CN201203143Y - Intermediate-frequency and high-frequency igniter of coal-burning boiler - Google Patents
Intermediate-frequency and high-frequency igniter of coal-burning boiler Download PDFInfo
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- CN201203143Y CN201203143Y CNU2008200794862U CN200820079486U CN201203143Y CN 201203143 Y CN201203143 Y CN 201203143Y CN U2008200794862 U CNU2008200794862 U CN U2008200794862U CN 200820079486 U CN200820079486 U CN 200820079486U CN 201203143 Y CN201203143 Y CN 201203143Y
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- coal
- intermediate frequency
- frequency
- burning boiler
- honeycomb duct
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Abstract
The utility model relates to an intermediate frequency and high frequency igniter in a coal burning boiler, which comprises an ejector housing, a built-in honeycomb pipe and a heating coil, wherein, the honeycomb pipe is provided with multiple-layer trough holes which are annularly distributed along an axial direction, a blower nozzle connected with a blast blower for blowing coal powder, and an ejection nozzle used for the ejection ignition of the boiler; the heating coil is an annular body made from copper pipes; the annular body is circled outside the honeycomb pipe; fire resistance and heat insulation materials are filled between the ejector housing and the honeycomb pipe; and the heating coil is provided with a terminal used for connecting an intermediate frequency power supply or a high frequency power supply, and an inlet and an outlet which are used for circulating cooling media. The utility model has the advantages that because of the intermediate frequency heating coil, the temperature of the honeycomb pipe rises; when the temperature reaches 1000 to 1500 DEG C, coal powder is blown by the blast blower and is ignited in the mode of ejection; and oil-free ignition is realized. The device has quick temperature rise, low energy consumption, simple operation, little investment and wide application, and can be widely used for the starting-up ignition of various coal burning boilers.
Description
Technical field
The utility model relates to boiler plant, particularly relates to a kind of coal-burning boiler intermediate frequency high-frequency igniter.
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.
The utility model content
The purpose of this utility model is exactly in order to overcome above defective, provides a kind of non-oil ignition of realizing, quick heating, the coal-burning boiler intermediate frequency high-frequency igniter that energy consumption is low, investment is little, easy and simple to handle.
For achieving the above object, the coal-burning boiler intermediate frequency high-frequency igniter that the utility model provides, 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 is used for the blast orifice that is connected with the air blast that is blown into coal dust and is used for the jet that boiler by spraying is lighted a fire; 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 or high frequency electric source, and ring bodies is provided with the entrance and exit that is used for circulating cooling medium respectively at the two-terminal place.
The utility model coal-burning boiler intermediate frequency high-frequency igniter, the length of wherein said honeycomb duct is 50-400mm, and the diameter of through hole is 10-30mm, and through hole is provided with the 2-5 layer.
The utility model coal-burning boiler intermediate frequency high-frequency igniter, wherein said heater coil is divided into two parts, is respectively equipped with to be used for first inlet, second inlet and first outlet, second outlet that feeds circulating cooling medium in parallel.
The utility model coal-burning boiler intermediate frequency high-frequency igniter, the wind speed of wherein said air blast is 5-30m/s, coal dust and Air mixing concentration are 0.5:1.2.
The utility model coal-burning boiler intermediate frequency high-frequency igniter, wherein said intermediate frequency or high frequency electric source have intermediate frequency or the high frequency electric output of 5KHz-20KHz.
The utility model coal-burning boiler intermediate frequency high-frequency igniter, wherein said fire-resistant heat insulating material adopts refractory cement.
The utility model coal-burning boiler intermediate frequency high-frequency igniter, wherein said cooling medium is a water.
The utility model coal-burning boiler intermediate frequency high-frequency igniter, the DC injection braking electric current of wherein said superconducting magnetic iron coil is 800-1000A.
The advantage of the utility model coal-burning boiler intermediate frequency high-frequency igniter 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 are low, easy and simple to handle, and its investment is little, of many uses, can be widely used in various coal-burning boilers such as thermal power plant and open furnace igniting.
The utility model is elaborated with reference to accompanying drawing below in conjunction with embodiment.
Description of drawings
Fig. 1 is the structure cutaway view of the utility model coal-burning boiler intermediate frequency high-frequency igniter;
Fig. 2 is A-A cutaway view of Fig. 1.
The specific embodiment
The utility model coal-burning boiler intermediate frequency high-frequency igniter 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, the utility model coal-burning boiler intermediate frequency high-frequency igniter comprises injector shell 3, and injector shell 3 is a tetragonal body, built-in honeycomb duct 5 and heater coil 1.Honeycomb duct 5 is provided with the uniform multilayer through hole 51 of ring-type and blast orifice 52 and jet 53 vertically.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 honeycomb duct 5 outsides, is filled with fire-resistant heat insulating material 4 between injector shell 3 and the honeycomb duct 5, and fire-resistant heat insulating material 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 or high frequency electric source are connected with heater coil 1 by terminal 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 the utility model coal-burning boiler intermediate frequency high-frequency igniter, heater coil 1 is divided into two parts, with reference to Fig. 1, a part be provided with the inlet 41 and the outlet 43, another part be provided with the inlet 41 ' and the outlet 43 '.
The length of honeycomb duct 5 is 50-400mm, and the diameter of through hole 51 is 10-30mm, and through hole 51 is provided with the 2-5 layer.In the embodiment of the utility model coal-burning boiler intermediate frequency high-frequency igniter, 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 the utility model coal-burning boiler intermediate frequency high-frequency igniter is explained.
At first, the blast orifice 52 of honeycomb duct 5 is connected with the air blast that is blown into coal dust, insert recirculated cooling water 2 respectively at inlet 41 and outlet 43, and will have intermediate frequency or the intermediate frequency of high frequency electric output or the heater coil 1 that high frequency electric source passes through terminal 42 access point firearms of 5KHz-20KHz.Behind the middle and high frequency current direction of 5KHz-20KHz heater coil, the strong flux of polarization instantaneous variation in coil, flux will connect placement whole honeycomb duct 5 in coil, 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 reaches 1000 ℃-1500 ℃, the wind speed of adjusting air blast is 5-30m/s, and coal dust is blown into honeycomb duct 5, and to make coal dust and Air mixing concentration be 0.5:1.2, will injectedly light at jet 53 coal dusts, 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, easy and simple to handle, can realize non-oil ignition, and this equipment investment is little, of many uses.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; relate under the prerequisite of spirit not breaking away from the utility model; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.
Claims (7)
1, a kind of coal-burning boiler intermediate frequency high-frequency igniter, comprise injector shell (3), it is characterized in that: also comprise built-in honeycomb duct (5) and heater coil (1), described honeycomb duct is provided with the uniform multilayer through hole (51) of ring-type vertically, and is used for the blast orifice (52) that is connected with the air blast that is blown into coal dust and is used for the jet (53) that boiler by spraying is lighted a fire; 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 or high frequency electric source, 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 frequency high-frequency igniter according to claim 1 is characterized in that: the length of wherein said honeycomb duct (1) is 50-400mm, and the diameter of described through hole (51) is 10-30mm, and described through hole (51) is provided with the 2-5 layer.
3. coal-burning boiler intermediate frequency high-frequency igniter according to claim 1 and 2, it is characterized in that: wherein said heater coil (1) is divided into two parts, is respectively equipped with to be used for first inlet (41), second inlet (41 ') and first outlet (43), second outlet (43 ') that feeds circulating cooling medium (2) in parallel.
4. coal-burning boiler intermediate frequency high-frequency igniter according to claim 3 is characterized in that: the wind speed of wherein said air blast is 5-30m/s, and coal dust and Air mixing concentration are 0.5:1.2.
5. coal-burning boiler intermediate frequency high-frequency igniter according to claim 4 is characterized in that: wherein said intermediate frequency or high frequency electric source have intermediate frequency or the high frequency electric output of 5KHz-20KHz.
6. coal-burning boiler intermediate frequency high-frequency igniter according to claim 5 is characterized in that: wherein said fire-resistant heat insulating material (4) adopts refractory cement.
7. coal-burning boiler intermediate frequency high-frequency igniter 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 |
|---|---|---|---|
| CNU2008200794862U CN201203143Y (en) | 2008-03-19 | 2008-03-19 | Intermediate-frequency and high-frequency igniter of coal-burning boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200794862U CN201203143Y (en) | 2008-03-19 | 2008-03-19 | Intermediate-frequency and high-frequency igniter of coal-burning boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201203143Y true CN201203143Y (en) | 2009-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200794862U Expired - Fee Related CN201203143Y (en) | 2008-03-19 | 2008-03-19 | Intermediate-frequency and high-frequency igniter of coal-burning boiler |
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| Country | Link |
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| CN (1) | CN201203143Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902223A (en) * | 2021-04-19 | 2021-06-04 | 吉林聚能网控科技有限公司 | Special heating core of orifice plate vortex formula oil-free pulverized coal igniter |
| CN112902224A (en) * | 2021-04-19 | 2021-06-04 | 吉林聚能网控科技有限公司 | Secondary orifice plate turbulent flow type oil-free pulverized coal igniter |
-
2008
- 2008-03-19 CN CNU2008200794862U patent/CN201203143Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902223A (en) * | 2021-04-19 | 2021-06-04 | 吉林聚能网控科技有限公司 | Special heating core of orifice plate vortex formula oil-free pulverized coal igniter |
| CN112902224A (en) * | 2021-04-19 | 2021-06-04 | 吉林聚能网控科技有限公司 | Secondary orifice plate turbulent flow type oil-free pulverized coal igniter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20110319 |