Particle cooling device

Abstract

According to the particle cooling device, the partition plate is arranged in the cooling tower to divide the space in the tower into the cooling area on the upper portion and the air inlet area on the lower portion, meanwhile, the porous material basket which penetrates through the partition plate and communicates with the cooling area and the air inlet area is arranged, feed to be cooled is restrained in the material basket, and cold air blown in by the draught fan is adopted for cooling; due to the fact that the porous structure of the material basket can intercept part of crushed aggregates, dust and the like generated in the feed cooling process while cooling air penetrates through the porous structure of the material basket, the carrying rate of the feed dust and the crushed aggregates in discharged waste gas obtained after heat exchange can be reduced, the treatment load of follow-up treatment equipment can be reduced while material loss is reduced, and the service life of the feed is prolonged. The defects that in a traditional cooling mode, when feed is cooled through air cooling, the rate of dust in exhausted waste gas is high, consequently, follow-up treatment is difficult, and feed loss is high are overcome.

Description

Technical Field

[0001] The present application relates to the technical field of material cooling, and in particular to a particle cooling device. Background Art

[0002] Cooling is an essential process in the production of pellet feed. The pellets pressed out of the pellet mill have a relatively low hardness and are easy to break due to the high temperature (about 85°C during steam conditioning) and high humidity (the water content of the pellets is about 16%). They are also not suitable for long-term storage and are prone to mold and deterioration. They must be cooled and dehydrated.

[0003] The existing mainstream cooling method is that in the cooling device, the hot and humid feed particles are in countercurrent contact with the low-temperature cooling air, and mass and heat transfer occur to cool the feed while reducing the moisture content therein. However, in the existing method, when the hot and humid feed is in countercurrent contact with the cooling air, some finely divided feed particles will be discharged with the cooling air, which not only makes the discharged cooling air high in dust content, making the subsequent dust removal process complicated, but also the broken materials discharged with the cooling air will cause high material loss during the production process. Utility Model Content

[0004] The present application provides a pellet cooling device to solve the problems of high dust rate in the exhaust gas discharged in the existing method of cooling feed by air cooling, which leads to difficulty in subsequent treatment and high material loss.

[0005] The present application provides a particle cooling device, comprising a cooling tower, wherein the top of the cooling tower is connected to a feeder; the bottom of the cooling tower is connected to a discharge mechanism;

[0006] The cooling tower is divided into an upper cooling area and a lower air intake area by partitions;

[0007] The cooling zone and the air inlet zone are connected through a vertically arranged material basket, both ends of which are open, the upper end of which extends to the top of the cooling tower and is connected to the output end of the feeder, and the lower end is connected to the material input end of the discharge mechanism;

[0008] The basket is a hollow porous structure as a whole, and the position where the basket passes through the partition is a closed setting;

[0009] At least one air inlet window is provided on the side of the air inlet area of ​​the cooling tower, and a fan is installed in the air inlet window;

[0010] At least one exhaust port is provided on the upper portion of the side of the cooling tower.

[0011] Optionally, a distribution tray is provided at the upper inner part of the material basket near the output end of the feeder. The distribution tray is a conical surface structure and is fixed in the material basket by connecting ribs.

[0012] Optionally, the feeder includes a hopper and a lower silo connected to the hopper;

[0013] The lower bin is also connected to the basket;

[0014] A rotating shaft is arranged in the lower material bin, one end of which passes through a side wall of the lower material bin and is connected to the motor;

[0015] A plurality of blades are arranged on the outer periphery of the rotating shaft in the lower bin, and the blades are arranged along the length direction of the rotating shaft;

[0016] One side of the blade is fixedly connected to the rotating shaft, and the other side is close to the inner wall of the lower silo.

[0017] Optionally, a filter is provided outside the air inlet window.

[0018] Optionally, the partition is inclined downward in a direction away from the central axis of the cooling tower;

[0019] A crushed material outlet is provided on the side of the cooling tower near the upper surface of the partition.

[0020] Optionally, the inner wall of the portion of the basket located in the cooling zone is provided with multiple layers of drop plates in sequence from top to bottom;

[0021] The drop plates of two adjacent layers are arranged in a staggered manner;

[0022] The falling plate is provided with a plurality of through holes whose apertures are smaller than the average particle diameter of the feed.

[0023] Optionally, the exhaust port is connected in series with a dust collector, a circulating fan, a heat exchanger and an incinerator;

[0024] The heat exchanger is also connected to the condensate tank.

[0025] The present application provides a particle cooling device, which divides the space in the cooling tower into an upper cooling zone and a lower air inlet zone by arranging a partition in the cooling tower, and at the same time arranging a porous feed basket that passes through the partition and connects the cooling zone and the air inlet zone, so that the feed to be cooled is confined in the feed basket, and cooled by cold air blown in by a fan. Since the porous structure of the feed basket can intercept part of the crushed materials, dust, etc. generated in the cooling process of the feed while passing the cooling air, the carrying rate of feed dust and crushed materials in the exhaust gas discharged after heat exchange can be reduced, thereby reducing the material loss and the processing load of the subsequent processing equipment at the same time, overcoming the disadvantages of the high dust rate in the exhaust gas discharged when cooling the feed by air cooling in the traditional cooling method, which leads to the difficulty of subsequent processing and high material loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the structure of a particle cooling device provided in one embodiment of the present application;

[0028] Figure 2 A schematic structural diagram of a particle cooling device provided in another embodiment of the present application;

[0029] Figure 3 A schematic diagram of the structure of a feeder provided in one embodiment of the present application;

[0030] Figure 4 A schematic diagram of the structure of a rotating shaft provided in one embodiment of the present application;

[0031] Figure 5 A schematic structural diagram of a particle cooling device provided in yet another embodiment of the present application;

[0032] Figure 6 A schematic structural diagram of a particle cooling device provided in yet another embodiment of the present application;

[0033] Figure 7 A schematic diagram of the structure of a particle cooling device provided in one embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Cooling tower; 2. Distributor; 3. Discharge mechanism; 4. Dust collector; 5. Circulation fan; 6. Heat exchanger; 7. Incinerator; 11. Partition; 12. Material basket; 13. Air inlet window; 14. Distribution plate; 15. Drop plate; 21. Hopper; 22. Lower bin; 61. Condensate tank; 101. Exhaust port; 102. Crushed material outlet; 131. Fan; 132. Filter; 221. Rotating shaft; 222. Motor; 223. Blades. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0037] like Figure 1As shown, the present application provides a particle cooling device, including a cooling tower 1, the top of the cooling tower 1 is connected to a feeder 2; the bottom of the cooling tower 1 is connected to a discharge mechanism 3

[0038] The cooling tower 1 is divided into an upper cooling zone and a lower air intake zone by a partition 11;

[0039] The cooling zone and the air inlet zone are connected through a vertically arranged material basket 12. Both ends of the material basket 12 are open, the upper end extends to the top of the cooling tower 1 and is connected to the output end of the feeder 2, and the lower end is connected to the material input end of the discharge mechanism 3;

[0040] The material basket 12 is a hollow porous structure as a whole, and the position where the material basket 12 passes through the partition 11 is closed;

[0041] At least one air inlet window 13 is provided on the side of the air inlet area of ​​the cooling tower 1, and a fan 131 is installed in the air inlet window 13;

[0042] At least one exhaust port 101 is provided at the upper portion of the side surface of the cooling tower 1 .

[0043] When in use, the newly made feed pellets discharged from the feed pellet press with high temperature (85-95°C) and certain humidity (water content 16-18%) fall into the feeder 2, and are transferred to the feed basket 12 through the feeder 2. At the same time, the fan 131 in the wind window 13 is turned on to let the outside air enter the cooling area of ​​the cooling tower 1 and move upward.

[0044] The hot and humid feed falling into the basket 12 is cooled by heat exchange with the upward cooling air, and then falls into the discharge mechanism 3 (a screw feeder in this application), and is output to the corresponding receiving container through the discharge mechanism 3.

[0045] The air blown into the cooling tower 1 from the wind window 13 contacts the feed in countercurrent, causing mass transfer and heat transfer, cooling the feed and taking away the moisture therein. When the blown cooling air goes up to the connection between the partition 11 and the basket 12, the cross-sectional area here becomes smaller, so when the upward cooling air passes through this place, the wind speed increases, and the material falling here is blown more strongly, thereby strengthening the mass transfer and heat transfer process between the feed and the cooling air. When the cooling air enters the cooling area through this connection, its flow rate will increase due to the increase in the flow area, and the basket 12 set at the end here can also play a role in draining the cooling air, allowing part of the cooling air passing through the connection to move upward along the outer circumference of the basket 12 for a distance. The wind entering the cooling zone moves from bottom to top. Part of the cooling air moving upward enters the basket 12 and transfers mass and heat with the falling feed, and the other part moves upward from the outside of the basket 12. Due to the structure of the connection between the basket 12 and the partition, the basket 12 in the cooling zone is bucket-shaped, that is, the side of the basket 12 is inclined. The cooling air from bottom to top can increase the contact area between the cooling air and the side of the basket 12 when passing through the side of the basket 12, so that mass and heat can be transferred with the feed close to the inner wall of the basket 12 and falling from the inner wall of the basket 12, thereby cooling this part of the material. In the present application, since the feed falls in the basket 12, some finely divided materials will be intercepted by the basket 12 during the cooling process of the cooling air, thereby reducing the dust carrying rate in the discharged exhaust gas.

[0046] The cooling air after the feed is cooled, that is, the waste gas is discharged from the exhaust port 101 at the upper part of the cooling tower 1. Since it also carries some feed dust, it is purified and then discharged.

[0047] The present application provides a particle cooling device, which divides the space in the tower into an upper cooling zone and a lower air inlet zone by arranging a partition 11 in a cooling tower 1, and at the same time arranging a porous basket 12 that passes through the partition 11 and connects the cooling zone and the air inlet zone, so that the feed to be cooled is confined in the basket 12, and cooled by cold air blown in by a fan 131. Since the porous structure of the basket 12 can intercept part of the crushed materials and dust generated in the cooling process of the feed while passing the cooling air, the carrying rate of feed dust and crushed materials in the exhaust gas discharged after heat exchange can be reduced, thereby reducing the material loss and the processing load of the subsequent processing equipment at the same time, overcoming the disadvantages of the high dust rate in the exhaust gas discharged when cooling the feed by air cooling in the traditional cooling method, which leads to the difficulty of subsequent processing and high material loss.

[0048] like Figure 2 As shown, optionally, a distribution tray 14 is provided at the upper inner portion of the basket 12 near the output end of the feeder 2. The distribution tray 14 is a conical surface structure and is fixed in the basket 12 by connecting ribs.

[0049] In the present application, the hot and wet feed falling toward the feed basket 12 first falls onto the distribution tray 14 for buffering and is dispersed by the distribution tray 14. Since the distribution tray 14 is conical in shape, that is, high in the middle and low around, the feed falling onto the distribution tray 14 will fall from the outer periphery of the distribution tray 14, which can disperse the feed and fall in a thin layer along the outer periphery of the distribution tray 14, thereby improving the heat exchange efficiency.

[0050] like Figure 3 and Figure 4 As shown, optionally, the feeder 2 includes a hopper 21 and a lower hopper 22 connected to the hopper;

[0051] The lower bin 22 is also connected to the basket 12;

[0052] A rotating shaft 221 is disposed in the lower material bin 22, one end of the rotating shaft 221 passes through a side wall of the lower material bin 22 and is connected to a motor 222;

[0053] A plurality of blades 223 are arranged on the outer periphery of the rotating shaft 221 in the lower bin 22, and the blades are arranged along the length direction of the rotating shaft 221;

[0054] One side of the blade 223 is fixedly connected to the rotating shaft 221 , and the other side is close to the inner wall of the lower bin 22 .

[0055] When in use, the newly made feed particles with high temperature (85-95°C) and certain humidity (water content 16-18%) discharged from the feed pellet press fall into the hopper 21 of the feeder 2, and the motor 222 connected to the rotating shaft 221 is started. The motor 222 rotates to drive the rotating shaft 221 to rotate, and then the blades 223 on the rotating shaft 221 also rotate accordingly. When the blades 223 rotate, they transfer the materials in the hopper 21 in batches to the output end direction of the lower hopper 22, and fall into the basket 12.

[0056] The arrangement of the rotating shaft 221 in the material discharge bin 22 and the blades 223 on the rotating shaft 221 can achieve the purpose of batch material discharge, and can effectively avoid the disadvantages of the traditional straight-through hopper that is difficult to control the material discharge amount, causing material accumulation and resulting in poor cooling effect. In addition, this arrangement can also effectively prevent cooling air from blowing out of the hopper 21.

[0057] like Figure 5 As shown, optionally, a filter 132 is provided outside the air inlet window 13 .

[0058] In the present application, the filter 132 is provided to intercept particulate impurities and the like in the external air sucked by the fan 131 to ensure the cleanliness of the cooling air.

[0059] like Figure 5 As shown, optionally, the partition 11 is inclined downward in a direction away from the central axis of the cooling tower 1;

[0060] A crushed material outlet 102 is provided on the side of the cooling tower 1 near the upper surface of the partition 11 .

[0061] In the present application, during cooling, since the basket 12 is a porous structure, some crushed materials or feed dust will pass through these small holes and enter the space between the basket 12 and the tower body of the cooling tower 1, so it is necessary to clean it regularly. Since the partition 11 is inclined downward away from the central axis of the cooling tower 1, these crushed materials or feed dust will be collected at the inclined part of the partition 11. The operator can clean these crushed materials through the crushed material outlet 102 and recycle them for pelletizing again.

[0062] like Figure 6 As shown, optionally, the basket 12 is located in the cooling zone, and the inner wall is provided with multiple layers of drop plates 15 in sequence from top to bottom;

[0063] Two adjacent layers of drop plates 15 are arranged in a staggered manner;

[0064] The drop plate 15 is provided with a plurality of through holes, each of which has a diameter smaller than the average particle diameter of the feed.

[0065] In the present application, the feed spread by the distribution plate 14 falls onto the drop plate 15, is buffered on the multi-layer drop plate 15, passes through the closing part of the basket 12, falls into the discharge mechanism 3, and is output to the corresponding receiving container through the discharge mechanism 3.

[0066] The drop plates 15 can play a role of buffering and, due to their staggered structure, can also play a role of stirring the feed; through holes are provided on the drop plates 15 to facilitate cooling of the feed by cooling air.

[0067] like Figure 7 As shown, optionally, the exhaust port 101 is connected in series with the dust collector 4, the circulating fan 5, the heat exchanger 6 and the incinerator 7 in sequence;

[0068] The heat exchanger 6 is also connected to a condensed water tank 61 .

[0069] In the present application, the cooling air after cooling the feed, that is, the waste gas, is discharged from the exhaust port 101 at the top of the cooling tower 1. Since it also carries some feed dust, it is passed through the dust collector 4 (cyclone dust collector or bag dust collector or electrostatic dust collector in the present application) to remove dust, and then passed into the heat exchanger 6 to cool the waste gas and recover the heat therein. During the process of cooling the waste gas, the water vapor therein will condense, and the condensed water obtained by condensation will be collected in the condensation water tank 61 for recovery. Since the waste gas after heat exchange carries the odor molecules in the feed (the odor presented by each component of the feed is mainly some volatile organic matter, such as acid, alcohol, hydrocarbon organic matter), direct discharge will have an adverse effect on the environment, so it is passed into the incinerator 7 for incineration for harmless treatment.

[0070] A particle cooling device, the use process of which is as follows:

[0071] When in use, the newly made feed pellets discharged from the feed pellet press with high temperature (85-95°C) and certain humidity (water content 16-18%) fall into the hopper 21 of the feeder 2, and the motor 222 connected to the rotating shaft 221 is started. The motor 222 rotates to drive the rotating shaft 221 to rotate, and then the blades 223 on the rotating shaft 221 also rotate accordingly. When the blades 223 rotate, the materials in the hopper 21 are transferred to the output end direction of the lower hopper 22 in batches, and fall into the basket 12. At the same time, the fan 131 in the wind window 13 is turned on, and the outside air is filtered through the filter 132 and passed into the cooling area of ​​the cooling tower 1, and moves upward.

[0072] The hot and wet feed falling toward the feed basket 12 first falls onto the distribution plate 14 for buffering and is dispersed by the distribution plate 14. Since the distribution plate 14 is conical in shape, that is, high in the middle and low around, the feed falling onto the distribution plate 14 will fall from the outer periphery of the distribution plate 14, which can disperse the feed and fall in a thin layer along the outer periphery of the distribution plate 14, which can improve the heat exchange efficiency. The feed dispersed by the distribution plate 14 falls onto the drop plate 15, and after being buffered on the multi-layer drop plates 15, it passes through the closing part of the feed basket 12 and falls into the discharge mechanism 3, and is output to the corresponding receiving container through the discharge mechanism 3.

[0073] The air blown into the cooling tower 1 from the wind window 13 contacts the feed in countercurrent, and mass and heat transfer occur, cooling the feed and taking away the moisture therein. When the blown cooling air goes up to the connection between the partition 11 and the basket 12, the cross-sectional area here becomes smaller, so when the upward cooling air passes through this place, the wind speed increases, and the material falling here is blown more strongly, thereby strengthening the mass and heat transfer process of the feed and cooling air. When the cooling air enters the cooling area through this connection, its flow rate will increase due to the increase in the flow area, and the basket 12 set at the end here can also play a role in draining the cooling air, so that part of the cooling air passing through the connection can move upward along the outer circumference of the basket 12 for a distance. The wind entering the cooling zone moves from bottom to top. Part of the cooling air moving upward enters the basket 12 and transfers mass and heat with the falling feed, and the other part moves upward from the outside of the basket 12. Due to the structure of the closed end of the connection between the basket 12 and the partition 11, the basket 12 in the cooling zone is bucket-shaped, that is, the side of the basket 12 is inclined. The cooling air from bottom to top can increase the contact area between the cooling air and the side of the basket 12 when passing through the side of the basket 12, so that mass and heat can be transferred with the feed close to the inner wall of the basket 12 and falling from the inner wall of the basket 12, thereby cooling this part of the material. In the present application, since the feed falls in the basket 12, some finely divided materials will be intercepted by the basket 12 during the cooling process of the cooling air, thereby reducing the dust carrying rate in the discharged exhaust gas.

[0074] The cooling air after the feed is cooled, that is, the waste gas is discharged from the exhaust port 101 at the top of the cooling tower 1. Since it also carries some feed dust, it is passed through the dust collector 4 (cyclone dust collector or bag dust collector or electrostatic dust collector in this application) to remove dust, and then passed into the heat exchanger 6 to cool the waste gas and recover the heat therein. During the cooling process of the waste gas, the water vapor therein will condense, and the condensed water obtained by condensation will be collected in the condensation water tank 61 for recovery. Since the waste gas after heat exchange carries odor molecules in the feed, direct discharge will have an adverse effect on the environment, so it is passed into the incinerator 7 for incineration for harmless treatment.

[0075] During cooling, since the basket 12 has a porous structure, some crushed materials or feed dust will pass through these small holes and enter the space between the basket 12 and the tower body of the cooling tower 1, so it is necessary to clean it regularly. Since the partition 11 is inclined downward away from the central axis of the cooling tower 1, these crushed materials or feed dust will be collected at the inclined part of the partition 11. The operator can clean these crushed materials through the crushed material outlet 102 and recycle them for pelletizing again.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A particle cooling device, characterized in that: It comprises a cooling tower (1), wherein the top of the cooling tower (1) is connected to a feeder (2); and the bottom of the cooling tower (1) is connected to a discharge mechanism (3); The cooling tower (1) is divided into an upper cooling zone and a lower air intake zone by a partition (11); The cooling zone and the air inlet zone are connected via a vertically arranged material basket (12), the two ends of the material basket (12) are open, the upper end extends to the top of the cooling tower (1) and is connected to the output end of the feeder (2), and the lower end is connected to the material input end of the discharge mechanism (3); The material basket (12) is a hollow porous structure as a whole, and the position where the material basket (12) passes through the partition (11) is closed; At least one air inlet window (13) is provided on the side of the air inlet area of ​​the cooling tower (1), and a fan (131) is installed in the air inlet window (13); At least one exhaust port (101) is provided on the upper portion of the side of the cooling tower (1).

2. The particle cooling device according to claim 1, characterized in that: A material distribution disc (14) is arranged at the upper inner part of the material basket (12) near the output end of the feeder (2); the material distribution disc (14) is a conical surface structure and is fixed in the material basket (12) by connecting ribs.

3. The particle cooling device according to claim 1, characterized in that: The feeder (2) comprises a hopper (21) and a lower silo (22) connected to the hopper; The lower material bin (22) is also connected to the material basket (12); A rotating shaft (221) is arranged in the lower material bin (22), and one end of the rotating shaft (221) passes through a side wall of the lower material bin (22) and is connected to a motor (222); A plurality of blades (223) are arranged on the outer periphery of the rotating shaft (221) in the lower material bin (22), and the blades are arranged along the length direction of the rotating shaft (221); One side surface of the blade (223) is fixedly connected to the rotating shaft (221), and the other side surface is close to the inner wall of the lower bin (22).

4. The particle cooling device according to claim 1, characterized in that: A filter screen (132) is arranged outside the air inlet window (13).

5. The particle cooling device according to claim 1, characterized in that: The partition plate (11) is inclined downward in a direction away from the central axis of the cooling tower (1); A crushed material outlet (102) is provided on the side of the cooling tower (1) near the upper surface of the partition (11).

6. The particle cooling device according to claim 2, characterized in that: The basket (12) is located in the cooling zone, and the inner wall thereof is provided with multiple layers of drop plates (15) in sequence from top to bottom; The drop plates (15) of two adjacent layers are arranged in a staggered manner; The drop plate (15) is provided with a plurality of through holes, each having a diameter smaller than the average particle diameter of the feed.

7. The particle cooling device according to any one of claims 1 to 6, characterized in that: The exhaust port (101) is connected in series with the dust collector (4), the circulating fan (5), the heat exchanger (6) and the incinerator (7); The heat exchanger (6) is also connected to a condensation water tank (61).

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