Hot air circulation drying system capable of preventing water vapor saturation

Abstract

The invention relates to the technical field of drying equipment, in particular to a steam saturation prevention hot air circulation drying system which comprises a heat pump device, a condenser of the heat pump device is installed in a hot air chamber, the hot air chamber is connected with a first fan, the first fan is connected with a drying tower through a first air conveying pipe, and the upper portion of the drying tower is connected with a heat exchanger through a second air conveying pipe. The heat exchanger is connected with an air inlet chamber through a third air conveying pipe, an evaporator and a compressor of the heat pump device are installed in the air inlet chamber, the heat exchanger is connected with a second fan through a fourth air conveying pipe, and the second fan is connected with the hot air chamber through a pipeline. According to the hot air circulation drying system capable of preventing water vapor saturation, waste heat of drying tail air is recycled through the heat exchanger, one part of heat is transferred to fresh air, the other part of heat is absorbed by the evaporator, efficient utilization of heat energy is achieved, meanwhile, the fresh air is introduced to supplement a heat source, seeds are continuously and circularly dried, efficiency is improved, and energy is saved.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to a hot air circulation drying system that is saturated with water vapor. Background Art

[0002] Seed drying is a key step in the seed processing and storage process and is extremely important. Its main purpose is to reduce the moisture content in the seeds, thereby ensuring that the quality of the seeds is not affected during storage, transportation and subsequent processing. Drying seeds with professional seed drying equipment not only helps to ensure seed quality, but also effectively improves its germination rate.

[0003] Through searching, a vertical static seed dryer with publication number CN221992360U is found, which includes a dryer body, a feed inlet is arranged at the top of the dryer, a discharge port is arranged at the bottom of the dryer, a vertical drying bin is arranged in the dryer body, a plurality of drying channels are arranged in the drying bin body, an air inlet chamber and an air outlet chamber are respectively arranged on both sides of the drying bin body, and the drying channels are connected to the air inlet chamber and the air outlet chamber. A hoist is installed outside the dryer, and the hoist is connected to the feed inlet of the dryer. The discharge port is a conical discharge port.

[0004] However, in the vertical static seed dryer with publication number CN221992360U, hot air is input into the drying chamber through the air inlet duct to dry the seeds and then discharged from the air outlet duct. The discharged tail air still has a certain amount of heat, and the heat of the tail air is not recycled, resulting in a waste of heat energy and an increase in processing costs. Summary of the invention

[0005] The invention discloses a hot air circulation drying system that is saturated with water vapor, aiming to solve the problem in the prior art that the heat of tail wind in the existing drying equipment is not recycled, resulting in waste of heat energy and increased processing costs.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A hot air circulation drying system for preventing water vapor saturation comprises a heat pump device, a condenser of the heat pump device is installed in a hot air chamber, the hot air chamber is connected to a first fan, the first fan is connected to a drying tower through a first air duct, the upper part of the drying tower is connected to a heat exchanger through a second air duct, the heat exchanger is connected to an air inlet chamber through a third air duct, an evaporator and a compressor of the heat pump device are installed in the air inlet chamber, the heat exchanger is connected to a second fan through a fourth air duct, and the second fan is connected to the hot air chamber through a pipeline.

[0008] Furthermore, the air inlet chamber is provided with an air inlet.

[0009] Furthermore, the heat exchanger is provided with a first input port, a second input port, a first output port, and a second output port, the first input port is connected to the second air supply pipe, and the first output port is connected to the third air supply pipe.

[0010] Furthermore, the second output port is connected to a fourth air supply pipe.

[0011] Compared with the prior art, the hot air circulation drying system for preventing water vapor saturation proposed by the present invention has the following improvements and advantages:

[0012] 1. A hot air circulation drying system that is anti-water vapor saturation proposed in the present invention can exchange part of the heat in the drying tail air discharged from the drying tower into the fresh air sucked in by the second input port through a heat exchanger, so that the new air that has obtained heat is re-entered into the hot air chamber through the suction of the first fan, and is re-delivered by the second fan into the drying tower to dry the seeds under the heating of the hot air chamber condenser. At the same time, another part of the heat of the drying tail air is output from the first output port through the third air duct into the air inlet chamber and is absorbed by the evaporator, and then the heat absorbed by the evaporator is released by the condenser through the heat pump device. Therefore, the system maximizes the recycling of the waste heat of the drying tail air and avoids heat waste.

[0013] 2. The present invention proposes a hot air circulation drying system that is anti-water vapor saturation. Fresh air is introduced through the second input port and the air inlet of the heat exchanger to continuously supplement the heat source for the system. The seeds in the drying tower are dried by continuous circulation of the supplemented heat source and the waste heat of the drying tail wind, thereby improving the drying efficiency.

[0014] 3. The present invention proposes a hot air circulation drying system that is saturated with water vapor. By setting a heat exchanger, it can not only dehumidify the drying tail air, but also allow part of the heat in the drying tail air to enter the fresh air sucked in by the second input port without bringing water vapor into the fresh air. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the working process of a hot air circulation drying system for preventing water vapor saturation proposed by the present invention.

[0016] In the figure: 1, condenser; 2, hot air chamber; 3, first fan; 4, first air duct; 5, drying tower; 6, second air duct; 7, heat exchanger; 701, first input port; 702, second input port; 703, first output port; 704, second output port; 8, third air duct; 9, air inlet chamber; 10, evaporator; 11, compressor; 12, fourth air duct; 13, second fan; DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Reference Figure 1 A hot air circulation drying system for preventing water vapor saturation includes a heat pump device, a condenser 1 of the heat pump device is installed in a hot air chamber, the hot air chamber 2 is connected to a first fan 3, the first fan 3 is connected to a drying tower 5 through a first air duct 4, the upper part of the drying tower 5 is connected to a heat exchanger 7 through a second air duct 6, the heat exchanger 7 is connected to an air inlet chamber 9 through a third air duct 8, an evaporator 10 and a compressor 11 of the heat pump device are installed in the air inlet chamber 9, the heat exchanger 7 is connected to a second fan 13 through a fourth air duct 12, and the second fan 13 is connected to the hot air chamber 2 through a pipeline.

[0019] It should be noted that: in order to maximize the use of the heat of the dried tail air discharged from the second air duct 6, the heat exchanger 7 uses a plate heat exchanger with higher heat exchange efficiency. The heat exchanger 7 can ensure that the dried tail air entering the first input port 701 of the heat exchanger 7 can exchange heat energy with the fresh air from the second input port 702 of the heat exchanger 7. At the same time, through the heat exchanger 4, the water vapor in the tail air will condense into liquid water when flowing through the cooled heat exchanger surface, thereby achieving effective dehumidification.

[0020] The air inlet 14 is provided in the air inlet chamber 9. In the air inlet chamber 9, a special air inlet 14 is provided to guide the external air to flow into the air inlet chamber 9. This design is intended to provide additional heat energy for the evaporator 10 in the air inlet chamber, effectively solving the problem of insufficient heat energy of the drying tail air delivered to the air inlet chamber 9 by the third air delivery pipe 8, thereby ensuring the continuity and efficiency of the drying process.

[0021] The heat exchanger 7 is provided with a first input port 701 , a second input port 702 , a first output port 703 , and a second output port 704 . The first input port 701 is connected to the second air supply pipe 6 , and the first output port 703 is connected to the third air supply pipe 8 .

[0022] The second output port 704 is connected to the fourth air supply pipe 12 .

[0023] Working principle: First, the control device is started to turn on the heat pump device, and the compressor 11 works. In the initial stage, the evaporator 10 first absorbs heat from the fresh air introduced by the air inlet 14, and the heat is transferred to the gaseous refrigerant in the heat pump device. The refrigerant circulates in the heat pump device. When flowing through the condenser 1, the refrigerant will condense into liquid and release the absorbed heat into the hot air chamber 2. Next, the heat in the hot air chamber 2 is transported through the first fan 3 and enters the drying tower 2 through the first air duct 4 to dry the seeds. The drying tail wind containing residual heat after drying will be discharged through the second air duct 6, and then flow through the heat exchanger 7, and heat is exchanged with the fresh air entering from the second input port 702 in the heat exchanger 7. The fresh air with the increased temperature after heat exchange is then pumped into the hot air chamber 2 from the fourth air duct 12 by the second fan 13 and continues to be heated by the condenser 1. At the same time, the drying tail air output from the second output port 704 of the heat exchanger 7 enters the air inlet chamber 6 through the third air duct 8, and is mixed with the fresh air entering from the air inlet 14 to form mixed air. The heat carried by the mixed air is again absorbed by the refrigerant in the evaporator 10, and then released to the hot air chamber 2 through the condenser 1 circulated by the heat pump device. The released heat is mixed with the heat in the heated fresh air previously pumped by the second fan 13, and then is re-sent into the drying tower 2 by the first fan 3, so as to further dry the seeds and recycle the heat, thereby improving the drying efficiency and helping to save energy.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hot air circulation drying system to prevent water vapor saturation, comprising a heat pump device, characterized in that: The condenser (1) of the heat pump device is installed in a hot air chamber (2); the hot air chamber (2) is connected to a first fan (3); the first fan (3) is connected to a drying tower (5) via a first air supply pipe (4); the upper part of the drying tower (5) is connected to a heat exchanger (7) via a second air supply pipe (6); the heat exchanger (7) is connected to an air inlet chamber (9) via a third air supply pipe (8); an evaporator (10) and a compressor (11) of the heat pump device are installed in the air inlet chamber (9); the heat exchanger (7) is connected to a second fan (13) via a fourth air supply pipe (12); the second fan (13) is connected to the hot air chamber (2) via a pipeline.

2. A hot air circulation drying system for preventing water vapor saturation according to claim 1, characterized in that: The air inlet chamber (9) is provided with an air inlet (14).

3. A hot air circulation drying system for preventing water vapor saturation according to claim 1, characterized in that: The heat exchanger (7) is provided with a first input port (701), a second input port (702), a first output port (703), and a second output port (704); the first input port (701) is connected to the second air supply pipe (6), and the first output port (703) is connected to the third air supply pipe (8).

4. A hot air circulation drying system for preventing water vapor saturation according to claim 3, characterized in that: The second output port (704) is connected to a fourth air supply pipe (12).

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