Anti-adhesion cooling system

Abstract

The utility model relates to the technical field of compound fertilizer drying equipment, in particular to an anti-adhesion cooling system which comprises a heat insulation sleeve arranged on the bottom wall of a chute, the top of the heat insulation sleeve extends out of a drying machine to be communicated with the outside, and the bottom of the heat insulation sleeve extends into a barrel of the drying machine and is higher than the bottom of the chute. The space between the heat-insulating sleeve and the bottom wall of the chute forms a heat-insulating area, and the bottom of the heat-insulating sleeve and the lower end of the bottom wall of the chute form a mixing area. The utility model can solve the technical problems of adhesion, material blockage and short service life of the chute due to long-term heating in the use process of the existing chute.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite fertilizer drying equipment technical field, specifically is a kind of anti-adhesion cooling system. BACKGROUND

[0002] The production process of composite fertilizer usually includes raw material preparation, granulation, drying, screening, cooling, coating, packaging and other stages, for example, a kind of ammonia acid composite fertilizer produced by our company is prepared in raw material preparation stage, then various materials are transported to granulator for granulation, and after granulation, it is dried by drying equipment. Among them, drying equipment usually adopts roller dryer, as shown in Figure 1 The front end of the dryer 1 is provided with a heating device 2 and a feeding device, and the rear end of the dryer 1 is provided with a discharge port 12, a dust collector 3 and an induced draft fan 4. The feeding device includes a feeding hopper 11 arranged outside the dryer 1 and a chute 5 arranged inside the dryer 1. The material enters the chute 5 from the feeding hopper 11 and is sent to the cylinder 10 of the dryer 1. The heating device 2 is used to blow hot air into the cylinder 10 of the dryer 1.

[0003] However, when hot air is blown into the cylinder 10, hot air will first contact the chute 5, causing the chute 5 to be in a high-temperature state for a long time. On the one hand, the material is easy to adhere to the surface of the chute 5 due to high temperature after contacting the chute 5, causing the chute 5 to be piled up, even the channel to be blocked, causing process failure and being forced to stop for cleaning, reducing production efficiency and product quality stability. On the other hand, the chute 5 is easy to deform, crack, burn out and other problems due to long-term high-temperature roasting, reducing the service life of the chute 5.

[0004] In order to solve the above problems, the industry also uses the way of adding plug insulation cotton at the bottom of the chute to avoid direct contact of the chute with hot air and reduce the temperature of the chute, but this also has the problem of burning through the back heat insulation steel plate due to long-term roasting by hot air, which also increases the maintenance workload. Or by improving the structure of the chute, for example, a new chute of rotary cylinder dryer disclosed in the Chinese utility model patent with publication number CN205957701U, by setting a refractory layer outside the chute and a ceramic lining in the inner layer, the service life of the chute is improved. However, this chute structure is complex and has high use cost.

[0005] Based on this, our company has developed an anti-adhesion cooling system, which uses the self-exhausting effect of the cylinder to introduce natural air from the outside to form an air insulation layer at the bottom of the chute, thereby reducing the temperature of the chute and avoiding long-term roasting of the chute, solving the process problems of adhesion and blockage of the conveying chute, and improving the production efficiency. Moreover, the structure is simple, the manufacturing cost is low, and it is beneficial to save the operating cost of enterprises. UTILITY MODEL CONTENTS

[0006] This invention provides an anti-adhesion cooling system that can solve the technical problems of adhesion, material blockage, and short service life of existing chutes during use due to long-term heat exposure.

[0007] This application provides the following technical solution:

[0008] An anti-adhesion cooling system includes a heat insulation sleeve installed on the bottom wall of a chute. The top of the heat insulation sleeve extends to the outside of the dryer and communicates with the outside. The bottom of the heat insulation sleeve extends into the cylinder of the dryer and its bottom is higher than the bottom of the chute. The space between the heat insulation sleeve and the bottom wall of the chute forms a heat insulation zone, and the bottom of the heat insulation sleeve and the lower end of the bottom wall of the chute form a mixing zone.

[0009] Beneficial effects:

[0010] 1. Because an induced draft fan is installed at the tail end of the dryer, the inside of the dryer cylinder is under negative pressure. By installing a heat insulation sleeve with its bottom extending into the cylinder and its top connected to the outside, the negative pressure inside the cylinder can be used to draw in natural air from the outside into the channel formed by the heat insulation sleeve and the bottom wall of the chute. This forms an air insulation layer in the channel, effectively reducing the temperature of the chute and solving the problem of material sticking and clogging caused by excessively high chute temperature. The resulting insulation zone also protects the chute, preventing it from being baked at high temperatures for a long time, which helps to extend the service life of the chute.

[0011] 2. By setting the bottom of the heat insulation jacket higher than the bottom of the chute, a mixing zone can be formed there. When outside air is discharged from the bottom of the heat insulation jacket, the presence of the mixing zone facilitates the mixing of air and hot air in the mixing zone. Then, the air enters the cylinder with the hot air to dry the material. The existence of the mixing zone provides space for the mixing of air and hot air. Compared with the air being discharged directly into the cylinder, it is beneficial to improve the stability and uniformity of the drying process at the rear end.

[0012] 3. Simple structure and low modification cost: This application only requires the installation of a heat insulation sleeve, which can utilize the existing pressure difference to form an air heat insulation layer. There is no need to modify the chute structure, nor is there a need to add heat insulation equipment and cooling equipment. The production, use and maintenance costs are low, which greatly saves enterprise costs.

[0013] Furthermore, the width of the insulation sleeve is greater than or equal to the width of the bottom wall of the chute.

[0014] Beneficial effect: It helps to provide all-round heat insulation for the bottom wall of the chute.

[0015] Furthermore, the heat insulation sleeve has a semi-circular arc structure.

[0016] Beneficial effects: The semi-circular structure helps to guide the hot air, allowing it to be better introduced into the dryer's drum.

[0017] Furthermore, the top diameter of the insulation sleeve is larger than the bottom diameter of the insulation sleeve.

[0018] Beneficial effects: The inlet end of the insulation jacket is larger than the outlet end, which is conducive to better matching with the bottom wall of the chute, making full use of the blocking effect of the bottom wall of the chute, and improving the mixing effect.

[0019] Furthermore, the angle formed between the bottom of the insulation sleeve and the bottom wall of the chute is greater than or equal to 90°.

[0020] Beneficial effect: It helps to further improve the mixing effect of air and hot air.

[0021] Furthermore, the bottom of the chute does not contact the bottom of the cylinder, and hot air enters the cylinder of the dryer from the bottom and sides of the chute.

[0022] Furthermore, the width of the chute is less than or equal to the inner diameter of the dryer's cylinder. When the width of the chute is equal to the inner diameter of the dryer's cylinder, hot air enters the dryer's cylinder from the bottom of the chute.

[0023] Beneficial effect: When all the hot air enters from the bottom of the chute, it is beneficial to blow away the material at the bottom discharge port of the chute.

[0024] Furthermore, the bottom of the chute is lower than the axis of the dryer.

[0025] Beneficial effects: Since the inside of the cylinder is under negative pressure, setting the bottom of the chute below the axis of the dryer can better utilize the blocking effect of the chute and reduce the energy waste caused by the large opening of the cylinder inlet. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an existing drying equipment;

[0027] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0028] Figure 3 for Figure 2 Schematic diagram of the end faces of the intermediate chute and the heat insulation sleeve;

[0029] Figure 4 This is a schematic diagram of the structure in Example 2;

[0030] Figure 5 This is a schematic diagram of the structure in Example 3;

[0031] Figure 6 This is a schematic diagram of the structure in Example 4. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method:

[0033] The markings in the accompanying drawings include: dryer 1, cylinder 10, feed hopper 11, discharge port 12, heating device 2, dust collector 3, induced draft fan 4, chute 5, bottom wall 51, mixing zone 56, heat insulation sleeve 6, heat insulation channel 61, included angle a.

[0034] Example 1

[0035] like Figures 2-3 As shown, an anti-adhesion cooling system includes a heat insulation sleeve 6 disposed on the bottom wall 51 of the chute 5. The top of the heat insulation sleeve 6 extends to the outside of the dryer 1 and communicates with the outside. The bottom of the heat insulation sleeve 6 extends into the cylinder 10 of the dryer 1, and its bottom is higher than the bottom of the chute 5. The space between the heat insulation sleeve 6 and the bottom wall 51 of the chute 5 forms a heat insulation zone. The bottom of the heat insulation sleeve 6 and the lower end of the bottom wall 51 of the chute 5 form a mixing zone 56.

[0036] Specifically, in this embodiment, the width of the heat insulation sleeve 6 is greater than or equal to the width of the bottom wall 51 of the chute 5. The heat insulation sleeve 6 is welded to the bottom wall 51 of the chute 5, and forms a heat insulation channel 61 with the bottom wall 51 of the chute 5. The inlet of the heat insulation channel 61 is connected to the outside, and the outlet is connected to the cylinder 10 of the dryer 1; more preferably... Figure 3 As shown, in this embodiment, the heat insulation sleeve 6 has a semi-circular arc structure, which is beneficial for guiding the hot air and allowing the hot air to be better introduced into the cylinder 10 of the dryer 1.

[0037] like Figure 2 As shown, in this embodiment, the bottom of the chute 5 does not contact the bottom of the cylinder 10. Hot air enters the cylinder 10 of the dryer 1 from the bottom and sides of the chute 5. The bottom of the chute 5 is lower than the axis of the dryer 1. Since the inside of the cylinder 10 is under negative pressure, setting the bottom of the chute 5 lower than the axis of the dryer 1 can better utilize the blocking effect of the chute 5 and reduce the problem of energy waste caused by the large opening of the cylinder 10 inlet.

[0038] During use, the negative pressure inside the cylinder 10 of the dryer 1 draws in the outside natural air into the heat insulation channel 61, thereby forming an air insulation layer in the channel. This effectively reduces the temperature of the bottom wall 51 of the chute 5, solving the problem of material sticking and clogging caused by excessive temperature of the chute 5. The heat insulation zone formed can protect the chute 5, preventing it from being baked at high temperatures for a long time, which is beneficial to improving the service life of the chute 5.

[0039] When the air in the heat insulation channel 61 is discharged from the bottom, a mixing zone 56 is formed here due to the blocking effect of the bottom wall 51 of the chute 5. This provides space for the mixing of air and hot air, which is conducive to the mixing of air and hot air, thereby improving the stability and uniformity of drying.

[0040] Example 2

[0041] The difference between this embodiment and Embodiment 1 is that, as Figure 4 As shown, the top diameter of the heat insulation sleeve 6 is larger than the bottom diameter of the heat insulation sleeve 6, so that the inlet end of the heat insulation sleeve 6 is larger than the outlet end, which is conducive to better matching with the bottom wall 51 of the chute 5, making full use of the blocking effect of the bottom wall 51 of the chute 5, and improving the mixing effect of air and hot air.

[0042] Example 3

[0043] The difference between this embodiment and Embodiment 1 is that, as Figure 5 As shown, the angle α formed by the bottom of the heat insulation sleeve 6 and the bottom wall 51 of the chute 5 is greater than or equal to 90°. More preferably, in this embodiment, the angle α is 135°, which is beneficial to further improve the mixing effect of air and hot air.

[0044] Example 4

[0045] The difference between this embodiment and Embodiment 1 is that the width of the chute 5 is less than or equal to the inner diameter of the cylinder 10 of the dryer 1. Preferably, the width of the chute 5 is equal to the inner diameter of the cylinder 10. In actual use, since the cylinder 10 rotates relative to the chute 5, to ensure that the two do not interfere with each other, the width of the chute 5 is slightly smaller than the inner diameter of the cylinder 10, so that their edges do not directly contact each other. In this case, most of the hot air passes through the bottom of the chute 5. However, for dryers 1 where the cylinder 10 does not rotate, the width of the chute 5 can be equal to the inner diameter of the cylinder 10. Figure 6 As shown, this allows hot air to enter the cylinder 10 of the dryer 1 mainly from the bottom of the chute 5, which is beneficial for blowing away the material at the bottom outlet of the chute 5.

[0046] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An anti-adhesion cooling system, characterized in that, It includes a heat insulation sleeve installed on the bottom wall of the chute. The top of the heat insulation sleeve extends to the outside of the dryer and communicates with the outside. The bottom of the heat insulation sleeve extends into the cylinder of the dryer and its bottom is higher than the bottom of the chute. The space between the heat insulation sleeve and the bottom wall of the chute forms a heat insulation zone, and the bottom of the heat insulation sleeve and the lower end of the bottom wall of the chute form a mixing zone.

2. The anti-adhesion cooling system according to claim 1, characterized in that: The width of the heat insulation sleeve is greater than or equal to the width of the bottom wall of the chute.

3. The anti-adhesion cooling system according to claim 2, characterized in that: The heat insulation sleeve has a semi-circular arc structure.

4. The anti-adhesion cooling system according to claim 3, characterized in that: The top diameter of the heat insulation sleeve is larger than the bottom diameter of the heat insulation sleeve.

5. The anti-adhesion cooling system according to claim 4, characterized in that: The angle between the bottom of the insulation sleeve and the bottom wall of the chute is greater than or equal to 90°.

6. The anti-adhesion cooling system according to any one of claims 1-5, characterized in that: The bottom of the chute does not contact the bottom of the cylinder, and hot air enters the cylinder of the dryer from the bottom and sides of the chute.

7. The anti-adhesion cooling system according to any one of claims 1-5, characterized in that: The width of the chute is less than or equal to the inner diameter of the dryer's cylinder. When the width of the chute is equal to the inner diameter of the dryer's cylinder, hot air enters the dryer's cylinder from the bottom of the chute.

8. The anti-adhesion cooling system according to claim 7, characterized in that: The bottom of the chute is lower than the axis of the dryer.

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