CN106642062A - Beryllium oxide generation preventing method for boilers of power plant - Google Patents
Beryllium oxide generation preventing method for boilers of power plant Download PDFInfo
- Publication number
- CN106642062A CN106642062A CN201611142669.XA CN201611142669A CN106642062A CN 106642062 A CN106642062 A CN 106642062A CN 201611142669 A CN201611142669 A CN 201611142669A CN 106642062 A CN106642062 A CN 106642062A
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- China
- Prior art keywords
- boiler
- boilers
- temperature
- water
- beryllium oxide
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/107—Protection of water tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/107—Protection of water tubes
- F22B37/108—Protection of water tube walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
Abstract
The invention discloses a beryllium oxide generation preventing method for boilers of a power plane, and the method can effectively avoid dry burning of heated surfaces. The method includes the following steps that firstly, a deaerator is heated, specifically, auxiliary steam is used for heating the deaerator, the heat source can increase the water temperature of the deaerator to 160 DEG C, and the temperature of a start-up separator outlet (or a steam pocket) of the corresponding boiler reaches 75 DEG C or above; secondly, feed water is heated, specifically, feed water heaters for starting of a unit are added through technical transformation or unit high-pressure heaters are directly selected, a steam source is taken from an adjacent unit and connected into the heaters, the feed water temperature is increased to a larger extent, the steam production amount is increased, the temperatures of the heated surfaces are greatly increased, the hearth temperature is increased, and the combustion condition in the ignition preliminary stage of the boilers is greatly improved; and thirdly, water is fed to the boilers till start-up separators encounter water, all drainage and vent valves of the boilers are closed, a steam turbine vacuum pump is started, and high-pressure bypass boilers and low-pressure bypass boilers are started and vacuumized.
Description
Technical field
The present invention relates to a kind of method for preventing beryllium oxide from generating for power plant boiler.
Background technology
Coal-burning power plant's unit starts every time fuel consumption amount greatly, substantially in 50-100 tons.It is most of to save start-up cost
Power plant has carried out technological transformation to reduce fuel consumption, and the technology of employing is broadly divided into two classes：One is plasma ignition, two
It is micro- oil gun.Can start pulverized coal preparation system at the ignition of the boiler initial stage after transformation, by using coal-fired replacement fuel oil boiler liter is carried out
Temperature, boosting, but the two the drawbacks of it is also fairly obvious.After starting pulverized coal preparation system, boiler temperature jumps, but water-cooling wall heat absorption needs one
Without medium cooling in individual process, again boiler main, vapour system, cause each section of superheater, reheater dry combustion method, generate beryllium oxide.Work as pot
When stove just steams, vapor (steam) temperature is low, poor very big with mistake, reheat steam turbine set, and heating surface is caught a cold suddenly, is previously generated beryllium oxide direct
Come off, when beryllium oxide has accumulated more easy blocking heating surface piping, cause heating surface overtemperature, booster is caused when serious.
In addition beryllium oxide has severe toxicity, and chemical formula BeO has both sexes, both can and acid reaction, can be reacted with highly basic again.Oxidation
Beryllium is white powder, there is very high fusing point, and meeting hyperpyrexia can decompose, and can discharge high poison flue gas.Beryllium oxide has harm to water,
Undiluted or substantial amounts of product can not be allowed to contact underground water, water channel or sewerage, if anarchy license, also will must not aoxidize
Beryllium enters surrounding environment.Therefore the face dry combustion method that how to keep from heat is studied, preventing the generation of beryllium oxide becomes very urgent.
The content of the invention
The technical problem to be solved in the present invention be to provide it is a kind of can be prevented effectively from heating surface dry combustion method for power plant pot
The method for preventing beryllium oxide generation of stove.
To solve above-mentioned technical problem, the technical scheme that the present invention is provided is：A kind of anti-block for power plant boiler
Change the method that beryllium is generated, it comprises the steps：
The first step, oxygen-eliminating device heating：Stripping is supplied supplemented by oxygen-eliminating device heating, and this thermal source can be by oxygen-eliminating device water temp. heating to 160 DEG C, phase
Answer boiler startup separator outlet（Or drum）Temperature reaches more than 75 DEG C；
Second step, feedwater heating：Unit starting feed-water heater is increased by technological transformation or directly selects unit height to add, from
Vapour source being taken as the occasion requires and accessing heater, more improve feed temperature, increase steam production, each heating surface temperature is greatly improved, carried
Blast furnace bore temperature, greatly improves ignition of the boiler initiation combustion condition；
3rd step, boiler water filling closes all hydrophobic, the emptying valves of boiler to separator water breakthrough is started, and starts steam turbine vacuum
Pump, opens high and low other machine stove and vacuumizes in the lump.
Preferably, if worrying that start progress does not catch up with the 3rd step, can first extraction turbine vacuum, wait startup separator
High and low side is then turned on after water breakthrough and takes out boiler vacuum.
Preferably, corresponding boiler startup separator outlet in the first step（Or drum）Temperature range is 85-95 DEG C.
Preferably, when unit is just grid-connected, when denitration reactor inlet temperature reaches 290 DEG C, starting to throw denitration.
After said structure, the present invention has the advantages that：By heating to oxygen-eliminating device, feeding water during boiler water filling
Heating improves feed temperature, exports boiler startup separator temperature（Or drum）Temperature reaches more than 75 DEG C.Then start true
Empty pump, opens high and low side and boiler is evacuated to more than -60kpa, and more than 75 DEG C of water will be vaporized into this understanding steam,
Continue to heat feedwater to increase steam production, steam will along steam flow through it is each cross hot vapour, then reheating is entered by height side
Device system.Whole boiler heating surface has just all been heated so before ignition of the boiler, and fire box temperature is raised, and improves coal dust fire bar
Part, while the oxygen in heating surface also can be taken away by vavuum pump, it is to avoid heating surface dry combustion method has simultaneously completely cut off oxygen, effectively anti-block
Change beryllium production.
The method that the invention also relates to improves each section of flue temperature of boiler, additionally obtains another benefit, that is, work as machine
When group is just grid-connected, denitration reactor inlet temperature can reach 290 DEG C or so, can start to throw denitration, NOX in grid-connected a hour
Emission can be up to standard, realizes that full load section throws denitration, performs meritorious deeds never to be obliterated to obtaining environmentally friendly valence compensation.
In sum, the invention provides a kind of preventing for power plant boiler that can be prevented effectively from heating surface dry combustion method
The method that beryllium oxide is generated.
Description of the drawings
Fig. 1 be in the present invention be used for power plant boiler prevent beryllium oxide generate method schematic flow sheet.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail.
With reference to accompanying drawing 1, a kind of method for preventing beryllium oxide from generating for power plant boiler, it comprises the steps：
The first step, oxygen-eliminating device heating：Stripping is supplied supplemented by oxygen-eliminating device heating, and this thermal source can be by oxygen-eliminating device water temp. heating to 160 DEG C, phase
Answer boiler startup separator outlet（Or drum）Temperature reaches more than 75 DEG C；
Second step, feedwater heating：Unit starting feed-water heater is increased by technological transformation or directly selects unit height to add, from
Vapour source being taken as the occasion requires and accessing heater, more improve feed temperature, increase steam production, each heating surface temperature is greatly improved, carried
Blast furnace bore temperature, greatly improves ignition of the boiler initiation combustion condition；
3rd step, boiler water filling closes all hydrophobic, the emptying valves of boiler to separator water breakthrough is started, and starts steam turbine vacuum
Pump, opens high and low other machine stove and vacuumizes in the lump.
Preferably, if worrying that start progress does not catch up with the 3rd step, can first extraction turbine vacuum, wait startup separator
High and low side is then turned on after water breakthrough and takes out boiler vacuum.
Preferably, corresponding boiler startup separator outlet in the first step（Or drum）Temperature range is 85-95 DEG C.
Preferably, when unit is just grid-connected, when denitration reactor inlet temperature reaches 290 DEG C, starting to throw denitration.
After said structure, the present invention has the advantages that：By heating to oxygen-eliminating device, feeding water during boiler water filling
Heating improves feed temperature, exports boiler startup separator temperature（Or drum）Temperature reaches more than 75 DEG C.Then start true
Empty pump, opens high and low side and boiler is evacuated to more than -60kpa, and more than 75 DEG C of water will be vaporized into this understanding steam,
Continue to heat feedwater to increase steam production, steam will along steam flow through it is each cross hot vapour, then reheating is entered by height side
Device system.Whole boiler heating surface has just all been heated so before ignition of the boiler, and fire box temperature is raised, and improves coal dust fire bar
Part, while the oxygen in heating surface also can be taken away by vavuum pump, it is to avoid heating surface dry combustion method has simultaneously completely cut off oxygen, effectively anti-block
Change beryllium production.
The present invention and embodiments thereof are described above, the description does not have restricted, shown in accompanying drawing also only
It is one of embodiments of the present invention, actual structure is not limited thereto.If the generally speaking ordinary skill people of this area
Member is enlightened by it, similar to the technical scheme without designing for creativeness in the case of without departing from the invention objective
Frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (4)
1. it is a kind of for power plant boiler prevent beryllium oxide generate method, it is characterised in that：It comprises the steps：
The first step, oxygen-eliminating device heating：Stripping is supplied supplemented by oxygen-eliminating device heating, and this thermal source can be by oxygen-eliminating device water temp. heating to 160 DEG C, phase
Answer boiler startup separator outlet（Or drum）Temperature reaches more than 75 DEG C；
Second step, feedwater heating：Unit starting feed-water heater is increased by technological transformation or directly selects unit height to add, from
Vapour source being taken as the occasion requires and accessing heater, more improve feed temperature, increase steam production, each heating surface temperature is greatly improved, carried
Blast furnace bore temperature, greatly improves ignition of the boiler initiation combustion condition；
3rd step, boiler water filling closes all hydrophobic, the emptying valves of boiler to separator water breakthrough is started, and starts steam turbine vacuum
Pump, opens high and low other machine stove and vacuumizes in the lump.
2. it is according to claim 1 for power plant boiler prevent beryllium oxide generate method, it is characterised in that：3rd
If worrying that start progress does not catch up with step, can first extraction turbine vacuum, wait being then turned on high and low side after startup separator water breakthrough and take out
Boiler vacuum.
3. it is according to claim 1 for power plant boiler prevent beryllium oxide generate method, it is characterised in that：First
Corresponding boiler startup separator outlet in step（Or drum）Temperature range is 85-95 DEG C.
4. it is according to claim 1 for power plant boiler prevent beryllium oxide generate method, it is characterised in that：Work as machine
When group is just grid-connected, when denitration reactor inlet temperature reaches 290 DEG C, start to throw denitration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142669.XA CN106642062A (en) | 2016-12-13 | 2016-12-13 | Beryllium oxide generation preventing method for boilers of power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142669.XA CN106642062A (en) | 2016-12-13 | 2016-12-13 | Beryllium oxide generation preventing method for boilers of power plant |
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| CN106642062A true CN106642062A (en) | 2017-05-10 |
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| CN201611142669.XA Pending CN106642062A (en) | 2016-12-13 | 2016-12-13 | Beryllium oxide generation preventing method for boilers of power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270274A (en) * | 2017-07-10 | 2017-10-20 | 江苏大唐国际吕四港发电有限责任公司 | The new Starting mode of ultra-supercritical coal-fired units realizes that the denitration of unit full load is put into |
| CN110767325A (en) * | 2019-10-31 | 2020-02-07 | 中国科学院合肥物质科学研究院 | Method for realizing fusion reactor plasma core charging by using sandwich shot |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2849083B2 (en) * | 1996-11-14 | 1999-01-20 | ハドソン・プロダクツ・コーポレイション | Integrated deaerator for heat pipe steam condenser |
| CN202613414U (en) * | 2012-04-17 | 2012-12-19 | 中国轻工业长沙工程有限公司 | Boiler fire making and steam exhaust utilization system in thermal power plant |
| CN103438473A (en) * | 2013-08-07 | 2013-12-11 | 华电电力科学研究院 | 300MW furnace bottom heating and tiny-oil igniting combination type and no-neighboring-furnace powder conveyance unit starting method |
| CN103712197A (en) * | 2013-12-27 | 2014-04-09 | 冯伟忠 | Energy-saving type quick start method for supercritical unit or ultra-supercritical unit |
-
2016
- 2016-12-13 CN CN201611142669.XA patent/CN106642062A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2849083B2 (en) * | 1996-11-14 | 1999-01-20 | ハドソン・プロダクツ・コーポレイション | Integrated deaerator for heat pipe steam condenser |
| CN202613414U (en) * | 2012-04-17 | 2012-12-19 | 中国轻工业长沙工程有限公司 | Boiler fire making and steam exhaust utilization system in thermal power plant |
| CN103438473A (en) * | 2013-08-07 | 2013-12-11 | 华电电力科学研究院 | 300MW furnace bottom heating and tiny-oil igniting combination type and no-neighboring-furnace powder conveyance unit starting method |
| CN103712197A (en) * | 2013-12-27 | 2014-04-09 | 冯伟忠 | Energy-saving type quick start method for supercritical unit or ultra-supercritical unit |
Non-Patent Citations (1)
| Title |
|---|
| 许毓斌: "火电机组启停过程中节能优化研究及风险控制", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270274A (en) * | 2017-07-10 | 2017-10-20 | 江苏大唐国际吕四港发电有限责任公司 | The new Starting mode of ultra-supercritical coal-fired units realizes that the denitration of unit full load is put into |
| CN107270274B (en) * | 2017-07-10 | 2021-12-14 | 江苏大唐国际吕四港发电有限责任公司 | Novel starting mode of ultra-supercritical coal-fired unit realizes unit full-load denitration input |
| CN110767325A (en) * | 2019-10-31 | 2020-02-07 | 中国科学院合肥物质科学研究院 | Method for realizing fusion reactor plasma core charging by using sandwich shot |
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Application publication date: 20170510 |