Reducing type electromagnetic heating rotary kiln

Abstract

The utility model discloses a variable-diameter electromagnetic heating rotary kiln, which belongs to the technical field of rotary kiln heating, comprises a kiln body, a heating part is provided with a charging barrel extending axially, and an electromagnetic heating coil rack is rotatably connected and sleeved on the outer side of the charging barrel, and is characterized in that an electromagnetic heating coil is formed by combining a preset number of independent electromagnetic heating coil units; the independent electromagnetic heating coil unit comprises an electromagnetic heating coil rack and an electromagnetic heating coil; the charging barrel comprises a heating tube pass and a heat preservation tube pass; the rotary kiln has the advantages that the inner diameter of the charging barrel of the heat preservation tube pass is larger than that of the charging barrel of the heat preservation tube pass, on the premise that the occupied area is not increased, the calcination time of materials in the rotary kiln is prolonged, and the calcination capacity is improved; and the lifting plate ensures that enough calcining time is reserved for the materials in the rotary kiln under the condition that the materials are turned over, so that the materials are more uniform.

Description

Technical fields:

[0001] This utility model belongs to the field of rotary kiln heating technology, and more specifically relates to a variable diameter electromagnetic heating rotary kiln. Background technology:

[0002] A rotary kiln is an important heat treatment equipment, mainly used in coke production and biomass pyrolysis. Gears and reducers are installed at the bottom of the gas rotary kiln. The gears are driven by a motor, which in turn drives the kiln body to rotate. At the same time, gas enters the bottom of the furnace body and is sent into the kiln by a gas exhaust fan.

[0003] Rotary kilns require sufficient temperature for heat exchange during pyrolysis. Using traditional coal-fired or gas-fired heating methods results in the emission of large amounts of carbon dioxide, causing environmental pollution.

[0004] Utility model patent No. 202322534104.8 discloses an electromagnetic heating device for a rotary kiln, which effectively solves the above problems. It utilizes electromagnetic induction to heat the rotary kiln. The principle of electromagnetic heating is that an alternating magnetic field is generated by an electromagnetic heating coil. When an iron-containing container is placed on it, the surface of the container cuts the alternating magnetic field lines, generating an alternating current (i.e., eddy current) in the metal part at the bottom of the container. The eddy current causes the charge carriers at the bottom of the container to move at high speed and randomly. The charge carriers collide and rub against each other with atoms, generating heat energy, thereby heating the items.

[0005] This structure is only applicable to general physics. For materials that are not easy to calcine, it will lead to insufficient calcine. Simply extending the length of the barrel to prolong the calcine time will result in excessively long equipment and a large footprint. Utility model content:

[0006] To solve the above problems and overcome the shortcomings of the existing technology, this utility model provides a variable diameter electromagnetic heating rotary kiln;

[0007] The first technical problem to be solved is that existing electromagnetically heated rotary kilns can lead to insufficient calcination of materials that are not easy to calcine, and simply extending the length of the barrel to prolong the calcination time will result in excessively long equipment and a large footprint.

[0008] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: a variable diameter electromagnetic heating rotary kiln, including a kiln body, wherein the kiln body is provided with a feeding section, a heating section and a discharging section in sequence from front to back; the heating section has an axially extending material cylinder; an electromagnetic heating coil frame is rotatably connected and sleeved on the outside of the material cylinder; the material cylinder is supported and rotated by a material cylinder support frame; the electromagnetic heating coil frame located outside the material cylinder is wound with an electromagnetic heating coil composed of hollow spiral wire; after being energized, the electromagnetic heating coil induces eddy currents in the material cylinder shell through electromagnetic induction, thereby heating the material cylinder shell; characterized in that:

[0009] The electromagnetic heating coil is composed of a preset number of independent electromagnetic heating coil units, and each independent electromagnetic heating coil unit includes an electromagnetic heating coil frame and an electromagnetic heating coil.

[0010] The barrel includes a heating tube side and an insulation tube side; the inner diameters of the heating tube side and the insulation tube side of the barrel are different.

[0011] The inner wall of the material cylinder of the insulation pipe is equipped with lifting plates. The lifting plates are L-shaped and are arranged symmetrically and alternately along the axis of the insulation pipe.

[0012] Furthermore, the inner diameter of the barrel in the insulation tube side is larger than the inner diameter of the heating tube side.

[0013] Furthermore, the adjacent electromagnetic heating coil units of the insulated tube's barrel adopt a cross-phase power supply structure to form a moving magnetic field.

[0014] Furthermore, the feeding section is provided with a feeding port and a conveying pipe, the front end of the conveying pipe is connected to the feeding port, and the rear end of the conveying pipe is connected to the heating section.

[0015] Furthermore, the adjacent lifting plates are arranged symmetrically and alternately on the inner wall of the insulation pipe.

[0016] Furthermore, the lifting plate is L-shaped, and the corners of the L-shape are rounded.

[0017] Furthermore, the material cylinder has an inclination that is higher at the front and lower at the back.

[0018] The beneficial effects of this utility model are:

[0019] One advantage of this utility model is that it provides a variable diameter electromagnetic heating rotary kiln, in which the inner diameter of the material cylinder in the heat-insulating tube side is larger than the inner diameter of the heating tube side. Without increasing the floor space, it extends the calcination time of the material in the rotary kiln and improves the calcination capacity.

[0020] One advantage of this invention is that it provides a lifting plate, which ensures that the material has sufficient calcination time in the rotary kiln while turning the material, making the material more uniform. Attached image description:

[0021] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Appendix Figure 2 This is a schematic diagram of the lifting plate structure of this utility model; in the attached drawing:

[0023] 1. Feeding section; 2. Barrel support frame; 3. Power structure; 4. Electromagnetic heating coil frame; 5. Electromagnetic heating coil; 6. Barrel; 7. Heating tube side; 8. Insulation tube side; 9. Discharge section; 10. Lifting plate. Detailed implementation method:

[0024] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] The specific embodiment of this utility model is as follows: The variable diameter electromagnetic heating rotary kiln includes a kiln body. The kiln body is arranged sequentially from front to back as a feeding section 1, a heating section, and a discharging section 9. The feeding section 1 is provided with a feeding inlet and a conveying pipe. The front end of the conveying pipe is connected to the feeding inlet, and the rear end of the conveying pipe is connected to the heating section. The heating section has an axially extending material cylinder 6. An electromagnetic heating coil frame 4 is rotatably connected and sleeved on the outside of the material cylinder 6. The material cylinder 6 is supported and rotated by a material cylinder support frame 2. The electromagnetic heating coil frame 4 located outside the material cylinder 6 is wound with an electromagnetic heating coil 5 composed of hollow spiral wire. The improvement of this utility model is as follows:

[0026] The electromagnetic heating coil 5 is composed of a preset number of independent electromagnetic heating coil units, each of which includes an electromagnetic heating coil frame 4 and an electromagnetic heating coil 5; thus, temperature control of multiple independent zones can be achieved, enabling multi-segment zone heating.

[0027] The material cylinder 6 includes a heating tube side 7 and a heat-insulating tube side 8. The inner diameters of the material cylinder 6 in the heating tube side 7 and the heat-insulating tube side 8 are different. The inner diameter of the material cylinder 6 in the heat-insulating tube side 8 is larger than that in the heating tube side 7. This variable diameter form can increase the capacity of the heat-insulating tube side 8. Without increasing the floor space, it can extend the calcination time of the material in the rotary kiln and improve the calcination capacity.

[0028] However, this structure also has its drawbacks, such as uneven heating of the internal materials. To compensate for these drawbacks, the inner wall of the material cylinder 6 of the insulation tube 8 of this invention is provided with lifting plates 10. The lifting plates 10 are L-shaped, and adjacent lifting plates 10 are staggered and symmetrically arranged along the axis of the insulation tube 8. This ensures that the material is turned over while allowing sufficient calcination time in the rotary kiln, making the material more uniform.

[0029] Furthermore, the adjacent lifting plates 10 are arranged symmetrically and alternately on the inner wall of the insulation pipe 8.

[0030] Furthermore, the lifting plate 10 is L-shaped, and the corners of the L-shape are rounded.

[0031] Furthermore, the material cylinder 6 has an inclination that is higher at the front and lower at the back, which ensures that the material is unloaded by gravity.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A variable-diameter electromagnetic heating rotary kiln, comprising a kiln body, wherein the kiln body is provided with a feeding section (1), a heating section and a discharging section (9) arranged sequentially from front to back, wherein the heating section has an axially extending material cylinder (6), an electromagnetic heating coil frame (4) is rotatably connected and sleeved on the outside of the material cylinder (6), the material cylinder (6) is supported and rotated by a material cylinder support frame (2), and the electromagnetic heating coil frame (4) located outside the material cylinder (6) is wound with an electromagnetic heating coil (5) composed of a hollow spiral wire, characterized in that: The electromagnetic heating coil (5) is composed of a preset number of independent electromagnetic heating coil units, and the independent electromagnetic heating coil unit includes an electromagnetic heating coil frame (4) and an electromagnetic heating coil (5); The barrel (6) includes a heating tube side (7) and an insulation tube side (8); the inner diameters of the barrel (6) for the heating tube side (7) and the insulation tube side (8) are different. The inner wall of the material cylinder (6) of the insulation pipe (8) is provided with lifting plates (10). The lifting plates (10) are L-shaped, and the adjacent lifting plates (10) are staggered and symmetrically arranged along the axis of the insulation pipe (8).

2. The variable diameter electromagnetic heating rotary kiln according to claim 1, characterized in that... The inner diameter of the barrel (6) of the insulation tube (8) is larger than the inner diameter of the heating tube (7).

3. The variable diameter electromagnetic heating rotary kiln according to claim 1, characterized in that... The feeding section (1) is provided with a feeding port and a conveying pipe. The front end of the conveying pipe is connected to the feeding port, and the rear end of the conveying pipe is connected to the heating section.

4. The variable diameter electromagnetic heating rotary kiln according to claim 1, characterized in that... The adjacent lifting plates (10) are symmetrically arranged on the inner wall of the insulation pipe (8).

5. The variable diameter electromagnetic heating rotary kiln according to claim 1, characterized in that... The lifting plate (10) is L-shaped, and the corners of the L-shape are rounded.

6. The variable diameter electromagnetic heating rotary kiln according to claim 1, characterized in that... The material cylinder (6) has an inclination that is higher in the front and lower in the back.

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