Horizontal flash dryer

Abstract

The invention discloses a horizontal flash dryer, which relates to the technical field of drying, and comprises a transmission shell capable of drying materials by using hot air and carrying the materials to output, the transmission shell comprises a drying cylinder for the materials and the hot air to pass through, and an auxiliary unit is arranged in the drying cylinder. The auxiliary unit can be driven by the driving unit to detain hot air in the drying cylinder and dispersedly convey materials; the auxiliary unit comprises a power shaft rotationally arranged on the drying cylinder, a plurality of spiral pieces are fixedly connected to the power shaft and divide the drying cylinder into a plurality of drying cavities, and every two adjacent drying cavities communicate with each other through a spiral channel of the corresponding spiral piece. The problem that in the prior art, the material drying quality of drying equipment cannot meet the high drying quality requirement is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drying, in particular to a horizontal flash drying machine. BACKGROUND

[0002] In the field of drying equipment, although the traditional hot air drying type dryer is widely used in the drying treatment of various wet materials, there are still many technical defects in actual operation, which seriously restricts the drying efficiency and quality. Specifically, when the wet material rolls with the rotating drum in the drying cylinder, it is easy to form balls, which not only increases the drying difficulty, but also makes it difficult to evaporate the water in the ball, ultimately causing uneven drying of the material. At the same time, the distribution of the material curtain formed by the lifting and throwing of the lifting plate is often uneven, which limits the contact area and insufficient contact of the material with hot air, and significantly reduces the heat exchange effect. In addition, the hot air in the drying cylinder is prone to laminar flow or hollow phenomenon, further weakening the heat transfer efficiency. The above problems superimpose, resulting in low heat exchange efficiency, slow drying rate, slow water evaporation of the material, high energy consumption and other disadvantages of the traditional hot air drying type dryer. In order to ensure the basic drying capacity, the equipment needs to be designed with a larger volume, thereby occupying more space and increasing the cost of site use. Based on this, a wind-sweeping rotor dryer appears in the prior art, see reference 1.

[0003] Reference 1: Chinese patent document with patent publication number CN109813075A.

[0004] Reference 1 discloses a machine shell, i.e. a conveying shell, which is provided with a cylinder. The machine shell is provided with a feeding port and an air inlet at one end, and an air outlet at the other end. The feeding port, air inlet and air outlet are all connected with the cylinder. A rotor shaft is assembled in the cylinder, and its axis penetrates the center of the cylinder along the left-right direction. A plurality of raking plates are arranged on the shaft. The cylinder is fixed and does not move, and the rotor shaft is driven by a driving mechanism to rotate relative to the cylinder, and the material is stirred by the raking plates to enhance heat exchange.

[0005] However, the structure disclosed in reference 1 has the problem of too short residence time of the material in the cylinder. Insufficient residence time of the material will result in insufficient heat exchange with the hot air, and the water will be difficult to evaporate completely, ultimately reducing the drying quality of the material, and failing to meet the drying requirements of high-purity and low-moisture materials, and being difficult to be applied to application scenarios with high drying quality requirements. SUMMARY

[0006] The purpose of the present application is to solve the problem that the drying quality of the material in the prior art cannot meet the higher drying quality requirements, and to provide a horizontal flash drying machine.

[0007] To address the shortcomings of the aforementioned technical problems, the present invention employs the following technical solution: a transmission shell that can dry materials using hot air and carry the materials out, the transmission shell including a drying cylinder through which materials and hot air pass, and an auxiliary unit provided inside the drying cylinder, the auxiliary unit being driven by a drive unit to retain hot air inside the drying cylinder and disperse and transport materials. The auxiliary unit includes a power shaft rotatably mounted on the drying cylinder, with multiple spiral blades fixedly connected to the power shaft. The multiple spiral blades divide the drying cylinder into several drying chambers, and adjacent drying chambers are interconnected through the spiral channels of the spiral blades.

[0008] As a further optimization of the horizontal flash dryer of the present invention: the first end of the drying cylinder is provided with a feeding unit and an air inlet pipe, and the second end of the drying cylinder is provided with a discharge pipe and a slag discharge cylinder.

[0009] As a further optimization of the horizontal flash dryer of the present invention: the feeding unit includes a feeding cylinder connected to the first end of the drying cylinder, a docking cylinder is provided at the top of the feeding cylinder, and a feeding auger is rotatably connected inside the feeding cylinder, the feeding auger being driven by a first motor provided on the feeding cylinder.

[0010] As a further optimization of the horizontal flash dryer of the present invention: the drive unit includes a second motor and a belt drive structure, wherein the belt drive structure drives the second motor and the end of the power shaft.

[0011] As a further optimization of the horizontal flash dryer of the present invention: the power shaft is provided with a dispersion fence and a scraping plow on the outer peripheral surface of the drying chamber, and the outer edges of the dispersion fence and the scraping plow are tangent to the inner wall of the drying cylinder.

[0012] As a further optimization of the horizontal flash dryer of the present invention: a plug-in cylinder is fixedly connected to the outer side of the power shaft, and a bearing rod with a dispersion fence or scraper fixedly connected to the end is detachably connected to the plug-in cylinder.

[0013] As a further optimization of the horizontal flash dryer of the present invention: a dispersing fence and a scraping plow are respectively arranged on both sides of the power shaft, and multiple sets of dispersing fences and scraping plows are distributed along the length direction of the power shaft.

[0014] As a further optimization of the horizontal flash dryer of the present invention: the end of the power shaft that extends out of the drying cylinder is rotatably connected to a bearing included in the support unit, the bearing is mounted on a support frame, and both support frames are fixedly connected to the base plate.

[0015] As a further optimization of the horizontal flash dryer of the present invention: the bottom plate and the drying cylinder are connected together by multiple stabilizing plates.

[0016] As a further optimization of the horizontal flash dryer of the present invention: the outer surface of the drying cylinder is provided with multiple inspection windows, and the drying cylinder is a double-layer cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention divides the drying cylinder into several drying chambers by using spiral blades, while ensuring that each drying chamber is connected to the others via the spiral channels of the blades. The spiral blades extend the residence time of hot air within the drying cylinder and allow the hot air to carry dried material out. Furthermore, the rotating spiral blades push any material not carried by the hot air towards the outlet duct, flattening the material to further ensure drying quality. This also prevents material from remaining in a single drying chamber for too long, affecting the contact between the hot air and the material, thereby reducing the risk of decreased drying quality and efficiency due to material accumulation within the drying chamber. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the auxiliary unit structure of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 This is a schematic diagram of the BB cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the axial structure of the present invention; The diagram shows the following markings: 1. Transmission shell; 101. Air inlet pipe; 102. Feeding unit; 1021. First motor; 1022. Feeding cylinder; 1023. Connecting cylinder; 1024. Feeding auger; 103. Drying cylinder; 104. Inspection window; 105. Discharge pipe; 106. Slag discharge cylinder; 2. Auxiliary unit; 201. Power shaft; 202. Dispersion fence; 203. Scraper; 204. Spiral blade; 205. Connecting cylinder; 206. Bearing rod; 207. Spiral channel; 3. Support unit; 301. Bearing frame; 302. Base plate; 303. Stabilizing plate; 304. Bearing; 4. Drive unit; 401. Second motor; 402. Protective cover; 403. Belt drive structure. Detailed Implementation

[0019] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0020] like Figure 2 and Figure 4As shown, a horizontal flash dryer has a transmission shell 1 fixed by a support unit 3. The transmission shell 1 allows hot air and conveyed materials to pass through and be discharged by wind power. During the process of hot air passing through the transmission shell 1, an auxiliary unit 2 connected to the transmission shell 1 and driven by a drive unit 4 is also used to increase the time that the wind power and materials remain inside the transmission shell 1, so that the materials can fully contact the hot air and achieve high-quality drying of the materials.

[0021] The transfer housing 1 includes a drying cylinder 103 with a feeding unit 102 and an air inlet pipe 101 at its first end. The air inlet pipe 101 is connected to a drying hot air output device, thereby stably inputting air force into the drying cylinder 103 as the source of the dried material. The feeding unit 102 stably feeds material into the drying cylinder 103 to cooperate with the hot air for the drying process. The second end of the drying cylinder 103 is equipped with a discharge pipe 105 and a slag discharge cylinder 106. The discharge pipe 105 is located at the top of the drying cylinder 103 and can be connected to a subsequent separation device to separate the material from the airflow and obtain the dried material. The slag discharge cylinder 106 is located at the bottom of the drying cylinder 103 to collect larger particles that cannot be discharged with the hot air for subsequent centralized processing by personnel. Multiple inspection windows 104 are provided on the outer side of the drying cylinder 103 so that operators can observe the drying condition inside the drying cylinder 103. The drying cylinder 103 has a double-layer cylindrical structure to maintain good heat preservation effect and achieve high-quality material drying.

[0022] The feeding unit 102 includes a feeding cylinder 1022 that is fixedly connected to the drying cylinder 103, and a docking cylinder 1023 is fixedly connected to the top of the feeding cylinder 1022. The docking cylinder 1023 can be connected to the material conveying equipment so that the material can stably enter the feeding cylinder 1022. A feeding auger 1024 is rotatably installed inside the feeding cylinder 1022. The feeding auger 1024 is driven by a first motor 1021. The first motor 1021 is fixedly installed at the end of the feeding cylinder 1022 away from the drying cylinder 103. The feeding auger 1024 driven by the first motor 1021 can stabilize the material entering the feeding cylinder 1022 and feed the material into the drying cylinder 103 at a certain speed according to the rotation speed of the first motor 1021 and the spiral angle of the feeding auger 1024. Moreover, the rotation speed of the first motor 1021 and the spiral angle of the feeding auger 1024 can match the air volume of the hot air entering the air inlet pipe 101, thereby reducing the probability of material accumulation in the drying cylinder 103, which would lead to poor drying speed and drying quality.

[0023] like Figure 1 and Figure 3As shown, the auxiliary unit 2 includes a power shaft 201 driven by the drive unit 4. The two ends of the power shaft 201 pass through the two ends of the drying cylinder 103 and are rotatably connected to the bearings 304 included in the support unit 3. The bearings 304 are fixedly mounted on the top of the support frame 301, and the support frame 301 is fixedly connected to the upper side of the base plate 302. A plurality of stabilizing plates 303 are provided between the base plate 302 and the drying cylinder 103 so that the auxiliary unit 2 and the transmission shell 1 can be stably placed in a suitable position for use.

[0024] Multiple spiral blades 204 are uniformly fixedly connected to the power shaft 201. The outer circumferential surface of the spiral blades 204 is in contact with the inner wall of the drying cylinder 103, i.e., the outer circumferential surface of the spiral blades 204 is tangential to the inner wall of the drying cylinder 103. This allows the multiple spiral blades 204 to divide the drying cylinder 103 into multiple independent drying chambers. The spiral blades 204 are spiral in shape, thus forming narrow spiral channels, i.e., spiral channels 207, between the spiral blades 204. The spiral channels 207 of the spiral blades 204 can supply airflow within the multiple drying chambers, so that the airflow can carry the dried and small-particle material through the spiral channels 207. The spiral channels 207 of the spiral blades 204 can also accelerate the passage speed of hot air, thereby allowing the material to be stably carried by the airflow through the gaps of the spiral blades. As the power shaft 201 rotates, the spiral blades 204 can also drive and transport the material remaining inside the drying chamber toward the discharge pipe 105, and flatten the material to increase the contact area between the material and the hot air, so as to maintain the drying of the material and the speed of material output. The spiral channel 207 of the spiral blade 204 can reduce the overall airflow speed, thereby allowing the material and hot air to remain in multiple drying chambers for a longer period of time, thus maintaining a high level of material drying speed and drying quality.

[0025] A power shaft 201 is fixedly connected to multiple insertion cylinders 205 on the outer circumferential surface of multiple drying chambers. Each insertion cylinder 205 is bolted to a support rod 206. A dispersing fence 202 or a scraping plow 203 is fixedly connected to the end of the support rod 206 facing away from the power shaft 201. The dispersing fence 202 disperses potentially agglomerated materials as the power shaft 201 is driven, while the scraping plow 203 scrapes away materials that may adhere to the inner wall of the drying cylinder 103 as the power shaft 201 is driven, thereby further improving the drying success rate and drying level. The dispersing fence 202 and the scraping plow 203 are staggered along the axial direction of the power shaft 201 to maintain a high-quality material dispersing and scraping effect. One dispersing fence 202 and one scraping plow 203 are arranged as a pair on both sides of the power shaft 201, so that the dispersing fence 202 and the scraping plow 203 scrape and disperse relatively adjacently as the power shaft 201 rotates, thereby achieving a highly efficient material dispersing and scraping effect.

[0026] The dispersing fence 202 is a mesh structure formed by welding multiple steel bars. The mesh size of the dispersing fence 202 is similar to the target particle size of the material, so that the dispersing fence 202 can effectively disperse the material under the impact force driven by the power shaft 201. The scraping plow 203 has a plow-shaped structure, that is, one end of the scraping plow 203 is a pointed cone and the structure gradually expands into a bucket shape away from the pointed cone. This allows the scraping plow 203 to stably scrape off the material adhering to the inner wall of the drying cylinder 103, so that the adhering scraped material can be carried out by hot air and discharged from the discharge pipe 105.

[0027] The drive unit 4 includes a second motor 401 mounted on the base plate 302. The second motor 401 is connected to the power shaft 201 via a belt drive structure 403. The belt drive structure 403 includes a small pulley driven by the second motor 401 and a large pulley fixed to the power shaft 201 and extending through a bearing 304. The large pulley and the small pulley are connected by multiple transmission belts, thereby enabling the second motor 401 to drive the power shaft 201 to rotate stably, achieving the effects of retaining airflow, conveying materials, removing materials from the inner wall of the drying cylinder 103, and breaking up clumps of materials. The large pulley, small pulley, and transmission belt are covered by a protective cover 402 to reduce the probability of damage to the large pulley, small pulley, and transmission belt due to external influences, and to reduce the risk of injury to operators.

[0028] The specific models and working principles of the first motor 1021, the second motor 401, the large pulley, the small pulley, and the transmission belt in this embodiment should be understood as existing technology.

[0029] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A horizontal flash dryer, comprising a transfer shell (1) capable of drying materials with hot air and entraining the materials for output, the transfer shell (1) comprising a drying cylinder (103) through which materials and hot air pass, characterized in that: The drying cylinder (103) is equipped with an auxiliary unit (2), which can be driven by the driving unit (4) to retain hot air and disperse and transport materials in the drying cylinder (103); The auxiliary unit (2) includes a power shaft (201) rotatably mounted on the drying cylinder (103). Multiple spiral blades (204) are fixedly connected to the power shaft (201). The multiple spiral blades (204) divide the drying cylinder (103) into several drying chambers, and adjacent drying chambers are interconnected through the spiral channels (207) of the spiral blades (204).

2. The horizontal flash dryer as described in claim 1, characterized in that: The first end of the drying cylinder (103) is provided with a feeding unit (102) and an air inlet pipe (101), and the second end of the drying cylinder (103) is provided with a discharge pipe (105) and a slag discharge cylinder (106).

3. The horizontal flash dryer as described in claim 2, characterized in that: The feeding unit (102) includes a feeding cylinder (1022) connected to the first end of the drying cylinder (103). The top of the feeding cylinder (1022) is provided with a docking cylinder (1023), and a feeding auger (1024) is rotatably connected inside the feeding cylinder (1022). The feeding auger (1024) is driven by a first motor (1021) provided on the feeding cylinder (1022).

4. The horizontal flash dryer as described in claim 1, characterized in that: The drive unit (4) includes a second motor (401) and a belt drive structure (403), which drives the second motor (401) and the end of the power shaft (201).

5. The horizontal flash dryer as described in claim 1, characterized in that: The power shaft (201) is provided with a dispersion fence (202) and a scraper (203) on the outer peripheral surface of the drying chamber. The outer edges of the dispersion fence (202) and the scraper (203) are tangent to the inner wall of the drying cylinder (103).

6. The horizontal flash dryer as described in claim 5, characterized in that: A plug-in sleeve (205) is fixedly connected to the outer side of the power shaft (201), and a bearing rod (206) with an end fixedly connected to the plug-in sleeve (205) is detachably connected to the bearing rod (206) with the end fixedly connected to the dispersion fence (202) or the scraper (203).

7. The horizontal flash dryer as described in claim 5, characterized in that: A set of one dispersing fence (202) and one scraper (203) are respectively set on both sides of the power shaft (201), and multiple sets of dispersing fences (202) and scrapers (203) are distributed along the length of the power shaft (201).

8. The horizontal flash dryer as described in claim 1, characterized in that: The end of the power shaft (201) that extends out of the drying cylinder (103) is rotatably connected to a bearing (304) included in the support unit (3). The bearing (304) is mounted on the support frame (301), and both support frames (301) are fixedly connected to the base plate (302).

9. A horizontal flash dryer as described in claim 8, characterized in that: The base plate (302) and the drying cylinder (103) are connected together by multiple stabilizing plates (303).

10. A horizontal flash dryer as described in claim 1, characterized in that: The drying cylinder (103) has multiple inspection windows (104) on its outer side, and the drying cylinder (103) is a double-layer cylinder.

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