Novel dehumidifying dryer

Abstract

The utility model relates to a novel dehumidification drying machine, including drying material cylinder, fan, moisture absorption unit, drying heater, the air outlet of drying material cylinder is connected with the air inlet of drying material cylinder through fan, moisture absorption unit, drying heater in proper order, moisture absorption unit has the air inlet, regeneration exhaust port, drying exhaust port and at least two dehumidification cylinder, every dehumidification cylinder is configured with regeneration heater, every dehumidification cylinder's air inlet is linked with the air inlet of moisture absorption unit, and every dehumidification cylinder's exhaust port is linked with the regeneration exhaust port and drying exhaust port respectively through switch valve, drying exhaust port is connected with drying heater, the air inlet of moisture absorption unit is connected with the exhaust end of fan, realizes regeneration function and drying function with the gas of fan delivery, can reduce cost, save energy.

Description

Technical Field

[0001] This utility model belongs to the field of drying technology, and particularly relates to the field of dryers, specifically to a novel dehumidifying dryer. Background Technology

[0002] Currently, the conventional dehumidifying dryer's workflow is generally as follows: the dehumidifying drum absorbs moisture from the drying cycle and generates low-dew-point air to dehumidify and dry the material in the drying drum. At the same time, the regeneration fan and regeneration heating tube regenerate the dehumidifying drum that has absorbed moisture and discharge the absorbed moisture.

[0003] However, since the dehumidification cylinder regeneration cycle involves a regeneration fan drawing in ambient air, heating it, and then blowing it into the dehumidification cylinder to remove moisture, high ambient humidity can reduce the regeneration efficiency of the dehumidification cylinder. This can affect the dew point of the drying cycle and consequently the drying effect of the material. Furthermore, the regeneration effect cannot be monitored; it's impossible to determine whether moisture has been removed from the dehumidification unit. Additionally, the cooling effect after regeneration is uncontrolled. Since lower temperatures result in better moisture absorption, insufficient cooling of the dehumidification unit can compromise its regeneration performance.

[0004] In addition, dehumidifiers typically operate at a constant speed and have fixed regeneration temperatures and times. These parameters are usually set based on routine material testing. When certain materials have too little or too much moisture, over-regeneration or under-regeneration may occur. Furthermore, as the drying process continues and the moisture content of the material gradually decreases, the regeneration parameters cannot be changed in real time, leading to energy waste. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides a novel dehumidifying dryer that reduces costs and saves energy.

[0006] To achieve the above objectives, the novel dehumidifying dryer of this utility model is characterized by comprising a drying cylinder, a fan, a moisture absorption unit, and a drying heater. The exhaust port of the drying cylinder is sequentially connected to the air inlet of the drying cylinder via the fan, the moisture absorption unit, and the drying heater. The moisture absorption unit has an air inlet, a regeneration exhaust port, a drying exhaust port, and at least one dehumidifying cylinder. Each dehumidifying cylinder is equipped with a regeneration heater. The air inlet of each dehumidifying cylinder is connected to the air inlet of the moisture absorption unit. The exhaust port of each dehumidifying cylinder is connected to the regeneration exhaust port and the drying exhaust port respectively via a switching valve. The drying exhaust port is connected to the drying heater. The air inlet of the moisture absorption unit is connected to the exhaust end of the fan. The regeneration and drying functions are achieved by utilizing the gas transported by the fan.

[0007] Preferably, the regeneration exhaust port is equipped with a temperature detector and a humidity detector. The control unit is connected to the regeneration heater, the temperature detector, the humidity detector, and the switching valve, respectively. The control unit is configured to determine that regeneration is complete and control the regeneration heater to stop heating when the temperature detector detects that the regeneration exhaust temperature has reached a first set value and the humidity detector detects that the regeneration exhaust humidity has dropped to a second set value; and to determine that regeneration cooling is complete and control the switching valve to switch to perform the drying function when the temperature detector detects that the regeneration exhaust temperature has dropped to a third set value.

[0008] Preferably, the device includes a heat exchanger, wherein a first end of the heat exchanger is connected to the drying exhaust port of the moisture absorption unit, a second end of the heat exchanger is connected to the air inlet of the drying heater, a third end of the heat exchanger is connected to the exhaust port of the drying cylinder, and a fourth end of the heat exchanger is connected to the air inlet of the fan. The first end of the heat exchanger is connected to the second end, and the third end is connected to the fourth end.

[0009] Preferably, a filter and a cooler are provided between the exhaust port of the drying cylinder and the air inlet of the blower.

[0010] Preferably, the inlet end of the fan is provided with an inert gas input pipe, which is a normally closed inert gas input pipe.

[0011] Preferably, both the inlet and outlet of the drying cylinder are equipped with normally closed valves.

[0012] Preferably, the inert gas input pipe is equipped with an inert gas generator and a membrane dryer, and the inert gas input pipe is connected to compressed air.

[0013] Preferably, a temperature probe is installed between the air inlet of the drying heater and the air inlet of the drying cylinder.

[0014] This novel dehumidifying dryer uses only one fan to simultaneously achieve drying and regeneration functions, saving on equipment manufacturing costs and subsequent maintenance costs. It ensures the regeneration efficiency of the moisture absorption unit, preventing insufficient regeneration and poor drying when drying materials with high moisture content, and preventing energy waste caused by over-regeneration when drying materials with low moisture content. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the process structure of the novel dehumidifying dryer of this utility model.

[0016] Figure 2 This is a schematic diagram of the first structure of the moisture absorption unit in the novel dehumidifying dryer of this utility model.

[0017] Figure 3 This is a schematic diagram of the second structure of the moisture absorption unit in the novel dehumidifying dryer of this utility model. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figures 1 to 3 The image shows a specific embodiment of the novel dehumidifying dryer of this utility model. The novel dehumidifying dryer includes a drying cylinder 1, a fan 5, a moisture absorption unit, and a drying heater 2. The exhaust port of the drying cylinder 1 is connected to the air inlet of the drying cylinder 1 in sequence through the fan 5, the moisture absorption unit, and the drying heater 2. The moisture absorption unit has an air inlet, a regeneration exhaust port, a drying exhaust port, and three dehumidifying cylinders 4, each of which is equipped with a regeneration heater 12. Figure 3 As shown, the regeneration heater 12 is installed inside the dehumidification cylinder 4. The dehumidification cylinder can be a molecular sieve type dehumidification cylinder. The regeneration of the dehumidification cylinder 4 is achieved by heating with the regeneration heater 12.

[0020] The air inlet of each dehumidification cylinder 4 is connected to the air inlet of the moisture absorption unit. The exhaust port of each dehumidification cylinder 4 is connected to the regeneration exhaust port and the drying exhaust port respectively through the switching valve 16. The drying exhaust port is connected to the drying heater 2. The air inlet of the moisture absorption unit is connected to the exhaust end of the fan 5. The regeneration function and the drying function are realized by the gas delivered by the fan 5.

[0021] The air outlet of the drying cylinder 1, the fan 5, the air inlet of the moisture absorption unit, the drying exhaust port of the moisture absorption unit, the drying heater 2, and the air inlet of the drying cylinder 1 form a drying cycle to achieve the drying function and dry the material in the drying cylinder.

[0022] The exhaust port of the drying cylinder 1, the fan 5, the air inlet of the moisture absorption unit, and the regeneration exhaust port of the moisture absorption unit realize the regeneration function to regenerate the moisture absorption unit.

[0023] Therefore, this utility model uses only the gas delivered by the fan 5 to complete the regeneration and drying functions, which reduces the cost of subsequent equipment maintenance and inspection. Furthermore, the regeneration is carried out using low dew point air in the drying cycle, so the regeneration effect is not affected by the external environment. The switching between the regeneration and drying functions is achieved through the switching valve 16.

[0024] Furthermore, in the novel dehumidifying dryer of this utility model, the regeneration exhaust port is equipped with a temperature detector 14 and a humidity detector 13, and the control unit is connected to the regeneration heater 12, the temperature detector 14, the humidity detector 13 and the switching valve 16 respectively.

[0025] The control unit is configured to determine that regeneration is complete and control the heating of the regeneration heater 12 to stop when the temperature detector 14 detects that the regeneration exhaust temperature has reached a first set value and the humidity detector 13 detects that the regeneration exhaust humidity has dropped to a second set value. By monitoring the temperature and humidity of the regeneration exhaust port, the regeneration effect of the dehumidification cylinder 4 is effectively guaranteed, and the regeneration temperature is no longer controlled.

[0026] After regeneration is complete, the regeneration heater stops heating to allow for regeneration cooling. The control unit, based on the temperature detector 14 detecting that the regeneration exhaust temperature has dropped to the third set value, determines that regeneration cooling is complete and controls the switching valve 16 to switch to the drying function. The cooled dehumidifier cartridge switches into the drying cycle to remove moisture from the material, and then the moisture-absorbing dehumidifier cartridge switches into the regeneration cycle to remove moisture again.

[0027] The dryer of this invention monitors both the exhaust humidity during regeneration and the temperature during regeneration cooling to ensure the regeneration efficiency of the dehumidification unit. When drying materials with high moisture content, it prevents insufficient regeneration that leads to poor material drying. When drying materials with low moisture content, it also prevents over-regeneration that results in energy waste.

[0028] like Figure 1 As shown, the novel dehumidifying dryer of this utility model also includes a heat exchanger 3. The first end of the heat exchanger 3 is connected to the drying exhaust port of the moisture absorption unit, the second end of the heat exchanger 3 is connected to the air inlet of the drying heater 2, the third end of the heat exchanger 3 is connected to the air outlet of the drying cylinder 1, and the fourth end of the heat exchanger 3 is connected to the air inlet of the fan 5. The first and second ends of the heat exchanger 3 are connected in series, and the third and fourth ends are connected in series. Thus, through heat exchange between the drying inlet air and the return air, the low-temperature inlet air exchanges heat with the high-temperature return air, reducing the return air temperature while increasing the inlet air temperature, thereby achieving energy savings.

[0029] like Figure 1 As shown, a filter 7 and a cooler 6 are installed between the exhaust port of the drying cylinder 1 and the air inlet of the fan 5. A temperature probe 15 is installed between the drying heater 2 and the air inlet of the drying cylinder 1.

[0030] like Figure 1As shown, the inlet end of the fan 5 is equipped with an inert gas input pipe 8, which is a normally closed inert gas input pipe. Specifically, the inert gas input pipe 8 is equipped with an inert gas generator 9 and a membrane dryer 10, and is connected to compressed air through a filter pressure reducing valve 11. Meanwhile, both the inlet and outlet of the drying cylinder are equipped with normally closed valves. Thus, the closed-loop drying cycle design allows for the injection of inert gases, such as nitrogen, which can effectively reduce the yellowing of materials. This makes the dryer of this invention suitable for drying materials prone to yellowing or oxidation, effectively reducing yellowing or oxidation reactions in high-temperature or oxygen-rich environments.

[0031] Therefore, this invention utilizes a portion of the low dew point air in the drying cycle to regenerate the dehumidification cylinder, and then injects the compressed air into the drying cycle system after filtration. In this way, the regeneration effect of the dehumidification cylinder is not affected by the external environment, and the low dew point compressed air added to the drying cycle can better dry the materials.

[0032] This novel dehumidifying dryer uses only one fan to simultaneously achieve drying and regeneration functions, saving on equipment manufacturing costs and subsequent maintenance costs. It ensures the regeneration efficiency of the moisture absorption unit, preventing insufficient regeneration and poor drying when drying materials with high moisture content, and preventing energy waste caused by over-regeneration when drying materials with low moisture content.

[0033] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A novel dehumidifying dryer, characterized in that, The system includes a drying cylinder, a fan, a moisture absorption unit, and a drying heater. The exhaust port of the drying cylinder is connected to the air inlet of the drying cylinder in sequence through the fan, the moisture absorption unit, and the drying heater. The moisture absorption unit has an air inlet, a regeneration exhaust port, a drying exhaust port, and at least two dehumidification cylinders. Each dehumidification cylinder is equipped with a regeneration heater. The air inlet of each dehumidification cylinder is connected to the air inlet of the moisture absorption unit. The exhaust port of each dehumidification cylinder is connected to the regeneration exhaust port and the drying exhaust port respectively through a switching valve. The drying exhaust port is connected to the drying heater. The air inlet of the moisture absorption unit is connected to the exhaust end of the fan. The regeneration and drying functions are achieved by using the gas delivered by the fan.

2. The novel dehumidifying dryer according to claim 1, characterized in that, The regeneration exhaust port is equipped with a temperature detector and a humidity detector. The control unit is connected to the regeneration heater, the temperature detector, the humidity detector, and the switching valve, respectively. The control unit is configured to determine that regeneration is complete and control the heating of the regeneration heater to stop when the temperature detector detects that the regeneration exhaust temperature has reached a first set value and the humidity detector detects that the regeneration exhaust humidity has dropped to a second set value; and to determine that regeneration cooling is complete and control the switching valve to switch to perform the drying function when the temperature detector detects that the regeneration exhaust temperature has dropped to a third set value.

3. The novel dehumidifying dryer according to claim 1, characterized in that, The device includes a heat exchanger, wherein the first end of the heat exchanger is connected to the drying exhaust port of the moisture absorption unit, the second end of the heat exchanger is connected to the air inlet of the drying heater, the third end of the heat exchanger is connected to the exhaust port of the drying cylinder, and the fourth end of the heat exchanger is connected to the air inlet of the fan. The first end and the second end of the heat exchanger are connected in communication, and the third end and the fourth end are connected in communication.

4. The novel dehumidifying dryer according to claim 1, characterized in that, A filter and a cooler are installed between the exhaust port of the drying cylinder and the air inlet of the blower.

5. The novel dehumidifying dryer according to claim 1, characterized in that, The fan is equipped with an inert gas input pipe at its air inlet, and the inert gas input pipe is a normally closed inert gas input pipe.

6. The novel dehumidifying dryer according to claim 5, characterized in that, The inert gas input pipe is equipped with an inert gas generator and a membrane dryer, and the inert gas input pipe is connected to compressed air.

7. The novel dehumidifying dryer according to claim 5, characterized in that, The feed inlet and discharge outlet of the drying cylinder are both equipped with normally closed valves.

8. The novel dehumidifying dryer according to claim 1, characterized in that, A temperature probe is installed between the air inlet of the drying heater and the air inlet of the drying cylinder.

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