CN201852089U - External-burning tiny-oil ignition water-cooling low-NOx pulverized-coal burner - Google Patents
External-burning tiny-oil ignition water-cooling low-NOx pulverized-coal burner Download PDFInfo
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- CN201852089U CN201852089U CN2010205983088U CN201020598308U CN201852089U CN 201852089 U CN201852089 U CN 201852089U CN 2010205983088 U CN2010205983088 U CN 2010205983088U CN 201020598308 U CN201020598308 U CN 201020598308U CN 201852089 U CN201852089 U CN 201852089U
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- gradually expanded
- expanded form
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- form burner
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Abstract
The utility model discloses an external-burning tiny-oil ignition water-cooling low-NOx pulverized-coal burner. The shell of a gradually-expanded burner body is sleeved outside the gradually-expanded burner body to be hermetically connected, the small end of the body is connected with a primary wind pipe, a blunt body is arranged inside the body, baffle plates are symmetrically installed at both outer sides of a large end, a plurality of triangular slots are respectively arranged on the upper surface and the lower surface at the large end of the blunt body, a tiny oil-gun sleeve pipe and a high-energy firing-gun sleeve pipe are arranged in the blunt body, the small end of the blunt body is connected with a central sleeve pipe, an upper pulverized-coal airflow passage and a lower pulverized-coal airflow passage are formed between the central sleeve pipe and the primary wind pipe, a cooling-water inlet pipe and a cooling-water outlet pipe are arranged on both edges at the outer side of a sealing plate, a blunt-body cooling-water inlet pipe and a blunt-body cooling-water outlet pipe are respectively arranged in parallel at the small end of the blunt body, and one ends of a tiny oil gun and a high-energy firing gun arranged in the central sleeve pipe respectively penetrate through the tiny oil-gun sleeve pipe and the high-energy firing-gun sleeve pipe. The ignition point of the burner is always near a burner outlet and is favorable to strengthening the initial firing and burnout of pulverized coal, the oxygen at a burner region is effectively consumed, and the generation of NOx is inhabited at high temperature and low oxygen.
Description
Technical field
The utility model relates to a kind of coal burner, particularly relates to a kind of external-burning tiny-oil ignition water-cooled low-NOx pulverized coal burner.
Background technology
Since the complexity of coal dust firing, different coals, different load and different running method, all inequality to the requirement of burner, embody a concentrated reflection of and both need to strengthen catching fire of coal dust, guarantee after-flame, prevent effectively that again burner from burning out, also will possess cold conditions igniting fuel-economizing and low NOx combustion function.In the pulverized coal boiler ignition field, occur much such as coal burners such as little oil, plasmas, its common ground is to utilize localized hyperthermia's incendiary source, at burner internal classification firing coal-dust airflow, reaches igniting fuel-economizing purpose.Because high temperature dot is positioned at burner inside, increased the burner resistance on the one hand, cause the slagging scorification scaling loss on the other hand easily.This type of burner and main burner exist on structure function than big-difference, do not possess underload ability, coal adaptability and low NOx function under the condition of the auxiliary igniting source that do not come into operation.Regulate the burner ignition point position though can pass through means such as center wind, surrounding air, owing to coming into operation of center wind, surrounding air etc., replenished the oxygen amount of burner region, NOx can generate in a large number.
Summary of the invention
In order to solve the problem that exists in the background technology, the purpose of this utility model is to provide a kind of external-burning tiny-oil ignition water-cooled low-NOx pulverized coal burner, and its high temperature dot that catches fire is positioned at burner outlet.
The technical scheme that its technical problem that solves the utility model adopts is:
The utility model comprises airduct, center sleeve, little oil gun, high-energy firing gun, bluff body cooling water inlet pipe, bluff body cooling water outlet pipe, gradually expanded form burner body cooling water inlet pipe, gradually expanded form burner body cooling water outlet pipe, gradually expanded form burner body sealing plate, gradually expanded form burner body shell, bluff body, gradually expanded form burner body and dividing plate one time; Gradually expanded form burner body shell is enclosed within gradually expanded form burner body outside, the one end is connected with the large port of gradually expanded form burner body, its other end is connected with gradually expanded form burner body sealing plate with the portlet of gradually expanded form burner body, the small end of gradually expanded form burner body links to each other with an airduct, gradually expanded form burner body internal placement bluff body, big end two outside symmetries of bluff body are equipped with dividing plate, the big end of bluff body top and bottom are respectively equipped with a plurality of vee gutters, a plurality of vee gutters extend to the bluff body small end, the bluff body inner hollow, and be provided with little oil gun sleeve pipe and high-energy firing gun sleeve pipe, the bluff body small end links to each other with center sleeve, form two breeze airflow passages up and down between center sleeve and an airduct, gradually expanded form burner body cooling water inlet pipe and gradually expanded form burner body cooling water outlet pipe be arranged in parallel on both sides, the gradually expanded form burner body sealing plate outside, at bluff body small end respectively be arranged in parallel bluff body cooling water inlet pipe and bluff body cooling water outlet pipe, little oil gun and high-energy firing gun are set in center sleeve, one end of little oil gun and high-energy firing gun penetrates little oil gun sleeve pipe and high-energy firing gun sleeve pipe respectively, the end face of little oil gun and high-energy firing gun respectively with the big end of bluff body on same plane.
The axial length C of the port of export enlarging of described gradually expanded form burner body is 80～120mm.
Described dividing plate entrance face and the big end of bluff body at grade, the exit end face of the exit end face of dividing plate and gradually expanded form burner body is 130～170mm apart from B.
The exit end face distance A of described bluff body large end face and gradually expanded form burner body is 230～270mm.
The useful effect that the utlity model has is:
The utility model utilizes bluff body to realize concentrating of breeze airflow, breeze airflow after concentrating obtains further concentrating through the vee gutter on the bluff body time, dividing plate is isolated breeze airflow after concentrating and coal dust main flow, near two dividing plates, form recirculating zone with high concentration pulverized coal, realize ultra-low load steady combustion and wide coal adaptability, under cold wind black furnace condition, available little oil gun firing coal-dust airflow, realize increasing temperature and pressure, respectively gradually expanded form burner body and bluff body are carried out water quench, guarantee that burner is not burnt out, make coal powder ignition point all the time near burner outlet, strengthening the coal dust initial stage catches fire, and helps the after-flame of coal dust on the one hand, consumed burner region oxygen on the other hand, realized that high-temperature low-oxygen suppresses the generation of NOx.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present utility model.
Fig. 2 is the A-A cutaway view of Fig. 1.
Among the figure: 1, airduct, 2, center sleeve, 3, little oil gun, 4, high-energy firing gun, 5, the bluff body cooling water inlet pipe, 6, the bluff body cooling water outlet pipe, 7, gradually expanded form burner body cooling water inlet pipe, 8, gradually expanded form burner body cooling water outlet pipe, 9, gradually expanded form burner body sealing plate, 10, gradually expanded form burner body shell, 11, bluff body, 12, the gradually expanded form burner body, 13, dividing plate, 14, vee gutter, 15, little oil gun sleeve pipe, 16, the high-energy firing gun sleeve pipe.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, the utility model comprises airduct 1, center sleeve 2, little oil gun 3, high-energy firing gun 4, bluff body cooling water inlet pipe 5, bluff body cooling water outlet pipe 6, gradually expanded form burner body cooling water inlet pipe 7, gradually expanded form burner body cooling water outlet pipe 8, gradually expanded form burner body sealing plate 9, gradually expanded form burner body shell 10, bluff body 11, gradually expanded form burner body 12 and dividing plate 13 one time; Gradually expanded form burner body shell 10 is enclosed within gradually expanded form burner body 12 outsides, the one end is connected with the large port of gradually expanded form burner body 12, its other end is connected with gradually expanded form burner body sealing plate 9 with the portlet of gradually expanded form burner body 12, the small end of gradually expanded form burner body 12 links to each other with an airduct 1, gradually expanded form burner body 12 internal placement bluff bodies 11, bluff body 11 big end two outside symmetries are equipped with dividing plate 13, bluff body 11 big end top and bottom are respectively equipped with a plurality of vee gutters 14, a plurality of vee gutters 14 extend to bluff body 11 small ends, bluff body 11 inner hollow, and be provided with little oil gun sleeve pipe 15 and high-energy firing gun sleeve pipe 16, bluff body 11 small ends link to each other with center sleeve 2, form two breeze airflow passages up and down between center sleeve 2 and an airduct 1, gradually expanded form burner body cooling water inlet pipe 7 and gradually expanded form burner body cooling water outlet pipe 8 be arranged in parallel on both sides, gradually expanded form burner body sealing plate 9 outside, at bluff body 11 small ends respectively be arranged in parallel bluff body cooling water inlet pipe 5 and bluff body cooling water outlet pipe 6, little oil gun 3 and high-energy firing gun 4 are set in center sleeve 2, one end of little oil gun 3 and high-energy firing gun 4 penetrates little oil gun sleeve pipe 15 and high-energy firing gun sleeve pipe 16 respectively, the end face of little oil gun 3 and high-energy firing gun 4 respectively with the big end of bluff body 11 on same plane.
The axial length C of the port of export enlarging of described gradually expanded form burner body 12 is 80～120mm.
Described dividing plate 13 entrance faces and bluff body 11 big ends at grade, the exit end face of the exit end face of dividing plate 13 and gradually expanded form burner body 12 is 130～170mm apart from B.
The exit end face distance A of described bluff body 11 large end faces and gradually expanded form burner body 12 is 230～270mm.
The course of work of the present utility model is as follows:
Because the acting in conjunction of bluff body 11 and two dividing plates 13 forms roomy recirculating zone between bluff body 11 and two dividing plates 13, have good ignition condition.The breeze airflow airduct 1 of flowing through arrives bluff body 11, concentrated in bluff body 11 upper and lower surfaces, a part of coal dust air-flow after concentrating obtains further localized concentrations through the vee gutter 14 on the bluff body 11 time, and enter in the recirculating zone between bluff body 11 and two dividing plates 13, bluff body 11 big end both sides sectional areas are less than the centre, make that bluff body 11 recirculating zones are partially enclosed, at this moment, utilize high-energy firing gun 4 to light the diesel oil of little oil gun 3 ejections, just can under cold wind black furnace condition, light high concentration pulverized coal air-flow in the recirculating zone, reflux area length is apart from bluff body 11 big end 400～500mm generally speaking, the high concentration pulverized coal rear section that catches fire is between two dividing plates 13 in the recirculating zone, and the heat emission is less, can reach very high-temperature, and dividing plate 13 is cooled off by the coal dust main flow, can scaling loss.The water conservation and bluff body 11 and gradually expanded form burner body 12 are cooled can scaling loss yet.Along with the carrying out of increasing temperature and pressure, the control cooling water temperature can guarantee the normal safe operation of burner.Because ignition point is all the time near burner outlet under different coals, different load condition, help coal dust on the one hand and strengthen the coal dust initial stage and the after-flame of fighting, effectively consume burner region oxygen on the other hand, realize that high-temperature low-oxygen suppresses the generation of NOx.Be particularly suitable for fractional combustion and suppress the boiler that NOx generates.
The above-mentioned specific embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (4)
1. an external-burning tiny-oil ignition water-cooled low-NOx pulverized coal burner is characterized in that: comprise an airduct (1), center sleeve (2), little oil gun (3), high-energy firing gun (4), bluff body cooling water inlet pipe (5), bluff body cooling water outlet pipe (6), gradually expanded form burner body cooling water inlet pipe (7), gradually expanded form burner body cooling water outlet pipe (8), gradually expanded form burner body sealing plate (9), gradually expanded form burner body shell (10), bluff body (11), gradually expanded form burner body (12) and dividing plate (13); Gradually expanded form burner body shell (10) is enclosed within gradually expanded form burner body (12) outside, the one end is connected with the large port of gradually expanded form burner body (12), its other end is connected with gradually expanded form burner body sealing plate (9) with the portlet of gradually expanded form burner body (12), the small end of gradually expanded form burner body (12) links to each other with an airduct (1), gradually expanded form burner body (12) internal placement bluff body (11), bluff body (11) holds two outside symmetries that dividing plate (13) is housed greatly, bluff body (11) holds top and bottom to be respectively equipped with a plurality of vee gutters (14) greatly, a plurality of vee gutters (14) extend to bluff body (11) small end, bluff body (11) inner hollow, and be provided with little oil gun sleeve pipe (15) and high-energy firing gun sleeve pipe (16), bluff body (11) small end links to each other with center sleeve (2), form two breeze airflow passages up and down between a center sleeve (2) and the airduct (1), gradually expanded form burner body cooling water inlet pipe (7) and gradually expanded form burner body cooling water outlet pipe (8) be arranged in parallel on both sides, gradually expanded form burner body sealing plate (9) outside, at bluff body (11) small end respectively be arranged in parallel bluff body cooling water inlet pipe (5) and bluff body cooling water outlet pipe (6), little oil gun (3) and high-energy firing gun (4) are set in center sleeve (2), one end of little oil gun (3) and high-energy firing gun (4) penetrates little oil gun sleeve pipe (15) and high-energy firing gun sleeve pipe (16) respectively, the end face of little oil gun (3) and high-energy firing gun (4) respectively with the big end of bluff body (11) on same plane.
2. a kind of external-burning tiny-oil ignition water-cooled low-NOx pulverized coal burner according to claim 1, it is characterized in that: the axial length C of the port of export enlarging of described gradually expanded form burner body (12) is 80～120mm.
3. a kind of external-burning tiny-oil ignition water-cooled low-NOx pulverized coal burner according to claim 1, it is characterized in that: described dividing plate (13) entrance face and bluff body (11) are big to be held at grade, and the exit end face of the exit end face of dividing plate (13) and gradually expanded form burner body (12) is 130～170mm apart from B.
4. a kind of external-burning tiny-oil ignition water-cooled low-NOx pulverized coal burner according to claim 1, it is characterized in that: the exit end face distance A of described bluff body (11) large end face and gradually expanded form burner body (12) is 230～270mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205983088U CN201852089U (en) | 2010-11-09 | 2010-11-09 | External-burning tiny-oil ignition water-cooling low-NOx pulverized-coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205983088U CN201852089U (en) | 2010-11-09 | 2010-11-09 | External-burning tiny-oil ignition water-cooling low-NOx pulverized-coal burner |
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| Publication Number | Publication Date |
|---|---|
| CN201852089U true CN201852089U (en) | 2011-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205983088U Expired - Fee Related CN201852089U (en) | 2010-11-09 | 2010-11-09 | External-burning tiny-oil ignition water-cooling low-NOx pulverized-coal burner |
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| CN (1) | CN201852089U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022725A (en) * | 2010-11-09 | 2011-04-20 | 浙江大学 | Water-cooling pulverized coal burner with low NOx of external combustion type micro-oil ignition |
| CN111023081A (en) * | 2019-12-19 | 2020-04-17 | 哈尔滨工业大学 | W-flame boiler using gap type burner |
-
2010
- 2010-11-09 CN CN2010205983088U patent/CN201852089U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022725A (en) * | 2010-11-09 | 2011-04-20 | 浙江大学 | Water-cooling pulverized coal burner with low NOx of external combustion type micro-oil ignition |
| CN111023081A (en) * | 2019-12-19 | 2020-04-17 | 哈尔滨工业大学 | W-flame boiler using gap type burner |
| CN111023081B (en) * | 2019-12-19 | 2020-10-27 | 哈尔滨工业大学 | W-flame boiler using gap type burner |
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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: 20110601 Termination date: 20121109 |