CN109611832B - Burner for multi-channel double-vortex rotary kiln - Google Patents
Burner for multi-channel double-vortex rotary kiln Download PDFInfo
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- CN109611832B CN109611832B CN201910045720.2A CN201910045720A CN109611832B CN 109611832 B CN109611832 B CN 109611832B CN 201910045720 A CN201910045720 A CN 201910045720A CN 109611832 B CN109611832 B CN 109611832B
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- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
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- F23D1/00—Burners for combustion of pulverulent fuel
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Abstract
The invention relates to a burner for a multi-channel double-vortex rotary kiln, which is sequentially nested from outside to inside with an axial flow air outer pipe, an axial flow air inner pipe, an outer vortex air inner pipe, a coal air inner pipe, an inner vortex air inner pipe and an atomizer guide pipe, wherein one end of each pipeline is assembled to form a burner nozzle; at the nozzle end, an atomizer joint and an oil pipe which are fixedly connected are sequentially arranged in the atomizer guide pipe, and the oil pipe is connected to an oil supply device outside the combustor; the other ends of the axial flow air outer pipe, the axial flow air inner pipe, the outer rotational flow air inner pipe and the inner rotational flow air inner pipe are communicated with a combustion-supporting air main pipeline through pipelines, the other end of the coal air inner pipe is communicated with a coal air power device, and the other end of the atomizer guide pipe is communicated with an oil supply device; at the end opposite to the burner nozzle, the adjacent pipelines are mutually connected in a sealing way. The invention can flexibly adjust the airflow velocity and the flame shape of each channel, and can also be fully mixed and combusted with air when the quality of coal air is poor, thereby optimizing the problem of coal air combustion rate, saving coal consumption and reducing environmental pollution.
Description
Technical Field
The invention relates to the field of burners for kilns, in particular to a burner for a multi-channel double-vortex rotary kiln.
Background
In the lime rotary kiln production line, active lime is obtained by calcining limestone at high temperature, fuel and oxygen air are required to be fully mixed and sprayed into the rotary kiln at a certain speed for combustion during high-temperature calcination, the existing process only uses a simple single pipeline or four channels to mix coal air and spray the mixture into the rotary kiln for combustion, the coal consumption is high, the combustion efficiency is low, a large amount of nitrogen oxide waste gas is generated, and the yield of the active lime is low.
Disclosure of Invention
The invention provides a combustor for a multi-channel double-vortex rotary kiln, aiming at solving the technical problems in the prior art that coal air is not completely combusted, the amount of cold air used is large, the coal consumption is high, the generation of nitrogen oxides is high, and the shape of flame is not ideal.
The technical scheme for solving the technical problems is as follows: the burner nozzle is formed by sequentially nesting an axial flow air outer pipe, an axial flow air inner pipe, an outer rotational flow air inner pipe, a coal air inner pipe, an inner rotational flow air inner pipe and an atomizer guide pipe from outside to inside, wherein one ends of the axial flow air outer pipe, the axial flow air inner pipe, the outer rotational flow air inner pipe, the coal air inner pipe, the inner rotational flow air inner pipe and the atomizer guide pipe are integrated to form the burner nozzle; at one end away from a burner nozzle, the axial flow air outer pipe is hermetically connected with the axial flow air inner pipe, the axial flow air inner pipe is hermetically connected with the outer rotational flow air inner pipe, the outer rotational flow air inner pipe is hermetically connected with the coal air inner pipe, the coal air inner pipe is hermetically connected with the inner rotational flow air inner pipe, and the inner rotational flow air inner pipe is hermetically connected with the atomizer guide pipe; at burner nozzle one end, be equipped with fixed connection's atomizer, atomizer joint and oil pipe in the atomizer pipe in proper order, oil pipe inserts the outer oil supply unit of combustor.
An ignition oil gun channel is formed in the atomizer guide pipe, the atomizer guide pipe and the inner cyclone air inner pipe form a central air channel, the inner cyclone air inner pipe and the coal air inner pipe form an inner cyclone air channel, the coal air inner pipe and the outer cyclone air inner pipe form a coal air channel, the outer cyclone air inner pipe and the axial flow air inner pipe form an outer cyclone air channel, and the axial flow air inner pipe and the axial flow air outer pipe form an axial flow air channel.
The main channel of the combustion-supporting air is supplied with air in advance, after ignition is carried out in the ignition oil gun channel, flame is sprayed out of a burner nozzle, coal air (the main component of which is pulverized coal) is blown out from the coal air channel, the air blown out from the central air channel and inner-layer coal air are preswirl and fully mixed by inner cyclone air of the inner cyclone air channel and then are combusted, the axial flow air blown out from the axial flow air channel and outer-layer coal air are fully mixed by outer cyclone air of the outer cyclone channel and then are combusted, and heat energy generated by combustion supplies energy for the calcination process of the lime rotary kiln. The invention can better mix the inner layer coal dust and the combustion-supporting wind, and can fully burn even if the coal dust is poor in quality or the humidity of the coal dust is larger.
On the basis of the technical scheme, the invention can be further improved as follows.
Preferably, the axial flow air outer pipe is coaxially provided with an axial flow air outer pipe at one end of the burner nozzle, and the axial flow air outer pipe is sleeved on the outer wall of the axial flow air outer pipe; the axial flow air outer pipe is provided with an axial flow air compensator at one end opposite to the burner nozzle, the axial flow air compensator comprises a fixed part and a movable part, the axial flow air outer pipe is connected with the movable end of the axial flow air compensator, and the axial flow air inner pipe is connected with the fixed part of the axial flow air compensator; a branch pipeline is arranged at the position, close to the movable part of the axial flow wind compensator, of the axial flow wind outer pipe and connected into a combustion-supporting wind main pipeline, and an axial flow wind adjusting valve is arranged in the branch pipeline; and an axial flow air pressure gauge is further installed on the axial flow air outer pipe close to the branch pipeline. Under the real-time monitoring of the axial flow air pressure gauge on the air speed in the axial flow air channel, the axial flow air adjusting valve can change the air volume and the air speed of the axial flow air channel in a large range by changing the sectional area of the axial flow air channel, the position of the outer tube of the axial flow air is moved by the movable part of the telescopic axial flow air compensator, the sectional area of the outlet of the air channel can be indirectly changed in a small range, and the requirements of adjusting the air speed of the axial flow air and adjusting the shape of flame in a small range are.
Preferably, an axial flow air inner cylinder threaded pipe and an axial flow air inner nozzle are coaxially arranged at one end of the burner nozzle of the axial flow air inner pipe, and the axial flow air inner pipe, the axial flow air inner cylinder threaded pipe and the axial flow air inner nozzle are sequentially in threaded connection; an outer cyclone air compensator is arranged at one end, opposite to the burner nozzle, of the axial flow air inner pipe, the outer cyclone air compensator comprises a fixed part and a movable part, the axial flow air inner pipe is connected with the movable part of the outer cyclone air compensator, the outer cyclone air inner pipe is connected with the fixed part of the outer cyclone air compensator, a branch pipeline is arranged at the position, close to the movable part of the outer cyclone air compensator, of the axial flow air inner pipe, a main combustion air pipeline is connected into the branch pipeline, and an outer cyclone air adjusting valve is arranged in the branch pipeline; and an outer rotational flow air pressure gauge is further installed on the axial flow air inner pipe close to the branch pipeline. Under the real-time monitoring of the outer cyclone wind pressure gauge on the wind speed in the outer cyclone wind channel, the outer cyclone wind adjusting valve can change the wind volume and the wind speed of the outer cyclone wind channel in a large range by changing the sectional area of the wind channel, the position of the inner pipe of the axial flow wind is moved by the movable part of the telescopic outer cyclone wind compensator, the sectional area of the outlet of the wind channel can be indirectly changed in a small range, and the requirements of adjusting the wind speed of the outer cyclone wind and adjusting the shape of flame in a small range are met.
Preferably, an outer cyclone wind threaded pipe and an outer cyclone wind cyclone are coaxially arranged at one end of the burner nozzle of the outer cyclone wind inner pipe, and the outer cyclone wind inner pipe, the outer cyclone wind threaded pipe and the outer cyclone wind cyclone are sequentially in threaded connection; the outer cyclone air inner pipe is back on the burner nozzle, one end of the burner nozzle is fixedly connected with the coal air inner pipe through a flange, a coal air inlet pipeline is arranged at the position, close to the flange, of the outer cyclone air inner pipe, and the coal air inlet pipeline is communicated with a coal air power device. The coal air conveyed through the coal air channel is sprayed out of the burner nozzle, and the sprayed coal air is mixed with air and then is combusted.
Preferably, a coal air inner nozzle threaded pipe and a coal air inner nozzle are coaxially arranged at one end of the burner nozzle of the coal air inner pipe, and the coal air inner pipe, the coal air inner nozzle threaded pipe and the coal air inner nozzle are sequentially in threaded connection; an inner cyclone air outlet area adjusting device is arranged at one end, opposite to the burner nozzle, of the coal air inner pipe, the inner cyclone air outlet area adjusting device comprises a fixed part and a movable part, the coal air inner pipe is connected with the movable part of the inner cyclone air outlet area adjusting device, and the inner cyclone air inner pipe is connected with the fixed part of the inner cyclone air outlet area adjusting device; a branch pipeline is arranged at the position of the coal air inner pipe, close to the movable part of the inner cyclone air outlet area adjusting device, and is connected with a combustion-supporting air main pipeline, and an inner cyclone air adjusting valve and an inner cyclone air compensator are sequentially arranged in the branch pipeline along the wind direction; an inner cyclone air pressure gauge is further installed on the coal air inner pipe close to the branch pipeline. Under the real-time monitoring of the internal cyclone air pressure gauge on the air speed in the internal cyclone air channel, the internal cyclone air adjusting valve can change the air volume and the air speed of the internal cyclone air channel in a large range by changing the sectional area of the air channel, and the position of the coal air inner tube is moved by the movable part of the telescopic internal cyclone air outlet area adjusting device, so that the sectional area of the air channel outlet can be indirectly changed in a small range, and the requirements of adjusting the internal cyclone air speed and adjusting the flame shape in a small range are met.
Preferably, an inner rotational flow threaded pipe and an inner rotational flow wind swirler are coaxially arranged at one end of the burner nozzle of the inner rotational flow wind inner pipe, and the inner rotational flow wind inner pipe, the inner rotational flow threaded pipe and the inner rotational flow wind swirler are sequentially in threaded connection; one end, back to the burner nozzle, of the inner cyclone air inner pipe is fixedly connected with the atomizer guide pipe through a flange, a branch pipeline is arranged at the position, close to the flange, of the coal air inner pipe and connected into a combustion air main pipeline, and a central air adjusting valve is arranged in the branch pipeline; and a central air pressure gauge is also arranged on the inner swirling air inner pipe close to the branch pipeline. Under the condition that the central wind pressure gauge monitors the wind speed in the central wind channel in real time, the central wind adjusting valve can change the wind volume and the wind speed of the central wind channel by changing the sectional area of the wind channel.
Preferably, a central wind end cover plate is vertically arranged at one end of the burner nozzle of the atomizer guide pipe, the central wind end cover plate is fixedly connected with the atomizer guide pipe, and a plurality of through holes which are circumferentially arranged are vertically arranged on the central wind end cover plate; and one end of the atomizer guide pipe, which is back to the burner nozzle, is connected with an oil supply device outside the burner. The central wind blows out of the central wind channel through a plurality of through holes of the central wind end cover plate, and the through holes are arranged in a circumferential mode, so that the central wind is more uniform.
Preferably, the combustion-supporting air main channel is provided with a side air pipe compensator, the installation position of the side air pipe compensator can be flexibly adjusted relatively, the side air pipe compensator mainly plays a role in buffering, and the requirement of pipeline movement under partial conditions can be met.
Preferably, a flame gathering cover is coaxially arranged outside the burner nozzle, one end of the flame gathering cover is sleeved on the outer wall of the burner nozzle, and the other end of the flame gathering cover extends out of the burner nozzle and is suspended in the air. The flame gathering cover can enable flame to be more concentrated, and when limestone is calcined in the rotary kiln, the concentrated flame is higher in calcining efficiency and higher in heat energy utilization rate.
Preferably, the burner nozzle is externally wrapped with a heat-resistant castable, and the shape of the heat-resistant castable is matched with that of the rotary kiln. The heat-resistant castable can reduce the damage of high temperature in the rotary kiln to the burner body.
Preferably, the shapes of the axial flow air outer cylinder, the axial flow air inner nozzle, the outer rotational flow air cyclone, the coal air inner nozzle and the inner rotational flow air cyclone are matched with each other, so that the axial flow air channel, the outer rotational flow channel and the inner rotational flow channel form a conical cavity structure with a large inside and a small outside at a position close to the burner nozzle; the movable end of the axial flow air compensator, the movable end of the outer rotational flow air compensator and the movable end of the inner rotational flow air outlet area adjusting device are stretched or compressed, so that the relative positions of the axial flow air outer cylinder, the axial flow air inner nozzle and the outer rotational flow air cyclone can be correspondingly moved, the sectional area and the air outlet angle of each air outlet of the burner nozzle are further adjusted, and the aim of adjusting the air speed and the air quantity of the corresponding air duct and the shape of flame within a small range is indirectly achieved.
By adopting the burner for the multi-channel double-vortex rotary kiln, the air channel sectional areas and the air outlet angles of the axial flow air channel, the outer vortex air channel, the inner vortex air channel and the central air channel can be independently adjusted, so that the spraying speed of air and the flame shape are changed, and the original purpose of adjusting the flame shape and strength by using large air volume is achieved by using few cold primary air; the pressure gauges are arranged corresponding to the combustion-supporting air channels, so that the air pressure and the speed of air flow of each combustion-supporting air channel at the outlet of the combustor can be indirectly obtained on site conveniently, and the flame condition of the combustor can be better adjusted; the arrangement of the central air and the inner swirling air can solve the problems that coal air (especially inner layer coal air) is not completely combusted and nitrogen oxides are generated highly in the prior art; meanwhile, the flow velocity of airflow of each channel can be flexibly adjusted in the technical scheme of the invention, and the pulverized coal can be fully mixed with air and fully combusted when the quality of the pulverized coal is poor, so that the problem of pulverized coal combustion rate is optimized, the coal consumption is saved, and the environmental pollution is reduced.
Drawings
FIG. 1 is an overall composition diagram of the present invention;
FIG. 2 is a right side sectional view of the burner tip of the present invention;
fig. 3 is a front view of the burner tip of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an axial flow air pressure gauge, 2, an axial flow air compensator, 3, an outer rotational flow air pressure gauge, 4, an outer rotational flow air compensator, 5, a coal air inlet pipeline, 6, an inner rotational flow air pressure gauge, 7, an inner rotational flow air outlet area adjusting device, 8, a central air pressure gauge, 9, an inner rotational flow air adjusting valve, 10, a central air adjusting valve, 11, a combustion air main pipeline, 12, an inner rotational flow air compensator, 13, an outer rotational flow air adjusting valve, 14, a lateral air pipe compensator, 15, an axial flow air adjusting valve, 16, a burner nozzle, 161, an atomizer joint, 162, an atomizer, 163, a central air end cover plate, 164, an inner rotational flow air swirler, 165, a coal air inner nozzle, 166, an outer rotational flow air swirler, 167, an axial flow air inner nozzle, 168, a flame holding cover, 169, an axial flow air outer cylinder, 1610, an inner rotational flow air threaded pipe, 1611, a coal air inner nozzle threaded pipe, 1612, an outer rotational flow air threaded pipe, 1613. Axial flow wind inner barrel threaded pipe 1614, axial flow wind outer pipe 1615, axial flow wind inner pipe, 1616, outer rotational flow wind inner pipe, 1617, coal wind inner pipe, 1618, inner rotational flow wind inner pipe, 1619, atomizer conduit, 1620, oil pipe, 17 and heat-resistant castable;
the ignition oil gun comprises an A axial flow air channel, a B outer cyclone air channel, a C coal air channel, a D inner cyclone air channel, an E center air channel and an F ignition oil gun channel.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 3, an axial flow air outer tube 1614, an axial flow air inner tube 1615, an outer swirling air inner tube 1616, a coal air inner tube 1617, an inner swirling air inner tube 1618, and an atomizer conduit 1619 are sequentially nested from outside to inside, the axial flow air outer tube 1614, the axial flow air inner tube 1615, the outer swirling air inner tube 1616, the coal air inner tube 1617, the inner swirling air inner tube 1618, and one end of the atomizer conduit 1619 are assembled to form a burner head 16, the other ends of the axial flow air outer tube 1614, the axial flow air inner tube 1615, the outer swirling air inner tube 1616, and the inner swirling air inner tube 1618 are connected to a combustion-supporting air main pipe 11 through a pipe, the other end of the coal air inner tube 1617 is connected to a coal air power device, and the other end of the; at one end far away from a burner nozzle, the axial flow air outer pipe 1614 is connected with the axial flow air inner pipe 1615 in a sealing manner, the axial flow air inner pipe 1615 is connected with the outer swirling air inner pipe 1616 in a sealing manner, the outer swirling air inner pipe 1616 is connected with the coal air inner pipe 1617 in a sealing manner, the coal air inner pipe 1617 is connected with the inner swirling air inner pipe 1618 in a sealing manner, and the inner swirling air inner pipe 1618 is connected with the atomizer guide pipe 1619 in a sealing manner; at one end of the burner nozzle 16, an atomizer 162, an atomizer joint 161 and an oil pipe 1620 which are fixedly connected are sequentially arranged in the atomizer conduit 1619, and the oil pipe 1620 is connected to an oil supply device outside the burner.
An ignition oil gun channel F is formed in the atomizer guide tube 1619, a central air channel E is formed by the atomizer guide tube 1619 and the inner cyclone air inner tube 1618, an inner cyclone air channel D is formed by the inner cyclone air inner tube 1618 and the coal air inner tube 1617, a coal air channel C is formed by the coal air inner tube 1617 and the outer cyclone air inner tube 1616, an outer cyclone air channel B is formed by the outer cyclone air inner tube 1616 and the axial flow air inner tube 1615, and an axial flow air channel A is formed by the axial flow air inner tube 1615 and the axial flow air outer tube 1614.
The main combustion-supporting air channel 11 is used for supplying air in advance, after ignition is carried out in the ignition oil gun channel F, flame is sprayed out of the burner nozzle 16, coal air (the main component of which is coal powder) is blown out from the coal air channel C, the air blown out from the central air channel E and inner-layer coal air are pre-swirled and fully mixed by inner-swirling air of the inner-swirling air channel D and then are combusted, the axial flow air blown out from the axial flow air channel A and outer-layer coal air are fully mixed by outer-swirling air of the outer-swirling air channel B and then are combusted, and heat energy generated by combustion supplies energy for the lime rotary kiln calcining process. The invention can better mix the inner layer coal dust and the combustion-supporting wind, and can fully burn even if the coal dust is poor in quality or the humidity of the coal dust is larger.
In this embodiment, the axial flow air outer tube 1614 is coaxially provided with an axial flow air outer tube 169 at one end of the burner nozzle 16, and the axial flow air outer tube 169 is sleeved on the outer wall of the axial flow air outer tube 1614; the axial flow wind outer pipe 1614 is provided with an axial flow wind compensator 2 at one end opposite to the burner nozzle 16, the axial flow wind compensator 2 comprises a fixed part and a movable part, the axial flow wind outer pipe 1614 is connected with the movable end of the axial flow wind compensator 2, and the axial flow wind inner pipe 1615 is connected with the fixed part of the axial flow wind compensator 2; a branch pipeline is arranged at the position, close to the movable part of the axial flow wind compensator 2, of the axial flow wind outer pipe 1614 and connected into a combustion-supporting wind main pipeline 11, and an axial flow wind adjusting valve 15 is arranged in the branch pipeline; an axial-flow air pressure gauge 1 is further installed on the axial-flow air outer tube 1614 near the branch pipeline. Under the real-time monitoring of the axial flow air pressure gauge on the air speed in the axial flow air channel A, the axial flow air adjusting valve 15 can change the air volume and the air speed of the axial flow air channel A in a large range by changing the sectional area of the axial flow air channel A, the position of the axial flow air outer pipe 1614 is moved by the movable part of the telescopic axial flow air compensator 2, the sectional area of the air channel outlet can be indirectly changed in a small range, and the requirements of adjusting the air speed of the axial flow air and adjusting the shape of flame in a small range are met.
In this embodiment, the axial flow air inner tube 1615 is coaxially provided with an axial flow air inner tube threaded tube 1613 and an axial flow air inner nozzle 167 at one end of the burner nozzle 16, and the axial flow air inner tube 1615, the axial flow air inner tube threaded tube 1613 and the axial flow air inner nozzle 167 are sequentially in threaded connection; an outer cyclone air compensator 4 is arranged at one end, opposite to the burner nozzle 16, of the axial flow air inner pipe 1615, the outer cyclone air compensator 4 comprises a fixed part and a movable part, the axial flow air inner pipe 1615 is connected with the movable part of the outer cyclone air compensator 4, the outer cyclone air inner pipe 1616 is connected with the fixed part of the outer cyclone air compensator 4, a branch pipe connected to a combustion air main pipe 11 is arranged at the position, close to the movable part of the outer cyclone air compensator 4, of the axial flow air inner pipe 1615, and an outer cyclone air adjusting valve 13 is arranged in the branch pipe; an outer cyclone air pressure gauge 3 is further installed on the axial flow air inner pipe 1615 near the branch pipeline. Under the real-time monitoring of the outer cyclone air pressure gauge 3 on the air speed in the outer cyclone air channel B, the outer cyclone air adjusting valve 13 can change the air volume and the air speed of the outer cyclone air channel B in a large range by changing the sectional area of the air channel, and the position of the axial flow air inner pipe 1615 is moved by the movable part of the telescopic outer cyclone air compensator 4, so that the sectional area of the air channel outlet can be indirectly changed in a small range, and the requirements of adjusting the air speed of the outer cyclone air and adjusting the shape of flame in a small range are met.
In this embodiment, an outer cyclone wind threaded pipe 1612 and an outer cyclone wind cyclone (166) are coaxially arranged at one end of the burner nozzle 16 of the outer cyclone wind inner pipe 1616, and the outer cyclone wind inner pipe 1616, the outer cyclone wind threaded pipe 1612 and the outer cyclone wind cyclone 166 are sequentially in threaded connection; the outer cyclone air inner pipe 1616 is fixedly connected with the coal air inner pipe 1617 through a flange at the end opposite to the burner nozzle 16, a coal air inlet pipeline 5 is arranged at the position, close to the flange, of the outer cyclone air inner pipe 1616, and the coal air inlet pipeline 5 is communicated with a coal air power device. The coal air delivered through the coal air passage C is ejected out of the burner head 16, and the ejected coal air is mixed with air and then burned.
In this embodiment, the coal air inner tube 1617 is coaxially provided with a coal air inner nozzle threaded tube 1611 and a coal air inner nozzle 165 at one end of the burner nozzle 16, and the coal air inner tube 1617, the coal air inner nozzle threaded tube 11 and the coal air inner nozzle 165 are sequentially in threaded connection; an inner cyclone air outlet area adjusting device 7 is arranged at one end, opposite to the burner nozzle 16, of the coal air inner pipe 1617, the inner cyclone air outlet area adjusting device 7 comprises a fixed part and a movable part, the coal air inner pipe 1617 is connected with the movable part of the inner cyclone air outlet area adjusting device 7, and the inner cyclone air inner pipe 1618 is connected with the fixed part of the inner cyclone air outlet area adjusting device 7; a branch pipeline is arranged at the position, close to the movable part of the inner cyclone air outlet area adjusting device 7, of the coal air inner pipe 1617 and connected into a combustion-supporting air main pipeline 11, and an inner cyclone air adjusting valve 9 and an inner cyclone air compensator 12 are sequentially arranged in the branch pipeline along the wind direction; an inner cyclone air pressure gauge 6 is further installed on the coal air inner pipe 1617 near the branch pipeline. Under the real-time monitoring of the wind speed in the inner cyclone wind channel D by the inner cyclone wind pressure gauge 6, the wind volume and the wind speed of the inner cyclone wind channel D can be changed in a large range by changing the sectional area of the wind channel by the inner cyclone wind adjusting valve 9, the position of the coal wind inner tube 1617 is moved by the movable part of the telescopic inner cyclone wind outlet area adjusting device 7, the sectional area of the wind channel outlet can be indirectly changed in a small range, and the requirements of adjusting the wind speed of the inner cyclone wind and adjusting the shape of flame in the small range are met.
In this embodiment, the inner swirling air inner tube 1618 is coaxially provided with an inner swirling threaded tube 1610 and an inner swirling air swirler 164 at one end of the burner nozzle 16, and the inner swirling air inner tube 1618, the inner swirling threaded tube 1610 and the inner swirling air swirler 164 are sequentially in threaded connection; one end, opposite to the burner nozzle 16, of the inner cyclone air inner pipe 1618 is fixedly connected with the atomizer guide pipe 1619 through a flange, a branch pipeline is arranged at a position, close to the flange, of the coal air inner pipe 1617 and connected to a combustion air main pipeline 11, and a central air adjusting valve 10 is arranged in the branch pipeline; and a central air pressure gauge 8 is further arranged on the inner swirling air inner pipe 1618 near the branch pipeline. Under the real-time monitoring of the central air pressure gauge 8 on the wind speed in the central air passage E, the central air regulating valve 10 can change the wind volume and the wind speed of the central air passage E by changing the sectional area of the air passage.
In this embodiment, the atomizer conduit 1619 is vertically provided with a central wind end cover plate 163 at one end of the burner nozzle 16, the central wind end cover plate 163 is fixedly connected to the atomizer conduit 1619, and the central wind end cover plate 163 is vertically provided with a plurality of circumferentially arranged through holes; the atomizer conduit 1619 is connected to an oil supply device outside the burner opposite to the burner head 16. The central wind blows out the central wind channel E through the plurality of through holes of the central wind end cover plate 163, and the plurality of through holes are arranged circumferentially, so that the central wind blows out more uniformly.
In this embodiment, the combustion-supporting air main channel 11 is provided with the side air duct compensator 14, and the side air duct compensator 14 can relatively flexibly adjust the installation position, mainly plays a role in buffering, and can meet the requirement of small-range movement of the pipeline under some conditions.
In this embodiment, a flame gathering cover 168 is coaxially disposed outside the burner nozzle 16, and one end of the flame gathering cover 168 is sleeved on the outer wall of the burner nozzle 16, and the other end of the flame gathering cover 168 extends out of the burner nozzle 16 and is suspended. The flame gathering cover can enable flame to be more concentrated, and when limestone is calcined in the rotary kiln, the concentrated flame is higher in calcining efficiency and higher in heat energy utilization rate.
In this embodiment, the burner nozzle 16 is externally wrapped with a heat-resistant castable 17, and the shape of the heat-resistant castable 17 is matched with that of the rotary kiln. The heat-resistant castable 17 can reduce the damage of high temperature in the rotary kiln to the burner body.
The use principle of each compensator related in the embodiment is as follows; the corrugated pipe is provided with a corrugated pipe similar to an organ structure, the corrugated pipe can be flexibly stretched and compressed within a certain range, two flanges are respectively arranged at two ends of the corrugated pipe, the flanges at the two ends are respectively fixedly connected with two different pipelines, and the purpose of enabling the two pipelines to move relatively can be achieved through the telescopic corrugated pipe. The compensator can also be provided with a penetrating screw rod vertically on flanges at two ends of the corrugated pipe, the corrugated pipe is made to stretch through the rotation of the screw rod, and the principle is applied to the inner cyclone air outlet area adjusting device 7 and the side air pipe compensator 14 in the embodiment.
The shapes of the axial flow air outer cylinder 169, the axial flow air inner nozzle 167, the outer rotational flow air cyclone 166, the coal air inner nozzle 165 and the inner rotational flow air cyclone 164 are matched with each other, so that the axial flow air channel A, the outer rotational flow air channel B and the inner rotational flow air channel D form a conical cavity structure with a large inside and a small outside at the position close to the burner nozzle 16; by stretching or compressing the movable end of the axial flow wind compensator 2, the movable end of the outer rotational flow wind compensator 4 and the movable end of the inner rotational flow wind outlet area adjusting device 7, the relative positions of the axial flow wind outer cylinder 169, the axial flow wind inner nozzle 167 and the outer rotational flow wind cyclone 166 can be correspondingly moved, so that the sectional area and the wind outlet angle of each wind outlet of the burner nozzle 16 are adjusted, and the aim of adjusting the wind speed and the wind volume of the corresponding wind channel and the shape of flame within a small range is indirectly achieved.
By adopting the burner for the multi-channel double-vortex rotary kiln, the air channel sectional areas and the air outlet angles of the axial flow air channel A, the outer vortex air channel B, the inner vortex air channel D and the central air channel E can be independently adjusted, so that the spraying speed of air and the flame shape are changed, and the original purpose of adjusting the flame shape and strength by using large air volume is achieved by using few cold primary air; the pressure gauges are arranged corresponding to the combustion-supporting air channels, so that the air pressure and the speed of air flow of each combustion-supporting air channel at the outlet of the combustor can be indirectly obtained on site conveniently, and the flame condition of the combustor can be better adjusted; the arrangement of the central air and the inner swirling air can solve the problems that coal air (especially inner layer coal air) is not completely combusted and nitrogen oxides are generated highly in the prior art; meanwhile, the flow velocity of airflow of each channel can be flexibly adjusted in the technical scheme of the invention, and the pulverized coal can be fully mixed with air and fully combusted when the quality of the pulverized coal is poor, so that the problem of pulverized coal combustion rate is optimized, the coal consumption is saved, and the environmental pollution is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A burner for a multi-channel double-vortex rotary kiln is characterized in that an axial flow air outer pipe (1614), an axial flow air inner pipe (1615), an outer vortex air inner pipe (1616), a coal air inner pipe (1617), an inner vortex air inner pipe (1618) and an atomizer guide pipe (1619) are sequentially nested from outside to inside, one end of the axial flow air outer pipe (1614), the axial flow air inner pipe (1615), the outer rotational flow air inner pipe (1616), the coal air inner pipe (1617), the inner rotational flow air inner pipe (1618) and the atomizer guide pipe (1619) are assembled to form a burner nozzle (16), the other end of the axial flow air outer pipe (1614), the axial flow air inner pipe (1615), the outer rotational flow air inner pipe (1616) and the inner rotational flow air inner pipe (1618) is communicated with a combustion-supporting air main pipeline (11) through pipelines, the other end of the coal air inner pipe (1617) is communicated with a coal air power device, and the other end of the atomizer guide pipe (1619) is communicated with an oil supply device; at one end facing away from a burner nozzle, the axial flow air outer pipe (1614) is in sealed connection with the axial flow air inner pipe (1615), the axial flow air inner pipe (1615) is in sealed connection with the outer cyclone air inner pipe (1616), the outer cyclone air inner pipe (1616) is in sealed connection with the coal air inner pipe (1617), the coal air inner pipe (1617) is in sealed connection with the inner cyclone air inner pipe (1618), and the inner cyclone air inner pipe (1618) is in sealed connection with the atomizer guide pipe (1619); an atomizer (162), an atomizer joint (161) and an oil pipe (1620) which are fixedly connected are sequentially arranged at one end of a burner nozzle in an atomizer guide pipe (1619), the oil pipe (1620) is connected to an oil supply device outside the burner, a central wind end cover plate (163) is vertically arranged at one end of the burner nozzle (16) of the atomizer guide pipe (1619), the central wind end cover plate (163) is fixedly connected with the atomizer guide pipe (1619), and a plurality of through holes which are circumferentially arranged are vertically arranged on the central wind end cover plate (163); one end, back to the burner nozzle (16), of the atomizer guide pipe (1619) is connected to an oil supply device outside the burner.
2. The burner for the multi-channel double-vortex rotary kiln as claimed in claim 1, wherein the axial flow air outer tube (1614) is coaxially provided with an axial flow air outer tube (169) at one end of the burner nozzle (16), and the axial flow air outer tube (169) is sleeved on the outer wall of the axial flow air outer tube (1614); the axial flow wind compensator (2) is arranged at one end, back to the burner nozzle (16), of the axial flow wind outer pipe (1614), the axial flow wind compensator (2) comprises a fixed part and a movable part, the axial flow wind outer pipe (1614) is connected with the movable end of the axial flow wind compensator (2), and the axial flow wind inner pipe (1615) is connected with the fixed part of the axial flow wind compensator (2); a branch pipeline is arranged at the position, close to the movable part of the axial flow air compensator (2), of the axial flow air outer pipe (1614) and connected into a combustion-supporting air main pipeline (11), and an axial flow air adjusting valve (15) is arranged in the branch pipeline; an axial flow air pressure gauge (1) is further installed on the axial flow air outer pipe (1614) near the branch pipeline.
3. The burner for the multi-channel double-vortex rotary kiln as recited in claim 1, wherein the axial flow air inner tube (1615) is coaxially provided with an axial flow air inner tube threaded tube (1613) and an axial flow air inner tube nozzle (167) at one end of the burner nozzle (16), and the axial flow air inner tube (1615), the axial flow air inner tube threaded tube (1613) and the axial flow air inner nozzle (167) are sequentially in threaded connection; an outer cyclone air compensator (4) is arranged at one end, back to the burner nozzle (16), of the axial flow air inner pipe (1615), the outer cyclone air compensator (4) comprises a fixed part and a movable part, the axial flow air inner pipe (1615) is connected with the movable part of the outer cyclone air compensator (4), the outer cyclone air inner pipe (1616) is connected with the fixed part of the outer cyclone air compensator (4), a branch pipeline is arranged at the position, close to the movable part of the outer cyclone air compensator (4), of the axial flow air inner pipe (1615) and connected with a combustion-supporting air main pipeline (11), and an outer cyclone air adjusting valve (13) is arranged in the branch pipeline; an outer cyclone air pressure gauge (3) is further installed on the axial flow air inner pipe (1615) close to the branch pipeline.
4. The burner for the multi-channel double-vortex rotary kiln as claimed in claim 1, wherein an outer cyclone wind threaded pipe (1612) and an outer cyclone wind cyclone (166) are coaxially arranged on the outer cyclone wind inner pipe (1616) at one end of the burner nozzle (16), and the outer cyclone wind inner pipe (1616), the outer cyclone wind threaded pipe (1612) and the outer cyclone wind cyclone (166) are sequentially in threaded connection; the outer cyclone air inner pipe (1616) is back on one end of the burner nozzle (16) and fixedly connected with the coal air inner pipe (1617) through a flange, a coal air inlet pipeline (5) is arranged at the position, close to the flange, of the outer cyclone air inner pipe (1616), and the coal air inlet pipeline (5) is communicated with a coal air power device.
5. The burner for the multi-channel double-vortex rotary kiln as claimed in claim 1, wherein a coal air inner nozzle threaded pipe (1611) and a coal air inner nozzle (165) are coaxially arranged at one end of the burner nozzle (16) of the coal air inner pipe (1617), and the coal air inner nozzle threaded pipe (1617), the coal air inner nozzle threaded pipe (1611) and the coal air inner nozzle (165) are sequentially in threaded connection; an inner cyclone wind outlet area adjusting device (7) is arranged at one end, back to the burner nozzle (16), of the coal wind inner pipe (1617), the inner cyclone wind outlet area adjusting device (7) comprises a fixed part and a movable part, the coal wind inner pipe (1617) is connected with the movable part of the inner cyclone wind outlet area adjusting device (7), and the inner cyclone wind inner pipe (1618) is connected with the fixed part of the inner cyclone wind outlet area adjusting device (7); a branch pipeline is arranged at the position, close to the movable part of the inner cyclone wind outlet area adjusting device (7), of the coal wind inner pipe (1617) and connected with a combustion-supporting wind main pipeline (11), and an inner cyclone wind adjusting valve (9) and an inner cyclone wind compensator (12) are sequentially arranged in the branch pipeline along the wind direction; an inner cyclone air pressure gauge (6) is further installed on the coal air inner pipe (1617) close to the branch pipeline.
6. The burner for the multi-channel double-vortex rotary kiln as recited in claim 1, wherein the inner cyclone wind inner tube (1618) is coaxially provided with an inner cyclone threaded tube (1610) and an inner cyclone wind swirler (164) at one end of the burner nozzle (16), and the inner cyclone wind inner tube (1618), the inner cyclone threaded tube (1610) and the inner cyclone wind swirler (164) are sequentially in threaded connection; one end, back to the burner nozzle (16), of the inner cyclone air inner pipe (1618) is fixedly connected with the atomizer guide pipe (1619) through a flange, a branch pipeline is arranged at the position, close to the flange, of the coal air inner pipe (1617) and connected with a combustion air main pipeline (11), and a central air adjusting valve (10) is arranged in the branch pipeline; and a central air pressure gauge (8) is further arranged on the inner cyclone air inner pipe (1618) near the branch pipeline.
7. Burner for a multi-channel double-vortex rotary kiln according to claim 1, characterized in that the main combustion air channel (11) is provided with a side air duct compensator (14).
8. The burner for the multichannel double-vortex rotary kiln as claimed in claim 1, wherein a flame holding cover (168) is coaxially arranged outside the burner nozzle (16), one end of the flame holding cover (168) is sleeved on the outer wall of the burner nozzle (16), and the other end of the flame holding cover extends out of the burner nozzle (16) and is arranged in a suspended manner.
9. The burner for a multichannel double-vortex rotary kiln according to claim 1, characterized in that the burner nozzle (16) is externally wrapped with heat-resistant castable (17), and the shape of the heat-resistant castable (17) is matched with the rotary kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045720.2A CN109611832B (en) | 2019-01-17 | 2019-01-17 | Burner for multi-channel double-vortex rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910045720.2A CN109611832B (en) | 2019-01-17 | 2019-01-17 | Burner for multi-channel double-vortex rotary kiln |
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| CN109611832A CN109611832A (en) | 2019-04-12 |
| CN109611832B true CN109611832B (en) | 2020-09-08 |
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| CN201910045720.2A Active CN109611832B (en) | 2019-01-17 | 2019-01-17 | Burner for multi-channel double-vortex rotary kiln |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110500583B (en) * | 2019-09-11 | 2024-08-02 | 襄阳中和机电技术有限公司 | Combustion device with stable flame and no fluctuation and combustion control method |
| CN110657449A (en) * | 2019-09-20 | 2020-01-07 | 沈忠东 | Automatic adjusting mechanism and adjusting method for internal air and external air of combustor |
| KR20230133321A (en) | 2021-02-25 | 2023-09-19 | 다이헤이요 세멘토 가부시키가이샤 | Burner for cement kiln and its operation method |
| CN113375157B (en) * | 2021-06-22 | 2022-03-11 | 襄阳中和机电技术有限公司 | Intelligent rotary kiln combustor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1989001117A1 (en) * | 1985-09-09 | 1989-02-09 | Coen Company, Inc. | Pulverized fuel slurry burner and method of operating same |
| CN2577124Y (en) * | 2002-11-10 | 2003-10-01 | 王姝森 | Bispin five-duct fine coal burner for rotary furnace |
| CN201706487U (en) * | 2010-05-22 | 2011-01-12 | 襄樊大力机电技术有限公司 | Anthracite powdered coal burner for a rotary kiln |
| US8707877B2 (en) * | 2011-06-05 | 2014-04-29 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Solid fuel and oxygen combustion with low NOx and efficient burnout |
| EP3060845A4 (en) * | 2013-10-21 | 2017-07-05 | Hatch Ltd | Velocity control shroud for burner |
| JP2018028418A (en) * | 2016-08-19 | 2018-02-22 | 三菱日立パワーシステムズ株式会社 | Solid fuel burner |
| CN208535970U (en) * | 2018-07-05 | 2019-02-22 | 襄阳市胜合燃力设备有限公司 | A kind of double vortex coal burners of multichannel |
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