CN117258326A - MVR evaporation system and control method and device thereof - Google Patents
MVR evaporation system and control method and device thereof Download PDFInfo
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- CN117258326A CN117258326A CN202311486927.6A CN202311486927A CN117258326A CN 117258326 A CN117258326 A CN 117258326A CN 202311486927 A CN202311486927 A CN 202311486927A CN 117258326 A CN117258326 A CN 117258326A
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- 238000007906 compression Methods 0.000 claims abstract description 18
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/28—Evaporating with vapour compression
- B01D1/2896—Control, regulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/28—Evaporating with vapour compression
- B01D1/2881—Compression specifications (e.g. pressure, temperature, processes)
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Abstract
The application provides an MVR evaporation system and a control method and a device thereof, wherein the system comprises: the combined control unit, the first evaporation subsystem and the second evaporation subsystem; the first and second evaporation subsystems comprise corresponding evaporators and vapor compressors, and the evaporators are connected with the vapor compressors through corresponding secondary vapor pipelines, heating vapor pipelines, emergency secondary vapor pipelines and emergency heating vapor pipelines; the combined control unit controls the operation condition of the MVR evaporation system based on the real-time working state information of the first and second evaporation subsystems so as to control the first and second evaporation subsystems to complete the first and second evaporation tasks; the compression capacity of the first and second vapor compressors can meet the requirements of the first and second evaporation tasks simultaneously, and the production efficiency can be improved while the work continuity is ensured.
Description
Technical Field
The application relates to the technical field of heat exchange equipment, in particular to an MVR evaporation system and a control method and device thereof.
Background
Due to the energy saving properties of MVR (MechanicalVapor Recompression ), more and more MVR evaporation systems are being used to replace the original multiple effect evaporation systems. The MVR compressor is a core component of the MVR evaporation system, and when the MVR compressor fails, the MVR evaporation system is directly caused to stop until the failure is removed, so that the working progress of the MVR evaporation system is greatly influenced.
In order to ensure the working continuity of the MVR evaporation systems in the prior art, two sets of MVR evaporation systems are usually arranged in a redundant mode, and when one set of MVR evaporation system fails, the other set of MVR evaporation system is started to continue the evaporation operation. However, the mode can lead to a set of MVR evaporation system to be always in an idle state under a fault-free working condition, and the continuity of evaporation work is ensured, but serious waste of production resources is caused, and the production efficiency is low.
Disclosure of Invention
The application provides an MVR evaporation system and a control method and device thereof, so that production resources are utilized to the maximum extent and production efficiency is improved on the basis of ensuring evaporation work continuity.
The present application provides an MVR evaporation system, the system comprising:
the combined control unit, the first evaporation subsystem and the second evaporation subsystem;
the first evaporation subsystem comprises a first evaporator and a first vapor compressor, the second evaporation subsystem comprises a second evaporator and a second vapor compressor, the first evaporator is connected with the first vapor compressor through a first secondary vapor pipeline and a first heating vapor pipeline, and the second evaporator is connected with the second vapor compressor through a second secondary vapor pipeline and a second heating vapor pipeline;
The first evaporator is also connected with the second vapor compressor through a first emergency secondary vapor pipeline and a first emergency heating vapor pipeline, and the second evaporator is also connected with the first vapor compressor through a second emergency secondary vapor pipeline and a second emergency heating vapor pipeline;
the combined control unit is used for controlling the operation working condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem so as to control the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
According to the MVR evaporation system provided by the application, based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem, the operation working condition of the MVR evaporation system is controlled, and the MVR evaporation system specifically comprises:
determining surge prediction results of the first and second vapor compressors based on real-time operating state information of the first and second evaporation subsystems;
And controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor.
According to the MVR evaporation system provided in the present application, the determining, based on real-time working state information of the first evaporation subsystem and the second evaporation subsystem, a surge prediction result of the first vapor compressor and the second vapor compressor specifically includes:
inputting real-time working state information of the first evaporation subsystem and the second evaporation subsystem into a trained compressor surge prediction model, and determining surge prediction results of the first vapor compressor and the second vapor compressor based on output of the compressor surge prediction model;
the compressor surge prediction model is obtained by training based on a pre-obtained real-time working state information sample of the first evaporation subsystem and the second evaporation subsystem and a corresponding surge time point label, wherein the working state information sample is working state information of a preset period before surge occurs.
According to the MVR evaporation system provided by the application, the real-time working state information of the first evaporation subsystem and the second evaporation subsystem comprises real-time operation parameters and maintenance information, wherein the real-time operation parameters comprise air inlet pressure, air outlet pressure, current, air inlet temperature, air outlet temperature and environmental temperature corresponding to the current moment vapor compressor, and the maintenance information comprises the time interval of a maintenance node at the current moment; the surge prediction result includes a target vapor compressor at which surge is imminent and a surge time point of the target vapor compressor.
According to the MVR evaporation system provided by the application, the operation conditions of the MVR evaporation system comprise a parallel condition and a cooperative condition; under the parallel working condition, the first evaporation subsystem independently executes the first evaporation task, and the second evaporation subsystem independently executes the second evaporation task; under the cooperative working condition, the first evaporation subsystem or the second evaporation subsystem synchronously executes a first evaporation task and a second evaporation task; correspondingly, the controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor specifically comprises:
if the surge prediction results of the first vapor compressor and the second vapor compressor do not comprise the target vapor compressor, controlling the MVR evaporation system to operate under a parallel working condition;
and if the surge prediction results of the first vapor compressor and the second vapor compressor comprise the target vapor compressor, controlling the MVR evaporation system to operate under a cooperative working condition.
According to the MVR evaporation system provided by the application, under the parallel working condition, the first secondary steam pipeline, the first heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are connected, and the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are closed; under the cooperative working condition, if the target steam compressor is a first steam compressor, the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are connected, and the first secondary steam pipeline, the first heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are closed; if the target steam compressor is a second steam compressor, the first secondary steam pipeline, the first heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are connected, and the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are closed.
The application also provides a control method of the MVR evaporation system, the method is applied to the combined control unit of the MVR evaporation system, and the method comprises the following steps:
controlling the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem;
controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
The present application also provides a control device of an MVR evaporation system, the device being applied to a combined control unit of an MVR evaporation system as described above, the device comprising:
the operation condition control module is used for controlling the operation condition of the MVR evaporation system based on the real-time working condition information of the first evaporation subsystem and the second evaporation subsystem;
the task execution module is used for controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation working condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
The present application also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of controlling an MVR evaporation system as described above.
The present application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of a method of controlling an MVR evaporation system as described above.
The MVR evaporation system and the control method and the device thereof provided by the application, wherein the system comprises: the combined control unit, the first evaporation subsystem and the second evaporation subsystem; the first evaporation subsystem comprises a first evaporator and a first vapor compressor, the second evaporation subsystem comprises a second evaporator and a second vapor compressor, the first evaporator is connected with the first vapor compressor through a first secondary vapor pipeline and a first heating vapor pipeline, and the second evaporator is connected with the second vapor compressor through a second secondary vapor pipeline and a second heating vapor pipeline; the first evaporator is also connected with the second vapor compressor through a first emergency secondary vapor pipeline and a first emergency heating vapor pipeline, and the second evaporator is also connected with the first vapor compressor through a second emergency secondary vapor pipeline and a second emergency heating vapor pipeline; the combined control unit is used for controlling the operation working condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem so as to control the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task at the same time, normal operation of the evaporation task can be guaranteed under the condition that any one evaporation subsystem fails and is stopped, production resources are utilized to the maximum extent on the basis of guaranteeing the continuity of evaporation work, and production efficiency is improved.
Drawings
For a clearer description of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the MVR evaporation system provided herein;
fig. 2 is a schematic flow chart of a control method of the MVR evaporation system provided in the present application;
fig. 3 is a schematic structural diagram of a control device of the MVR evaporation system provided in the present application;
fig. 4 is a schematic structural diagram of an electronic device provided in the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Fig. 1 is a schematic structural diagram of an MVR evaporation system provided in the present application, as shown in fig. 1, the system includes:
the combined control unit, the first evaporation subsystem and the second evaporation subsystem;
the first evaporation subsystem comprises a first evaporator and a first vapor compressor, the second evaporation subsystem comprises a second evaporator and a second vapor compressor, the first evaporator is connected with the first vapor compressor through a first secondary vapor pipeline and a first heating vapor pipeline, and the second evaporator is connected with the second vapor compressor through a second secondary vapor pipeline and a second heating vapor pipeline;
the first evaporator is also connected with the second vapor compressor through a first emergency secondary vapor pipeline and a first emergency heating vapor pipeline, and the second evaporator is also connected with the first vapor compressor through a second emergency secondary vapor pipeline and a second emergency heating vapor pipeline;
the combined control unit is used for controlling the operation working condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem so as to control the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
Specifically, it may be understood that the first evaporation subsystem and the second evaporation subsystem may further include a corresponding separator to remove liquid droplets entrained in the secondary steam, and may further include a corresponding circulation pump to implement circulation evaporation of the stock solution, where specific components thereof may be adjusted according to actual working requirements, and this embodiment of the present application is not limited specifically. The MVR evaporation system of the embodiments of the present application differs from the conventional redundant evaporation system in that: the first evaporator is further connected with the second steam compressor through a first emergency secondary steam pipeline and a first emergency heating steam pipeline, the second evaporator is further connected with the first steam compressor through a second emergency secondary steam pipeline and a second emergency heating steam pipeline, the compression capacities of the first steam compressor and the second steam compressor can meet the evaporation requirements of a first evaporation task and a second evaporation task simultaneously, and based on the evaporation requirements, when one of the steam compressors is stopped due to failure, the matched evaporator can be communicated with the other steam compressor through the emergency secondary steam pipeline and the emergency heating steam pipeline, and then synchronous execution of the first evaporation task and the second evaporation task can be achieved through the other steam compressor, so that production resources can be utilized to the maximum extent on the basis of guaranteeing the continuity of evaporation work, and the production efficiency is improved. It should be noted that the first evaporation task and the second evaporation task may be evaporation tasks of the same material, or evaporation tasks of different materials (in this case, removal of droplets entrained in the secondary steam may be achieved through a separator, so as to avoid mixing of different materials).
More specifically, the controlling the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem specifically includes:
determining surge prediction results of the first and second vapor compressors based on real-time operating state information of the first and second evaporation subsystems;
and controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor.
The determining the surge prediction results of the first vapor compressor and the second vapor compressor based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem specifically comprises:
inputting real-time working state information of the first evaporation subsystem and the second evaporation subsystem into a trained compressor surge prediction model, and determining surge prediction results of the first vapor compressor and the second vapor compressor based on output of the compressor surge prediction model;
the compressor surge prediction model is obtained by training based on a pre-obtained real-time working state information sample of the first evaporation subsystem and the second evaporation subsystem and a corresponding surge time point label, wherein the working state information sample is working state information of a preset period before surge occurs.
The real-time working state information of the first evaporation subsystem and the second evaporation subsystem comprises real-time operation parameters and maintenance information, wherein the real-time operation parameters comprise air inlet pressure, air outlet pressure, current, air inlet temperature, air outlet temperature and environment temperature corresponding to the current moment vapor compressor, and the maintenance information comprises a time interval of a maintenance node at the current moment; the surge prediction result includes a target vapor compressor at which surge is imminent and a surge time point of the target vapor compressor.
Based on the foregoing, it will be appreciated that the MVR compressor (i.e., the vapor compressor) is a core component of the MVR evaporation system, and when the MVR compressor fails, the MVR evaporation system will be directly stopped until the failure is eliminated, while the most significant failure of the MVR compressor is surge, and when the surge occurs, the structure of the MVR compressor will be seriously damaged, so once the surge is found, shutdown maintenance must be immediately performed to avoid damage to the MVR compressor. But because of the delay in the compressor from the execution of the shutdown command to the complete shutdown, unpredictable damage to the compressor may result. Based on the above, the embodiment of the application predicts the surge of the vapor compressor to perform emergency action in advance, so that the damage to the vapor compressor caused by the delay is avoided to the greatest extent. Specifically, in the prior art, surge prediction is generally carried out through monitoring of intake air flow, but the application finds out that the prediction of surge involves the relevant characteristics of multiple dimensions through research, and the accuracy of the surge prediction is low by simply relying on the intake air flow, so that the frequency of false locking of a steam compressor is improved, and the production efficiency is greatly influenced. Thus, the present application determines in advance all relevant features of the surge prediction by research, including in particular: the vapor compressor is provided with corresponding air inlet pressure, air outlet pressure, current, air inlet temperature, air outlet temperature and ambient temperature. Meanwhile, according to the method and the device, the performance parameters of the compressor are affected by the maintenance nodes, the longer the time elapsed after maintenance is carried out, the worse the performance of the compressor is, and the higher the corresponding surge occurrence probability is. All the relevant features are collectively called as the working state information of the evaporation system, and a training sample can be constructed to train a compressor surge prediction model for the surge prediction of the steam compressor based on the working state information.
More specifically, the compressor surge prediction model is obtained by training based on working state information samples of a first evaporation subsystem and a second evaporation subsystem, which are obtained in advance, and corresponding surge time point labels, wherein the working state information samples are working state information of a preset period before surge occurs. It can be understood that the working state information of a single time point is not enough to support accurate surge time point prediction, so that the working state information of a preset period before surge occurs is screened from the historical surge data of the first evaporation subsystem and the second evaporation subsystem in a model training stage, the corresponding surge time point is used as a training sample, the compressor surge prediction model can fully learn the change trend of the working state of the evaporation subsystem within a period of time before surge occurs, and acquire accurate surge symptom information from the change trend, so that the accurate prediction of surge is realized. The duration of the preset period can be adjusted according to actual needs, which is not particularly limited in the embodiment of the present application.
After the trained compressor surge prediction model is obtained, the surge prediction can be performed based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem. Based on the foregoing, it may be appreciated that the real-time working state information includes real-time operation parameters and maintenance information, where the real-time operation parameters include an air inlet pressure, an air outlet pressure, a current, an air inlet temperature, an air outlet temperature and an environmental temperature corresponding to the current time vapor compressor, and the maintenance information includes a time interval from the last maintenance node at the current time; the surge prediction result includes a target vapor compressor at which surge is imminent and a surge time point of the target vapor compressor. Based on the foregoing, it can be appreciated that the compressor surge prediction model performs a surge prediction based on real-time operating state information at a plurality of successive times during an actual prediction process.
Notably, the operating conditions of the MVR evaporation system include parallel conditions and collaborative conditions; under the parallel working condition, the first evaporation subsystem independently executes the first evaporation task, and the second evaporation subsystem independently executes the second evaporation task; under the cooperative working condition, the first evaporation subsystem or the second evaporation subsystem synchronously executes a first evaporation task and a second evaporation task; correspondingly, the controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor specifically comprises:
if the surge prediction results of the first vapor compressor and the second vapor compressor do not comprise the target vapor compressor, controlling the MVR evaporation system to operate under a parallel working condition;
and if the surge prediction results of the first vapor compressor and the second vapor compressor comprise the target vapor compressor, controlling the MVR evaporation system to operate under a cooperative working condition.
It can be understood that the larger the predicted time range is, the lower the accuracy of the predicted result is, based on this, in order to guarantee the accuracy of prediction to the maximum extent, in the embodiment of the present application, the preset period after the current moment is taken as the predicted time window, only when the model predicts that the vapor compressor will surge in the time window, the surge predicted result will include the target vapor compressor and the surge time point information of the target vapor compressor, based on this, the embodiment of the present application can perform accurate operation condition control based on the judging result of whether the surge predicted result includes the target vapor compressor, meanwhile, due to the existence of the time window, enough reaction time will be reserved for the operation condition adjustment, so as to avoid the vapor pressure compressor damage caused by the foregoing delay. The duration of the time window may be adjusted according to actual needs, which is not specifically limited in the embodiments of the present application.
On the basis of the above, under the parallel working condition, the first secondary steam pipeline, the first heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are communicated, and the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are closed; under the cooperative working condition, if the target steam compressor is a first steam compressor, the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are connected, and the first secondary steam pipeline, the first heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are closed; if the target steam compressor is a second steam compressor, the first secondary steam pipeline, the first heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are connected, and the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are closed. It will be appreciated that under coordinated conditions, the power of the non-target vapor compressor needs to be adjusted in addition to the on-off state of the piping to ensure that it can perform both the first and second evaporation tasks simultaneously. Meanwhile, the power supply of the target vapor compressor is cut off (namely, the target vapor compressor is stopped) so as to avoid damage to the target vapor compressor caused by surge, and the target vapor compressor is convenient to carry out subsequent overhaul and maintenance.
It has also been found through research that the surge of the vapor compressor is not necessarily due to a failure of the vapor compressor, and in some cases, an external disturbance may cause a transient surge of the vapor compressor, which is of a type that does not cause damage to the vapor compressor due to a short duration, and which can recover itself. In order to avoid the waste of overhaul and maintenance resources caused by the situation, the embodiment of the application can restart the target vapor compressor after controlling the MVR evaporation system to operate under the cooperative working condition.
Specifically, after the MVR evaporation system is controlled to run under the cooperative working condition, the residual completion time of the first evaporation task and the second evaporation task is firstly determined, and if the residual completion time does not exceed a preset threshold value, the MVR evaporation system is controlled to keep the cooperative working condition until the first evaporation task and the second evaporation task are completed. It will be appreciated that the non-target vapor compressor may not last too long due to its higher workload when operating in conjunction with conditions that would otherwise adversely affect its service life. Based on the maximum sustainable duration of the cooperative working condition is determined based on the performance parameters of the non-target vapor compressor, and the maximum sustainable duration is used as a preset threshold. If the remaining completion time is shorter (i.e., does not exceed the preset threshold), the target vapor compressor is not required to be restarted, and the first evaporation task and the second evaporation task are directly completed through the cooperative working condition, so that the production efficiency can be ensured to the maximum extent under the condition that the service life of the non-target vapor compressor is not influenced.
Otherwise, if the remaining completion time exceeds the preset threshold, restarting the target vapor compressor after the target vapor compressor is stopped, switching the MVR evaporation system into a parallel working condition after the target vapor compressor is stable (namely, reaches a required working state), and continuously performing surge prediction. If the target vapor compressor is detected to be about to surge secondarily (the target vapor compressor is indicated to have a fault) within the preset time range, the MVR evaporation system is switched to a cooperative working condition, the target vapor compressor is shut down for maintenance, and the MVR evaporation system is switched to a parallel working condition again under the condition that the maintenance of the target vapor compressor is completed and the residual completion time exceeds a preset threshold value. If the non-target vapor compressor is predicted to surge before the maintenance of the target vapor compressor is completed, opening an anti-surge valve of the non-target vapor compressor to eliminate the surge, and continuing to maintain the collaborative operation.
It can be appreciated that, since the opening of the anti-surge valve can cause the vapor compressor to fail to normally output secondary vapor, and reduce production efficiency, the embodiment of the application opens the anti-surge valve only under the condition that maintenance of the target vapor compressor is incomplete (i.e. unavailable) and the non-target vapor compressor is about to surge (facing an unavailable risk), so as to avoid production interruption caused by disabling both sets of evaporation subsystems under the condition of sacrificing certain production efficiency, thereby guaranteeing production efficiency to the maximum extent.
Based on the scheme, the synchronous execution of the first evaporation task and the second evaporation task can be realized through the other vapor compressor under the condition that any one vapor compressor is abnormal, so that the evaporation efficiency of the system under the abnormal condition is not affected, the two compressors are operated in parallel under the normal condition, the production efficiency of the system can be ensured to the maximum extent, and the idle condition of equipment is avoided.
The system provided by the embodiment of the application comprises: the combined control unit, the first evaporation subsystem and the second evaporation subsystem; the first evaporation subsystem comprises a first evaporator and a first vapor compressor, the second evaporation subsystem comprises a second evaporator and a second vapor compressor, the first evaporator is connected with the first vapor compressor through a first secondary vapor pipeline and a first heating vapor pipeline, and the second evaporator is connected with the second vapor compressor through a second secondary vapor pipeline and a second heating vapor pipeline; the first evaporator is also connected with the second vapor compressor through a first emergency secondary vapor pipeline and a first emergency heating vapor pipeline, and the second evaporator is also connected with the first vapor compressor through a second emergency secondary vapor pipeline and a second emergency heating vapor pipeline; the combined control unit is used for controlling the operation working condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem so as to control the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task at the same time, normal operation of the evaporation task can be guaranteed under the condition that any one evaporation subsystem fails and is stopped, production resources are utilized to the maximum extent on the basis of guaranteeing the continuity of evaporation work, and production efficiency is improved.
Fig. 2 is a schematic flow chart of a control method of an MVR evaporation system provided in the present application, where the method is applied to a joint control unit of the MVR evaporation system, as shown in fig. 2, and the method includes:
step 101, controlling the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem.
Step 102, controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
Specifically, the corresponding working principles and effects of the present invention are described in detail in the foregoing embodiments, and are not described herein.
According to the method provided by the embodiment of the application, the operation working condition of the MVR evaporation system is controlled based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem; controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task at the same time, normal operation of the evaporation task can be guaranteed under the condition that any one evaporation subsystem fails and is stopped, production resources are utilized to the maximum extent on the basis of guaranteeing the continuity of evaporation work, and production efficiency is improved.
Based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem, the operation working condition of the MVR evaporation system is controlled, and the method specifically comprises the following steps:
determining surge prediction results of the first and second vapor compressors based on real-time operating state information of the first and second evaporation subsystems;
and controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor.
The determining the surge prediction results of the first vapor compressor and the second vapor compressor based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem specifically comprises the following steps:
inputting real-time working state information of a first evaporation subsystem and a second evaporation subsystem into a trained compressor surge prediction model, and determining surge prediction results of the first vapor compressor and the second vapor compressor based on output of the compressor surge prediction model;
the compressor surge prediction model is obtained by training based on a pre-obtained real-time working state information sample of the first evaporation subsystem and the second evaporation subsystem and a corresponding surge time point label, wherein the working state information sample is working state information of a preset period before surge occurs.
The real-time working state information of the first evaporation subsystem and the second evaporation subsystem comprises real-time operation parameters and maintenance information, wherein the real-time operation parameters comprise air inlet pressure, air outlet pressure, current, air inlet temperature, air outlet temperature and environment temperature corresponding to the current moment vapor compressor, and the maintenance information comprises a time interval of a maintenance node at the current moment; the surge prediction result includes a target vapor compressor at which surge is imminent and a surge time point of the target vapor compressor.
The operation working conditions of the MVR evaporation system comprise a parallel working condition and a cooperative working condition; under the parallel working condition, the first evaporation subsystem independently executes the first evaporation task, and the second evaporation subsystem independently executes the second evaporation task; under the cooperative working condition, the first evaporation subsystem or the second evaporation subsystem synchronously executes a first evaporation task and a second evaporation task; correspondingly, the controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor specifically comprises:
if the surge prediction results of the first vapor compressor and the second vapor compressor do not comprise the target vapor compressor, controlling the MVR evaporation system to operate under a parallel working condition;
And if the surge prediction results of the first vapor compressor and the second vapor compressor comprise the target vapor compressor, controlling the MVR evaporation system to operate under a cooperative working condition.
After controlling the MVR evaporation system to operate under the cooperative working condition, the method further includes: and determining the residual completion time of the first evaporation task and the second evaporation task, and controlling the MVR evaporation system to keep the cooperative working condition until the first evaporation task and the second evaporation task are completed if the residual completion time does not exceed a preset threshold value.
And if the residual completion time exceeds a preset threshold, restarting the target vapor compressor after the target vapor compressor is stopped, switching the MVR evaporation system into a parallel working condition after the target vapor compressor is stabilized, and continuously performing surge prediction.
If the target vapor compressor is detected to be about to surge secondarily in the preset time range, the MVR evaporation system is switched to a cooperative working condition, shutdown maintenance is carried out on the target vapor compressor, and the MVR evaporation system is switched to a parallel working condition again under the condition that the maintenance of the target vapor compressor is completed and the residual completion time exceeds a preset threshold value. If the non-target vapor compressor is predicted to surge before the maintenance of the target vapor compressor is completed, opening an anti-surge valve of the non-target vapor compressor to eliminate the surge, and continuing to maintain the collaborative operation.
The control device of the MVR evaporation system provided in the present application is described below, and the control device of the MVR evaporation system described below and the control method of the MVR evaporation system described above may be referred to correspondingly.
Based on any of the above embodiments, fig. 3 is a schematic structural diagram of a control device of an MVR evaporation system provided in the present application, where the device is applied to a joint control unit of the MVR evaporation system, as shown in fig. 3, and the device includes:
an operation condition control module 201, configured to control an operation condition of the MVR evaporation system based on real-time operation state information of the first evaporation subsystem and the second evaporation subsystem;
the task execution module 202 is configured to control the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on an operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
According to the device provided by the embodiment of the application, the operation condition control module 201 controls the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem; the task execution module 202 controls the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on an operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task at the same time, normal operation of the evaporation task can be guaranteed under the condition that any one evaporation subsystem fails and is stopped, production resources are utilized to the maximum extent on the basis of guaranteeing the continuity of evaporation work, and production efficiency is improved.
Fig. 4 illustrates a physical schematic diagram of an electronic device, as shown in fig. 4, which may include: processor 301, communication interface (Communications Interface) 302, memory (memory) 303 and communication bus 304, wherein processor 301, communication interface 302, memory 303 accomplish the communication between each other through communication bus 304. The processor 301 may invoke logic instructions in the memory 303 to perform the method for controlling the MVR evaporation system provided by the methods described above, the method comprising: controlling the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem; controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
Further, the logic instructions in the memory 303 may be implemented in the form of 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 application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random AccessMemory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present application further provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, where the computer program, when executed by a processor, can perform a method for controlling an MVR evaporation system provided by the above methods, where the method includes: controlling the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem; controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
In yet another aspect, the present application further provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform a method of controlling an MVR evaporation system provided by the above methods, the method comprising: controlling the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem; controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. An MVR evaporation system, the system comprising:
the combined control unit, the first evaporation subsystem and the second evaporation subsystem;
the first evaporation subsystem comprises a first evaporator and a first vapor compressor, the second evaporation subsystem comprises a second evaporator and a second vapor compressor, the first evaporator is connected with the first vapor compressor through a first secondary vapor pipeline and a first heating vapor pipeline, and the second evaporator is connected with the second vapor compressor through a second secondary vapor pipeline and a second heating vapor pipeline;
the first evaporator is also connected with the second vapor compressor through a first emergency secondary vapor pipeline and a first emergency heating vapor pipeline, and the second evaporator is also connected with the first vapor compressor through a second emergency secondary vapor pipeline and a second emergency heating vapor pipeline;
The combined control unit is used for controlling the operation working condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem so as to control the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
2. The MVR evaporation system according to claim 1, wherein the controlling the operation condition of the MVR evaporation system based on the real-time operation state information of the first evaporation subsystem and the second evaporation subsystem specifically comprises:
determining surge prediction results of the first and second vapor compressors based on real-time operating state information of the first and second evaporation subsystems;
and controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor.
3. The MVR evaporation system according to claim 2, wherein the determining the surge prediction results of the first and second vapor compressors based on the real time operating state information of the first and second evaporation subsystems specifically comprises:
Inputting real-time working state information of the first evaporation subsystem and the second evaporation subsystem into a trained compressor surge prediction model, and determining surge prediction results of the first vapor compressor and the second vapor compressor based on output of the compressor surge prediction model;
the compressor surge prediction model is obtained by training based on working state information samples of a first evaporation subsystem and a second evaporation subsystem which are obtained in advance and corresponding surge time point labels, wherein the working state information samples are working state information of a preset period before surge occurs.
4. The MVR evaporation system of claim 3 wherein the real-time operating state information of the first and second evaporation subsystems comprises real-time operating parameters including an inlet pressure, an outlet pressure, a current, an inlet temperature, an outlet temperature, and an ambient temperature corresponding to the vapor compressor at a current time, and maintenance information comprising a time interval from a maintenance node at the current time; the surge prediction result includes a target vapor compressor at which surge is imminent and a surge time point of the target vapor compressor.
5. The MVR evaporation system of claim 4, wherein the operating conditions of the MVR evaporation system comprise parallel conditions and co-operating conditions; under the parallel working condition, the first evaporation subsystem independently executes the first evaporation task, and the second evaporation subsystem independently executes the second evaporation task; under the cooperative working condition, the first evaporation subsystem or the second evaporation subsystem synchronously executes a first evaporation task and a second evaporation task; correspondingly, the controlling the operation condition of the MVR evaporation system based on the surge prediction results of the first vapor compressor and the second vapor compressor specifically comprises:
if the surge prediction results of the first vapor compressor and the second vapor compressor do not comprise the target vapor compressor, controlling the MVR evaporation system to operate under a parallel working condition;
and if the surge prediction results of the first vapor compressor and the second vapor compressor comprise the target vapor compressor, controlling the MVR evaporation system to operate under a cooperative working condition.
6. The MVR evaporation system of claim 5, wherein in parallel operation, the first secondary vapor line, the first heating vapor line, the second secondary vapor line, and the second heating vapor line are on, and the first emergency secondary vapor line, the first emergency heating vapor line, the second emergency secondary vapor line, and the second emergency heating vapor line are off; under the cooperative working condition, if the target steam compressor is a first steam compressor, the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are connected, and the first secondary steam pipeline, the first heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are closed; if the target steam compressor is a second steam compressor, the first secondary steam pipeline, the first heating steam pipeline, the second emergency secondary steam pipeline and the second emergency heating steam pipeline are connected, and the first emergency secondary steam pipeline, the first emergency heating steam pipeline, the second secondary steam pipeline and the second heating steam pipeline are closed.
7. A method of controlling an MVR evaporation system, characterized in that the method is applied to the combined control unit of an MVR evaporation system according to claim 6, the method comprising:
controlling the operation condition of the MVR evaporation system based on the real-time working state information of the first evaporation subsystem and the second evaporation subsystem;
controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
8. A control device for an MVR evaporation system, characterized in that the device is applied to a joint control unit for an MVR evaporation system according to claim 6, the device comprising:
the operation condition control module is used for controlling the operation condition of the MVR evaporation system based on the real-time working condition information of the first evaporation subsystem and the second evaporation subsystem;
the task execution module is used for controlling the first evaporation subsystem and the second evaporation subsystem to complete a first evaporation task and a second evaporation task based on the operation working condition of the MVR evaporation system; the compression capacities of the first vapor compressor and the second vapor compressor can meet the evaporation requirements of the first evaporation task and the second evaporation task simultaneously.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for controlling the MVR evaporation system according to claim 7 when the program is executed by the processor.
10. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the steps of the method of controlling an MVR evaporation system according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202311486927.6A CN117258326A (en) | 2023-11-07 | 2023-11-07 | MVR evaporation system and control method and device thereof |
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| CN202311486927.6A CN117258326A (en) | 2023-11-07 | 2023-11-07 | MVR evaporation system and control method and device thereof |
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| CN117258326A true CN117258326A (en) | 2023-12-22 |
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