Spiral heater kit

Abstract

The utility model discloses a spiral heater suite, which relates to the technical field of machinery and comprises a first transport pipeline and a second transport pipeline, one ends of the first transport pipeline and the second transport pipeline on the same side are jointly and fixedly connected with an inner sleeve, and one side of the inner sleeve is provided with a hot water tank. The water inlet end and the water outlet end of the hot water tank are connected with a third conveying pipeline and a fourth conveying pipeline correspondingly. According to the utility model, hot water circularly flows among the hot water tank, the outer sleeve and the hot water tank, materials in the alcohol precipitation tank flow in the inner sleeve, the hot water and the materials exchange heat through the wall of the inner sleeve, the hot water flows from bottom to top, and the thread part is arranged on the outer wall of the inner sleeve, so that the contact area between the hot water and the materials is greatly increased, and the heat exchange efficiency is improved; the temperature of materials in the alcohol precipitation tank can be quickly stabilized at 41 DEG C, and the constant-temperature requirement of tannin production operation of acorn powder processing is met; the energy utilization efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to a spiral heater kit. Background Technology

[0002] During the tannin production process from acorn powder, the liquid in the pipeline of the alcohol precipitation tank needs to be heated and kept at a constant temperature.

[0003] However, existing spiral heater kits have some drawbacks in practical use: the design of hot water circulation and material flow in existing devices for heating alcohol precipitation tanks is not reasonable enough. Hot water and materials typically flow within relatively fixed channels, lacking an effective structure to increase the contact area between them. For example, the pipe surfaces are relatively smooth, resulting in limited heat exchange area and a slow and insufficient heat exchange process. This not only prolongs the time it takes for the material to reach a constant temperature, reducing production efficiency, but also wastes energy and increases production costs for enterprises due to the need for more heat input to maintain the temperature. Utility Model Content

[0004] The purpose of this invention is to provide a spiral heater kit to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides a spiral heater kit, including a first transport pipe and a second transport pipe. The first and second transport pipes are fixedly connected to an inner sleeve at one end on the same side. A hot water tank is provided on one side of the inner sleeve. The inlet and outlet of the hot water tank are respectively connected to a third transport pipe and a fourth transport pipe. The ends of the third and fourth transport pipes away from the hot water tank are fixedly connected to an outer sleeve. The inner sleeve is located inside the outer sleeve. The interior of the outer sleeve is connected to the interior of the hot water tank through the third and fourth transport pipes.

[0006] Furthermore, the outer wall of the inner sleeve is provided with a threaded portion, which has a threaded structure.

[0007] Furthermore, a gap is left between the outer wall of the threaded portion and the inner wall of the outer sleeve to allow hot water to flow through.

[0008] Furthermore, a centrifugal pump is installed at the end of the second transport pipeline away from the inner sleeve, and the end of the second transport pipeline away from the inner sleeve is connected to the suction port of the centrifugal pump. The discharge port of the centrifugal pump is connected to the inlet of the alcohol precipitation tank, and the end of the first transport pipeline away from the inner sleeve is connected to the outlet of the alcohol precipitation tank.

[0009] Furthermore, a pipeline pump is installed at the end of the fourth transport pipeline away from the outer casing, and the end of the fourth transport pipeline away from the outer casing is connected to the outlet end of the pipeline pump, while the inlet end of the pipeline pump is connected to the outlet end of the hot water tank.

[0010] Furthermore, the outer surface of the hot water tank is provided with an insulation layer, the thickness of which is 10 centimeters.

[0011] Furthermore, the first transport pipeline, the second transport pipeline, the inner sleeve, the third transport pipeline, the fourth transport pipeline, and the outer sleeve are all made of 304 stainless steel with a diameter of 50 cm.

[0012] Furthermore, the inner sleeve has a diameter of 5 cm, and the outer sleeve has a diameter of 30 cm.

[0013] Furthermore, the thread height of the threaded part is 3 cm, the thread pitch is 2 cm, and the material of the threaded part is 304 stainless steel.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, hot water circulates between the hot water tank, the outer sleeve, and the hot water tank, while the material in the alcohol precipitation tank flows in the inner sleeve. The two exchange heat through the inner sleeve wall. The upward flow of hot water and the threaded part on the outer wall of the inner sleeve greatly increase the contact area between the hot water and the material, improve the heat exchange efficiency, and can quickly stabilize the temperature of the material in the alcohol precipitation tank at 41 degrees Celsius, meeting the constant temperature requirements for tannin production in acorn powder processing, and further improving production efficiency.

[0016] 2. In this utility model, the pipeline pump draws hot water from the bottom of the hot water tank, transports it to the outer casing through various transport pipelines, and then returns to the hot water tank via a specific path, forming a complete circulation loop. This stable power supply ensures the continuity and stability of the hot water circulation, avoids uneven heating or temperature fluctuations caused by insufficient or unstable power, effectively guarantees the reliable operation of the spiral heater kit in the heating and heat preservation process of the alcohol precipitation tank, and improves the stability of production operations.

[0017] 3. In this utility model, the threaded part on the outer wall of the inner sleeve not only increases the heat exchange area, but also guides the flow of hot water to a certain extent, making the heat exchange more complete. At the same time, the hot water circulation system realizes the recycling of energy, reduces energy waste, and reduces energy consumption and improves energy utilization efficiency while meeting the heating and insulation requirements of the alcohol precipitation tank, thereby reducing production costs for enterprises. Attached Figure Description

[0018] Figure 1 This is a front view of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the external three-dimensional structure of the present invention;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the outer sleeve of this utility model in half-section;

[0021] Figure 4 This is a partial three-dimensional structural diagram of the outer sleeve of this utility model;

[0022] Figure 5 This is a flowchart of the automatic control system of this utility model;

[0023] Figure 6 This is a flowchart of the dual-pump coordinated regulation process of this utility model.

[0024] In the diagram: 1. First transport pipeline; 2. Second transport pipeline; 3. Inner sleeve; 4. Hot water tank; 5. Third transport pipeline; 6. Fourth transport pipeline; 7. Outer sleeve; 8. Threaded section; 9. Centrifugal pump; 10. Pipeline pump. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 This utility model provides a technical solution: a spiral heater kit, including a first transport pipe 1 and a second transport pipe 2. The first transport pipe 1 and the second transport pipe 2 are fixedly connected to an inner sleeve 3 at one end on the same side. A hot water tank 4 is provided on one side of the inner sleeve 3. The inlet and outlet of the hot water tank 4 are respectively connected to a third transport pipe 5 and a fourth transport pipe 6. The ends of the third transport pipe 5 and the fourth transport pipe 6 away from the hot water tank 4 are fixedly connected to an outer sleeve 7. The inner sleeve 3 is located inside the outer sleeve 7. The inside of the outer sleeve 7 is connected to the inside of the hot water tank 4 through the third transport pipe 5 and the fourth transport pipe 6.

[0027] In practice, pure water is heated by a boiler and then enters the hot water tank 4 for heat preservation. It is then circulated in to exchange heat with the material in the alcohol precipitation tower. During alcohol precipitation, a constant temperature is required. The temperature of the hot water in the hot water tank 4 is 80 degrees Celsius, and the temperature of the material in the alcohol precipitation tower needs to be stabilized at 41 degrees Celsius. The hot water flows from bottom to top and is circulated to the outer sleeve 7, while the material flows in the inner sleeve 3.

[0028] See Figure 4 The outer wall of the inner sleeve 3 is provided with a threaded part 8. The threaded part 8 has a threaded structure. There is a gap between the outer wall of the threaded part 8 and the inner wall of the outer sleeve 7 to allow hot water to flow. This design not only increases the heat exchange area between the hot water and the material inside the inner sleeve 3 and improves the heat exchange efficiency, but also guides the flow of hot water to a certain extent, making the heat exchange more complete.

[0029] See Figure 1 A centrifugal pump 9 is installed at the end of the second transport pipe 2 away from the inner sleeve 3. The end of the second transport pipe 2 away from the inner sleeve 3 is connected to the suction port of the centrifugal pump 9. The discharge port of the centrifugal pump 9 is connected to the inlet of the alcohol precipitation tank. The end of the first transport pipe 1 away from the inner sleeve 3 is connected to the outlet of the alcohol precipitation tank. A pipeline pump 10 is installed at the end of the fourth transport pipe 6 away from the outer sleeve 7. The end of the fourth transport pipe 6 away from the outer sleeve 7 is connected to the outlet of the pipeline pump 10. The inlet of the pipeline pump 10 is connected to the outlet of the hot water tank 4.

[0030] Centrifugal pump 9 and pipeline pump 10 are used to provide power for hot water circulation. Hot water in hot water tank 4 enters the fourth transport pipeline 6 through the pipeline pump 10 from the bottom outlet, and then flows into the outer sleeve 7. In the outer sleeve 7, it enters the third transport pipeline 5 from bottom to top and returns to hot water tank 4 to achieve circulation. The material in alcohol precipitation tank enters the inner sleeve 3 through the first transport pipeline 1. At this time, the material in the inner sleeve 3 exchanges heat with the hot water outside the inner sleeve 3, and then flows back to alcohol precipitation tank through the second transport pipeline 2.

[0031] See Figure 5 and Figure 6 The material is heated by two fluids in the inner sleeve (3) wall through indirect contact heat exchange. The material flows inside the inner sleeve (3), and the hot water flows in the gap between the outer sleeve (7) and the inner sleeve (3). The hot water flow rate is adjusted by the pipeline pump (10) and the material flow rate is adjusted by the centrifugal pump (9). By adjusting the pump speed, the two pumps work together to adjust the flow rate, cope with changes in production load, and avoid temperature fluctuations.

[0032] The effect of flow rate on temperature and material flow rate is as follows: When the centrifugal pump (9) speed decreases, the material flow rate decreases, the material flow time through the inner sleeve (3) increases, the single heat exchange time increases, the heat absorbed by the unit mass of material increases, the material temperature that is fully absorbed and flows back to the alcohol settling tank is higher than when the material flow rate is lower, and the time the material flows through the inner sleeve (3) determines the heat exchange time of the material in the thermal field.

[0033] The effect of changing the hot water flow rate: When the pump speed of the pipeline pump (10) increases, the hot water flow rate increases, the residence time of the hot water in the outer tube (7) decreases, the heat energy carried by the hot water decreases, the high temperature of the outer tube (7) area is maintained, the heat exchange temperature difference between the hot water and the material is stable, and the heat transfer capacity is enhanced. The hot water flow rate is the heat supply rate, which determines the heat source intensity.

[0034] The material temperature depends on its residence time in the heat exchange zone (controlled by the material flow rate) and the heat source intensity in the heat exchange zone (controlled by the hot water flow rate). When the material flow rate increases, the time it takes to flow through the inner sleeve (3) is shortened, and the hot water flow rate needs to be increased simultaneously to maintain the high temperature in the heat exchange zone; conversely, when the material flow rate decreases, the hot water flow rate needs to be reduced to avoid overheating. The two are adjusted by the pump speed ratio to achieve on-demand heat supply, ultimately stabilizing the material temperature in the alcohol precipitation tank at 41℃.

[0035] A PT100 temperature sensor is installed at the outlet of the alcohol precipitation tank to collect temperature data every 0.5 seconds. The temperature sensor monitors the material temperature in the alcohol precipitation tank in real time. The PLC controller runs a PID algorithm and outputs control signals. The frequency converter adjusts the motor speed of centrifugal pump 9 and pipeline pump 10.

[0036] See Figure 1 The outer surface of the hot water tank 4 is equipped with an insulation layer with a thickness of 10 cm. During the heating and insulation operation of the alcohol precipitation tank, the hot water tank 4 needs to continuously maintain the internal hot water at a high temperature. The thick insulation layer on its outer surface can effectively block the heat exchange between the hot water tank 4 and the external environment. Under normal production conditions, the external temperature is usually lower than the water temperature inside the hot water tank 4. Without the insulation layer, the hot water tank 4 will continuously lose heat to the outside, causing the boiler to need to be frequently started to replenish the lost heat and consume a lot of energy.

[0037] The first transport pipe 1, the second transport pipe 2, the inner sleeve 3, the third transport pipe 5, the fourth transport pipe 6, and the outer sleeve 7 all use 304 stainless steel pipes with a diameter of 50 cm. In the working environment of acorn powder processing to produce tannin, the pipes involved in the alcohol precipitation tank heating system will come into contact with hot water and materials with a certain acidity or alkalinity, and may contain impurities or chemicals. The 50 cm diameter 304 stainless steel pipe has good corrosion resistance. The 304 stainless steel material contains elements such as chromium and nickel, which can form a dense chromium oxide protective film on the surface of the pipe, effectively preventing external corrosive media from eroding the inside of the pipe. Compared with ordinary pipe materials, using 50 cm diameter 304 pipes can greatly reduce the risk of pipe leakage and perforation due to corrosion, reduce production interruptions and material leakage losses caused by pipe damage, and ensure the stable operation of the entire heating system.

[0038] The inner sleeve 3 has a diameter of 5 cm, and the outer sleeve 7 has a diameter of 30 cm. To improve heat exchange efficiency, the 5 cm diameter of the inner sleeve 3 and the 30 cm diameter of the outer sleeve 7 create a larger radial space. This larger space allows for a more spacious flow channel for hot water between the outer sleeve 7 and the inner sleeve 3, enabling the hot water to flow around the inner sleeve 3 at a more uniform and stable velocity. The contact area between the hot water and the outer wall of the inner sleeve 3 is relatively increased, and the hot water can fully exchange heat with the inner sleeve 3 during flow, avoiding poor hot water flow and localized overheating caused by limited space. This design eliminates issues such as uneven temperature distribution, significantly improving heat exchange efficiency and enabling rapid temperature increases of the material within the inner sleeve 3 to the target value. Regarding conveying stability, the 5cm diameter of the inner sleeve 3 fully considers the material's flow characteristics. For the material in the alcohol precipitation tank, this diameter provides a suitable flow path, preventing both excessively large diameters that lead to slow flow and blockages, and excessively small diameters that increase flow resistance and affect conveying efficiency. The material flows at a stable speed within the inner sleeve 3, ensuring the continuity and stability of the alcohol precipitation operation and improving production efficiency.

[0039] The threaded part 8 has a thread height of 3 cm and a thread pitch of 2 cm. The threaded part 8 has a thread height of 3 cm and a thread pitch of 2 cm, which further optimizes the heat exchange process. The presence of threads increases the contact area between hot water and the outer wall of the inner sleeve 3, so that the hot water is constantly disturbed by the threads during the flow process, forming turbulence. The hot water in the turbulent state can more fully transfer heat with the inner sleeve 3. Compared with the laminar flow state, the heat exchange efficiency is significantly improved. This design can ensure that the heat in the hot water is quickly and efficiently transferred to the material in the inner sleeve 3, so that the material temperature quickly reaches and stabilizes at 41 degrees Celsius, meeting the constant temperature requirements of acorn powder processing and tannin production.

[0040] The threaded part 8 is made of 304 stainless steel, ensuring the durability and reliability of the kit.

[0041] Working principle:

[0042] This utility model is a heater kit connected to an alcohol precipitation tank. During the acorn powder processing to produce tannin, the liquid in the pipeline of the alcohol precipitation tank needs to be heated and kept warm. Pure water is heated by a boiler and enters the hot water tank 4 for heat preservation. It is circulated in to exchange heat with the material in the alcohol precipitation tower. The alcohol precipitation needs to be kept at a constant temperature. The temperature of the hot water in the hot water tank 4 is 80 degrees Celsius, and the temperature of the material in the alcohol precipitation tower needs to be kept stable at 41 degrees Celsius.

[0043] Hot water in the hot water tank 4 enters the fourth transport pipe 6 through the water outlet at the bottom via the pipeline pump 10, and then flows into the outer sleeve 7. In the outer sleeve 7, it enters the third transport pipe 5 from bottom to top and returns to the hot water tank 4, thus achieving circulation. The material in the alcohol precipitation tank enters the inner sleeve 3 through the first transport pipe 1. At this time, the material in the inner sleeve 3 exchanges heat with the hot water outside the inner sleeve 3, and then flows back to the alcohol precipitation tank through the second transport pipe 2.

[0044] Centrifugal pump 9 and pipeline pump 10 are used to provide power for hot water circulation. The hot water flows from bottom to top and is circulated to the outer sleeve 7 and the inner sleeve 3. The outer wall of the inner sleeve 3 is provided with a threaded part 8 to increase the heat exchange area.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A spiral heater kit, comprising a first transport pipe (1) and a second transport pipe (2), characterized in that, The first transport pipe (1) and the second transport pipe (2) are fixedly connected to an inner sleeve (3) at one end on the same side. A hot water tank (4) is provided on one side of the inner sleeve (3). The inlet and outlet of the hot water tank (4) are respectively connected to a third transport pipe (5) and a fourth transport pipe (6). The ends of the third transport pipe (5) and the fourth transport pipe (6) away from the hot water tank (4) are fixedly connected to an outer sleeve (7). The inner sleeve (3) is located inside the outer sleeve (7). The inside of the outer sleeve (7) is connected to the inside of the hot water tank (4) through the third transport pipe (5) and the fourth transport pipe (6).

2. The spiral heater kit as claimed in claim 1, characterized in that, The inner sleeve (3) has a threaded part (8) on its outer wall, and the threaded part (8) has a threaded structure.

3. The spiral heater kit as described in claim 2, characterized in that, A gap is left between the outer wall of the threaded part (8) and the inner wall of the outer sleeve (7) to allow hot water to flow.

4. The spiral heater kit as claimed in claim 3, characterized in that, A centrifugal pump (9) is installed at one end of the second transport pipe (2) away from the inner sleeve (3). The end of the second transport pipe (2) away from the inner sleeve (3) is connected to the suction port of the centrifugal pump (9). The discharge port of the centrifugal pump (9) is connected to the inlet of the alcohol precipitation tank. The end of the first transport pipe (1) away from the inner sleeve (3) is connected to the outlet of the alcohol precipitation tank.

5. The spiral heater kit as claimed in claim 4, characterized in that, A pipeline pump (10) is provided at the end of the fourth transport pipeline (6) away from the outer casing (7). The end of the fourth transport pipeline (6) away from the outer casing (7) is connected to the outlet end of the pipeline pump (10). The inlet end of the pipeline pump (10) is connected to the outlet end of the hot water tank (4).

6. The spiral heater kit as claimed in claim 5, characterized in that, The outer surface of the hot water tank (4) is provided with an insulation layer, the thickness of which is 10 cm.

7. The spiral heater kit as claimed in claim 6, characterized in that, The first transport pipe (1), the second transport pipe (2), the inner sleeve (3), the third transport pipe (5), the fourth transport pipe (6), and the outer sleeve (7) are all made of 304 stainless steel with a diameter of 50 cm.

8. The spiral heater kit as claimed in claim 7, characterized in that, The inner sleeve (3) has a diameter of 5 cm, and the outer sleeve (7) has a diameter of 30 cm.

9. The spiral heater kit as claimed in claim 8, characterized in that, The thread height of the threaded part (8) is 3 cm and the thread pitch is 2 cm. The threaded part (8) is made of 304 stainless steel.

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