CN104359106A - Nozzle device with multi-strand over fire air - Google Patents
Nozzle device with multi-strand over fire air Download PDFInfo
- Publication number
- CN104359106A CN104359106A CN201410593705.9A CN201410593705A CN104359106A CN 104359106 A CN104359106 A CN 104359106A CN 201410593705 A CN201410593705 A CN 201410593705A CN 104359106 A CN104359106 A CN 104359106A
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- China
- Prior art keywords
- air
- coal
- nozzle device
- air inlet
- over fire
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/10—Nozzle tips
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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 discloses a nozzle device with multi-strand over fire air, and belongs to the technical field of powdered coal furnace equipment of a thermal power plant. The device comprises a material storing barrel with a front baffle and a rear baffle, a plurality of air pipes which are communicated with a powdered coal furnace are arranged on the front baffle, and a throttling valve is arranged on each air pipe; an air inlet opening is formed in the rear baffle, an air inlet barrel is mounted in the air inlet opening, the air inlet barrel is connected with an air inlet pipe, the air inlet pipe is connected with two branches, one branch is connected with a coal powder inlet pipe, and the other branch is connected with a fan. Through the use of the device disclosed by the invention, single strand of the over fire air is resolved into the multi-strand over fire air by regulating the number of the strands and the flow of the over fire air which is led into a coal powder hearth, the suction of the over fire air is greatly improved, so that the over fire air can be more fully mixed with surrounding smoke gas, coal powder particles are urged to burn out, and the standing time of the coal powder particles in the furnace is also prolonged. The device has the advantages that the structure is simple and compact, the device is safe and reliable, the regulation is convenient, the cost is low, and the device is energy-saving and environment-friendly.
Description
Technical field
The invention belongs to thermal power plant's powder coal stove equipment technical field, be specifically related to a kind of multiple flow burnout degree spray nozzle device.
Background technology
Along with the fast development of China's economy, the consumption of the energy is increased day by day.Coal, as the main primary energy of China, occupies very large ratio in the power-equipment and the consumption of resident's daily life equal energy source of station boiler, Industrial Boiler, various related industrial fields.The NOx that coal-fired power station boiler discharges in combustion, dust etc. cause very large harm to environmental protection and human health.Coal-powder boiler is the main type of furnace of power industry, and coal-powder boiler is also main NOx emission source.Interrelated data shows, station boiler NOx discharge accounts for the over half of various burner NOx discharge summation, and about 80% is discharged by coal-powder boiler.In recent years, along with developing rapidly of power industry, thermoelectricity installed capacity increases considerably year by year, and NOx emission certainly will cause ecological environment to worsen further.Control NOx emission in coal-powder boiler most important to extenuating the ever-increasing trend of China's NOx emission.
At present, application of air classification low NOx combusting technology minimizing coal-powder boiler NOx discharge has achieved in China and has applied comparatively widely.Compared with other denitration technology, air staged combustion technology has the features such as initial cost is low, operation is simple, later maintenance is less.This makes Researched of Air Staging Combustion Burning Pulverized Coal become top-priority a kind of low-NO_x combustion technology controlling NOx discharge in the design and coal-powder boiler transformation of burner.
The Main Function of air classification low NOx combusting technology is the generation suppressing coal-powder boiler fuel type NOx.Classification is carried out to coal dust firing required air, makes primary zone form fuel-rich oxygen-lean atmosphere, NOx reduction reaction occurs; Form oxygen enrichment lean combustion atmosphere at primary zone upper area, realize the clean-burning object of coal dust.But, adopt air staged combustion technology that the coal-powder boiler thermal efficiency usually can be caused to decline, mainly because coal dust particle can not in stove caused by abundant after-flame.
Summary of the invention
The object of the present invention is to provide a kind of multiple flow burnout degree spray nozzle device, this device effectively can strengthen the time of staying of coal dust in coal-powder boiler, makes the abundant after-flame of coal dust, thus effectively solves the problem that in thermal power plant coal powder stove, the thermal efficiency declines.
The present invention is achieved through the following technical solutions:
A kind of multiple flow burnout degree spray nozzle device, comprises the material storage tube with front apron and backboard, front apron is provided with some airducts be connected with powder coal stove, and each airduct is equipped with choke valve; Backboard is provided with air inlet, is provided with air intake cylinder in air inlet, air intake cylinder is connected with blast pipe, blast pipe connects two branch roads, and a road connects into coal pipe, another road connecting fan.
Connect at blast pipe and be provided with coal power flowmeter on the branch road of coal pipe.
The branch road of described blast pipe connecting fan is provided with combustion air flowmeter.
The first stop valve is provided with at the entrance point of air intake cylinder.
The second stop valve is provided with at the entrance point entering fine coal pipe.
Pipeline between combustion air flowmeter and blower fan is provided with the 3rd stop valve.
Bottom material storage tube, be also provided with service hatch, service hatch is provided with service cover.
Compared with prior art, the present invention has following useful technique effect:
A kind of multiple flow burnout degree spray nozzle device of the present invention, coal dust is mixed together from entering coal pipe with the air stream sending into blast pipe from blower fan, these gaseous mixture powder flow through air intake cylinder and flow in material storage tube, flow in coal-powder boiler by several airducts on front apron, airduct is provided with choke valve, by regulating the aperture of choke valve, the burnout degree number of share of stock of Pulverized-coal-fired Furnaces is passed into and sub-thread burnout degree is decomposed into multiply burnout degree by flow with regard to adjustable, what enhance burnout degree greatly entrainments power, make it can more fully with the blending of flue gas generation around, impel coal dust particle after-flame, also extend the time of staying of coal dust particle in stove.This apparatus structure is simply compact, safe and reliable, easy to adjust, and cost is low, energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1 is front apron; 2 is choke valve; 3 is airduct; 4 is material storage tube; 5 is backboard; 6 is air intake cylinder; 7 is combustion air flowmeter; 8 is coal power flowmeter; 9 is the second stop valve; 10 for entering fine coal pipe; 11 is blower fan; 12 is blast pipe; 13 is service cover; 14 is the first stop valve; 15 is the 3rd stop valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 1, a kind of multiple flow burnout degree spray nozzle device of the present invention, be connected to front apron 1 in the front end of material storage tube 4, rear end is connected to backboard 5, bottom material storage tube 4, have service hatch, is equiped with service cover 13 above.Front apron 1 has multiple airduct 3, and each airduct 3 is all equipped with choke valve 2.Backboard 5 is provided with air intake cylinder 6, air intake cylinder 6 is connected with blast pipe 12, blast pipe 12 connects two branch roads, and a road connects into coal pipe 10, another road connecting fan 11.Connect at blast pipe 12 and be provided with coal power flowmeter 8 on the pipeline of coal pipe 10, the branch road of blast pipe 12 connecting fan 11 is provided with combustion air flowmeter 7.Be provided with the first stop valve 14 at the entrance point of air intake cylinder 6, be provided with the second stop valve 9 at the entrance point entering fine coal pipe 10, the pipeline between combustion air flowmeter 7 and blower fan 11 is provided with the 3rd stop valve 15.
A kind of multiple flow burnout degree spray nozzle device of the present invention, in use:
Coal dust is mixed together from entering coal pipe 10 with the air stream sending into blast pipe 12 from blower fan 11, these gaseous mixture powder flow through air intake cylinder 6 and flow in material storage tube 4, flow in coal-powder boiler by several airducts 3 on front apron 1, airduct 3 is provided with choke valve 2, by regulating the aperture of choke valve 2, pass into burnout degree number of share of stock and the flow of Pulverized-coal-fired Furnaces with regard to adjustable, make it to match with coal-powder boiler load.Meanwhile, by regulating coal power flowmeter 8, the flow of fine coal can being controlled, adjusting wind speed with practical requirement by regulating combustion air flowmeter 7.
Claims (7)
1. a multiple flow burnout degree spray nozzle device, it is characterized in that, comprise the material storage tube (4) with front apron (1) and backboard (5), front apron (1) is provided with some airducts (3) be connected with powder coal stove, and each airduct (3) is equipped with choke valve (2); Backboard (5) is provided with air inlet, air intake cylinder (6) is installed in air inlet, air intake cylinder (6) is connected with blast pipe (12), blast pipe (12) connects two branch roads, one tunnel connects into coal pipe (10), another road connecting fan (11).
2. a kind of multiple flow burnout degree spray nozzle device according to claim 1, is characterized in that, connects be provided with coal power flowmeter (8) at blast pipe (12) on the branch road of coal pipe (10).
3. a kind of multiple flow burnout degree spray nozzle device according to claim 1, is characterized in that, the branch road of described blast pipe (12) connecting fan (11) is provided with combustion air flowmeter (7).
4. a kind of multiple flow burnout degree spray nozzle device according to claim 3, is characterized in that, be provided with the first stop valve (14) at the entrance point of air intake cylinder (6).
5. a kind of multiple flow burnout degree spray nozzle device according to claim 4, is characterized in that, be provided with the second stop valve (9) at the entrance point entering fine coal pipe (10).
6. a kind of multiple flow burnout degree spray nozzle device according to claim 5, is characterized in that, the pipeline between combustion air flowmeter (7) and blower fan (11) is provided with the 3rd stop valve (15).
7. according to a kind of multiple flow burnout degree spray nozzle device in claim 1 ~ 6 described in any one, it is characterized in that, be also provided with service hatch in material storage tube (4) bottom, service hatch is provided with service cover (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593705.9A CN104359106A (en) | 2014-10-29 | 2014-10-29 | Nozzle device with multi-strand over fire air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593705.9A CN104359106A (en) | 2014-10-29 | 2014-10-29 | Nozzle device with multi-strand over fire air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104359106A true CN104359106A (en) | 2015-02-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410593705.9A Pending CN104359106A (en) | 2014-10-29 | 2014-10-29 | Nozzle device with multi-strand over fire air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104359106A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202852807U (en) * | 2012-10-22 | 2013-04-03 | 牛弓弦 | Small size boiler pulverized coal burner |
| CN103134050A (en) * | 2013-03-07 | 2013-06-05 | 上海锅炉厂有限公司 | Multi-coal low-nitrogen pulverized coal combustion device with gap wind |
| CN203642167U (en) * | 2013-12-06 | 2014-06-11 | 烟台龙源电力技术股份有限公司 | W flame boiler with multiple over-fire air nozzles |
| CN204213918U (en) * | 2014-10-29 | 2015-03-18 | 榆林学院 | A kind of multiple flow burnout degree spray nozzle device |
-
2014
- 2014-10-29 CN CN201410593705.9A patent/CN104359106A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202852807U (en) * | 2012-10-22 | 2013-04-03 | 牛弓弦 | Small size boiler pulverized coal burner |
| CN103134050A (en) * | 2013-03-07 | 2013-06-05 | 上海锅炉厂有限公司 | Multi-coal low-nitrogen pulverized coal combustion device with gap wind |
| CN203642167U (en) * | 2013-12-06 | 2014-06-11 | 烟台龙源电力技术股份有限公司 | W flame boiler with multiple over-fire air nozzles |
| CN204213918U (en) * | 2014-10-29 | 2015-03-18 | 榆林学院 | A kind of multiple flow burnout degree spray nozzle device |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150218 |