A combustion device

Abstract

The application discloses a combustion device and belongs to the technical field of blast furnace ironmaking. The combustion device comprises a fuel channel with a fuel inlet and a fuel cavity, the fuel inlet is communicated with the fuel cavity, and the fuel inlet is used for passing fuel into the fuel cavity; a baffle channel is arranged at one end of the fuel cavity away from the fuel inlet and is obliquely arranged towards the middle part of the fuel channel; an auxiliary combustion channel has an auxiliary combustion agent inlet and an auxiliary combustion cavity, the auxiliary combustion agent inlet and the auxiliary combustion agent outlet are communicated with the auxiliary combustion cavity; a mixing channel has a combustion cavity, the fuel channel is communicated with the combustion cavity through the baffle channel, and the auxiliary combustion channel is communicated with the combustion cavity, so that the fuel and the auxiliary combustion agent are mixed in the combustion cavity. The baffle channel is obliquely arranged towards the middle part of the fuel channel, when the fuel passes through the baffle channel and enters the combustion cavity, the outlet of the baffle channel becomes smaller, so that the fuel can be uniformly mixed with the auxiliary combustion agent, the situation that a large amount of carbon monoxide is contained in flue gas after combustion due to insufficient combustion is reduced, and the harm of the flue gas is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of blast furnace ironmaking, and particularly relates to a combustion device. BACKGROUND

[0002] There are many types of combustion devices, one of which is a blast furnace hot blast stove. In the process of blast furnace ironmaking, the blast furnace hot blast stove provides hot blast with high temperature and stability to the blast furnace to realize production. Due to the problem of the internal structure of the combustion device, the concentration of CO in the flue gas generated by combustion is too high, which is not conducive to the heat storage chamber and subsequent processes, and also has great harm to the environment. SUMMARY

[0003] The application aims to at least solve the technical problem of the excessive content of carbon monoxide in flue gas. To this end, the application provides a combustion device.

[0004] The combustion device provided by the application comprises:

[0005] A fuel channel having a fuel inlet and a fuel cavity, the fuel inlet and the fuel cavity being in communication, and being used for passing fuel into the fuel cavity;

[0006] A baffle channel arranged at one end of the fuel cavity away from the fuel inlet and inclined to the middle part of the fuel channel;

[0007] An auxiliary combustion channel having an auxiliary combustion agent inlet and an auxiliary combustion cavity, the auxiliary combustion agent inlet and the auxiliary combustion agent outlet being in communication with the auxiliary combustion cavity;

[0008] A mixing channel having a combustion cavity, the fuel channel being in communication with the combustion cavity through the baffle channel, and the auxiliary combustion channel being in communication with the combustion cavity, so that the fuel and the auxiliary combustion agent are mixed in the combustion cavity.

[0009] In the embodiment, the baffle channel is inclined to the middle part of the fuel channel. When the fuel passes through the baffle channel and enters the combustion cavity, the outlet of the baffle channel becomes smaller, so that the fuel is more concentrated when entering the combustion cavity, the entering speed is reduced, the mixing time between the fuel and the auxiliary combustion agent entering the combustion cavity is increased, the contact area between the fuel and the auxiliary combustion agent is increased, the fuel and the auxiliary combustion agent are uniformly mixed, the case that a large amount of carbon monoxide is contained in the flue gas after combustion due to insufficient combustion is reduced, and the harm of the flue gas is reduced.

[0010] In the optional embodiment of the application, the inclination angle of the baffle channel to the middle part of the fuel channel is 15 degrees to 75 degrees.

[0011] In the optional embodiment of the application, the height of the baffle channel is 400 mm to 600 mm.

[0012] In an optional embodiment of this application, the combustion-supporting channel is arranged around the fuel channel, and a combustion-supporting baffle is provided at the end of the combustion-supporting channel away from the combustion-supporting agent inlet, with the combustion-supporting baffle facing the baffle channel.

[0013] In an optional embodiment of this application, the combustion-supporting baffle includes a connecting plate and a guide plate connected to each other. The end of the connecting plate away from the guide plate is connected to the combustion-supporting channel, and the end of the guide plate away from the connecting plate is connected to the baffle channel.

[0014] In an optional embodiment of this application, there are multiple combustion-supporting baffles, which are spaced apart.

[0015] In an optional embodiment of this application, a first baffle and a second baffle are provided in the mixing channel. The first baffle and the second baffle protrude from the side wall of the combustion chamber. The end of the first baffle away from the side wall of the combustion chamber is connected to the end of the second baffle away from the side wall of the combustion chamber.

[0016] In an optional embodiment of this application, the included angle between the first baffle and the second baffle is 30 degrees to 60 degrees.

[0017] In an optional embodiment of this application, a baffle is provided in the fuel chamber, and the baffle is located near the fuel inlet.

[0018] In an optional embodiment of this application, the agitator includes a support rod and a guide vane, the guide vane being mounted on the support rod, and the support rod being disposed within the fuel passage. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the combustion device provided in an embodiment of this application is shown.

[0021] Figure 2 The combustion device provided in the embodiments of this application is shown in Figure 1 A magnified view of section II in the middle.

[0022] Figure 3 A schematic diagram of the structure of the baffle of the combustion device provided in the embodiments of this application is shown.

[0023] Reference numerals: 100 - combustion device, 110 - fuel passage, 112 - fuel inlet, 114 - fuel cavity, 120 - baffle passage, 130 - combustion-supporting passage, 132 - combustion-supporting agent inlet, 134 - combustion-supporting cavity, 140 - mixing passage, 142 - combustion cavity, 150 - combustion-supporting baffle, 152 - connecting plate, 154 - guide plate, 160 - turbulence member, 162 - support rod, 164 - guide vane. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] It should be noted that all directionality indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directionality indications also change accordingly.

[0026] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0028] Combustion devices have many kinds, one of which is a hot blast stove for blast furnace, which provides hot blast with high temperature and stability to the blast furnace in the process of blast furnace ironmaking to realize production, due to the problem of the internal structure of the combustion device, the concentration of CO in the flue gas generated by combustion is too high, which is harmful to the regenerator and the subsequent process, and also has great harm to the environment. The combustion device provided in the application can reduce the content of CO in the flue gas after combustion and reduce the harm of flue gas.

[0029] The application will be described below in combination with the drawings and with reference to specific embodiments:

[0030] Please refer to Figure 1 , Figure 2 and Figure 3 , the embodiment provides a combustion device 100, the combustion device 100 provided in the embodiment can improve the mixing effect between fuel and combustion-supporting agent, reduce the content of carbon monoxide in the flue gas after fuel combustion, and reduce the harm of flue gas.

[0031] In the embodiment, the combustion device 100 comprises:

[0032] The fuel channel 110 has a fuel inlet 112 and a fuel cavity 114, the fuel inlet 112 is in communication with the fuel cavity 114, and is used for passing fuel into the fuel cavity 114;

[0033] The baffle channel 120 is arranged at one end of the fuel cavity 114 away from the fuel inlet 112 and is arranged obliquely to the middle part of the fuel channel 110;

[0034] The combustion-supporting channel 130 has a combustion-supporting agent inlet 132 and a combustion-supporting cavity 134, the combustion-supporting agent inlet 132 and the combustion-supporting agent outlet are both in communication with the combustion-supporting cavity 134;

[0035] The mixing channel 140 has a combustion cavity 142, the fuel channel 110 is in communication with the combustion cavity 142 through the baffle channel 120, and the combustion-supporting channel 130 is in communication with the combustion cavity 142, so that the fuel and the combustion-supporting agent are mixed in the combustion cavity 142.

[0036] In the embodiment, the fuel channel 110 is connected through the baffle and the mixing channel 140, after the fuel gas enters the fuel cavity 114 chamber and passes through the baffle channel 120, it enters the mixing channel 140, and then the combustion-supporting agent enters the combustion-supporting cavity 134 and passes through the combustion-supporting cavity 134 to enter the combustion cavity 142, and is mixed with the fuel in the combustion cavity 142, since the mixing channel 140 itself has a certain temperature, after the temperature reaches the ignition point of the fuel, the fuel will spontaneously ignite and release heat through combustion.

[0037] In the embodiment, the baffle passage 120 is inclined to the middle part of the fuel passage 110. When the fuel passes through the baffle passage 120 to enter the combustion chamber 142, the outlet of the baffle passage 120 becomes 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 and the combustion-supporting agent entering the combustion chamber 142 is increased, the contact area between the fuel and the combustion-supporting agent is increased, the fuel can be uniformly mixed with the combustion-supporting agent, the situation that a large amount of carbon monoxide is contained in the flue gas after combustion due to insufficient combustion is reduced, and the harm of the flue gas is reduced.

[0038] It should be noted that, in the embodiment, the fuel is coal gas, and the combustion-supporting agent is air.

[0039] In the embodiment, the inclination angle of the baffle passage 120 to the middle part of the fuel passage 110 is 15 degrees to 75 degrees.

[0040] The middle part of the fuel passage 110 refers to a cylinder formed by taking the center of the fuel passage 110 as a circle and taking one-third of the length from the center of the fuel passage 110 to the nearest side as a radius. For example, when the fuel passage 110 is a cylinder, the middle part of the fuel passage 110 refers to a cylinder formed by taking the center of the fuel passage 110 as a circle and taking one-third of the radius of the fuel passage 110 as a radius. When the fuel passage 110 is a rectangle, the center of the fuel passage 110 is taken as a circle, and a cylinder is formed by taking one-third of the distance from the center to one of the wide sides as a radius. When the fuel passage 110 is of other shapes, the same can be deduced.

[0041] If the inclination angle of the baffle passage 120 is too large, the amount of fuel entering the combustion chamber 142 will be relatively small, which cannot guarantee the subsequent heat demand. If the inclination angle is too large, the fuel cannot be more concentrated. The inclination angle is set to be 15 degrees to 75 degrees, which can make the fuel more concentrated when entering the combustion chamber 142, and the fuel can be fully mixed with the combustion-supporting agent.

[0042] In the embodiment, the height of the baffle passage 120 is 400 mm to 600 mm.

[0043] Similarly, if the height of the baffle passage 120 is too high, the outlet of the baffle passage 120 will be too small under the same inclination angle, so that the amount of fuel entering the combustion chamber 142 is small, which cannot guarantee the subsequent heat demand. If the height of the baffle passage 120 is too low, the outlet of the baffle passage 120 will be too large under the same inclination angle, so that the fuel cannot be more concentrated, and the fuel and the combustion-supporting agent cannot be fully mixed.

[0044] The height of the baffle passage 120 is set between 400mm and 600mm, which can make the fuel more concentrated when entering the combustion chamber 142, and make the fuel fully mixed with the combustion-supporting agent.

[0045] In the embodiment, the combustion-supporting passage 130 is arranged outside the fuel passage 110, and the combustion-supporting passage 130 is provided with a combustion-supporting baffle 150 at the end far from the combustion-supporting agent inlet 132, and the combustion-supporting baffle 150 is arranged towards the baffle passage 120.

[0046] The combustion-supporting passage 130 is arranged outside the fuel passage 110, which can make the combustion-supporting agent surround the fuel from the outside of the fuel, and make the fuel fully mixed with the combustion-supporting agent, and reduce the situation that the combustion-supporting agent is not fully mixed with the fuel, and reduce the harm of the smoke.

[0047] In the embodiment, the combustion-supporting baffle 150 is arranged towards the baffle passage 120, which can make the combustion-supporting agent flowing out of the combustion-supporting chamber 134 flow along the combustion-supporting baffle 150 to the baffle passage 120, and then flow along the baffle passage 120, and finally flow to the fuel, so as to make the fuel fully mixed with the combustion-supporting agent, improve the mixing effect of the fuel and the combustion-supporting agent, and reduce the content of carbon monoxide in the smoke, and reduce the harm of the smoke.

[0048] In the embodiment, the combustion-supporting baffle 150 comprises a connecting plate 152 and a guide plate 154 connected with each other, the connecting plate 152 is connected with the combustion-supporting passage 130 at the end far from the guide plate 154, and the guide plate 154 is connected with the baffle passage 120 at the end far from the connecting plate 152.

[0049] The guide plate 154 is arranged obliquely towards the baffle passage 120, and the inclination angle of the guide plate 154 can be considered to be the same as the inclination angle of the baffle passage 120, which can make the combustion-supporting agent quickly flow to the outlet of the baffle passage 120, and mix with the fuel flowing out of the baffle passage 120, and improve the uniformity of the mixture.

[0050] In the embodiment, the combustion device 100 further comprises a nozzle, and the nozzle is arranged close to the combustion-supporting baffle 150, and the combustion-supporting agent entering the combustion-supporting chamber 134 can be sprayed at high speed through the nozzle, and then quickly enter the combustion chamber 142. In other words, the combustion-supporting baffle 150 is mainly arranged at the nozzle, and is mainly arranged at the front end and the end of the nozzle. The combustion-supporting agent sprayed out of the nozzle is deviated according to the direction of the combustion-supporting baffle 150, which can reduce the movement of the fuel after entering the combustion chamber 142, so as to make the fuel fully burn.

[0051] In the embodiment, the combustion-supporting baffle 150 is a plurality of combustion-supporting baffles 150, and the plurality of combustion-supporting baffles 150 are arranged at intervals.

[0052] Since the number of nozzles is multiple, two combustion-supporting baffles 150 are arranged at each nozzle, and the two combustion-supporting baffles 150 are spaced and arranged in parallel. CO can be effectively prevented from burning in the regenerator, the checker bricks in the regenerator can be prevented from being damaged and falling off, the impact on the environment can be reduced, and the hot air temperature can be improved.

[0053] In the embodiment, the first baffle and the second baffle are arranged in the combustion chamber, the first baffle and the second baffle are protruded on the side wall of the combustion cavity 142, and one end of the first baffle away from the side wall of the combustion cavity 142 is connected with one end of the second baffle away from the side wall of the combustion cavity 142.

[0054] The first baffle and the second baffle are both protruded in the combustion cavity 142. Since the fuel entering the combustion chamber mostly moves along the inner wall in the combustion chamber, the protrusion of the first baffle and the second baffle in the combustion chamber can make the fuel move along the first baffle and the second baffle, so that the fuel can move to the middle part of the combustion chamber, and the fuel and the combustion-supporting agent can be more fully mixed. The first baffle and the second baffle can disturb the flow of the flue gas, so that the carbon monoxide in the flue gas reacts further with the part with a relatively high oxygen content in the middle, so as to reduce the concentration of carbon monoxide at the outlet, reduce the concentration of oxygen at the outlet, reduce the loss of heat, promote the further reaction of carbon monoxide and oxygen in the flue gas in the combustion chamber, and further improve the temperature of the flue gas at the outlet.

[0055] In the embodiment, the included angle between the first baffle and the second baffle is 30 degrees to 60 degrees.

[0056] In the embodiment, the first baffle is horizontally parallel to the ground, the included angle between the first baffle and the second baffle is 30 degrees to 60 degrees, and the first baffle and the second baffle both intersect with the hot combustion wall. The intersection of the two baffles is chamfered, and the first baffle and the second baffle form an integral whole with the combustion chamber. The first baffle and the second baffle disturb the flow of the flue gas after combustion, so that the flue gas at the two ends of the first baffle and the second baffle reacts further with the oxygen in the middle part, and the concentration of carbon monoxide at the outlet is reduced.

[0057] In the embodiment, the fuel cavity 114 is provided with a flow disturbing piece 160, and the flow disturbing piece 160 is arranged close to the fuel inlet 112.

[0058] When the fuel enters the fuel cavity 114 from the fuel inlet 112 and then enters the combustion chamber through the fuel cavity 114, the flow disturbing piece 160 can change the flow direction and flow speed of the fuel, so that the fuel can fully contact and mix with the combustion-supporting agent after entering the combustion chamber, and the content of carbon monoxide at the outlet of the combustion chamber is reduced.

[0059] In the embodiment, the spoiler 160 comprises a support rod 162 and guide vanes 164, the guide vanes 164 are installed on the support rod 162, and the support rod 162 is arranged in the fuel passage 110.

[0060] The guide vanes 164 are multiple, the extension directions of the multiple guide vanes 164 can be same or different, and the angles of the guide vanes 164 relative to the support rod 162 can be same or different.

[0061] In summary, the combustion device 100 provided by the embodiment, in the embodiment, the baffle passage 120 is obliquely arranged to the middle part of the fuel passage 110, when the fuel passes through the baffle passage 120 and enters the combustion chamber 142, the outlet of the baffle passage 120 becomes smaller, so that the fuel is more concentrated when entering the combustion chamber 142, and the entering speed is reduced. By increasing the mixing time between the fuel and the combustion-supporting agent in the combustion chamber 142, increasing the contact area between the fuel and the combustion-supporting agent, the fuel can be uniformly mixed with the combustion-supporting agent, reducing the situation that a large amount of carbon monoxide is contained in the flue gas after combustion due to insufficient combustion, and reducing the harm of the flue gas.

[0062] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

Claims

1. A combustion device, characterized in that, The combustion device (100) includes: The fuel passage (110) has a fuel inlet (112) and a fuel chamber (114), the fuel inlet (112) and the fuel chamber (114) being in communication for introducing fuel into the fuel chamber (114); A baffle channel (120) is provided at one end of the fuel chamber (114) away from the fuel inlet (112) and is inclined toward the middle of the fuel channel (110); The combustion-supporting channel (130) has a combustion-supporting agent inlet (132) and a combustion-supporting chamber (134), wherein the combustion-supporting agent inlet (132) and the combustion-supporting agent outlet are both connected to the combustion-supporting chamber (134); A mixing channel (140) has a combustion chamber (142), the fuel channel (110) is connected to the combustion chamber (142) through the baffle channel (120), and the combustion-supporting channel (130) is connected to the combustion chamber (142) so that the fuel and the combustion-supporting agent are mixed in the combustion chamber (142); The combustion-supporting channel (130) is arranged around the fuel channel (110). A combustion-supporting baffle (150) is provided at the end of the combustion-supporting channel (130) away from the combustion-supporting agent inlet (132). The combustion-supporting baffle (150) is positioned towards the baffle channel (120). The combustion-supporting baffle (150) includes a connecting plate (152) and a guide plate (154) connected to each other. The end of the connecting plate (152) away from the guide plate (154) is connected to the combustion-supporting agent inlet (132). The combustion channel (130) is connected, and the end of the guide plate (154) away from the connecting plate (152) is connected to the baffle channel (120). The guide plate (154) is inclined towards the baffle channel (120), and the inclination angle of the guide plate (154) is the same as that of the baffle channel (120). The combustion aid flowing out of the combustion chamber (134) can flow along the combustion baffle (150) to the outlet of the baffle channel (120). There are multiple combustion-supporting baffles (150), which are spaced apart. The combustion device also includes a nozzle, which is located near the combustion-supporting baffles (150). Two combustion-supporting baffles (150) are provided at each nozzle, and the two combustion-supporting baffles (150) are spaced apart and arranged in parallel.

2. The combustion device according to claim 1, characterized in that, The inclination angle of the baffle channel (120) relative to the middle of the fuel channel (110) is 15 degrees to 75 degrees.

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

4. The combustion device according to claim 1, characterized in that, The mixing channel (140) is provided with a first baffle and a second baffle, which protrude from the side wall of the combustion chamber (142). The end of the first baffle away from the side wall of the combustion chamber (142) is connected to the end of the second baffle away from the side wall of the combustion chamber (142).

5. The combustion device according to claim 4, characterized in that, The included angle between the first baffle and the second baffle is 30 degrees to 60 degrees.

6. The combustion device according to claim 1, characterized in that, A baffle (160) is provided inside the fuel chamber (114), and the baffle (160) is located near the fuel inlet (112).

7. The combustion device according to claim 6, characterized in that, The turbulence-disrupting component (160) includes a support rod (162) and a guide vane (164), the guide vane (164) being mounted on the support rod (162), and the support rod (162) being disposed within the fuel passage (110).

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