CN207715198U - A kind of condensing turbine group based on sorption type heat pump - Google Patents
A kind of condensing turbine group based on sorption type heat pump Download PDFInfo
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- CN207715198U CN207715198U CN201721807753.9U CN201721807753U CN207715198U CN 207715198 U CN207715198 U CN 207715198U CN 201721807753 U CN201721807753 U CN 201721807753U CN 207715198 U CN207715198 U CN 207715198U
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Abstract
The utility model provides a kind of condensing turbine group based on sorption type heat pump.Condensing turbine group based on sorption type heat pump is not transformed host, does not reduce the maximum output of host.LCV valves are turned down during power grid is adjusted deeply, are adjusted to the driving steam flow of absorption heat pump.By controlling low pressure (LP) cylinder into steam flow amount, the safe steam flow of low pressure (LP) cylinder is kept, low pressure (LP) cylinder exhausted spare heat is recycled by hot pump in low temp residual neat recovering system, intermediate pressure cylinder steam discharge is completely used for heat supply in the case where not cutting off low pressure (LP) cylinder.Control LCV valve openings match with unit load, by the matching to steam turbine high intermediate pressure cylinder and low pressure (LP) cylinder throttle flow, have not only met low pressure (LP) cylinder rotor security, but also meet heat supply steam extraction needs.Absorption type low-temperature heat pump waste heat recovery system is utilized simultaneously, and Turbine Cold Junction exhaust heat is all recycled, heating system is used for.
Description
Technical field
The utility model is related to Large-scale fire-electricity unit heat supply process fields, and sorption type heat pump is based in particular to one kind
Condensing turbine group.
Background technology
Currently, domestic electrical demand growth is slow, and power surplus contradiction is increasingly prominent, with clean energy resource wind power technology,
The fast development of hydropower technology, photovoltaic technology should pay the utmost attention to clean energy resource generation technology during power scheduling.But
Some areas abandon wind, abandon water, abandon optical issue and be on the rise since power grid can not dissolve in full amount, oneself influences China through becoming long-term
The principal contradiction that clean energy resource develops in a healthy way.
Current thermoelectricity decoupling technology：
1. low pressure (LP) cylinder optical axis scheme：The high intermediate pressure cylinder of pure condensate unit is changed to back pressure machine, low pressure (LP) cylinder rotor essentially becomes connection
Axis device.
Advantage：Requirement of the depth peak regulation with heat supply can be met in power generation underload lower band heat supply.
Disadvantage：Unit output declines, and maximum electric load is down to 230MW after example 300MW units change optical axis.Power grid has electric load
It is required that when cannot timely respond to.
2. turbine low pressure cylinder rotor shortens blade, improves exhaust pressure and condenser is changed to heat exchangers for district heating, externally supply
Tropical heat supply network load.
Advantage：It can underload band heat supply in winter
Disadvantage：Unit output declines, and condenser retrofit is big, film-cooled heat reduces, and can not overfill power for hot season band non-.Heat
Net is complicated with circulation switching system, and partition difficulty is big.
3. turbine low pressure cylinder is connect with intermediate pressure cylinder rotor using 3S shaft couplings, off-the-line low pressure (LP) cylinder when Winter heat supply uses
Middle pressure vapour heat supply.
Advantage：It can underload band heat supply in winter
Disadvantage：It can only be installed in new-built unit, cannot be transformed in old unit, not have and be widely applied.
4. other technologies：Hot water storage tank, fused salt storage tank, main reheated steam auxiliary heat supplying, four sections of transformations of steam extraction steam, grill pans
Stove, electric heating pump.
Existing various schemes are to reduce unit output by cutting off low pressure (LP) cylinder, to realize power grid depth peak regulation (underload)
Purpose, but when load is turned up in power grid, because low pressure (LP) cylinder has been cut off, former design rating is not achieved.Profound cause is thermal power plant unit
During responsive electricity grid is adjusted deeply, the requirement of thermic load is met under underload will increase heat supply steam extraction amount, at this moment low pressure (LP) cylinder
Decline into steam flow amount, because cooling flow is small action of blast occurs for non-grade blade, and low pressure (LP) cylinder is in dangerous working condition.But in power grid tune
High load capacity operating mode, because displacement is big, heat supply steam extraction amount is big, and heat supply temperature is higher than heat supply network scheduling requirement, this operating mode at the beginning of the heat supply not
Phase is especially apparent.Thermoelectricity decoupling only solves underload thermoelectricity contradiction, cannot solve thermoelectricity contradiction under high load capacity operating mode.
It follows that any of the above decoupling scheme is to sacrifice unit output and economy as cost, investment for trnasforming urban land is big, is supplying
Hot just non-phase adjustment difficulty is big.Although increasing flexibility, energy consumption increases simultaneously.Current energy-saving, emission-reducing, environment friendly requirement is not met.
It is current need one kind can responsive electricity grid depth peak regulation can meet heat demand again, also to reach the technology of energy-saving and emission-reduction requirement.
Utility model content
In view of this, the technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, one kind is provided
Condensing turbine group based on sorption type heat pump, including the boiler, high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder and the generator that are sequentially connected in series；
Medium pressure cylinder is connected with hot pump in low temp residual neat recovering system；
The low pressure (LP) cylinder is connected with the waste-heat recovery device being connected to the hot pump in low temp residual neat recovering system；
The steam discharge of medium pressure cylinder is used to be the hot pump in low temp residual neat recovering system heat supply；
The waste-heat recovery device is used to recycle the waste heat of the low pressure (LP) cylinder discharge, and the waste heat is supplied the Low Temperature Thermal
Pump residual neat recovering system；
LCV valves are equipped between medium pressure cylinder and the low pressure (LP) cylinder.
In some embodiments, the hot pump in low temp residual neat recovering system includes heat pump and heat exchangers for district heating；
The heat pump and the heat exchangers for district heating are interconnected by heat supply network recirculated water.
In some embodiments, the waste-heat recovery device includes condenser and water tower；
The condenser is connected to the water tower by remaining hot water.
In some embodiments, the remaining hot water derived from the condenser is back to the water through the heat pump
Tower；
The remaining hot water heats the heat pump cycle water.
In some embodiments, the waste-heat recovery device further includes for driving the remaining hot water flowing water to pump.
In some embodiments, the water pump is set between the condenser and the water tower.
In some embodiments, EV valves are equipped between medium pressure cylinder and the hot pump in low temp residual neat recovering system.
In some embodiments, further include control device；
The LCV valves are connect with the control device.
In some embodiments, the EV valves are connect with the control device.
In some embodiments, further include the first temperature-detecting device being connect with the control device；
First temperature-detecting device is set in the heat supply network recirculated water；
First temperature-detecting device prestores the first temperature threshold；
When the temperature that first temperature-detecting device detects is less than first temperature threshold, the control device
Control the LCV valves reduce the low pressure (LP) cylinder into steam flow amount.
A kind of condensing turbine group based on sorption type heat pump provided by the utility model in terms of existing technologies, has
Beneficial effect is：Condensing turbine group based on sorption type heat pump is not transformed host, does not reduce the maximum output of host.
Power grid turns down LCV valves during adjusting deeply, adjusts to the driving steam flow of absorption heat pump.By controlling low pressure (LP) cylinder into steam flow
Amount keeps the safe steam flow of low pressure (LP) cylinder, recycles low pressure (LP) cylinder exhausted spare heat by hot pump in low temp residual neat recovering system, do not cutting
Intermediate pressure cylinder steam discharge is completely used for heat supply in the case of except low pressure (LP) cylinder.Control LCV valve openings match with unit load, by right
The matching of steam turbine high intermediate pressure cylinder and low pressure (LP) cylinder throttle flow had not only met low pressure (LP) cylinder rotor security, but also met heat supply steam extraction needs.
Absorption heat pump is utilized simultaneously, and Turbine Cold Junction exhaust heat is all recycled, heating system is used for.
The device provides a kind of hot pump in low temp heat recovery technologies.Preferably, host is recycled using lithium bromide heat pump
Heat in water extracts, and heats heat supply network recirculated water.Extraction heat reaches 1.7 than (COP values), i.e., in extraction low-temperature heat source thermal energy
During input 10 units energy, from the waste heat of recirculated water extract 7 units energy.
It is understood that recyclable 11500 ton hour of host remaining hot water of hot pump in low temp residual neat recovering system, heating
10800 ton hour heat supply network recirculated waters, remaining hot water temperature drop reach 9~10 DEG C, corresponding promotion heat supply network 9~10 DEG C of Wen Sheng of recirculated water, day
Recovery waste heat 10000GJ.Turbine exhaust is extracted to the waste heat of air, reduces the hot driving to environment, in responsive electricity grid depth
Ensure heating demand while spending peak regulation, unit is realized under the premise of warm season can meet thermic load, by the electric load of unit
It minimizes.Alleviate the thermoelectricity contradiction in northern area heat supply period, increases flexibility and the elasticity of dispatching of power netwoks, suitable for pushing greatly
Extensively.
It is understood that technique can reduce unit electric load, fully dig in the case where meeting heat demand
The peak regulation potential of pick release network system.Within a very long time in future, thermal power plant's depth peak regulation disappearing as clean energy resource
It receives technology, will be a scarce resource, the new profit growth point of thermal power plant certainly will be become.
In short, condensing turbine group of this kind based on sorption type heat pump provides a kind of new control method, the device and
Method is easy to use, and structural stability is good, easily operated.The convenience for greatly improving operation, reduce the maintenance in later stage at
This.More meet the demand in actual application.
In conclusion structure and the operation of a kind of condensing turbine group based on sorption type heat pump provided by the utility model
It has the advantages that above-mentioned many and value to method, and there are no in similar product similar method publish or use and
Really belong to innovation, produce handy and practical effect, more existing technology has effects that the multinomial of enhancement, real to more be suitable for
With, and there is extensive industrial value.
Description of the drawings
It should be understood that the following drawings illustrates only some embodiments of the utility model, therefore it is not construed as
Restriction to range for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other relevant attached drawings.
Fig. 1 shows for a kind of structure of the condensing turbine group based on sorption type heat pump disclosed in the utility model embodiment
It is intended to；
Fig. 2 is a kind of circuit of the condensing turbine group based on sorption type heat pump disclosed in the utility model embodiment
Figure；
Fig. 3 is the result that thermoelectricity decouples the experiment of power grid depth peak regulation heat supply process disclosed in the utility model embodiment.
Reference numeral：
Specific implementation mode
Hereinafter, the various embodiments of the disclosure will be described more fully in conjunction with attached drawing.The disclosure can have various realities
Example is applied, and can adjust and change wherein.Therefore, it will in more detail be retouched with reference to the specific embodiment being shown in the accompanying drawings
State the disclosure.It should be understood, however, that：There is no the meanings that the various embodiments of the disclosure are limited to specific embodiment disclosed herein
Figure, but the disclosure should be interpreted as covering all adjustment in the spirit and scope for the various embodiments for falling into the disclosure, etc.
Jljl and/or alternative.Description taken together with the accompanying drawings, the same element of same reference numerals.
Hereinafter, disclosed in the term " comprising " that can be used in the various embodiments of the disclosure or " may include " instruction
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.
In the various embodiments of the disclosure, it includes listing file names with to state "or" or " at least one of A or/and B "
Any combinations of word or all combinations.For example, statement " A or B " or " at least one of A or/and B " may include A, may include
B may include A and B both.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations
Various constituent element in example, but respective sets can not be limited into element.For example, presented above be not intended to limit the suitable of the element
Sequence and/or importance.The purpose presented above for being only used for differentiating an element and other elements.For example, the first user fills
It sets and indicates different user device with second user device, although the two is all user apparatus.For example, not departing from each of the disclosure
In the case of the range of kind embodiment, first element is referred to alternatively as second element, and similarly, second element is also referred to as first
Element.
It should be noted that：It, can be by the first composition member if a constituent element ' attach ' to another constituent element by description
Part is directly connected to the second constituent element, and " connection " third can be formed between the first constituent element and the second constituent element
Element.On the contrary, when a constituent element " being directly connected to " is arrived another constituent element, it will be appreciated that in the first constituent element
And second third constituent element is not present between constituent element.
The term used in the various embodiments of the disclosure is used only for the purpose of describing specific embodiments and not anticipates
In the various embodiments of the limitation disclosure.As used herein, singulative is intended to also include plural form, unless context is clear
Chu it is indicated otherwise.Unless otherwise defined, otherwise all terms (including technical terms and scientific terms) used herein have
There is meaning identical with the various normally understood meanings of embodiment one skilled in the art of the disclosure.The term
(term such as limited in the dictionary generally used) is to be interpreted as having and situational meaning in the related technical field
Identical meaning and the meaning that Utopian meaning or too formal will be interpreted as having, unless in the various of the disclosure
It is clearly defined in embodiment.
Referring to Fig. 1 to Fig. 2, in the utility model some embodiments, a kind of condensing turbine based on sorption type heat pump
1 is organized, including boiler 11, high pressure cylinder 12, intermediate pressure cylinder 13, low pressure (LP) cylinder 14 and the generator 15 being sequentially connected in series；
Medium pressure cylinder 13 is connected with hot pump in low temp residual neat recovering system 16；
The low pressure (LP) cylinder 14 is connected with the waste-heat recovery device 17 being connected to the hot pump in low temp residual neat recovering system 16；
The steam discharge of medium pressure cylinder 13 is used to be 16 heat supply of hot pump in low temp residual neat recovering system；
The waste-heat recovery device 17 is used to recycle the waste heat of the discharge of the low pressure (LP) cylinder 14, and waste heat supply is described low
Warm heat pump waste heat recovery system 16；
LCV valves 18A is equipped between medium pressure cylinder 13 and the low pressure (LP) cylinder 14.
Above-mentioned, the condensing turbine group 1 based on sorption type heat pump is not transformed host, and the maximum for not reducing host goes out
Power.LCV valve 18A are turned down during power grid is adjusted deeply, are adjusted to the driving steam flow of absorption heat pump 161.Pass through control
Low pressure (LP) cylinder 14 keeps 14 safe steam flow of low pressure (LP) cylinder into steam flow amount, by hot pump in low temp residual neat recovering system 16 by low pressure (LP) cylinder
14 exhausted spare heats recycle, and 13 steam discharge of intermediate pressure cylinder is completely used for heat supply in the case where not cutting off low pressure (LP) cylinder 14.Control LCV valves
18A apertures match with unit load, by the matching to 14 throttle flow of steam turbine high intermediate pressure cylinder 13 and low pressure (LP) cylinder, have both met low
14 rotor security of cylinder pressure, and meet heat supply steam extraction needs.Hot pump in low temp residual neat recovering system 16 is utilized simultaneously, steam turbine is cold
It holds exhaust heat all to recycle, is used for heating system.
The device provides a kind of hot pump in low temp heat recovery technologies.Preferably, host is followed using lithium bromide heat pump 161
Heat in ring water extracts, and heats heat supply network recirculated water.Extraction heat reaches 1.7 than (COP values), i.e., in extraction low-temperature heat source heat
The energy that 10 units are inputted during energy, extracts the energy of 7 units from the waste heat of recirculated water.
It is understood that 16 recyclable 11500 ton hour of host remaining hot water of hot pump in low temp residual neat recovering system, heating
10800 ton hour heat supply network recirculated waters, remaining hot water temperature drop reach 9~10 DEG C, corresponding promotion heat supply network 9~10 DEG C of Wen Sheng of recirculated water, day
Recovery waste heat 10000GJ.Turbine exhaust is extracted to the waste heat of air, reduces the hot driving to environment, in responsive electricity grid depth
Ensure heating demand while spending peak regulation, unit is realized under the premise of warm season can meet thermic load, by the electric load of unit
It minimizes.Alleviate the thermoelectricity contradiction in northern area heat supply period, increases flexibility and the elasticity of dispatching of power netwoks, suitable for pushing greatly
Extensively.
It is understood that technique can reduce unit electric load, fully dig in the case where meeting heat demand
The peak regulation potential of pick release network system.Within a very long time in future, thermal power plant's depth peak regulation disappearing as clean energy resource
It receives technology, will be a scarce resource, the new profit growth point of thermal power plant certainly will be become.
In the utility model some embodiments, the hot pump in low temp residual neat recovering system 16 includes heat pump 161 and heat supply network
Heater 162；
The heat pump 161 and the heat exchangers for district heating 162 are interconnected by heat supply network recirculated water.
In the utility model some embodiments, the waste-heat recovery device 17 includes condenser 171 and water tower 172；
The condenser 171 is connected to the water tower 172 by remaining hot water.
In the utility model some embodiments, the remaining hot water is through the heat pump 161 derived from the condenser 171
It is back to the water tower 172；
The remaining hot water heats the heat pump cycle water.
In the utility model some embodiments, the waste-heat recovery device 17 further includes for driving the waste heat flow
Dynamic water pump 173.
In the utility model some embodiments, the water pump 173 is set to the condenser 171 and the water tower 172
Between.
In the utility model some embodiments, between medium pressure cylinder 13 and the hot pump in low temp residual neat recovering system 16
Equipped with EV valves 18b.
Further include control device 18c in the utility model some embodiments；
The LCV valves 18A is connect with the control device 18c.
In the utility model some embodiments, the EV valves 18b is connect with the control device 18c.
Further include the first temperature detection dress being connect with the control device 18c in the utility model some embodiments
Set 18d；
The first temperature-detecting device 18d is set in the heat supply network recirculated water；
The first temperature-detecting device 18d prestores the first temperature threshold；
When the temperature that the first temperature-detecting device 18d is detected is less than first temperature threshold, the middle control
Device 18c control 18A, LCV valves reduce the low pressure (LP) cylinder 14 into steam flow amount.
It is to be appreciated that the utility model additionally provides the knot of thermoelectricity decoupling power grid depth peak regulation heat supply process experiment
Fruit, referring to Fig. 3.
Power grid depth peak regulation heat supply process is decoupled for thermoelectricity in figure and test brief result, it can be seen that in identical heating load
In the case of, after input heat pump 161 is run, unit generation load range has apparent increase, especially for lower bound load condition.
Typical condition compares：
Temperature rise period before heat supply network heat supply, heat supply network circulating water temperature rise 20 DEG C (40/60 DEG C), and single unit heat supply converts into steam extraction
About 340t/h is measured, according to the Heating Adjustment ability test that Tianjin DianKeYuan in 2015 is carried out by power grid commission, corresponding electric load
230~270MW；Use 161 heat supply of heat pump, steam extraction amount 200t/h, 132~300MW of electric load adjustable range.
Just latter stage, heat supply network circulating water temperature rise 35 DEG C (50/85 DEG C) for normal heat supply, convert into steam extraction amount 580t/h, if two
Unit mean allocation thermic load, steam extraction amount 290t/h, 220~280MW of unit electric load adjustable range；Use heat pump 161, single machine
Depth peak regulation may be implemented in heat supply, practical steam extraction amount 440t/h, corresponding electric load 250MW, another unit.
Deep cooling phase, heat supply network circulating water temperature rise 45 DEG C (55/100 DEG C), convert into steam extraction amount 750t/h, if two units are average
Distribute thermic load, steam extraction amount 375t/h, 230~270MW of unit electric load adjustable range；Use heat pump 161, #2 machine maximum steam extractions
Operating mode is run, corresponding electric load 260MW, No. 1 unit steam extraction amount 160t/h, 132~300MW of electric load adjustable range.
This technology also very advantageous in terms of energy conservation and environmental protection, using 16 recyclable steam turbine of hot pump in low temp residual neat recovering system
Cold end exhausted spare heat is reduced and is discharged to air, and recycling 240T/H displacements heat can reduce 172 evaporation capacity 120T/H of water tower.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiment of understanding.
Utility model voice is bright, and the utility model is by the series of detailed descriptions listed above only for this
The feasible embodiment of utility model illustrates, but the utility model is not limited to above-mentioned detailed process equipment and work
Skill flow.And do not mean that the utility model should rely on above-mentioned detailed process equipment and technological process and could implement.It is affiliated
Those skilled in the art it will be clearly understood that any improvement to the utility model, to each raw material of the utility model product etc.
Effect is replaced and the addition of auxiliary element, the selection etc. of concrete mode, all falls within the scope of protection of the utility model and the open scope
Within.
Claims (10)
1. a kind of condensing turbine group based on sorption type heat pump, it is characterised in that：Including be sequentially connected in series boiler, high pressure cylinder,
Intermediate pressure cylinder, low pressure (LP) cylinder and generator；
Medium pressure cylinder is connected with hot pump in low temp residual neat recovering system；
The low pressure (LP) cylinder is connected with the waste-heat recovery device being connected to the hot pump in low temp residual neat recovering system；
The steam discharge of medium pressure cylinder is used to be the hot pump in low temp residual neat recovering system heat supply；
The waste-heat recovery device is used to recycle the waste heat of low pressure (LP) cylinder discharge, and the waste heat is supplied more than the hot pump in low temp
Heat recovery system；
LCV valves are equipped between medium pressure cylinder and the low pressure (LP) cylinder.
2. a kind of condensing turbine group based on sorption type heat pump as described in claim 1, it is characterised in that：The Low Temperature Thermal
It includes heat pump and heat exchangers for district heating to pump residual neat recovering system；
The heat pump and the heat exchangers for district heating are interconnected by heat supply network recirculated water.
3. a kind of condensing turbine group based on sorption type heat pump as claimed in claim 2, it is characterised in that：The waste heat returns
Receiving apparatus includes condenser and water tower；
The condenser is connected to the water tower by remaining hot water.
4. a kind of condensing turbine group based on sorption type heat pump as claimed in claim 3, it is characterised in that：By the condensing
The remaining hot water derived from device is back to the water tower through the heat pump；
The remaining hot water heats the heat pump cycle water.
5. a kind of condensing turbine group based on sorption type heat pump as claimed in claim 4, it is characterised in that：The waste heat returns
Receiving apparatus further includes for driving the remaining hot water flowing water to pump.
6. a kind of condensing turbine group based on sorption type heat pump as claimed in claim 5, it is characterised in that：The water pump is set
It is placed between the condenser and the water tower.
7. a kind of condensing turbine group based on sorption type heat pump as described in claim 1, it is characterised in that：Medium pressure cylinder
EV valves are equipped between the hot pump in low temp residual neat recovering system.
8. a kind of condensing turbine group based on sorption type heat pump as claimed in claim 7, it is characterised in that：It further include middle control
Device；
The LCV valves are connect with the control device.
9. a kind of condensing turbine group based on sorption type heat pump as claimed in claim 8, it is characterised in that：The EV valves with
The control device connection.
10. a kind of condensing turbine group based on sorption type heat pump as claimed in claim 8, it is characterised in that：Further include with
First temperature-detecting device of the control device connection；
First temperature-detecting device is set in heat supply network recirculated water；
First temperature-detecting device prestores the first temperature threshold；
When the temperature that first temperature-detecting device detects is less than first temperature threshold, the control device control
The LCV valves reduce the low pressure (LP) cylinder into steam flow amount.
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| CN201721807753.9U CN207715198U (en) | 2017-12-21 | 2017-12-21 | A kind of condensing turbine group based on sorption type heat pump |
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| CN201721807753.9U CN207715198U (en) | 2017-12-21 | 2017-12-21 | A kind of condensing turbine group based on sorption type heat pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939463A (en) * | 2017-12-21 | 2018-04-20 | 天津国电津能热电有限公司 | A kind of condensing turbine group based on sorption type heat pump |
| CN112963210A (en) * | 2021-03-17 | 2021-06-15 | 国网天津市电力公司电力科学研究院 | Comprehensive control device with thermoelectric balance capability |
-
2017
- 2017-12-21 CN CN201721807753.9U patent/CN207715198U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939463A (en) * | 2017-12-21 | 2018-04-20 | 天津国电津能热电有限公司 | A kind of condensing turbine group based on sorption type heat pump |
| CN112963210A (en) * | 2021-03-17 | 2021-06-15 | 国网天津市电力公司电力科学研究院 | Comprehensive control device with thermoelectric balance capability |
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