a backward bending structure, the diameter of the impeller is 700mm, the number of the impellers is 6, and the blades of the front impeller and the rear impeller deflect by 10 degrees; the diffuser adopts a vaned diffuser. Steam conditions are provided according to customer site conditions, so this embodiment employs turbine drive.
Example 6 steam turbine driven reforming recycle hydrogen compressor
The embodiment 6 is an eight-stage centrifugal compressor, an impeller adopts a binary closed impeller, blades of the impeller adopt a backward bending structure, the diameter of each blade is 800mm, the number of the impellers is 8, and the blades of the front impeller and the rear impeller deflect by 15 degrees; the diffuser adopts a vaned diffuser. Steam conditions are provided according to customer site conditions, so this embodiment employs turbine drive.
Example 7 Motor driven reforming recycle Hydrogen compressor
In this embodiment 7, a seven-stage centrifugal compressor is adopted, an impeller is a closed impeller, the impeller is binary, blades of the impeller are of a radial structure, the diameter of each blade is 600mm, the number of the blades is 8, and the blades of the front impeller and the rear impeller deflect by 30 degrees; vaneless diffusers are used. The steam condition is not available to the user on site, so the set of reforming device adopts a mode that a motor is connected with a gearbox and a compressor is connected.
Example 8 Motor driven reforming recycle Hydrogen compressor
The reforming circulating hydrogen compressor is driven by a motor, the compressor is arranged on one side of the motor and is in the form of the motor, a gear box and the compressor, the diameter of an impeller of the compressor is 600mm, the impeller adopts a binary closed impeller, blades of the binary closed impeller adopt a forward-bent structure, and the blades of the two impellers before and after the blades 7 deflect by 10 degrees; vaneless diffusers are used.
Example 9 Motor driven reforming recycle Hydrogen compressor
In this embodiment 9, a motor-driven reformed recycle hydrogen compressor is arranged on one side of a motor, and the compressor is in the form of a motor, a gear box and a compressor, the diameter of an impeller of the compressor is 700mm, the number of impellers of a binary closed impeller is 6, blades of the binary closed impeller are in a backward bending structure, and the blades of the front and rear impellers deflect by 5 degrees; vaneless diffusers are used.
Example 10 Motor driven reforming recycle Hydrogen compressor
In this embodiment 10, a reforming circulating hydrogen compressor driven by a motor is provided, and the compressor is arranged on one side of the motor, and takes the form of the motor + a gear box + the compressor, the diameter of an impeller of the compressor is 600mm, the impeller adopts a binary closed impeller, the number of the impellers is 8, blades of the impeller adopt a radial structure, and the blades of the front and rear impellers deflect by 20 degrees; vaneless diffusers are used.
After signing a technical confidentiality agreement with a user, the designer provides reforming recycle hydrogen compressors of different scales for catalytic reforming production lines of a plurality of large petrochemical enterprises, obtains quite ideal technical effect after stable operation for a period of time, creates better economic benefit and obtains the consistent and favorable comment of the users.
The above schemes are all embodiments of reforming recycle hydrogen compressors operated on different user sites, the driving forms used by the reforming recycle hydrogen compressors and the model selection structures of the compressors are all different according to different requirements of the whole reforming recycle hydrogen process, and the above embodiments are only partial reforming recycle hydrogen compressors operated on the user sites. The present invention is not limited to the above ten embodiments, and it will be apparent to those skilled in the art that various changes and modifications can be made in the form of the present invention, and all changes and modifications within the spirit and principle of the present invention should be construed as being included in the right of the present invention.

Claims (4)

1. A reforming circulating hydrogen compressor comprises four parts, namely a stator group, a rotor group, a bearing group, a sealing group and the like, wherein the stator group comprises a cylinder body, a left end cover, a right end cover, a partition plate, an air inlet cylinder and an air outlet cylinder; the rotor set comprises an impeller, a main shaft, a spacer bush, a balance disc, a thrust disc, a nut, an adjusting pad and a stop ring; the bearing group comprises two supporting bearings and a thrust bearing; the seal assembly comprises an interstage seal, a mouth ring seal, a balance disc seal, a shaft end seal and a dry gas seal, and is characterized in that:
(1) a plurality of sets of partition plates of the compressor are assembled together to form a partition plate bundle, and a main diffuser, a curve and a reflux device through which compressed gas of the compressor flows are naturally formed after the partition plate bundle is formed;
(2) the diameter of the impellers arranged on the rotor set is 600-900 mm, and the number of the impellers is 6-8. The impellers are arranged on the main shaft in a sequential manner, and the balance disc is arranged on one side.
(3) The diameters of the outlets of the front impeller and the rear impeller are the same, the diameters of the inlets are different, the front impeller and the rear impeller are different in the form of impeller blades, the impeller blades in front of the balance disc and the impeller blades behind the balance disc are different, and the blades of the rear impeller are arranged between the two adjacent impellers and deflect a certain angle relative to the blades of the front impeller;
(4) the supporting bearing adopts a tilting pad bearing, the thrust bearing adopts a Kimberley type, and in order to ensure the stress condition, the two sides of the thrust bearing adopt the same structure.
(5) The interstage seal and the port ring are hermetically arranged on the corresponding partition plates, and the shaft end seal and the dry gas seal are arranged on the left end cover and the right end cover of the unit.
2. A reforming cycle hydrogen compressor as defined in claim 1, wherein said diffuser is selected from the group consisting of a vaned diffuser and a vaneless diffuser.
3. A reformed recycle hydrogen compressor according to claim 1, wherein between two adjacent impellers, the vanes of the latter impeller are disposed at an angle offset with respect to the vanes of the former impeller; for the backward curved blade: 5-15 degrees; for forward curved blades: 5-15 degrees; the angle of the radial blade is 5-30 degrees.
4. A reforming cycle hydrogen compressor as defined in claim 1, wherein said impellers are arranged on the main shaft in a side-by-side arrangement with the balance disk on one side.
CN202011082657.9A 2020-10-12 2020-10-12 Reforming circulating hydrogen compressor Pending CN112228360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011082657.9A CN112228360A (en) 2020-10-12 2020-10-12 Reforming circulating hydrogen compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011082657.9A CN112228360A (en) 2020-10-12 2020-10-12 Reforming circulating hydrogen compressor

Publications (1)

Publication Number Publication Date
CN112228360A true CN112228360A (en) 2021-01-15

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106151063A (en) * 2016-08-29 2016-11-23 沈阳斯特机械制造有限公司 A kind of CO recycle gas compressor
CN107829957A (en) * 2017-10-26 2018-03-23 沈阳斯特机械制造有限公司 A kind of heavy oil hydrogenation equipment centrifugal compressor
CN207406500U (en) * 2017-09-12 2018-05-25 沈阳斯特机械制造有限公司 A kind of catalytic reforming unit centrifugal compressor
CN109519396A (en) * 2017-09-19 2019-03-26 沈阳斯特机械制造有限公司 A kind of gasoline and diesel hydrogenation modifying apparatus centrifugal compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106151063A (en) * 2016-08-29 2016-11-23 沈阳斯特机械制造有限公司 A kind of CO recycle gas compressor
CN207406500U (en) * 2017-09-12 2018-05-25 沈阳斯特机械制造有限公司 A kind of catalytic reforming unit centrifugal compressor
CN109519396A (en) * 2017-09-19 2019-03-26 沈阳斯特机械制造有限公司 A kind of gasoline and diesel hydrogenation modifying apparatus centrifugal compressor
CN107829957A (en) * 2017-10-26 2018-03-23 沈阳斯特机械制造有限公司 A kind of heavy oil hydrogenation equipment centrifugal compressor

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Application publication date: 20210115