Waste heat recovery mechanism of grain drying tower
By designing a waste heat recovery mechanism for the grain drying tower, the medium-temperature air recovered from the cooling section is mixed with the external cold air for heating, thus solving the problem of high energy consumption and achieving energy-saving effects.
Patent Information
- Application Number
- CN202422504156.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-16
AI Technical Summary
Existing grain drying equipment has the problem of high energy consumption and is unable to effectively recycle and utilize the waste gas discharged during the drying process.
A waste heat recovery mechanism for a grain drying tower is designed. The medium-temperature air is recovered through the cooling section and mixed with the external cold air before being heated and directly used in the drying process, thus reducing the calorific value required to heat to the drying target temperature.
It has achieved the goal of reducing combustion costs, improving energy efficiency and saving more than 30% of energy without affecting the drying effect.
Smart Images
Figure CN223361044U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a waste heat recovery mechanism for a grain drying tower. Background Art
[0002] Since the moisture contained in grains has a direct impact on the storage, transportation and processing of grains, it is necessary to ensure that the grains have the required moisture content, especially the newly harvested grains have a higher moisture content, which is very prone to fever and enzymatic changes. Grains must be dried and dehydrated before storage and long-distance transportation, so grain drying equipment is becoming more and more widely used. However, the mainstream grain drying equipment on the market is unable to centrally collect and treat the exhaust gas discharged during the grain drying process, and is facing a trend of being gradually eliminated. Therefore, a more environmentally friendly grain drying equipment has been born on the market, but this equipment faces problems such as high energy consumption during use, and the gap with imported equipment is obvious. The waste heat recovery mechanism of a grain drying tower of the utility model is effectively optimized for the problem of high energy consumption in drying without affecting the drying effect. Utility Model Content
[0003] The purpose of the utility model is to solve the above deficiencies in the prior art and to provide a waste heat recovery mechanism for a grain drying tower.
[0004] A waste heat recovery mechanism for a grain drying tower comprises a tower body and a grain channel. The grain channel is vertically arranged in the tower body, and an air inlet and an air outlet are formed between the inner wall of the tower body and the outer wall of the grain channel. The grain channel is an open structure, with a feed port provided at the upper end of the grain channel and a discharge port provided at the lower end. A drying section is provided in the middle section, and a cooling section is provided between the drying section and the discharge port. An exhaust fan is provided at the bottom of the air outlet, and the exhaust port of the exhaust fan is connected to a gas processing device. A combustion chamber is provided at the bottom of the air inlet, and the combustion chamber is used to heat air. The cooling section is separated from the air outlet and the air inlet by a partition. A first chamber and a second chamber are respectively formed between the outer wall of the cooling section and the partition section. An air cooler is provided in the first chamber, and an opening communicating with the combustion chamber is provided on the inner wall of the second chamber.
[0005] Furthermore, the drying section includes an upper drying section and a lower drying section.
[0006] Furthermore, the tower body is made of steel or concrete.
[0007] Furthermore, a safety guardrail and an inspection platform are provided on the top of the tower.
[0008] Furthermore, an adjustable gate is provided at the feed port at the upper end of the grain channel to control the entry speed of grain.
[0009] Furthermore, a temperature sensor and a humidity sensor are provided inside the air inlet duct for real-time monitoring of the temperature and humidity of the hot air.
[0010] Beneficial Effects: Compared with existing technologies, this utility model uses a cold air blower to directly direct the medium-temperature air recovered from the cooling section into the front section of the burner. After mixing with external cold air, it is heated by the burner. The dry high-temperature air then enters the drying section for drying. This utility model directly uses the recovered waste heat to increase the temperature of the air before heating, directly reducing the calorific value required to heat the air to the target drying temperature, thereby reducing combustion costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of a waste heat recovery mechanism of a grain drying tower;
[0012] Figure 2 It is an internal schematic diagram of the waste heat recovery mechanism of a grain drying tower;
[0013] In the figure, 1. tower body, 2. grain channel, 3. gas processing device, 4. exhaust fan, 5. feed port, 6. upper drying section, 7. air inlet duct, 8. lower drying section, 9. cooling section, 10. combustion chamber, 11. second chamber, 12. first chamber, 13. air outlet duct, 14. air cooler. DETAILED DESCRIPTION
[0014] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.
[0015] like Figure 1-2 As shown, the tower body 1, the grain channel 2, the gas processing device 3, the exhaust fan 4, the feed port 5, the upper drying section 6, the air inlet 7, the lower drying section 8, the cooling section 9, the combustion chamber 10, the air outlet 13, and the air cooler 14;
[0016] A waste heat recovery mechanism for a grain drying tower includes a tower body 1 and a grain channel 2. The grain channel 2 is vertically arranged in the tower body 1. An air inlet 7 and an air outlet 13 are formed between the inner wall of the tower body 1 and the outer wall of the grain channel 2. The grain channel 2 is an open structure. A feed port 5 is provided at the upper end of the grain channel 2 and a discharge port is provided at the lower end. A drying section is provided in the middle, and the drying section includes an upper drying section 6 and a lower drying section 8.
[0017] In this example, a cooling section 9 is provided between the drying section and the discharge port, an exhaust fan 4 is provided at the bottom of the air outlet 13, the exhaust port of the exhaust fan 4 is connected to the gas treatment device 3, a combustion chamber 10 is provided at the bottom of the air inlet 7, the combustion chamber 10 is used to heat the air, the cooling section 9 is separated from the air outlet 13 and the air inlet 7 by a partition, a first chamber and a second chamber are respectively formed between the outer wall of the cooling section 9 and the partition section, a cooler 14 is provided in the first chamber, and an opening communicating with the combustion chamber 10 is provided on the inner wall of the second chamber.
[0018] In this embodiment, the tower body 1 is made of steel or concrete.
[0019] In this example, a safety guardrail and an inspection platform are provided on the top of the tower body 1.
[0020] In this example, an adjustable gate is provided at the feed port at the upper end of the grain channel 2 to control the feeding speed of the grain.
[0021] In this example, a temperature sensor and a humidity sensor are provided inside the air inlet duct 7 for real-time monitoring of the temperature and humidity of the hot air.
[0022] Instructions for Use: The arrows in the figure indicate the direction of gas flow. During the drying process, wet grain enters the grain column through the feed port 5, passes through the drying and cooling sections 9, and is discharged through the discharge port. The tower is equipped with two air duct systems, an exhaust fan 4 and a supply fan. These suction forces draw the drying medium into the drying section of the grain column, exchanging heat and moisture with the grain, achieving drying and moisture reduction. Simultaneously, cold air from outside enters the cooling section 9 through the air cooler 14, cooling the dried grain.
[0023] Exhaust fan 4 is located on the side of outlet duct 13 and is primarily used to draw high-humidity, low-temperature exhaust gas from above, sending it to the Shakron dust collector for purification before discharge. This design aims to utilize aerodynamic principles to reduce fan power consumption. Air cooler 14 is located below outlet duct 13 and is primarily used to deliver external cold air to cooling section 9. The low-humidity, medium-temperature exhaust gas (i.e., cooling exhaust gas) discharged from cooling section 9 is directly fed into combustion chamber 10, where it is mixed with a portion of the external cold air and then heated by a burner to form a high-temperature drying medium, which is then used to dry out precipitation. This achieves a more environmentally friendly and energy-efficient approach, potentially saving over 30% of energy.
[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A waste heat recovery mechanism for a grain drying tower, characterized in that: It includes a tower body and a grain duct. The grain duct is vertically arranged in the tower body. An air inlet and an air outlet are formed between the inner wall of the tower body and the outer wall of the grain duct. The grain duct is an open structure. A feed port is provided at the upper end of the grain duct, and a discharge port is provided at the lower end. A drying section is provided in the middle section, and a cooling section is provided between the drying section and the discharge port. An exhaust fan is provided at the bottom of the air outlet, and the exhaust port of the exhaust fan is connected to the gas treatment device. A combustion chamber is provided at the bottom of the air inlet, and the combustion chamber is used for heating air. The cooling section is separated from the air outlet and the air inlet by a partition. A first chamber and a second chamber are respectively formed between the outer wall of the cooling section and the partition section. An air cooler is provided in the first chamber, and an opening communicating with the combustion chamber is provided on the inner wall of the second chamber.
2. The waste heat recovery mechanism of a grain drying tower according to claim 1, characterized in that: The drying section comprises an upper drying section and a lower drying section.
3. The waste heat recovery mechanism of a grain drying tower according to claim 1, characterized in that: The tower body is made of steel or concrete.
4. The waste heat recovery mechanism of a grain drying tower according to claim 1, characterized in that: There are safety guardrails and maintenance platforms on the top of the tower.
5. The waste heat recovery mechanism of a grain drying tower according to claim 1, characterized in that: An adjustable gate is provided at the feed port at the upper end of the grain channel to control the entry speed of grain.
6. The waste heat recovery mechanism of a grain drying tower according to claim 1, characterized in that: A temperature sensor and a humidity sensor are installed inside the air inlet duct to monitor the temperature and humidity of the hot air in real time.