A bottom feed burner

Abstract

A bottom feeding type burner comprises a combustion chamber, three material pipes are arranged on the lower side of the combustion chamber through a second flange, a rotating shaft is arranged in the material pipe, a motor is arranged on the lower side of the material pipe to drive the rotating shaft, a first flange is arranged on the lower part of the material pipe, the first flange divides the material pipe into an upper pipe body and a lower pipe body, the lower pipe body is provided with a feeding pipe, the rotating shaft is provided with a blade corresponding to the upper pipe body, a natural gas pipe and a combustion-supporting gas pipe are sleeved on the outer side of the upper pipe body, the lower part of the natural gas pipe forms a first annular gas cavity with the upper pipe body, the upper part and the middle part of the natural gas pipe form a first annular gap with the upper pipe body, the upper side of the combustion-supporting gas pipe is connected with the second flange, the middle part of the combustion-supporting gas pipe forms a second annular gas cavity with the natural gas pipe, the upper part of the combustion-supporting gas pipe forms a second annular gap with the natural gas pipe, and the first annular gas cavity and the second annular gas cavity are respectively provided with a natural gas inlet pipe and a combustion-supporting gas inlet pipe.

Description

Technical Field

[0001] This invention relates to a bottom-feed burner. Background Technology

[0002] Hollow glass microspheres are hollow, micron-sized glass powders with excellent properties such as lightweight, high strength, fire resistance, thermal insulation, and corrosion resistance, making them widely used in numerous fields. "Research Progress on Preparation Methods and Applications of Hollow Glass Microspheres" introduces four preparation methods for hollow glass microspheres and discusses their application progress. Hollow glass microspheres prepared by the glass powder method exhibit the best performance, with burner design being one of the key technologies in this method. The traditional burner structure is described in Chinese patent CN210620594U. The outer layer of the furnace body is an insulation layer, and a cylindrical inorganic refractory inner liner is located in the center of the insulation layer. A cylindrical stainless steel inner wall is located along the inner wall of the lower half of the inorganic refractory inner liner. The top of the inorganic refractory inner liner is connected to the feed pipe, and a gas pipe is located outside the feed pipe. An auxiliary combustion gas pipe is located outside the gas pipe. The feed pipe, gas pipe, and mixed gas pipe are all connected to the burner. Simply put, the design concept of the traditional burner is a scheme of feeding each substance separately. This method will lead to uneven dispersion of glass powder, which will agglomerate when entering the sintering furnace from the combustion chamber, affecting the overall performance of the glass microspheres. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a bottom-feed burner that can effectively disperse glass powder so that it is evenly dispersed in the combustion chamber, spheroidized, and produce high-quality hollow glass microspheres.

[0004] To solve the above-mentioned technical problems, the present invention provides a bottom-feeding burner, including a combustion chamber. Three material pipes are arranged in a triangular pattern on the lower side of the combustion chamber via a horizontally arranged second flange. The material pipes are vertically arranged, open at the top and closed at the bottom. A vertically arranged rotating shaft is installed inside the material pipe, coaxial with the material pipe. A motor is installed below the material pipe, with its output shaft coaxially connected to the rotating shaft. A horizontally arranged first flange is located on the circumferential outer side of the lower part of the material pipe, dividing the material pipe into an upper pipe and a lower pipe. A feed pipe communicating with the lower pipe is located near its bottom on the circumference of the lower pipe. A number of blades arranged vertically at intervals are provided on the part of the upper pipe corresponding to the rotating shaft. A natural gas pipe and a combustion-supporting pipe are coaxially sleeved on the circumferential outer side of the upper pipe from the inside out. The diameters of the upper pipe, natural gas pipe, and combustion-supporting pipe increase sequentially. The upper side of the natural gas pipe is flush with the material pipe, and a gap is formed between the lower part of the natural gas pipe and the upper pipe. A first annular gas cavity for containing natural gas is formed. The diameter of the natural gas pipeline narrows at the top and middle in the height direction. A first annular gap for transporting natural gas is formed between the top and middle of the natural gas pipeline and the upper pipe body. The upper side of the combustion-supporting gas pipeline extends beyond the upper side of the material pipeline and the natural gas pipeline and is connected to the lower side of the second flange. A second annular gas cavity for containing combustion-supporting gas is formed between the middle of the combustion-supporting gas pipeline and the middle of the natural gas pipeline in the height direction. The upper inner diameter of the combustion-supporting gas pipeline narrows. A second annular gap for transporting combustion-supporting gas is formed between the upper part of the combustion-supporting gas pipeline and the upper part of the natural gas pipeline. Several natural gas inlet pipes are provided on the circumferential outer wall of the first annular gas cavity. Each natural gas inlet pipe is arranged radially along the natural gas pipeline. One end of each natural gas inlet pipe is connected to the first annular gas cavity. The other end of each natural gas inlet pipe extends radially out of the combustion-supporting gas pipeline. Several combustion-supporting gas inlet pipes are provided on the circumferential outer wall of the second annular gas cavity. Each combustion-supporting gas inlet pipe is radially connected to the inside and outside of the combustion-supporting gas pipeline.

[0005] For the sake of simplicity, the bottom-feeding burner described in this invention will be referred to as "this burner" in the following text.

[0006] How to use and the advantages of this burner:

[0007] Natural gas enters the first annular gas chamber through the natural gas inlet pipe, where it stabilizes the pressure. The natural gas then exits upwards through the first annular gap and enters the combustion chamber. Auxiliary combustion gas enters the second annular gas chamber through the auxiliary combustion gas inlet pipe and then enters the combustion chamber through the second annular gap. Natural gas and auxiliary combustion gas are ignited in a specific ratio. The annular gaps in both the auxiliary combustion gas and natural gas enhance the uniformity and stability of the gas flow. Glass powder raw material enters the material pipeline through the feed pipe and moves upwards. A motor drives a rotating shaft that rotates the blades. The rotating blades disperse the glass powder raw material, allowing it to spheroidize before entering the sintering furnace from the combustion chamber, effectively solving the agglomeration problem. This burner is designed in a triangular shape for production. By adjusting the ratio of natural gas and auxiliary combustion gas in each burner, as well as the amount of glass powder particles added, the energy consumption per unit product can be reduced. Furthermore, compared to a single burner, increasing the amount of glass powder particles to a certain level will cause the burner to shut down. This burner distributes glass powder particles into three sub-burners, which can increase the amount of powder, improve thermal efficiency, and enhance productivity.

[0008] To achieve better performance from this burner, the preferred solution is as follows:

[0009] Preferably, the inner wall of the lower pipe near the first flange is provided with an inwardly extending throttling structure.

[0010] When the throttling structure on the inner wall of the lower tube is used in this burner, it is equivalent to the glass powder particles passing through a throttling orifice when they move upward. The throttling orifice enhances the anti-interference ability of the material flow. Attached Figure Description

[0011] Figure 1 This is a top view of the second flange in this burner.

[0012] Figure 2 This is a cross-sectional view of the material piping in this burner. Detailed Implementation

[0013] See Figure 1 , Figure 2A bottom-feed burner includes a combustion chamber. Three material pipes 2 are arranged in a triangular pattern on the lower side of the combustion chamber via a horizontally arranged second flange 1. The material pipes 2 are vertically arranged, open at the top and closed at the bottom. A vertically arranged rotating shaft 21 is installed inside each material pipe 2, coaxial with the material pipe 2. A motor 22 is located below each material pipe 2, with its output shaft coaxially connected to the rotating shaft 21. A horizontally arranged first flange 3 is located on the circumferential outer side of the lower part of the material pipe 2. Lan 3 divides the material pipeline 2 into an upper pipe body 23 and a lower pipe body 24. Near the bottom of the lower pipe body 24, a feed pipe 25 communicating with it is provided. At the position of the rotating shaft 21, corresponding to the portion inside the upper pipe body 23, several blades 211 are arranged at intervals. A natural gas pipeline 4 and a combustion-supporting pipeline 5 are coaxially sleeved around the upper pipe body 23 from the inside out. The diameters of the upper pipe body 23, natural gas pipeline 4, and combustion-supporting pipeline 5 increase sequentially. The upper side of the natural gas pipeline 4 is flush with the material pipeline 2, and the lower part of the natural gas pipeline 4 forms a space between it and the upper pipe body 23. Within the first annular gas cavity 41 for containing natural gas, the upper and middle diameters of the natural gas pipeline 4 narrow in the height direction. A first annular gap 42 for transporting natural gas is formed between the upper and middle sections of the natural gas pipeline 4 and the upper pipe body 23. The upper side of the combustion-supporting pipeline 5 extends beyond the upper sides of the material pipeline 2 and the natural gas pipeline 4 and connects to the lower side of the second flange 1. A second annular gas cavity 51 for containing combustion-supporting gas is formed between the middle section of the combustion-supporting pipeline 5 and the middle section of the natural gas pipeline 4 in the height direction. The upper inner diameter of the combustion-supporting pipeline 5 narrows. A second annular gap 52 for transporting combustion-supporting gas is formed between the upper part of the gas pipeline 5 and the upper part of the natural gas pipeline 4. A number of natural gas inlet pipes 43 are provided on the outer circumferential wall of the first annular gas chamber 41. Each natural gas inlet pipe 43 is arranged radially along the natural gas pipeline 4. One end of each natural gas inlet pipe 43 is connected to the first annular gas chamber 41, and the other end of each natural gas inlet pipe 43 extends radially out of the combustion-supporting gas pipeline 5. A number of combustion-supporting gas inlet pipes 53 are provided on the outer circumferential wall of the second annular gas chamber 51. Each combustion-supporting gas inlet pipe 53 is connected radially to the inside and outside of the combustion-supporting gas pipeline 5.

[0014] The inner wall of the lower pipe body 24, near the first flange 3, is provided with an inwardly extending throttling structure 6.

[0015] How to use and the advantages of this burner:

[0016] Natural gas enters the first annular gas chamber 41 through the natural gas inlet pipe 43. The first annular gas chamber 41 stabilizes the pressure of the natural gas, which then exits upward through the first annular gap 42 and enters the combustion chamber. Auxiliary combustion gas enters the second annular gas chamber 51 through the dry auxiliary combustion gas inlet pipe 53, and then enters the combustion chamber through the second annular gap 52. Natural gas and auxiliary combustion gas are ignited in a specific ratio. Both the auxiliary combustion gas and natural gas have annular gaps to enhance the uniformity and stability of gas flow. Glass powder raw material enters the material pipeline 2 through the feed pipe 25 and moves upward. The motor 22 drives the rotating shaft 21 to rotate the blades 211. The rotating blades 211 disperse the glass powder raw material, allowing it to spheroidize before entering the sintering furnace from the combustion chamber, effectively solving the agglomeration problem. This burner is designed in a triangular shape for production. By adjusting the ratio of natural gas and auxiliary combustion gas in each burner, as well as the amount of glass powder particles added, the energy consumption per unit product can be reduced. Furthermore, compared to a single burner, increasing the amount of glass powder particles to a certain level will cause the burner to shut down. This burner distributes glass powder particles into three sub-burners, which can increase the amount of powder, improve thermal efficiency, and enhance productivity.

[0017] The throttling structure 6 on the inner wall of the lower tube 24, when used in this burner, is equivalent to the glass powder particles passing through a throttling orifice when moving upwards. The throttling orifice enhances the anti-interference ability of the material flow.

Claims

1. A bottom-feed burner, comprising a combustion chamber, wherein a material pipe is arranged vertically on the lower side of the combustion chamber via a horizontally arranged second flange, and the upper side of the material pipe is open, characterized in that: Three material pipes are arranged in a triangular pattern on the lower side of the combustion chamber via a horizontally arranged second flange. The lower ends of the material pipes are sealed. A vertically arranged rotating shaft is located inside each material pipe, coaxial with the pipe. A motor is located below the material pipe, with its output shaft coaxially connected to the rotating shaft. A horizontally arranged first flange is located on the outer circumference of the lower part of the material pipe, dividing it into an upper and lower pipe body. A feed pipe communicating with the lower pipe body is located near its bottom. Several blades are arranged vertically at intervals within the upper pipe body, corresponding to the rotating shaft. A natural gas pipe and a combustion-supporting pipe are coaxially fitted around the outer circumference of the upper pipe body from the inside out. The diameters of the upper pipe body, natural gas pipe, and combustion-supporting pipe increase sequentially. The upper side of the natural gas pipe is flush with the material pipe. A first annular gas chamber for containing natural gas is formed between the lower part of the natural gas pipe and the upper pipe body. The height of the natural gas pipe is... The diameter of the upper and middle sections of the gas pipeline narrows. A first annular gap for transporting natural gas is formed between the upper and middle sections of the natural gas pipeline and the upper pipe body. The upper side of the gas-supporting pipeline extends beyond the upper side of the material pipeline and the natural gas pipeline and connects to the lower side of the second flange. A second annular gas cavity for accommodating gas-supporting gas is formed between the middle section of the gas-supporting pipeline and the middle section of the natural gas pipeline in the height direction. The inner diameter of the upper part of the gas-supporting pipeline narrows. A second annular gap for transporting gas-supporting gas is formed between the upper part of the gas-supporting pipeline and the upper part of the natural gas pipeline. Several natural gas inlet pipes are provided on the outer circumferential wall of the first annular gas cavity. Each natural gas inlet pipe is arranged radially along the natural gas pipeline. One end of each natural gas inlet pipe is connected to the first annular gas cavity, and the other end of each natural gas inlet pipe extends radially out of the gas-supporting pipeline. Several gas-supporting gas inlet pipes are provided on the outer circumferential wall of the second annular gas cavity. Each gas-supporting gas inlet pipe is connected radially to the inside and outside of the gas-supporting pipeline.

2. A bottom-feed burner according to claim 1, characterized in that: The inner wall of the lower pipe body near the first flange is provided with an inwardly extending throttling structure.

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