Dynamic grain particle product circulation drying equipment

Abstract

The present application relates to the technical field of grain drying equipment, and specifically discloses a dynamic type circulating drying equipment for grain grain products, including a heat pump and a drying chamber, a controller is also provided outside the drying chamber, the heat pump is electrically connected to the controller, a circulating air inlet is provided at the upper end of the heat pump, a circulating air return port is provided at the upper end of the drying chamber near the heat pump, the circulating air inlet and the circulating return port are connected by a circulating air duct, dehumidification fans are provided on both sides of the circulating return port, a feed port is provided at the upper end of the drying chamber away from the heat pump, and a material transport mechanism is provided outside the feed port; a hot air duct is provided between the drying chamber and the heat pump, a through hole is provided on the side wall of the drying chamber at the hot air duct, a sensor is provided in the drying chamber, and a discharger is electrically connected to the controller. The purpose of this patent is to solve the problems of low automation level of the existing drying equipment, manual addition and discharge of materials, uneven heating of materials, poor thermal circulation of the drying equipment, and low heat utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of grain drying equipment, in particular to dynamic circulation drying equipment for grain particle products. Background Art

[0002] With the development of modern science and technology, people need to reduce the moisture content of grains and other crops in order to extend their shelf life. This is usually done by manually exposing the crops to the sun. This method radiates heat directly onto the product, resulting in uneven heating of the product, heavy dust pollution, and a long dehydration time. To improve efficiency, corresponding drying equipment has been developed. However, existing drying equipment cannot automatically feed and discharge materials and requires manual processing. Due to the large amount of material accumulation, the material is heated unevenly, resulting in uneven drying inside the drying chamber, making it difficult to determine whether the product in the middle of the drying chamber is dry. In addition, when dehumidifying the drying chamber, a large amount of heat is taken away, resulting in a large amount of heat waste in the entire drying equipment, low heat utilization, and poor thermal circulation. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the technical problem solved by the present invention is to provide a dynamic cereal grain product circulation drying equipment to solve the problems of low automation level of the existing drying equipment, manual addition and discharge of materials, uneven heating of materials, poor thermal circulation of the drying equipment, and low heat utilization rate.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: a dynamic cereal grain product circulation drying equipment, including a heat pump and a drying chamber, a controller is also provided outside the drying chamber, the heat pump is electrically connected to the controller, a circulating air inlet is provided at the upper end of the heat pump, a circulating return air outlet is provided at the upper end of the drying chamber close to the heat pump, the circulating air inlet and the circulating return air outlet are connected by a circulating air duct, a feed port is provided at the upper end of the drying chamber away from the heat pump, a material transport mechanism is provided outside the feed port, and the material transport mechanism is electrically connected to the controller; the drying chamber and the heat pump are connected through a hot air duct, a through hole is provided on the side wall of the drying chamber at the hot air duct, a humidity sensor and a pressure sensor are provided in the drying chamber, both the humidity sensor and the pressure sensor are electrically connected to the controller, a discharge port is provided at the bottom of the drying chamber, a discharger is provided at the lower end of the discharge port, and the discharger is electrically connected to the controller.

[0005] The technical principle of this technical solution is: when the grain particle product needs to be dried, the product is transported into the drying chamber through the conveying mechanism. When the pressure sensor detects that the weight of the product in the drying chamber reaches the weight setting value, the controller closes the conveying mechanism and starts the heat pump. The hot air generated by the heat pump enters the drying chamber through the hot air inlet. After passing through the product, the hot air flows to the top of the drying chamber, and a part of it enters the circulating air duct through the circulating return air port and flows back to the heat pump. During drying, the humidity in the drying chamber is monitored in real time by a humidity sensor arranged in the drying chamber. The humidity sensor transmits the humidity data to the controller in real time. When the humidity data received by the controller reaches the set value, the controller starts the discharging mechanism, and the product enters the discharging mechanism through the discharging port and is transported out. When the pressure sensor in the drying chamber detects that the weight of the product in the drying chamber is lower than the set minimum weight value, the controller closes the discharging machine and opens the conveying mechanism.

[0006] The beneficial effects of this solution are as follows: 1. By installing a controller, material transport mechanism, and discharger, as well as humidity and pressure sensors within the drying chamber, dynamic cycle drying of grain products is achieved, eliminating the need for manual intervention during the drying process, significantly improving product drying efficiency and reducing labor costs. 2. Heat is recovered within the drying chamber through a circulating return air duct, improving the overall thermal cycle efficiency of the drying equipment, avoiding significant heat waste, and achieving energy conservation and environmental protection.

[0007] Furthermore, the drying chamber is provided with air inlet panels at intervals. The air inlet panels comprise a V-shaped plate and a bottom plate, which together form a hollow triangular prism. The air inlet panels are provided with through-holes. Hot air flows through the hot air duct into the hollow triangular prism, and then into the drying chamber through the through-holes in the V-shaped plate. The spaced air inlet panels dry the central portion of the grain products, ensuring more uniform heating of the entire product within the drying chamber, effectively improving drying efficiency.

[0008] Furthermore, the discharging machine is a spiral discharging machine, which enables the products to be discharged slowly and orderly.

[0009] Furthermore, dehumidification fans are provided on both sides of the circulating return air port, and a dehumidification air duct is connected to the outside of the dehumidification fan, and the other end of the dehumidification air duct is connected to the heat pump. Connecting the dehumidification air duct to the heat pump improves the overall heat recovery effect of the drying chamber and improves the heat cycle efficiency.

[0010] Furthermore, the dehumidification fan is provided with a dust bag on its outer cover, and the dust bag is located in the dehumidification air duct. The dust bag is provided to effectively prevent dust, residue and other debris from the grain products in the drying room from entering the heat pump.

[0011] Furthermore, the side walls of the drying chamber, the dehumidification air duct, and the circulation air duct are all made of thermal insulation materials to prevent heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a cross-sectional view of an embodiment of the present invention.

[0013] Figure 2 This is a front view of the side wall and air induced plate of the drying chamber of the present invention.

[0014] Figure 3 It is a three-dimensional schematic diagram of the drying chamber and heat pump of the present invention.

[0015] Figure 4 This is a schematic diagram of Example 3 of the present invention.

[0016] Figure 5 for Figure 4 Enlarged view of part A. DETAILED DESCRIPTION

[0017] The following is further described in detail through specific implementation methods:

[0018] The figure marks in the drawings of the specification include: equipment box 10, feed port 11, material transport mechanism 20, circulating air inlet 31, heat pump condenser 32, fresh air valve 33, evaporator 34, circulating air outlet fan 35, hot air duct 36, heat pump external fan 37, drying chamber 40, circulating return air port 41, circulating air duct 42, air duct plate 43, humidity sensor 44, pressure sensor 45, dehumidification fan 46, trapezoidal through hole 47, discharger 50, discharge port 51, first cavity 52, controller 60, cooling device 70, dehumidification air duct 71, dehumidification air inlet 72, water outlet pipe 73, dust removal bag 74, drain pipe 75, water inlet pipe 76, fan blade 77, slider 78.

[0019] Example 1 is basically as shown in the attached Figure 1 、 Figure 2 、 Figure 3 As shown: A dynamic cereal grain product circulation drying equipment, including an equipment box 10, a heat pump and a drying chamber 40. The heat pump is provided with a heat pump condenser 32 and an evaporator 34 from top to bottom. A fresh air valve 33 is provided on the side wall of the heat pump away from the drying chamber 40, and a circulating air outlet fan 35 is provided on the side wall of the heat pump close to the drying chamber 40. The longitudinal side wall of the heat pump is also fixedly connected to a heat pump external fan at the evaporator position; fresh air is introduced from the outside through the heat pump external fan.

[0020] A controller 60 is also provided outside the drying chamber 40, and the heat pump is electrically connected to the controller 60. A circulating air inlet 31 is provided at the upper end of the heat pump, and a dehumidifying return air outlet is provided on the side wall near the drying chamber at the bottom evaporator of the heat pump. A circulating return air outlet 41 is provided on the side of the upper end of the drying chamber near the heat pump. The circulating air inlet 31 and the circulating return air outlet 41 are connected through a circulating air duct 42. Dehumidifying fans 46 are provided on both sides of the circulating return air outlet 41. A dehumidifying air duct 71 is connected to the outside of the dehumidifying fan, and the other end of the dehumidifying air duct 71 is connected to the dehumidifying return air outlet. A dust removal bag is provided on the outer cover of the dehumidifying fan 46, and the dust removal bag is located at the dehumidifying air outlet. In the channel 71, a feed port 11 is provided at the upper end of the drying chamber 40 on the side away from the heat pump, and a material transport mechanism 20 is provided outside the feed port 11, and the material transport mechanism 20 is electrically connected to the controller 60; the material transport mechanism 20 includes a bracket, a transmission wheel rotatably connected to the bracket, a material transport chain sleeved on the transmission wheel, and a material transport tray hinged to the material transport chain, and the transmission wheel is electrically connected to the controller 60; when the material needs to be dried, the material is placed in the material transport tray, the transmission wheel is started, the material is transported to the feed port and poured into the drying chamber, and then the transmission wheel drives the chain transmission to return the empty material tray, waiting for the next material transportation.

[0021] A hot air duct 36 is detachably connected between the drying chamber 40 and the heat pump. Several through-holes are provided on the sidewalls of the drying chamber 40 at the hot air duct 36. The drying chamber 40 has a funnel-shaped bottom. A humidity sensor 44 and a pressure sensor 45 are provided within the drying chamber 40. Both the humidity sensor 44 and the pressure sensor 45 are electrically connected to a controller 60. One to four humidity sensors 44 are provided, preferably two. The two humidity sensors are disposed on two opposing funnel-shaped sidewalls of the drying chamber 40 to facilitate detecting humidity levels in various portions of the drying chamber bottom. The pressure sensor 45 is located on the funnel-shaped sidewalls of the drying chamber 40. A discharge port 51 is provided at the bottom of the drying chamber 40. A discharger 50 is provided at the lower end of the discharge port 51 and is electrically connected to the controller 60. The discharger 50 is a shafted screw discharger comprising a tube, a motor, and a screw disposed within the tube. One end of the screw extends beyond the tube and connects to the motor, which is electrically connected to the controller. The side walls of the drying chamber 40, the dehumidification air duct 71, and the circulation air duct 42 are all made of thermal insulation materials.

[0022] An air induced draft plate 43 is provided at intervals in the middle of the drying chamber 40. The air induced draft plate 43 is located at the connection between the drying chamber and the hot air duct and above the funnel-shaped side wall at the bottom of the drying chamber. The air induced draft plate 43 includes a V-shaped plate and a bottom plate. The V-shaped plate and the bottom plate form a hollow triangular prism. A through hole is provided on the air induced draft plate 43. A trapezoidal through hole 47 is provided on the side wall of the drying chamber 40 between the V-shaped plate and the hot air duct 36 to increase the inflow of hot air. The hot air flows into the hollow triangular prism through the trapezoidal through hole 47 and flows into the drying chamber 40 through the through hole on the V-shaped plate. The air induced draft plates 43 arranged at intervals are conducive to accelerating the upward diffusion of hot air, thereby drying the middle and upper parts of the cereal grain products, making the overall product in the drying chamber 40 more evenly heated, and effectively improving the drying efficiency.

[0023] By setting up a controller 60, a material transport mechanism 20, a discharger 50, and setting up a humidity sensor 44 and a pressure sensor 45 in the drying chamber 40, the humidity sensor 44 transmits the collected humidity data to the controller 60 in real time. The controller 60 calculates the average value of each humidity data. When the humidity average value is lower than the preset humidity value, the controller 60 starts the spiral discharger to discharge the dried material; when it is detected that the average humidity of the material is higher than the preset value, the spiral discharger is turned off; the pressure sensor 45 detects the weight of the material and transmits the weight data to the controller 60 in real time. When the weight data is lower than the preset weight value, the controller starts the material transport mechanism 20 to add material to the drying chamber 40. Dynamic cycle drying of grain and granular products is achieved. No manual addition is required during the drying process, which significantly improves the drying efficiency of the product and reduces labor costs. The heat in the drying chamber 40 is recovered through the circulating return air duct, which improves the overall thermal cycle efficiency of the drying equipment, avoids a large amount of heat waste, and saves energy and is environmentally friendly.

[0024] Example 2 is basically as shown in the attached Figure 1 、 Figure 2 As shown, the same parts as those in Example 1 are not repeated here. The difference is that a first cavity 52 is provided in the main shaft of the spiral discharging machine 50, and a cooling device 70 is provided between the heat pump and the drying chamber 40. The cooling device 70 includes a cooling chamber, a water inlet pipe, and a water outlet pipe 73. A dehumidification air inlet 72 is provided in the cooling chamber near the heat pump. One end of the dehumidification air duct 71 is connected to the dehumidification fan 46, and the other end of the dehumidification air duct 71 is connected to the upper end of the cooling chamber. An S-shaped cooling water pipe is arranged in the vertical direction in the cooling chamber. The S-shaped cooling water pipe is detachably connected to the side wall of the cooling chamber. One end of the S-shaped cooling water pipe is connected to the water inlet pipe, and the other end of the S-shaped cooling water pipe is connected to the water outlet pipe 73. A water collecting tray is provided under the S-shaped cooling water pipe. The water outlet pipe 73 is arranged on the shell near the drying chamber 40, and the other end of the water outlet pipe 73 is connected to the first cavity 52 of the main shaft of the discharging machine 50.

[0025] Cooling water is introduced into the first cavity 52 of the discharger 50, which can preliminarily cool the products in the grain particles in the discharger 50 and shorten the cooling time of the material. At the same time, the moist air in the dehumidification duct 71 flows into the cooling device 70 and encounters the S-shaped cooling pipe to condense. Under the action of gravity, the condensed water flows into the water collecting tray along the S-shaped pipe wall. The dehumidified air then enters the evaporator to prevent the moist air from corroding the metal parts in the heat pump.

[0026] Example 3 is basically the same Figure 4 、 Figure 5 As shown, the same parts as those in Example 1 are not repeated here. The difference is that the dehumidification fans 46 arranged on both sides of the circulating return air inlet 41 are cancelled, and dehumidification outlets are provided on both sides of the circulating return air inlet 41. A dehumidification return air inlet is provided on the side wall near the drying chamber 40 at the bottom evaporator 34 of the heat pump, and the dehumidification outlet and the dehumidification return air inlet are connected by a dehumidification air duct 71; a first cavity 52 is provided in the main shaft of the discharging machine 50, and one end of the main shaft of the discharging machine 50 extends to the dehumidification air duct 71 The other end of the main shaft is connected to the water inlet pipe 76 through a rotary joint. One end of the main shaft of the discharging machine 50 is located in the dehumidification air duct 71 and is fixedly connected to the fan blade 77. A second cavity is provided in the fan blade 77, and the second cavity is communicated with the first cavity 52. A slider 78 is provided in the second cavity. The slider 78 is connected at the intersection of the first cavity and the second cavity through a spring. A one-way valve is provided in the first cavity 52 to only allow water to flow from the water inlet pipe 76 side to the fan blade 77 side. A drain valve is provided on the side wall of the main shaft near the fan blade 77. The drain valve is located in the dehumidification air duct 71 and is electrically connected to the controller 62. A drain pipe 75 is connected to the outside of the drain valve through a rotary joint, and the other end of the drain pipe 75 extends out of the dehumidification air duct; the discharging machine 50 is controlled by a stepper motor, and the stepper motor is electrically connected to the controller 60; the outer surface of the fan blade 77 is coated with a desiccant to prevent condensed water from scattering around when the fan blade rotates.

[0027] Cooling water is introduced into the first cavity 52 of the main shaft of the discharger 50 through the water inlet pipe. When the dried material needs to be discharged, the stepper motor controls the intermittent rotation of the main shaft of the discharger, so that the contact time between the dried material and the cooling water is prolonged, thereby improving the initial cooling effect. When the main shaft of the discharger 50 rotates, the fan blades 77 are driven to rotate. When the fan blades 77 rotate, the air flow in the dehumidification duct 70 is accelerated, thereby sucking in the hot and humid air in the drying room through the dehumidification outlet. At the same time, under the action of centrifugal force, the slider 78 is thrown from the interface between the second cavity and the first cavity into the end of the second cavity, thereby The cooling water in the first cavity between the fan blade 77 and the one-way valve is thrown into the second cavity, and the cooling water between the one-way valve and the water inlet pipe 76 flows into the space between the fan blade 77 and the one-way valve through the one-way valve. When the discharging machine 50 stops rotating, the controller 60 opens the drain valve, and the slider 78 squeezes the cooling water out of the second cavity under the action of the spring force, and the squeezed cooling water flows out along the drain pipe 75 through the drain valve, thereby realizing timely renewal of the cooling water in the first cavity; the hot and humid air in the drying chamber 40 flows into the dehumidification air duct 71 through the dehumidification outlet. When the hot and humid air flows through the fan blade 77, it condenses under the action of the cooling water in the fan blade 77, and then is absorbed by the desiccant provided on the fan blade.

[0028] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A dynamic circulation drying equipment for cereal grain products, comprising a heat pump and a drying chamber, characterized in that: A controller is also provided outside the drying chamber, the heat pump is electrically connected to the controller, a circulating air inlet is provided at the upper end of the heat pump, a circulating air return port is provided at the upper end of the drying chamber close to the heat pump, the circulating air inlet and the circulating return air port are connected by a circulating air duct, a feeding port is provided at the upper end of the drying chamber away from the heat pump, a material transport mechanism is provided outside the feeding port, and the material transport mechanism is electrically connected to the controller; the drying chamber and the heat pump are connected by a hot air duct, a through hole is provided on the side wall of the drying chamber at the hot air duct, a humidity sensor and a pressure sensor are provided in the drying chamber, both of which are electrically connected to the controller, a discharging port is provided at the bottom of the drying chamber, a discharging machine is provided at the lower end of the discharging port, and the discharging machine is electrically connected to the controller; A first cavity is provided in the main shaft of the discharging machine, and a cooling device is provided between the heat pump and the drying chamber. The cooling device includes a cooling chamber, a water inlet pipe, and a water outlet pipe. A dehumidification air inlet is provided in the cooling chamber close to the heat pump. One end of the dehumidification air duct is connected to the dehumidification fan, and the other end of the dehumidification air duct is connected to the upper end of the cooling chamber. An S-shaped cooling water pipe is arranged in the cooling chamber in a vertical direction. The S-shaped cooling water pipe is detachably connected to the side wall of the cooling chamber, one end of the S-shaped cooling water pipe is connected to the water inlet pipe, and the other end of the S-shaped cooling water pipe is connected to the water outlet pipe. A water collecting tray is provided under the S-shaped cooling water pipe. The water outlet pipe is arranged on the side of the shell close to the drying chamber, and the other end of the water outlet pipe is connected to the first cavity of the main shaft of the discharging machine.

2. The dynamic cereal grain product circulation drying equipment according to claim 1 is characterized in that: The drying chamber is provided with an air induction plate at intervals, the air induction plate is located at the hot air inlet, the air induction plate includes a V-shaped plate and a bottom plate, the V-shaped plate and the bottom plate form a hollow triangular prism shape, and the air induction plate is provided with a through hole.

3. The dynamic cereal grain product circulation drying equipment according to claim 1 is characterized in that: The discharging machine is a spiral discharging machine.

4. The dynamic cereal grain product circulation drying equipment according to claim 1 is characterized in that: Dehumidification fans are provided on both sides of the circulating return air outlet, and a dehumidification air duct is connected to the outside of the dehumidification fan, and the other end of the dehumidification air duct is connected to the heat pump.

5. The dynamic cereal grain product circulation drying equipment according to claim 4 is characterized in that: The dehumidification fan outer shell is provided with a dust removal bag, and the dust removal bag is located in the dehumidification air duct.

6. The dynamic cereal grain product circulation drying equipment according to claim 1, characterized in that: The side walls of the drying chamber, the dehumidification air duct and the circulation air duct are all made of thermal insulation materials.

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