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CN-122015467-A - Food dryer and control method thereof

CN122015467ACN 122015467 ACN122015467 ACN 122015467ACN-122015467-A

Abstract

The application provides a food dryer and a control method thereof, and belongs to the technical field of food processing equipment. The food dryer comprises a frame and a drying roller rotatably arranged on the frame, wherein one end of the drying roller is provided with a feeding shell fixed on the frame, the outlet end of the feeding shell extends to the inside of the drying roller, a hot air inlet and a material inlet which are communicated with a heat supply device are formed in the feeding shell, and a first lifting conveyor communicated with the material inlet is arranged outside the frame. According to the application, the feeding shell is stretched into the drying roller, so that hot air is used for preheating the entering wet materials preferentially, the feeding adhesion and blockage are effectively prevented, the drying and screening integration is realized by directly connecting the vibrating screening machine at the discharging end, and the drying tail gas is introduced into the feeding bin to preheat the wet materials through the gas collecting box, so that the waste heat recovery is realized. The application obviously improves the continuity and automation level of food drying operation, reduces energy consumption and labor cost and improves the product quality.

Inventors

  • CUI BAOXIA
  • WANG ZHONGCHENG
  • LI SHENGNAN
  • WANG HAIBO

Assignees

  • 三尚行(天津)食品股份有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (9)

  1. 1. The utility model provides a food dryer, includes frame (100) and rotationally installs stoving cylinder (200) on frame (100), its characterized in that, the one end of stoving cylinder (200) is provided with feed casing (300) that are fixed in on frame (100), the exit end of feed casing (300) extends to the inside of stoving cylinder (200), offer hot-blast import (310) that are used for with heating device intercommunication on feed casing (300), still be provided with material entry (320) on feed casing (300), the externally mounted of frame (100) with first promotion conveyer (400) of material entry (320) intercommunication.
  2. 2. The food dryer according to claim 1, characterized in that the other end of the drying drum (200) is provided with a discharge housing (500), the discharge housing (500) is communicated with an inlet of a vibratory screening machine (600) mounted outside the frame (100), an impurity discharge outlet (611) and a finished product discharge outlet (612) which are communicated with an inner cavity of the vibratory screening machine (600) are arranged on a screen box (610), the impurity discharge outlet (611) is positioned in an area above the screen, the finished product discharge outlet (612) is positioned below the screen, and the finished product discharge outlet (612) is connected with a second lifting conveyor (700).
  3. 3. The food dryer according to claim 2, characterized in that a belt conveyor (800) is connected at the feed inlet of the first lifting conveyor (400), a plurality of groups of V-shaped carrier rollers (810) are arranged below the conveying belt of the belt conveyor (800), and the V-shaped carrier rollers (810) support the bearing surface of the conveying belt in a groove-shaped structure with a low middle and high two sides.
  4. 4. A food dryer according to claim 3, characterized in that the feeding bin (900) is fixedly mounted above the belt conveyor (800), a supporting frame body (1000) is arranged at the lower part of the feeding bin (900), the mounting frame (100) of the belt conveyor (800) is fixed on the supporting frame body (1000), and the feed opening of the feeding bin (900) is positioned right above the belt conveyor.
  5. 5. The food dryer according to claim 4, characterized in that a gas collecting tank (2000) is provided at an end of the discharge housing (500), the gas collecting tank (2000) is communicated with the inner space of the feed bin (900) through a gas conveying pipe (3000), and an induced draft device is installed on the gas conveying pipe (3000).
  6. 6. The food dryer according to claim 4, characterized in that the first lifting conveyor (400) is in communication with the material inlet (320) via a transition box (4000), and that the transition box (4000) is rotatably provided with a regulating plate (5000) for regulating the flow of material and preventing the flow of air from flowing backwards.
  7. 7. The food dryer according to claim 2, characterized in that a spiral guide vane for guiding the forward movement of the material is fixedly installed on the inner wall of the drying drum (200).
  8. 8. The food dryer according to claim 1, characterized in that the first lifting conveyor (400) is communicated with the feed inlet through a hollow box body (6000), and a baffle plate (7000) is hinged on the hollow box body (6000).
  9. 9. A control method for a food dryer according to any one of claims 1-8, characterized by the steps of: Starting a vibration screening machine (600), a drying roller (200), a first lifting conveyor (400), a second lifting conveyor (700), a belt conveyor (800), a heating device and an induced air device communicated with a gas collecting tank (2000); parameter presetting, namely setting the rotating speed of a drying roller (200), the temperature of hot air and the running speed of a belt conveyor (800); The material falls to a belt conveyor (800) through a feeding bin (900), forms stable material flow on a groove-shaped conveying belt formed by a V-shaped carrier roller (810), and is conveyed to a first lifting conveyor (400); feeding and drying, namely feeding materials into a feeding shell (300) through a first lifting conveyor (400), preheating the materials by hot air, and then feeding the materials into a drying roller (200) to realize drying; waste heat recovery, namely conveying wet and hot tail gas generated by drying into a feeding bin (900) through a gas collecting box (2000) and a gas conveying pipeline (3000) by an induced draft device, and preheating wet materials in the feeding bin (900); and screening and outputting, namely, the dried material enters a vibration screening machine (600) for screening, and finished product particles enter a second lifting conveyor (700) for outputting through a finished product outlet (612).

Description

Food dryer and control method thereof Technical Field The application relates to the technical field of drying equipment, in particular to a food dryer and a control method thereof. Background In the industrial production process of food, drying is one of the key procedures of prolonging the quality guarantee period of food and improving the quality of products, and is widely applied to the processing treatment of dehydrated vegetables, dried fruits, grains, nuts and other materials. At present, the roller dryer becomes main stream equipment in the field of food drying due to the advantages of large processing capacity, uniform material heating, continuous operation and the like. The working principle is that the materials are contacted with hot air in a rotary roller, and the water evaporation is realized through heat exchange. However, in practical application, the existing drum-type food dryer still has some technical bottlenecks, which restrict the improvement of production efficiency and the stability of product quality. Firstly, in the feeding link, traditional feeding structure is often comparatively simple, and the wet material that waits to dry directly gets into high temperature cylinder, very easily leads to the surface bonding near the feed inlet because of moisture evaporates fast, and then forms caking or jam, not only hinders the normal entering of material, still influences the homogeneity of air current distribution in the drying chamber, leads to local overheat or stoving inequality. Secondly, the dried material is often mixed with impurities such as scraps, dust, unbroken lumps and the like, and additional screening equipment is required to be arranged for post-treatment. In addition, a large amount of high-temperature high-humidity tail gas generated in the drying process is usually directly discharged, a large amount of residual heat contained in the tail gas is not effectively utilized, so that energy is wasted, and the tail gas does not accord with the current industry development direction of green manufacturing, energy conservation and emission reduction. In addition, in the front end conveying link of feeding to the drying-machine, to spherical or easy rolling granular material, the material rolls to both sides easily when traditional flat belt carries, leads to the feed inhomogeneous, influences the stability of follow-up stoving technology. Therefore, how to break through the technical bottleneck, develop a food drying equipment which is smooth in feeding, integrates drying and screening, and is uniform and stable in feeding, and has important significance for improving the whole technical level of the food processing industry. Disclosure of Invention The embodiment of the application provides a food dryer and a control method thereof, which can realize stable and efficient screening and drying operation of materials and have the characteristics of compact structure, integrated functions, energy conservation, high efficiency and stable operation. In order to achieve the purpose, the embodiment of the application adopts the following technical scheme that the food material continuous treatment equipment comprises a rack, wherein a drying roller is rotatably arranged on the rack. One end of the drying roller is provided with a feeding device, the feeding device comprises a feeding shell fixed on the frame, and the outlet end of the feeding shell extends to the inside of the drying roller. The feeding shell is provided with a hot air inlet which is used for being communicated with an output port of the heating device. The feeding shell is also provided with a material inlet. The outside of frame installs the first lift conveyor that communicates with the material entry for promote and carry the material that waits to handle to the feeding casing in. Through the structure, hot air firstly enters the feeding shell area to preheat the entering wet material, so that the moisture on the surface of the wet material is quickly evaporated, adhesion and caking of the material due to instant high temperature and high humidity are effectively prevented when the material enters the drying roller, and smoothness of a feeding channel is ensured. Further, in order to realize the online screening of the dried materials, the other end of the drying roller is provided with a discharging device which is communicated with an inlet of the vibrating screening machine arranged outside the frame. The screen box of the vibration screening machine is provided with an impurity outlet and a finished product outlet which are communicated with the inner cavity of the screen box. The inlet position of the impurity outlet is flush with the upper region of the screen for guiding out the oversize products, and the inlet position of the finished product outlet is positioned below the screen for collecting and guiding out the undersize products. The other end of the finished product outlet is connected with a second l