CN205235724U - System for be used for improving siemens 1000MW600MW ultra supercritical unit denitration rate of putting into operation - Google Patents
System for be used for improving siemens 1000MW600MW ultra supercritical unit denitration rate of putting into operation Download PDFInfo
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- CN205235724U CN205235724U CN201521096641.8U CN201521096641U CN205235724U CN 205235724 U CN205235724 U CN 205235724U CN 201521096641 U CN201521096641 U CN 201521096641U CN 205235724 U CN205235724 U CN 205235724U
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Abstract
The utility model discloses a system for be used for improving siemens 1000MW600MW ultra supercritical unit denitration rate of putting into operation, including denitrification facility, boiler, high pressure cylinder and high pressure feed water heater, when unit low load operation, high pressure feed water heater's the hot -water heating vapour source of giving is 0 section steam bleeding system by the former 1 section switching of drawing gas, 0 the section steam bleeding system include: mend from the high pressure cylinder that vapour import department is reverse takes steam out, draw gas behind electric brake valve, pneumatic check valve, get into the steam desuperrheater and subtract temperature, decompression with adaptation high pressure feed water heater's safety with give the requirement of temperature, subtract temperature, decompression back steam and divide A, two B and insert 1A, 1B high pressure feed water heater respectively through the electric brake valve, the system is provided with hydrophobic pipeline according to the pipe arrangement condition and operation operation requirement. The utility model provides a low limited problem of load condition denitration of siemens 1000MW600MW ultra supercritical unit, and the simply easy operation of system is to the current structural modification of unit is little, the investment is low.
Description
Technical field
The utility model relates to denitration technology field, coal-burning power plant, relates in particular to a kind of for improving SiemensThe system of 1000MW/600MW ultra supercritical unit denitration operational percentage.
Background technology
At present, coal-burning power plant's denitrification apparatus is mostly SCR class, and the catalyst of employing is commonOperating temperature range is 300-400 DEG C, exceedes temperature range catalyst and can not bring into play due effect.In conventional thermal power plant design, there are the following problems in meeting: in the time that unit load is higher, and denitrification apparatus import cigaretteTemperature (economizer exit cigarette temperature) is just in time in the normal range of operation of catalyst; And in the time that unit load is lower,Denitrification apparatus import cigarette temperature is lower, lower than the normal serviceability temperature of catalyst. This be because, if low negativeWhen lotus, the juice import cigarette temperature of establishing of denitrification apparatus is brought up to the service requirement that meets catalyst, at high load capacityTime cigarette Wen Huigeng high, thereby cause exhaust gas temperature to raise, the economy of unit is reduced. Therefore, generalIn situation, all design by meeting lower exhaust gas temperature when the high load capacity, this will cause power plant lowWhen load, denitrification apparatus off-the-line can only be moved. This has been not suitable with up-to-date power plant's discharged nitrous oxides markAccurate requirement.
Fired power generating unit steam turbine side water supply heat back system mates with economizer exit cigarette temperature (denitrification apparatus entrance)Design, in the time that unit load is lower, its feed temperature is also corresponding lower. Existing Siemens1000MW/600MW ultra supercritical unit water supply heat back system all, according to mentioned above principle design, faces unitWhen underrun, because feed temperature low (economizer exit cigarette temperature is low) causes denitrification apparatus to exit fortuneThe problem of row.
Utility model content
It is a kind of super for improving Siemens 1000MW/600MW that the purpose of this utility model is to provideThe system of critical unit denitration operational percentage, this system is simple to operation, and little to the change of unit existing structure,Invest low.
In order to solve the problem of above-mentioned technology, the technical solution adopted in the utility model is: one is used for carryingThe system of high Siemens 1000MW/600MW ultra supercritical unit denitration operational percentage, comprise denitrification apparatus,Boiler, high pressure cylinder and high-pressure heater, in the time of performing low-load running of machine set, the feedwater of high-pressure heater addsHot vapour source draws gas and switches to 0 section of steam bleeding system by former 1 section, and described 0 section of steam bleeding system comprises: from high pressureCylinder filling import department oppositely extracts steam out, draws gas after electric gate valve, Pneumatic check valve, enters steam and subtractsTemperature device carries out desuperheat, decompression to adapt to the safety of high-pressure heater and the requirement to water temperature, desuperheat, decompressionRear steam divides A, two of B and accesses respectively 1A, 1B high-pressure heater through electric gate valve, described system rootAccording to pipe arrangement situation and operation requirement, be provided with hydrophobic pipeline.
Further, between described Pneumatic check valve and steam temp lowering device, be provided with pneumatic control valve.
Further, desuperheating water is drawn from reheater warm water is female, after hand stop valve, filter,Carry out Flow-rate adjustment by main other two-way control valve group, and then merge into mother and after non-return valve, spray into steamingVapour attemperator, described desuperheating water master, bypass valve group are respectively by 1 pneumatic stopping valve, 1 pneumatic tuneJoint valve and 1 hand stop valve composition.
Further, on described steam temp lowering device, be provided with safety valve.
Further, on the pipeline between described aeration valve and electric gate valve, be provided with hydrophobic pipeline, described inOn pipeline between electric gate valve and Pneumatic check valve, be provided with hydrophobic pipeline, described steam temp lowering device is with highPress on the pipeline between heater and be provided with hydrophobic pipeline.
The utility model based on principle be: by improving the feed temperature of running on the lower load pusher side so thatThe corresponding raising of boiler economizer outlet cigarette temperature, thus reach the object that improves denitrification apparatus operational percentage.
The utility model provide for improving the denitration of Siemens 1000MW/600MW ultra supercritical unitThe system of operational percentage is to increase drawing gas of a road high parameter to high-pressure heater to add hot vapour source, and take from this vapour sourceThe original filling import of unit high pressure cylinder, it has former the drawing gas of higher pressure heater and adds the ginseng that hot vapour source is higherNumber. In the time of performing low-load running of machine set, the feedwater of high-pressure heater adds hot vapour source and draws gas and switch to 0 by former 1 sectionSection is drawn gas (newly-increased systematic naming method is 0 section and draws gas), thereby feed temperature is improved, to adapt to denitrationThe device needs that put into operation. 0 section of steam bleeding system comprises: from high pressure cylinder filling, import department oppositely extracts steam out (nowFilling valve in closed condition with isolation main steam), draw gas after electric gate valve, Pneumatic check valve, enterPneumatic control valve and steam temp lowering device (band safety valve is in case system overpressure) carry out desuperheat, decompression to adapt toThe safety of high-pressure heater and feedwater temperature rise requirement, after desuperheat, decompression, steam divides A, two of B and through electronicGate valve accesses respectively 1A high-pressure heater and 1B high-pressure heater, and system is according to pipe arrangement situation and fortuneLine operate requirement, arranges necessary hydrophobic pipeline.
Desuperheating water is drawn from reheater desuperheat jellyfish pipe (taking from heat pump centre tap), through hand stop valve,After filter, for making spray water flux meet 0 section of requirement of drawing gas, undertaken by master, other two-way control valve groupFlow-rate adjustment, and then merge into female pipe, and after non-return valve, spray into attemperator. Desuperheating water master, bypassControl valve group is made up of 1 hand stop valve after 1 pneumatic stopping valve, 1 pneumatic control valve respectively.
It is de-that the utility model has solved Siemens 1000MW/600MW ultra supercritical unit running on the lower loadThe problem that nitre is limited, and system is simple to operation, to unit existing structure change little, invest low.
The utility model also can be used for newly-built Turbo-generator Set,, in the time that water supply heat back system designs, protectsHold the unit parameter constant (the best that maintains unit economy draw gas parameter) that normally draws gas, add to high pressure simultaneouslyHot device is set up the vapour source of drawing gas for subsequent use of a road high parameter, to meet denitration requirement under unit running on the lower load.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application'sA part, does not form to improper restriction of the present utility model, in the accompanying drawings:
Fig. 1 is that the one of the utility model embodiment 1 is super for improving Siemens 1000MW/600MWThe schematic diagram of supercritical unit denitration operational percentage, wherein cloud atlas region is the utility model part, 0 sectionSteam bleeding system.
Fig. 2 is 0 section of steam bleeding system flow chart of the utility model embodiment 1.
Fig. 3 is that the one of the utility model embodiment 2 is super for improving Siemens 1000MW/600MWThe schematic diagram of supercritical unit denitration operational percentage, wherein cloud atlas region is the utility model part, 0 sectionSteam bleeding system.
Fig. 4 is 0 section of steam bleeding system flow chart of the utility model embodiment 2.
In accompanying drawing, 1 is that the original filling valve of unit, 2 is that pipeline hydrophobic pipeline after filling valve, 3 is electric brakeValve, 4 is that after electric gate valve, pipeline hydrophobic pipeline, 5 is for pneumatic control valve, 7 for Pneumatic check valve, 6Steam temp lowering device, 8 is that safety valve, 9 is that pipeline hydrophobic pipeline after attemperator, 10 is electric gate valve, 11For electric gate valve, 12 is that flowmeter, 13 is that hand stop valve, 14 is that filter, 15 is pneumatic cut-offValve, 16 be pneumatic control valve, 17 for hand stop valve, 18 for non-return valve, 19 for pneumatic stopping valve,20 is that pneumatic control valve, 21 is hand stop valve.
Detailed description of the invention
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, new in this this practicalityThe illustrative examples of type and explanation are used for explaining the utility model, but not as to the utility modelRestriction.
Embodiment 1
As shown in Figure 1, 2, one is used for improving the denitration of Siemens 1000MW/600MW ultra supercritical unitThe system of operational percentage, comprises denitrification apparatus, boiler, high pressure cylinder and high-pressure heater, bears when unit is lowWhen lotus operation, the feedwater of high-pressure heater adds hot vapour source draws gas and switches to 0 section of steam bleeding system by former 1 section, newThe 0 section of flow process of drawing gas increasing is: (now filling valve no longer oppositely to extract steam out from high pressure cylinder filling import departmentNeed to utilize its original function), in the present embodiment, filling valve, as pneumatil control valve, draws gas through electric gate valve3, after pneumatic check-valves 5, enter steam temp lowering device 7 (band safety valve 8 in case system overpressure) carry out desuperheat,Decompression is to adapt to safety and the feedwater temperature rise requirement of high-pressure heater, and after desuperheat, decompression, steam divides A, B twoZhi Bingjing electric gate valve 10 and electric gate valve 11 access respectively 1A high-pressure heater and 1B high-pressure heater, areSystem, according to pipe arrangement situation and operation requirement, arranges necessary hydrophobic pipeline, as in figure 2,4 and 9.When unit meets when lower, drawn gas and switch to 0 section and draw gas by former 1 section in the vapour source of high-pressure heater, fromAnd improve pusher side feed temperature, to meet denitrification apparatus inlet flue gas temperature requirement (boiler economizer outlet cigarette temperature).
0 section of steam bleeding system desuperheating water flow process is: desuperheating water is drawn from feed pump reheater desuperheat jellyfish pipe, warpAfter flowmeter 12, hand stop valve 13 and filter 14, point master, other two-way control valve group are carried out flow tuneJoint (opening again bypass valve group in the time of the discontented traffic requirement of main road), and then merge into female pipe, and through contraryOnly after valve 18, spray into steam temp lowering device. Main (side) road control valve group respectively by pneumatic stopping valve 15,19,Pneumatic control valve 16,20 and hand stop valve 17,21 compositions.
Embodiment 2
With reference to accompanying drawing 3,4,0 section of newly-increased flow process of drawing gas is: from high pressure cylinder filling, import department oppositely extracts outSteam (now filling valve in closed condition with isolation main steam), draw gas through electric gate valve 3, pneumatic onlyReturn after valve 5, enter pneumatic control valve 6 and steam temp lowering device 7 (band safety valve 8 is in case system overpressure) and carry outDesuperheat, decompression to be to adapt to safety and the feedwater temperature rise requirement of high-pressure heater, after desuperheat, decompression steam divide A,Two of B also access respectively 1A high-pressure heater and 1B hyperbaric heating through electric gate valve 10 and electric gate valve 11Device, system, according to pipe arrangement situation and operation requirement, arranges necessary hydrophobic pipeline, as in figure 2,4 and 9. When unit meets when lower, drawn gas and switch to 0 section by former 1 section in the vapour source of No. 1 high-pressure heaterDraw gas, thereby improve pusher side feed temperature, to meet denitrification apparatus inlet flue gas temperature requirement (boiler economizerOutlet cigarette temperature).
0 section of steam bleeding system desuperheating water flow process is: desuperheating water is drawn from feed pump reheater desuperheat jellyfish pipe,After flowmeter 12, hand stop valve 13 and filter 14, point master, other two-way control valve group flowAmount regulates (in the time of the discontented traffic requirement of main road, opening bypass valve group) again, and then merges into female pipe,And spray into steam temp lowering device after non-return valve 18. Main (side) road control valve group is respectively by pneumatic stopping valve15 (19), pneumatic control valve 16 (20) and hand stop valve 17 (21) compositions.
The technical scheme above the utility model embodiment being provided is described in detail, and herein shouldWith principle and the embodiment of specific case to the utility model embodiment set forth, above realityExecute the principle that routine explanation is only applicable to help to understand the utility model embodiment; Meanwhile, for this areaThose skilled in the art, according to the utility model embodiment, in detailed description of the invention and range of applicationAll will change, in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. for improving a system for Siemens 1000MW/600MW ultra supercritical unit denitration operational percentage,Comprise denitrification apparatus, boiler, high pressure cylinder and high-pressure heater, it is characterized in that: bear when unit is lowWhen lotus operation, the feedwater of high-pressure heater adds hot vapour source draws gas and switches to 0 section of steam bleeding system by former 1 section,Described 0 section of steam bleeding system comprises: from high pressure cylinder filling, import department oppositely extracts steam out, draws gas through electronicAfter gate valve, Pneumatic check valve, enter steam temp lowering device and carry out desuperheat, decompression to adapt to high-pressure heaterSafety and give the requirement of water temperature, after desuperheat, decompression, steam divides A, two of B and divides through electric gate valveDo not access 1A, 1B high-pressure heater, described system is according to pipe arrangement situation and operation requirement,Be provided with hydrophobic pipeline.
2. one according to claim 1 is used for improving Siemens 1000MW/600MW ultra supercritical machineThe system of group denitration operational percentage, is characterized in that: between described Pneumatic check valve and steam temp lowering device, establishBe equipped with pneumatic control valve.
3. one according to claim 1 and 2 is used for improving that Siemens 1000MW/600MW is super facesThe system of boundary's unit denitration operational percentage, is characterized in that: desuperheating water is drawn from reheater warm water is female,After hand stop valve, filter, carry out Flow-rate adjustment by main other two-way control valve group, and thenMerge into mother and after non-return valve, spray into steam temp lowering device, described desuperheating water master, other control valve group are respectivelyFormed by 1 pneumatic stopping valve, 1 pneumatic control valve and 1 hand stop valve.
4. one according to claim 3 is used for improving Siemens 1000MW/600MW ultra supercritical machineThe system of group denitration operational percentage, is characterized in that: on described steam temp lowering device, be provided with safety valve.
5. one according to claim 1 is used for improving Siemens 1000MW/600MW ultra supercritical machineThe system of group denitration operational percentage, is characterized in that: described filling valve, electric gate valve, steam temp lowering deviceAfter be provided with hydrophobic pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096641.8U CN205235724U (en) | 2015-12-23 | 2015-12-23 | System for be used for improving siemens 1000MW600MW ultra supercritical unit denitration rate of putting into operation |
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| CN201521096641.8U CN205235724U (en) | 2015-12-23 | 2015-12-23 | System for be used for improving siemens 1000MW600MW ultra supercritical unit denitration rate of putting into operation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105435597A (en) * | 2015-12-23 | 2016-03-30 | 广东惠州平海发电厂有限公司 | System for improving denitration operation rate of Siemens 1000MW/600MW ultra-supercritical unit |
| CN106076117A (en) * | 2016-07-11 | 2016-11-09 | 浙江浙能技术研究院有限公司 | A kind of fired power generating unit efficient low-load denitrification apparatus and control method |
| CN114183744A (en) * | 2021-10-15 | 2022-03-15 | 华北电力科学研究院有限责任公司 | Wind heating safety control system |
-
2015
- 2015-12-23 CN CN201521096641.8U patent/CN205235724U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105435597A (en) * | 2015-12-23 | 2016-03-30 | 广东惠州平海发电厂有限公司 | System for improving denitration operation rate of Siemens 1000MW/600MW ultra-supercritical unit |
| CN106076117A (en) * | 2016-07-11 | 2016-11-09 | 浙江浙能技术研究院有限公司 | A kind of fired power generating unit efficient low-load denitrification apparatus and control method |
| CN106076117B (en) * | 2016-07-11 | 2018-09-25 | 浙江浙能技术研究院有限公司 | A kind of fired power generating unit efficient low-load denitrification apparatus and control method |
| CN114183744A (en) * | 2021-10-15 | 2022-03-15 | 华北电力科学研究院有限责任公司 | Wind heating safety control system |
| CN114183744B (en) * | 2021-10-15 | 2024-03-01 | 华北电力科学研究院有限责任公司 | Wind heating safety control system |
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