CN106246263A - Extracted steam from turbine heat supply and back pressure are for hot change-over method - Google Patents
Extracted steam from turbine heat supply and back pressure are for hot change-over method Download PDFInfo
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- CN106246263A CN106246263A CN201610697784.7A CN201610697784A CN106246263A CN 106246263 A CN106246263 A CN 106246263A CN 201610697784 A CN201610697784 A CN 201610697784A CN 106246263 A CN106246263 A CN 106246263A
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- valve
- pressure
- communicating pipe
- shut
- turbine
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Classifications
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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
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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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 present invention provides a kind of extracted steam from turbine heat supply to supply hot change-over method with back pressure, including extracted steam from turbine operating mode switches to back pressure operating mode: unlock SSS clutch；Extraction for heat supply is regulated the automatic position of valve input control intermediate pressure cylinder exhaust steam pressure；After mesolow cylinder communicating pipe regulation valve exits the control automatic position of intermediate pressure cylinder exhaust steam pressure, close mesolow cylinder communicating pipe regulation valve；Close mesolow cylinder communicating pipe shut-off valve；And turbine back pressure operating mode is switched to operating mode of drawing gas: hydrophobic 2 doors after hydrophobic 1 door and shut-off valve after hydrophobic 2 doors, shut-off valves before hydrophobic 1 door, shut-off valve before opening shut-off valve；Open mesolow cylinder communicating pipe shut-off valve；Mesolow cylinder communicating pipe is regulated the automatic position of valve input control rotational speed of lower pressure turbine rotor；Locking SSS clutch；Mesolow cylinder communicating pipe is regulated the automatic position of valve input control intermediate pressure cylinder exhaust steam pressure；It is manual position that extraction for heat supply regulates Vavle switching.This invention removes the uncertainty and risk that manual operation brings.
Description
Technical field
The present invention relates to steam-turbine unit operating condition switch technology field, particularly to a kind of extracted steam from turbine heat supply with
Back pressure is for hot change-over method.
Background technology
Cogeneration units divides product unit promoting energy utilization rate, enhancing peak load regulation characteristic, meeting compared to thermoelectricity
To the friendliness of environment and reduce the aspects such as land utilization ratio and have significant advantage.
Co-generation turbine component is for drawing gas and back pressure type two kinds, and back pressure turbine is significantly high in terms of the thermal efficiency
In extraction turbine.But in order to mate for warm season and the non-warm season demand different to thermoelectricity load that supply, a kind of " coagulate and take out the back of the body " formula vapour
Wheel unit just arises at the historic moment.Wherein " coagulate " and represent pure condensate operating mode, can be at independent generator operation in summer；" take out " representative draw gas operating mode,
" carrying on the back " and represent back pressure operating mode, both can run by Heating Season in the winter time.
Heating Period in the winter time, heat is electricity determining by heat with the relation of electric load, and steam turbine employing is drawn gas and two kinds of operating modes of back pressure are cut
Change operation.At non-heating season, steam turbine runs with pure condensate operating mode.When Heating Season ambient temperature is higher, enter vapour meeting low pressure (LP) cylinder
On the premise of acting, the maximum heat supply of steam turbine is drawn gas flux matched external heat supply network burden requirement, then switch to operating mode of drawing gas to run；?
When Heating Season ambient temperature is relatively low, the maximum heat supply amount of drawing gas of steam turbine is unsatisfactory for external heat supply network burden requirement, low pressure (LP) cylinder and senior middle school
Cylinder off-the-line, high intermediate pressure cylinder steam discharge and low pressure (LP) cylinder filling converge and fully enter heat exchangers for district heating heat supply, and unit switches to back pressure operating mode
Running, at this moment high intermediate pressure cylinder is as back pressure unit isolated operation, enables unit heating load to maximize, greatly improves the energy
Producing level.As a example by 300MW level heat supply steam turbine, in the case of gas consumption is constant, maximum back pressure operating mode heat supply
Amount than maximum draw gas operating mode increase about 15%.
In order to prevent low pressure (LP) cylinder from producing action of blast under operating mode of drawing gas, low pressure (LP) cylinder enters porthole needs certain aperture with dimension
Holding minimum cooling flow, therefore, in operating mode of drawing gas during back pressure operating mode switches, low pressure (LP) cylinder enters porthole to be needed with faster
Speed is closed, and makes low pressure (LP) cylinder move back rapidly vapour off-the-line to prevent the slowly closing owing to entering porthole from producing low pressure (LP) cylinder action of blast.But
This process can make intermediate pressure cylinder exhaust steam pressure moment improve, so that intermediate pressure cylinder steam discharge pressure ratio produces violent disturbance.Equally, at the back of the body
Pressing to draw gas during operating mode switching, low pressure (LP) cylinder enters porthole and opens and makes low pressure rotor raising speed also can produce intermediate pressure cylinder steam discharge pressure ratio
Raw impact, operations staff's manual-lock or the unlatching each valve of steam turbine can reduce the disturbance of intermediate pressure cylinder steam discharge pressure ratio.But due to
The above-mentioned particularity drawn gas with back pressure operating mode handoff procedure, simple dependence staff's manual-lock or the unlatching each valve of steam turbine
Door, substantially increases operation pressure and difficulty, increases and cause steam-turbine unit thing because intermediate pressure cylinder steam discharge pressure ratio disturbance is excessive
Therefore the risk shut down.
Summary of the invention
Embodiments provide a kind of extracted steam from turbine heat supply with back pressure for hot change-over method, to solve prior art
In, staff's manual-lock or the unlatching each valve of steam turbine, substantially increase operation pressure and the problem of difficulty.The method
Including: when steam turbine heat supply deficiency, as follows extracted steam from turbine operating mode is switched to back pressure operating mode: unlock SSS clutch
Device；Extraction for heat supply is regulated the automatic position of valve input control intermediate pressure cylinder exhaust steam pressure；Control is exited at mesolow cylinder communicating pipe regulation valve
Behind the automatic position of intermediate pressure cylinder exhaust steam pressure processed, close mesolow cylinder communicating pipe regulation valve；Close mesolow cylinder communicating pipe shut-off valve；With
And, when without back pressure heat supply, as follows turbine back pressure operating mode is switched to operating mode of drawing gas: hydrophobic before opening shut-off valve
Hydrophobic 2 doors after hydrophobic 1 door and shut-off valve after hydrophobic 2 doors, shut-off valves before 1 door, shut-off valve；Open the connection of mesolow cylinder
Pipe shut-off valve；Mesolow cylinder communicating pipe is regulated the automatic position of valve input control rotational speed of lower pressure turbine rotor；Locking SSS clutch；In Jiang
The low pressure (LP) cylinder communicating pipe regulation automatic position of valve input control intermediate pressure cylinder exhaust steam pressure；It is manual position that extraction for heat supply regulates Vavle switching.
Wherein in a kind of embodiment, unlock SSS clutch, including: it is in maximum steam turbine and draws gas after operating mode, unlock
SSS clutch.
Wherein in a kind of embodiment, extraction for heat supply is regulated the automatic position of valve input control intermediate pressure cylinder exhaust steam pressure, including:
After stored program controlled receives the unblock feedback signal of SSS clutch, extraction for heat supply is regulated valve input control intermediate pressure cylinder steam discharge pressure
The automatic position of power.
Wherein in a kind of embodiment, exit the control automatic position of intermediate pressure cylinder exhaust steam pressure at mesolow cylinder communicating pipe regulation valve
After, close mesolow cylinder communicating pipe regulation valve, including: receive extraction for heat supply regulation valve at stored program controlled and be in intermediate pressure cylinder steam discharge pressure
After the feedback signal of the automatic position of power, after mesolow cylinder communicating pipe regulation valve exits the control automatic position of intermediate pressure cylinder exhaust steam pressure, close
Close mesolow cylinder communicating pipe regulation valve.
Wherein in a kind of embodiment, close mesolow cylinder communicating pipe shut-off valve, including: stored program controlled is receiving mesolow
After the fully closed feedback signal of cylinder communicating pipe regulation valve, time delay sends the signal closing mesolow cylinder communicating pipe shut-off valve.
Wherein in a kind of embodiment, after closing mesolow cylinder communicating pipe shut-off valve, when the rotating speed of low pressure rotor does not exists
When dropping to the first preset range in Preset Time, the rotating speed promoting low pressure rotor switches back into, to steam turbine, operating mode of drawing gas.
Wherein in a kind of embodiment, dredge after hydrophobic 2 doors, shut-off valves before hydrophobic 1 door, shut-off valve before opening shut-off valve
Hydrophobic 2 doors after 1 door of water and shut-off valve, including: after intermediate pressure cylinder exhaust steam pressure reaches the red switch design requirement of low pressure (LP) cylinder, beat
Hydrophobic 2 doors after hydrophobic 1 door and shut-off valve after hydrophobic 2 doors, shut-off valves before hydrophobic 1 door, shut-off valve before driving shut-off valve.
Wherein in a kind of embodiment, stored program controlled before receiving shut-off valve hydrophobic 2 doors before hydrophobic 1 door, shut-off valve,
After shut-off valve after hydrophobic 1 door and shut-off valve after the standard-sized sheet feedback signal of hydrophobic 2 doors, time delay sends opens the connection of mesolow cylinder
The signal of pipe shut-off valve.
Wherein in a kind of embodiment, mesolow cylinder communicating pipe is regulated the automatic position of valve input control rotational speed of lower pressure turbine rotor,
Including: after stored program controlled receives the standard-sized sheet feedback signal of mesolow cylinder communicating pipe shut-off valve, mesolow cylinder communicating pipe is regulated
The automatic position of valve input control rotational speed of lower pressure turbine rotor.
Wherein in a kind of embodiment, mesolow cylinder communicating pipe is regulated the automatic position of valve input control rotational speed of lower pressure turbine rotor,
Including: mesolow cylinder communicating pipe regulation valve, after rotational speed of lower pressure turbine rotor reaches warming-up rotating speed, stops beginning warming-up from disorder of internal organs；Warming-up is tied
Shu Hou, continues to open by mesolow cylinder communicating pipe regulation valve to rotational speed of lower pressure turbine rotor and reaches rated value.
Wherein in a kind of embodiment, mesolow cylinder communicating pipe is regulated the automatic position of valve input control rotational speed of lower pressure turbine rotor,
Including: mesolow cylinder communicating pipe regulation valve is opened to rotational speed of lower pressure turbine rotor and reaches rated value.
Wherein in a kind of embodiment, lock SSS clutch, including: the rotational speed of lower pressure turbine rotor received when stored program controlled is anti-
The deviation of feedback signal and High inter case speed feedback signal is when the second preset range, and stored program controlled time delay sends locking SSS
The signal of clutch
Wherein in a kind of embodiment, by automatic for mesolow cylinder communicating pipe regulation valve input control intermediate pressure cylinder exhaust steam pressure
Position, including: after stored program controlled receives the locking feedback signal of SSS clutch, mesolow cylinder communicating pipe regulation valve is put into control
The automatic position of intermediate pressure cylinder exhaust steam pressure processed.
Wherein in a kind of embodiment, it is manual position that extraction for heat supply regulates Vavle switching, including: in stored program controlled receives
After low pressure (LP) cylinder communicating pipe regulation valve is in the feedback signal controlling the automatic position of intermediate pressure cylinder exhaust steam pressure, extraction for heat supply is regulated valve and cuts
It is changed to manual position.
Wherein in a kind of embodiment, extraction for heat supply is being regulated after Vavle switching is manual position, when stored program controlled does not receives
When extraction for heat supply regulation valve is in the feedback signal of manual position, rotating speed to the steam turbine reducing low pressure rotor switches back into back pressure work
Condition.
In embodiments of the present invention, when steam turbine heat supply deficiency, extraction for heat supply is regulated valve and puts into automatic position basis
The aperture of the change self regulating valve door of intermediate pressure cylinder steam discharge pressure ratio；When without back pressure heat supply, mesolow cylinder communicating pipe is regulated
Valve puts into automatic position opening according to the change self regulating valve door of the change of rotational speed of lower pressure turbine rotor or intermediate pressure cylinder steam discharge pressure ratio
Degree, compared with manual operation of the prior art, eliminates the uncertainty and risk that complex condition manual operation brings, and is conducive to
Thermal power plant unit carries out the conversion of different operating mode under different conditions of demand, it is ensured that the safe and stable operation of steam-turbine unit.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
The accompanying drawing used required in is briefly described, it should be apparent that, the accompanying drawing in describing below is only some of the present invention
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing.
Fig. 1 be in the embodiment of the present invention extracted steam from turbine heat supply turn round pressure heat supply flow chart；
Fig. 2 is the flow chart that in the embodiment of the present invention, turbine back pressure heat supply turns extraction for heat supply；
Fig. 3 is that in the embodiment of the present invention, band draws gas-back pressure operating mode steam turbine schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Rely on staff's manual-lock in view of the switching of existing steam turbine operating mode is simple or opens each valve of steam turbine, pole
The earth adds operation pressure and difficulty, embodiments provides a kind of extracted steam from turbine heat supply with back pressure for hot-swap side
Method, beneficially thermal power plant unit carry out the conversion of different operating mode under different conditions of demand, eliminate complex condition manual operation
The uncertainty and risk brought, it is ensured that the safe and stable operation of steam-turbine unit.Below in conjunction with accompanying drawing, the present invention is carried out in detail
Explanation.
Fig. 3 is that in the embodiment of the present invention, band draws gas-back pressure operating mode steam turbine schematic diagram.As it is shown on figure 3, it is involved in the present invention
System include: extraction for heat supply regulation valve 1, mesolow cylinder communicating pipe shut-off valve 2, mesolow cylinder communicating pipe regulation valve 3, shut-off valve
Hydrophobic 2 doors 7, SSS clutch after hydrophobic 1 door 6 shut-off valve after hydrophobic 2 doors 5, shut-off valves before front hydrophobic 1 door 4, shut-off valve
Device 8, heat supply network heat exchanger 9 and condenser 10.
Fig. 1 be in the embodiment of the present invention extracted steam from turbine heat supply turn round pressure heat supply flow chart.As it is shown in figure 1, steam turbine
Extraction for heat supply turn round pressure heat supply flow process as follows:
Step 101: unlock SSS clutch 8.
Step 102: extraction for heat supply is regulated the automatic position of valve 1 input control intermediate pressure cylinder exhaust steam pressure.
Step 103: after mesolow cylinder communicating pipe regulation valve 3 exits the control automatic position of intermediate pressure cylinder exhaust steam pressure, in closedown
Low pressure (LP) cylinder communicating pipe regulation valve 3.
Step 104: close mesolow cylinder communicating pipe shut-off valve 2.
In embodiment, when low pressure (LP) cylinder moves back vapour off-the-line, steam turbine transfers back pressure operating mode to from operating mode of drawing gas.In operating mode of drawing gas
Time, Steam Turbine Through IP Admission arranged a steam part is continued acting generating by entering low pressure (LP) cylinder communicating pipe, and steam is coagulated by condenser 10
Form condensation water to enter heat supply network heat exchanger 9 through extraction line carry out heat exchange confession as boiler feed water recycling, another part
Heat.At this moment, extraction for heat supply regulation valve 1 is in manual position, can regulate the heat supply network amount of drawing gas by manual operation；Mesolow cylinder communicating pipe
Regulation valve 3 is in the control automatic position of intermediate pressure cylinder exhaust steam pressure.When the aperture of extraction for heat supply regulation valve 1 changes, program control system
System is automatically adjusted the aperture of mesolow cylinder communicating pipe regulation valve 3, to regulate intermediate pressure cylinder exhaust steam pressure value, it is ensured that intermediate pressure cylinder steam discharge pressure
Ratio is in safety value.
In embodiment, step 101 includes: is in maximum steam turbine and draws gas after operating mode, performs step 101；Can be by adjusting
Joint extraction for heat supply regulation valve 1 draws gas operating mode making steam turbine be in maximum.
In embodiment, step 102 includes: after stored program controlled receives the unblock feedback signal of SSS clutch 8, perform step
Rapid 102.Wherein, step 102 specifically includes: stored program controlled is according to intermediate pressure cylinder steam discharge pressure ratio, i.e. intermediate pressure cylinder initial steam pressure and steam discharge
The ratio of pressure, regulation extraction for heat supply regulation valve 1.When intermediate pressure cylinder steam discharge pressure ratio is higher than preset upper limit, extraction for heat supply regulation valve 1 is certainly
Move and open；When intermediate pressure cylinder steam discharge pressure ratio is less than pre-determined lower limit, extraction for heat supply regulation valve 1 is automatically switched off.
In embodiment, step 103 includes: receives extraction for heat supply regulation valve 1 at stored program controlled and is in intermediate pressure cylinder exhaust steam pressure
Automatically, after the feedback signal of position, step 103 is performed.Wherein, step 103 specifically includes: slowly closing mesolow cylinder communicating pipe adjusts
Joint valve 3, the rotating speed of low pressure rotor declines.
In embodiment, step 104 includes: when stored program controlled is in the fully closed feedback receiving mesolow cylinder communicating pipe regulation valve 3
After signal, time delay performs step 104, and now low pressure rotor enters the coasting operation stage.If low pressure rotor turns within the time of regulation
Speed does not drops to the first preset range, then stored program controlled automatic standard-sized sheet mesolow cylinder communicating pipe shut-off valve 2, simultaneously by mesolow cylinder
The aperture of communicating pipe regulation valve 3 returns to the minimum aperture that maximum is drawn gas under operating mode, and unit goes back to operating mode of drawing gas again.If low pressure
The rotating speed of rotor drops to the first preset range within the time of regulation, then handoff procedure terminates, and steam turbine enters back pressure operating mode.
Fig. 2 is the flow chart that in the embodiment of the present invention, turbine back pressure heat supply turns extraction for heat supply.As in figure 2 it is shown, steam turbine
The flow process that back pressure heat supply turns extraction for heat supply is as follows:
Step 201: hydrophobic 1 door 6 after hydrophobic 2 doors 5, shut-off valves before hydrophobic 1 door 4, shut-off valve before opening shut-off valve
And hydrophobic 2 doors 7 after shut-off valve.
Step 202: open mesolow cylinder communicating pipe shut-off valve 2.
Step 203: mesolow cylinder communicating pipe is regulated the automatic position of valve 3 input control rotational speed of lower pressure turbine rotor.
Step 204: locking SSS clutch 8.
Step 205: mesolow cylinder communicating pipe is regulated the automatic position of valve 3 input control intermediate pressure cylinder exhaust steam pressure.
Step 206: extraction for heat supply is regulated valve 1 by switching to manual position.
In embodiment, when stored program controlled makes the on-line automatic raising speed of low pressure rotor and by SSS clutch 8 and high intermediate pressure cylinder
During engagement, steam turbine transfers extraction for heat supply operating mode from back pressure to for thermal condition.Step 201 includes: reach at intermediate pressure cylinder exhaust steam pressure
After the red switch design of low pressure (LP) cylinder requires, perform step 201.
In embodiment, stored program controlled is before receiving shut-off valve before hydrophobic 1 door 4, shut-off valve after hydrophobic 2 doors 5, shut-off valves
After hydrophobic 1 door 6 and shut-off valve after the standard-sized sheet feedback signal of hydrophobic 2 doors 7, time delay performs step 202.
In embodiment, step 203 includes: receive the standard-sized sheet feedback letter of mesolow cylinder communicating pipe shut-off valve 2 at stored program controlled
After number, perform step 203.Wherein, step 203 specifically includes: slowly opens mesolow cylinder communicating pipe regulation valve 3 and makes low pressure rotor
By given pace raising speed.
When being embodied as, step 203 can be further divided into following two situation:
When steam turbine needs warming-up, open low pressure (LP) cylinder communicating pipe regulation valve 3, until the rotating speed of low pressure rotor reaches warming-up
Rotating speed, at this moment low pressure (LP) cylinder communicating pipe regulation valve 3 stops from disorder of internal organs, and low pressure rotor maintains warming-up rotating speed to terminate to warming-up.Warming-up terminates
After, when low pressure (LP) cylinder associated safety parameter meets and continues to rush car requirement, low pressure (LP) cylinder communicating pipe regulation valve 3 turns at control low pressure rotor
Speed continues on, until rotational speed of lower pressure turbine rotor reaches 3000 turns of (RPM, revolutions per per minute under position automatically
minute).In low pressure rotor boosting velocity procedure, extraction for heat supply regulation valve 1 is in the control automatic position of intermediate pressure cylinder exhaust steam pressure.
When steam turbine is without warming-up, mesolow cylinder communicating pipe regulation valve 3 is opened to rotational speed of lower pressure turbine rotor and is reached
3000RPM。
In embodiment, step 204 includes: the rotational speed of lower pressure turbine rotor feedback signal received when stored program controlled and High inter case
When the deviation of speed feedback signal is in the second preset range, stored program controlled time delay sends the signal of locking SSS clutch 8.When
The rotational speed of lower pressure turbine rotor feedback signal that stored program controlled receives is default beyond second with the deviation of High inter case speed feedback signal
During scope, stored program controlled time delay sends closes mesolow cylinder communicating pipe shut-off valve 2, the signal of mesolow cylinder communicating pipe regulation valve 3,
Steam turbine switches back into back pressure operating mode.
In embodiment, step 205 includes: after stored program controlled receives the locking feedback signal of SSS clutch 8, perform step
Rapid 205.
In embodiment, step 205 includes: receives mesolow cylinder communicating pipe regulation valve 3 at stored program controlled and is in control pressure
After the feedback signal of the automatic position of cylinder exhaust steam pressure, perform step 206.
In embodiment, step 205 also includes: be in the anti-of manual position when stored program controlled does not receives extraction for heat supply regulation valve 1
During feedback signal, rotating speed to the steam turbine reducing low pressure rotor switches back into back pressure operating mode.
As seen from the above-described embodiment, the extracted steam from turbine heat supply of the embodiment of the present invention and back pressure are for hot change-over method, at vapour
During turbine heat supply deficiency, extraction for heat supply is regulated the valve automatic position of input and the change according to intermediate pressure cylinder steam discharge pressure ratio adjusts automatically
The aperture of valve；When without back pressure heat supply, mesolow cylinder communicating pipe regulation valve is put into automatic position and turns according to low pressure rotor
The change of speed or the aperture of the change self regulating valve door of intermediate pressure cylinder steam discharge pressure ratio, compared with manual operation of the prior art,
Eliminate the uncertainty and risk that complex condition manual operation brings, beneficially thermal power plant unit to carry out not under different conditions of demand
Conversion with operating mode, it is ensured that the safe and stable operation of steam-turbine unit.
Particular embodiments described above, has been carried out the purpose of the present invention, technical scheme and beneficial effect the most in detail
Describe in detail bright, be it should be understood that the specific embodiment that the foregoing is only the present invention, the guarantor being not intended to limit the present invention
Protect scope, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in this
Within the protection domain of invention.
Claims (15)
1. an extracted steam from turbine heat supply supplies hot change-over method with back pressure, it is characterised in that including:
When steam turbine heat supply deficiency, as follows extracted steam from turbine operating mode is switched to back pressure operating mode:
Unlock SSS clutch (8)；
Extraction for heat supply is regulated the automatic position of valve (1) input control intermediate pressure cylinder exhaust steam pressure；
After exiting control intermediate pressure cylinder exhaust steam pressure automatic position mesolow cylinder communicating pipe regulation valve (3), close the connection of mesolow cylinder
Pipe regulation valve (3)；
Close mesolow cylinder communicating pipe shut-off valve (2)；
And, when without back pressure heat supply, as follows turbine back pressure operating mode is switched to operating mode of drawing gas:
Hydrophobic 1 door (6) and shutoff after hydrophobic 2 doors (5), shut-off valves before hydrophobic 1 door (4), shut-off valve before opening shut-off valve
Hydrophobic 2 doors (7) after valve；
Open mesolow cylinder communicating pipe shut-off valve (2)；
Mesolow cylinder communicating pipe is regulated the automatic position of valve (3) input control rotational speed of lower pressure turbine rotor；
Locking SSS clutch (8)；
Mesolow cylinder communicating pipe is regulated the automatic position of valve (3) input control intermediate pressure cylinder exhaust steam pressure；
Extraction for heat supply is regulated valve (1) and switches to manual position.
2. extracted steam from turbine heat supply as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that unlock SSS from
Clutch (8), including: it is in maximum steam turbine and draws gas after operating mode, unlock SSS clutch (8).
3. extracted steam from turbine heat supply as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that by extraction for heat supply
The regulation automatic position of valve (1) input control intermediate pressure cylinder exhaust steam pressure, including: the unblock receiving SSS clutch (8) at stored program controlled is anti-
After feedback signal, extraction for heat supply is regulated the automatic position of valve (1) input control intermediate pressure cylinder exhaust steam pressure.
4. extracted steam from turbine heat supply as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that at mesolow cylinder
After exiting control intermediate pressure cylinder exhaust steam pressure automatic position communicating pipe regulation valve (3), close mesolow cylinder communicating pipe regulation valve (3), bag
Include: receive after extraction for heat supply regulation valve (1) is in the feedback signal of the automatic position of intermediate pressure cylinder exhaust steam pressure at stored program controlled, in low
After exiting control intermediate pressure cylinder exhaust steam pressure automatic position cylinder pressure communicating pipe regulation valve (3), close mesolow cylinder communicating pipe regulation valve
(3)。
5. extracted steam from turbine heat supply as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that close mesolow
Cylinder communicating pipe shut-off valve (2), including: stored program controlled after the fully closed feedback signal receiving mesolow cylinder communicating pipe regulation valve (3),
Time delay sends the signal closing mesolow cylinder communicating pipe shut-off valve (2).
6. extracted steam from turbine heat supply as claimed in claim 5 and back pressure are for hot change-over method, it is characterised in that low in closedown
After cylinder pressure communicating pipe shut-off valve (2), when the rotating speed of low pressure rotor does not drops to the first preset range in Preset Time, promote
The rotating speed of low pressure rotor switches back into, to steam turbine, operating mode of drawing gas.
7. extracted steam from turbine heat supply as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that open shut-off valve
Before hydrophobic 2 doors after hydrophobic 1 door (6) and shut-off valve after hydrophobic 2 doors (5), shut-off valves before hydrophobic 1 door (4), shut-off valve
(7), including: reach after the red switch design of low pressure (LP) cylinder requires at intermediate pressure cylinder exhaust steam pressure, hydrophobic 1 door (4) before opening shut-off valve,
Hydrophobic 2 doors (7) after hydrophobic 1 door (6) and shut-off valve after hydrophobic 2 doors (5), shut-off valves before shut-off valve.
8. extracted steam from turbine heat supply as claimed in claim 7 and back pressure are for hot change-over method, it is characterised in that stored program controlled exists
Before receiving shut-off valve before hydrophobic 1 door (4), shut-off valve after hydrophobic 2 doors (5), shut-off valves after hydrophobic 1 door (6) and shut-off valve
After the standard-sized sheet feedback signal of hydrophobic 2 doors (7), time delay sends the signal opening mesolow cylinder communicating pipe shut-off valve (2).
9. extracted steam from turbine heat supply as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that by mesolow cylinder
The communicating pipe regulation automatic position of valve (3) input control rotational speed of lower pressure turbine rotor, including: receive at stored program controlled and close mesolow cylinder communicating pipe
After the standard-sized sheet feedback signal of disconnected valve (2), mesolow cylinder communicating pipe is regulated the automatic position of valve (3) input control rotational speed of lower pressure turbine rotor.
10. extracted steam from turbine heat supply as claimed in claim 9 and back pressure are for hot change-over method, it is characterised in that by mesolow
The cylinder communicating pipe regulation automatic position of valve (3) input control rotational speed of lower pressure turbine rotor, including: mesolow cylinder communicating pipe regulation valve (3) is low
After pressure rotor speed reaches warming-up rotating speed, stop beginning warming-up from disorder of internal organs；After warming-up terminates, mesolow cylinder communicating pipe is regulated valve
(3) continue to open to rotational speed of lower pressure turbine rotor and reach rated value.
11. extracted steam from turbine heat supplies as claimed in claim 9 and back pressure are for hot change-over method, it is characterised in that by mesolow
The cylinder communicating pipe regulation automatic position of valve (3) input control rotational speed of lower pressure turbine rotor, including: mesolow cylinder communicating pipe regulation valve (3) is beaten
Open to rotational speed of lower pressure turbine rotor and reach rated value.
12. extracted steam from turbine heat supplies as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that locking SSS from
Clutch (8), including: the rotational speed of lower pressure turbine rotor feedback signal received when stored program controlled is inclined with High inter case speed feedback signal
Difference is when the second preset range, and stored program controlled time delay sends the signal of locking SSS clutch (8).
13. extracted steam from turbine heat supplies as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that by mesolow
The cylinder communicating pipe regulation automatic position of valve (3) input control intermediate pressure cylinder exhaust steam pressure, including: receive SSS clutch (8) at stored program controlled
Locking feedback signal after, by mesolow cylinder communicating pipe regulate the automatic position of valve (3) input control intermediate pressure cylinder exhaust steam pressure.
14. extracted steam from turbine heat supplies as claimed in claim 1 and back pressure are for hot change-over method, it is characterised in that confession of drawing gas
Heat regulating valve (1) switches to manual position, including: receive at stored program controlled and be in control mesolow cylinder communicating pipe regulation valve (3)
After the feedback signal of the automatic position of cylinder pressure exhaust steam pressure, extraction for heat supply is regulated valve (1) and switches to manual position.
15. extracted steam from turbine heat supplies as claimed in claim 14 and back pressure are for hot change-over method, it is characterised in that will draw gas
After switching to manual position for heat regulating valve (1), it is in the feedback of manual position when stored program controlled does not receives extraction for heat supply regulation valve (1)
During signal, rotating speed to the steam turbine reducing low pressure rotor switches back into back pressure operating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610697784.7A CN106246263A (en) | 2016-08-19 | 2016-08-19 | Extracted steam from turbine heat supply and back pressure are for hot change-over method |
Applications Claiming Priority (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165687A (en) * | 2017-06-30 | 2017-09-15 | 国电科学技术研究院 | A kind of flexibility cuts off the extraction for heat supply system and control method of low pressure (LP) cylinder |
| CN109782584A (en) * | 2019-01-21 | 2019-05-21 | 杭州澎康自动化科技有限公司 | A kind of pumping back type steam turbine self-adjusting control |
| CN113266435A (en) * | 2021-07-02 | 2021-08-17 | 华北电力科学研究院有限责任公司 | Method and device for adjusting high exhaust pressure by using medium-pressure adjusting door |
| CN114922708A (en) * | 2022-05-13 | 2022-08-19 | 华电电力科学研究院有限公司 | Operation stopping method based on supercritical reheating type double-extraction heat supply backpressure unit system |
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| US20130199151A1 (en) * | 2010-05-20 | 2013-08-08 | Pramurtta Shourjya Majumdar | Steam Generator for Combined Cycle Gas Turbine Plant |
| CN104343474A (en) * | 2013-07-26 | 2015-02-11 | 华能北京热电有限责任公司 | Steam turbine, gas-steam combined cycle unit and running method of cycle unit |
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| JPS59126006A (en) * | 1983-01-07 | 1984-07-20 | Mitsui Eng & Shipbuild Co Ltd | Marine heating system of ship necessitating tank heating |
| US20130199151A1 (en) * | 2010-05-20 | 2013-08-08 | Pramurtta Shourjya Majumdar | Steam Generator for Combined Cycle Gas Turbine Plant |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165687A (en) * | 2017-06-30 | 2017-09-15 | 国电科学技术研究院 | A kind of flexibility cuts off the extraction for heat supply system and control method of low pressure (LP) cylinder |
| CN107165687B (en) * | 2017-06-30 | 2019-11-15 | 国电科学技术研究院有限公司 | A kind of the extraction for heat supply system and control method of flexibility excision low pressure (LP) cylinder |
| CN109782584A (en) * | 2019-01-21 | 2019-05-21 | 杭州澎康自动化科技有限公司 | A kind of pumping back type steam turbine self-adjusting control |
| CN113266435A (en) * | 2021-07-02 | 2021-08-17 | 华北电力科学研究院有限责任公司 | Method and device for adjusting high exhaust pressure by using medium-pressure adjusting door |
| CN113266435B (en) * | 2021-07-02 | 2023-06-06 | 华北电力科学研究院有限责任公司 | Method and device for adjusting high discharge pressure by medium-pressure regulating door |
| CN114922708A (en) * | 2022-05-13 | 2022-08-19 | 华电电力科学研究院有限公司 | Operation stopping method based on supercritical reheating type double-extraction heat supply backpressure unit system |
| CN114922708B (en) * | 2022-05-13 | 2023-08-22 | 华电电力科学研究院有限公司 | Operation stopping method based on supercritical reheating type double-pumping heat supply back pressure unit system |
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