CN100451460C - Fuel coal and fuel gas united heat supply method - Google Patents
Fuel coal and fuel gas united heat supply method Download PDFInfo
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- CN100451460C CN100451460C CNB2006101146877A CN200610114687A CN100451460C CN 100451460 C CN100451460 C CN 100451460C CN B2006101146877 A CNB2006101146877 A CN B2006101146877A CN 200610114687 A CN200610114687 A CN 200610114687A CN 100451460 C CN100451460 C CN 100451460C
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- 239000003034 coal gas Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000446 fuel Substances 0.000 title claims description 14
- 239000002737 fuel gas Substances 0.000 title claims description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 3
- 239000003245 coal Substances 0.000 description 8
- 239000000567 combustion gas Substances 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/17—District heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The invention relates to a coal-gas combined heating supply method, belonging to HVAC area. The first step of said method is that small peak-shaving boiler with burning gas, as peak-shaving thermal source, running with the parallel of central heat network, is set in each thermal station of civil thermal network with the heat source, which is the boiler in the huge heat supply or coal-burning region. Said secondary backwater is that first heat exchanger obtains quantity of heat generated by the boiler of coal-burning thermal power station or huge coal-burning region and transmitted by the first pipe network, and then it is heated furthermore by small gas-burning peak-shaving boiler so that independent adjusting in time on each heat supply region is accomplished. Thermal resource only bears the basic load of heat supply and the lack of heat is compensated by small gas-burning peak-shaving boiler in each thermal power station. The heat value is changed as the relation of climate and requirement changes. Said first network also bears adjusting action.
Description
Technical field
The present invention relates to a kind of method of fuel coal and fuel gas united heat supply, belong to field of heating ventilation air conditioning.
Background technology
In order to improve efficiency of energy utilization, it is the central heating system of thermal source that a lot of cities are greatly developed with cogeneration of heat and power and large coal-fired boiler.Simultaneously, for environmental protection, city with good conditionsi begins to develop gas heating.But the at present domestic city that has combustion gas and coal-fired two kinds of different energy sources heat supplies simultaneously, its method of operation or be that combustion gas and coal-fired heating system respectively have autonomous system of one's own, compartment, or be that gas fired-boiler is arranged on big heat supply network primary side, as peak adjusting heat source.So just there is following problem:
(1) for there not being the less large-scale centralized heat supply network of peak regulation boiler or peak, just the cold phase operational efficiency in end is low.This section heating period is because heat demand is little, steam power plant's heat capacity surplus, and steam turbine draws gas and changes with fixed attention gas generating into, and energy efficiency obviously descends, under some operating mode even be lower than boiler heat supplying.Simultaneously, heat supply network conveying capacity surplus, matter regulating system pump consumption increases;
(2) for the system of combustion gas and coal-fired independent heat supply, the coal-fired heating system Coal-fired capacity is with Changes in weather, can cause freeze-up to pollute to concentrate discharging, the air environmental pollution fate that exceeds standard to increase;
(3) heat cost height.Reaching under the identical environmental effect, the natural gas quantity that present heat-supplying mode consumes is big, the heat cost height.
(4) heat supply poor stability, in case accident appears in central heat source or backbone network, whole heating system all will be affected.
(5) for the concentrated once heating system of net peak regulation that is arranged on of peak regulation boiler, heat supply network is regulated difficulty.General boiler start/ stop conversion is for large-scale heat supply network, and the waterpower scheduling is difficulty very, simultaneously because thermal inertia is bigger, also is difficult for realizing terminal quick adjustment, and increases the heat supply network conveying energy consumption, even be difficult to realize the operating condition that requires;
(6) for the system of combustion gas and coal-fired independent heat supply, hot user's charge of gas-heating is unfavorable for social equityization far above the hot user of fire coal or cogeneration of heat and power.At present coal-fired and fuel gas cost differs several times, allows the consumer payment of gas-heating improve the cost of atmospheric environment fully, does not meet the social equity principle, is unfavorable for the popularization of " coal changes gas ".
Summary of the invention
The invention provides a kind of method of fuel coal and fuel gas united heat supply.
The method of a kind of fuel coal and fuel gas united heat supply that the present invention proposes, it is characterized in that: described method at first is provided with small gas peak regulation boiler in each thermal substation of the municipal heating systems that is thermal source with large-scale cogeneration of heat and power or large-scale coal-fired district boiler room, as peak adjusting heat source, with central heating heat supply network cooperation; The heat that produces by coal-fired thermal power factory or large-scale coal-fired district boiler room that described secondary net backwater at first obtains by heat exchanger that pipe network transports, and then further heat by small gas peak regulation boiler, reach needed heating load, deliver to each user again; Regulate the heat that adds of gas peak regulation boiler, just can change the heating load of this sub-district, thereby realize independently regulating timely each heat supply sub-district; Described in net side once, cogeneration of heat and power thermal source or large-scale coal-fired district boiler room thermal source are all only born the base load of heating, and the insufficient section of heat is replenished by the small gas peak regulation boiler that is located at each thermal substation, its quantity of heat production becomes with weather and demand relation, bears regulating action.
The purpose that adopts this mode to reach:
(1) heat supply efficiency improves.The cogeneration of heat and power thermal source all is operated in optimum state in whole heating season, and its heat capacity can be given full play to.Compare with current operating mode, same equipment total quantity of heat production in winter can improve about 30%.This part heat mainly relies on fire coal to produce by cogeneration of heat and power mode efficiently, and the major part that is substituted is the heat that combustion gas is directly burnt and produced, and therefore can reduce heat supply energy consumption and cost significantly;
(2) atmospheric environment improves.The fuel coal and fuel gas united heat supply mode changes the part of heating demand by combustion gas at the freeze-up that concentrate to burn coal to be born, make coal be emitted on one heating season homogenising, avoided concentrated discharging at freeze-up, can improve atmospheric environment fate up to standard;
(3) heat cost reduces.Gas fired-boiler is only in the freeze-up additional heat, thereby transition season then mainly reduced gas consumption by coal-fired thermal source, reduced fuel cost.Fig. 2, Fig. 3 are present coal burning and gas burning independent heat supply and when adopting fuel coal and fuel gas united heat supply of whole heating season, heat supply situation when same place capacity and area of heat-supply service, as can be seen, mode is originally established independently gas fired-boiler, winter, average heat production rate was about 50%, and new mode and municipal heating systems cooperation, average heat production rate is 25%-30%.
(4) heating network operation is regulated simply, is easy to realize quick adjustment.Traditional peak regulation boiler is arranged on once net side, thermal inertia is bigger, be difficult for realizing quick adjustment, very difficulty was regulated in operation when peak regulation switched, and adopt thermal substation secondary net side to build small-sized peak regulation gas fired-boiler, and effectively reducing system's thermal inertia, system form is simple, be easy to realize quick adjustment, each heat supply sub-district has no effect each other simultaneously.
(5) increase once net conveying capacity, make existing pipe network bear more heating areas.Because a backbone network is only born the conveying task of the base load of heating, therefore can bear more heating area for existing pipe network.
(6) the heat supply security is improved.Because the dispersion setting of peak adjusting heat source, when central heat source or backbone network break down, but emergency start is arranged on the peak regulation boiler of each thermal substation, guarantees the basic heat supply in this zone.
(7) help social equityization, bear jointly by the whole society and improve the financial burden that air quality causes.Adopt the mode of above-mentioned this fuel coal and fuel gas united heating, make the heating cost, help social equityization, also help the further propelling of " coal changes gas " near consistent.
Description of drawings
Fig. 1 is a fuel coal and fuel gas united heat supply schematic diagram of the present invention.
Fig. 2 is load figure perdurabgility of coal burning and gas burning independent heat supply of the present invention.
Fig. 3 is load figure perdurabgility of fuel coal and fuel gas united heat supply of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
Fig. 1 is the principle schematic of this mode, at first in each thermal substation of the municipal heating systems that is thermal source with large-scale cogeneration of heat and power or large-scale coal-fired district boiler room the small gas boiler is set, as peak adjusting heat source, with central heating heat supply network cooperation.Its basic principle is: the heat that is produced by coal-fired thermal power factory or large-scale coal-fired district boiler room that secondary net side recirculated water at first obtains by heat exchanger that pipe network transports, and then further heat by small gas peak regulation boiler, reach needed heating load, deliver to each user again.Regulate the heat that adds of gas peak regulation boiler, just can change the heating load of this sub-district, thereby realize the independence of each heat supply sub-district is regulated timely.In this manner, in net side once, no matter be cogeneration of heat and power thermal source or large-scale coal-fired district boiler room, whole heating season is only born the heating base load, the insufficient section of heat is replenished by the small gas peak regulation boiler that is located in each thermal substation, its quantity of heat production becomes with weather and demand relation, bears regulating action.
Embodiment:
With reference to Fig. 1, adopt fuel coal and fuel gas united heat supply to be embodied as example with Beijing steam power plant, heating outdoor design temperature-9 ℃, the indoor design temperature is 18 ℃, 80 ℃/60 ℃ of secondary net side design supply and return water temperatures, this moment is when outdoor temperature is-9 ℃, the heat exchanger inlet and outlet temperature difference and peak regulation boiler are imported and exported the temperature difference and are 10 ℃, be that steam power plant and peak regulation boiler are respectively born 50% heat, along with outer temperature rise is arrived-6 ℃, terminal demand heat reduces, but the heat that steam power plant provides is constant, the heat exchanger inlet and outlet temperature difference still is 10 ℃, has just reduced the heating load of peak regulation boiler, and it imports and exports only 7.8 ℃ of the temperature difference.By that analogy, in whole heating season, the heating load of steam power plant remains unchanged substantially, bears 50% of greatest requirements heat, and the adjusting of terminal load is born by the peak regulation boiler, and the duty ratio that steam power plant and peak regulation boiler are born and each out temperature of secondary net recirculated water are as shown in table 1.
Table 1 fuel coal and fuel gas united heat supply operational mode
| Outdoor temperature (℃) | The heat exchanger entrance temperature t 1(℃) | Heat exchanger outlet temperature t 2(℃) | Peak regulation boiler export temperature t 3(℃) | Steam power plant bears the heat ratio | The peak regulation boiler is born the heat ratio |
| -9 | 60 | 70 | 80 | 50％ | 50％ |
| -6 | 55.3 | 65.3 | 73.1 | 56％ | 44％ |
| -3 | 50.7 | 60.7 | 66.2 | 64％ | 36％ |
| 0 | 46.0 | 56.0 | 59.3 | 75％ | 25％ |
| 5 | 38.2 | 47.9 | 47.9 | 100％ | 0％ |
Claims (1)
1, a kind of method of fuel coal and fuel gas united heat supply, it is characterized in that: described method at first is provided with small gas peak regulation boiler in each thermal substation of the urban district heating system that is thermal source with large-scale cogeneration of heat and power or large-scale coal-fired district boiler room, as peak adjusting heat source, with the urban district heating system cooperation; Secondary net side recirculated water at first obtains once the heat from large-scale cogeneration of heat and power or large-scale coal-fired district boiler room generation that net transports by heat exchanger, and then further heat by small gas peak regulation boiler, reach needed heating load, deliver to each user again; Regulate the heat that adds of small gas peak regulation boiler, just can change the heating load of each sub-district, thereby realize independent, adjusting timely each sub-district; In net side once, described large-scale cogeneration of heat and power or large-scale coal-fired district boiler room are all only born the base load of heating, and the insufficient section of heat is replenished by the small gas peak regulation boiler that is located at each thermal substation, its quantity of heat production becomes with weather and demand relation, bears regulating action.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101146877A CN100451460C (en) | 2006-11-21 | 2006-11-21 | Fuel coal and fuel gas united heat supply method |
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| CNB2006101146877A CN100451460C (en) | 2006-11-21 | 2006-11-21 | Fuel coal and fuel gas united heat supply method |
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| Publication Number | Publication Date |
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| CN1952493A CN1952493A (en) | 2007-04-25 |
| CN100451460C true CN100451460C (en) | 2009-01-14 |
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| PL3006682T3 (en) * | 2014-10-07 | 2023-01-30 | Orcan Energy Ag | Device and method for operating a heating distribution station |
| CN106958848A (en) * | 2016-01-10 | 2017-07-18 | 郑晓昱 | Central heating is carried out to city in coal gas mode |
| CN105783076B (en) * | 2016-05-06 | 2021-08-31 | 周悦 | Power plant double-source double-backpressure multi-net waste heat energy heat supply system |
| CN108072088B (en) * | 2016-11-15 | 2024-05-14 | 长春中安鸿程伟业节能科技有限公司 | Peak regulating system of electric heating pump of central heating secondary network |
| CN107621001A (en) * | 2017-09-06 | 2018-01-23 | 同方节能装备有限公司 | A kind of big temperature difference heat-exchange unit of fuel supplementing type low-temperature heat source |
| CN111197785B (en) * | 2019-12-27 | 2021-12-14 | 新疆维吾尔自治区第三机床厂 | Energy-saving heating device and using method |
| CN112577100B (en) * | 2020-11-26 | 2021-12-10 | 清华大学 | Heating compensation method and device and readable storage medium |
| CN112856548A (en) * | 2021-01-18 | 2021-05-28 | 中电惠特热力设计技术服务邯郸有限公司 | Multi-heat-source heat supply system and method |
| CN114151856A (en) * | 2021-12-21 | 2022-03-08 | 新疆伟源节能科技有限公司 | Cogeneration energy-saving control platform |
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2006
- 2006-11-21 CN CNB2006101146877A patent/CN100451460C/en active Active
Patent Citations (7)
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| CN1039085A (en) * | 1988-06-27 | 1990-01-24 | 孟宁生 | Cooling system of thermal power plant |
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Effective date of registration: 20200901 Address after: Cg05-182, building 8, yard 1, Zhongguancun East Road, Haidian District, Beijing 100084 Patentee after: Beijing Qingjian Energy Technology Co., Ltd Address before: 100084 Beijing 100084-82 mailbox Patentee before: TSINGHUA University |
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