CN200993389Y - Electric ignition pulverized coal burner - Google Patents
Electric ignition pulverized coal burner Download PDFInfo
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- CN200993389Y CN200993389Y CN 200620166650 CN200620166650U CN200993389Y CN 200993389 Y CN200993389 Y CN 200993389Y CN 200620166650 CN200620166650 CN 200620166650 CN 200620166650 U CN200620166650 U CN 200620166650U CN 200993389 Y CN200993389 Y CN 200993389Y
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- pulverized coal
- combustion chamber
- electric
- coal burner
- electric heater
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Abstract
The utility model discloses an electric igniting coal-powder burner, pertains to the technical field of coal-powder combustion, which comprises an electric heater and a cannula. The electric heater is cylindrical, the cannula is looped outside the electric heater. Between the electric heater and the cannula, a loop type cavity is formed, one end of which is closed, another end is open. On the cannula at the closed end of the cavity, a tangential air inlet is provided. The electric igniting coal-powder burner ignites by electric heating, the igniting speed is high, is applicable for big, middle and small coal powder burners. The electric igniting coal-powder burner can keep the self-restraint combustion of the coal powder, and the coal powder combusts fully in the cavity, the all-burnt rate of the coal power is improved and pollution is reduced. The utility model is of simple structure, easy to control and applicable for automatic boilers.
Description
Technical field
The utility model discloses a kind of electric firing pulverized coal burner, belong to coal powder burning technology field.
Background technology
The coal resources reserves of China are abundant, and coal is one of main energy sources of China's industrial production, domestic life.Pulverized coal combustion is one of effective ways of at present abundant burning coal, and coal dust firing efficient height pollutes few.But also there are many difficult problems that do not have fine solution at present in pulverized coal combustion.One of them difficult problem is the pulverized coal ignition difficulty, because the burning-point of coal dust is higher, be difficult for lighting fast with general ignition method, in large-sized station boiler, adopt the mode of oil drop fire or plasma ignition at present, the oil drop fire will consume great amount of fuel oil, and equipment complexity, the duration of ignition are long; Plasma ignition equipment complexity costs an arm and a leg, so coal dust firing generally can only use very difficult employing the in the medium and small boiler on large-sized station boiler.Another difficult problem of coal dust firing is that coal dust can not be kept self-sustaining burning in present coal burner, generally be under the combustion-supporting effect of igniting fuel combustion or plasma, coal dust is lighted, use the flame heat boiler furnace, it is reached a high temperature, light a fire this moment oil plant or plasma just can be closed, and coal dust is kept burning under the high temperature action of boiler furnace, therefore coal dust is heated inhomogeneous in the combustion chamber, it is insufficient to burn, and burn-off rate is low, pollutes also big.
The utility model content
The purpose of this utility model is a kind of electric firing pulverized coal burner of invention, adopts the electric heat ignition mode, can use on large, medium and small coal burner.Coal dust can be kept self-sustaining burning in electric firing pulverized coal burner simultaneously, improves the coal dust burn-off rate, reduces and pollutes.
The technical solution of the utility model is made up of electric heater and sleeve pipe, the electric heater external form is a cylinder, casing pipe sleeve is contained in the outside of electric heater, between electric heater and sleeve pipe, form an annular cavity, the one end sealing of annular cavity, the other end opens wide, and has a tangent air inlet on the sleeve pipe of annular cavity blind end.
Described electric heater is made up of heating wire and refractory stove core, and heating wire is wrapped in the refractory stove core.
Described electric heater is made up of Elema and refractory stove core, and Elema is installed in the refractory stove core.
The center of described refractory stove core has circular hole, as the secondary air mouth.
Refill one or more sleeve pipes in described outside of sleeve, between per two sleeve pipes, form an annular cavity, the end sealing of these annular cavities, the other end opens wide, and has the secondary air mouth on each sleeve pipe on the blind end of annular cavity.
Front end at electric heater and sleeve pipe is equipped with the combustion chamber, is with pre-warm-air pipe on the furnace wall of combustion chamber, and the outlet of pre-warm-air pipe communicates with the secondary air mouth.
In the described combustion chamber flame retardant coating is housed, flame retardant coating has heat-insulation layer outward.
The below of described combustion chamber has coal dust ash feeder.
The lower end of described coal dust ash feeder has the ash discharge spiral handspike.
The designed electric firing pulverized coal burner of the utility model has following advantage:
1. adopt the electric heat ignition mode, speed of ignition is fast, is applicable to large, medium and small coal burner.Because electrically-fired electric heater volume is little, electrical heating power is easy to adjust, and heat temperature raising is fast, therefore can use in large, medium and small coal burner.Electric heater is simple in structure in addition, and power supply is convenient, does not need the oil-servicing facilities of bulky complex, and is therefore easy to use flexible.
2. can keep the self-sustaining burning of coal dust.Coal dust is with after air mixes, the annular cavity inside spin that enters between electric heater and the sleeve pipe from the tangent air inlet of sleeve pipe advances, the intensification of being heated is gradually taking fire near the annular cavity exit, and the flame that forms rotary combustion outwards sprays, the refractory stove core of burned flame while heating muff and electric heater, keep the temperature field of annular cavity, for follow-up coal dust carries out preheating, and then burning, form self-sustaining burning, this moment, electric heater can cut off the power supply.
3. coal dust is abundant in the annular cavity internal combustion, improves the burn-off rate of coal dust, reduces and pollutes.
4. simple in structure, control is convenient, is suitable for the automation burning boiler.
5. because electric firing pulverized coal burner can be installed a plurality of sleeve pipes, between per two sleeve pipes, form an annular cavity, each annular cavity has the secondary air mouth, form the multilayer annular cavity, each annular cavity can lead to secondary wind or coal dust and air mixing wind at interval respectively, the flame that forms the multilayer coal dust firing outwards sprays, and forms large-scale electric firing pulverized coal burner.
Description of drawings
Fig. 1 is a kind of structural representation of electric firing pulverized coal burner
Fig. 2 is the A-A cutaway view of Fig. 1
Fig. 3 is the structural representation of second kind of electric firing pulverized coal burner
Fig. 4 is the B-B cutaway view of Fig. 3
Fig. 5 is the structural representation of the third electric firing pulverized coal burner
Fig. 6 is the C-C cutaway view of Fig. 5
Fig. 7 is the structural representation of the 4th kind of electric firing pulverized coal burner
Fig. 8 is the D-D cutaway view of Fig. 7
Fig. 9 is the structural representation of the 5th kind of electric firing pulverized coal burner
Figure 10 is the E-E cutaway view of Fig. 9
The specific embodiment
The structural representation of the described electric firing pulverized coal burner of present embodiment is seen Fig. 1, shown in Figure 2.
Electric firing pulverized coal burner is made up of electric heater 1 and sleeve pipe 2, and electric heater 1 is made up of combustion chamber 3 and heating wire 4, and combustion chamber 3 is made by refractory material, and its profile is cylindrical, in the duct is arranged, heating wire 4 is wrapped in the duct of combustion chamber 3.Sleeve pipe 2 is made by steel pipe, is sleeved on electric heater 1 outside, forms an annular cavity 5 between sleeve pipe 2 and the electric heater 1, the end sealing of annular cavity 5, and the other end opens wide.On the sleeve pipe 2 of the blind end of annular cavity 5, have a tangent air inlet 6.
During electric firing pulverized coal burner work, give heating wire 4 energisings, make its heating combustion chamber 3 and sleeve pipe 2.After coal dust and air mix, enter annular cavity 5 from tangent air inlet 6, coal dust rotates on one side and advances in annular cavity 5, contact with sleeve pipe 2 with combustion chamber 3 on one side, heat up gradually, in the end and the exit of annular cavity 5, coal dust reaches burning-point, take fire, the flame that forms rotary combustion outwards sprays.Burned flame is heating muff 2 and combustion chamber 3 simultaneously, keeps the temperature field in the annular cavity 5, is follow-up pulverized coal preheating, and then makes its burning, has formed the self-sustaining burning of coal dust, can stop this moment to heating wire 4 energisings.
This electric firing pulverized coal burner igniting is convenient, is applicable in large, medium and small coal burner and uses.Simultaneously this electric firing pulverized coal burner can self-sustaining burning, and coal dust is heated evenly, and sufficient combustion has improved the burn-off rate of coal dust, has reduced pollution.
The structural representation of the described electric firing pulverized coal burner of present embodiment is seen Fig. 3, shown in Figure 4.
The structure of the structure of the described electric firing pulverized coal burner of present embodiment and embodiment 1 described electric firing pulverized coal burner is basic identical.Difference is that heating adopts Elema 7, and Elema 7 is installed in the combustion chamber 3, and the centre of combustion chamber 3 has secondary air mouth 8.
The operation principle of the described electric firing pulverized coal burner of present embodiment is described identical with embodiment 1, but owing to have secondary air mouth 8, secondary wind can be sent into secondary air mouth 8, air is by combustion chamber 3 time, by combustion chamber 3 preheatings, enter then in the combustion flame of a wind, increased the efficiency of combustion of electric firing pulverized coal burner.
The structural representation of the described electric firing pulverized coal burner of present embodiment is seen Fig. 5, shown in Figure 6.
The structure of the described electric firing pulverized coal burner of present embodiment is in the outside of embodiment 1 described electric firing pulverized coal burner a sleeve pipe 9 to be installed again, between sleeve pipe 9 and sleeve pipe 2, formed an annular cavity 10 again, the one end sealing of annular cavity 10, the other end opens wide, and has secondary air mouth 11 on the sleeve pipe 9 of the blind end of annular cavity 10.
The basic functional principle of the described electric firing pulverized coal burner of present embodiment is described identical with embodiment 1, difference is that sleeve pipe 2 and sleeve pipe 9 are by flame heat, in annular cavity 10, form a temperature field, the air of secondary wind enters preheating in the annular cavity 10 by overfiren air port 11, then enter in the flame of coal dust firing and burn, increased the efficiency of combustion of coal burner.
The structural representation of the described electric firing pulverized coal burner of present embodiment is seen Fig. 7, shown in Figure 8.
The structure of the described electric firing pulverized coal burner of present embodiment is that the front end at embodiment 2 described electric firing pulverized coal burners is equipped with combustion chamber 12, has pre-warm-air pipe 13 on the furnace wall of combustion chamber 12, and the outlet of pre-warm-air pipe 13 communicates with secondary air mouth 8.Flame retardant coating 14 also is housed, the flame retardant coating 14 outer heat-insulation layers 15 that have on the furnace wall of combustion chamber 12.
The basic functional principle of the described electric firing pulverized coal burner of present embodiment is described identical with embodiment 2, difference is that the air of secondary wind is introduced in the pre-warm-air pipe 13 of combustion chamber 12 after the preheating, enter heating again in the combustion chamber 3 by overfiren air port 8 again, then enter in the flame of coal dust firing and burn, increase the efficiency of combustion of coal burner.Owing to have combustion chamber 12, coal dust can further fully burn in combustion chamber 12, has improved the burn-off rate of coal dust, reduces and pollutes.
The power output of the described electric firing pulverized coal burner of present embodiment is big, and coal dust burn-off rate height, pollution are lacked.
The structural representation of the described electric firing pulverized coal burner of present embodiment is seen Fig. 9, shown in Figure 10.
The structure of the described electric firing pulverized coal burner of present embodiment is that the front end at embodiment 3 described electric firing pulverized coal burners is equipped with combustion chamber 12, has pre-warm-air pipe 13 on the furnace wall of combustion chamber 12, and the outlet of pre-warm-air pipe 13 communicates with secondary air mouth 11.Flame retardant coating 14 also is housed, the flame retardant coating 14 outer heat-insulation layers 15 that have on the furnace wall of combustion chamber 12.The below of combustion chamber 12 has coal dust ash feeder 16, ash discharge spiral handspike 17 is housed below the coal dust ash feeder 16.
The basic functional principle of the described electric firing pulverized coal burner of present embodiment is described identical with embodiment 3, difference is that the air of secondary wind is introduced in the pre-warm-air pipe 13 of combustion chamber 12 after the preheating, enter heating again in the annular cavity 10 by overfiren air port 11 again, then enter in the flame of coal dust firing and burn, increase the efficiency of combustion of coal burner.Owing to have combustion chamber 12, coal dust can further fully burn in combustion chamber 12, has improved the burn-off rate of coal dust, reduces and pollutes.Coal ash behind the coal dust firing enters coal dust ash feeder 16 simultaneously, releases combustion chamber 12 by ash discharge spiral handspike 17, realizes the automatic collection work of coal dust ash.
The power output of the described electric firing pulverized coal burner of present embodiment is big, and coal dust burn-off rate height, pollution are lacked.
Claims (9)
1. electric firing pulverized coal burner, it is characterized in that: form by electric heater and sleeve pipe, the electric heater external form is cylindrical, casing pipe sleeve is contained in the outside of electric heater, between electric heater and sleeve pipe, form an annular cavity, the one end sealing of annular cavity, the other end opens wide, and has a tangent air inlet on the sleeve pipe of annular cavity blind end.
2. electric firing pulverized coal burner according to claim 1, so its feature also exists: described electric heater is made up of heating wire and combustion chamber, and heating wire is wrapped in the combustion chamber.
3. electric firing pulverized coal burner according to claim 1, so its feature also exists: described electric heater is made up of Elema and combustion chamber, and Elema is installed in the combustion chamber.
4. electric firing pulverized coal burner according to claim 1, so its feature also exists: the combustion chamber center of described electric heater has circular hole, as the secondary air mouth.
5. electric firing pulverized coal burner according to claim 1, so its feature also exists: refill one or more sleeve pipes in described outside of sleeve, between per two sleeve pipes, form an annular cavity, the one end sealing of these annular cavities, the other end opens wide, and has the secondary air mouth on each sleeve pipe on the blind end of annular cavity.
6. electric firing pulverized coal burner according to claim 1, so its feature also exists: the front end at electric heater and sleeve pipe is equipped with the combustion chamber, is with pre-warm-air pipe on the furnace wall of combustion chamber, the outlet of pre-warm-air pipe communicates with the secondary air mouth.
7. electric firing pulverized coal burner according to claim 6, so its feature also exists: in the described combustion chamber flame retardant coating is housed, flame retardant coating has heat-insulation layer outward.
8. electric firing pulverized coal burner according to claim 6, so its feature also exists: the below of described combustion chamber has coal dust ash feeder.
9. electric firing pulverized coal burner according to claim 8, so its feature also exists: the lower end of described coal dust ash feeder has the ash discharge spiral handspike.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620166650 CN200993389Y (en) | 2006-12-20 | 2006-12-20 | Electric ignition pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620166650 CN200993389Y (en) | 2006-12-20 | 2006-12-20 | Electric ignition pulverized coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200993389Y true CN200993389Y (en) | 2007-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620166650 Expired - Fee Related CN200993389Y (en) | 2006-12-20 | 2006-12-20 | Electric ignition pulverized coal burner |
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| CN (1) | CN200993389Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072651A (en) * | 2011-01-04 | 2011-05-25 | 中冶南方(武汉)威仕工业炉有限公司 | Heat accumulating type heating furnace totally using blast furnace gas as fuel |
-
2006
- 2006-12-20 CN CN 200620166650 patent/CN200993389Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072651A (en) * | 2011-01-04 | 2011-05-25 | 中冶南方(武汉)威仕工业炉有限公司 | Heat accumulating type heating furnace totally using blast furnace gas as fuel |
| CN102072651B (en) * | 2011-01-04 | 2013-01-09 | 中冶南方(武汉)威仕工业炉有限公司 | Heat accumulating type heating furnace totally using blast furnace gas as fuel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: WANG DONGMING ^ |
|
| CU01 | Correction of utility model patent |
Correction item: Co-patentee Correct: Wang Dongming Number: 51 Page: The title page Volume: 23 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Co-patentee Correct: Wang Dongming Number: 51 Volume: 23 |
|
| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ^ TO: WANG DONGMING ^ |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |