CN101571298B - Energy-saving and emission-reducing regulation and control method for urban region boiler room central heating system - Google Patents
Energy-saving and emission-reducing regulation and control method for urban region boiler room central heating system Download PDFInfo
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- CN101571298B CN101571298B CN2009100117391A CN200910011739A CN101571298B CN 101571298 B CN101571298 B CN 101571298B CN 2009100117391 A CN2009100117391 A CN 2009100117391A CN 200910011739 A CN200910011739 A CN 200910011739A CN 101571298 B CN101571298 B CN 101571298B
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Abstract
The invention belongs to the technical field of urban central heating, in particular to an energy-saving and emission-reducing regulation and control method for urban central heating. On the premise that a frequency converter pump is installed first for flow control, the regulation and control method adopts the following technical measures: 1) limiting the fluctuation range of the temperature in aboiler furnace to less than 20 DEG C and ensuring that the temperature of the inlet and outlet water of the boiler is a rated temperature of between 60 and 130 DEG C; 2) adopting 'high flow and small temperature difference' for a pipeline system, wherein in the pipeline at user end, the flow is 1.1 to 1.25 times as much as calculated circulating flow, and the temperature difference is reduced by one fifth to one third; and 3) separately heating according to the functions of buildings, quantitatively predicating the change of heating load, and regulating heating according to an optimal regulating method. The regulation and control method has the advantages of realizing the regulation of the temperature of conventional heat source outlet water, regulating system temperature and flow, effectively improving heating quality and reducing the energy consumption of unit area.
Description
1. technical field
The invention belongs to urban region boiler room central heating technical field, particularly a kind of energy-saving and emission-reducing regulation and control method of urban region boiler room central heating.
2. background technology
At present, the urban area central heating has become main heating system in present China city winter, and the district boiler room heating is the central heating important component part.Yet, cause problems such as heating quality is poor, energy utilization rate is low, environmental pollution because operation and management level is low.
Urban region boiler room heating control method mainly contains thermal source place boiler leaving water temperature and regulates with the boiler intermittent duty and regulate, and mainly be according to the fireman to variations in temperature feel carry out the experience adjusting, when space heating load changes; Simply change the boiler leaving water temperature and regulate through adding coal or few coal, fire box temperature is unstable, and boiler efficiency is low; When intermittently regulating, igniting, the flame-out boiler efficiency that has a strong impact on that boiler is frequent, the pipeline water conservancy is unstable; Imbalance is serious, does not consider building function, heating in unified 24 hours; Waste is serious, and therefore for example nobody time heating as usual of public place, office building has caused very big waste; Especially universities and large-scale enterprises and institutions, its office space ratio is very big and non-relatively office time office hours is short, and vacation is long; The waste degree is bigger, and control lag can't be met consumers' demand.
3. summary of the invention
For solving the deficiency of the present central heating in city; The object of the invention provides a kind of urban region boiler room central heating energy-saving and emission-reducing regulation and control method, utilizes this regulate and control method, takes all factors into consideration from boiler efficiency, pipeline water conservancy, user's building heating three; According to the prediction that outdoor temperature is changed; System temperature, flow are regulated, can effectively be improved heating quality, reduce the unit are energy consumption.
Technical scheme of the present invention is achieved in that
A kind of urban region boiler room central heating system energy-saving and emission-reducing regulation and control method, at first heating system is installed variable frequency pump, so that Flow-rate adjustment, this method is taked following technical measures:
(1) restriction boiler hearth temperature fluctuation range guarantees that less than 20 ℃ boiler Inlet and outlet water temperature 60～130 ℃ of rated temperatures, helps improving boiler thermal output; The variation of heat load is regulated through control boiler water flow, and just the thermal source place adopts " low discharge, the big temperature difference "; " low discharge " was meant in the heating cycle, and when ambient temperature was higher than outdoor calculate temperature, the boiler water flow was less than design discharge; When ambient temperature was lower than outdoor calculate temperature, the boiler water flow was greater than design discharge, and in the whole adjustment process; The temperature difference is the poor of specified leaving water temperature of boiler and specified inflow temperature, remains unchanged;
(2),, adopt " big flow, the little temperature difference " for increasing water conservancy stability to pipe-line system; The user side piping flow is 1.1～1.25 times of computation cycles flow, and the temperature difference of user's heat abstractor two ends recirculated water reduces 1/5th to 1/3rd than its design temperature difference, for direct connected system, through adding water admixing device; This device makes the user side backwater divide two parts, and a part gets into the boiler heating, promptly becomes boiler feed water, and another part heats without boiler; Be referred to as to mix water, mix water and directly mix with the boiler water outlet, the inflow radiator device is when outdoor temperature raises; Increase and mix discharge, when outdoor temperature reduces, reduce and mix discharge, for indirect connecting system; Keep the user side piping flow constant, utilize the adjusting of boiler end quantity of circulating water to change the user side recirculated water temperature difference, regulate heat load;
(3) to building function, the classification heating, office building is with warm; Daytime, heat load strengthened, and evening, heat load reduced, the heating of residential housing; Daytime, heat load reduced, and evening, heat load strengthened, and designed the holding temperature in night of suitable office building; According to the warm load proportion of the usefulness of two types of buildings, holding temperature is set at 5～10 ℃, the overall thermal load tended towards stability in one day.
Adopt the present invention can obtain following beneficial effect:
(1) owing to reduce the boiler hearth temperature fluctuation, boiler efficiency on average can improve one percentage point;
(2) the user side pipeline adopts " big flow, the little temperature difference ", can reduce the water conservancy imbalance effectively, improves heating quality;
The system of (3) classifying and heating to building function has tangible effects of energy saving and emission reduction.
4 description of drawings
Fig. 1 urban region boiler room central heating system energy-saving and emission-reducing regulation and control method direct-coupled type heating sketch map
The indirect interconnection system heating of Fig. 2 urban region boiler room central heating system energy-saving and emission-reducing regulation and control method sketch map
5 specific embodiment
Urban region boiler room central heating energy-saving and emission-reducing regulation and control method of the present invention specifies through embodiment.
Directly connect the adjusting of heating system; With certain unit is example, and this unit heating system has a szL1.6-115/65-AII boiler, a 100kW water circulating pump; Heating area is 20,000 square metres, and wherein the area of dwelling structure is that 0.8 ten thousand square metres, office building area are 1.2 ten thousand square metres.Outdoor calculate temperature is-19 ℃, 16 ℃ of indoor design temperature.The specified coal consumption of boiler is 0.344t/h, and the specified water flow of boiler is 27.56t/h, and office building pipeline discharge is 24.80t/h, and residential housing pipeline discharge is 16.54t/h.
In order effectively to regulate heating, heating system of the present invention adopts with lower device (as shown in Figure 1):
One, the variable frequency pump with a 50kW and two 25kW replaces a 100kW water pump, so that carry out Flow-rate adjustment
Two, according to the building heating characteristics different users is divided into office building and residential housing, is connected respectively on the different pipe networks and regulates separately;
Three, water admixing device is set.
When outdoor temperature changes, the adjusting of being carried out according to the present invention:
The boiler leaving water temperature keeps 115 ℃, and return water temperature keeps 65 ℃.According to weather forecast; Outdoor temperature raises or reduces by 1 ℃, and system shifts to an earlier date certain hour, and experience is confirmed not wait in 10 minutes to 1 hour; Begin to regulate; Reduce or increase boiler coal feeding amount 0.00273kg/s, regulate 3 place's water pumps and reduce or increase quantity of circulating water 0.8t/h, regulating 1 and 2 place's water pumps increases or reduces quantity of circulating water 0.8t/h.
The adjusting of indirect connecting system is an example with Shenyang unit, and this unit heating system has seven szL4.2-130/70-AII boilers; Seven 250kW, four 132 kilowatts, two 160 kilowatts; Two 110 kilowatts of water circulating pumps, heating area is 1,000,000 square metres, wherein the area of dwelling structure is that 650,000 square metres, office building area are 350,000 square metres; Outdoor calculate temperature is-19 ℃, 16 ℃ of indoor design temperature, and specified total coal consumption is 6.32t/h; The specified water outlet total flow of boiler is 421.3t/h, and office building pipeline discharge is 221.19t/h, and residential building pipeline discharge is 410.78t/h.
In order effectively to regulate just heating, the present invention adopts heating system with lower device (as shown in Figure 2):
One, according to the building heating characteristics different users is divided into office building and residential housing, is connected respectively on the different pipe networks and regulates separately;
Two, use variable frequency pump to replace all water pumps, seven 250kW are placed in 2,4 places, settle 1 place for two 110 kilowatts and two 132 kilowatts, settle 3 places for two 160 kilowatts and two 132 kilowatts.
When outdoor temperature changes, the adjusting of being carried out according to the present invention:
The boiler leaving water temperature keeps 130 ℃, and return water temperature keeps 70 ℃.According to weather forecast; Outdoor temperature raises or reduces by 1 ℃, and system shifts to an earlier date certain hour and confirms by rule of thumb not to wait in 10 minutes to 1 hour and begin to regulate, and reduces or the total coal-supplying amount 0.05kg/s of increase boiler; Regulate 2 place's water pumps and reduce or increase quantity of circulating water 7.82t/h; Regulate the water pumps minimizing of 4 places or increase quantity of circulating water 4.772t/h, regulate the water pump minimizing of 1 place or increase quantity of circulating water 11.73t/h, regulate water pumps minimizing of 3 places or increase quantity of circulating water 7.16t/h.
The above-mentioned unit heating system office hours is 8 up to 20 o'clock, and office building pipeline quantity of circulating water is normal discharge during office hours, is 4/5ths of normal discharge in the non-office hours.
Claims (1)
1. urban region boiler room central heating system energy-saving and emission-reducing regulation and control method is characterized in that this method takes following technical measures:
1) restriction boiler hearth temperature fluctuation range guarantees boiler Inlet and outlet water temperature 60～130 ℃ of rated temperatures less than 20 ℃, and the variation of heat load is regulated through control boiler water flow; Just the thermal source place adopts low discharge, the big temperature difference, and low discharge is meant in the heating cycle, when ambient temperature is higher than outdoor calculate temperature; The boiler water flow is less than its design water flow; When ambient temperature was lower than outdoor calculate temperature, the boiler water flow was greater than its design water flow, and in the whole adjustment process; The thermal source place temperature difference is the poor of specified leaving water temperature of boiler and specified inflow temperature, remains unchanged;
2) to pipe-line system, adopt big flow, the little temperature difference, the user side piping flow is 1.1～1.25 times of computation cycles flow, and the temperature difference of user's heat abstractor two ends recirculated water is corresponding to reduce 1/5th to 1/3rd; For direct connected system, through adding water admixing device, this water admixing device makes the user side backwater divide two parts, and a part gets into the boiler heating; Promptly become boiler feed water, another part heats without boiler, is referred to as to mix water, mixes water and directly mixes with the boiler water outlet; Flow into heat abstractor, when ambient temperature raises, increase and mix discharge; When ambient temperature reduces, reduce and mix discharge, for indirect connecting system; When ambient temperature raises or reduce, reduce or increase the boiler end quantity of circulating water, reduce or increase user side pipeline quantity of circulating water simultaneously; Utilize the adjusting of boiler end quantity of circulating water to change the user side recirculated water temperature difference, regulate heat load;
3) to building function, the classification heating, office building is with warm; Daytime, heat load strengthened, and evening, heat load reduced, the heating of residential housing; Daytime, heat load reduced, and evening, heat load strengthened, and both thermic loads are complementary in time; Designing the holding temperature in night of suitable office building, is 5～10 ℃, and the overall thermal load tended towards stability in one day.
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| CN2009100117391A CN101571298B (en) | 2009-05-27 | 2009-05-27 | Energy-saving and emission-reducing regulation and control method for urban region boiler room central heating system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102003736B (en) * | 2010-12-22 | 2012-11-21 | 哈尔滨工业大学 | Heating load stage quality regulation method |
| CN103471175B (en) * | 2013-10-10 | 2014-12-17 | 张久明 | Heat supply energy-saving control system and energy-saving control method |
| CN103471178B (en) * | 2013-10-10 | 2014-12-17 | 张久明 | Heat supply energy-saving control system and energy-saving control method |
| CN104048346A (en) * | 2014-06-06 | 2014-09-17 | 何宗衡 | Heat source flow equilibrium control device and using method thereof |
| CN105757758A (en) * | 2016-04-08 | 2016-07-13 | 华电电力科学研究院 | Thermal power plant heat network energy saving system and method |
| CN106016445A (en) * | 2016-05-24 | 2016-10-12 | 河北惠沧节能科技有限公司 | Automatic adjusting system for central heating circular water heat energy supply amount |
| CN112097315B (en) * | 2020-09-22 | 2021-12-10 | 天津大学 | Time-sharing and zone-dividing complementary intermittent heating method suitable for school district heating system |
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|---|---|---|---|---|
| US5704545A (en) * | 1995-08-31 | 1998-01-06 | Sweitzer, Jr.; Bruce Kenneth | Climate control system |
| CN2727603Y (en) * | 2004-06-22 | 2005-09-21 | 张雷 | Heating energy-saving unit for public buildings |
| CN1773175A (en) * | 2004-11-08 | 2006-05-17 | 何学新 | Energy-saving heat exchanging station or assembling unit and control method thereof |
| CN1858503A (en) * | 2006-06-03 | 2006-11-08 | 宋晓昕 | City central heat supply method |
| CN101344274A (en) * | 2008-08-25 | 2009-01-14 | 北京硕人时代科技有限公司 | Boiler heat supplying climate compensating system and its implementing method |
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- 2009-05-27 CN CN2009100117391A patent/CN101571298B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5704545A (en) * | 1995-08-31 | 1998-01-06 | Sweitzer, Jr.; Bruce Kenneth | Climate control system |
| CN2727603Y (en) * | 2004-06-22 | 2005-09-21 | 张雷 | Heating energy-saving unit for public buildings |
| CN1773175A (en) * | 2004-11-08 | 2006-05-17 | 何学新 | Energy-saving heat exchanging station or assembling unit and control method thereof |
| CN1858503A (en) * | 2006-06-03 | 2006-11-08 | 宋晓昕 | City central heat supply method |
| CN101344274A (en) * | 2008-08-25 | 2009-01-14 | 北京硕人时代科技有限公司 | Boiler heat supplying climate compensating system and its implementing method |
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