CN204986995U - Pulverized coal combustion system - Google Patents
Pulverized coal combustion system Download PDFInfo
- Publication number
- CN204986995U CN204986995U CN201520672452.4U CN201520672452U CN204986995U CN 204986995 U CN204986995 U CN 204986995U CN 201520672452 U CN201520672452 U CN 201520672452U CN 204986995 U CN204986995 U CN 204986995U
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- China
- Prior art keywords
- air
- coal dust
- discharge nozzle
- barrel
- pulverized coal
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Abstract
The utility model discloses a pulverized coal combustion system, including buggy raw material tank, set up in the screw feeder and the blast air charging line of buggy raw material tank's discharge gate lower part, blast air pay -off pipe setup is in screw feeder's lower part and connect screw feeder's bin outlet, the inlet pipe of combustor is connected to the blast air charging line, it has the calcium oxide to hold in the buggy raw material tank to mix, the combustor include feeding blender, central tuber pipe, air inlet casing, stabilizer and some firearm. The beneficial effects of the utility model are that: make the burning of buggy be close or reach ideal state, enable the abundant mixture of buggy and air, make pulverized coal combustion more stable more complete, environmental protection, energy -conservation, high efficiency, simple structure can realize the interior SOx/NOx control of stove, is applicable to boiler equipment such as industrial boiler, industrial stoves and hot -blast furnace.
Description
Technical field
The utility model relates to burner structure technical field, particularly a kind of pulverized coal combustion system.
Background technology
Burner is the core component of combusting coal fines boiler, and the performance of coal powder fired boiler burner directly can affect the thermal efficiency and the environment protection emission of boiler.The use of coal-burning boiler is very extensive, and its combustion system has two kinds, and one is coal cinder layer combustion, and another kind is coal dust suspension combustion, and from Theory of Combustion angle, coal dust suspension combustion is good compared with coal cinder layer combustion.It has sufficient combustion, and burning velocity is fast, flame kernel temperature advantages of higher.According to the policy of the energy-saving and emission-reduction of Theory of Combustion and China, the pulverized coal combustion system designing novel environmental protection and energy saving is necessary.Pulverized coal combustion, development comparatively early be generating plant pulverized coal boiler, its burner has five kinds of forms, single scroll casing type turbulent burner, double volute formula turbulent burner, axial blade-type rotational flow combustor, tangential vane formula turbulent burner and DC burner.Several burner has respective pluses and minuses in actual use above, is difficult to reach desirable fired state and environmental emission standard.
Utility model content
The purpose of this utility model is the shortcoming overcoming prior art, provide one that coal dust and air are mixed fully, allow coal dust firing is more stable more completely, environmental protection, energy-conservation, efficient pulverized coal combustion system.
The purpose of this utility model is achieved through the following technical solutions: pulverized coal combustion system, comprise coal dust material box, be arranged at feeding screw and the air blast charging line of the discharging opening bottom of coal dust material box, air blast charging line is arranged at the bottom of feeding screw and connects the discharge gate of feeding screw, air blast charging line connects the feed pipe of burner, hold in coal dust material box and be mixed with calcium oxide, described burner comprises entry mixers, central air hose, inlet shell, stabilizer and igniter, described entry mixers comprises barrel-type casing, feed pipe and discharge nozzle, barrel-type casing comprises the axial end of cylindrical sidewall and two capping cylindrical sidewall both ends opens, on a discharge nozzle axial end disposed therein, feed pipe is arranged on cylindrical sidewall, and feed pipe and cylindrical sidewall tangent, the deflector of an end face perpendicular to axial direction is provided with in the connecting portion of feed pipe and cylindrical sidewall, deflector one end is positioned at the part that feed pipe connects cylindrical sidewall, the other end of deflector extends to barrel-type casing inside, the inner passage of the feed pipe residing for it and barrel-type casing interior separation are two mutually isolated subchannels by deflector, described deflector is made up of the flat plate section being positioned at feed pipe connected successively and the arc section being positioned at barrel-type casing.Preferably, the axial line of arc section overlaps with the axial line of the cylindrical sidewall be positioned at outside this arc section; The air-flow carrying coal dust and calcium oxide entered by feed pipe flows in two subchannels along barrel-type casing inwall and deflector respectively through deflector shunting, and mixing of confluxing on rear side of deflector, and finally discharge mixing arrangement from discharge nozzle, compare one inlet mixing, swirl strength is large, and mixture homogeneity is high.
Described inlet shell comprises the coal dust conveying pipeline along setting gradually from inside to outside, secondary air channel and primary air piping, inlet shell is also provided with the blast pipe perpendicular to secondary air channel and primary air piping, dividing plate is provided with in blast pipe, blast pipe interior separation becomes to be communicated with the secondary air passage of secondary air channel and the air intake passage being communicated with a blast pipe by dividing plate, the rear end of coal dust conveying pipeline connects the discharge nozzle of entry mixers, the rear end of secondary air channel seals by the sidewall of inlet shell, the rear end of primary air piping is sealed by dividing plate, the front end of a blast pipe has tubaeform air outlet, secondary wind inleting tube is all communicated with tubaeform air outlet with the front end of coal dust conveying pipeline, Secondary Air air-inlet cavity is formed between coal dust conveying pipeline and secondary wind inleting tube, First air air-inlet cavity is formed between secondary wind inleting tube and a blast pipe.
Central air hose to penetrate and from the front end extending to coal dust conveying pipeline after the discharge nozzle of entry mixers passes always from the axial end of of entry mixers, stabilizer is installed on the front end of central air hose, the back-end sealing of central air hose, the sidewall of central air hose rear end is provided with air inlet, igniter penetrates from the rear end of central air hose, and extends to stabilizer inside.
Described stabilizer comprises the conically shaped and cylindrical tube that coaxially arrange successively along direction from front to back, described conically shaped reduces gradually along vertical direction internal diameter, the outer cover of conically shaped front end is provided with annular endplate, the front end of conically shaped is connected with annular endplate by the uniform joint pin of circumference, the barrel of described conically shaped is circumferentially evenly provided with and extends along conically shaped bus and to run through the strip gab of barrel, in said structure, strip gab forms the passage A entering conically shaped inside from conically shaped outside, annular endplate, conically shaped outer wall and joint pin constitute the channel B arriving conically shaped front portion.Such structure makes dense powder, light powder be separated, wherein the effect of light powder radial load is little, inertia is little, spins out in outside, arrives conically shaped anterior by channel B, dense powder is because radial load effect is large, inertia large, and it is inner that the passage A that can be formed by strip gab arrives conically shaped.And the utility model structure is convenient to regulate the length of flame, diameter.
The front end sleeve of central air hose is loaded on the outside of the cylindrical tube of stabilizer, thus between central air hose and stabilizer, form grafting mounting structure, easy disassembly, the front end of igniter is positioned at the connecting portion of cylindrical tube and divergent-cone wall, and the leading section of ignition tip is fixedly connected with cylindrical tube inwall by connecting plate.
Preferably, described central air hose and discharge nozzle are coaxially arranged.
Preferably, the internal diameter of described discharge nozzle along increasing gradually from discharge nozzle to barrel-type casing direction, thus be conducive to improving air-flow flow velocity.
Preferably, the leading section of described discharge nozzle is provided with adpting flange, and the rearward end of coal dust conveying pipeline is provided with adpting flange, and the leading section of discharge nozzle is fixedly connected with by flange and connecting bolt with the rearward end of coal dust conveying pipeline.
Preferably, in described blast pipe, be provided with high-pressure atomization shower nozzle, for spraying denitrfying agent (as ammoniacal liquor, urea water etc.) in burner.
Preferably, the outside being positioned at the coal dust conveying pipeline of a described air intake passage is rotatably installed with mixed organization.
Preferably, described primary air piping radially extends, for being connected the connecting plate of primary air piping and secondary air channel with being circumferentially evenly provided with between secondary air channel.
Preferably, the external diameter of stabilizer is less than the internal diameter of secondary air channel, and the front end face that the front end face of stabilizer and secondary are in charge of all is positioned at the minimum diameter position of tubaeform air outlet.
The utility model has the following advantages:
The utility model originally make the burning of coal dust close to or reach desirable state, coal dust and air can be made to mix fully, make coal dust firing more stable more complete.Regulated by two air quantity and the stablizing of regulable control recirculating zone of swirl strength, the generation of NO reducing agent can be conducive to like this in the rational situation of flue gas oxygen content, and devise catalytic reduction function, the NO that these reducing agents can surround combustion zone oxidation generation makes it be reduced into N
2, thus reduce the discharge of NOx.Data show the reasonable wind distribution by adjusting this burner, and form fractional combustion, the concentration of NOx can be reduced to 200mg/m
3below, discharge standard is met.This burner has spout blockage ratio adjustable function, is applicable to the best combustion of Coal rank, serves key effect to the after-flame degree improving coal dust simultaneously.
Environmental protection, energy-conservation, efficient, structure is simple, can realize in-furnace desulfurization, denitration, be applicable to the boiler plants such as Industrial Boiler, Industrial Stoves and hot-blast stove.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of burner of the present utility model
Fig. 3 is the sectional structure schematic diagram of burner of the present utility model;
Fig. 4 is the sectional view of Fig. 2 along A-A cross section;
Fig. 5 is the sectional view of Fig. 2 along B-B cross section
Fig. 6 is the sectional view of Fig. 2 along C-C cross section
Fig. 7 is the structure chart of stabilizer.
In figure, 1-entry mixers, 2-central air hose, 3-inlet shell, 4-stabilizer, 5-barrel-type casing, 6-feed pipe, 7-discharge nozzle, 8-deflector, 9-coal dust conveying pipeline, 10-secondary air channel, 11-primary air piping, 12-blast pipe, 13-dividing plate, 14-igniter, 15-conically shaped, 16-cylindrical tube, 17-annular endplate, 18-joint pin, 19-strip gab, 20-coal dust material box, 21-feeding screw, 22-air blast charging line.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, pulverized coal combustion system, comprise coal dust material box 20, be arranged at feeding screw 21 and the air blast charging line 22 of the discharging opening bottom of coal dust material box 20, air blast charging line 22 is arranged at the bottom of feeding screw 21 and connects the discharge gate of feeding screw 21, air blast charging line 22 connects the feed pipe 6 of burner, hold in coal dust material box 20 and be mixed with calcium oxide, as shown in Figure 2 and Figure 3, described burner comprises entry mixers 1, central air hose 2, inlet shell 3, stabilizer 4 and igniter 14.As Fig. 2, Fig. 3, shown in Fig. 6, described entry mixers 1 comprises barrel-type casing 5, feed pipe 6 and discharge nozzle 7, barrel-type casing 5 comprises the axial end of cylindrical sidewall and two capping cylindrical sidewall both ends opens, on discharge nozzle 7 axial end disposed therein, feed pipe 6 is arranged on cylindrical sidewall, and feed pipe 6 is tangent with cylindrical sidewall, the deflector 8 of an end face perpendicular to axial direction is provided with in the connecting portion of feed pipe 6 and cylindrical sidewall, deflector 8 one end is positioned at the part that feed pipe 6 connects cylindrical sidewall, the other end of deflector 8 extends to barrel-type casing 5 inside, the inner passage of the feed pipe 6 residing for it and barrel-type casing 5 interior separation are two mutually isolated subchannels by deflector 8, described deflector 8 is made up of the flat plate section being positioned at feed pipe 6 connected successively and the arc section being positioned at barrel-type casing 5.Preferably, the axial line of arc section overlaps with the axial line of the cylindrical sidewall be positioned at outside this arc section; The air-flow carrying coal dust and calcium oxide entered by feed pipe 6 is shunted through deflector 8 and is flowed in two subchannels along barrel-type casing 5 inwall and deflector 8 respectively, and mixing of confluxing on rear side of deflector 8, and finally discharge mixing arrangement from discharge nozzle 7, compare one inlet mixing, swirl strength is large, and mixture homogeneity is high.
As Fig. 3, Fig. 4, shown in Fig. 5, described inlet shell 3 comprises the coal dust conveying pipeline 9 along setting gradually from inside to outside, secondary air channel 10 and primary air piping 11, inlet shell 3 is also provided with the blast pipe 12 perpendicular to secondary air channel 10 and primary air piping 11, dividing plate 13 is provided with in blast pipe 12, blast pipe 12 interior separation becomes to be communicated with the secondary air passage of secondary air channel 10 and the air intake passage being communicated with a blast pipe 12 by dividing plate 13, the rear end of coal dust conveying pipeline 9 connects the discharge nozzle 7 of entry mixers 1, the rear end of secondary air channel 10 seals by the sidewall of inlet shell 3, the rear end of primary air piping 11 is sealed by dividing plate 13, the front end of a blast pipe 12 has tubaeform air outlet, secondary wind inleting tube 12 is all communicated with tubaeform air outlet with the front end of coal dust conveying pipeline 9, Secondary Air air-inlet cavity is formed between coal dust conveying pipeline 9 and secondary wind inleting tube 12, First air air-inlet cavity is formed between secondary wind inleting tube 12 and a blast pipe 12.
As shown in Figure 2 and Figure 3, central air hose 2 penetrates from the axial end of of entry mixers 1 and extends to the front end of coal dust conveying pipeline 9 after passing from the discharge nozzle 7 of entry mixers 1 always, stabilizer 4 is installed on the front end of central air hose 2, the back-end sealing of central air hose 2, the sidewall of central air hose 2 rear end is provided with air inlet, igniter 14 penetrates from the rear end of central air hose 2, and it is inner to extend to stabilizer 4.
As Fig. 3, shown in Fig. 7, described stabilizer 4 comprises the conically shaped 15 and cylindrical tube 16 that coaxially arrange successively along direction from front to back, described conically shaped 15 reduces gradually along vertical direction internal diameter, the outer cover of conically shaped 15 front end is provided with annular endplate 17, the front end of conically shaped 15 is connected with annular endplate 17 by the uniform joint pin 18 of circumference, the barrel of described conically shaped 15 is circumferentially evenly provided with and extends along conically shaped 15 bus and to run through the strip gab 19 of barrel, in said structure, strip gab 19 forms the passage A entering conically shaped 15 inside from conically shaped 15 outside, annular endplate 17, conically shaped 15 outer wall and joint pin 18 constitute the channel B arriving conically shaped 15 front portion.Such structure makes dense powder, light powder be separated, wherein the effect of light powder radial load is little, inertia is little, spins out in outside, arrives conically shaped 15 anterior by channel B, dense powder is because radial load effect is large, inertia large, and it is inner that the passage A that can be formed by strip gab 19 arrives conically shaped 15.And the utility model structure is convenient to regulate the length of flame, diameter.
The front end sleeve of central air hose 2 is loaded on the outside of the cylindrical tube 16 of stabilizer 4, thus between central air hose and stabilizer, form grafting mounting structure, easy disassembly, the front end of igniter 14 is positioned at the connecting portion of cylindrical tube 16 body and conical tube 15 body, and the leading section of ignition tip is fixedly connected with cylindrical tube 16 inwall by connecting plate.
Preferably, described central air hose 2 is coaxially arranged with discharge nozzle 7.
Preferably, the internal diameter of described discharge nozzle 7 along increasing gradually from discharge nozzle 7 to barrel-type casing 5 direction, thus be conducive to improving air-flow flow velocity.
Preferably, the leading section of described discharge nozzle 7 is provided with adpting flange, and the rearward end of coal dust conveying pipeline 9 is provided with adpting flange, and the leading section of discharge nozzle 7 is fixedly connected with by flange and connecting bolt with the rearward end of coal dust conveying pipeline 9.
Preferably, high-pressure atomization shower nozzle is provided with in described blast pipe 12, for spraying denitrfying agent in burner, as ammoniacal liquor, urea water etc.
Preferably, the outside being positioned at the coal dust conveying pipeline 9 of a described air intake passage is rotatably installed with mixed organization.
Preferably, described primary air piping 11 radially extends, for being connected the connecting plate of primary air piping 11 and secondary air channel 10 with being circumferentially evenly provided with between secondary air channel 10.
Preferably, the external diameter of stabilizer 4 is less than the internal diameter of secondary air channel 10, and the front end face that the front end face of stabilizer 4 and secondary are in charge of all is positioned at the minimum diameter position of tubaeform air outlet.
Claims (8)
1. pulverized coal combustion system, it is characterized in that: comprise coal dust material box (20), be arranged at feeding screw (21) and the air blast charging line (22) of the discharging opening bottom of coal dust material box (20), air blast charging line (22) is arranged at the bottom of feeding screw (21) and connects the discharge gate of feeding screw (21), air blast charging line (22) connects the feed pipe (6) of burner, hold in coal dust material box (20) and be mixed with calcium oxide, described burner comprises entry mixers (1), central air hose (2), inlet shell (3), stabilizer (4) and igniter (14),
Described entry mixers (1) comprises barrel-type casing (5), feed pipe (6) and discharge nozzle (7), barrel-type casing (5) comprises the axial end of cylindrical sidewall and two capping cylindrical sidewall both ends opens, on discharge nozzle (7) axial end disposed therein, feed pipe (6) is arranged on cylindrical sidewall, and feed pipe (6) is tangent with cylindrical sidewall, the deflector (8) of an end face perpendicular to axial direction is provided with in the connecting portion of feed pipe (6) and cylindrical sidewall, deflector (8) one end is positioned at the part that feed pipe (6) connects cylindrical sidewall, the other end of deflector (8) extends to barrel-type casing (5) inside, the inner passage of the feed pipe (6) residing for it and barrel-type casing (5) interior separation are two mutually isolated subchannels by deflector (8), described deflector (8) is made up of the flat plate section being positioned at feed pipe (6) connected successively and the arc section being positioned at barrel-type casing (5),
Inlet shell (3) comprises the coal dust conveying pipeline (9) along setting gradually from inside to outside, secondary air channel (10) and primary air piping (11), inlet shell (3) is also provided with the blast pipe (12) perpendicular to secondary air channel (10) and primary air piping (11), dividing plate (13) is provided with in blast pipe (12), blast pipe (12) interior separation becomes to be communicated with the secondary air passage of secondary air channel (10) and the air intake passage being communicated with a blast pipe (12) by dividing plate (13), the rear end of coal dust conveying pipeline (9) connects the discharge nozzle (7) of entry mixers (1), the rear end of secondary air channel (10) seals by the sidewall of inlet shell (3), the rear end of primary air piping (11) is sealed by dividing plate (13), the front end of a blast pipe (12) has tubaeform air outlet, secondary wind inleting tube (12) is all communicated with tubaeform air outlet with the front end of coal dust conveying pipeline (9), Secondary Air air-inlet cavity is formed between coal dust conveying pipeline (9) and secondary wind inleting tube (12), First air air-inlet cavity is formed between secondary wind inleting tube (12) and a blast pipe (12),
Central air hose (2) penetrates from the axial end of of entry mixers (1) and extends to the front end of coal dust conveying pipeline (9) after passing from the discharge nozzle (7) of entry mixers (1), stabilizer (4) is installed on the front end of central air hose (2), the back-end sealing of central air hose (2), the sidewall of central air hose (2) rear end is provided with air inlet, igniter (14) penetrates from the rear end of central air hose (2), and it is inner to extend to stabilizer (4);
Described stabilizer (4) comprises the conically shaped (15) and cylindrical tube (16) that coaxially arrange successively along direction from front to back, described conically shaped (15) reduces gradually along vertical direction internal diameter, the outer cover of conically shaped (15) front end is provided with annular endplate (17), the front end of conically shaped (15) is connected with annular endplate (17) by the uniform joint pin (18) of circumference, the barrel of described conically shaped (15) is circumferentially evenly provided with and extends along conically shaped (15) bus and to run through the strip gab (19) of barrel,
The front end sleeve of central air hose (2) is loaded on the outside of the cylindrical tube (16) of stabilizer (4), the front end of igniter (14) is positioned at the connecting portion of cylindrical tube (16) body and conical tube (15) body, and the leading section of ignition tip is fixedly connected with cylindrical tube (16) inwall by connecting plate.
2. pulverized coal combustion system according to claim 1, is characterized in that: the axial line of described arc section overlaps with the axial line of the cylindrical sidewall be positioned at outside this arc section.
3. pulverized coal combustion system according to claim 1, is characterized in that: described central air hose (2) and discharge nozzle (7) are coaxially arranged.
4. pulverized coal combustion system according to claim 1, is characterized in that: the internal diameter of described discharge nozzle (7) is along increasing gradually from discharge nozzle (7) to barrel-type casing (5) direction.
5. pulverized coal combustion system according to claim 1, it is characterized in that: the leading section of described discharge nozzle (7) is provided with adpting flange, the rearward end of coal dust conveying pipeline (9) is provided with adpting flange, and the leading section of discharge nozzle (7) is fixedly connected with by flange and connecting bolt with the rearward end of coal dust conveying pipeline (9).
6. pulverized coal combustion system according to claim 1, is characterized in that: be provided with high-pressure atomization shower nozzle in described blast pipe (12).
7. pulverized coal combustion system according to claim 1, is characterized in that: the described outside being positioned at the coal dust conveying pipeline (9) of a described air intake passage is rotatably installed with mixed organization.
8. pulverized coal combustion system according to claim 1, is characterized in that: described primary air piping (11) radially extends, for being connected the connecting plate of primary air piping (11) and secondary air channel (10) with being circumferentially evenly provided with between secondary air channel (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520672452.4U CN204986995U (en) | 2015-09-01 | 2015-09-01 | Pulverized coal combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520672452.4U CN204986995U (en) | 2015-09-01 | 2015-09-01 | Pulverized coal combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204986995U true CN204986995U (en) | 2016-01-20 |
Family
ID=55121362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520672452.4U Withdrawn - After Issue CN204986995U (en) | 2015-09-01 | 2015-09-01 | Pulverized coal combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204986995U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135427A (en) * | 2015-09-01 | 2015-12-09 | 山东华臻重工有限公司 | Coal powder combustion system |
-
2015
- 2015-09-01 CN CN201520672452.4U patent/CN204986995U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135427A (en) * | 2015-09-01 | 2015-12-09 | 山东华臻重工有限公司 | Coal powder combustion system |
| CN105135427B (en) * | 2015-09-01 | 2017-07-11 | 山东富海泰来新能源科技有限公司 | Pulverized coal combustion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160120 Effective date of abandoning: 20170711 |
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| AV01 | Patent right actively abandoned |