Rotary kiln with preheater

Abstract

The utility model provides a rotary kiln with a preheater, and relates to the field of rotary kilns, the rotary kiln with the preheater comprises a rotary kiln body, a conveying mechanism and a preheating assembly, and the preheating assembly comprises an outer cover, a guide rail and a plurality of preheating heaters. Cement raw materials are conveyed to the rotary kiln body through the conveying mechanism, in the conveying process, natural gas is introduced from the inlet pipe, then the natural gas is heated in the first porous medium layer, in the heating process of the preheating heater, heating is conducted in a non-open-fire heat radiation mode, the heating temperature is uniform, and the heating efficiency is improved. In the preheating process, the heating temperature of the preheating heater can be adjusted according to the natural gas introducing speed, in the preheating process, generation of nitric oxide can be effectively reduced, cement is preheated, the heating time in the rotary kiln body can be effectively shortened, and the cement production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of rotary kilns, and in particular to a rotary kiln with a preheater. Background Art

[0002] A rotary kiln is a type of calcining building material equipment. Usually, rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the materials they process. In many production industries such as building materials, metallurgy, chemicals, and environmental protection, rotary kilns widely use rotary cylinder equipment to perform mechanical, physical or chemical treatment on solid materials. It is mainly used as a smelting equipment to calcine some metal ores. At present, the raw materials are directly put into the rotary kiln for heating during the production process, and the heating time is long, resulting in low production efficiency. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a rotary kiln with a preheater, which can solve the technical problem that the raw materials of the rotary kiln cannot be preheated.

[0004] The embodiment of the present application provides a rotary kiln with a preheater, comprising a rotary kiln body, a conveying mechanism and a preheating component, wherein the preheating component comprises an outer cover, a guide rail, and a plurality of preheating heaters, the conveying mechanism is installed on the side of the rotary kiln body, the outer cover is installed above the conveying mechanism, the guide rail is welded to the inner wall of the outer cover, the preheating heater comprises an outer shell, a first porous medium layer, a first heat storage body, and an air inlet pipe, the outer shell is provided with a slider used in conjunction with the guide rail, the first heat storage body and the first porous medium layer are installed in the inner shell from top to bottom in sequence, the air inlet pipe is installed above the outer shell, and the plurality of preheating heaters are evenly arranged above the conveying mechanism.

[0005] Preferably, a heating mechanism is provided below the conveying mechanism, and a plurality of heating mechanisms are provided.

[0006] Preferably, a second porous medium layer and a second heat storage body are provided inside the heating mechanism.

[0007] Preferably, the first heat storage body and the second heat storage body are arranged in a foam shape, and the first heat storage body and the second heat storage body are made of ceramic material by slurry coating and firing.

[0008] Preferably, the preheating heater and the heating mechanism are both provided with air distribution plates.

[0009] Preferably, the conveying mechanism is made of high-temperature resistant heat-conductive material, and blocking members are provided on both sides of the conveying mechanism.

[0010] Preferably, the inner wall of the outer cover is provided with a thermal insulation layer, the thickness of the thermal insulation layer is 5-10 cm, and the thermal insulation layer is made of aluminum oxide.

[0011] Beneficial effects of the utility model:

[0012] The utility model provides a rotary kiln with a preheater, comprising a rotary kiln body, a conveying mechanism and a preheating component, wherein the preheating component comprises an outer cover, a guide rail and a plurality of preheating heaters, wherein the conveying mechanism is installed on the side of the rotary kiln body, the outer cover is installed above the conveying mechanism, the guide rail is welded to the inner wall of the outer cover, the preheating heater comprises an outer shell, a first porous medium layer, a first heat storage body and an air inlet pipe, the outer shell is provided with a slider used in conjunction with the guide rail, the first heat storage body and the first porous medium layer are sequentially installed inside the outer shell from top to bottom, the air inlet pipe is installed above the outer shell, and the plurality of preheating heaters are The utility model is evenly arranged above the conveying mechanism. During use, the raw materials of cement are transported to the rotary kiln body through the conveying mechanism. During the transportation process, natural gas is introduced from the inlet pipe, and then the natural gas is heated in the first porous medium layer. During the heating process, the preheating heater is heated in a non-open flame heat radiation manner. The heating temperature is uniform, and the heating temperature of the preheating heater can be adjusted by the rate of introducing natural gas. During the preheating process, the utility model can effectively reduce the generation of nitrogen oxides and preheat the cement principle, which can effectively shorten the heating time inside the rotary kiln body and improve the efficiency of cement production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] The reference numerals are:

[0016] 1. Rotary kiln body; 2. Conveying mechanism; 3. Preheating assembly; 4. Outer cover; 5. Guide rail; 6. Preheating heater; 7. Outer shell; 8. First porous medium layer; 9. First heat storage body; 10. Air inlet pipe; 11. Sliding block; 12. Heating mechanism; 13. Second porous medium layer; 14. Second heat storage body; 15. Air distribution plate; 16. Thermal insulation layer. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] like Figure 1As shown, a rotary kiln with a preheater comprises a rotary kiln body 1, a conveying mechanism 2 and a preheating assembly 3, wherein the preheating assembly 3 comprises an outer cover 4, a guide rail 5, and a plurality of preheating heaters 6, wherein the conveying mechanism 2 is installed on the side of the rotary kiln body 1, the outer cover 4 is installed above the conveying mechanism 2, the guide rail 5 is welded to the inner wall of the outer cover 4, the preheating heater 6 comprises an outer shell 7, a first porous medium layer 8, a first heat storage body 9, and an air inlet pipe 10, wherein a slider 11 used in conjunction with the guide rail 5 is provided on the outer shell 7, the first heat storage body 9 and the first porous medium layer 8 are sequentially installed inside the outer shell 7 from top to bottom, the air inlet pipe 10 is installed above the outer shell 7, and a plurality of The preheating heater 6 is evenly arranged above the conveying mechanism 2. During the use of the utility model, the raw materials of cement are transported to the rotary kiln body 1 through the conveying mechanism 2. During the transportation process, natural gas is introduced from the inlet pipe, and then the natural gas is heated in the first porous medium layer 8. During the heating process, the preheating heater 6 is heated in a non-open flame heat radiation manner, and the heating temperature is uniform. The heating temperature of the preheating heater 6 can be adjusted by the rate of introducing natural gas. During the preheating process, the utility model can effectively reduce the generation of nitrogen oxides and preheat the cement principle, which can effectively shorten the heating time inside the rotary kiln body 1 and improve the efficiency of cement production.

[0024] like Figure 1 As shown, in this embodiment, a heating mechanism 12 is further provided under the conveying mechanism 2, and a plurality of heating mechanisms 12 are provided. The conveying mechanism 2 is made of high-temperature resistant heat-conductive material, and blocking members are provided on both sides of the conveying mechanism 2. The heating mechanism 12 of the utility model can preheat the conveying mechanism 2, and then preheat the material on the conveyor belt. The utility model can perform double-sided preheating, and the preheating time is shorter, which can increase the feeding rate.

[0025] like Figure 1 As shown, in this embodiment, a second porous medium layer 13 and a second heat storage body 14 are provided inside the heating mechanism 12. The heating mechanism 12 of the utility model also heats by heat radiation. There is no obvious flame during the heating process and the heating is uniform.

[0026] like Figure 1 As shown, in this embodiment, the first heat storage body 9 and the second heat storage body 14 are arranged in a foam shape. The first heat storage body 9 and the second heat storage body 14 are made of ceramic material by slurry firing. The first heat storage body 9 and the second heat storage body 14 of the utility model can prevent the flame from flowing back when natural gas is introduced, and can make the natural gas and air mix, thereby improving the combustion rate of natural gas in the later stage.

[0027] like Figure 1As shown, in this embodiment, the preheating heater 6 and the heating mechanism 12 are both provided with gas distribution plates 15. The gas distribution plates 15 of the utility model are used to disperse the natural gas so that the contact surface between the natural gas and the first porous medium and the second porous medium is larger.

[0028] like Figure 1 As shown, in this embodiment, the inner wall of the outer cover 4 is provided with a thermal insulation layer 16, the thickness of the thermal insulation layer 16 is 5-10 cm, and the thermal insulation layer 16 is made of aluminum oxide. The thermal insulation layer 16 of the utility model can be used to prevent heat from being lost from the outer cover 4.

[0029] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary kiln with a preheater, characterized in that: The invention comprises a rotary kiln body, a conveying mechanism and a preheating component, wherein the preheating component comprises an outer cover, a guide rail and a plurality of preheating heaters, the conveying mechanism is installed on the side of the rotary kiln body, the outer cover is installed above the conveying mechanism, the guide rail is welded to the inner wall of the outer cover, the preheating heater comprises an outer shell, a first porous medium layer, a first heat storage body and an air inlet pipe, the outer shell is provided with a slider used in conjunction with the guide rail, the first heat storage body and the first porous medium layer are sequentially installed inside the outer shell from top to bottom, the air inlet pipe is installed above the outer shell, and a plurality of preheating heaters are evenly arranged above the conveying mechanism.

2. A rotary kiln with a preheater according to claim 1, characterized in that: A heating mechanism is also arranged below the conveying mechanism, and a plurality of heating mechanisms are arranged.

3. A rotary kiln with a preheater according to claim 2, characterized in that: A second porous medium layer and a second heat storage body are arranged inside the heating mechanism.

4. A rotary kiln with a preheater according to claim 3, characterized in that: The first heat storage body and the second heat storage body are arranged in a foam shape, and the first heat storage body and the second heat storage body are made of ceramic material by slurry coating and firing.

5. The rotary kiln with a preheater according to claim 2, characterized in that: The preheating heater and the heating mechanism are both provided with air distribution plates.

6. The rotary kiln with a preheater according to claim 1, characterized in that: The conveying mechanism is made of high temperature resistant heat conductive material, and blocking members are arranged on both sides of the conveying mechanism.

7. The rotary kiln with a preheater according to claim 1, characterized in that: The inner wall of the outer cover is provided with a heat-insulating layer, the thickness of the heat-insulating layer is 5-10 cm, and the heat-insulating layer is made of aluminum oxide.

Images