Energy-saving air supply cover device of rotary kiln

Abstract

The utility model belongs to the technical field of rotary kilns, and particularly discloses a rotary kiln energy-saving air supply cover device which comprises a rotary kiln, an air inlet communicated with a heat exchange channel is formed in the middle of a kiln body, an air supply box of an annular hollow structure is arranged on the outer side of the air inlet of the kiln body in a sleeved mode, and a plurality of air outlets are formed in the position, facing the air inlet of the kiln body, of the air supply box. The air supply box is fixed to the ground through a supporting mechanism, a sealing piece is arranged between the contact faces of the air supply box and the kiln body, the air supply box is connected with an air supply pipe, the air inlet end of the air supply pipe is connected with a heat exchange fan, and the air outlet end of the air supply pipe is communicated with a cavity of the air supply box. The heat exchange fan feeds fresh air into the air supply box through the air supply pipe, the fresh air sequentially passes through the air outlet of the air supply box and the air inlet of the kiln body and then enters the heat exchange channel, waste heat is used for heating the air in the heat exchange channel, waste heat utilization is achieved, and the sealing effect between the air supply box and the kiln body is improved through the sealing piece. And the waste heat utilization effect in the roasting process is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary kilns, and specifically discloses an energy-saving air supply cover device of a rotary kiln. Background Art

[0002] The rotary kiln is a key equipment in the cement, metallurgy, chemical industry and other industries. It is often used in high-temperature reactions in the building materials, metallurgy, chemical industry and other industries, such as calcination, sintering, drying, etc. The energy-saving roasting process of the molybdenum concentrate roasting rotary kiln requires the utilization of the waste heat in the roasting process, so it is necessary to configure the air supply system. The air supply system is an important part of the rotary kiln. The air supply system is of great significance to the entire process parameters of the rotary kiln and the efficient operation of the equipment. It determines the operation effect and product quality of the rotary kiln. The air supply volume and wind speed need to be strictly controlled to achieve the best production efficiency and product quality. The air supply system includes an air supply box and related auxiliary facilities. Since the rotary kiln is a rotating equipment, if the air supply box is set with the rotary kiln, other related auxiliary facilities will be very complicated. If the air supply box is fixed, the sealing of the air supply box and the rotary kiln is the key factor in determining the utilization of waste heat. Summary of the invention

[0003] In order to solve the problems in the background technology, the utility model discloses an energy-saving air supply hood device for a rotary kiln, including an air supply box mounted on a kiln body, a sealing member is arranged between the air supply box and the kiln body, so as to improve the sealing performance of the connection between the air supply box and the kiln body, increase the air supply volume, and improve the production efficiency and product quality of the product.

[0004] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0005] A rotary kiln energy-saving air supply hood device comprises a rotary kiln, a heat exchange channel is arranged between the kiln wall and adjacent to the kiln tail hood, an air inlet connected to the heat exchange channel is arranged in the middle of the kiln body, an air supply box with an annular hollow structure is sleeved on the outer side of the kiln body air inlet, a plurality of air outlets are arranged at the position of the air supply box facing the kiln body air inlet, the air supply box is fixed to the ground by a supporting mechanism, a sealing member is arranged between the contact surface of the air supply box and the kiln body, the sealing member can ensure dynamic sealing between the air supply box and the kiln body, an air supply pipe is connected to the air supply box, the air inlet end of the air supply pipe is connected to a heat exchange fan, and the air outlet end of the air supply pipe is connected to the cavity of the air supply box.

[0006] Furthermore, in the energy-saving air supply hood device of the rotary kiln, the sealing component includes annular connecting plates arranged on the left and right sides of the air supply box, the connecting plates are respectively fixedly connected to the outer wall of the kiln body, an inner baffle plate is respectively fixedly connected to the side of the connecting plate facing the air supply box, and an outer baffle plate is respectively fixedly connected to the side of the connecting plate facing away from the air supply box, a first annular groove is jointly formed between the connecting plate and the corresponding inner baffle plate and outer baffle plate, a sealing baffle is movably arranged in the first annular groove, and the sealing baffles are respectively fixedly connected to the air supply box.

[0007] Furthermore, the energy-saving air supply hood device of the rotary kiln has a supporting mechanism comprising annular brackets spaced apart on the left and right sides of the air supply box, the lower portion of the annular brackets being fixedly connected to a fixed bracket fixed on the ground, a plurality of rollers being spaced apart along the circumferential direction between the annular brackets, and supporting wheels which are tightly attached to the outer wall of the air supply box being rotatably connected to the rollers.

[0008] Furthermore, the rotary kiln energy-saving air supply cover device has a plurality of positioning blocks fixedly provided on the side walls on the left and right sides of the air supply box, and the other ends of the positioning blocks are rotatably connected with positioning sleeves abutting against the outer baffle.

[0009] Furthermore, the rotary kiln energy-saving air supply hood device is provided with a second annular groove and a third annular groove radially spaced apart on the inner side wall of the outer baffle plate, and sealing gaskets are fixedly arranged in the second annular groove and the third annular groove respectively, and the sealing gaskets are tightly fitted with the outer side wall of the corresponding sealing baffle plate.

[0010] Furthermore, in the rotary kiln energy-saving air supply hood device, the sealing baffle is a thin stainless steel plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model discloses an energy-saving air supply hood device for a rotary kiln, wherein an air supply box with an annular hollow structure is sleeved on the outer side of an air inlet of a kiln body, a plurality of air outlets are arranged at a position of the air supply box facing the air inlet of the kiln body, the air supply box is fixed to the ground by a supporting mechanism, a sealing member is arranged between the contact surface of the air supply box and the kiln body, the sealing member can ensure the dynamic sealing between the air supply box and the kiln body, an air supply pipe is connected to the air supply box, the air inlet end of the air supply pipe is connected to a heat exchange fan, the air outlet end of the air supply pipe is communicated with the cavity of the air supply box, waste heat is used to heat and raise the temperature of air in the heat exchange channel, and waste heat is utilized, and the sealing effect between the air supply box and the kiln body is increased by the sealing member, the problem of connection and sealing between the kiln body and the air supply device is solved, and the effect of waste heat utilization during roasting is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a side view structural schematic diagram of the utility model;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of the local A in the middle;

[0017] In the figure: 1. air supply box; 2. kiln body; 3. connecting plate; 4. inner baffle; 5. outer baffle; 6. sealing baffle; 7. air supply pipe; 8. fixed bracket; 9. ring bracket; 10. roller; 11. supporting wheel; 12. positioning block; 13. sealing gasket. DETAILED DESCRIPTION

[0018] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with embodiments, but the content of the present invention is not limited to the following embodiments.

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. In addition, a brief description is given of the orientation involved in this specific implementation: the directions or positional relationships indicated by "front", "rear", "up", "down", "left", "right", etc., of each structural member mentioned below refer to the orientation or positional relationship shown in the accompanying drawings; these positional relationships are only for the convenience of description and simplified description, and do not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. If there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.

[0020] Combined with Figure 1-4, the utility model is described in detail, an energy-saving air supply hood device for a rotary kiln, including a rotary kiln, a heat exchange channel is arranged between the walls of the rotary kiln body 2 and adjacent to the kiln tail hood, it should be noted here that the heat exchange channel is provided by the rotary kiln body 2 and is there at the initial stage of equipment construction, which is common knowledge for those skilled in the art, an air inlet connected to the heat exchange channel is arranged in the middle of the kiln body, an air supply box 1 with an annular hollow structure is sleeved on the outer side of the air inlet of the kiln body 2, a plurality of air outlets are arranged at the position of the air supply box 1 facing the air inlet of the kiln body 2, the air supply box 1 is fixed to the ground by a supporting mechanism, a sealing member is arranged between the contact surface of the air supply box 1 and the kiln body 2, the sealing member can ensure the dynamic sealing between the air supply box 1 and the kiln body 2, and a sealing member is connected to the air supply box 1 An air supply pipe 7 is connected, and the air inlet end of the air supply pipe 7 is connected to a heat exchange fan. The start and stop of the heat exchange fan is controlled by a control system. The air outlet end of the air supply pipe 7 is connected to the cavity of the air supply box 1. When working, the kiln body 2 rotates around the central axis relative to the kiln tail cover, and the air supply box 1 is fixed. During the process of kiln body 2 roasting products, the heat causes the wall of the kiln body 2 to heat up. The heat exchange fan sends fresh air into the cavity of the air supply box 1 through the air supply pipe 7. The fresh air enters the heat exchange channel after passing through the air outlet of the air supply box 1 and the air inlet of the kiln body 2 in turn. The heat of the wall of the kiln body 2 is used to heat and heat the air in the heat exchange channel to achieve waste heat utilization. The sealing effect between the air supply box 1 and the kiln body 2 is increased through the sealing component, the connection and sealing problems between the kiln body 2 and the air supply device are solved, and the effect of waste heat utilization during roasting is improved.

[0021] As an optional design, the rotary kiln energy-saving air supply hood device is preferred, and the sealing component includes annular connecting plates 3 arranged on the left and right sides of the air supply box 1, and the connecting plates 3 are respectively fixedly connected to the outer wall of the kiln body 2, and inner baffle plates 4 are respectively fixedly connected to the side of the connecting plate 3 facing the air supply box 1, and outer baffle plates 5 are respectively fixedly connected to the side of the connecting plate 3 facing away from the air supply box 1, and a first annular groove is jointly formed between the connecting plate 3 and the corresponding inner baffle plates 4 and outer baffle plates 5, and a sealing baffle 6 is movably arranged in the first annular groove, and the sealing baffles 6 are respectively fixedly connected to the air supply box 1. Through the sealing component, the sealing effect between the air supply box 1 and the kiln body 2 can be increased, and the problem of sealing the connection between the kiln body 2 and the air supply device is solved, thereby improving the effect of waste heat utilization during roasting.

[0022] As an optional design, the energy-saving air supply hood device of the rotary kiln is preferred, and the supporting mechanism includes annular brackets 9 arranged at intervals on the left and right sides of the air supply box 1, the diameter of the annular brackets 9 is larger than the diameter of the air supply box 1, and the lower part of the annular brackets 9 is fixedly connected to a fixed bracket 8 fixed on the ground, and a plurality of rollers 10 are arranged at intervals along the circumferential direction between the annular brackets 9, and supporting wheels 11 tightly attached to the outer wall of the air supply box 1 are rotatably connected to the rollers 10. Through the supporting mechanism, when the rotary kiln cylinder slides slightly axially under high temperature, the air supply box 1 can move synchronously with it, and its relative position with the rotary kiln remains unchanged, thereby ensuring the reliability of the sealing of the air supply box 1.

[0023] As an optional design, the rotary kiln energy-saving air supply hood device is preferably provided with a plurality of positioning blocks 12 fixedly provided on the side walls on the left and right sides of the air supply box 1, and positioning sleeves abutting against the outer baffle plate 5 are rotatably connected at the other ends of the positioning blocks 12, so that the outer baffle plate 5 is limited by the positioning blocks 12 and the positioning sleeves.

[0024] As an optional design, the rotary kiln energy-saving air supply hood device is preferably provided with a second annular groove and a third annular groove radially spaced apart on the inner wall of the outer baffle plate 5, and sealing gaskets 13 are fixedly arranged in the second annular groove and the third annular groove respectively, and the sealing gasket 13 is tightly fitted with the outer side wall of the corresponding sealing baffle plate 6, and the sealing gasket 13 is made of high temperature resistant material to extend the service life of the sealing gasket 13.

[0025] As an optional design, the energy-saving air supply hood device of the rotary kiln is preferred, and the sealing baffle 6 is a thin stainless steel plate, which is connected to the sealing gasket 13 through the elasticity of the sealing baffle 6 to improve the sealing effect.

[0026] The working process of the utility model is as follows:

[0027] When supplying air, the control system starts the heat exchange fan, so that the outside air enters the air supply box 1 through the air supply pipe 7, and then enters the heat exchange channel between the walls of the kiln body 2 through the air inlet of the kiln body 2, and the waste heat is used to heat the air entering the heat exchange channel;

[0028] When the kiln body 2 rotates, the connecting plate 3, the inner baffle plate 4 and the outer baffle plate 5 rotate synchronously with the kiln body 2, and the sealing baffle plate 6 is fixed to the fixed bracket 8 through the air supply box 1 to avoid the problem of poor sealing between the kiln body 2 and the air supply box 1 when the kiln body 2 rotates.

[0029] The above description is only an application implementation method of the present utility model, but the protection scope of the present utility model is not limited to this, and the right scope of the present utility model cannot be limited by this. Any equivalent changes made according to the technical solution of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A rotary kiln energy-saving air supply hood device, comprising a rotary kiln, a heat exchange channel is arranged between the kiln body wall and adjacent to the kiln tail hood, and an air inlet connected to the heat exchange channel is arranged in the middle of the kiln body, wherein: An air supply box with an annular hollow structure is sleeved on the outer side of the air inlet of the kiln body, and a plurality of air outlets are arranged at the position of the air supply box facing the air inlet of the kiln body. The air supply box is fixed to the ground by a supporting mechanism, and a sealing member is arranged between the contact surfaces of the air supply box and the kiln body. The sealing member can ensure the dynamic sealing between the air supply box and the kiln body. An air supply pipe is connected to the air supply box, and a heat exchange fan is connected to the air inlet end of the air supply pipe, and the air outlet end of the air supply pipe is connected to the cavity of the air supply box.

2. The energy-saving air supply hood device of the rotary kiln according to claim 1 is characterized in that: The sealing member comprises annular connecting plates arranged on the left and right sides of the air supply box, the connecting plates are respectively fixedly connected to the outer wall of the kiln body, an inner baffle is respectively fixedly connected to the side of the connecting plate facing the air supply box, and an outer baffle is respectively fixedly connected to the side of the connecting plate facing away from the air supply box, a first annular groove is formed between the connecting plate and the corresponding inner baffle and outer baffle, a sealing baffle is movably arranged in the first annular groove, and the sealing baffle is respectively fixedly connected to the air supply box.

3. The energy-saving air supply hood device of the rotary kiln according to claim 2 is characterized in that: The supporting mechanism includes annular brackets arranged at intervals on the left and right sides of the air supply box. The lower part of the annular brackets is fixedly connected to a fixed bracket fixed on the ground. A plurality of rollers are arranged at intervals along the circumferential direction between the annular brackets, and support wheels tightly attached to the outer wall of the air supply box are rotatably connected to the rollers.

4. The energy-saving air supply hood device of the rotary kiln according to claim 3 is characterized in that: A plurality of positioning blocks are fixedly arranged on the side walls on the left and right sides of the air supply box, respectively, and the other ends of the positioning blocks are rotatably connected with positioning sleeves abutting against the outer baffle.

5. The energy-saving air supply hood device for a rotary kiln according to claim 3 is characterized in that: A second annular groove and a third annular groove are recessed and spaced apart in the radial direction on the inner side wall of the outer baffle plate. Sealing gaskets are fixedly arranged in the second annular groove and the third annular groove respectively. The sealing gaskets are tightly fitted with the outer side wall of the corresponding sealing baffle plate.

6. The energy-saving air supply hood device for a rotary kiln according to claim 3 is characterized in that: The sealing baffle is a thin stainless steel plate.

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