498 results about "Grain drying" patented technology

The invention relates to the field of grain drying, and discloses a grain drying energy-saving control system based on intelligent optimization, which comprises the following steps: after warehousing grains are detected, judging whether the water content of the grains exceeds a preset safety threshold value or not by collecting the initial water content of the grains and environment temperature and humidity information; according to the grain moisture content, the grain size distribution and the current environment condition, a multi-section type moisture change trend model fitting the drying process is constructed, and the decrease rate of the grain moisture content and the drying curve form in the future stage are predicted; analyzing the deviation value between the water content change slope and the target drying rate in the prediction curve; judging whether an adjustment potential exists or not by modeling a response relationship among the current hot air temperature, wind speed, heat source power and water content change; and according to the heat energy use analysis result, control instructions of hot air temperature, air speed and air supply modes are automatically generated. The self-adaptive energy-saving grain dryer has the advantage that the self-adaptive capacity and the energy-saving effect in the grain drying process are improved.

The present application discloses a grain drying device, including a support frame, a drying box, a conveying device, a lifting device, a spiral conveying device, a heating component and a control system, wherein the drying box is arranged on the support frame, a vent is arranged at the top of the drying box, the conveying device is arranged on the support frame, and the output end of the conveying device extends into the drying box; the lifting device is vertically arranged in the drying box, and the bottom of the lifting device is connected with the output end of the conveying device; the spiral conveying device is arranged spirally around the lifting device, and the top of the spiral conveying device is connected with the top of the lifting device, and the bottom of the spiral conveying device is connected with the output end of the conveying device, wherein a downwardly inclined discharge pipe is arranged on the drying box and below the top of the spiral conveying device. Thus, the grain to be dried can be quickly and fully contacted with the heated air in a short time, effectively shortening the drying time, improving the drying efficiency, and thus effectively saving energy consumption and cost.

The invention relates to the technical field of grain drying, in particular to a sealing structure of a gas-phase rotary heat exchanger and the gas-phase rotary heat exchanger. The sealing structure comprises a rotary shell and gas flow distribution chambers externally embedded in the two ends of the rotary shell, and first annular butt joint grooves are formed in one ends of the inner walls of the two gas flow distribution chambers; second annular butt joint grooves are formed in one ends of the outer walls of the two airflow distribution chambers, first moving rings are fixed to the two ends of the rotating shell, the ends of the first moving rings are attached to the interiors of the first annular butt joint grooves, and sealing shaft sleeves are attached to the gaps between the exteriors of the first moving rings and the inner walls of the second annular butt joint grooves. The rotary shell can be embedded in the airflow distribution chamber to form a sealing structure of the gas-phase rotary heat exchanger, the loss amount of hot fluid at the joint of the rotary shell and the airflow distribution chamber is fully reduced, the heat exchange efficiency of the gas-phase rotary heat exchanger is guaranteed, and the sealing effect of the gas-phase rotary heat exchanger is improved.

The invention relates to the technical field of grain processing, in particular to a grain drying parameter regulation and control system based on correlation analysis, which comprises an identification module for acquiring and processing running state information of a grain dryer and physical attributes of grains and identifying the types of the grains; the strategy module is used for generating a corresponding drying strategy according to the initial physical attributes of the grains and the external environment information; the adjusting module is used for adjusting working parameters of the grain drying machine in real time; the monitoring module is used for monitoring the drying process of the grain drying machine; and the display module is used for displaying the processed running state information and the drying process of the grain drying machine. According to the method, the image information and the physical attributes of the grains are obtained, the grain types are accurately recognized through the machine learning algorithm, therefore, the drying efficiency and quality can be improved, meanwhile, the drying parameters are dynamically adjusted according to the real-time data and the external environment information, and it is further ensured that the drying process is in the optimal state all the time.

The invention discloses an anti-blocking control system and control method for a grain elevator and grain drying equipment, the anti-blocking control system comprises a first rotating speed detection device and a control device, the first rotating speed detection device is used for detecting the rotating speed of the elevator, and the control device is in signal connection with the first rotating speed detection device and a grain stirring wheel. And the control device is configured to control and reduce the rotating speed of the grain stirring wheel under the condition that the rotating speed of the elevator is determined to be reduced according to the detection result of the first rotating speed detection device, so that unsmooth conveying at the elevator can be relieved or avoided until the conveying returns to normal, the subsequent blockage phenomenon can be avoided without increasing the structure of the elevator, and the production efficiency is improved. The purpose of avoiding cost increase is achieved.

The conveying device for grain processing and production relates to the technical field of grain processing and comprises a grain feeding head, a blocking rod is fixedly arranged at the edge position of the inner side of the grain feeding head, a butt joint is fixedly arranged at the end, away from the grain feeding head, of the blocking rod, and a limiting fixing groove is fixedly formed in the outer side of the end, away from the blocking rod, of the butt joint. The outer side of the limiting fixing groove is slidably sleeved with a grain discharging barrel, and an impurity opening and a rotating sleeve are rotationally arranged on the side, symmetrical to the grain drying machine, of the middle of the grain discharging barrel. According to the conveying device for grain processing and production, by arranging the electromagnetic ring, the electromagnetic controller and other parts and electrifying the electromagnet, impurities such as iron nails and iron wires in flowing grains in the pipeline are captured and prevented from entering precise equipment such as a crusher and a pulverizer, equipment abrasion is avoided, the service life of the equipment is prolonged, and the cost is reduced; iron impurities are prevented from being mixed into the grains, and the quality of the grains is guaranteed.

The invention relates to the technical field of grain drying equipment, in particular to a hot air supply device for a low-temperature circulating grain dryer, which comprises an air inlet channel, an air supply device and an angular box, the air inlet channel comprises a tempering channel, a drying channel and a cooling channel; the tempering channel is connected with the upper layer of the tower body; the drying channel is connected with the tower body middle layer; the cooling channel is connected with the lower layer of the tower body; the air supply device is connected with the air inlet channel; the angular box is connected with the tower body; a hot air inlet channel is divided into three layers, the flow speed of hot air in the middle layer is the highest, the circulation area of a drying channel can be automatically reduced along with the increase of the humidity of the exhaust side, the air inlet speed of dry hot air is higher, moisture can be rapidly taken away, the number of horn-shaped boxes for exhaust is larger than that of horn-shaped boxes for air inlet, and the air exhaust amount in unit time is increased; the problem that the drying effect on the side close to an exhaust channel is poor due to the fact that the humidity of the hot air inlet side of the drying chamber is low and the humidity of the exhaust side is high is solved.

The invention relates to the technical field of grain drying equipment, in particular to an electric rapid grain discharging device of a grain dryer and an intelligent control method, and the electric rapid grain discharging device comprises a grain storage bin, a grain distributing assembly, a conveying assembly and an intelligent regulation and control unit. The grain distributing assembly achieves flexible grain discharging through a rotating disc and an adjusting ring, the conveying assembly adopts a conveying belt with protruding strips to prevent grain from sliding, and the intelligent regulation and control unit combines multi-sensor data and a fuzzy logic algorithm to dynamically adjust the grain discharging speed and flow. Through structure optimization and intelligent control, the grain discharging efficiency, stability and adaptability are remarkably improved, the problems of unstable flow and low intelligent degree in the prior art are solved, and reliable technical support is provided for modernized agricultural production.

The invention relates to a waste vinasse drying treatment method. The method comprises the following steps: carrying out mechanical pressure filtration on original waste vinasse provided in batches in a solid-liquid separation manner; dehydrating the waste distiller's grains in a manner of removing moisture in the waste distiller's grains and gas influencing the caking rate; and screening the high-fiber waste vinasse and the heated and dehydrated waste vinasse separated from the organic matter-enriched waste vinasse based on a protein content differential separation mode to obtain oversize products for pyrolysis and undersize products for feed. According to the method, more moisture is reserved in the waste distiller's grains with high caking rate in mechanical filter pressing, the water in the waste distiller's grains can enable the waste distiller's grains to be agglomerated more easily, meanwhile, the high heat capacity characteristic of water can provide more uniform heat conduction for the waste distiller's grains, and the situation that the internal and external dehydration uniformity is not uniform due to local overheating of the waste distiller's grains is avoided.

The utility model discloses a movable grain drying device which comprises a vehicle body, a lifting device, a grain barrel, a conveying device and a drying assembly, the lifting device comprises a first frame body and a second frame body, and a feeding port and a driven shaft are arranged at the bottom of the first frame body; a driving shaft, a first discharging port, a second discharging port and a discharging baffle are arranged at the top of the second frame body, the grain barrel comprises a first barrel body, a second barrel body and a third barrel body which are sequentially arranged in a sleeving mode from outside to inside, a second telescopic assembly is arranged on the outer side of the grain barrel, and a grain discharging device is arranged at an outlet in the bottom of the first barrel body. The two ends of the conveying device are matched with the grain discharging device and the first frame body respectively, the drying assembly comprises a hot air assembly and a drying cylinder, and the drying cylinder is installed in the grain cylinder. The grain barrel can stretch out and draw back, and the lifting device can be bent, so that the grain drying machine is small in size, low in height, convenient to move and transport and high in grain drying efficiency.

A system configured to collect a representative sample of dried grain from an industrial grain dryer to inform the dryer's automatic temperature controller includes: a plurality of drop tubes each having a top end and a bottom end, wherein the top end of each drop tube is communicatively coupled to a respective dump chute of the grain dryer and configured to receive a respective partial grain sample from the dump chute; connective tubing communicatively coupling the bottom ends of the plurality of drop tubes; an air blower communicatively coupled to a proximal end of the connective tubing, wherein the air blower is configured to propel the partial grain samples distally through the connective tubing; and a collection box communicatively coupled to a distal end of the connective tubing, wherein the collection box is configured to receive and aggregate the partial grain samples into a combined sample for moisture testing.

The invention discloses an energy-saving damp and hot airflow drying and air supplementing device for grain drying. A damp and hot air opening, a direct air supplementing opening, a hot air supplementing opening, an air return opening and a dehumidification opening are sequentially formed in a shell from bottom to top. The porous core column is installed in the shell and provided with at least one direct air supplementing channel and at least one damp and hot air channel, an air inlet of the direct air supplementing channel is communicated with the direct air supplementing opening, an air outlet of the direct air supplementing channel is communicated with the air return opening, and an air inlet of the damp and hot air channel is communicated with the damp and hot air opening; the breathable heat accumulator is installed in the shell, an air outlet channel of the breathable heat accumulator communicates with an air outlet of the humid and hot air channel and the dehumidification opening, and an air inlet channel of the heat accumulator communicates with the hot air supplementing opening and the air return opening. The device adopts a means of simultaneously storing moisture removal and air supply, does not cause the fluctuation of the pressure of a drying system, and is suitable for large-scale or long-stroke multi-point airflow moisture removal and drying work; in addition, on the basis of the waste heat recovery function, fresh air supplemented to the outside is heated, the heat loss is small, and the utilization rate is high.

The invention discloses a grain drying on-line moisture monitoring method and system, and relates to the technical field of grain drying. A moisture sensor is installed at a grain discharging section of drying equipment; when the drying equipment works, online multi-point correction is carried out when the instrument displays moisture data; after grain feeding of the drying equipment is finished, circularly operating for set time, and sampling after moisture display is stable; when the error between the moisture displayed by the instrument and the actual moisture reaches a set condition, correcting the error; and when the water content in the drying equipment is lower than a preset alarm value, the grain discharge standard is reached. According to the invention, the moisture content of uniformly flowing grain particles can be accurately and continuously measured in the production process, and the monitoring data is closest to the actual drying result; the original drying tower structure is not influenced, and the automation degree of the grain drying process is improved.

The invention relates to the technical field of drying processing, in particular to an automatic drying device and method for grain processing, and the automatic drying device comprises a base, a roller, an adjusting unit and a hot air unit. According to the grain drying machine, the length of a material curtain raised by grains in the accumulation area is reduced by means of the adjusting unit, namely, the uniformity of the raised grains is reduced, the material curtain formed when the second raising plate raises the grains in the middle drying area is uniform and is in the maximum length, the grains are uniformly dispersed and dried, and the drying efficiency is improved. Therefore, the problem that grains are overheated due to the fact that the grains are excessively raised close to a hot air area is avoided, and internal and external common drying is formed through a hot air cylinder, an air outlet sleeve and an auxiliary heating ring in the hot air unit. Meanwhile, in the middle drying area, it is ensured that hot air still has heat needed for drying after flowing from right to left by means of heat transferred into the auxiliary heating ring after the roller is heated, and the drying effect of the middle drying area (away from a large amount of hot air outlet area) on the grains is improved.

The utility model relates to the technical field of agricultural product drying, and provides a waste gas circulation heat energy recovery dryer which comprises a drying bin and a hot gas circulation system. The hot air circulation system comprises a centrifugal dehumidifier used for separating water and impurities in hot air; one end of the moisture pipe is connected with the drying bin air outlet, and the other end of the moisture pipe is connected with the moisture inlet of the centrifugal dehumidifier; one end of the dry air pipe is connected with an air outlet of the centrifugal dehumidifier; the fan is used for driving hot air in the drying bin to flow into one end of the moisture pipe; an air outlet of the heater is communicated with an air inlet of the drying bin, and an air inlet of the heater is connected with a circulating valve and communicated with the other end of the dry air pipe through the circulating valve. The grain drying device has the advantages that in the grain drying process, drying waste gas is recycled, few impurities exist after drying, the safe water content of grains can be achieved, waste heat of the waste gas is recycled, energy consumption of equipment for gas processing is reduced, and energy is saved.

The invention belongs to but is not limited to the technical field of grain drying equipment, and discloses a ventilation corner box and double-side grain feeding combined drying system which comprises a ventilation corner box module and a double-side grain feeding anti-blocking elevator module. The ventilation corner box modules are installed in the drying bin and arranged in multiple layers in the vertical direction, the arrangement directions of every two adjacent layers of ventilation corner boxes are perpendicular, the ventilation corner boxes on one layer are transversely arranged, the ventilation corner boxes on the next layer are longitudinally arranged, and a criss-cross structure is formed. A plurality of air uniformizing devices are arranged in the transverse air inlet angle boxes arranged in the length direction of the drying bin at intervals, and ventilation holes are formed in the side walls of the two ends of the longitudinal air outlet angle boxes arranged in the width direction of the drying bin. The double-side grain feeding anti-blocking elevator module is arranged at the lower end of the ventilation corner box module and comprises two sets of symmetrically-arranged grain discharging mechanisms and an elevator. The system integrates multiple functions of drying, lifting, grain discharging, circulating and the like.

The present application relates to the technical field of grain drying, and particularly relates to a combustion chamber convenient to transport and assemble. The combustion chamber comprises a burner, a horizontally placed outer cylinder, a base welded at the bottom of the outer cylinder, an equal-length inner cylinder coaxially fixed in the inner part of the outer cylinder, a connecting rod arranged between the outer periphery of the outer cylinder and the inner cylinder, a screen mesh arranged at one end of the outer cylinder, an end plate arranged at one end of the inner cylinder and outside the screen mesh, a nozzle of the burner penetrating through the end plate and the screen mesh and extending into the inner cylinder, and a heat preservation pipeline connected to the other end of the outer cylinder. The base, the inner cylinder and the outer cylinder are prefabricated in a split manner, which not only saves materials compared with traditional combustion chambers, but also is convenient to transport. The assembled combustion chamber saves time and labor, and the manual construction time is short, which can ensure the construction period. The combustion medium in the inner cylinder is provided with a heat source by the burner, hot air is output through the heat preservation pipeline, the refractory layer prevents the damage of high temperature to the inner wall of the combustion chamber, the cold air door adjusts the supply temperature, and the air tunnel cools the nozzle of the burner located in the inner part of the end plate.

This utility model relates to a material discharge structure for a grain drying channel in a grain discharge section, including a hopper. Multiple grain discharge channels are horizontally arranged at equal intervals above the hopper. Each grain discharge channel has a trapezoidal groove suspended in its upper center. One end of the bottom surface of the trapezoidal groove has multiple material discharge holes evenly spaced along its long axis, and the other end has a stroke hole along its long axis. A control valve plate is attached to the bottom surface of the trapezoidal groove. The control valve plate has valve holes at equal intervals along its long axis, the same number as the material discharge holes, but staggered. A pull rod is suspended directly below the bottom surface of the end of the trapezoidal groove facing the stroke hole. A guide gasket is axially fitted onto the pull rod, and the guide gasket is perpendicularly connected to the bottom surface of the corresponding end of the trapezoidal groove. The outer end of the pull rod passes through the end wall of the corresponding grain discharge channel, and its inner end is connected to a linkage frame located directly below the stroke hole and connected to the control valve plate. This utility model can effectively solve problems such as material accumulation and blockage, and improve drying efficiency and uniformity.

The utility model relates to the field of assembling of bucket elevators and grain dryers, in particular to a self-locking clamping butt-joint fixing device which comprises a lock hook assembly arranged on a bucket elevator barrel, the lock hook assembly comprises a pull plate rotationally connected with the bucket elevator barrel, and a pull rope and a clamping hook are arranged at the two ends of the pull plate respectively; the locking arm assembly is arranged on the grain dryer barrel, and the locking arm assembly is provided with a clamping groove matched with the clamping hook; the clamping hook of the lock hook assembly can be correspondingly clamped in the clamping groove of the lock arm assembly so that the bucket elevator can be fixedly locked to the grain dryer, and the clamping hook can be separated from the clamping groove by pulling the pull rope so that locking between the clamping hook and the clamping groove can be relieved. No special climbing equipment is needed, the bucket elevator can be quickly locked to the grain drying machine, and meanwhile locking between the bucket elevator and the grain drying machine can be quickly relieved.

The utility model relates to the technical field of grain storage and drying, and discloses a grain drying box for grain storage, which comprises a supporting seat, the top of the supporting seat is fixedly connected with a connecting plate, the top of the connecting plate is provided with a grain vibration uniformizing mechanism, and the top of the connecting plate is rotatably connected with a feeding box. A feeding port is formed in the left side of the feeding box, a material guide plate is fixedly connected to the left side of the feeding box, a vibration box is fixedly connected to the left side of the feeding box, a first heating plate is arranged in the box wall of the back of the front face of the vibration box, and a drying mechanism is arranged at the top of the vibration box. Grain is evenly fed into the vibration box, the grain is vibrated and turned over in the vibration box, the drying efficiency is improved, through the arranged drying mechanism, the starting air pump and the heating plate, air is heated firstly, then the air is blown into the vibration box through the air blower, and drying of the grain is accelerated.

The utility model discloses a grain drying device, and belongs to the technical field of grain drying. The grain drying device comprises a drying tower, a drying layer, a material stirring mechanism, a rapid drying layer and a conveying mechanism which are sequentially arranged from top to bottom, the drying layer is provided with an exhaust mechanism, the rapid drying layer is provided with an air inlet mechanism, the drying tower and the drying layer are used for stacking grains, and the material stirring mechanism is used for enabling the grains to move in the rapid drying layer in a dispersed mode. Through cooperation of the drying layer, the shifting mechanism and the quick drying layer, grains are stacked and pre-dried in the drying layer, the overall grain storage amount of the grain drying device is increased, drying of a thick grain layer is achieved, and the overall drying efficiency is improved; the drying rate of the pre-dried grains can be guaranteed under the condition that the flow speed of the pre-dried grains in the quick drying layer is increased, the drying efficiency of the grains is further improved, the grains in the drying layer and the quick drying layer move downwards, air moves upwards, and countercurrent drying is always achieved, so that the drying efficiency is improved.

The invention provides preheating / cooling fluidized bed equipment for grain drying. A feed port assembly is arranged at the top of a fluidized bed shell; wherein the feeding port assembly is connected with a discharging port of the first elevator through a feeding pipe; a discharge hole assembly is arranged at the lower end of the side wall of the fluidized bed shell, and is connected with a lifter II; wherein an upper-layer fluidization plate assembly, a material sliding plate assembly and a lower-layer fluidization plate assembly are sequentially and obliquely arranged in the fluidized bed shell from top to bottom; an air sweeping assembly is arranged above the material sliding plate assembly; the side wall of the fluidized bed shell is connected with an air collecting box, and the air collecting box is provided with three air outlets matched with the upper-layer fluidization plate assembly, the air sweeping assembly and the lower-layer fluidization plate assembly; wherein one end of the air collecting box is connected with the fluidization air system. The low-temperature drying amount is large, free water molecules are taken away by the air speed, and the grain preheating stability is guaranteed.

The utility model particularly relates to a grain drying device which comprises a box body, an air heater is arranged in the box body, a drying cylinder is arranged above the box body, a rotatable spiral discharging plate I is arranged in the drying cylinder, a cover plate is arranged at the upper end of the drying cylinder, a discharging hopper and an exhaust pipe are arranged on the cover plate, and a discharging pipe is arranged on the side face of the lower end of the drying cylinder. According to the technical scheme, grain drying can be achieved, and meanwhile the drying efficiency can be improved by means of the technical scheme that the grain can be continuously discharged and dried; a first spiral discharging plate and a second spiral discharging plate which can rotate relatively are arranged, a rotating motor drives a rotating rod to rotate, then the first spiral discharging plate is driven to rotate, and grains on the first spiral discharging plate and grains on the second spiral discharging plate are staggered. And meanwhile, rotation of the first spiral discharging plate can effectively drive grains above the first spiral discharging plate to fall down, so that the problem of material blockage is solved.

The invention provides movable grain drying equipment, and relates to the technical field of grain drying, the movable grain drying equipment comprises a movable chassis, a hot blast stove is mounted on the movable chassis, the hot blast stove is connected with a hot air box, a drying cylinder is mounted on the hot air box, the drying cylinder is connected with a conveying mechanism, and one end of the conveying mechanism is communicated with the lower end of the drying cylinder; a grain outlet is formed in the other end of the conveying mechanism; an air inlet and an air outlet are formed in the side wall of the drying cylinder, the air inlet is located in the lower portion of the drying cylinder and communicates the drying cylinder with the hot air box, and the air outlet is located in the upper portion of the drying cylinder and communicates the drying cylinder with the outside; multiple layers of sieve plates are installed in the drying cylinder, sieve holes are formed in the plate faces of the sieve plates, a scraper is correspondingly installed above each sieve plate and connected with a rotating shaft, the upper end of the rotating shaft is connected with a first motor, the first motor is fixed to the top of the drying cylinder, and a grain inlet allowing grain to enter is further formed in the top of the drying cylinder. The technical problems that in the prior art, during grain drying, energy consumption is large, and the crack ratio is high are solved.

The utility model discloses a hot air grain drying machine, and relates to the technical field of grain drying. A motor is fixedly connected to one side of the heat preservation cover, the output end of the motor penetrates through the end face of the heat preservation cover and extends into an inner cavity of the heat preservation cover, a heating structure is fixedly connected to one side of the upper end of the heat preservation cover, a rotating groove is formed in the middle of the heat preservation cover, and a driving structure is arranged in an inner cavity of the rotating groove and used for driving grains to rotate and comprises a supporting rod. Through the cooperation of the heat preservation cover and the heating structure, waste gas in the inner cavity of the heat preservation cover can be absorbed through the heating structure, then air sucked by the heating structure is preliminarily heated through the waste gas, and therefore the time and energy needed by the heating structure for heating the air can be shortened; through cooperation of the motor and the driving structure, grains in the inner cavity of the grain cage structure can be heated more uniformly, and the situation that the grains are caked in the drying process, and consequently the drying quality is affected is prevented.

In some embodiments, a grain drying apparatus may include a drum with a grain auger including a flighting with air holes. The drum may be surrounded by an outer drum, the inner drum including a plurality of drum air holes. A volume of dehydrated air may pass around a helical air diverter, located in an annulus between the inner drum and the outer drum, and through the grain, thereby drying the grain.

The utility model provides a multi-layer sieve plate mechanism for a grain drying and preheating fluidized bed. An upper-layer sieve plate, a material sliding plate and a lower-layer sieve plate are sequentially arranged in a preheating box from top to bottom; an air sweeping box is arranged above the material sliding plate; the upper-layer sieve plate is obliquely arranged at the top of the upper-layer air bellow; the lower-layer sieve plate is obliquely arranged at the top of the lower-layer bellows; the material sliding plate is obliquely arranged in the preheating box; an air chamber pattern plate is arranged at the bottom of the air sweeping box; the air chamber pattern plate is parallel to the material sliding plate; a plurality of air outlets are uniformly formed in the surface of the air chamber pattern plate; and each air outlet is connected with a blowing pipe. Through the arrangement of angles among the upper-layer sieve plate, the material sliding plate and the lower-layer sieve plate, sufficient heat exchange between grains and hot air is ensured, forward throwing force is generated by the grains due to the arrangement of the angles, and the grains are ensured to move forward regularly and orderly; and the grain preheating stability is ensured.

The utility model relates to the technical field of grain processing, in particular to grain drying equipment which comprises a drying cylinder arranged on a support, the drying cylinder is vertically arranged, a feeding port is formed in the top of the drying cylinder, a discharging port is formed in the bottom of the drying cylinder, and the bottom of the drying cylinder communicates with an air supply pipeline; the device further comprises a stirring structure arranged in the center of the drying barrel, a power air cylinder is arranged at the top of the drying barrel, the stirring structure is fixedly connected with the power air cylinder and moves up and down in the drying barrel, a material scattering groove is formed in the drying barrel, and a plurality of material scattering holes are formed in the peripheral side and the bottom of the material scattering groove. The scattering groove is communicated with the feeding port and rotates around the top of the drying cylinder. The grain drying device has the effects of reducing grain accumulation and improving the drying efficiency.