CN116949235A - Combustion device - Google Patents

Abstract

The application discloses a combustion device, and belongs to the technical field of blast furnace ironmaking. The combustion apparatus includes: the fuel channel is provided with a fuel inlet and a fuel cavity, and the fuel inlet is communicated with the fuel cavity and is used for introducing fuel into the fuel cavity; the baffle plate channel is arranged at one end of the fuel cavity, which is far away from the fuel inlet, and is obliquely arranged towards the middle part of the fuel channel; the combustion-supporting channel is provided with a combustion-supporting agent inlet and a combustion-supporting cavity, and the combustion-supporting agent inlet and the combustion-supporting agent outlet are both communicated with the combustion-supporting cavity; the mixing channel is provided with a combustion cavity, the fuel channel is communicated with the combustion cavity through the baffle channel, and the combustion-supporting channel is communicated with the combustion cavity, so that fuel and combustion-supporting agent are mixed in the combustion cavity. The baffle channel is obliquely arranged towards the middle of the fuel channel, when fuel enters the combustion chamber through the baffle channel, the outlet of the baffle channel is reduced, so that the fuel and the combustion improver can be uniformly mixed, the condition that a great amount of carbon monoxide is contained in the combusted smoke due to insufficient combustion is reduced, and the harm of the smoke is reduced.

Description

Combustion device

Technical Field

The application belongs to the technical field of blast furnace ironmaking, and particularly relates to a combustion device.

Background

The combustion device has various kinds, one kind is a blast furnace hot blast stove, the blast furnace is provided with high-temperature and stable hot blast in the blast furnace ironmaking process to realize production, and the concentration of CO in flue gas generated by combustion is too high due to the problem of the internal structure of the combustion device, so that the combustion device is disadvantageous to a regenerator and subsequent procedures, and has great harm to the environment.

Disclosure of Invention

The application aims to at least solve the technical problem that the content of carbon monoxide in the flue gas is too high to a certain extent. To this end, the application provides a combustion device.

The embodiment of the application provides a combustion device, which comprises:

a fuel passage having a fuel inlet and a fuel cavity, the fuel inlet in communication with the fuel cavity for introducing fuel into the fuel cavity;

the baffle plate channel is arranged at one end of the fuel cavity, which is far away from the fuel inlet, and is obliquely arranged towards the middle part of the fuel channel;

the combustion-supporting channel is provided with a combustion-supporting agent inlet and a combustion-supporting cavity, and the combustion-supporting agent inlet and the combustion-supporting agent outlet are both communicated with the combustion-supporting cavity;

the mixing channel is provided with a combustion cavity, the fuel channel is communicated with the combustion cavity through the baffle channel, and the combustion-supporting channel is communicated with the combustion cavity, so that the fuel and the combustion-supporting agent are mixed in the combustion cavity.

In this embodiment, baffle passageway sets up to the middle part slope of fuel channel, when the fuel enters into the combustion chamber through baffle passageway, the export of baffle passageway diminishes, make the fuel more concentrate when entering into the combustion chamber, the entering speed reduces, through can increasing the mixing time between fuel and the oxidant that enters into the combustion intracavity, increase the area of contact between fuel and the oxidant, make the misce bene between fuel and the oxidant, reduce the condition that contains a large amount of carbon monoxide in the flue gas after the insufficient messenger burns because of burning, reduce the harm of flue gas.

In an alternative embodiment of the present application, the baffle channel is inclined at an angle of 15 degrees to 75 degrees with respect to the middle portion of the fuel channel.

In an alternative embodiment of the application, the height of the baffle channel is 400 mm-600 mm.

In an alternative embodiment of the present application, the combustion-supporting channel is disposed around the fuel channel, a combustion-supporting baffle is disposed at one end of the combustion-supporting channel away from the combustion-supporting agent inlet, and the combustion-supporting baffle is disposed towards the baffle channel.

In an alternative embodiment of the present application, the combustion-supporting baffle includes a connecting plate and a guide plate that are connected to each other, wherein an end of the connecting plate that is away from the guide plate is connected to the combustion-supporting channel, and an end of the guide plate that is away from the connecting plate is connected to the baffle channel.

In an alternative embodiment of the present application, the number of the combustion-supporting baffles is plural, and the plural combustion-supporting baffles are arranged at intervals.

In an alternative embodiment of the present application, a first baffle plate and a second baffle plate are disposed in the mixing channel, the first baffle plate and the second baffle plate are convexly disposed on the side wall of the combustion chamber, and one end of the first baffle plate, which is far away from the side wall of the combustion chamber, is connected with one end of the second baffle plate, which is far away from the side wall of the combustion chamber.

In an alternative embodiment of the present application, an included angle between the first baffle and the second baffle is 30 degrees to 60 degrees.

In an alternative embodiment of the application, a spoiler is provided in the fuel chamber, the spoiler being arranged close to the fuel inlet.

In an alternative embodiment of the application, the spoiler comprises a support rod and a guide vane, the guide vane being mounted on the support rod, the support rod being arranged in the fuel channel.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a combustion apparatus according to an embodiment of the present application.

Fig. 2 shows an enlarged view of a portion of the combustion apparatus provided by an embodiment of the present application at II in fig. 1.

Fig. 3 is a schematic structural view of a spoiler of a combustion device according to an embodiment of the present application.

Reference numerals: 100-combustion device, 110-fuel channel, 112-fuel inlet, 114-fuel cavity, 120-baffle channel, 130-combustion-supporting channel, 132-combustion-supporting agent inlet, 134-combustion-supporting cavity, 140-mixing channel, 142-combustion cavity, 150-combustion-supporting baffle, 152-connecting plate, 154-guide plate, 160-spoiler, 162-support bar, 164-guide vane.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

The combustion device has various kinds, one kind is a blast furnace hot blast stove, the blast furnace is provided with high-temperature and stable hot blast in the blast furnace ironmaking process to realize production, and the concentration of CO in flue gas generated by combustion is too high due to the problem of the internal structure of the combustion device, so that the combustion device is disadvantageous to a regenerator and subsequent procedures, and has great harm to the environment. The combustion device provided by the application can reduce the content of CO in the combusted smoke and reduce the harm of the smoke.

The application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

referring to fig. 1, fig. 2 and fig. 3 in combination, the present embodiment provides a combustion apparatus 100, where the combustion apparatus 100 provided in the present embodiment can improve the mixing effect between fuel and combustion improver, reduce the content of carbon monoxide in the flue gas after fuel combustion, and reduce the harm of the flue gas.

In the present embodiment, the combustion apparatus 100 includes:

a fuel passage 110 having a fuel inlet 112 and a fuel cavity 114, the fuel inlet 112 in communication with the fuel cavity 114 for introducing fuel into the fuel cavity 114;

a baffle passage 120 provided at one end of the fuel chamber 114 remote from the fuel inlet 112 and inclined toward the middle of the fuel passage 110;

the combustion-supporting channel 130 is provided with a combustion-supporting agent inlet 132 and a combustion-supporting cavity 134, and the combustion-supporting agent inlet 132 and the combustion-supporting agent outlet are both communicated with the combustion-supporting cavity 134;

a mixing passage 140 having a combustion chamber 142, the fuel passage 110 communicating with the combustion chamber 142 through the baffle passage 120, the combustion-supporting passage 130 communicating with the combustion chamber 142, and mixing the fuel and the combustion-supporting agent in the combustion chamber 142.

In this embodiment, the fuel channel 110 is connected to the mixing channel 140 through a baffle plate, and the fuel gas enters the fuel chamber 114 through the baffle plate channel 120 and enters the mixing channel 140, the combustion improver enters the combustion-supporting cavity 134 again and enters the combustion chamber 142 through the combustion-supporting cavity 134, and is mixed with the fuel in the combustion chamber 142, and since the mixing channel 140 has a certain temperature, the fuel will self-ignite after the temperature reaches the ignition point of the fuel, and release heat through combustion.

In this embodiment, the baffle channel 120 is inclined towards the middle of the fuel channel 110, when fuel enters the combustion chamber 142 through the baffle channel 120, the outlet of the baffle channel 120 is smaller, so that the fuel is more concentrated when entering the combustion chamber 142, the entering speed is reduced, the mixing time between the fuel entering the combustion chamber 142 and the combustion improver can be increased, the contact area between the fuel and the combustion improver is increased, the fuel and the combustion improver can be uniformly mixed, the condition that a great amount of carbon monoxide is contained in the combusted flue gas due to insufficient combustion is reduced, and the harm of the flue gas is reduced.

In this embodiment, the fuel is gas, and the combustion improver is air.

In the present embodiment, the baffle passage 120 is inclined at an angle of 15 degrees to 75 degrees toward the middle of the fuel passage 110.

The middle of the fuel channel 110 is a cylinder formed by taking the center of the fuel channel 110 as a circle and one third of the length from the center to the nearest side of the fuel channel 110 as a radius, and is the middle of the fuel channel 110. For example, when the fuel passage 110 is cylindrical, the middle portion of the fuel passage 110 means that a cylinder formed with a radius of one third of the radius of the fuel passage 110 is the middle portion of the fuel passage 110 with the center of the fuel passage 110 as the center. When the fuel passage 110 is rectangular, a center of the fuel passage 110 is a center, and a third of a distance from the center to one of the wide sides is a radius forming cylinder which is a middle part of the fuel passage 110. The same applies when the fuel passage 110 is of other shapes.

If the inclination of the baffle channel 120 is too large, the amount of fuel entering the combustion chamber 142 will be relatively small, the subsequent heat requirement cannot be guaranteed, the multiple inclination cannot be too large, the fuel cannot be more concentrated, the inclination is set between 15 degrees and 75 degrees, the fuel can be more concentrated in the combustion chamber 142 while the amount of the fuel is guaranteed, and the fuel can be fully mixed with the combustion improver.

In this embodiment, the baffle passageway 120 has a height of 400mm to 600mm.

Likewise, if the height of the baffle passageway 120 is too high, the outlet of the baffle passageway 120 may be too small at the same angle of inclination, resulting in a smaller amount of fuel entering the combustion chamber 142, failing to ensure subsequent heat requirements. If the height of the baffle channel 120 is too low, the outlet of the baffle channel 120 is too large under the same inclination angle, and the fuel cannot be concentrated, so that insufficient mixing between the fuel and the combustion improver is caused.

The height of the baffle channel 120 is set to be 400-600 mm, so that the fuel can be more concentrated when entering the combustion chamber 142 while the amount of the fuel is ensured, and the fuel can be fully mixed with the combustion improver.

In the present embodiment, the combustion-supporting channel 130 is disposed around the fuel channel 110, the end of the combustion-supporting channel 130 away from the combustion-supporting agent inlet 132 is provided with a combustion-supporting baffle 150, and the combustion-supporting baffle 150 is disposed towards the baffle channel 120.

The combustion-supporting channel 130 is arranged outside the fuel channel 110 in a surrounding way, so that the combustion improver surrounds the fuel from the outer side of the fuel, the fuel can be fully mixed with the combustion improver, the condition that a great amount of carbon monoxide is contained in the combusted smoke due to insufficient combustion is reduced, and the harm of the smoke is reduced.

In this embodiment, the combustion-supporting baffle 150 is disposed towards the baffle channel 120, so that the combustion improver flowing out of the combustion-supporting cavity 134 can flow along the combustion-supporting baffle 150 to the baffle channel 120 and finally flow along the baffle channel 120 to the fuel, so that the fuel can be fully mixed with the combustion improver, the mixing effect of the fuel and the combustion improver is improved, the content of carbon monoxide in the combusted flue gas is reduced, and the harm of the flue gas is reduced.

In this embodiment, the combustion-supporting baffle 150 includes a connection plate 152 and a guide plate 154 that are connected to each other, an end of the connection plate 152 remote from the guide plate 154 is connected to the combustion-supporting passage 130, and an end of the guide plate 154 remote from the connection plate 152 is connected to the baffle passage 120.

The inclined arrangement of the guide plate 154 toward the baffle channel 120 may be considered that the inclined angle of the guide plate 154 is the same as the inclined angle of the baffle channel 120, so that the combustion improver can quickly flow to the outlet of the baffle channel 120 to be mixed with the fuel flowing out of the baffle channel 120, and the uniformity of mixing between the two is improved.

In this embodiment, the combustion apparatus 100 further includes a nozzle, which is disposed near the combustion-supporting baffle 150, and the combustion improver entering the combustion-supporting cavity 134 can be ejected at a high speed after passing through the nozzle, so as to quickly enter the combustion cavity 142. In other words, the combustion-supporting barrier 150 is mainly provided at the nozzle, and is mainly provided at the front and rear ends of the nozzle. The combustion improver from the nozzle is deflected in the direction of the combustion damper 150 to reduce movement of the fuel into the combustion chamber 142 and thereby allow for adequate combustion.

In the present embodiment, the combustion-supporting baffles 150 are plural, and the plural combustion-supporting baffles 150 are disposed at intervals.

Since the number of the nozzles is plural, two combustion-supporting baffles 150 are provided at each nozzle, and the two combustion-supporting baffles 150 are spaced apart and arranged in parallel. The method can effectively prevent CO from burning in the regenerator, prevent the checker bricks in the regenerator from damaging and falling off, reduce the influence on the environment and be beneficial to improving the temperature of hot air.

In this embodiment, a first baffle and a second baffle are disposed in the combustion chamber, the first baffle and the second baffle are convexly disposed on the side wall of the combustion chamber 142, and one end of the first baffle away from the side wall of the combustion chamber 142 is connected with one end of the second baffle away from the side wall of the combustion chamber 142.

The first baffle and the second baffle are both arranged in the combustion chamber 142 in a protruding mode, because most of the fuel entering the combustion chamber moves along the inner wall in the combustion chamber, the first baffle and the second baffle are arranged in the combustion chamber in a protruding mode to enable the fuel to move along the first baffle and the second baffle, the fuel can move towards the middle of the combustion chamber, the fuel and the combustion improver can be fully mixed, carbon monoxide in the flue gas is further reacted with the part with higher middle oxygen content through turbulent flow of the first baffle and the second baffle, so that the concentration of carbon monoxide at the outlet is reduced, the concentration of oxygen at the outlet is reduced, heat loss is reduced, further reaction of carbon monoxide and oxygen in the flue gas in the combustion chamber is promoted, and the flue gas temperature at the outlet is further improved.

In this embodiment, the included angle between the first baffle and the second baffle is 30 degrees to 60 degrees.

In this embodiment, the first baffle is horizontally parallel to the ground, the included angle between the second baffle and the first baffle is 30-60 degrees, and both the first baffle and the second baffle are intersected with the wall surface of the thermal combustion, the intersection of the two baffles is a chamfer, and the first baffle and the second baffle form a whole with the combustion chamber. The first baffle and the second baffle have the turbulent flow effect on the flue gas after combustion, so that the flue gas at the first baffle and the second baffle at the two ends is further reacted with the oxygen in the middle part again, and the concentration of carbon monoxide at the outlet is reduced.

In the present embodiment, a spoiler 160 is disposed within the fuel cavity 114, with the spoiler 160 disposed proximate to the fuel inlet 112.

When fuel enters the fuel cavity 114 from the fuel inlet 112, the turbulence member 160 can change the flow direction and flow speed of the fuel when entering the combustion chamber through the fuel cavity 114, so that the fuel can fully contact with the combustion improver after entering the combustion chamber, be mixed with the combustion improver, and reduce the content of carbon monoxide at the outlet of the combustion chamber.

In the present embodiment, the spoiler 160 includes a support rod 162 and a guide vane 164, the guide vane 164 is mounted on the support rod 162, and the support rod 162 is disposed in the fuel passage 110.

The number of guide vanes 164 may be plural, and the extending directions of the plurality of guide vanes 164 may be the same or different, and the angles of the guide vanes 164 with respect to the support bar 162 may be the same or different.

In summary, in the combustion apparatus 100 provided in this embodiment, the baffle channel 120 is inclined toward the middle of the fuel channel 110, when fuel enters the combustion chamber 142 through the baffle channel 120, the outlet of the baffle channel 120 is smaller, so that the fuel is more concentrated when entering the combustion chamber 142, the entering speed is reduced, the mixing time between the fuel entering the combustion chamber 142 and the combustion improver is increased, the contact area between the fuel and the combustion improver is increased, the fuel and the combustion improver can be uniformly mixed, the condition that the combusted flue gas contains a large amount of carbon monoxide due to insufficient combustion is reduced, and the hazard of the flue gas is reduced.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Claims (10)

1. A combustion apparatus, characterized in that the combustion apparatus (100) comprises:

a fuel passage (110) having a fuel inlet (112) and a fuel cavity (114), the fuel inlet (112) in communication with the fuel cavity (114) for introducing fuel into the fuel cavity (114);

a baffle passage (120) provided at one end of the fuel chamber (114) away from the fuel inlet (112) and inclined toward the middle of the fuel passage (110);

a combustion-supporting channel (130) provided with a combustion-supporting agent inlet (132) and a combustion-supporting cavity (134), wherein the combustion-supporting agent inlet (132) and the combustion-supporting agent outlet are communicated with the combustion-supporting cavity (134);

-a mixing channel (140) having a combustion chamber (142), said fuel channel (110) being in communication with said combustion chamber (142) through said baffle channel (120), said combustion-supporting channel (130) being in communication with said combustion chamber (142) for mixing said fuel with said combustion-supporting agent in said combustion chamber (142).

2. The combustion device according to claim 1, characterized in that the baffle channel (120) is inclined at an angle of 15-75 degrees with respect to the middle of the fuel channel (110).

3. A combustion device according to claim 1, characterized in that the height of the baffle channel (120) is 400-600 mm.

4. The combustion device according to claim 1, characterized in that the combustion supporting channel (130) is arranged outside the fuel channel (110) in a surrounding manner, a combustion supporting baffle (150) is arranged at one end of the combustion supporting channel (130) away from the combustion supporting agent inlet (132), and the combustion supporting baffle (150) is arranged towards the baffle channel (120).

5. The combustion device according to claim 4, characterized in that the combustion-supporting baffle (150) comprises a connecting plate (152) and a guide plate (154) connected to each other, wherein an end of the connecting plate (152) remote from the guide plate (154) is connected to the combustion-supporting channel (130), and wherein an end of the guide plate (154) remote from the connecting plate (152) is connected to the baffle channel (120).

6. The combustion device according to claim 4, wherein the combustion supporting baffles (150) are plural, and plural combustion supporting baffles (150) are arranged at intervals.

7. The combustion device according to claim 1, wherein a first baffle plate and a second baffle plate are arranged in the mixing channel (140), the first baffle plate and the second baffle plate are convexly arranged on the side wall of the combustion chamber (142), and one end of the first baffle plate, which is far away from the side wall of the combustion chamber (142), is connected with one end of the second baffle plate, which is far away from the side wall of the combustion chamber (142).

8. The combustion apparatus of claim 7 wherein the angle between the first baffle and the second baffle is between 30 degrees and 60 degrees.

9. The combustion device according to claim 1, characterized in that a spoiler (160) is arranged in the fuel chamber (114), which spoiler (160) is arranged close to the fuel inlet (112).

10. The combustion device according to claim 9, characterized in that the spoiler (160) comprises a support rod (162) and a guide vane (164), the guide vane (164) being mounted on the support rod (162), the support rod (162) being arranged within the fuel channel (110).