Pentaerythritol drying and screening device

Abstract

The utility model discloses a kind of pentaerythritol drying and screening devices, including rotary kiln, the rotary kiln is close to the discharge port one end and is provided with screening section, multiple sieve holes are arranged on the circumference wall of screening section;Still include hot air pipeline, the end of hot air pipeline is inserted into rotary kiln from the middle part of the discharge port of rotary kiln, and the end of hot air pipeline exceeds screening section by a distance.Sending hot air into rotary kiln by hot air pipeline, drying pentaerythritol is carried out, and screening section is set at the discharge port of rotary kiln, pentaerythritol is screened by screening section, so that drying and screening are completed on rotary kiln.

Description

Technical Field

[0001] This utility model relates to the technical field of pentaerythritol drying equipment, and in particular to a pentaerythritol drying and sieving device. Background Technology

[0002] In the production process of pentaerythritol, drying is required to remove moisture and improve its quality. Currently, the drying and sieving of pentaerythritol are accomplished through two separate processes: first, pentaerythritol is dried in a rotary kiln, and then it is conveyed to a sieving device for screening. This structure increases the number of equipment and extends the length of the entire production line. During the technical upgrade, our technical personnel, based on the actual site conditions and the existing rotary kiln structure, proposed the pentaerythritol drying and sieving device described in this application. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the problems existing in the background art and provide a pentaerythritol drying and sieving device. Based on the existing rotary kiln structure, hot air is introduced into the rotary kiln through a hot air pipe to dry pentaerythritol, and a sieving section is set at the discharge port of the rotary kiln to sieve pentaerythritol. In this way, drying and sieving are completed on the rotary kiln. To achieve the above-mentioned technical features, the purpose of this utility model is as follows: a pentaerythritol drying and sieving device includes a rotary kiln, wherein a sieving section is provided at one end of the rotary kiln near the discharge port, and a plurality of sieve holes are arranged along the circumferential wall of the sieving section; it also includes a hot air pipe, the end of which is inserted into the rotary kiln from the middle of the discharge port, and the end of the hot air pipe extends beyond the sieving section by a certain distance.

[0004] The screening section is an integral structure with the rotary kiln; or the screening section is installed in connection with the rotary kiln.

[0005] The screening section is enclosed by a cover, with a hopper installed at the bottom of the cover. The screen holes are located inside the cover, and the discharge port extends out of the cover.

[0006] A backflush box is installed at the top inside the housing. The bottom of the backflush box is open. The bottom of the backflush box is set as arc surfaces on both sides of the axial direction of the screening section. The radius of the arc surfaces is larger than the radius of the screening section. There is a gap between the arc surfaces and the outer wall of the screening section. An air inlet pipe is connected to the top of the backflush box and extends out of the housing.

[0007] The radius of the arc surface is 1-2 mm larger than the radius of the sieve section, and there is a 1-2 mm gap between the arc surface and the outer wall of the sieve section.

[0008] The intake pipe is connected to one end of the connecting pipe, and the other end of the connecting pipe is connected to the branch pipe, which is fixed to the hot air duct.

[0009] The other end of the connecting pipe is connected to the air outlet of the fan, and the air inlet of the fan is connected to the branch pipe.

[0010] The backflush box has at least one axle fixedly connected to each of the two sides located on the axial side of the screening section. A rotating wheel is installed on the axle. There is a spring between the top of the backflush box and the top of the cover. A support ring is installed on the top of the cover. The air inlet pipe slides out from the support ring. A telescopic pipe is connected to the top of the air inlet pipe.

[0011] At least one guide post is fixedly installed on each side of the air intake pipe at the top of the backflush box. A guide sleeve is slidably installed on the guide post and fixedly installed on the top of the cover. The spring is fitted on the guide post, with one end of the spring abutting against the cover and the other end abutting against the backflush box.

[0012] The top wall of the casing is a removable cover plate.

[0013] The features of this utility model using the above-mentioned technical solution are: 1. This utility model involves inserting the end of a hot air pipe into a rotary kiln, introducing hot air into the kiln through the hot air pipe, and drying the pentaerythritol inside the kiln as the kiln rotates. A screening section is set at the discharge port of the rotary kiln, and the pentaerythritol is screened through the screening section as it moves from the feed port to the discharge port. In this way, drying and screening are completed on the rotary kiln. 2. The top of the cover of this utility model is equipped with a back-blowing box to back-blowing and clear the blocked screen holes, thereby improving the screening efficiency.

[0014] 3. In the process of rotary kiln rotation, the spring elastically supports the back-blowing box, so that the rotor is in close contact with the outer circumferential wall of the screening section. When there is a deviation in the roundness of the rotary kiln, the gap between the arc surface and the outer wall of the screening section is controlled. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic cross-sectional view of the sieving section in this utility model.

[0018] Figure 3 This is a side view of the backflush box in this utility model.

[0019] Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle.

[0020] Figure 5 for Figure 2 Enlarged structural diagram at point B.

[0021] Figure 6 This is a schematic diagram of a backflush box that is not connected to a hot air duct in a utility model.

[0022] Figure Labels Rotary kiln 10, feed inlet 11, discharge outlet 12; Screening section 20, sieve holes 21, first flange 22; 30. Cover 30, hopper 31, cover plate 32, support ring 33; Hot air duct 40, branch pipe 41; Backflush box 50, arc surface 51, air inlet pipe 52, telescopic pipe 521, wheel axle 53, rotating wheel 54, guide post 55, mounting base 551, limit ring 552, guide sleeve 553, spring 56; Connecting pipe 60, fan 70. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0025] Example 1: See Figure 1 A pentaerythritol drying and sieving device includes a rotary kiln 10, a sieving section 20 provided at one end of the rotary kiln 10 near the discharge port 12, and a plurality of sieve holes 21 arranged along the circumferential wall of the sieving section 20; it also includes a hot air duct 40, the end of the hot air duct 40 being inserted into the rotary kiln 10 from the middle of the discharge port 12, and the end of the hot air duct 40 extending beyond the sieving section 20 by a certain distance.

[0026] See Figure 1The rotary kiln 10 has a feed inlet 11 at the higher end and a discharge outlet 12 at the lower end. The end of the hot air pipe 40 is inserted into the rotary kiln 10, and hot air is introduced into the rotary kiln 10 through the hot air pipe 40. When the rotary kiln 10 rotates, the pentaerythritol inside the rotary kiln 10 is dried. A screening section 20 is set at the discharge outlet 12 of the rotary kiln 10. When the pentaerythritol moves from the feed inlet 11 to the discharge outlet 12, it is screened through the screening section 20. In this way, drying and screening are completed on the rotary kiln, which can reduce the number of equipment. In practice, the screening section 20 can be an integral part of the rotary kiln 10.

[0027] Alternatively, one can use, such as Figure 2 The structure shown is that the screening section 20 is connected to the rotary kiln 10. Specifically, a first flange 22 is welded to the outer wall of one end of the screening section 20, and a second flange 13 is welded to the outer wall of the material discharge end of the rotary kiln 10. The first flange 22 and the second flange 13 are connected by bolts.

[0028] Example 2: Based on Example 1, to facilitate the collection of pentaerythritol after sieving, see [reference needed]. Figure 1 , 2 The screening section 20 is covered by a cover 30. A hopper 31 is installed at the bottom of the cover 30. The screen holes 21 are located inside the cover 30, and the discharge port 12 extends out of the cover 30.

[0029] Example 3: During the sieving process, the sieve holes 21 are very prone to clogging. Therefore, based on Example 2, see... Figure 6 A backflush box 50 is installed at the top inside the housing 30. The lower end of the backflush box 50 is open. The lower end of the backflush box 50 is configured with arc surfaces 51 on both sides of the axial direction of the screening section 20. The radius of the arc surfaces 51 is larger than the radius of the screening section 20. There is a gap between the arc surfaces 51 and the outer wall of the screening section 20. An air inlet pipe 52 is connected to the top of the backflush box 50 and extends out of the housing 30. This structure allows for backflush to clear any blockages in the screen holes 21. During use, air is introduced into the air inlet pipe 52.

[0030] In this embodiment, the radius of the arc surface 51 is 1-2 mm larger than the radius of the sieve section 20, and there is a 1-2 mm gap between the arc surface 51 and the outer wall of the sieve section 20 to improve the sealing performance.

[0031] Further, see Figure 2 One end of the air inlet pipe 52 is connected to the connecting pipe 60, and the other end of the connecting pipe 60 is connected to the branch pipe 41, which is fixed to the hot air duct 40. In this way, the hot air in the hot air duct 40 can be used to back-blown and unclog the screen holes 21.

[0032] Furthermore, the other end of the connecting pipe 60 is connected to the air outlet of the fan 70, and the air inlet of the fan 70 is connected to the branch pipe 41. The fan 70 draws hot air from the hot air duct 40 and increases the air pressure in the backflush box 50. In this embodiment, the fan 70 is a centrifugal fan.

[0033] For ease of installation of the backflush box 50 inside the housing 30, see [link / reference]. Figure 2 The top wall of the cover 30 is a removable cover plate 32, which is screwed onto the top of the cover 30.

[0034] Example 4: Based on Example 3, due to the roundness deviation of the rotary kiln 10, the gap between the arc surface 51 and the outer wall of the screening section 20 cannot be well controlled within 1~2mm. Therefore, see... Figure 2 , 3 5. The backflush box 50 has one or two axles 53 fixedly connected to both sides of the axial direction of the screening section 20. A rotating wheel 54 is mounted on each axle 53. A spring 56 is located between the top of the backflush box 50 and the top of the cover 30. (See also...) Figure 5 A support ring 33 is installed on the top of the casing 30, and the air inlet pipe 52 slides out from the support ring 33. A telescopic pipe 521 is connected to the top of the air inlet pipe 52. The rotary wheel 54 is supported on the outer circumferential wall of the screening section 20, thereby controlling the gap between the arc surface 51 and the outer wall of the screening section 20 to be 1~2mm. During the rotation of the rotary kiln 10, the spring 56 elastically supports the back-blowing box 50, so that the rotary wheel 54 is in close contact with the outer circumferential wall of the screening section 20.

[0035] In this embodiment, the rotating wheel 54 can be a bearing, or it can be a roller mounted on the axle 53 via a bearing.

[0036] Further, see Figure 4 At least one guide post 55 is fixedly installed on each side of the air inlet pipe 52 on the top of the backflush box 50. A guide sleeve 553 is slidably installed on the guide post 55 and fixedly installed on the top of the cover 30. A spring 56 is fitted on the guide post 55, with one end of the spring 56 abutting against the cover 30 and the other end abutting against the backflush box 50. Through the cooperation of the guide post 55 and the guide sleeve 553, the backflush box 50 is guided so that when the rotary kiln 10 rotates, the backflush box 50 can only move up and down.

[0037] Specifically, see Figure 4 The top of the backflush box 50 is fixedly mounted with a mounting base 551 by bolts. The guide post 55 is fixedly mounted on the mounting base 551. The top of the guide post 55 is fitted with a limit ring 552 by screws. In this way, when disassembling the backflush box 50, the backflush box 50 can be taken out after removing the cover plate 32.

[0038] It should be noted that, in order to reduce the leakage of hot air from the discharge port 12 of the rotary kiln 10, an end cover is installed at the discharge port 12 of the rotary kiln 10. The end cover is fixedly connected to the hot air duct 40, and there is a gap between the end cover and the discharge port 12 of the rotary kiln 10. A discharge port is provided at the lower end of the end cover.

[0039] The working principle or process of the utility model: When using, please refer to Figure 1 , 2 Pentaerythritol enters the rotary kiln 10 through the feed inlet 11 for drying. A screening section 20 is set at the discharge outlet 12 of the rotary kiln 10. As pentaerythritol moves from the feed inlet 11 to the discharge outlet 12, it is screened through the screening section 20. The screened pentaerythritol is discharged from the feed hopper 31 at the bottom of the cover 30.

[0040] During the rotation of the rotary kiln 10, the spring 56 elastically supports the back-blowing box 50, so that the rotor 54 is in close contact with the outer circumferential wall of the screening section 20. By introducing air into the back-blowing box 50, the blocked screen holes 21 are cleared by back-blowing.

[0041] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Any modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A pentaerythritol drying and sieving device, comprising a rotary kiln (10), characterized in that: The rotary kiln (10) has a screening section (20) near the discharge port (12), and the screening section (20) has multiple screen holes (21) arranged along the circumferential wall. It also includes a hot air duct (40), the end of which is inserted into the rotary kiln (10) from the middle of the discharge port (12) and the end of the hot air duct (40) extends beyond the screening section (20) by a certain distance.

2. The pentaerythritol drying and sieving device according to claim 1, characterized in that: The screening section (20) is an integral structure with the rotary kiln (10); or the screening section (20) is installed in connection with the rotary kiln (10).

3. The pentaerythritol drying and sieving device according to claim 1, characterized in that: The screening section (20) is covered by a cover (30), and a hopper (31) is installed at the bottom of the cover (30). The screen holes (21) are located inside the cover (30), and the discharge port (12) extends out of the cover (30).

4. The pentaerythritol drying and sieving device according to claim 3, characterized in that: A backflush box (50) is installed at the top inside the cover (30). The lower end of the backflush box (50) is open. The lower end of the backflush box (50) is located on both sides of the axial direction of the screening section (20) and is respectively set as arc surfaces (51). The radius of the arc surface (51) is larger than the radius of the screening section (20). There is a gap between the arc surface (51) and the outer wall of the screening section (20). An air inlet pipe (52) is connected to the top of the backflush box (50). The air inlet pipe (52) extends out of the cover (30).

5. The pentaerythritol drying and sieving device according to claim 4, characterized in that: The radius of the arc surface (51) is 1-2 mm larger than the radius of the sieve section (20), and there is a 1-2 mm gap between the arc surface (51) and the outer wall of the sieve section (20).

6. The pentaerythritol drying and sieving device according to claim 4, characterized in that: The intake pipe (52) is connected to one end of the connecting pipe (60), and the other end of the connecting pipe (60) is connected to the branch pipe (41). The branch pipe (41) is fixed to the hot air pipe (40).

7. The pentaerythritol drying and sieving device according to claim 6, characterized in that: The other end of the connecting pipe (60) is connected to the air outlet of the fan (70), and the air inlet of the fan (70) is connected to the branch pipe (41).

8. A pentaerythritol drying and sieving device according to any one of claims 4 to 7, characterized in that: The backflush box (50) has at least one axle (53) fixedly connected to both sides of the axial direction of the screening section (20). A rotating wheel (54) is installed on the axle (53). A spring (56) is between the top of the backflush box (50) and the top of the cover (30). A support ring (33) is installed on the top of the cover (30). An air inlet pipe (52) slides out from the support ring (33). A telescopic pipe (521) is connected to the top of the air inlet pipe (52).

9. The pentaerythritol drying and sieving device according to claim 8, characterized in that: At least one guide post (55) is fixedly installed on the top of the backflush box (50) on both sides of the air inlet pipe (52). A guide sleeve (553) is slidably installed on the guide post (55) and the guide sleeve (553) is fixedly installed on the top of the cover (30). The spring (56) is fitted on the guide post (55), with one end of the spring (56) abutting against the cover (30) and the other end abutting against the backflush box (50).

10. A pentaerythritol drying and sieving device according to claim 3, characterized in that: The top wall of the cover (30) is a removable cover plate (32).

Images