CN-224230620-U - Drying device with exhaust heat recovery function

CN224230620UCN 224230620 UCN224230620 UCN 224230620UCN-224230620-U

Abstract

The utility model belongs to the technical field of drying equipment, and particularly relates to a drying device with exhaust heat recovery, which comprises a drying chamber, an exhaust channel, an air inlet fan, a third water inlet and the like, wherein the drying chamber is provided with a chamber air inlet and a chamber air outlet, the air inlet channel is provided with an exhaust air inlet, a first heat exchanger, an exhaust fan, an exhaust air outlet and the like which are sequentially communicated, the air inlet channel is provided with an air inlet, an air inlet fan, a second heat exchanger, an air inlet air outlet and the like which are sequentially communicated, the first water outlet is sequentially communicated with a circulating water pump, a one-way valve and a third water inlet to form closed-loop heat recovery waterway circulation, the second water outlet is divided into two ways, one way is communicated with a water return pipe and is communicated with an external heat source to form external heat source waterway circulation and the like.

Inventors

LI XINGYOU
LIN CHAOYANG
ZHENG MINFENG
CHEN BIN
FAN YAMING
SUN FENGBO
WEI LIANGYU

Assignees

福建省建瓯市朝阳竹编帽业有限公司
福建理工大学

Dates

Publication Date: 20260512
Application Date: 20250609

Claims (5)

1. A drying device with exhaust heat recovery, comprising: A drying chamber (1) provided with a chamber air inlet (102) and a chamber air outlet (101); An exhaust channel (2) is sequentially communicated with an exhaust air inlet (201), a first heat exchanger (203), an exhaust fan (204) and an exhaust air outlet (202), wherein the first heat exchanger (203) is provided with a first water inlet (2031) and a first water outlet (2032), and a first temperature sensor (205) and a first humidity sensor (206) are arranged in the exhaust channel; An air inlet channel (3) is sequentially communicated with an air inlet (301), an air inlet fan (303), a second heat exchanger (304) and an air inlet air outlet (302), and a second temperature sensor (305) and a second humidity sensor (306) are arranged in the air inlet channel; The air inlet (301) is communicated with the air inlet (102); The heat exchanger is characterized in that the second heat exchanger (304) is provided with a second water inlet (3041), a second water outlet (3043) and a third water inlet (3042) positioned between the second water inlet and the second water outlet; The second water inlet (3041) is communicated with a water inlet pipe (7) for connecting an external heat source, and the water inlet pipe is provided with an electric valve (9); the first water outlet (2032) is sequentially communicated with the circulating water pump (5), the one-way valve (6) and the third water inlet (3042) to form a closed-loop heat recovery waterway circulation; The second water outlet (3043) is divided into two paths, one path is communicated with the first water inlet (2031), and the other path is communicated with the water return pipe (8) and is communicated with an external heat source, so that the external heat source waterway circulation is formed.
2. The drying device with exhaust heat recovery as set forth in claim 1, wherein the second water inlet (3041) is close to the air inlet/outlet (302), the third water inlet (3042) is located in the middle of the second heat exchanger, and the second water outlet (3043) is close to the air inlet/outlet (301).
3. A drying apparatus with exhaust heat recovery as claimed in claim 1, wherein the water outlet end of the one-way valve (6) is directed to the third water inlet (3042) for ensuring one-way flow of water from the first heat exchanger (203) into the second heat exchanger (304).
4. The drying device with exhaust heat recovery as set forth in claim 1, wherein a first temperature sensor (205) and a first humidity sensor (206) are disposed between the exhaust air intake (201) and the first heat exchanger (203), and a second temperature sensor (305) and a second humidity sensor (306) are disposed between the intake air intake (301) and the second heat exchanger (304).
5. The drying device with exhaust heat recovery according to claim 1, further comprising a control system (4), wherein the control system (4) is electrically connected with the first temperature sensor (205), the first humidity sensor (206), the exhaust fan (204), the second temperature sensor (305), the second humidity sensor (306), the air inlet fan (303), the circulating water pump (5) and the electric valve (9) and is used for adjusting the air quantity of the exhaust fan (204) and the air inlet fan (303), the flow of the circulating water pump (5) and the water flow distribution proportion of the electric valve (9) according to the temperature and humidity data of the exhaust channel and the air inlet channel.

Description

Drying device with exhaust heat recovery function Technical Field The utility model belongs to the technical field of drying equipment, and particularly relates to a drying device with exhaust heat recovery. Background Most agricultural products are picked and then dried and processed, the temperature and humidity of the processing environment need to be adjusted to control the drying speed of the agricultural products, the temperature of the processing environment is required to be gradually increased, the humidity is required to be gradually reduced, three stages of early stage small temperature rise and slow humidity discharging, middle stage stable temperature and large humidity discharging and later stage large temperature rise and small humidity discharging are often required to be experienced, in the material drying process, on one hand, a heating device is required to heat the air in a drying chamber, on the other hand, a part of hot and humid air in the drying chamber needs to be continuously discharged, meanwhile, the part of hot and humid air in the drying chamber is supplemented, the humidity in the drying chamber is prevented from being excessively high, the drying quality and the drying speed are influenced, the discharged hot and humid air has higher energy and recycling value, in the prior art, the heat recoverer is used for preheating fresh air after recovering heat from exhaust, and then the other heat recoverer is used for reheating the preheated fresh air to meet the requirement of the air inlet temperature of the drying chamber, and the double heat exchangers can have the problems of complex structure, low waste heat utilization efficiency and difficult control due to the adoption of two sets of independent heat exchanging systems. Disclosure of utility model First, the technical problem to be solved Aiming at the problems of complex structure, low waste heat utilization efficiency and difficult control of the double heat exchangers in the prior art, the utility model provides a drying device with exhaust heat recovery, and aims to integrate the dual functions of waste heat recovery and secondary heating through a single heat exchanger and self-control of a control system, thereby realizing the effects of simple structure, high waste heat utilization rate and simple control. (II) technical scheme The utility model provides a drying device with exhaust heat recovery, which comprises: a drying chamber provided with a chamber air inlet and a chamber air outlet; The exhaust channel is sequentially communicated with an exhaust air inlet, a first heat exchanger, an exhaust fan and an exhaust air outlet, wherein the first heat exchanger is provided with a first water inlet and a first water outlet, and a first temperature sensor and a first humidity sensor are arranged in the exhaust channel; The air inlet channel is sequentially communicated with an air inlet, an air inlet fan, a second heat exchanger and an air inlet and outlet, and a second temperature sensor and a second humidity sensor are arranged in the air inlet channel; The air inlet is communicated with the air inlet of the chamber; The method comprises the following steps: The second heat exchanger is provided with a second water inlet, a second water outlet and a third water inlet positioned between the second water inlet and the second water outlet; the second water inlet is communicated with a water inlet pipe used for being connected with an external heat source, and the water inlet pipe is provided with an electric valve; the first water outlet is sequentially communicated with the circulating water pump, the one-way valve and the third water inlet to form a closed loop heat recovery waterway circulation; The second water outlet of the external heat source waterway is divided into two paths, wherein one path is communicated with the first water inlet, and the other path is communicated with the water return pipe and led to the external heat source to form external heat source waterway circulation; The cooperation also forms a hierarchical heating structure, wherein the second water inlet is connected with an external heat source, and the third water inlet receives and recovers waste heat, so that the mixed heating of the external heat source and the waste heat in the heat exchanger is realized. Further, the second water inlet is close to the air inlet and the air outlet, the third water inlet is positioned in the middle of the second heat exchanger, and the second water outlet is close to the air inlet. Further, the water outlet end of the one-way valve points to the third water inlet and is used for ensuring that water flows from the first heat exchanger to the second heat exchanger in one way. Further, a first temperature sensor and a first humidity sensor are arranged between the exhaust air inlet and the first heat exchanger, and a second temperature sensor and a second humidity sensor are arranged between the air inlet and