Combustion device

Abstract

The utility model relates to the technical field of metallurgy, in particular to a combustion device which comprises a first spray gun and a gas supply assembly. The air supply component is provided with a first air conveying end and a second air conveying end, the first air conveying end of the air supply component is connected with the first conveying component inlet, the second end of the air supply component is connected with the second conveying component inlet, the first spray gun comprises an outer spray pipe and an inner spray pipe, an air spray hole is formed in the outer spray pipe, and the inner spray pipe is at least partially located in the air spray hole. An inlet of the outer spray pipe is connected with an outlet of the first transmission component, an inlet of the inner spray pipe is connected with an outlet of the second transmission component, and the flow area between the inner wall of the outer spray pipe and the outer wall of the inner spray pipe in the radial direction of the first spray gun is larger than that of the inner spray pipe in the radial direction of the first spray gun. According to the combustion device, the blocking probability can be reduced, and the combustion efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical technique field, concretely relates to a combustion device. BACKGROUND

[0002] Submerged combustion technology is a kind of technology that burner is directly immersed in the molten pool, and smelting is carried out by the heat generated by combustion, and is widely used in metal smelting industry.However, the traditional submerged combustion device when conveying fuel (such as natural gas) and combustion-supporting gas (such as oxygen, air and the like gas), there are low combustion efficiency, easy to block and other problems. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the related art is solved to some extent.The embodiment of the utility model proposes a combustion device, which can avoid blockage and improve combustion efficiency.

[0004] The combustion device of the embodiment of the utility model, comprising:

[0005] Gas supply component, the gas supply component includes first transmission component, second transmission component and gas supply component, the gas supply component has first gas delivery end and second gas delivery end,

[0006] First transmission component and second transmission component, the first gas delivery end of the gas supply component is connected with the first transmission component import, and the second end of the gas supply component is connected with the second transmission component import;

[0007] First spray gun, the first spray gun includes outer spray pipe and inner spray pipe, the outer spray pipe has gas injection hole, the inner spray pipe is at least partially located in the gas injection hole, and the outer spray pipe import is connected with the outlet of the first transmission component, and the import of the inner spray pipe is connected with the outlet of the second transmission component,

[0008] Wherein, the flow area between the outer spray pipe inner wall and the inner spray pipe outer wall in the first spray gun radial direction is greater than the flow area of the inner spray pipe in the first spray gun radial direction.The combustion device of the embodiment of the utility model can reduce the probability of blockage and improve the combustion efficiency.

[0009] In some embodiments, the first transmission component and the second transmission component each include a first check valve and a flame arrester, one end of the first check valve is connected with the first gas delivery end or the second gas delivery end of the gas supply component, and the other end of the first check valve is connected with one end of the flame arrester.

[0010] In some embodiments, the first spray gun is further provided with a plurality of vortex holes, the plurality of vortex holes are arranged in a circumferential direction around the gas injection hole, and the vortex holes are communicated with the gas injection hole.

[0011] In some embodiments, the vortex hole is in any one of a rectangular shape, a circular shape, or a triangular shape.

[0012] In some embodiments, the jet hole is in any one of a rectangular shape, a circular shape, or a triangular shape.

[0013] In some embodiments, the combustion device further comprises a cooling and heat insulation component arranged on the outer circumferential surface of the first and second transmission components for cooling and heat insulation.

[0014] In some embodiments, the combustion device further comprises a second lance and a mixing component, one end of the mixing component being connected to the first and second transmission component outlets respectively, and the other end of the mixing component being connected to the second lance.

[0015] In some embodiments, the first and second gas supply ends of the gas supply component are each provided with a second check valve.

[0016] In some embodiments, the inner and outer nozzles are integrally formed.

[0017] In some embodiments, the first and second gas supply ends of the gas supply component are each provided with a pressure sensor and a flow sensor. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of a lance cross section of a combustion device in the related art.

[0019] Figure 2 is a schematic view of a combustion device according to an embodiment of the present application.

[0020] Figure 3 is a schematic view of a mixing component according to an embodiment of the present application.

[0021] Figure 4 is a schematic view of a first lance cross section according to an embodiment of the present application.

[0022] Figure 5 is a schematic view of a first lance cross section according to an embodiment of the present application.

[0023] Figure 6 is a schematic view of a first lance cross section according to an embodiment of the present application.

[0024] REFERENCE NUMERALS:

[0025] gas supply assembly 1, gas supply component 11, first transmission component 12, second transmission component 13, first check valve 131, flame arrester 132, second check valve 14,

[0026] second lance 2, mixing component 3,

[0027] Cooling and heat insulation component 4,

[0028] First spray gun 5, outer nozzle 51, air jet hole 511, vortex hole 512, inner nozzle 52, nozzle 521.

[0029] Natural gas nozzle 6, oxygen nozzle 7. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The combustion device of this embodiment includes a first transmission component 12, a second transmission component 13, a gas supply component 11, and a first spray gun 5. The gas supply component 1 includes the first transmission component 12, the second transmission component 13, and the gas supply component 11. The gas supply component 11 has a first gas delivery end and a second gas delivery end. The first gas delivery end of the gas supply component 11 is connected to the inlet of the first transmission component 12, and the second gas delivery end of the gas supply component 11 is connected to the inlet of the second transmission component 13. The first spray gun 5 includes an outer nozzle 51 and an inner nozzle 52. The outer nozzle 51 has a jet hole 511, and the inner nozzle 52 is at least partially located within the jet hole 511. The inlet of the outer nozzle 51 is connected to the outlet of the first transmission component 12, and the inlet of the inner nozzle 52 is connected to the outlet of the second transmission component 13.

[0032] The flow area between the inner wall of the outer nozzle 51 and the outer wall of the inner nozzle 52 in the radial direction of the first spray gun 5 is greater than the flow area of ​​the inner nozzle 52 in the radial direction of the first spray gun 5. The first spray gun 5 is adapted to extend into the rotary kiln.

[0033] Specifically, such as Figures 1 to 5 As shown, the gas supply component 11 is adapted to supply natural gas and oxygen-enriched air to the first transmission component 12 and the second transmission component 13, respectively. For example, the second gas supply end of the gas supply component 11 is connected to the inlet of the second transmission component 13 to supply natural gas, and then the first gas supply end of the gas supply component 11 is connected to the first transmission component 12 to supply oxygen-enriched air. Subsequently, the inner nozzle 52 outputs natural gas, and the outer nozzle 51 outputs oxygen-enriched air. The flow area between the outer nozzle 51 and the inner nozzle 52 is larger than the area of ​​the nozzle 521 of the inner nozzle 52 from which natural gas flows.

[0034] By placing the natural gas in the inner nozzle 52 for ejection, it can mix with oxygen more directly and efficiently. With natural gas on the inside and oxygen surrounding it on the outside, this arrangement promotes a more uniform gas-fuel mixture, resulting in a more complete combustion reaction and improved combustion efficiency. The oxygen-enriched air output from the outer nozzle 51 forms a surrounding layer around the inner nozzle 52. This structure not only contributes to the complete combustion of natural gas but also prevents localized overheating and carbon buildup by increasing airflow velocity and turbulence. Carbon buildup is a common cause of blockage during combustion; therefore, reducing carbon buildup helps keep the nozzle clear and reduces the probability of blockage.

[0035] Meanwhile, because the flow area between the outer nozzle 51 and the inner nozzle 52 is larger than the area through which natural gas flows in the inner nozzle 52, the probability of blockage is reduced when the nozzle extends into the furnace for combustion. The larger flow area also means less resistance to the airflow as it passes through the nozzle, allowing for smoother airflow. During combustion, a smooth airflow reduces the deposition of impurities and unburned particles within the nozzle, thus lowering the risk of blockage. The larger flow area also means more space inside the nozzle, facilitating cleaning and maintenance when needed. For example, specialized tools or airflow can be used to remove carbon deposits or impurities from the nozzle without disassembling the entire nozzle assembly.

[0036] In actual use, combustion conditions inside the furnace may change (such as changes in fuel type, adjustments to combustion load, etc.). A larger flow area allows the nozzle system to better adapt to these changes, maintaining a stable combustion state by adjusting the airflow velocity and mixing ratio, avoiding incomplete combustion, and also reducing the risk of blockage caused by changes in combustion conditions.

[0037] like Figure 1 The image shows a conventional spray gun, for example, equipped with natural gas nozzles 6 and oxygen nozzles 7. The natural gas nozzles 6 are arranged circumferentially around the oxygen nozzles 7 and are spaced apart. Conventional spray guns suffer from low combustion efficiency and clogging issues during use. For instance, with a fixed spray gun size, the usable flow area of ​​the outer natural gas nozzles 6 is smaller than the flow area of ​​the gas ejected from the outer nozzle 8 in this application. Furthermore, fuel entering the spray gun during operation in the rotary kiln or side-blown furnace can cause clogging, or carbon deposits generated from the fuel-carried gas can also lead to clogging. Alternatively, molten metal during operation in the rotary kiln or side-blown furnace can enter the spray gun, causing clogging.

[0038] The combustion device of the embodiment of the utility model, through setting up inner spout 52 and outer spout 51, the flow area between the inner wall of outer spout 51 and the outer wall of inner spout 52 in the radial direction of first lance 5 is greater than the flow area of inner spout 52 in the radial direction of first lance 5, natural gas is in the inside, and oxygen is surrounded in the outside, and this layout is beneficial to forming more uniform mixed gas, so that combustion reaction is more sufficient, thereby improve combustion efficiency, and the larger flow area also means that the space inside the spout is more spacious, reduces the impurity blockage of first lance 5 in the combustion process, and facilitates cleaning and maintenance work when needed.

[0039] Further, the cleaning component and the blowing component are arranged at one end of the first lance 5 close to the air injection hole 511, the cleaning component is connected with the outer spout 51, the cleaning component is suitable for spraying cleaning liquid between the inner wall surface of the outer spout 51 and the outer wall surface of the inner spout 52, so as to clean the impurities of the first lance 5 subsequently, the blowing component is connected with the outer spout 51, so as to spray gas between the inner wall surface of the outer spout 51 and the outer wall surface of the inner spout 52, and the output ends of the blowing component and the cleaning component are each provided with a one-way valve to avoid backflow of the gas or the liquid.

[0040] In some embodiments, the first transmission component 12 and the second transmission component 13 include a first check valve 131 and a fire retardant device 132, one end of the first check valve 131 is connected with the first gas supply end or the second gas supply end of the gas supply component 11, and the other end of the first check valve 131 is connected with one end of the fire retardant device 132.

[0041] Specifically, as shown in the figure, Figures 1 to 5 the first transmission component 12 includes the first check valve 131 and the fire retardant device 132, one end of the first check valve 131 is connected with the first gas supply end or the second gas supply end of the gas supply component 11, and the other end of the first check valve 131 is connected with one end of the fire retardant device 132, for example, the first check valve 131 of the first transmission component 12 is connected with the first gas supply end of the gas supply component 11, one end of the fire retardant device 132 of the first transmission component 12 is connected with the first check valve 131 of the first transmission component 12, and the output end of the fire retardant device 132 of the first transmission component 12 is connected with the outer spout 51 to transmit oxygen-enriched air.

[0042] The first check valve 131 of the second transmission component 13 is connected with the second gas supply end of the gas supply component 11, one end of the fire retardant device 132 of the second transmission component 13 is connected with the first check valve 131 of the second transmission component 13, and the output end of the fire retardant device 132 of the second transmission component 13 is connected with the inner spout 52 to transmit oxygen-enriched air.

[0043] By setting the first transmission component 12 and the second transmission component 13, the flame or high-temperature gas in the combustion process flows back to the gas supply system. When the flame tries to flow back, the check valve will quickly close, cutting off the gas flow path, effectively preventing the occurrence of backfire phenomenon, protecting the safety of the gas supply component 11 and the entire system. The combination of the first check valve 131 and the flame arrester 132 helps to reduce the emission of harmful gases and particulate matter.

[0044] In some embodiments, the first lance 5 is also provided with a plurality of vortex holes 512, which are arranged circumferentially around the air injection hole 511 and communicate with the air injection hole 511.

[0045] The vortex hole 512 communicates with the air injection hole 511. By arranging the vortex hole 512 circumferentially around the air injection hole 511, the area of the first lance 5 through which the oxygen-enriched air flows is increased, while the air injection hole 511 is prevented from being blocked, and the operating space of the operator is increased, facilitating the operator to clean the vortex hole 512 and the air injection hole 511 regularly.

[0046] The vortex hole 512 is designed circumferentially around the air injection hole 511, which mainly guides the oxygen-enriched air into the combustion area in the form of a vortex. This vortex flow has the following advantages:

[0047] Increase mixing efficiency: Vortex can enhance the mixing of oxygen-enriched air and fuel, making the fuel burn more fully, thereby improving combustion efficiency.

[0048] Promote combustion stability: Vortex helps to stabilize the flame, reduce the flickering and instability of the flame, and make the combustion process more stable.

[0049] Increase combustion speed: Vortex can accelerate the reaction rate of fuel and oxygen, thereby increasing the combustion speed and increasing the heat release rate.

[0050] In some embodiments, the shape of the vortex hole 512 is any one of a rectangle, a circle or a triangle.

[0051] The shape of the vortex hole 512 is any one of a rectangle, a circle or a triangle, which can be used for different use requirements. The rectangular vortex hole 512 can provide a relatively stable vortex field, because the geometric characteristics of the rectangle make it easier for the air flow to form regular vortexes when passing through. In addition, the design of the rectangular vortex hole 512 is relatively simple, easy to process and manufacture. The rectangular vortex hole 512 can ensure that the air is evenly distributed inside the lance and fully mixed with the fuel, thereby improving the combustion efficiency.

[0052] The circular vortex hole 512 can generate a relatively strong vortex effect because the circular boundary has a stronger guiding effect on the airflow, making it easier to form a vortex when passing through. In addition, the circular vortex hole 512 also has good fluid dynamics performance, which can reduce airflow resistance and energy loss. The circular vortex hole 512 can accelerate the mixing process of air and fuel, increase the combustion reaction rate, and is suitable for high-speed combustion or combustion systems that require rapid start-up.

[0053] The triangular vortex hole 512 has a unique shape that can generate a vortex with a specific direction and strength. The acute angle part of the triangle can guide the airflow to form a sharp vortex, while the obtuse angle part may have a certain inhibitory effect on the vortex. Therefore, the design of the triangular vortex hole 512 needs to be more delicate to ensure that the generation and distribution of the vortex meet the expectations. The design of the triangular vortex hole 512 can be optimized for specific combustion needs to achieve the best combustion effect and performance.

[0054] In some embodiments, as shown in Figures 4 to 6 The shape of the jet hole 511 can be any of rectangular, circular, or triangular to adopt different shapes according to different use requirements.

[0055] In some embodiments, the combustion device further comprises a cooling and heat insulation component 4 arranged on the outer circumferential surface of the first transmission component 12 and the second transmission component 13 for heat insulation and cooling. Since the temperature near the combustion device is relatively high, for example, the temperature near the rotary furnace is relatively high, it is necessary to install the cooling and heat insulation component 4 to protect the natural gas and combustion-supporting gas pipeline. By installing the cooling and heat insulation component 4, the temperature of the pipeline can be significantly reduced, protecting the pipeline material from high temperature damage. The safety and reliability of the pipeline are improved, and the service life is prolonged. The thermal stress caused by high temperature is reduced, and the risk of pipeline deformation is reduced. The working environment is improved, and the potential harm to the operator caused by high temperature is reduced.

[0056] In some embodiments, the combustion device further comprises a second lance 2 and a mixing component 3, one end of the mixing component 3 is connected to the first transmission component outlet and the second transmission component outlet respectively, and the other end of the mixing component 3 is connected to the second lance 2.

[0057] Specifically, as shown in Figures 1 to 5As shown, the mixing component 3 mixes the fluid output by the first transmission component and the second transmission component in advance, the second lance 2 can be installed on the side wall of the side-blown furnace, and the mixed gas is sprayed into the side-blown furnace through the nozzle 521 of the second lance 2. Since the natural gas and the combustion-supporting gas have been fully mixed in the mixing bin, the mixed gas can be rapidly combusted after being sprayed into the molten pool of the side-blown furnace, thereby improving the smelting efficiency. Compared with the natural gas and the combustion-supporting gas being respectively sprayed into the molten pool through two channels, the mixed fuel and the combustion-supporting gas can form a more uniform flame after being sprayed into the molten pool, thereby improving the temperature distribution of the molten pool and improving the smelting quality. The mixing component 3 can be a conventional gas mixing device, the fuel gas and the combustion-supporting gas are mixed in the mixing device, and then the lance is installed on the side wall of the side-blown furnace, and the mixed gas is sprayed into the molten pool through the nozzle 521 of the lance. Since the natural gas and the combustion-supporting gas have been fully mixed in the mixing bin, the mixed gas can be rapidly combusted after being sprayed into the molten pool, thereby improving the smelting efficiency.

[0058] In some embodiments, the first gas supply end and the second gas supply end of the gas supply component 11 are each provided with a second check valve 14. In order to avoid gas backfire and improve the stability and safety of gas supply.

[0059] In some embodiments, the inner nozzle 52 and the outer nozzle 51 are integrally formed, which can improve the structural strength of the inner nozzle and the outer nozzle.

[0060] In some embodiments, the first gas supply end and the second gas supply end of the gas supply component 11 are each provided with a pressure sensor and a flow sensor. The gas supply component 11 is further provided with a pressure adjusting component and a flow adjusting component, so that the gas supply component 11 can adjust the flow, pressure and mixing ratio of the natural gas and the combustion-supporting gas such as oxygen and air according to the smelting requirements in actual production, thereby improving the stability and safety of use.

[0061] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0062] In addition, the terms "first", "second", "third", etc. are used herein only to describe different instances, and are not to be construed as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0063] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0065] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the description, the illustrative representation of the above terms is not necessarily directed 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 application and the features of different embodiments or examples without contradiction.

[0066] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A combustion apparatus, characterized by, The application relates to a gas supply device. The gas supply device comprises a first transmission component, a second transmission component and a gas supply component, the gas supply component has a first gas supply end and a second gas supply end, The first gas supply end of the gas supply component is connected with the inlet of the first transmission component, and the second gas supply end of the gas supply component is connected with the inlet of the second transmission component. The first spray gun comprises an outer spray pipe and an inner spray pipe, the outer spray pipe is internally provided with a gas injection hole, the inner spray pipe is at least partially located in the gas injection hole, the inlet of the outer spray pipe is connected with the outlet of the first transmission component, and the inlet of the inner spray pipe is connected with the outlet of the second transmission component, wherein the flow area between the inner wall of the outer spray pipe and the outer wall of the inner spray pipe in the radial direction of the first spray gun is larger than the flow area of the inner spray pipe in the radial direction of the first spray gun.

2. The combustion apparatus of claim 1, wherein The first transmission component and the second transmission component each comprise a first check valve and a flame arrester, one end of the first check valve is connected with the first gas supply end or the second gas supply end of the gas supply component, and the other end of the first check valve is connected with one end of the flame arrester.

3. The combustion apparatus of claim 2, wherein The first spray gun is further provided with a plurality of vortex holes, the plurality of vortex holes are arranged in a circumferential interval around the gas injection hole, and the vortex holes are communicated with the gas injection hole.

4. The combustion apparatus of claim 3, wherein The shape of the vortex hole is any one of a rectangle, a circle or a triangle.

5. The combustion apparatus of claim 3, wherein The shape of the gas injection hole is any one of a rectangle, a circle or a triangle.

6. The combustion apparatus of claim 1, wherein The gas supply device further comprises a cooling and heat insulation component, the cooling and heat insulation component is arranged on the outer circumferential surface of the first transmission component and the second transmission component to perform heat insulation and cooling.

7. The combustion apparatus of claim 1, wherein The gas supply device further comprises a second spray gun and a mixing component, one end of the mixing component is connected with the outlet of the first transmission component and the outlet of the second transmission component respectively, and the other end of the mixing component is connected with the second spray gun.

8. The combustion apparatus of claim 1, wherein The first gas supply end and the second gas supply end of the gas supply component are each provided with a second check valve.

9. The combustion apparatus of claim 1, wherein The inner spray pipe and the outer spray pipe are integrally formed.

10. The combustion apparatus of claim 1, wherein The first gas supply end and the second gas supply end of the gas supply component are each provided with a pressure sensor and a flow sensor.

Images