Combustion device and combustion operation method

Abstract

The invention provides a combustion device and a combustion operation method, and relates to the technical field of combustors, and the combustion device comprises a first shell, a movable assembly and a second shell. A first output part is arranged at the end of the first shell, and the sectional area of the first output part is gradually reduced in the direction of the end of the first shell. The movable assembly penetrates through the first shell, and a first flow channel is defined by the movable assembly and the first shell so that the sectional area of the outlet end of the first flow channel can be gradually changed. A second output part is arranged at the end part of the second shell, and the sectional area of the second output part is gradually reduced towards the end part direction of the second shell, so that the sectional area of the outlet end part of the second flow channel is gradually changed. According to the combustion device, the first flow channel and the second flow channel are independently operated and controlled, the situation of mutual interference is avoided, continuous and uniform change and control are achieved, the situation that due to the fact that the sectional area of the fuel outlet drastically changes, combustion flames blow-off occurs is reduced, and the stability of the flame form is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and more particularly, to a combustion device and a combustion operation method. Background Art

[0002] Burners achieve efficient combustion of fuel by controlling the ratio of air to fuel, and are widely used in various energy demand fields such as power generation, heating, transportation, etc. Existing burners adjust the combustion load of the burner by changing the fuel supply rate (for example, increasing or decreasing the firepower). There is a situation where the fuel outlet rate of the burner changes too much, resulting in flameout of the burner, which affects the combustion stability. Summary of the Invention

[0003] The purpose of the present invention is to provide a combustion device, in which the cross-sections of the first flow channel and the second flow channel can be independently operated and controlled, so as to continuously and uniformly change and control the mixed fuel ratio of multiple flow channels, reduce the non-linear change of fuel mixing adjustment, resulting in flameout of the combustion flame, and ensure the stability of the flame shape.

[0004] The first aspect of the present invention provides a combustion device, which includes:

[0005] A first housing, with a first output part provided at an end of the first housing, and the cross-sectional area of the first output part gradually decreasing in the direction towards the end of the first housing;

[0006] A movable component, which is disposed through the first housing, and the movable component can reciprocate relative to the first housing along a first direction. The movable component and the first housing define a first flow channel, and the first direction is the length direction of the combustion device, so that the cross-sectional area of the outlet end of the first flow channel gradually changes;

[0007] A second housing, which is sleeved on the first housing and defines a second flow channel with the first housing. A second output part is provided at an end of the second housing, and the cross-sectional area of the second output part gradually decreases in the direction towards the end of the second housing. The second output part is provided corresponding to the first output part, and the second housing can reciprocate relative to the first housing along the first direction, so that the cross-sectional area of the outlet end of the second flow channel gradually changes.

[0008] In a possible embodiment of the present invention, the movable component includes a movable rod, a first transmission member, and a first driving member, and the first driving member drives the movable rod to move relatively along the first direction through the first transmission member.

[0009] In a possible embodiment of the present invention, a third adjustment portion is provided at one end of the movable rod close to the first output portion, and the cross-sectional area of the third adjustment portion gradually decreases toward the end portion of the first housing.

[0010] In a possible embodiment of the present invention, the combustion device further includes a second transmission member and a second driving member, and the second driving member drives the first housing to move relative to each other in the first direction through the second transmission member.

[0011] In a possible embodiment of the present invention, both the first output portion and the second output portion are conical structures.

[0012] In a possible embodiment of the present invention, the combustion device has at least a first position. When the combustion device is in the first position, the outlet end of the first flow channel and the outlet end of the second flow channel are located in the same plane.

[0013] In a possible embodiment of the present invention, the combustion device has a second position. When the combustion device is in the second position, the movable assembly closes the outlet end of the first flow channel, and the second housing abuts against the first housing and closes the outlet end of the second flow channel.

[0014] The second aspect of the present invention provides a combustion operation method, which applies the combustion device described in any one of the above embodiments. The combustion operation method includes:

[0015] S100: Obtain the fuel rate of the first flow channel and the fuel rate of the second flow channel;

[0016] S200: Gradually adjust the cross-sectional area of the outlet end of the first flow channel according to the change in the fuel flow rate of the first flow channel;

[0017] S300: And / or, gradually adjust the cross-sectional area of the outlet end of the second flow channel according to the change in the fuel flow rate of the second flow channel.

[0018] In a possible embodiment of the present invention, when the fuel rate of the first flow channel increases, move the movable assembly toward the end portion close to the first housing to gradually reduce the cross-sectional area of the outlet end of the first flow channel; or when the fuel rate of the first flow channel decreases, move the movable assembly toward the end portion away from the first housing to gradually increase the cross-sectional area of the outlet end of the first flow channel.

[0019] In a possible embodiment of the present invention, when the fuel rate in the second flow channel increases, the first housing is moved towards the end close to the second housing, so that the cross-sectional area of the outlet end of the second flow channel gradually decreases; or when the fuel rate in the second flow channel decreases, the first housing is moved towards the end away from the second housing, so that the cross-sectional area of the outlet end of the second flow channel gradually increases.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: A combustion device provided by the present invention, the first housing, the second housing and the movable component in the combustion device cooperate to respectively define a first flow channel and a second flow channel. The first housing and the movable component reciprocate along a first direction to adjust the cross-sectional area of the outlet end of the first flow channel, so that the cross-sectional area of the outlet end of the first flow channel gradually increases or gradually decreases. The second housing and the first housing move relative to each other to adjust the cross-sectional area of the outlet end of the second flow channel, so that the cross-sectional area of the outlet end of the second flow channel gradually increases or gradually decreases. The first flow channel and the second flow channel are independently operated and controlled, and there will be no mutual interference. The cross-sectional areas of the outlets of the multi-channel mixed fuel change continuously and uniformly, reducing the situation of flame blowout caused by a sharp change in the cross-sectional area of the fuel outlet, ensuring the stability of the flame shape, maintaining a high combustion efficiency, and further improving the combustion stability of the combustion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a combustion device provided in some embodiments of the present invention;

[0023] Figure 2 It is a side view structural schematic diagram of a combustion device provided in some embodiments of the present invention;

[0024] Figure 3 It is a sectional structural schematic diagram of a combustion device provided in some embodiments of the present invention;

[0025] Figure 4 It is a sectional structural schematic diagram of a combustion device provided in some embodiments of the present invention Figure 1 ;

[0026] Figure 5 It is a sectional structural schematic diagram of a combustion device provided in some embodiments of the present invention Figure 2 ;

[0027] Figure 6 Schematic flow diagram of the combustion operation method provided in some embodiments of the present invention.

[0028] Description of main component symbols;

[0029] 100 - Combustion device; 110 - First housing; 111 - First output part; 112 - Second transmission member; 120 - Movable assembly; 121 - Movable rod; 122 - First transmission member; 124 - Third adjustment part; 130 - Second housing; 140 - First flow channel; 150 - Second flow channel; X - First direction. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0034] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0037] Refer to Figure 1 As shown, an embodiment of the present application provides a combustion device 100, which includes a first housing 110, a movable component 120, and a second housing 130.

[0038] Specifically, with reference to Figure 2 and Figure 3 As shown, a first output portion 111 is provided at an end of the first housing 110, and the cross-sectional area of the first output portion 111 gradually decreases in the direction toward the end of the first housing 110. The movable component 120 is disposed through the first housing 110, and the movable component 120 can reciprocate relative to the first housing 110 along a first direction X. The movable component 120 and the first housing 110 define a first flow channel 140. The first direction X is the length direction of the combustion device 100, so that the cross-sectional area of the outlet end of the first flow channel 140 gradually changes. The first housing 110 and the movable component 120 reciprocate along the first direction X to adjust the cross-sectional area of the outlet end of the first flow channel 140, so that the cross-sectional area of the outlet end of the first flow channel 140 gradually increases or gradually decreases.

[0039] In this embodiment, the second housing 130 is sleeved on the first housing 110 and defines a second flow channel 150 with the first housing 110. A second output portion is provided at an end of the second housing 130, and the cross-sectional area of the second output portion gradually decreases in the direction towards the end of the second housing 130. The second output portion is arranged corresponding to the first output portion 111, and the second housing 130 can reciprocate relative to the first housing 110 along the first direction X, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually changes. Correspondingly, the first housing 110, the second housing 130 and the movable assembly 120 in the combustion device 100 cooperate to respectively define a first flow channel 140 and a second flow channel 150. The second housing 130 moves relative to the first housing 110 to adjust the cross-sectional area of the outlet end of the second flow channel 150, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually increases or gradually decreases. The first flow channel 140 and the second flow channel 150 are independently operated and controlled and adjusted, and there will be no interference between the two flow channels. Since the cross-sectional areas of the first flow channel 140 and the second flow channel 150 change continuously and uniformly during the adjustment process, the cross-sectional area of the outlet of the mixed fuel of the multi-flow channels changes continuously and uniformly, reducing the situation of flame blowout caused by the sharp change of the cross-sectional area of the fuel outlet, ensuring the stability of the flame shape, and maintaining a high combustion efficiency.

[0040] It can be understood that blowout refers to the phenomenon that the flame is blown away from the burner nozzle due to too high air flow velocity and cannot maintain stable combustion. Once the flame leaves the burner, it cannot be re-ignited, resulting in flameout. When the first flow channel 140 and the second flow channel 150 of the present application are mixed and burned, it is convenient to continuously and uniformly adjust the fuel flow rates at the outlet ends of the first flow channel 140 and the second flow channel 150, ensuring a stable combustion environment.

[0041] Among them, the first flow channel 140 and the second flow channel 150 of the present application are used for the circulation and transportation of fuel. The first flow channel 140 and the second flow channel 150 can respectively transport different types of fuel, so that the fuel is output at the position of the outlet end of the first flow channel 140 or the second flow channel 150. The fuel in the first flow channel 140 and the second flow channel 150 is mixed to form a flame for combustion. The fuel in the first flow channel 140 and the second flow channel 150 can be gaseous fuel, such as natural gas, liquefied petroleum gas, etc. Of course, the fuel in the first flow channel 140 and the second flow channel 150 can also be liquid fuel, such as diesel oil, heavy oil, biodiesel, which will not be elaborated here.

[0042] In addition, one of the first flow channel 140 and the second flow channel 150 is used for the circulation and transportation of fuel, and the other of the first flow channel 140 and the second flow channel 150 is used for the transportation of the combustion-supporting agent. The combustion-supporting agent can be air or oxygen. Separating the fuel and the combustion-supporting agent reduces the explosion risk during the transportation of the fuel, improves the safety performance, and enables the fuel and the combustion-supporting agent to be mixed and output at the outlet position. A shear layer is formed at the nozzle outlet by means of a velocity difference, thereby improving the mixing efficiency.

[0043] When the cross-sectional areas of the outlet ends of the first flow channel 140 and the second flow channel 150 gradually change, it will affect the mixing degree of the fuel and air and the passing rate of the fuel, making the fuel flow continuity at the outlet ends of the first flow channel 140 and the second flow channel 150 change uniformly, preventing the cross-sectional area change from causing a drastic change in the fuel flow and resulting in an unstable combustion flame, and avoiding affecting the combustion stability. In addition, the number of flow channels of the combustion device 100 is not limited to this. The combustion device 100 can also be provided with a third flow channel, a fourth flow channel, etc., and the transportation and mixing of the fuel are realized through multiple flow channels.

[0044] It should be noted that, as Figure 2 and Figure 3 shown, the combustion device 100 has a first direction X. Exemplarily, taking the length direction of the combustion device 100 as an example for the first direction X, the length directions of the first housing 110 and the second housing 130 are both the first direction X. It can be understood that the above definitions are only for facilitating the understanding of the relative position relationship of each part in the combustion device 100 and should not be construed as a limitation to the present application.

[0045] In one embodiment, referring to Figure 2 shown, optionally, the movable assembly 120 includes a movable rod 121, a first transmission member 122, and a first driving member. The first driving member drives the movable rod 121 to move relative to the first direction X through the first transmission member 122, that is, the first driving member drives the movable rod 121 to move along the length direction of the combustion device 100 through the first transmission member 122. Since the cross-sectional area of the first output portion 111 at the end direction of the first housing 110 gradually decreases, when the movable rod 121 moves relatively, it can make the cross-sectional area of the outlet end of the first flow channel 140 defined by the movable rod 121 and the first housing 110 gradually change, so as to gradually change the fuel flow at the outlet end of the first flow channel 140, prevent the cross-sectional area change from causing a drastic change in the fuel flow and resulting in an unstable combustion flame, and ensure the combustion stability.

[0046] On the basis of any of the above embodiments, optionally, in combination with Figure 2 and Figure 3As shown, both the first output part 111 and the second output part are conical structures, enabling the fuel to pass through a fuel passage with a continuously uniform change, avoiding a drastic change in the air flow when the fuel passes through the outlet end.

[0047] In summary, in the combustion device 100, the first housing 110, the second housing 130, and the movable component 120 cooperate to respectively define a first flow channel 140 and a second flow channel 150. The first housing 110 and the movable component 120 reciprocate along the first direction X to adjust the cross-sectional area of the outlet end of the first flow channel 140, so that the cross-sectional area of the outlet end of the first flow channel 140 gradually increases or gradually decreases. The second housing 130 moves relative to the first housing 110 to adjust the cross-sectional area of the outlet end of the second flow channel 150, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually increases or gradually decreases. The first flow channel 140 and the second flow channel 150 are independently operated and controlled without interference with each other. The cross-sectional area of the outlet of the multi-channel mixed fuel changes continuously and uniformly, reducing the occurrence of flame detachment when the cross-sectional area of the fuel outlet changes drastically, ensuring the stability of the flame shape, maintaining a high combustion efficiency, and further improving the combustion stability of the combustion device 100.

[0048] Reference Figures 1 to 3 As shown, an embodiment of the present application provides another combustion device 100, which includes a first housing 110, a movable component 120, and a second housing 130.

[0049] Specifically, in combination with Figure 2 and Figure 3As shown, a first output portion 111 is provided at an end of the first housing 110, and a cross-sectional area of the first output portion 111 gradually decreases in a direction toward the end of the first housing 110. The movable assembly 120 is disposed through the first housing 110, and the movable assembly 120 can reciprocate relative to the first housing 110 along a first direction X, and the movable assembly 120 and the first housing 110 define a first flow channel 140. The first direction X is a length direction of the combustion device 100, so that a cross-sectional area of an outlet end of the first flow channel 140 gradually changes. The second housing 130 is sleeved on the first housing 110 and defines a second flow channel 150 with the first housing 110. A second output portion is provided at an end of the second housing 130, and a cross-sectional area of the second output portion gradually decreases in a direction toward the end of the second housing 130. The second output portion is provided corresponding to the first output portion 111, and the second housing 130 can reciprocate relative to the first housing 110 along the first direction X, so that a cross-sectional area of an outlet end of the second flow channel 150 gradually changes. Correspondingly, the first housing 110, the second housing 130, and the movable assembly 120 in the combustion device 100 cooperate to respectively define the first flow channel 140 and the second flow channel 150. The first housing 110 and the movable assembly 120 reciprocate along the first direction X to adjust a cross-sectional area of an outlet end of the first flow channel 140, so that the cross-sectional area of the outlet end of the first flow channel 140 gradually increases or gradually decreases. The second housing 130 and the first housing 110 move relative to each other to adjust a cross-sectional area of an outlet end of the second flow channel 150, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually increases or gradually decreases. The first flow channel 140 and the second flow channel 150 are independently operated and controlled and adjusted, and there will be no situation where the two flow channels interfere with each other. Since the cross-sectional areas of the first flow channel 140 and the second flow channel 150 change continuously and uniformly during the adjustment process, the cross-sectional area of the outlet of the multi-channel mixed fuel changes continuously and uniformly, reducing the situation of flame blowout caused by a sharp change in the cross-sectional area of the fuel outlet, ensuring the stability of the flame shape, and maintaining a high combustion efficiency.

[0050] In one embodiment, referring to Figure 2 and Figure 4As shown, optionally, the movable component 120 includes a movable rod 121, a first transmission member 122, and a first driving member. The first driving member drives the movable rod 121 to move relatively in the first direction X through the first transmission member 122, that is, along the length direction of the combustion device 100, the first driving member drives the movable rod 121 to move through the first transmission member 122. Since the cross-sectional area of the first output portion 111 at the end of the first housing 110 gradually decreases, when the movable rod 121 moves relatively, it can make the cross-sectional area of the outlet end of the first flow channel 140 defined by the movable rod 121 and the first housing 110 change gradually, so as to gradually change the fuel flow rate at the outlet end of the first flow channel 140, prevent the situation that the sudden change of the cross-sectional area causes a sharp change in the fuel flow rate and results in unstable combustion flame, and ensure the stability of combustion. Exemplarily, the first transmission member 122 is a first gear, the first gear is in transmission connection with the movable rod 121, and the first gear drives the movable rod 121 to move relatively through a transmission manner, so that the cross-sectional area of the outlet end of the first flow channel 140 defined by the movable rod 121 changes continuously, reducing the influence on the stability of the combustion flame.

[0051] Optionally, as shown in Figures 3 to 5 As shown, a third adjustment portion 124 is provided at one end of the movable rod 121 close to the first output portion 111, and the cross-sectional area of the third adjustment portion 124 gradually decreases towards the end of the first housing 110. Since the cross-sectional area of the third adjustment portion 124 gradually decreases, when the third adjustment portion 124 moves, it can change the cross-sectional area of the outlet end of the first flow channel 140. The third adjustment portion 124 of the movable rod 121 and the first output portion 111 of the first housing 110 jointly define the outlet end of the first flow channel 140, so as to change the cross-sectional area of the outlet end of the first flow channel 140, and make the cross-sectional area of the outlet end of the first flow channel 140 change continuously, preventing the situation that the sudden change of the cross-sectional area of the outlet end of the first flow channel 140 affects the combustion stability. Exemplarily, the third adjustment portion 124 is a spindle-shaped structure.

[0052] For example, the cross-sectional diameter of the third adjustment portion is Q1, the relative moving distance between the movable rod 121 and the first housing 110 is D1, and the outlet cross-sectional area ratio refers to the ratio of the real-time cross-sectional area of the outlet end of the first flow channel 140 to the maximum cross-sectional area of the outlet of the first flow channel 140. The continuous and uniform change adjustment of the cross-sectional area of the outlet end of the first flow channel 140 is realized through the relative moving distance D1 between the movable rod 121 and the first housing 110. The specific adjustment data table 1 is as follows:

[0053] Adjustment Data Table 1

[0054]

[0055] It can be seen from the adjustment data table 1 that at this time, the relative movement distance between the movable rod 121 and the first shell 110 can achieve a 10% change in the outlet cross-sectional area ratio for every 5 mm movement. The cross-sectional area of ​​the outlet end of the first flow channel 140 can be adjusted to achieve continuous and uniform changes. The adjustment range of the outlet cross-sectional area ratio can meet the range between 0 and 100%.

[0056] In one embodiment, reference Figure 2 As shown, optionally, the combustion device 100 further includes a second transmission member 112 and a second driving member, and the second driving member drives the first housing 110 to move relative to each other along the first direction X through the second transmission member 112. In other words, the second driving member can drive the first housing 110 to move relative to each other along the length direction of the combustion device 100, so that the relative position of the first housing 110 and the second housing 130 can be changed. Since the cross-sectional area of ​​the second output portion of the second housing 130 gradually decreases, the cross-sectional area of ​​the outlet end of the second flow channel 150 gradually increases or decreases, ensuring that the cross-sectional area of ​​the outlet end of the second flow channel 150 changes continuously and evenly, thereby ensuring the stability of combustion. Exemplarily, the second transmission member 112 is a second gear, which is transmission-connected to the first housing 110, and the transmission function of the second gear is substantially the same as that of the first gear, which will not be described in detail here.

[0057] For example, the cross-sectional diameter of the second output portion is Q2, and the relative moving distance between the second shell 130 and the first shell 110 is D2. The outlet cross-sectional area ratio here refers to the ratio of the real-time cross-sectional area of ​​the outlet end of the second flow channel 150 to the maximum outlet cross-sectional area of ​​the second flow channel 150. The continuous uniform change adjustment of the cross-sectional area of ​​the outlet end of the second flow channel 150 is achieved by the relative moving distance D2 between the second shell 130 and the first shell 110. The specific adjustment data table 2 is as follows:

[0058] Adjustment data table 2

[0059]

[0060] It can be seen from adjustment data table 2 that at this time, the relative movement distance between the second shell 130 and the first shell 110 can achieve a 10% change in the outlet cross-sectional area ratio for every 3 mm movement. The cross-sectional area of ​​the outlet end of the second flow channel 150 can be adjusted to achieve continuous and uniform changes, and the adjustment range of the outlet cross-sectional area ratio can meet the range between 0 and 100%.

[0061] Based on any one of the above embodiments, optionally, in combination with Figure 2 and Figure 3As shown, both the first output part 111 and the second output part are conical structures, enabling fuel to pass through a fuel passage with a continuously and uniformly changing cross-section, thereby avoiding a drastic change in the air flow when the fuel passes through the outlet end. Exemplarily, the first housing 110 and the second housing 130 are cylindrical structures. The conical first output part 111 defines the cross-sectional area of the first flow channel 140, and the conical second output part defines the cross-sectional area of the second flow channel 150.

[0062] In one embodiment, referring to Figure 2 As shown, optionally, the combustion device 100 has at least a first position. When the combustion device 100 is in the first position, the outlet ends of the first flow channel 140 and the second flow channel 150 are located in the same plane. Correspondingly, when the combustion device 100 is in the first position, the outlet end of the first flow channel 140 corresponds to the outlet end of the second flow channel 150, so as to facilitate the mixing and combustion of the fuel in the first flow channel 140 and the fuel in the second flow channel 150 at the outlet position, reducing the situation where the fuel in the first flow channel 140 and the fuel in the second flow channel 150 do not fully contact and mix, and improving the combustion effect of the combustion device 100.

[0063] Optionally, as Figure 3 As shown, the combustion device 100 has a second position. When the combustion device 100 is in the second position, the movable component 120 closes the outlet end of the first flow channel 140, and the second housing 130 abuts against the first housing 110 and closes the outlet end of the second flow channel 150. That is, when the combustion device 100 is in the second position, the movable component 120 and the first housing 110 can jointly close the outlet end of the first flow channel 140, and the second housing 130 can close the outlet end of the second flow channel 150. At this time, the fuel output of the combustion device 100 can be closed. It can be understood that since the movable component 120 and the first housing 110 move independently, independent control of the outlet ends of the first flow channel 140 and the second flow channel 150 can be achieved, and the output or closing of the outlet end of the first flow channel 140 and / or the output or closing of the outlet end of the second flow channel 150 can be adjusted according to the combustion condition of the combustion device 100. That is, in one case, the output or closing of the fuel at the outlet end of the first flow channel 140 or the output or closing of the fuel at the outlet end of the second flow channel 150 is controlled, and in another case, the output or closing of the fuel at the outlet end of the first flow channel 140 is controlled while the output or closing of the fuel at the outlet end of the second flow channel 150 is controlled.

[0064] An embodiment of the present invention also provides a combustion operation method, which applies the combustion device 100 described in any one of the above embodiments. Referring to Figure 6 As shown, the steps of the combustion operation method include:

[0065] Step S100: Obtain the fuel flow rate of the first flow channel 140 and the fuel flow rate of the second flow channel 150. Sensors or other measuring devices can be set to monitor the fuel flow rate in real time.

[0066] Exemplarily, obtain preset monitoring parameters, and compare the preset monitoring parameters with the real-time monitoring parameters. The preset monitoring parameters include a preset flame morphology image, a preset combustion temperature, a preset pressure, etc. The preset flame morphology image refers to the flame length, flame shape, and flame color, so as to reflect whether the combustion device 100 achieves sufficient combustion.

[0067] Step S200: Gradually adjust the cross-sectional area of the outlet end of the first flow channel 140 according to the change in the fuel flow rate of the first flow channel 140. Gradually adjust the cross-sectional area of the outlet end of the first flow channel 140 according to the change in the fuel flow rate of the first flow channel 140, so that the cross-sectional area of the outlet end of the first flow channel 140 changes continuously and uniformly. Use a control system to gradually adjust the cross-sectional area of the outlet end of the flow channel to achieve continuous and uniform change of the cross-sectional area, and reduce the occurrence of flame blowout when the cross-sectional area changes non-linearly.

[0068] Exemplarily, compare the real-time flame morphology with the preset flame morphology image, and use a control system to gradually adjust the cross-sectional area of the outlet end of the flow channel to adjust the real-time flame morphology, so that the real-time flame morphology conforms to the preset flame morphology image, achieving the adjustment and control of the real-time flame morphology.

[0069] Step S300: And / or, gradually adjust the cross-sectional area of the outlet end of the second flow channel 150 according to the change in the fuel flow rate of the second flow channel 150. The adjustment method of the fuel flow rate of the second flow channel 150 is basically the same as that of the first flow channel 140, which will not be elaborated here, and achieve continuous and uniform adjustment of the cross-sectional area of the second flow channel 150.

[0070] Specifically, according to the fuel flow rate of the first flow channel 140 and the fuel flow rate of the second flow channel 150, the cross-sectional area of the outlet end of the first flow channel 140 can be adjusted, or the cross-sectional area of the outlet end of the second flow channel 150 can be adjusted. Of course, the cross-sectional areas of the outlet ends of the first flow channel 140 and the second flow channel 150 can also be adjusted simultaneously. Herein, the fuel flow rate refers to the mass or quantity of fuel supply introduced into the flow channel to maintain combustion, and the fuel rate refers to the real-time flow velocity at the outlet of the fuel nozzle. For example, when the fuel rate increases and the fuel supply speed increases, the cross-sectional area of the flow channel can be reduced, and the fuel flow rate at the outlet of the flow channel remains unchanged, thereby ensuring the stability of combustion and avoiding the occurrence of flashback or unstable combustion flames. The continuous and uniform change and control of the mixed fuel ratio of multiple flow channels are realized, and the adjustment process is relatively continuous and uniform, reducing the non-linear change of fuel mixing adjustment, which may lead to unstable combustion flames or even flashback, ensuring the stability of combustion, and maintaining a high combustion efficiency.

[0071] In one embodiment, optionally, referring to Figure 4 and Figure 5 As shown, step S210: When the fuel rate of the first flow channel 140 increases, move the movable component 120 towards the end close to the first housing 110, so that the cross-sectional area of the outlet end of the first flow channel 140 gradually decreases. Correspondingly, the increase in the fuel rate of the first flow channel 140 reduces the outlet cross-sectional area of the first flow channel 140 by moving the movable component 120. Step S220: Or when the fuel rate of the first flow channel 140 decreases, move the movable component 120 towards the end away from the first housing 110, so that the cross-sectional area of the outlet end of the first flow channel 140 gradually increases, that is, when the fuel rate decreases, the outlet cross-sectional area of the first flow channel 140 is increased. It can be understood that during the fuel flow in the first flow channel 140 or the second flow channel 150, the change in the cross-sectional area of the outlet of the flow channel will affect the flow velocity and pressure. According to Bernoulli's principle, when the cross-sectional area of the outlet of the flow channel decreases, the flow velocity at the outlet end increases and the pressure decreases, and vice versa.

[0072] In one embodiment, optionally, as Figure 4 and Figure 5As shown, step S310: When the fuel rate in the second flow channel 150 increases, move the first housing 110 towards the end close to the second housing 130, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually decreases. When the fuel rate in the second flow channel 150 increases, move the first housing 110 to reduce the cross-sectional area of the outlet end of the second flow channel 150, and the reduction amplitude of the cross-sectional area changes continuously to maintain the stability of the fuel flame, and the outlet flow rate of the fuel in the second flow channel 150 remains unchanged. Step S320: Or when the fuel rate in the second flow channel 150 decreases, move the first housing 110 towards the end away from the second housing 130, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually increases. The cross-sectional area of the outlet end of the second flow channel 150 increases, and the increase amplitude of the cross-sectional area changes continuously, maintaining the change of the second flow channel 150 to avoid a greater impact on the combustion stability, and having a better technical effect.

[0073] In another embodiment, optionally, when it is necessary to reduce the fuel flow rate in the first flow channel 140, keep the fuel rate at the outlet end of the first flow channel 140 unchanged, move the first housing 110 towards the end close to the second housing 130, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually decreases. Move the first housing 110 to reduce the cross-sectional area of the outlet end of the second flow channel 150. Conversely, when it is necessary to increase the fuel flow rate in the first flow channel 140, move the first housing 110 to increase the cross-sectional area of the outlet end of the second flow channel 150. When it is necessary to reduce the fuel flow rate in the second flow channel 150, move the first housing 110 towards the end close to the second housing 130, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually decreases. Move the first housing 110 to reduce the cross-sectional area of the outlet end of the second flow channel 150, and the reduction amplitude of the cross-sectional area changes continuously, and the fuel rate at the outlet end of the second flow channel 150 remains unchanged. Or when the fuel flow rate in the second flow channel 150 increases, move the first housing 110 towards the end away from the second housing 130, so that the cross-sectional area of the outlet end of the second flow channel 150 gradually increases. The cross-sectional area of the outlet end of the second flow channel 150 increases, and the increase amplitude of the cross-sectional area changes continuously, still keeping the fuel rate at the outlet end of the second flow channel 150 unchanged. In other words, by adjusting the cross-sectional area of the outlet end of the first flow channel 140 or the second flow channel 150, the fuel flow rate of the first flow channel 140 or the second flow channel 150 can be changed while the fuel rate at the outlet end remains unchanged.

[0074] In all the examples shown and described here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0075] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A combustion device, characterized in that: include: A first shell, wherein a first output portion is disposed at an end of the first shell, and a cross-sectional area of ​​the first output portion gradually decreases toward the end of the first shell; A movable component, the movable component is inserted into the first shell, and the movable component can reciprocate relative to the first shell along a first direction, the movable component and the first shell define a first flow channel, the first direction is the length direction of the combustion device, so that the cross-sectional area of ​​the outlet end of the first flow channel gradually changes; A second shell, the second shell is sleeved on the first shell and defines a second flow channel with the first shell, a second output portion is arranged at the end of the second shell, and the cross-sectional area of ​​the second output portion gradually decreases toward the end of the second shell, the second output portion is arranged corresponding to the first output portion, and the second shell can reciprocate relative to the first shell along the first direction so that the cross-sectional area of ​​the outlet end of the second flow channel gradually changes.

2. The combustion device according to claim 1, characterized in that: The movable assembly includes a movable rod, a first transmission member and a first driving member, and the first driving member drives the movable rod to move relatively along a first direction through the first transmission member.

3. The combustion device according to claim 2, characterized in that: A third adjusting portion is disposed at one end of the movable rod close to the first output portion, and a cross-sectional area of ​​the third adjusting portion gradually decreases toward the end of the first shell.

4. The combustion device according to claim 1, characterized in that: It also includes a second transmission member and a second driving member, and the second driving member drives the first housing to move relative to the first direction through the second transmission member.

5. The combustion device according to claim 1, characterized in that: The first output portion and the second output portion are both conical structures.

6. The combustion device according to any one of claims 1 to 5, characterized in that: The combustion device has at least a first position. When the combustion device is in the first position, the outlet end of the first flow channel and the outlet end of the second flow channel are located in the same plane.

7. The combustion device according to any one of claims 1 to 5, characterized in that: The combustion device has a second position. When the combustion device is in the second position, the movable assembly closes the outlet end of the first flow channel, and the second shell abuts against the first shell and closes the outlet end of the second flow channel.

8. A combustion operation method, using the combustion device according to any one of claims 1 to 7, characterized in that: The combustion operation method comprises: Obtaining the fuel flow rate of the first flow channel and the fuel flow rate of the second flow channel; gradually adjusting the cross-sectional area of ​​the outlet end of the first flow channel according to the change of the fuel flow rate of the first flow channel; And / or, gradually adjusting the cross-sectional area of ​​the outlet end of the second flow channel according to the change of the fuel flow rate of the second flow channel.

9. The combustion operation method according to claim 8, characterized in that: When the fuel rate of the first flow channel increases, the movable component is moved toward the end direction close to the first shell so that the cross-sectional area of ​​the outlet end of the first flow channel gradually decreases; or when the fuel rate of the first flow channel decreases, the movable component is moved toward the end direction away from the first shell so that the cross-sectional area of ​​the outlet end of the first flow channel gradually increases.

10. The combustion operation method according to claim 8, characterized in that: When the fuel rate of the second flow channel increases, the first shell is moved toward the end direction close to the second shell, so that the cross-sectional area of ​​the outlet end of the second flow channel gradually decreases; or when the fuel rate of the second flow channel decreases, the first shell is moved toward the end direction away from the second shell, so that the cross-sectional area of ​​the outlet end of the second flow channel gradually increases.

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