Kiln-type calcining furnace device with sealing structure

Abstract

The present invention relates to a kiln-type calcination furnace device having a sealed structure, which creates an oxygen-free environment inside a calcination furnace to prevent fire and explosion accidents in the calcination furnace during a calcination process in a waste battery recycling process, and in one embodiment, a calcination furnace device is provided, including a rotating part including a rotating main body that rotates to stir a raw material supplied to the inside, the rotating main body being sequentially provided with a heating area that heats the raw material and a cooling area that cools the heated raw material passing through the heating area; a fixed part including a first fixed chamber and a second fixed chamber connected to both end portions of the rotating part, respectively, and supporting the rotating part; a sealing part provided at a side where the rotating part and the fixed part are combined, the sealing part being provided to prevent air from flowing into the inside of the rotating part; a raw material supply part connected to the first fixed chamber and supplying a raw material to the rotating part; and a raw material discharge part connected to the second fixed chamber and discharging a raw material calcined in the rotating part.

Description

Technical Field

[0001] This invention relates to a kiln-type calcining furnace device with a sealed structure. Background Technology

[0002] Recently, with the increasing popularity of electric vehicles, the demand for electric vehicle batteries is rising. At the same time, there is growing attention being paid to the reuse of used batteries that have reached the end of their lifespan and can no longer function properly.

[0003] Waste batteries from electric vehicles are recycled for reuse by recovering valuable metals such as Li, Ni, Co, Mn, and Cu. This recycling process requires a calcination process to remove electrolytes and other organic matter. However, the calcination furnace frequently experiences fires or explosions due to oxygen intrusion during operation. Furthermore, inadequate calcination leads to excessive levels of total organic carbon (TOC) in wastewater and products, causing various other problems.

[0004] (Patent Document) KR 10-2022-0116827 A Summary of the Invention

[0005] (a) Technical problems to be solved The present invention aims to solve the above-mentioned problems and relates to a kiln-type calcining furnace device with a sealed structure, which can create an oxygen-free environment inside the calcining furnace to prevent fire and explosion accidents in the calcining furnace during the calcination process of waste battery recycling.

[0006] (II) Technical Solution In order to achieve the above objectives, the present invention provides a calcining furnace apparatus as described below.

[0007] In one embodiment of the present invention, a calcining furnace apparatus is provided, comprising: a rotating part including a rotating body, the rotating body rotating to stir raw materials supplied inside, the rotating body being sequentially provided with a heating zone for heating the raw materials and a cooling zone for cooling the heated raw materials passing through the heating zone; a fixing part including a first fixing chamber and a second fixing chamber respectively connected to two ends of the rotating part and supporting the rotating part; a sealing part disposed on the side where the rotating part and the fixing part are joined, the sealing part being configured to prevent air from flowing into the interior of the rotating part; a raw material supply part connected to the first fixing chamber and supplying raw materials to the rotating part; and a raw material discharge part connected to the second fixing chamber and discharging the raw materials calcined in the rotating part.

[0008] In one embodiment, the sealing portion may include: a sealing ring, which is annular in shape surrounding the rotating body and has an internal receiving space to accommodate a disk protruding outward from the rotating body; a sealing member disposed inside the sealing ring and pressing against both sides of the disk; an elastic member connected to one end of the sealing member and pressing the sealing member against the disk side; and a connecting member connecting the sealing ring and the fixing portion and preventing air from flowing into the interior of the rotating body.

[0009] In one embodiment, at least a portion of the connecting component may be made of a flexible material that stretches or contracts as the rotating body moves along its length.

[0010] In one embodiment, the accommodating space may be configured to be larger than the disk to accommodate radial movement of the rotating body.

[0011] In one embodiment, the raw material supply unit may include: a first supply hopper for storing raw materials; a second supply hopper connected to the first supply hopper and receiving a predetermined amount of the raw materials from the first supply hopper via a first rotary valve and storing them; and a first screw feeder connected to the second supply hopper and receiving a predetermined amount of the raw materials from the second supply hopper via a second rotary valve and conveying them to the rotating body, wherein the predetermined amount of the first rotary valve and the second rotary valve may be the same.

[0012] In one embodiment, the first supply hopper and the second supply hopper may include a weighing sensor for measuring the load of the raw materials stored in each hopper, and the first supply hopper and the second supply hopper may be configured to have an internal storage amount of raw materials measured by the weighing sensor that is above a preset value range.

[0013] In one embodiment, the first screw feeder may include: a cylindrical housing; a screw disposed inside the housing for conveying the raw material; a supply motor disposed at one end of the housing for rotating the screw; and a rotation control unit connected to the supply motor for controlling the rotation speed of the screw, wherein the rotation control unit can control the rotation speed of the screw such that the amount of raw material transmitted through the first rotary valve and the second rotary valve is the same as the amount of raw material conveyed through the screw into the rotating body.

[0014] In one embodiment, the raw material discharge section may include: a first discharge hopper for storing the discharged raw material; a second discharge hopper connected to the first discharge hopper and receiving and storing the raw material from the first discharge hopper; and a second screw feeder connected to the first discharge hopper and the second discharge hopper and disposed at an angle relative to a surface parallel to the ground.

[0015] In one embodiment, the second screw feeder may be tilted such that the side connected to the first discharge hopper is closer to the ground than the side connected to the second discharge hopper.

[0016] In one embodiment, the raw material discharge section may further include: a pneumatic conveying device connected to the second discharge hopper, and using gas to convey the raw material received from the second discharge hopper.

[0017] In one embodiment, the calcining furnace apparatus may further include: a pressure gauge for measuring the pressure inside the rotating body; a thermometer for measuring the temperature inside the rotating body; and an oxygen concentration meter for measuring the concentration of oxygen flowing inside the rotating body.

[0018] In one embodiment, the calcining furnace apparatus may further include: a nitrogen supply device for supplying nitrogen; a control valve for regulating the amount of nitrogen supplied from the nitrogen supply device; and a nitrogen supply pipe for connecting the nitrogen supply device and the rotating body.

[0019] In one embodiment, when the pressure measured by the pressure gauge is lower than the lower limit of a preset numerical range, the control valve can be controlled to supply nitrogen.

[0020] In one embodiment, the calcining furnace apparatus may further include: a cooling water injection device disposed on the cooling zone side, which sprays cooling water onto the outer peripheral surface of the rotating body.

[0021] (III) Beneficial Effects According to one embodiment of the present invention, an oxygen-free environment can be created to prevent fire and explosion accidents in the calcination furnace during the calcination process in the waste battery recycling process.

[0022] Furthermore, according to one embodiment of the present invention, since the heating section and the cooling section are not configured as two separate sections but are integrally formed in a calcining furnace, the scale of the calcining furnace can be expanded. Attached Figure Description

[0023] Figure 1 This is a schematic plan view of a calcining furnace apparatus according to an embodiment of the present invention.

[0024] Figure 2 This is an enlarged plan view of the sealing part, namely part A, according to an embodiment of the present invention.

[0025] Figure 3 This is a diagram showing the usage state of the sealing part according to an embodiment of the present invention when the rotating body moves along the length direction.

[0026] Figure 4 This is a diagram showing the usage state of the sealing part according to an embodiment of the present invention when the rotating body moves radially.

[0027] Figure 5 This is an enlarged plan view of the raw material supply section according to an embodiment of the present invention.

[0028] Figure 6 This is an enlarged plan view of the raw material discharge section according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures: 10: Calcination furnace device 100: Rotating part 110: Rotating main body; 120: Heating area 130: Cooling Zone 131: Cooling Water Spray Device 200: Fixing part; 210: First fixing chamber 220: Second fixed chamber; 300: Sealing part 310: Sealing ring; 311: Accommodation space 320: Seal 330: Elastic component 340: Connecting component; 341: Flexible material 400: Raw Material Supply Department; 410: First Supply Hopper 411: First weighing sensor; 412: First rotary valve 420: Second supply hopper; 421: Second weighing sensor 422: Second rotary valve; 430: First screw feeder 431, 531: Motor supply; 432, 532: Screw. 433, 533: Outer shell; 500: Raw material discharge section 510: First discharge hopper; 511: Third weighing sensor 520: Second discharge hopper; 521: Fourth weighing sensor 522: Fourth rotary valve; 530: Second screw feeder 540: Pneumatic conveying device Detailed Implementation

[0030] Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. However, the concept of the present invention is not limited to the proposed embodiments. Those skilled in the art who understand the concept of the present invention can easily propose other backward inventions or other embodiments included within the scope of the present invention by adding, changing, or deleting other components, etc., and these should also be included within the scope of the present invention.

[0031] Furthermore, throughout the specification, when a component is "connected" to another component, this includes not only cases where these components are "directly connected," but also cases where they are "indirectly connected" with another component in between. Additionally, when a component is "included," unless specifically stated otherwise, it means that other components may be included, rather than excluded.

[0032] Furthermore, components with the same concept and the same function appearing in the accompanying drawings of various embodiments should be described using the same reference numerals.

[0033] Figure 1 This is a schematic plan view illustrating a calcining furnace apparatus 10 according to an embodiment of the present invention. Figure 1 As shown, the calcining furnace apparatus 10 according to an embodiment of the present invention includes a rotating part 100, a fixing part 200, a sealing part 300, a raw material supply part 400, and a raw material discharge part 500, and may be a rotary kiln type calcining furnace for performing calcination processes of raw materials such as black powder.

[0034] According to one embodiment of the present invention, the rotating part 100 may include a rotating body 110, which rotates to stir the raw material supplied inside. The rotating body 110 may be a cylindrical shell. The rotating body 110 is sequentially provided with a heating zone 120 for heating the raw material and a cooling zone 130 for cooling the heated raw material passing through the heating zone 120. In this case, the heating zone 120 may be provided on the raw material supply section 400 side, and the cooling zone 130 may be provided on the raw material discharge section 500 side. Conventionally, the heating zone and the cooling zone are configured as two sections, but according to one embodiment of the present invention, the calcining furnace apparatus 10 integrally provides the heating zone 120 and the cooling zone 130 inside a rotating body 110, thus enabling the scaling up of the calcining furnace equipment.

[0035] Furthermore, in the rotating part 100 according to an embodiment of the present invention, the rotating body 110 may be inclined relative to a plane parallel to the ground. Raw materials supplied to the interior of the rotating body 110 are heated in the heating zone 120 at a temperature of 500°C or higher to perform a calcination process, and cooled along the inclined rotating body 110 through the cooling zone 130. In the heating zone 120, a heater (not shown) may be provided surrounding the exterior of the rotating body 110. In the cooling zone 130, a separate cooling device (not shown) may be provided inside the rotating body 110. Furthermore, the calcination furnace apparatus 10 according to an embodiment of the present invention may further include a cooling water injection device 131, which is provided on the side of the cooling zone 130 and sprays cooling water onto the outer peripheral surface of the rotating body 110. Thus, the calcination furnace apparatus 10 according to an embodiment of the present invention improves the cooling effect by applying an indirect cooling device to the exterior of the rotating body 110.

[0036] According to one embodiment of the present invention, the fixing part 200 includes a first fixing chamber 210 and a second fixing chamber 220 respectively connected to both ends of the rotating part 100. The first fixing chamber 210 may be disposed on the side of the raw material supply part 400, and the second fixing chamber 220 may be disposed on the side of the raw material discharge part 500. In this case, unlike the rotating part 100, the fixing part 200 according to one embodiment of the present invention does not rotate, but can be fixed to the ground to support the rotating part 100. In this case, the first fixing chamber 210 may be configured to communicate with the raw material supply part 400, and the second fixing chamber 220 may be configured to communicate with the raw material discharge part 500. In addition, an exhaust pipe (not shown) may be provided on one side of the second fixing chamber 220, through which waste gas generated during calcination in the rotating body 110 may be discharged.

[0037] At this time, according to an embodiment of the present invention, the calcining furnace apparatus 10 can form a positive pressure inside the rotating body 110 to perform the calcination process. For example, the pressure inside the rotating body 110 can be set to a preset value range to perform the calcination process, and the preset value range can be from 2 mbar to 15 mbar. Thus, according to an embodiment of the present invention, the calcining furnace apparatus 10 can prevent oxygen from flowing in through the exhaust pipe (not shown). On the other hand, according to an embodiment of the present invention, the calcining furnace apparatus 10 can further include a pressure gauge (not shown) that measures the internal pressure of the rotating body 110 to maintain a positive pressure inside the rotating body 110. When the pressure measured by the pressure gauge (not shown) deviates from the preset value range, a fan (not shown) provided on the side of the exhaust pipe (not shown) can be controlled to adjust the pressure to the preset value range.

[0038] Furthermore, the calcining furnace apparatus 10 according to an embodiment of the present invention may further include a thermometer (not shown) for measuring the internal temperature of the rotating body 110 and an oxygen concentration meter (not shown) for measuring the oxygen concentration flowing inside the rotating body 110. When the oxygen concentration measured by the oxygen concentration meter (not shown) deviates from a preset value range, an alarm can be issued to the operator and the calcination process can be interrupted. At this time, the location and structure of the pressure gauge (not shown), thermometer (not shown), and oxygen concentration meter (not shown) are not limited, as long as they can measure the pressure, temperature, and oxygen concentration inside the rotating body 110.

[0039] According to an embodiment of the present invention, a sealing portion 300 is disposed on the side where the rotating portion 100 and the fixed portion 200 are joined. The sealing portion 300 can be configured to prevent air from flowing into the interior of the rotating portion 100. In the present invention, there is a problem of fire or explosion due to oxygen flowing into the rotating body 110 during the calcination process. However, by applying the sealing portion 300, the calcination furnace apparatus 10 according to an embodiment of the present invention can control the interior of the rotating portion 100 to an oxygen-free environment, thus preventing fire and explosion problems. The specific structure and usage of the sealing portion 300 will be described below with reference to... Figures 2 to 4 Please provide an explanation.

[0040] According to one embodiment of the present invention, a raw material supply unit 400 can be connected to the first fixed chamber 210 and supply the raw material to the rotating part 100. Additionally, according to another embodiment of the present invention, a raw material discharge unit 500 can be connected to the second fixed chamber 220 and discharge the raw material calcined in the rotating part 100. The specific structure and function of the raw material supply unit 400 and the raw material discharge unit 500 will be described below with reference to... Figure 5 and Figure 6 Please provide an explanation.

[0041] Furthermore, the calcining furnace apparatus 10 according to an embodiment of the present invention may further include: a nitrogen supply device 600 for supplying nitrogen; a control valve 610 for regulating the amount of nitrogen supplied from the nitrogen supply device 600; and a nitrogen supply pipe 611 for connecting the nitrogen supply device 600 and the rotating body 110. In this case, the control valve 610 may be a flow control valve capable of PID control, which can control the supply of nitrogen when the pressure measured by the pressure gauge (not shown) is lower than the lower limit of a preset value range. Thus, the calcining furnace apparatus 10 according to an embodiment of the present invention can maintain a positive pressure inside the rotating body 110 during the calcination process.

[0042] That is, in a calcination furnace apparatus 10 according to an embodiment of the present invention, a heating zone 120 and a cooling zone 130 are sequentially designed on a rotating body 110, thereby expanding the scale to 10 ton / h with a single calcination unit. Furthermore, by applying a sealing part 300 to control the interior of the rotating body 110 performing the calcination process as an oxygen-free environment, fire and explosion problems can be prevented. Moreover, in a calcination furnace apparatus 10 according to an embodiment of the present invention, the pressure inside the rotating body 110 can be made positive by the nitrogen supply device 600. In particular, in the event of a failure of the sealing part 300, initial start-up, or the end of operation, supplying nitrogen can create a positive pressure inside the rotating body 110, thereby indirectly blocking the inflow of oxygen.

[0043] Figures 2 to 4 The specific structure and usage of a sealing portion 300 according to an embodiment of the present invention are shown. More specifically, Figure 2 This is an enlarged plan view of the sealing portion 300 according to an embodiment of the present invention. Figure 3 This is a usage diagram of the sealing part 300 according to an embodiment of the present invention when it moves along the length direction. Figure 4 This is a diagram showing the usage state of the sealing portion 300 according to an embodiment of the present invention during radial movement. Hereinafter, refer to... Figures 2 to 4 The sealing portion 300 according to an embodiment of the present invention will be described.

[0044] Furthermore, in a calcining furnace apparatus 10 according to an embodiment of the present invention, the sealing portion 300 may be respectively disposed in the first fixed chamber 210 and the second fixed chamber 220 (see reference). Figure 1 ), and the same configuration can be applied, so even Figures 2 to 4The description is based on the first fixed chamber 210 side, and applies to the second fixed chamber 220 (refer to...). Figure 1 The sealing part 300 can also be described in the same way.

[0045] According to an embodiment of the present invention, the sealing part 300 includes: a sealing ring 310, which is annular in shape surrounding the rotating body 110 and has an internal receiving space 311 for receiving a disk 111 protruding outward from the rotating body 110; a sealing member 320 disposed inside the sealing ring 310 and pressing against both sides of the disk 111; an elastic member 330 connected to one end of the sealing member 320 and pressing the sealing member 320 against the disk 111; and a connecting member 340 connecting the sealing ring 310 and the fixing part 200 (see reference 200). Figure 1 ), and prevent air from flowing into the interior of the rotating body 110. Here, Figures 2 to 4 It is explained that the connecting component 340 connects the sealing ring 310 and the first fixed chamber 210. Similarly, the connecting component 340 can also connect the sealing ring 310 and the second fixed chamber 220 to form a sealing structure.

[0046] On the other hand, air flowing outside the rotating body 110 can flow along the outer circumferential surface of the disk 111 into the gap between the first fixed chamber 210 and the rotating body 110, which may cause fire and explosion problems during the calcination process. In this case, the sealing element 320 can block the airflow passage by vertically pressing the disk 111. Multiple sealing elements 320 can be respectively disposed on both sides of the disk 111. Furthermore, the multiple sealing elements 320 can each receive elastic force from the elastic member 330 for support.

[0047] Furthermore, at least a portion of the connecting member 340 according to an embodiment of the present invention may be made of a flexible material 341 that stretches or contracts as the rotating body 110 moves along its length. Therefore, as Figure 3 As shown, during the calcination process, the rotating body 110 can move to the side of the first fixed chamber 210 in the direction of the arrow. At this time, as the flexible material 341 shrinks, the twisting or damage of the sealing part 300 can be prevented, and a continuous sealing structure can be formed.

[0048] Additionally, the accommodating space 311 can be configured to be larger than the disk 111 to accommodate the radial movement of the rotating body 110. That is, as... Figure 4As shown, during the calcination process, the rotating body 110 can move radially. Since the accommodating space 311 is set to be larger than the disk 111, the movement of the disk 111 can be accommodated within the accommodating space 311, preventing twisting or damage to the sealing part 300 and forming a continuous sealing structure. Here, the length direction can refer to the length direction of the rotating body 110, and the radial direction can refer to the direction perpendicular to the length direction, i.e., the radial direction of the rotating body 110.

[0049] Therefore, according to an embodiment of the present invention, the calcining furnace apparatus 10 can block oxygen from flowing into the gap between the rotating part 100 and the fixed part 200 from the outside by means of the sealing part 300, thereby preventing fires and explosions that may occur during the calcination process. Furthermore, during the calcination process, the rotating part 100 may move longitudinally or radially perpendicularly, which may cause damage and distortion to the sealing part 300. However, according to an embodiment of the present invention, the sealing part 300 can continuously form a sealing structure while accommodating the longitudinal and radial movement of the rotating body 110.

[0050] Figure 5 An enlarged view shows a raw material supply unit 400 according to an embodiment of the present invention. (Refer to...) Figure 5 According to an embodiment of the present invention, a raw material supply unit 400 includes: a first supply hopper 410 for storing raw materials; a second supply hopper 420 connected to the first supply hopper 410 and receiving and storing the raw materials from the first supply hopper 410; and a first screw feeder 430 connected to the second supply hopper 420 and receiving and conveying the raw materials from the second supply hopper 420 to the rotating body 110. Since the first screw feeder 430 is disposed through the first fixed chamber 210, the raw materials supplied through the first supply hopper 410 and the second supply hopper 420 can be transferred to the interior of the rotating body 110.

[0051] On the other hand, the first supply hopper 410 and the second supply hopper 420 can be connected via a first rotary valve 412, and the second supply hopper 420 and the first screw feeder 430 can be connected via a second rotary valve 422. The first rotary valve 412 can transfer a predetermined amount of the raw material from the first supply hopper 410 to the second supply hopper 420, and similarly, the second rotary valve 422 can transfer a predetermined amount of the raw material from the second supply hopper 420 to the first screw feeder 430. In this case, the predetermined amounts from the first rotary valve 412 and the second rotary valve 422 can be the same, thereby enabling continuous discharge of the raw material.

[0052] Additionally, the first supply hopper 410 and the second supply hopper 420 may include load cells 411 and 421 for measuring the load of the raw materials stored in each. More specifically, the first supply hopper 410 may include a first load cell 411, and the second supply hopper 420 may include a second load cell 421. In this case, the first supply hopper 410 and the second supply hopper 420 may be set to have an internal storage amount of raw materials measured by the load cells 411 and 421 that is above a preset value range. That is, external air may flow in during the raw material supply process through the first supply hopper 410 and the second supply hopper 420, thereby flowing into the interior of the rotating body 110. To prevent this, raw materials above a preset value range may be continuously provided in the first supply hopper 410 and the second supply hopper 420, thereby forming a sealed structure through the raw materials.

[0053] Furthermore, the first screw feeder 430 includes a supply motor 431, a screw 432, a housing 433, and a rotation control unit (not shown). The housing 433 is cylindrical, and the screw 432 conveys the raw material inside the housing 433. The supply motor 431 is located at one end of the housing 433 and can rotate the screw 432. The rotation control unit (not shown) is connected to the supply motor 431 and can control the rotation speed of the screw 432, so that the amount of raw material transmitted through the first rotary valve 412 and the second rotary valve 422 is the same as the amount of raw material conveyed into the rotating body 110 through the screw 432. Thus, the conveyed raw material is conveyed while filling the interior of the housing 433, thereby forming a sealed structure inside the housing 433. However, not limited to this, in order to prevent the first screw feeder 430 from malfunctioning, the rotation control unit (not shown) can control the rotation speed of the screw 432 so that the amount of raw material conveyed to the rotating body 110 through the screw 432 is greater than the amount of raw material transmitted through the first rotary valve 412 and the second rotary valve 422.

[0054] Figure 6 An enlarged view shows the raw material discharge section 500 according to an embodiment of the present invention. (Refer to...) Figure 6 According to an embodiment of the present invention, a raw material discharge section 500 includes: a first discharge hopper 510 for storing the discharged raw material; a second discharge hopper 520 connected to the first discharge hopper 510 and receiving and storing the raw material from the first discharge hopper 510; and a second screw feeder 530 connecting the first discharge hopper 510 and the second discharge hopper 520, and inclined relative to a plane parallel to the ground. Since the first discharge hopper 510 is connected to the second fixed chamber 220, the raw material discharged through the first discharge hopper 510 and the second discharge hopper 520 can be discharged to the outside. At this time, the second screw feeder 530 can be inclined such that the side connected to the first discharge hopper 510 is closer to the ground than the side connected to the second discharge hopper 520. As a result, the raw material conveyed by the second screw feeder 530 is conveyed in a direction opposite to the direction of gravity, thereby forming a sealed structure inside the second screw feeder 530.

[0055] The connection between the first discharge hopper 510 and the second fixed chamber 220 can be achieved through a discharge pipe, which, although not shown, can be adjusted and discharged in a predetermined amount by providing a third rotary valve (not shown). Furthermore, the second discharge hopper 520 can discharge a predetermined amount of the raw material to the outside through a fourth rotary valve 522. At this time, the predetermined amounts of the third rotary valve (not shown) and the fourth rotary valve 522 can be the same, thereby achieving continuous discharge.

[0056] Additionally, with the first supply hopper 410 (refer to...) Figure 5 ) and the second supply hopper 420 (refer to Figure 5 Similarly, the first discharge hopper 510 and the second discharge hopper 520 may include weighing sensors 511 and 521 for measuring the load of the raw materials stored in each. More specifically, the first discharge hopper 510 may include a third weighing sensor 511, and the second discharge hopper 520 may include a fourth weighing sensor 521. In this case, the first discharge hopper 510 and the second discharge hopper 520 may be set to have an internal stored raw material quantity measured by the weighing sensors 511 and 521 that is above a preset value range. That is, external air may flow in along with the raw material discharge through the first discharge hopper 510 and the second discharge hopper 520, thereby flowing into the interior of the rotating part 100. To prevent this, raw material above a preset value range may be continuously provided in the first discharge hopper 510 and the second discharge hopper 520, thereby forming a sealed structure through the raw material.

[0057] Furthermore, the second screw feeder 530 may have the same characteristics as the first screw feeder 430 (see reference 430). Figure 5 The second screw feeder 530 may include a supply motor 531, a screw 532, a housing 533, and a rotation control unit (not shown). The supply motor 531, the screw 532, the housing 533, and the rotation control unit (not shown) may have the same configuration as the first screw feeder 430 (see reference 430). Figure 5 The configuration has the same function. At this time, the rotation control unit can control the rotation speed of the screw 532 so that the amount of raw material transferred from the rotating body 110 to the first discharge hopper 510 is the same as the amount of raw material conveyed to the second discharge hopper 520 through the screw 532. As a result, the conveyed raw material is conveyed while filling the interior of the housing 533, thereby forming a sealed structure inside the housing 533. However, the configuration is the same as the first screw feeder 430 (refer to...). Figure 5 (Similar to, but not limited to, this.)

[0058] Furthermore, according to an embodiment of the present invention, the raw material discharge section 500 may further include a pneumatic conveying device 540 connected to the second discharge hopper 520, which uses gas to convey the raw material received from the second discharge hopper 520. The pneumatic conveying device 540 facilitates the discharge of the raw material, can indirectly cool the raw material, and can alleviate the problem of raw material accumulation.

[0059] While the present invention has been described above with reference to embodiments, the present invention is not limited to the embodiments described above. It is obvious that modifications can be made by those skilled in the art without changing the technical concept of the present invention as claimed in the claims.

Claims

1. A calcining furnace apparatus, characterized in that, include: The rotating part includes a rotating body that rotates to stir raw materials supplied inside. The rotating body is provided with a heating zone for heating the raw materials and a cooling zone for cooling the heated raw materials passing through the heating zone. The fixing part includes a first fixing chamber and a second fixing chamber respectively connected to the two ends of the rotating part, and supports the rotating part; A sealing part is provided on the side where the rotating part and the fixed part are joined, and the sealing part is configured to prevent air from flowing into the interior of the rotating part; A raw material supply unit is connected to the first fixed chamber and supplies raw materials to the rotating part; as well as The raw material discharge section is connected to the second fixed chamber and discharges the raw material calcined in the rotating section.

2. The calcining furnace apparatus according to claim 1, characterized in that, The sealing part includes: The sealing ring is in the shape of a ring surrounding the rotating body, and has an internal receiving space to accommodate a disc protruding outward from the rotating body; A sealing element is disposed inside the sealing ring and presses against both sides of the disk; An elastic member is connected to one end of the seal and presses the seal toward the disk side; and The connecting component connects the sealing ring and the fixing part, and prevents air from flowing into the interior of the rotating body.

3. The calcining furnace apparatus according to claim 2, characterized in that, At least a portion of the connecting component is made of a flexible material that stretches or contracts as the rotating body moves along its length.

4. The calcining furnace apparatus according to claim 3, characterized in that, The accommodating space is configured to be larger than the disk to accommodate the radial movement of the rotating body.

5. The calcining furnace apparatus according to claim 4, characterized in that, The raw material supply department includes: The first supply hopper is used to store raw materials; A second supply hopper is connected to the first supply hopper and receives a predetermined amount of the raw material from the first supply hopper via a first rotary valve for storage; and A first screw feeder is connected to the second supply hopper and receives a predetermined amount of the raw material from the second supply hopper via a second rotary valve, then conveys it to the rotating body. The predetermined amounts of the first rotary valve and the second rotary valve are the same.

6. The calcining furnace apparatus according to claim 5, characterized in that, The first supply hopper and the second supply hopper include: Weighing sensors are used to measure the load of each of the stored raw materials. The first and second supply hoppers are configured to store more than or equal to a preset value range, as measured by the weighing sensor.

7. The calcining furnace apparatus according to claim 6, characterized in that, The first screw feeder includes: Cylindrical outer shell; A screw, disposed inside the housing, is used to transport the raw material; A motor is supplied, disposed at one end of the housing, for rotating the screw; and A rotation control unit, connected to the supply motor, is used to control the rotation speed of the screw. The rotation control unit controls the rotation speed of the screw so that the amount of raw material transmitted through the first rotary valve and the second rotary valve is the same as the amount of raw material transported into the rotating body through the screw.

8. The calcining furnace apparatus according to claim 5, characterized in that, The raw material discharge section includes: The first discharge hopper is used to store the discharged raw materials; A second discharge hopper is connected to the first discharge hopper and receives and stores the raw materials from the first discharge hopper; and The second screw feeder connects the first discharge hopper and the second discharge hopper, and is inclined relative to a plane parallel to the ground.

9. The calcining furnace apparatus according to claim 8, characterized in that, The second screw feeder is inclined so that the side connected to the first discharge hopper is closer to the ground than the side connected to the second discharge hopper.

10. The calcining furnace apparatus according to claim 9, characterized in that, The raw material discharge section further includes: A pneumatic conveying device is connected to the second discharge hopper and uses gas to convey the raw material received from the second discharge hopper.

11. The calcining furnace apparatus according to claim 10, characterized in that, Further includes: A pressure gauge is used to measure the internal pressure of the rotating body; A thermometer is used to measure the internal temperature of the rotating body; as well as An oxygen concentration meter is used to measure the concentration of oxygen flowing inside the rotating body.

12. The calcining furnace apparatus according to claim 11, characterized in that, Further includes: Nitrogen supply unit, used to supply nitrogen; A control valve is used to regulate the amount of nitrogen supplied from the nitrogen supply device; as well as A nitrogen supply pipe is used to connect the nitrogen supply device and the rotating body.

13. The calcining furnace apparatus according to claim 12, characterized in that, When the pressure measured by the pressure gauge is lower than the lower limit of the preset value range, the control valve is activated to supply nitrogen.

14. The calcining furnace apparatus according to claim 13, characterized in that, Further includes: A cooling water spraying device is installed on the side of the cooling area and sprays cooling water onto the outer peripheral surface of the rotating body.

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