Complete burner and oxygen-enriched side-blown furnace

Abstract

The utility model provides a kind of complete set burner and oxygen-enriched side-blown furnace, it is related to oxygen-enriched side-blown furnace technical field, complete set burner includes tee pipe body, copper cooling jacket air nozzle head copper jacket, tee pipe body is equipped with the acute angle setting and the cleaning passage of openable feed channel, and the output channel of being equipped in two passage junction, copper cooling jacket air nozzle head copper jacket is equipped with through channel, one end of copper cooling jacket air nozzle head copper jacket is detachably connected with tee pipe body, copper cooling jacket air nozzle head copper jacket is equipped with coiled cooling water channel, through channel includes first straight section and second straight section, second straight section is close to furnace body, the size of second straight section is less than the size of first straight section, cleaning passage is closed when feed channel transports oxygen and coal powder.The burner presented by the utility model has the advantages of high temperature resistance, thermal shock resistance and strong corrosion resistance, which can to some extent avoid the problems of burning, deformation and blockage caused by high-temperature melt flushing the burner head, so frequent replacement of the burner is not needed, the maintenance cost and downtime are reduced, and the production continuity is ensured.

Description

Technical Field

[0001] This utility model relates to the field of oxygen-enriched side-blown furnace technology, and in particular to a complete set of burners and an oxygen-enriched side-blown furnace. Background Technology

[0002] Oxygen-enriched side-blown furnaces are highly efficient smelting equipment widely used in non-ferrous metal smelting (such as copper and lead). They achieve high-temperature smelting reactions by injecting oxygen-enriched air and fuel into the furnace. The burner, as the core component of the oxygen-enriched side-blown furnace, is responsible for mixing fuel and oxygen, injecting fuel, and organizing combustion. Its performance directly affects the combustion efficiency, temperature distribution, and smelting effect within the furnace. High-efficiency, long-life burner technology is of great significance for improving smelting efficiency, reducing energy consumption, and minimizing pollutant emissions.

[0003] Currently, oxygen-enriched side-blown furnace burners mainly adopt single-channel or multi-channel structures. Fuel and oxygen are initially mixed in a mixing chamber before being injected into the furnace for combustion. Traditional burner cooling systems typically employ a simple straight-pipe design, resulting in low cooling water flow rates, short flow paths, and limited heat exchange efficiency. Under high-temperature melt scouring and strong oxidation-reduction environments, the burner's high-temperature resistance and thermal shock resistance are insufficient, making the burner head prone to burn-out, deformation, and blockage. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a complete set of burners and oxygen-enriched side-blown furnace, which aims to solve the technical problems of insufficient high temperature resistance and thermal shock resistance of existing burners, and the burner head being prone to burn-out, deformation and blockage.

[0005] To achieve the above objectives, this utility model proposes a complete burner assembly, including a three-way pipe body, a copper cooling water jacket nozzle, and a copper water jacket. The three-way pipe body has a material conveying channel and a closable cleaning channel arranged at an acute angle, as well as an output channel located at the intersection of the material conveying channel and the cleaning channel. The copper cooling water jacket nozzle has a through channel, one end of which is detachably connected to the three-way pipe body to connect the output channel and the through channel. The copper cooling water jacket nozzle has a coiled cooling water channel inside, which is used to input circulating coolant. The through channel includes a first straight section and a second straight section, the second straight section being closer to the furnace body and smaller in size than the first straight section. The cleaning channel is closed when the material conveying channel is supplying oxygen.

[0006] In addition, the complete set of burners according to the present invention may also have the following additional technical features: Furthermore, the copper cooling water jacket nozzle head copper water jacket is inverted conical in shape, and the small diameter end of the copper cooling water jacket nozzle head copper water jacket is close to the furnace body.

[0007] Furthermore, the cooling water channel is a copper pipe.

[0008] Furthermore, the central spiral of the cooling water channel is arranged around the through channel.

[0009] Furthermore, each end of the cooling water channel has an inlet connector and an outlet connector, and the inlet connector and the outlet connector are located on the side of the copper cooling water jacket nozzle head copper water jacket away from the furnace body.

[0010] Furthermore, the included angle between the water inlet connector and the water outlet connector is 40 degrees.

[0011] Furthermore, an assembly groove is provided around the periphery of the output channel. The size of the assembly groove is larger than the size of the inlet of the first straight section. A flange is provided around the inlet end of the first straight section, and the flange is sealed to the assembly groove.

[0012] Furthermore, a sealing gasket is sandwiched between the flange and the assembly groove.

[0013] Furthermore, the three-way pipe body is provided with a blocking channel communicating with the cleaning channel. The blocking channel is inclined relative to the cleaning channel, and the size of the blocking channel is larger than the size of the cleaning channel. A steel ball is slidably disposed in the blocking channel.

[0014] On the other hand, based on the same inventive concept, this utility model also proposes an oxygen-enriched side-blown furnace, including the aforementioned complete set of burners and furnace body. The side wall of the furnace body is provided with mounting holes, and the copper cooling water jacket nozzle copper water jacket is installed and fixed in the mounting holes so that the through channel is connected to the furnace cavity inside the furnace body.

[0015] The beneficial effects of this utility model include at least the following: by adopting a copper cooling water jacket nozzle head copper water jacket and an internal coiled cooling water channel structure, the circulation efficiency and heat exchange capacity of the coolant are improved, effectively reducing the risk of high-temperature burn-off of the burner head, enhancing the burner's thermal shock resistance, and extending its service life; at the same time, the three-way pipe body is equipped with an openable and closable cleaning channel and an inclined sealing channel, combined with a sliding steel ball design, which facilitates the regular cleaning of accumulated ash or slag in the material conveying channel, avoiding blockage problems, ensuring stable delivery of oxygen and fuel, and improving the continuity and reliability of the smelting process; the output channel and the copper cooling water jacket nozzle head copper water jacket achieve quick disassembly and assembly through the sealing fit of the flange and assembly groove, and the sealing gasket further prevents gas leakage, which not only ensures sealing performance in high-temperature environments, but also facilitates maintenance and replacement. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of a complete set of burners according to an embodiment of the present invention; Figure 2 for Figure 1 Sectional view at point AA; Figure 3 for Figure 1 A magnified view of a section at point C; Figure 4 for Figure 1 A magnified view of a section at point D; Explanation of key component symbols: 100 T-shaped pipe body, 110 conveying channel, 120 cleaning channel, 130 output channel, 131 assembly slot, 140 sealing channel, 141 steel ball, 200 copper cooling water jacket nozzle head copper water jacket, 210 through channel, 211 first straight section, 211 flange, 2111 second straight section, 220 cooling water channel, 221 inlet connector, 222 outlet connector, 300 plug rod, 400 positioning sleeve, 500 vent water jacket, 600 sealing gasket; The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figures 1 to 4The present application provides a complete burner assembly, comprising a three-way pipe body 100, a copper cooling water jacket nozzle, and a copper water jacket 200. Specifically, the three-way pipe body 100 is provided with a material conveying channel 110 and an openable and closable cleaning channel 120, as well as an output channel 130 located at the intersection of the material conveying channel 110 and the cleaning channel 120. When the material conveying channel 110 is conveying oxygen, compressed air, and pulverized coal, the cleaning channel 120 is closed to prevent compressed air, pulverized coal, oxygen, and fuel from leaking from the cleaning channel 120. Meanwhile, since the molten pool of the oxygen-enriched side-blown furnace usually has swirling or convective motion, in order to enhance the penetration and stirring intensity of the mixed gas of compressed air, pulverized coal, oxygen and fuel into the melt and promote full melting, the direction of the mixed gas jet and the flow direction of the molten pool are made to form a specific angle. Specifically, the conveying channel 110 and the cleaning channel 120 are set in an acute angle assembly state. At the same time, a through channel 210 is set in the middle of the copper water jacket 200 of the copper cooling water jacket tuyeres, and one end of the copper water jacket 200 of the copper cooling water jacket tuyeres is detachably connected to the three-way pipe 100. In this way, when the copper water jacket 200 of the copper cooling water jacket tuyeres is connected to the three-way pipe 100, the output channel 130 is connected to the through channel 210. At this time, the compressed air, pulverized coal, oxygen and fuel input from the conveying channel 110 are initially mixed in the output channel 130 and then injected into the furnace for combustion. In addition, to ensure the smooth flow of compressed air, pulverized coal oxygen, and fuel, the conveying channel 110, the through channel 210, and the output channel 130 are all straight.

[0021] Meanwhile, since the burner tip extends into the furnace body, to prevent the burner from being corroded by high temperature, a copper cooling water jacket nozzle head copper water jacket 200 is installed on the vent water jacket 500, and a cooling water channel 220 is set inside the copper cooling water jacket nozzle head copper water jacket 200. The cooling water channel 220 is used to input circulating coolant, such as by using a circulating cooling pump. Moreover, in order to improve heat exchange efficiency, the cooling water channel 220 is coiled around the body of the copper cooling water jacket nozzle head copper water jacket 200, and the cooling water channel 220 is arranged around the through channel 210. In this way, by utilizing the strong thermal conductivity of copper and the strong heat-carrying capacity of the cooling medium in the cooling water channel 220, the resulting burner has the characteristics of high temperature resistance and strong thermal shock resistance. Thus, the burner head is not easy to burn or deform due to heat, thereby improving the service life of the burner.

[0022] Furthermore, during the smelting process, the burner nozzle may become clogged due to molten slag splashing, raw material impurity accumulation, or coking caused by temperature fluctuations. Therefore, a blocking rod 300 is needed to be inserted into the burner channel during furnace shutdown or intermittent operation to physically prevent molten slag or dust from entering and clearing the slag from the burner channel, keeping the burner unobstructed. Specifically, approximately every half hour, the blocking rod 300 is inserted sequentially into the cleaning channel 120 and the through channel 210, at which point the cleaning channel 120 is opened. In addition, to ensure smooth movement of the blocking rod 300, the cleaning channel 120 is designed to be straight and coaxial with both the output channel 130 and the through channel 210.

[0023] Furthermore, in order to prevent the blocking rod 300 from extending into the furnace body, the through channel 210 is divided into a first straight section 211 and a second straight section 212. The second straight section 212 is closer to the furnace body, and the size of the second straight section 212 is smaller than that of the first straight section 211. In this way, the front end of the blocking rod 300 will be stuck between the first straight section 211 and the second straight section 212, and will not continue to extend into the furnace body along the second straight section 212.

[0024] In some alternative embodiments, such as Figure 3 As shown, in order to prevent the blocking rod 300 from detaching from the cleaning channel 120 and the through channel 210, a positioning sleeve 400 is provided on the entrance side of the cleaning channel 120.

[0025] In some alternative embodiments, such as Figure 4 As shown, in order to facilitate the smooth insertion of the blocking rod 300 into the through channel 210, the inlet of the first straight section 211 is set in a trumpet shape, and the large diameter end of the first straight section 211 faces away from the furnace body.

[0026] In some alternative embodiments, such as Figure 1 As shown, the copper cooling water jacket nozzle head copper water jacket 200 is inverted conical in shape, and the small diameter end of the copper cooling water jacket nozzle head copper water jacket 200 is close to the furnace body. This setting can improve the sealing performance of the joint surface between the copper cooling water jacket nozzle head copper water jacket 200 and the air vent water jacket 500, and prevent the leakage of molten metal or flue gas.

[0027] In some optional embodiments, to ensure good heat dissipation and improve economy, the cooling water channel 220 is made of copper pipe. Specifically, the copper cooling water jacket nozzle copper water jacket 200 is cast using a pure copper pipe embedding process. First, the prepared copper pipe is fixed in the mold cavity. After the mold is closed with the casting system, molten copper is introduced, so that the copper pipe and the cast copper undergo metallurgical bonding and are thus cast into one piece.

[0028] In some alternative embodiments, such as Figure 1As shown, the central spiral of the cooling water channel 220 is arranged around the through channel 210, which can increase the heat exchange area, ensure that the front end of the burner has good heat dissipation performance, and to a certain extent avoid the burner head from being easily burned or thermally deformed.

[0029] In some alternative embodiments, such as Figure 2 As shown, inlet connectors 221 and outlet connectors 222 are respectively led out from both ends of the cooling water channel 220. In use, the circulating cooling pump is connected to the inlet connectors 221 and 222 via pipes and seals. Preferably, a heat insulation layer, such as a ceramic fiber heat insulation layer, can be wrapped around the inlet connectors 221 and 222 to reduce the risk of seal failure at the inlet connectors 221 and 222. In addition, the inlet connectors 221 and 222 are located on the side of the copper cooling water jacket 200 away from the furnace body. This arrangement allows the inlet and outlet ends of the cooling water channel 220 to be located on the outside of the furnace body (not the high-temperature radiant surface), avoiding direct thermal shock to the pipe interfaces from high-temperature gas / molten material.

[0030] In some alternative embodiments, such as Figure 2 As shown, the included angle B between the water inlet connector 221 and the water outlet connector 222 is 40 degrees. This not only allows for a certain amount of installation space to be reserved between the water inlet connector 221 and the water outlet connector 222, making it convenient for installers to install pipe fittings and other components, but also does not affect the installation of adjacent air nozzles.

[0031] In some alternative embodiments, such as Figure 4 As shown, to stably assemble the tee pipe body 100 and the copper cooling water jacket nozzle copper water jacket 200, an assembly groove 131 is provided around the periphery of the outlet end of the output channel 130. Simultaneously, it is necessary to ensure that the size of the assembly groove 131 is larger than the size of the inlet of the first straight section 211. A flange 2111 is provided around the periphery of the inlet end of the first straight section 211, and the flange 2111 and the assembly groove 131 are sealed together. Specifically, after the flange 2111 and the assembly groove 131 are aligned and inserted, they can be fixed with fasteners.

[0032] In some alternative embodiments, such as Figure 4 As shown, a sealing gasket 600 is sandwiched between the flange 2111 and the assembly groove 131. By setting the sealing gasket 600, a good seal can be formed between the flange 2111 and the assembly groove 131.

[0033] In some alternative embodiments, such as Figure 3As shown, in order to realize the function of opening and closing the cleaning channel 120, a blocking channel 140 communicating with the cleaning channel 120 is provided in the tee pipe body 100. The blocking channel 140 is inclined relative to the cleaning channel 120, and the size of the blocking channel 140 is larger than the size of the cleaning channel 120. A steel ball 141 is slidably arranged in the blocking channel 140. When the blocking rod 300 is not inserted into the cleaning channel 120, the steel ball 141 moves along the blocking channel 140 under the action of gravity to the intersection of the cleaning channel 120 and the blocking channel 140. Since the size of the blocking channel 140 is larger than the size of the cleaning channel 120, the steel ball 141 closes the cleaning channel 120. When the blocking rod 300 is inserted into the cleaning channel 120, the steel ball 141 moves in the opposite direction under the pushing action of the blocking rod 300 until it is supported by the circumference of the blocking rod 300.

[0034] In addition, this application also provides an oxygen-enriched side-blown furnace, including the aforementioned complete set of burners and furnace body. The side wall of the furnace body is provided with mounting holes, and the copper cooling water jacket nozzle copper water jacket 200 is installed and fixed in the mounting holes so that the through channel 210 communicates with the furnace cavity inside the furnace body. Optionally, the furnace body is provided with an air vent water jacket 500, and the copper cooling water jacket nozzle copper water jacket 200 is assembled on the air vent water jacket 500.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the appended claims.

Claims

1. A complete set of burners, characterized in that, The complete set of burners includes: The three-way pipe body is provided with a material conveying channel and an openable and closable cleaning channel set at an acute angle, and an output channel located at the intersection of the material conveying channel and the cleaning channel; The nozzle head copper water jacket has a through channel. One end of the nozzle head copper water jacket is detachably connected to the three-way pipe body to connect the output channel and the through channel. The nozzle head copper water jacket has a coiled cooling water channel for inputting circulating coolant. The through channel includes a first straight section and a second straight section. The second straight section is close to the furnace body and its size is smaller than that of the first straight section. The cleaning channel is closed when the material conveying channel is supplying oxygen.

2. The complete set of burners according to claim 1, characterized in that, The copper water jacket of the air nozzle head is inverted conical in shape, and the small diameter end of the copper water jacket of the air nozzle head is close to the furnace body.

3. The complete set of burners according to claim 2, characterized in that, The cooling water channel is made of copper pipes.

4. The complete set of burners according to claim 2, characterized in that, The cooling water channel is spirally arranged around the through channel in the middle.

5. The complete set of burners according to claim 2, characterized in that, Both ends of the cooling water channel have inlet and outlet connectors respectively, and the inlet and outlet connectors are located on the side of the vent head copper water jacket away from the furnace body.

6. The complete set of burners according to claim 5, characterized in that, The included angle between the water inlet connector and the water outlet connector is 40 degrees.

7. The complete set of burners according to claim 1, characterized in that, The output channel is provided with an assembly groove around its periphery. The size of the assembly groove is larger than the size of the inlet of the first straight section. The inlet end of the first straight section is provided with a flange around its periphery. The flange is sealed to the assembly groove.

8. The complete set of burners according to claim 7, characterized in that, A sealing gasket is sandwiched between the flange and the assembly groove.

9. The complete set of burners according to any one of claims 1 to 8, characterized in that, The three-way pipe body is provided with a blocking channel that communicates with the cleaning channel. The blocking channel is inclined relative to the cleaning channel, and the size of the blocking channel is larger than the size of the cleaning channel. Steel balls are slidably arranged in the blocking channel.

10. An oxygen-enriched side-blown furnace, characterized in that, include: The complete set of burners as described in any one of claims 1 to 9; The furnace body has mounting holes on its side walls, and the copper water jacket of the air nozzle is installed and fixed in the mounting holes so that the through channel communicates with the furnace cavity inside the furnace body.

Images