Blowing discharge pipe
By setting up a variable diameter structure and an air supply pipe in the coal injection pipe, the problems of unstable injection and wear of the coal injection pipe are solved, stable and continuous coal powder transportation is achieved, and the service life and combustion stability of the coal injection pipe are improved.
Patent Information
- Application Number
- CN202422620536.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing coal injection pipelines have problems such as unstable injection, severe wear, short service life, and incomplete combustion, resulting in high maintenance costs and unstable combustion.
The use of a blowing discharge pipe, including a reducer structure and an air supply pipe in the coal injection pipe, through the design of a concentric reducer, air supply pipe and balance pipe, combined with an external air compressor and radial pressure gauge, achieves air flow stability and continuity of coal powder transportation, thereby enhancing the injection accuracy and stability.
The economical practicality and injection stability of the coal injection pipeline are improved, wear is reduced, the continuity and stability of combustion are ensured, and the maintenance cost is reduced.
Smart Images
Figure CN223360626U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal injection, in particular to a coal injection discharge pipe. Background Art
[0002] With the rise of the construction industry, cement and lime have become indispensable products in the industry. Coal-injected combustion plays a key role in raw material processing. Commonly used burners use ordinary coal-injected pipes, which cannot withstand material erosion during operation, increasing maintenance costs and labor. Furthermore, existing burners generally suffer from unstable feed rates and incomplete combustion, which can easily lead to burner flameout and uncontrollable coal powder costs.
[0003] Existing coal injection pipelines mostly use ordinary pipes and screw blowers. Although relatively economical, they have numerous drawbacks, including a short service life, unstable injection, and an inability to achieve continuous injection. During burner operation, the discharge pipe, under normal operating conditions, comes into contact with the pulverized coal being transported, causing friction. This wear and tear on the discharge pipe can affect both flow rate and stability.
[0004] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Utility Model Content
[0005] In view of the above defects, the utility model provides a blowing discharge pipe to solve the problem of unstable blowing in the coal injection pipeline.
[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0007] A material injection pipe comprises a coal injection pipe and a material pipe connected to the coal injection pipe, wherein the coal injection pipe is provided with a variable diameter structure;
[0008] The reducing structure includes a concentric reducing head 1, an air supply pipe, a balance pipe and a concentric reducing head 2.
[0009] The concentric reducer 1 is arranged at the air inlet end of the coal injection pipeline, the air supply pipe is inserted into the coal injection pipeline and is located on the left side of the concentric reducer 1, the balance pipe is installed on the coal injection pipeline, and one end is located on the left side of the concentric reducer 1 and the other end is located on the right side of the concentric reducer 1, and the concentric reducer 2 is located at the air outlet end of the coal injection pipeline.
[0010] Furthermore, the air supply pipe is connected to an external air compressor.
[0011] Furthermore, a radial pressure gauge is installed on the coal injection pipeline.
[0012] Furthermore, the diameter of the air inlet end of the coal injection pipe is larger than the diameter of the air outlet end.
[0013] Furthermore, the air inlet and outlet ends of the coal injection pipeline are respectively installed with connecting flanges, and the upper end of the material pipeline is installed with a special-shaped flange.
[0014] The utility model provides a blowing discharge pipe with the following beneficial effects: a concentric reducer is added to the air inlet end of the coal injection pipe, so as to achieve the goal of injecting pulverized coal with a lower gas volume and lower pressure; at the same time, in order to prevent the change of the diameter of the air inlet end of the coal injection pipe from affecting the stability of the air flow, an air supply pipe and a balance pipe are added at the pipe diameter change, thereby disrupting the gas vortex phenomenon and achieving stable and continuous transportation;
[0015] At the same time, a pressure switch is added to the air supply pipeline to balance the air pressure inside the pipeline and solve the problems of combustion interruption and unstable injection. A second concentric reducer is added to the outlet end of the coal injection pipeline to increase the flow rate of the injected coal powder, thereby improving the economic practicality, injection accuracy and stability of the coal injection pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of a blowing discharge pipe described in the utility model.
[0017] Figure 2 This is a sectional view taken along line A of the present invention.
[0018] Figure 3 This is a schematic diagram of the special-shaped flange described in the present invention.
[0019] In the figure: 1. Coal injection pipeline; 2. Material pipeline; 3. Concentric reducer 1; 4. Air supply pipe; 5. Balance pipe; 6. Concentric reducer 2; 7. Radial pressure gauge; 8. Connecting flange; 9. Special-shaped flange. DETAILED DESCRIPTION
[0020] The present invention will be described in detail below with reference to the accompanying drawings. Figure 1-3 The figure shows: a blowing discharge pipe, comprising a coal injection pipe 1 and a material pipe 2 connected to the coal injection pipe 1, the coal injection pipe 1 is provided with a reducing structure; the reducing structure comprises a concentric reducing head 3, an air supply pipe 4, a balancing pipe 5 and a concentric reducing head 2 6, the concentric reducing head 3 is arranged at the air inlet end of the coal injection pipe 1, the air supply pipe 4 is inserted into the coal injection pipe 1, and is located on the left side of the concentric reducing head 3, the balancing pipe 5 is installed on the coal injection pipe 1, and one end is located on the left side of the concentric reducing head 3, and the other end is located on the right side of the concentric reducing head 3, the concentric reducing head 2 6 is located at the air outlet end of the coal injection pipe 1; the air supply pipe 4 is connected to an external air compressor; a radial pressure gauge 7 is installed on the coal injection pipe 1; the diameter of the air inlet end of the coal injection pipe 1 is larger than the diameter of the air outlet end; the air inlet and air outlet ends of the coal injection pipe 1 are respectively installed with connecting flanges 8, and the upper end of the material pipe 2 is installed with a special-shaped flange 9.
[0021] Working principle of this embodiment: The coal injection pipe 1 is made of a material with high hardness and wear resistance, such as 316L, 40Cr, etc., and different wear-resistant coatings are selected according to different conveying materials. Generally, tungsten carbide is sprayed to improve the wear resistance and service life of the coal injection pipe 1;
[0022] During injection: the concentric reducer 3 is arranged at the air inlet end of the coal injection pipeline 1, the air supply pipe 4 is inserted into the coal injection pipeline 1 and is located on the left side of the concentric reducer 3, the balance pipe 5 is installed on the coal injection pipeline 1, and one end is located on the left side of the concentric reducer 3 and the other end is located on the right side of the concentric reducer 3, the concentric reducer 2 6 is located at the air outlet end of the coal injection pipeline 1, the air supply pipe 4 is connected to the external air pump, and a radial pressure gauge 7 is installed on the coal injection pipeline 1. The diameter of the air inlet end of the coal injection pipeline 1 is larger than the diameter of the air outlet end. Figure 1 and Figure 2 As shown, the left end of the coal injection pipeline 1 is provided with an air inlet end, and the right end is provided with an air outlet end. The material pipeline 2 is used to transport coal powder, and the radial pressure gauge 7 is used to detect the gas pressure at the concentric reducer 3. The concentric reducer 3 is added to the air inlet end of the coal injection pipeline 1 to achieve coal powder injection with lower gas volume and smaller pressure. At the same time, in order to prevent the change of the diameter pipe at the air inlet end of the coal injection pipeline 1 from affecting the stability of the air flow, an air supply pipe 4 and a balance pipe 5 are added at the pipe diameter change, thereby disrupting the gas vortex phenomenon and achieving stable and continuous transportation. At the same time, the air supply pipeline 4 is added to connect the pressure switch to balance the internal air pressure of the pipeline and solve the problems of combustion interruption and unstable injection. The concentric reducer 6 is added to the air outlet end of the coal injection pipeline 1 to increase the flow rate of the injected coal powder, thereby improving the economic practicality, injection accuracy and stability of the coal injection pipeline 1.
[0023] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.
Claims
1. A blowing discharge pipe, comprising a coal injection pipe (1) and a material pipe (2) connected to the coal injection pipe (1), characterized in that: The coal injection pipe (1) is provided with a variable diameter structure; The reducing structure includes a concentric reducing head 1 (3), an air supply pipe (4), a balance pipe (5) and a concentric reducing head 2 (6). The concentric reducer (3) is arranged at the air inlet end of the coal injection pipeline (1), the air supply pipe (4) is inserted into the coal injection pipeline (1) and is located on the left side of the concentric reducer (3), the balance pipe (5) is installed on the coal injection pipeline (1), and one end is located on the left side of the concentric reducer (3) and the other end is located on the right side of the concentric reducer (3), and the concentric reducer (6) is located at the air outlet end of the coal injection pipeline (1).
2. A blowing discharge pipe according to claim 1, characterized in that: The air supply pipe (4) is connected to an external air compressor.
3. A blowing discharge pipe according to claim 1, characterized in that: A radial pressure gauge (7) is installed on the coal injection pipeline (1).
4. A blowing discharge pipe according to claim 1, characterized in that: The diameter of the air inlet end of the coal injection pipe (1) is larger than the diameter of the air outlet end.
5. The blowing discharge pipe according to claim 1, characterized in that: The coal injection pipeline (1) is provided with connecting flanges (8) at the air inlet and outlet ends, respectively, and a special-shaped flange (9) is provided at the upper end of the material pipeline (2).