Fluidized calcining system

Abstract

The utility model discloses a fluidized calcining system, which comprises a calcining furnace, a fluidized bed, a fluidized bed, a fluidized bed, a fluidized bed, a fluidized bed, a fluidized bed, a fluidized bed and a fluidized bed, and is characterized in that the bottom is provided with a hot air inlet pipe and a material inlet pipe; an inlet of the first cyclone separator is connected with the upper end of the calcining furnace, a first air outlet is formed in the upper end, and a first solid outlet is formed in the lower end; a high-temperature retention bin; the preheating mechanism communicates with the first air outlet and is provided with a first material output pipe communicating with the material inlet pipe; a raw material bin; the cooling mechanism is provided with a first hot air outlet which is communicated with the bottom of the calcining furnace. The cooling mechanism is provided with the first hot air outlet, hot air generated in the cooling process is sent back to the calcining furnace, effective recovery and reutilization of waste heat are achieved, and overall energy consumption is reduced; and hot air separated from the first air outlet is fed into the preheating mechanism to preheat the raw materials entering the preheating mechanism, waste heat utilization is improved, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized calcination of magnesium and aluminum smelting, in particular to a fluidized calcination system. Background Art

[0002] Magnesium and aluminum smelting technology is an important component of the nonferrous metals industry and is of great significance to the development of modern industry and science and technology. As a lightweight metal, magnesium has been widely used in aerospace, automotive manufacturing, electronic communications and other fields due to its excellent physical and chemical properties.

[0003] In the field of magnesium and aluminum smelting, traditional smelting methods have some significant problems, such as high energy consumption, low automation, and severe environmental pollution. With increasingly stringent environmental protection policies and rising energy costs, the magnesium and aluminum smelting industry is facing pressure to transform and upgrade. Traditional calcination processes are energy-intensive. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a fluidized calcining system.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] A fluidized bed calcining system comprises: a calcining furnace, with a hot air inlet pipe and a material inlet pipe provided at the bottom, the hot air inlet pipe being lower in height than the material inlet pipe; a first cyclone separator, the inlet of which is connected to the upper end of the calcining furnace, the upper end being provided with a first air outlet, and the lower end being provided with a first solid outlet; a high-temperature retention bin, for receiving material output from the first solid outlet and keeping the material warm; a preheating mechanism, which is connected to the first air outlet and has a first material output pipe connected to the material inlet pipe; a raw material bin, for conveying material to the preheating mechanism; a cooling mechanism, for receiving material output from the high-temperature retention bin and cooling the material, the cooling mechanism being provided with a first hot air outlet, the first hot air outlet being connected to the bottom of the calcining furnace, so as to convey the hot air formed by heat exchange with the material to the calcining furnace.

[0007] Furthermore, a powder output pipe and a particle output pipe are provided at the bottom of the high-temperature retention bin, a filter plate for filtering particulate materials is provided at the upper end of the powder output pipe, the powder output pipe is connected to the cooling mechanism, the particle output pipe is connected to a circulating calcining furnace, and the circulating calcining furnace is provided with a second material output pipe connected to the cooling mechanism.

[0008] Furthermore, the cooling mechanism includes a second cyclone separator and a first feed pipe; the inlet of the second cyclone separator is connected to the first feed pipe, and the second material output pipe and the powder output pipe are connected to the first feed pipe; the first hot air outlet is the air outlet of the second cyclone separator.

[0009] Furthermore, the cooling mechanism also includes a third cyclone separator and a fourth cyclone separator; the air outlet of the third cyclone separator is connected to the first feed pipe, and the solid outlet of the second cyclone separator and the air outlet of the fourth cyclone separator are connected to the inlet of the third cyclone separator; the inlet of the fourth cyclone separator is connected to the second feed pipe, the second feed pipe is used to let air in, and the solid outlet of the third cyclone separator is connected to the second feed pipe.

[0010] Furthermore, it also includes a conveying mechanism, an elevator and a cost bin, the conveying mechanism is used to receive the solid powder output from the solid outlet of the fourth cyclone separator and convey the solid powder to the elevator, and the elevator is used to convey the solid powder to the cost bin.

[0011] Furthermore, it also includes a dryer; the preheating mechanism has a second hot air outlet, the second hot air outlet is connected to the dryer, the dryer has an input port for inputting raw materials from the raw material warehouse, the dryer output port is connected to a third output pipe, and the third output pipe is connected to the preheating mechanism.

[0012] Furthermore, the preheating mechanism includes a fifth cyclone separator and a sixth cyclone separator, the inlet of the fifth cyclone separator is connected to the third output pipe; the inlet of the sixth cyclone separator is connected to the third feed pipe, the third feed pipe is connected to the first air outlet, the solid outlet of the fifth cyclone separator is connected to the third feed pipe, the second hot air outlet is the air outlet of the sixth cyclone separator, and the solid outlet of the sixth cyclone separator is connected to the first material output pipe.

[0013] Furthermore, the preheating mechanism also includes a seventh cyclone separator, the inlet of the seventh cyclone separator is connected to the first air outlet through the fourth feed pipe, the solid outlet of the sixth cyclone separator is connected to the fourth feed pipe, the air outlet of the seventh cyclone separator is connected to the third feed pipe, and the solid outlet of the seventh cyclone separator is connected to the first material output pipe.

[0014] Furthermore, the air outlet of the fifth cyclone separator is connected to a bag dust collector.

[0015] Furthermore, a screw feeder is provided at the bottom of the raw material bin, and the screw feeder is used to input the material into the dryer from the input port.

[0016] The utility model has the following beneficial effects:

[0017] A hot air inlet pipe and a material inlet pipe are provided at the bottom of the calcining furnace. The height of the hot air inlet pipe is lower than the material inlet pipe, which will cause the material to surge upward, so that the hot air can fully contact the material, thereby improving the thermal energy utilization efficiency and reducing energy consumption; the calcined material is kept warm by a high-temperature retention bin to prevent the material from cooling down quickly and combining with carbon dioxide to recover, which will affect the calcination effect; the cooling mechanism is provided with a first hot air outlet, which is connected to the bottom of the calcining furnace, and the hot air generated during the cooling process is returned to the calcining furnace, thereby realizing the effective recovery and reuse of waste heat and further reducing the overall energy consumption; and the hot air separated from the first air outlet is sent to the preheating mechanism to preheat the raw materials entering the preheating mechanism, thereby improving the utilization of waste heat and reducing energy consumption, and the preheated material entering the calcining furnace can effectively improve the roasting efficiency and effect; the utility model realizes the automatic processing of materials, improves the automation level of the system, reduces manual operation and improves production efficiency.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a partial structural diagram of the utility model;

[0022] Figure 3 It is a structural diagram of the preheating mechanism;

[0023] Figure 4 It is a structural diagram of the cooling mechanism.

[0024] Legend:

[0025] Calcination furnace 100, hot air inlet pipe 110, material inlet pipe 120;

[0026] a first cyclone separator 200, a first air outlet 210, and a first solid outlet 220;

[0027] High-temperature retention chamber 300, powder output pipe 310, particle output pipe 320, circulating calcining furnace 330, second material output pipe 331, furnace body 332, circulating transition device 333;

[0028] Preheating mechanism 400, first material output pipe 401, second hot air outlet 410, fifth cyclone separator 420, sixth cyclone separator 430, third feed pipe 431, seventh cyclone separator 440, fourth feed pipe 441;

[0029] Raw material bin 500, screw feeder 510;

[0030] Cooling mechanism 600, first hot air outlet 610, second cyclone separator 620, first feed pipe 630, third cyclone separator 640, fourth cyclone separator 650, second feed pipe 660, third material output pipe 670;

[0031] Conveying mechanism 700, elevator 710, cost bin 720;

[0032] Dryer 800, input port 810, third output pipe 820;

[0033] Bag dust collector 900. DETAILED DESCRIPTION

[0034] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0038] Please refer to Figure 1 and Figure 2 A fluidized calcining system in a preferred embodiment of the present invention includes a calcining furnace 100, a first cyclone separator 200, a high-temperature retention bin 300, a preheating mechanism 400, a raw material bin 500 and a cooling mechanism 600.

[0039] A hot air inlet pipe 110 and a material inlet pipe 120 are provided at the bottom of the calcining furnace 100 , and the hot air inlet pipe 110 is lower than the material inlet pipe 120 .

[0040] The inlet of the first cyclone separator 200 is connected to the upper end of the calcining furnace 100. A first air outlet 210 is provided at the upper end of the first cyclone separator 200, and a first solids outlet 220 is provided at the lower end of the first cyclone separator 200. Hot air from the upper end of the calcining furnace 100, carrying powder particles, enters the first cyclone separator 200. Under the separation action of the first cyclone separator 200, the hot air is discharged from the first air outlet 210, and the powder particles are discharged from the first solids outlet 220. A cyclone separator typically includes an inlet, an air outlet, and a solids outlet. A gas-solid mixture is introduced into the inlet and outlet. After passing through the cyclone separator, the gas is discharged from the air outlet, and the solid powder particles are discharged from the solids outlet.

[0041] The high temperature retention bin 300 is used to receive the material output from the first solid outlet 220 and keep the material warm, so as to prevent the material from cooling rapidly and recombining with carbon dioxide, resulting in recovery and incomplete calcination.

[0042] The preheating mechanism 400 is in communication with the first air outlet 210 and has a first material output pipe 401 in communication with the material inlet pipe 120 .

[0043] The raw material bin 500 is used to transport the materials to the preheating mechanism 400. The preheating mechanism 400 receives the hot air outputted from the first air outlet 210 and preheats the materials entering therein, thereby preheating the raw materials using the residual heat.

[0044] The cooling mechanism 600 is used to receive the material output from the high-temperature retention bin 300 and cool the material. The cooling mechanism 600 is provided with a first hot air outlet 610, which is connected to the bottom of the calcining furnace 100 to transport the hot air generated by heat exchange with the material to the calcining furnace 100.

[0045] The present invention provides a fluidized calcining system in a preferred embodiment. The bottom of the calcining furnace 100 is provided with a hot air inlet pipe 110 and a material inlet pipe 120. The hot air inlet pipe 110 is lower than the material inlet pipe 120, which will cause the material to surge upward, so that the hot air can fully contact the material, thereby improving the thermal energy utilization efficiency and reducing energy consumption; the calcined material is kept warm by the high-temperature retention bin 300 to prevent the material from cooling rapidly and combining with carbon dioxide to recover, thereby affecting the calcining effect; the cooling mechanism 600 is provided with a first hot air outlet, which is connected to the calcining furnace 10 0 bottom is connected, and the hot air generated in the cooling process is returned to the calcining furnace 100, realizing the effective recovery and reuse of waste heat, further reducing the overall energy consumption; and the hot air separated by the first air outlet 210 is sent to the preheating mechanism 400 to preheat the raw materials entering the preheating mechanism 400, thereby improving the utilization of waste heat and reducing energy consumption. Moreover, the preheated materials entering the calcining furnace 100 can effectively improve the roasting efficiency and effect. The utility model realizes the automatic processing of materials, improves the automation level of the system, reduces manual operation, and improves production efficiency.

[0046] Reference Figure 2 In some embodiments of the present invention, a powder outlet pipe 310 and a particle outlet pipe 320 are provided at the bottom of the high-temperature retention bin 300. It can be understood that larger particles are discharged from the particle outlet pipe 320, while smaller particles are discharged from the powder outlet pipe 310. To reduce the amount of powder entering the particle outlet pipe 320, a fan blowing air toward the powder outlet pipe 310 can be provided at the bottom of the high-temperature retention bin 300. This allows the powder to enter the powder outlet pipe 310 with the airflow, while larger particles are less likely to be blown by the airflow and fall into the particle outlet pipe 320 under their own gravity. The powder outlet pipe 310 is connected to the cooling mechanism 600, and the particle outlet pipe 320 is connected to the circulating calcining furnace 330. The circulating calcining furnace 330 is provided with a second material outlet pipe 331 that is connected to the cooling mechanism 600. To prevent particulate matter from entering powder output pipe 310, a filter plate for filtering particulate matter can be installed at the upper end of powder output pipe 310. This prevents particulate matter from entering powder output pipe 310, and instead allows it to fall into particle output pipe 320. Specifically, circulating calciner 330 includes a furnace body 332 and a circulating transition device 333. Furnace body 332 communicates with particle output pipe 320, allowing the particulate matter to continue calcining and complete reaction. The upper end of furnace body 332 is connected to circulating transition device 333. A circulating inlet is provided on one side of circulating transition device 333, connected to the lower half of furnace body 332, thereby circulating the particulate matter. It is understood that hot air is introduced into furnace body 332 to drive the flow of particulate matter. A second material output pipe 331 is connected to circulating transition device 333. After a period of reaction, the material can be discharged from second material output pipe 331. A control valve can be installed at the upper end of second material output pipe 331 to control the discharge of the material.

[0047] Reference Figure 4 In some embodiments of the present invention, the cooling mechanism 600 includes a second cyclone separator 620 and a first feed pipe 630; the inlet of the second cyclone separator 620 is connected to the first feed pipe 630, and the second material output pipe 331 and the powder output pipe 310 are connected to the first feed pipe 630, so that the powder material is sent into the second cyclone separator 620 through the first feed pipe 630 for cooling treatment. The first hot air outlet 610 is the air outlet of the second cyclone separator 620. After the second cyclone separator 620 contacts the powder material with residual heat, it can take away part of the heat, thereby cooling the powder material. At the same time, the hot air that absorbs the heat is discharged from the first hot air outlet 610 and finally sent to the bottom of the calcining furnace 100.

[0048] Reference Figure 4 In a further embodiment of the present invention, the cooling mechanism 600 further includes a third cyclone separator 640 and a fourth cyclone separator 650; the air outlet of the third cyclone separator 640 is connected to the first feed pipe 630, thereby supplying air to the first feed pipe 630, driving the powder particles into the second cyclone separator 620. The solids outlet of the second cyclone separator 620 and the air outlet of the fourth cyclone separator 650 are connected to the inlet of the third cyclone separator 640; the inlet of the fourth cyclone separator 650 is connected to the second feed pipe 660, which is used to allow air to enter. The solids outlet of the third cyclone separator 640 is connected to the second feed pipe 660. Specifically, the solids outlet of the third cyclone separator 640 is connected to the middle of the second feed pipe 660, and the end of the second feed pipe 660 is connected to an air pump for charging gas. The third cyclone separator 640 and the fourth cyclone separator 650 are used for multi-stage cooling, and the hot air generated after cooling can enter the second cyclone separator 620 in sequence, and finally be discharged from the outlet of the second cyclone separator 620 to the calcining furnace 100, thereby realizing efficient waste heat utilization.

[0049] Reference Figure 4 In a further embodiment of the present invention, a conveying mechanism 700, an elevator 710, and a cost bin 720 are further included. The conveying mechanism 700 is used to receive the solid powder output from the solid outlet of the fourth cyclone separator 650 and convey the solid powder to the elevator 710. The elevator 710 is used to convey the solid powder to the cost bin 720. The solid outlet of the fourth cyclone separator 650 is connected to a third material output pipe 670. The conveying mechanism 700 receives the material output from the third material output pipe 670 and uses the elevator 710 to convey the material to the cost bin 720 for storage, thereby realizing automated operation.

[0050] Reference Figure 1In a further embodiment of the present invention, a dryer 800 is further included. The preheating mechanism 400 has a second hot air outlet 410, which is connected to the dryer 800. The dryer 800 has an input port 810 for inputting raw materials from the raw material bin 500. Specifically, a screw feeder 510 is provided at the bottom of the raw material bin 500. The screw feeder 510 is used to input materials from the input port 810 into the dryer 800. The materials from the raw material bin 500 fall into the screw feeder 510, which rotates its internal screw to feed the materials into the input port 810, thus achieving automatic feeding. The output port of the dryer 800 is connected to a third output pipe 820, which is connected to the preheating mechanism 400. The waste heat from the second hot air outlet 410 is used to preliminarily preheat the raw materials. The dryer 800 then absorbs moisture from the raw materials, reducing the impact of moisture on subsequent processes.

[0051] Reference Figure 3 In a further embodiment of the present invention, the preheating mechanism 400 includes a fifth cyclone separator 420 and a sixth cyclone separator 430. The inlet of the fifth cyclone separator 420 is connected to the third output pipe 820. The inlet of the sixth cyclone separator 430 is connected to the third feed pipe 431, which is connected to the first air outlet 210. The solids outlet of the fifth cyclone separator 420 is connected to the third feed pipe 431. The second hot air outlet 410 serves as the air outlet of the sixth cyclone separator 430, which is connected to the first material output pipe 401. The hot air output from the outlet of the sixth cyclone separator 430 is used to transfer residual heat to the dryer 800, fully utilizing the residual heat and improving energy efficiency. The fifth cyclone separator 420 and the sixth cyclone separator 430 are used to fully preheat the material in multiple stages.

[0052] Reference Figure 3 In a further embodiment of the present invention, the preheating mechanism 400 further includes a seventh cyclone separator 440. It is understood that the third feed pipe 431 communicates with the first air outlet 210 via the seventh cyclone separator 440; the solids outlet of the sixth cyclone separator 430 communicates with the first material output pipe 401 via the seventh cyclone separator 440. The inlet of the seventh cyclone separator 440 communicates with the first air outlet 210 via the fourth feed pipe 441, the solids outlet of the sixth cyclone separator 430 communicates with the fourth feed pipe 441, the air outlet of the seventh cyclone separator 440 communicates with the third feed pipe 431, and the solids outlet of the seventh cyclone separator 440 communicates with the first material output pipe 401. The seventh cyclone separator 440 is used to increase the material preheating time and improve the material preheating effect.

[0053] Reference Figure 1In a further embodiment of the present invention, the air outlet of the fifth cyclone separator 420 is connected to a bag dust collector 900, and the bag dust collector 900 is used to remove dust from the output exhaust gas to avoid air pollution.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fluidized calcination system, characterized in that: include: The calcining furnace (100) is provided with a hot air inlet pipe (110) and a material inlet pipe (120) at the bottom, wherein the hot air inlet pipe (110) is lower than the material inlet pipe (120); A first cyclone separator (200), the inlet of which is connected to the upper end of the calcining furnace (100), the upper end of which is provided with a first air outlet (210), and the lower end of which is provided with a first solid outlet (220); A high-temperature retention bin (300) is used to receive the material output from the first solid outlet (220) and keep the material warm; A preheating mechanism (400) is communicated with the first air outlet (210) and has a first material output pipe (401) communicated with the material inlet pipe (120); A raw material bin (500) is used to transport materials to the preheating mechanism (400); The cooling mechanism (600) is used to receive the material output from the high-temperature retention bin (300) and cool the material. The cooling mechanism (600) is provided with a first hot air outlet (610). The first hot air outlet (610) is connected to the bottom of the calcining furnace (100) to transport the hot air generated by exchanging heat with the material to the calcining furnace (100).

2. The fluidized calcination system according to claim 1, characterized in that: A powder output pipe (310) and a particle output pipe (320) are provided at the bottom of the high-temperature retention bin (300), wherein the powder output pipe (310) is connected to a cooling mechanism (600), and the particle output pipe (320) is connected to a circulating calcining furnace (330), and the circulating calcining furnace (330) is provided with a second material output pipe (331) connected to the cooling mechanism (600).

3. The fluidized calcination system according to claim 2, characterized in that: The cooling mechanism (600) includes a second cyclone separator (620) and a first feed pipe (630); the inlet of the second cyclone separator (620) is connected to the first feed pipe (630), and the second material output pipe (331) and the powder output pipe (310) are connected to the first feed pipe (630); the first hot air outlet (610) is the air outlet of the second cyclone separator (620).

4. The fluidized calcination system according to claim 3, characterized in that: The cooling mechanism (600) further includes a third cyclone separator (640) and a fourth cyclone separator (650); the air outlet of the third cyclone separator (640) is connected to the first feed pipe (630), the solid outlet of the second cyclone separator (620) and the air outlet of the fourth cyclone separator (650) are connected to the inlet of the third cyclone separator (640); the inlet of the fourth cyclone separator (650) is connected to the second feed pipe (660), the second feed pipe (660) is used to allow air to enter, and the solid outlet of the third cyclone separator (640) is connected to the second feed pipe (660).

5. The fluidized calcination system according to claim 1, characterized in that: The invention also includes a conveying mechanism (700), an elevator (710) and a cost bin (720), wherein the conveying mechanism (700) is used to receive the solid powder output from the solid outlet of the fourth cyclone separator (650) and convey the solid powder to the elevator (710), and the elevator (710) is used to convey the solid powder to the cost bin (720).

6. The fluidized calcination system according to claim 1, characterized in that: The invention also includes a dryer (800); the preheating mechanism (400) has a second hot air outlet (410), the second hot air outlet (410) is connected to the dryer (800), the dryer (800) has an input port (810) for inputting raw materials from the raw material bin (500), and the output port of the dryer (800) is connected to a third output pipe (820), and the third output pipe (820) is connected to the preheating mechanism (400).

7. The fluidized calcination system according to claim 6, characterized in that: The preheating mechanism (400) includes a fifth cyclone separator (420) and a sixth cyclone separator (430), wherein the inlet of the fifth cyclone separator (420) is connected to the third output pipe (820); the inlet of the sixth cyclone separator (430) is connected to the third feed pipe (431), and the third feed pipe (431) is connected to the first air outlet (210); the solid outlet of the fifth cyclone separator (420) is connected to the third feed pipe (431), the second hot air outlet (410) is the air outlet of the sixth cyclone separator (430), and the solid outlet of the sixth cyclone separator (430) is connected to the first material output pipe (401).

8. The fluidized calcination system according to claim 7, characterized in that: The preheating mechanism (400) further includes a seventh cyclone separator (440), the inlet of the seventh cyclone separator (440) being connected to the first air outlet (210) via a fourth feed pipe (441), the solid outlet of the sixth cyclone separator (430) being connected to the fourth feed pipe (441), the air outlet of the seventh cyclone separator (440) being connected to the third feed pipe (431), and the solid outlet of the seventh cyclone separator (440) being connected to the first material output pipe (401).

9. The fluidized calcination system according to claim 7, characterized in that: The air outlet of the fifth cyclone separator (420) is connected to a bag dust collector (900).

10. The fluidized calcination system according to claim 6, characterized in that: A screw feeder (510) is provided at the bottom of the raw material bin (500), and the screw feeder (510) is used to input the material into the dryer (800) from the input port (810).

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