CN109404879A - A kind of small-sized DC boiler and its start and run water round-robin method - Google Patents
A kind of small-sized DC boiler and its start and run water round-robin method Download PDFInfo
- Publication number
- CN109404879A CN109404879A CN201811402985.5A CN201811402985A CN109404879A CN 109404879 A CN109404879 A CN 109404879A CN 201811402985 A CN201811402985 A CN 201811402985A CN 109404879 A CN109404879 A CN 109404879A
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- Prior art keywords
- water
- separation
- boiler
- steam
- attemperator
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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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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 238000007616 round robin method Methods 0.000 title claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 239000006200 vaporizer Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000008236 heating water Substances 0.000 abstract 1
- 238000002309 gasification Methods 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/12—Self-contained steam boilers, i.e. comprising as a unit the steam boiler, the combustion apparatus, the fuel storage, accessory machines and equipment
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
- F22G5/123—Water injection apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a kind of small-sized DC boiler and its water round-robin method is started and run, boiler includes vaporizer, combustion chamber, secondary furnace and back-end ductwork and feed pump, triple valve and separation attemperator etc..Triple valve is connected with economizer, convection bank and feed pump respectively.When boiler startup, after so that deaerated water is entered economizer heat exchange heating by feed pump, triple valve shunting is entered;A part of hot water returns to entrance of water-supplying pump and deaerated water together, reenters economizer heat exchange heating;Another part hot water enters convection bank and continues heat exchange heating.Hot water becomes steam water interface after convection bank exchanges heat, and so that steam water interface is entered separation attemperator, separation attemperator, which carries out vapor-liquid separation to steam water interface as steam-water separator, becomes vapor and hot water;Vapor after making separation, which enters superheater, which continues heating, becomes superheated steam.The present invention protects it from dew point corrosion using economizer heating water re-circulation, easy to operate, economical.
Description
Technical field
The present invention relates to a kind of small-sized DC boiler and its water round-robin method is started and run, belongs to field of combustion technology.
Background technique
Remote districts have inconvenient traffic or waterpower, wind-power electricity generation regional load unstable region, resident living power utility or small-sized
Electricity consumption needs to use small-sized movable electricity generation boiler.The emergency service under such as earthquake case of emergency is also required to movable fast-assembling simultaneously
Boiler.At this point, considering that the supply object of system is that resident living power utility or mini electrical equipment are powered, the power of unit should not be set
It sets too greatly, configuration power supply capacity is usually 500~6000KW.And not only need repair and maintenance simple, also want equipment fuel
Wide adaptability, can independent biological substance for combustion, can also be with the mixture of biological substance for combustion and coal, can also be individually coal-fired.
And the miniaturization of this electricity generation boiler, often make burning and boiler circuit space limited, it is difficult to completely using big
The mature technology of type station boiler, so that its steam/water circulating needs special consideration.
Summary of the invention
The purpose of the present invention is to provide a kind of small-sized DC boiler and its water round-robin method is started and run, it is especially suitable
In 2 ~ 4t/h of evaporation capacity and the small-sized movable electricity generation boiler of 1.25 ~ 3.82MPa of steam parameter.
The present invention is achieved through the following technical solutions:
A kind of small-sized DC boiler, vaporizer, combustion chamber, secondary furnace and back-end ductwork including horizontal alignment connection, the gas
Change the fire grate that room, combustion chamber and secondary furnace bottom are provided with stagger, and the secondary furnace bottom is above the fire grate
It is formed to the inclined chimney arch in the combustion chamber;The combustion chamber top is equipped with superheater, is provided with convection tube in the secondary furnace
Beam, the back-end ductwork are provided with economizer;
The boiler further includes that feed pump, triple valve and separation attemperator, the feed pump are connected with the economizer, and described three
Port valve is connected with economizer, convection bank and feed pump respectively;Separation attemperator setting is in the convection bank and described
Between superheater.
In above-mentioned technical proposal, the separation attemperator is provided with temperature control device;And the separation attemperator is given with described
Connecting tube is provided between water pump.
In above-mentioned technical proposal, there is connecting pipe respectively between the triple valve and the convection bank, the feed pump,
Flow control valve is provided in the connecting pipe.
In above-mentioned technical proposal, the boiler further includes oxygen-eliminating device;The oxygen-eliminating device and the feed pump have feedwater piping
It is connected.
A kind of water round-robin method that small-sized DC boiler operates normally, which comprises
Enter deaerated water after economizer heat exchange heating becomes hot water by feed pump as working medium, is entered pair by triple valve
Flowing bundle, which continues heat exchange heating, becomes vapor;
So that vapor is entered superheater by separation attemperator and continues heating as superheated steam;Superheated steam is for power generation or directly
It uses.
In above-mentioned technical proposal, when the steam temperature is excessively high, the separation attemperator subtracts as attemperator penetrating
Warm water enters back into superheater and continues heating as superheated steam after reducing steam temperature;Superheated steam is for power generation or directly
It uses.
A kind of water round-robin method of small-sized DC boiler startup, which comprises
Make deaerated water as working medium by feed pump enter economizer heat exchange heating become hot water after, enter triple valve shunting;
A part of hot water, which is split, returns to entrance of water-supplying pump and deaerated water together, reenters economizer heat exchange heating;Another part heat
Water be split enter convection bank continue heat exchange heating;
Hot water becomes steam water interface after convection bank exchanges heat, and the steam water interface is made to enter separation attemperator, described
Attemperator is separated as steam-water separator, vapor-liquid separation is carried out as vapor and hot water to the steam water interface;After making separation
Vapor enter superheater continue heating become superheated steam;Superheated steam is used for power generation or directly.
In above-mentioned technical proposal, make the separation attemperator will be under steam water interface separation as steam-water separator
Hot water returns to the entrance of water-supplying pump, and reentering economizer heat exchange heating together as working medium with deaerated water becomes hot water, ginseng
With steam/water circulating.
The present invention has the following advantages and beneficial effects: in such a way that economizer heat-exchanging water recirculates, protection saves coal
Device avoids during boiler startup working medium coolant-temperature gage is too low from causing dew point corrosion, structure and easy to operate, economical and practical;Water circulation
All using direct current mode, the safety of boiler circuit and flue gas system heat exchange and flowing ensure that in very low height.
Detailed description of the invention
Fig. 1 is a kind of small-sized DC boiler schematics according to the present invention.
In figure: 1- feeder;2- vaporizer;The combustion chamber 3-;4- secondary furnace;5- fire grate;6- grate wind chamber;7-
Back-end ductwork;8- superheater;9- separates attemperator;10- slag bath;11- convection bank;12- oxygen-eliminating device;13- feed pump;
14- economizer;15- triple valve.
Specific embodiment
A specific embodiment of the invention and the course of work are further described with reference to the accompanying drawing.
The positional terms such as the upper, lower, left, right, front and rear in present specification be positional relationship based on the figure and
It establishes.Attached drawing is different, then corresponding positional relationship is also possible to change therewith, therefore cannot be interpreted as with this to protection model
The restriction enclosed.
As shown in Figure 1, a kind of small-sized DC boiler, vaporizer 2, combustion chamber 3, secondary furnace 4 including horizontal alignment connection
It further include feed pump 13, triple valve 15 and separation attemperator 9 with back-end ductwork 7.Feeder 1 is provided at the top of vaporizer 2.Into
Glassware 1 is using sealing charging.2 lower part of vaporizer is provided with gasifying agent pipe, for being passed through the gasification such as air, oxygen or vapor
Agent.Refractory material is arranged in 2 inner wall of vaporizer, forms insulation furnace wall, so that vaporizer 2 is formed accumulation of heat gasification, reduces gasification temperature.
Vaporizer 2, combustion chamber 3 and 4 bottom of secondary furnace are provided with the fire grate 5 of stagger, and 5 bottom of fire grate is provided with furnace
Exhaust air box 6.Fire grate 5 arranges that inclination angle is less than 15 ° along material direction of travel diagonally downward.It is logical that blanking is arranged in 5 end of fire grate
Road, blanking channel bottom are arranged in slag bath 10.4 bottom of secondary furnace is formed above fire grate 5 to the inclined chimney arch in combustion chamber 3.
Fuel enters in vaporizer 2 from feeder 1 is sealed, gasifies in 2 accumulation of heat of vaporizer and generates gasification gas and gasification
Residue, gasification gas enter combustion chamber 3, and the oxidant burning being passed through with combustion chamber 3 generates high-temperature flue gas.The gas of 2 lower section of vaporizer
Change residue to continue to gasify with the gasifying agent effect being passed through from the grate wind chamber 6 of 5 bottom of fire grate on fire grate 5, forward with fire grate 5
It gradually burns in progradation, and is finally reached after-flame.The high-temperature flue gas generated that burns also enters burning under the water conservancy diversion of chimney arch
Room 3.
3 top of combustion chamber is equipped with superheater 8, and high-temperature flue gas exchanges heat with superheater 8 first, subsequently into secondary furnace 4.After-flame
Convection bank 11 is provided in room 4, the outlet of convection bank 11 is connected with attemperator 9 is separated.Economizer is provided in back-end ductwork 7
14.Enter back-end ductwork 7 after exchanging heat into the flue gas of secondary furnace 4 and convection bank 11 and economizer 14 exchanges heat.
Feed pump 13 is connected with economizer 14, and triple valve 15 is connected with economizer, convection bank 11 and feed pump 13 respectively.
There is connecting pipe between triple valve 15 and convection bank 11, feed pump 13 respectively, is provided with flow control valve in connecting pipe.
It separates attemperator 9 to be arranged between convection bank 11 and superheater 8,8 entrance of superheater is connected with attemperator 9 is separated.
Separation attemperator 9 is provided with temperature control device;And connecting tube is provided between separation attemperator 9 and feed pump 13.
Boiler further includes oxygen-eliminating device 12, and oxygen-eliminating device 12 has feedwater piping to be connected with feed pump 13.
When boiler operates normally, deaerated water is persistently supplemented by feed pump 13;
Make deaerated water as working medium by feed pump 13 enter economizer 14 heat exchange heating become hot water after, by triple valve 15 into
Enter to convection bank 11 and continues heat exchange heating as vapor;
So that vapor is continued heating into superheater 8 by separation attemperator 9 becomes superheated steam.At this point, separation attemperator 9 is made
For a channel.
When steam temperature is excessively high, separation attemperator 9 sprays into desuperheating water as attemperator, after reducing steam temperature
It enters back into superheater 8 and continues heating as superheated steam.The temperature control device of separation attemperator 9 is used not only for regulation separation attemperator
Vapor (steam) temperature is also fed back to control system, is used for regulating flow regulating valve by 9 spray desuperheating.
When boiler startup,
So that deaerated water is entered the heat exchange of economizer 14 heating as after hot water by feed pump 13 as working medium, enters triple valve
15.To avoid in economizer Temperature of Working is too low from causing dewing corrosion, a part of hot water be split return 13 entrance of feed pump and
The deaerated water persistently supplemented together, reenters the heat exchange heating of economizer 14, improves the heat-exchange working medium temperature of economizer 14;It is another
Part hot water be split enter convection bank 11 continue heat exchange heating;
Hot water becomes steam water interface after the heat exchange of convection bank 11, so that steam water interface is entered separation attemperator 9, separation subtracts
Warm device 9, which carries out vapor-liquid separation to steam water interface as steam-water separator, becomes vapor and hot water;Vapor after making separation
Continuing heating into superheater 8 becomes superheated steam.
The hot water separated under attemperator 9 separates steam water interface as steam-water separator is set to return to water supply by connecting tube
13 entrances are pumped, economizer heat exchange is reentered together as working medium with deaerated water and heats up, continue to participate in steam/water circulating.
The outlet of superheater 11 is connected with steam turbine, and superheated steam is supplied steam turbine power generation.Steam exhaust after steam turbine power generation
It exchanges heat by condenser and returns to 12 boiler of feeding of oxygen-eliminating device after further cooling down and use.Superheated steam can also directly make for technique
With oxygen-eliminating device 12 is supplemented by boiler feedwater at this time.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of small-sized DC boiler, which is characterized in that
The boiler includes vaporizer (2), combustion chamber (3), secondary furnace (4) and the back-end ductwork (7) of horizontal alignment connection, described
Vaporizer (2), combustion chamber (3) and secondary furnace (4) bottom are provided with the fire grate (5) of stagger, and the secondary furnace (4) bottom
Portion is formed above the fire grate (5) to the combustion chamber (3) inclined chimney arch;Combustion chamber (3) top is equipped with superheater
(8), it is provided with convection bank (11) in the secondary furnace (4), the back-end ductwork (7) is provided with economizer (14);
The boiler further includes feed pump (13), triple valve (15) and separation attemperator (9), the feed pump (13) and the province
Coal device (14) is connected, and the triple valve (15) is connected with economizer, convection bank (11) and feed pump (13) respectively;The separation
Attemperator (9) is arranged between the convection bank (11) and the superheater (8).
2. a kind of small-sized DC boiler according to claim 1, which is characterized in that the separation attemperator (9) is provided with
Temperature control device;And connecting tube is provided between the separation attemperator (9) and the feed pump (13).
3. a kind of small-sized DC boiler according to claim 1, which is characterized in that the triple valve (15) and the convection current
There is connecting pipe respectively between tube bank (11), the feed pump (13), is provided with flow control valve in the connecting pipe.
4. a kind of small-sized DC boiler according to claim 1, which is characterized in that the boiler further includes oxygen-eliminating device
(12);The oxygen-eliminating device (12) has feedwater piping to be connected with the feed pump (13).
5. the water round-robin method that a kind of small-sized DC boiler operates normally, using as described in claim 1 a kind of small-sized straight
Flow boiler, which is characterized in that the described method includes:
So that deaerated water is entered economizer (14) heat exchange heating as after hot water by feed pump (13) as working medium, passes through triple valve
(15) it enters convection bank (11) and continues heat exchange heating as vapor;
So that vapor is entered superheater (8) by separation attemperator (9) and continues heating as superheated steam.
6. a kind of water round-robin method of small-sized DC boiler according to claim 5, which is characterized in that the method is also wrapped
Include: when the steam temperature is excessively high, the separation attemperator (9) sprays into desuperheating water as attemperator, makes steam temperature
Superheater (8) is entered back into after reduction continues heating as superheated steam.
7. a kind of water round-robin method of small-sized DC boiler startup uses a kind of small-sized DC pot as described in claim 1
Furnace, which is characterized in that the described method includes:
So that deaerated water is entered economizer (14) heat exchange heating as after hot water by feed pump (13) as working medium, enters threeway
Valve (15) shunts;A part of hot water, which is split, returns to feed pump (13) entrance and deaerated water together, reenters economizer (14)
Heat exchange heating;Another part hot water be split enter convection bank (11) continue heat exchange heating;
Hot water becomes steam water interface after convection bank (11) exchange heat, and the steam water interface is made to enter separation attemperator
(9), the separation attemperator (9), which carries out vapor-liquid separation to the steam water interface as steam-water separator, becomes vapor and heat
Water;Vapor after making separation, which enters superheater (8), which continues heating, becomes superheated steam.
8. a kind of water round-robin method of small-sized DC boiler startup according to claim 7, which is characterized in that the method
Further include: the hot water under separating separation attemperator (9) by the steam water interface as steam-water separator returns to described
Feed pump (13) entrance, reentering economizer heat exchange heating together as working medium with deaerated water becomes hot water.
Priority Applications (1)
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CN201811402985.5A CN109404879A (en) | 2018-11-23 | 2018-11-23 | A kind of small-sized DC boiler and its start and run water round-robin method |
Applications Claiming Priority (1)
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CN201811402985.5A CN109404879A (en) | 2018-11-23 | 2018-11-23 | A kind of small-sized DC boiler and its start and run water round-robin method |
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Family
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CN2725714Y (en) * | 2004-09-07 | 2005-09-14 | 长葛市开元锅炉有限责任公司 | Energy-saving environment protection boiler |
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CN103836612A (en) * | 2014-02-28 | 2014-06-04 | 北京热华能源科技有限公司 | Superheated steam boiler of horizontal circulating fluidizing bed |
CN104728826A (en) * | 2015-03-19 | 2015-06-24 | 中国华能集团清洁能源技术研究院有限公司 | Constant temperature economizer |
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CN107388578A (en) * | 2017-08-31 | 2017-11-24 | 北京环清环境科技有限公司 | A kind of hot-blast stove |
CN108644779A (en) * | 2018-07-17 | 2018-10-12 | 北京环清环境科技有限公司 | A kind of small evaporator incinerator |
CN108775573A (en) * | 2018-06-20 | 2018-11-09 | 江西四冶钢结构有限责任公司 | A kind of novel electricity generation boiler of burning away the refuse |
CN209196818U (en) * | 2018-11-23 | 2019-08-02 | 北京米能科技有限公司 | A kind of small-sized DC boiler |
-
2018
- 2018-11-23 CN CN201811402985.5A patent/CN109404879A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2725714Y (en) * | 2004-09-07 | 2005-09-14 | 长葛市开元锅炉有限责任公司 | Energy-saving environment protection boiler |
CN101038137A (en) * | 2007-04-19 | 2007-09-19 | 上海发电设备成套设计研究院 | Automatic control system for wall temperature of boiler discharged smoke heat recovery heat exchanger |
CN103836612A (en) * | 2014-02-28 | 2014-06-04 | 北京热华能源科技有限公司 | Superheated steam boiler of horizontal circulating fluidizing bed |
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CN105937758A (en) * | 2016-06-14 | 2016-09-14 | 廖洁芬 | Biomass direct-fired fire grate boiler |
CN107388578A (en) * | 2017-08-31 | 2017-11-24 | 北京环清环境科技有限公司 | A kind of hot-blast stove |
CN108775573A (en) * | 2018-06-20 | 2018-11-09 | 江西四冶钢结构有限责任公司 | A kind of novel electricity generation boiler of burning away the refuse |
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