CN110338219B - Electromagnetic heating type grain drying tower - Google Patents
Electromagnetic heating type grain drying tower Download PDFInfo
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- CN110338219B CN110338219B CN201910813630.3A CN201910813630A CN110338219B CN 110338219 B CN110338219 B CN 110338219B CN 201910813630 A CN201910813630 A CN 201910813630A CN 110338219 B CN110338219 B CN 110338219B
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- 238000001035 drying Methods 0.000 title claims abstract description 144
- 238000010438 heat treatment Methods 0.000 title claims abstract description 99
- 239000002245 particle Substances 0.000 claims abstract description 39
- 239000002918 waste heat Substances 0.000 claims abstract description 26
- 238000011084 recovery Methods 0.000 claims abstract description 25
- 230000000694 effects Effects 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 25
- 238000004321 preservation Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims description 2
- 230000003139 buffering effect Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 238000005496 tempering Methods 0.000 description 12
- 210000001503 joint Anatomy 0.000 description 8
- 238000007599 discharging Methods 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/08—Drying; Subsequent reconstitution
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
Abstract
The invention belongs to the technical field of grain drying equipment, and particularly relates to an electromagnetic heating grain drying tower, which adopts an electromagnetic heating mode to dry grain particles by directly heating air, can conveniently realize accurate regulation and control of drying temperature, omits heat loss of intermediate medium heat exchange, simplifies equipment structure, improves grain drying quality, carries out waste heat recovery on the dried grain, saves energy, improves energy utilization efficiency, adopts modularized design for a drying section, an electromagnetic heating section and a waste heat recovery section, is convenient to assemble, provides a personalized collocation scheme according to different drying requirement conditions, has wide application range, and optimizes grain drying efficiency and quality; the drying section, the electromagnetic heating section and the waste heat recovery section are organically overlapped and combined according to different types, different moisture and different purposes of grains, so that the optimal drying effect can be achieved.
Description
Technical field:
the invention belongs to the technical field of grain drying equipment, and particularly relates to an electromagnetic heating grain drying tower which adopts an electromagnetic heating mode to dry grains.
The background technology is as follows:
the loss of grains in the processes of threshing, airing, storing, transporting and the like is up to 15 percent after harvesting, wherein the loss of the grains such as mildew, germination and the like caused by the fact that the wet grains are not dried or the safe moisture is not reached is up to 5 percent due to the fact that the climate is moist. Based on the method, a grain drying technology is developed, the passive situation of eating by the traditional day is changed, and the method has great significance for grain safety guarantee.
The grain drying tower can be divided into cross flow, mixed flow, concurrent flow, countercurrent flow, mixed countercurrent flow, concurrent mixed flow and the like according to the relative motion direction of grains and air flow. The grain drying tower for preventing grain from being burnt comprises a tower body, wherein the tower body comprises a grain storage section, a drying section, a tempering section, a cooling section and a grain discharge section, a central air duct communicated with a hot air pipe outside the tower body is arranged inside the tower body, the tempering Duan Fenge is divided into two tempering chambers which are bilaterally symmetrical by the central air duct, the drying section is divided into two drying chambers which are bilaterally symmetrical by the central air duct, an angle box is arranged in the drying chamber, a plurality of angle box air inlets are arranged on the side wall of the central air duct, an upper end plate and a lower end plate are arranged in the central air duct of the tempering section, the central air duct in the tempering section is sealed into a closed cavity by the upper end plate and the lower end plate, a heat insulation device is arranged on the side wall of the central air duct in the tempering chamber, and the heat insulation device comprises an inner lining plate which fully covers the side wall of the central air duct from the tempering chamber, and a rock wool heat insulation layer is filled between the inner lining plate and the side wall of the central air duct; the grain drying tower with the bidirectional conveying belt conveyor disclosed in the China patent 201721812475.6 comprises a tower body, wherein a lifting device is arranged in the tower body, the bidirectional conveying belt conveyor is further arranged in the tower body, the bidirectional conveying belt conveyor comprises a shell, two ends of the length direction of the shell are respectively provided with a discharge hopper, the discharge end position of one discharge hopper corresponds to the position of the lifting device, the other discharge hopper supplies materials to flow out of the tower body, a charging hole is arranged above the shell, a conveying belt is arranged below the charging hole in the shell, two ends of the conveying direction of the conveying belt correspond to the positions of the corresponding discharge hoppers to convey materials on the conveying belt into the corresponding discharge hoppers, and the bidirectional conveying belt conveyor further comprises a driving machine for driving the conveying belt to move, and the driving machine can bidirectionally rotate to control the conveying direction of the conveying belt; the double-side air inlet grain drying tower disclosed in China patent 201820538549.X comprises a tower body and a hot air main pipe for conveying hot air to the tower body, wherein the tower body comprises a plurality of air inlet joints and a plurality of air outlet joints, a plurality of parallel air inlet angle boxes are arranged in the air inlet joints, a plurality of parallel air outlet angle boxes are arranged in the air outlet joints, the air inlet angle boxes in the air inlet joints are arranged in a layered manner, an upper air inlet angle box and a lower air inlet angle box are arranged in each air inlet joint, an upper air inlet bellows for distributing hot air for the upper air inlet angle box and a lower air inlet bellows for distributing hot air for the lower air inlet angle box are arranged outside the air inlet joints, the upper air inlet bellows and the lower air inlet bellows are respectively positioned on two opposite side walls of the air inlet joints, the air inlet joint side walls corresponding to the air inlet angle boxes are provided with air inlets corresponding to the number, the positions and the section shapes of the air inlet angle boxes, and the air inlet bellows are communicated with the hot air main pipe through branch pipes; the grain drying tower with the lifting device disclosed in Chinese patent 201721812473.7 comprises a tower body and the lifting device, wherein the lifting device comprises a frame fixed on the tower body, two belt pulleys fixed on the frame at intervals up and down and a belt arranged on the periphery of the two belt pulleys, a plurality of grain receiving hoppers with consistent opening orientations are fixed on the outer side surface of the belt pulleys, a driving machine for driving the belt pulleys to rotate and a grain receiving hopper for receiving grains are also fixed on the frame, when the belt pulleys rotate, the winnowing hoppers on the belt pulleys rotate from an opening-up state to a highest point and then are turned into an opening-down state, an opening at the upper end of the grain receiving hopper is positioned below the winnowing hoppers after the opening at the highest point so that grains in the winnowing hoppers can fall into the grain receiving hoppers, a grain discharging pipe with a grain outlet is arranged below the grain receiving hoppers, and a grain discharging pipe inner space is communicated with the grain receiving hopper inner space so that grains in the grain receiving hoppers can flow into the tower body from the grain outlet; the Chinese patent 201720388525.6 discloses a batch type circulating grain drying tower, which comprises a tower body and a circulating elevator, wherein the tower body is sequentially divided into a grain storage section, a grain dividing section, a drying section, a cooling section and a grain discharging section from top to bottom, the upper part of the circulating elevator is connected with a grain inlet of the grain storage section through a grain flowing pipe, the lower part of the circulating elevator is provided with a circulating grain inlet and an external grain inlet, the circulating grain inlet is connected with a grain outlet of the grain discharging section, the drying section consists of a first drying section, a first tempering section, a second drying section and a second tempering section Su Fenduan, a central hot air duct communicated with a hot air pipe is arranged in the middle part of the tower of the drying section, hot air inlets are formed in two side walls of the central hot air duct corresponding to the first drying section and the second drying section, and air inlet angle-shaped boxes corresponding to the hot air inlets are arranged in the first drying section and the second drying section tower body; the grain drying tower disclosed in Chinese patent 201720696644.8 comprises a tower body, wherein a grain storage section, a drying section, a cooling section and a grain discharge section are sequentially arranged on the tower body from top to bottom, the drying section sequentially comprises a high Wen Hunliu drying section, a medium-temperature mixed downstream drying section and a low-temperature countercurrent drying section from top to bottom, the high-temperature mixed downstream drying section is formed by combining a first mixed downstream drying section and a second mixed downstream drying section, the medium-temperature mixed downstream drying section is formed by combining a mixed downstream drying section and a downstream drying section, and the low-temperature countercurrent drying section is formed by combining a first countercurrent drying section and a second countercurrent drying section. In summary, the grain drying tower in the prior art mainly comprises a tower cap, a grain storage section, a drying section, a tempering section, a cooling section, a grain discharging section, a tower seat, a grain elevator, a hot blast stove, temperature control, electric control and the like, wherein raw grains enter a tower side elevator after being screened, and enter the drying tower through the elevator; the grain is firstly subjected to preliminary drying by the tempering section, is further dried by the drying section, is evaporated in original surface moisture, then enters a high-temperature drying stage, is transferred to the outside, is fully dried, and enters a cooling tempering stage, so that the grain enters a grain storage section through a grain discharge section. The main source of heat in the drying process of the grain drying tower is heat released after combustion of coal, natural gas and the like, and in order to avoid pollution of dust and other harmful gases in the flue gas to grains, the high-temperature flue gas after fossil fuel combustion needs to heat air in a heat conduction mode, and the hot air is used for drying grains; the combustion of coal causes environmental pollution, and the supply of natural gas is easily influenced by seasons and external markets; the high-power blower adopted during grain cooling consumes a large amount of electric energy, heat in grains is lost, and in addition, the drying tower in the prior art can cause serious heat loss after heat exchange for many times, so that the efficiency is low. Therefore, a grain drying tower for providing a heat source in a stable, safe and environment-friendly heating mode is urgently needed, and electromagnetic heating has the advantages of high heat efficiency, safety, environment protection, energy conservation, environment protection, easy temperature control and the like, and is one of ideal heating modes.
The invention comprises the following steps:
the invention aims to overcome the defects in the prior art, and designs an electromagnetic heating grain drying tower to optimize the quality and efficiency of grain drying.
In order to achieve the above purpose, the main structure of the electromagnetic heating grain drying tower comprises a lifting machine, a raw grain inlet, a raw grain outlet, a rotary distributor, a drying section, an electromagnetic heating section, a waste heat recovery section, an airflow generation section, a dry grain outlet and a bracket; one end of lifting machine is provided with the former grain entry, and the other end of lifting machine is provided with the former grain export, and the below of former grain export is provided with rotatory distributor, and rotatory distributor's bottom is connected with the dry section, and the bottom of dry section is connected with electromagnetic heating section, and electromagnetic heating section's bottom is connected with waste heat recovery section, and waste heat recovery section's bottom is connected with the air current section of taking place, and the air current takes place the bottom of section and the dry grain exit linkage of funnel-shaped structure, the lateral wall and the setting of dry grain export are at subaerial leg joint.
The main body structure of the rotary distributor comprises a distributor cylinder body, a motor, a first coupling, a distributor disc and a groove; the inside of the distributor barrel body with the circular structure is provided with a motor, the motor is connected with a distribution disc with a truncated cone-shaped structure through a first coupling, and radial grooves are formed in the distribution disc at equal intervals.
The main body structure of the drying section comprises an outer cylinder of the drying section, a first heat-preserving layer, an inner cylinder of the drying section, a first upper connecting rod, a first lower connecting rod, a first buffer box, a first upper plugging disc and a first lower plugging disc; the outer side wall of the drying section outer cylinder of the circular structure is surrounded by a first heat preservation layer, the inside of the drying section outer cylinder is provided with a drying section inner cylinder of the circular structure, the top and bottom of the drying section outer cylinder and the drying section inner cylinder are respectively connected through a first upper connecting rod and a first lower connecting rod, first buffer boxes are arranged on the inner wall of the drying section outer cylinder and the outer side wall of the drying section inner cylinder, the top and bottom of the drying section inner cylinder are respectively sealed by a first upper sealing disc and a first lower sealing disc, and grain particles are prevented from entering the drying section inner cylinder.
The main body structure of the electromagnetic heating section comprises a heating section outer cylinder, an electromagnetic coil, a second heat insulation layer, a heating section inner cylinder, a second upper connecting rod, a second lower connecting rod, a second buffer box, a second upper plugging disc and a second lower plugging disc; the outer side wall of the heating section outer barrel of the circular structure is provided with an electromagnetic coil except for the top end and the bottom end periphery, the outer side wall top end and the bottom end of the heating section outer barrel and the outer side periphery of the electromagnetic coil are provided with a second heat preservation layer, the inside of the heating section outer barrel is provided with a heating section inner barrel of the circular structure, the heating section outer barrel and the top end and the bottom end of the heating section inner barrel are respectively connected through a second upper connecting rod and a second lower connecting rod, the upper end of the inner side wall of the heating section outer barrel is provided with a second buffer box, and the top end and the bottom end of the heating section inner barrel are respectively sealed by a second upper sealing disc and a second lower sealing disc, so that grain particles are prevented from entering the heating section inner barrel.
The main body structure of the airflow generation section comprises an airflow generation section outer cylinder, a third heat preservation layer, an airflow generation section inner cylinder, a fan sleeve, a third upper connecting rod, a third lower connecting rod, a third buffer box, a third upper sealing disc, a lower fixing disc, a high-speed motor, a second connecting shaft and a turbofan; the outer side wall of the air flow generation section outer cylinder of the circular structure is surrounded by a third heat preservation layer, the upper end in the air flow generation section outer cylinder is provided with an air flow generation section inner cylinder of which the upper end is of a circular structure and the lower end is of a conical structure, a fan sleeve of the circular structure is arranged at the lower part in the air flow generation section outer cylinder, the air flow generation section outer cylinder is connected with the top end of the air flow generation section inner cylinder through a third upper connecting rod, the air flow generation section outer cylinder is connected with the bottom end of the fan sleeve through a third lower connecting rod, a third buffer box is arranged on the outer side wall of the air flow generation section inner cylinder, the top end of the air flow generation section inner cylinder is sealed by a third upper sealing disc, grain particles are prevented from entering the air flow generation section inner cylinder, a lower fixing disc is arranged at the bottom end of the fan sleeve, and a high-speed motor is arranged on the lower fixing disc and is connected with a turbofan through a second connecting shaft.
The height of the elevator can be adjusted; the drying section, the electromagnetic heating section and the waste heat recovery section are integers more than or equal to 1, the drying section can be arranged in groups with the electromagnetic heating section or used in a superposition way according to the requirement of increasing the moisture volatilization time of grain particles, the main structure of the drying section is the same as that of the waste heat recovery section, the electromagnetic heating section heats the air flow at a set temperature, so that the grain particles are fully dried in the drying section, and the waste heat recovery section carries out cooling heat exchange on the dried grain particles, so that the grain particles reach the storage temperature and the waste heat is recovered, thereby saving energy; the bracket is used for supporting the rotary distributor, the drying section, the electromagnetic heating section, the waste heat recovery section, the airflow generation section and the dry grain outlet and enabling the rotary distributor, the drying section, the electromagnetic heating section, the waste heat recovery section, the airflow generation section and the dry grain outlet to be in an upright state all the time.
When the electromagnetic heating grain drying tower is used, grain particles enter a lifting machine from a raw grain inlet to be lifted to a raw grain outlet to fall freely, are uniformly distributed along the circumferential direction under the action of a rotary distributor, enter a drying section and fully contact with hot air in the process of buffering and falling, moisture on the surface layer of the grain particles is dried and falls continuously, the electromagnetic heating section heats the air, the moisture on the surface layer of the grain particles is deeply dried and falls continuously when passing through the electromagnetic heating section, the grain particles enter a waste heat recovery section to buffer and fall, fully contact with cold air flow provided by the lower part for heat exchange, the cold air flow is heated while the grain particles are cooled, the heat energy utilization rate is improved, and the cooled grain particles are discharged through a dry grain outlet after passing through the air flow generation section.
Compared with the prior art, the invention adopts an electromagnetic heating mode to directly heat air, can conveniently realize accurate regulation and control of drying temperature, omits heat loss of intermediate heat exchange, simplifies equipment structure, improves grain drying quality, performs waste heat recovery on dried grains, saves energy sources, improves energy utilization efficiency, adopts modularized design for a drying section, an electromagnetic heating section and a waste heat recovery section, is convenient to assemble, provides a personalized collocation scheme according to different drying requirement conditions, has wide application range, and ensures that grain drying efficiency and quality are optimized; the drying section, the electromagnetic heating section and the waste heat recovery section are organically overlapped and combined according to different types, different moisture and different purposes of grains, so that the optimal drying effect can be achieved.
Description of the drawings:
fig. 1 is a schematic diagram of the principle of the main structure of the present invention.
Fig. 2 is a schematic structural view of a rotary distributor according to the present invention.
Fig. 3 is a schematic structural view of a drying section according to the present invention.
Fig. 4 is a schematic diagram of the connection relationship between the outer cylinder and the inner cylinder of the drying section according to the present invention.
Fig. 5 is a schematic structural view of a first buffer box with an arc structure according to the present invention.
Fig. 6 is a schematic structural view of an electromagnetic heating section according to the present invention.
Fig. 7 is a schematic structural view of an airflow generation segment according to the present invention.
The specific embodiment is as follows:
the invention is further described below by way of examples and with reference to the accompanying drawings.
Example 1:
the main body structure of the electromagnetic heating grain drying tower related to the embodiment comprises a lifting machine 1, a raw grain inlet 2, a raw grain outlet 3, a rotary distributor 4, a drying section 5, an electromagnetic heating section 6, a waste heat recovery section 7, an airflow generation section 8, a dry grain outlet 9 and a bracket 10; one end of the lifting machine 1 is provided with a raw grain inlet 2, the other end of the lifting machine 1 is provided with a raw grain outlet 3, a rotary distributor 4 is arranged below the raw grain outlet 3, the bottom of the rotary distributor 4 is connected with a drying section 5, the bottom of the drying section 5 is connected with an electromagnetic heating section 6, the bottom of the electromagnetic heating section 6 is connected with a waste heat recovery section 7, the bottom of the waste heat recovery section 7 is connected with an air flow generation section 8, the bottom of the air flow generation section 8 is connected with a dry grain outlet 9 of a funnel-shaped structure, and the outer side wall of the dry grain outlet 9 is connected with a bracket 10 arranged on the ground; the main structure of the rotary distributor 4 comprises a distributor cylinder 40, a motor 41, a first coupling 42, a distributor disk 43 and a groove 44; the inside of the distributor barrel 40 with a circular structure is provided with a motor 41, the motor 41 is connected with a distribution disc 43 with a truncated cone structure through a first coupling 42, and radial grooves 44 are arranged on the distribution disc 43 at equal intervals; the main structure of the drying section 5 comprises a drying section outer cylinder 50, a first heat-preserving layer 51, a drying section inner cylinder 52, a first upper connecting rod 53, a first lower connecting rod 54, a first buffer box 55, a first upper sealing disc 56 and a first lower sealing disc 57; the outer side wall of the drying section outer cylinder 50 with a circular structure is surrounded by a first heat preservation layer 51, a drying section inner cylinder 52 with a circular structure is arranged in the drying section outer cylinder 50, the drying section outer cylinder 50 is connected with the top end and the bottom end of the drying section inner cylinder 52 through a first upper connecting rod 53 and a first lower connecting rod 54 respectively, a first buffer box 55 is arranged on the inner wall of the drying section outer cylinder 50 and the outer side wall of the drying section inner cylinder 52, and the top end and the bottom end of the drying section inner cylinder 52 are sealed by a first upper sealing disc 56 and a first lower sealing disc 57 respectively, so that grain particles are prevented from entering the drying section inner cylinder 52; the main structure of the electromagnetic heating section 6 comprises a heating section outer cylinder 60, an electromagnetic coil 61, a second heat insulation layer 62, a heating section inner cylinder 63, a second upper connecting rod 64, a second lower connecting rod 65, a second buffer box 66, a second upper plugging disc 67 and a second lower plugging disc 68; the outer side wall of the heating section outer cylinder 60 with a circular structure is provided with an electromagnetic coil 61 except the top end and the bottom end, the top end and the bottom end of the outer side wall of the heating section outer cylinder 60 and the outer side of the electromagnetic coil 61 are provided with a second heat preservation layer 62, the inside of the heating section outer cylinder 60 is provided with a heating section inner cylinder 63 with a circular structure, the heating section outer cylinder 60 and the top end and the bottom end of the heating section inner cylinder 63 are respectively connected through a second upper connecting rod 64 and a second lower connecting rod 65, the upper end of the inner side wall of the heating section outer cylinder 60 is provided with a second buffer box 66, and the top end and the bottom end of the heating section inner cylinder 63 are respectively sealed by a second upper sealing disc 67 and a second lower sealing disc 68, so that grain particles are prevented from entering the heating section inner cylinder 63; the main structure of the airflow generating section 8 comprises an airflow generating section outer cylinder 80, a third heat insulating layer 81, an airflow generating section inner cylinder 82, a fan sleeve 83, a third upper connecting rod 84, a third lower connecting rod 85, a third buffer box 86, a third upper plugging disc 87, a lower fixing disc 88, a high-speed motor 89, a second connecting shaft 90 and a turbofan 91; the outer side wall of the air flow generation section outer cylinder 80 with a circular structure is surrounded by a third heat preservation layer 81, the upper part in the air flow generation section outer cylinder 80 is provided with an air flow generation section inner cylinder 82 with a circular structure at the upper end and a conical structure at the lower end, a fan sleeve 83 with a circular structure is arranged at the lower part in the air flow generation section outer cylinder 80, the air flow generation section outer cylinder 80 is connected with the top end of the air flow generation section inner cylinder 82 through a third upper connecting rod 84, the air flow generation section outer cylinder 80 is connected with the bottom end of the fan sleeve 83 through a third lower connecting rod 85, a third buffer box 86 is arranged on the outer side wall of the air flow generation section inner cylinder 82, the top end of the air flow generation section inner cylinder 82 is sealed by a third upper sealing disc 87, grain particles are prevented from entering the air flow generation section inner cylinder 82, a lower fixing disc 88 is arranged at the bottom end of the fan sleeve 83, a high-speed motor 89 is arranged on the lower fixing disc 88, and the high-speed motor 89 is connected with a turbofan 91 through a second connecting shaft 90.
The number of the drying section 5, the electromagnetic heating section 6 and the waste heat recovery section 7 involved in this embodiment is 2.
The distribution plate 43 according to the embodiment is driven by the motor 41 to rotate, so that grain particles are uniformly distributed along the circumferential direction; the inner diameters and the outer diameters of the drying section outer cylinder 50, the heating section outer cylinder 60 and the air flow generation section outer cylinder 80 are equal, the inner diameters and the outer diameters of the drying section inner cylinder 52, the heating section inner cylinder 63 and the air flow generation section inner cylinder 82 are equal, and annular areas between the drying section outer cylinder 50 and the drying section inner cylinder 52, the heating section outer cylinder 60 and the heating section inner cylinder 63, and between the air flow generation section outer cylinder 80 and the air flow generation section inner cylinder 82 and the fan sleeve 83 are places where grain particles freely fall; the first heat preservation layer 51, the second heat preservation layer 62 and the third heat preservation layer 81 all have the functions of heat insulation and heat preservation, and prevent heat dissipation; the first buffer box 55, the second buffer box 66 and the third buffer box 86 are all formed by bending net materials, ventilation capacity can be increased, drying or cooling effect is improved, the inside is of a hollow or solid structure and is of an annular structure, the cross section of the first buffer box 55, the second buffer box 66 and the third buffer box 86 is triangular or circular arc, grain particles are guided and buffered, the first buffer box 55 enables the grain particles to be fully contacted with hot air for drying in the process of slowly and uniformly descending, the second buffer box 66 enables the grain particles to fall along the outer side wall of the inner cylinder 63 of the heating section, contact with the inner side wall of the outer cylinder 60 of the heating section is prevented, and the third buffer box 86 enables the grain particles to fall along the inner side wall of the outer cylinder 80 of the airflow generating section and prevented from falling into the turbofan 91; the electromagnetic coil 61 is connected with an external electromagnetic heater to generate a high-frequency alternating magnetic field, and the iron heating section outer cylinder 60 cuts alternating magnetic lines to generate heat energy so as to heat air flow in an annular area between the heating section outer cylinder 60 and the heating section inner cylinder 63; the lower fixing plate 88 is of a net structure, so that air can conveniently enter from the lower part of the lower fixing plate; the high-speed motor 89 rotates to drive the turbofan 91 to rotate so as to generate upward airflow, and the lower end of the inner cylinder 82 of the airflow generation section guides the airflow, so that the airflow is uniformly distributed along the circumferential annular area and flows upwards.
Claims (4)
1. An electromagnetic heating grain drying tower, which comprises a lifting machine, a raw grain inlet, a raw grain outlet, a rotary distributor, a drying section, an electromagnetic heating section, a waste heat recovery section, an airflow generation section, a dry grain outlet and a bracket, wherein the main structure of the electromagnetic heating grain drying tower comprises a lifting machine, a raw grain inlet, a raw grain outlet, a rotary distributor, a drying section, an electromagnetic heating section, a waste heat recovery section, an airflow generation section, a dry grain outlet and a bracket; the device is characterized in that a raw grain inlet is formed in one end of a lifting machine, a raw grain outlet is formed in the other end of the lifting machine, a rotary distributor is arranged below the raw grain outlet, the bottom of the rotary distributor is connected with a drying section, the bottom of the drying section is connected with an electromagnetic heating section, the bottom of the electromagnetic heating section is connected with a waste heat recovery section, the bottom of the waste heat recovery section is connected with an airflow generation section, the bottom of the airflow generation section is connected with a dry grain outlet of a funnel-shaped structure, and the outer side wall of the dry grain outlet is connected with a support arranged on the ground; the main structure of the drying section comprises an outer cylinder of the drying section, a first heat-preserving layer, an inner cylinder of the drying section, a first upper connecting rod, a first lower connecting rod, a first buffer box, a first upper plugging disc and a first lower plugging disc; the outer side wall of the drying section outer cylinder with the circular structure is surrounded by a first heat preservation layer, a drying section inner cylinder with the circular structure is arranged in the drying section outer cylinder, the top end and the bottom end of the drying section outer cylinder are respectively connected with the top end and the bottom end of the drying section inner cylinder through a first upper connecting rod and a first lower connecting rod, first buffer boxes are arranged on the inner wall of the drying section outer cylinder and the outer side wall of the drying section inner cylinder, and the top end and the bottom end of the drying section inner cylinder are respectively sealed by a first upper sealing disc and a first lower sealing disc to prevent grain particles from entering the drying section inner cylinder; the main structure of the electromagnetic heating section comprises a heating section outer cylinder, an electromagnetic coil, a second heat preservation layer, a heating section inner cylinder, a second upper connecting rod, a second lower connecting rod, a second buffer box, a second upper plugging disc and a second lower plugging disc; the outer side wall of the heating section outer cylinder with the circular structure is provided with electromagnetic coils except the top end and the bottom end, the top end and the bottom end of the outer side wall of the heating section outer cylinder and the outer side periphery of the electromagnetic coils are provided with second heat preservation layers, the heating section inner cylinder with the circular structure is arranged in the heating section outer cylinder, the heating section outer cylinder is connected with the top end and the bottom end of the heating section inner cylinder through a second upper connecting rod and a second lower connecting rod respectively, the upper end of the inner side wall of the heating section outer cylinder is provided with a second buffer box, and the top end and the bottom end of the heating section inner cylinder are sealed by a second upper sealing disc and a second lower sealing disc respectively, so that grain particles are prevented from entering the heating section inner cylinder; the main structure of the airflow generation section comprises an airflow generation section outer cylinder, a third heat preservation layer, an airflow generation section inner cylinder, a fan sleeve, a third upper connecting rod, a third lower connecting rod, a third buffer box, a third upper plugging disc, a lower fixing disc, a high-speed motor, a second coupling and a turbofan; the outer side wall of the air flow generation section outer cylinder with a circular structure is surrounded by a third heat preservation layer, the upper end of the inner upper part of the air flow generation section outer cylinder is provided with an air flow generation section inner cylinder with a circular structure, the lower end of the inner lower part of the air flow generation section outer cylinder is provided with a fan sleeve with a circular structure, the top end of the air flow generation section outer cylinder is connected with the top end of the air flow generation section inner cylinder through a third upper connecting rod, the air flow generation section outer cylinder is connected with the bottom end of the fan sleeve through a third lower connecting rod, the outer side wall of the air flow generation section inner cylinder is provided with a third buffer box, the top end of the air flow generation section inner cylinder is sealed by a third upper sealing disc, grain particles are prevented from entering the air flow generation section inner cylinder, the bottom end of the fan sleeve is provided with a lower fixing disc, and a high-speed motor is arranged on the lower fixing disc and is connected with a turbofan through a second coupling; the main body structure of the drying section is the same as that of the waste heat recovery section.
2. The electromagnetic heating type grain drying tower according to claim 1, wherein the main structure of the rotary distributor comprises a distributor cylinder, a motor, a first coupling, a distributor disc and a groove; the inside of the distributor barrel body with the circular structure is provided with a motor, the motor is connected with a distribution disc with a truncated cone-shaped structure through a first coupling, and radial grooves are formed in the distribution disc at equal intervals.
3. The electromagnetic heating type grain drying tower according to claim 2, wherein the distribution plate is driven by the motor to rotate, so that grain particles are uniformly distributed along the circumferential direction; the inner diameters and the outer diameters of the drying section outer cylinder, the heating section outer cylinder and the air flow generation section outer cylinder are equal, the inner diameters and the outer diameters of the drying section inner cylinder, the heating section inner cylinder and the air flow generation section inner cylinder are equal, and annular areas among the drying section outer cylinder, the drying section inner cylinder, the heating section outer cylinder, the heating section inner cylinder, the air flow generation section outer cylinder, the air flow generation section inner cylinder and the fan sleeve are places where grain particles freely fall; the first heat preservation layer, the second heat preservation layer and the third heat preservation layer have the functions of heat insulation and heat preservation, and heat dissipation is prevented; the first buffer box, the second buffer box and the third buffer box are all formed by bending net materials, ventilation capacity can be increased, drying or cooling effect is improved, the inside of the first buffer box is of a hollow or solid structure and is of an annular structure, the cross section of the first buffer box is triangular or circular arc, grain particles are guided and buffered by the first buffer box, the second buffer box and the third buffer box, the grain particles are fully contacted with hot air for drying in the process of slowly and uniformly descending by the first buffer box, the grain particles fall along the outer side wall of the inner cylinder of the heating section to be prevented from contacting with the inner side wall of the outer cylinder of the hotter heating section, and the grain particles fall along the inner side wall of the outer cylinder of the airflow generating section to be prevented from falling into the turbofan by the third buffer box; the electromagnetic coil is connected with an external electromagnetic heater to generate a high-frequency alternating magnetic field, and the iron heating section outer cylinder cuts alternating magnetic lines to generate heat energy so as to heat air flow in an annular area between the heating section outer cylinder and the heating section inner cylinder; the lower fixing disc is of a net structure, so that air can conveniently enter from the lower part of the lower fixing disc; the high-speed motor drives the turbofan to rotate to generate upward flowing air flow, and the lower end of the inner cylinder of the air flow generation section guides the air flow, so that the air flow is uniformly distributed along the circumferential annular area and flows upward.
4. An electromagnetic heating grain drying tower according to any one of claims 1-3, wherein in use, grain particles enter a lifting machine from a raw grain inlet to be lifted to a raw grain outlet to fall freely, are evenly distributed along the circumferential direction under the action of a rotary distributor, enter a drying section, fully contact with hot air in the process of buffering and falling, moisture on the surface layer of the grain particles is dried and continuously falls, the electromagnetic heating section heats air, the moisture on the surface layer of the grain particles is deeply dried when passing through the electromagnetic heating section and continuously falls, the grain particles enter a waste heat recovery section to buffer and fall, the grain particles are fully contacted with cold air flow provided at the lower part for heat exchange, the cold air flow is heated while the grain particles are cooled, the heat energy utilization rate is improved, and the cooled grain particles are discharged through a dry grain outlet after passing through an air flow generating section.
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|---|---|---|---|---|
| CN205066370U (en) * | 2015-10-20 | 2016-03-02 | 成都市农林科学院 | Oil grain crop drying device |
| CN105758153A (en) * | 2016-05-11 | 2016-07-13 | 江西省鑫纬业环保设备制造有限公司 | Continuous grain drying machine with electromagnetic high-frequency heating function |
| CN207702937U (en) * | 2017-12-26 | 2018-08-07 | 山东鑫达能源科技有限公司 | The hot foodstuff drying device of heat reclamation type magnetic |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205066370U (en) * | 2015-10-20 | 2016-03-02 | 成都市农林科学院 | Oil grain crop drying device |
| CN105758153A (en) * | 2016-05-11 | 2016-07-13 | 江西省鑫纬业环保设备制造有限公司 | Continuous grain drying machine with electromagnetic high-frequency heating function |
| CN207702937U (en) * | 2017-12-26 | 2018-08-07 | 山东鑫达能源科技有限公司 | The hot foodstuff drying device of heat reclamation type magnetic |
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