A heat transfer oil drying device

Abstract

This utility model belongs to the technical field of drying equipment, specifically relating to a heat transfer oil drying device, comprising: a drying cylinder, wherein multiple drying cylinders are provided, each drying cylinder having a feed hopper at one top end and a discharge hopper at the other bottom end; a stirring assembly, wherein multiple stirring assemblies are provided and rotatably disposed within each drying cylinder; a hot oil circulation assembly, wherein the hot oil circulation assembly is disposed between the bottoms of each drying cylinder; and a hot air input pipe, wherein the hot air input pipe is disposed at one top end of the uppermost drying cylinder and close to the feed hopper. This invention addresses the problem that in traditional drum dryers, the high-temperature drying medium is often heated by electric heating elements / gas burners, resulting in high energy consumption and insufficient energy efficiency. Furthermore, the temperature of the high-temperature drying medium inside the drum is difficult to control during the drying process, leading to the possibility of explosive combustion of the material inside the drum.

Description

Technical Field

[0001] This utility model belongs to the technical field of drying devices, specifically relating to a heat transfer oil drying device. Background Technology

[0002] Material drying is a crucial step in industrial production, agricultural processing, and even environmental protection. Its core objective is to remove excess moisture from materials to meet specific requirements for subsequent processing, storage, transportation, use, or disposal. Currently, rotary drum dryers are commonly used for material drying. A rotary drum dryer mainly consists of a rotating body, lifting plates, a transmission device, a support device, and sealing rings. The rotating body is a drum slightly inclined to the horizontal, and the inner wall of the drum is equipped with lifting plates.

[0003] When wet material continuously enters the slowly rotating drum from one end, inside the drum, the lifting plates continuously scoop up and scatter the material, forming a uniform material curtain. The high-temperature drying medium (hot air or hot flue gas) passes through the drum at a certain speed and direction (co-current or counter-current), and has sufficient heat exchange (heat conduction and convection) and mass exchange (moisture evaporation and diffusion) with the falling wet material particles. The material absorbs heat, and its internal moisture migrates to the surface and evaporates. The water vapor generated by evaporation is quickly carried away and discharged by the flowing drying medium, and finally the dried material is discharged from the other end of the drum.

[0004] However, in traditional drum dryers, the high-temperature drying medium is often heated by electric heating elements / gas burners (natural gas, liquefied gas) during use. This process consumes a lot of energy and is not energy-efficient. Furthermore, the temperature of the high-temperature drying medium inside the drum is not easy to control during the drying process, which can easily lead to overheating and explosion of the material inside the drum. Utility Model Content

[0005] Based on the problems mentioned in the background technology above, this utility model provides a heat transfer oil drying device to solve the problem that in the traditional drum dryer, the high-temperature drying medium is often heated by electric heating elements / gas burners (natural gas, liquefied gas), which consumes a lot of energy and is not energy-efficient. In addition, the temperature of the high-temperature drying medium in the drum is not easy to control during the drying process, which leads to the phenomenon of explosive heating and combustion of the material in the drum.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A heat transfer oil drying device, comprising:

[0008] The drying cylinder is provided in multiple ways and is arranged in an array at intervals between the upper and lower parts. Each drying cylinder has a feed hopper at the top of one end and a discharge hopper at the bottom of the other end. The discharge hopper on the upper drying cylinder is connected to the feed hopper on the drying cylinder below it.

[0009] A stirring assembly, wherein multiple stirring assemblies are provided and are rotatably disposed within each of the drying cylinders;

[0010] A hot oil circulation assembly is disposed between the bottoms of each of the drying cylinders;

[0011] A hot air inlet pipe is located at the top of one end of the uppermost drying cylinder and near the feed hopper.

[0012] Based on the above technical solution, the present invention has made the following improvements:

[0013] Furthermore, the agitation assembly includes an agitator rod, which is rotatably disposed inside the drying cylinder. One end of the agitator rod extends through to the outside of the drying cylinder and is connected to an external motor. The agitator rod body is provided with propeller blades.

[0014] Furthermore, the hot oil circulation assembly includes a heat-conducting oil jacket, an oil inlet pipe, an oil outlet pipe, and an oil delivery pipe. Each drying cylinder has a heat-conducting oil jacket at its bottom. Each heat-conducting oil jacket has an oil inlet pipe at one end and an oil outlet pipe at the other end. The oil inlet pipe on the heat-conducting oil jacket in the upper drying cylinder is connected to the oil outlet pipe on the heat-conducting oil jacket in the lower drying cylinder through the oil delivery pipe.

[0015] Furthermore, each of the drying cylinders has an observation window on the upper half of the cylinder wall, and the observation window is equipped with a viewing panel.

[0016] Furthermore, it also includes a dust removal pipe assembly, which includes a suction pipe. The suction pipe is vertically arranged in the middle of the back of each drying cylinder, and the suction pipe is connected to the upper part of each drying cylinder through a suction pipe.

[0017] The beneficial effects of this utility model are:

[0018] 1. By setting up various drying cylinders and agitating components, and connecting the discharge hopper on the upper drying cylinder with the feed hopper on the lower drying cylinder, the drying cylinders are connected and assembled together. In use, wet material is fed into the feed hopper on the uppermost drying cylinder. Under the rotation of each agitating component, the material in the upper drying cylinder is discharged from the discharge hopper into the feed hopper on the lower drying cylinder and enters the next drying cylinder. Thus, the material is sequentially conveyed from the uppermost drying cylinder to the lowermost drying cylinder. Under the rotation of each agitating component, not only is the material in the drying cylinder agitated, but it is also scattered.

[0019] 2. Through the combination of the set hot oil circulation component and hot air input pipe, during use, the heat transfer oil in the heat transfer oil furnace is sent to the inlet of the hot oil circulation component and then discharged from the outlet of the hot oil circulation component. During the process of the heat transfer oil entering from the inlet and exiting from the outlet of the hot oil circulation component, the heat transfer oil can heat the bottom area of ​​each drying cylinder, causing the heat in the bottom area of ​​the drying cylinder to radiate into the drying cylinder, thereby raising the temperature inside the drying cylinder; at the same time, the hot exhaust pipe on the heat transfer oil furnace is connected to the hot air input pipe, so that the hot air in the heat transfer oil furnace is input through the hot air. The material is fed into the uppermost drying cylinder through a pipe, and then conveyed to the lower drying cylinder along with the material through the corresponding discharge hopper and feed hopper to further increase the temperature inside the drying cylinder, thus drying the material scattered inside. The drying process utilizes the thermal radiation of the thermal oil and the convection exchange between the hot air in the thermal oil furnace and the material. Since the temperature of the thermal oil and the hot air in the thermal oil furnace are both controllable, the material's critical combustion point will not be exceeded during the drying process, preventing overheating and explosion, making it safer and more reliable.

[0020] Furthermore, the drying medium used throughout the drying process is mainly the heat transfer oil in the external heat transfer oil furnace and the hot air inside the furnace. This allows for full utilization of the heat transfer oil temperature and hot flue gas in the external heat transfer oil furnace, achieving heat energy recovery and utilization. There is no need to use additional electric heating elements / gas burners, making it more energy-efficient and environmentally friendly.

[0021] 3. By arranging the drying cylinders in an array at intervals along the top and bottom, the entire device is extended into three-dimensional space, thus not occupying too much ground space.

[0022] 4. As the material inside the drying drum gradually dries, dust will be generated through the dust removal pipe assembly. At this time, the dust can be removed from the drying drum to avoid secondary contamination of the material inside the drying drum. Attached Figure Description

[0023] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0024] Figure 1 This is a front view of the thermal oil drying device of this utility model;

[0025] Figure 2 This is a rear structural view of a heat transfer oil drying device according to the present invention;

[0026] Figure 3 This is a plan view of a heat transfer oil drying device according to the present invention;

[0027] Figure 4 This is a cross-sectional view of the drying cylinder in a heat transfer oil drying device according to the present invention. Figure 1 ;

[0028] Figure 5 This is a cross-sectional view of the drying cylinder in a heat transfer oil drying device according to the present invention. Figure 2 .

[0029] The attached diagram is labeled as follows:

[0030] 101. Drying drum; 102. Observation window; 103. Feed hopper; 104. Discharge hopper; 201. Stirring rod; 202. Propeller blade; 301. Heat transfer oil jacket; 302. Oil inlet pipe head; 303. Oil outlet pipe head; 304. Oil delivery pipe; 401. Hot air input pipe; 501. Dust suction pipe; 502. Suction pipe. Detailed Implementation

[0031] like Figures 1-5 As shown, a heat transfer oil drying device includes:

[0032] A drying cylinder 101 is provided, and multiple drying cylinders 101 are arranged in an array at intervals along the top and bottom. Each drying cylinder 101 has a feed hopper 103 at the top of one end and a discharge hopper 104 at the bottom of the other end. The discharge hopper 104 on the upper drying cylinder 101 is connected to the feed hopper 103 on the drying cylinder 101 below it, thereby connecting and assembling the drying cylinders 101 together. The feed hopper 103 on the top drying cylinder 101 is used to feed wet materials, and the discharge hopper 104 on the bottom drying cylinder 101 is used to finally discharge the dried materials.

[0033] Furthermore, by arranging each drying cylinder 101 in a vertically spaced array, the entire device is extended into three-dimensional space, thus avoiding the need for excessive floor space as traditional drum dryers.

[0034] See Figures 3 to 5The agitation assembly includes multiple agitation components, each rotatably disposed within a drying cylinder 101. Each agitation assembly includes an agitation rod 201, which is rotatably disposed within the drying cylinder 101. One end of the agitation rod 201 extends through to the outside of the drying cylinder 101 and is connected to an external motor. A propeller blade 202 is provided on the rod body of the agitation rod 201. The corresponding agitation rod 201 can be driven to rotate by an external motor. During the rotation of the agitation rod 201, the propeller blade 202 can agitate and scatter the material in the drying cylinder 101, and at the same time, agitate and discharge the material into the discharge hopper 104.

[0035] In use, wet material is fed into the feed hopper 103 on the top drying cylinder 101. Under the rotation of each agitator 201, the propeller blades 202 on the corresponding agitator 201 agitate and scatter the material in the corresponding drying cylinder 101 and convey it to the discharge hopper 104. This causes the material in the upper drying cylinder 101 to be discharged through the discharge hopper 104 into the feed hopper 103 on the lower drying cylinder 101, ultimately allowing the material to be sequentially conveyed from the top drying cylinder 101 to the bottom drying cylinder 101. Furthermore, due to the following... The material moisture content varies in each drying cylinder 101 from top to bottom, meaning the material in the upper drying cylinder 101 has more moisture. Therefore, the rotation speed of the stirring rod 201 in the upper drying cylinder 101 is set lower than that in the drying cylinder 101 below it. This allows the material in the upper drying cylinder 101 to enter the lower drying cylinder 101 more slowly, thereby extending the residence time of the material in the corresponding drying cylinder 101 and improving the drying effect. At the same time, the use of graded speed stirring and conveying makes it less likely to cause material blockage.

[0036] See Figure 1 A hot oil circulation assembly is installed between the bottoms of each drying cylinder 101. The hot oil circulation assembly includes a heat-conducting oil jacket 301, an oil inlet pipe 302, an oil outlet pipe 303, and an oil delivery pipe 304. Each drying cylinder 101 has a heat-conducting oil jacket 301 at its bottom. One end of each heat-conducting oil jacket 301 has an oil inlet pipe 302, and the other end has an oil outlet pipe 303. The oil inlet pipe 302 on the heat-conducting oil jacket 301 in the upper drying cylinder 101... The oil outlet 303 on the heat transfer oil jacket 301 located in the next drying cylinder 101 is connected to the oil outlet pipe 304, thereby connecting the heat transfer oil jackets 301 on each drying cylinder 101 in sequence; wherein the oil inlet pipe 302 in the heat transfer oil jacket 301 on the lowest drying cylinder 101 is connected to the oil outlet pipe of the external heat transfer oil furnace, and the oil outlet pipe 303 in the heat transfer oil jacket 301 on the uppermost drying cylinder 101 is connected to the oil inlet pipe of the external heat transfer oil furnace;

[0037] The heat transfer oil is heated at a constant temperature using an external heat transfer oil heater. The heated oil then enters through the inlet pipe 302 in the heat transfer oil jacket 301 of the lowest drying cylinder 101, thus entering the jacket. The oil then exits through the outlet pipe 303 into the delivery pipe 304, which then flows into the inlet pipe 302 in the heat transfer oil jacket 301 of the next drying cylinder 101, and so on. Finally, the heat transfer oil sequentially enters the heat transfer oil jacket 301 of each drying cylinder 101. The heat transfer oil is discharged from the oil outlet 303 in the heat transfer oil jacket 301 on the uppermost drying cylinder 101 back to the external heat transfer oil furnace for constant temperature heating. After heating, it enters the oil inlet 302 in the heat transfer oil jacket 301 on the lowermost drying cylinder 101 to achieve heat transfer oil circulation and heating utilization. When the heat transfer oil enters the heat transfer oil jacket 301 on each drying cylinder 101, the heat transfer oil in each heat transfer oil jacket 301 can heat the bottom area of ​​each drying cylinder 101, causing the heat in the bottom area of ​​the drying cylinder 101 to radiate into the drying cylinder 101, thereby increasing the temperature inside each drying cylinder 101.

[0038] Hot air inlet pipe 401 is located at the top of one end of the uppermost drying cylinder 101 and close to the feed hopper 103. In use, the hot exhaust pipe of the thermal oil furnace is connected to the hot air inlet pipe 401, so that the hot flue gas in the thermal oil furnace is sent into the uppermost drying cylinder 101 through the hot air inlet pipe 401, and then conveyed to the lower drying cylinder 101 along with the material through the corresponding discharge hopper 104 and feed hopper 103 to further supplement and increase the temperature inside the drying cylinder 101.

[0039] When the temperature inside the drying drum 101 is increased by the heat radiation of the heat transfer oil in the heat transfer oil jacket 301 and the combined effect of the hot flue gas, the material inside the drying drum 101 is stirred and scattered by the propeller blades 202. After the material absorbs heat through the heat radiation of the heat transfer oil and the convection exchange of the hot flue gas introduced in the heat transfer oil furnace, the material absorbs heat, causing the internal moisture to migrate to the surface and evaporate to complete the drying operation.

[0040] This device uses the thermal radiation of thermal oil and the convection exchange between the hot flue gas in the thermal oil furnace and the material to dry the material. Since the temperature of the thermal oil in the thermal oil furnace and the temperature of the hot flue gas in the thermal oil furnace can be controlled by a temperature controller, and the oil pressure in the thermal oil furnace can be controlled by a pressure controller, the material will not exceed the critical point of combustion during the drying process, and there will be no phenomenon of overheating and explosion, making it safer and more reliable.

[0041] Furthermore, throughout the drying process, the drying medium mainly consists of the heat transfer oil temperature in the external heat transfer oil furnace and the hot flue gas inside the furnace. This fully utilizes the heat transfer oil temperature and hot flue gas in the external heat transfer oil furnace to achieve heat energy recovery and utilization. There is no need to use additional electric heating elements / gas burners, making it more energy-efficient and environmentally friendly.

[0042] See Figure 1 Each drying cylinder 101 has an observation window 102 on the upper half of the cylinder wall, and a viewing plate is provided on the observation window 102. The observation window 102 can facilitate observation of the situation inside the drying cylinder 101.

[0043] See Figure 2 It also includes a dust removal pipe assembly, which includes a suction pipe 501. The suction pipe 501 is vertically installed in the middle of the back of each drying cylinder 101. The suction pipe 501 is connected to the upper part of each drying cylinder 101 through a suction pipe 502. The pipe opening where the suction pipe 502 meets the drying cylinder 101 is equipped with an interception net, and the mesh size of the interception net is larger than the size of the material, so as to intercept the material. The suction pipe 501 is connected to the pipe opening of an external industrial vacuum cleaner. During the gradual drying process of the material in the drying cylinder 101, some dust will fall off the gradually drying material. At this time, the dust in the drying cylinder 101 can be removed by an external industrial vacuum cleaner through the suction pipe 501 and the suction pipe 502 to avoid secondary contamination of the material in the drying cylinder 101.

[0044] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A heat conducting oil drying device, characterized by: include: A drying cylinder (101) is provided in multiple ways and is arranged in an array at intervals between the upper and lower parts. Each drying cylinder (101) has a feed hopper (103) at the top of one end and a discharge hopper (104) at the bottom of the other end. The discharge hopper (104) on the upper drying cylinder (101) is connected to the feed hopper (103) on the drying cylinder (101) below it. A stirring assembly, wherein multiple stirring assemblies are provided and are rotatably disposed within each of the drying cylinders (101); A hot oil circulation assembly is disposed between the bottoms of each of the drying cylinders (101); Hot air inlet pipe (401) is located at the top of one end of the uppermost drying cylinder (101) and close to the feed hopper (103).

2. The hot oil drying device according to claim 1, characterized in that: The stirring assembly includes a stirring rod (201), which is rotatably disposed inside the drying cylinder (101). One end of the stirring rod (201) extends through to the outside of the end of the drying cylinder (101) and is connected to an external motor. A propeller blade (202) is provided on the rod body of the stirring rod (201).

3. The hot oil drying device according to claim 1, characterized in that: The hot oil circulation assembly includes a heat transfer oil jacket (301), an oil inlet pipe (302), an oil outlet pipe (303), and an oil delivery pipe (304). Each drying cylinder (101) has a heat transfer oil jacket (301) at its bottom. Each heat transfer oil jacket (301) has an oil inlet pipe (302) at one end and an oil outlet pipe (303) at the other end. The oil inlet pipe (302) on the heat transfer oil jacket (301) in the upper drying cylinder (101) is connected to the oil outlet pipe (303) on the heat transfer oil jacket (301) in the lower drying cylinder (101) through the oil delivery pipe (304).

4. The hot oil drying device according to claim 1, characterized in that: Each of the drying cylinders (101) has an observation window (102) on the upper half of the cylinder wall, and a viewing plate is provided on the observation window (102).

5. The hot oil drying device according to claim 1, characterized in that: It also includes a dust removal pipe assembly, which includes a suction pipe (501). The suction pipe (501) is vertically arranged in the middle of the back of each drying cylinder (101). The suction pipe (501) is connected to the upper half of each drying cylinder (101) through a suction pipe (502).

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