CN206903700U - Realize cascaded utilization of energy and participate in the heat supply steam bleeding system of depth peak regulation - Google Patents
Realize cascaded utilization of energy and participate in the heat supply steam bleeding system of depth peak regulation Download PDFInfo
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- CN206903700U CN206903700U CN201720465493.5U CN201720465493U CN206903700U CN 206903700 U CN206903700 U CN 206903700U CN 201720465493 U CN201720465493 U CN 201720465493U CN 206903700 U CN206903700 U CN 206903700U
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Abstract
A kind of heat supply steam bleeding system realized cascaded utilization of energy and participate in depth peak regulation is the utility model is related to, it belongs to cogeneration of heat and power field.The utility model includes steam turbine, generator, backpressure small turbine, pumps for hot water supply net, first-degree heating network, condenser, first heat exchange station, plate type heat exchanger, heat-accumulator tank, storage heat pump, heat release pump, accumulation of heat extraction valve and storage heat release control valve, generator is connected with steam turbine, there is accumulation of heat extraction valve between heat-accumulator tank and extracted steam from turbine, have on heat-accumulator tank and store heat release control valve, there are storage heat pump and heat release pump in heat-accumulator tank lower floor, Steam Turbine Through IP Admission is drawn gas and backpressure small turbine action drives pumps for hot water supply net, backpressure small turbine is connected with first heat exchange station, first heat exchange station communicates with first-degree heating network, first heat exchange station is connected with plate type heat exchanger, plate type heat exchanger is connected with condenser.Tthe utility model system advantages of simple, securely and reliably, operation are flexible, ensure the stability of unit operation and parameter.
Description
Technical field
A kind of heat supply steam bleeding system is the utility model is related to, cascaded utilization of energy is realized more particularly, to one kind and participates in deep
The heat supply steam bleeding system of peak regulation is spent, suitable for large-scale newly-built or heat supply retrofitted unit, it belongs to cogeneration of heat and power field.
Background technology
Issued according to China Electricity Council《2016-2017 years, national power supply and demand situation analysis was observed and predicted in advance
Accuse》, by the end of the year 2016, national generating equipment is reduced by 203 hours using 3785 hours hours, on year-on-year basis.Wherein thermal power generating equipment profit
Reduced by 199 hours with 4165 hours hours, than last year.It is expected that annual national supply of electric power ability in 2017 is totally more than needed, the whole nation
Generating equipment utilizes 3600 hours or so hour, and wherein thermal power generating equipment will settle to 4000 hours or so using hour.In equipment
In the case of hourage continuous decrease, the operation of generating set low level, fired power generating unit depth peak regulation, frequent start-stop.Especially
Thermal power plant unit will also be restricted in Heating Period by dispatching of power netwoks, participate in peak load regulation network, in night unit typically with underrun,
The heating amount of drawing gas is caused to decline, unit heating load deficiency, it is impossible to meet extraneous thermal load demands.From unit performance driving economy and surely
Qualitative consideration, need a kind of hold over system with " peak load shifting " effect badly, while meeting peak load regulation demand, ensure unit
The security and stability of operation.
Be typically in addition the first-degree heating network recirculated water supply water temperature of the urban heating heat supply that steam power plant undertakes for 110 DEG C or
130 DEG C, 70 DEG C of return water temperature, and heat supply initial station is mostly located in power plant region.The heating extraction opening of Large-scale machine set is generally located in
Intermediate pressure cylinder steam drain, intermediate pressure cylinder exhaust steam pressure are 1.1MPa-0.8MPa (row pressure power in the unit of different steam turbine manufactory designs
It is different).To meet the supply water temperature of heat supply network recirculated water, the extraction pressure that thermal power plant unit uses is generally 0.2 MPa-
0.55MPa, directly heat first-degree heating network or after pressure and temperature reducing satisfaction draws gas parameter with intermediate pressure cylinder steam discharge, all exist very big
Energy loss.It is therefore desirable on the basis of maximum heating load is ensured, excavate the energy-saving potentiality of unit, seek a kind of real
The system of existing cascaded utilization of energy.
Publication date is on 04 22nd, 2015, in Publication No. 103452611B Chinese patent, discloses a kind of title
For the patent of invention of " a kind of cogeneration system of combined cycle ".The patent includes steam turbine, waste heat boiler, heat supply network and draws gas and be
System；The blow-off line of high pressure cylinder is provided with a high exhaust check valve, and heat supply network steam bleeding system includes two regulating valves in parallel, wherein the
The first order reducing-and-cooling plant that the adjustment of steam turbine one-level is drawn gas is realized in the connection of one regulating valve, and the second regulating valve passes through a cold reheating
Pipeline connects the pipeline between middle pressure steam generator and middle pressure superheater.Although the system has higher operational efficiency,
In the presence of very big energy loss, therefore still there is drawbacks described above in it.
Therefore it provides a kind of simple system is reasonable, operation is flexible, not only can guarantee that unit participates in depth peak regulation in underload
When operation stability, and ensure the heat supply steam bleeding system of the stability of the heating parameter of first-degree heating network side, it appears particularly must
Will.
Utility model content
The purpose of this utility model is to overcome above shortcomings in the prior art, and provides a kind of simple system and close
Reason, securely and reliably, operation are flexible, not only can guarantee that operation stability of the unit when underload participates in depth peak regulation, Er Qiebao
Demonstrate,prove the heat supply steam bleeding system of the stability of the heating parameter of first-degree heating network side.
The technical scheme in the invention for solving the above technical problem is：This is realized cascaded utilization of energy and participates in depth
The heat supply steam bleeding system of peak regulation, including steam turbine and generator, the generator are connected with steam turbine, it is characterised in that：Also wrap
Include backpressure small turbine, pumps for hot water supply net, first-degree heating network, condenser, first heat exchange station, plate type heat exchanger, heat-accumulator tank, storage heat pump,
Heat release pump, accumulation of heat extraction valve and storage heat release control valve, draw gas between the entrance and extracted steam from turbine of the heat-accumulator tank provided with accumulation of heat
Valve, heat-accumulator tank upper strata, which is connected with, stores heat release control valve, and heat-accumulator tank lower floor is parallel with storage heat pump and heat release pump, the intermediate pressure cylinder of steam turbine
Draw gas and backpressure small turbine action drives pumps for hot water supply net, the port of export of backpressure small turbine and the arrival end phase of first heat exchange station
Even, first heat exchange station communicates with first-degree heating network, and the lower end of first heat exchange station is connected with plate type heat exchanger, plate type heat exchanger and condenser phase
Even.
Preferably, medium is water in heat-accumulator tank described in the utility model, the heat-accumulator tank upper strata is hot water, heat-accumulator tank lower floor
For cold water, heat-accumulator tank centre is transition zone.
Preferably, the drain temperature of first heat exchange station discharge described in the utility model is 80 DEG C or so.
Preferably, 130 DEG C of the supply water temperature of first-degree heating network described in the utility model, 70 DEG C of return water temperature.
The utility model compared with prior art, has advantages below and effect：The system not only can guarantee that unit low
Load participates in operation stability during depth peak regulation, and ensures the stability of the heating parameter of first-degree heating network side；Draw gas in addition
The backpressure small turbine of driving pumps for hot water supply net is set in system, sets plate type heat exchanger to heat main condensate, rationally realizes
The cascade utilization of high-quality heat of drawing gas；The system is simple in construction, and operable flexibility is larger, has certain practical valency
Value.
Brief description of the drawings
Fig. 1 is the system structure diagram of the utility model embodiment.
In figure：Steam turbine 1, generator 2, backpressure small turbine 3, pumps for hot water supply net 4, first-degree heating network 5, condenser 6, heat exchange
At first stop 7, plate type heat exchanger 8, heat-accumulator tank 9, storage heat pump 10, heat release pump 11, accumulation of heat extraction valve 12, heat release control valve 13 is stored, it is main solidifying
Bear water 14.
Embodiment
Below in conjunction with the accompanying drawings and the utility model is described in further detail by embodiment, and following examples are pair
It is of the present utility model explanation and the utility model is not limited to following examples.
Embodiment.
Referring to Fig. 1, the present embodiment realizes cascaded utilization of energy and participates in the heat supply steam bleeding system of depth peak regulation, including steamer
Machine 1, generator, backpressure small turbine 3, pumps for hot water supply net 4, first-degree heating network 5, condenser 6, first heat exchange station 7, plate type heat exchanger 8,
Heat-accumulator tank 9, storage heat pump 10, heat release pump 11, accumulation of heat extraction valve 12 and storage heat release control valve 13.
Generator in the present embodiment is connected with steam turbine 1, and the entrance and steam turbine 1 of heat-accumulator tank 9 are provided between drawing gas to be stored
Hot extraction valve 12, the upper strata of heat-accumulator tank 9, which is connected with, stores heat release control valve 13, and the lower floor of heat-accumulator tank 9 is parallel with storage heat pump 10 and heat release pump
11, the intermediate pressure cylinder of steam turbine 1, which draws gas, is directly entered the acting of backpressure small turbine 3 to drive pumps for hot water supply net 4, after acting, back pressure
The port of export steam discharge of small turbine 3 enters first heat exchange station 7 and heats the recirculated water of first-degree heating network 5, by once exchanging heat from first heat exchange station 7
The hydrophobic of discharge is discharged into plate type heat exchanger 8, the heating main condensate 14 in plate type heat exchanger 8, and condensing is discharged into again after secondary heat exchange
Device 6, realize the cascade utilization of energy.
Medium is water in heat-accumulator tank 9 in the present embodiment, realizes accumulation of heat using the density contrast of cold water and hot water, upper strata is
Hot water, lower floor are cold water, and centre is transition zone.
Heat-accumulator tank 9 in the present embodiment in accumulation of heat, open, storage heat pump 10 by accumulation of heat extraction valve 12, storage heat release control valve 13
Start, cold water is discharged from the lower floor of heat-accumulator tank 9, absorbs heat unnecessary in the recirculated water of first-degree heating network 5, and transition zone moves down.
Heat-accumulator tank 9 in the present embodiment stores heat release control valve 13 and opened in heat release, and heat release pump 11 starts, and hot water is from storage
The hot upper strata of tank 9 discharge, heats the recirculated water of first-degree heating network 5, transition zone moves up.
Storage heat pump 10 and heat release pump 11 in the present embodiment, during accumulation of heat, storage heat pump 10 starts, and heat release pump 11 is stopped transport；Heat release
When, heat release pump 11 starts, and storage heat pump 10 is stopped transport.
Backpressure small turbine 3 in the present embodiment is used for driving pumps for hot water supply net 4, saves part station service, back pressure is small
The steam discharge of steam turbine 3 is directly entered first heat exchange station 7 and heats the recirculated water of first-degree heating network 5.
The drain temperature that first heat exchange station 7 in the present embodiment is discharged is at 80 DEG C or so, for heating low-pressure heater import
Condensate.
130 DEG C of the supply water temperature of the side of first-degree heating network 5 in the present embodiment, 70 DEG C of return water temperature.
The heat supply of the achievable cascaded utilization of energy and participation depth peak regulation of the present embodiment process of drawing gas is as follows：Heat supply is drawn gas
System is drawn gas from the intermediate pressure cylinder steam drain of steam turbine 1, and high-grade steam is done work into backpressure small turbine 3, drives pumps for hot water supply net
4, the steam discharge middle-low grade steam of backpressure small turbine 3 is used for heating the recirculated water of first-degree heating network 5 in first heat exchange station 7.It is first from heat exchange
Stand discharge in 7 it is hydrophobic be directly entered plate type heat exchanger 8, for heating main condensate 14, be discharged into condenser 6 afterwards, realize heat
The cascade utilization of amount.When other daytime, unit load rate was higher, accumulation of heat extraction valve 12 is opened, in the intermediate pressure cylinder steam drain of steam turbine 1
Some vapor enter the upper strata heat hot water of heat-accumulator tank 9 and carry out accumulation of heat, while storage heat pump 10 starts, the cold water of the lower floor of heat-accumulator tank 9
Discharge, hot and cold water intermediate layer move down, and realize accumulation of heat.When unit participates in peak regulation, rate of load condensate is relatively low, the amount of drawing gas deficiency, heat supply
When amount cannot be guaranteed 5 heating parameter of first-degree heating network, heat release pump 11 starts, and hot water flows out from the top of heat-accumulator tank 9, into first heat exchange station
The 7 heating recirculated waters of first-degree heating network 5, ensure the heating parameter of first-degree heating network 5.
Specific implementation process one：When unit load higher than it is specified draw gas load when, the intermediate pressure cylinder of steam turbine 1 draws gas a part
Entered by accumulation of heat extraction valve 12 in heat-accumulator tank 9, another part is directly entered in backpressure small turbine 3 and done work.Into heat-accumulator tank 9
The interior upper strata hot water of heat storage tank 9 that draws gas, while storage heat pump 10 starts, and cold water is discharged from the lower floor of heat-accumulator tank 9, it is first by heat exchange
Stand and 7 absorb the heat that part is unnecessary in the recirculated waters of first-degree heating network 5 and the steam discharge of backpressure small turbine 3, by storing heat release control valve 13
Into in the upper strata hot water of heat-accumulator tank 9, the storage of heat is realized.When unit participation peak regulation, less than specified heating demand, extraction for heat supply
When insufficient, heat release pump 11 starts, and the upper strata hot water of heat-accumulator tank 9 enters heating one-level in first heat exchange station 7 by storing heat release control valve 13
The recirculated water of heat supply network 5, the cold water after heat release are sent into the lower floor's cold water of heat-accumulator tank 9 via heat release pump 11, are realized the release of heat, are ensured
The stability of the side heating parameter of first-degree heating network 5.
Specific implementation process two：The high-quality steam that the intermediate pressure cylinder of steam turbine 1 comes out is directly entered in backpressure small turbine 3
Acting, pumps for hot water supply net 4 is driven, drive the recirculated water of first-degree heating network 5, saved compared with the electric circulating pump in conventional thermal power plant unit
Part station service.Low-grade steam after backpressure small turbine 3 is done work enters the heating recirculated water of first-degree heating network 5 of first heat exchange station 7,
The drain temperature discharged after once exchanging heat from first heat exchange station 7 is at 80 DEG C or so, also in the presence of certain Btu utilization space,
Therefore the hydrophobic plate type heat exchanger 8 that is directly discharged into heats main condensate 14, is discharged into condenser 6 again after secondary heat exchange, realizes heat
Cascade utilization.
By above-mentioned elaboration, those skilled in the art can implement.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, it is named
Title etc. can be different, and the above content described in this specification is only to the utility model structure example explanation.
The equivalence changes or simple change that all construction, feature and the principle described according to the utility model patent design are done, are wrapped
Include in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can be to described
Specific embodiment is made various modifications or supplement or substituted using similar mode, without departing from knot of the present utility model
Structure surmounts scope defined in the claims, all should belong to the scope of protection of the utility model.
Claims (4)
1. a kind of heat supply steam bleeding system realized cascaded utilization of energy and participate in depth peak regulation, including steam turbine and generator, institute
Generator is stated with steam turbine to be connected, it is characterised in that：Also include backpressure small turbine, pumps for hot water supply net, first-degree heating network, condensing
Device, first heat exchange station, plate type heat exchanger, heat-accumulator tank, storage heat pump, heat release pump, accumulation of heat extraction valve and storage heat release control valve, the accumulation of heat
Accumulation of heat extraction valve is provided between the entrance and extracted steam from turbine of tank, heat-accumulator tank upper strata, which is connected with, stores heat release control valve, under heat-accumulator tank
Layer is parallel with storage heat pump and heat release pump, and the intermediate pressure cylinder of steam turbine draws gas and backpressure small turbine action drives pumps for hot water supply net, the back of the body
The port of export of pressure small turbine is connected with the arrival end of first heat exchange station, and first heat exchange station communicates with first-degree heating network, under first heat exchange station
End is connected with plate type heat exchanger, and plate type heat exchanger is connected with condenser.
2. the heat supply steam bleeding system according to claim 1 realized cascaded utilization of energy and participate in depth peak regulation, its feature
It is：Medium is water in the heat-accumulator tank, and the heat-accumulator tank upper strata is hot water, and heat-accumulator tank lower floor is cold water, is among heat-accumulator tank
Cross layer.
3. the heat supply steam bleeding system according to claim 1 realized cascaded utilization of energy and participate in depth peak regulation, its feature
It is：The drain temperature of the first heat exchange station discharge is 80 DEG C or so.
4. the heat supply steam bleeding system according to claim 1 realized cascaded utilization of energy and participate in depth peak regulation, its feature
It is：130 DEG C of the supply water temperature of the first-degree heating network, 70 DEG C of return water temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720465493.5U CN206903700U (en) | 2017-04-28 | 2017-04-28 | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system of depth peak regulation |
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| CN201720465493.5U CN206903700U (en) | 2017-04-28 | 2017-04-28 | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system of depth peak regulation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269331A (en) * | 2017-04-28 | 2017-10-20 | 华电电力科学研究院 | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system and method for depth peak regulation |
| CN108692351A (en) * | 2018-06-22 | 2018-10-23 | 华电国际电力股份有限公司技术服务中心 | High back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system and method |
| CN112049700A (en) * | 2020-07-23 | 2020-12-08 | 华电电力科学研究院有限公司 | Comprehensive energy system utilizing cogeneration of high-parameter heat supply steam complementary energy and control method thereof |
-
2017
- 2017-04-28 CN CN201720465493.5U patent/CN206903700U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269331A (en) * | 2017-04-28 | 2017-10-20 | 华电电力科学研究院 | Realize cascaded utilization of energy and participate in the heat supply steam bleeding system and method for depth peak regulation |
| CN108692351A (en) * | 2018-06-22 | 2018-10-23 | 华电国际电力股份有限公司技术服务中心 | High back pressure circulating water heating and pumping coagulate thermal power plant unit combined optimization system and method |
| CN112049700A (en) * | 2020-07-23 | 2020-12-08 | 华电电力科学研究院有限公司 | Comprehensive energy system utilizing cogeneration of high-parameter heat supply steam complementary energy and control method thereof |
| CN112049700B (en) * | 2020-07-23 | 2021-03-26 | 华电电力科学研究院有限公司 | Comprehensive energy system utilizing cogeneration of high-parameter heat supply steam complementary energy and control method thereof |
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