CN106838886A - Overfire air port structure and the boiler with it - Google Patents
Overfire air port structure and the boiler with it Download PDFInfo
- Publication number
- CN106838886A CN106838886A CN201710079408.6A CN201710079408A CN106838886A CN 106838886 A CN106838886 A CN 106838886A CN 201710079408 A CN201710079408 A CN 201710079408A CN 106838886 A CN106838886 A CN 106838886A
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- CN
- China
- Prior art keywords
- jet pipe
- air port
- port structure
- boiler
- overfire air
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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
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention provides a kind of overfire air port structure and the boiler with it, the overfire air port structure includes：First jet pipe, the inlet end of the first jet pipe is located in secondary air box, and the outlet side of the first jet pipe is located in the burner hearth of boiler and the gas outlet of the first jet pipe is set towards the water-cooling wall in burner hearth；Material adding tube, the discharge end of material adding tube is located in the first jet pipe；Using the overfire air port structure of technical solution of the present invention, anticlogging fuel oil composition is added in the first jet pipe by material adding tube, on the water-cooling wall being blown into burner hearth in the presence of combustion-supporting Secondary Air in secondary air box into the anticlogging fuel oil composition in the first jet pipe, so as to effectively improve the utilization rate of anticlogging fuel oil composition, it is to avoid anticlogging fuel oil composition cannot be reached on water-cooling wall and is wasted.Solve the problems, such as that the anticlogging fuel oil composition feed postition additive utilization rate that station boiler of the prior art is used is low, high cost.
Description
Technical field
The present invention relates to boiler plant field, in particular to a kind of overfire air port structure and the boiler with it.
Background technology
Based on coal, clinker(ing) coal occupies very big proportion to the energy resource structure of China, and boiler uses easy during clinker(ing) coal
Generation water-cooling wall slagging scorification, has had a strong impact on the operation of the safety and economy of boiler.
It is the effective way for preventing boiler water wall slagging scorification to addition anticlogging fuel oil composition in stove.The additive commonly used at present
Feed postition mainly has upper coal belt to add and two kinds of hearth observing holes addition.Existing addition manner causes a large amount of additives not
Water-cooling wall wall can be reached and do not had Anti-slagging effect and wasted, additive utilization rate is low so that addition high cost
Without the feasibility for possessing industrial large-scale application.
The content of the invention
It is a primary object of the present invention to provide a kind of overfire air port structure and boiler with it, to solve existing skill
Anticlogging fuel oil composition feed postition additive utilization rate that station boiler in art is used is low, high cost problem.
To achieve these goals, according to an aspect of the invention, there is provided a kind of overfire air port structure, including：
First jet pipe, the inlet end of the first jet pipe is located in secondary air box, and the outlet side of the first jet pipe is located in the burner hearth of boiler and the
The gas outlet of one jet pipe is set towards the water-cooling wall in burner hearth；Material adding tube, the discharge end of material adding tube is located at the first spray
In pipe.
Further, there is airflow clearance between the inwall of the outer wall of material adding tube and the first jet pipe.
Further, the feed end of material adding tube is located at the outside of secondary air box.
Further, overfire air port structure also includes：Second jet pipe, the inlet end of the second jet pipe is located at secondary air box
Interior, the outlet side of the second jet pipe connects with the burner hearth of boiler.
Further, the second jet pipe is disposed adjacent with the first jet pipe.
Further, the diameter with diameter greater than the first jet pipe of the second jet pipe.
According to another aspect of the present invention, there is provided a kind of boiler, including：Secondary air box and burner hearth, secondary air box are set
On the outer wall of burner hearth, boiler also includes multiple overfire air port structures, and overfire air port structure is the Secondary Air of the above
Spout structure.
Further, multiple overfire air port structures along burner hearth circumferentially-spaced arrangement.
Further, the center line of the gas outlet of the first jet pipe of each overfire air port structure round phase default with first
Cut.
Further, the center line of the gas outlet of the second jet pipe of each overfire air port structure round phase default with second
Cut, wherein, the second jet pipe is the second jet pipe of any one of claim 4 to 6.
Further, secondary air box is multiple, and each two overfire air port structure setting is in a secondary air box.
Using the overfire air port structure of technical solution of the present invention, by setting the first jet pipe and material adding tube, first
The inlet end of jet pipe is located in secondary air box, and the outlet side of the first jet pipe is located in the burner hearth of boiler, and the first jet pipe outlet
Mouth is set towards the water-cooling wall in burner hearth；The discharge end of material adding tube is located in the first jet pipe, so as to pass through material adding tube
Anticlogging fuel oil composition is added in the first jet pipe, it is combustion-supporting secondary in secondary air box into the anticlogging fuel oil composition in the first jet pipe
It is blown under wind action on the water-cooling wall in burner hearth, so as to effectively improve the utilization rate of anticlogging fuel oil composition, it is to avoid Anti-slagging
Additive cannot be reached on water-cooling wall and is wasted.Solve the anticlogging fuel oil composition that station boiler of the prior art is used
Feed postition additive utilization rate is low, high cost problem.
The present invention proposes a kind of method and overfire air port by overfire air port addition additive, makes additive collection
In play Anti-slagging effect in water-cooled wall region, and burner hearth center etc. does not use additive away from water-cooled wall region.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, of the invention to show
Meaning property and its illustrates, for explaining the present invention, not constitute inappropriate limitation of the present invention embodiment.In the accompanying drawings：
Fig. 1 is optional a kind of cross-sectional view of overfire air port structure according to embodiments of the present invention；
Fig. 2 is optional a kind of overlooking the structure diagram of overfire air port structure according to embodiments of the present invention；And
Fig. 3 is optional a kind of structural representation of boiler according to embodiments of the present invention.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
10th, the first jet pipe；20th, secondary air box；30th, material adding tube；40th, the second jet pipe；50th, burner hearth.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Overfire air port structure according to embodiments of the present invention, as shown in figure 1, including：First jet pipe 10 and material are added
Pipe 30, the inlet end of the first jet pipe 10 is located in secondary air box 20, and the outlet side of the first jet pipe 10 is located in the burner hearth 50 of boiler
And first jet pipe 10 gas outlet towards in burner hearth 50 water-cooling wall set；The discharge end of material adding tube 30 is located at the first jet pipe
In 10.
Using the overfire air port structure of technical solution of the present invention, by setting the first jet pipe 10 and material adding tube 30,
The inlet end of the first jet pipe 10 is located in secondary air box 20, and the outlet side of the first jet pipe 10 is located in the burner hearth 50 of boiler, and the
The gas outlet of one jet pipe 10 is set towards the water-cooling wall in burner hearth 50；The discharge end of material adding tube 30 is located at the first jet pipe 10
It is interior, so as to anticlogging fuel oil composition is added in the first jet pipe 10 by material adding tube 30, the anti-caking into the first jet pipe 10
Slag additive is blown on the water-cooling wall in burner hearth 50 in the presence of combustion-supporting Secondary Air in secondary air box 20, so as to effectively improve
The utilization rate of anticlogging fuel oil composition, it is to avoid anticlogging fuel oil composition cannot be reached on water-cooling wall and is wasted.Solve existing skill
Anticlogging fuel oil composition feed postition additive utilization rate that station boiler in art is used is low, high cost problem.
During specific implementation, alternatively, as described in Figure 2, the cross section of the first jet pipe 10 and the second jet pipe 40 is rectangle, thing
Expect that the cross section of adding tube 30 is circular, rectangle or abnormity.
The outside that the feed end of material adding tube 30 is located at secondary air box 20 is used to be added to addition Anti-slagging in burner hearth 50
Agent, in order that combustion-supporting Secondary Air in secondary air box 20 can swimmingly enter the first jet pipe 10 so as to by anticlogging fuel oil composition band
Enter in burner hearth 50, the discharge end of material adding tube 30 is inserted in the first jet pipe 10 by the inlet end of the first jet pipe 10, material adding tube
Have between 30 axis and axially coincident and material adding tube 30 the outer wall and the inwall of the first jet pipe 10 of the first jet pipe 10
For the airflow clearance that the combustion-supporting Secondary Air in secondary air box 20 enters.The size of airflow clearance is configured according to specific needs,
Airflow clearance can enter more combustion-supporting Secondary Airs when larger such that it is able to which anticlogging fuel oil composition is preferably sprayed onto burner hearth 50
Interior water-cooling wall on, improve anticlogging fuel oil composition utilization rate.In addition, the outlet side of the first jet pipe 10 is towards in burner hearth 50
Water-cooling wall curving certain angle, can make the anticlogging fuel oil composition sprayed by the first jet pipe 10 preferably reach burner hearth 50
On water-cooling wall.
In order to the combustion-supporting Secondary Air ensured in secondary air box 20 can normally enter burner hearth 50, alternatively, is additionally provided with
Two jet pipes 40, the second jet pipe 40 is disposed adjacent with the first jet pipe 10, and the inlet end of the second jet pipe 40 is located in secondary air box 20, the
The outlet side of two jet pipes 40 connects with the burner hearth 50 of boiler.The diameter with diameter greater than the first jet pipe 10 of the second jet pipe 40 is used for only
On the spot to providing combustion-supporting Secondary Air in burner hearth 50, it is ensured that the normal combustion of boiler.
According to another embodiment of the invention, there is provided a kind of boiler, as shown in figure 3, including：Secondary air box 20 and stove
Thorax 50, secondary air box 20 is arranged on the outer wall of burner hearth 50, and boiler also includes multiple overfire air port structures, overfire air port knot
Structure is the overfire air port structure of above-described embodiment.
Using the boiler of the overfire air port structure of above-described embodiment, Anti-slagging can be added by material adding tube 30
Agent is added in the first jet pipe 10, into the work of the anticlogging fuel oil composition combustion-supporting Secondary Air in secondary air box 20 in the first jet pipe 10
It is blown under on the water-cooling wall in burner hearth 50, so as to effectively improve the utilization rate of anticlogging fuel oil composition, it is to avoid Anti-slagging is added
Agent cannot be reached on water-cooling wall and is wasted.Solve the anticlogging fuel oil composition addition that station boiler of the prior art is used
Mode additive utilization rate is low, high cost problem.
Specifically, multiple overfire air port structures along burner hearth 50 circumferentially-spaced arrangement, secondary air box 20 for multiple, every two
Individual overfire air port structure setting shares a secondary air box 20 in a secondary air box 20.
The cross section of the burner hearth 50 of the present embodiment is the rectangle with corner cut, and overfire air port structure setting has four, four
At four corner cuts of burner hearth 50, secondary air box 20 is provided with two to overfire air port structure setting, and two secondary air box 20 set
Put on two relative side walls of burner hearth 50, each two overfire air port structure setting is in a secondary air box 20.
In order that uniformly can be sprayed onto anticlogging fuel oil composition by the first jet pipe 10 in each overfire air port structure
On the water-cooling wall of burner hearth 50, alternatively, the center line of the gas outlet of the first jet pipe 10 of each overfire air port structure is with
One default circle is tangent, i.e., each first jet pipe 10 bends identical angle towards the water-cooling wall of burner hearth 50.
The center line of the gas outlet of the second jet pipe 40 of each overfire air port structure is tangent with the second default circle, so that
The combustion-supporting Secondary Air in secondary air box 20 is set to normally enter the centre of burner hearth 50, for the burning of the fuel of burner hearth 50 is provided
Sufficient oxygen.
The course of work of the boiler of the present embodiment is：Air-flow with anticlogging fuel oil composition enters through material adding tube 30
One jet pipe 10, burner hearth 50 is sprayed into after mixing with the combustion-supporting Secondary Air entered by secondary air box 20 by the first jet pipe 10.Secondary air box
The combustion-supporting Secondary Air of another part in 20 is injected directly into burner hearth 50 through the second jet pipe 40.In first jet pipe 10 and the second jet pipe 40
Heart line has an angle so that the mixed airflow of Secondary Air and anticlogging fuel oil composition rises closer to the water-cooled wall region of burner hearth 50
To the effect for preventing water-cooling wall slagging scorification.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (11)
1. a kind of overfire air port structure, it is characterised in that including：
First jet pipe (10), the inlet end of first jet pipe (10) is located in secondary air box (20), first jet pipe (10)
Outlet side be located in the burner hearth (50) of boiler and first jet pipe (10) gas outlet towards the water in the burner hearth (50)
Cold wall is set；
Material adding tube (30), the discharge end of the material adding tube (30) is located in first jet pipe (10).
2. overfire air port structure according to claim 1, it is characterised in that the outer wall of the material adding tube (30) with
There is airflow clearance between the inwall of first jet pipe (10).
3. overfire air port structure according to claim 2, it is characterised in that the feed end of the material adding tube (30)
Positioned at the outside of the secondary air box (20).
4. overfire air port structure according to claim 1, it is characterised in that the overfire air port structure also includes：
Second jet pipe (40), the inlet end of second jet pipe (40) is located in secondary air box (20), second jet pipe (40)
Outlet side connected with the burner hearth (50) of the boiler.
5. overfire air port structure according to claim 4, it is characterised in that second jet pipe (40) and described first
Jet pipe (10) is disposed adjacent.
6. overfire air port structure according to claim 4, it is characterised in that second jet pipe (40) with diameter greater than
The diameter of first jet pipe (10).
7. a kind of boiler, including：Secondary air box (20) and burner hearth (50), the secondary air box (20) are arranged on the burner hearth (50)
Outer wall on, it is characterised in that the boiler also includes multiple overfire air port structures, and the overfire air port structure is right
It is required that the overfire air port structure any one of 1 to 6.
8. boiler according to claim 7, it is characterised in that multiple overfire air port structures are along the burner hearth (50)
Circumferentially-spaced arrangement.
9. boiler according to claim 8, it is characterised in that first jet pipe (10) of each overfire air port structure
Gas outlet center line circle default with first it is tangent.
10. boiler according to claim 8, it is characterised in that the second jet pipe of each overfire air port structure
(40) center line of gas outlet is tangent with the second default circle, wherein, second jet pipe (40) is in claim 4 to 6
The second jet pipe (40) described in any one.
11. boilers according to claim 7, it is characterised in that the secondary air box (20) is multiple, two described in each two
Secondary wind snout structure setting is in a secondary air box (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710079408.6A CN106838886A (en) | 2017-02-14 | 2017-02-14 | Overfire air port structure and the boiler with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710079408.6A CN106838886A (en) | 2017-02-14 | 2017-02-14 | Overfire air port structure and the boiler with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106838886A true CN106838886A (en) | 2017-06-13 |
Family
ID=59127314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710079408.6A Pending CN106838886A (en) | 2017-02-14 | 2017-02-14 | Overfire air port structure and the boiler with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106838886A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050198A (en) * | 2020-08-19 | 2020-12-08 | 神华神东电力有限责任公司 | Boiler system |
| CN112361371A (en) * | 2020-11-10 | 2021-02-12 | 西安热工研究院有限公司 | Method for burning high-alkali coal and boiler system |
| CN113405089A (en) * | 2021-07-22 | 2021-09-17 | 西安热工研究院有限公司 | Primary air powder nozzle with additive nozzle for pulverized coal fired boiler |
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| US6120281A (en) * | 1996-02-06 | 2000-09-19 | Vatsky; Joel | Combustion method utilizing tangential firing |
| RU2463520C1 (en) * | 2011-03-14 | 2012-10-10 | Олег Владимирович Семичев | Swirling-type furnace |
| CN103216821A (en) * | 2013-04-27 | 2013-07-24 | 东方电气集团东方锅炉股份有限公司 | Multi-stage stratified combustion system and method for primary air and secondary air of boiler |
| CN105823079A (en) * | 2016-04-11 | 2016-08-03 | 中国神华能源股份有限公司 | Air distribution method of oxygen-enriched combustion boiler |
| CN106247325A (en) * | 2016-08-08 | 2016-12-21 | 上海交通大学 | A kind of boiler-burner blends kaolinic device and method |
-
2017
- 2017-02-14 CN CN201710079408.6A patent/CN106838886A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6120281A (en) * | 1996-02-06 | 2000-09-19 | Vatsky; Joel | Combustion method utilizing tangential firing |
| RU2463520C1 (en) * | 2011-03-14 | 2012-10-10 | Олег Владимирович Семичев | Swirling-type furnace |
| CN103216821A (en) * | 2013-04-27 | 2013-07-24 | 东方电气集团东方锅炉股份有限公司 | Multi-stage stratified combustion system and method for primary air and secondary air of boiler |
| CN105823079A (en) * | 2016-04-11 | 2016-08-03 | 中国神华能源股份有限公司 | Air distribution method of oxygen-enriched combustion boiler |
| CN106247325A (en) * | 2016-08-08 | 2016-12-21 | 上海交通大学 | A kind of boiler-burner blends kaolinic device and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050198A (en) * | 2020-08-19 | 2020-12-08 | 神华神东电力有限责任公司 | Boiler system |
| CN112361371A (en) * | 2020-11-10 | 2021-02-12 | 西安热工研究院有限公司 | Method for burning high-alkali coal and boiler system |
| CN113405089A (en) * | 2021-07-22 | 2021-09-17 | 西安热工研究院有限公司 | Primary air powder nozzle with additive nozzle for pulverized coal fired boiler |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170613 |
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| RJ01 | Rejection of invention patent application after publication |