CN203476412U - Novel efficient heating supply system based on NCB unit - Google Patents
Novel efficient heating supply system based on NCB unit Download PDFInfo
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- CN203476412U CN203476412U CN201320569712.6U CN201320569712U CN203476412U CN 203476412 U CN203476412 U CN 203476412U CN 201320569712 U CN201320569712 U CN 201320569712U CN 203476412 U CN203476412 U CN 203476412U
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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
- 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]
Abstract
The utility model discloses a novel efficient heating supply system based on an NCB unit. The novel efficient heating supply system comprises an NCB turbine set, a generator, a heat-supply network extraction steam system, a heat-supply network circulating water system and a heat-supply network drainage system. The NCB turbine set is connected with the generator. The heat-supply network extraction steam system comprises a heat-supply network extraction steam pipeline and a heat-supply network heater. The heat-supply network circulating water system comprises a heat-supply network circulating water backwater pipeline, a heat-supply network water filter, a heat-supply network circulating water pump, a heat-supply network circulating water supply pipe, a heat-supply network deaerator, a heat-supply network make-up pump and a heat-supply network make-up water pipeline. The heat-supply network drainage system comprises a condensate pump, a condensate main pipe, a condensate polishing treatment system, a thermodynamic system deaerator, a heat-supply network drainage pipeline and a heat-supply network drainage pump. The novel efficient heating supply system based on the NCB unit has the advantages that the heat-supply network systems are simple, a heat-supply network drainage cooler is not needed, equipment is less, and maintenance workload is less; heat of heat-supply network drainage is utilized effectively, heat loss is reduced, and heat efficiency of the unit is improved.
Description
Technical field:
The utility model relates to a kind of generator set heating system, relates in particular to a kind of new and effective heating system based on NCB unit.
Background technique:
Conventional large-scale unit heating system, generally to adopt 330MW Subcritical Units or the overcritical heat supply unit of 350MW, conventional 300MW level Subcritical Units, employing is drawn gas and is heated heat supply network circulating water, heat supply network circulating water supply and return water temperature is 130/70 ℃, heat supply network drain temperature is 130 ℃, and heat supply network is hydrophobic directly to be sent into oxygen-eliminating device by heat supply network drainage pump and recycle; For conventional 300MW level supercritical unit, raising due to boiler feed water quality, require the hydrophobic boiler of being allowed for access that all needs of all heat supply networks after condensed water precision processing system is processed, and because the serviceability temperature of condensed water precision processing system equipment limits, General Requirements inlet water temperature is no more than 65 ℃, hydrophobic need to consideration cooling of heat supply network of 130 ℃, because hydrophobic flow is larger, generally can only consider to carry out heat exchange cooling by water of condensation; These two kinds of units only draw gas, two kinds of functions of condensing, and heat capacity is relatively less than normal, and unit moves in extraction for heat supply operating mode, unit generation amount is larger, and in electrical network, peak modulation capacity is poor, and steam turbine all has steam discharge loss at all operating conditionss, the thermal efficiency is low, and gross coal consumption rate is high.
NCB unit is a kind of novel overcritical heat supply unit, possess draw gas, condensing, three kinds of functions of back pressure, therefore be called for short NCB, this unit can switch according to the variation of heating demand, while being switched to back pressure operation operating mode, unit is without cold source energy, unit efficiency is high.When back pressure operating mode is moved, condensate system does not have water of condensation, and heat supply network is hydrophobic does not have cooling medium, cannot realize cooling, adopts water of condensation infeasible as the hydrophobic cooling medium scheme of heat supply network.
Model utility content:
The purpose of this utility model is to provide a kind of hydrophobic heat of heat supply network that effectively utilizes, and reduces thermal loss, improves a kind of new and effective heating system based on NCB unit of generatine set heat efficiency.
The utility model is implemented by following technological scheme: a kind of new and effective heating system based on NCB unit, it comprises NCB steam turbine set and generator, described NCB steam turbine set is connected with described generator, it also comprises heat supply network steam bleeding system, heat supply network circulation, heat supply network draining system, described heat supply network steam bleeding system comprises heat supply network extraction line, heat exchangers for district heating, and described heat exchangers for district heating steam inlet is connected with the intermediate pressure cylinder of described NCB steam turbine set by described heat supply network extraction line, described heat supply network circulation comprises heat supply network circulating water water return pipeline, heat supply network water filter, circulation pump of heat-supply network, heat supply network circulating water water pipe, heat supply network oxygen-eliminating device, heat supply network small pump and heat supply network condensate make-up piping, described heat exchangers for district heating circulating water inlet is connected with described heat supply network circulating water water return pipeline, on described heat supply network circulating water water return pipeline, be provided with described heat supply network water filter and described circulation pump of heat-supply network, described heat exchangers for district heating circulating water outlet pipe is connected with described heat supply network circulating water water supply line, described heat supply network oxygen-eliminating device steam inlet is connected with described intermediate pressure cylinder by described heat supply network extraction line, described heat supply network oxygen-eliminating device water intake is connected with described heat supply network condensate make-up piping, described heat supply network oxygen-eliminating device water outlet is connected with the described heat supply network circulating water water return pipeline between described heat supply network water filter and described circulation pump of heat-supply network, on described heat supply network oxygen-eliminating device water outlet, be provided with described heat supply network small pump, described heat supply network draining system comprises condensate pump, the jellyfish pipe that condenses, condensed water precision processing system, thermodynamic system oxygen-eliminating device, heat supply network drain water piping and heat supply network drainage pump, described water of condensation delivery side of pump is connected with described condensed water precision processing system by the described jellyfish pipe that condenses, described condensed water precision processing system is connected by described condensing water conduit with described thermodynamic system oxygen-eliminating device, the described jellyfish pipe that condenses is connected by described heat supply network drain water piping with described heat exchangers for district heating drain port, is provided with described heat supply network drainage pump on described heat supply network drain water piping.
Described heat supply network extraction line is connected with the intermediate pressure cylinder of more than one described NCB steam turbine set.
The described heat supply network extraction line being connected with the intermediate pressure cylinder of NCB steam turbine set described in each is provided with safety valve, safety check and the quick closing valve modulating valve that draws gas.
Advantage of the present utility model: heat network system is simple, without heat supply network drain cooler, equipment is few, repair and maintenance workload is little; Effectively utilize the hydrophobic heat of heat supply network, reduce thermal loss, improve generatine set heat efficiency; When heating demand is larger, unit can be switched to the operation of back pressure operating mode, in nothing, condenses in water-cooled situation, do not need to arrange separately new cooling water system, guaranteed NCB unit under the amount of drawing gas greatly truly without cold source energy, energy saving, raise the efficiency; Adopt the maximum heat capacity of heating system of NCB unit heat supply can improve 15%, the thermal efficiency is high, gross coal consumption rate reduces 4g/kWh, during the heat supply of back pressure operating mode, unit generation amount is less, and in electrical network, peak modulation capacity is good, unit does not have steam discharge loss, the thermal efficiency is high, and gross coal consumption rate is low, more energy-conservation than the large-scale heat supply unit of routine; Adapt to the service condition of NCB unit under different operating modes, power plant's flexible operation, unit is the heating phase in the winter time, and along with the amount of drawing gas increases, unit switches to the operation of back pressure operating mode, and unit heating load is large, and generated energy is few, and the peak modulation capacity of unit in electrical network is better.
Accompanying drawing explanation:
Fig. 1 is system connection diagram of the present utility model.
NCB steam turbine set 1, generator 2, heat supply network extraction line 3, heat exchangers for district heating 4, heat supply network circulating water water return pipeline 5, heat supply network water filter 6, circulation pump of heat-supply network 7, heat supply network circulating water water pipe 8, heat supply network oxygen-eliminating device 9, heat supply network small pump 10, heat supply network condensate make-up piping 11, condensate pump 12, jellyfish pipe 13 condenses, condensed water precision processing system 14, thermodynamic system oxygen-eliminating device 15, drain water piping 16 condenses, heat supply network drainage pump 17, intermediate pressure cylinder 18, low pressure (LP) cylinder 19, connecting tube separating valve 20, mesolow cylinder connecting tube 21, butterfly valve 22, 3S clutch 23, high-pressure cylinder 24, safety valve 25, safety check 26, quick closing valve modulating valve 27 draws gas, heat supply network drain water piping 28.
Embodiment: as shown in Figure 1, a kind of new and effective heating system based on NCB unit, it comprises NCB steam turbine set 1, generator 2, heat supply network steam bleeding system, heat supply network circulation, heat supply network draining system, NCB steam turbine set 1 is connected with generator 2, described heat supply network steam bleeding system comprises that heat supply network extraction line 3, heat exchangers for district heating 4, heat supply network extraction line 3 are connected with the intermediate pressure cylinder 18 of two NCB steam turbine set 1, the heat supply network extraction line 3 being connected with the intermediate pressure cylinder 18 of each NCB steam turbine set 1 is provided with safety valve 25, for the protection of cylinder, safety check 26 is set simultaneously and the quick closing valve modulating valve 27 that draws gas, heat exchangers for district heating 4 steam inlets are connected with the intermediate pressure cylinder 18 of NCB steam turbine set 1 by heat supply network extraction line 3, described heat supply network circulation comprises heat supply network circulating water water return pipeline 5, heat supply network water filter 6, circulation pump of heat-supply network 7, heat supply network circulating water water pipe 8, heat supply network oxygen-eliminating device 9, heat supply network small pump 10 and heat supply network condensate make-up piping 11, heat exchangers for district heating 4 circulating water inlets are connected with heat supply network circulating water water return pipeline 5, on heat supply network circulating water water return pipeline 5, be provided with heat supply network water filter 6 and circulation pump of heat-supply network 7, heat exchangers for district heating 4 circulating water outlet pipes are connected with heat supply network circulating water water pipe 8 roads, heat supply network oxygen-eliminating device 9 steam inlets are connected with intermediate pressure cylinder 18 by heat supply network extraction line 3, heat supply network oxygen-eliminating device 9 water intakes are connected with heat supply network condensate make-up piping 11, heat supply network oxygen-eliminating device 9 water outlets are connected with the heat supply network circulating water water return pipeline 5 between heat supply network water filter 6 and circulation pump of heat-supply network 7, on heat supply network oxygen-eliminating device 9 water outlets, be provided with heat supply network small pump 10, described heat supply network draining system comprises condensate pump 12, the jellyfish pipe 13 that condenses, condensed water precision processing system 14, thermodynamic system oxygen-eliminating device 15, heat supply network drain water piping 16 and heat supply network drainage pump 17, the outlet of condensate pump 12 is connected with condensed water precision processing system 14 by the jellyfish pipe 13 that condenses, condensed water precision processing system 14 is connected by condensing water conduit 16 with thermodynamic system oxygen-eliminating device 15, the jellyfish pipe 13 that condenses is connected by heat supply network drain water piping 28 with heat exchangers for district heating 4 drain ports, is provided with heat supply network drainage pump 17 on heat supply network drain water piping 28.
Job description: heat supply network steam bleeding system, when the amount of drawing gas is less, NCB unit 1 is according to taking out solidifying operating mode operation, the intermediate pressure cylinder 18 of NCB unit 1 and the connecting tube separating valve between low pressure (LP) cylinder 19 20 are opened, by changing the aperture of mesolow butterfly valve 22 on cylinder connecting tube 21, the control amount of drawing gas, low pressure (LP) cylinder 19 is connected with high-pressure cylinder 24, intermediate pressure cylinder 18 by coupling.When the amount of drawing gas is larger, NCB unit 1 switches to the operation of back pressure operating mode, connecting tube separating valve between intermediate pressure cylinder 18 and low pressure (LP) cylinder 19 20 cuts out, utilize 3S clutch 23 that low pressure (LP) cylinder 19 and high-pressure cylinder 24, intermediate pressure cylinder 18 are departed from, high-pressure cylinder 24, intermediate pressure cylinder 18 are directly as large-scale back pressure unit operation, intermediate pressure cylinder 18 steam discharges are directly delivered to heat exchangers for district heating 4 heating heat supply network circulating waters, simultaneously also for heat supply network oxygen-eliminating device 9 provides heating steam.
Heat supply network circulating water return water temperature in heat supply network circulating water water return pipeline 5 is 55 ℃, through heat supply network water filter 6, filter, remove the large granular impurity in circulating water, then after circulation pump of heat-supply network 7 boosts, delivering to heat exchangers for district heating 4 is drawn gas after being heated to 130 ℃ and delivers to heating power outer net by heat supply network circulating water water pipe 8 by heating, for each secondary heat exchange station of heating power outer net provides thermal source, heat is delivered to user.A small amount of heat supply network supplementing water, after 9 deoxygenations of heat supply network oxygen-eliminating device, enters heat supply network circulating water water return pipeline 5, the heat supply network circulating water that in supplemental heat network operation loses after being boosted by heat supply network small pump 10.During breakdown accident of heat-supply network, water loss is more, and heat supply network supplementing water can be supplemented by industry water by heat supply network condensate make-up piping 11.
NCB unit 1 is when switching to the operation of back pressure operating mode, heat regenerative system is without water of condensation, the Btu utilization difficulty that heat supply network is hydrophobic, for reducing the thermal loss for thermoelectricity plant, improve plant thermal efficiency, in conjunction with design and the practical operation situation of heat supply network circulating water pipe network, heat supply network circulating water supplies backwater design temperature according to 130/55 ℃.Heating is drawn gas, and in heat exchangers for district heating 4, by 55 ℃ of heat supply network circulating water backwater, to be cooled to 60 ℃ of heat supply networks hydrophobic, then condensate pump 12 outlet of delivering to condensate system by heat supply network drainage pump 17 is condensed on jellyfish pipe 13, delivers to thermodynamic system oxygen-eliminating device 15 and recycle after then processing by condensed water precision processing system 14.
NCB unit: NCB unit draws gas as having a kind of novel overcritical heat supply unit, possessing, condensing, three kinds of functions of back pressure, can switch according to the variation of heating demand, and while being switched to back pressure operation operating mode, unit is without cold source energy, and unit efficiency is high.
Draw gas: the steam that part had been done to merit is extracted out from steam turbine, be used for heat-setting water, feedwater, civil heating etc., these steam of releasing from steam turbine are drawing gas.
Condensing: refer to that steam expands after acting in steam turbine, enter the cooling water of condensation that becomes in vapour condenser, enter steam cooling in vapour condenser condensing.
Back pressure: refer to that steam expands after acting in steam turbine, discharge steam turbine with certain pressure, deliver to heating or industrial heat user, steam turbine is not established vapour condenser, there is no cold source energy, and unit efficiency is high, and this steam acting, exhaust mode are back pressure.
Any modification of making, be equal to replacement, improvement etc., within also protection scope of the present invention all should being included within design philosophy of the present invention and principle.
Claims (3)
1. the new and effective heating system based on NCB unit, it comprises NCB steam turbine set and generator, described NCB steam turbine set is connected with described generator, it is characterized in that, it also comprises heat supply network steam bleeding system, heat supply network circulation, heat supply network draining system, described heat supply network steam bleeding system comprises heat supply network extraction line, heat exchangers for district heating, and described heat exchangers for district heating steam inlet is connected with the intermediate pressure cylinder of described NCB steam turbine set by described heat supply network extraction line, described heat supply network circulation comprises heat supply network circulating water water return pipeline, heat supply network water filter, circulation pump of heat-supply network, heat supply network circulating water water pipe, heat supply network oxygen-eliminating device, heat supply network small pump and heat supply network condensate make-up piping, described heat exchangers for district heating circulating water inlet is connected with described heat supply network circulating water water return pipeline, on described heat supply network circulating water water return pipeline, be provided with described heat supply network water filter and described circulation pump of heat-supply network, described heat exchangers for district heating circulating water outlet pipe is connected with described heat supply network circulating water water supply line, described heat supply network oxygen-eliminating device steam inlet is connected with described intermediate pressure cylinder by described heat supply network extraction line, described heat supply network oxygen-eliminating device water intake is connected with described heat supply network condensate make-up piping, described heat supply network oxygen-eliminating device water outlet is connected with the described heat supply network circulating water water return pipeline between described heat supply network water filter and described circulation pump of heat-supply network, on described heat supply network oxygen-eliminating device water outlet, be provided with described heat supply network small pump, described heat supply network draining system comprises condensate pump, the jellyfish pipe that condenses, condensed water precision processing system, thermodynamic system oxygen-eliminating device, heat supply network drain water piping and heat supply network drainage pump, described water of condensation delivery side of pump is connected with described condensed water precision processing system by the described jellyfish pipe that condenses, described condensed water precision processing system is connected by described condensing water conduit with described thermodynamic system oxygen-eliminating device, the described jellyfish pipe that condenses is connected by described heat supply network drain water piping with described heat exchangers for district heating drain port, is provided with described heat supply network drainage pump on described heat supply network drain water piping.
2. a kind of new and effective heating system based on NCB unit according to claim 1, is characterized in that, described heat supply network extraction line is connected with the intermediate pressure cylinder of more than one described NCB steam turbine set.
3. a kind of new and effective heating system based on NCB unit according to claim 2, is characterized in that, the described heat supply network extraction line being connected with the intermediate pressure cylinder of NCB steam turbine set described in each is provided with safety valve, safety check and the quick closing valve modulating valve that draws gas.
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| CN201320569712.6U CN203476412U (en) | 2013-09-14 | 2013-09-14 | Novel efficient heating supply system based on NCB unit |
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| CN201320569712.6U CN203476412U (en) | 2013-09-14 | 2013-09-14 | Novel efficient heating supply system based on NCB unit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108150235A (en) * | 2017-12-21 | 2018-06-12 | 天津国电津能热电有限公司 | A kind of denitration fibre selection device based on the adjustment of condensing turbine group |
| CN108506057A (en) * | 2018-03-01 | 2018-09-07 | 华电电力科学研究院有限公司 | A kind of co-generation unit and adjusting method for cutting off low pressure (LP) cylinder into vapour |
| CN110986022A (en) * | 2019-11-01 | 2020-04-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Steam extraction heating heat supply drainage system |
| CN111322126A (en) * | 2019-12-06 | 2020-06-23 | 华北电力科学研究院有限责任公司 | Control method, device and system for circulating water pump of heat supply network heater |
| CN111779964A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Subcritical unit improved heat supply network drainage system and working method thereof |
| CN111878797A (en) * | 2020-07-10 | 2020-11-03 | 西安热工研究院有限公司 | System and method for utilizing circulating water of pure condensing unit for water supplement of deaerator of back pressure machine |
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2013
- 2013-09-14 CN CN201320569712.6U patent/CN203476412U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108150235A (en) * | 2017-12-21 | 2018-06-12 | 天津国电津能热电有限公司 | A kind of denitration fibre selection device based on the adjustment of condensing turbine group |
| CN108506057A (en) * | 2018-03-01 | 2018-09-07 | 华电电力科学研究院有限公司 | A kind of co-generation unit and adjusting method for cutting off low pressure (LP) cylinder into vapour |
| CN110986022A (en) * | 2019-11-01 | 2020-04-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Steam extraction heating heat supply drainage system |
| CN111322126A (en) * | 2019-12-06 | 2020-06-23 | 华北电力科学研究院有限责任公司 | Control method, device and system for circulating water pump of heat supply network heater |
| CN111779964A (en) * | 2020-05-18 | 2020-10-16 | 华电电力科学研究院有限公司 | Subcritical unit improved heat supply network drainage system and working method thereof |
| CN111779964B (en) * | 2020-05-18 | 2023-03-21 | 华电电力科学研究院有限公司 | Subcritical unit improved heat supply network drainage system and working method thereof |
| CN111878797A (en) * | 2020-07-10 | 2020-11-03 | 西安热工研究院有限公司 | System and method for utilizing circulating water of pure condensing unit for water supplement of deaerator of back pressure machine |
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