CN106322346B - A kind of method of direct current cooker sliding parameter blowing out - Google Patents
A kind of method of direct current cooker sliding parameter blowing out Download PDFInfo
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- CN106322346B CN106322346B CN201510375395.8A CN201510375395A CN106322346B CN 106322346 B CN106322346 B CN 106322346B CN 201510375395 A CN201510375395 A CN 201510375395A CN 106322346 B CN106322346 B CN 106322346B
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Abstract
The present invention provides a kind of method of direct current cooker sliding parameter blowing out comprising following steps: 1) after generating set stoppage in transit, direct current cooker being kept not stop working；2) quantity combusted of direct current cooker is controlled in 10%-20%, and when the steam-water separator of direct current cooker meets the first preset condition, the high and low pressure bypass of steam turbine is opened, so that direct current cooker fast cooling.The method of direct current cooker sliding parameter blowing out of the present invention can make in a shorter time the temperature of direct current cooker be down to maintenance temperature compared with the prior art.
Description
Technical field
The present invention relates to power plant's production technical fields, and in particular to a kind of method of direct current cooker sliding parameter blowing out.
Background technique
In power plant's production process, a generating set is (mainly by direct current cooker, steam turbine, generator and associated shunt
Composition) generate economic profit be built upon on the basis run steadily in the long term, to enable generating set steadily in the long term
Operation, needs to make generating set maintenance down according to plan, correspondingly, it is necessary to make direct current cooker blowing out according to plan.
Currently, in industry mainly by the way of sliding parameter blowing out, specifically: keep all regulating valves of steam turbine all to open
It opens, weakens direct current cooker burning gradually, so that the steam of output to steam turbine is gradually decreased, until blowing out.
Using the direct current cooker of existing sliding parameter blowing out mode temperature lowering curve as shown in Figure 1, from figure 1 it appears that
Need to expend 72 hours just and can make the temperature of direct current cooker from initial temperature (such as 420 DEG C or so) be down to maintenance temperature (such as
60 DEG C or so), it takes a long time, thus electric power resource had both been wasted, also affect normal production.
As it can be seen that designing a kind of sliding parameter blowing out that the temperature of direct current cooker can be made to be down to maintenance temperature in a shorter time
Method becomes a technical problem to be solved urgently.
Summary of the invention
The technical problem to be solved by the present invention is to provide one kind and compare for the drawbacks described above in the presence of the prior art
The temperature of direct current cooker can be made to be down to the direct current cooker sliding parameter blowing out side of maintenance temperature in a shorter time in the prior art
Method.
Solving technical solution used by present invention problem is:
The present invention provides a kind of method of direct current cooker sliding parameter blowing out comprising following steps:
1) after generating set stoppage in transit, direct current cooker is kept not stop working；
2) quantity combusted of direct current cooker is controlled in 10%-20%, and meets the in the steam-water separator of direct current cooker
When one preset condition, the high and low pressure bypass of steam turbine is opened, so that direct current cooker fast cooling.
Preferably, in step 2), first preset condition are as follows: the outlet pressure of the steam-water separator of direct current cooker is
The 30% of its rated pressure, outlet temperature are the 70% of its rated temperature.
Preferably, in step 2), the quantity combusted of direct current cooker is controlled 15%.
Preferably, in step 2), make the 15%-30% of its rated capacity of the evaporation capacity of direct current cooker.
Preferably, in step 2), make direct current cooker after cooling 28 hours to the cooling being cooled to during overhauling temperature
Rate less than 0.03 DEG C/min, and/or, make direct current cooker from decompression 16 hours after it is small to the rate of pressure reduction during being depressurized to 0MPa
In 0.02MPa/min.
Preferably, the method also includes:
3) when the steam-water separator of direct current cooker meets the second preset condition, keep direct current cooker flame-out, and close after stopping working
Close the high and low pressure bypass of steam turbine.
Preferably, in step 3), second preset condition are as follows: the outlet pressure of the steam-water separator of direct current cooker is
0.8-1.2MPa, outlet temperature are 180-250 DEG C.
Preferably, step 3) further include: after the bypass of steam turbine high and low pressure is closed, carry out direct current cooker directly with pressure
It discharges water, and so that direct current cooker is kept cold stoking state during discharging water.
Preferably, step 3) further include: after the furnace water of direct current cooker drains, direct current cooker is made to continue to keep cold stoking state
6 hours, then make direct current cooker gravity-flow ventilation 6 hours cooling.
Preferably, step 3) further include: when the outlet temperature of the steam-water separator of direct current cooker is down to 100 DEG C or less,
Unlatching is sent, air-introduced machine carries out direct current cooker to force cooling 6 hours.
The utility model has the advantages that
Experiments verify that the method for direct current cooker sliding parameter blowing out of the present invention only needs 48 hours can make direct current cooker
Temperature be down to maintenance temperature, and the method for the direct current cooker sliding parameter blowing out of the prior art needs 72 hours can just make direct current pot
The temperature of furnace is down to maintenance temperature, it is seen then that the present invention can make direct current cooker more rapidly be down to inspection compared with the prior art
Temperature is repaired, so as to shorten the stoppage in transit repair time of generating set, to provide maintenance in a shorter time for steam turbine equipment maintenance
Operating condition, and then improve unit generation benefit.
Detailed description of the invention
Fig. 1 is the temperature lowering curve figure using the direct current cooker of existing sliding parameter blowing out mode；
Fig. 2 is the method flow diagram of direct current cooker sliding parameter blowing out provided in an embodiment of the present invention；
Fig. 3 is the temperature lowering curve figure using the direct current cooker of sliding parameter blowing out mode provided in an embodiment of the present invention；
Fig. 4 is existing sliding parameter blowing out mode and sliding parameter blowing out mode provided in an embodiment of the present invention is respectively adopted straight
Flow the temperature lowering curve comparison diagram of boiler.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawings and examples to this
Invention is described in further detail.
As shown in Fig. 2, the embodiment of the present invention provides a kind of method of direct current cooker sliding parameter blowing out, the method is applied to
Using the generating set of direct current cooker, specifically, which includes direct current cooker, steam turbine, generator and related side
Road.Wherein, direct current cooker includes steam-water separator, and steam-water separator is the important component (attachment) of direct current cooker, effect
It is that the water that will contain in saturated vapor efficiently separates out, improves steam quality, to guarantee the reliable of direct current cooker operation, and
Meet the needs of user.Specifically, the steam that direct current cooker generates enters steam turbine, so that steam turbine is done work, and then make steam turbine
Drive generator rotation power generation.
Described method includes following steps:
S101. after generating set stoppage in transit, direct current cooker is kept not stop working.
S102. the quantity combusted of direct current cooker is controlled in 10%-20%, and met in the steam-water separator of direct current cooker
When the first preset condition, the high and low pressure bypass of steam turbine is opened, the steam for generating direct current cooker flows through the high and low of steam turbine
Pressure bypass, to make direct current cooker fast cooling.
Those skilled in the art can determine to open the high and low pressure bypass of steam turbine according to the actual conditions of generating set
Opportunity, in the present embodiment, the opportunity, i.e. the first preset condition, specifically: the outlet pressure of the steam-water separator of direct current cooker is
The 30% of its rated pressure, outlet temperature are the 70% of its rated temperature.At this point, steam turbine off-the-line, and steam turbine main inlet throttle-stop valve
It has been switched off, the steam to generate direct current cooker burning is condensed, and is kept the continuity of thermodynamic cycle, should be opened steamer at this time
The high and low pressure of machine bypasses, so that the steam for generating direct current cooker is directly discharged into condenser without steam turbine.Wherein, on
State that rated pressure and rated temperature are related with the model of direct current cooker, it can be by those skilled in the art according to the reality of direct current cooker
Model determines.
In step s 102, maintain the quantity combusted of direct current cooker between 10%-20%, to will not both make direct current pot
Furnace is easily put out a fire (quantity combusted is greater than 10%), and can make direct current cooker fast cooling (quantity combusted is less than 20%).Preferably, by direct current
The quantity combusted of boiler is controlled 15%；In step s 102, its rated capacity of the evaporation capacity of direct current cooker can also be made
15%-30%, thus will not both make direct current cooker part overtemperature of tube wall (15% of evaporation capacity greater than rated capacity), it will not
Direct current cooker is set to be discharged into the quantity of steam excessive (30% of evaporation capacity less than rated capacity) of exhaust apparatus and excessively increase exhaust
The load of device.Preferably, make the 20% of its rated capacity of the evaporation capacity of direct current cooker.
Further, by the control of quantity combusted, spray water flux to direct current cooker, and the high and low of steam turbine is adjusted
Press bypass aperture, can make direct current cooker from cooling 28 hours after to be cooled to maintenance temperature during rate of temperature fall less than 0.03
DEG C/min, and direct current cooker is made to be less than 0.02MPa/min to the rate of pressure reduction during being depressurized to 0MPa after decompression 16 hours,
To keep the post drop of direct current cooker, pressure decay rate slower under the premise of meeting direct current cooker final repair time, so that
Metal can obtain sufficient, slow, uniform cooling and decompression to direct current cooker everywhere, and be conducive to extend boiler uses the longevity
Life, and the fast speed (being realized by preceding feature) for making cool down the early period of direct current cooker, being depressured, so as to shorten direct current cooker institute
Temperature fall time is needed, direct current cooker is made more rapidly to be down to maintenance temperature.
In addition, the above method can also include:
S103. when the steam-water separator of direct current cooker meets the second preset condition, keep direct current cooker flame-out, and it is flame-out after
Close the high and low pressure bypass of steam turbine.
Those skilled in the art can determine the opportunity for keeping direct current cooker flame-out, this reality according to the actual conditions of generating set
It applies in example, the opportunity, i.e. the second preset condition, specifically: the outlet pressure of the steam-water separator of direct current cooker is 0.8-
1.2MPa, outlet temperature are 180-250 DEG C.The actual conditions of direct current cooker have reached the ginseng that discharges water for meeting boiler factory's permission at this time
Number, therefore direct current cooker can be made flame-out, and the high and low pressure bypass that steam turbine is closed after direct current cooker is flame-out can prevent direct current
The remaining thermogenetic steam of boiler is missed by the bypass of the high and low pressure of steam turbine, and then avoids the temperature of boiler body metal everywhere
Degree decline it is too fast and caused by injure.
In addition, in step s 103, after the bypass of steam turbine high and low pressure is closed, direct current cooker can be made directly to carry out with pressure
It discharges water, and so that direct current cooker is kept cold stoking state during discharging water, so that boiler body each section when direct current cooker full water
Metal can be cooled down uniformly.Here, " cold stoking " refers to: closing all manhole doors, peephole door on boiler body, closes pot
All gas baffles of furnace, and draw, give, primary air fan entrance baffle, so that dragveyer is not discharged water, to keep boiler closed.
Further, in step s 103, after the furnace water of direct current cooker drains, direct current cooker can be made to continue to keep cold stoking
State 6 hours, so that the metal of boiler body each section can be cooled down uniformly after direct current cooker discharges water, then make direct current pot
Furnace gravity-flow ventilation is 6 hours cooling, it may be assumed that opens all manhole doors, peephole door on boiler body, opens all flue gas gears of boiler
Plate, and draw, give, primary air fan entrance baffle, so that dragveyer is discharged water, to keep boiler not closed, and then accelerates direct current cooker
Cooling.
In addition, in step s 103, it, can when the outlet temperature of the steam-water separator of direct current cooker is down to 100 DEG C or less
Unlatching is sent, air-introduced machine carries out direct current cooker to force cooling 6 hours.Because the outlet temperature of the steam-water separator of direct current cooker drops
When to 100 DEG C or less, the temperature of direct current cooker metal everywhere is had fallen in safe range, will not occur to drop because of metal temperature
Temperature it is too fast and caused by shrink uneven, will not more cause direct current cooker to leak, at this point it is possible to start give, air-introduced machine carries out burner hearth
Ventilation, to accelerate the cooling of direct current cooker metal everywhere, the temperature of boiler body is just down to inspection after general ventilating and cooling 6 hours
Temperature is repaired, staff, which can enter in boiler body, work.
Experiments verify that temperature lowering curve such as Fig. 3 of the direct current cooker using the sliding parameter blowing out mode of the embodiment of the present invention
It is shown, and the direct current cooker of existing sliding parameter blowing out mode and sliding parameter blowing out mode provided in an embodiment of the present invention is respectively adopted
Temperature lowering curve comparison diagram as shown in figure 4, in Fig. 4, chain-dotted line indicates the direct current cooker using existing sliding parameter blowing out mode
Temperature lowering curve, solid line indicate using inventive embodiments provide sliding parameter blowing out mode direct current cooker temperature lowering curve.From
Fig. 3 and Fig. 4 can be seen that the method using sliding parameter blowing out provided in an embodiment of the present invention only need 48 hours (from generating set
Stop transport and start timing) with regard to the cooling work of achievable direct current cooker, i.e., 60 DEG C are down to from 420 DEG C, compared to using existing cunning
The method of parameter blowing out needs the cooling work that (timing since being stopped transport generating set) could complete direct current cooker in 72 hours, this
Invention provides upkeep operation condition in a shorter time for boiler plant maintenance.Further, since the word shutdown maintenance time is compared
It can be saved -48 hours 72 hours=24 hours in the prior art, based on two generating sets every year on average normal shutdown maintenance 4 times
Calculate, furnace outage time can be saved 24 hours × 4=96 hour, by every generating set per hour 350MW generated energy calculating, every year
It at least can multiple 33,600,000 degree of electricity.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of method of direct current cooker sliding parameter blowing out, which comprises the steps of:
1) after generating set stoppage in transit, direct current cooker is kept not stop working；
2) quantity combusted of direct current cooker is controlled in 10%-20%, and meets first in advance in the steam-water separator of direct current cooker
If when condition, the high and low pressure bypass of steam turbine is opened, so that direct current cooker fast cooling；
In step 2), first preset condition are as follows: the outlet pressure of the steam-water separator of direct current cooker is its rated pressure
30%, outlet temperature be its rated temperature 70%.
2. the method according to claim 1, wherein the quantity combusted control of direct current cooker is existed in step 2)
15%.
3. the method according to claim 1, wherein making its volume of the evaporation capacity of direct current cooker in step 2)
Determine the 15%-30% of evaporation capacity.
4. method according to any one of claim 1-3, which is characterized in that in step 2), make direct current cooker from drop
To the rate of temperature fall being cooled to during overhauling temperature less than 0.03 DEG C/min after 28 hours warm, and/or, make direct current cooker from decompression
It is less than 0.02MPa/min to the rate of pressure reduction during being depressurized to 0MPa after 16 hours.
5. the method according to claim 1, wherein the method also includes:
3) when the steam-water separator of direct current cooker meets the second preset condition, keep direct current cooker flame-out, and close vapour after stopping working
The high and low pressure of turbine bypasses.
6. according to the method described in claim 5, it is characterized in that, in step 3), second preset condition are as follows: direct current pot
The outlet pressure of the steam-water separator of furnace is 0.8-1.2MPa, and outlet temperature is 180-250 DEG C.
7. according to the method described in claim 5, it is characterized in that, step 3) further include: bypass and close in steam turbine high and low pressure
Afterwards, make direct current cooker directly carry out it is with pressure discharge water, and direct current cooker is made during discharging water to keep cold stoking state.
8. the method according to the description of claim 7 is characterized in that step 3) further include: after the furnace water of direct current cooker drains,
Make direct current cooker continue to be kept for cold stoking state 6 hours, then makes direct current cooker gravity-flow ventilation 6 hours cooling.
9. according to the method described in claim 5, it is characterized in that, step 3) further include: in the steam-water separator of direct current cooker
Outlet temperature when being down to 100 DEG C or less, unlatching is given, air-introduced machine direct current cooker force it is 6 hours cooling.
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| CN201510375395.8A CN106322346B (en) | 2015-06-30 | 2015-06-30 | A kind of method of direct current cooker sliding parameter blowing out |
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| CN201510375395.8A CN106322346B (en) | 2015-06-30 | 2015-06-30 | A kind of method of direct current cooker sliding parameter blowing out |
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| CN110454765A (en) * | 2019-09-04 | 2019-11-15 | 张选 | The method that Circulating Fluidized Bed Boilers depth sliding parameter is stopped transport |
| CN113898933B (en) * | 2021-10-27 | 2023-11-10 | 华能山东石岛湾核电有限公司 | Cooling method of electrode steam boiler |
| CN114777100A (en) * | 2022-05-11 | 2022-07-22 | 马鞍山钢铁股份有限公司 | Blowing-out method for quickly cooling full-combustion gas boiler |
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| JPH0755104A (en) * | 1993-08-09 | 1995-03-03 | Ishikawajima Harima Heavy Ind Co Ltd | Starting method for hot-banked boiler |
| CN201748397U (en) * | 2010-08-12 | 2011-02-16 | 广州迪森热能技术股份有限公司 | Biomass boiler control system |
| DE102011009243A1 (en) * | 2011-01-24 | 2012-07-26 | Joachim Kümmel | Method for preventing bumping in fluidized bed immersion heating surfaces at high steam generator, involves setting operating pressure of steam boiler to specific value so that high pressure steam is injected from auxiliary boiler |
| CN202432501U (en) * | 2011-12-20 | 2012-09-12 | 郑州智慧通测控技术有限公司 | Steam boiler controller and hot water boiler controller |
| CN103423728A (en) * | 2013-08-13 | 2013-12-04 | 南京钢铁股份有限公司 | Boiler thermal state sliding-parameter shutdown method |
-
2015
- 2015-06-30 CN CN201510375395.8A patent/CN106322346B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0755104A (en) * | 1993-08-09 | 1995-03-03 | Ishikawajima Harima Heavy Ind Co Ltd | Starting method for hot-banked boiler |
| CN201748397U (en) * | 2010-08-12 | 2011-02-16 | 广州迪森热能技术股份有限公司 | Biomass boiler control system |
| DE102011009243A1 (en) * | 2011-01-24 | 2012-07-26 | Joachim Kümmel | Method for preventing bumping in fluidized bed immersion heating surfaces at high steam generator, involves setting operating pressure of steam boiler to specific value so that high pressure steam is injected from auxiliary boiler |
| CN202432501U (en) * | 2011-12-20 | 2012-09-12 | 郑州智慧通测控技术有限公司 | Steam boiler controller and hot water boiler controller |
| CN103423728A (en) * | 2013-08-13 | 2013-12-04 | 南京钢铁股份有限公司 | Boiler thermal state sliding-parameter shutdown method |
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