CN2186351Y - No-oil classification electric igniting and low-load steady burning device of coal powder - Google Patents
No-oil classification electric igniting and low-load steady burning device of coal powder Download PDFInfo
- Publication number
- CN2186351Y CN2186351Y CN 93232763 CN93232763U CN2186351Y CN 2186351 Y CN2186351 Y CN 2186351Y CN 93232763 CN93232763 CN 93232763 CN 93232763 U CN93232763 U CN 93232763U CN 2186351 Y CN2186351 Y CN 2186351Y
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- electric heating
- heating tube
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- igniting
- coal powder
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Abstract
The utility model discloses a no-oil classification electric igniting and a low-load steady burning device of coal powder, which is provided with a central electric heating pipe (rod) arranged in a primary air burner nozzle, a thermal insulation material layer, a two-stage coal powder air current air pipe, an automatic regulation device, wherein, the central electric heating tube (rod) and the thermal insulation material layer are supported by a support. The inside and the outside of the central electric heating tube are respectively provided with a dregs proof sleeve and a sandwich dregs proof blast pipe. The coal powder air current air pipe is three stages or more, and each stage coal powder air current air pipe is respectively provided with a coal powder air current air pipe inlet pipe. The central electric heating tube is an electric heating pipe with micropore structure, or a silicon carbon tube.
Description
The utility model relates to pulverized coal boiler ignition and low-load combustion-stabilizing device, especially relates to pulverized-fuel boiler oil-less step electric igniting and peak-regulating low-load automatic stable burning device.
Burner is the key equipment of boiler, is the organizer of fuel stable ignition burning, and therefore, the performance of burner quality meeting ground directly has influence on the security and the economy of boiler operatiopn.China has a large capacity and a wide range at present, the maximum thermal power plant's pulverized-coal fired boiler of consume fuel is stablized when combustion-supporting in igniting or at underload, all be in burner, set up an office kerosene rifle even big capacity oil gun, when ignition of the boiler, use a large amount of fuel oil earlier, make and drop into coal dust after temperature is raised to certain value in the stove, cause unstable combustion regularly at low-load combustion-stabilizing and other reason, it is combustion-supporting also to drop into oil gun, this method of operation can satisfy safe operation of the boiler, but needs to consume a large amount of fuel oil, or even the high-quality light diesel fuel.According to statistics, the each igniting of 670t/h pulverized-coal fired boiler needs more than the fuel oil 55t/h, and be used for combustion-supporting fuel oil more than 1000 tons every year.At present, the fuel oil that China is used to light a fire every year reaches more than 500,000 tons, and appropriate litigation fees is considerable, and along with developing rapidly of China's industrial economy, more much types power plant will be constructed and put into operation, and this problem will be outstanding further.Moreover in recent years, China's fuel oil supply wretched insufficiency, the oil price costliness, relevant department is the important indicator of generating oil consumption as a measurement benefit.
For this reason, domestic and international many units and scholar propose various novel combustion technologies, attempt to reduce the pulverized-coal fired boiler fuel consumption, strengthen the smooth combustion of catching fire but all rest on, and reduce the oil consumption stage, need not just can not light a fire or combustion-supporting purpose by oil and reach.As bluff body burner, the ship shape multifunctional burner, the high speed difference jet, technology such as pre-combustion chamber burner in the overheavy firing of coal dust stable ignition, particularly at colm, all have important breakthrough, obtain encouraging success.Igniting also can fuel savings oil when the low-load combustion-stabilizing, it is reported that the saving rate can reach 60～70%, but still not have thoroughly to change or eliminate the method that tradition is used the oil drop fire, the fuel oil total amount that disappears still very considerable.Abroad, as U.S. combustion enginnering company, Mitsubishi heavy industry company etc. have also developed various coal powder light-dark isolation technics and burner in recent years in succession, aspect coal dust (particularly colm) the reinforcement ignition smooth combustion remarkable result is being arranged, but aspect oily, still having similar problem.U.S. company is the plasma direct-fire technology of exploitation recently, can save but fuel oil, but price is very expensive, embarrasses the user to accept.
The purpose of this utility model provides a kind of pulverized-fuel boiler oil-less step electric igniting and peak-regulating low-load automatic stable burning device.
Elaborate below in conjunction with accompanying drawing.
Fig. 1 is pulverized-fuel boiler oil-less step electric igniting and peak-regulating low-load automatic stable burning device I type schematic diagram;
Fig. 2 is pulverized-fuel boiler oil-less step electric igniting and peak-regulating low-load automatic stable burning device II type schematic diagram.
This device is to have center electric heating tube (rod) 1, inside and outside the electric heating tube of center, be respectively equipped with anti-slag sleeve pipe 2, interlayer is prevented slag airduct 3, between interlayer airduct and center pipe, one layer of heat preservation material layer 4 is arranged, prevent that at interlayer slag airduct and insulation material outside are secondary breeze airflow airducts 5, secondary air flow airduct outside can be arranged breeze airflow airduct more than three grades or three grades as required, and breeze airflow airducts at different levels can be provided with breeze airflow airduct inlet tube separately. Add thermal source and adopt electrical heating elements, its material can be selected the electric heating tube with the micropore structure, carborunbum tube (rod), stainless steel etc. In order to prevent the heating tube slagging scorification, utilize interlayer gentle breeze to pass element micropore structure, form air film at the heating tube inwall. Namely protect heating tube, prevent slagging scorification, can regulate as required again temperature and ignition location in the heating tube, the visual concrete condition of the anti-slag airduct of interlayer changes the airduct size, even cancellation. The anti-slag sleeve pipe of heating tube inside have band micropore structure with two kinds not with holes, visual ature of coal slagging scorification and interlayer wind deployment scenarios are determined. Center electric heating tube and heat-insulation layer etc. are by support 6 supportings. Center electric heating tube (rod) is connected to automatic regulator for ignition 7. Adapt to the boiler load variations with the igniting auto-adjustment control, particularly during peak-regulating low-load, can automatically drop into as required smooth combustion apparatus, and not need to throw oil.
Advantage of the present utility model: (1) namely is igniter, is again main burner; (2) realized that coal dust does not have oily multistage reinforcement igniting and stable burning; (3) when underload, need not combustion-supporting oil The automatic steady combustion; (4) speed of ignition is fast, and is simple to operate, and power consumption is low; (5) device is simple, small investment, long service life; (6) the utility model both can be used for large-sized station boiler igniting and steady combustion, also can be used for small and medium-sized industrial coal powder boilers and kiln, and applicability is strong.
Claims (5)
1, a kind of coal dust does not have oil content step electric igniting and low-load combustion-stabilizing device, it is characterized in that it has the center electric heating tube (rod) [1] that is installed on a wind combustor jet pipe, outside center electric heating tube (rod), be provided with adiabator layer [4] and secondary breeze airflow airduct [5], on center electric heating tube (rod), be connected to igniting automatic control set for adjusting [7], center electric heating tube (rod), adiabator layer is supported by support [6].
2, a kind of coal dust according to claim 1 does not have oil content step electric igniting and low-load combustion-stabilizing device, it is characterized in that being respectively equipped with anti-slag sleeve pipe ［ 2 ］ inside and outside the electric heating tube of said center, and interlayer is prevented slag airduct ［ 3 ］.
3, a kind of coal dust according to claim 1 and 2 does not have oil content step electric igniting and low-load combustion-stabilizing device, it is characterized in that said breeze airflow airduct is more than three grades or three grades.
4, a kind of coal dust according to claim 1 and 2 does not have oil content step electric igniting and low-load combustion-stabilizing device, it is characterized in that the electric heating tube of said center electric heating tube for the band microcellular structure, carborunbum tube.
5, a kind of coal dust according to claim 1 and 2 does not have oil content step electric igniting and low-load combustion-stabilizing device, it is characterized in that said breeze airflow airduct at different levels, is respectively equipped with breeze airflow airduct inlet tube separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232763 CN2186351Y (en) | 1993-12-18 | 1993-12-18 | No-oil classification electric igniting and low-load steady burning device of coal powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232763 CN2186351Y (en) | 1993-12-18 | 1993-12-18 | No-oil classification electric igniting and low-load steady burning device of coal powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2186351Y true CN2186351Y (en) | 1994-12-28 |
Family
ID=33808888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93232763 Expired - Fee Related CN2186351Y (en) | 1993-12-18 | 1993-12-18 | No-oil classification electric igniting and low-load steady burning device of coal powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2186351Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901094A (en) * | 2011-07-29 | 2013-01-30 | 宜兴天地节能技术有限公司 | Multi-tube direct injection type high-voltage electric pulse heating combustor |
-
1993
- 1993-12-18 CN CN 93232763 patent/CN2186351Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901094A (en) * | 2011-07-29 | 2013-01-30 | 宜兴天地节能技术有限公司 | Multi-tube direct injection type high-voltage electric pulse heating combustor |
| CN102901094B (en) * | 2011-07-29 | 2016-03-16 | 宜兴天地节能技术有限公司 | A kind of multiple-pipe direct spray high-voltage electric impulse heating burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |