CN1361382A - Air-cooled coal powder burner with low-dust liquid state slag exhaust - Google Patents
Air-cooled coal powder burner with low-dust liquid state slag exhaust Download PDFInfo
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- CN1361382A CN1361382A CN 00131024 CN00131024A CN1361382A CN 1361382 A CN1361382 A CN 1361382A CN 00131024 CN00131024 CN 00131024 CN 00131024 A CN00131024 A CN 00131024A CN 1361382 A CN1361382 A CN 1361382A
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Abstract
The present invention is one air-cooled coal powder burner with low-dust liquid state slag exhaust. Structurally, the present invention is featured by that the secondary blast preheating passage around the combustor; the second blast introduction via the annular axial flow blade lattice at combustor inlet to form eddy flow inside the combustor; the slag tap at the tail of the combustor and in an angle of 3-85 deg to perpendicular bisector of the combustor; and the slag recovering chamber with water seal structure and below the slag tap. The present invention has stable burning, high slag trapping rate, smooth slag exhaust and clean fume.
Description
The present invention relates to a kind of architecture advances of liquid deslagging vortex burner of combusting coal fines.
The slag notch of traditional slagging coal combustor is arranged in the bottom of slagging coal combustor perpendicular bisector, as CN86108138A CN2051324U and 99116145.9, the smooth discharge of melt cinder depends on the layout inclination angle and the openings of sizes of burner greatly, discharge from cinder notch by the gravity effect fully, the temperature field is low slightly, promptly may stop up slag-drip opening, seriously restricts the application of burner, the shortcoming of this deslagging mode maximum is when operation cinder notch to take place to stop up, can't slag hitting and removing.Also there is following shortcoming in above-mentioned various burners: barrel and end face adopt water-cooled, because the heat dissipation capacity of water-cooled is excessive, cause combustion chamber temperature on the low side, especially temperature rises too slow when burner starts, had a strong impact on the deslagging smoothly of burner, heat row entrained after cooling water is heated simultaneously causes thermal pollution to cut the reduction thermal efficiency to airspace.
The objective of the invention is at the ubiquitous deslagging problem of existing liquid deslagging vortex burner, propose a kind of can smooth combustion, have high lime-ash capture rate, a deslagging and satisfy the air-cooled type fine coal burner with low-dust liquid state slag exhaust of industrial clean flue gas smoothly.
The present invention adopts following technical pattern: it has a columniform combustion chamber, this combustion chamber comprises an inlet end face and an exit end face, fuel-feed pipe and igniter burner are on inlet end face or combustor sidewalls, the entrance point place of combustion chamber is provided with the identical or circlet oblique crank Z stream leaf grating slightly of the diameter of an external diameter and combustion chamber cylinder shape inner wall face, the exit end face center of combustion chamber is provided with the central outlet pipe, the bottom of exit end face has slag notch, the combustion product that the combustion chamber produces flows out from the central outlet pipe of exit end face, it is characterized in that being provided with secondary wind preheating channel as oxidant along the perisporium of combustion chamber, secondary wind through the preheating channel preheating imports the combustion chamber from said annular axial flow leaf grating, forms annular eddy flow in the combustion chamber; Said slag notch is positioned at the lower wall of combustion chamber barrel, be in the downstream that the longitudinal cross-section of passing the combustion chamber axial line is the swirling eddy direction at interface, the direction of slag notch becomes 3 °～85 ° inclination alpha with the perpendicular bisector of combustion chamber, tape splicing has the lime-ash of sealing structure for water to reclaim the chamber under the slag notch.
The present invention makes the distinguished and admirable secondary wind preheating channel through the combustion chamber perisporium of secondary, enters the combustion chamber through annular axial flow leaf grating again.Distinguished and admirable during when secondary through the cooling duct, both made self to be subjected to preheating, cooled off the burner barrel again, guarantee that its material works under the temperature of allowing, become the air cooling system of combustion chamber.Secondary wind can be preheated to 300 ℃～1000 ℃ through preheating channel, and the secondary wind of preheating is sent into the temperature that burner makes flue gas and reached the ash fusion point (T that various coal produces
3) on, thereby the smooth discharge of assurance melt cinder.Less when simultaneously secondary wind is to the relative water-cooled of amount of cooling water of burner, be beneficial to burner and start fast, make lime-ash form molten state as early as possible and discharge from slag-drip opening.
Said secondary wind preheating channel is made of combustion chamber inner tube wall and outer tube wall, on inner tube wall, be provided with fin, fin adopts vertically (being that the fin direction is identical with burner axis) and rotation direction (being that fin direction of rotation and burner axis have certain inclination angle), and fin is used for improving the wall cooling effectiveness.
In burner, discovery is under the powerful effect of dragging of flue gas stream, melt cinder can be in the inclination angle flows out during greater than 10 °, the present invention just is being based on this phenomenon, propose the slag notch direction and become certain inclination alpha with the burner perpendicular bisector, α is 3 °～85 °, and the best is 5 °～30 °, and to rotate into the formed eddy flow direction of burner consistent with secondary wind.Cinder notch structure of the present invention can play collects that slag drips or the effect of ash particle, improves the capture rate of slag.During actual motion, the melt cinder of fusion is separated from cinder notch swimmingly owing to centrifugal action, reduces the situation that obstruction takes place; Combustor sidewalls has certain tilting position and lays out cinder notch, simultaneously reclaims chamber sidewall design fault cinder cleaning hole at lime-ash, even stop up, slag hitting and dredging easily is in operation.
For guaranteeing that further deslagging is smooth and easy, a warm sludge fume pipe can be set in the lime-ash chamber of recovery connect the afterbody of central outlet pipe or the terminal applies equipment of this burner.A small amount of high-temperature flue gas is flowed through, and lime-ash reclaims the chamber and the warm sludge fume pipe directly enters terminal applies equipment, prevents that slag from reclaiming in the indoor flow process cooling and stop up at lime-ash, guarantees that operation normally.Owing to exist certain pressure reduction in combustor sidewalls and central outlet pipe exit, guarantee always to have a high-temperature flue gas flow path warm sludge fume pipe, when this part high-temperature flue gas is flowed through lime-ash recovery chamber, continue slag heating in it, keep the slag temperature on fusion temperature, assurance is slagged tap smoothly, and this partial fume is last with the tail flue gas merging or enter terminal applies equipment separately.
The shape of said slag notch can be pipe, square tube, conical pipe and irregularly shaped.
The igniter burner of said combustion chamber end import can adopt oil burner or fuel burner nozzle, can or strengthen burning in order to the preheated burning chamber; Igniter burner can enter by the calment burner sidewall, also can enter by the calment burner end face.The optimum igniting mouth is selected between annular axial flow leaf grating.
Though the present invention on structure or performance all be different from traditional liquid deslagging vortex burner.The present invention have traditional liquid deslagging vortex burner the high retention efficiency that can not have and simple, compact structure.The lime-ash capture rate of this burner can reach 85%～98%, is the low dirt clean combustion device of a kind of air-cooled coal powder.This is one and meets China's energy resources situation, is fit to the practical new technology of the replace oil with coal of China's economic technology development level.
Fig. 1 is structural representation of the present invention (this figure is that the A-A of Fig. 3 is to cutaway view);
Fig. 2 is that the C-C of Fig. 1 is to cutaway view;
Fig. 3 is that the B-B of Fig. 1 is to cutaway view;
Fig. 4 is the I place partial enlarged drawing of Fig. 3 barrel;
Fig. 5 is the leaf grating pitch circle expanded view of annular axial flow leaf grating.
Below in conjunction with accompanying drawing embodiments of the present invention are described in further detail:
The air-cooled coal powder burner with low-dust liquid state slag exhaust that present embodiment is used for certain chemical products heating furnace, its basic structure as shown in Figure 1,1 is peep hole, 2 are the igniting oil burner, 3 is fuel (primary wind and powder) feed pipe, 6 is the combustion chamber of this burner, its columniform internal face diameter is 0.85 meter, length is 1.53 meters, be provided with internal diameter at combustor exit end face center and be 0.42 meter central outlet pipe 11, the high temperature semi-coal gas flue gas that the combustion chamber produces outputs to the burning of terminal applies equipment from center outlet 12.Inlet end face 5 places in the combustion chamber are provided with annular axial flow leaf grating 4, this annular axial flow leaf grating pitch diameter is 0.825 meter, the leaf height is 4 centimetres (as shown in Figure 2), the efflux angles β of its cascade blade is 10 ° (as shown in Figure 5), periphery wall in the combustion chamber is provided with secondary wind preheating channel 7, secondary wind inlet 9 is located at the exit end face place of combustion chamber, preheating channel is made of inner tube wall 19 and outer tube wall 21, fin 12 (as shown in Figure 4) is housed on inner tube wall, secondary wind is by inlet 9 inputs, flow through fin 12 and barrel 19, the preheating of 21 passages of forming 7, import the combustion chamber through annular axial flow leaf grating 4, form annular eddy flow in the combustion chamber, make fuel in the combustion chamber, carry out whirlwind suspension combustion and adhesion combustion.The bottom of the exit end face 8 of combustion chamber is provided with slag notch 16, the inclination alpha of the direction of slag notch and burner perpendicular bisector is 15 ° (as shown in Figure 3), melt cinder flows into the lime-ash that has sealing structure for water 14 by slag notch and reclaims chamber 15, the bottom of reclaiming chamber 15 at lime-ash is provided with the not end place that warm sludge fume pipe 13 connects the central outlet pipe 11 that leads to the combustion chamber, a small amount of high-temperature flue gas is flowed through, and lime-ash reclaims the chamber and warm sludge fume pipe 13 directly enters terminal applies equipment, and the heating of high-temperature flue gas can prevent that slag from reclaiming indoor cooling and stop up at lime-ash; The sidewall that reclaims the chamber at lime-ash also is provided with a fault cinder cleaning hole 17, if the obstruction so that slag notch 16 meets accident when operation can be removed by fault cinder cleaning hole 17, guarantees its normal operation.Burner inner tube wall 19 is a heat resisting steel, is welded in the heat-resisting pin 18 (as shown in Figure 4) in the refractory masses 21, and behind the operation certain hour, refractory material partly degrades, and is repaired by the slag shell, forms complete burner inner surface again.800 kilograms of the per hour flammable coal dusts of this burner, the retention efficiency of burner can reach more than 90%.
Claims (5)
1. air-cooled coal powder burner with low-dust liquid state slag exhaust, it has a columniform combustion chamber, this combustion chamber comprises an inlet end face and an exit end face, fuel-feed pipe and igniter burner are on inlet end face or combustor sidewalls, the entrance point place of combustion chamber is provided with the identical or circlet oblique crank Z stream leaf grating slightly of the diameter of an external diameter and combustion chamber cylinder shape inner wall face, the exit end face center of combustion chamber is provided with the central outlet pipe, the bottom of exit end face has slag notch, the combustion product that the combustion chamber produces flows out from the central outlet pipe of exit end face, the perisporium that it is characterized in that along the combustion chamber (6) is provided with the secondary wind preheating channel (7) as oxidant, secondary wind imports the combustion chamber through said annular axial flow leaf grating, said slag notch is positioned at the lower wall of combustion chamber barrel, be in the downstream that the longitudinal cross-section of passing the combustion chamber axial line is the swirling eddy direction at interface, the direction of slag notch becomes 3 °～85 ° inclination alpha with the perpendicular bisector of combustion chamber (6), and tape splicing has the lime-ash of sealing structure for water (14) to reclaim chamber (15) under the slag notch.
2. air-cooled coal powder burner with low-dust liquid state slag exhaust according to claim 1 is characterized in that said lime-ash recovery chamber (15) is provided with a warm sludge fume pipe (13) and connects the afterbody of central outlet pipe (11) or the terminal applies equipment of this burner.
3. air-cooled coal powder burner with low-dust liquid state slag exhaust according to claim 1 is characterized in that said secondary air channel (7) is made of combustion chamber inner tube wall (19) and outer tube wall (21), is provided with fin (12) on inner tube wall (19).
4. air-cooled coal powder burner with low-dust liquid state slag exhaust according to claim 1, the sidewall that the lime-ash that it is characterized in that reclaims chamber (15) is provided with a fault breast hole (17).
5. air-cooled coal powder burner with low-dust liquid state slag exhaust according to claim 1, the igniter burner that it is characterized in that the end import of said combustion chamber is oil burner or fuel burner nozzle, the lighting-up tuyere of igniter burner is located between annular axial flow leaf grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001310240A CN1153018C (en) | 2000-12-29 | 2000-12-29 | Air-cooled coal powder burner with low-dust liquid state slag exhaust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001310240A CN1153018C (en) | 2000-12-29 | 2000-12-29 | Air-cooled coal powder burner with low-dust liquid state slag exhaust |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1361382A true CN1361382A (en) | 2002-07-31 |
| CN1153018C CN1153018C (en) | 2004-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001310240A Expired - Fee Related CN1153018C (en) | 2000-12-29 | 2000-12-29 | Air-cooled coal powder burner with low-dust liquid state slag exhaust |
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| CN (1) | CN1153018C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806453A (en) * | 2010-04-26 | 2010-08-18 | 中国科学院广州能源研究所 | Vertical air-cooled pulverized coal burner capable of realizing continuous slag tapping |
| CN104879747A (en) * | 2015-04-17 | 2015-09-02 | 石家庄新华能源环保科技股份有限公司 | Clean combustion device |
| CN107997559A (en) * | 2016-11-02 | 2018-05-08 | 广东美的生活电器制造有限公司 | Squeezing cup and food cooking machine |
| CN113091053A (en) * | 2021-05-12 | 2021-07-09 | 北京工业大学 | Liquid slag-discharging pulverized coal high-temperature air combustion system |
-
2000
- 2000-12-29 CN CNB001310240A patent/CN1153018C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806453A (en) * | 2010-04-26 | 2010-08-18 | 中国科学院广州能源研究所 | Vertical air-cooled pulverized coal burner capable of realizing continuous slag tapping |
| CN104879747A (en) * | 2015-04-17 | 2015-09-02 | 石家庄新华能源环保科技股份有限公司 | Clean combustion device |
| CN104879747B (en) * | 2015-04-17 | 2018-05-01 | 石家庄新华能源环保科技股份有限公司 | A kind of clean combustion equipment |
| CN107997559A (en) * | 2016-11-02 | 2018-05-08 | 广东美的生活电器制造有限公司 | Squeezing cup and food cooking machine |
| CN107997559B (en) * | 2016-11-02 | 2023-04-14 | 广东美的生活电器制造有限公司 | Juice extracting cup and food processor |
| CN113091053A (en) * | 2021-05-12 | 2021-07-09 | 北京工业大学 | Liquid slag-discharging pulverized coal high-temperature air combustion system |
| CN113091053B (en) * | 2021-05-12 | 2024-06-04 | 北京工业大学 | High-temperature air combustion system for liquid slag-discharging pulverized coal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1153018C (en) | 2004-06-09 |
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