CN115264500A - Double-cyclone burner for cement clinker production - Google Patents
Double-cyclone burner for cement clinker production Download PDFInfo
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- CN115264500A CN115264500A CN202210899446.7A CN202210899446A CN115264500A CN 115264500 A CN115264500 A CN 115264500A CN 202210899446 A CN202210899446 A CN 202210899446A CN 115264500 A CN115264500 A CN 115264500A
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- cyclone
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- coal
- swirler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
- F23D17/007—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel liquid or pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a double-cyclone burner for cement clinker production, which comprises a main pipeline, wherein a fuel pipe is arranged inside the main pipeline, an axial flow air channel is arranged at one end, close to the front surface, of the main pipeline, an outer cyclone air channel is arranged at the outer side, close to the middle part, of the main pipeline, a pulverized coal air channel is arranged at the top surface, close to the middle part, of the main pipeline, an outer cyclone air channel is arranged between the outer cyclone air channel and the main pipeline, an adjusting device is arranged at one end of the main pipeline, and the inner cyclone air channel comprises an inner cyclone at the head part and an inner cyclone connecting piece; the double-cyclone combustor for cement clinker production adopts a double-cyclone technology, airflow rotates while drives pulverized coal to diffuse and advance, the pulverized coal and air are mixed to a higher degree and are easier to burn, and the double-cyclone combustor has the advantages of lower primary air ratio, stronger coal adaptability, more regular flame shape, longer service life, more stable heat concentration and lower NOx emission.
Description
Technical Field
The invention relates to the field of combustors, in particular to a double-cyclone combustor for cement clinker production.
Background
Coal plays an important role in energy structures in China, pulverized coal combustion is widely applied to various industries, and a combustor which is more economical, more environment-friendly and longer in service life is required in the cement industry.
The swirl burner used in the cement burning process in China at present mainly adopts single-layer swirl, the space of a combustion chamber is difficult to be effectively utilized, the pulverized coal directly enters the combustion chamber, the flow field in the combustion chamber is distorted, the mixing of the pulverized coal and air is not facilitated, the combustion efficiency is influenced, and the results of unstable combustion, low combustion efficiency, irregular flame shape, high NOx emission and the like are caused.
Disclosure of Invention
The invention mainly aims to provide a double-cyclone burner for cement clinker production, which can effectively solve the technical problems in the background technology.
In order to realize the purpose, the invention adopts the technical scheme that:
the utility model provides a two cyclone burner for cement clinker production, includes the main line, the internally mounted of main line has the fuel pipe, the front of main line is close to one end and installs the axial flow wind channel, the outside of main line is close to the centre and installs outer whirl wind channel, the top surface of main line is close to the centre and installs the buggy wind channel, install outer whirl wind channel between outer whirl wind channel and the main line, adjusting device is installed to the one end of main line, interior whirl wind channel includes swirler and interior swirler connecting piece in the head, the buggy wind channel includes head buggy export and middle part buggy export, outer whirl wind channel includes outer swirler of head and outer swirler connecting piece, the axial flow wind channel includes head sprayer and sprayer connecting piece, the big urceolus in head and the big urceolus in middle part are installed in the outside of main line.
As a further scheme of the invention, the main pipeline is provided with four primary air inlets which are respectively a pulverized coal air duct opening, an axial flow air duct opening, an inner rotational flow air duct opening and an outer rotational flow air duct opening, and the four primary air inlets are connected by a sleeve and are staggered in the axial direction.
As a further scheme of the invention, swirl inclined hole plates are respectively arranged in the head part inner swirler and the head part outer swirler, inner swirl air is sprayed out along the tangential direction of the inclined holes, the head part inner swirler and the inner swirl air duct are movably arranged, and the tangential angle change range of the spray opening is 40-50 degrees.
As a further scheme of the invention, the angle between the pulverized coal air duct and the main pipeline is 15 degrees, and the head inner swirler and inner swirler connecting piece, the head pulverized coal outlet and middle pulverized coal outlet, the head outer swirler and outer swirler connecting piece and the head ejector and ejector connecting piece are in threaded connection.
As a further scheme of the invention, the large head outer cylinder and the large middle outer cylinder are connected with the main pipeline through bolts, the fuel oil pipe, the inner rotational flow air duct, the pulverized coal air duct, the outer rotational flow air duct and the axial flow air duct are communicated, and the fuel oil pipe, the inner rotational flow air duct, the pulverized coal air duct, the outer rotational flow air duct and the axial flow air duct are in threaded connection with the main pipeline.
As a further scheme of the invention, the double-cyclone burner for producing the cement clinker comprises the following specific use steps:
the method comprises the following steps: coal powder enters a pipeline through a coal powder air channel, a coal powder inlet is subjected to wear-resisting treatment, meanwhile, the angle between the coal powder air channel inlet and a main pipeline is 15 degrees through calculation simulation, the abrasion generated when the coal powder enters a burner body is reduced, the service life of the device is prolonged, the coal powder is sprayed out from a head coal powder outlet of the burner, axial air is formed by a head injector after primary air enters an axial flow air channel and is mixed with the coal powder sprayed out from the head coal powder outlet, the coal powder is driven to move axially, meanwhile, secondary air in a combustion chamber is involved into a combustion head to continue to participate in combustion because the axial air speed is overlarge, the axial flow air speed is larger than 300m/s, outer rotational air is 160-180m/s, coal air and inner rotational air are 140-160m/s through optimized design and reasonable air volume matching, the air speed of the axial flow air is large, the pressure difference of the combustion chamber is also large, the capability of the burner for entraining the secondary air is stronger, the occupation ratio of the primary air is reduced to 6-7%, and the cost is saved and the environment is protected;
step two: in addition, primary air enters the cyclone air duct opening and then respectively enters the inner cyclone air duct and the outer cyclone air duct, a valve is arranged at the position of the inner and outer cyclone air duct openings, the air volume of the inner and outer cyclone air ducts can be controlled, the primary air of the inner cyclone air duct passes through the inner cyclone at the head part, a cyclone inclined hole plate with a variable cyclone angle is arranged on the inner cyclone at the head part, rotary flow air is formed under the action of the valve, entrainment is formed with coal powder entering at a constant speed, the coal powder is fully dispersed in the combustion chamber and fully mixed with the combustion chamber to rotate forwards, meanwhile, the primary air entering the outer cyclone air duct passes through the outer cyclone at the head part, the cyclone inclined hole plate with a certain cyclone angle is arranged on the outer cyclone at the head part, airflow rotating forwards is formed under the action of the cyclone inclined hole plate, the rotating direction is the same as that of the inner cyclone air, the rotation trend of the coal powder and the inner cyclone airflow is strengthened and mixed with the combustion supporting combustion air, the flame of the combustor is relatively regular, the thick and adjustable in shape, the coal powder can be fully combusted, and has stronger coal quality adaptability, the utilization rate of fuel gas is improved, the combination of more stable concentration, the generation of oxygen shortage combustion and the generation of NOx emission can be effectively inhibited.
Compared with the prior art, the invention has the following beneficial effects: the invention adopts the double-rotational-flow technology, the airflow rotates and drives the pulverized coal to diffuse and advance at the same time, the degree of mixing of the pulverized coal and air is higher, and the combustion is easier; the double-cyclone burner has the advantages of lower primary air ratio, stronger coal adaptability, more regular flame shape, longer service life, more stable heat concentration and lower NOx emission.
Drawings
FIG. 1 is a schematic view of the overall structure of a dual cyclone burner for cement clinker production according to the present invention;
FIG. 2 is a schematic view of adjusting the swirl angle of the internal swirler of the head of the double-swirl burner for cement clinker production according to the present invention;
FIG. 3 is an expanded view of the swirler inclined holes in the head of the dual cyclone burner for cement clinker production according to the present invention;
FIG. 4 is a schematic view of the air duct of a dual cyclone burner for cement clinker production according to the present invention;
FIG. 5 is a schematic diagram illustrating the structure of a pulverized coal inlet of a dual cyclone burner for cement clinker production according to the present invention.
In the figure: 1. a large outer barrel at the head; 2. a head sprayer; 3. an outer head swirler; 4. a head coal dust outlet; 5. an in-head swirler; 6. an inner swirler connection; 7. a middle coal powder outlet; 8. an outer swirler connection; 9. an injector connection; 10. a middle large outer cylinder; 11. a fuel pipe.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-5, a double-cyclone burner for cement clinker production, which comprises a main pipeline, wherein a fuel pipe 11 is arranged inside the main pipeline, an axial flow air channel is arranged near one end of the front surface of the main pipeline, an outer cyclone air channel is arranged near the middle of the outer side of the main pipeline, a pulverized coal air channel is arranged near the middle of the top surface of the main pipeline, an outer cyclone air channel is arranged between the outer cyclone air channel and the main pipeline, an adjusting device is arranged at one end of the main pipeline, the inner cyclone air channel comprises a head inner cyclone 5 and an inner cyclone connecting piece 6, the pulverized coal air channel comprises a head pulverized coal outlet 4 and a middle pulverized coal outlet 7, the outer cyclone air channel comprises a head outer cyclone 3 and an outer cyclone connecting piece 8, the axial flow air channel comprises a head injector 2 and an injector connecting piece 9, and a head large outer cylinder 1 and a middle large outer cylinder 10 are arranged outside the main pipeline.
In this embodiment, for the convenience of adjusting the combustor internal pressure, four primary air inlets are set up to the main pipeline, and be buggy wind channel mouth, axial compressor wind channel mouth, interior whirl wind channel mouth and outer whirl wind channel mouth respectively, stagger along axial direction by muffjoint between four primary air inlets simultaneously.
In this embodiment, in order to change the direction of the wind flow, the swirl inclined hole plates are installed in both the head inner swirler 5 and the head outer swirler 3, the inner swirl wind is ejected along the tangential direction of the inclined hole, the head inner swirler 5 and the inner swirl wind channel are movably arranged, and the tangential angle change range at the nozzle is 40-50 °.
In this embodiment, in order to reduce the wear of pulverized coal when entering the burner body and improve the service life of the device, the angle between the pulverized coal air duct and the main pipeline is 15 °, and the head inner swirler 5 and the inner swirler connecting piece 6, the head pulverized coal outlet 4 and the middle pulverized coal outlet 7, the head outer swirler 3 and the outer swirler connecting piece 8 are all in threaded connection with the head injector 2 and the injector connecting piece 9.
In this embodiment, in order to ensure the stability of the burner, the large head outer barrel 1 and the large middle outer barrel 10 are connected to the main pipeline by bolts, the fuel pipes 11, the inner swirling air ducts, the pulverized coal air ducts, the outer swirling air ducts and the axial flow air ducts are connected to each other by a through manner, and the fuel pipes 11, the inner swirling air ducts, the pulverized coal air ducts, the outer swirling air ducts and the axial flow air ducts are connected to the main pipeline by threads.
It should be noted that the invention is a double-cyclone burner for cement clinker production, when in use, firstly, the coal powder enters the pipeline through the coal powder air duct, the coal powder inlet is subjected to wear-resisting treatment, meanwhile, the angle between the coal powder air duct inlet and the main pipeline is 15 degrees through calculation and simulation, the abrasion generated when the coal powder enters the burner body is reduced, the service life of the equipment is prolonged, the coal powder is sprayed out from the head coal powder outlet 4 of the burner, the primary air enters the axial flow air duct and forms axial wind through the head injector 2, the axial wind is mixed with the coal powder sprayed out from the head coal powder outlet 4, the coal powder is driven to move axially, meanwhile, because the axial wind speed is overlarge, the secondary wind in the combustion chamber is involved into the combustion head to continuously participate in the combustion, through the reasonable matching of the optimized design and the wind quantity, the axial wind speed is larger than 300m/s, the external cyclone is 160-180m/s, the coal wind and the internal cyclone is 140-160m/s, because the wind speed of the axial flow wind is large, the pressure difference of the combustion chamber is also increased, the stronger the ability of the combustor to absorb the secondary wind is, the percentage of the primary wind is reduced to 6-7%, the more cost is saved and the environment is protected, the other primary wind enters the rotational flow wind channel opening and then respectively enters the inner rotational flow wind channel and the outer rotational flow wind channel, the inner rotational flow wind channel opening and the outer rotational flow wind channel opening are provided with valves which can control the wind quantity of the inner rotational flow wind, the primary wind of the inner rotational flow wind channel passes through the inner swirler 5 at the head part, the rotational flow wind is formed under the action of the rotational flow wind formed on the inner swirler 5 at the head part and forms a clamp belt with the pulverized coal entering at a constant speed, the pulverized coal is fully dispersed in the combustion chamber and fully mixed and rotates forwards, meanwhile, the primary wind entering the outer rotational flow wind channel passes through the outer swirler 3 at the head part, and the rotational flow inclined hole plate at a certain rotational flow angle is formed on the outer swirler 3 at the head part, the rotary combustor has the advantages that the rotary forward air flow is formed under the action of the rotary combustor, the rotating direction is the same as that of the inner cyclone air flow, the coal dust and the inner cyclone air flow are subjected to enhanced rotating trend at the outlet of the combustor and are mixed with the inner cyclone air flow for supporting combustion, due to the action of the double cyclone air flows, flames of the combustor are relatively regular and strong and the shape of the flames of the combustor is adjustable, the coal dust can be fully combusted, stronger coal quality adaptability is achieved, the utilization rate of fuel gas is improved, more stable heat concentration is achieved, meanwhile, the under-oxygen combustion is combined, and the generation and the emission of NOx can be effectively inhibited.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A double cyclone burner for cement clinker production is characterized in that: including the main line, the internally mounted of main line has fuel pipe (11), the front of main line is close to one end and installs the axial flow wind channel, the outside of main line is close to the centre and installs outer whirl wind channel, the top surface of main line is close to the centre and installs the buggy wind channel, install outer whirl wind channel between outer whirl wind channel and the main line, adjusting device is installed to the one end of main line, interior whirl wind channel includes swirler (5) and interior swirler connecting piece (6) in the head, the buggy wind channel includes head buggy export (4) and middle part buggy export (7), outer whirl wind channel includes outer swirler (3) of head and outer swirler connecting piece (8), the axial flow wind channel includes head sprayer (2) and sprayer connecting piece (9), the big urceolus (1) of head and the big urceolus (10) in middle part are installed in the outside of main line.
2. The dual cyclone burner for cement clinker production according to claim 1, wherein: four primary air inlets are formed in the main pipeline and respectively comprise a pulverized coal air duct opening, an axial flow air duct opening, an inner rotational flow air duct opening and an outer rotational flow air duct opening, and the four primary air inlets are connected through a sleeve and are staggered in the axial direction.
3. A dual cyclone burner for cement clinker production according to claim 1, characterized in that: the head inner swirler (5) and the head outer swirler (3) are both internally provided with swirl inclined hole plates, inner swirl air is sprayed out along the tangential direction of the inclined holes, the head inner swirler (5) and the inner swirl air duct are movably arranged, and the tangential angle change range of the spray nozzle is 40-50 degrees.
4. The dual cyclone burner for cement clinker production according to claim 1, wherein: the angle between the pulverized coal air duct and the main pipeline is 15 degrees, and the head inner swirler (5), the inner swirler connecting piece (6), the head pulverized coal outlet (4), the middle pulverized coal outlet (7), the head outer swirler (3), the outer swirler connecting piece (8), the head ejector (2) and the ejector connecting piece (9) are in threaded connection.
5. The dual cyclone burner for cement clinker production according to claim 1, wherein: the novel coal powder spraying machine is characterized in that the large head outer barrel (1) and the large middle outer barrel (10) are in bolted connection with a main pipeline, the fuel oil pipe (11), the inner rotational flow air channel, the coal powder air channel, the outer rotational flow air channel and the axial flow air channel are in through connection, and the fuel oil pipe (11), the inner rotational flow air channel, the coal powder air channel, the outer rotational flow air channel and the axial flow air channel are in threaded connection with the main pipeline.
6. The dual cyclone burner for cement clinker production according to claim 1, wherein the dual cyclone burner is used in the following steps:
the method comprises the following steps: coal powder enters a pipeline through a coal powder air channel, the coal powder inlet is subjected to wear-resisting treatment, and meanwhile, the angle between the coal powder air channel inlet and a main pipeline is 15 degrees through calculation simulation, so that the abrasion generated when the coal powder enters a burner body is reduced, the service life of the device is prolonged, the coal powder is sprayed out from a head coal powder outlet (4) of the burner, axial air is formed through a head injector (2) after primary air enters an axial flow air channel and is mixed with the coal powder sprayed out from the head coal powder outlet (4) to drive the coal powder to move axially, and meanwhile, secondary air in a combustion chamber is drawn into a combustion head to continuously participate in combustion because the axial air speed is too high, the air speed of the axial flow air is reasonably matched through optimization design and air quantity, the air speed of the axial flow air is larger than 300m/s, 160-180m/s of outer rotational air, 140-160m/s of coal air and inner rotational air are also increased because the air speed of the axial flow air is high, the pressure difference of the combustion chamber is also increased, the capacity of the secondary air entrainment of the burner is stronger, the proportion of primary air is reduced to 6-7%, the cost is saved, and the environment is protected;
step two: in addition, primary air enters the cyclone air duct opening and then respectively enters the inner cyclone air duct and the outer cyclone air duct, a valve is arranged at the position of the inner and outer cyclone air duct openings, the air volume of the inner and outer cyclone air ducts can be controlled, the primary air of the inner cyclone air duct passes through the inner head cyclone (5), the inner head cyclone (5) is provided with a cyclone inclined orifice plate with a variable cyclone angle, rotary air is formed under the action of the valve, entrainment is formed with pulverized coal entering at a constant speed, the pulverized coal is fully dispersed in the combustion chamber and fully mixed with the combustion chamber to rotate forwards, meanwhile, the primary air entering the outer cyclone air duct passes through the outer head cyclone (3), the outer head cyclone (3) is provided with the cyclone inclined orifice plate with a certain cyclone angle, airflow rotating forwards is formed under the action of the cyclone inclined orifice plate, the rotating direction is the same as that of the inner cyclone air, the rotating trend of the pulverized coal and the inner cyclone airflow is strengthened and mixed with the pulverized coal and the inner cyclone airflow to support combustion, and the flame of the dual air flows is relatively, so that the pulverized coal can be fully combusted, the burner has stronger coal quality adaptability, the utilization rate of gas is improved, the combustion and the NOx emission and the NOx can be effectively inhibited by combining the oxygen shortage and the NOx emission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210899446.7A CN115264500A (en) | 2022-07-28 | 2022-07-28 | Double-cyclone burner for cement clinker production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210899446.7A CN115264500A (en) | 2022-07-28 | 2022-07-28 | Double-cyclone burner for cement clinker production |
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| CN115264500A true CN115264500A (en) | 2022-11-01 |
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| CN202210899446.7A Pending CN115264500A (en) | 2022-07-28 | 2022-07-28 | Double-cyclone burner for cement clinker production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117704368A (en) * | 2024-01-19 | 2024-03-15 | 南京巨华工业技术有限公司 | Coal-saving burner |
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2022
- 2022-07-28 CN CN202210899446.7A patent/CN115264500A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117704368A (en) * | 2024-01-19 | 2024-03-15 | 南京巨华工业技术有限公司 | Coal-saving burner |
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