Waste heat recovery sealing device for double-cylinder rotary kiln

Abstract

The utility model discloses a waste heat recovery sealing device for a double-cylinder rotary kiln. The waste heat recovery sealing device comprises a sealing cover outer ring, a sealing cover inner ring annular air duct, a sealing cover rear cover and a cold air conveying axial flow fan. The sealing cover outer ring is of a cylindrical structure, the sealing cover rear cover is of an annular plate-shaped structure and located at one end of the sealing cover outer ring, and the cold air conveying axial flow fan is installed in an inner ring of the sealing cover rear cover. The sealing cover inner ring annular air channel is in a circular ring shape and is coaxial with the sealing cover outer ring, a separation device for dividing the space in the sealing cover outer ring into two independent spaces is further arranged between the sealing cover inner ring annular air channel and the sealing cover outer ring, and an inner barrel discharging port and an outer barrel discharging port are formed in the bottom of the sealing cover outer ring. The waste heat recovery sealing device is reasonable in structural design, materials in the inner barrel and the outer barrel are separated through the annular air channel in the inner ring of the sealing cover, and the air channel is convenient to clean through the matched ash discharging pipe; and the inner and outer cylinder discharge ports respectively matched with the inner and outer cylinders are also matched, so that the discharging is convenient, and the application prospect is good.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, and specifically to a waste heat recovery sealing device for a double-cylinder rotary kiln. Background Technology

[0002] A rotary kiln is a rotating calcining kiln (commonly known as a rotary kiln), resembling a rotating bed in shape, also called a rotary bed kiln, and belongs to the building materials equipment category. Currently, most rotary kilns are single-cylinder rotary kilns. While single-cylinder rotary kilns have the advantage of simple structure, their processing efficiency still has significant room for improvement. A double-cylinder rotary kiln uses an inner cylinder to process high-temperature materials and an outer cylinder to process low-temperature materials. The high-temperature material in the inner cylinder transfers heat to the low-temperature material in the outer cylinder through radiation, effectively improving the equipment's thermal efficiency. Current double-cylinder rotary kiln designs still have some shortcomings: 1) How to achieve efficient heat circulation between the inner and outer cylinders; 2) Separation of materials discharged from the inner and outer cylinders.

[0003] Therefore, developing a device for a double-cylinder rotary kiln that can achieve efficient heat circulation between the inner and outer cylinders and ensure separation of materials discharged from the inner and outer cylinders is of great practical significance. Utility Model Content

[0004] Due to the aforementioned defects in the existing technology, this utility model provides a device for a double-cylinder rotary kiln that can achieve efficient heat circulation between the inner and outer cylinders and ensure separation of material discharge from the inner and outer cylinders, specifically a waste heat recovery sealing device for a double-cylinder rotary kiln.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A waste heat recovery sealing device for a twin-cylinder rotary kiln includes an outer ring of the sealing cover, an inner ring of the sealing cover with an annular air duct, a rear cover of the sealing cover, and a cold air conveying axial flow fan.

[0007] The outer ring of the sealing cover is a cylindrical structure, and the rear cover of the sealing cover is a circular plate structure. The rear cover of the sealing cover is located at one end of the outer ring of the sealing cover and its plane is perpendicular to the axis of symmetry of the outer ring of the sealing cover. The outer edge of the rear cover of the sealing cover is connected to the inner wall of the outer ring of the sealing cover. The cold air conveying axial flow fan is installed inside the inner ring of the rear cover of the sealing cover.

[0008] The inner ring of the sealing cover is circular in shape and coaxial with the outer ring of the sealing cover. The inner ring of the sealing cover does not contact the back cover of the sealing cover. A partition device is provided between the inner ring of the sealing cover and the outer ring of the sealing cover to divide the space inside the outer ring of the sealing cover into two independent spaces. The top of the inner ring of the sealing cover is connected to the smoke exhaust channel, which extends out from the outer ring of the sealing cover. The bottom of the inner ring of the sealing cover is connected to the ash discharge pipe, which extends out from the outer ring of the sealing cover.

[0009] The bottom of the outer ring of the sealing cover has an inner cylinder outlet and an outer cylinder outlet located on both sides of the separating device.

[0010] This utility model discloses a waste heat recovery sealing device for a double-cylinder rotary kiln. Its structure is rationally designed, not only sealing the double-cylinder rotary kiln but also separating the materials in the inner and outer cylinders using an inner annular air duct within the sealing cover. The inner and outer cylinders of the double-cylinder rotary kiln are equipped with air ducts; the inner annular air duct of the sealing cover matches the outer cylinder, and the hollow part of the inner annular air duct matches the inner cylinder. A cold air conveying axial flow fan delivers air to the inner cylinder. The heated air flows through the inner cylinder, turns around at the other end of the rotary kiln, and flows into the outer cylinder. It then exits through the exhaust duct via the inner annular air duct. A dust discharge pipe is located below the inner annular air duct for easy cleaning. The outer ring of the sealing cover also has inner and outer cylinder discharge ports that match the inner and outer cylinders respectively, facilitating material discharge and preventing mixing of materials in the inner and outer cylinders. This device has significant application prospects.

[0011] As a preferred technical solution:

[0012] In the waste heat recovery sealing device for a double-cylinder rotary kiln as described above, the cold air conveying axial flow fan delivers air from the side of the rear cover of the sealing cover away from the outer ring of the sealing cover to the side of the outer ring of the sealing cover.

[0013] As described above, in a waste heat recovery sealing device for a twin-cylinder rotary kiln, the inner ring annular air duct of the sealing cover is located away from the opening on the rear cover side of the sealing cover.

[0014] As described above, in a waste heat recovery sealing device for a twin-cylinder rotary kiln, the inner ring annular air duct of the sealing cover extends from the opening side of the outer ring of the sealing cover.

[0015] As described above, in a waste heat recovery sealing device for a double-cylinder rotary kiln, the inner cylinder outlet is located near the rear cover of the sealing cover of the separating device.

[0016] The outer cylinder outlet is located on the side of the separator away from the rear cover of the sealing cover.

[0017] The above technical solution is only one feasible technical solution of this utility model. The protection scope of this utility model is not limited to this. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0018] Compared with the prior art, the above-mentioned utility model has the following advantages or beneficial effects:

[0019] (1) The waste heat recovery sealing device for the double-cylinder rotary kiln of this utility model has a reasonable structural design. It can not only seal the double-cylinder rotary kiln, but also use the inner ring of the sealing cover to separate the materials in the inner and outer cylinders. The inner and outer cylinders of the double-cylinder rotary kiln are equipped with air channels, wherein the inner ring of the sealing cover matches the outer cylinder, and the hollow part of the inner ring of the sealing cover matches the inner cylinder.

[0020] (2) The waste heat recovery sealing device for the double-cylinder rotary kiln of this utility model uses a cold air conveying axial flow fan to send air to the inner cylinder. After the air is heated, it flows through the inner cylinder, turns around at the other end of the rotary kiln and flows into the outer cylinder, and then is discharged from the exhaust channel through the inner ring of the sealing cover.

[0021] (3) The waste heat recovery sealing device for the double-cylinder rotary kiln of this utility model is equipped with an ash discharge pipe below the inner ring of the sealing cover to facilitate cleaning of the air duct. The outer ring of the sealing cover is also equipped with inner and outer cylinder discharge ports that match the inner and outer cylinders respectively, which facilitates the discharge of materials from the inner and outer cylinders and avoids mixing of materials from the inner and outer cylinders. It has great application prospects. Attached Figure Description

[0022] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn strictly to scale; the focus is on illustrating the main idea of ​​the invention.

[0023] Figure 1 This is a front view of the waste heat recovery sealing device for a double-cylinder rotary kiln according to this utility model;

[0024] Figure 2 This is a right view of the waste heat recovery sealing device for a double-cylinder rotary kiln according to this utility model;

[0025] Among them, 1 is the outer ring of the sealing cover, 2 is the inner ring annular air duct of the sealing cover, 3 is the smoke exhaust channel, 4 is the cold air conveying axial flow fan, 5 is the inner cylinder discharge port, 6 is the ash discharge pipe, and 7 is the outer cylinder discharge port. Detailed Implementation

[0026] The structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the utility model.

[0027] Example 1

[0028] A waste heat recovery sealing device for a double-cylinder rotary kiln, such as Figures 1-2 As shown, it includes an outer ring of the sealing cover 1, an inner ring of the sealing cover annular air duct 2, a rear cover of the sealing cover, and a cold air conveying axial flow fan 4;

[0029] The outer ring 1 of the sealing cover is a cylindrical structure, and the rear cover of the sealing cover is a circular plate structure. The rear cover of the sealing cover is located at one end of the outer ring 1 of the sealing cover and its plane is perpendicular to the axis of symmetry of the outer ring 1 of the sealing cover. The outer edge of the rear cover of the sealing cover is connected to the inner wall of the outer ring 1 of the sealing cover. The cold air conveying axial flow fan 4 is installed in the inner ring of the rear cover of the sealing cover. The cold air conveying axial flow fan 4 delivers air from the side of the rear cover of the sealing cover away from the outer ring 1 of the sealing cover to the side of the outer ring 1 of the sealing cover.

[0030] The inner ring air duct 2 of the sealing cover is circular in shape and coaxial with the outer ring 1 of the sealing cover. The inner ring air duct 2 does not contact the back cover of the sealing cover. The inner ring air duct 2 is far from the opening of the back cover of the sealing cover. The inner ring air duct 2 extends from the opening of the outer ring 1 of the sealing cover. There is also a partition device between the inner ring air duct 2 and the outer ring 1 of the sealing cover to divide the space inside the outer ring 1 of the sealing cover into two independent spaces. The top of the inner ring air duct 2 is connected to the smoke exhaust channel 3 and the smoke exhaust channel 3 passes through the outer ring 1 of the sealing cover. The bottom of the inner ring air duct 2 is connected to the ash discharge pipe 6 and the ash discharge pipe 6 passes through the outer ring 1 of the sealing cover.

[0031] The bottom of the outer ring 1 of the sealing cover has an inner cylinder outlet 5 and an outer cylinder outlet 7 located on both sides of the separating device. The inner cylinder outlet 5 is located on the side of the separating device near the rear cover of the sealing cover, and the outer cylinder outlet 7 is located on the side of the separating device away from the rear cover of the sealing cover.

[0032] The operating logic of the waste heat recovery sealing device for the above-mentioned twin-cylinder rotary kiln is as follows:

[0033] The inner ring of the sealing cover separates the materials in the inner and outer cylinders. The inner and outer cylinders of the double-cylinder rotary kiln are equipped with air ducts. The inner ring of the sealing cover matches the outer cylinder, and the hollow part of the inner ring of the sealing cover matches the inner cylinder. A cold air conveying axial flow fan delivers air to the inner cylinder. After the air is heated, it flows through the entire inner cylinder and turns around at the other end of the rotary kiln to flow into the outer cylinder. Then it is discharged from the exhaust channel through the inner ring of the sealing cover. A dust discharge pipe is provided below the inner ring of the sealing cover for easy cleaning of the air duct. The outer ring of the sealing cover is also equipped with inner and outer cylinder discharge ports that match the inner and outer cylinders respectively, which facilitates material discharge and avoids mixing of materials in the inner and outer cylinders.

[0034] Verification has shown that the waste heat recovery sealing device for the double-cylinder rotary kiln of this invention has a reasonable structural design. It can not only seal the double-cylinder rotary kiln, but also separate the materials in the inner and outer cylinders using the annular air duct inside the sealing cover. The inner and outer cylinders of the double-cylinder rotary kiln are equipped with air ducts, with the annular air duct inside the sealing cover matching the outer cylinder, and the hollow part of the annular air duct inside the sealing cover matching the inner cylinder. A cold air conveying axial flow fan delivers air to the inner cylinder. After the air is heated, it flows through the inner cylinder, turns around at the other end of the rotary kiln and flows into the outer cylinder, and then is discharged from the exhaust channel through the annular air duct inside the sealing cover. An ash discharge pipe is provided below the annular air duct inside the sealing cover for easy cleaning of the air duct. The outer ring of the sealing cover is also equipped with inner and outer cylinder discharge ports that match the inner and outer cylinders respectively, which facilitates the discharge of materials from the inner and outer cylinders and avoids mixing of materials in the inner and outer cylinders. It has great application prospects.

[0035] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0036] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A waste heat recovery sealing device for a double-cylinder rotary kiln, characterized in that: This includes the outer ring of the sealing cover, the inner ring of the sealing cover annular air duct, the rear cover of the sealing cover, and the axial flow fan for cold air delivery; The outer ring of the sealing cover is a cylindrical structure, and the rear cover of the sealing cover is a circular plate structure. The rear cover of the sealing cover is located at one end of the outer ring of the sealing cover and its plane is perpendicular to the axis of symmetry of the outer ring of the sealing cover. The outer edge of the rear cover of the sealing cover is connected to the inner wall of the outer ring of the sealing cover. The cold air conveying axial flow fan is installed inside the inner ring of the rear cover of the sealing cover. The inner ring of the sealing cover is circular in shape and coaxial with the outer ring of the sealing cover. The inner ring of the sealing cover does not contact the back cover of the sealing cover. A partition device is provided between the inner ring of the sealing cover and the outer ring of the sealing cover to divide the space inside the outer ring of the sealing cover into two independent spaces. The top of the inner ring of the sealing cover is connected to the smoke exhaust channel, which extends out from the outer ring of the sealing cover. The bottom of the inner ring of the sealing cover is connected to the ash discharge pipe, which extends out from the outer ring of the sealing cover. The bottom of the outer ring of the sealing cover has an inner cylinder outlet and an outer cylinder outlet located on both sides of the separating device.

2. The waste heat recovery sealing device for a double-cylinder rotary kiln according to claim 1, characterized in that, The cold air conveying axial flow fan delivers air from the side of the rear cover away from the outer ring of the sealing cover to the side of the outer ring of the sealing cover.

3. The waste heat recovery sealing device for a double-cylinder rotary kiln according to claim 1, characterized in that, The inner ring of the sealing cover has an annular air duct that is away from the opening on the back cover of the sealing cover.

4. A waste heat recovery sealing device for a double-cylinder rotary kiln according to claim 3, characterized in that, The inner ring of the sealing cover has an annular air duct extending from the opening side of the outer ring of the sealing cover.

5. A waste heat recovery sealing device for a double-cylinder rotary kiln according to claim 1, characterized in that, The inner cylinder outlet is located near the rear cover of the sealing cover of the separator; The outer cylinder outlet is located on the side of the separator away from the rear cover of the sealing cover.

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