Rotary calcining device

Abstract

The utility model provides a rotary calcining device, which comprises a furnace tail, a furnace body and a furnace end, and is characterized in that a plurality of furnace wall convex shafts are uniformly arranged on the inner wall of the furnace body, a gas pipe is arranged at the central position in the furnace body, and the gas pipe penetrates through the furnace end and extends to one end of the furnace body; supporting devices are arranged at the two ends in the furnace body and used for supporting the gas pipe to convey heat energy, a waste heat recovery furnace is arranged above the furnace end, a plurality of heat conduction pipes are arranged on the outer side of the waste heat recovery furnace, the other ends of the heat conduction pipes are connected with the furnace end and used for conveying waste heat in the furnace into the waste heat recovery furnace, and a steam valve is arranged above the waste heat recovery furnace. According to the utility model, the combustion tube in the furnace body is matched with the furnace wall convex shafts for calcining, the furnace wall convex shafts are tightly attached to the inner wall of the furnace body, and a stirring effect is formed along with the rotation of a calcined material in the furnace body, so that the temperature in the furnace body is uniform and the same, the calcining efficiency is improved, and the problems of incomplete material calcining and poor calcining quality are solved; and the stability of the production process is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of calcination apparatus, and more particularly to a rotary calcination apparatus. Background Technology

[0002] The rotary calcining furnace is made of steel plates of varying thicknesses, pre-rolled and inlaid with refractory material. Several tires are fitted around the furnace body, which sits at a certain angle on support rollers corresponding to the tires. Calcination is carried out by a firing nozzle extending from the furnace head into the furnace body. Because the firing nozzle is a single, short tube, the temperature inside the furnace varies; the temperature near the nozzle is higher, while the temperature further away is lower. This uneven temperature distribution during calcination affects efficiency and reduces circulation performance. Furthermore, the rotary calcining furnace has a cylindrical interior. While the calcining material rotates with the furnace, the cylindrical shape limits calcination to a portion at the bottom of the furnace, preventing large-area calcination and further impacting efficiency.

[0003] Rotary calcining furnaces generate a large amount of waste heat during calcination, and most of the waste gas generated during calcination is discharged into the atmosphere through the chimney. At the same time, the waste heat inside the furnace is wasted and cannot be recovered and utilized. Therefore, it is necessary to design a rotary calcining device that can efficiently calcinate and recover heat gas to address the shortcomings of existing technologies. Utility Model Content

[0004] The purpose of this invention is to provide a rotary calcination device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotary calcination device, comprising a furnace tail, a furnace body, and a furnace head, characterized in that: multiple furnace wall protrusions are evenly arranged on the inner wall of the furnace body, and a gas pipe is arranged at the center of the furnace body; the gas pipe extends through the furnace head to one end of the furnace body, and support devices are arranged at both ends of the furnace body to support the gas pipe for transporting heat energy; a waste heat recovery furnace is arranged above the furnace head, and multiple heat conduction pipes are arranged on the outside of the waste heat recovery furnace; the other end of the heat conduction pipes is connected to the furnace head to transport the waste heat in the furnace into the waste heat recovery furnace; a steam valve is arranged above the waste heat recovery furnace; a gas pressure regulator is arranged on the outside of the furnace head, and the gas regulating port of the gas pressure regulator is connected to the gas pipe.

[0006] Preferably, the furnace wall convex shaft is semi-cylindrical in shape and is fixedly installed on the inner wall of the furnace body with the same length as the furnace body.

[0007] Preferably, the gas pipe is connected to a plurality of uniformly arranged combustion pipes of the same size, and the combustion pipes are cylindrical in shape.

[0008] Preferably, the combustion tube has multiple evenly arranged circular nozzles, and a filter screen is provided inside each circular nozzle.

[0009] Preferably, the support device includes a rotating shaft, a shaft housing, and support rods. The inner shaft of the rotating shaft is connected to the gas pipe, and the outer shaft of the rotating shaft is provided with a shaft housing. Support rods are symmetrically arranged on the shaft housing, and one end of the support rod is fixed to the inner wall of the furnace body.

[0010] Preferably, the heat-conducting pipe passes through the waste heat recovery furnace and is connected to the heating pipe. A water-filling pipe is provided on one side of the waste heat recovery furnace, and the water-filling pipe is located above the heat-conducting pipe.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model uses combustion tubes inside the furnace body in conjunction with furnace wall protrusions for calcination. Multiple furnace wall protrusions are tightly attached to the inner wall of the furnace body. As the calcining material rotates in the furnace body, a stirring effect is formed, and the calcining material is tumbled under the drive of the furnace wall protrusions. Multiple combustion tubes calcine inside the furnace body. With the rotation of the furnace body, the temperature inside the furnace body is made uniform, which increases the calcination efficiency and solves the problems of incomplete calcination and poor calcination quality. It enables the material to be heated evenly, avoids local overheating or undercooling, and ensures the stability of the production process.

[0013] 2. This utility model recovers and utilizes heat energy by setting up a waste heat recovery furnace. During calcination, the waste heat inside the furnace is transferred into the waste heat recovery furnace through a gas pipe. The waste heat recovery furnace can convert the waste heat into heat energy for secondary utilization, thereby reducing energy costs and ensuring the sustainability of waste heat recovery energy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the rotary calcining device of this utility model.

[0015] Figure 2 This is a schematic diagram of the furnace tail section structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the furnace head planing structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the middle side of the furnace body of this utility model.

[0018] Figure 5 This is a schematic diagram of the side section structure of the furnace body support device of this utility model.

[0019] Figure 6 This is a schematic diagram of the combustion tube structure of this utility model.

[0020] Figure 7 This is a schematic diagram of the cross-sectional structure of the waste heat recovery furnace of this utility model.

[0021] The components in the attached diagram are labeled as follows: 1: Furnace tail, 2: Furnace body, 201: Furnace wall convex shaft, 3: Furnace head, 4: Ventilation port, 5: Feed port, 6: Roller ring, 7: Support roller, 8: Support roller, 9: Large gear ring, 10: Reduction gear, 11: Gear motor, 12: Gas pipe, 1201: Combustion pipe, 1202: Circular burner nozzle, 1203: Filter screen, 13: Rotating shaft, 1301: Shaft housing, 1302: Support rod, 14: Waste heat recovery furnace, 1401: Heat conduction pipe, 1402: Heating pipe, 1403: Water supply pipe, 1404: Steam valve, 15: Discharge port, 16: Gas pressure regulator. Detailed Implementation

[0022] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0023] This utility model is as follows Figure 1 , Figure 2The diagram shows a rotary calcining apparatus. This apparatus is tilted to facilitate the feeding of calcining material from the inlet 5 into the furnace body 2 during calcination. As the furnace body 2 rotates, the calcining material rotates along with it and is fed from the furnace body 2 to the outlet 15. A vent 5 is located on one side of the furnace tail 1. The vent 5 has a cone shape, smaller on the outside and larger on the inside, which facilitates air circulation within the furnace and aids combustion. An inlet 5 is located above the furnace tail 1 for feeding the calcining material into it. The furnace tail 1 communicates with the furnace body 3. Multiple furnace wall protrusions 201, which are semi-cylindrical in shape, are evenly distributed on the inner wall of the furnace body 2. The length of the ring is the same as the inner wall of the furnace body 2, used to stir the calcined material within the furnace body 2. Two rolling rings 6 are fixedly connected to the outside of the furnace body 2. The rolling ring 6 is a cast steel ring installed on the furnace body 2, and a support roller 7 is provided below the rolling ring 6 to support the furnace body. When the furnace body 2 rotates, it rotates on the support roller 7 with the help of the rolling ring 6. The two ends of the support roller 7 are fixedly installed on the support roller 8. The support roller 8 is to prevent the furnace body 3 from slipping during operation. A large gear ring 9 is provided between the two rolling rings 6, and the lower part of the large gear ring 9 is connected to the reduction gear 10 to form a gear transmission. The central shaft of the reduction gear 10 is located on the reduction motor. The output shaft of the machine 11 is synchronously driven by the geared motor 11, enabling the furnace body 2 to rotate under the output of the geared motor 11. The furnace body 2 is the same as the furnace head 3, and a gas pipe 12 is installed inside the furnace head 3. The gas pipe 12 extends from the furnace head 3 to one end of the furnace body 2 to deliver gas into the furnace body 2 for calcination. Support devices are installed at both ends of the furnace body 2 to support the gas pipe 12 for delivering heat energy. A waste heat recovery furnace 14 is installed above the furnace head 3. The waste heat recovery furnace 14 is used to recover and utilize heat energy, converting the residual heat after calcination in the furnace body 2 into heat energy for secondary utilization. Multiple [unclear] are installed on the outside of the waste heat recovery furnace 14. A heat pipe 1401 is connected at one end to the furnace head 3, which facilitates the transfer of heat energy and exhaust gas from the furnace into the waste heat recovery furnace 14, ensuring the sustainability of waste heat recovery energy and reducing energy costs. A discharge port 15 is provided below the furnace head 3. The discharge port 15 is funnel-shaped. A gas pressure regulator 16 is provided on the outside of the furnace head 3, which facilitates the reduction of the gas pressure in the upstream pipe to the required operating pressure in the downstream pipe. The gas pressure regulator 16 is connected to the gas pipe 12, which can increase the regulation of the calcination temperature in the furnace and control and intercept the gas to ensure safe gas use for calcination.

[0024] like Figure 4 , Figure 6The rotary calcining device shown is characterized in that: a plurality of uniformly arranged combustion tubes 1201 of the same size are connected to the gas pipe 12, and the combustion tubes 1201 are connected to the gas pipe 12. The combustion tubes 1201 are cylindrical and have a plurality of uniformly arranged circular combustion nozzles 1202 of the same size, which facilitates multi-directional calcination of materials. A filter screen 1203 is provided in the circular combustion nozzles 1202 to effectively prevent the calcined materials from accidentally entering the combustion tubes 1201 and causing blockage.

[0025] like Figure 5 The rotary calcining device shown is characterized in that: the inner shaft of the rotating shaft 13 is connected to the gas pipe 12, so that the gas pipe 12 does not rotate with the furnace body 2 inside the furnace body 2; a shaft housing 1301 is provided outside the rotating shaft 13, the shaft housing 1301 is fastened to the outside of the rotating shaft 13, and support rods 1302 are symmetrically arranged on the shaft housing 1301. One end of the support rod 1302 is fixed to the inner wall of the furnace body 2, supporting the gas pipe 12 inside the furnace body 2, and rotating with the furnace body 2.

[0026] like Figure 7 The rotary calcination device shown is characterized in that: the heat conduction pipe 1401 passes through the waste heat recovery furnace 14 and is connected to the heating pipe 1402, which facilitates the transfer of waste heat in the furnace to the heating pipe 1402; a water supply pipe 1403 is provided on one side of the waste heat recovery furnace 14 to inject water into the waste heat recovery furnace 14, and the temperature of the heating pipe 1402 is used to heat the water to generate steam; and a steam valve 1404 is provided above the waste heat recovery furnace 14 to control steam leakage, thereby reducing energy costs and ensuring the sustainability of waste heat recovery energy.

[0027] Working Principle: A rotary calcining device first places the material to be calcined into the feed inlet 5. The device is tilted to facilitate its entry into the furnace body 2. The furnace body 2 is driven by a geared motor 11, which in turn drives a reduction gear 10 and a large gear ring 9, causing the furnace body 2 to rotate. Gas is transmitted through a gas pipe 12 within the furnace body 2 and distributed to multiple combustion tubes 1201 for calcination. The calcined material falls into the furnace body 3 for rotary calcination. Under the action of multiple furnace wall convex shafts 201, the calcined material can be heated evenly, avoiding localized overheating or undercooling. A gas pressure regulator 16 is connected to the end of the gas pipe 12 to increase the gas supply within the furnace, allowing the calcination temperature to rise rapidly. A conical ventilation opening 5 is provided on one side of the furnace tail 1 to... Air circulates well in the furnace to aid combustion and calcination. Two support devices are set at both ends of the furnace body 2 to support the gas pipe 12 for calcination in the furnace body 2. A rotating shaft 13 is set in the support device, and the gas pipe 12 is sleeved on the inner circumference of the rotating shaft 13 so that the gas pipe 12 does not rotate with the furnace body 2. When the calcination temperature reaches a certain level, waste heat is recovered. The hot air in the furnace is introduced into the waste heat recovery furnace 14 by the heat conduction pipe 1401. The waste heat enters the heating pipe 1403 and, together with the water supply pipe 1403, water is injected into the waste heat recovery furnace 14 to generate steam. Under the action of the steam valve 1404, the steam is controlled for secondary utilization. Under the rotation of the furnace body 2, the calcined material is transferred from the furnace body 2 to the furnace head 3 little by little and falls from the discharge port 15. At this point, the rotation calcination ends.

[0028] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A rotary calcining apparatus, comprising a furnace tail (1), a furnace body (2), and a furnace head (3), characterized in that: Multiple furnace wall protrusions (201) are evenly arranged on the inner wall of the furnace body (2), and a gas pipe (12) is arranged at the center of the furnace body (2). The gas pipe (12) extends through the furnace head (3) to one end of the furnace body (2), and support devices are arranged at both ends of the furnace body (2) to support the gas pipe (12) to transport heat energy. A waste heat recovery furnace is arranged above the furnace head (3), and multiple heat conduction pipes (1401) are arranged on the outside of the waste heat recovery furnace (14). The other end of the heat conduction pipes (1401) is connected to the furnace head (3) to transport the waste heat in the furnace into the waste heat recovery furnace (14). A steam valve (1404) is arranged above the waste heat recovery furnace (14). A gas pressure regulator (16) is arranged on the outside of the furnace head (3), and the gas regulating port of the gas pressure regulator (16) is connected to the gas pipe (12).

2. The rotary calcining apparatus as described in claim 1, characterized in that: The furnace wall convex shaft (201) is semi-cylindrical in shape and is fixedly installed on the inner wall of the furnace body (2) with the same length as the furnace body (2).

3. The rotary calcining apparatus as described in claim 1, characterized in that: The gas pipe (12) is connected to a plurality of uniformly arranged combustion pipes (1201) of the same size, and the combustion pipes (1201) are cylindrical in shape.

4. The rotary calcining apparatus as described in claim 3, characterized in that: The combustion tube (1201) has multiple evenly arranged circular nozzles (1202), and a filter screen (1203) is provided inside the circular nozzles (1202).

5. The rotary calcining apparatus as described in claim 1, characterized in that: The support device includes a rotating shaft (13), a shaft housing (1301), and a support rod (1302). The inner shaft of the rotating shaft (13) is connected to the gas pipe (12), and the rotating shaft (13) is provided with a shaft housing (1301) on the outside. The support rod (1302) is symmetrically arranged on the shaft housing (1301), and one end of the support rod (1302) is fixed to the inner wall of the furnace body (2).

6. The rotary calcining apparatus as described in claim 1, characterized in that: The heat pipe (1401) runs through the waste heat recovery furnace (14) and is connected to the heating pipe (1402). A water supply pipe (1403) is provided on one side of the waste heat recovery furnace (14), and the water supply pipe (1403) is located above the heat pipe (1401).

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