CN110953574A - Method and device for determining minimum peak load regulation of boiler - Google Patents
Method and device for determining minimum peak load regulation of boiler Download PDFInfo
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- CN110953574A CN110953574A CN201911225003.4A CN201911225003A CN110953574A CN 110953574 A CN110953574 A CN 110953574A CN 201911225003 A CN201911225003 A CN 201911225003A CN 110953574 A CN110953574 A CN 110953574A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
- F22B35/18—Applications of computers to steam boiler control
Abstract
The invention provides a method and a device for determining minimum peak load regulation of a boiler, comprising the following steps: adjusting peak regulation loads, and determining boiler safe operation detection results corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of a stable combustion state parameter, a hydrodynamic force safety parameter, a denitration adaptability parameter and an auxiliary machine adaptability parameter; and acquiring the minimum peak load of each parameter in the boiler safe operation detection result within a safe range, and setting the minimum peak load as the minimum operation peak load of the boiler so as to ensure the safe operation of the boiler under the condition of energy conservation. And if one or more of the stable combustion state parameter, the hydrodynamic safety parameter, the denitration adaptability parameter and the auxiliary machine adaptability parameter is/are not in the safety range, the corresponding peak load regulation is eliminated, and the minimum peak load regulation is selected from all the rest peak load regulation, namely the minimum peak load regulation of the boiler.
Description
Technical Field
The application belongs to the technical field of thermal power generation, and particularly relates to a method and a device for determining minimum peak shaving load of a boiler.
Background
In some cases, the thermal power generating unit needs to be in a low-load operating state because of the high load power consumption load, the high power generation capacity of other renewable energy power generation equipment, and the like. However, as the load decreases, the operating state of the main and auxiliary machines of the thermal power generating unit gradually deviates from the optimum operating state at the time of design. For example, as the peak load is reduced, the temperature and combustion stability of the hearth of the pulverized coal combustion furnace are reduced, the capability of adapting to the change of working conditions is weakened, and fire extinguishing accidents can be caused by smaller load disturbance; similarly, since various auxiliary machines of the thermal power generating unit are in a low-power operating state, the regulating capability thereof is also deteriorated, and a shutdown accident is easily caused.
At present, in order to ensure that a thermal power unit does not have production accidents when the peak regulation is in a low-load working state, the operation of the thermal power unit mainly considers that the operation states of a pulverized coal combustion furnace and a steam boiler are in operation states recommended by equipment manufacturers; the control does not take the working states of various auxiliary machines into consideration, the reasonable matching of all parts of the whole thermal power generating unit and the like, and the optimal minimum peak load of the unit cannot be determined.
Disclosure of Invention
The application provides a method and a device for determining minimum peak load of a boiler, which are used for at least solving the problems that in the prior art, only parameters of a steam turbine and a thermodynamic system are considered in the process of determining the minimum peak load of the boiler, the operation condition of the boiler system is not considered comprehensively, and the deep peak load capacity of a unit cannot be determined integrally.
According to one aspect of the present application, there is provided a method for determining a minimum peak shaver load of a boiler, comprising:
adjusting peak regulation loads, and determining boiler safe operation detection results corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of a stable combustion state parameter, a hydrodynamic force safety parameter, a denitration adaptability parameter and an auxiliary machine adaptability parameter;
and acquiring the minimum peak load of each parameter in the boiler safe operation detection result within a safe range, and setting the minimum peak load as the minimum operation peak load of the boiler so as to ensure the safe operation of the boiler under the condition of energy conservation.
In one embodiment, obtaining the minimum peak load that each parameter in the boiler safe operation detection result is within the safe range includes:
acquiring boiler limit load which enables all parameters in the boiler safe operation detection result to be within a safe range;
and selecting the minimum value in the limit loads of all the boilers, wherein the minimum value is the minimum peak load.
In one embodiment, the obtaining of the boiler limit load for making each parameter in the detection result of the safe operation of the boiler be within the safe range includes at least one of the following:
determining the minimum peak load regulation which enables the combustion intensity of the hearth and the negative pressure fluctuation level value to be in a safe range as a first boiler limit load;
determining the minimum peak load regulation which enables the hydrodynamic cycle check parameter and the wall temperature safety check parameter to be in a safety range as the second boiler limit load;
determining the minimum peak load regulation which enables the denitration inlet temperature, the denitration inlet flue gas distribution and the denitration outlet ammonia overflow content to be within a safe range as the third boiler limit load;
and determining the minimum peak load regulation which enables the auxiliary machine safety evaluation parameter to be in a safety range as the fourth boiler limit load.
In one embodiment, adjusting the peak load comprises:
and adjusting the peak load from top to bottom.
According to another aspect of the present invention, there is provided an apparatus for determining a minimum peak shaving load of a boiler, comprising:
the peak regulation testing unit is used for adjusting peak regulation loads and determining safe operation detection results of the boilers corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of a stable combustion state parameter, a hydrodynamic force safety parameter, a denitration adaptability parameter and an auxiliary machine adaptability parameter;
and the minimum peak load regulation determining unit is used for acquiring the minimum peak load regulation which enables all parameters in the boiler safe operation detection result to be in a safe range, and setting the minimum peak load regulation as the minimum operation peak load regulation of the boiler so as to ensure that the boiler safely operates under the condition of energy conservation.
In an embodiment, the minimum peak shaver load determining unit includes:
the load limiting acquisition module is used for acquiring boiler load limiting which enables all parameters in the boiler safe operation detection result to be within a safe range;
and the minimum value determining module is used for selecting the minimum value in the limit loads of all the boilers, wherein the minimum value is the minimum peak load.
In one embodiment, the limit load obtaining module includes at least one of:
the first load limiting module is used for determining the minimum peak load regulation which enables the combustion intensity of the hearth and the negative pressure fluctuation level value to be in a safety range as the first boiler limiting load;
the second load limiting module is used for determining the minimum peak load regulation which enables the hydrodynamic cycle check parameters and the wall temperature safety check parameters to be in the safety range as the second boiler load limiting;
the third load limiting module is used for determining the minimum peak load regulation which enables the denitration inlet temperature, the denitration inlet flue gas distribution and the denitration outlet ammonia overflow content to be within a safe range as the third boiler load limiting;
and the fourth load limiting module is used for determining the peak load regulation which enables the auxiliary machine safety evaluation parameter to be the minimum in the safety range to be the fourth boiler load limiting module.
In one embodiment, a peak shaver test unit includes:
and the peak regulation module is used for adjusting the peak regulation load from top to bottom.
According to the method and the device for determining the minimum peak load of the boiler, the whole boiler system is divided into 4 functional fields, and then parameters of the 4 functional fields during peak load regulation change are comprehensively considered, so that the deep peak load regulation capacity of the boiler unit is determined on the whole.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for determining a minimum peak shaving load of a boiler according to the present application.
Fig. 2 is a flowchart of a method for obtaining a minimum peak shaving load in the embodiment of the present application.
Fig. 3 is a block diagram illustrating a structure of an apparatus for determining a minimum peak shaving load of a boiler according to the present invention.
Fig. 4 is a specific implementation of an electronic device provided in an embodiment of the present application.
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.
Before analyzing the embodiments of the method provided in this specification, the boiler plant mentioned in the embodiments is first introduced.
The boiler set is a set which heats water in a steam boiler by adopting fuels such as coal, oil or combustible gas, etc., so as to increase the temperature and pressurize the water, and then pushes a gas turbine to generate electricity by the pressurized steam. The boiler unit (system) comprises a combustion system, a water vapor system and a power generation system. The combustion system can be divided into a combustion furnace, an auxiliary machine and a denitration device, the water vapor system mainly comprises a steam boiler, a steam turbine and a water circulation pipeline, and the power generation system comprises a generator, a transformer and related power distribution equipment.
In practical application, because the power generation system is a load for generating electric energy in the boiler unit and has little influence on the peak shaving characteristic of the boiler unit, the embodiment of the specification does not pay attention to the load, but pays more attention to the combustion system and the water vapor system; likewise, because the steam turbine is primarily the load in the boiler unit, the embodiments of the present description are not concerned with its effect on peak load. In particular, the embodiments of the present disclosure mainly focus on the operating characteristics of the combustion furnace, the auxiliary machine, the denitration device in the combustion system, and the steam boiler in the steam system.
It should be noted that each device in the boiler plant is provided with a corresponding sensor for detecting the operating characteristics of each device; the sensors may be temperature sensors, pressure sensors, acceleration sensors and optical radiation sensors (e.g. fire detectors), electromagnetic sensors, etc. Wherein, the sensors arranged in the combustion furnace comprise a temperature sensor (such as a thermocouple), a pressure sensor (a gas pressure sensor) and a granularity sensor; the auxiliary machine is provided with an acceleration sensor for monitoring the vibration state, a proximity sensor or a flow sensor for monitoring the fuel flow characteristic of the auxiliary machine, and the like; the denitration device comprises a temperature sensor and a flow sensor which are arranged at an inlet, and an ammonia detection sensor which is arranged at an outlet; the steam boiler is provided with a temperature sensor and a water flow sensor.
FIG. 1 is a flow chart of a method for determining a minimum peak shaving load of a boiler according to the present application. As shown in fig. 1, includes:
s101: adjusting peak regulation loads, and determining boiler safe operation detection results corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of stable combustion state parameters, hydrodynamic force safety parameters, denitration adaptability parameters and auxiliary engine adaptability parameters.
In step S101, the boiler unit is adjusted to different peak load states, the boiler unit is made to operate stably for a period of time under different peak load states, signals detected and output by the sensors of the respective systems are obtained after the boiler unit operates stably for a period of time, and the signals are processed to obtain parameters corresponding to the signals. The parameters corresponding to these signals include: one or more of a stable combustion state parameter, a hydrodynamic safety parameter, a denitration adaptability parameter and an auxiliary engine adaptability parameter.
And the stable combustion state parameters represent the evaluation of low-load stable combustion capacity, including the aspects of the state of a pulverizing system, the combustion intensity of a hearth, the negative pressure fluctuation level and the like.
The combustion intensity of the hearth is the lowest temperature measured by temperature sensors arranged in different areas in the combustion furnace, and if the lowest temperature is lower than the ignition temperature of the fuel, the temperature of the hearth is determined not to be in a safe range.
The negative pressure fluctuation level value is obtained by comprehensively processing signals output by the pressure sensor and the fire detector, and if the negative pressure fluctuation exceeds an expected value or the fire detector disappears, the negative pressure fluctuation level value is determined not to be in a safety range.
The state of the pulverizing system comprises the fineness of the pulverized coal, the air quantity deviation of the pulverized coal pipe and the concentration data of the pulverized coal. If the coal powder fineness, the coal powder pipe air quantity deviation and the coal powder concentration data are not in the relevant standard range, the stable combustion state parameter of the combustion furnace can be determined to be not in the safe range any more.
The hydrodynamic safety parameters reflect the safe operating conditions of the steam boiler. The hydrodynamic safety parameters comprise hydrodynamic circulation checking parameters, wall temperature safety checking parameters and direct current critical load values. The hydrodynamic circulation checking parameters are obtained by theoretically calculating or actually measuring data such as mass flow, minimum flow rate and the like of the evaporation heating surface; and if the hydrodynamic circulation checking parameter is smaller than the standard limit value, determining that the hydrodynamic circulation checking parameter is not in the safety range.
Denitration adaptability parameter reaction denitrification facility's safe operating conditions. The denitration adaptability parameters may include denitration inlet flue gas temperature distribution, denitration inlet flue gas distribution, and denitration outlet ammonia escape distribution. The temperature of the denitration flue gas directly influences the redox reaction state of nitrogen oxides and sulfur oxides in the flue gas and ammonia, and the temperature of a denitration inlet reflects the temperature of the flue gas entering a denitration device; and if the denitration temperature is lower than the allowable temperature (generally 280-310 ℃) of the denitration catalyst, judging that the denitration inlet temperature is not in a safe range.
Whether the inlet flow field of the denitration inlet flue gas distribution reaction flue gas at the inlet of the denitration device is uniform or not is judged; if the deviation of the values detected by the respective flow sensors exceeds a certain ratio (for example, the deviation of the measured values exceeds 10%, or the deviation of the nitrogen oxides exceeds the expected value of 800mg/m3), it is determined that the denitration inlet flue gas distribution is not within the safe range.
Whether the oxidation-reduction reaction of the ammonia overflowing from the denitration outlet in the denitration device is normally carried out or not and whether the ammonia usage amount is too large or not are judged; if the denitration outlet ammonia overflows the state reaction and has great ammonia content, then the oxidation-reduction reaction is unusual in the reaction denitration device.
And the estimation adaptability evaluation comprises an auxiliary machine operation mode, an auxiliary machine regulation characteristic and an auxiliary machine safety evaluation. The auxiliary machine regulation characteristic is obtained by testing whether the output of the coal mills in different combination modes is lower than a design value by changing the combination mode of a plurality of coal mills.
In a specific embodiment, when the boiler unit is a coal-electric unit, the auxiliary machinery mainly includes a coal mill and a fan (which may be further divided into a blower and an exhaust fan). The auxiliary machinery adaptability parameters comprise vibration characteristics of the coal mill, blockage characteristics of the coal mill and working characteristics of the fan. When the thermal power generating unit operates in a low power consumption state, the coal mill is in a low-speed operation state, and large mechanical vibration can occur to the coal mill and cause machine body resonance because the processing coal amount is small. Whether the coal mill is blocked or not is considered whether the coal mill cannot break coal blocks with larger sizes due to low-speed operation and the coal blocks are stuck in the equipment to cause equipment halt or the coal mill pipeline is blocked due to coal dust stagnation. The working characteristics of the fan mainly test whether the fan has the problems of surge, stall and exceeding the working area.
And the auxiliary machine adaptability parameters are in the safe range only under the condition that the vibration characteristic of the coal mill, the blocking characteristic of the coal mill and the working characteristic of the fan are in the safe range.
S102: and acquiring the minimum peak load of each parameter in the boiler safe operation detection result within a safe range, and setting the minimum peak load as the minimum operation peak load of the boiler so as to ensure the safe operation of the boiler under the condition of energy conservation.
In step S102, according to the operation data in S101, a minimum peak load capable of safely operating each parameter in the boiler safe operation detection result is found, if only one of the steady combustion state parameter, the hydrodynamic safety parameter, the denitration adaptability parameter and the auxiliary machine adaptability parameter is not within the safe range, the corresponding peak load is removed, and a peak load with the minimum output power is selected from the remaining peak loads to be set as the minimum peak load of the boiler, that is, the minimum peak load is the minimum peak load value ensuring the normal operation of the boiler unit.
The main execution body of the method shown in fig. 1 may be a server, a PC, and a mobile terminal, and the method implements a function of comprehensively considering the operation condition of the boiler system through a stable combustion state parameter, a hydrodynamic safety parameter, a denitration adaptability parameter, and an auxiliary machine adaptability parameter, and a corresponding peak load is eliminated as long as one of the stable combustion state parameter, the hydrodynamic safety parameter, the denitration adaptability parameter, and the auxiliary machine adaptability parameter is not within a safety range; and selecting the peak shaving load with the minimum output power from all the rest peak shaving loads, namely the minimum peak shaving load of the boiler unit. According to the operation characteristics of the boiler unit, the normal operation of the boiler unit can be ensured under various peak load loads which are larger than the minimum peak load. In actual production, if the peak load of the boiler unit needs to be reduced, the minimum peak load can be reduced without causing the boiler unit to break down, and the normal operation of the unit is ensured.
In one embodiment, obtaining the minimum peak load that makes each parameter in the detection result of the safe operation of the boiler within the safe range, as shown in fig. 2, includes:
s201: and acquiring the boiler limit load which enables all parameters in the boiler safe operation detection result to be in a safe range.
Namely, the minimum peak load corresponding to one or more of the stable combustion state parameter, the hydrodynamic safety parameter, the denitration adaptability parameter, the auxiliary machine adaptability parameter and the like in a safety range is obtained as the boiler limit load.
S202: and selecting the minimum value in the limit loads of all the boilers, wherein the minimum value is the minimum peak load.
And comprehensively comparing the limited loads of the boilers obtained in the step S201, and selecting a minimum value from the limited loads, namely under the condition of the minimum value, each device in the boiler unit is safely operated, so that the minimum value is the minimum peak load of the boiler.
In one embodiment, the boiler limit load which enables each parameter in the boiler safe operation detection result to be in a safe range is obtained, and the method comprises at least one of the following steps 1) to 4):
1) and determining the minimum peak load regulation which enables the combustion intensity of the hearth and the negative pressure fluctuation level value to be in a safe range as the first boiler limiting load.
In one embodiment, the combustion intensity of the furnace outputs the distribution data of the whole furnace temperature through on-line or in-situ measurement, and gives the lowest temperature of the burner area, compared with the ignition temperature of the pulverized coal calculated theoretically, if the lowest temperature is lower than the ignition temperature, the output of the low-load combustion stability limited-furnace combustion intensity is TRUE (meaning not in a safe range); the negative pressure fluctuation level value needs to monitor the change condition data of the hearth pressure and the coal mill fire detection on line, and if the negative pressure fluctuation range exceeds an expected value (for example 300Pa) or the fire detection disappears, the low-load combustion stabilizing capacity is limited-the negative pressure fluctuation level value is output as TRUE.
In most cases, the state of the pulverizing system is only used as auxiliary detection, but a foundation is provided for evaluating the low-load combustion stabilizing capability, and the combustion intensity of a hearth and the negative pressure fluctuation level are used as mandatory criteria. The state of the coal pulverizing system is that the data such as coal mill combination mode, coal powder fineness, coal powder pipe air quantity deviation, coal powder concentration and the like are collected or measured, and if the data is not in the range required by relevant standards, the output of the low-load stable combustion capacity alarm-coal pulverizing system is TRUE.
The decomposition of the above-listed embodiments can be expressed as the following relations:
XLoad (low-load combustion stabilizing capability) f (limited low-load combustion stabilizing capability-furnace combustion intensity OR limited low-load combustion stabilizing capability-negative pressure fluctuation level OR K1 x' low-load combustion stabilizing capability alarm-powder making system), wherein K1 is a weight coefficient of an alarm term, defaults to 1, and can be manually modified to 0 OR 1; and if any one of the outputs in f () is "TRUE", then the output of XLOAD (low-load combustion stabilizing capability) is "TRUE", which represents that the low-load combustion stabilizing capability is limited and triggered, and the current boiler load is recorded and corresponds to the "first boiler limited load".
2) And determining the minimum peak load regulation which enables the hydrodynamic cycle check parameter and the wall temperature safety check parameter to be in a safety range as the second boiler limit load.
In a specific embodiment, the hydrodynamic cycle check parameter represents a hydrodynamic safety assessment, similar to a low-load stable combustion assessment, and is realized by three aspects of the second stage, wherein the three aspects are mandatory criteria, and any aspect limits the hydrodynamic safety level of the boiler. The hydrodynamic circulation check is that data such as mass flow, minimum flow rate and the like of the evaporation heating surface are calculated theoretically or actually measured, and if the data are smaller than a standard limit value (for example, the mass flow is smaller than 400kg/(m2 & s)), the output of the hydrodynamic safety limitation-hydrodynamic circulation check is TRUE. As a large-scale power station boiler has more heating surfaces, the wall temperature condition of a representative heating surface needs to be measured on line (a direct-current boiler generally has wall temperature measuring points and can be directly used; if a subcritical boiler does not have the wall temperature measuring points, the representative installation measuring points need to be selected according to the hydrodynamic circulation checking condition), under any working condition in the test process, the wall temperature of each stage of the heating surface is smaller than the wall temperature allowable value (the wall temperature allowable value is generally provided by an equipment factory), and if the wall temperature exceeds the allowable value and lasts for 1 minute, the hydrodynamic safety limitation-wall temperature is output as TRUE. The once-through critical load is required for hydrodynamic multivalueness which is easy to occur in the deep peak regulation process of the once-through boiler, and is not suitable for the drum boiler. The direct current critical load requires measuring the water supply amount entering the water wall, judging whether the water supply amount is above the designed minimum water supply flow (generally 30% of the maximum water supply flow), otherwise outputting the 'hydrodynamic safety limitation-direct current critical load' as TRUE.
The decomposition of the above-listed embodiments can be expressed as the following relations:
YLoad (hydrodynamic safety) ═ f (hydrodynamic safety limited-hydrodynamic cycle check OR hydrodynamic safety limited-wall temperature OR hydrodynamic safety limited-dc critical load), corresponds to "second boiler limited load".
3) And determining the minimum peak load regulation which enables the denitration inlet temperature, the denitration inlet flue gas distribution and the denitration outlet ammonia overflow content to be within the safe range as the third boiler limit load.
In a specific embodiment, the denitration inlet temperature distribution is a mandatory criterion, and the denitration inlet flue gas distribution and the denitration outlet ammonia escape distribution are auxiliary criteria. The sectional area of a flue at a denitration inlet (outlet) is large, so that the whole section cannot be truly reflected by the general online single-point measurement, and therefore, the denitration adaptability evaluation requirement is comprehensively measured. By means of measurement of denitration inlet flue gas temperature, denitration inlet flue gas components and denitration outlet ammonia escape distribution of an instrument, data such as denitration inlet flue gas temperature are obtained, if the lowest value of the denitration inlet flue gas temperature is lower than the allowable temperature (generally 280-310 ℃) of a denitration catalyst, a denitration system is pushed out, and at the moment, "denitration adaptability evaluation limited-denitration inlet temperature" is output as TRUE. Meanwhile, whether the flow field of the denitration inlet is uniform or not is judged according to the acquired denitration inlet flue gas distribution (oxygen, nitrogen oxide and the like), and if the deviation of the measured values of all the positions exceeds 10% or the inlet nitrogen oxide (converted to a standard condition) exceeds an expected value (such as 800mg/Nm3), the 'denitration adaptability alarm-denitration inlet flue gas distribution' is output as TRUE. And judging whether ammonia escape influences the safe operation of lower-level equipment or not according to the acquired ammonia escape distribution of the denitration outlet, and outputting the denitration adaptability alarm-denitration outlet ammonia escape distribution as TRUE if the ammonia escape of any measurement position exceeds a design value (for example, 10 ppm).
The above-listed examples were decomposed to yield the following relationships:
MLoad (denitration adaptability) ═ f (denitration adaptability evaluation limited-denitration inlet temperature OR K2 × denitration adaptability alarm-denitration inlet flue gas distribution OR K3 × denitration adaptability alarm-denitration outlet ammonia escape distribution). Wherein K2, K3 are the weight coefficient of alarm item, default 1, can artificially modify to 0 or 1. MLoad (denitration flexibility) corresponds to "third boiler limiting load".
4) And determining the minimum peak load regulation which enables the auxiliary machine safety evaluation parameter to be in a safety range as the fourth boiler limit load.
In a specific embodiment, as the load of the unit is reduced, the operating characteristics of important auxiliary machines such as a boiler induced draft fan, a blower, a primary air fan and a coal pulverizer are changed, and whether safe operation is met or not needs to be detected. The safety evaluation of the auxiliary machine is a mandatory criterion, and the operation mode and the regulation characteristic of the auxiliary machine are auxiliary criteria. The auxiliary machine safety assessment refers to the steps of monitoring on line or measuring whether the vibration of the coal mill exceeds the standard or not in place, whether the coal mill is blocked or not, whether a fan surging or stalling or even exceeding a working area or not, and outputting the 'auxiliary machine adaptability assessment limited-auxiliary machine safety assessment' as TRUE if the parameters of any auxiliary machine are abnormal.
The above-listed examples were decomposed to yield the following relationships:
NLoad (auxiliary adaptability) ═ f (auxiliary adaptability evaluation limited-auxiliary safety evaluation OR K4 × auxiliary adaptability evaluation alarm-auxiliary operation mode OR K5 × auxiliary adaptability evaluation alarm-auxiliary regulation characteristic). Wherein K4, K5 are the weight coefficient of alarm item, default 1, can artificially modify to 0 or 1. NLoad (auxiliary machinery adaptability) corresponds to "fourth boiler limit load".
In one embodiment, adjusting the peak load comprises:
the peak load is adjusted from top to bottom, namely, the load is gradually reduced from high load.
In one embodiment, the peak shaving load is generally adjusted in a top-down adjustment manner to prevent unnecessary failures and to allow for ease of detection.
Based on the same inventive concept, the embodiment of the present application further provides a device for determining a minimum peak load of a boiler, which can be used to implement the method described in the above embodiments, as described in the following embodiments. Because the principle of solving the problem of the device for determining the minimum peak load of the boiler is similar to the method for determining the minimum peak load of the boiler, the implementation of the device for determining the minimum peak load of the boiler can refer to the implementation of the method for determining the minimum peak load of the boiler, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. While the system described in the embodiments below is preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
Fig. 3 is a block diagram of a device for determining a minimum peak load of a boiler according to the present application, as shown in fig. 3, the device includes:
the peak regulation testing unit 301 is configured to adjust peak regulation loads and determine safe operation detection results of boilers corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of stable combustion state parameters, hydrodynamic force safety parameters, denitration adaptability parameters and auxiliary engine adaptability parameters.
And a minimum peak load determining unit 302, configured to obtain a minimum peak load that enables each parameter in the detection result of the safe operation of the boiler to be within a safe range, and set the minimum peak load as the minimum peak load of the safe operation of the boiler, so as to ensure that the boiler operates safely under the condition of energy saving.
In an embodiment, the minimum peak load determining unit 302 includes:
the load limiting acquisition module is used for acquiring boiler load limiting which enables all parameters in the boiler safe operation detection result to be within a safe range;
and the minimum value determining module is used for selecting the minimum value in the limit loads of all the boilers, wherein the minimum value is the minimum peak load.
In one embodiment, the limit load obtaining module includes at least one of:
the first load limiting module is used for determining the minimum peak load regulation which enables the combustion intensity of the hearth and the negative pressure fluctuation level value to be in a safety range as the first boiler limiting load;
the second load limiting module is used for determining the minimum peak load regulation which enables the hydrodynamic cycle check parameters and the wall temperature safety check parameters to be in the safety range as the second boiler load limiting;
the third load limiting module is used for determining the minimum peak load regulation which enables the denitration inlet temperature, the denitration inlet flue gas distribution and the denitration outlet ammonia overflow content to be within a safe range as the third boiler load limiting;
and the fourth load limiting module is used for determining the peak load regulation which enables the auxiliary machine safety evaluation parameter to be the minimum in the safety range to be the fourth boiler load limiting module.
In an embodiment, the peak shaver test unit 301 specifically includes:
and the peak regulation module is used for adjusting the peak regulation load from top to bottom.
The principle and the implementation mode of the present application are explained by applying specific embodiments in the present application, and the description of the above embodiments is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
An embodiment of the present application further provides a specific implementation manner of an electronic device capable of implementing all steps in the method in the foregoing embodiment, and referring to fig. 4, the electronic device specifically includes the following contents:
a processor (processor)401, a memory 402, a communication Interface 403, a bus 404, and a nonvolatile memory 405;
the processor 401, the memory 402 and the communication interface 403 complete mutual communication through the bus 404;
the processor 401 is configured to call the computer programs in the memory 402 and the nonvolatile memory 405, and when the processor executes the computer programs, the processor implements all the steps in the method in the foregoing embodiments, for example, when the processor executes the computer programs, the processor implements the following steps:
s101: adjusting peak regulation loads, and determining boiler safe operation detection results corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of stable combustion state parameters, hydrodynamic force safety parameters, denitration adaptability parameters and auxiliary engine adaptability parameters.
S102: and acquiring the minimum peak load of each parameter in the boiler safe operation detection result within a safe range, and setting the minimum peak load as the minimum operation peak load of the boiler so as to ensure the safe operation of the boiler under the condition of energy conservation.
Embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the method in the above embodiments, where the computer-readable storage medium stores thereon a computer program, and the computer program when executed by a processor implements all the steps of the method in the above embodiments, for example, the processor implements the following steps when executing the computer program:
s101: adjusting peak regulation loads, and determining boiler safe operation detection results corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of stable combustion state parameters, hydrodynamic force safety parameters, denitration adaptability parameters and auxiliary engine adaptability parameters.
S102: and acquiring the minimum peak load of each parameter in the boiler safe operation detection result within a safe range, and setting the minimum peak load as the minimum operation peak load of the boiler so as to ensure the safe operation of the boiler under the condition of energy conservation.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the hardware + program class embodiment, since it is substantially similar to the method embodiment, the description is simple, and the relevant points can be referred to the partial description of the method embodiment. Although embodiments of the present description provide method steps as described in embodiments or flowcharts, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an actual apparatus or end product executes, it may execute sequentially or in parallel (e.g., parallel processors or multi-threaded environments, or even distributed data processing environments) according to the method shown in the embodiment or the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the embodiments of the present description, the functions of each module may be implemented in one or more software and/or hardware, or a module implementing the same function may be implemented by a combination of multiple sub-modules or sub-units, and the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
As will be appreciated by one skilled in the art, embodiments of the present description may be provided as a method, system, or computer program product. Accordingly, embodiments of the present description may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present description may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein. The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment. 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 an embodiment of the specification.
In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. 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. The above description is only an example of the embodiments of the present disclosure, and is not intended to limit the embodiments of the present disclosure. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.
Claims (10)
1. A method for determining a minimum peak shaver load for a boiler, comprising:
adjusting peak regulation loads, and determining boiler safe operation detection results corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of a stable combustion state parameter, a hydrodynamic force safety parameter, a denitration adaptability parameter and an auxiliary machine adaptability parameter;
and acquiring the minimum peak load of each parameter in the boiler safe operation detection result within a safe range, and setting the minimum peak load as the minimum operation peak load of the boiler so as to ensure that the boiler safely operates under the condition of energy conservation.
2. The method for determining according to claim 1, wherein the obtaining of the minimum peak load that each parameter in the boiler safe operation detection result is within a safe range comprises:
acquiring boiler limit load which enables all parameters in the boiler safe operation detection result to be within a safe range;
and selecting the minimum value of the limited loads of the boilers, wherein the minimum value is the minimum peak load.
3. The method for determining according to claim 2, wherein the obtaining of the boiler limit load for which each parameter in the boiler safe operation detection result is within a safe range includes at least one of:
determining the minimum peak load regulation which enables the combustion intensity of the hearth and the negative pressure fluctuation level value to be in a safe range as a first boiler limit load;
determining the minimum peak load regulation which enables the hydrodynamic cycle check parameter and the wall temperature safety check parameter to be in a safety range as the second boiler limit load;
determining the minimum peak load regulation which enables the denitration inlet temperature, the denitration inlet flue gas distribution and the denitration outlet ammonia overflow content to be within a safe range as the third boiler limit load;
and determining the minimum peak load regulation which enables the auxiliary machine safety evaluation parameter to be in a safety range as the fourth boiler limit load.
4. The method of claim 1, wherein the adjusting the peak shaver load comprises:
and adjusting the peak load from top to bottom.
5. An apparatus for determining a minimum peak shaving load of a boiler, comprising:
the peak regulation testing unit is used for adjusting peak regulation loads and determining safe operation detection results of the boilers corresponding to different peak regulation loads; the detection result of the safe operation of the boiler at least comprises one or more of a stable combustion state parameter, a hydrodynamic force safety parameter, a denitration adaptability parameter and an auxiliary machine adaptability parameter;
and the minimum peak load regulation determining unit is used for acquiring the minimum peak load regulation which enables all parameters in the boiler safe operation detection result to be in a safe range, and setting the minimum peak load regulation as the minimum operation peak load of the boiler so as to ensure that the boiler safely operates under the condition of energy conservation.
6. The determination apparatus according to claim 5, wherein the lowest peak load determination unit comprises:
the load limiting acquisition module is used for acquiring boiler load limiting which enables all parameters in the boiler safe operation detection result to be within a safe range;
and the minimum value determining module is used for selecting the minimum value in each boiler limit load, and the minimum value is the minimum peak load.
7. The apparatus of claim 6, wherein the limited load acquisition module comprises at least one of:
the first load limiting module is used for determining the minimum peak load regulation which enables the combustion intensity of the hearth and the negative pressure fluctuation level value to be in a safety range as the first boiler limiting load;
the second load limiting module is used for determining the minimum peak load regulation which enables the hydrodynamic cycle check parameters and the wall temperature safety check parameters to be in the safety range as the second boiler load limiting;
the third load limiting module is used for determining the minimum peak load regulation which enables the denitration inlet temperature, the denitration inlet flue gas distribution and the denitration outlet ammonia overflow content to be within a safe range as the third boiler load limiting;
and the fourth load limiting module is used for determining the peak load regulation which enables the auxiliary machine safety evaluation parameter to be the minimum in the safety range to be the fourth boiler load limiting module.
8. The apparatus according to claim 5, wherein the peak shaver test unit specifically comprises:
and the peak regulation module is used for adjusting the peak regulation load from top to bottom.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the method for determining a minimum peak shaver load for a boiler as claimed in any one of claims 1 to 4.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method for determining a minimum peak load of a boiler according to any one of claims 1 to 4.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112287535A (en) * | 2020-10-21 | 2021-01-29 | 国网山东省电力公司电力科学研究院 | Method and system for determining minimum operation load of thermal power generating unit |
| CN113340355A (en) * | 2021-06-29 | 2021-09-03 | 国网黑龙江省电力有限公司电力科学研究院 | Steam turbine safety regulation and control system under low-load peak regulation operating condition |
| CN113532798A (en) * | 2021-08-10 | 2021-10-22 | 西安热工研究院有限公司 | Method for calculating minimum feed water flow of low load of supercritical power station boiler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2911273A1 (en) * | 2012-10-19 | 2015-08-26 | Panasonic Intellectual Property Management Co., Ltd. | Stand-by power estimation device, program |
| CN107292491A (en) * | 2017-05-23 | 2017-10-24 | 国网山东省电力公司电力科学研究院 | The method that the power network fired power generating unit peak regulation factor is determined based on multiplicity |
| CN109377018A (en) * | 2018-09-27 | 2019-02-22 | 国网河北省电力有限公司电力科学研究院 | Thermal power plant unit peak modulation capacity appraisal procedure |
| US20190147552A1 (en) * | 2017-11-13 | 2019-05-16 | Nec Laboratories America, Inc. | Demand charge and response management using energy storage |
| CN110458724A (en) * | 2019-08-19 | 2019-11-15 | 国网山东省电力公司电力科学研究院 | A method of based on neural network prediction fired power generating unit depth peak modulation capacity |
-
2019
- 2019-12-04 CN CN201911225003.4A patent/CN110953574B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2911273A1 (en) * | 2012-10-19 | 2015-08-26 | Panasonic Intellectual Property Management Co., Ltd. | Stand-by power estimation device, program |
| CN107292491A (en) * | 2017-05-23 | 2017-10-24 | 国网山东省电力公司电力科学研究院 | The method that the power network fired power generating unit peak regulation factor is determined based on multiplicity |
| US20190147552A1 (en) * | 2017-11-13 | 2019-05-16 | Nec Laboratories America, Inc. | Demand charge and response management using energy storage |
| CN109377018A (en) * | 2018-09-27 | 2019-02-22 | 国网河北省电力有限公司电力科学研究院 | Thermal power plant unit peak modulation capacity appraisal procedure |
| CN110458724A (en) * | 2019-08-19 | 2019-11-15 | 国网山东省电力公司电力科学研究院 | A method of based on neural network prediction fired power generating unit depth peak modulation capacity |
Non-Patent Citations (1)
| Title |
|---|
| 王立: "火力发电机组深度调峰试验及优化", 《发电设备》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112287535A (en) * | 2020-10-21 | 2021-01-29 | 国网山东省电力公司电力科学研究院 | Method and system for determining minimum operation load of thermal power generating unit |
| CN112287535B (en) * | 2020-10-21 | 2023-03-31 | 国网山东省电力公司电力科学研究院 | Method and system for determining minimum operation load of thermal power generating unit |
| CN113340355A (en) * | 2021-06-29 | 2021-09-03 | 国网黑龙江省电力有限公司电力科学研究院 | Steam turbine safety regulation and control system under low-load peak regulation operating condition |
| CN113532798A (en) * | 2021-08-10 | 2021-10-22 | 西安热工研究院有限公司 | Method for calculating minimum feed water flow of low load of supercritical power station boiler |
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