CN113218109B - Intelligent regulation and control device and method for deep waste heat recovery - Google Patents
Intelligent regulation and control device and method for deep waste heat recovery Download PDFInfo
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- CN113218109B CN113218109B CN202110405122.9A CN202110405122A CN113218109B CN 113218109 B CN113218109 B CN 113218109B CN 202110405122 A CN202110405122 A CN 202110405122A CN 113218109 B CN113218109 B CN 113218109B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The invention discloses an intelligent regulation and control device and method for deep waste heat recovery, wherein the device comprises a data acquisition module, a data processing module, a data analysis module, an information benefit evaluation module and a data synchronous distribution module, wherein the data acquisition module is used for acquiring operation data of each device in a waste heat recovery system; the data processing module is used for calculating boiler output load, heat recovery heat and output heat of the heat pump unit according to the operation data of each device; the data analysis module is used for carrying out mapping analysis on the data recorded in a given time period to form a boiler load-return water temperature curve and a COP-return water temperature curve; the information benefit evaluation module is used for giving heat pump unit control parameters according to the optimal heat pump energy efficiency interval, obtaining the effective yield of the system by combining the current boiler output load value and a preset evaluation mechanism, and giving control values of the evaporation temperature and the condensation temperature through economic accounting comparison; the data synchronous distribution module is used for outputting given control values of evaporation temperature and condensation temperature.
Description
Technical Field
The invention relates to the technical field of waste heat recovery, in particular to an intelligent regulation and control device and method for deep waste heat recovery.
Background
The temperature of the discharged smoke after the combustion of the natural gas is about 100 to 200 ℃, the temperature is still about 60 ℃ after the sensible heat recovery, and the low-temperature discharged smoke is one of the key influence factors for further improving the energy utilization efficiency. The smoke exhaust temperature of the boiler can be effectively reduced by additionally arranging a set of smoke waste heat recovery system in the smoke exhaust process, the generation of white fog is reduced, and the heat of the white fog is utilized, so that the boiler efficiency is obviously improved.
In recent years, the application of deep flue gas waste heat recovery based on the heat pump technology in engineering is increasing. Due to the fact that an ideal low-temperature cold source is obtained, the recycling of the heat energy of the low-temperature flue gas below 60 ℃ becomes practical. However, due to the dynamic matching between the heat pump system and the heat extraction equipment, the debugging of the flue gas waste heat recovery system based on the heat pump faces a new problem. The operation load of the compression heat pump directly influences the heat exchange amount of the heat taking equipment. As the load on the heat pump increases, the amount of heat recovered and the amount of electricity consumed increase by a non-equivalent amount. The input power is generally controlled by controlling the outlet water temperature of the evaporator or the condenser, but the input power is not only controlled by the above parameters, the influence on the input power when the inlet water temperature is increased or decreased is also very large and has nonlinear influence even influenced by the load of a boiler, the temperature of inlet and outlet smoke and the ambient temperature. Therefore, the system can not be accurately controlled only by manually adjusting the outlet water temperature and the running flow of the heat pump unit, and the recovery efficiency of the system is influenced.
Disclosure of Invention
In view of the above, the invention provides an intelligent deep waste heat recovery control device and method, which can adjust operation control parameters of a heat pump in time under different boiler loads, so that the real-time operation efficiency of a system reaches a maximum value, thereby improving the overall heat recovery efficiency of the system and achieving the purpose of further saving energy.
One aspect of the present invention provides an intelligent deep waste heat recovery control device, comprising: the data acquisition module is used for acquiring the operation data of each device in the waste heat recovery system; the data processing module is used for receiving the operation data of each device acquired by the data acquisition module and calculating the output load of the boiler, the heat recovery heat and the output heat of the heat pump unit according to the operation data of each device; the data analysis module is used for recording the operation data of each device acquired by the data acquisition module in multiple time periods and the boiler output load, the heat recovery heat and the output heat data of the heat pump unit calculated by the data processing module, and performing mapping analysis on the data recorded in the given time period to form a boiler load-return water temperature curve and a COP-return water temperature curve; the system comprises an information benefit evaluation module, a heat pump set control module, an evaporation temperature control module, a condensation temperature control module and a heat pump set control module, wherein the information benefit evaluation module is used for setting heat pump set control parameters according to a boiler load-return water temperature curve and a COP-return water temperature curve and a heat pump energy efficiency optimal interval, obtaining the effective profitability of the system by combining a current boiler output load value and a preset evaluation mechanism, and setting appropriate evaporation temperature and condensation temperature control values through economic accounting comparison; and the data synchronous distribution module is used for outputting given control values of the evaporation temperature and the condensation temperature.
Further, the operation data of each device includes, but is not limited to, boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow and heat pump unit power consumption.
Further, the method for calculating the output load of the boiler by the data processing module comprises the following steps: and calculating the output load of the boiler according to the acquired boiler circulation flow and the boiler supply and return water temperature.
Further, the method for calculating the heat recovery heat and the output heat of the heat pump unit by the data processing module comprises the following steps: and calculating the heat recovery heat of the heat pump unit and the output heat of the heat pump unit according to the acquired water supply temperature of the evaporator, the water return temperature of the evaporator, the water supply temperature of the condenser, the water return temperature of the condenser, the circulation flow of the evaporator and the circulation flow of the condenser in the heat pump unit.
Further, the method for forming the boiler load-return water temperature curve by the data analysis module comprises the following steps: acquiring boiler return water temperature data acquired within a period of time and corresponding boiler output load data obtained through calculation; and fitting the boiler return water temperature acquired within a period of time and the corresponding boiler output load obtained by calculation on a two-dimensional coordinate to obtain a boiler load-return water temperature curve.
Further, the method for forming the COP-return water temperature curve by the data analysis module comprises the following steps: acquiring the water return temperature of the condenser and the power consumption data of the heat pump unit within a period of time, and adjusting the water return temperature control value of the evaporator according to different water return temperatures of the condenser within a period of time; calculating a heat pump unit COP value corresponding to an evaporator return water temperature control value according to the acquired heat pump unit power consumption and the calculated heat pump unit output heat; and fitting the COP value of the heat pump unit corresponding to the condenser backwater temperature and the evaporator backwater temperature control value on a two-dimensional coordinate to obtain a COP-backwater temperature curve.
Further, the method for setting the appropriate control values of the evaporation temperature and the condensation temperature by the information benefit evaluation module comprises the following steps: based on a boiler load-return water temperature curve and a COP-return water temperature curve, setting heat pump unit control parameters including an evaporation temperature setting value and a condensation temperature setting value according to a region with a large heat pump energy efficiency ratio; combining the current boiler output load value and a preset evaluation mechanism to obtain the effective yield of the system; the method comprises the steps of comparing the recovered heat under different working conditions, carrying out economic accounting comparison on a waste heat recovery system by combining the unit price of the current fuel gas and the power consumption energy and the reduction value of power consumption, and giving appropriate control values of evaporation temperature and condensation temperature.
The invention provides a depth waste heat recovery intelligent regulation and control method, which comprises the following steps: collecting operation data of each device in the waste heat recovery system; calculating the output load of the boiler, the heat recovery heat and the output heat of the heat pump unit according to the collected operation data of each device; recording operation data of each device collected in multiple time periods and calculated boiler output load, heat recovery heat of a heat pump unit and output heat data, and performing mapping analysis on the data recorded in a given time period to form a boiler load-backwater temperature curve and a COP-backwater temperature curve; based on a boiler load-return water temperature curve and a COP-return water temperature curve, according to the optimal heat pump energy efficiency interval, giving heat pump unit control parameters, combining the current boiler output load value and a preset evaluation mechanism to obtain the effective yield of the system, and giving appropriate evaporation temperature and condensation temperature control values through economic accounting comparison; and outputting the given control values of the evaporation temperature and the condensation temperature.
Further, the operation data of each device includes, but is not limited to, boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow and heat pump unit power consumption.
Further, the method for calculating the output load of the boiler comprises the following steps: and calculating the output load of the boiler according to the acquired boiler circulation flow and the boiler supply and return water temperature.
Further, the heat recovery heat and the output heat of the heat pump unit are calculated by the following steps: and calculating the heat recovery heat of the heat pump unit and the output heat of the heat pump unit according to the acquired water supply temperature of the evaporator, the water return temperature of the evaporator, the water supply temperature of the condenser, the water return temperature of the condenser, the circulation flow of the evaporator and the circulation flow of the condenser in the heat pump unit.
Further, the forming method of the boiler load-return water temperature curve comprises the following steps: acquiring boiler return water temperature data acquired within a period of time and corresponding boiler output load data obtained through calculation; fitting the boiler return water temperature collected within a period of time and the corresponding boiler output load obtained by calculation on a two-dimensional coordinate to obtain a boiler load-return water temperature curve,
further, the forming method of the COP-backwater temperature curve comprises the following steps: acquiring the water return temperature of the condenser and the power consumption data of the heat pump unit within a period of time, and adjusting the water return temperature control value of the evaporator according to different water return temperatures of the condenser within a period of time; calculating a heat pump unit COP value corresponding to an evaporator return water temperature control value according to the acquired heat pump unit power consumption and the calculated heat pump unit output heat; and fitting the COP value of the heat pump unit corresponding to the condenser backwater temperature and the evaporator backwater temperature control value on a two-dimensional coordinate to obtain a COP-backwater temperature curve.
Further, the evaporation temperature and condensation temperature control values are given by the following methods: based on a boiler load-return water temperature curve and a COP-return water temperature curve, setting heat pump unit control parameters including an evaporation temperature setting value and a condensation temperature setting value according to a region with a large heat pump energy efficiency ratio; combining the current boiler output load value and a preset evaluation mechanism to obtain the effective yield of the system; the method comprises the steps of comparing the recovered heat under different working conditions, carrying out economic accounting comparison on a waste heat recovery system by combining the unit price of the current fuel gas and the power consumption energy and the reduction value of power consumption, and giving appropriate control values of evaporation temperature and condensation temperature.
Drawings
For purposes of illustration and not limitation, the present invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:
fig. 1 is a block diagram of a deep waste heat recovery intelligent control device according to an embodiment;
FIG. 2 is a schematic diagram of a waste heat recovery system;
FIG. 3 is a graph of return water temperature versus boiler load;
FIG. 4 is a COP-backwater temperature curve;
fig. 5 is a flowchart of the intelligent deep waste heat recovery control method according to the second embodiment.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. 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.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example one
Fig. 1 is a block diagram of a deep waste heat recovery intelligent control device according to an embodiment of the present invention.
In this embodiment, the deep waste heat recovery intelligent control device 10 may be applied to a computer device, and the deep waste heat recovery intelligent control device 10 may include a plurality of functional modules composed of program code segments. The program codes of the program segments in the intelligent deep waste heat recovery regulation and control device 10 may be stored in a memory of a computer device and executed by at least one processor of the computer device to implement the intelligent deep waste heat recovery regulation and control function.
In this embodiment, the deep waste heat recovery intelligent control device 10 may be divided into a plurality of functional modules according to the functions performed by the deep waste heat recovery intelligent control device. The functional module may include: the system comprises a data acquisition module 101, a data processing module 102, a data analysis module 103, an information benefit evaluation module 104 and a data synchronous distribution module 105. The module referred to herein is a series of computer program segments capable of being executed by at least one processor and capable of performing a fixed function and is stored in memory. In the present embodiment, the functions of the modules will be described in detail in the following embodiments.
And the data acquisition module 101 is used for acquiring operation data of each device in the waste heat recovery system.
And the data processing module 102 is configured to receive the operation data of each device acquired by the data acquisition module, and calculate a boiler output load, a heat recovery heat quantity and an output heat quantity of the heat pump unit according to the operation data of each device.
The data analysis module 103 is configured to record operation data of each device acquired by the data acquisition module 101 in multiple time periods and data of the boiler output load, the heat recovery heat of the heat pump unit, and the output heat calculated by the data processing module, and perform mapping analysis on the data recorded in a certain time period to form a boiler load-return water temperature curve and a COP-return water temperature curve.
And the information benefit evaluation module 104 is used for setting a heat pump unit control parameter according to a larger heat pump energy efficiency interval based on a boiler load-return water temperature curve and a COP-return water temperature curve, obtaining the effective profitability of the system by combining the current boiler output load value and a preset evaluation mechanism, and setting a better evaporation temperature and condensation temperature control value by economic calculation and comparison.
And the data synchronous distribution module 105 is used for outputting control values of the better evaporation temperature and the better condensation temperature.
In one embodiment, the data acquisition module 101 is used to acquire the operation data of each device in the waste heat recovery system.
The waste heat recovery system is shown in fig. 2. This waste heat recovery system includes boiler and heat pump set, and heat pump set includes evaporimeter and condenser, is connected with heat meter, thermometer and pressure gauge respectively on the pipeline that boiler, evaporimeter and condenser are connected, and degree of depth waste heat recovery intelligent control device 10 is connected respectively to heat meter, thermometer and pressure gauge. Gather heat meter, thermometer and pressure gauge measuring value through data acquisition module 101 among the intelligent regulation and control device of degree of depth waste heat recovery 10 to obtain the operational data of boiler, evaporimeter and condenser.
The operational data of the boiler, the evaporator and the condenser include, but are not limited to, boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow and heat pump unit power consumption.
Further, the data acquisition module 101 is also used to obtain standard values, which include, but are not limited to, unit prices of gas and electricity.
In an embodiment, the data processing module 102 receives data, such as boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow, and heat pump unit power consumption, acquired by the data acquisition module 101.
After the data processing module 102 finishes receiving the data, the output load of the boiler is calculated according to the collected boiler circulation flow and the collected boiler water supply and return temperature, and further, the heat recovery heat of the heat pump unit and the output heat of the heat pump unit are calculated according to the collected water supply temperature of the evaporator, the water return temperature of the evaporator, the water supply temperature of the condenser, the water return temperature of the condenser, the circulation flow of the evaporator and the circulation flow of the condenser in the heat pump unit.
Further, the data processing module 102 is further configured to compare the collected upper limit values respectively set for the boiler water supply and return temperature, the boiler water supply and return pressure, the evaporator water supply temperature, the evaporator water return temperature, the condenser water supply temperature, and the condenser water return temperature, and give an alarm prompt when the temperatures and pressures of the boiler, the evaporator, and the condenser in the system exceed the set upper limit values.
In an embodiment, data such as boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow, and heat pump unit power consumption collected by the data collection module 101 in a plurality of time periods are recorded by the data analysis module 103, and further, the boiler output load, the heat recovery heat of the heat pump unit, and the output heat of the heat pump unit calculated by the data processing module 102 are recorded.
The data analysis module 103 performs mapping analysis on the recorded data such as the boiler supply and return water temperature, the boiler supply and return water pressure, the boiler circulation flow, the evaporator supply water temperature, the evaporator return water temperature, the condenser supply water temperature, the condenser return water temperature, the evaporator circulation flow, the condenser circulation flow, the heat pump unit power consumption and the like, and the data such as the boiler output load, the heat recovery heat of the heat pump unit and the output heat of the heat pump unit to form a boiler load-return water temperature curve and a COP-return water temperature curve.
The forming method of the boiler load-return water temperature curve comprises the following steps:
acquiring boiler return water temperature data acquired within a period of time and corresponding boiler output load data obtained through calculation;
and fitting the boiler return water temperature acquired within a period of time and the corresponding boiler output load obtained by calculation on a two-dimensional coordinate to obtain a boiler load-return water temperature curve.
The COP-return water temperature curve includes COP curves corresponding to different evaporation temperatures and condensation temperatures, as shown in fig. 3. The forming method of the COP-backwater temperature curve comprises the following steps:
acquiring the water return temperature of the condenser and the power consumption data of the heat pump unit within a period of time, and adjusting the water return temperature control value of the evaporator according to different water return temperatures of the condenser within a period of time;
calculating a heat pump unit COP value corresponding to an evaporator return water temperature control value according to the acquired heat pump unit power consumption and the calculated heat pump unit output heat;
and fitting the COP value of the heat pump unit corresponding to the condenser backwater temperature and the evaporator backwater temperature control value on a two-dimensional coordinate to obtain a COP-backwater temperature curve.
Further, the data analysis module 103 records the operation data of each device collected by the data collection module 101 and the data calculated by the data analysis module 102 every time the data analysis module 102 calculates the boiler output load, the heat recovery heat of the heat pump unit and the output heat value of the heat pump unit, and performs fitting correction on the boiler load-return water temperature curve and the COP-return water temperature curve in the correction time period.
In one embodiment, based on a boiler load-return water temperature curve and a COP-return water temperature curve, an information benefit evaluation module 104 gives heat pump unit control parameters including an evaporation temperature setting value and a condensation temperature setting value in a heat pump unit according to a section with a large heat pump energy efficiency ratio, and obtains a system effective yield by combining a current boiler output load value and a preset evaluation mechanism; further, by comparing the recovered heat under different working conditions, combining the current unit price of the fuel gas and the current unit price of the power consumption energy, and considering the power consumption reduction value, the economic accounting comparison is performed on the waste heat recovery system, and a better evaporation temperature and condensation temperature control value is given, as shown in fig. 4.
In an embodiment, the data synchronization distribution module 105 receives the set better control data obtained by the comparison and correction of the information benefit evaluation module 104, including the control values of the evaporation temperature and the condensation temperature, and further sends the set better control data obtained by the comparison and correction to the heat pump controller, the electric control valve for the operation flow, and the water pump controller, so as to realize the fine control of the heat pump and the water pump.
The intelligent deep waste heat recovery regulation and control device can realize deep waste heat recovery and effectively reduce the exhaust smoke temperature at the tail of the boiler, and achieves the purpose of reducing white smoke while recovering waste heat.
This degree of depth waste heat recovery intelligent control device realizes the debugging that becomes more meticulous to waste heat recovery system, guarantees that waste heat recovery system remains throughout in high-efficient running state.
The intelligent deep waste heat recovery regulation and control device establishes a system income evaluation mechanism, and is combined with the current unit price of gas and power consumption energy sources to carry out economic evaluation and debugging on the system.
Example two
Fig. 5 is a flowchart of an intelligent deep waste heat recovery control method according to a second embodiment of the present invention.
In this embodiment, the intelligent deep waste heat recovery control method is implemented based on the intelligent deep waste heat recovery control device 10.
As shown in fig. 5, the intelligent deep waste heat recovery control method specifically includes the following steps, and according to different requirements, the order of the steps in the flowchart may be changed, and some steps may be omitted.
Step S201, collecting operation data of each device in the waste heat recovery system.
In one embodiment, the operation data of each device in the waste heat recovery system is collected through the intelligent deep waste heat recovery control device 10.
This waste heat recovery system includes boiler and heat pump set, and heat pump set includes evaporimeter and condenser, is connected with heat meter, thermometer and pressure gauge respectively on the pipeline that boiler, evaporimeter and condenser are connected, and degree of depth waste heat recovery intelligent control device 10 is connected respectively to heat meter, thermometer and pressure gauge. The operation data of the boiler, the evaporator and the condenser are obtained by collecting the measurement values of the heat meter, the thermometer and the pressure meter in the intelligent deep waste heat recovery control device 10.
The operational data of the boiler, the evaporator and the condenser include, but are not limited to, boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow and heat pump unit power consumption.
Further, the unit price of the fuel gas and the electricity is obtained through the intelligent deep waste heat recovery control device 10.
And step S202, calculating boiler output load, heat recovery heat and output heat of the heat pump unit according to the acquired operation data of each device.
In an embodiment, the intelligent deep waste heat recovery control device 10 calculates the output load of the boiler according to the collected boiler circulation flow and the collected boiler water supply and return temperature, and further calculates the heat recovery heat of the heat pump unit and the output heat of the heat pump unit according to the collected evaporator water supply temperature, evaporator water return temperature, condenser water supply temperature, condenser water return temperature, evaporator circulation flow and condenser circulation flow of the heat pump unit.
Further, the intelligent deep waste heat recovery control device 10 compares the collected upper limit values respectively set for the boiler water supply and return temperature, the boiler water supply and return pressure, the evaporator water supply temperature, the evaporator water return temperature, the condenser water supply temperature and the condenser water return temperature, and gives an alarm prompt when the temperatures and pressures of the boiler, the evaporator and the condenser in the system exceed the set upper limit values.
Step S203, recording operation data of each device collected in multiple time periods, calculated boiler output load, heat recovery heat of the heat pump unit and output heat data, and performing mapping analysis on the data recorded in a certain time period to form a boiler load-return water temperature curve and a COP-return water temperature curve.
In an embodiment, data such as boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow, and heat pump unit power consumption collected in a plurality of time periods are recorded by the deep waste heat recovery intelligent control device 10, and the calculated boiler output load, heat recovery heat of the heat pump unit, and output heat of the heat pump unit are further recorded.
The deep waste heat recovery intelligent control device 10 performs mapping analysis on data such as recorded boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator supply water temperature, evaporator return water temperature, condenser supply water temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow, heat pump unit power consumption and the like, and data such as boiler output load, heat recovery heat of the heat pump unit and output heat of the heat pump unit to form a boiler load-return water temperature curve and a COP-return water temperature curve.
The forming method of the boiler load-return water temperature curve comprises the following steps:
acquiring boiler return water temperature data acquired within a period of time and corresponding boiler output load data obtained through calculation;
and fitting the boiler return water temperature acquired within a period of time and the corresponding boiler output load obtained by calculation on a two-dimensional coordinate to obtain a boiler load-return water temperature curve.
The COP-return water temperature curve includes COP curves corresponding to different evaporation temperatures and condensation temperatures.
The forming method of the COP-backwater temperature curve comprises the following steps:
acquiring the water return temperature of the condenser and the power consumption data of the heat pump unit within a period of time, and adjusting the water return temperature control value of the evaporator according to different water return temperatures of the condenser within a period of time;
calculating a COP value corresponding to an evaporator return water temperature control value according to the collected heat pump unit power consumption and the calculated heat pump unit output heat;
and fitting the COP values corresponding to the condenser backwater temperature and the evaporator backwater temperature control value on a two-dimensional coordinate to obtain a COP-backwater temperature curve.
Further, the deep waste heat recovery intelligent control device 10 records the collected operation data of each device and the calculated boiler output load, heat recovery heat of the heat pump unit and output heat value of the heat pump unit every time the boiler output load, the heat recovery heat of the heat pump unit and the output heat value of the heat pump unit are calculated, and performs fitting correction on the boiler load-return water temperature curve and the COP-return water temperature curve in the correction time period.
And S204, based on the boiler load-return water temperature curve and the COP-return water temperature curve, setting heat pump unit control parameters according to a region with a large heat pump energy efficiency ratio, combining a current boiler output load value and a preset evaluation mechanism to obtain the effective profitability of the system, and setting optimal evaporation temperature and condensation temperature control values through economic accounting comparison.
In one embodiment, the effective yield of the system is obtained by setting heat pump unit control parameters including an evaporation temperature setting value and a condensation temperature setting value in the heat pump unit and combining a current boiler output load value and a preset evaluation mechanism according to a section with a large heat pump energy efficiency ratio by the intelligent deep waste heat recovery control device 10 based on a boiler load-return water temperature curve and a COP-return water temperature curve; further through the comparison of the recovered heat under different working conditions, the current unit price of the fuel gas and the power consumption energy is combined, meanwhile, the power consumption reduction value is considered, the economic calculation comparison is carried out on the waste heat recovery system, and a better evaporation temperature and condensation temperature control value is given.
Step S205 is used to output the control values of the preferred evaporation temperature and condensation temperature.
In an embodiment, the deep waste heat recovery intelligent control device 10 issues the set optimal control data obtained by the comparison and correction to the heat pump controller, the electric regulating valve for the operation flow, and the water pump controller, so as to realize the fine control of the heat pump and the water pump.
The intelligent deep waste heat recovery regulation and control method can realize deep waste heat recovery and effectively reduce the exhaust gas temperature at the tail of the boiler, and achieves the purposes of waste heat recovery and white smoke reduction.
The intelligent deep waste heat recovery regulation and control method realizes fine debugging of the waste heat recovery system and ensures that the waste heat recovery system is always kept in a high-efficiency operation state.
The intelligent deep waste heat recovery regulation and control method establishes a system profit evaluation mechanism, and is combined with the current unit price of gas and power consumption energy sources to carry out economic evaluation and debugging on the system.
The above-described embodiments should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a degree of depth waste heat recovery intelligent regulation and control device which characterized in that includes:
the data acquisition module is used for acquiring the operation data of each device in the waste heat recovery system;
the data processing module is used for receiving the operation data of each device acquired by the data acquisition module, wherein the operation data of each device comprises but is not limited to boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator water supply temperature, evaporator return water temperature, condenser water supply temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow and heat pump unit power consumption; calculating the output load of the boiler according to the acquired boiler circulation flow and the boiler supply and return water temperature; further calculating the heat recovery heat of the heat pump unit and the output heat of the heat pump unit according to the acquired water supply temperature of the evaporator, the water return temperature of the evaporator, the water supply temperature of the condenser, the water return temperature of the condenser, the circulation flow of the evaporator and the circulation flow of the condenser in the heat pump unit;
the data analysis module is used for recording the operation data of each device acquired by the data acquisition module in multiple time periods and the boiler output load, the heat recovery heat and the output heat data of the heat pump unit calculated by the data processing module, and performing mapping analysis on the data recorded in the given time period to form a boiler load-return water temperature curve and a COP-return water temperature curve;
the system comprises an information benefit evaluation module, a heat pump set control module, an evaporation temperature control module, a condensation temperature control module and a heat pump set control module, wherein the information benefit evaluation module is used for setting heat pump set control parameters according to a boiler load-return water temperature curve and a COP-return water temperature curve and a heat pump energy efficiency optimal interval, obtaining the effective profitability of the system by combining a current boiler output load value and a preset evaluation mechanism, and setting appropriate evaporation temperature and condensation temperature control values through economic accounting comparison;
and the data synchronous distribution module is used for outputting given control values of the evaporation temperature and the condensation temperature.
2. The intelligent deep waste heat recovery control device according to claim 1, wherein the method for forming a boiler load-return water temperature curve by the data analysis module comprises the following steps:
acquiring boiler return water temperature data acquired within a period of time and corresponding boiler output load data obtained through calculation;
fitting the boiler return water temperature acquired within a period of time and the corresponding boiler output load obtained through calculation on a two-dimensional coordinate to obtain a boiler load-return water temperature curve;
further, the method for forming the COP-return water temperature curve by the data analysis module comprises the following steps:
acquiring the water return temperature of the condenser and the power consumption data of the heat pump unit within a period of time, and adjusting the water return temperature control value of the evaporator according to different water return temperatures of the condenser within a period of time;
calculating a heat pump unit COP value corresponding to an evaporator return water temperature control value according to the acquired heat pump unit power consumption and the calculated output heat of the heat pump unit;
and fitting the COP value of the heat pump unit corresponding to the condenser backwater temperature and the evaporator backwater temperature control value on a two-dimensional coordinate to obtain a COP-backwater temperature curve.
3. The intelligent deep waste heat recovery control device according to claim 1, wherein the method for the information benefit evaluation module to give the appropriate control values of the evaporation temperature and the condensation temperature is as follows:
based on a boiler load-return water temperature curve and a COP-return water temperature curve, setting heat pump unit control parameters including an evaporation temperature setting value and a condensation temperature setting value according to a region with a large heat pump energy efficiency ratio;
combining the current boiler output load value and a preset evaluation mechanism to obtain the effective yield of the system;
the heat recovery heat is compared under different working conditions, the current unit price of the fuel gas and the power consumption energy and the power consumption reduction value are combined, the economic accounting comparison is carried out on the waste heat recovery system, and the appropriate control values of the evaporation temperature and the condensation temperature are given.
4. An intelligent regulation and control method for deep waste heat recovery is characterized by comprising the following steps:
collecting operation data of each device in the waste heat recovery system, wherein the operation data of each device comprises but is not limited to boiler supply and return water temperature, boiler supply and return water pressure, boiler circulation flow, evaporator water supply temperature, evaporator return water temperature, condenser water supply temperature, condenser return water temperature, evaporator circulation flow, condenser circulation flow and heat pump unit power consumption;
calculating the output load of the boiler according to the acquired boiler circulation flow and the boiler supply and return water temperature; further calculating the heat recovery heat of the heat pump unit and the output heat of the heat pump unit according to the acquired water supply temperature of the evaporator, the water return temperature of the evaporator, the water supply temperature of the condenser, the water return temperature of the condenser, the circulation flow of the evaporator and the circulation flow of the condenser in the heat pump unit;
recording operation data of each device collected in multiple time periods and calculated boiler output load, heat recovery heat of a heat pump unit and output heat data, and performing mapping analysis on the data recorded in a given time period to form a boiler load-backwater temperature curve and a COP-backwater temperature curve;
based on a boiler load-return water temperature curve and a COP-return water temperature curve, according to the optimal heat pump energy efficiency interval, giving heat pump unit control parameters, combining the current boiler output load value and a preset evaluation mechanism to obtain the effective yield of the system, and giving appropriate evaporation temperature and condensation temperature control values through economic accounting comparison;
and outputting the given control values of the evaporation temperature and the condensation temperature.
5. The intelligent deep waste heat recovery control method according to claim 4, wherein the boiler load-return water temperature curve is formed by a method comprising the following steps:
acquiring boiler return water temperature data acquired within a period of time and corresponding boiler output load data obtained through calculation;
fitting the boiler return water temperature acquired within a period of time and the corresponding boiler output load obtained through calculation on a two-dimensional coordinate to obtain a boiler load-return water temperature curve;
further, the forming method of the COP-backwater temperature curve comprises the following steps:
acquiring the water return temperature of the condenser and the power consumption data of the heat pump unit within a period of time, and adjusting the water return temperature control value of the evaporator according to different water return temperatures of the condenser within a period of time;
calculating a heat pump unit COP value corresponding to an evaporator return water temperature control value according to the acquired heat pump unit power consumption and the calculated output heat of the heat pump unit;
and fitting the COP value of the heat pump unit corresponding to the condenser backwater temperature and the evaporator backwater temperature control value on a two-dimensional coordinate to obtain a COP-backwater temperature curve.
6. The intelligent deep waste heat recovery control method according to claim 4, wherein the evaporation temperature and condensation temperature control values are given by:
based on a boiler load-return water temperature curve and a COP-return water temperature curve, setting heat pump unit control parameters including an evaporation temperature setting value and a condensation temperature setting value according to a region with a large heat pump energy efficiency ratio;
combining the current boiler output load value and a preset evaluation mechanism to obtain the effective yield of the system;
the heat recovery heat is compared under different working conditions, the current unit price of the fuel gas and the power consumption energy and the power consumption reduction value are combined, the economic accounting comparison is carried out on the waste heat recovery system, and the appropriate control values of the evaporation temperature and the condensation temperature are given.
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