Gas mixing mechanism for combustion of rotary kiln

Abstract

The utility model provides a gas mixing mechanism for rotary kiln combustion, and relates to the field of rotary kilns, the gas mixing mechanism for rotary kiln combustion comprises a gas inlet pipeline, an oxygen inlet pipeline and an annular pipeline, the gas inlet pipeline and the oxygen inlet pipeline are both in through connection with a rotary kiln, and the annular pipeline is communicated with the rotary kiln. The annular pipeline is installed in the rotary kiln, a plurality of air nozzles are arranged on the annular pipeline, and the air nozzles are all arranged in the direction of the central axis of the rotary kiln; natural gas can be introduced into the annular pipeline through the fuel gas inlet pipeline, oxygen or air can be introduced into the annular pipeline through the oxygen inlet pipeline, the natural gas and the oxygen are fully mixed, the natural gas and the air are fully mixed, and then the mixed gas is sprayed into the rotary kiln through the gas nozzle to be fully combusted. And the fuel gas is fully combusted.

Description

Technical Field

[0001] This application relates to the field of rotary kilns, and more specifically, to a gas mixing mechanism for combustion in a rotary kiln. Background Technology

[0002] In China, raw meal grinding and clinker calcination are two core processes in traditional cement production, significantly impacting product quality and energy consumption. With the development of the cement industry, improving combustion efficiency and thermal energy utilization has become a focus. Oxygen-enriched combustion technology can effectively shorten coal combustion time, improve combustion efficiency and temperature, thus meeting the requirements for high-strength clinker calcination. By optimizing the combustion process, oxygen-enriched combustion technology reduces emissions of harmful substances such as nitrogen oxides (NOx), helping cement companies achieve green production. Thoroughly mixing fuel gas and oxygen is currently a goal pursued by the cement industry; however, current rotary kilns simply introduce fuel gas and oxygen without achieving uniform mixing, thus requiring improvement. Summary of the Invention

[0003] The purpose of this application is to provide a gas mixing mechanism for rotary kiln combustion that can solve the above-mentioned technical problems.

[0004] This application provides a gas mixing mechanism for combustion in a rotary kiln, including a gas inlet pipe, an oxygen inlet pipe, and an annular pipe. The gas inlet pipe and the oxygen inlet pipe are both connected to the rotary kiln. The annular pipe is installed inside the rotary kiln and is provided with multiple air nozzles, all of which are oriented towards the central axis of the rotary kiln.

[0005] Preferably, the annular pipe is provided with multiple rotatable air distribution plates inside.

[0006] Preferably, multiple annular pipes are provided, and the multiple annular pipes are evenly installed inside the rotary kiln.

[0007] Preferably, the distance between two adjacent jet nozzles is 5-10 cm.

[0008] Preferably, the distance between two adjacent annular pipes is 10-20cm.

[0009] Preferably, the air distribution plate is provided with a plurality of air outlets, which are arranged in a matrix.

[0010] Preferably, both the gas intake pipe and the oxygen intake pipe are equipped with solenoid valves.

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

[0012] This invention provides a gas mixing mechanism for combustion in a rotary kiln, comprising a gas inlet pipe, an oxygen inlet pipe, and an annular pipe. The gas inlet pipe and the oxygen inlet pipe are both connected to the rotary kiln. The annular pipe is installed inside the rotary kiln and has multiple nozzles, all oriented towards the central axis of the rotary kiln. This invention allows natural gas to be introduced into the annular pipe through the gas inlet pipe, and oxygen or air to be introduced into the annular pipe through the oxygen inlet pipe, ensuring thorough mixing of natural gas and oxygen, and natural gas and air. The mixed gas is then injected into the rotary kiln through the nozzles for complete combustion, ensuring complete combustion of the gas. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the present invention.

[0016] The reference numerals in the attached figures are as follows:

[0017] 1. Gas inlet pipe; 2. Oxygen inlet pipe; 3. Circular pipe; 4. Rotary kiln; 5. Jet nozzle; 6. Gas distribution plate; 7. Solenoid valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] like Figure 1-2 As shown, a gas mixing mechanism for combustion in a rotary kiln 4 includes a gas inlet pipe 1, an oxygen inlet pipe 2, and an annular pipe 3. The gas inlet pipe 1 and the oxygen inlet pipe 2 are both connected to the rotary kiln 4. The annular pipe 3 is installed inside the rotary kiln 4. Multiple nozzles 5 are provided on the annular pipe, and the nozzles 5 are all oriented towards the central axis of the rotary kiln 4. In this invention, natural gas can be introduced into the annular pipe 3 through the gas inlet pipe 1, and oxygen or air can be introduced into the annular pipe 3 through the oxygen inlet pipe 2, so that the natural gas and oxygen, or natural gas and air, are fully mixed. Then, the mixed gas is injected into the rotary kiln 4 through the nozzles 5 for complete combustion, ensuring complete combustion of the gas.

[0025] like Figure 1-2As shown in this embodiment, the annular pipe 3 is provided with a plurality of rotatable gas distribution plates 6, and the gas distribution plates 6 are provided with a plurality of gas outlet holes, which are arranged in a matrix. The gas distribution plates 6 of this utility model can further and fully mix natural gas with oxygen and natural gas with air.

[0026] like Figure 1-2 As shown in this embodiment, in order to improve combustion efficiency, multiple annular pipes 3 are provided, and multiple annular pipes 3 are evenly installed in the rotary kiln 4. The distance between two adjacent jet nozzles 5 is 5-10cm, and the distance between two adjacent annular pipes 3 is 10-20cm.

[0027] Specifically, the appropriate spacing between the jet nozzle 5 and the annular pipe 3 can be selected according to the requirements.

[0028] like Figure 1-2 As shown in this embodiment, both the gas inlet pipe 1 and the oxygen inlet pipe 2 are equipped with solenoid valves 7, which can control the rate of air intake, so that the rotary kiln 4 is always in an oxygen-rich state.

[0029] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas mixing mechanism for combustion in a rotary kiln, characterized in that: It includes a gas inlet pipe, an oxygen inlet pipe, and an annular pipe. The gas inlet pipe and the oxygen inlet pipe are both connected to the rotary kiln. The annular pipe is installed inside the rotary kiln and is equipped with multiple air nozzles, all of which are oriented towards the central axis of the rotary kiln.

2. The gas mixing mechanism for rotary kiln combustion according to claim 1, characterized in that: The annular pipe is equipped with multiple rotatable air distribution plates.

3. The gas mixing mechanism for rotary kiln combustion according to claim 1, characterized in that: Multiple annular pipes are provided, and the multiple annular pipes are evenly installed inside the rotary kiln.

4. A gas mixing mechanism for rotary kiln combustion according to claim 1, characterized in that: The distance between two adjacent jet nozzles is 5-10 cm.

5. A gas mixing mechanism for rotary kiln combustion according to claim 3, characterized in that: The distance between two adjacent annular pipes is 10-20cm.

6. A gas mixing mechanism for rotary kiln combustion according to claim 2, characterized in that: The air distribution plate is provided with multiple air outlets, which are arranged in a matrix.

7. A gas mixing mechanism for rotary kiln combustion according to claim 1, characterized in that: Both the gas intake pipe and the oxygen intake pipe are equipped with solenoid valves.

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