Fluidized bed roaster capable of strengthening cooling in roaster

Abstract

The utility model discloses a fluidized bed roaster capable of strengthening cooling in the roaster, which is characterized in that a cooling unit with a special structure is arranged in a roaster body, so that effective cooling can be realized. Specifically, according to different combustion conditions and intensity reflected in the furnace, the number of the straight pipe sections of the polygonal ring pipe can be controlled so as to control the density of the inclined pipes, in addition, the thickness of the polygonal ring pipe and the thickness of the inclined pipes can be controlled, and the optimal cooling effect can be achieved. And in addition, through the arrangement of the flow dividing barrel, input cooling water can be effectively divided into high-temperature steam output and high-heat warm water output, and effective utilization of waste heat can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of fluidized bed roasters, in particular to a fluidized bed roaster for strengthening internal cooling in the furnace. Background Art

[0002] The fluidized bed roaster is an important high-temperature treatment equipment in industrial production, and its internal cooling system in the furnace is crucial for ensuring the normal operation of the equipment. The main function of the internal cooling in the furnace is to control the temperature in the furnace, avoid over-roasting or melting of the materials, and at the same time reduce the temperature of the furnace body and refractory materials, reduce thermal stress and thermal fatigue, so as to extend the service life of the equipment. A good internal cooling system in the furnace can recover part of the heat energy, improve the thermal efficiency of the entire roasting process, and reduce energy consumption.

[0003] However, if the internal cooling in the furnace is not timely or sufficient, a series of problems will occur. First of all, in a high-temperature environment, the furnace body and refractory materials are easily damaged due to thermal stress, resulting in equipment failures or even shutdowns. Secondly, uneven or over-roasted material roasting will affect the product quality, increase the difficulty of subsequent processing, and reduce production efficiency. In addition, without an effective cooling system, the heat in the furnace dissipates quickly, and more energy is required to maintain the furnace temperature, resulting in increased energy consumption. More seriously, improper temperature control may trigger safety accidents such as fires and explosions, posing a threat to the safety of personnel and equipment.

[0004] Therefore, designing and maintaining an effective internal cooling system in the furnace is a key link in the management of fluidized bed roasters. It can not only improve production efficiency and product quality, but also ensure the safety of equipment and personnel, reduce energy consumption and environmental pollution. In the prior art, the utility model with the publication number of CN220708064U discloses a cooling structure of a fluidized bed roaster, but the cooling of this cooling structure is simple. When the fluidized bed roaster is in full-load high-load mineral processing, it is difficult for the above structure to ensure the effective cooling of the fluidized bed roaster. Summary of the Utility Model

[0005] In order to solve the problems existing in the prior art, the purpose of the utility model is to disclose a fluidized bed roaster for strengthening internal cooling in the furnace. By designing and improving the cooling structure inside the furnace body, while ensuring the internal cooling effect in the furnace, the heat is fully utilized and thermal steam can be generated for other processes.

[0006] To achieve the above effects, the present application discloses a fluidized roasting furnace with enhanced in-furnace cooling, which includes a furnace body. The bottom of the furnace body is connected to an air supply pipe. An air distribution plate is arranged at a position in the furnace body that is higher than the vertical height of the air supply pipe. The furnace body above the air distribution plate gradually expands upward to form a fluidized bed. A supplementary air pipe is connected to the side of the furnace body above the fluidized bed. The interior of the furnace body above the supplementary air pipe is a roasting space. A cooling unit 7 is arranged in the fluidized bed. The cooling unit includes a cooling water pipe extending from the outside of the furnace body to the inside of the furnace body. The cooling water pipe supports and is connected to a regular polygon ring pipe. The polygon ring pipe is composed of n straight pipe segments with the same length. Among them, an inclined pipe is led outwards at the intersection position of any two adjacent straight pipe segments. The inclined pipe extends obliquely upward relative to the inside of the polygon ring pipe and converges into a shunt cylinder. The bottom of the shunt cylinder is directly connected to a water return pipe. A steam output pipe is sleeved inside the water return pipe. The end of the steam output pipe is fixed in the closed space inside the shunt cylinder and the upper cover, and the end of the steam output pipe is higher than the upper edge of the shunt cylinder.

[0007] Further, the steam output pipe is supported and fixed in the shunt cylinder by a support short rod.

[0008] Further, the horizontal included angle of the inclined pipe relative to the polygon ring pipe is 5° - 15°.

[0009] Further, the water return pipe passes through the furnace body and is connected to a cooling water tank outside the furnace body. The steam output pipe passes through the upper part of the cooling water tank and is communicated with a steam pipeline.

[0010] Further, the water return pipe is communicated with the upper side of the cooling water tank.

[0011] Further, a feeding unit is also connected to the furnace body.

[0012] Further, a furnace gas outlet is also provided at the top of the furnace body, and a slag receiving hopper is arranged at the bottom of the furnace body.

[0013] Further, an ignition burner is also arranged on the side of the furnace body.

[0014] The beneficial effects of the present utility model include:

[0015] The present application discloses a fluidized roasting furnace with enhanced in-furnace cooling. By arranging a cooling unit with a special structure inside the furnace body, through the setting of this unit, effective temperature reduction can be achieved. Specifically, for different combustion conditions and the intensity of the reaction inside the furnace, the number of straight pipe segments of the polygon ring pipe can be controlled to control the density of the inclined pipes. In addition, the thickness of the polygon ring pipe and the inclined pipes can be controlled to achieve the best cooling effect.

[0016] In addition, through the setting of the flow dividing cylinder, the input cooling water can be effectively divided, and separated into high-temperature steam output and high-temperature warm water output respectively, so as to realize the effective utilization of waste heat. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the cooling unit of the present invention.

[0021] Figure 4 It is a schematic top view of the cooling unit of the present invention.

[0022] Figure 5 For the present invention Figure 4 Schematic cross-sectional view.

[0023] Figure 6 For the present invention Figure 5 Schematic enlarged view of the local structure.

[0024] Figure 7 It is a schematic diagram of the internal structure of the flow dividing cylinder of the present invention.

[0025] Wherein: 1. furnace body, 2. air supply pipe, 3. air distribution plate, 4. fluidized bed, 5. make-up air pipe, 6. roasting space, 7. cooling unit, 8. water return pipe, 9. steam output pipe, 10. cooling water tank, 11. feeding unit, 12. furnace gas outlet, 13. slag receiving hopper, 14. ignition burner, 71. cooling water pipe, 72. regular polygon ring pipe, 73. straight pipe section, 74. inclined pipe, 75. flow dividing cylinder, 76. upper cover, 77. support short rod. Detailed Embodiments

[0026] The following will further elaborate on the specific embodiments of the present invention in the form of combining with the drawings. However, the following embodiments only list the relatively preferred embodiments, which only play an explanatory role to help understand the present invention and cannot be construed as a limitation to the present invention.

[0027] Reference Figure 1-7 , a fluidized bed roaster for enhancing in-furnace cooling, comprising a furnace body 1, the bottom of the furnace body is connected to an air supply pipe 2, an air distribution plate 3 is arranged at a position in the furnace body higher than the vertical height of the air supply pipe, the furnace body above the air distribution plate expands gradually upward to form a fluidized bed 4, a supplementary air pipe 5 is connected to the side of the furnace body above the fluidized bed, the interior of the furnace body above the supplementary air pipe is a roasting space 6, a cooling unit 7 is arranged in the fluidized bed 4, the cooling unit comprises a cooling water pipe 71 extending from the outside of the furnace body to the inside of the furnace body, the cooling water pipe supports and is connected to a regular polygon ring pipe 72, the polygon ring pipe 72 is composed of n straight pipe segments 73 with the same length, where 8 ≤ n ≤ 24, an inclined pipe 74 is led outwards at the intersection position of any two adjacent straight pipe segments 73, the inclined pipe extends obliquely upwards relative to the inside of the polygon ring pipe 72 and converges into a shunt cylinder 75, the bottom of the shunt cylinder is directly connected to a water return pipe 8, a steam output pipe 9 is sleeved inside the water return pipe 8, the end of the steam output pipe 9 is fixed in the sealed space in the shunt cylinder 75 and the upper cover 76, and the end of the steam output pipe is higher than the upper edge of the shunt cylinder.

[0028] The fluidized bed roaster is an efficient industrial roasting equipment, and its core structure includes a furnace body 1, which serves as the basis of the entire equipment and is used to accommodate the roasting process. The bottom of the furnace body is connected to an air supply pipe 2, which is responsible for conveying air into the furnace to support the roasting of materials. An air distribution plate 3 is installed at a position in the furnace body higher than the air supply pipe to ensure that the air sent in can be evenly distributed, thereby ensuring the uniformity of material roasting. After passing through the distribution plate, the air enters the fluidized bed 4, which is an area formed by the furnace body expanding gradually upward, and the materials are roasted in a fluidized state here. In order to further improve the roasting efficiency, a supplementary air pipe 5 is connected to the side of the furnace body above the fluidized bed to supplement air and ensure sufficient oxygen supply in the furnace. The interior of the furnace body above the supplementary air pipe constitutes a roasting space 6, which is the main place for material roasting.

[0029] In order to ensure the control of the temperature in the furnace and prevent overheating, a cooling unit 7 is particularly arranged in the fluidized bed. The unit consists of a cooling water pipe 71 and a regular polygon ring pipe 72. The cooling water pipe extends from the outside of the furnace body to the inside and is connected to the regular polygon ring pipe. The latter is composed of multiple straight pipe segments with the same length. Inclined pipes are led outwards at the intersection positions of these straight pipe segments to achieve uniform distribution and flow of the cooling water. This design not only improves the roasting efficiency but also ensures the stability of the temperature in the furnace, thereby optimizing the entire roasting process.

[0030] According to different combustion conditions and the intensity of the reaction in the furnace, the number of straight pipe segments of the polygon ring pipe can be controlled to achieve the control of the density of the inclined pipes. In addition, the thickness of the polygon ring pipe and the inclined pipes can be controlled to achieve the best cooling effect.

[0031] In addition, through the setting of the flow dividing cylinder, the input cooling water can be effectively divided, separated into high-temperature steam output and high-temperature warm water output respectively, and the effective utilization of waste heat can be realized.

[0032] As a preferred technical solution, the steam output pipe 9 is supported and fixed in the flow dividing cylinder 75 through a support short rod 77. This can ensure the stability of the steam output pipe in the water return pipe.

[0033] Preferably, the horizontal included angle of the inclined pipe 74 relative to the polygonal ring pipe is 5°-15°. An angle that is too large or too small is not conducive to circulation, and a certain inclination angle is beneficial to the rise of steam inside the inclined pipe.

[0034] Preferably, refer to Figure 5 . The water return pipe 8 passes through the furnace body 1 and is connected to the cooling water tank 10 outside the furnace body. The steam output pipe passes through the upper part of the cooling water tank and communicates with the steam pipeline. The water return pipe 8 communicates with the upper side of the cooling water tank. In this way, not only is it convenient to separate the returned water and steam, but also the steam will not be cooled due to the long-term contact between the returned water and the steam.

[0035] Generally speaking, for a fluidized bed roasting furnace, the air supply pipe and the air supply supplement pipe are respectively communicated with the air source. A feeding unit 11 is also connected to the furnace body. The inlet height of the feeding unit is between the heights of the air inlet pipe and the air supply supplement pipe. A furnace gas outlet 12 is also provided at the top of the furnace body, and a slag receiving hopper 13 is arranged at the bottom of the furnace body. An ignition burner 14 is also provided on the side of the furnace body.

[0036] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A fluidized bed roasting furnace with enhanced cooling in the furnace, characterized in that: The invention comprises a furnace body (1), wherein the bottom of the furnace body is connected to an air supply pipe (2), an air distribution plate (3) is arranged in the furnace body at a position higher than the vertical height of the air supply pipe, the furnace body above the air distribution plate gradually expands upward to form a boiling layer (4), the furnace body side above the boiling layer is connected to an air supply pipe (5), the furnace body above the air supply pipe is a roasting space (6), a cooling unit (7) is arranged in the boiling layer (4), the cooling unit comprises a cooling water pipe (71) extending from the outside of the furnace body to the inside of the furnace body, the cooling water pipe is supported and connected to a regular polygonal ring pipe (72), the polygonal ring pipe (7 2) It is composed of n straight pipe sections (73) of the same length, wherein 8≤n≤24, and an inclined pipe (74) is led outward from the intersection of any two adjacent straight pipe sections (73), and the inclined pipe extends obliquely relative to the upper part of the interior of the polygonal annular tube (72) and converges into a diverter tube (75), the bottom of the diverter tube is directly connected to a water return pipe (8), and a steam output pipe (9) is sheathed inside the water return pipe (8), and the end of the steam output pipe (9) is fixed in the closed space between the diverter tube (75) and the upper cover (76), and the end of the steam output pipe is higher than the upper edge of the diverter tube.

2. A fluidized bed roasting furnace with enhanced furnace cooling according to claim 1, characterized in that: The steam output pipe (9) is supported and fixed in the diversion tube (75) by a supporting short rod (77).

3. The fluidized bed roasting furnace with enhanced internal cooling according to claim 1, characterized in that: The horizontal angle between the inclined tube (74) and the polygonal annular tube is 5°-15°.

4. The fluidized bed roasting furnace with enhanced internal cooling according to claim 1, characterized in that: The water return pipe (8) passes through the furnace body (1) and is connected to a cooling water pool (10) outside the furnace body, and the steam output pipe passes through the upper part of the cooling water pool and is connected to a steam pipeline.

5. The fluidized bed roasting furnace with enhanced internal cooling according to claim 4, characterized in that: The water return pipe (8) is in communication with the upper side of the cooling water pool.

6. The fluidized bed roasting furnace with enhanced internal cooling according to claim 4, characterized in that: The furnace body is also connected to a feeding unit (11), and the entrance height of the feeding unit is between the heights of the air supply pipe and the air supply pipe.

7. The fluidized bed roasting furnace with enhanced internal cooling according to claim 1, characterized in that: The top of the furnace body is also provided with a furnace gas outlet (12), and the bottom of the furnace body is provided with a slag receiving hopper (13).

8. The fluidized bed roasting furnace with enhanced internal cooling according to claim 1, characterized in that: An ignition burner (14) is also provided on the side of the furnace body.

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