Dryer system with heat recovery function

Abstract

The invention relates to the technical field of drying equipment, and particularly discloses a dryer system with a heat recovery function, which comprises a drying box, an air inlet is formed in the drying box, an electric heater is arranged on the inner side wall of the drying box, a storage rack is further arranged in the drying box, a heat exchange box is arranged at the top of the drying box, and the heat exchange box is communicated with the drying box. A heat exchange pipe is arranged in the heat exchange box, one end of the heat exchange pipe is communicated with the bottom end of the water storage barrel, a water outlet pipe is arranged at the top end of the water storage barrel, the lower end of the water outlet pipe extends into the water storage barrel, the water outlet pipe is connected with the water inlet end of the water pump, and the water outlet end of the water pump is connected with the other end of the heat exchange pipe. The upper end of the outer sleeve is connected with an air outlet pipe arranged at the top of the heat exchange box through an air pipe, an air pump is arranged on the air pipe, a water outlet valve is arranged at the bottom of the water storage barrel, and a water inlet pipe is further arranged on the water storage barrel and connected with a water supply mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of drying equipment, and specifically to a dryer system with a heat recovery function. Background Art

[0002] In the field of industrial drying, traditional dryers generally have the problem of low energy utilization efficiency. During the drying process, high-temperature waste gas (containing a large amount of waste heat) is directly discharged, and the radiant heat emitted by heating components (such as electric heating tubes and infrared lamp tubes) to the surrounding environment is not effectively recovered, resulting in energy waste.

[0003] Chinese Patent CN215583104U discloses a dryer with a heat recovery function, which relates to the technical field of food processing. The dryer with a heat recovery function includes a drying box, and a water storage tank is fixedly installed on an outer wall of one side of the drying box. This utility model can quickly dry vegetables. The wind can drive the heat on the electric heating plate to pass through the filter screen from bottom to top in the drying box and evenly blow the heat on the vegetables. The hot air flows more evenly and fully, effectively improving the drying efficiency of vegetables and facilitating the subsequent processing of vegetables. While drying the vegetables, it can also suck out the hot steam in the drying box. The sucked hot steam passes through the curved condensing pipe so that the heat on the hot steam can be fully absorbed by the clear water in the water storage tank. The heated clear water can be used for washing vegetables, effectively avoiding heat waste, greatly saving energy, and helping to quickly discharge the steam in the drying box and accelerate the drying speed of vegetables.

[0004] The above technical solution achieves the effect of heat recovery and utilization by leading out the hot waste gas and using a short U-shaped pipe to exchange heat with the water in the water storage tank. However, this method has low heat utilization efficiency, and there are problems of heat loss and insufficient utilization in both the hot waste gas leading-out link and the heat exchange link. Summary of the Invention

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A dryer system with heat recovery function, including a drying box, an air inlet is arranged on the drying box, an electric heater is arranged on the inner side wall of the drying box, a storage rack is also arranged in the drying box, a heat exchange box is arranged on the top of the drying box, the heat exchange box is communicated with the drying box, a heat exchange tube is arranged in the heat exchange box, one end of the heat exchange tube is communicated with the bottom end of a water storage cylinder, a water outlet pipe is arranged at the top end of the water storage cylinder, the lower end of the water outlet pipe extends into the water storage cylinder, the water outlet pipe is connected with the water inlet end of a water pump, the water outlet end of the water pump is connected with the other end of the heat exchange tube, an outer sleeve is sleeved outside the water storage cylinder, the upper end of the outer sleeve is connected with an air outlet pipe arranged at the top of the heat exchange box through an air pipe, an air pump is arranged on the air pipe for pumping the air in the heat exchange box into the outer sleeve, a water outlet valve is arranged at the bottom of the water storage cylinder, a water inlet pipe is also arranged on the water storage cylinder, the water inlet pipe is connected with a water supply mechanism, and an exhaust port is arranged at the bottom of the outer sleeve.

[0007] Preferably, a liquid level sensor is also arranged in the water storage cylinder.

[0008] Preferably, an electric control valve is arranged on the water inlet pipe.

[0009] Preferably, the air inlet is arranged at the bottom end of the drying box, and a drain port I is arranged at the bottom of the drying box.

[0010] Preferably, a plurality of air pipes are arranged between the drying box and the heat exchange box, and the bottom diameter of the air pipes is larger than the top diameter.

[0011] Preferably, heat insulation materials are wrapped on the drying box, the heat exchange box, the outer sleeve, the air pipe and the heat exchange tube located outside the heat exchange box.

[0012] Preferably, a drain port II is arranged at the bottom side of the heat exchange box.

[0013] Preferably, a box door is arranged on the side of the drying box.

[0014] Preferably, an exhaust pipe is connected to the bottom of the exhaust port, an air inlet pipe is connected to the air inlet, the air inlet pipe is arranged obliquely upward, the exhaust pipe is arranged obliquely downward, and the air inlet pipe penetrates through the exhaust pipe, so that a heat exchange area is left between the air inlet pipe and the exhaust pipe.

[0015] Preferably, the inclined part of the exhaust pipe includes an upper half pipe and a lower half pipe, the upper half pipe and the lower half pipe are detachably connected, in this embodiment, the upper half pipe and the lower half pipe are detachably connected by bolts, and a plurality of arc-shaped baffles are arranged on the inner wall of the lower half pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, the heat exchange box and the heat exchange pipe are directly connected, and the heat of the hot air in the drying box is directly transferred to the water in the heat exchange pipe to achieve heat recovery. The recovered heat can be used in other links that require hot water, such as cleaning, preheating, etc., greatly improving the energy utilization efficiency and reducing energy consumption.

[0017] In the present invention, the air that has not been fully heat-exchanged in the heat exchange box is introduced into the outer sleeve by an air pump for secondary heat exchange, increasing the heat exchange area and time, and further improving the heat recovery effect.

[0018] The wrapping of the heat insulation material in the present invention effectively reduces the heat loss of each component of the system and improves the thermal efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a sectional view of the overall structure of the first embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the heat exchange pipe of the first embodiment of the present invention; Figure 3 It is a schematic diagram of the overall structure of the first embodiment of the present invention; Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the exhaust pipe of the second embodiment of the present invention.

[0020] In the figure: 1, drying box; 11, air inlet; 12, electric heater; 13, storage rack; 14, drain port 1; 15, ventilation pipe; 16, box door; 17, exhaust pipe; 18, intake pipe; 171, upper half pipe; 172, lower half pipe; 173, baffle; 2, heat exchange box; 21, heat exchange pipe; 22, outlet pipe; 23, drain port 2; 3, water storage cylinder; 31, outlet pipe; 32, outlet valve; 33, inlet pipe; 34, liquid level sensor; 35, electric control valve; 4, water pump; 5, outer sleeve; 51, air pipe; 52, air pump; 6, heat insulation material. DETAILED DESCRIPTION OF THE INVENTION

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0024] As Figures 1-3 shown, in this embodiment, a dryer system with a heat recovery function includes a drying box 1, a heat exchange box 2, a water storage cylinder 3, a water pump 4, and an outer sleeve 5. The drying box 1 serves as the main place for drying materials, and the heat exchange box 2 provided at its top is communicated with the drying box 1. The water storage cylinder 3 is connected to the heat exchange box 2 through a heat exchange pipe 21 to form a heat recovery circulation system. The outer sleeve 5 is sleeved outside the water storage cylinder 3 and is connected to the heat exchange box 2 through an air pipe 51 to further enhance the heat recovery effect.

[0025] In this embodiment, an air inlet 11 is provided on the drying box 1 for introducing external air. The air inlet 11 is provided at the bottom end of the drying box 1, which is conducive to forming a good air circulation path and enabling the air to fully exchange heat with the materials inside the drying box 1. An electric heater 12 is provided on the inner side wall of the drying box 1 to provide heat for the drying process. A storage rack 13 is also provided inside the drying box 1 for placing the materials to be dried. A drain port 14 is provided at the bottom of the drying box 1 to discharge liquids such as condensed water generated during the drying process. In addition, a box door 16 is provided on the side of the drying box 1 to facilitate the loading and unloading of materials.

[0026] In this embodiment, the heat exchange box 2 is located at the top of the drying box 1, and a plurality of ventilation pipes 15 are provided between the heat exchange box 2 and the drying box 1. The diameter of the bottom end of the ventilation pipe 15 is larger than that of the top end. This design helps to guide the hot air in the drying box 1 to enter the heat exchange box 2 more smoothly, improve the heat exchange efficiency, and at the same time prevent the condensed water from flowing back into the drying box. A heat exchange pipe 21 is arranged in the heat exchange box 2. One end of the heat exchange pipe 21 is communicated with the bottom end of the water storage cylinder 3, and the other end is connected to the water outlet pipe 31 of the water storage cylinder 3 through a water pump 4. An air outlet pipe 22 is arranged at the top of the heat exchange box 2 and is connected to the upper end of the outer sleeve 5 through an air pipe 51. A drain port two 23 is arranged at the bottom side of the heat exchange box 2 for discharging the condensed water generated during the heat exchange process.

[0027] In this embodiment, the water storage cylinder 3 is used to store the water heated during the heat recovery process. An outlet pipe 31 is arranged at its top end. The lower end of the outlet pipe 31 extends into the water storage cylinder 3. The outlet pipe 31 is connected to the inlet end of the water pump 4. The water pump 4 pumps out the water in the water storage cylinder 3 and sends it into the heat exchange pipe 21 to realize the circulating flow of water, so as to continuously absorb the heat in the heat exchange box 2. A water outlet valve 32 is arranged at the bottom of the water storage cylinder 3 to facilitate the discharge of the stored hot water for use. A water inlet pipe 33 is also arranged on the water storage cylinder 3. The water inlet pipe 33 is connected to the water supply mechanism for supplementing the water in the water storage cylinder 3. The water supply mechanism can be municipal water or other water supply equipment. An electric control valve 35 is arranged on the water inlet pipe 33 to control the inflow of water as needed. A liquid level sensor 34 is also arranged in the water storage cylinder 3 for monitoring the water level in the water storage cylinder 3. When the water level is too low, the water inlet pipe 33 can be controlled to replenish water through the electric control valve 35.

[0028] In this embodiment, the outer sleeve 5 is sleeved outside the water storage cylinder 3. Its upper end is connected to the air outlet pipe 22 at the top of the heat exchange box 2 through an air pipe 51. An exhaust port is arranged at the bottom of the outer sleeve 5. An air pump 52 is arranged on the air pipe 51. The air pump 52 pumps the air in the heat exchange box 2 into the outer sleeve 5, so that the air flows outside the water storage cylinder 3, further transferring the heat to the water in the water storage cylinder 3 and improving the heat recovery efficiency.

[0029] In this embodiment, in order to reduce heat loss and improve energy utilization efficiency, heat insulation materials 6 are wrapped on the drying box 1, the heat exchange box 2, the outer sleeve 5, the air pipe 51 and the heat exchange pipe 21 located outside the heat exchange box 2. Glass wool products can be selected as the heat insulation materials.

[0030] The working principle and beneficial effects of the above technical solutions are as follows: During use, place the material to be dried on the shelf 13 of the drying box 1 and close the box door 16. Connect the power supply and start the electric heater 12. Detect the temperature inside the drying box by the temperature data feedback from the temperature sensor set inside the drying box or use a handheld temperature gun. When the predetermined temperature is reached, start the water pump and air pump, and the outside air enters the drying box 1 from the air inlet 11. The electric heater 12 heats the air, and the hot air exchanges heat with the material inside the drying box 1, causing the moisture in the material to evaporate. The air containing heat enters the heat exchange box 2 through the ventilation pipe 15 and exchanges heat with the water flowing in the heat exchange pipe 21. The water pump 4 pumps out the water in the water storage cylinder 3 and sends it into the heat exchange pipe 21. The water absorbs the heat in the heat exchange box 2 and then its temperature rises, and then it flows back to the water storage cylinder 3 for storage. The air pump 52 pumps the air in the heat exchange box 2 into the outer sleeve 5, and the air flows outside the water storage cylinder 3, further transferring the heat to the water in the water storage cylinder 3. The liquid level sensor 34 monitors the water level in the water storage cylinder 3 in real time. When the water level is too low, the electric control valve 35 opens, and water is supplied to the water storage cylinder 3 through the water inlet pipe 33. The condensed water generated during the drying process is discharged from the drain port one 14 and the drain port two 23 respectively.

[0031] When hot water is needed, open the water outlet valve 32, and the hot water in the water storage cylinder 3 can be used for other technological processes. After use, cold water can be supplemented through the water inlet pipe 33 as needed to continue heat recovery and storage. Embodiment 2

[0032] As Figures 1-4 shown, on the basis of Embodiment 1, in this embodiment, a exhaust pipe 17 is connected and arranged at the bottom of the exhaust port, and an intake pipe 18 is connected and arranged at the air inlet 11. The intake pipe 18 is arranged obliquely upward, and the exhaust pipe 17 is arranged obliquely downward. The intake pipe 18 penetrates through the exhaust pipe 17, so that there is a heat exchange area between the intake pipe 18 and the exhaust pipe 17, thereby preheating the intake air by using the residual temperature of the exhaust gas, thus reducing the waste of energy. In addition, the exhaust temperature can be reduced to accelerate the liquefaction of water vapor, reducing the impact on the surrounding environmental temperature and the threat to personnel. Embodiment 3

[0033] As Figures 1-5As shown, on the basis of the second embodiment, in this embodiment, the inclined part of the exhaust pipe 17 includes an upper half pipe 171 and a lower half pipe 172. The upper half pipe 171 and the lower half pipe 172 are detachably connected. In this embodiment, the upper half pipe 171 and the lower half pipe 172 are detachably connected by bolts. The upper half pipe 171 is integrally designed with the exhaust pipe. Sealing gaskets are provided between both ends of the lower half pipe 172 and the exhaust pipe. A number of arc-shaped baffles 173 are provided on the inner wall of the lower half pipe 172 to block the condensed water, so that the condensed water can precipitate slightly between the arc-shaped baffles 173 and the lower half pipe 172, thereby blocking the impurities therein, thus purifying the condensed water. After working for a period of time, the lower half pipe 172 can be disassembled and cleaned and then reused.

[0034] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A drying system with heat recovery function, characterized in that: The invention comprises a drying box (1), wherein an air inlet (11) is provided on the drying box (1), an electric heater (12) is provided on the inner wall of the drying box (1), a storage rack (13) is further provided in the drying box (1), a heat exchange box (2) is provided on the top of the drying box (1), the heat exchange box (2) is connected to the drying box (1), a heat exchange pipe (21) is provided in the heat exchange box (2), one end of the heat exchange pipe (21) is connected to the bottom end of a water storage cylinder (3), a water outlet pipe (31) is provided at the top end of the water storage cylinder (3), the lower end of the water outlet pipe (31) extends into the water storage cylinder (3), and the water outlet pipe (31) is connected to a water pump The water inlet end of the water pump (4) is connected to the water supply end of the heat exchange tube (21), the water outlet end of the water pump (4) is connected to the other end of the heat exchange tube (21), the outer side of the water storage cylinder (3) is provided with an outer sleeve (5), the upper end of the outer sleeve (5) is connected to the air outlet pipe (22) provided at the top of the heat exchange box (2) through an air pipe (51), the air pipe (51) is provided with an air pump (52) for pumping air in the heat exchange box (2) into the outer sleeve (5), the bottom of the water storage cylinder (3) is provided with a water outlet valve (32), the water storage cylinder (3) is also provided with a water inlet pipe (33), the water inlet pipe (33) is connected to the water supply mechanism, and the bottom of the outer sleeve (5) is provided with an exhaust port.

2. A drying machine system with heat recovery function according to claim 1, characterized in that: A liquid level sensor (34) is also provided in the water storage cylinder (3).

3. A drying machine system with heat recovery function according to claim 1, characterized in that: The water inlet pipe (33) is provided with an electrically controlled valve (35).

4. A drying machine system with heat recovery function according to claim 1, characterized in that: The air inlet (11) is arranged at the bottom of the drying box (1), and a drainage outlet (14) is arranged at the bottom of the drying box (1).

5. A drying machine system with heat recovery function according to claim 1, characterized in that: A plurality of ventilation pipes (15) are arranged between the drying box (1) and the heat exchange box (2), and the diameter of the bottom end of each ventilation pipe (15) is larger than the diameter of the top end.

6. A drying machine system with heat recovery function according to claim 1, characterized in that: The drying box (1), the heat exchange box (2), the outer sleeve (5), the air pipe (51), and the heat exchange pipe (21) located outside the heat exchange box (2) are all wrapped with a heat insulation material (6).

7. A drying machine system with heat recovery function according to claim 1, characterized in that: The heat exchange box (2) is provided with a second drain outlet (23) at the bottom of the side.

8. A drying machine system with heat recovery function according to claim 1, characterized in that: The drying box (1) is provided with a box door (16) on the side.

9. A drying machine system with heat recovery function according to claim 1, characterized in that: An exhaust pipe (17) is connected to the bottom of the exhaust port, and an intake pipe (18) is connected to the intake port (11). The intake pipe (18) is arranged to be inclined upward, and the exhaust pipe (17) is arranged to be inclined downward. The intake pipe (18) passes through the exhaust pipe (17), so that a heat exchange area is left between the intake pipe (18) and the exhaust pipe (17).

10. A drying machine system with heat recovery function according to claim 9, characterized in that: The inclined portion of the exhaust pipe (17) comprises an upper half pipe (171) and a lower half pipe (172), the upper half pipe (171) and the lower half pipe (172) are detachably connected, and a plurality of baffles (173) are provided on the inner wall of the lower half pipe (172).

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