CN208952081U - A kind of boiler secondary wind system - Google Patents
A kind of boiler secondary wind system Download PDFInfo
- Publication number
- CN208952081U CN208952081U CN201821683498.6U CN201821683498U CN208952081U CN 208952081 U CN208952081 U CN 208952081U CN 201821683498 U CN201821683498 U CN 201821683498U CN 208952081 U CN208952081 U CN 208952081U
- Authority
- CN
- China
- Prior art keywords
- secondary air
- burner hearth
- channel component
- air channel
- manifold assemblies
- Prior art date
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model belongs to boiler reforming technology field, discloses a kind of boiler secondary wind system.The secondary air duct of the system is connected with more set secondary air channel components, and every set secondary air channel component and burner hearth are corresponding with a spout, and every set secondary air channel component includes at least two groups Secondary Air manifold assemblies；In every set secondary air channel component, one end that every group of Secondary Air manifold assemblies are located at secondary air duct is spaced from each other, positioned at one end of burner hearth spout connection corresponding with secondary air channel component.The one end for being located at secondary air duct by being arranged to every group of Secondary Air manifold assemblies is spaced from each other, positioned at the mode of one end of burner hearth spout connection corresponding with secondary air channel component, so that when load decline, it can be by turning down or closing wherein one group of Secondary Air manifold assemblies, flow velocity without influencing other Secondary Air manifold assemblies in the set secondary air channel component, to maintain the momentum that Secondary Air passes through spout, solve the problems, such as that caused Secondary Air penetrability is bad when load decline.
Description
Technical field
The utility model relates to boiler reforming technology field more particularly to a kind of boiler secondary wind systems.
Background technique
In circulating fluidized bed boiler, burner hearth is generally divided into emulsion zone, transition region and dilute according to the different of material concentration
Phase region three parts, concentration of solid particles is larger in emulsion zone, and bed pressure is relatively high, has very big thermal capacity.Boiler actual motion
When, since concentration of solid particles is bigger in emulsion zone, bed shows as higher burner hearth positive pressure, so that Secondary Air air-flow penetrates
Resistance is very big, is difficult for wind to be sent into emulsion zone, and burner hearth oxygen amount often shows the distribution trend that surrounding is high, centre is low.Convection current
For fluidized bed boiler, First air need to guarantee that boiler normally fluidizes, and there are the limitation of incipient fluidization air quantity, it is negative that Secondary Air mainly plays boiler
The effect of lotus regulation and control burner hearth oxygen amount, with the change of load, modulability is larger, when load is lower, it is also necessary to stop
Only Secondary Air is run.
In boiler operatiopn, the secondary air system of conventional design is difficult for Secondary Air to be sent into the middle part of burner hearth；Especially with negative
When lotus changes, load is lower, and the secondary air flow needed is opposite to be reduced, in the case where spout sum and constant area of injection orifice, spray
One's intention as revealed in what one says speed can reduce therewith, and overfiren air port is caused to spray power dropping, penetration capacity decline.Conventional method is adjustment spout number
Amount when load is higher, opens all overfiren air ports, random close portion air port in two times after load reduction, but overfiren air port is big
Small and quantity is mainly to be designed down at full capacity, and arrangement is mainly the uniformity and covering surface from cloth wind, the bottom of with
The cooperation of portion's First air, the arrangement correspondence of burner hearth feeder and returning charge point and distribution of burner hearth oxygen amount etc. are considered.
If directly turning off part overfire air port be easy to cause that oxygen amount is unevenly distributed in furnace or relatively large deviation occurs in temperature field.
It would therefore be highly desirable to need to provide a kind of New-type boiler secondary air system to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of boiler secondary wind systems, are deposited with solving existing boiler secondary wind system
When load declines, the bad problem of the penetrability of Secondary Air.
For this purpose, the utility model uses following technical scheme:
A kind of boiler secondary wind system, including burner hearth and the secondary air duct connecting with burner hearth, secondary air duct is connected with more sets
Secondary air channel component, every set secondary air channel component include the secondary air box for accommodating Secondary Air, every set secondary air channel component
It is corresponding with a spout with burner hearth, every set secondary air channel component includes at least two groups Secondary Air manifold assemblies；
In every set secondary air channel component, one end that every group of Secondary Air manifold assemblies are located at secondary air duct is spaced from each other, and is located at
One end of burner hearth spout connection corresponding with secondary air channel component.
Preferably, every group of Secondary Air manifold assemblies are equipped with the first damper close to the part of secondary air duct, it is close
The part of burner hearth is equipped with the second damper.
Preferably, the first damper and the second damper are electric flap or manual air door.
Preferably, the whole body of burner hearth is symmetrically arranged with more set secondary air channel components.
Preferably, every two groups adjacent Secondary Air manifold assemblies are close to the part of burner hearth in every set secondary air channel component
Mutually it is arranged.
Preferably, every group of Secondary Air manifold assemblies are made close to the part of burner hearth of heat-resisting material.
Preferably, every group of Secondary Air manifold assemblies are to cast.
The utility model has the beneficial effects that
One end that the utility model is located at secondary air duct by being arranged to every group of Secondary Air manifold assemblies is spaced from each other, and is located at
The mode of one end of burner hearth spout connection corresponding with secondary air channel component so that when load decline, can by turning down or
Close wherein one group of Secondary Air manifold assemblies, the stream without influencing other Secondary Air manifold assemblies in the set secondary air channel component
Speed, to maintain the momentum that Secondary Air passes through spout, caused Secondary Air penetrability is bad when solving load decline is asked
Topic.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of boiler secondary wind system provided by the utility model；
Fig. 2 is another structural schematic diagram of boiler secondary wind system provided by the utility model.
In figure:
1, burner hearth；2, secondary air duct；3, secondary air channel component；
30, secondary air box；31, spout；32, Secondary Air manifold assemblies；33, the first damper；34, second wind is adjusted
Door.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
It as depicted in figs. 1 and 2, is the structural schematic diagram of boiler secondary wind system provided by the utility model.The pot
Furnace secondary air system includes burner hearth 1 and the secondary air duct connecting with burner hearth 12, and secondary air duct 2 is connected with more set secondary air channel components
3, every set secondary air channel component 3 is corresponding with a spout 31 with burner hearth 1, and every set secondary air channel component 3 includes at least two groups two
Secondary wind manifold assemblies 32；In every set secondary air channel component 3, every group of Secondary Air manifold assemblies 32 are located at one end phase of secondary air duct 2
It mutually separates, positioned at one end of burner hearth 1, spout 31 corresponding with the set secondary air channel component 3 is connected to.The utility model is by setting
Be set to every group of Secondary Air manifold assemblies 32 and be located at one end of secondary air duct 2 and be spaced from each other, positioned at one end of burner hearth 1 with the set two
The mode of secondary wind pipe component 3 corresponding spout 31 connection, so that when load decline, it can be by turning down or closing wherein one group two
Secondary wind manifold assemblies 32, the flow velocity without influencing other Secondary Air manifold assemblies 32 in the set secondary air channel component 3, to tie up
The momentum that Secondary Air passes through spout 31 has been held, has solved the problems, such as that caused Secondary Air penetrability is bad when load decline.
Specifically, every group of Secondary Air manifold assemblies 32 are equipped with the first damper 33 close to the part of secondary air duct 2, lean on
The part of nearly burner hearth 1 is equipped with the second damper 34, is equipped with and accommodates between the first damper 33 and the second damper 34
The secondary air box 30 of Secondary Air, the first damper 33 play the secondary air flow for entering secondary air box 30 from secondary air duct 2, the
Two dampers 34 play the secondary air flow for entering burner hearth 1 from secondary air box 30, and secondary air box 30 plays buffering Secondary Air
Effect, so that Secondary Air can enter in burner hearth 1 to uniform and stable.First damper 33 and the second damper 34 can be
Electric flap is also possible to manual air door, preferably uses electric flap in present embodiment, passes through the first damper 33
The secondary air flow of every group of Secondary Air manifold assemblies 32 can be adjusted with the second damper 34, when load decline, be led to
The flow for reducing wherein one group or several groups Secondary Air manifold assemblies 32 is crossed, it is other in the set secondary air channel component 3 without influencing
The flow velocity of Secondary Air manifold assemblies 32 plays to strengthen to penetrate and mends wind to maintain the momentum that Secondary Air passes through spout 31
Effect ensure that the still good advantage of Secondary Air penetration performance when load decline.
Specifically, the whole body of burner hearth 1 is symmetrically arranged with more sets secondary air channel component 3 (only showing two groups in Fig. 1 and Fig. 2), such as
This can guarantee that the Secondary Air for entering burner hearth 1 is symmetrical and uniform, conducive to mixing coal-fired in Secondary Air and burner hearth 1.
Specifically, every group of Secondary Air manifold assemblies 32 are made close to the part of burner hearth 1 of heat-resisting material, due to more leaning on
1 temperature of nearly burner hearth is higher, and for the service life for extending Secondary Air manifold assemblies 32, preferably it is close to the part of burner hearth 1 using high temperature resistant
Material is made, and further, can also coat high-temperaure coating on the surface of the part.
Specifically, every group of Secondary Air manifold assemblies 32 are to cast, the Secondary Air manifold assemblies formed by casting
32 reduce cutting output, belong to no machining, low processing cost.
Specifically, Fig. 2 is referred to, the boiler secondary wind system that Fig. 2 is provided is preferred embodiments of the present invention.Phase
Than the boiler secondary wind system that Fig. 1 is provided, the difference of the secondary air system of Fig. 2 offer is mainly reflected in: every set secondary air channel group
In part 3, every two groups adjacent Secondary Air manifold assemblies 32 are mutually arranged close to the part of burner hearth 1, so certifiable Secondary Air branch
The Secondary Air flowed out between tube assembly 32, which will not be formed (corresponding with identical spout 31) other Secondary Air manifold assemblies 32, to be hindered
Power.
Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For the ordinary skill user of fields, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (7)
1. a kind of boiler secondary wind system, including burner hearth (1) and the secondary air duct (2) connecting with the burner hearth (1), feature exists
In the secondary air duct (2) is connected with more sets secondary air channel component (3), and secondary air channel component (3) described in every set includes being used for
The secondary air box (30) of Secondary Air is accommodated, secondary air channel component (3) described in every set and the burner hearth (1) are corresponding with a spout
(31), secondary air channel component (3) described in every set includes at least two groups Secondary Air manifold assemblies (32)；
In secondary air channel component (3) described in every set, Secondary Air manifold assemblies (32) described in every group are located at the secondary air duct (2)
One end is spaced from each other, and is located at one end spout (31) corresponding with secondary air channel component (3) of the burner hearth (1) even
It is logical.
2. boiler secondary wind system according to claim 1, which is characterized in that Secondary Air manifold assemblies (32) described in every group
The first damper (33) are equipped with close to the part of the secondary air duct (2), are equipped with the close to the part of the burner hearth (1)
Two dampers (34).
3. boiler secondary wind system according to claim 2, which is characterized in that first damper (33) and described
Second damper (34) is electric flap or manual air door.
4. boiler secondary wind system according to claim 1, which is characterized in that the whole body of the burner hearth (1) is symmetrically arranged with
Cover the secondary air channel component (3) more.
5. boiler secondary wind system according to claim 1, which is characterized in that in secondary air channel component (3) described in every set,
The every two groups adjacent Secondary Air manifold assemblies (32) are mutually arranged close to the part of the burner hearth (1).
6. boiler secondary wind system according to claim 5, which is characterized in that Secondary Air manifold assemblies (32) described in every group
Part close to the burner hearth (1) is made of heat-resisting material.
7. boiler secondary wind system according to claim 1 to 6, which is characterized in that Secondary Air branch described in every group
Tube assembly (32) is to cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683498.6U CN208952081U (en) | 2018-10-17 | 2018-10-17 | A kind of boiler secondary wind system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683498.6U CN208952081U (en) | 2018-10-17 | 2018-10-17 | A kind of boiler secondary wind system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208952081U true CN208952081U (en) | 2019-06-07 |
Family
ID=66741856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821683498.6U Withdrawn - After Issue CN208952081U (en) | 2018-10-17 | 2018-10-17 | A kind of boiler secondary wind system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208952081U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185871A (en) * | 2018-10-17 | 2019-01-11 | 烟台龙源电力技术股份有限公司 | A kind of boiler secondary wind system |
-
2018
- 2018-10-17 CN CN201821683498.6U patent/CN208952081U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185871A (en) * | 2018-10-17 | 2019-01-11 | 烟台龙源电力技术股份有限公司 | A kind of boiler secondary wind system |
| CN109185871B (en) * | 2018-10-17 | 2023-09-15 | 烟台龙源电力技术股份有限公司 | Secondary air system of boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190607 Effective date of abandoning: 20230915 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190607 Effective date of abandoning: 20230915 |