CN116221191B - Method of controlling a fluid compression system - Google Patents
Method of controlling a fluid compression system Download PDFInfo
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- CN116221191B CN116221191B CN202310505333.9A CN202310505333A CN116221191B CN 116221191 B CN116221191 B CN 116221191B CN 202310505333 A CN202310505333 A CN 202310505333A CN 116221191 B CN116221191 B CN 116221191B
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- compressor
- surge valve
- valve
- surge
- fluid
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- 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
- F04D27/02—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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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention provides a method of controlling a fluid compression system comprising the steps of: providing a first anti-surge valve; providing a second anti-surge valve; control with the controller, including: when the compressor requires a reflux flow in a first preset range, the first anti-surge valve is in a first opening range, and the second anti-surge valve is in a closed state; when the compressor requires a reflux flow rate in a second preset range, the first anti-surge valve is in a second opening range, and the second anti-surge valve is in a third opening range; when the compressor requires a third predetermined range of backflow flow, the first anti-surge valve is fully opened, the second anti-surge valve is in a fourth range of degrees, the minimum value of the second predetermined range is greater than the maximum value of the first predetermined range, and the minimum value of the third predetermined range is greater than the maximum value of the second predetermined range. According to the method, cooperative work of the two anti-surge valves is realized through the branch control logic, and surge of the compressor is effectively restrained.
Description
Technical Field
The present invention relates to the field of compressors, and in particular to a method of controlling a fluid compression system.
Background
Currently, the primary discharge line of heat pump compressors is too large in size, e.g., 48 inches, resulting in the inability of existing anti-surge valves to be properly utilized in the discharge lines of current heat pump compressors.
Some heat pump compressors of the prior art have a primary outlet line that is a line and an anti-surge valve. The valve can only be selected for a specific type (Globe type) of valve due to the piping arrangement of the heat pump compressor and the requirement of anti-surge control linearity. However, currently on the market, valve suppliers do not have this particular type of anti-surge valve product of such a large size.
Disclosure of Invention
In view of the foregoing, the present invention is directed to a fluid compression system and method of controlling a fluid compression system that is capable of effectively suppressing surge of a compressor, particularly a relatively large heat pump compressor.
According to an aspect of the present invention, there is provided a fluid compression system, in particular, comprising:
a compressor having a compressor inlet in communication with an input line for supplying fluid to be compressed and a compressor outlet in communication with an output line for delivering compressed fluid;
a first anti-surge valve disposed in a first return line, a first end of the first return line being in communication with the input line and a second end of the first return line being in communication with the output line;
a second anti-surge valve disposed in a second return line, a first end of the second return line being in communication with the input line and a second end of the second return line being in communication with the output line;
a controller that adjusts the opening of the first anti-surge valve based on the operating condition of the compressor, thereby adjusting the through-flow capacity of the first return line, and/or adjusts the opening of the second anti-surge valve based on the operating condition of the compressor, thereby adjusting the through-flow capacity of the second return line, thereby suppressing surging of the compressor;
wherein the fluid compression system further comprises:
a first set of sensors mounted in the input line and configured to detect a first set of parameters of the fluid to be compressed; and
a second set of sensors mounted in the output line and configured to detect a second set of parameters of the compressed fluid;
the controller establishes signal connection with the first group of sensors and the second group of sensors to obtain the first group of parameters and the second group of parameters, and calculates to obtain information representing the working condition of the compressor based on the first group of parameters and the second group of parameters, so that the controller controls the first anti-surge valve and the second anti-surge valve based on the information to inhibit the compressor from surging.
In an exemplary embodiment, the controller is configured to:
when the compressor requires a first predetermined range of backflow flows, the controller at least partially opens the first anti-surge valve such that compressed fluid is at least partially backflow to the compressor inlet via the first backflow line;
when the compressor requires a second predetermined range of backflow flows, the controller at least partially opens the second anti-surge valve while at least partially opening the first anti-surge valve, such that compressed fluid is at least partially backflow to the compressor inlet via the first and second backflow lines,
wherein a minimum value of the second predetermined range is greater than a maximum value of the first predetermined range.
In an exemplary embodiment, the controller is configured to:
when the compressor requires the reflux flow in the first preset range, the first anti-surge valve is in a first opening range, and the second anti-surge valve is in a closed state;
when the compressor requires the reflux flow rate in the second preset range, the first anti-surge valve is in a second opening range which is further opened than the first opening range, and the second anti-surge valve is in a third opening range;
when the compressor requires a third predetermined range of backflow flow, the first anti-surge valve is fully open, the second anti-surge valve is in a fourth range of opening further than the third range of opening,
wherein a minimum value of the third predetermined range is greater than a maximum value of the second predetermined range.
In an exemplary embodiment, the first predetermined range of reflux flows refers to reflux flows that account for greater than 0% and less than 40% of the compressed fluid; the second predetermined range of reflux flows refers to reflux flows that account for greater than or equal to 40% and less than 60% of the compressed fluid; and the third predetermined range of reflux flow rates refers to reflux flow rates that account for greater than or equal to 60% and less than or equal to 100% of the compressed fluid.
In an exemplary embodiment, the first set of sensors includes:
an inlet pressure sensor for detecting an inlet pressure of a fluid to be compressed at an inlet of the compressor;
an inlet temperature sensor for detecting an inlet temperature of a fluid to be compressed at an inlet of the compressor;
and the second set of sensors comprises:
an outlet pressure sensor for detecting an outlet pressure of the compressed fluid at an outlet of the compressor;
an outlet temperature sensor for detecting an outlet temperature of the compressed fluid at the outlet of the compressor;
a flow sensor for detecting a flow of compressed fluid at an outlet of the compressor.
In an exemplary embodiment, the first anti-surge valve includes a first positioner capable of proportionally controlling an opening degree of the first anti-surge valve under the control of the controller, and a first solenoid valve capable of controlling the first anti-surge valve to enter a fully open state under the control of the controller in a predetermined emergency;
the second anti-surge valve comprises a second positioner and a second electromagnetic valve, the second positioner can proportionally control the opening degree of the second anti-surge valve under the control of the controller, and the second electromagnetic valve can control the second anti-surge valve to enter a full-open state under the control of the controller under the preset emergency condition.
In an exemplary embodiment, the first and second return lines are two parallel lines, the first and second return lines are each 36 inches in diameter, and the first and second anti-surge valves have the same maximum flow capacity, and the valve paths of the first and second anti-surge valves are both 24 inches.
According to another aspect of the present invention there is provided a method of controlling a fluid compression system comprising a compressor having a compressor inlet in communication with an input line for supplying fluid to be compressed and a compressor outlet in communication with an output line for delivering compressed fluid, in particular the method comprising the steps of:
providing a first anti-surge valve disposed in a first return line, a first end of the first return line being in communication with the input line and a second end of the first return line being in communication with the output line;
providing a second anti-surge valve disposed in a second return line, a first end of the second return line being in communication with the input line and a second end of the second return line being in communication with the output line;
a step of controlling by a controller, wherein the controller adjusts the opening degree of the first anti-surge valve and/or the opening degree of the second anti-surge valve based on the working condition of the compressor, so as to adjust the through-flow capacity of the first return pipeline and/or the through-flow capacity of the second return pipeline, thereby inhibiting the compressor from surging;
wherein the step of controlling by the controller comprises the steps of:
detecting a first set of parameters of the fluid to be compressed with a first set of sensors installed in the input line;
detecting a second set of parameters of the compressed fluid with a second set of sensors mounted in the output line; and
the first set of parameters and the second set of parameters are communicated to the controller, and the controller calculates based on the first set of parameters and the second set of parameters to obtain information indicative of an operating condition of the compressor, such that the controller controls the first anti-surge valve and the second anti-surge valve based on the information to inhibit surge of the compressor.
In an exemplary embodiment, the step of controlling with the controller includes the steps of:
when the compressor requires a first predetermined range of backflow flows, the controller at least partially opens the first anti-surge valve such that compressed fluid is at least partially backflow to the compressor inlet via the first backflow line;
when the compressor requires a second predetermined range of backflow flows, the controller at least partially opens the second anti-surge valve while at least partially opening the first anti-surge valve, such that compressed fluid is at least partially backflow to the compressor inlet via the first and second backflow lines,
wherein a minimum value of the second predetermined range is greater than a maximum value of the first predetermined range.
In an exemplary embodiment, when the compressor requires the first predetermined range of backflow flow, the first anti-surge valve is in a first opening range and the second anti-surge valve is in a closed state;
when the compressor requires the reflux flow rate in the second preset range, the first anti-surge valve is in a second opening range which is further opened than the first opening range, and the second anti-surge valve is in a third opening range;
when the compressor requires a third predetermined range of backflow flow, the first anti-surge valve is fully open, the second anti-surge valve is in a fourth range of opening further than the third range of opening,
wherein a minimum value of the third predetermined range is greater than a maximum value of the second predetermined range.
In an exemplary embodiment, the first predetermined range of reflux flows refers to reflux flows that account for greater than 0% and less than 40% of the compressed fluid; the second predetermined range of reflux flows refers to reflux flows that account for greater than or equal to 40% and less than 60% of the compressed fluid; and the third predetermined range of reflux flow rates refers to reflux flow rates that account for greater than or equal to 60% and less than or equal to 100% of the compressed fluid.
In an exemplary embodiment, the method includes the steps of:
detecting an inlet pressure of a fluid to be compressed at an inlet of the compressor with an inlet pressure sensor of the first set of sensors;
detecting an inlet temperature of a fluid to be compressed at an inlet of the compressor with an inlet temperature sensor of the first set of sensors;
detecting an outlet pressure of the compressed fluid at an outlet of the compressor with an outlet pressure sensor of the second set of sensors;
detecting an outlet temperature of the compressed fluid at an outlet of the compressor with an outlet temperature sensor of the second set of sensors;
and detecting a flow of compressed fluid at an outlet of the compressor with a flow sensor of the second set of sensors.
At least the following advantageous technical effects can be achieved by the fluid compression system and the method of controlling a fluid compression system of the present invention.
First, by changing the prior art from using one relatively large anti-surge valve to two relatively small anti-surge valves, the one-stage exhaust full flow backflow control of the heat pump compressor is achieved.
And secondly, the cooperative work of the first anti-surge valve and the second anti-surge valve is realized through the branch control logic, so that the surge of the compressor is effectively inhibited, and the aim of saving energy is also realized.
Third, due to the reduced size of the return line, it is convenient to optimize the line layout.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:
fig. 1 is a schematic diagram of the various components of a fluid compression system according to an exemplary embodiment of the present invention.
Fig. 2 is a schematic illustration of the modes of operation of a first anti-surge valve and a second anti-surge valve of a fluid compression system according to one exemplary embodiment of the invention.
FIG. 3 is a graphical representation of the performance of a compressor in a fluid compression system under different operating conditions according to an exemplary embodiment of the present invention.
Fig. 4 is a flow chart of a method of controlling a fluid compression system according to an exemplary embodiment of the invention, wherein the general steps of the method are shown.
Fig. 5 is a flow chart of a method of controlling a fluid compression system according to an exemplary embodiment of the invention, wherein sub-steps of one of the steps of the method are shown.
Detailed Description
The present invention will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is intended to include the plural unless the context clearly indicates otherwise.
Referring first to fig. 1, a schematic diagram of the various components of a fluid compression system according to an exemplary embodiment of the present invention is shown. The fluid compression system mainly comprises a compressor 1, a first anti-surge valve 2, a second anti-surge valve 3 and a controller 8.
The compressor 1 has a compressor inlet in communication with an inlet line 4 for supplying the fluid to be compressed and a compressor outlet in communication with an outlet line 5 for delivering the compressed fluid. The compressor 1 is, for example, a heat pump compressor, in particular a relatively large heat pump compressor, for example a primary discharge line of 48 inches in diameter. The fluid to be compressed may be supplied as a gas or as a liquid. Also shown in fig. 1 is a source 14 of fluid to be compressed and a compressed fluid destination 15.
Referring to fig. 1, the first anti-surge valve 2 is arranged in a first return line 6, a first end of the first return line 6 being in communication with the inlet line 4 and a second end of the first return line 6 being in communication with the outlet line 5. The second anti-surge valve 3 is arranged in a second return line 7, a first end of the second return line 7 being in communication with the inlet line 4 and a second end of the second return line 7 being in communication with the outlet line 5. The controller 8 adjusts the opening of the first anti-surge valve 2 and thus the flow capacity of the first return line 6 based on the operating conditions of the compressor 1 and/or adjusts the opening of the second anti-surge valve 3 and thus the flow capacity of the second return line 7 based on the operating conditions of the compressor 1 to suppress surging of the compressor 1.
Referring to fig. 1, the operating condition of the compressor 1 may be obtained using sensors. In particular, the fluid compression system of the present invention includes a first set of sensors and a second set of sensors. A first set of sensors is mounted in the input line 4 and configured to detect a first set of parameters of the fluid to be compressed; a second set of sensors is mounted in the output line 5 and configured to detect a second set of parameters of the compressed fluid. The controller 8 establishes signal connection with the first and second sets of sensors to obtain the first and second sets of parameters, and the controller 8 calculates based on the first and second sets of parameters to obtain information indicative of the operating condition of the compressor 1, and the controller 8 controls the first and second anti-surge valves 2 and 3 based on the information to suppress surging of the compressor 1.
Still referring to fig. 1, the first set of sensors includes: an inlet pressure sensor 10 for detecting an inlet pressure of a fluid to be compressed at an inlet of the compressor 1; an inlet temperature sensor 9 for detecting an inlet temperature of fluid to be compressed at an inlet of the compressor 1; and the second set of sensors comprises: an outlet pressure sensor 11 for detecting an outlet pressure of the compressed fluid at the outlet of the compressor 1; an outlet temperature sensor 13 for detecting an outlet temperature of the compressed fluid at the outlet of the compressor 1; a flow sensor 12 for detecting the flow of compressed fluid at the outlet of the compressor 1.
Referring to fig. 2, a schematic diagram of the operating modes of a first anti-surge valve and a second anti-surge valve of a fluid compression system according to one exemplary embodiment of the invention is shown. In fig. 2, the abscissa indicates the required backflow flow rate of the compressor 1 calculated by the controller based on the operation condition of the engine, and at the origin of coordinates, the required backflow flow rate of the compressor 1 is indicated as 0, and at the position where the coordinate value at the rightmost side of the abscissa is indicated as 1, the required backflow flow rate of the compressor 1 is indicated as 100%. In fig. 2, the ordinate indicates the opening degree of the anti-surge valve, and at the origin of the ordinate, the opening degree of the anti-surge valve is 0, that is, the anti-surge valve is in a completely closed state, and at the position where the uppermost coordinate value of the ordinate is 1, the opening degree of the anti-surge valve is 1, that is, the anti-surge valve is 100% open, and in a completely opened state. Fig. 2 shows an opening line L1 of the first anti-surge valve, which represents a case where the opening of the first anti-surge valve 2 changes with an increase in the backflow flow rate required by the compressor. Fig. 2 shows an opening line L2 of the second anti-surge valve, which represents a case where the opening of the second anti-surge valve 3 changes with an increase in the backflow flow rate required by the compressor.
Referring to fig. 2, the controller 8 may be generally configured to control the operation of the first anti-surge valve 2 and the second anti-surge valve 3 in the following manner. When the compressor 1 requires a first predetermined range of backflow flows (e.g., greater than 0% and less than 40% of the backflow flows of the compressed fluid shown in fig. 2), the controller 8 at least partially opens the first anti-surge valve 2 such that the compressed fluid is at least partially backflow to the compressor inlet via the first backflow line 6, the first anti-surge valve 2 is in the first opening range, and the second anti-surge valve 3 is in the closed state.
When the compressor 1 requires a second predetermined range of backflow flows (e.g., greater than or equal to 40% and less than 60% of the backflow flows of the compressed fluid shown in fig. 2), the controller 8 at least partially opens the second anti-surge valve 3 while at least partially opening the first anti-surge valve 2 such that the compressed fluid is at least partially backflow to the compressor inlet via both the first and second backflow lines 6, 7, the first anti-surge valve 2 being in a second opening range that is further open than the first opening range, the second anti-surge valve 3 being in a third opening range.
When the compressor 1 requires a third predetermined range of backflow flows (e.g., greater than or equal to 60% and less than or equal to 100% of the backflow flows of the compressed fluid shown in fig. 2), the first anti-surge valve 2 is fully open, and the second anti-surge valve 3 is in a fourth range of degrees that is further open than the third range of degrees of opening, wherein the minimum value of the third predetermined range is greater than the maximum value of the second predetermined range.
It is understood that the first predetermined range of reflux flow, the second predetermined range of reflux flow, the third predetermined range of reflux flow may be appropriately adjusted according to the specific application scenario of the compressor, etc.
Referring to fig. 1, the first anti-surge valve 2 may include a first positioner 21 and a first solenoid valve 22, the first positioner 21 being capable of proportionally controlling the opening degree of the first anti-surge valve 2 under the control of the controller 8, and the first solenoid valve 22 being capable of controlling the first anti-surge valve 2 to enter a full-open state under the control of the controller 8 in a predetermined emergency (e.g., unsafe state such as severe surge). The first rapid full open control line 25 in fig. 1 connects the controller 8 with the first solenoid valve 22 to send a control signal to the first solenoid valve 22 to control the first valve body 24 of the first anti-surge valve 2 to be rapidly fully opened in a predetermined emergency. The first proportional opening control line 26 in fig. 1 connects the controller 8 with the first positioner 21. The first anti-surge valve 2 further comprises a first actuator 23, which first actuator 23 is adapted to drive the operation of a first valve body 24.
Referring to fig. 1, the second anti-surge valve 3 may include a second positioner 31 and a second solenoid valve 32, the second positioner 31 being capable of proportionally controlling the opening degree of the second anti-surge valve 3 under the control of the controller 8, and the second solenoid valve 32 being capable of controlling the second anti-surge valve 3 to enter a full-open state under the control of the controller 8 in a predetermined emergency (e.g., unsafe state such as severe surge). The second rapid full open control line 36 in fig. 1 connects the controller 8 with the second solenoid valve 32 to send a control signal to the second solenoid valve 32 to control the second valve body 34 of the second anti-surge valve 3 to be rapidly fully opened in a predetermined emergency. A second proportional opening control line 35 in fig. 2 connects the controller 8 with the second positioner 31. The second anti-surge valve 3 further comprises a second actuator 33, which second actuator 33 is adapted to drive the operation of the second valve body 34.
The first return line 6 and the second return line 7 of the present invention may be two parallel lines, the diameters of the first return line 6 and the second return line 7 may be 36 inches, and the first anti-surge valve 2 and the second anti-surge valve 3 may have the same maximum flow capacity, and the valve path of the first anti-surge valve 2 and the valve path of the second anti-surge valve 3 may be 24 inches. Of course, the diameters of the first return line 6 and the second return line 7, as well as the valve path of the first anti-surge valve 2 and the valve path of the second anti-surge valve 3, can be appropriately adjusted according to the compressor.
Referring to fig. 3, a schematic diagram of a performance curve of a compressor in a fluid compression system under different conditions is shown according to an exemplary embodiment of the present invention. In fig. 3, the abscissa represents the variation of the flow rate V of the compressor, and the ordinate represents the ratio between the outlet pressure P1 of the compressor and the inlet pressure P2 of the compressor. Fig. 3 shows a surge line L3, a control line L4, a choke line L5. The area above the surge line L3 in fig. 3 represents the area of the compressor in a dangerous state of excessive surge, the hatched area between the surge line L3 and the control line L4 in fig. 3 represents the area of the compressor in a general surge state, and the area between the control line L4 and the choke line L5 in fig. 3 represents the area of the compressor in a normal operation state. Referring to fig. 3, if the engine is operating in the region of point a, it is necessary to control the fluid compression system to inhibit surge of the compressor, thereby returning the compressor to normal operation in the region of point B.
The operation of the fluid compression system of the present invention will now be briefly described with reference to fig. 3. The anti-surge control algorithm is implemented in a controller of the compressor, the controller utilizing a first set of sensors and a second set of sensors to collect process parameters of the compressor site in real time, comprising: inlet temperature and inlet pressure, and outlet flow, outlet temperature and outlet pressure. The specific mathematical model is as follows: h=f (Pd, ps, ts).
Wherein: h is the venturi differential pressure (converted compressor flow) and is the standard state value compensated by temperature and pressure. Pd is the outlet pressure of the compressor. Ps is the inlet pressure of the compressor. Ts is the inlet temperature of the compressor and is used to compensate to ensure that changes in the system medium do not affect the anti-surge protection.
When the compressor is surging, the solution is achieved by supplementing the compressor inlet with the amount of backflow. The corresponding anti-surge valve starts to act in the opening direction, so that corresponding compressed fluid (such as compressed gas) flows back to the inlet of the compressor, the air quantity of the inlet of the compressor is increased, and the compressor is controlled to fall from the point A in the dangerous state to the point B in the normal working area, so that the safety of the compressor is ensured, and the anti-surge purpose is achieved.
The controller sets the anti-surge curve according to the parameters of the compressor performance curve (generally, theoretical calculated values). In the algorithm of the controller, the controller adopts three different control loops to adapt to the loop response time change and the working point movement rate change in the characteristic curve.
Referring to fig. 4, a flow chart of a method of controlling a fluid compression system is shown, wherein the general steps of the method are shown, according to an exemplary embodiment of the invention. The method comprises the following steps: a first step S10 of providing a first anti-surge valve 2 arranged in the first return line 6, a first end of the first return line 6 being in communication with the input line 4 and a second end of the first return line 6 being in communication with the output line 5; a second step S20 of providing a second anti-surge valve 3 arranged in the second return line 7, the first end of the second return line 7 being in communication with the input line 4 and the second end of the second return line 7 being in communication with the output line 5; a third step S30, namely, a step of controlling by a controller: the controller 8 adjusts the opening degree of the first anti-surge valve 2 and/or the opening degree of the second anti-surge valve 3 based on the operation condition of the compressor 1, and further adjusts the flow capacity of the first return line 6 and/or the flow capacity of the second return line 7 to suppress surging of the compressor 1.
Referring to fig. 5, the third step S30 of the controller controlling may specifically include the following sub-steps: a first sub-step S301 of the third step; a second sub-step S302 of the third step; and a third sub-step S303 of the third step.
In a first sub-step S301 of the third step, when the compressor 1 requires a first predetermined range of backflow flows, the controller opens the first anti-surge valve 2 at least partially so that the compressed fluid is at least partially backflow to the compressor inlet via the first backflow line 6; wherein the first anti-surge valve 2 is in a first opening range and the second anti-surge valve 3 is in a closed state.
In a second sub-step S302 of the third step, when the compressor 1 requires a second predetermined range of backflow flows, the controller at least partially opens the second anti-surge valve 3 while at least partially opening the first anti-surge valve 2, so that the compressed fluid is at least partially backflow to the compressor inlet via both the first and second backflow lines 6, 7; wherein the first anti-surge valve 2 is in a second opening range that is further opened than the first opening range, and the second anti-surge valve 3 is in a third opening range;
in a third sub-step S303 of the third step, when the compressor 1 requires a third predetermined range of backflow flows, the first anti-surge valve 2 is fully opened and the second anti-surge valve 3 is in a fourth range of degrees of opening further than the third range of degrees of opening.
According to the method of controlling a fluid compression system of the present invention, the first predetermined range of reflux flow rate may refer to a reflux flow rate of greater than 0% and less than 40% of the compressed fluid; the second predetermined range of reflux flows may refer to reflux flows that account for greater than or equal to 40% and less than 60% of the compressed fluid; and the third predetermined range of reflux flows may refer to reflux flows that account for greater than or equal to 60% and less than or equal to 100% of the compressed fluid.
The third step S30 of the method of controlling a fluid compression system according to the present invention may include the steps of: detecting a first set of parameters of the fluid to be compressed with a first set of sensors installed in the input line 4; detecting a second set of parameters of the compressed fluid with a second set of sensors mounted in the output line 5; and delivering the first and second sets of parameters to the controller 8, and the controller 8 calculating based on the first and second sets of parameters to obtain information indicative of the operating condition of the compressor 1, such that the controller 8 controls the first and second anti-surge valves 2, 3 based on the information to inhibit surging of the compressor 1.
The third step S30 of the method of controlling a fluid compression system according to the present invention may include the steps of: detecting an inlet pressure of a fluid to be compressed at an inlet of the compressor 1 using an inlet pressure sensor 10; detecting an inlet temperature of a fluid to be compressed at an inlet of the compressor 1 using an inlet temperature sensor 9; detecting an outlet pressure of the compressed fluid at the outlet of the compressor 1 using an outlet pressure sensor 11; detecting an outlet temperature of the compressed fluid at the outlet of the compressor 1 using an outlet temperature sensor 13; and the flow of the compressed fluid at the outlet of the compressor 1 is detected by means of the flow sensor 12.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. A method of controlling a fluid compression system comprising a compressor (1), the compressor (1) having a compressor inlet in communication with an input line (4) for supplying a fluid to be compressed and a compressor outlet in communication with an output line (5) for delivering a compressed fluid, characterized in that the method comprises the steps of:
-providing a first anti-surge valve (2) arranged in a first return line (6), a first end of the first return line (6) being in communication with the input line (4) and a second end of the first return line (6) being in communication with the output line (5);
-providing a second anti-surge valve (3) arranged in a second return line (7), a first end of the second return line (7) being in communication with the input line (4) and a second end of the second return line (7) being in communication with the output line (5);
a step of controlling by a controller, wherein the controller (8) adjusts the opening degree of the first anti-surge valve (2) and/or the opening degree of the second anti-surge valve (3) based on the working condition of the compressor (1), and further adjusts the through-flow capacity of the first return line (6) and/or the through-flow capacity of the second return line (7) so as to inhibit surging of the compressor (1);
wherein the step of controlling by the controller comprises the steps of:
detecting a first set of parameters of the fluid to be compressed with a first set of sensors installed in the input line (4);
detecting a second set of parameters of the compressed fluid with a second set of sensors installed in the output line (5); and
-transmitting the first and second sets of parameters to the controller (8), and-the controller (8) calculating based on the first and second sets of parameters to obtain information representative of the operating condition of the compressor (1), whereby the controller (8) controls the first and second anti-surge valves (2, 3) based on said information to suppress surging of the compressor (1),
wherein the step of controlling by the controller comprises the steps of:
-when the compressor (1) requires a first predetermined range of reflux flow, the first anti-surge valve (2) is in a first opening range, the second anti-surge valve (3) is in a closed state, such that compressed fluid is at least partially refluxed to the compressor inlet via the first reflux line (6);
-when the compressor (1) requires a second predetermined range of reflux flow, the first anti-surge valve (2) is in a second opening range which is further open than the first opening range, the second anti-surge valve (3) is in a third opening range, such that compressed fluid is at least partly refluxed to the compressor inlet via the first reflux line (6) and the second reflux line (7);
when the compressor (1) requires a third predetermined range of reflux flow, the first anti-surge valve (2) is fully open, the second anti-surge valve (3) is in a fourth range of degrees that is further open than the third range of degrees of opening,
wherein the minimum value of the second predetermined range is greater than the maximum value of the first predetermined range,
wherein a minimum value of the third predetermined range is greater than a maximum value of the second predetermined range.
2. The method of controlling a fluid compression system of claim 1,
the first predetermined range of reflux flows refers to reflux flows that account for more than 0% and less than 40% of the compressed fluid;
the second predetermined range of reflux flows refers to reflux flows that account for greater than or equal to 40% and less than 60% of the compressed fluid;
and the third predetermined range of reflux flow rates refers to reflux flow rates that account for greater than or equal to 60% and less than or equal to 100% of the compressed fluid.
3. The method of controlling a fluid compression system of claim 1, comprising the steps of:
detecting an inlet pressure of a fluid to be compressed at an inlet of the compressor (1) with an inlet pressure sensor (10) of the first set of sensors;
-detecting an inlet temperature of a fluid to be compressed at an inlet of the compressor (1) with an inlet temperature sensor (9) of the first set of sensors;
detecting an outlet pressure of the compressed fluid at the outlet of the compressor (1) with an outlet pressure sensor (11) of the second set of sensors;
detecting an outlet temperature of the compressed fluid at the outlet of the compressor (1) with an outlet temperature sensor (13) of the second set of sensors;
and detecting the flow of compressed fluid at the outlet of the compressor (1) with a flow sensor (12) of the second set of sensors.
4. A method of controlling a fluid compression system according to any one of claims 1 to 3,
the first anti-surge valve (2) comprises a first positioner (21) and a first electromagnetic valve (22), the first positioner (21) can proportionally control the opening degree of the first anti-surge valve (2) under the control of the controller (8), and the first electromagnetic valve (22) can control the first anti-surge valve (2) to enter a full-open state under the control of the controller (8) under the preset emergency condition;
the second anti-surge valve (3) comprises a second positioner (31) and a second electromagnetic valve (32), the second positioner (31) can proportionally control the opening degree of the second anti-surge valve (3) under the control of the controller (8), and the second electromagnetic valve (32) can control the second anti-surge valve (3) to enter a full-open state under the control of the controller (8) under the preset emergency condition.
5. A method of controlling a fluid compression system according to any one of claims 1 to 3,
the first return line (6) and the second return line (7) are two parallel arranged lines, the diameters of the first return line (6) and the second return line (7) are 36 inches, the first anti-surge valve (2) and the second anti-surge valve (3) have the same maximum through-flow capacity, and the valve diameter of the first anti-surge valve (2) and the valve diameter of the second anti-surge valve (3) are 24 inches.
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Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0024823A1 (en) * | 1979-08-22 | 1981-03-11 | Imperial Chemical Industries Plc | Compressor surge control method and apparatus |
| EP0162652B1 (en) * | 1984-05-14 | 1991-05-15 | Dresser Industries,Inc. | System, apparatus, and method for detecting and controlling surge in a turbo compressor |
| DE19860639A1 (en) * | 1998-12-29 | 2000-07-06 | Man Turbomasch Ag Ghh Borsig | Method for operating a compressor with a downstream consumer, and system operating according to the method |
| US7096669B2 (en) * | 2004-01-13 | 2006-08-29 | Compressor Controls Corp. | Method and apparatus for the prevention of critical process variable excursions in one or more turbomachines |
| US8152496B2 (en) * | 2008-05-02 | 2012-04-10 | Solar Turbines Inc. | Continuing compressor operation through redundant algorithms |
| IT1396001B1 (en) * | 2009-04-28 | 2012-11-09 | Nuovo Pignone Spa | ENERGY RECOVERY SYSTEM IN A GAS COMPRESSION PLANT |
| US9624936B2 (en) * | 2012-05-16 | 2017-04-18 | Compressor Controls Corporation | Turbocompressor antisurge control by vibration monitoring |
| CN102878100B (en) * | 2012-09-21 | 2014-12-24 | 西安陕鼓动力股份有限公司 | Control method for preventing surging generated during normal halting of single-shaft purified terephthalic acid (PTA) compressor unit |
| CN105370629B (en) * | 2014-08-26 | 2017-08-04 | 沈阳鼓风机集团自动控制系统工程有限公司 | PTA device energy recovery control methods |
| CN105257580A (en) * | 2015-11-17 | 2016-01-20 | 神华集团有限责任公司 | Control system and method used for reaction gas compressor |
| KR102551338B1 (en) * | 2016-07-07 | 2023-07-05 | 한화에어로스페이스 주식회사 | Control system for compressor and method of controlling the compressor |
| CN106050722B (en) * | 2016-07-08 | 2018-01-19 | 西安交通大学 | Complete performance surge controlling method and system based on the principle of similitude |
| CN109458355B (en) * | 2018-02-14 | 2020-07-07 | 西门子工业透平机械（葫芦岛）有限公司 | Compressor surge control method and compressor surge control system |
| CN108506241B (en) * | 2018-03-21 | 2019-09-06 | 重庆江增船舶重工有限公司 | A kind of control method of compressor anti-asthma valve |
| CN111197593A (en) * | 2018-11-19 | 2020-05-26 | 宝山钢铁股份有限公司 | Air separation unit air compressor surge-proof blow-down valve control method |
| IT201900005554A1 (en) * | 2019-04-10 | 2020-10-10 | Nuovo Pignone Tecnologie Srl | COMPRESSION SYSTEM AND METHOD FOR THE CONTROL OF A COMPRESSION SYSTEM |
| CN111536069B (en) * | 2020-04-27 | 2021-11-30 | 上海电气鼓风机厂有限公司 | Anti-surge control method of single-stage high-speed centrifugal compressor |
| 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 |
| CN115614304A (en) * | 2022-08-31 | 2023-01-17 | 中国航发四川燃气涡轮研究院 | LADRC-based automatic grid-connected control method for high-altitude platform air extractor set |
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