Bead forming furnace for generating fine glass beads

Abstract

The invention discloses a bead forming furnace for generating glass beads, and relates to the technical field of bead forming furnaces, the bead forming furnace comprises a support frame and a boiler liner with an interlayer, the top of the support frame is provided with a steam tank, the bottom of the steam tank is communicated with an ascending pipe, the boiler liner with the interlayer is located at the bottom of the ascending pipe, and the ascending pipe is communicated with the steam tank. Combustors are annularly distributed in the boiler inner container with the interlayer, and a settling bead cooling section is installed on the outer portion of the bottom of the boiler inner container with the interlayer. According to the bead forming furnace for generating the glass fine beads, through a double-layer steel plate water circulation structure with the interlayer boiler inner container, the problem that a large amount of heat of a traditional refractory material furnace is lost is solved, heat conducted by the furnace container is absorbed by water in the interlayer and converted into steam, and the steam is conveyed to a steam tank to be stored through an ascending pipe and then supplied to a downstream production link through an external pipe; the gradient utilization of energy is realized, the heat loss is directly reduced by the design, and the comprehensive energy consumption of the equipment can be reduced by combining a closed-loop water replenishing system formed by the water pump, the upper water pipe and the lower water pipe.

Description

Technical Field

[0001] This invention relates to the field of bead-forming furnace technology, specifically to a bead-forming furnace for producing glass beads. Background Technology

[0002] As a new type of functional material, glass beads are widely used in road reflective markings, plastic and rubber fillers, paint additives and aerospace fields due to their advantages of low specific gravity, good wear resistance and good dispersibility. Bead forming furnace is the core equipment for their production.

[0003] Existing glass bead forming furnaces mostly use electric heating, which has low temperature control accuracy, cannot adjust the heating stroke of glass sand as needed, makes it difficult to accurately control the particle size of fine beads, and results in poor product consistency. The furnace body is mostly a rectangular column structure, and the furnace wall is made of a single refractory material. Although it has high temperature resistance, its high thermal conductivity makes it easy to lose a lot of heat. Moreover, there is no waste heat recovery design, resulting in low energy utilization and significantly increasing production costs.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed a bead-forming furnace for generating glass beads. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bead-forming furnace for generating glass beads, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a glass bead forming furnace, comprising a support frame and a jacketed boiler liner, wherein a steam tank is installed on the top of the support frame and a riser pipe is connected to the bottom of the steam tank, the jacketed boiler liner is located at the bottom of the riser pipe, burners are arranged in a ring inside the jacketed boiler liner, and a settling bead cooling section is installed on the outside of the bottom of the jacketed boiler liner, a bead collecting port is provided at the bottom of the settling bead cooling section, a feeding box is installed above the jacketed boiler liner, a water inlet pipe is provided on the top of the steam tank, and a water pump is installed at the bottom of the water inlet pipe.

[0007] Furthermore, the inner liner of the jacketed boiler is a double-layer welded steel plate structure, and the inner liner of the jacketed boiler forms a closed water circulation channel.

[0008] Furthermore, the burners are distributed in multiple layers at equal intervals along the axial direction of the jacketed boiler liner, and each layer of burners sprays flames obliquely downwards.

[0009] Furthermore, the inner liner of the jacketed boiler is cylindrical, and the inner diameter of the inner liner is set to 1 meter.

[0010] Furthermore, the settling bead cooling section has a conical cylindrical structure, and the fine bead collection port and the settling bead cooling section are distributed in a one-to-one correspondence.

[0011] Furthermore, one end of the settling bead cooling section is connected to an induced draft fan, and a negative pressure guide pipe is installed on the top of the induced draft fan.

[0012] Furthermore, a finished product collection chamber is installed at the bottom of the negative pressure guide pipe, and the negative pressure guide pipe has a "U" shaped structure.

[0013] Furthermore, the jacketed boiler liner and the settling bead cooling section are distributed in a one-to-one correspondence, and the diameter of the jacketed boiler liner is smaller than the diameter of the settling bead cooling section.

[0014] Furthermore, the top of the steam tank is provided with an external pipe, and three sets of external pipes are installed.

[0015] Furthermore, a sedimentation bead forming chamber is provided on the inner side of the top of the sedimentation bead cooling section, and the sedimentation bead forming chamber is located on both sides of the bottom end of the steam tank, and a downcomer pipe is connected to the middle of the bottom end of the steam tank.

[0016] This invention provides a bead-forming furnace for producing glass beads, which has the following beneficial effects:

[0017] 1. This glass bead forming furnace, through a double-layer steel plate water circulation structure with a jacketed boiler inner liner, solves the problem of large heat loss in traditional refractory furnaces. The heat conducted by the furnace liner is absorbed by the water in the jacket and converted into steam, which is then transported to the steam tank for storage via riser pipes and supplied to downstream production stages through external pipes, realizing the cascade utilization of energy. This design directly reduces heat loss. Combined with the closed-loop water replenishment system formed by the water pump and water supply pipe, the overall energy consumption of the equipment can be reduced, significantly compressing product production costs.

[0018] 2. The glass bead forming furnace uses a cylindrical jacketed boiler liner with an inner diameter of 1 meter, which avoids the "sandwich" defect caused by insufficient material temperature in the center of the traditional rectangular column furnace, ensuring uniform heating of the glass sand. At the same time, the multi-layered annular burners spray flames obliquely downwards. By controlling the number of burner layers, the residence distance of the glass sand in the high-temperature zone can be precisely adjusted, realizing controllable production across the entire particle size range from microbeads to coarse beads. This is combined with a natural sedimentation cooling process using a sedimentation bead forming chamber, a conical sedimentation bead cooling section, and a downcomer.

[0019] 3. The glass bead forming furnace adopts a negative pressure collection system composed of a negative pressure guide pipe and an induced draft mechanism, combined with a U-shaped finished product collection bin, to achieve efficient collection and zero-loss recovery of glass beads. The automatic temperature control function of the burner and the modular steam output of the steam tank enable the equipment to quickly switch between production modes of products with different particle sizes. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a bead-forming furnace for producing glass beads according to the present invention;

[0021] Figure 2 This is a front view schematic diagram of a bead-forming furnace for generating glass beads according to the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of a glass bead forming furnace according to the present invention, taken from another perspective.

[0023] Figure 4 This is a side view of a bead-forming furnace for producing glass beads according to the present invention.

[0024] Figure 5 This is a top view schematic diagram of a bead-forming furnace for producing glass beads according to the present invention;

[0025] Figure 6 This is a schematic diagram of the principle flow structure of a bead-forming furnace for generating glass beads according to the present invention.

[0026] In the diagram: 1. Support frame; 2. Steam tank; 3. Jacketed boiler inner liner; 4. Burner; 5. Feed box; 6. Fine bead collection port; 7. Ascending pipe; 8. Settling bead chamber; 9. Exhaust fan; 10. Negative pressure guide pipe; 11. Finished product collection bin; 12. Water pump; 13. Water inlet pipe; 14. Settling bead cooling section; 15. External pipe; 16. Downcomer pipe. Detailed Implementation

[0027] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0028] like Figures 1-5As shown, the present invention provides a technical solution: a bead-forming furnace for producing glass beads, comprising a support frame 1, a steam tank 2, a jacketed boiler liner 3, a burner 4, a feeding box 5, a bead collection port 6, a riser pipe 7, a settling bead-forming chamber 8, an induced draft fan 9, a negative pressure guide pipe 10, a finished product collection bin 11, a water pump 12, a water inlet pipe 13, a settling bead cooling section 14, an external pipe 15, and a downcomer pipe 16. The steam tank 2 is installed on the top of the support frame 1, and the bottom of the steam tank 2 is connected to the riser pipe 7. The top of tank 2 is equipped with an external pipe 15, and three sets of external pipes 15 are installed. The jacketed boiler inner liner 3 is located at the bottom of the riser pipe 7. The jacketed boiler inner liner 3 has a cylindrical structure and an inner diameter of 1 meter. The jacketed boiler inner liner 3 has a double-layer welded steel plate structure, and the internal jacket of the jacketed boiler inner liner 3 forms a closed water circulation channel. The water circulation channel is connected to the water pump 12 for water replenishment through the water inlet pipe 13. At the same time, the water circulation channel is connected to the steam tank 2 through the riser pipe 7. The inner chamber 3 contains annularly distributed burners 4, and a settling bead cooling section 14 is installed on the outer bottom of the inner chamber 3. Multiple layers of burners 4 are equidistantly distributed along the axial direction of the inner chamber 3, with each layer of burners 4 spraying flames diagonally downwards. A fine bead collection port 6 is provided at the bottom of the settling bead cooling section 14. A feed box 5 is installed above the inner chamber 3. A water inlet pipe 13 is installed at the top of the steam tank 2, and a water pump 12 is installed at the bottom of the water inlet pipe 13. Water flows through the inner chamber 3... The double-layer steel plate water circulation structure of the inner liner 3 solves the problem of large heat loss in traditional refractory furnaces. The heat conducted by the furnace liner is absorbed by the water in the interlayer and converted into steam, which is transported to the steam tank 2 for storage through the riser pipe 7, and then supplied to the downstream production process through the external pipe 15, realizing the cascade utilization of energy. This design directly reduces heat loss. Combined with the closed-loop water replenishment system consisting of the water pump 12, the water inlet pipe 13 and the water outlet pipe 16, the overall energy consumption of the equipment can be reduced, significantly compressing the product production cost.

[0029] like Figure 2-6As shown, the settling bead cooling section 14 has a conical cylindrical structure, and the fine bead collection port 6 is distributed one-to-one with the settling bead cooling section 14. The jacketed boiler inner liner 3 is distributed one-to-one with the settling bead cooling section 14, and the diameter of the jacketed boiler inner liner 3 is smaller than the diameter of the settling bead cooling section 14. A settling bead forming cavity 8 is provided on the inner side of the top of the settling bead cooling section 14, and the settling bead forming cavity 8 is located on both sides of the bottom end of the steam tank 2. A downcomer pipe 16 is connected to the middle of the bottom end of the steam tank 2. The use of a cylindrical jacketed boiler inner liner 3 with an inner diameter of 1 meter avoids the "sandwich" defect caused by insufficient material temperature in the center of the traditional rectangular column furnace, ensuring uniform heating of the glass sand. At the same time, the multi-layered annularly distributed burners 4 spray flames obliquely downwards. By controlling the number of layers of burners 4, the temperature can be precisely adjusted. The glass sand's residence time in the high-temperature zone is shortened, enabling controllable production across the entire particle size range, from microspheres to coarse spheres. Combined with the natural settling cooling process of the settling bead chamber 8, the conical settling bead cooling section 14, and the downcomer pipe 16, one end of the settling bead cooling section 14 is connected to an induced draft fan 9. A negative pressure guide pipe 10 is installed at the top of the induced draft fan 9, and a finished product collection chamber 11 is installed at the bottom of the negative pressure guide pipe 10. The negative pressure guide pipe 10 has a "U"-shaped structure. The negative pressure collection system formed by the negative pressure guide pipe 10 and the induced draft fan 9, combined with the "U"-shaped finished product collection chamber 11, achieves efficient collection and zero-loss recovery of fine glass beads. The automatic temperature control function of the burner 4 and the modular steam output of the steam tank 2 allow the equipment to quickly switch between production modes for products of different particle sizes.

[0030] In summary, as Figures 1-6As shown, this glass bead forming furnace adopts a modular design. A single jacketed boiler liner 3 can operate independently, or one or more jacketed boiler liner 3s can be connected in series / parallel to achieve multi-furnace collaborative production. Water pump 12 replenishes water to the double-layered steel plate sandwiched closed water circulation channel of the jacketed boiler liner 3 through water inlet pipe 13, serving as a waste heat recovery storage medium. Simultaneously, glass fine sand is conveyed to the feeding box 5 via external conveying equipment and falls evenly into the internal cavity of the jacketed boiler liner 3. Utilizing the 1-meter inner diameter cylindrical structure of the jacketed boiler liner 3, the formation of a "sandwich" in the center due to insufficient temperature is avoided. Multiple layers of burners 4 are evenly distributed in a ring inside, with each layer of burners 4 angled downwards. The system injects flames and controls the number of layers of burners 4 that are activated. Multiple temperature sensors on the inner wall of the jacketed boiler liner 3 continuously collect furnace temperature data. Combined with the uniform temperature field characteristics of the 1-meter inner diameter of the cylindrical furnace liner, the system can accurately determine whether the temperature distribution in the high-temperature zone matches a preset threshold. The control system compares the real-time temperature with the preset threshold and automatically executes two types of adjustments: layer adjustment and power adjustment. During layer adjustment, if the temperature is below the threshold, the number of activated burner layers 4 is increased to expand the high-temperature zone and extend the heating "stroke" of the glass sand; if the temperature is above the threshold, the number of activated layers is reduced to shorten the heating time. Power adjustment: For the activated burners 4, the system dynamically adjusts the gas flow rate and combustion air ratio to precisely control the flame of a single burner 4. Temperature control enables precise regulation of the furnace temperature, allowing for accurate adjustment of the temperature field and the "journey" of the glass beads within the furnace cavity. The more layers are opened, the longer the glass beads remain in the high-temperature zone and the more fully they are heated, resulting in larger glass beads. Conversely, fewer layers result in smaller beads, thus achieving precise control over products of different particle sizes. The molten glass then naturally settles within the jacketed boiler inner liner 3, transitioning through the bead-forming cavity 8 before entering the lower bead cooling section 14, a conical cylindrical structure. Within this conical cavity, the molten glass gradually cools and solidifies, ultimately forming glass beads. Then, the induced draft fan 9 starts, creating a stable negative pressure environment within the bead cooling section 14 through the "U"-shaped structure of the negative pressure guide pipe 10, guiding the glass beads towards the bead collection area. The water moves and collects directly from the outlet 6. Some of the fine beads that are lifted by the airflow will settle and be recovered in the finished product collection chamber 11 of the "U"-shaped negative pressure guide pipe 10, ensuring that the finished product is not lost. Finally, in the double-layer steel plate sandwich of the inner liner of the jacketed boiler 3, the water continuously absorbs the heat conducted by the furnace and generates steam. The steam enters the steam tank 2 for storage through the riser pipe 7. The three sets of external pipes 15 on the top of the steam tank 2 can transport the steam to downstream production links such as drying and heating for reuse, which greatly reduces energy waste. When the water in the sandwich is insufficient, the water pump 12 automatically replenishes water through the water inlet pipe 13, and the water outlet pipe 16 introduces water into the sedimentation bead chamber 8 and the sedimentation bead cooling section 14 area to maintain the stable operation of the water circulation channel, and finally achieve the dual optimization of heat recovery and production cost.

[0031] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A bead-forming furnace for producing glass beads, comprising a support frame (1) and a jacketed boiler liner (3), characterized in that: A steam tank (2) is installed on the top of the support frame (1), and a riser pipe (7) is connected to the bottom of the steam tank (2). The inner liner of the jacketed boiler (3) is located at the bottom of the riser pipe (7). Burners (4) are distributed in a ring inside the inner liner of the jacketed boiler (3). A settling bead cooling section (14) is installed on the outside of the bottom of the inner liner of the jacketed boiler (3). A fine bead collection port (6) is provided at the bottom of the settling bead cooling section (14). A feed box (5) is installed above the inner liner of the jacketed boiler (3). A water inlet pipe (13) is provided on the top of the steam tank (2), and a water pump (12) is installed at the bottom of the water inlet pipe (13).

2. The bead-forming furnace for producing glass beads according to claim 1, characterized in that: The inner liner of the jacketed boiler (3) is a double-layer steel plate welded structure, and the inner liner of the jacketed boiler (3) forms a closed water circulation channel through the internal interlayer.

3. The bead-forming furnace for producing glass beads according to claim 1, characterized in that: The burners (4) are distributed in multiple layers at equal intervals along the axial direction of the inner liner (3) of the jacketed boiler, and each layer of burners (4) sprays flames obliquely downwards.

4. The bead-forming furnace for producing glass beads according to claim 1, characterized in that: The inner liner (3) of the jacketed boiler is cylindrical, and the inner diameter of the inner liner (3) is set to 1 meter.

5. The bead-forming furnace for producing glass beads according to claim 1, characterized in that: The settling bead cooling section (14) has a conical cylindrical structure, and the fine bead collection port (6) and the settling bead cooling section (14) are distributed in a one-to-one correspondence.

6. The bead-forming furnace for producing glass beads according to claim 5, characterized in that: One end of the settling bead cooling section (14) is connected to an induced draft fan (9), and a negative pressure guide pipe (10) is installed on the top of the induced draft fan (9).

7. The bead-forming furnace for producing glass beads according to claim 6, characterized in that: The bottom of the negative pressure guide pipe (10) is equipped with a finished product collection chamber (11), and the negative pressure guide pipe (10) has a "U" shaped structure.

8. The bead-forming furnace for producing glass beads according to claim 1, characterized in that: The jacketed boiler liner (3) and the settling bead cooling section (14) are distributed in a one-to-one correspondence, and the diameter of the jacketed boiler liner (3) is smaller than the diameter of the settling bead cooling section (14).

9. A bead-forming furnace for producing glass beads according to claim 1, characterized in that: The top of the steam tank (2) is provided with an external pipe (15), and three sets of external pipes (15) are installed.

10. A bead-forming furnace for producing glass beads according to claim 9, characterized in that: The settling bead cooling section (14) has a settling bead chamber (8) on the inner side of the top, and the settling bead chamber (8) is located on both sides of the bottom end of the steam tank (2), and a downcomer pipe (16) is connected to the middle of the bottom end of the steam tank (2).

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