CN110794775B - Multi-boiler load intelligent control system and method - Google Patents
Multi-boiler load intelligent control system and method Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4183—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by data acquisition, e.g. workpiece identification
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a system and a method for intelligently controlling the load of a plurality of boilers, wherein the system comprises: the first temperature acquisition module is used for acquiring outdoor temperature; the first calculation module is used for calculating the current output load according to the current outdoor temperature; the second temperature acquisition module is used for acquiring the indoor temperature; the load correction module is used for correcting the current output load calculated by the first calculation module according to the current indoor temperature; the second calculation module is used for calculating the number of the started boilers and the heat supply load of each boiler according to the corrected current output load; and the boiler control module is used for controlling the plurality of boilers according to the number of the started boilers calculated by the second calculation module and the heat supply load of each boiler. The invention can accurately control the heat supply of the boiler, improve the comprehensive operation efficiency of the boiler and save energy.
Description
Technical Field
The invention relates to the technical field of boiler control, in particular to a multi-boiler load intelligent control system and a multi-boiler load intelligent control method.
Background
The control mode of the boiler of the existing small-sized regional boiler room is relatively simple, the load of a single boiler is set through setting the target water outlet temperature, the boiler of the single boiler is automatically adjusted to start and stop and supply heat load, and the number of the started boilers can be increased when the single boiler can not meet the total heat load requirement. The number of the boiler start-stop units, the setting of the outlet water temperature and the output quantity of the load depend on the experience of manual control, and the boiler start-stop units, the setting of the outlet water temperature and the output quantity of the load cannot be accurately controlled according to the heat required actually.
Meanwhile, the current control logic mainly controls the heat supply load through the target outlet water temperature, the mode cannot accurately control the actual output quantity of the boiler, when the secondary system has no energy-saving automatic control device and excessive heat supply occurs, the temperature of return water of primary water is reduced, and if the temperature of supplied water cannot be adjusted in time, the heat supply output load of the boiler is increased, and the energy consumption is increased; when the heat quantity required at the tail end is reduced, the temperature of primary water is increased, if the temperature of supplied water cannot be adjusted in time, the boiler is started and stopped frequently, and the operation efficiency is reduced.
A common climate compensator in the prior heat supply energy-saving technology mainly aims at an indirect heat supply system, combines the relation between outdoor temperature and secondary water supply temperature, and adjusts the secondary water supply temperature by controlling the flow of primary water entering a heat exchanger, thereby achieving the purpose of adjusting the secondary heat supply according to the outdoor temperature change. However, the operation state of the primary side boiler cannot be controlled by the technology, and if the temperature of primary water is set unreasonably, the boiler is started and stopped frequently, and the operation efficiency of the boiler is improved. In addition, when the technology is applied to a direct supply system, the flow of an outer pipe network can be influenced by adjusting the electric valve, and project hydraulic balance is not facilitated, so that the application of the technology in the direct supply system is limited.
Disclosure of Invention
The invention aims to solve the technical problems and provides an intelligent control system and method for load of multiple boilers, which can accurately control the heat supply of the boilers from a heat supply source, reduce the influence of manual adjustment experience on the operation efficiency of the boilers, improve the comprehensive operation efficiency of the boilers and achieve the aim of saving energy.
The technical scheme adopted by the invention is as follows:
an intelligent control system for multiple boiler loads, comprising: the first temperature acquisition module is used for acquiring outdoor temperature; the first calculation module is used for calculating the current output load according to the current outdoor temperature; the second temperature acquisition module is used for acquiring indoor temperature; the load correction module is used for correcting the current output load calculated by the first calculation module according to the current indoor temperature; the second calculation module is used for calculating the number of the started boilers and the heat supply load of each boiler according to the corrected current output load; and the boiler control module is used for controlling the plurality of boilers according to the number of the started boilers calculated by the second calculation module and the heat supply load of each boiler.
The intelligent control system for the load of the plurality of boilers further comprises: the third temperature acquisition module is used for acquiring the temperature of supply and return water; and the flow acquisition module is used for acquiring the circulating flow.
The first calculation module is used for calculating corresponding output load according to the water supply and return temperature and the circulation flow, and generating a load-outdoor temperature curve according to the outdoor temperature and the corresponding output load, and the first calculation module is specifically used for calculating the current output load according to the current outdoor temperature and the load-outdoor temperature curve.
The second calculation module is used for generating a thermal efficiency curve of the boiler according to the supply and return water temperature, the circulation flow and the output load of the boiler, and generating a load-number/efficiency curve according to the thermal efficiency curve of each boiler, the thermal power of each boiler and the electric power, and the second calculation module is specifically used for calculating the number of the starting boilers and the heat supply load of each boiler according to the corrected current output load and the load-number/efficiency curve.
And the load correction module is also used for correcting the current output load calculated by the first calculation module according to the input indoor correction temperature.
The boiler control module is also used for calculating the accumulated heat supply load of the boilers.
The first calculation module is further used for calculating corresponding output loads according to the outdoor temperature forecast values, and the boiler control module is further used for predicting accumulated heat supply loads of the boilers.
An intelligent control method for loads of multiple boilers comprises the following steps: collecting outdoor temperature; calculating the current output load according to the current outdoor temperature; collecting indoor temperature; correcting the calculated current output load according to the current indoor temperature; calculating the starting number of the boilers and the heat supply load of each boiler according to the corrected current output load; and controlling the plurality of boilers according to the calculated starting number of the boilers and the heat supply load of each boiler.
The intelligent control method for the loads of the plurality of boilers further comprises the following steps: collecting the temperature and the circulation flow of supply and return water; calculating corresponding output load according to the water supply and return temperature and the circulation flow, generating a load-outdoor temperature curve according to the outdoor temperature and the corresponding output load, and calculating the current output load according to the current outdoor temperature, specifically comprising: and calculating the current output load according to the current outdoor temperature and the load-outdoor temperature curve.
The intelligent control method for the loads of the plurality of boilers further comprises the following steps: generating a thermal efficiency curve of the boiler according to the temperature of the supply water and the return water, the circulation flow and the output load of the boiler; generating a load-number-of-boilers/efficiency curve according to the thermal efficiency curve of each boiler, the thermal power of each boiler and the electric power, and calculating the number of the boilers started and the heat supply load of each boiler according to the corrected current output load, which specifically comprises the following steps: and calculating the starting number of the boilers and the heat supply load of each boiler according to the corrected current output load and the load-number/efficiency curve.
The invention has the beneficial effects that:
according to the intelligent control system and method for the load of the multiple boilers, disclosed by the embodiment of the invention, the current output load is corrected by respectively acquiring the outdoor temperature and the indoor temperature and calculating the current output load, the starting number of the boilers and the heat supply load of each boiler are calculated according to the corrected current output load, and then the multiple boilers are controlled according to the starting number of the boilers and the heat supply load of each boiler, so that the heat supply quantity of the boilers can be accurately controlled from a heat supply source, the influence of manual adjustment experience on the operation efficiency of the boilers is reduced, the comprehensive operation efficiency of the boilers is improved, and the purpose of saving energy is achieved.
Drawings
FIG. 1 is a block diagram of a multiple boiler load intelligent control system according to an embodiment of the present invention;
FIG. 2 is a block diagram of a multiple boiler load intelligent control system according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a load versus outdoor temperature curve for one embodiment of the present invention;
FIG. 4 is a schematic diagram of a thermal efficiency curve for one embodiment of the present invention;
FIG. 5 is a schematic diagram of a load-number/efficiency curve according to an embodiment of the present invention;
FIG. 6 is a flowchart of a method for intelligently controlling loads of multiple boilers according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1, the system for intelligently controlling loads of multiple boilers in the embodiment of the present invention includes a first temperature collection module 10, a first calculation module 20, a second temperature collection module 30, a load correction module 40, a second calculation module 50, and a boiler control module 60. The first temperature acquisition module 10 is used for acquiring outdoor temperature; the first calculating module 20 is used for calculating the current output load according to the current outdoor temperature; the second temperature acquisition module 30 is used for acquiring indoor temperature; the load correction module 40 is configured to correct the current output load calculated by the first calculation module 20 according to the current indoor temperature; the second calculating module 50 is used for calculating the starting number of the boilers and the heat supply load of each boiler according to the corrected current output load; the boiler control module 60 is configured to control the plurality of boilers according to the number of the boilers started and the heating load of each boiler, which are calculated by the second calculation module 50.
Further, as shown in fig. 2, the multiple boiler load intelligent control system according to the embodiment of the present invention may further include a third temperature collection module 70 and a flow collection module 80. The third temperature acquisition module 70 is used for acquiring the temperature of the supply water and the return water, and the flow acquisition module 80 is used for acquiring the circulating flow.
In an embodiment of the present invention, the first calculating module 20 may calculate a corresponding output load according to the supply and return water temperature and the circulation flow, and generate a load-outdoor temperature curve according to the outdoor temperature and the corresponding output load. Specifically, the outdoor temperature collected over a period of time and the corresponding output load may be fitted on a two-dimensional coordinate to obtain a load-outdoor temperature curve. The load-outdoor temperature curve for one embodiment of the present invention is shown in fig. 3.
The first calculating module 20 may specifically calculate the current output load according to the current outdoor temperature and the load-outdoor temperature curve obtained by fitting, that is, the current output load is obtained by using the current outdoor temperature as a variable and searching for another corresponding variable on the load-outdoor temperature curve.
In one embodiment of the present invention, the modification equation for the load modification module 40 to modify the current output load is:
wherein Q is the corrected output load, Q' is the output load calculated by the first calculation module 20, tn is the indoor design temperature, tns is the indoor temperature collected by the second temperature collection module 30, and tw is the outdoor calculation temperature.
In an embodiment of the present invention, the load correction module 40 may further correct the current output load calculated by the first calculation module 20 according to the input indoor corrected temperature, that is, tn may be the indoor corrected temperature manually input.
In one embodiment of the present invention, the second calculation module 50 can generate a thermal efficiency curve of one boiler according to the supply and return water temperature, the circulation flow rate and the output load of the boiler, and generate a load-number/efficiency curve according to the thermal efficiency curve of each boiler, the thermal power of each boiler and the electric power. Specifically, the relationship between the supply and return water temperature, the circulation flow rate and the output load of a boiler and the thermal efficiency of the boiler is as follows:
wherein eta is the thermal efficiency of the boiler, G is the circulation flow, delta t is the difference between the supply water temperature and the return water temperature, c is a constant, and Qi is the actual output load of one boiler. The collected and calculated multiple thermal efficiencies and the actual output load of the boiler or the boiler load ratio can be fitted on a two-dimensional coordinate to obtain a thermal efficiency curve. In one embodiment of the present invention, the thermal efficiency curve for 1 boiler rated at 0.7MW is shown in FIG. 4.
For the load-number/efficiency curve, assume that a boiler room has 3 rated loads Q0The boiler of MW, combustor fan power is QfkW, and the thermal efficiency of every boiler is:
η＝aQ3+bQ2+cQ+d
when 1 station is operated, eta 1 is aQ3+bQ2+cQ+d；
In the case of 2 runs, the
In the case of 3 runs, the
Using the corrected current output load Q and the rated load Q of a single boiler0Judging the ratio alpha, when alpha is less than or equal to 1, if Q (eta 2-eta 1) is less than or equal to Qf, operating 1 boiler, wherein the operating load of the boiler is Q; if Q (eta 2-eta 1) > Qf, 2 boilers are operated, and the operation load of each boiler is Q/2. When alpha is more than 1 and less than or equal to 3, if Q (eta 3-eta 2) is less than or equal to Qf and alpha is less than or equal to 2, operating 2 boilers, wherein the operating load of each boiler is Q/2; otherwise, 3 boilers are operated, and the operation load of each boiler is Q/3.
The load-number/efficiency curve shown in fig. 5 can be obtained by plotting the above operation loads and their corresponding numbers and efficiencies into one curve.
The second calculating module 50 may specifically calculate the number of the boilers started and the heating load of each boiler according to the corrected current output load and the load-number/efficiency curve. That is, the corrected current output load may be used as a variable, and the other two corresponding variables, i.e., the thermal efficiency and the number of start-stop units, are searched on the load-number/efficiency curve shown in fig. 5, and then the corresponding boiler load ratio is obtained according to the thermal efficiency until the corresponding heat supply load is finally obtained.
In one embodiment of the present invention, the boiler control module 60 may be in data transfer connection with the boiler control cabinet or may be disposed within the boiler control cabinet. The boiler control module 60 may generate a boiler start instruction and a burner fan start and rotation speed adjustment instruction according to the calculated number of start-up units and the heat supply load of each boiler, and send the boiler start instruction and the burner fan start and rotation speed adjustment instruction to the boiler control cabinet, thereby controlling the start-up of the corresponding number of boilers, controlling the rotation speed of the burner fan of each boiler, and ensuring that the total heat supply load matches the corrected output load.
Further, the boiler control module 60 according to the embodiment of the present invention may further calculate an accumulated heat load of the plurality of boilers, and specifically, the control module 60 may calculate an accumulated heat load of each boiler in a period of time, and sum the accumulated heat loads of the plurality of boilers in a period of time to obtain the accumulated heat loads of the plurality of boilers, thereby implementing load monitoring.
Further, the first calculation module 20 may calculate a corresponding output load according to the outdoor temperature prediction value, and the boiler control module 60 may predict an accumulated heating load of the plurality of boilers. Specifically, the first calculation module 20 may obtain an outdoor temperature predicted value for a period of time, for example, 24 hours, through manual input, or may automatically obtain an outdoor temperature predicted value for a period of time through communication with an air temperature prediction device, then calculate an output load predicted value according to the outdoor temperature predicted value, perform correction through the load correction module 40, calculate the number of boiler starting stations and the heat supply load of each boiler at a time point corresponding to a certain outdoor temperature predicted value through the second calculation module 50, and calculate the cumulative heat supply load of a plurality of boilers in a period of time through the boiler control module 60, thereby implementing load prediction.
According to the intelligent control system for the load of the multiple boilers, disclosed by the embodiment of the invention, the outdoor temperature and the indoor temperature are respectively acquired through the first temperature acquisition module and the second temperature acquisition module, the current output load is calculated through the first calculation module, the current output load is corrected through the load correction module, the number of the starting boilers and the heat supply load of each boiler are calculated through the second calculation module according to the corrected current output load, and then the multiple boilers are controlled through the boiler control module according to the number of the starting boilers and the heat supply load of each boiler, so that the heat supply amount of the boilers can be accurately controlled from a heat supply source, the influence of manual adjustment experience on the operation efficiency of the boilers is reduced, the comprehensive operation efficiency of the boilers is improved, and the purpose of saving energy is achieved.
It should be understood that the load-outdoor temperature curve, the thermal efficiency curve, and the load-number/efficiency curve are previously fitted according to the corresponding parameters and are called when the number of boilers to be started and the heating load of each boiler are calculated. As the boiler is used, the thermal efficiency of the boiler may vary, and the correspondence between the parameters may also vary. Therefore, in an embodiment of the present invention, the load-outdoor temperature curve, the thermal efficiency curve, and the load-number/efficiency curve described above may be modified or updated according to recent operating data of a plurality of boilers. By continuously correcting or updating the curves, the calculation accuracy can be improved, and the control precision of the boiler is further improved.
Corresponding to the system for intelligently controlling the loads of the multiple boilers in the embodiment, the invention further provides a method for intelligently controlling the loads of the multiple boilers.
As shown in fig. 6, the method for intelligently controlling loads of multiple boilers in the embodiment of the present invention includes the following steps:
and S1, collecting the outdoor temperature.
In one embodiment of the present invention, the outdoor temperature may be collected by a temperature sensor disposed outside the boiler room.
And S2, calculating the current output load according to the current outdoor temperature.
And S3, collecting the indoor temperature.
In one embodiment of the present invention, the indoor temperature may be collected by a temperature sensor provided inside the boiler room.
S4, the calculated current output load is corrected according to the current indoor temperature.
And S5, calculating the number of the starting boilers and the heating load of each boiler according to the corrected current output load.
And S6, controlling the plurality of boilers according to the calculated starting number of the boilers and the heating load of each boiler.
Further, the method for intelligently controlling the load of the plurality of boilers in the embodiment of the present invention may further include: collecting the temperature and the circulation flow of supply and return water; and calculating corresponding output load according to the temperature of the supplied and returned water and the circulating flow, and generating a load-outdoor temperature curve according to the outdoor temperature and the corresponding output load. Specifically, the outdoor temperature collected over a period of time and the corresponding output load may be fitted on a two-dimensional coordinate to obtain a load-outdoor temperature curve. The load-outdoor temperature curve for one embodiment of the present invention is shown in fig. 3.
Step S2 specifically includes: and calculating the current output load according to the current outdoor temperature and the load-outdoor temperature curve, namely using the current outdoor temperature as a variable, and searching for another corresponding variable on the load-outdoor temperature curve, namely the current output load.
In one embodiment of the present invention, the correction equation for correcting the current output load is:
wherein Q is the corrected output load, Q' is the output load calculated by the first calculation module 20, tn is the indoor design temperature, tns is the indoor temperature collected by the second temperature collection module 30, and tw is the outdoor calculation temperature.
In an embodiment of the present invention, the calculated current output load may be further corrected according to the input indoor corrected temperature, that is, tn may be the indoor corrected temperature which is manually input.
Further, the method for intelligently controlling the load of the plurality of boilers in the embodiment of the present invention may further include: generating a thermal efficiency curve of the boiler according to the temperature of supply and return water, the circulation flow and the output load of the boiler; and generating a load-unit number/efficiency curve according to the thermal efficiency curve of each boiler, the thermal power and the electric power of each boiler. Specifically, the relationship between the supply and return water temperature, the circulation flow rate and the output load of a boiler and the thermal efficiency of the boiler is as follows:
wherein eta is the thermal efficiency of the boiler, G is the circulation flow, delta t is the difference between the supply water temperature and the return water temperature, c is a constant, and Qi is the actual output load of one boiler. The collected and calculated multiple thermal efficiencies and the actual output load of the boiler or the boiler load ratio can be fitted on a two-dimensional coordinate to obtain a thermal efficiency curve. In one embodiment of the present invention, the thermal efficiency curve for 1 boiler rated at 0.7MW is shown in FIG. 4.
For the load-number/efficiency curve, assume that a boiler room has 3 rated loads Q0The boiler of MW, combustor fan power is QfkW, and the thermal efficiency of every boiler is:
η＝aQ3+bQ2+cQ+d
when 1 station is operated, eta 1 is aQ3+bQ2+cQ+d；
In the case of 2 runs, the
In the case of 3 runs, the
Using the corrected current output load Q and the rated load Q of a single boiler0Judging the ratio alpha, when alpha is less than or equal to 1, if Q (eta 2-eta 1) is less than or equal to Qf, operating 1 boiler, wherein the operating load of the boiler is Q; if Q (eta 2-eta 1) > Qf, 2 boilers are operated, and the operation load of each boiler is Q/2. When alpha is more than 1 and less than or equal to 3, if Q (eta 3-eta 2) is less than or equal to Qf and alpha is less than or equal to 2, operating 2 boilers, wherein the operating load of each boiler is Q/2; otherwise, 3 boilers are operated, and the operation load of each boiler is Q/3.
The load-number/efficiency curve shown in fig. 5 can be obtained by plotting the above operation loads and their corresponding numbers and efficiencies into one curve.
Step S5 specifically includes: and calculating the starting number of the boilers and the heat supply load of each boiler according to the corrected current output load and the load-number/efficiency curve. That is, the corrected current output load may be used as a variable, and the other two corresponding variables, i.e., the thermal efficiency and the number of start-stop units, are searched on the load-number/efficiency curve shown in fig. 5, and then the corresponding boiler load ratio is obtained according to the thermal efficiency until the corresponding heat supply load is finally obtained.
In an embodiment of the present invention, the boiler start instruction and the burner fan start and rotation speed adjustment instruction may be generated according to the calculated number of the start-up units and the heat supply load of each boiler, and sent to the boiler control cabinet, so as to control the start-up of the corresponding number of boilers and control the rotation speed of the burner fan of each boiler, thereby ensuring that the total heat supply load matches the corrected output load.
Further, the cumulative heat supply load of a plurality of boilers can be calculated, specifically, the cumulative heat supply load of each boiler in a period of time can be calculated, the cumulative heat supply loads of the plurality of boilers in the period of time are summed, the cumulative heat supply loads of the plurality of boilers are obtained, and therefore load monitoring is achieved.
Furthermore, the corresponding output load can be calculated according to the outdoor temperature forecast value, and the accumulated heat supply load of a plurality of boilers can be forecasted. Specifically, the load prediction can be realized by acquiring an outdoor temperature prediction value for a period of time, for example, 24 hours, through manual input, or automatically acquiring the outdoor temperature prediction value for a period of time through communication with an air temperature prediction device, then calculating an output load prediction value according to the outdoor temperature prediction value, correcting through a load correction module, calculating the number of starting boilers and the heat supply load of each boiler at a time point corresponding to a certain outdoor temperature prediction value, and finally calculating the accumulated heat supply load of a plurality of boilers in a period of time.
According to the intelligent control method for the load of the multiple boilers, disclosed by the embodiment of the invention, the current output load is corrected by respectively acquiring the outdoor temperature and the indoor temperature and calculating the current output load, the starting number of the boilers and the heat supply load of each boiler are calculated according to the corrected current output load, and then the multiple boilers are controlled according to the starting number of the boilers and the heat supply load of each boiler, so that the heat supply quantity of the boilers can be accurately controlled from a heat supply source, the influence of manual adjustment experience on the operation efficiency of the boilers is reduced, the comprehensive operation efficiency of the boilers is improved, and the purpose of saving energy is achieved.
It should be understood that the load-outdoor temperature curve, the thermal efficiency curve, and the load-number/efficiency curve are previously fitted according to the corresponding parameters and are called when the number of boilers to be started and the heating load of each boiler are calculated. As the boiler is used, the thermal efficiency of the boiler may vary, and the correspondence between the parameters may also vary. Therefore, in an embodiment of the present invention, the load-outdoor temperature curve, the thermal efficiency curve, and the load-number/efficiency curve described above may be modified or updated according to recent operating data of a plurality of boilers. By continuously correcting or updating the curves, the calculation accuracy can be improved, and the control precision of the boiler is further improved.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The meaning of "plurality" is two or more unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a many boiler load intelligence control system which characterized in that includes:
the first temperature acquisition module is used for acquiring outdoor temperature;
the first calculation module is used for calculating the current output load according to the current outdoor temperature;
the second temperature acquisition module is used for acquiring indoor temperature;
the load correction module is used for correcting the current output load calculated by the first calculation module according to the current indoor temperature;
the second calculation module is used for calculating the number of the started boilers and the heat supply load of each boiler according to the corrected current output load;
the boiler control module is used for controlling the plurality of boilers according to the number of the started boilers calculated by the second calculation module and the heat supply load of each boiler;
the third temperature acquisition module is used for acquiring the temperature of supply and return water;
a flow collection module for collecting the circulation flow,
the second calculation module is used for generating a thermal efficiency curve of the boiler according to the supply and return water temperature, the circulation flow and the output load of the boiler, and generating a load-number/efficiency curve according to the thermal efficiency curve of each boiler, the thermal power of each boiler and the electric power, and the second calculation module is specifically used for calculating the number of the starting boilers and the heat supply load of each boiler according to the corrected current output load and the load-number/efficiency curve.
2. The system of claim 1, wherein the first computing module is configured to compute a corresponding output load according to the supply and return water temperature and the circulation flow rate, and generate a load-outdoor temperature curve according to the outdoor temperature and the corresponding output load, and the first computing module is specifically configured to compute a current output load according to a current outdoor temperature and the load-outdoor temperature curve.
3. The system of claim 1, wherein the load modification module further modifies the current output load calculated by the first calculation module based on the input room modified temperature.
4. The intelligent control system for multiple boiler loads according to claim 1, wherein the boiler control module is further configured to calculate an accumulated heating load for the multiple boilers.
5. The intelligent control system for multiple boiler loads according to claim 1, wherein the first calculation module is further configured to calculate the corresponding output load according to an outdoor temperature forecast value, and the boiler control module is further configured to predict an accumulated heating load of the multiple boilers.
6. An intelligent control method for loads of multiple boilers is characterized by comprising the following steps:
collecting outdoor temperature;
calculating the current output load according to the current outdoor temperature;
collecting indoor temperature;
correcting the calculated current output load according to the current indoor temperature;
calculating the starting number of the boilers and the heat supply load of each boiler according to the corrected current output load;
controlling a plurality of boilers according to the calculated starting number of the boilers and the heat supply load of each boiler,
the intelligent control method for the loads of the plurality of boilers further comprises the following steps:
collecting the temperature and the circulation flow of supply and return water;
generating a thermal efficiency curve of the boiler according to the temperature of the supply water and the return water, the circulation flow and the output load of the boiler;
generating a load-number/efficiency curve according to the thermal efficiency curve of each boiler, the thermal power and the electric power of each boiler,
the calculating the number of the started boilers and the heat supply load of each boiler according to the corrected current output load specifically comprises:
and calculating the starting number of the boilers and the heat supply load of each boiler according to the corrected current output load and the load-number/efficiency curve.
7. The intelligent control method for multiple boiler loads according to claim 6, further comprising:
calculating corresponding output load according to the water supply and return temperature and the circulation flow, generating a load-outdoor temperature curve according to the outdoor temperature and the corresponding output load,
the calculating the current output load according to the current outdoor temperature specifically includes:
and calculating the current output load according to the current outdoor temperature and the load-outdoor temperature curve.
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| CN112197262B (en) * | 2020-10-24 | 2023-06-27 | 四川泸天化创新研究院有限公司 | Intelligent control method for circulating fluidized bed coal-fired boiler |
| CN113531647B (en) * | 2021-07-29 | 2023-04-21 | 山东普赛通信科技股份有限公司 | Method and system for regulating and controlling distributed heating system of natural gas boiler |
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