A segmented drying machine and drying method

Abstract

The present invention relates to a sectional drying machine and a drying method, wherein the sectional drying machine comprises a box, a pre-drying conveyor belt, a material turning mechanism, a drying conveyor belt, a strip cutter and a fan; the material turning mechanism is arranged above the pre-drying conveyor belt, the pre-drying conveyor belt is arranged above the drying conveyor belt, the strip cutter is arranged below the unloading end of the pre-drying conveyor belt, the loading end of the drying conveyor belt is located below the strip cutter, and the fan is arranged on the box for drying. The sectional drying machine and the method integrate the pre-drying mechanism and the drying mechanism into one device, which reduces the equipment footprint compared to the prior art, and is simple to operate and has high working efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of drying, and in particular to a sectional drying machine and a drying method. Background Art

[0002] In the prior art, before the dryer transfers the sludge to the conveyor belt for drying, the sludge needs to be cut into strips by a strip cutter to increase the thermal contact area of ​​the sludge, so as to achieve the effect of quickly and evenly evaporating the water in the sludge. The strip cutter of the sludge dryer is suitable for sludge with a moisture content of less than 80% or other materials to be dried. When the moisture content is greater than 80%, the material cannot be smoothly cut into strips due to its strong fluidity. In the prior art, when drying high-humidity materials such as sludge, chicken manure and other materials with a moisture content greater than 80%, especially sludge with a moisture content of 85-90%, it is necessary to pre-dry the material in another dryer before the material enters the dryer for strip cutting and drying, or to reduce the moisture of the material to be dried to less than 80% by means of sun drying, pressurization, adding ingredients, etc. The operation process is complicated, the work efficiency is low, and the manpower and material costs are high. When the dryer is used for pre-drying, two dryers are required, and the equipment cost is high and the floor space is large. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the present invention provides a segmented drying machine, which has the advantages of small footprint, high drying efficiency and low labor cost. The specific scheme is as follows:

[0004] A segmented drying machine includes a box, a pre-drying conveyor belt, a material turning mechanism, a drying conveyor belt, a strip cutter, and a fan; the material turning mechanism is arranged above the pre-drying conveyor belt, the pre-drying conveyor belt is arranged above the drying conveyor belt, the strip cutter is arranged below the unloading end of the pre-drying conveyor belt, the loading end of the drying conveyor belt is located below the strip cutter, and the fan is arranged on the box for drying. The segmentation refers to the pre-drying stage and the drying stage. The pre-drying mechanism and the drying mechanism are integrated into one device, which reduces the equipment footprint, reduces the number of processes, is simple to operate, and has high work efficiency.

[0005] As a preferred embodiment of the present invention, the material turning mechanism includes a reduction motor, a limit switch, a lead screw perpendicular to the conveying direction of the conveyor belt, and a fixed rod vertically connected to the lead screw, and the fixed rod is provided with a plurality of material turning columns in the vertical direction. The material turning mechanism turns high-humidity sludge and other materials to further enhance the drying efficiency.

[0006] As a preferred embodiment of the present invention, the material turning mechanism is arranged in the middle of the pre-drying material turning belt; the material turning columns are arranged at equal intervals, and the material turning columns are screws. The material turning mechanism is arranged in the middle of the pre-drying material turning belt, and when the surface moisture content of materials such as high-humidity sludge is reduced after a certain degree of drying, the material with a higher moisture content at the bottom is turned to the upper part, so that the high-humidity material can be dried better and more evenly.

[0007] As a preferred embodiment of the present invention, the fixing rod is made of aluminum alloy profiles, which are easy to obtain, low in cost and have strength that meets requirements.

[0008] As a preferred embodiment of the present invention, a plurality of fans are arranged below the pre-drying conveyor belt and above the drying conveyor belt; a plurality of fans are arranged below the drying conveyor belt. Arranging a plurality of fans below the pre-drying conveyor belt increases the efficiency of pre-drying.

[0009] As a preferred embodiment of the present invention, the sectional dryer further comprises an infrared moisture sensor for detecting the moisture content of the material at the unloading end of the pre-drying conveyor belt. The infrared moisture sensor can detect whether the pre-dried material meets the strip cutting standard, and if it does not meet the strip cutting standard, the pre-drying parameters can be adjusted.

[0010] As a preferred embodiment of the present invention, the drying conveyor belt is provided with two layers, and the discharge end of the upper drying conveyor belt is provided at the receiving end of the lower drying conveyor belt. The multi-layer conveyor belt is provided for better drying to achieve the target moisture content requirement.

[0011] A segmented drying method uses the segmented drying machine described above, places the material to be dried on a pre-drying conveyor belt, starts the pre-drying conveyor belt and opens the material turning mechanism, which reciprocates to stir the material, and the pre-dried material is cut into strips by a strip cutter and then falls onto the drying conveyor belt to be dried until the material reaches a preset moisture content target.

[0012] The conveying parameters of the pre-drying conveyor belt are adjusted according to the moisture content of the material at the unloading end of the pre-drying conveyor belt detected by the infrared moisture sensor. The conveying parameters include the unloading speed, the movement speed of the pre-drying conveyor belt, the bandwidth, the movement speed of the turning mechanism, the distance between the turning mechanism and the pre-drying conveyor belt, the fan speed, the drying temperature and other parameters.

[0013] The present invention provides a segmented dryer and drying method, which can achieve drying of high-humidity materials using one device. Compared with the prior art using multiple dryers or adopting pretreatment methods such as drying and adding ingredients, it reduces the number of steps and the area required for the drying process. It is also simple to operate and has high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the sectional drying machine of the present invention.

[0016] Figure 2 It is a top view of a specific embodiment of the material turning mechanism of the present invention.

[0017] 1. Pre-drying conveyor belt; 2. Turning mechanism; 21. Speed ​​reducer motor; 22. Limiting mechanism; 23. Screw rod; 24. Fixed rod; 25. Turning column; 3. Pre-drying conveyor belt; 31. Upper drying conveyor belt; 32. Lower drying conveyor belt; 4. Strip cutter; 5. Fan. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] like Figure 1 As shown, it is a schematic diagram of the overall structure of a specific embodiment of the sectional dryer of the present invention, the sectional dryer includes a box body, a pre-drying conveyor belt 1, a turning mechanism 2, a drying conveyor belt, a strip cutter 4, and a fan 5; the turning mechanism is arranged above the pre-drying conveyor belt, the pre-drying conveyor belt 1 is arranged above the drying conveyor belt, the strip cutter 4 is arranged below the unloading end of the pre-drying conveyor belt 1, the loading end of the drying conveyor belt is located below the strip cutter, and the fan 5 is arranged on the box body for drying.

[0020] like Figure 2 The figure is a top view of a specific embodiment of the material turning mechanism of the present invention, wherein the material turning mechanism 2 comprises a reduction motor 21, a limit switch 22, a lead screw 23 perpendicular to the conveying direction of the conveyor belt, and a fixed rod 24 vertically connected to the lead screw, wherein the fixed rod 24 is provided with a plurality of material turning columns 25 in the vertical direction. The material turning mechanism 2 turns over high-humidity sludge and other materials to further enhance the drying efficiency.

[0021] In this embodiment, the material turning mechanism is arranged in the middle of the pre-drying material turning belt; the material turning columns are arranged at equal intervals, and the material turning columns are screws. The material turning mechanism is arranged in the middle of the pre-drying material turning belt, and when the surface moisture content of materials such as high-humidity sludge is reduced after a certain drying process, the materials with higher moisture content at the bottom are turned to the upper part, so that the high-humidity materials are dried better and more evenly.

[0022] Preferably, the fixing rod 24 is made of aluminum alloy profiles, which are easy to obtain and have low cost.

[0023] exist Figure 1 In the embodiment of the sectional dryer, a plurality of fans 5 are arranged below the pre-drying conveyor belt 1 and above the drying conveyor belt, and the plurality of fans 5 are arranged at equal intervals; a plurality of fans 5 are arranged below the drying conveyor belt. Arranging a plurality of fans below the pre-drying belt increases the efficiency of pre-drying.

[0024] The sectional dryer also includes an infrared moisture sensor (not shown) for detecting the moisture content of the material at the unloading end of the pre-drying conveyor belt. The infrared moisture sensor can detect whether the pre-dried material meets the slitting standard, and if it does not meet the slitting standard, the pre-drying parameters can be adjusted.

[0025] exist Figure 1 In the embodiment, the drying conveyor belt is provided with two layers, and the discharge end of the upper drying conveyor belt 31 is provided at the receiving end of the lower drying conveyor belt 32. The multi-layer conveyor belt is provided to better dry the material to achieve the target moisture content requirement.

[0026] The present invention also discloses a segmented drying method, using the segmented dryer described above, placing the material to be dried on a pre-drying conveyor belt, opening the material turning mechanism after the pre-drying conveyor belt is started, and the material turning mechanism reciprocates to stir the material, and the pre-dried material is cut into strips by a strip cutter and then falls onto the drying conveyor belt to be dried to a preset moisture content target of the material.

[0027] The conveying parameters of the pre-drying conveyor belt are adjusted according to the moisture content of the material at the unloading end of the pre-drying conveyor belt detected by the infrared moisture sensor. The conveying parameters include the unloading speed, the movement speed of the pre-drying conveyor belt, the bandwidth, the movement speed of the turning mechanism, the distance between the turning mechanism and the pre-drying conveyor belt, the fan speed, the drying temperature and other parameters.

[0028] The present invention provides a segmented dryer and drying method, which can achieve drying of high-humidity materials using one device. Compared with the prior art using multiple dryers or adopting pretreatment methods such as drying and adding ingredients, it reduces the number of steps and the area required for the drying process. It is also simple to operate and has high work efficiency.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sectional drying machine, characterized in that: It includes a box body, a pre-drying conveyor belt, a material turning mechanism, a drying conveyor belt, a strip cutter and a fan; the material turning mechanism is arranged above the pre-drying conveyor belt, the pre-drying conveyor belt is arranged above the drying conveyor belt, the strip cutter is arranged below the unloading end of the pre-drying conveyor belt, the loading end of the drying conveyor belt is located below the strip cutter, and the fan is arranged on the box body; The material turning mechanism includes a reduction motor, a limit switch, a lead screw perpendicular to the conveying direction of the conveyor belt, and a fixed rod vertically connected to the lead screw, and a plurality of material turning columns are arranged in the vertical direction of the fixed rod; The material turning mechanism is arranged in the middle of the pre-drying material turning belt; the material turning columns are arranged at equal intervals, and the material turning columns are screw rods; The fixing rod is made of aluminum alloy profile; A plurality of fans are arranged below the pre-drying conveyor belt and above the drying conveyor belt; a plurality of fans are arranged below the drying conveyor belt; The multiple fans arranged below and above the drying conveyor belt are arranged at equal intervals.

2. A sectional drying machine according to claim 1, characterized in that: The sectional dryer also includes an infrared moisture sensor for detecting the moisture content of the material at the unloading end of the pre-drying conveyor belt.

3. A sectional drying machine according to claim 1, characterized in that: The drying conveyor belt is provided with two layers, and the discharging end of the upper drying conveyor belt is arranged at the receiving end of the lower drying conveyor belt.

4. A segmented drying method, using the segmented drying machine described in any one of claims 1 to 3, placing the material to be dried on a pre-drying conveyor belt, opening the material turning mechanism after the pre-drying conveyor belt is started, and the material turning mechanism reciprocates to stir the material, and the pre-dried material is cut into strips by a strip cutter and then falls onto the drying conveyor belt to be dried to a preset moisture content target of the material.

5. A segmented drying method according to claim 4, characterized in that: The conveying parameters of the pre-drying conveyor belt are adjusted according to the moisture content of the material at the unloading end of the pre-drying conveyor belt detected by the infrared moisture sensor installed on the dryer. The conveying parameters include the unloading speed, the movement speed of the pre-drying conveyor belt, the width of the pre-drying conveyor belt, the movement speed of the turning mechanism, and the distance between the turning mechanism and the pre-drying conveyor belt.

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