CN103867446A - Method for anti-surge controlling of multi-stage compressing system - Google Patents
Method for anti-surge controlling of multi-stage compressing system Download PDFInfo
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- CN103867446A CN103867446A CN201310659897.4A CN201310659897A CN103867446A CN 103867446 A CN103867446 A CN 103867446A CN 201310659897 A CN201310659897 A CN 201310659897A CN 103867446 A CN103867446 A CN 103867446A
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
- F04D27/0215—Arrangements therefor, e.g. bleed or by-pass valves
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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
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage 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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0246—Surge control by varying geometry within the pumps, e.g. by adjusting vanes
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0284—Conjoint control of two or more different functions
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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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/12—Kind or type gaseous, i.e. compressible
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
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Abstract
Provided is a method for anti-surge controlling of a multi-stage compressing system. The multi-stage compressing system comprises a first-stage compressor to an N-stage compressor, a variable vane device installed on an inlet pipe connected with the first-stage compressor, a main pipe and a branch pipe installed on an outlet pipe connected with the N-stage compressor, and surge control valves installed on the branch pipe. The method comprises steps: through control of the variable vane device and at least one of the surge control valves, anti-surge controlling of the first-stage compressor is carried out; through control of the surge control valves, anti-surge controlling of the second-stage compressor to the N-stage compressor is carried out, wherein N is an integer which is equal to or more than 2.
Description
The application requires to be submitted on December 7th, 2012 rights and interests of the 10-2012-0142320 korean patent application of Department of Intellectual Property of Korea S, and the open of described application is all herein incorporated by reference.
Technical field
Exemplary embodiment relates to a kind of method of multi-stage compression system being carried out to Anti-surge Control.
Background technique
In the time that turbocompressor can not produce the pressure of the pressure resistance that is greater than system, in turbocompressor, periodically there is the backflow of fluid.This phenomenon is called as surging phenomenon.In the time there is surging phenomenon, regularly backflow of fluid causes the slight change of flow velocity and the pressure of fluid.The flow velocity of fluid and the variation of pressure cause mechanical vibration, thereby bearing, impeller etc. are caused to damage.Surging phenomenon may reduce the performance of turbocompressor and reduce the life-span of turbocompressor.Therefore, the key point of control turbocompressor may be to prevent surging phenomenon.
In order to prevent the generation of surging phenomenon, by being set in the performance map of Normal squeezing system, surge guide line also controls Normal squeezing system with described surge guide line.
2005-226561 Japan patent applicant announce discloses and a kind of by surge guide line is not only set, surge control zone has also been set, and controls drive point and do not appear at the technology that prevents the generation of surging phenomenon in surge control zone.
Summary of the invention
One or more exemplary embodiment provides a kind of method of multi-stage compression system being carried out to Anti-surge Control.
According to the one side of exemplary embodiment, a kind of method of multi-stage compression system being carried out to Anti-surge Control is provided, wherein, described multi-stage compression system comprises first order compressor to the N stage compressor, be arranged on the variable impeller assembly of the inlet pipe that is connected to first order compressor, be arranged on main pipeline and the branch pipeline of the outlet conduit that is connected to N stage compressor, and be arranged on the surge control valve of branch pipeline, described method comprises: by first order compressor being carried out to Anti-surge Control based at least one that process in relevant adiabatic head value controlled variable impeller assembly and surge control valve to the compression of first order compressor, by high stage compressor to the N stage compressor being carried out to Anti-surge Control based on processing the relevant temperature pressure head value control surge control valve that waits to the compression of high stage compressor to the N stage compressor, wherein, N represents to be equal to or greater than the integer of " 2 ".
Can pass through
determine adiabatic head value, wherein, H
adiabaticrepresent adiabatic head value, γ represents that R represents gas constant by the ratio of specific heat of compressed fluid, and T represents the temperature of the ingress of first order compressor, P
rexpression is passed through
and definite pressure ratio.
Can carry out Anti-surge Control to first order compressor by following steps: pre-determine at least one in the first surge guide line controlled variable impeller assembly and the surge control valve of first order compressor, make to process to the compression of the first order compressor value that relevant adiabatic head value does not exceed the first surge guide line in the time that first order compressor is driven.
Can pass through H
isothermal=RT1n (P
r) the temperature pressure head value such as determine, wherein, H
isothermalexpression waits temperature pressure head value, and R represents gas constant, and T represents the temperature of the ingress of high stage compressor, P
rexpression is passed through
and definite pressure ratio.
Can carry out Anti-surge Control to high stage compressor to the N stage compressor by following steps: pre-determine the second surge guide line of high stage compressor to the N stage compressor and control surge control valve, making to process the relevant temperature pressure head value that waits to the compression of high stage compressor to the N stage compressor and be no more than the value of the second surge guide line in the time that high stage compressor to the N stage compressor is driven.
Multi-stage compression system also can comprise: the first pressure transducer, for measuring the pressure of ingress of first order compressor; And first temperature transducer, for measuring the temperature of ingress of first order compressor.
Multi-stage compression system also can comprise: the second pressure transducer, for measuring the pressure of ingress of high stage compressor; And second temperature transducer, for measuring the temperature of ingress of high stage compressor.
Multi-stage compression system also can comprise: the 3rd pressure transducer, and for measuring the pressure in outlet port of N stage compressor.
At least one interstage cooler can be arranged between first order compressor to the N stage compressor.
Accompanying drawing explanation
From below in conjunction with accompanying drawing to embodiment's description, these and/or other aspect will become knows and be easier to understand, wherein:
Fig. 1 is according to the schematic concepts figure of the multi-stage compression system of exemplary embodiment;
Fig. 2 is the plotted curve for performance map, schematically show to carry out the first surge guide line that the first Anti-surge Control is relevant according to the multi-stage compression system of exemplary embodiment;
Fig. 3 is the plotted curve for performance map, schematically show to carry out the second surge guide line that the second Anti-surge Control is relevant according to the multi-stage compression system of exemplary embodiment.
Embodiment
Now will be in detail with reference to embodiment, its example is illustrated in the accompanying drawings, and wherein, identical reference number is indicated identical element all the time.In this, the present embodiment can have different forms, and should not be construed as limited to description set forth herein.Therefore,, by with reference to accompanying drawing, embodiment is only described to explain the many aspects of this description below.As used in this, when such as " ... at least one " be expressed in before a row element time, described statement is modified permutation element rather than is modified the discrete component in described row.
Fig. 1 is according to the schematic concepts figure of the multi-stage compression system 100 of exemplary embodiment.Fig. 2 is the plotted curve for performance map, schematically show to carry out the first surge guide line that the first Anti-surge Control is relevant according to the multi-stage compression system of exemplary embodiment.Fig. 3 is the plotted curve for performance map, schematically show to carry out the second surge guide line that the second Anti-surge Control is relevant according to the multi-stage compression system of exemplary embodiment.
With reference to Fig. 1, multi-stage compression system 100 comprises first order compressor 110, high stage compressor 120, third level compressor 130, fourth stage compressor 140, interstage cooler unit 150, variable impeller assembly (variable vane device) 160, surge control valve 170, the first pressure transducer 181, the second pressure transducer 182, the 3rd pressure transducer 183, the first temperature transducer 184, the second temperature transducer 185, inlet pipe 191, outlet conduit 192, main pipeline 193, branch pipeline 194 and control gear 195.
Although in the disclosure, for the ease of explaining, by the fluid being compressed according to current embodiment's multi-stage compression system 100, take air as example, the type of the fluid that multi-stage compression system 100 can compress is not limited to air.For example, can be inert gas, refrigerant gas, steam etc. by the fluid being compressed by multi-stage compression system 100.
Are the level Four compression systeies that comprise first order compressor 110, high stage compressor 120, third level compressor 130 and fourth stage compressor 140 according to current embodiment's multi-stage compression system 100, but the present embodiment is not limited to this.That is to say, not limited according to the quantity of the compressor of the multi-stage compression system of the present embodiment.For example, can be configured to comprise ten grades of compression systeies of ten compressors according to the multi-stage compression system of exemplary embodiment.
Although in current embodiment, the first interstage cooler 151 is between an adjacent compressor being arranged among compressor 110 to 140 in the 3rd interstage cooler 153, and the present embodiment is not limited to this.According to exemplary embodiment, multiple interstage coolers can be arranged between the adjacent compressor among compressor 110 to 140.
In variable impeller assembly 160, variable blade (not shown) and variable blade driving apparatus (not shown) are mounted to adjust the degree of opening of variable impeller assembly 160, to control the flow velocity of the fluid that flows into variable impeller assembly 160.Known inlet guide vance (IGV) can be used as variable impeller assembly 160.Therefore,, in current embodiment, suppose that variable impeller assembly 160 is known IGV that control electronically.
Under the control of control gear 195 or by user's manual control, surge control valve 170 is opened or closed to control surge.In other words, in the time that surge control valve 170 is opened, a part of fluid that flows through outlet conduit 192 via branch pipeline 194 by surge control valve 170.Then, the flow velocity Q of the fluid in pressure decreased and the multi-stage compression system 100 at outlet conduit 192 places increases, and reduces thus the generation of surge.
Gas by surge control valve 170 is discharged into atmosphere.According to current embodiment, are air and therefore can be discharged into atmosphere by the gas of surge control valve 170.But, if the gas of compression is the harmful gas that should not be discharged into atmosphere, the gas of compression can turn back to inlet pipe 191, or makes the gas of compression flow into recycling can (retrieval tank) (not shown) via independent bypass tube (not shown).
The first pressure transducer 181 is configured to measure the pressure that the inflow entrance (flow inlet) of first order compressor 110 locates and the result of measuring pressure is sent to control gear 195, and the first pressure transducer 181 is installed in inlet pipe 191 places.
Specifically, the first pressure transducer 181 is disposed in the pipeline between variable impeller assembly 160 and first order compressor 110.Known electronic pressure transmitter can be used as the first pressure transducer 181.
Be disposed in the pipeline place between variable impeller assembly 160 and first order compressor 110 according to the first pressure transducer 181 of current embodiment, but the present embodiment is not limited to this.That is to say, can be installed in the pipeline above of variable impeller assembly 160 according to the first pressure transducer 181 of exemplary embodiment.
The second pressure transducer 182 is measured the pressure (or the pressure in the outlet port of first order compressor 110) of the ingress of high stage compressor 120 and the result of measuring pressure is sent to control gear 195, the second pressure transducers 182 and is installed in the pipeline between the first interstage cooler 151 and high stage compressor 120.
Known electronic pressure transmitter can be used as the second pressure transducer 182.
Be disposed in the pipeline place between the first interstage cooler 151 and high stage compressor 120 according to the second pressure transducer 182 of current embodiment, but the present embodiment is not limited to this.For example, because the decline of the pressure of the first interstage cooler 151 during analyzing is conventionally very low to such an extent as to can be left in the basket, therefore can be installed in the pipeline place between fluid output and first interstage cooler 151 of first order compressor 110 according to the second pressure transducer 182 of exemplary embodiment.
The 3rd pressure transducer 183 measure fourth stage compressor 140 outlet port pressure and be installed in outlet conduit 192 places of the fluid output that is connected to fourth stage compressor 140.
Known electronic pressure transmitter can be used as the 3rd pressure transducer 183.
According to current embodiment, the first pressure transducer 181, the second pressure transducer 182 and the 3rd pressure transducer 183 are known electronic pressure transmitters that measurement result sent to automatically to control gear 195, but the present embodiment is not limited to this.That is to say, can be mechanical pressure sensor according to the first pressure transducer 181, the second pressure transducer 182 and the 3rd pressure transducer 183 of exemplary embodiment.In this case, user can obtain measurement result from these sensors, and oneself manually carries out Anti-surge Control based on described measurement result by him/her.
The first temperature transducer 184 is measured the temperature of the ingress of first order compressor 110, and the result of measuring temperature is sent to control gear 195, and the first temperature transducer 184 is installed in inlet pipe 191 places.
At length say, the first temperature transducer 184 is arranged in the pipeline place between variable impeller assembly 160 and first order compressor 110.Known electronic temperature transmitter can be used as the first temperature transducer 184.
Be disposed in the pipeline place between variable impeller assembly 160 and first order compressor 110 according to the first temperature transducer 184 of current embodiment, but the present embodiment is not limited to this.For example, can be installed in the pipeline above of variable impeller assembly 160 according to the first temperature transducer 184 of exemplary embodiment.
The second temperature transducer 185 measure high stage compressor 120 ingress temperature and send to control gear 195 by measuring the result of temperature, and the second temperature transducer 185 is installed in the pipeline place between the first interstage cooler 151 and high stage compressor 120.
Known electronic temperature transmitter can be used as the second temperature transducer 185.
According to current embodiment, the first temperature transducer 184 and the second temperature transducer 185 are electronic temperature transmitters of measuring temperature and the result of measuring temperature being sent to automatically to control gear 195, but the present embodiment is not limited to this.That is to say, can be mechanical temperature sensor according to the first temperature transducer 184 of exemplary embodiment and the second temperature transducer 185.In this case, user can obtain measurement result and oneself manually carry out Anti-surge Control based on measurement result by him/her from these sensors.
To describe the anti-surge control method of carrying out according to the multi-stage compression system 100 of exemplary embodiment now.
Comprise to the compression of first order compressor 110 and process the first relevant Anti-surge Control according to current embodiment's anti-surge control method, and process the second relevant Anti-surge Control to the compression of high stage compressor 120, third level compressor 130 and fourth stage compressor 140.
First the principle that, 110 execution are processed similar compression to adiabatic compression based on first order compressor is carried out the first Anti-surge Control.
Specifically, the adiabatic head value based on first order compressor 110 is carried out the first Anti-surge Control.Here, the adiabatic head value of first order compressor 110 can be calculated by equation 1:
[equation 1]
Wherein, " H
adiabatic" expression adiabatic head value; " γ " represents the ratio of specific heat of compressed gas (being air in current embodiment) (specific heat ratio); " R " represents gas constant; and the temperature of the ingress of " T " expression first order compressor 110, described temperature can be the value of being measured by the first temperature transducer 184.
In equation 1, " P
r" represent pressure ratio and can calculate by equation 2:
[equation 2]
In equation 2, can use the value measured by the first pressure transducer 181 as the pressure of the ingress of first order compressor 110 and use the value of being measured by the second pressure transducer 182 to calculate described pressure ratio P as the pressure in the outlet port of first order compressor 110
r.
Because interstage cooler unit 150 comprises that the first interstage cooler 151 is to the 3rd interstage cooler 153, therefore the compression processing of high stage compressor 120, third level compressor 130 and fourth stage compressor 140 is processed totally similar to isothermal compression.Therefore, based on isothermal compression, the second Anti-surge Control is carried out in processing.
That is to say, the compression processing based on high stage compressor 120, third level compressor 130 and fourth stage compressor 140 is regarded as one second compression and processes (SC) and process with isothermal compression the idea of carrying out similarly the second compression processing (SC) and carry out the second Anti-surge Control.That is to say, in the time that middle chiller unit 150 is used, the second compression is processed (SC) and is become similar to isothermal compression processing (such as the compression processing of Ericsson cycle), wherein, the second compression processing (SC) is made up of processing, the processing of third level compressor 130 and the processing of fourth stage compressor 140 of high stage compressor 120.That is, the second compression is processed (SC) and is regarded as single processing, and wherein, in described single processing procedure, high stage compressor 120 to fourth stage compressor 140 operates.
Therefore, the temperature pressure head value that waits based on using in the second compression processing (SC) is carried out the second Anti-surge Control.Here, can be by temperature pressure head values such as equation 3 calculate:
[equation 3]
H
isothermal=RT1n(P
r)
Wherein, " H
isothermal" value such as temperature pressure head such as expression grade, " R " represents that gas constant and " T " represent the temperature of the ingress of high stage compressor 120, wherein, described temperature can be the value of being measured by the second temperature transducer 185.
In equation 3, " P
r" represent pressure ratio and can calculate by equation 4:
[equation 4]
In equation 4, can use the value measured by the second pressure transducer 182 as the pressure of the ingress of high stage compressor 120 and use the value of being measured by the 3rd pressure transducer 183 to carry out calculating pressure as the pressure in the outlet port of fourth stage compressor 140 and compare P
r.Here using the reason of the pressure in the outlet port of fourth stage compressor 140, is because are fourth stages according to the afterbody of current embodiment's multi-stage compression system 100.If afterbody is N level, calculate with the pressure in the outlet port of N stage compressor the pressure ratio P expressing in above-mentioned equation 3
r.Here, N represents to be equal to or greater than the integer of " 2 ".
To processing that carry out the first Anti-surge Control and the second Anti-surge Control be described in more detail below.
The MANUFACTURER of multi-stage compression system 100 or artificer arrange by carry out theory analysis and many experiments for described multi-stage compression system 100 surge line that surge occurs, and by approximately 10% safe clearance is set in advance in described surge line, surge guide line are set.Here, by approximately 10% safe clearance is set in surge line, surge guide line is set, but the safe clearance allowing can be according to changing from artificer or user's demand.
Specifically, in the compression of first order compressor 110 is processed, as shown in Figure 2, determine the first surge line and the first surge guide line based on adiabatic head value, and the value of these lines is stored in the data space (storage) of control gear 195.
Similarly, in the second compression processing (SC), as shown in Figure 3, based on waiting temperature pressure head value to determine the second surge line and the second surge guide line, and the value of these lines is stored in the data space (storage) of control gear 195.
Now description multi-stage compression system 100 is consigned to user from MANUFACTURER, the situation that is mounted and is switched on to operate by user.
In the time that multi-stage compression system 100 is operated, first order compressor 110, high stage compressor 120, third level compressor 130 and fourth stage compressor 140 are powered, and these compressors are actuated to start compression subsequently.
That is to say, in order to carry out the first Anti-surge Control, control gear 195 use equatioies 1 and equation 2 calculate adiabatic head value H
adiabatic, and monitor adiabatic head value H
adiabaticwhether identical with the value of the first surge guide line of Fig. 2.As the example of monitoring method, deduct the adiabatic head value H of real-time calculating from the value of the first surge guide line of pre-entering and storing
adiabatic, and the result of subtraction becomes the time point that equals " 0 " and is set to the first Anti-surge Control by the time point being activated.
Specifically, for example, as the adiabatic head value H calculating in real time as shown in Figure 2
adiabaticwhile reaching a some B from an A, control gear 195 can determine that current point in time is that the first Anti-surge Control is by the time point being activated, and by carrying out the first Anti-surge Control by least one in following method: increase variable impeller assembly 160 degree of opening method and open the method for surge control valve 170, thereby prevent from, in first order compressor 110, surge occurs.
Here, in the time that variable impeller assembly 160 operates to increase its degree of opening, the flow velocity of fluid increases, and performance curve shifts to the right of the performance map of Fig. 2, thereby prevents from, in first order compressor 110, surge occurs.In the time that surge control valve 170 is opened, the flow velocity of fluid also increases, and pressure decreased, thereby prevents from, in first order compressor 110, surge occurs.
In addition,, in order to carry out the second Anti-surge Control, control gear 195 is by the temperature pressure head value H such as calculating with equation 3 and 4
isothermal, and the temperature pressure head value H such as monitoring
isothermalwhether equal the value of the second surge guide line of Fig. 3.As the example of monitoring method, what deduct real-time calculating from the value of the second surge guide line of pre-entering waits temperature pressure head value H
isothermal, and the result of subtraction becomes the time point that equals " 0 " and is set to the second Anti-surge Control by the time point being activated.
Specifically, for example, when waiting as shown in Figure 3 temperature pressure head value H
isothermalwhile reaching a some D from a C, control gear 195 can determine that current point in time is that the second Anti-surge Control is by the time point being activated, and carry out the second Anti-surge Control by the method that use is opened surge control valve 170, thereby prevent from, in high stage compressor 120, third level compressor 130 and fourth stage compressor 140, surge occurs.Here,, in the time that surge control valve 170 is opened, in these compressors, the increase of the flow velocity of fluid and pressure reduce, thereby prevent from, in high stage compressor 120, third level compressor 130 and fourth stage compressor 140, surge occurs.
Above-mentioned the first Anti-surge Control and the second Anti-surge Control by together with carry out.That is to say, even only there is surge in a compressor in the compressor 110 to 140 of multi-stage compression system 100, the performance of multi-stage compression system 100 is also lowered.Therefore, Anti-surge Control should be performed surging phenomenon not occur in any one making in compressor 110 to 140.
According to current embodiment, control gear 195 automatically detects the generation of surging phenomenon and carries out Anti-surge Control according to the program pre-entering, but the present embodiment is not limited to this.That is to say, according to exemplary embodiment, he/her can the measurement result based on receiving from the first pressure transducer 181, the second pressure transducer 182, the 3rd pressure transducer 183, the first temperature transducer 184 and the second temperature transducer 185 calculate pressure head value user by oneself, the value of result of calculation and predetermined surge guide line is compared, and carry out Anti-surge Control by the manual controlled variable impeller assembly 160 of result and surge control valve 170 based on the comparison.
Described above comprise the multi-stage compression system 100 of first order compressor 110 to the level Four compression system of fourth stage compressor 140 according to current embodiment's conduct.But the progression of multi-stage compression system 100 is to be described to four and thereby be not limited to four for the ease of explanation.That is to say, the progression of multi-stage compression system 100 can be set to N(here, N >=2) and multi-stage compression system 100 can therefore comprise N compressor.In this case, the above description of fourth stage compressor 140 can be applied directly to N stage compressor.
As mentioned above, according to current embodiment, the Anti-surge Control of multi-stage compression system 100 is divided into the first Anti-surge Control and the second Anti-surge Control.Carry out the first Anti-surge Control by least one in adiabatic head value controlled variable impeller assembly 160 and surge control valve 170 based on first order compressor 110.Carry out the second Anti-surge Control by the temperature pressure head value control surge control valve 170 that waits based on the second compression processing (SC).Therefore, can carry out Anti-surge Control according to the characteristic that comprises the multi-stage compression system 100 for carrying out intercooled interstage cooler unit 150.Therefore, Anti-surge Control can be stablized and be carried out con vigore, thereby improves the performance of multi-stage compression system 100.
In addition, according to current embodiment, even if the progression of multi-stage compression system 100 is larger, also can be by being divided into two groups and carrying out Anti-surge Control being included in compressor in multi-stage compression system 100.Specifically, the in the situation that of N level multi-stage compression system, first order compressor can be classified as first group, and high stage compressor to the N stage compressor can be classified as second group, can carry out the first Anti-surge Control and can carry out the second Anti-surge Control to second group first group.Here N >=2.In this case, even if the progression of multi-stage compression system is larger, also can use the sensor of minimum number to carry out simply Anti-surge Control, thereby save setup and manage cost.
As mentioned above, according to exemplary embodiment, multi-stage compression system is carried out to the method for Anti-surge Control and can carry out stable Anti-surge Control to multi-stage compression system.
Should be appreciated that, exemplary embodiment described here should be only considered with descriptive meaning, rather than object in order to limit.Feature in each embodiment or aspect description conventionally should be regarded as can be used for other similar characteristics or the aspect in other embodiments.
Although described one or more embodiment of the present invention with reference to the accompanying drawings, it will be appreciated by the skilled addressee that in the case of not departing from the spirit and scope of the present invention that are defined by the claims, can make the various changes in form and details at this.
Claims (9)
1. one kind is carried out the method for Anti-surge Control to multi-stage compression system, wherein, described multi-stage compression system comprises first order compressor to the N stage compressor, is arranged on the variable impeller assembly of the inlet pipe that is connected to first order compressor, the main pipeline that is arranged on the outlet conduit that is connected to N stage compressor and branch pipeline and is arranged on the surge control valve of branch pipeline, and described method comprises:
By based at least one that process in relevant adiabatic head value controlled variable impeller assembly and surge control valve to the compression of first order compressor, first order compressor being carried out to Anti-surge Control,
By based on processing the relevant temperature pressure head value control surge control valve that waits to the compression of high stage compressor to the N stage compressor, high stage compressor to the N stage compressor being carried out to Anti-surge Control, and
Wherein, N represents to be equal to or greater than the integer of " 2 ".
2. the method for claim 1, wherein pass through
determine adiabatic head value,
Wherein, H
adiabaticrepresent adiabatic head value, γ represents that R represents gas constant by the ratio of specific heat of compressed fluid, and T represents the temperature of the ingress of first order compressor, P
rexpression is passed through
and definite pressure ratio.
3. the method for claim 1, wherein, by following steps, first order compressor is carried out to Anti-surge Control: pre-determine at least one in the first surge guide line controlled variable impeller assembly and the surge control valve of first order compressor, make to process to the compression of the first order compressor value that relevant adiabatic head value does not exceed the first surge guide line in the time that first order compressor is driven.
4. the method for claim 1, wherein pass through H
isothermal=RT1n (P
r) the temperature pressure head value such as determine,
Wherein, H
isothermalexpression waits temperature pressure head value, and R represents gas constant, and T represents that the temperature of the ingress of high stage compressor, Pr represent to pass through
and definite pressure ratio.
5. the method for claim 1, wherein, by following steps, high stage compressor to the N stage compressor is carried out to Anti-surge Control: pre-determine the second surge guide line of high stage compressor to the N stage compressor and control surge control valve, making to process the relevant temperature pressure head value that waits to the compression of high stage compressor to the N stage compressor and be no more than the value of the second surge guide line in the time that high stage compressor to the N stage compressor is driven.
6. the method for claim 1, wherein multi-stage compression system also comprises:
The first pressure transducer, for measuring the pressure of ingress of first order compressor; And
The first temperature transducer, for measuring the temperature of ingress of first order compressor.
7. the method for claim 1, wherein multi-stage compression system also comprises:
The second pressure transducer, for measuring the pressure of ingress of high stage compressor; And
The second temperature transducer, for measuring the temperature of ingress of high stage compressor.
8. the method for claim 1, wherein multi-stage compression system also comprises:
The 3rd pressure transducer, for measuring the pressure in outlet port of N stage compressor.
9. the method for claim 1, wherein at least one interstage cooler is arranged between first order compressor to the N stage compressor.
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| CN105257540A (en) * | 2015-11-05 | 2016-01-20 | 山东三牛机械有限公司 | Double-pole high-pressure dry type roots vacuum pump unit |
| CN105443348A (en) * | 2015-12-23 | 2016-03-30 | 上海金自天正信息技术有限公司 | Gas compressor system |
| CN107202028A (en) * | 2017-05-31 | 2017-09-26 | 北京理工大学 | A kind of turbocharger centrifugal compressor surge recognition methods |
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| CN110529422A (en) * | 2018-05-25 | 2019-12-03 | 势加透博（北京）科技有限公司 | A kind of antisurge control system of compressor |
| CN111164312A (en) * | 2017-10-31 | 2020-05-15 | 克里奥斯塔股份有限公司 | Method for controlling outlet pressure of compressor |
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| CN115704644A (en) * | 2021-08-10 | 2023-02-17 | 中国石油天然气股份有限公司 | LNG liquefaction device and control method thereof |
| CN114837967A (en) * | 2022-05-06 | 2022-08-02 | 重庆江增船舶重工有限公司 | Automatic anti-surge method of multistage compressor |
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Also Published As
| Publication number | Publication date |
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| CN103867446B (en) | 2017-05-03 |
| KR20140074101A (en) | 2014-06-17 |
| KR101858648B1 (en) | 2018-05-16 |
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