Raw coal drying furnace

Abstract

The utility model discloses a raw coal drying furnace. The raw coal drying furnace comprises a furnace body used for containing raw coal, a plurality of dispersing pipes used for dispersing hot air into different height positions in the furnace body and a plurality of exhaust pipes used for exhausting the hot air out of the furnace body, the dispersing pipes are evenly arranged in the furnace body, the exhaust pipes are evenly distributed in the furnace body, and the dispersing pipes are arranged in the furnace body. The dispersing pipes and the exhaust pipes are arranged alternately, and a plurality of air outlets are formed in the dispersing pipes and arranged in the height direction of the furnace body. The raw coal drying furnace is high in drying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of raw coal drying technology, and in particular to a raw coal drying furnace. Background Technology

[0002] Open-pit coal mines are directly exposed to the natural environment, and precipitation (such as rain and snow) falls directly on the surface coal. This precipitation enters the coal seam through surface runoff and infiltration, increasing the moisture content of the surface coal. This results in surface coal being high-moisture, low-calorific-value, and uneconomical low-rank coal, which is unsellable for mining companies. However, only after processing the surface coal can the high-quality coal below be mined. Current technology typically uses drying furnaces to dry high-moisture coal. However, existing drying furnaces use a single air inlet, with hot air flowing from one end to the other. This results in high initial air temperature upon entering the furnace, but a subsequent drop in temperature. While this method achieves drying, it is slow and inefficient. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a raw coal drying oven in which the coal can always be exposed to high-temperature hot air during the drying process.

[0004] To solve the above problems, this utility model provides a raw coal drying furnace, which includes a furnace body for containing raw coal, a dispersion pipe for dispersing hot air to different height positions within the furnace body, and an exhaust pipe for discharging hot air from the furnace body. There are multiple dispersion pipes, which are evenly arranged within the furnace body. There are also multiple exhaust pipes, which are evenly distributed within the furnace body. The dispersion pipes and exhaust pipes are arranged alternately. Multiple air outlets are provided on the dispersion pipes, which are arranged along the height direction of the furnace body.

[0005] Furthermore, the dispersion pipe includes a first pipe body for dispersing hot air and an air outlet baffle for shielding raw coal. The air outlet is located on the first pipe body and is distributed on both sides of the first pipe body, with the air outlets on each side arranged in a row. The upper end of the air outlet baffle is fixed to the first pipe body, and the lower end of the air outlet baffle is away from the first pipe body. The air outlet baffles on each side are distributed along the height direction of the furnace body. The upper end of the air outlet baffle is higher than the position of the corresponding air outlet, and the lower end of the air outlet baffle is lower than the position of the corresponding air outlet.

[0006] Furthermore, it also includes an air duct for introducing hot air from outside the furnace body into the dispersion tube, the air duct being connected to the first tube body.

[0007] Furthermore, the furnace body is provided with a connecting port, the exhaust pipe has a connecting port, and the first pipe body is provided with an air inlet. The connecting port, the connecting port, and the air inlet are aligned, and hot air enters the first pipe body from the connecting port of the exhaust pipe through the connecting port and the air inlet of the first pipe body.

[0008] Furthermore, the exhaust pipe includes a main connecting pipe for connecting to an external hot air source and a secondary connecting pipe for sending hot air from the main connecting pipe into the distribution pipe, the secondary connecting pipe being installed on the main connecting pipe.

[0009] Furthermore, there are multiple secondary connecting pipes, which are evenly spaced along the height of the furnace body on the main connecting pipe.

[0010] Furthermore, secondary connecting pipes are provided on both sides of the main connecting pipe.

[0011] Furthermore, the exhaust pipe includes a second pipe body, an outlet pipe body, and a suction baffle. The second pipe body is provided with suction ports for absorbing hot air. There are multiple suction ports, which are distributed on both sides of the second pipe body, arranged in a row on each side. The second pipe body is used to collect the absorbed hot air. The upper end of the suction baffle is fixed to the second pipe body, and the lower end of the suction baffle is away from the second pipe body. The suction baffles on each side are distributed along the height direction of the furnace body. The upper end of the suction baffle is higher than the position of the corresponding suction port, and the lower end of the suction baffle is lower than the position of the corresponding suction port. The top of the second pipe body is installed on the outlet pipe body. The exhaust pipe is provided with an exhaust port, and both ends of the exhaust pipe extend out of the furnace body.

[0012] Furthermore, the top of the furnace body is provided with a feed inlet for raw coal to enter the furnace body.

[0013] Furthermore, there are multiple feed inlets, which are evenly distributed on the top of the furnace body.

[0014] This utility model has multiple dispersion tubes evenly distributed inside the raw coal drying furnace. Each dispersion tube has an air outlet evenly distributed along the height of the furnace body, so that the hot air can be evenly distributed inside the furnace body. The raw coal at any position comes into contact with the uniform high-temperature hot air, thus improving the drying efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the raw coal drying furnace of this utility model.

[0016] Figure 2 This is a horizontal sectional view of the raw coal drying furnace of this utility model.

[0017] Figure 3 This is a schematic diagram of the air duct structure.

[0018] Figure 4 This is a schematic diagram showing the alignment of the air inlet, connecting port, and connection port.

[0019] Figure 5 This is a schematic diagram of the dispersion tube.

[0020] Figure 6 This is a schematic diagram of the exhaust duct structure.

[0021] The meanings of the labels in the attached diagram are as follows:

[0022] Furnace body 1, feed inlet 11, connecting port 12, exhaust pipe 2, main connecting pipe 21, auxiliary connecting pipe 22, connecting port 221, dispersing pipe 3, first pipe body 31, air outlet 311, air inlet 312, air outlet baffle 32, exhaust pipe 4, second pipe body 41, air intake 411, air outlet pipe body 42, exhaust port 421, air intake baffle 43. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1 and Figure 2 As shown, a preferred embodiment of the raw coal drying furnace of this utility model includes a furnace body 1, an induced draft pipe 2, a dispersion pipe 3, and an exhaust pipe 4. The furnace body 1 is used to contain raw coal. The induced draft pipe 2 is used to introduce hot air into the dispersion pipe 3, and the dispersion pipe 3 is used to disperse the hot air to different height positions within the furnace body 1 to dry the raw coal within the furnace body 1. The exhaust pipe 4 is used to discharge the hot air from the furnace body 1. There are multiple dispersion pipes 3 and exhaust pipes 4, which are evenly distributed within the furnace body 1 and alternately arranged to ensure that the hot air can be evenly distributed within the furnace body 1, while effectively discharging the hot air from the furnace body 1 through the exhaust pipes 4. A single dispersion tube 3 can evenly disperse hot air to different heights within the furnace body 1. At the same time, multiple dispersion tubes 3 are evenly distributed within the furnace body 1, allowing hot air to be evenly dispersed at different positions on the horizontal plane within the furnace body 1. This ensures that the hot air is evenly distributed within the furnace body 1, and all raw coal within the furnace body 1 can come into contact with the high-temperature hot air, thereby improving drying efficiency.

[0025] The top of the furnace body 1 is provided with multiple feed inlets 11, which are evenly distributed on the top of the furnace body 1 to ensure that the raw coal is evenly distributed within the furnace body 1. The furnace body 1 is provided with a connecting port 12 to facilitate the connection between the induced draft pipe 2 and the dispersion pipe 3.

[0026] like Figure 3 and Figure 4As shown, the exhaust duct 2 includes a main connecting pipe 21 and auxiliary connecting pipes 22. The main connecting pipe 21 is used to connect to an external hot air source. The auxiliary connecting pipe 22 is installed on the main connecting pipe 21 and is also connected to the dispersion pipe 3. The auxiliary connecting pipe 22 is used to send hot air from the main connecting pipe 21 into the dispersion pipe 3. There are multiple auxiliary connecting pipes 22, and auxiliary connecting pipes 22 are symmetrically arranged on both sides of the main connecting pipe 21, so that both ends of the dispersion pipe 3 are connected to the auxiliary connecting pipes 22, ensuring that air can enter from both ends of the exhaust duct, which can increase the air intake of the dispersion pipe 3 and thus improve the drying efficiency. Each dispersion pipe 3 is connected to three auxiliary connecting pipes 22 at one end, so that the dispersion pipe 3 has air intake at the top, middle and bottom, reducing the temperature difference in the dispersion pipe 3, improving the drying quality, and effectively avoiding the phenomenon of partial drying and partial undrying. The secondary connecting pipe 22 and the dispersing pipe 3 can be directly connected or indirectly connected. In this embodiment, an indirect connection is used. Specifically, multiple connection ports 221 are provided on the secondary connecting pipe 22. The number of connection ports 221 depends on the number of dispersing pipes 3. The connection ports 221 are distributed along the length of the secondary connecting pipe 22. The furnace body 1 is provided with a connecting port 12 corresponding to the connection port 221. Each dispersing pipe 3 is provided with six air inlets 312. Three air inlets 312 are located at one end of the dispersing pipe 3, and the other three air inlets 312 are located at the other end of the dispersing pipe 3. Each air inlet 312 is aligned with the connecting port 12, and the connecting port 12 is aligned with the connection port 221, thereby connecting the secondary connecting pipe 22 and the dispersing pipe 3, allowing hot air to be sent from the secondary connecting pipe 22 into the dispersing pipe 3. In other embodiments, the number of secondary connecting pipes 22 can be more or less, usually set according to the height of the dispersing pipe 3; of course, the secondary connecting pipes 22 can also be provided only on one side of the main connecting pipe.

[0027] like Figure 5As shown, the dispersion pipe 3 includes a first pipe body 31 and an air outlet baffle 32. The first pipe body 31 is provided with an air outlet 311 for exhausting hot air. There are multiple air outlets 311, which are distributed on both sides of the first pipe body 31, and the air outlets 311 on each side are arranged in a row. The air outlet baffles 32 are obliquely fixed on both sides of the first pipe body 31. The upper end of the air outlet baffles 32 is fixed to the first pipe body 31, and the lower end of the air outlet baffles 32 is away from the first pipe body 31. The air outlet baffles 32 on each side are distributed along the height direction of the furnace body 1. The upper end of the air outlet baffles 32 is higher than the position of the corresponding air outlet 311, and the lower end of the air outlet baffles 32 is lower than the position of the corresponding air outlet 311. This achieves the purpose of the air outlet baffles 32 blocking the raw coal, that is, the air outlet baffles 32 are used to block the air outlets 311, which can prevent the raw coal from blocking the air outlets 311 and ensure that the air outlets 311 are unobstructed and will not be blocked. The air inlets 312 are located at both ends of the first pipe body 31. The upper and lower ends of the first pipe body 31 are closed, ensuring that hot air can only enter from the air inlets 312 and exit from the air outlets 311, so that the hot air can be evenly distributed at different heights of the furnace body 1, thereby improving the drying efficiency.

[0028] like Figure 6 As shown, the exhaust pipe 4 includes a second pipe body 41, an air outlet pipe body 42, and an air suction baffle 43. The second pipe body 41 is provided with air suction ports 411 for absorbing hot air. There are multiple air suction ports 411, which are distributed on both sides of the second pipe body 41. The air suction ports 411 on each side are arranged in a row. The second pipe body 41 is used to collect the inhaled hot air. The suction baffle 43 is obliquely fixed on both sides of the second pipe body 41. The upper end of the suction baffle 43 is fixed on the second pipe body 41, and the lower end of the suction baffle 43 is away from the second pipe body 41. The suction baffles 43 on each side are distributed along the height direction of the furnace body 1. The upper end of the suction baffle 43 is higher than the position of the corresponding air inlet 411, and the lower end of the suction baffle 43 is lower than the position of the corresponding air inlet 411. This achieves the purpose of the suction baffle 43 blocking the raw coal. That is, the suction baffle 43 is used to block the air inlet 411, which can prevent the raw coal from blocking the air inlet 411 and ensure that the air inlet 411 is unobstructed and will not be blocked. The top of the second pipe body 41 is installed on the air outlet pipe body 42. An air outlet 421 is provided on the air outlet pipe 4, and both ends of the air outlet pipe 4 extend out of the furnace body 1. Both ends of the air outlet pipe 4 are provided with air outlets 421 to increase the exhaust volume. The lower end of the second pipe body 41 is closed, ensuring that hot air can only enter from the air intake 411 and exit from the air outlet 421 of the air outlet pipe. The air intake 411 are evenly distributed inside the furnace body 1, enabling the rapid discharge of hot air that has dried the raw coal.

[0029] In use, raw coal enters the furnace body 1 through the feed inlet 11, and hot air enters the auxiliary connecting pipe 22 through the main connecting pipe 21. Then, hot air enters the dispersion pipe 3 through the auxiliary connecting pipe 22 and enters the furnace body 1 through the air outlet 311 of the dispersion pipe 3. Since there are multiple dispersion pipes 3 evenly distributed in the furnace body 1, and each dispersion pipe 3 has multiple air outlets 311 distributed in the height direction of the furnace body 1, the hot air can enter the furnace body 1 evenly, so that the raw coal comes into contact with high-temperature hot air, rather than hot air after heat exchange, which improves the drying efficiency. At the same time, it can evenly dry the raw coal in the furnace body 1, which improves the drying quality.

[0030] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A raw coal drying furnace, characterized in that: The furnace includes a furnace body for containing raw coal, a dispersion pipe for dispersing hot air to different height positions within the furnace body, and an exhaust pipe for discharging hot air from the furnace body. There are multiple dispersion pipes evenly distributed within the furnace body, and multiple exhaust pipes evenly distributed within the furnace body. The dispersion pipes and exhaust pipes are arranged alternately, and the dispersion pipes are provided with multiple air outlets, which are arranged along the height direction of the furnace body.

2. The raw coal drying furnace as described in claim 1, characterized in that: The dispersion pipe includes a first pipe body for dispersing hot air and an air outlet baffle for shielding raw coal. The air outlet is located on the first pipe body and is distributed on both sides of the first pipe body, with the air outlets on each side arranged in a row. The upper end of the air outlet baffle is fixed to the first pipe body, and the lower end of the air outlet baffle is away from the first pipe body. The air outlet baffles on each side are distributed along the height direction of the furnace body. The upper end of the air outlet baffle is higher than the position of the corresponding air outlet, and the lower end of the air outlet baffle is lower than the position of the corresponding air outlet.

3. The raw coal drying furnace as described in claim 2, characterized in that: It also includes an air duct for introducing hot air from outside the furnace body into the dispersion tube, the air duct being connected to the first tube body.

4. The raw coal drying furnace as described in claim 3, characterized in that: The furnace body is provided with a connecting port, the exhaust pipe has a connecting port, and the first pipe body is provided with an air inlet. The connecting port, the connecting port and the air inlet are aligned, and hot air enters the first pipe body from the connecting port of the exhaust pipe through the connecting port and the air inlet of the first pipe body.

5. The raw coal drying furnace as described in claim 3, characterized in that: The air duct includes a main connecting pipe for connecting to an external hot air source and a secondary connecting pipe for sending hot air from the main connecting pipe into a distribution pipe, the secondary connecting pipe being installed on the main connecting pipe.

6. The raw coal drying furnace as described in claim 5, characterized in that: There are multiple auxiliary connecting pipes, which are evenly spaced along the height of the furnace body on the main connecting pipe.

7. The raw coal drying furnace as described in claim 6, characterized in that: Auxiliary connecting pipes are provided on both sides of the main connecting pipe.

8. The raw coal drying furnace as described in claim 1, characterized in that: The exhaust duct includes a second duct body, an outlet duct body, and a suction baffle. The second duct body is provided with multiple suction ports for absorbing hot air, which are distributed on both sides of the second duct body and arranged in a row on each side. The second duct body is used to collect the absorbed hot air. The upper end of the suction baffle is fixed to the second duct body, and the lower end of the suction baffle is away from the second duct body. The suction baffles on each side are distributed along the height direction of the furnace body. The upper end of the suction baffle is higher than the position of the corresponding suction port, and the lower end of the suction baffle is lower than the position of the corresponding suction port. The top of the second duct body is installed on the outlet duct body. The exhaust duct is provided with an exhaust port, and both ends of the exhaust duct extend out of the furnace body.

9. The raw coal drying furnace as described in claim 1, characterized in that: The top of the furnace body is provided with a feed inlet for raw coal to enter the furnace body.

10. The raw coal drying furnace as described in claim 9, characterized in that: There are multiple feed inlets, which are evenly distributed on the top of the furnace body.

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