CN106402033A - Centrifugal compressor for olefin DCC technology - Google Patents
Centrifugal compressor for olefin DCC technology Download PDFInfo
- Publication number
- CN106402033A CN106402033A CN201611067743.6A CN201611067743A CN106402033A CN 106402033 A CN106402033 A CN 106402033A CN 201611067743 A CN201611067743 A CN 201611067743A CN 106402033 A CN106402033 A CN 106402033A
- Authority
- CN
- China
- Prior art keywords
- impeller
- compressor
- diameter
- leading portion
- back segment
- Prior art date
- 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.)
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Classifications
-
- 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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- 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
-
- 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
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
Abstract
A centrifugal compressor for an olefin DCC technology mainly comprises a main shaft, an impeller, a partition board, a coupler, a diffuser, an upper shell, a lower shell, a sealing assembly and a bearing and is characterized in that 1, a vaneless diffuser with an equal-width annular runner which is formed by two parallel wall surfaces is adopted; 2, the inner diameter D3 of the vaneless diffuser is 1.03-1.12 times of the diameter D2 of the impeller; 3, the diameter D2 of the impeller at the rear section of the compressor is smaller than the diameter of the impeller at the front section, and an outlet forming angle beta k2 of the impeller at the rear section is larger than the outlet forming angle of the impeller at the front section; and 4, a cooler, two air inlet cylinders and two air outlet cylinders are additionally arranged below the compressor. The centrifugal compressor for the olefin DCC technology provides circulating power for stabilizing pressure and temperature in the olefin production process, enabling the pressure ratio at each section of the technology to reach optimum matching and accordingly enabling the sum of power consumption at each section of the production technology to reach a minimum value. The purposes of energy saving and efficiency increasing are achieved.
Description
Technical field
The invention belongs to the technical field of centrifugal compressor, it is related specifically to be applied to and produces the DCC of alkene (catalysis is split
Solution) technique centrifugal compressor.
Background technology
Catalytic pyrolysiss (Deep Catalytic Cracking DCC) new technology is that China's national oil chemical engineering science is ground
Study carefully the original invention of institute, it includes：Reaction-regeneration, fractional distillation and three systems of Vapor recovery unit, raw oil is through steam atomization
Afterwards enter riser add contact with hot regenerated catalyst in fluid bed (DCC- I type) or riser (DCC- II type) reactor into
Row catalytic cracking reaction, product further separates after being fractionated into.This technique is suitable for processing heavy raw oil, due to urging
The use of agent, its reaction temperature is lower 200～250 DEG C than conventional vapor cracking, and it can also be adjusted flexibly operation simultaneously, real
Existing maximum propylene or a large amount of productions of propylene and isomery alkene.
Producing in DCC new technology has the saying of three machine systems in olefin equipment, so-called three machine systems include main air blower, aerostatic press
And supercharger, what they adopted in principle is all centrifugal compressor.Due to the difference of function, the performance for centrifugal compressor will
Ask different, correspondingly their structure also should have been improved, but also can't see everybody on current market to this
The attention of problem.
In website (www.sipo.gov.cn) retrieving to State Intellectual Property Office, we simultaneously find no specially
Door is directed to the centrifugal compressor of DCC technique, in order to improve the production efficiency of DCC technique and the quality of alkene further, we
It is attached to DCC technique and be specifically designed alkene DCC technique centrifugal compressor.
Content of the invention
It is an object of the invention to provide a kind of centrifugal compressor being suitable for the use of DCC technique, it can be according to DCC technique
Parameter provides the circulation power of steady pressure and temperature for production process, and the summation trying to achieve each section of power consumption reaches minimum, and accordingly
Determine the optimal allocation value of each section of pressure ratio.
The invention provides a kind of alkene DCC technique centrifugal compressor, it mainly includes：Main shaft, impeller, dividing plate,
Shaft coupling, diffuser, upper casing, lower casing, black box and bearing it is characterised in that：
(1) using the vaneless diffuser of the equal in width annular channel being made up of two parallel wall surfaces；
(2) the internal diameter D of vaneless diffuser3For impeller diameter D21.03～1.12 times；
(3) the impeller diameter D of compressor back segment2It is less than the impeller diameter of leading portion；And back segment impeller go out outlet structure angle
βk2Then be greater than leading portion impeller goes out outlet structure angle；
(4) lower section of compressor is separately provided with cooler and two air induction masts, two gas outlets.
Described alkene DCC technique centrifugal compressor, its vaneless diffuser internal diameter D3With impeller diameter D2Preferred ratio
For main air blower it is：1.03
Described alkene DCC technique centrifugal compressor, its vaneless diffuser internal diameter D3With impeller diameter D2Preferred ratio
For compressor it is：1.12
Described alkene DCC technique centrifugal compressor, its vaneless diffuser internal diameter D3With impeller diameter D2Preferred ratio
For supercharger it is：1.08
The diameter D of described alkene DCC technique centrifugal compressor, its compressor back segment impeller and leading portion impeller2Ratio
It is worth and be：0.98～0.90；；And back segment impeller and leading portion impeller go out outlet structure angle betak2. ratio be：1.03～1.08；
The diameter D of described alkene DCC technique centrifugal compressor, its compressor back segment impeller and leading portion impeller2Excellent
Select ratio, for main air blower be：0.98；；And back segment impeller and leading portion impeller go out outlet structure angle betak2. preferred ratio, for
Main air blower is：1.08；
The diameter D of described alkene DCC technique centrifugal compressor, its compressor back segment impeller and leading portion impeller2Excellent
Select ratio, for compressor be：0.95；And back segment impeller and leading portion impeller go out outlet structure angle betak2. preferred ratio, for pressure
Contracting machine is 1.06：
The diameter D of described alkene DCC technique centrifugal compressor, its compressor back segment impeller and leading portion impeller2Excellent
Select ratio, for supercharger be：0.90；And back segment impeller and leading portion impeller go out outlet structure angle betak2. preferred ratio, for increasing
Press is：1.03.
Described alkene DCC technique centrifugal compressor, its cooler is placed in one section of chimney fan and two-stage nitration enter air duct it
Between, cooling water flows into from the lower water inlet of cooler, flows out from upper water-out mouth, and compressed gas flow into from enterprising QI KOU, go out from down
QI KOU flows out.
The present invention focus on research with each section of power consumption of compressor minimum principle design, to the structure of diffuser, diffuser with
The parameters such as the cooperation of impeller, impeller outlet angle are improved, and arrange two air induction masts and two below compressor and give vent to anger
Cylinder and cooler cooperation, ultimately form the innovation structure of the present invention.
Alkene DCC technique centrifugal compressor provided by the present invention, during the use of petrochemical enterprise, obtains
Good economic benefit, it is not only that the production process of alkene provides the circulation power of steady pressure and temperature so that should
Each section of pressure ratio of technique reaches best match, so make the summation of each section of power consumption of its production technology reach minima it is achieved that
The purpose of energy efficiency.
Brief description
Fig. 1 is the front view of the centrifugal compressor of the present invention；Fig. 2 is the front view of intercooler；Fig. 3 is the office of impeller
Portion's view.
In above-mentioned each in figure, 1,3 enter air duct；2nd, 4 chimney fan；5 upper casings；6 lower casings；7 main shafts；8 impellers；9 sealing groups
Part；10 dividing plates；11 bearings；12 shaft couplings；13 diffusers.
Specific embodiment
Below in conjunction with the accompanying drawings the alkene DCC technique of the present invention is made further to supplement and explanation with centrifugal compressor.
As shown in figure 1, first 1,3 are entered air duct；2nd, 4 chimney fan；5 upper casings；6 lower casings；7 main shafts；8 impellers；9 sealings
Assembly；10 dividing plates；11 bearings；12 shaft couplings；13 diffusers, above-mentioned each part machine-shaping respectively, but in process should
Note diffuser internal diameter D3With impeller diameter D3Inatheadearomatizationazone control between 1.03～1.12 times；Compressor back segment impeller
Diameter D with leading portion impeller2Ratio control be 0.98～0.90；；And back segment impeller and leading portion impeller go out outlet structure angle betak2.
Ratio be then controlled to 1.03～1.08.Assembled again after above-mentioned each component processing, detection finish, paid after last test run
User.
The different requirements that according to olefin equipment three are, its specific embodiment is as follows：
1 22 ten thousand tons/year of alkene DCC technique main air blowers of embodiment
220000 tons/year of DCC technique main air blowers, its diffuser is using the equal in width annular flow being made up of two parallel wall surfaces
The vaneless diffuser in road, the diameter D of impeller2For 1000 millimeters；The internal diameter D of vaneless diffuser3With impeller diameter D3Ratio be
1.03, its back segment impeller is 0.98 with the preferred ratio of the diameter of leading portion impeller；And the outlet structure of back segment impeller and leading portion impeller
Make angle betak2. preferred ratio be 1.08, be provided with cooler and two air induction masts, two gas outlets below main air blower.
2 200 ten thousand tons/year of alkene DCC technique main air blowers of embodiment
2000000 tons/year of DCC technique main air blowers, its diffuser is using the equal in width annular being made up of two parallel wall surfaces
The vaneless diffuser of runner, the diameter D of impeller2For 900 millimeters；Vaneless diffuser internal diameter D3With impeller diameter D3Ratio be
1.03, the impeller diameter of compressor back segment is 0.98 with the ratio of leading portion impeller diameter, and the outlet of back segment impeller and leading portion impeller
Construction angle betak2Ratio be 1.08, be provided with cooler and two air induction masts, two gas outlets below main air blower.
3 220 ten thousand tons/year of alkene DCC technique compressors of embodiment
2200000 tons/year of DCC technique compressors, its diffuser is using the equal in width annular being made up of two parallel wall surfaces
The vaneless diffuser of runner, the diameter D of impeller2For 450 millimeters；Vaneless diffuser internal diameter is 1.12 with the ratio of impeller diameter,
The ratio of the impeller diameter of compressor back segment and leading portion impeller diameter is 0.95, and back segment impeller and leading portion impeller go out outlet structure angle
βk2Ratio be 1.13, be provided with cooler and two air induction masts, two gas outlets below compressor.
4 220 ten thousand tons/year of alkene DCC technique superchargers of embodiment
2200000 tons/year of alkene DCC technique superchargers, its diffuser is using the equal in width being made up of two parallel wall surfaces
The vaneless diffuser of annular channel, the diameter D of impeller2For 600 millimeters；Vaneless diffuser internal diameter with the ratio of impeller diameter is
1.08, the impeller diameter of compressor back segment is 0.90 with the ratio of leading portion impeller diameter, and the outlet of back segment impeller and leading portion impeller
Construction angle betak2Ratio be 1.03, be provided with cooler and two air induction masts, two gas outlets below supercharger.
The various embodiments described above are only the design requiring and proposing according to the different process pipelines of user, these sides
Case, after same client signs corresponding confidentiality agreement, model machine is supplied to user and tries out the special case obtaining more satisfied effect,
More embodiments therefore can also be included.For a person skilled in the art, the present invention can have multiple change and
Change.All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, done etc., should be included in this
Within bright protection domain.
Claims (9)
1. a kind of alkene DCC technique centrifugal compressor, it mainly includes：Main shaft, impeller, dividing plate, shaft coupling, diffuser,
Upper casing, lower casing, black box and bearing it is characterised in that：
(1) using the vaneless diffuser of the equal in width annular channel being made up of two parallel wall surfaces；
(2) the internal diameter D of vaneless diffuser3For impeller outer diameter D21.03～1.12 times；
(3) the impeller diameter D of compressor back segment2It is less than the impeller diameter of leading portion；And back segment impeller go out outlet structure angle betak2Then
Be greater than leading portion impeller goes out outlet structure angle；
(4) lower section of compressor is separately provided with cooler and two air induction masts, two gas outlets.
2. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described vaneless diffuser internal diameter
D3With impeller diameter D2Preferred ratio for main air blower be：1.03.
3. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described vaneless diffuser internal diameter
D3With impeller diameter D2Preferred ratio for compressor be：1.12.
4. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described vaneless diffuser internal diameter
D3With impeller diameter D2Preferred ratio for supercharger be：1.08.
5. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described compressor back segment impeller
Diameter D with leading portion impeller2Ratio be：0.98～0.90；And back segment impeller and leading portion impeller go out outlet structure angle betak2. ratio
It is worth and be：1.03～1.08.
6. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described compressor back segment impeller
Diameter D with leading portion impeller2Preferred ratio, for main air blower be：0.98；And back segment impeller and leading portion impeller go out outlet structure
Angle betak2. preferred ratio, for main air blower be：1.08.
7. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described compressor back segment impeller
Diameter D with leading portion impeller2Preferred ratio, for compressor be：0.95；And back segment impeller and leading portion impeller go out outlet structure
Angle betak2. preferred ratio, for compressor be：1.06.
8. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described compressor back segment impeller
Diameter D with leading portion impeller2Preferred ratio, for supercharger be：0.90；And back segment impeller and leading portion impeller go out outlet structure
Angle betak2. preferred ratio, for supercharger be：1.03.
9. the alkene DCC technique centrifugal compressor as described in claim 1 is it is characterised in that described cooler is placed in one
Section chimney fan and two-stage nitration enter between air duct, and cooling water flows into from the lower water inlet of cooler, flows out from upper water-out mouth, compressed gas
Flow into from enterprising QI KOU, flow out from lower gas outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611067743.6A CN106402033A (en) | 2016-11-29 | 2016-11-29 | Centrifugal compressor for olefin DCC technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611067743.6A CN106402033A (en) | 2016-11-29 | 2016-11-29 | Centrifugal compressor for olefin DCC technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106402033A true CN106402033A (en) | 2017-02-15 |
Family
ID=58082158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611067743.6A Pending CN106402033A (en) | 2016-11-29 | 2016-11-29 | Centrifugal compressor for olefin DCC technology |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2759662A (en) * | 1950-04-26 | 1956-08-21 | Carrier Corp | Centrifugal compressors |
| CN103047176A (en) * | 2011-10-17 | 2013-04-17 | 沈阳透平机械股份有限公司 | PCL compressor model stage and design method thereof |
| US20140227079A1 (en) * | 2013-02-13 | 2014-08-14 | Dresser-Rand Company | Midspan active magnetic bearing |
| CN205578296U (en) * | 2016-03-17 | 2016-09-14 | 北京斯特透平机械有限公司 | Take intercooler's centrifugal compressor |
| CN205669505U (en) * | 2016-03-17 | 2016-11-02 | 北京斯特透平机械有限公司 | A kind of centrifugal compressor of band Series Connection Type Dry Gas |
| CN206246421U (en) * | 2016-11-29 | 2017-06-13 | 沈阳斯特机械制造有限公司 | A kind of alkene DCC technique centrifugal compressors |
-
2016
- 2016-11-29 CN CN201611067743.6A patent/CN106402033A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2759662A (en) * | 1950-04-26 | 1956-08-21 | Carrier Corp | Centrifugal compressors |
| CN103047176A (en) * | 2011-10-17 | 2013-04-17 | 沈阳透平机械股份有限公司 | PCL compressor model stage and design method thereof |
| US20140227079A1 (en) * | 2013-02-13 | 2014-08-14 | Dresser-Rand Company | Midspan active magnetic bearing |
| CN205578296U (en) * | 2016-03-17 | 2016-09-14 | 北京斯特透平机械有限公司 | Take intercooler's centrifugal compressor |
| CN205669505U (en) * | 2016-03-17 | 2016-11-02 | 北京斯特透平机械有限公司 | A kind of centrifugal compressor of band Series Connection Type Dry Gas |
| CN206246421U (en) * | 2016-11-29 | 2017-06-13 | 沈阳斯特机械制造有限公司 | A kind of alkene DCC technique centrifugal compressors |
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Application publication date: 20170215 |