Energy-saving hot air dryer
By incorporating a circulation loop and filtration system into the hot air dryer, the problems of high exhaust temperature and dust pollution are solved, achieving energy-saving and environmentally friendly drying results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-13
AI Technical Summary
Existing hot air dryers have problems such as high exhaust temperature leading to energy waste and dust pollution.
By setting up a circulation loop of drying cylinder, drying heating tube and drying fan in the dryer, and using exhaust filter and compressed air input pipeline, the heat of drying exhaust is recovered and dust is filtered, forming a closed loop system, which increases the air temperature at the inlet of heating tube, reduces the working time of heating tube and dust emission.
It enables heat recovery and utilization, reduces energy consumption and dust pollution, and improves drying performance.
Smart Images
Figure CN223992442U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of drying technology, specifically relating to an energy-saving hot air dryer. Background Technology
[0002] Hot air dryers can be used to dry plastic granules. The typical process involves drawing in ambient air through a fan, heating it via heating elements, and then blowing it into the drying cylinder to dry the plastic granules. Finally, the hot air is directly discharged into the factory. This process wastes heat, and the dust in the exhaust also pollutes the environment. Therefore, the existing hot air dryer technology has the following drawbacks:
[0003] 1) The high temperature of the exhaust gas from the dryer means that the heat energy cannot be recovered and utilized, resulting in energy waste.
[0004] 2) Dust from the drying exhaust is directly emitted into the factory, causing environmental pollution.
[0005] 3) The drying performance of the dryer is average. Utility Model Content
[0006] In view of the above-mentioned problems in the prior art, this utility model provides a high-performance, low-energy-consumption energy-saving hot air dryer.
[0007] To solve the above-mentioned technical problems, this utility model provides an energy-saving hot air dryer, the main feature of which is that the dryer includes a drying cylinder, a drying heating tube, and a drying fan. The exhaust port of the drying cylinder is connected to the air inlet of the drying fan through an exhaust filter. The air outlet of the drying fan is connected to the air inlet of the drying heating tube. The air outlet of the drying heating tube is connected to the air inlet of the drying cylinder. The air inlet of the drying heating tube is connected to a compressed air input pipeline.
[0008] Preferably, a pressure relief valve is provided between the exhaust port of the drying cylinder and the exhaust filter.
[0009] Preferably, the compressed air input line is equipped with an air dehumidifier and at least one control valve.
[0010] Preferably, a regulating valve is provided between the exhaust filter and the air inlet of the drying fan.
[0011] Preferably, the exhaust filter is located near the air inlet of the drying fan.
[0012] This utility model of an energy-saving hot air dryer recovers and utilizes the heat from the drying exhaust, increases the inlet air temperature of the drying heating tube, reduces the working time of the heating tube, saves energy, reduces the heat from the exhaust to the environment, avoids pollution of the factory by the drying exhaust, and improves drying performance. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the energy-saving hot air dryer of this utility model. Detailed Implementation
[0014] To make the technical problem solved by this utility model clearer, the present utility model is further described below with reference to embodiments and accompanying drawings. The specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model.
[0015] like Figure 1 The image shows an embodiment of the energy-saving hot air dryer of this utility model. The dryer includes a drying cylinder 1, a drying heating tube 4, and a drying fan 3. The exhaust port of the drying cylinder 1 is connected to the air inlet of the drying fan 3 via an exhaust filter 2. The air outlet of the drying fan 3 is connected to the air inlet of the drying heating tube 4, and the air outlet of the drying heating tube 4 is connected to the air inlet of the drying cylinder 1.
[0016] Based on this utility model, the energy-saving hot air dryer uses a drying fan as a power source to form a drying circuit. The drying air in the drying circuit passes through the following paths in sequence: drying cylinder, exhaust filter, drying fan, drying heating tube, and drying cylinder. The air coming out of the drying cylinder circulates in this way, first filtering dust through the exhaust filter, and then heating the plastic particles through the heating tube to dry them.
[0017] By connecting the exhaust port of the drying cylinder to the air inlet of the drying fan, the heat from the drying exhaust can be recovered and utilized, increasing the inlet air temperature of the drying heating tube, reducing the working time of the heating tube, saving energy, and reducing the heat from the exhaust to the environment. By adding an exhaust filter to the drying exhaust port to filter dust, the drying exhaust can be prevented from polluting the factory.
[0018] In this embodiment, the air inlet of the drying heating tube 4 is also connected to the compressed air input pipe 6. Specifically, the compressed air input pipe 6 is equipped with an air dehumidifier 7 and two control valves. By providing low dew point air through the compressed air input pipe and injecting it into the drying circuit, a better dew point value of the dried air can be obtained, thus improving the drying performance.
[0019] like Figure 1 As shown, a pressure relief valve 5 is installed between the exhaust port of the drying cylinder 1 and the exhaust filter 2. By providing low dew point air to the drying circuit through the compressed air input pipeline, and simultaneously installing a pressure relief valve on the drying exhaust circuit, a better dew point value of the drying air can be obtained, thus improving drying performance.
[0020] like Figure 1As shown, a regulating valve 8 is installed between the exhaust filter 2 and the air inlet of the drying fan 3. The exhaust filter 2 is located close to the air inlet of the drying fan 3. This facilitates the recovery and utilization of heat from the drying exhaust through valve adjustment, without causing environmental pollution.
[0021] This utility model of an energy-saving hot air dryer recovers and utilizes the heat from the drying exhaust, increases the inlet air temperature of the drying heating tube, reduces the working time of the heating tube, saves energy, reduces the heat from the exhaust to the environment, avoids pollution of the factory by the drying exhaust, and improves drying performance.
[0022] The above descriptions are specific embodiments of this utility model and do not constitute a limitation on the scope of protection of this utility model. Any modifications and variations made to the technical concept of this utility model should be included within the scope of protection of this utility model.
Claims
1. An energy-saving hot-air dryer characterized by comprising: The dryer comprises a drying cylinder, a drying heating pipe and a drying fan, an exhaust port of the drying cylinder is connected with an air inlet end of the drying fan through an exhaust filter, an air outlet end of the drying fan is connected with an air inlet end of the drying heating pipe, an air outlet end of the drying heating pipe is connected with an air inlet port of the drying cylinder, and the air inlet end of the drying heating pipe is connected with a compressed air input pipeline.
2. The energy-saving type hot-air drying machine according to claim 1, characterized by A pressure relief valve is arranged between the exhaust port of the drying cylinder and the exhaust filter.
3. The energy-saving type hot-air drying machine according to claim 1, characterized by The compressed air input pipeline is provided with an air dehumidifier and at least one control valve.
4. The energy-saving type hot-air drying machine according to claim 1, wherein An adjusting valve is arranged between the exhaust filter and the air inlet end of the drying fan.
5. The energy-saving type hot-air drying machine according to claim 1 or 4, characterized by The exhaust filter is arranged close to the air inlet end of the drying fan.