Table of contents
Chapter 1 Introduction 1
1.1 Overview of traditional grain dryers 1
1.2 Research on new household grain dryers 2< a i=3> 1.3 Existing technical conditions 2 1.4 Product status 2 Chapter 2 Design content 3 2.1 Design tasks 3 2.2 Design requirements 3 2.3 Concept of design plan 3. Chapter 3 Design Implementation. 3.1 Equipment operating conditions and requirements. 3.2 Equipment working procedures. 3.3 Control and continuity requirements. Reference 5 Acknowledgments. Appendix Drawing List. 2.1 Design tasks The hot air of the traditional dryer enters from the lower side of the barrel. Since the raw materials are stationary, the hot air is difficult to penetrate, making the drying The lower part is hot and the upper part is hot inside the machine. Sometimes the raw materials are sintered due to local overheating, causing blockage and making it more difficult for the hot air to enter other areas, so the expected drying effect cannot be achieved. This machine is designed as a two-stage propeller conveyor. The first stage sends the raw materials into the barrel, and the second stage lifts the raw materials to the upper part of the barrel and scatters them in an umbrella shape, while the hot air blows from the lower part of the barrel. The center is blown out to all sides, smoothly penetrating upward through the gap between the moving raw materials, so that the raw materials are fully heated under dynamic conditions. This machine has multi-functional features: as the raw materials are constantly tumbling in the barrel, hot air is continuously sprayed and transported from the micropores on the barrel wall at high pressure, thereby achieving a unified effect of uniform and dry air flow boiling. , multiple groups of thermostats are controlled separately, and working modes such as large flow and small flow are optional.
2.2 Design Requirements
1. The drying barrel is customized with a double layer (the inner layer is made of stainless steel), with heat insulation material sandwiched in the middle, thus achieving the effect of heat preservation and energy saving. The inner barrel and propeller, shaft, barrel, bracket, drop hopper, discharge port, etc. are all made of stainless steel.
2. One barrel of material is loaded every 5 minutes, and one barrel of grain is dried every 10 to 15 minutes.
3. Working environment: room temperature, indoors, outdoors.
4. Working voltage: three-phase 380V.
2.3 Concept of design plan
1. The main motor drives the lifting screw to load the grains, lifting the grains to a height of 2 meters, and then ejects them into the micro-hole cylinder. During the scattering process, high-temperature air flow passes through the precision-machined spiral micro-holes in a tornado state and convection in the cylinder, generating boiling airflow. , the grains are tumbled and dried, and the cylinder is equipped with a stirring mechanism to prevent the grains from falling and accumulating, causing uneven drying.
2. Heating system: Multi-wing centrifugal fans provide stable air supply, and are equipped with 3P heating fans.
3. Control system: Omron PLC main control equipped with temperature and humidity control module.
