CN207962624U - A kind of Secondary Air gas fired-boiler with adjust automatically jet direction function - Google Patents
A kind of Secondary Air gas fired-boiler with adjust automatically jet direction function Download PDFInfo
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- CN207962624U CN207962624U CN201820142468.8U CN201820142468U CN207962624U CN 207962624 U CN207962624 U CN 207962624U CN 201820142468 U CN201820142468 U CN 201820142468U CN 207962624 U CN207962624 U CN 207962624U
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Abstract
The utility model is related to a kind of Secondary Air gas fired-boilers with adjust automatically jet direction function, burner hearth, several burners, several interior overfire air ports for being equipped with linkage swing mechanism and the small spout of swinging type equipped with primary zone, reburning zone, burnt zone and the Secondary Air active region in reburning zone in including, one end of linkage swing mechanism is installed on overfire air port shell, axis is equipped with the small spout of swinging type on the other end.Since the small spout of the swinging type being arranged in overfire air port has the function of shunting and capable of on demand being deflected according to the operation conditions of boiler, it can be under the premise of ensuring normal jet forward, the upper and lower of change or the angle to swing can also be passed through, change the flow direction of the combustion air for being split part of its submitting, to adjust combustion centre position on demand, real-time control and adjustment boiler operatiopn are in normal condition, ensure that fire door smoke temperature meets environmental requirement, overcome the deficiency of conventional boiler fire door smoke temperature difficulty control, it is a big innovation of Secondary Air gas fired-boiler, with very strong practicability and wide market application prospect.
Description
Technical field
The utility model is related to technical field of boiler combustion, it is especially a kind of with adjust automatically jet direction function two
Secondary wind gas fired-boiler.
Background technology
Fuel boiler can generate and be discharged in large quantities during the work time the interior exhaust gas containing NOx, be caused to ambient enviroment
Pollution effect, so, the content of NOx in discharge gas is reduced as much as possible, to ensure the quality of surrounding air, have very heavy
The meaning wanted is the project of current industry common concern.Secondary Air technology prevailing at present, also known as burnout degree technology are a kind of
It using the low-NO_x combustion technology of air stage feeding combustion system, has been widely used in coal-burning boiler, just innovatively draws within nearly 2 years
Enter into gas fired-boiler, first appears in utility model patent 201620397656.6.As shown in Figure 1, using Secondary Air skill
The gas fired-boiler of art generally comprises burner hearth 1, burner 2, the several layers of the setting of several stratoses set and be alternatively arranged and Secondary Air
The connected overfire air port 3 of gas pipeline gas circuit, the furnace chamber of burner hearth 1 is interior to be equipped with primary zone 11, reburning zone 12, burnt zone 13 and position
In the Secondary Air active region 14 in reburning zone 12；The overfire air port 3 is located at the downstream of burner cigarette airflow direction, fixed
It is arranged on demand around the burner hearth 1 corresponding with 14 position of Secondary Air active region in cavity wall 4；The burner 2 is set on demand
It sets on the side wall of burner hearth 1.When work, the combustion air of 60%-95% is sent into combustion-supporting in primary zone by burner 2, makes fuel
Burn in anaerobic environment, cause burning velocity slowly, ignition temperature it is not high, can inhibit thermal NO x's and fuel type NOx
It generates, advantageously reduces production quantities of the NOx in primary zone；The combustion air of remaining 5%-40% is led to by Secondary Air gas pipeline 4
It crosses the overfire air port 3 to be sent into the Secondary Air active region 14 of burner hearth, makes not obtaining abundant burning in primary zone 11 originally
Fuel first near 14 middle and lower part of Secondary Air active region reburning zone 12 and Secondary Air active region 14 in burn away, and
So that the NOx originally generated in primary zone is further restored, then enters back into and go out positioned at 14 top of Secondary Air active region to burner hearth
It burns away in burnt zone 13 between mouth region, until after-flame；Since burnt zone 13 is close to the outlet of burner hearth 1, inner air amount
Abundance makes fuel energy obtain abundant after-flame, but because flame temperature is relatively low, so final NOx generation amount is little, and due to before not
It obtains clean-burning fuel energy and obtains further abundant after-flame, therefore the yield of CO is almost nil.Secondary Air technology is because dividing simultaneously
The combustion air of a part is passed through from burner downstream, and furnace exhaust temperature can be made to have a degree of raising.It was verified that secondary
Wind technology different fuel, different load, the different type of furnace boiler on can play good drop nitrogen effect, and can save existing
Using early investment expensive in terms of the denitration emission reduction of tail portion and operating cost in technology, thus obtain the abundant affirmation of industry.But
It is that its certain a fly in the ointment, the Secondary Air being arranged on gas fired-boiler at present are gradually found that in the practice of long period
Spout is installed on furnace wall corresponding with Secondary Air active region 14 with straight-through form of tubes, and when work, Secondary Air is with straight line
Direction sprays into burner hearth, and sphere of action is limited, when cannot be applicable in boiler load variation, to flue gas between Secondary Air and burner
Residence time requires, and leads to the reduction of Secondary Air denitration efficiency, and in boiler heavy-duty service, and Secondary Air may make part pot
The furnace outlet gas temperature of stove is more than limit value.So remaining unreasonable place in structure, considers from technique effect angle, still owed
It is full, consider from point of view of practicability, also owes ideal.
Invention content
The purpose of this utility model is the shortcoming that overcome present in existing Secondary Air technology gas fired-boiler, provides one
Kind have automatically according to boiler operation conditions, on demand adjustment overfire air port air supply direction, be conducive to change or expand by
Overfire air port is sent into the sphere of action of combustion air, adjusts and do not obtain clean-burning flue gas in reburning zone in primary zone and stop
The time is stayed, to control combustion centre position, to meet the Secondary Air gas fired-boiler of furnace outlet gas temperature requirement.
The Secondary Air gas fired-boiler with adjust automatically jet direction function of the utility model, main body include burner hearth,
The overfire air port that burner, the several layers of several stratose settings set and are alternatively arranged, are connected with Secondary Air gas pipeline gas circuit,
Primary zone, reburning zone, burnt zone and the Secondary Air active region in reburning zone are equipped in the furnace chamber of the burner hearth；Described
Overfire air port is located at the downstream of burner cigarette airflow direction, is fixed on demand corresponding with Secondary Air effect zone position
In surrounding's cavity wall of burner hearth, the burner, which is arranged, to be arranged on demand on the side wall of burner hearth, is characterized in that described secondary
Linkage swing mechanism and the small spout of swinging type are provided in wind snout, wherein：Limit is fixed in one end of the linkage swing mechanism
Position axis installing is set on overfire air port shell, axis is installed and is equipped with the small spout of swinging type on the other end.
When work, the small spout of the swinging type have can be altered as desired around axis swaying direction or swing angle, to
Change the function of the air supply direction of the small spout of swinging type, and is sent to the combustion air of overfire air port to Secondary Air gas pipeline
With section shunting function；When boiler operatiopn is in normal condition, the small spout of swinging type is held in and overfire air port parallel shape
State, secondary air combustion aid air are entered by traditional line air supply mode in Secondary Air active region；And when boiler operatiopn is in underload shape
When state, the average flue gas flow rate in boiler is smaller, and residence time of the flue gas in reburning zone 12 is relatively long, the small spout of swinging type
It can swing and supply gas against cigarette airflow direction, make combustion centre is opposite to move down, to shorten residence time of the flue gas in reburning zone,
The residence time is set not change with boiler at low load operation, it is ensured that Secondary Air denitration efficiency；When boiler works in high load capacity shape
When state, the average flue gas flow rate in boiler is larger, and residence time of the flue gas in reburning zone is relatively short, and the small spout of swinging type can be suitable
It cigarette airflow direction to swing and supply gas, increases residence time of the flue gas in reburning zone, make the residence time not with boiler high load capacity
Operation changes, it is ensured that Secondary Air denitration efficiency.
Meanwhile if the case where burner hearth smoke temperature is more than limit value occurs in boiler, the small spout of swinging type can be put against cigarette airflow direction
It moves and supplies gas, make combustion centre is opposite to move down, advantageously reduce the outlet smoke temperature of boiler, be allowed to tend to be normal.
The utility model based on above-mentioned design has the Secondary Air gas fired-boiler of adjust automatically jet direction function, due to
Increase in the overfire air port of existing Secondary Air gas fired-boiler and is provided with shunting and can be pressed according to the operation conditions of boiler
The small spout of the swinging type of deflection is needed, is made under the premise of ensuring normal jet forward, moreover it is possible to by changing the small spray of swinging type
Mouthful the upper and lower or angle that swings, change the flow direction for the combustion air for being split part sent out by the small spout of swinging type,
Adjustment combustion centre position on demand, real-time control and adjustment boiler operatiopn are in normal condition, it is ensured that fire door smoke temperature is no more than limit value.
Although the structure of the technical solution of the utility model transfer portion on the basis of existing Secondary Air gas fired-boiler is less complicated, cost
Also increase seldom, but reasonable for structure and science, good drop nitrogen can be brought conscientiously and ensure boiler operatiopn in normal condition, especially
It is the distinguished positive technique effect for ensuring fire door smoke temperature and being no more than limit value, is a big innovation of Secondary Air gas fired-boiler,
Obviously there is very strong practicability and wide market application prospect.
Description of the drawings
Fig. 1 is the basic structure schematic diagram of the utility model embodiment；
Fig. 2 is the structure and normal operating conditions schematic diagram of the small spout of swinging type in the utility model embodiment；
Fig. 3 is that boiler operatiopn working condition of the small spout of swinging type when low load condition and reduction furnace outlet flue gas is shown
It is intended to；
Fig. 4 is the working state schematic representation of swinging type small spout when boiler works in higher load condition.
In figure：
1. 11. primary zone of boiler furnace, 12. reburning zone, 13. burnt zone
14. 31. linkage swing mechanism of Secondary Air active region 2. gas burner, 3. overfire air port
32. small 4. cavity wall of spout of swinging type.
Specific implementation mode
Below in conjunction with the accompanying drawings and exemplary embodiments the utility model is described in further detail.
In fig. 1 and 2, the Secondary Air gas fired-boiler with adjust automatically jet direction function of the utility model, it is main
Body include burner hearth 1, several stratoses setting burner 2, several layers set and be alternatively arranged, with Secondary Air gas pipeline gas circuit phase
Overfire air port 3 even, the furnace chamber of the burner hearth 1 is interior to be equipped with primary zone 11, reburning zone 12, burnt zone 13 and is located at reburning zone
Secondary Air active region 14 in 12；The overfire air port 3 is located at the downstream of burner cigarette airflow direction, is fixedly installed on demand
Around the burner hearth 1 corresponding with 14 position of Secondary Air active region in cavity wall 4, the burner 2 setting is being arranged on demand
On the side wall of burner hearth 1, it is characterized in that being provided with linkage swing mechanism 31 and the small spout of swinging type in the overfire air port 3
32, wherein：One end of the linkage swing mechanism 31 is fixed limit shaft installing and is set on 3 shell of overfire air port, the other end
The installing of upper axis is equipped with the small spout of the swinging type 32.
In figs. 2,3 and 4, when work, the small spout 32 of the swinging type have swing can be altered as desired around axis
The function of direction or swing angle, air supply direction to change the small spout of swinging type 32, and Secondary Air gas pipeline is sent into
Combustion air to overfire air port 3 has section shunting function；When boiler operatiopn is in normal condition, the small spout of swinging type 32
It is held in and enters Secondary Air active region by traditional line air supply mode with 3 parastate of overfire air port, secondary air combustion aid air
In 14；And when boiler operatiopn is in low load condition, the average flue gas flow rate in boiler is smaller, and flue gas stops in reburning zone 12
Stay the time relatively long, the small spout 32 of swinging type can be swung and supply gas against cigarette airflow direction, make combustion centre is opposite to move down, with
Shorten residence time of the flue gas in reburning zone 12, so that the residence time is not changed with boiler at low load operation, it is ensured that secondary
Wind denitration efficiency；When boiler works in higher load condition, the average flue gas flow rate in boiler is larger, and flue gas is in reburning zone 12
Residence time is relatively short, and the small spout 32 of swinging type can be swung and supply gas along cigarette airflow direction, increases flue gas in reburning zone
Residence time, so that the residence time is not changed with boiler heavy-duty service, it is ensured that Secondary Air denitration efficiency.
Meanwhile if the case where burner hearth smoke temperature is more than limit value occurs in boiler, the small spout 32 of swinging type can be against cigarette airflow direction
It swings and supplies gas, make combustion centre is opposite to move down, advantageously reduce the outlet smoke temperature of boiler, be allowed to tend to be normal.
Claims (1)
1. a kind of Secondary Air gas fired-boiler with adjust automatically jet direction function, main body includes burner hearth（1）, several stratoses
The burner of setting（2）, the several layers overfire air port that sets and be alternatively arranged, be connected with Secondary Air gas pipeline gas circuit（3）, institute
The burner hearth stated（1）Furnace chamber in be equipped with primary zone（11）, reburning zone（12）, burnt zone（13）With positioned at reburning zone（12）Interior two
Secondary wind active region（14）, the overfire air port（3）Positioned at the downstream of burner cigarette airflow direction, be fixed on demand with
Secondary Air active region（14）The corresponding burner hearth in position（1）Surrounding's cavity wall（4）On, the burner（2）It is arranged on-demand
It is arranged in burner hearth（1）Side wall on, it is characterised in that the overfire air port（3）Inside it is provided with linkage swing mechanism（31）With
The small spout of swinging type（32）, wherein：The linkage swing mechanism（31）One end fix limit shaft installing set Secondary Air spray
Mouthful（3）Axis is installed and is equipped with the swinging type that swaying direction or swing angle can be altered as desired around axis on shell, on the other end
Small spout（32）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820142468.8U CN207962624U (en) | 2018-01-29 | 2018-01-29 | A kind of Secondary Air gas fired-boiler with adjust automatically jet direction function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820142468.8U CN207962624U (en) | 2018-01-29 | 2018-01-29 | A kind of Secondary Air gas fired-boiler with adjust automatically jet direction function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087868A (en) * | 2018-01-29 | 2018-05-29 | 上海华之邦科技股份有限公司 | A kind of Secondary Air gas fired-boiler with adjust automatically jet direction |
| CN111765477A (en) * | 2020-06-24 | 2020-10-13 | 广州环投从化环保能源有限公司 | Secondary air control method for garbage incinerator |
-
2018
- 2018-01-29 CN CN201820142468.8U patent/CN207962624U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087868A (en) * | 2018-01-29 | 2018-05-29 | 上海华之邦科技股份有限公司 | A kind of Secondary Air gas fired-boiler with adjust automatically jet direction |
| CN111765477A (en) * | 2020-06-24 | 2020-10-13 | 广州环投从化环保能源有限公司 | Secondary air control method for garbage incinerator |
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