CN105757758A - Thermal power plant heat network energy saving system and method - Google Patents
Thermal power plant heat network energy saving system and method Download PDFInfo
- Publication number
- CN105757758A CN105757758A CN201610215672.3A CN201610215672A CN105757758A CN 105757758 A CN105757758 A CN 105757758A CN 201610215672 A CN201610215672 A CN 201610215672A CN 105757758 A CN105757758 A CN 105757758A
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- heat
- supply network
- circulation pump
- user
- supply
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Classifications
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- 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
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- 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]
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a thermal power plant heat network energy saving system and method, and belongs to a firepower coal fired power generation heat supply unit. In the prior art, the energy consumption of a thermal network circulation pump is difficult to be obviously reduced. The system comprises a heat source side pipeline, and is characterized by also comprising a heat network heater, a primary heat network circulation water pump frequency converter, a primary heat network circulation water pump, a secondary heat network circulation water pump, a heat user pressure boosting pump, a heat user part temperature instrument and a user side pipeline, wherein the primary heat network circulation water pump is arranged on the heat source side pipeline; the secondary heat network circulation water pump, the heat user pressure boosting pump and the heat user part temperature instrument are arranged on the user side pipeline; the heat source side pipeline and the user side pipeline are connected with the heat network heater. The method provided by the invention comprises the following steps that during the system operation, the water supply temperature is raised; the primary heat network water supply and water return temperature differences are increased; the primary heat network circulation water flow rate is further reduced. The system and the method have the advantages that the energy consumption of the heat network circulation pump can be obviously reduced; the integral efficiency of a thermal power plant unit and the profits of thermoelectric enterprises are improved.
Description
Technical field
The present invention relates to a kind of steam power plant heating net energy saving system and method, belong to firepower coal fired power generation thermal power plant unit.
Background technology
Environment in recent years is seriously polluted, environmental risk is high, and Ecological Loss is big.National requirements, to improve environmental quality for core, accomplishes fluently environmental conservation protracted war and assault of fortified positions, reduces discharging and becomes the most important thing." coal electricity energy-saving and emission-reduction upgrading and transformation action plan " (generate and change the energy 20142093) requires conscientiously to carry out coal electricity reducing energy consumption work, accelerates to promote advanced coal electricity power-saving technology and method.
Owing to energy problem highlights, the energy is the important restriction factor of China's socio-economic development, concerning economic security and national security.Non-renewable energy resources coal, oily technical saving become the important process of China's technological staff.Saving cost of electricity-generating, the investment return reducing energy consumption Ye Shi electricity power enterprise is pursued.
The heat exchangers for district heating by heat exchange station that draws gas of a certain for main steam turbine grade is mainly converted to water at low temperature and heats to resident by Thermal Power Enterprises heating system, heating required drive equipment is to use motor-driven pumps for hot water supply net, the electric energy that pumps for hot water supply net expends during heat supply is not second to the thermal power plant unit of the large-scale subsidiary engine of Yu Yitai such as 300 minister in ancient times's grades, the general power that pumps for hot water supply net consumes is at about 5000kw, calculate with annual 3000 heat supplies hour, one heat supply phase consumes electricity about 15,000,000 degree, if able to reduce this part power consumption, just can bring considerable economic benefit for enterprise.
Although also having some steam power plant's heating net energy saving system and methods now, if publication date is on 04 23rd, 2014, publication number is in the Chinese patent of CN103742964A, discloses a kind of waste heat recovery thermal power plant energy storage and system thereof；And publication date is on October 03rd, 2012, publication number is in the Chinese patent of CN102705020A, discloses a kind of co-generation unit and heat supply method；But such technology existing is all difficult to significantly decrease the energy consumption of pumps for hot water supply net.
Summary of the invention
It is an object of the invention to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, the energy consumption of pumps for hot water supply net can be significantly decreased, improve steam power plant's heating net energy saving system and method for thermoelectricity unit whole efficiency and Thermal Power Enterprises income.
nullThis invention address that the problems referred to above be the technical scheme is that, this steam power plant's heating net energy saving system includes heat source side pipeline，Its construction features is in that: also include heat exchangers for district heating、It is positioned at a circulation pump of heat-supply network converter of heat source side、It is positioned at a circulation pump of heat-supply network of heat source side、It is positioned at the secondary circulation pump of heat-supply network of user side、Heat user booster pump、Heat user place thermometric instrument and user's lateral line，A described circulation pump of heat-supply network had both undertaken the water circulatory function within thermal source，Undertake again heating agent conveying function，This circulation pump of heat-supply network is arranged on heat source side pipeline，A described circulation pump of heat-supply network converter and a circulation pump of heat-supply network connect，Described secondary circulation pump of heat-supply network undertakes the function setting up basic available pressure head at heat user place，Described secondary circulation pump of heat-supply network、Heat user booster pump and heat user place thermometric instrument are installed on user's lateral line，Described heat source side pipeline and user's lateral line are all connected with heat exchangers for district heating.
As preferably, heat user place thermometric instrument as regulating feedback, is used for directly regulating the flow of a circulation pump of heat-supply network by the present invention.Solve the final too high problem causing energy waste of heat user indoor temperature of reality.
As preferably, low profile thermal user's booster pump polishing of the deficiency different model of the available pressure head of distance heat user of the present invention.
As preferably, the model that when lectotype selection of circulation pump of heat-supply network of the present invention selects variable frequency adjustment, pump discharge flow-reduction outlet pressure is not decreased obviously.
A kind of method of described steam power plant's heating net energy saving system, it is characterized in that: the step of described method is as follows: improve supply water temperature when system is run, and strengthens heat supply network confession, a backwater temperature difference, and then reduces a heat supply network circulating water flow；Heat Calculation formula Q=G C (tg-th), when heating system provides identical heat Q to heat user, supply backwater temperature difference Δ t=tg-th and the inversely proportional relation of quantity of circulating water G；When supply backwater temperature difference Δ t brings up to original twice, quantity of circulating water is down to original 1/2nd, and the on-way resistance of pipe network is down to original 1/4th, and the power of secondary circulation pump of heat-supply network is down to original 1/8th.
As preferably, each functions of the equipments of the present invention clearly eliminate conveying power consumption invalid on heat supply network main.
As preferably, heat supply network recirculated water supply water temperature of the present invention 120 DEG C, return water temperature 70 DEG C, one time heat supply network circulating water flow reduces according to the reduction of heat supply phase Various Seasonal entirety heat demand, draws the curve of an overall heat supply network circulating water flow of heat supply phase.
As preferably, when the present invention has 10 heat user or 10 thermal substations when system, heat supply network recirculated water supply water temperature 130 DEG C, return water temperature 70 DEG C, flow 4300t/h, heat supply network drag overall 800kpa under design discharge；The quantity of secondary circulation pump of heat-supply network is 4, the voltage 6kv of secondary circulation pump of heat-supply network, necessary electromotor power 630kw；Outdoor heating calculates lower 12 DEG C of zero temperature, Heating Period 142 days, freeze-up secondary circulation pump of heat-supply network nominal output in the heat supply phase is run, other just cold phase outdoor temperature risings of the cold end of term in the heat supply phase, heat supply network needs transmission heat Q to reduce, and keeps heat supply network to reduce circulating water flow for the constant frequency conversion of backwater designed temperature difference, and the total power consumption of secondary circulation pump of heat-supply network is dropped to 1882212kwh by 3811072kwh, economize on electricity 1928860kwh, power saving rate 50.6%.
The present invention is compared with prior art, have the following advantages and effect: when system is run, improve supply water temperature, strengthen heat supply network confession, a backwater temperature difference, and then reduce a heat supply network circulating water flow, owing to heat supply network circulating water flow and circulation pump of heat-supply network electrical power are cube relations, so power savings is clearly.The system of the present invention is reasonable in design, can significantly decrease the power consumption of circulation pump of heat-supply network, improves thermoelectricity unit whole efficiency and Thermal Power Enterprises income.
Accompanying drawing explanation
Fig. 1 is the structural representation of steam power plant's heating net energy saving system in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and by embodiment, the present invention is described in further detail, and following example are explanation of the invention and the invention is not limited in following example.
Embodiment.
Referring to Fig. 1, the steam power plant's heating net energy saving system in the present embodiment includes heat source side pipeline 7, heat exchangers for district heating 3, is positioned at a circulation pump of heat-supply network converter 1 of heat source side, is positioned at a circulation pump of heat-supply network 2 of heat source side, is positioned at the secondary circulation pump of heat-supply network 4 of user side, heat user booster pump 5, heat user place thermometric instrument 6 and user's lateral line 8.
A circulation pump of heat-supply network 2 in the present embodiment had both undertaken the water circulatory function within thermal source, undertake again heating agent conveying function, this circulation pump of heat-supply network 2 is arranged on heat source side pipeline 7, circulation pump of heat-supply network converter 1 and a circulation pump of heat-supply network 2 connect, secondary circulation pump of heat-supply network 4 undertakes the function setting up basic available pressure head at heat user place, secondary circulation pump of heat-supply network 4, heat user booster pump 5 and heat user place thermometric instrument 6 are installed on user's lateral line 8, and heat source side pipeline 7 and user's lateral line 8 are all connected with heat exchangers for district heating 3.
Using heat user place thermometric instrument 6 as regulating feedback in the present embodiment, for directly regulating the flow of a circulation pump of heat-supply network 2.Low profile thermal user's booster pump polishing of the deficiency different model of the available pressure head of distance heat user.
The step of the steam power plant's heating net energy saving method in the present embodiment is as follows: improve supply water temperature when system is run, and strengthens heat supply network confession, a backwater temperature difference, and then reduces a heat supply network circulating water flow；Heat Calculation formula Q=G C (tg-th), when heating system provides identical heat Q to heat user, supply backwater temperature difference Δ t=tg-th and the inversely proportional relation of quantity of circulating water G；When supply backwater temperature difference Δ t brings up to original twice, quantity of circulating water is down to original 1/2nd, and the on-way resistance of pipe network is down to original 1/4th, and the power of secondary circulation pump of heat-supply network 4 is down to original 1/8th.
Each functions of the equipments clearly eliminate conveying power consumption invalid on heat supply network main.One time heat supply network recirculated water supply water temperature can be 120 DEG C, and return water temperature can be 70 DEG C, and one time heat supply network circulating water flow reduces according to the reduction of heat supply phase Various Seasonal entirety heat demand, draws the curve of an overall heat supply network circulating water flow of heat supply phase.
When having 10 heat user or 10 thermal substations when system, heat supply network recirculated water supply water temperature 130 DEG C, return water temperature 70 DEG C, flow 4300t/h, heat supply network drag overall 800kpa under design discharge；The quantity of secondary circulation pump of heat-supply network 4 is 4, the voltage 6kv of secondary circulation pump of heat-supply network 4, necessary electromotor power 630kw；Outdoor heating calculates lower 12 DEG C of zero temperature, Heating Period 142 days, freeze-up secondary circulation pump of heat-supply network 4 nominal output in the heat supply phase is run, other just cold phase outdoor temperature risings of the cold end of term in the heat supply phase, heat supply network needs transmission heat Q to reduce, and keeps heat supply network to reduce circulating water flow for the constant frequency conversion of backwater designed temperature difference, and the total power consumption of secondary circulation pump of heat-supply network 4 is dropped to 1882212kwh by 3811072kwh, economize on electricity 1928860kwh, power saving rate 50.6%.This system reduces heat supply network mother and manages invalid power consumption, and the design of heat user booster pump 5 and heat supply network feedback circuit reduces system power consumption further.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named title etc. can be different, and the above content described in this specification is only to present configuration example explanation.All equivalences done according to the structure described in inventional idea of the present invention, feature and principle change or simple change, are all included in the protection domain of patent of the present invention.Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by those skilled in the art; without departing from the structure of the present invention or surmount the scope that present claims book is defined, protection scope of the present invention all should be belonged to.
Claims (7)
- null1. steam power plant's heating net energy saving system，Including heat source side pipeline，It is characterized in that: also include heat exchangers for district heating、It is positioned at a circulation pump of heat-supply network converter of heat source side、It is positioned at a circulation pump of heat-supply network of heat source side、It is positioned at the secondary circulation pump of heat-supply network of user side、Heat user booster pump、Heat user place thermometric instrument and user's lateral line，A described circulation pump of heat-supply network had both undertaken the water circulatory function within thermal source，Undertake again heating agent conveying function，This circulation pump of heat-supply network is arranged on heat source side pipeline，A described circulation pump of heat-supply network converter and a circulation pump of heat-supply network connect，Described secondary circulation pump of heat-supply network undertakes the function setting up basic available pressure head at heat user place，Described secondary circulation pump of heat-supply network、Heat user booster pump and heat user place thermometric instrument are installed on user's lateral line，Described heat source side pipeline and user's lateral line are all connected with heat exchangers for district heating.
- 2. steam power plant according to claim 1 heating net energy saving system, it is characterised in that: using heat user place thermometric instrument as regulating feedback, for directly regulating the flow of a circulation pump of heat-supply network.
- 3. steam power plant according to claim 1 heating net energy saving system, it is characterised in that: low profile thermal user's booster pump polishing of the deficiency different model of the available pressure head of distance heat user.
- 4. the method for the steam power plant's heating net energy saving system as described in claims 1 to 3 any claim, it is characterized in that: the step of described method is as follows: when system is run, improve supply water temperature, strengthen heat supply network confession, a backwater temperature difference, and then reduce a heat supply network circulating water flow；Heat Calculation formula Q=G C (tg-th), when heating system provides identical heat Q to heat user, supply backwater temperature difference Δ t=tg-th and the inversely proportional relation of quantity of circulating water G；When supply backwater temperature difference Δ t brings up to original twice, quantity of circulating water is down to original 1/2nd, and the on-way resistance of pipe network is down to original 1/4th, and the power of secondary circulation pump of heat-supply network is down to original 1/8th.
- 5. steam power plant according to claim 4 heating net energy saving method, it is characterised in that: each functions of the equipments clearly eliminate conveying power consumption invalid on heat supply network main.
- 6. steam power plant according to claim 4 heating net energy saving method, it is characterized in that: heat supply network recirculated water supply water temperature 120 DEG C, return water temperature 70 DEG C, one time heat supply network circulating water flow reduces according to the reduction of heat supply phase Various Seasonal entirety heat demand, draws the curve of an overall heat supply network circulating water flow of heat supply phase.
- 7. steam power plant according to claim 4 heating net energy saving method, it is characterized in that: when having 10 heat user or 10 thermal substations when system, heat supply network recirculated water supply water temperature 130 DEG C, return water temperature 70 DEG C, flow 4300t/h, heat supply network drag overall 800kpa under design discharge；The quantity of secondary circulation pump of heat-supply network is 4, the voltage 6kv of secondary circulation pump of heat-supply network, necessary electromotor power 630kw；Outdoor heating calculates lower 12 DEG C of zero temperature, Heating Period 142 days, freeze-up secondary circulation pump of heat-supply network nominal output in the heat supply phase is run, other just cold phase outdoor temperature risings of the cold end of term in the heat supply phase, heat supply network needs transmission heat Q to reduce, and keeps heat supply network to reduce circulating water flow for the constant frequency conversion of backwater designed temperature difference, and the total power consumption of secondary circulation pump of heat-supply network is dropped to 1882212kwh by 3811072kwh, economize on electricity 1928860kwh, power saving rate 50.6%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610215672.3A CN105757758A (en) | 2016-04-08 | 2016-04-08 | Thermal power plant heat network energy saving system and method |
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| CN201610215672.3A CN105757758A (en) | 2016-04-08 | 2016-04-08 | Thermal power plant heat network energy saving system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642271A (en) * | 2016-11-23 | 2017-05-10 | 新疆北方天恒节能科技有限公司 | Branch balance adjustment device for heat supply network and use method of device |
| CN106761992A (en) * | 2017-03-10 | 2017-05-31 | 沈阳枫叶能源科技有限公司 | Heat supply one-level web portal pressure electricity-generating more than needed personal system and progress control method |
| CN113111533A (en) * | 2021-04-25 | 2021-07-13 | 北京百度网讯科技有限公司 | Method and device for determining heating temperature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642271A (en) * | 2016-11-23 | 2017-05-10 | 新疆北方天恒节能科技有限公司 | Branch balance adjustment device for heat supply network and use method of device |
| CN106761992A (en) * | 2017-03-10 | 2017-05-31 | 沈阳枫叶能源科技有限公司 | Heat supply one-level web portal pressure electricity-generating more than needed personal system and progress control method |
| CN106761992B (en) * | 2017-03-10 | 2019-04-02 | 沈阳枫叶能源科技有限公司 | The personal system of heat supply level-one web portal pressure electricity-generating more than needed and progress control method |
| CN113111533A (en) * | 2021-04-25 | 2021-07-13 | 北京百度网讯科技有限公司 | Method and device for determining heating temperature |
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Application publication date: 20160713 |