Energy-saving heat recovery device for exhaust air of drying type equipment

By combining plate-fin heat exchangers, preheaters, and reheaters, the energy waste and cross-contamination problems of traditional drying equipment are solved, achieving high efficiency, energy saving, and cross-contamination-free heat recovery. This technology is suitable for industries with strict air quality requirements, such as food processing and pharmaceutical production.

CN224516977UActive Publication Date: 2026-07-17ZIBO QIYU AIRCONDITION ENERGY RECOVERY EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZIBO QIYU AIRCONDITION ENERGY RECOVERY EQUIP
Filing Date
2025-07-31
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional drying equipment wastes energy and pollutes the environment when discharging high-temperature and high-humidity waste heat, and existing heat recovery solutions pose a risk of cross-contamination.

Method used

Plate-fin heat exchangers are used to achieve non-contact heat exchange between fresh air and waste heat air. Combined with preheaters and reheaters, multi-stage heating is carried out using the waste heat of heating steam to ensure a significant increase in fresh air temperature and avoid cross-contamination.

Benefits of technology

It achieves high efficiency and energy saving, reduces energy consumption, avoids cross-contamination, meets environmental protection requirements, and improves the cleanliness of the production environment and product quality.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224516977U_ABST
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Abstract

The utility model belongs to heat exchange equipment technical field, concretely relates to a kind of drying equipment exhaust energy-saving heat recovery device, including shell, parallelly arranged fresh air supply duct and waste heat exhaust duct are equipped in shell, fresh air supply duct and waste heat exhaust duct are respectively equipped with air supply fan and exhaust fan, fresh air supply duct and waste heat exhaust duct flow direction is opposite, and in the heat exchange cavity confluence of shell middle part, heat exchanger is equipped in heat exchange cavity, fresh air and waste heat air pass through heat exchanger and carry out medium non-contact heat exchange;Fresh air supply duct end is equipped with reheater, reheater is connected heating steam pipeline.The utility model uses plate-fin heat exchanger to realize fresh air and waste heat air medium non-contact heat exchange, can sufficiently recover the heat in the high-temperature high-humidity waste heat air exhausted by drying equipment, transfer it to low-temperature fresh air, make fresh air temperature significantly increase, and there is no cross contamination.
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Claims

1. A kind of energy-saving heat recovery device of exhaust of drying type equipment, it is characterized in that, The device includes a shell, inside which a fresh air supply duct and a waste heat exhaust duct are arranged in parallel. A supply fan (10) and an exhaust fan (14) are respectively installed in the fresh air supply duct and the waste heat exhaust duct. The fresh air supply duct and the waste heat exhaust duct flow in opposite directions and converge in the heat exchange chamber in the middle of the shell. A heat exchanger (4) is installed in the heat exchange chamber. Fresh air and waste heat air undergo non-contact heat exchange through the heat exchanger (4). A reheater (6) is installed at the end of the fresh air supply duct, and the reheater (6) is connected to a heating steam duct (9).

2. The energy saving heat recovery device for exhaust air of drying type equipment according to claim 1, characterized in that, The heat exchanger (4) is a plate-fin heat exchanger.

3. The energy-saving heat recovery device for exhaust ventilation of drying equipment according to claim 2, characterized in that, The heat exchanger (4) is provided with a water collection tray (13) below it, and the water collection tray (13) is connected to the drain outlet (12).

4. The energy-saving heat recovery device for exhaust air of drying-type equipment according to any one of claims 1 to 3, characterized in that, The fresh air supply duct is equipped with a preheater (3) at the head end. The preheater (3) is connected in series with the reheater (6) through a heating steam pipe (9). The steam first flows through the reheater (6) and then through the preheater (3).

5. The energy saving heat recovery device for exhaust air of drying type equipment according to claim 1, characterized in that, Both the fresh air supply duct and the waste heat exhaust duct are equipped with a primary filter (2).

6. The energy saving heat recovery device for exhaust air of drying type equipment according to claim 5, characterized in that, A medium-efficiency filter (11) is installed in the middle of the fresh air supply duct, and a high-efficiency filter (7) is installed at the end.