CN105570867A - Regulating method and system for direct heat supply flue gas boiler load parameters - Google Patents
Regulating method and system for direct heat supply flue gas boiler load parameters Download PDFInfo
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- CN105570867A CN105570867A CN201511019985.3A CN201511019985A CN105570867A CN 105570867 A CN105570867 A CN 105570867A CN 201511019985 A CN201511019985 A CN 201511019985A CN 105570867 A CN105570867 A CN 105570867A
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- heat supply
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1003—Arrangement or mounting of control or safety devices for steam heating systems
Abstract
The invention provides a regulating method and system for direct heat supply flue gas boiler load parameters. The method comprises the steps that S1, estimated heat supply total heat of all heat supply targets in a heat supply system in a future time interval is obtained; S2, estimated heat supply total heat and actual heat supply total heat of all the heat supply targets in a past time interval are obtained; S3, the estimated heat supply total heat in the future time interval, the estimated heat supply total heat in the past time interval and the actual heat supply total heat in the past time interval are integrated into account to obtain the boiler load parameters in the future time interval; and S4, the step S1, the step S2 and the step S3 are repeated to update the boiler load parameters, and the duration of the future time interval and the duration of the past time interval are the same. According to the regulating method, the water supply temperature of a boiler is regulated according to the obtained boiler load parameters, and the phenomenon that the boiler load parameters fluctuate excessively when being regulated according to the real-time air temperature is avoided, so that resources are saved. Meanwhile, the heat supply temperature of the heat supply targets does not fluctuate hugely due to change of the water supply temperature, so that the heating quality is ensured.
Description
Technical field
The present invention relates to gas fired-boiler control technology field, be specifically related to a kind of control method and system of direct heating gas fired-boiler load parameter.
Background technology
The indirect heating system of heat supply gas fired-boiler as shown in Figure 1, mainly comprises boiler and user.High temperature heat source is produced by boiler, delivers to heat user by heating network.
In the mode of this direct heating, boiler load is a very important parameter, and it refers to the ability that unit interval boiler can produce steam.Before giving user's heat supply, need to set the load of boiler, to reach predetermined heating effect.
But, in prior art, the setting of heat supply gas fired-boiler load mainly relies on the experience of operating personnel to determine, and establishing method mainly does corresponding adjustment according to real-time weather temperature Change to boiler load, cause boiler load parameter fluctuation excessive, cause the waste of resource.
Summary of the invention
The technical problem to be solved in the present invention is: solve heat supply gas fired-boiler load setting method of the prior art and regulate boiler load parameter according to the real-time change of weather, cause boiler load parameter fluctuation excessive, cause the problem of the waste of resource.
For realizing above-mentioned goal of the invention, the invention provides a kind of control method and system of direct heating gas fired-boiler load parameter
According to a first aspect of the present invention, provide a kind of control method of direct heating gas fired-boiler load parameter, comprising:
S1: obtain in future time section, in heating system, all confession thermal targets estimates heat supply total amount of heat;
S2: obtain in time in the past section, allly describedly estimates heat supply total amount of heat and actual heat supply total amount of heat for thermal target;
S3: estimate in comprehensive described future time section in heat supply total amount of heat, time in the past section and estimate heat supply total amount of heat and actual heat supply total amount of heat, obtain the boiler load parameter in described future time section;
S4: repeat step S1 to S3, upgrade described boiler load parameter;
Wherein, the duration of described future time section and described time in the past section is identical.
Wherein, what supply thermal target in described heating system estimates heat supply total amount of heat, calculates according to following formula:
Q
estimate=Q
ms (t
n-t
w)/(t
n1-t
d)
Wherein, Q
estimatefor in described heating system for thermal target estimate heat supply total amount of heat; Q
mthe described architectural design heat load for thermal target place; S is the described heating area for thermal target; t
nfor described for the appointment heating temperature of thermal target; t
w1for the temperature on average of the forecast in the described time period; t
dfor the minimum heating mean temperature required.
Wherein, for the actual heat supply total amount of heat of thermal target in described heating system, calculate according to following formula:
Q
actual=Q
ms (t
n-t
w)/(t
n2-t
d)
Wherein, Q
actualfor the actual heat supply total amount of heat for thermal target in described heating system; Q
mthe described architectural design heat load for thermal target place; S is the described heating area for thermal target; t
nfor described for the appointment heating temperature of thermal target; t
w2for the temperature on average of the reality in the described time period; t
dfor the minimum heating mean temperature required.
Wherein more preferably, described step S3 comprises:
Estimate in comprehensive described future time section in heat supply total amount of heat, time in the past section and estimate heat supply total amount of heat and actual heat supply total amount of heat, obtain the boiler load parameter in described future time section according to following formula:
Wherein, Q ' is the boiler load parameter in described future time section; T is the duration in described future time section and in time in the past section; Q
t1 estimatesfor estimating heat supply total amount of heat in described future time section; Q
t2 estimatesfor estimating heat supply total amount of heat in described time in the past section; Q
t2 is actualfor heat supply total amount of heat actual in described time in the past section.
Wherein more preferably, after described step S4, also comprise:
According to described boiler load parameter, PID control method is utilized to regulate the supply water temperature of described boiler.
Wherein more preferably, the duration of described future time section and described time in the past section is one hour.
According to a second aspect of the present invention, provide a kind of regulating system of direct heating gas fired-boiler load parameter, comprising:
Acquiring unit: for obtaining the weather forecast of future time section;
Memory cell: for storing the Weather information of each time period;
Processing unit: estimate heat supply total amount of heat and actual heat supply total amount of heat for calculating in future time section to estimate in heat supply total amount of heat, time in the past section;
Also for estimating heat supply total amount of heat and actual heat supply total amount of heat according to estimating in future time section in heat supply total amount of heat, time in the past section, obtain the boiler load parameter in described future time section; The supply water temperature of described boiler is regulated according to described boiler load parameter.
The invention provides a kind of control method and system of direct heating gas fired-boiler load parameter.The method by according to current period for thermal target estimate heat supply total amount of heat, the previous cycle estimate for thermal target the boiler load parameter that heat supply total amount of heat and actual heat supply total amount of heat obtain current period, and the supply water temperature of boiler is regulated according to boiler load parameter, avoid boiler load parameter to regulate fluctuation excessive according to real-time temperature, economize on resources.Heat supply temperature simultaneously for thermal target can not produce huge fluctuation because of the change of supply water temperature, ensure to have heated quality.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred embodiment, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is direct heating system architecture schematic diagram in prior art;
Fig. 2 is the heat supply gas fired-boiler load setting method flow diagram that first embodiment of the invention provides.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
As shown in Figure 2, present embodiments provide a kind of control method of direct heating gas fired-boiler load parameter, comprising:
S1, with point of current testing time for benchmark, obtain in future time section, allly in heating system estimate heat supply total amount of heat for thermal target.
Wherein more preferably, what in future time section, supply thermal target in heating system estimates heat supply total amount of heat, calculates according to formula (1):
Q
estimate=Q
ms (t
n-t
w)/(t
n1-t
d) (1)
Wherein, Q
estimatefor in heating system for thermal target estimate heat supply total amount of heat; Q
mfor the architectural design heat load at thermal target place; S is the heating area for thermal target; t
nfor the appointment heating temperature for thermal target; t
w1for the temperature on average of the forecast in the time period; t
dfor the minimum heating mean temperature required.
It should be noted that, architectural design heat load Q
mset according to the actual conditions of building, as the building situation of building, the purposes of building etc.For the appointment heating temperature t of thermal target
nbe as the criterion with the heating standard of government's setting, as the normal temperature of winter heating indoor be 20 degree.The minimum heating mean temperature t required
dfor requiring the outdoor mean temperature of minimum heating heated, for example, general Beijing requires to provide the outdoor mean temperature of heating for-7.6 degree are to 5 degree, if therefore get by the standard of Beijing, then and minimum heating mean temperature t
dfor-7.6 degree.
S2: with point of current testing time for benchmark, obtains in time in the past section, all estimates heat supply total amount of heat and actual heat supply total amount of heat for thermal target.
Wherein, calculate the actual heat supply total amount of heat for thermal target in the time period in the past, calculate according to following formula:
Q
actual=Q
ms (t
n-t
w)/(t
n2-t
d) (4)
In formula (4), Q
actualfor the actual heat supply total amount of heat for thermal target in heating system; Q
mfor the architectural design heat load at thermal target place; S is the heating area for thermal target; t
nfor the appointment heating temperature for thermal target; t
w2for the temperature on average of the reality in the time period; t
dfor the minimum heating mean temperature required.Except t in formula (4)
w2, the implication of other parameters is all identical with the meaning in step S1.
S3: estimate in heat supply total amount of heat, time in the past section in comprehensive future time section and estimate heat supply total amount of heat and actual heat supply total amount of heat, obtain the boiler load parameter in future time section;
Wherein more preferably, estimate in the future time section obtained in combining step S1 in time in the past section that heat supply total amount of heat and step S2 obtain and estimate heat supply total amount of heat and actual heat supply total amount of heat, obtaining the boiler load parameter in future time section according to formula (5), is also the instantaneous energy that boiler should produce:
Wherein, Q ' is the boiler load parameter in future time section, also can be understood as the power of boiler, is also the ability of unit interval boiler develops steam vapor; T is the duration in future time section and in time in the past section; Q
t1 estimatesfor estimating heat supply total amount of heat in future time section; Q
t2 estimatesfor estimating heat supply total amount of heat in time in the past section; Q
t2 is actualfor heat supply total amount of heat actual in time in the past section.
S4: repeat step S1 to S3, upgrades boiler load parameter;
Repeat step S1 to S3 at next testing time point, repeat all to obtain a new boiler load parameter at every turn.According to the situation of change of boiler load parameter, preferably utilize PID to regulate (proportional integral adjustment) method to regulate the supply water temperature of described boiler, the heat that boiler combustion is produced and calculated value keep synchronous.
It should be noted that, the time period in the past in step S2 is identical with the duration of the time period in the future in step S1.For example, suppose that point of current testing time is for point in the morning 9, the duration arranging each time period is 1 hour, and also namely every a test in hour once, the therefore following time period is 9 o'clock to the 10 o'clock morning, and the time period in past is 8 a.m. to 9 points.According between 9 o'clock to 10 o'clock estimate heat supply total amount of heat and at 8 o'clock to 9 o'clock estimate heat supply total amount of heat and actual heat supply total amount of heat, generate the boiler load parameter of 9 o'clock to 10 o'clock time periods, and regulate the boiler combustion situation of 9 o'clock to 10 o'clock according to this boiler load parameter.When 10, test next time, now 9 o'clock to 10 o'clock estimate heat supply total amount of heat and actual heat supply total amount of heat using as the reference value of 10 o'clock to 11 o'clock, calculate the boiler load parameter of 10 o'clock to 11 o'clock.Thus realize the change of the constant duration of boiler load parameter, according to the supply water temperature of the boiler of each period of boiler load state modulator.
Embodiment two
Present embodiments provide a kind of detailed description of the invention of control method of direct heating gas fired-boiler load parameter.Be described as follows:
The identical boiler that 2 bench-types number are ZZS1.40-0.7/95/70-Q-MF7 is installed in a certain test point.Separate unit rated heating capacity is 1.4MW, and specified supply and return water temperature is 95/70 DEG C, and rated pressure is 0.7MPa, and heating system is direct supply system.
Remaining parameter is as follows:
Area of heat-supply service: 2.7 ten thousand square metres;
Winter heating indoor calculate temperature: 20 DEG C;
Outdoor mean air temperature during heating period :-0.9 DEG C;
Beijing requires the outdoor mean daily temperature providing heating :-7.6 DEG C ~+5 DEG C;
Days of heating period: 121 days;
The calorific value of natural gas: 35.16MJ/Nm
3;
Architectural design heat load (Q
m) be 50W/m
3, heating peak load (Q
m* S);
The calorific value of natural gas: 35.16MJ/Nm
3;
Heating efficiency: 85-95%;
As calculated, the heat producing 1GJ need consume natural gas 31.6Nm
3.
Table 1 lists the calculating parameter of two boiler loads.
The calculating parameter of table 1 boiler load
According to this boiler future time section of the every data provided in table 1 estimate heat supply total amount of heat, time in the past section estimate heat supply total amount of heat and actual in hankering rank high heat, then calculate the boiler load of this confession thermal region according to the method in embodiment one, and regulate the heat supply water temperature of boiler.This heat supply center, adopt s7-1200PLC as centralized control system, active station adopts touch-screen, and this project adopts this algorithm in 2014-2015 heat supply year, saves gas consumption 3.1%, energy-saving and emission-reduction and remarkable in economical benefits than 2013-2014 year.
Embodiment three
Present embodiments provide a kind of regulating system of direct heating gas fired-boiler load parameter, comprising:
Acquiring unit: for obtaining the weather forecast of future time section;
Memory cell: for storing the Weather information of each time period;
Processing unit: estimate heat supply total amount of heat and actual heat supply total amount of heat for calculating in future time section to estimate in heat supply total amount of heat, time in the past section;
Also for estimating heat supply total amount of heat and actual heat supply total amount of heat according to estimating in future time section in heat supply total amount of heat, time in the past section, obtain the boiler load parameter in future time section; The supply water temperature of boiler is regulated according to boiler load parameter.
Wherein more preferably, the regulating system that the present embodiment provides also comprises indoor temperature detector and outdoor temperature detector.Temperature for detecting the room temperature of user, and is sent to processing unit by indoor temperature detector, for determining the index of user indoor temperature.Outdoor temperature detector is used for the temperature outside real-time sensing chamber and temperature data is sent to processing unit.
The invention provides a kind of control method and system of direct heating gas fired-boiler load parameter.The method by according to current period for thermal target estimate heat supply total amount of heat, the previous cycle estimate for thermal target the boiler load parameter that heat supply total amount of heat and actual heat supply total amount of heat obtain current period, and the supply water temperature of boiler is regulated according to boiler load parameter, avoid boiler load parameter to regulate fluctuation excessive according to real-time temperature, economize on resources.Heat supply temperature simultaneously for thermal target can not produce huge fluctuation because of the change of supply water temperature, ensure to have heated quality.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (7)
1. a control method for direct heating gas fired-boiler load parameter, is characterized in that, comprising:
S1: obtain in future time section, in heating system, all confession thermal targets estimates heat supply total amount of heat;
S2: obtain in time in the past section, allly describedly estimates heat supply total amount of heat and actual heat supply total amount of heat for thermal target;
S3: estimate in comprehensive described future time section in heat supply total amount of heat, time in the past section and estimate heat supply total amount of heat and actual heat supply total amount of heat, obtain the boiler load parameter in described future time section;
S4: repeat step S1 to S3, upgrade described boiler load parameter;
Wherein, the duration of described future time section and described time in the past section is identical.
2. control method as claimed in claim 1, is characterized in that, what supply thermal target in described heating system estimates heat supply total amount of heat, calculates according to following formula:
Q
estimate=Q
ms (t
n-t
w)/(t
n1-t
d)
Wherein, Q
estimatefor in described heating system for thermal target estimate heat supply total amount of heat; Q
mthe described architectural design heat load for thermal target place; S is the described heating area for thermal target; t
nfor described for the appointment heating temperature of thermal target; t
w1for the temperature on average of the forecast in the described time period; t
dfor the minimum heating mean temperature required.
3. control method as claimed in claim 1, is characterized in that, for the actual heat supply total amount of heat of thermal target in described heating system, calculates according to following formula:
Q
actual=Q
ms (t
n-t
w)/(t
n2-t
d)
Wherein, Q
actualfor the actual heat supply total amount of heat for thermal target in described heating system; Q
mthe described architectural design heat load for thermal target place; S is the described heating area for thermal target; t
nfor described for the appointment heating temperature of thermal target; t
w2for the temperature on average of the reality in the described time period; t
dfor the minimum heating mean temperature required.
4. control method as claimed in claim 1, it is characterized in that, described step S3 comprises:
Estimate in comprehensive described future time section in heat supply total amount of heat, time in the past section and estimate heat supply total amount of heat and actual heat supply total amount of heat, obtain the boiler load parameter in described future time section according to following formula:
Wherein, Q ' is the boiler load parameter in described future time section; T is the duration in described future time section and in time in the past section; Q
t1 estimatesfor estimating heat supply total amount of heat in described future time section; Q
t2 estimatesfor estimating heat supply total amount of heat in described time in the past section; Q
t2 is actualfor heat supply total amount of heat actual in described time in the past section.
5. control method as claimed in claim 1, is characterized in that, after described step S4, also comprise:
According to described boiler load parameter, PID control method is utilized to regulate the supply water temperature of described boiler.
6. control method as claimed in claim 1, it is characterized in that, the duration of described future time section and described time in the past section is one hour.
7. a regulating system for direct heating gas fired-boiler load parameter, is characterized in that, comprising:
Acquiring unit: for obtaining the weather forecast of future time section;
Memory cell: for storing the Weather information of each time period;
Processing unit: estimate heat supply total amount of heat and actual heat supply total amount of heat for calculating in future time section to estimate in heat supply total amount of heat, time in the past section;
Also for estimating heat supply total amount of heat and actual heat supply total amount of heat according to estimating in future time section in heat supply total amount of heat, time in the past section, obtain the boiler load parameter in described future time section; The supply water temperature of described boiler is regulated according to described boiler load parameter.
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| CN108036399A (en) * | 2017-08-17 | 2018-05-15 | 太原大四方节能环保有限公司 | A kind of dynamic thermal load regulation and control method of more gas fired-boiler heating systems |
| CN112747475A (en) * | 2020-12-31 | 2021-05-04 | 常州工学院 | Boiler control system |
| CN113642788A (en) * | 2021-08-10 | 2021-11-12 | 陕西四季春清洁热源股份有限公司 | Diversified heat source optimization planning method suitable for large-scale medium-deep geothermal region |
| CN117249471A (en) * | 2023-11-20 | 2023-12-19 | 哈尔滨哈东新春锅炉有限公司 | Boiler load adjusting method and system |
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Inventor after: Liu Jiangtao Inventor after: Wang Jianguo Inventor after: Wang Zheng Inventor after: Guo Xu Inventor after: Lu Chao Inventor after: Song Fengze Inventor after: Wang Yue Inventor after: Shi Jinfeng Inventor after: Wang Li Inventor before: Wang Jianguo Inventor before: Wang Zheng Inventor before: Guo Xu Inventor before: Song Fengze Inventor before: Wang Yue Inventor before: Shi Jinfeng Inventor before: Wang Li |
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Effective date of registration: 20170327 Address after: 100035 Beijing City, Xicheng District Xizhimen South Street No. 22 Applicant after: Beijing Gas Group Co., Ltd. Applicant after: BEIJING BEIRAN HEAT SUPPLY CO., LTD. Applicant after: Beijing Gas and Heating Engineering Design Institute Co., Ltd. Applicant after: Beijing Far East Instrument Co., Ltd. Address before: 100035 Beijing City, Xicheng District Xizhimen South Street No. 22 Applicant before: Beijing Gas Group Co., Ltd. Applicant before: BEIJING BEIRAN HEAT SUPPLY CO., LTD. Applicant before: Beijing Far East Instrument Co., Ltd. |
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