CN101440966B - Intermediate-frequency igniter of coal-burning boiler - Google Patents
Intermediate-frequency igniter of coal-burning boiler Download PDFInfo
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- CN101440966B CN101440966B CN2008102402916A CN200810240291A CN101440966B CN 101440966 B CN101440966 B CN 101440966B CN 2008102402916 A CN2008102402916 A CN 2008102402916A CN 200810240291 A CN200810240291 A CN 200810240291A CN 101440966 B CN101440966 B CN 101440966B
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- coal
- honeycomb duct
- burning boiler
- point firearm
- intermediate frequency
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Abstract
The present invention relates to a coal-fired boiler intermediate frequency or high-frequency igniter which comprises an injector, an outer casing, a honeycomb tube and a heating coil, wherein the honeycomb tube adopts metal or graphite lining ceramic, and the honeycomb tube is provided with multi-layer through-holes, two ends are respectively provided with a blower nozzle connected with a blast blower for blowing coal powder and an injector nozzle for the boiler injecting ignition. The heating coil is made into ring body from red copper tube, the ring body surrounds the outer side of the honeycomb tube, and a flame-proof heat insulation material is filled between the outer casing of the injector and the honeycomb tube. The heating coil is provided with a pair of terminals for connecting the intermediate frequency or high-frequency electric source and an entrance and exit for circulating cooling medium. The coal-fired boiler intermediate frequency or high-frequency igniter of the present invention has the advantages by realizing ignition without oil, because the intermediate frequency or high-frequency heating coil is adopted, when the temperature of the honeycomb tube reach 1000 DEG C to 1500 DEG C, the blast blower blows the coal powder and the air, and the coal powder is ignited by injecting. The present invention has the characteristics of rapid temperature-increasing, lowenergy consumption, simple operation, small investment, wide application, and can be applied in furnace starting ignition of various coal-fired boilers.
Description
Technical field
The present invention relates to boiler plant, particularly relate to a kind of coal-burning boiler intermediate-frequeney point firearm.
Background technology
At present, at home and abroad in the thermal power generation corporations, traditional sparking mode that coal-burning boiler uses has two kinds usually.A kind of is fuel ignition, and this sparking mode exists oil consumption big, and the shortcoming that cost is high makes coal electricity enterprise become one of oil consumption rich and influential family, causes this year fuel cost with oil of the sector high.Another kind is the plasma ignition mode, and there is following defective in this sparking mode:
A) one-time investment is big;
B) system complex, the operation maintenance amount is big, maintenance cost height (the anode and cathode life-span is short);
C) be suitable for coal narrow (limiting the use of in bituminous coal), ignition success rate is low;
D) equipment is huge, is not suitable for old factory and undergoes technological transformation.
Summary of the invention
Purpose of the present invention is exactly in order to overcome above defective, provides a kind of non-oil ignition of realizing, quick heating, the coal-burning boiler intermediate-frequeney point firearm that energy consumption is low, investment is little, easy and simple to handle.
For achieving the above object, coal-burning boiler intermediate-frequeney point firearm provided by the invention, comprise the injector shell, also comprise built-in honeycomb duct and heater coil, honeycomb duct is provided with the uniform multilayer through hole of ring-type vertically, and the two ends of described honeycomb duct are respectively equipped with the jet that is used for the blast orifice that is connected with the air blast that is blown into coal dust and is used for the boiler by spraying igniting; Heater coil adopts copper tube to make ring bodies, ring bodies is looped around the honeycomb duct outside, be filled with fire-resistant heat insulating material between injector shell and the honeycomb duct, heater coil two ends self-injection device side wall of outer shell stretches out and is respectively equipped with and is used for the terminal that is connected with intermediate frequency power supply, and ring bodies is provided with the entrance and exit that is used for circulating cooling medium respectively at the two-terminal place.
Coal-burning boiler intermediate-frequeney point firearm of the present invention, wherein said honeycomb duct adopt metal or graphite lining pottery to make, and the length of described honeycomb duct is 50-1000mm, and the diameter of through hole is 10-30mm, and through hole is provided with the 2-7 layer.
Coal-burning boiler intermediate-frequeney point firearm of the present invention, wherein said heater coil is divided into two parts, described heater coil another part be provided be used for being connected with intermediate frequency power supply another to terminal, and be used for another inlet and another outlet that feeds circulating cooling medium in parallel.
Coal-burning boiler intermediate-frequeney point firearm of the present invention, the wind speed of wherein said air blast is 5-35m/s, the aerial content of coal dust is 0.4-1.0Kg/m
3
Coal-burning boiler intermediate-frequeney point firearm of the present invention, wherein said intermediate frequency power supply have the electric current of intermediate frequency output of 5KHz-20KHz.
Coal-burning boiler intermediate-frequeney point firearm of the present invention, wherein said fire-resistant heat insulating material adopts refractory cement.
Coal-burning boiler intermediate-frequeney point firearm of the present invention, wherein said cooling medium is a water.
Coal-burning boiler intermediate-frequeney point firearm of the present invention, the DC injection braking electric current of wherein said superconducting magnetic iron coil is 800-1000A.
The advantage of coal-burning boiler intermediate-frequeney point firearm of the present invention is: owing to adopt the intermediate frequency high frequency heating coil, the temperature of honeycomb duct self is risen rapidly, and when temperature reached 1000 ℃-1500 ℃, air blast was blown into coal dust, coal dust is injected to be lighted, and has realized non-oil ignition.This equipment quick heating, energy consumption is low, equipment investment is little, easy and simple to handle, can be widely used in various coal-burning boilers such as thermal power plant and open furnace igniting.
The present invention is described in detail below with reference to accompanying drawings and in conjunction with the embodiments.
Description of drawings
Fig. 1 is the structure cutaway view of coal-burning boiler intermediate-frequeney point firearm of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment
Coal-burning boiler intermediate-frequeney point firearm of the present invention is a principle of utilizing eddy-current heating, and special honeycomb metal pipe is heated to uniform temperature, make the wind of the honeycomb duct of flowing through and fine breeze mixture at the mouth of pipe place burning light a fire.
See figures.1.and.2, coal-burning boiler intermediate-frequeney point firearm of the present invention comprises injector shell 3, and injector shell 3 is a tetragonal body, built-in honeycomb duct 5 and heater coil 1.Honeycomb duct 5 adopts metal or graphite lining pottery to make, and honeycomb duct 5 is provided with the uniform multilayer through hole 51 of ring-type vertically, and an end of honeycomb duct 5 is provided with blast orifice 52, and the other end is provided with jet 53.When igniter used, the blast orifice 52 of honeycomb duct 5 was connected with the air blast that is blown into coal dust, and jet 53 is used for the boiler by spraying igniting.Heater coil 1 adopts copper tube to make ring bodies, and ring bodies is looped around the outside of honeycomb duct 5, is filled with fire-resistant heat insulating material 4 between injector shell 3 and the honeycomb duct 5, and fire-resistant heat insulating material 4 adopts refractory cement.Heater coil 1 two ends self-injection device shell 3 sidewalls stretch out and are provided with pair of terminal 42, and intermediate frequency power supply is connected with heater coil 1 by this pair of end 42.The ring bodies of heater coil 1 is respectively equipped with inlet 41 and outlet 43 at two ends, recirculated cooling water 2 41 feeds heater coils 1 through entering the mouth, and discharges and circulate from exporting 43, is used to cool off heater coil 1.
In the embodiment of coal-burning boiler intermediate-frequeney point firearm of the present invention, heater coil 1 is divided into two parts, with reference to Fig. 1, a part is provided with pair of terminal 42, and enter the mouth 41 and the outlet 43, another part be provided with another to terminal 42 ', and another the inlet 41 ' and another the outlet 43 '.
The length of honeycomb duct 5 is 50-1000mm, and the diameter of through hole 51 is 10-30mm, and through hole 51 is provided with the 2-7 layer.In the embodiment of coal-burning boiler intermediate-frequeney point firearm of the present invention, the length of honeycomb duct 5 is 200mm, and the diameter of through hole is 20mm, and through hole is provided with 4 layers, can select diameter big at the through hole of central axis, for example 30mm.
Below the course of work of coal-burning boiler intermediate-frequeney point firearm of the present invention is explained.
At first, the blast orifice 52 of honeycomb duct 5 is connected with the air blast that is blown into coal dust, at inlet 41 and between exporting 43 and another inlet 41 ' and another outlet 43 ' between in parallel feed recirculated cooling water 2, and the intermediate frequency power supply of electric current of intermediate frequency output that will have a 5KHz-20KHz is by terminal 42 and another heater coil 1 to terminal 42 ' access point firearm in parallel.Behind the middle and high frequency current direction of 5KHz-20KHz heater coil 1, the strong flux of polarization instantaneous variation in heater coil 1, strong flux will connect the whole honeycomb duct 5 that is placed in the heater coil 1, in very big, opposite with the heating current direction vortex flow of the inner generation of pipe, interior resistance by honeycomb duct 5 produces Joule heat, and the temperature of honeycomb duct 5 self is risen rapidly.When temperature reached 1000 ℃-1500 ℃, the wind speed of adjusting air blast was 5-35m/s, and (the aerial content of coal dust is 0.4-1.0Kg/m with coal dust
3) be blown into honeycomb duct 5, will injectedly light at jet 53 coal dusts, thereby various coal-burning boilers are opened furnace igniting.In ignition process, regulate the electric current holding power in real time, guarantee that the coal dust that constantly blows out honeycomb duct 5 burns away.This equipment can be widely used in various coal-burning boilers such as thermal power plant and open furnace igniting, and its advantage is that quick heating, energy consumption are low, equipment investment is little, easy and simple to handle, can realize non-oil ignition.
Above-described embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; do not breaking away under the prerequisite that the present invention relates to spirit; various distortion and improvement that the common engineers and technicians in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (7)
1. coal-burning boiler intermediate-frequeney point firearm, comprise injector shell (3), it is characterized in that: also comprise built-in honeycomb duct (5) and heater coil (1), described honeycomb duct (5) is provided with the uniform multilayer through hole (51) of ring-type vertically, one end of described honeycomb duct (5) is provided with and is used for the blast orifice (52) that is connected with the air blast that is blown into coal dust, and the other end of described honeycomb duct (5) is provided with the jet (53) that is used for the boiler by spraying igniting; Described heater coil (1) adopts copper tube to make ring bodies, described ring bodies is looped around described honeycomb duct (5) outside, be filled with fire-resistant heat insulating material (4) between described injector shell (3) and the described honeycomb duct (1), described heater coil (1) two ends are stretched out and are respectively equipped with from described injector shell (3) sidewall and are used for the terminal (42) that is connected with intermediate frequency power supply, and described ring bodies two ends are respectively equipped with inlet (41) and the outlet (43) that is used for circulating cooling medium (2).
2. coal-burning boiler intermediate-frequeney point firearm according to claim 1, it is characterized in that: wherein said honeycomb duct (5) adopts metal or graphite lining pottery to make, the length of described honeycomb duct (5) is 50-1000mm, the diameter of described through hole (51) is 10-30mm, and described through hole (51) is provided with the 2-7 layer.
3. coal-burning boiler intermediate-frequeney point firearm according to claim 1 and 2, it is characterized in that: wherein said heater coil (1) is divided into two parts, described heater coil (1) another part be provided be used for being connected with intermediate frequency power supply another to terminal (42 '), and be used for another inlet (41 ') and another outlet (43 ') that feeds circulating cooling medium (2) in parallel.
4. coal-burning boiler intermediate-frequeney point firearm according to claim 3 is characterized in that: the wind speed of wherein said air blast is 5-35m/s, and the aerial content of coal dust is 0.4-1.0Kg/m
3
5. coal-burning boiler intermediate-frequeney point firearm according to claim 4 is characterized in that: wherein said intermediate frequency power supply has the electric current of intermediate frequency output of 5KHz-20KHz.
6. coal-burning boiler intermediate-frequeney point firearm according to claim 5 is characterized in that: wherein said fire-resistant heat insulating material (4) adopts refractory cement.
7. coal-burning boiler intermediate-frequeney point firearm according to claim 6 is characterized in that: wherein said cooling medium (2) is a water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102402916A CN101440966B (en) | 2008-12-22 | 2008-12-22 | Intermediate-frequency igniter of coal-burning boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102402916A CN101440966B (en) | 2008-12-22 | 2008-12-22 | Intermediate-frequency igniter of coal-burning boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101440966A CN101440966A (en) | 2009-05-27 |
| CN101440966B true CN101440966B (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102402916A Expired - Fee Related CN101440966B (en) | 2008-12-22 | 2008-12-22 | Intermediate-frequency igniter of coal-burning boiler |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108343952B (en) * | 2018-03-29 | 2023-09-01 | 山西文龙中美环能科技股份有限公司 | Self-starting pulverized coal burner |
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- 2008-12-22 CN CN2008102402916A patent/CN101440966B/en not_active Expired - Fee Related
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| CN101440966A (en) | 2009-05-27 |
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Granted publication date: 20101117 Termination date: 20131222 |