CN106678786A - Bell jar type wind cap for environment-friendly energy-saving circulating fluidized bed boiler - Google Patents
Bell jar type wind cap for environment-friendly energy-saving circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN106678786A CN106678786A CN201710148744.1A CN201710148744A CN106678786A CN 106678786 A CN106678786 A CN 106678786A CN 201710148744 A CN201710148744 A CN 201710148744A CN 106678786 A CN106678786 A CN 106678786A
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- China
- Prior art keywords
- blast cap
- cap head
- wind cap
- bell
- environment
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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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a bell jar type wind cap for an environment-friendly energy-saving circulating fluidized bed boiler, belongs to the technical field of boiler structures, and solves the problems that a conventional wind cap is liable to slag leakage, a wind cap head and a wind cap seat are severely abraded, and the cost is high and economy is poor due to the fact that the wind cap is uneasy to change after abrasion. The bell jar type wind cap comprises the wind cap head, a protective sleeve and the wind cap seat, wherein the wind cap seat comprises a cylinder and a support plate; the support plate is mounted at the upper part of the cylinder in a sleeving manner; the protective sleeve comprises a barrel body and a locating ring fixedly connected on the outer edge of an open end of the barrel body; a plurality of first through holes are uniformly formed in the side wall of the upper part of the barrel body; a plurality of second through holes are uniformly formed in the top of the barrel body; the wind cap head and the protective sleeve are mounted on the support plate in a buckle manner; the wind cap head is fixedly connected with the support plate; the protective sleeve is positioned between the wind cap head and the wind cap seat; the outer side wall and the top outer edge of the locating ring are in tight contact with the inner wall of the wind cap head; and the wind cap head, the protective sleeve and the cylinder are coaxially arranged. The bell jar type wind cap is used for an air distribute device of the circulating fluidized bed boiler.
Description
Technical field
The present invention relates to a kind of CFBB blast cap, and in particular to a kind of environment-friendly and energy-efficient recirculating fluidized bed pot
Stove bell-type windshield, belongs to boiler structure technical field.
Background technology
In recent years, CFBB is used widely in generating, industrial production and central heating, and the feature of environmental protection
Can be to ensure the necessary condition that CFBB develops to high parameter, Large Copacity with energy-saving effect and stable operation.Circulation
In fluidized-bed combustion boiler, fluid bed is located at the bottom of burner hearth, and water cooled wind chamber is located at the lower section of stove fluid bed, and blast cap is recirculating fluidized bed
The important composition part of boiler air-distributing device, is arranged on burner hearth bottom water-cooled distributor, bottom connection water cooled wind chamber, First air
By blast cap even into burner hearth, fluidized bed material, its function is to make fluidized wind uniformly send into fluid bed, recirculating fluidized bed pot
In the course of the work, due to being washed away by high temperature circulation material, leakage slag phenomenon not only easily occurs, and (i.e. outside follows stove blast cap
Ring material is entered in blast cap by the air outlet on blast cap), blast cap outside and internal each part also serious wear, due in blast cap
Blast cap seat be firmly to be fixed on fluid bed, therefore change and be extremely difficult, also, the cooling of blast cap body is not enough, also can shadow
Ring its service life.
The content of the invention
The present invention is to solve the problems, such as existing blast cap leakiness slag and blast cap head and the equal serious wear of blast cap seat, wind
It is difficult to change caused high cost, less economical problem after cap abrasion, so it is ciculation fluidized there is provided a kind of environment-friendly and energy-efficient
Bed boiler bell-type windshield.
The present invention is for the solution technical scheme that adopted of above-mentioned technical problem：
A kind of environment-friendly and energy-efficient CFBB bell-type windshield, it includes blast cap head, and the blast cap head is clock
Bell-type, the lower sides of blast cap head are evenly equipped with some air outlets along its circumferencial direction, on blast cap head each air outlet by it is interior extremely
Outer incline is arranged,
It also includes protective case and blast cap seat, and the blast cap seat includes cylinder and gripper shoe, and gripper shoe is sleeved on cylinder
Top and fix as one with the lateral wall of cylinder, the protective case includes staving and is fixed in the positioning of staving openend outer
Circle, the openend of staving is lower end, and the upper portion side wall of staving uniformly offers some first through hole, and the top of staving uniformly opens up
There are some second through holes, on the supporting plate, its Apoplexy cap head is affixed with gripper shoe for blast cap head and the equal spiral-lock of protective case, protective case position
Between blast cap head and blast cap seat, wherein the lateral wall of centring ring and top outer are in close contact respectively with blast cap head inwall,
Blast cap head, protective case and cylinder are coaxially disposed.
Further, the circumferencial direction of gripper shoe is evenly equipped with some first locating pieces, and the bottom of blast cap head is along its circumference side
To being evenly equipped with some second locating pieces, some first locating pieces and some second locating pieces intersect cooperation, and the first locating piece with
Second positioning block welding.
Further, the air outlet is circular air outlet, and quantity is 12, the central axis and water of each air outlet
Angle square between is 10~12 degree.
Further, the longitudinal section of blast cap head outline is in convex shape structure, and its step surface is inclined-plane.
Further, the angle of inclination of the step surface and angle of inclination of air outlet is consistent arranges.
Further, the top of staving is also connected with locating dowel, and locating dowel is coaxially disposed with staving, and the top of locating dowel
It is in close contact with blast cap head inwall.
Further, a diameter of 10~12mm of the locating dowel.
Further, the quantity of the first through hole is six, per the distance between adjacent two first through hole for 8~
10mm。
Further, the quantity of second through hole is three, a diameter of 8~10mm of each the second through hole.
Further, the material of blast cap head, protective case and blast cap seat is ZG8Cr26Ni4Mn3N.
The present invention has the effect that compared with prior art：
Protective case is set between blast cap head and blast cap seat, can effectively prevent blast cap seat from wearing and tearing, in boiler operatiopn, in blast cap
Consumable accessory be only blast cap head, blast cap seat is the lifelong life-span, and blast cap head also need to be only changed during replacing；
From the dispersion drainage of cylinder fluidized wind out some first through hole on protective case, then flow out via air outlet
Blast cap, it is possible to achieve even distributing wind；
The top of protective case upper barrel body can effectively mitigate abrasion of the fluidized wind to blast cap overhead, while passing through some second
Through hole can realize cooling down certainly for blast cap head, effectively increase the service life of blast cap head；
The air outlet being obliquely installed and protective case can effectively prevent bed from entering blast cap, and anti-leak-stopping slag, cloth wind are equal
It is even；
Protective case is carried out complete spacing by blast cap head and blast cap seat, it is to avoid using being welded and fixed, be convenient for changing.
Present invention employs complete spacing, self cooled lower resistance, slag anti-leaking, wear-resistant bell-type windshield, it is ensured that circulation
Fluidized-bed combustion boiler can low emission, low energy consumption and long-term safety stable operation, realizing operation coal consumption reduces by more than 3%, saves
Power consumption more than 25%, economic benefit and social benefit significantly, thoroughly solve CFBB and send out to high parameter, Large Copacity
The technical barrier of exhibition.
Description of the drawings
Fig. 1 is the schematic front view of the present invention；
Fig. 2 is the A-A of Fig. 1 to cross-sectional schematic；
Fig. 3 is the B-B direction cross-sectional schematic of Fig. 2；
Fig. 4 is the C-C of Fig. 2 to cross-sectional schematic；
Fig. 5 is the main cross-sectional schematic diagram of blast cap head；
Fig. 6 is the elevational schematic view of blast cap head；
Fig. 7 is the schematic top plan view of blast cap head；
Fig. 8 is the main cross-sectional schematic diagram of protective case；
Fig. 9 is the F-F of Fig. 8 to cross-sectional schematic；
Figure 10 is the G of Fig. 8 to cross-sectional schematic；
Figure 11 is the main cross-sectional schematic diagram of blast cap seat；
Figure 12 is the E-E of Figure 11 to cross-sectional schematic.
Specific embodiment
Specific embodiment one：Present embodiment, a kind of environment-friendly and energy-efficient recirculating fluidized bed pot are illustrated with reference to Fig. 1~Figure 12
Stove bell-type windshield, it includes blast cap head 1, and the blast cap head 1 is bell-jar, and the lower sides of blast cap head 1 are along its circumference side
To being evenly equipped with some air outlet 1-1, each air outlet 1-1 is arranged to outer incline by interior on blast cap head 1,
It also includes protective case 2 and blast cap seat 3, and the blast cap seat 3 includes cylinder 3-1 and gripper shoe 3-2, gripper shoe 3-2
It is sleeved on the top of cylinder 3-1 and fixes as one with the lateral wall of cylinder 3-1, the protective case 2 includes staving 2-1 and affixed
In the centring ring 2-2 of staving 2-1 openends outer, the openend of staving 2-1 is lower end, and the upper portion side wall of staving 2-1 is uniformly opened
Some first through hole 2-11 are provided with, the top of staving 2-1 uniformly offers some second through hole 2-12, blast cap head 1 and protective case 2
Spiral-lock is in gripper shoe 3-2, and its Apoplexy cap head 1 is affixed with gripper shoe 3-2, protective case 2 be located at blast cap head 1 and blast cap seat 3 it
Between, wherein the lateral wall of centring ring 2-2 and top outer are in close contact respectively with the inwall of blast cap head 1, blast cap head 1, protective case 2
And cylinder 3-1 is coaxially disposed.
Gripper shoe 3-2 is circular base slab, is gap cooperation between protective case 2 and blast cap seat 3.
Blast cap have it is complete it is spacing, from cooling, lower resistance, light abrasion, easily changeable feature.Protective case 2 has blast cap air intake
Power is uniform, realizes sunken bed pressure, the operation of sunken bed temperature, thoroughly solves the problems, such as that bed temperature is high, resistance is big, slag, improves boiler environmentally friendly
Property, energy saving and stability.
Blast cap integrally using mazy complete spacing, self-cooling structure, thoroughly solves the problems, such as deslagging；Protective case 2 makes blast cap
1 abrasion mitigates significantly, realizes that cloth wind is uniform, resistance reduces；The setting of protective case 2 thoroughly avoids blast cap seat 3 and weares and teares, while
Realize complete spacing and cooling blast cap head 1；It is spot welding connection between blast cap head 1 and gripper shoe 3-2, facilitates blast cap head 1 and change, easily
It is only blast cap head 1 and protective case 2 to damage part, and blast cap seat 3 is the lifelong life-span；Blast cap is overall using the accurate casting of high-temperature alloy material
Make, it is ensured that the consistent size of blast cap head 1, resistance is little, wear-resistant, easy replacing.
It is an object of the invention to provide environmental protection and energy saving CFBB low emission, the low energy consumption recombinated based on fluidised form
With sunken bed pressure, the principle of the coordination technique of low abrasion stable operation and structure.By determining optimum fast bed state, it is ensured that most
Good amounts of fine particles；It is determined that the bubbling bed state of optimum, it is ensured that optimal coarse granule amount.By to core component in boiler combustion system
The structure design of blast cap, it is ensured that material reaches " matter " and " amount " of requirement.By to the improvement on cap structure, in environmental-protecting performance
On reach：NOx raw emissions are less than 100mg/Nm3 during oepration at full load；When calcium to sulphur mole ratio is about 2.0, desulfuration in furnace effect
Rate is more than 90%, it is achieved thereby that the low emission, low cost in environmental protection.By determining that Design of State is theoretical, recombinated based on fluidised form
Core is fine granular materials circulation, improves bed material quality.Thinner recycle stock particle diameter is to solve Wind cap for boiler abrasion and improve
Efficiency of combustion it is basic, realize the relatively thin bed of material, the pressure operation of relatively low bed, not only anti-wear but also energy consumption saving wheel.
Sunken bed in stove is caused by complete spacing, self cooled lower resistance, slag anti-leaking, anti abrasive bell-type windshield structure
Temperature, sunken bed compression ignition burn, and realize denitration in the stove and stable burning, and its simple process, operating cost are low, realize environment-friendly and energy-efficient and follow
Circulation fluidized bed boiler high reliability and low emission, the outstanding advantages of energy consumption saving wheel, represent CFBB product technology and send out
The new direction of exhibition.Environmental protection and energy saving CFBB is applied to using complete spacing, self-cooling structure design bell-type windshield
On, its technological merit will be significantly improved, it is that user brings bigger economic benefit.By desulfuration in furnace and NOx general principles
Environmental-protecting performance is reached with correlation, denitration in the stove, desulfurization is realized.Boiler is set to reach energy-conservation effect by structure technology superiority
Really, realize that boiler fully fires using the application of complete spacing, self cooled bell-type windshield by core component in combustion system
Burn, sunken bed pressure operation, operation coal consumption reduce by more than 3%, make boiler save power consumption more than 25%, year run time it is little up to 8000
When more than.There are preferable economic benefit and social benefit.
Specific embodiment two：Present embodiment is illustrated with reference to Fig. 2,3,6,11,12, the circumferencial direction of gripper shoe 3-2 is equal
Some first locating piece 3-21 are furnished with, the bottom of blast cap head 1 is evenly equipped with some second locating piece 1-2 along its circumferencial direction, some
First locating piece 3-21 and some second locating piece 1-2 intersect cooperation, and the first locating piece 3-21 and the second locating piece 1-2 welderings
Connect.It is so designed that, blast cap head 1 is connected with gripper shoe 3-2 for spot welding, is easy to the replacement operation of blast cap head 1.Other constitute and are connected
Relation is identical with specific embodiment one.
Specific embodiment three：Present embodiment is illustrated with reference to Fig. 1,2,4,5, the air outlet 1-1 is circular air outlet,
Quantity is 12, and the angle between the central axis and horizontal direction of each air outlet 1-1 is 10~12 degree.It is so designed that,
The angle is preferably 10 degree, and blast cap air-out can be made uniform, meets the needs of different air outputs, and the air outlet being obliquely installed
1-1 can effectively prevent bed from entering blast cap, anti-leak-stopping slag.Other compositions and annexation and specific embodiment one or two
It is identical.
Specific embodiment four：Present embodiment is illustrated with reference to Fig. 1,2,4,5, the longitudinal section of the outline of blast cap head 1 is in convex
Character form structure, its step surface is inclined-plane.It is so designed that, the bottom wall thickness of blast cap head 1 is big compared with top wall thickness, it is possible to increase blast cap head 1
Intensity, extends its service life, and step surface can reduce resistance in inclined-plane.Other compositions and annexation and specific embodiment
Three is identical.
Specific embodiment five：With reference to Fig. 1 and Fig. 5 explanation present embodiments, the angle of inclination of the step surface and air-out
The angle of inclination of mouth 1-1 is unanimously arranged.It is so designed that, it is to avoid caused abrasion, cloth wind are mutually blown between blast cap more reasonable.Other groups
Into identical with specific embodiment four with annexation.
Specific embodiment six：Present embodiment is illustrated with reference to Fig. 2, Fig. 8 and Figure 10, the top of staving 2-1 is also connected with
Locating dowel 2-3, locating dowel 2-3 is coaxially disposed with staving 2-1, and the top of locating dowel 2-3 is in close contact with the inwall of blast cap head 1.
It is so designed that, protective case 2 is carried out further spacing.Other compositions and annexation and specific embodiment one, two, four or five
It is identical.
Specific embodiment seven：With reference to Fig. 2, Fig. 8 and Figure 10 illustrate present embodiment, locating dowel 2-3 it is a diameter of
10~12mm.It is so designed that, the diameter is preferably 12mm, protective case can be fixed, without the need for adopting welding structure,
It is convenient for changing.Other compositions are identical with specific embodiment six with annexation.
Specific embodiment eight：Present embodiment is illustrated with reference to Fig. 2,8,9, the quantity of first through hole 2-11 is six
Individual, the distance between every adjacent two first through hole 2-11 are 8~10mm.Be so designed that, adjacent two first through hole it
Between distance be preferably 8mm, resistance and Uniform Ventilation can be reduced.Other compositions and annexation and specific embodiment one, two,
4th, five or seven is identical.
Specific embodiment nine：Present embodiment is illustrated with reference to Fig. 2,8,10, the quantity of the second through hole 2-12 is three
It is individual, a diameter of 8~10mm of each the second through hole 2-12.It is so designed that, the diameter of second through hole is preferably 8mm, can be with
Make protective case 2 on the premise of the abrasion of reduction blast cap head 1 is reached, cooling down certainly for blast cap head 1 is reached by the second through hole 2-12.Its
It constitutes identical with specific embodiment eight with annexation.
Specific embodiment ten：Present embodiment, the material of blast cap head 1, protective case 2 and blast cap seat 3 are illustrated with reference to Fig. 1~12
Matter is ZG8Cr26Ni4Mn3N.It is so designed that, further can effectively mitigates the abrasion of blast cap, improves the service life of blast cap.
Other compositions are identical with specific embodiment one, two, four, five, seven or nine with annexation.
Claims (10)
1. a kind of environment-friendly and energy-efficient CFBB bell-type windshield, it includes blast cap head (1), the blast cap head (1)
For bell-jar, the lower sides of blast cap head (1) are evenly equipped with some air outlets (1-1) along its circumferencial direction, on blast cap head (1) each
Air outlet (1-1) is by interior to outer incline setting, it is characterised in that：It also includes protective case (2) and blast cap seat (3), the wind
Cap seat (3) includes cylinder (3-1) and gripper shoe (3-2), gripper shoe (3-2) be sleeved on the top of cylinder (3-1) and with cylinder (3-
1) lateral wall fixes as one, and the protective case (2) is including staving (2-1) and is fixed in staving (2-1) openend outer
Centring ring (2-2), the openend of staving (2-1) is lower end, and the upper portion side wall of staving (2-1) uniformly offers some first through hole
(2-11), the top of staving (2-1) uniformly offers some second through holes (2-12), blast cap head (1) and protective case (2) spiral-lock
In gripper shoe (3-2), its Apoplexy cap head (1) is affixed with gripper shoe (3-2), and protective case (2) is positioned at blast cap head (1) and blast cap seat
(3) between, wherein the lateral wall of centring ring (2-2) and top outer are in close contact respectively with blast cap head (1) inwall, blast cap head
(1), protective case (2) and cylinder (3-1) are coaxially disposed.
2. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 1, it is characterised in that：
The circumferencial direction of gripper shoe (3-2) is evenly equipped with some first locating pieces (3-21), and the bottom of blast cap head (1) is equal along its circumferencial direction
Some second locating pieces (1-2) are furnished with, some first locating pieces (3-21) intersect cooperation with some second locating pieces (1-2), and
First locating piece (3-21) is welded with the second locating piece (1-2).
3. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 1 and 2, its feature exists
In：The air outlet (1-1) is circular air outlet, and quantity is 12, central axis and the level side of each air outlet (1-1)
Angle between is 10~12 degree.
4. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 3, it is characterised in that：
The longitudinal section of blast cap head (1) outline is in convex shape structure, and its step surface is inclined-plane.
5. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 4, it is characterised in that：
The angle of inclination of the step surface is consistent with the angle of inclination of air outlet (1-1) to be arranged.
6. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 1,2,4 or 5, it is special
Levy and be：The top of staving (2-1) is also connected with locating dowel (2-3), and locating dowel (2-3) is coaxially disposed with staving (2-1), and fixed
The top of position post (2-3) is in close contact with blast cap head (1) inwall.
7. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 6, it is characterised in that：
A diameter of 10~12mm of the locating dowel (2-3).
8. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 1,2,4,5 or 7, its
It is characterised by：The quantity of the first through hole (2-11) is six, and the distance between every adjacent two first through hole (2-11) are 8
~10mm.
9. a kind of environment-friendly and energy-efficient CFBB bell-type windshield according to claim 8, it is characterised in that：
The quantity of second through hole (2-12) is three, a diameter of 8~10mm of each the second through hole (2-12).
10. a kind of environment-friendly and energy-efficient CFBB bell-jar wind according to claim 1,2,4,5,7 or 9
Cap, it is characterised in that：The material of blast cap head (1), protective case (2) and blast cap seat (3) is ZG8Cr26Ni4Mn3N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710148744.1A CN106678786A (en) | 2017-03-13 | 2017-03-13 | Bell jar type wind cap for environment-friendly energy-saving circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710148744.1A CN106678786A (en) | 2017-03-13 | 2017-03-13 | Bell jar type wind cap for environment-friendly energy-saving circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106678786A true CN106678786A (en) | 2017-05-17 |
Family
ID=58828741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710148744.1A Pending CN106678786A (en) | 2017-03-13 | 2017-03-13 | Bell jar type wind cap for environment-friendly energy-saving circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106678786A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645571A (en) * | 2018-07-17 | 2020-01-03 | 丁杨洋 | Hood for boiler in power industry |
| CN116213039A (en) * | 2023-05-08 | 2023-06-06 | 哈尔滨博深科技发展有限公司 | Medium speed pulverizer combination that adaptation multiple coal types used is carried and is imitated wind ring device |
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Application publication date: 20170517 |
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