A continuous drying device for lignite

Abstract

The invention discloses a lignite continuous drying device, which relates to the technical field of lignite drying. The lignite after drying burns more completely, improves combustion efficiency, and reduces pollutant emissions. However, during the lignite drying process, due to its flammable characteristics, there is a risk of fire and explosion. However, the existing lignite drying device has a large drying system. Once the dried lignite burns, due to the integrity and close contact of the material, a chain reaction is easily triggered, and the fire spreads rapidly, causing serious safety accidents and huge economic losses. The invention stores the lignite in each independent integrated bin respectively. Once abnormal temperature or internal flames occur during the drying process, even if the lignite in a certain integrated bin burns, it can effectively prevent the fire from spreading to other lignites, thereby preventing the occurrence of chain reactions and providing reliable safety guarantees for the lignite drying process.

Description

Technical Field

[0001] The invention relates to the technical field of lignite drying, in particular to a lignite continuous drying device. Background Art

[0002] Lignite is a type of coal with a low degree of coalification and is brown or dark brown in appearance. Drying lignite can reduce the moisture content in lignite, thereby increasing its calorific value per unit mass, allowing it to release more energy during combustion or other utilization processes, while reducing transportation weight and reducing transportation costs.

[0003] In this regard, the patent document with publication number CN206281277U discloses a lignite drying device, which includes: a screening and crushing device for crushing and screening lignite raw coal; an airflow crushing dryer, wherein a feeding device is provided between the inlet of the airflow crushing dryer and the outlet of the screening and crushing device; a gas-solid separation device, wherein the gas-solid separation device is connected to the outlet of the airflow crushing dryer to receive the mixed gas discharged from the airflow crushing dryer and separate the mixed gas to obtain pulverized coal and dust-containing gas; and a collecting device, wherein the collecting device is connected to the gas-solid separation device to receive the pulverized coal. The lignite drying device effectively reduces the water content in the pulverized coal and has a good drying effect. Compared with the related art in which the lignite is crushed and dried and then dried repeatedly, it is beneficial to reduce the energy consumption of the lignite drying device and improve the energy-saving effect.

[0004] Based on the above-mentioned patent documents and current technology, lignite burns more completely after drying, improves combustion efficiency and reduces pollutant emissions. However, during the lignite drying process, due to its flammable nature, there is a risk of fire and explosion. However, the existing lignite drying device has a large drying system. Once the dried lignite burns, due to the integrity and close contact of the material, it is very easy to cause a chain reaction, and the fire spreads rapidly, causing serious safety accidents and huge economic losses.

[0005] In view of the above problems, a lignite continuous drying device is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a lignite continuous drying device, which solves the problem of great potential safety hazards in lignite drying in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lignite continuous drying device, comprising an isolation bin, an isolation assembly is arranged inside the isolation bin, the isolation assembly comprises a support roller, the support roller and the isolation bin are movably connected, one end of the support roller is connected to a support frame, a conveying assembly is installed inside the support frame, a through slot is provided on the conveying assembly, an integrated bin is embedded inside the through slot, the integrated bin and the through slot are slidably connected, a drying port is provided on one side of the integrated bin, an isolation net is arranged inside the integrated bin, a guide block is also arranged inside the integrated bin, a discharge port is installed at the top of the integrated bin, a corrugated sheet is embedded inside the discharge port;

[0008] A drying component is arranged inside the support frame, and the drying component includes a blower, and a blast pipe is installed on the blower, and the end of the blast pipe is connected to a blast bin, and a blast port is opened on the side of the blast bin, and the blast port corresponds to the drying port;

[0009] A lifting assembly is installed on the inner wall of the support frame, and the lifting assembly includes a support seat, a lifting rod is connected to the support seat, a driving motor is installed on the upper surface of the support seat, an eccentric top block is connected to the output end of the driving motor, and the end of the lifting rod away from the support seat is connected to a support platform, the lifting rod is embedded in a slide groove opened at the bottom end of the support platform, and a return spring is embedded in the slide groove.

[0010] Preferably, one end of the support roller is connected to the support frame, and the other end of the support roller passes through the interior of the isolation chamber, extends to the outside of the isolation chamber and is connected to a stepper motor, and the stepper motor controls the support roller to perform a thirty-degree reciprocating motion.

[0011] Preferably, the conveying assembly includes a transmission roller, a transmission motor and a transmission belt. The transmission motor drives the transmission roller to rotate, and the transmission roller drives the transmission belt to rotate. A groove is provided on the transmission belt, and the integrated bin and the groove on the transmission belt are slidably connected.

[0012] Preferably, the isolation net is fixed to the top of the inner wall of the integrated bin, and a passage for the lignite to pass through is left between the bottom end of the isolation net and the integrated bin.

[0013] Preferably, the inner side surface of the guide block is arc-shaped, and the guide block is arranged directly below the discharge port. The hot air is blown into the interior of the integrated bin through the isolation net, guided by the guide block and discharged through the discharge port.

[0014] Preferably, the corrugated sheet is made of elastic material, the top end of the corrugated sheet is connected to the discharge port, and the bottom end of the corrugated sheet is suspended inside the discharge port.

[0015] Preferably, the lifting assembly is arranged on the inner side of the conveying assembly, the support platform is used to support the bottom end of the integrated warehouse, and the bottom end of the integrated warehouse is arranged as a curved surface.

[0016] Preferably, the return spring is embedded in a slide groove provided at the bottom end of the support platform, and one end of the return spring is connected to the lifting rod.

[0017] Preferably, the eccentric top block is arranged on one side of the bottom end of the lifting rod, and the rotation of the eccentric top block is used to push the lifting rod to perform angular deflection.

[0018] Preferably, the blast chamber is supported by a blast pipe and arranged on a side corresponding to the drying port, and the blast pipe is communicated with the interior of the blast port.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a lignite continuous drying device, which stores the lignite in separate integrated bins. Once a temperature abnormality or internal flame occurs during the drying process, a sensitive temperature detection device can quickly detect the abnormality and transmit the signal to the drive motor. The drive motor then starts and rotates, causing the angle of the lifting rod to change, thereby lowering the height of the support table. As the support table is lowered, the integrated bin also drops. When the drying port on the side of the integrated bin slides to the bottom, the drying port will be tightly sealed by the conveying assembly. In this way, even if the lignite in a certain integrated bin burns, it can effectively prevent the fire from spreading to other lignites, preventing the occurrence of chain reactions, and providing reliable safety protection for the lignite drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the isolation chamber of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the support frame and the support roller of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the support frame and the conveying assembly of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the cross section of the integrated warehouse of the present invention.

[0026] Figure 6 It is a schematic structural diagram of the conveying assembly and the discharge port of the present invention.

[0027] Figure 7 It is a structural schematic diagram of the integrated warehouse of the present invention.

[0028] Figure 8 It is a schematic structural diagram of the blast chamber of the present invention.

[0029] Fig. 9 It is a front view structural schematic diagram of the support seat and the lifting rod of the present invention.

[0030] In the figure: 11. Isolation bin; 2. Isolation assembly; 21. Support frame; 22. Support roller; 23. Corrugated sheet; 24. Conveying assembly; 25. Discharge port; 26. Integrated bin; 27. Drying port; 28. Isolation net; 29. ​​Guide block; 3. Drying assembly; 31. Blowing bin; 32. Blowing pipe; 33. Blower; 34. Blowing port; 4. Lifting assembly; 41. Support seat; 42. Lifting rod; 43. Drive motor; 44. Eccentric top block; 45. Return spring; 46. Support table. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0033] Combination Figure 1-Figure 9 A lignite continuous drying device includes an isolation bin 11, an isolation assembly 2 is arranged inside the isolation bin 11, and the isolation assembly 2 includes a support roller 22, the support roller 22 and the isolation bin 11 are movably connected, one end of the support roller 22 is connected to a support frame 21, one end of the support roller 22 is connected to the support frame 21, and the other end of the support roller 22 passes through the interior of the isolation bin 11 and extends to the outside of the isolation bin 11 and is connected to a stepper motor. The stepper motor controls the support roller 22 to perform a thirty-degree reciprocating motion. When the stepper motor controls the support roller 22 to rotate, it drives the support frame 21 to rotate, thereby driving the conveying assembly 24 to shake in the front and rear directions. During the drying of the lignite, the movement of the lignite inside is accelerated by shaking in the front and rear directions, so that the drying effect is better.

[0034] It accelerates the movement of lignite inside, allowing the lignite to fully contact the hot air and be heated more evenly, thereby significantly improving the drying effect, greatly shortening the drying time, and improving the overall drying efficiency.

[0035] A conveying assembly 24 is installed inside the support frame 21. The conveying assembly 24 includes a transmission roller, a transmission motor and a transmission belt. The transmission motor drives the transmission roller to rotate, and the transmission roller drives the transmission belt to rotate. A groove is provided on the transmission belt. The integrated bin 26 is slidably connected to the groove on the transmission belt. A through groove is provided on the conveying assembly 24. The integrated bin 26 is embedded in the through groove. The integrated bin 26 and the through groove are slidably connected.

[0036] During the drying operation, the lignite is stored inside the integrated bin 26. When the integrated bin 26 reaches the highest point in the sliding position in the through groove, the drying port 27 on one side of the integrated bin 26 is flush with the upper surface of the transmission belt on the conveying assembly 24. At this time, the lignite can be poured into the interior of the integrated bin 26. When the integrated bin 26 slides to the lowest point in the chute, the drying port 27 will be covered by the discharge port 25, and the drying port 27 will be blocked, so that a relatively independent space is formed inside the integrated bin 26.

[0037] A drying port 27 is provided on one side of the integrated bin 26, and an isolation net 28 is provided inside the integrated bin 26. The isolation net 28 is fixed to the top of the inner wall of the integrated bin 26, and a channel for lignite to pass through is reserved between the bottom of the isolation net 28 and the integrated bin 26. A guide block 29 is also provided inside the integrated bin 26, and the inner side surface of the guide block 29 is arc-shaped. The guide block 29 is arranged directly below the discharge port 25, and hot air is blown into the interior of the integrated bin 26 through the isolation net 28, guided by the guide block 29 and discharged through the discharge port 25. A discharge port 25 is installed at the top of the integrated bin 26, and a corrugated sheet 23 is embedded in the discharge port 25. The corrugated sheet 23 is made of elastic material, and the top of the corrugated sheet 23 is connected to the discharge port 25, and the bottom of the corrugated sheet 23 is suspended inside the discharge port 25. Through the design of the corrugated sheet 23, when hot air is blown into the interior of the integrated bin 26, vibration will occur, which can prevent the lignite from adhering to the discharge port 25.

[0038] By storing the lignite in the integrated bin 26, blowing hot air through the blast port 34, and delivering the hot air to the integrated bin 26, the lignite stored in the integrated bin is dried. The specific operation is as follows:

[0039] In order to facilitate accurate control of the drying degree, a temperature detection device is also provided inside the integrated bin 26, so as to facilitate understanding of the condition of the lignite by detecting the internal temperature.

[0040] A drying component 3 is arranged inside the support frame 21, and the drying component 3 includes a blower 33, on which a blast pipe 32 is installed, and the end of the blast pipe 32 is connected to a blast bin 31, and a blast port 34 is opened on the side of the blast bin 31, and the blast port 34 corresponds to the drying port 27. The blast bin 31 is supported by the blast pipe 32 and arranged on the side corresponding to the drying port 27, and the blast pipe 32 and the blast port 34 are connected inside.

[0041] The support frame 21 and the support roller 22 form an inclined state through the telescopic platform. When the support frame 21 is inclined, the conveying assembly 24 is also inclined. When the lignite falls onto the upper surface of the conveying assembly 24, due to the inclined design, the lignite will slide into the interior of the integrated bin 26. When the lignite slides into the interior of the integrated bin 26, the blast pipe 32 is lowered by the electric push rod and covers the drying port 27 after being lowered. At this time, hot air is produced by the blower 33, and the hot air is transported to the interior of the blast bin 31 through the blast pipe 32 and finally output through the blast port 34. The output hot air corresponds to the drying port 27, and the hot air enters the interior of the integrated bin 26, and the lignite inside is dried. During drying, in order to better circulate the internal air, the direction of the hot air is guided by the guide block 29, so that the hot air circulates inside, thereby achieving the drying of the lignite.

[0042] When the lignite is transported to the integrated bin 26 and subsequently dried, the integrated bin 26 is always placed on the support platform 46. With the support of the support platform 46, the integrated bin 26 slides to the highest point, and the drying port 27 is exposed. In this way, the blast port 34 corresponds to the drying port 27, thereby realizing the drying of the lignite inside the integrated bin 26. After a period of drying, the blast port 34 on the drying component 3 will be pushed by the electric push rod to move up, and then disengage from the drying port 27. After disengagement, it can continue to move forward.

[0043] After drying is finished, the integrated bin 26 is moved along with the transmission of the conveying assembly 24. As the conveying assembly 24 is continuously driven, the integrated bin 26 moves to the lower part of the conveying assembly 24. At this time, the lignite inside the integrated bin 26 is dumped out through the discharge port 25, thereby completing the drying. The emptied integrated bin 26 is transmitted to the upper part of the conveying assembly 24 along with the rotation of the conveying assembly 24. At this time, the lignite is filled into the integrated bin 26 again. This cycle realizes the drying of the lignite.

[0044] The transmission of the conveying assembly 24 realizes automatic unloading. After unloading, the empty integrated bin 26 will return to the loading area again with the rotation of the conveying assembly 24 to carry out a new round of loading and drying, and the whole loading and unloading process is smooth and efficient, which greatly improves work efficiency and production continuity.

[0045] However, a single heating method is used in some drying devices, which leads to over-drying of some lignite. Once combustion occurs, the fire will quickly spread to the entire drying system and is difficult to control. Therefore, there are obvious defects in safety. In order to solve the chain reaction caused by combustion caused by lignite drying, a combination of a lifting component 4 and an isolation component 2 is provided to further avoid the occurrence of this problem. The specific operation is as follows:

[0046] A lifting assembly 4 is installed on the inner wall of the support frame 21, and the lifting assembly 4 includes a support seat 41, and a lifting rod 42 is connected to the support seat 41. A driving motor 43 is installed on the upper surface of the support seat 41, and an eccentric top block 44 is connected to the output end of the driving motor 43. The end of the lifting rod 42 away from the support seat 41 is connected to a support platform 46, and the lifting rod 42 is embedded in a slide groove opened at the bottom end of the support platform 46, and a return spring 45 is embedded in the slide groove. The lifting assembly 4 is arranged on the inner side of the conveying assembly 24, and the support platform 46 is used to support the bottom end of the integrated bin 26. The bottom end of the integrated bin 26 is set as an arc surface, and the return spring 45 is embedded in the slide groove opened at the bottom end of the support platform 46, and one end of the return spring 45 is connected to the lifting rod 42, and the eccentric top block 44 is arranged on one side of the bottom end of the lifting rod 42, and the rotation of the eccentric top block 44 is used to push the lifting rod 42 to deflect at an angle;

[0047] When the lignite is dried, if there is a temperature abnormality and a flame inside, the abnormality is detected by the temperature detection device, and the abnormal signal is transmitted to the drive motor 43, and the drive motor 43 starts to rotate. When the drive motor 43 rotates, the angle of the lifting rod 42 also changes, and the height of the support platform 46 is lowered. When the support platform 46 is lowered, the integrated bin 26 is also lowered accordingly. When the drying port 27 on the side of the integrated bin 26 slides to the bottom, the drying port 27 is blocked by the conveying assembly 24, so that the combustion of the internal lignite will not affect other lignite, and there will be no chain reaction, which is better improved in safety. By controlling the height of the support platform 46, the overlap between the drying port 27 and the conveying assembly 24 is further controlled. When the drying port 27 and the conveying assembly 24 overlap, the spread of the lignite combustion can be prevented, so that the combustion of the lignite can be well controlled;

[0048] In addition, when the drying port 27 is blocked by the conveying assembly 24, the entry of air is blocked, so that the combustion of the lignite can be better maintained.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lignite continuous drying device, comprising an isolation chamber (11), characterized in that: An isolation component (2) is arranged inside the isolation bin (11), the isolation component (2) comprising a support roller (22), the support roller (22) and the isolation bin (11) being movably connected, one end of the support roller (22) being connected to a support frame (21), a conveying component (24) being installed inside the support frame (21), a through slot being provided on the conveying component (24), an integrated bin (26) being embedded inside the through slot, the integrated bin (26) and the through slot being slidably connected, a drying port (27) being provided on one side of the integrated bin (26), an isolation net (28) being arranged inside the integrated bin (26), a guide block (29) being further arranged inside the integrated bin (26), a discharge port (25) being installed at the top end of the integrated bin (26), a corrugated sheet (23) being embedded inside the discharge port (25); A drying component (3) is arranged inside the support frame (21), and the drying component (3) comprises a blower (33), a blast pipe (32) is installed on the blower (33), the end of the blast pipe (32) is connected to a blast bin (31), and a blast port (34) is provided on the side of the blast bin (31), and the blast port (34) corresponds to the drying port (27); The conveying assembly (24) comprises a transmission roller, a transmission motor and a transmission belt. The transmission motor drives the transmission roller to rotate, and the transmission roller drives the transmission belt to rotate. A groove is provided on the transmission belt, and the integrated bin (26) is slidably connected to the groove on the transmission belt. During the drying operation, the lignite is stored inside the integrated bin (26). When the integrated bin (26) reaches the highest point when sliding in the through groove, the drying port (27) on one side of the integrated bin (26) is flush with the upper surface of the transmission belt on the conveying assembly (24). The lignite is poured into the integrated bin (26). When the integrated bin (26) slides to the lowest point in the through groove, the drying port (27) is covered by the discharge port (25). A lifting assembly (4) is installed on the inner wall of the support frame (21), and the lifting assembly (4) includes a support seat (41), a lifting rod (42) is connected to the support seat (41), a driving motor (43) is installed on the upper surface of the support seat (41), an output end of the driving motor (43) is connected to an eccentric top block (44), an end of the lifting rod (42) away from the support seat (41) is connected to a support platform (46), the lifting rod (42) is embedded in a slide groove opened at the bottom end of the support platform (46), and a return spring (45) is embedded in the slide groove; The lifting component (4) is arranged on the inner side of the conveying component (24), and the support platform (46) is used to support the bottom end of the integrated bin (26), and the bottom end of the integrated bin (26) is arranged as a curved surface; In order to facilitate accurate control of the drying degree, a temperature detection device is also provided inside the integrated bin (26), so as to facilitate understanding of the condition of the lignite by detecting the internal temperature; When the lignite is dried, the temperature detection device detects an abnormal signal and transmits it to the drive motor (43), and the drive motor (43) starts to rotate. When the drive motor (43) rotates, the angle of the lifting rod (42) changes, and the height of the support platform (46) is lowered. When the support platform (46) is lowered, the integrated bin (26) is lowered accordingly. When the drying port (27) on the side of the integrated bin (26) slides to the bottom, the drying port (27) is blocked by the conveying assembly (24).

2. A lignite continuous drying device according to claim 1, characterized in that: One end of the support roller (22) is connected to the support frame (21), and the other end of the support roller (22) passes through the interior of the isolation chamber (11), extends to the exterior of the isolation chamber (11) and is connected to a stepper motor, and the stepper motor controls the support roller (22) to perform a thirty-degree reciprocating motion.

3. A lignite continuous drying device according to claim 1, characterized in that: The isolation net (28) is fixed to the top of the inner wall of the integrated bin (26), and a passage for the lignite to pass through is left between the bottom end of the isolation net (28) and the integrated bin (26).

4. The lignite continuous drying device according to claim 1, characterized in that: The inner side surface of the guide block (29) is arc-shaped. The guide block (29) is arranged directly below the discharge port (25). The hot air is blown into the interior of the integrated bin (26) through the isolation net (28), guided by the guide block (29) and discharged through the discharge port (25).

5. The lignite continuous drying device according to claim 1, characterized in that: The corrugated sheet (23) is made of an elastic material, the top end of the corrugated sheet (23) is connected to the discharge port (25), and the bottom end of the corrugated sheet (23) is suspended inside the discharge port (25).

6. The lignite continuous drying device according to claim 1, characterized in that: The return spring (45) is embedded in a slide groove provided at the bottom end of the support platform (46), and one end of the return spring (45) is connected to the lifting rod (42).

7. The lignite continuous drying device according to claim 1, characterized in that: The eccentric top block (44) is arranged on one side of the bottom end of the lifting rod (42), and the eccentric top block (44) is rotated to push the lifting rod (42) to perform angular deflection.

8. The lignite continuous drying device according to claim 1, characterized in that: The blast chamber (31) is supported by the blast pipe (32) and is arranged on a side corresponding to the drying port (27), and the blast pipe (32) and the blast port (34) are internally connected.

Images