CN207035099U - The Water flow-path system of low emission type CFBB - Google Patents
The Water flow-path system of low emission type CFBB Download PDFInfo
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- CN207035099U CN207035099U CN201721029783.1U CN201721029783U CN207035099U CN 207035099 U CN207035099 U CN 207035099U CN 201721029783 U CN201721029783 U CN 201721029783U CN 207035099 U CN207035099 U CN 207035099U
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- water
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- collecting chamber
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Abstract
The Water flow-path system of low emission type CFBB; it is related to a kind of Water flow-path system of CFBB; to solve the problems, such as that existing circulating fluidized bed boiler water flow is complicated, water resistance is big, power-failure protecting is weak and without temperature adjusting, it includes drum, down-comer, water-cooling screen lower header, water-cooling screen, water-cooling screen upper collecting chamber, top connecting tube, water cooling header, water-cooling wall, aqueduct, low-level (stack-gas) economizer lower header, low-level (stack-gas) economizer, low-level (stack-gas) economizer upper collecting chamber, high-temperature economizer lower header, high-temperature economizer and high-temperature economizer upper collecting chamber；Connected in the middle part of down-comer with water-cooling screen lower header, water-cooling screen upper collecting chamber top is connected by top connecting tube with water cooling header；Water-cooling wall is connected by top connecting tube with water cooling header；Water cooling header is connected by aqueduct with low-level (stack-gas) economizer.The utility model realizes the initial minimum discharge of boiler by regulating and controlling fire box temperature, for low emission type CFBB.
Description
Technical field
It the utility model is related to a kind of Water flow-path system of CFBB, and in particular to low emission type is ciculation fluidized
The Water flow-path system of bed boiler.
Background technology
Environmental protection that Combustion technology of circulating fluidized has by it, energy saving are rapidly developed, with the day of environmental protection
Become strict and perfect, accelerate the exploitation and application of low emission type circulating fluidized bed boiler water flow system.Due to existing circulation
Fluidized-bed combustion boiler Water flow-path is complicated, water resistance is big, power-failure protecting is weak and without ignition temperature adjusting function.
Utility model content
The utility model provides a kind of Water flow-path system of low emission type CFBB, to solve existing recycle stream
Fluidized bed boiler Water flow-path is complicated, water resistance is big, power-failure protecting is weak and the problem of without temperature adjusting.
The utility model adopts the technical scheme that to solve the above problems：
The Water flow-path system of low emission type CFBB includes drum, down-comer, water-cooling screen lower header, water cooling
Screen, water-cooling screen upper collecting chamber, top connecting tube, water cooling header, water-cooling wall, aqueduct, low-level (stack-gas) economizer lower header, low temperature save
Coal device, low-level (stack-gas) economizer upper collecting chamber, high-temperature economizer lower header, high-temperature economizer and high-temperature economizer upper collecting chamber；
Drum is located at down-comer top and connected with down-comer top, is connected in the middle part of down-comer with water-cooling screen lower header, water
Cold screen lower header side connects with water-cooling screen, and water-cooling screen connects with water-cooling screen upper collecting chamber bottom, and water-cooling screen upper collecting chamber top passes through
Top connecting tube connects with water cooling header；
The bottom of down-comer is connected with water-cooling wall, and water-cooling wall is connected by top connecting tube with water cooling header, water cooling
Header is connected by aqueduct with low-level (stack-gas) economizer, and low-level (stack-gas) economizer connects with high-temperature economizer.
Further, water-cooling wall include preceding water-cooling wall, rear water-cooling wall, preceding water-cooling wall lower header, rear water-cooling wall lower header and
Front and rear water-cooling wall upper collecting chamber；The bottom of down-comer connects with preceding water-cooling wall lower header and rear water-cooling wall lower header, under preceding water-cooling wall
Header connects with preceding water-cooling wall bottom, and preceding water-cooling wall top connects with front and rear water-cooling wall upper collecting chamber, and rear water-cooling wall lower header is with after
Water-cooling wall bottom is connected, and rear water-cooling wall top is connected with front and rear water-cooling wall upper collecting chamber, and front and rear water-cooling wall upper collecting chamber is connected by top
Adapter connects with water cooling header.
Further, water-cooling wall also includes side wall lower header, side wall and side wall upper collecting chamber；Down-comer
Bottom connects with side wall lower header, and side wall lower header connects with side wall bottom, side wall top and side water
Cold wall upper collecting chamber is connected, and side wall upper collecting chamber is connected by top connecting tube with water cooling header.
Further, aqueduct is connected by low-level (stack-gas) economizer lower header with low-level (stack-gas) economizer, and low-level (stack-gas) economizer passes through low
Warm economizer upper collecting chamber connects with high-temperature economizer lower header, and high-temperature economizer lower header saves coal by high-temperature economizer and high temperature
Device upper collecting chamber is connected, and low-level (stack-gas) economizer upper collecting chamber is connected by economizer connecting tube with high-temperature economizer lower header.
Further, high-temperature economizer upper collecting chamber is connected by recirculation pipe with water cooling header, is pacified on recirculation pipe
Equipped with valve.
The beneficial effect of the utility model compared with prior art is：
1st, the utility model ensure that boiler burner hearth temperature in maximum continuous load maintains 850~880 DEG C, be adapted to desulfurization
Temperature simultaneously can suppress NO_x formation, reach original minimum discharge.
2nd, the utility model is that safety valve is housed on drum, water cooling header and high-temperature economizer upper collecting chamber, works as pot
During stove superpressure, safety valve is opened, system steam discharge pressure release, plays safeguard protection effect.
3rd, before of the present utility model, side, the water in rear water-cooling wall form Natural Circulation due to difference in specific gravity, the pot of Large Copacity
The not heated top connecting tube of cylinder, down-comer and outer section can provide cold water after power failure for each water-cooling wall；Water cooling header arrives
The aqueduct of low-level (stack-gas) economizer lower header can provide cold water for low and high temperature economizer, equally play power-failure protecting effect.
4th, recirculation pipe is provided between high-temperature economizer upper collecting chamber and water cooling header when the utility model designs, when
Have a power failure after occurring, valve on recirculation pipe (stop valve) need to only be opened, form circulation and steam of draining, it is possible to prevent boiler
Pressure rise.With gradually decreasing for boiler heat storage amount, boiler pressure can smoothly lower.Provided with recirculation pipe, play and stop
The booster action of electric protection.
5th, the utility model devise six Water flow-paths (be respectively drum and water-cooling screen, drum and preceding water-cooling wall, drum with
Water-cooling wall, drum and side wall, drum and economizer and economizer and water cooling header afterwards), it is actually relatively only for two
The Water flow-path system that vertical Water flow-path converges into, is specifically made up of anterior water-cooling wall side and rear portion economizer side, realizes fortune
Water flows naturally after water forced flow has a power failure during row, and this design is with the characteristic that Water flow-path system is simplified, water resistance is small.
6th, the utility model Water flow-path system realizes the Water flow-path system of low emission type CFBB to burning
Temperature is regulated and controled, and material bed tempertaure, furnace exit temperature control are being adapted to desulfuration in furnace and are reducing the scope of NO_x formation
It is interior.This Water flow-path system has that Water flow-path is simplified, water resistance is small, realizes power-failure protecting function, reaches the initial minimum discharge of boiler
And safe and stable operation.Realize by " being administered outside stove " to the transformation of " emission reduction in stove ", generated from Sources controlling pollutant.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model, and wherein arrow represents the flow direction of water.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the technical solution of the utility model.
Illustrate referring to Fig. 1, the Water flow-path system of low emission type CFBB includes drum 1, down-comer 2, water cooling
Shield lower header 3, water-cooling screen 4, water-cooling screen upper collecting chamber 5, top connecting tube 6, water cooling header 7, water-cooling wall, aqueduct 16, low
Warm economizer lower header 17, low-level (stack-gas) economizer 18, low-level (stack-gas) economizer upper collecting chamber 19, high-temperature economizer lower header 21, high temperature save coal
Device 22 and high-temperature economizer upper collecting chamber 23；
Drum 1 is located at the top of down-comer 2 and connected with the top of down-comer 2, and the middle part of down-comer 2 connects with water-cooling screen lower header 3
Logical, the side of water-cooling screen lower header 3 connects with water-cooling screen 4, and water-cooling screen 4 connects with the bottom of water-cooling screen upper collecting chamber 5, water-cooling screen upper collecting chamber
5 tops are connected by top connecting tube 6 with water cooling header 7；
The bottom of down-comer 2 is connected with water-cooling wall, and water-cooling wall is connected by top connecting tube 6 with water cooling header 7, water
Cold header 7 is connected by aqueduct 16 with low-level (stack-gas) economizer 18, and low-level (stack-gas) economizer 18 connects with high-temperature economizer 22.
Water in boiler water flow system in heating surface is rising flow, and the decline flow of water, which uses, to be arranged in outside burner hearth
Not heated down-comer, aqueduct structure.Boiler top arrangement major diameter drum, water cooling header, make boiler have larger water
Capacity.When boiler is in unexpected have a power failure, stove water will not vaporize, and have superior power-failure protecting function.
Water-cycling mode, forced water circulation is employed, make have higher water flow velocity in heating surface tube, so boiler operatiopn
When, under defined circulating water flow, stove water will not vaporize.Water flow velocity in the pipe of stove arrangement, when boiler water flow is specified
When quantity of circulating water more than 60% changes, subcooled boiling will not occur for water-cooling wall.Water flow-path arrangement is simple, water system resistance is small, makes
Boiler attendance, regulation are simpler.The current arranged in heating surface are all to flow to from top to bottom, and vent plug will not occur for water in pipe.Should
Stove arranges the drum 1 of major diameter, water cooling header 7, increases boiler water capacity.When unexpected have a power failure, needs are vaporized
Heat is more than the amount of stored heat in stove, protects boiler safety.So after unexpected have a power failure, boiler is completely secured in the water system of boiler
Securely and reliably.The following table of average water speed of heating surface.
The average water speed table of heating surface
| Load | Rise the water wall surface (m/s) of flowing | Rise the convection heating surface (m/s) of flowing |
| Nominal cycle water | ≥0.8 | ≥1.5 |
| 70% quantity of circulating water | ≥0.56 | ≥1.05 |
| 60% quantity of circulating water | ≥0.48 | ≥0.9 |
The minimum circulating water flow of boiler is the 70% of nominal cycle water-carrying capacity, water speed in 60% circulating water flow heating surface tube
Meet that the requirement of subcooled boiling does not occur for its reclaimed water.Boiler water resistance is smaller, and water system economize on electricity is obvious.
Illustrate referring to Fig. 1, in one of embodiment, water-cooling wall includes preceding water-cooling wall 9, rear water-cooling wall 15, preceding water-cooling wall
Lower header 8, rear water-cooling wall lower header 14 and front and rear water-cooling wall upper collecting chamber 10；The bottom of down-comer 2 and preceding water-cooling wall lower header 8 and
Water-cooling wall lower header 14 connects afterwards, and preceding water-cooling wall lower header 8 connects with the preceding bottom of water-cooling wall 9, the preceding top of water-cooling wall 9 and front and rear water
Cold wall upper collecting chamber 10 connects, and rear water-cooling wall lower header 14 connects with the rear bottom of water-cooling wall 15, the rear top of water-cooling wall 15 and front and rear water
Cold wall upper collecting chamber 10 is connected, and front and rear water-cooling wall upper collecting chamber 10 is connected by top connecting tube 6 with water cooling header 7.
In another embodiment, water-cooling wall also includes collecting on side wall lower header 11, side wall 12 and side wall
Case 13；The bottom of down-comer 2 connects with side wall lower header 11, and side wall lower header 11 connects with the bottom of side wall 12
Logical, the top of side wall 12 connects with side wall upper collecting chamber 13, and side wall upper collecting chamber 13 passes through top connecting tube 6 and water cooling
Header 7 connects.As an embodiment, aqueduct 16 passes through low-level (stack-gas) economizer lower header 17 and low-level (stack-gas) economizer 18
Connection, low-level (stack-gas) economizer 18 is connected by low-level (stack-gas) economizer upper collecting chamber 19 with high-temperature economizer lower header 21, under high-temperature economizer
Header 21 is connected by high-temperature economizer 22 with high-temperature economizer upper collecting chamber 23, and low-level (stack-gas) economizer upper collecting chamber 19 is connected by economizer
Adapter 20 connects with high-temperature economizer lower header 21.Water circulation is realized by economizer connecting tube 20.
In above-mentioned water circulation structure, during hot-water boiler normal operation, the water in stove does not allow to vaporize.If vaporize meeting
Generation water attack, water attack make boiler plant send sound, vibration, until damage equipment.Therefore the arrangement of hot-water boiler heating surface should
Using the structure for avoiding occurring subcooled boiling and stove water vapor.The utility model boiler employs forced water circulation, boiler blow-down water
Drum 1 is proceeded to, water-cooling wall lower header, water-cooling wall, water-cooling wall upper collecting chamber are entered by the tunnel of down-comer 2 one, introduced all the way under water-cooling screen
Header 3, water-cooling screen 4 and water-cooling screen upper collecting chamber 5, two-way enters water cooling header 7 by top connecting tube 6 simultaneously, then by leading
Water pipe 16 enters low-level (stack-gas) economizer lower header 17, through low-level (stack-gas) economizer 18, high-temperature economizer 22, finally collects from high-temperature economizer
Case 23 sends out qualified hot water, and recirculation pipe 24 is additionally provided between high-temperature economizer upper collecting chamber 23 and water cooling header 7.Pot
130 DEG C of stove highest exit water temperature, each pipe group exit water temperature have more than 25 DEG C of underheat, avoid that saturation boiling occurs.In order to ensure
Boiler is played a protective role during power failure, valve 25 is also equipped with recirculation pipe 24, valve 25, valve are opened when having a power failure
25 be shutoff valve, recirculation pipe 24 and the UNICOM of water cooling header 7, forms circulation, plays power-failure protecting effect.In a reality
Apply in example, as an embodiment, the quantity of high-temperature economizer 22 and low-level (stack-gas) economizer 18 is respectively two, two high temperature
Economizer 22 and two low-level (stack-gas) economizers 18 are each arranged in series, and are arranged such, are met actual demand.
Power-failure protecting measure of the present utility model is such, and the water in furnace wall cooling forms nature due to difference in specific gravity
Circulation, drum 1, the down-comer 2 of Large Copacity can provide cold water after power failure for water-cooling wall；Water cooling header 7 arrives economizer
Aqueduct 16 can provide cold water for economizer.After the water almost all in boiler is heated to saturation temperature, water is only possible to
Vaporization.Reliable steam exhaust device is housed on water return pipeline and economizer upper collecting chamber during design, in high-temperature economizer upper collecting chamber 23 and
Recirculation pipe 24 is provided between water cooling header 7, while plays the booster action of power-failure protecting.At this moment water cooling need to only be collected
Air bleeding valve in header 7 and economizer upper collecting chamber is opened, steam of draining, it is possible to prevent boiler pressure from raising.With in burner hearth
Thermal discharge gradually decreases, and boiler pressure can smoothly lower.High-temperature economizer upper collecting chamber 23 and water cooling header 7 it
Between be provided with recirculation pipe 24 and also function to the booster action of power-failure protecting., can temporary transient not steam bleeding if boiler pressure does not raise.
After restoring electricity, start water circulating pump before first to drive make-up pump and meanwhile open vent valve handle more than vapour drain.If pressure, temperature
Continue to raise, each fire door should be opened and by bed slagging, reduce amount of stored heat in stove, pot water is not vaporized.Or start the standby of setting
Run with power supply.
The utility model is disclosed as above with preferable case study on implementation, but is not limited to the utility model, any ripe
Professional and technical personnel is known, is not being departed from the range of technical solutions of the utility model, according to the technical essence of the utility model
Any simple modification, equivalent change and modification done to above case study on implementation, still belongs to technical solutions of the utility model scope.
Claims (6)
1. the Water flow-path system of low emission type CFBB, it is characterised in that：It include drum (1), down-comer (2),
Water-cooling screen lower header (3), water-cooling screen (4), water-cooling screen upper collecting chamber (5), top connecting tube (6), water cooling header (7), water cooling
Wall, aqueduct (16), low-level (stack-gas) economizer lower header (17), low-level (stack-gas) economizer (18), low-level (stack-gas) economizer upper collecting chamber (19), high temperature save
Coal device lower header (21), high-temperature economizer (22) and high-temperature economizer upper collecting chamber (23)；
Drum (1) is located at down-comer (2) top and connected with down-comer (2) top, down-comer (2) middle part and water-cooling screen lower header
(3) connect, water-cooling screen lower header (3) side connects with water-cooling screen (4), and water-cooling screen (4) connects with water-cooling screen upper collecting chamber (5) bottom
Logical, water-cooling screen upper collecting chamber (5) top is connected by top connecting tube (6) with water cooling header (7)；
The bottom of down-comer (2) is connected with water-cooling wall, and water-cooling wall is connected by top connecting tube (6) with water cooling header (7),
Water cooling header (7) is connected by aqueduct (16) with low-level (stack-gas) economizer (18), low-level (stack-gas) economizer (18) and high-temperature economizer
(22) connect.
2. the Water flow-path system of low emission type CFBB according to claim 1, it is characterised in that：Water-cooling wall bag
Include on preceding water-cooling wall (9), rear water-cooling wall (15), preceding water-cooling wall lower header (8), rear water-cooling wall lower header (14) and front and rear water-cooling wall
Header (10)；
The bottom of down-comer (2) connects with preceding water-cooling wall lower header (8) and rear water-cooling wall lower header (14), preceding water-cooling wall lower header
(8) connected with preceding water-cooling wall (9) bottom, preceding water-cooling wall (9) top connects with front and rear water-cooling wall upper collecting chamber (10), under rear water-cooling wall
Header (14) connects with rear water-cooling wall (15) bottom, and rear water-cooling wall (15) top connects with front and rear water-cooling wall upper collecting chamber (10), preceding
Water-cooling wall upper collecting chamber (10) is connected by top connecting tube (6) with water cooling header (7) afterwards.
3. the Water flow-path system of low emission type CFBB according to claim 2, it is characterised in that：Water-cooling wall is also
Including side wall lower header (11), side wall (12) and side wall upper collecting chamber (13)；The bottom of down-comer (2) and side water
Cold wall lower header (11) connects, and side wall lower header (11) connects with side wall (12) bottom, side wall (12) top
Connected with side wall upper collecting chamber (13), side wall upper collecting chamber (13) passes through top connecting tube (6) and water cooling header (7)
Connection.
4. according to the Water flow-path system of the low emission type CFBB of claim 1,2 or 3, it is characterised in that：Lead
Water pipe (16) is connected by low-level (stack-gas) economizer lower header (17) with low-level (stack-gas) economizer (18), and low-level (stack-gas) economizer (18) is saved by low temperature
Coal device upper collecting chamber (19) connects with high-temperature economizer lower header (21), and high-temperature economizer lower header (21) passes through high-temperature economizer
(22) connected with high-temperature economizer upper collecting chamber (23), low-level (stack-gas) economizer upper collecting chamber (19) passes through economizer connecting tube (20) and high temperature
Economizer lower header (21) connects.
5. the Water flow-path system of low emission type CFBB according to claim 4, it is characterised in that：High temperature saves coal
Device upper collecting chamber (23) is connected by recirculation pipe (24) with water cooling header (7), and recirculation pipe is provided with valve on (24)
(25)。
6. the Water flow-path system of low emission type CFBB according to claim 5, it is characterised in that：High temperature saves coal
The quantity of device (22) and low-level (stack-gas) economizer (18) is respectively two, two high-temperature economizers (22) and two low-level (stack-gas) economizers (18)
Each it is arranged in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721029783.1U CN207035099U (en) | 2017-08-16 | 2017-08-16 | The Water flow-path system of low emission type CFBB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721029783.1U CN207035099U (en) | 2017-08-16 | 2017-08-16 | The Water flow-path system of low emission type CFBB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207035099U true CN207035099U (en) | 2018-02-23 |
Family
ID=61487988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721029783.1U Withdrawn - After Issue CN207035099U (en) | 2017-08-16 | 2017-08-16 | The Water flow-path system of low emission type CFBB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207035099U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327840A (en) * | 2017-08-16 | 2017-11-07 | 哈尔滨红光锅炉总厂有限责任公司 | The Water flow-path system of low emission type CFBB |
-
2017
- 2017-08-16 CN CN201721029783.1U patent/CN207035099U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327840A (en) * | 2017-08-16 | 2017-11-07 | 哈尔滨红光锅炉总厂有限责任公司 | The Water flow-path system of low emission type CFBB |
| CN107327840B (en) * | 2017-08-16 | 2023-07-14 | 哈尔滨红光锅炉总厂有限责任公司 | Water flow system of low-emission circulating fluidized bed boiler |
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