Pulverized coal preheating device
By adopting a air tray and a conical uniform splitting head structure in the coal powder preheating device, the problem of uneven blowing of the heat source to the uniform splitting pipe is solved, uniform preheating and efficient heat transfer of the coal powder are achieved, and the preheating efficiency is improved.
Patent Information
- Application Number
- CN202422350176.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing coal powder preheating device cannot blow the external heat source evenly to the uniform pipe, resulting in uneven heating of the outer circumference of the uniform pipe, slow heat transfer speed, and uneven heating of the coal powder, affecting the preheating efficiency.
A coal powder preheating device is designed, adopting a cloth air tray and a conical uniform splitting head structure. The high-temperature flue gas is uniformly blown to the outer circumference of the uniform splitting pipe through the cloth air tray, and the thermal energy conduction efficiency is improved through the copper material uniform splitting pipe to ensure uniform preheating of the coal powder.
A uniform preheating of coal powder is achieved, the preheating efficiency is improved, and the uniform heating and rapid heat transfer of coal powder is ensured.
Smart Images
Figure CN223061000U_ABST
Abstract
Description
Technical Field:
[0001] The utility model belongs to the field of pulverized coal preheating production, and particularly relates to a pulverized coal preheating device. Background Art:
[0002] The blast furnace injection technology is to directly inject the pulverized coal into the blast furnace to replace the metallurgical coke with poor resources and high price, acting as a heating agent and a reducing agent, so as to reduce the coke ratio and the cost of pig iron. It is one of the most effective measures for iron and steel enterprises to save coke, increase production and improve the smelting process.
[0003] When the existing pulverized coal preheating device preheats pulverized coal, the introduced external heat source (such as high-temperature flue gas) cannot be evenly blown onto several equalizing pipes in the pulverized coal preheating device. As a result, the outer circumferential surface of the equalizing pipe is unevenly heated, the heat transfer speed is slow and uneven, and finally the pulverized coal flowing in the inner cavity of the equalizing pipe is unevenly preheated, affecting the preheating efficiency of the pulverized coal. Content of the Utility Model:
[0004] The purpose of the utility model is to provide a pulverized coal preheating device, which overcomes the above-mentioned deficiencies of the prior art and effectively solves the existing problem of low pulverized coal preheating efficiency.
[0005] The content of the utility model: A pulverized coal preheating device includes a distribution pipe. A pulverized coal pipe is communicated with the input end of the distribution pipe. An air distribution plate is coaxially installed in the inner cavity of the distribution pipe. A plurality of jacks are evenly and penetratingly arranged on the air distribution plate. Equalizing pipes are inserted into the jacks. The output end of the equalizing pipe extends outside the distribution pipe. A plurality of air holes are evenly arranged on the inner end cross-section of the air distribution plate. An air inlet pipe is communicated with the circumferential surface of the air distribution plate. The outer end of the air inlet pipe extends outside the distribution pipe. An exhaust pipe is communicated with the outer end side wall of the distribution pipe.
[0006] Further, a conical equalizing head is coaxially installed in the inner cavity of the distribution pipe. A channel matching the equalizing pipe is arranged on the conical equalizing head, and the channel is communicated with the equalizing pipe.
[0007] Further, the input end of the distribution pipe is conical.
[0008] Further, a plurality of the air inlet pipes are evenly communicated with the circumferential surface of the air distribution plate.
[0009] Further, the equalizing pipe is made of copper.
[0010] Further, a flange is arranged at the input end of the pulverized coal pipe.
[0011] Advantages of the present utility model: Through the air distribution plate, the high-temperature flue gas of the heat source can be evenly blown onto the outer circumferential surfaces of a number of equalizing pipes, enabling the equalizing pipes to be heated more evenly, and quickly and evenly conducting the heat energy to the pulverized coal, so that the pulverized coal is evenly preheated, thereby improving the preheating efficiency of the pulverized coal. Brief description of the drawings:
[0012] Figure 1 It is a partial sectional view of the front view of the present utility model;
[0013] Figure 2 is Figure 1 the sectional view of part A-A in
[0014] In the figure: 1 distribution pipe, 2 pulverized coal pipe, 3 air distribution plate, 4 jack, 5 equalizing pipe, 6 air hole, 7 inlet pipe, 8 exhaust pipe, 9 conical equalizing head, 10 channel. Specific implementation manner:
[0015] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific implementation manner of the present utility model is now described with reference to the accompanying drawings:
[0016] As Figures 1 to 2 shown, a pulverized coal preheating device includes a distribution pipe 1. A pulverized coal pipe 2 is connected to the input end of the distribution pipe 1. An air distribution plate 3 is coaxially installed in the inner cavity of the distribution pipe 1. A number of jacks 4 are evenly and penetratingly formed on the air distribution plate 3. An equalizing pipe 5 is inserted into the jack 4. The output end of the equalizing pipe 5 extends outside the distribution pipe 1. A number of air holes 6 are evenly formed on the inner end cross-section of the air distribution plate 3. An inlet pipe 7 is connected to the circumferential surface of the air distribution plate 3. The outer end of the inlet pipe 7 extends outside the distribution pipe 1. An exhaust pipe 8 is connected to the outer side wall of the distribution pipe 1.
[0017] Specifically, through the air distribution plate 3, the high-temperature flue gas of the heat source can be evenly blown onto the outer circumferential surfaces of a number of equalizing pipes 5, enabling the equalizing pipes 5 to be heated evenly and the pulverized coal to be evenly preheated.
[0018] During actual use, the pulverized coal is sprayed into the pulverized coal pipe 2 at high speed. The pulverized coal pipe 2 introduces the pulverized coal into the inner cavity of the distribution pipe 1. At this time, the pulverized coal evenly enters the inner cavities of a number of equalizing pipes 5. The external high-temperature flue gas enters the inner cavity of the air distribution plate 3 through the inlet pipe 7. At this time, the evenly formed number of air holes 6 evenly blow the high-temperature flue gas into the heating chamber formed between the air distribution plate 3 and the distribution pipe 1, enabling the outer circumferential surfaces of the equalizing pipes 5 in the heating chamber to be heated more evenly. The evenly heated equalizing pipes 5 conduct the heat to the pulverized coal flowing in the pipes, enabling the pulverized coal to be evenly preheated; when the heat exchange of the high-temperature flue gas in the heating chamber is completed, it is discharged from the exhaust pipe 8.
[0019] As Figures 1 to 2 shown, a pulverized coal preheating device, in the inner cavity of the distribution pipe 1, a conical equalizing head 9 is coaxially installed. A channel 10 matching the equalizing pipe 5 is opened on the conical equalizing head 9. The channel 10 is communicated with the equalizing pipe 5. The input end of the distribution pipe 1 is conical. A plurality of the intake pipes 7 are uniformly communicated on the circumferential surface of the air distribution plate 3. The equalizing pipe 5 is made of copper material, and a flange is provided at the input end of the pulverized coal pipe 2.
[0020] Specifically, the conical equalizing head 9 can distribute the pulverized coal more evenly into the equalizing pipe 5.
[0021] During the actual use process, the conical equalizing head 9 further evenly scatters the pulverized coal that enters the distribution pipe 1 at high speed to the surroundings, so that the pulverized coal can evenly enter the channel 10. At this time, the channel 10 conveys the pulverized coal to the corresponding equalizing pipe 5. A plurality of the intake pipes 7 uniformly communicated on the circumferential surface of the air distribution plate 3 make the high-temperature flue gas volume entering the air distribution plate 3 more sufficient and uniform, further improving the preheating effect of the pulverized coal. The equalizing pipe 5 made of copper material has better heat conduction efficiency.
[0022] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A pulverized coal preheating device, comprising a distribution pipe (1), and a pulverized coal pipe (2) is communicated at the input end of the distribution pipe (1), characterized in that: A air distribution plate (3) is coaxially installed in the inner cavity of the distribution pipe (1). A number of jacks (4) are evenly and penetratingly formed on the air distribution plate (3). A uniform distribution pipe (5) is inserted into the jack (4). The output end of the uniform distribution pipe (5) extends outside the distribution pipe (1). A number of air holes (6) are evenly formed on the inner end cross-section of the air distribution plate (3). An air inlet pipe (7) is communicated with the circumferential surface of the air distribution plate (3). The outer end of the air inlet pipe (7) extends outside the distribution pipe (1). An exhaust pipe (8) is communicated with the outer end side wall of the distribution pipe (1).
2. The pulverized coal preheating device according to claim 1, characterized in that: A conical uniform head (9) is coaxially installed in the inner cavity of the distribution pipe (1). A channel (10) matching with the uniform distribution pipe (5) is formed on the conical uniform head (9). The channel (10) is communicated with the uniform distribution pipe (5).
3. The pulverized coal preheating device according to claim 2, wherein: The input end of the distribution pipe (1) is conical in shape.
4. A pulverized coal preheating device according to claim 1, characterized in that: A number of the air inlet pipes (7) are evenly communicated with the circumferential surface of the air distribution plate (3).
5. A pulverized coal preheating device according to claim 1, characterized in that: The uniform distribution pipe (5) is made of copper.
6. A pulverized coal preheating device according to claim 1, characterized in that: A flange is arranged at the input end of the pulverized coal pipe (2).