CN110007698B - Method and system for controlling vibration of heat exchange tube of condenser - Google Patents
Method and system for controlling vibration of heat exchange tube of condenser Download PDFInfo
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- CN110007698B CN110007698B CN201910267015.7A CN201910267015A CN110007698B CN 110007698 B CN110007698 B CN 110007698B CN 201910267015 A CN201910267015 A CN 201910267015A CN 110007698 B CN110007698 B CN 110007698B
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Abstract
The embodiment of the invention provides a method and a system for controlling vibration of a heat exchange tube of a condenser, wherein the peak frequency of the fluid pulsating pressure of cooling water in a cooling water inlet pipeline of the condenser is obtained in real time and is compared with the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of exhaust steam, when the peak frequency is close to or consistent with one of the natural frequency and the peak frequency of the fluid pulsating pressure of the exhaust steam, a certain volume fraction of gas is injected into the cooling water inlet pipeline, so that the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of the exhaust steam are avoided, the resonance of the heat exchange tube is avoided, and the vibration control requirement under the condition of variable working conditions can be met due to dynamic control.
Description
Technical Field
The embodiment of the invention relates to the technical field of vibration control, in particular to a method and a system for controlling vibration of a heat exchange tube of a condenser.
Background
In a steam turbine system, exhaust steam of a steam turbine is subjected to heat exchange with cooling water in a condenser through a heat exchange pipe, the exhaust steam generally circulates on the shell side, and the cooling water circulates in the heat exchange pipe.
When the peak frequency of the pulsating pressure of the fluid at the cooling water inlet of the condenser is close to or consistent with the structural natural frequency of the heat exchange tube or the main peak frequency of the pulsating pressure of the exhaust steam fluid outside the heat exchange tube, the heat exchange tube of the condenser is caused to resonate, and the safety reliability and the service life of the condenser are reduced.
Generally, in the prior art, vibration control of a heat exchange tube of a condenser is performed through structural design of the condenser. However, the condenser cannot be adjusted after the structural design is finished, and cannot meet the vibration control requirement under the variable working condition.
Disclosure of Invention
Embodiments of the present invention provide a method and a system for controlling vibration of a heat exchange tube of a condenser, which overcome the above problems or at least partially solve the above problems.
In a first aspect, an embodiment of the present invention provides a method for controlling vibration of a heat exchange tube of a condenser, including:
acquiring the peak frequency of the fluid pulsating pressure of the cooling water in the pipeline of the cooling water inlet of the condenser;
acquiring an absolute value of a first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser, and acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser;
and if the absolute value of the first difference or the absolute value of the second difference is judged and obtained to be within a preset range, injecting gas with a preset volume fraction into the condenser cooling water inlet pipeline, so that the absolute value of the first difference and the absolute value of the second difference are both outside the preset range.
On the other hand, the embodiment of the invention provides a control system for vibration of a heat exchange tube of a condenser, which comprises the following components:
the acquisition module is used for acquiring the peak frequency of the fluid pulsating pressure of the cooling water in the cooling water inlet pipeline of the condenser;
the comparison module is used for acquiring an absolute value of a first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser and acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser;
and the control module is used for injecting gas with a preset volume fraction into the condenser cooling water inlet pipeline if the absolute value of the first difference or the absolute value of the second difference is judged to be within a preset range, so that the absolute values of the first difference and the second difference are outside the preset range.
In a third aspect, an embodiment of the present invention provides a control method for vibration of a heat exchange tube of a condenser, where the control method includes a processor, a communication interface, a memory, and a bus, where the processor and the communication interface complete mutual communication through the bus, and the processor may call a logic instruction in the memory to execute the control method for vibration of the heat exchange tube of the condenser provided in the first aspect.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, which stores computer instructions for causing a computer to execute the method for controlling vibration of a heat exchange tube of a condenser according to the first aspect.
The invention embodiment relates to a method and a system for controlling vibration of a heat exchange tube of a condenser, which are characterized in that the peak frequency of the fluid pulsating pressure of cooling water in a water inlet pipeline of the cooling water of the condenser is obtained in real time, the peak frequency is compared with the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of exhaust steam, and when the peak frequency is close to or consistent with one of the natural frequency and the peak frequency of the fluid pulsating pressure of the exhaust steam, a certain volume fraction of gas is injected into the water inlet pipeline of the cooling water, so that the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of the exhaust steam are avoided, and the resonance of the heat exchange tube is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for controlling vibration of a heat exchange tube of a condenser according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a condenser in an embodiment of the invention;
FIG. 3 is a time domain data of the pulsating pressure of the cooling water fluid collected by the pulsation sensor according to the embodiment of the present invention;
FIG. 4 is frequency domain data of pulsating pressure of cooling water fluid obtained after conversion by the control unit in the embodiment of the present invention;
FIG. 5 is a schematic diagram of the relationship between the gas phase fraction of the condenser cooling water inlet pipeline stored in the control unit and the frequency domain pulsating pressure data according to the embodiment of the present invention;
fig. 6 is a block diagram of a structure of a control system for vibration of a heat exchange tube of a condenser according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a method for controlling vibration of a heat exchange tube of a condenser according to an embodiment of the present invention, as shown in fig. 1, including:
s101, obtaining the peak frequency of the fluid pulsating pressure of cooling water in a cooling water inlet pipeline of the condenser;
s102, acquiring an absolute value of a first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser, and acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser;
and S103, if the absolute value of the first difference or the absolute value of the second difference is judged and obtained to be within a preset range, injecting gas with a preset volume fraction into a pipeline of a cooling water inlet of the condenser, so that the absolute value of the first difference and the absolute value of the second difference are both outside the preset range.
Firstly, the operation principle of the condenser is explained with reference to the attached figure 2: as shown in fig. 2, condenser cooling water 1 enters a condenser 3 through a cooling water inlet pipeline 2, and flows out of the condenser from a cooling water outlet pipeline 4 after exchanging heat with exhaust steam 5 in a heat exchange pipe 7, the exhaust steam 5 enters the condenser 3 through a condenser exhaust steam inlet pipeline 6, and flows out of the condenser from an exhaust steam outlet pipeline 8 after exchanging heat with the cooling water 1 in the heat exchange pipe 7 through the heat exchange pipe 7.
In S101, a plurality of frequency values of the fluid pulsating pressure of the cooling water in the cooling water inlet pipeline at each time may be obtained, and in order to ensure that the vibration control method is suitable for each frequency value of the fluid pulsating pressure of the cooling water, a maximum frequency value, that is, a peak frequency, among the plurality of frequency values is directly concerned.
In S102, an absolute value of a first difference between a peak frequency of the fluid pulsating pressure of the cooling water and a natural frequency of the heat exchange tubes of the condenser is obtained, that is, a proximity between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tubes is compared. And acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser, namely comparing the closeness degree of the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube. These two proximity levels will serve as triggers for subsequent injection of gas.
In step S103, if it is determined that the absolute value of the first difference or the absolute value of the second difference is within a preset range, that is, the peak frequency of the fluid pulsating pressure of the cooling water is close to or consistent with the natural frequency of the heat exchange tube of the condenser; or the peak frequency of the fluid pulsating pressure of the cooling water is close to or consistent with the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange pipe. The size of the preset range can be set according to actual working condition analysis. When one of the two conditions occurs. When the peak frequency of the fluid pulsating pressure of the cooling water is close to or consistent with the natural frequency of the heat exchange tube of the condenser, or the peak frequency of the fluid pulsating pressure of the cooling water is close to or consistent with the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube, the heat exchange tube is caused to resonate, namely the triggering condition of gas injection is achieved. And the injected gas changes the peak frequency of the fluid pulsating pressure of the cooling water, so that the peak frequency of the fluid pulsating pressure of the cooling water avoids the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube, namely, the absolute value of the first difference and the absolute value of the second difference are both outside the preset range, and the resonance of the heat exchange tube is avoided.
The injected gas is a gas insoluble or hardly soluble in cooling water, such as nitrogen, oxygen, hydrogen, or air.
Specifically, the peak frequency of the fluid pulsating pressure of the cooling water is obtained and compared with the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of the dead steam respectively. If the natural frequency of the heat exchange pipe is close to or consistent with the natural frequency of the heat exchange pipe, or the peak frequency of the fluid pulsating pressure of the dead steam is close to or consistent with the peak frequency of the fluid pulsating pressure of the dead steam, gas with a preset volume fraction is injected into the cooling water outlet pipeline, so that the peak frequency of the fluid pulsating pressure of the cooling water avoids the natural frequency of the heat exchange pipe and the peak frequency of the fluid pulsating pressure of the dead steam, and resonance of the heat exchange pipe is avoided. It is understood that the type of gas and the specific value of the preset volume fraction thereof may be determined according to actual conditions.
The invention embodiment a condenser heat exchange tube vibration control method, through obtaining the peak frequency of the fluid pulsating pressure of the cooling water in the condenser cooling water inlet pipeline in real time, and comparing the peak frequency with the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of the exhaust steam, when the peak frequency is close to or consistent with one of the natural frequency and the peak frequency of the fluid pulsating pressure of the exhaust steam, a certain volume fraction of gas is injected into the cooling water inlet pipeline, so that the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of the exhaust steam are avoided, and the resonance of the heat exchange tube is avoided.
In the above embodiment, the obtaining of the peak frequency of the fluid pulsating pressure of the cooling water in the pipeline of the cooling water inlet of the condenser specifically includes:
acquiring time domain data of fluid pulsating pressure of cooling water in a pipeline of a cooling water inlet of the condenser;
and converting the time domain data into frequency spectrum data, and obtaining the peak frequency of the fluid pulsating pressure of the cooling water according to the frequency spectrum data.
The method comprises the steps of acquiring time domain data of fluid pulsating pressure, converting the time domain data into frequency spectrum data in order to meet follow-up comparison requirements, and obtaining the peak frequency of the fluid pulsating pressure of the cooling water according to the frequency spectrum data.
In the above embodiment, the acquiring time domain data of the fluid pulsating pressure of the cooling water in the condenser cooling water inlet pipeline specifically includes:
and acquiring time domain data of the fluid pulsating pressure of the cooling water in the condenser cooling water inlet pipeline 2 through a pulsating pressure sensor 9 arranged on the cooling water inlet pipeline 2.
In the above embodiment, before injecting a preset volume fraction of gas into the condenser cooling water inlet pipeline, the method further includes:
and acquiring the preset volume fraction according to the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data, the natural frequency of the heat exchange tube of the condenser and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser.
And acquiring the one-to-one correspondence relationship between the frequency of the pulsating pressure of the cooling water after gas injection and the volume fraction of the injected gas in the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data.
In the above embodiment, the obtaining the preset volume fraction according to the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data, the natural frequency of the heat exchange tube of the condenser, and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser specifically includes:
obtaining a plurality of volume fractions corresponding to frequency values different from the natural frequency of the heat exchange tube of the condenser and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser according to the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data;
selecting the preset volume fraction from the plurality of volume fractions.
Specifically, the principle of determining the preset volume fraction of the injected gas is that, after the gas of the volume fraction is injected, the peak frequency of the pulsating pressure of the cooling water is different from the natural frequency of the heat exchange pipe and the frequency of the peak frequency of the fluid pulsating pressure of the dead steam.
In the above embodiment, the natural frequency of the heat exchange tube of the condenser includes a multi-order natural frequency; accordingly, the number of the first and second electrodes,
the method for obtaining the absolute value of the first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser specifically comprises the following steps:
and respectively obtaining absolute values of a plurality of first difference values of the peak frequency of the fluid pulsating pressure of the cooling water and the multi-order natural frequency of the heat exchange tubes of the condenser.
Specifically, after injecting the gas with the preset volume fraction, the absolute values of the plurality of first differences and the absolute value of the second difference are both outside the preset range, in other words, the peak frequency of the fluid pulsating pressure of the cooling water is different from the multi-stage natural frequency of the heat exchange pipe and the peak frequency of the fluid pulsating pressure of the dead steam.
In the above embodiment, the injecting a gas with a preset volume fraction into the condenser cooling water inlet pipeline specifically includes:
and gas with preset volume fraction is injected into the condenser cooling water inlet pipeline 2 through a gas injection port 12 arranged on the cooling water inlet pipeline 2.
The following further describes embodiments of the present invention by way of examples, and it is to be understood that the embodiments of the present invention are not limited by the examples.
Under a certain working condition, referring to fig. 2 again, a pulsating pressure sensor 9 is arranged on the condenser cooling water inlet pipeline 2, pulsating pressure time domain data collected by the pulsating pressure sensor 9 is transmitted to a control unit 11 through a cable 10, the control unit 11 converts the received pulsating pressure time domain data into a frequency spectrum, and the collected pulsating pressure time domain data is shown in fig. 3.
The first-order natural frequency of the heat exchange tube 7 is 33Hz, the second-order natural frequency is 45Hz, and the third-order natural frequency is 70Hz, as shown in fig. 4, the peak frequency of the fluid pulsating pressure frequency spectrum is 45Hz, which is basically consistent with the second-order natural frequency of the heat exchange tube 7, and the fluid pulsating pressure frequency spectrum of the condenser cooling water inlet pipeline needs to be adjusted to enable the peak frequency to avoid the first 3-order natural frequency of the heat exchange tube 7.
The relation between the gas phase fraction and the pulsating pressure frequency spectrum peak frequency of the condenser cooling water inlet pipeline 2 is shown in fig. 5, and when the volume fraction is 0.5%, the fluid pulsating pressure frequency spectrum peak frequency is reduced to 40 Hz.
Gas accounting for 0.5% of cooling water flow is injected through a gas injection port 12 arranged on a condenser cooling water inlet pipeline 2, so that the peak frequency of a fluid pulsating pressure frequency spectrum can avoid the first 3-order natural frequency of a heat exchange tube 7, and the beneficial effects of weakening the vibration response of the heat exchange tube caused by the excitation of condenser cooling water, improving the safety and reliability of the condenser and prolonging the service life of the condenser are achieved.
Referring to fig. 2 again, a pulsating pressure sensor 9 is arranged on the condenser cooling water inlet pipeline 2, pulsating pressure time domain data collected by the pulsating pressure sensor 9 is transmitted to a control unit 11 through a cable 10, the control unit 11 converts the received pulsating pressure time domain data into a frequency spectrum, and the collected pulsating pressure time domain data is as shown in fig. 3.
The main peak frequency of the exhaust steam excitation outside the heat exchange tube 7 is 45.2Hz, as shown in fig. 4, the peak frequency of the pulsating pressure frequency spectrum of the cooling water fluid is 45Hz, which is close to the main peak frequency of the exhaust steam excitation outside the heat exchange tube 7, and the pulsating pressure frequency spectrum of the fluid at the cooling water inlet pipeline 2 of the flow condenser needs to be adjusted to make the peak frequency avoid the main peak frequency of the exhaust steam excitation outside the heat exchange tube 7.
The relationship between the gas phase fraction of the condenser cooling water inlet pipeline 2 and the peak frequency of the pulsating pressure frequency spectrum is shown in fig. 5, and when the volume fraction of the cooling water pipeline is 0.5%, the peak frequency of the fluid pulsating pressure frequency spectrum is 40 Hz.
Gas accounting for 0.5 percent of circulating water flow is injected through a gas injection port 12 arranged on a condenser cooling water inlet pipeline 2, so that the peak frequency of a fluid pulsating pressure frequency spectrum can avoid the main peak frequency of exhaust steam excitation outside the heat exchange tube 7, and the beneficial effects of weakening the vibration response of the heat exchange tube caused by the condenser cooling water excitation, improving the safety and reliability of the condenser and prolonging the service life of the condenser are achieved.
Fig. 6 is a block diagram of a structure of a system for controlling vibration of a heat exchange tube of a condenser according to an embodiment of the present invention, as shown in fig. 6, including: an acquisition module 601, a comparison module 602 and a control module 603. Wherein:
the acquisition module 601 is used for acquiring the peak frequency of the fluid pulsating pressure of the cooling water in the pipeline of the cooling water inlet of the condenser. The comparison module 602 is configured to obtain an absolute value of a first difference between a peak frequency of the fluid pulsating pressure of the cooling water and a natural frequency of the heat exchange tube of the condenser, and obtain an absolute value of a second difference between the peak frequency of the fluid pulsating pressure of the cooling water and a peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser. The control module 603 is configured to inject a gas with a preset volume fraction into the condenser cooling water inlet pipeline if it is determined that the absolute value of the first difference or the absolute value of the second difference is within a preset range, so that the absolute values of the first difference and the second difference are both outside the preset range.
The invention embodiment relates to a control system for vibration of a heat exchange tube of a condenser, which is characterized in that the peak frequency of the fluid pulsating pressure of cooling water in a cooling water inlet pipeline of the condenser is obtained in real time, and is compared with the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of exhaust steam, when the peak frequency is close to or consistent with one of the natural frequency and the peak frequency of the fluid pulsating pressure of the exhaust steam, a certain volume fraction of gas is injected into the cooling water inlet pipeline, so that the natural frequency of the heat exchange tube and the peak frequency of the fluid pulsating pressure of the exhaust steam are avoided, and the resonance of the heat exchange tube is avoided.
In the above embodiment, the acquisition module 601 is specifically configured to:
acquiring time domain data of fluid pulsating pressure of cooling water in a pipeline of a cooling water inlet of the condenser;
and converting the time domain data into frequency spectrum data, and obtaining the peak frequency of the fluid pulsating pressure of the cooling water according to the frequency spectrum data.
In the above embodiment, the acquisition module 601 is further configured to:
and acquiring time domain data of fluid pulsating pressure of the cooling water in the cooling water inlet pipeline of the condenser through a pulsating pressure sensor arranged on the cooling water inlet pipeline.
In the above embodiment, the system further includes a volume fraction obtaining module, configured to obtain the preset volume fraction according to a relationship between a gas phase fraction of the cooling water inlet pipeline and frequency domain pulsating pressure data, a natural frequency of the heat exchange tube of the condenser, and a peak frequency of a fluid pulsating pressure of the exhaust steam in the heat exchange tube of the condenser.
In the above embodiment, the volume fraction obtaining module is specifically configured to:
obtaining a plurality of volume fractions corresponding to frequency values different from the natural frequency of the heat exchange tube of the condenser and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser according to the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data;
selecting the preset volume fraction from the plurality of volume fractions.
In the above embodiment, the control module 603 is specifically configured to:
and injecting gas with preset volume fraction into the condenser cooling water inlet pipeline through a gas injection port arranged on the cooling water inlet pipeline.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 7, the electronic device includes: a processor (processor)701, a communication Interface (Communications Interface)702, a memory (memory)703 and a bus 704, wherein the processor 701, the communication Interface 702 and the memory 703 complete communication with each other through the bus 704. The processor 701 may invoke logic instructions in the memory 703 to perform methods including, for example: acquiring the peak frequency of the fluid pulsating pressure of the cooling water in the pipeline of the cooling water inlet of the condenser; acquiring an absolute value of a first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser, and acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser; and if the absolute value of the first difference or the absolute value of the second difference is judged and obtained to be within a preset range, injecting gas with a preset volume fraction into the condenser cooling water inlet pipeline, so that the absolute value of the first difference and the absolute value of the second difference are both outside the preset range.
The logic instructions in the memory 703 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: acquiring the peak frequency of the fluid pulsating pressure of the cooling water in the pipeline of the cooling water inlet of the condenser; acquiring an absolute value of a first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser, and acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser; and if the absolute value of the first difference or the absolute value of the second difference is judged and obtained to be within a preset range, injecting gas with a preset volume fraction into the condenser cooling water inlet pipeline, so that the absolute value of the first difference and the absolute value of the second difference are both outside the preset range.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the communication device and the like are merely illustrative, and units illustrated as separate components may or may not be physically separate, and components displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods of the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for controlling vibration of a heat exchange tube of a condenser is characterized by comprising the following steps:
acquiring the peak frequency of the fluid pulsating pressure of the cooling water in the pipeline of the cooling water inlet of the condenser;
acquiring an absolute value of a first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser, and acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser;
and if the absolute value of the first difference or the absolute value of the second difference is judged and obtained to be within a preset range, injecting gas with a preset volume fraction into the condenser cooling water inlet pipeline, so that the absolute value of the first difference and the absolute value of the second difference are both outside the preset range.
2. The method according to claim 1, wherein the obtaining of the peak frequency of the fluid pulsating pressure of the cooling water in the condenser cooling water inlet pipeline specifically comprises:
acquiring time domain data of fluid pulsating pressure of cooling water in a pipeline of a cooling water inlet of the condenser;
and converting the time domain data into frequency spectrum data, and obtaining the peak frequency of the fluid pulsating pressure of the cooling water according to the frequency spectrum data.
3. The method according to claim 2, wherein the acquiring time domain data of the fluid pulsating pressure of the cooling water in the condenser cooling water inlet pipeline specifically comprises:
and acquiring time domain data of fluid pulsating pressure of the cooling water in the cooling water inlet pipeline of the condenser through a pulsating pressure sensor arranged on the cooling water inlet pipeline.
4. The method of claim 1, further comprising, prior to injecting a predetermined volume fraction of gas into the condenser cooling water inlet line:
and acquiring the preset volume fraction according to the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data, the natural frequency of the heat exchange tube of the condenser and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser.
5. The method according to claim 4, wherein the obtaining the preset volume fraction according to the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data, the natural frequency of the heat exchange tube of the condenser and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser specifically comprises:
obtaining a plurality of volume fractions corresponding to frequency values different from the natural frequency of the heat exchange tube of the condenser and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser according to the relationship between the gas phase fraction of the cooling water inlet pipeline and the frequency domain pulsating pressure data;
selecting the preset volume fraction from the plurality of volume fractions.
6. The method of claim 1, wherein the natural frequencies of the condenser heat exchange tubes comprise multi-order natural frequencies; accordingly, the number of the first and second electrodes,
the method for obtaining the absolute value of the first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser specifically comprises the following steps:
and respectively obtaining absolute values of a plurality of first difference values of the peak frequency of the fluid pulsating pressure of the cooling water and the multi-order natural frequency of the heat exchange tubes of the condenser.
7. The method according to claim 1, wherein the step of injecting a preset volume fraction of gas into the condenser cooling water inlet pipeline comprises:
and injecting gas with preset volume fraction into the condenser cooling water inlet pipeline through a gas injection port arranged on the cooling water inlet pipeline.
8. The utility model provides a control system of condenser heat exchange tube vibration which characterized in that includes:
the acquisition module is used for acquiring the peak frequency of the fluid pulsating pressure of the cooling water in the cooling water inlet pipeline of the condenser;
the comparison module is used for acquiring an absolute value of a first difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the natural frequency of the heat exchange tube of the condenser and acquiring an absolute value of a second difference value between the peak frequency of the fluid pulsating pressure of the cooling water and the peak frequency of the fluid pulsating pressure of the dead steam in the heat exchange tube of the condenser;
and the control module is used for injecting gas with a preset volume fraction into the condenser cooling water inlet pipeline if the absolute value of the first difference or the absolute value of the second difference is judged to be within a preset range, so that the absolute values of the first difference and the second difference are outside the preset range.
9. An electronic device, comprising a processor, a communication interface, a memory and a bus, wherein the processor, the communication interface and the memory are communicated with each other through the bus, and the processor can call logic instructions in the memory to execute the method for controlling the vibration of the heat exchange tube of the condenser according to any one of claims 1 to 7.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the method for controlling vibration of a heat exchange tube of a condenser according to any one of claims 1 to 7.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05141891A (en) * | 1991-11-20 | 1993-06-08 | Toshiba Corp | Heat exchanger |
| CN101430247A (en) * | 2008-11-28 | 2009-05-13 | 华北电力大学 | Real-time diagnosis method for random vibration fault of steam generator set |
| JP2013164245A (en) * | 2012-02-13 | 2013-08-22 | Toshiba Corp | Steam condenser |
-
2019
- 2019-04-03 CN CN201910267015.7A patent/CN110007698B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05141891A (en) * | 1991-11-20 | 1993-06-08 | Toshiba Corp | Heat exchanger |
| CN101430247A (en) * | 2008-11-28 | 2009-05-13 | 华北电力大学 | Real-time diagnosis method for random vibration fault of steam generator set |
| JP2013164245A (en) * | 2012-02-13 | 2013-08-22 | Toshiba Corp | Steam condenser |
Non-Patent Citations (1)
| Title |
|---|
| 弯管中的气液两相流水击现象;王树立等;《西安石油大学学报》;20050131;全文 * |
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