CN109026801A - A kind of single shaft Systems of Centrifugal Compressor Unit and low energy consumption operating method - Google Patents
A kind of single shaft Systems of Centrifugal Compressor Unit and low energy consumption operating method Download PDFInfo
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- CN109026801A CN109026801A CN201810802356.5A CN201810802356A CN109026801A CN 109026801 A CN109026801 A CN 109026801A CN 201810802356 A CN201810802356 A CN 201810802356A CN 109026801 A CN109026801 A CN 109026801A
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 15
- 238000011017 operating method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 13
- 238000005119 centrifugation Methods 0.000 claims description 12
- 238000010992 reflux Methods 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 241001400675 Sympodium Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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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
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/163—Combinations of two or more pumps ; Producing two or more separate gas flows driven by a common gearing arrangement
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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
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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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
- F04D27/003—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by throttling
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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
- F04D27/005—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by changing flow path between different stages or between a plurality of compressors; Load distribution between compressors
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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
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
-
- 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
Abstract
The present invention provides a kind of uniaxial Systems of Centrifugal Compressor Unit and low energy consumption operating methods, wherein the first anti-surge return valve is connected between the four-way forking node and one section of centrifugal compressor；The second anti-surge return valve is connected between the four-way interflow node and the outlet of the second cooler；One section outlet stop valve and one section outlet check valve have been sequentially connected in series between the four-way forking node and four-way interflow node.When inlet end is when carrying out atmospheric pressure more than or equal to threshold value, two sections of high load capacity work simultaneously, when inlet end is when carrying out atmospheric pressure less than threshold value, only two sections of high load capacities work.Compressor set of the invention has widened the inlet pressure fluctuation condition range that uniaxial centrifugal compressor adapts to, and it is horizontal to improve overall operation efficiency in the section situation of 2 times or more for total demand pressure ratio variation caused by being particularly suitable for the variation because of inlet pressure.
Description
Technical field
The invention belongs to turbocompressor fields, are related to uniaxial Systems of Centrifugal Compressor Unit, and in particular to a kind of uniaxial centrifugation pressure
Contracting unit and low energy consumption operating method.
Background technique
Process industry is widely applied in uniaxial centrifugal compressor, has the characteristics of stable, high reliablity.General centrifugation
When compressor design, the most harsh operating condition provided according to user is designed, guarantees that compressor is capable of providing and meets technique need
The maximum stream flow and maximum pressure ratio asked.And when technical load changes, for example the flow of demand becomes smaller, outlet pressure reduces
When etc. changing, compressor then needs to be adjusted to adapt to the demand of technique change.
Centrifugal compressor carry out Load Regulation mode generally have flow restriction control, entry guide vane adjust, variable speed adjust and
And reflux is adjusted.Wherein entry guide vane is adjusted similar with valve regulated, only joined the ability that part changes impeller workmanship, compared with
Simple valve regulated is compared, and efficiency is higher.But because structure is complicated, on uniaxial centrifugal compressor not frequently with.
If process unit demand is pressure and the certain process gas of flow, and enters the entrance of compressor set at this time
There are when wide fluctuations, compressor is designed pressure by minimum inlet pressure.When compressor inlet pressure increases and changes
When amplitude is very big, then adjusting can only be adjusted or flowed back using inlet restriction to realize.Entry guide vane and adjustable vane form
Structure is complicated and adjustable range is limited for regulation scheme, and variable speed adjusting is limited to rotor dynamics factor, to guarantee simultaneously
Mouth pressure and flow are constant very difficult, can only realize within the scope of small change.But directly adopt inlet restriction adjust and
Flow back the scheme adjusted, and unit comprehensive operation efficiency is low, less economical.
Currently there is this inlet pressure operating condition and change the regulation scheme that decompression throttling is usually used in king-sized way,
Or simply it is designed to that two adapt to the compressor of different operating conditions to meet the power conservation requirement of operation.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of uniaxial Systems of Centrifugal Compressor Unit and low
Energy consumption operating method solves compressor in the prior art, when technique require outlet pressure and flow is constant and inlet pressure becomes
When change range is wide, the low technical problem of the comprehensive operation efficiency of compressor.
In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme:
A kind of single shaft Systems of Centrifugal Compressor Unit, including uniaxial two-part centrifugal compressor, the uniaxial two-part are centrifuged pressure
Contracting machine is divided into one section of centrifugal compressor and two sections of centrifugal compressors, which is characterized in that is arranged on one section of centrifugal compressor
There are the first air inlet pipe and the first escape pipe, is connected with the second air inlet pipe and the second escape pipe on two sections of centrifugal compressors；
First air inlet pipe has been sequentially connected in series the first air inlet adjustment valve from inlet end between one section of centrifugal compressor；
First escape pipe is from one section of centrifugal compressor to being sequentially connected in series the first cooler, four-way forking node between torch end
With torch regulating valve；
Second air inlet pipe from inlet end to be sequentially connected in series between two sections of centrifugal compressors the second air inlet adjustment valve,
Two sections of breather check valves and four-way collaborate node；Second escape pipe is connected from two sections of centrifugal compressors between outlet side
There is the second cooler；
The reflux of the first anti-surge is connected between the four-way forking node and the entrance of one section of centrifugal compressor to adjust
Valve；The second anti-surge return valve is connected between the four-way interflow node and the outlet of the second cooler；Described
One section outlet stop valve and one section outlet check valve have been sequentially connected in series between four-way forking node and four-way interflow node.
The present invention also has following technical characteristic:
The uniaxial two-part centrifugal compressor is driven by booster engine and frequency control motor.
The present invention also protects a kind of low energy consumption operating method of uniaxial Systems of Centrifugal Compressor Unit, and this method is using as described above
Uniaxial Systems of Centrifugal Compressor Unit, real-time monitoring inlet end carry out atmospheric pressure, this method specifically includes the following steps:
Step 1, when inlet end is when carrying out atmospheric pressure more than or equal to threshold value so that uniaxial Systems of Centrifugal Compressor Unit from one section from
High load capacity works to cutting between the independent high load capacity work of two sections of centrifugal compressors simultaneously for heart compressor and two sections of centrifugal compressors
It changes realization and does not shut down switching online,
Step 2, when inlet end is when carrying out atmospheric pressure less than threshold value, uniaxial Systems of Centrifugal Compressor Unit is from two sections of centrifugal compressors
Independent high load capacity works to one section of centrifugal compressor and the switching of high load capacity work simultaneously of two sections of centrifugal compressors, which is
Switching is not shut down online.
The detailed process of step 1 are as follows:
Original state, one section of centrifugal compressor and the high load capacity work simultaneously of two sections of centrifugal compressors, the first air inlet adjustment valve
It opens, the second air inlet adjustment valve is closed, and the first anti-surge return valve is closed, and the second anti-surge return valve is closed, and one
Section outlet stop valve is opened, and torch regulating valve is closed；When inlet end is when carrying out atmospheric pressure more than or equal to threshold value:
Step 11, the second air inlet adjustment valve is opened；
Step 12, the first air inlet adjustment valve is turned down, so that the inlet pressure of one section of centrifugal compressor reduces, one section of centrifugation pressure
The outlet pressure of contracting machine also accordingly reduces；
Step 13, when the outlet pressure of one section of centrifugal compressor is decreased below equal to inlet end when carrying out atmospheric pressure, by
The first anti-surge return valve is gradually opened, the second air inlet pipe collaborates node to two sections of centrifugal compressor tonifying Qi, directly by four-way
To the first anti-surge return valve standard-sized sheet；
Step 14, the first air inlet adjustment valve is completely closed, one section outlet stop valve is closed, one section of centrifugal compressor is realized certainly
Circulation；
Step 15, torch regulating valve is opened, the self-circulating gas in one section of centrifugal compressor is vented by torch end, so that
One section of centrifugal compressor is in underrun state, is then shut off torch regulating valve, and switching is completed, two sections of centrifugal compressor lists
Only high load capacity work.
The detailed process of step 2 are as follows:
Original state, one section of centrifugal compressor underload work, two sections of centrifugal compressor high load capacity work, the first air inlet tune
It saves valve to close, the second air inlet adjustment valve is opened, and the first anti-surge return valve is opened, and the second anti-surge return valve closes
It closes, one section outlet stop valve is closed, and torch regulating valve is closed；When inlet end is when carrying out atmospheric pressure less than threshold value:
Step 21, one section outlet stop valve is fully opened；
Step 22, the first air inlet adjustment valve is fully opened；
Step 23, the first anti-surge return valve is gradually turned down, one section of centrifugal compressor outlet pressure gradually rises；
Step 24, after one section of centrifugal compressor outlet pressure is more than or equal to the admission pressure of two sections of centrifugal compressors, the
Two air inlet pipe, which are in two sections of centrifugal compressors, stops tonifying Qi state, closes the second air inlet adjustment valve, and switching is completed, one section of centrifugation
Compressor and the high load capacity work simultaneously of two sections of centrifugal compressors.
The threshold value is the mid-range value of uniaxial Systems of Centrifugal Compressor Unit inlet pressure variation.
Compared with prior art, the present invention having the following technical effect that
(I) compressor set of the invention has widened the inlet pressure fluctuation condition range that uniaxial centrifugal compressor adapts to, especially
Total demand pressure ratio variation caused by it is suitable for the variation because of inlet pressure improves entirety in the section situation of 2 times or more
Operational energy efficiency is horizontal.
(II) present invention is suitable for input pressure fluctuation range wide (it is required that compressor operating pressure ratio variation range is big)
Actual gas is pressurized to output pressure and the constant chemical-process of the flow hardware configuration and operation of uniaxial Systems of Centrifugal Compressor Unit
Method, by the implementation of this hardware configuration scheme and operating method, expand inlet pressure range that unit can adapt to and
Improve whole operating condition actual operating efficiency.
(III) operating method of the invention passes through the operating mode for changing compressor, to realize mentioning for compressor operational efficiency
Height, while the change of this compressor operating mode carries out online.When compressor admission pressure increases, compressor is needed
The pressure ratio of work is with regard to low: when changing little, the mode that proposed adoption variable speed is adjusted efficiently is adjusted；And work as inlet pressure
When fluctuating excessive, the impeller progression effectively to be worked by decreasing or increasing compressor actual participation, and allow and be not involved in effective work
Impeller be under underload operation to reduce unit driving machine power consumption, to improve system effectiveness.
(IV) online non-stopping switching may be implemented in operating method of the invention, may be implemented when process system requirement pressure
When contracting machine rate of discharge and constant pressure, the inlet pressure fluctuation range that uniaxial Systems of Centrifugal Compressor Unit can adapt to is widened, simultaneously
It improves and is deviateing the unit operation efficiency in the biggish operating condition of design conditions.What this allocation plan and operating method implemented
Solution is that the range that inlet pressure fluctuates is divided into two sections, allows the admission pressure of compressor set in different sections
Inside take different operating modes: i.e. pressure ratio situation, distribution participate in the quantity for the compressor stage being effectively pressurized according to actual needs.
And the small range of inlet pressure fluctuates in a certain section, then the scheme adjusted using variable speed.
Detailed description of the invention
Fig. 1 is integrated connection relation schematic diagram of the invention.
The meaning of each label in figure are as follows: mono- section of centrifugal compressor of 1-, bis- sections of centrifugal compressors of 2-, the first air inlet pipe of 3-,
The first escape pipe of 4-, the second air inlet pipe of 5-, the second escape pipe of 6-, 7- inlet end, the first air inlet adjustment valve of 8-, 9- torch end, 10-
First cooler, 11- four-way forking node, 12- torch regulating valve, the second air inlet adjustment valve of 13-, bis- sections of breather check valves of 14-,
15- four-way collaborates node, the outlet side 16-, the second cooler of 17-, 18- the first anti-surge return valve, the second anti-surge of 19-
Return valve, 20- one section outlet stop valve, 21- one section outlet check valve, 22- booster engine, 23- frequency control motor.
Explanation is further explained in detail to particular content of the invention with reference to embodiments.
Specific embodiment
How to improve compressor it is big in inlet pressure fluctuation and when requiring outlet pressure and constant flow, deviate design conditions
Each operating condition under compressor operational efficiency, while can be realized on-line control operating condition be the present invention concern the problem of.This hair
Bright scheme is used to realize that the compressor when technique requires outlet pressure and flow is constant and inlet pressure variation range is wide is comprehensive
Operational efficiency is closed, user's energy consumption is reduced.It is this because inlet pressure changes, the maximum pressure ratio of caused compressor output is at least most
The 2 times or more of small pressure ratio.
Specific embodiments of the present invention are given below, it should be noted that the invention is not limited to implement in detail below
Example, all equivalent transformations made on the basis of the technical solutions of the present application each fall within protection scope of the present invention.
Embodiment 1:
In compliance with the above technical solution, as shown in Figure 1, the present embodiment provides a kind of uniaxial Systems of Centrifugal Compressor Unit, including single shaft
Two-part centrifugal compressor, the uniaxial two-part centrifugal compressor are divided into one section of centrifugal compressor 1 and two sections of centrifugal compresseds
Machine 2 is provided with the first air inlet pipe 3 and the first escape pipe 4, two sections of centrifugal compresseds on one section of centrifugal compressor 1
The second air inlet pipe 5 and the second escape pipe 6 are connected on machine 2；
First air inlet pipe 3 has been sequentially connected in series the first air inlet adjustment between 7 to one sections of centrifugal compressors of inlet end 1
Valve 8；First escape pipe 4 is from one section of centrifugal compressor 1 to being sequentially connected in series the first cooler 10, four between torch end 9
Logical forking node 11 and torch regulating valve 12；
Second air inlet pipe 5 has been sequentially connected in series the second air inlet adjustment between 7 to two sections of centrifugal compressors of inlet end 2
13, two sections of breather check valves 14 of valve and four-way collaborate node 15；Second escape pipe 6 is from two sections of centrifugal compressors 2 to out
The second cooler 17 is in series between gas end 16；
The reflux of the first anti-surge is connected between the four-way forking node 11 and the entrance of one section of centrifugal compressor 1 to adjust
Save valve 18；The second anti-surge return valve is connected between the four-way interflow node 15 and the outlet of the second cooler 17
19；One section outlet stop valve 20 has been sequentially connected in series between the four-way forking node 11 and four-way interflow node 15 and one section goes out
Mouth check valve 21.
As a kind of preferred embodiment of the present embodiment, uniaxial two-part centrifugal compressor passes through booster engine 22 and frequency control
Motor 23 drives.Specific driving method can adjust according to the actual situation.
Embodiment 2:
The present embodiment provides a kind of low energy consumption operating method of uniaxial Systems of Centrifugal Compressor Unit, and this method uses such as embodiment 1
The uniaxial Systems of Centrifugal Compressor Unit, real-time monitoring inlet end 7 carry out atmospheric pressure, this method specifically includes the following steps:
Step 1, when inlet end 7 is when carrying out atmospheric pressure more than or equal to threshold value, uniaxial Systems of Centrifugal Compressor Unit is pressed from one section of centrifugation
High load capacity works to the two sections of independent high load capacity of centrifugal compressor 2 work switchings simultaneously for contracting machine 1 and two sections of centrifugal compressors 2, this is cut
Changing process is not shut down switching online；
The detailed process of step 1 are as follows:
Original state, one section of centrifugal compressor 1 and the high load capacity work simultaneously of two sections of centrifugal compressors 2, the first air inlet adjustment
Valve 8 is opened, and the second air inlet adjustment valve 13 is closed, and the first anti-surge return valve 18 is closed, the second anti-surge return valve
19 close, and one section outlet stop valve 20 is opened, and torch regulating valve 12 is closed；Carry out atmospheric pressure more than or equal to threshold value when inlet end 7
When:
Step 11, the second air inlet adjustment valve 13 is opened；
Step 12, the first air inlet adjustment valve 8 is turned down, so that the inlet pressure of one section of centrifugal compressor 1 reduces, one section of centrifugation
The outlet pressure of compressor 1 also accordingly reduces；
Step 13, when the outlet pressure of one section of centrifugal compressor 1 is decreased below equal to inlet end 7 when carrying out atmospheric pressure,
It is gradually opened the first anti-surge return valve 18, the second air inlet pipe 5 collaborates node 15 to two sections of centrifugal compressors 2 by four-way
Tonifying Qi, until 18 standard-sized sheet of the first anti-surge return valve；
Step 14, the first air inlet adjustment valve 8 is completely closed, one section outlet stop valve 20 is closed, one section of centrifugal compressor 1 is real
Existing self-loopa；
Step 15, torch regulating valve 12 is opened, the self-circulating gas in one section of centrifugal compressor 1 is vented by torch end 9,
So that one section of centrifugal compressor 1 is in underrun state, it is then shut off torch regulating valve 12, switching is completed, two sections of centrifugations
The work of the independent high load capacity of compressor 2.
Step 2, when inlet end 7 is when carrying out atmospheric pressure less than threshold value, uniaxial Systems of Centrifugal Compressor Unit is from two sections of centrifugal compressors
2 independent high load capacities work to one section of centrifugal compressor 1 and the switching of high load capacity work simultaneously of two sections of centrifugal compressors 2, the switching
Journey is not shut down switching online.
The detailed process of step 2 are as follows:
Original state, one section of 1 underload of centrifugal compressor work, two sections of 2 high load capacity of centrifugal compressor work, the first air inlet
Regulating valve 8 is closed, and the second air inlet adjustment valve 13 is opened, and the first anti-surge return valve 18 is opened, and the reflux of the second anti-surge is adjusted
It saves valve 19 to close, one section outlet stop valve 20 is closed, and torch regulating valve 12 is closed；Carry out atmospheric pressure less than threshold value when inlet end 7
When:
Step 21, one section outlet stop valve 20 is fully opened；
Step 22, the first air inlet adjustment valve 8 is fully opened；
Step 23, the first anti-surge return valve 18 is gradually turned down, one section of 1 outlet pressure of centrifugal compressor gradually rises
It is high；
Step 24, after one section of 1 outlet pressure of centrifugal compressor is more than or equal to the admission pressure of two sections of centrifugal compressors 2,
Second air inlet pipe 5, which is in two sections of centrifugal compressors 2, stops tonifying Qi state, closes the second air inlet adjustment valve 13, and switching is completed, and one
Section centrifugal compressor 1 and the high load capacity work simultaneously of two sections of centrifugal compressors 2.
As a kind of preferred embodiment of the present embodiment, threshold value is the intermediate model of uniaxial Systems of Centrifugal Compressor Unit inlet pressure variation
Value is enclosed, frequent switching is avoided.
In the present embodiment, two sections of breather check valves 14 realize that uniaxial Systems of Centrifugal Compressor Unit is independent from two sections of centrifugal compressors 2
It is automatic to hinder during high load capacity works to one section of centrifugal compressor 1 and the switching of high load capacity work simultaneously of two sections of centrifugal compressors 2
It is disconnected when one section of 1 outlet process atmospheric pressure of centrifugal compressor constantly increases, by the second air inlet pipe 5 to one section of centrifugal compressor 1
The adverse current of entrance.
In the present embodiment, this configuration of one section outlet check valve 21 can after realize when one section of centrifugal compressor 1 and two sections
When the high load capacity work simultaneously of centrifugal compressor 2, the high pressure gas that automatic barrier is come in by the second air inlet pipe 5 is countercurrently centrifuged to one section
Compressor 1 realizes the separation of one section of centrifugal compressor 1 and two sections of centrifugal compressors 2.
In the present embodiment, the first anti-surge return valve 18 and the second anti-surge return valve 19 realize two sections
Independent Anti-surge Control and operation control, to realize when two sections of independent high load capacities of centrifugal compressor 2 work, two sections of centrifugation pressures
Contracting machine 2 is capable of the operation of individual secure.
In the present embodiment, one section outlet stop valve 20 realizes that one section of centrifugal compressor 1 is anti-when low-pressure is from reflux operation
Only high pressure gas leaks to one section of centrifugal compressor centrifugal compressor 1 by one section outlet check valve 21, causes the increase of energy consumption.
The calculating of concrete application example is analyzed:
Such as certain gas pressure regulating station arrangement, compressor operating medium is natural gas, operating flux 45000Nm/h, entrance
Pressure range is 4.5bar.A~16bar.A, and outlet pressure requires to stabilize to 28bar.A (when ignoring practical application here
Variation of the outlet pressure of permission in a small range).Inlet temperature and temperature after cooling are 40 DEG C.
According to examples detailed above, the Design compression ratio of compressor is 28/4.5=6.2, and the demand minimum pressure ratio of actual motion is
28/16=1.75.Centrifugal compressor is designed as two-stage structure, and centre has cooler, distributes one section of centrifugal compressor design pressure
Than 2.5, two sections centrifugal compressor Design compression ratios are that 2.48 (matching that multistage designs pressure ratios at different levels is generally suitable, according to practical institute
The Stage of choosing is fine-tuning to realize design maximum power efficiency), each section of polytropic efficiency of the compressor being generally capable of up to are as follows: one
Section centrifugal compressor 85%, two sections of centrifugal compressors 75% (general value, it is different according to the efficiency of Stage, difference is actually had,
But difference is little).
Meanwhile common engineering, using upper, the efficient adjustable range of the variable speed of two-stage compressor is 80%~100% (grade
Number is more, and range is narrower), therefore two sections under above-mentioned condition work at the same time variable speed and efficiently adjust, pressure ratio adjustable range is
4.96~6.2.
Based on examples detailed above, then the intermediate point threshold value converted is selected as 11bar.A~12bar.A, i.e. admission pressure gradually becomes
Only two sections of centrifugal compressor boost modes are switched to when big to more than 12bar.A, are lower than when admission pressure gradually decreases value
Two sections of compressor boost mode simultaneously is switched to when 11bar.A, intermediate range is the transition section of confirmation switching, is avoided the occurrence of
If only setting control system frequent switching of the value when admission pressure is near the value.
Simulation calculating is carried out using ASPEN-HYSYS.
Demand compressor maximum output operating condition shaft power when compressor inlet pressure is 4.5bar.A are as follows: one section of centrifugation
Compressor 1752kw, two sections of centrifugal compressor 1984kw；Comprehensive shaft power 3736kw.It is depressurized or is flowed back using inlet throttle and adjusted
The scheme of section, compressor shaft power will not change；
And variable speed is used to adjust, when inlet pressure can be achieved efficiently in 4.5~5.65bar.A (pressure ratio 4.96~6.2)
It adjusts, it is assumed that the efficiency that each section of adjustment process compressor does not change (practical deviate design point can small reduction).Its minimal compression
Shaft power is calculated as that (compressor inlet pressure 5.65bar.A, outlet pressure is constant, the adjustment of one section of centrifugal compressor pressure ratio
It is 2.23,2.22) two sections of centrifugal compressor pressure ratios are: one section of centrifugal compressor 1508kw, two sections of centrifugal compressor 1705kw, it is comprehensive
Sympodium power 3213kw；
When using the present invention program, since one section of centrifugal compressor self-operating work condition state is difficult to determine, it is assumed that it is consumed
Function is that (practical by operation, the power consumption of one section of centrifugal compressor is certain to lower than the value 1705kw, but because actual compressor is run
State complex can not be calculated accurately, temporarily press not energy-efficient consideration herein), two sections of centrifugal compressor original Design compression ratios are
2.48, variable speed, which is carried out, in section adjusts, by the 80% minimum high efficiency range of estimation, for pressure ratio 1.98, corresponding two sections at this time
Centrifugal compressor inlet pressure is 28/1.98bar.A=14.14bar.A.When two sections of centrifugal compressor admission pressures are
When 14.14bar.A, the maximum operation shaft power that can obtain two sections of centrifugal compressors is only 1247kw；Comprehensive shaft power is 2952kw.
To sum up, using the present invention program, the simulation operating condition of tentative calculation, relatively current existing conventional combination regulating measure,
Estimation reduces energy consumption at least 261kw, comprehensive energy consumption reduced rate > 8.12%.And the value does not include the low function of one section of centrifugal compressor also
Consumption runs brought energy-saving effect.
Claims (6)
1. a kind of single shaft Systems of Centrifugal Compressor Unit, including uniaxial two-part centrifugal compressor, the uniaxial two-part centrifugal compressed
Machine is divided into one section of centrifugal compressor (1) and two sections of centrifugal compressors (2), which is characterized in that one section of centrifugal compressor (1)
On be provided with the first air inlet pipe (3) and the first escape pipe (4), be connected with the second air inlet on two sections of centrifugal compressors (2)
Manage (5) and the second escape pipe (6)；
First air inlet pipe (3) has been sequentially connected in series the first air inlet tune from inlet end (7) between one section of centrifugal compressor (1)
It saves valve (8)；First escape pipe (4) is cold from one section of centrifugal compressor (1) to being sequentially connected in series first between torch end (9)
But device (10), four-way forking node (11) and torch regulating valve (12)；
Second air inlet pipe (5) has been sequentially connected in series the second air inlet tune from inlet end (7) between two sections of centrifugal compressors (2)
Save valve (13), two sections of breather check valves (14) and four-way interflow node (15)；Second escape pipe (6) is pressed from two sections of centrifugations
Contracting machine (2) is to being in series with the second cooler (17) between outlet side (16)；
The reflux of the first anti-surge is connected between the entrance of the four-way forking node (11) and one section of centrifugal compressor (1) to adjust
It saves valve (18)；The reflux of the second anti-surge is connected between four-way interflow node (15) and the outlet of the second cooler (17)
Regulating valve (19)；One section outlet cutting has been sequentially connected in series between the four-way forking node (11) and four-way interflow node (15)
Valve (20) and one section outlet check valve (21).
2. single shaft Systems of Centrifugal Compressor Unit as described in claim 1, which is characterized in that the uniaxial two-part centrifugal compressor
It is driven by booster engine (22) and frequency control motor (23).
3. a kind of low energy consumption operating method of single shaft Systems of Centrifugal Compressor Unit, which is characterized in that this method is used such as claim 1 institute
The uniaxial Systems of Centrifugal Compressor Unit stated, real-time monitoring inlet end (7) carry out atmospheric pressure, this method specifically includes the following steps:
Step 1, when inlet end (7) is when carrying out atmospheric pressure more than or equal to threshold value, uniaxial Systems of Centrifugal Compressor Unit is from one section of centrifugal compressed
High load capacity works to the individually high load capacity work switching of two sections of centrifugal compressors (2) simultaneously for machine (1) and two sections of centrifugal compressors (2),
The handoff procedure is not shut down switching online；
Step 2, when inlet end (7) is when carrying out atmospheric pressure less than threshold value, uniaxial Systems of Centrifugal Compressor Unit is from two sections of centrifugal compressors
(2) individually high load capacity works to one section of centrifugal compressor (1) and the switching of high load capacity work simultaneously of two sections of centrifugal compressors (2), should
Handoff procedure is not shut down switching online.
4. the low energy consumption operating method of single shaft Systems of Centrifugal Compressor Unit as claimed in claim 3, which is characterized in that the tool of step 1
Body process are as follows:
Original state, one section of centrifugal compressor (1) and the high load capacity work simultaneously of two sections of centrifugal compressors (2), the first air inlet adjustment
Valve (8) is opened, and the second air inlet adjustment valve (13) is closed, and the first anti-surge return valve (18) is closed, the reflux of the second anti-surge
Regulating valve (19) is closed, and one section outlet stop valve (20) is opened, and torch regulating valve (12) is closed；Carry out air pressure when inlet end (7)
When power is more than or equal to threshold value:
Step 11, the second air inlet adjustment valve (13) are opened；
Step 12, the first air inlet adjustment valve (8) are turned down, so that the inlet pressure of one section of centrifugal compressor (1) reduces, one section of centrifugation
The outlet pressure of compressor (1) also accordingly reduces；
Step 13, when the outlet pressure of one section of centrifugal compressor (1) is decreased below equal to inlet end (7) when carrying out atmospheric pressure,
It is gradually opened the first anti-surge return valve (18), the second air inlet pipe (5) is by four-way interflow node (15) to two sections of centrifugations
Compressor (2) tonifying Qi, until first anti-surge return valve (18) standard-sized sheet；
Step 14, it completely closes the first air inlet adjustment valve (8), closes one section outlet stop valve (20), one section of centrifugal compressor (1)
Realize self-loopa；
Step 15, torch regulating valve (12) are opened, the self-circulating gas in one section of centrifugal compressor (1) is put by torch end (9)
Sky is then shut off torch regulating valve (12) so that one section of centrifugal compressor (1) is in underrun state, and switching is completed, and two
Section centrifugal compressor (2) individually high load capacity work.
5. the low energy consumption operating method of single shaft Systems of Centrifugal Compressor Unit as claimed in claim 3, which is characterized in that the tool of step 2
Body process are as follows:
Original state, one section of centrifugal compressor (1) underload work, two sections of centrifugal compressor (2) high load capacity work, the first air inlet
Regulating valve (8) is closed, and the second air inlet adjustment valve (13) is opened, and the first anti-surge return valve (18) is opened, the second anti-surge
Return valve (19) is closed, and one section outlet stop valve (20) is closed, and torch regulating valve (12) is closed；When coming for inlet end (7)
When atmospheric pressure is less than threshold value:
Step 21, one section outlet stop valve (20) are fully opened；
Step 22, the first air inlet adjustment valve (8) are fully opened；
Step 23, the first anti-surge return valve (18) is gradually turned down, one section of centrifugal compressor (1) outlet pressure gradually rises
It is high；
Step 24, after one section of centrifugal compressor (1) outlet pressure is more than or equal to the admission pressure of two sections of centrifugal compressors (2),
Second air inlet pipe (5), which is in two sections of centrifugal compressors (2), stops tonifying Qi state, closes the second air inlet adjustment valve (13), switching
It completes, one section of centrifugal compressor (1) and the high load capacity work simultaneously of two sections of centrifugal compressors (2).
6. the low energy consumption operating method of single shaft Systems of Centrifugal Compressor Unit as claimed in claim 3, which is characterized in that the threshold value
For the mid-range value of uniaxial Systems of Centrifugal Compressor Unit inlet pressure variation.
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| CN114165425A (en) * | 2021-11-05 | 2022-03-11 | 蚌埠市联合压缩机制造有限公司 | Full-automatic variable working condition compressor |
| CN114352499A (en) * | 2022-01-11 | 2022-04-15 | 重庆通用工业(集团)有限责任公司 | Air-supplementing mixed anti-surge control method for compressor |
| CN114718660A (en) * | 2022-03-16 | 2022-07-08 | 河南龙宇煤化工有限公司 | Working system of turbine carbon dioxide centrifugal compressor unit and driving method thereof |
| CN114876846A (en) * | 2022-06-01 | 2022-08-09 | 西安陕鼓动力股份有限公司 | Full-automatic constant pressure control system and control method for centrifugal compressor unit |
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