CN112524927A

CN112524927A - Rice air-drying device

Info

Publication number: CN112524927A
Application number: CN202011571040.3A
Authority: CN
Inventors: 陈道久
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-27
Filing date: 2020-12-27
Publication date: 2021-03-19

Abstract

The invention discloses a rice air-drying device, which comprises an air source heat pump, a preheating cavity and an air-drying cavity: a conveying belt group for conveying the unhulled rice is arranged in the air drying cavity, the unhulled rice enters the conveying belt group of the air drying cavity through the preheating cavity, the conveying belt group consists of a plurality of layers of vertically distributed conveying belts, and the feeding end of the lower layer of conveying belt is connected with the blanking end of the upper layer of conveying belt; the condenser of the air source heat pump is connected with an air inlet of the air drying cavity to supply hot air to the air drying cavity, and an air outlet of the air drying cavity is communicated with the preheating cavity. A production line type rice drying mode is adopted, and quantitative drying is not needed; the drying efficiency is effectively improved; is beneficial to keeping the taste of the rice; preheating the paddy by fully utilizing the waste heat of the hot air; the working energy of the heat pump is fully and effectively utilized.

Description

Rice air-drying device

Technical Field

The invention relates to equipment for drying rice.

Background

The moisture content of the rice has a great influence on the processing of polished rice, so the harvested rice needs to be dried. The rice water to be removed includes internal water which is a constituent of rice, and the removal is difficult. In the traditional mode, the harvested paddy needs to be dried for about one day and then exposed for about two days. The existing rice drying equipment comprises a drying tower fixedly arranged, rice is fed into the drying tower for one time and is continuously stirred, and the rice is discharged for one time after being dried. The main disadvantages are that:

firstly, the existing rice drying equipment needs to dry quantitatively according to the designed capacity, such as drying 10 tons, 20 tons, 30 tons and the like at one time, otherwise, the drying cost is increased. Therefore, in practice, rice of multiple farmers is often required to be mixed in one batch for drying. However, the rice varieties of each farmer are different, the soil conditions are different, the planting modes such as fertilization and weeding are different, so that the harvested rice is different in quality, the rice of multiple farmers cannot be distinguished after being mixed and dried, the farmers are unwilling to use the rice, and the application of equipment is seriously influenced.

Secondly, the drying period required by the existing rice drying equipment is 12-24 hours, and the time is too long; moreover, moisture removed from the rice is in a saturated state in the air in the drying tower and is easy to contact with the rice again to be condensed and release heat, and the rice is repeatedly heated, so that the taste of the rice is influenced.

Disclosure of Invention

In order to solve the defects, the invention aims to provide the rice air drying device which does not need quantitative drying, so that the drying period is effectively shortened, and the taste of the rice is not influenced in the drying process. In order to solve the technical problems, the invention adopts the technical scheme that the air drying device for the rice is characterized by comprising an air source heat pump, a preheating cavity and an air drying cavity: a conveying belt group for conveying the unhulled rice is arranged in the air drying cavity, the unhulled rice enters the conveying belt group of the air drying cavity through the preheating cavity, the conveying belt group consists of a plurality of layers of vertically distributed conveying belts, and the feeding end of the lower layer of conveying belt is connected with the blanking end of the upper layer of conveying belt; the condenser of the air source heat pump is connected with an air inlet of the air drying cavity to supply hot air to the air drying cavity, and an air outlet of the air drying cavity is communicated with the preheating cavity.

The invention has the beneficial effects that the technical scheme adopts a production line type rice drying mode, and quantitative drying is not needed; the paddy moves along with the conveying belt in the air drying cavity, and the paddy continuously rolls and reverses in the process of falling layer by layer, and is fully and uniformly contacted with hot air, so that the moisture in the paddy is easy to drop, and the drying efficiency is effectively improved; the residence time of the paddy in the air drying cavity is short, and the air outlet of the air drying cavity plays a role in moisture removal, so that the saturation of water in the air of the air drying cavity and the re-contact condensation of the paddy to release heat to heat the paddy can be avoided, and the taste of the paddy is kept; the air outlet of the air drying cavity is communicated with the preheating cavity, and hot air passes through the air drying cavity and then enters the preheating cavity with a large amount of waste heat, so that the rice is preheated by fully utilizing the waste heat of the hot air. Meanwhile, the device is convenient for adjusting the water content of the finished rice product.

Preferably, a vibrating screen is connected below the feed inlet of the preheating cavity, and the discharging end of the vibrating screen is connected with the feed end of the conveyor belt group. Effectively remove the impurities in the paddy.

Preferably, the conveyor belt is provided with a rice scraping member. When the conveying belt bears the rice and the rice passes through, the rice leveling piece enables the rice to be flatly spread on the conveying belt. The rice scraping member is preferably disposed adjacent to the feed end of the conveyor belt assembly.

Preferably, the discharging end of the vibrating screen is connected with the conveying belt group through a first rice lifting machine.

Preferably, the rice air-drying device further comprises a cooling cavity, and the discharge end of the conveyor belt group is connected with the cooling cavity. Can send into the mode reduction stoving corn of cooling air through the fan to shorten the cooling time and be convenient for pack the transportation and store.

Furthermore, the evaporator of the air source heat pump is communicated with the air inlet of the cooling cavity to supply cooling air to the cooling cavity. In the preferred scheme, the work of the air source heat pump is utilized in two directions: firstly, the external air is heated by heat absorbed in the evaporator, so that the condenser can provide hot air to the air drying cavity as a drying heat source; meanwhile, the temperature and the moisture of the air with heat absorbed are reduced to form dry and cold air, and the dry and cold air is fully utilized to supply the cooling cavity to cool the paddy. The working energy of the heat pump is fully and effectively utilized.

Furthermore, a blighted grain winnowing mechanism is arranged in the cooling cavity and is used for winnowing the blighted grains by using cooling air. The blighted grain winnowing is completed and the cooling efficiency is improved.

Furthermore, the blighted grain winnowing mechanism comprises a winnowing conveying belt for receiving a feeding hole of the cooling cavity, a rice guide plate is arranged below the winnowing conveying belt, an air guide cone is arranged on one side below the rice guide plate, a rice diversion inclined plate is arranged on the opposite side of the air guide cone, the lower end of the rice diversion inclined plate is received by a finished product rice discharging hole, and the upper end of the rice diversion inclined plate is received by a blighted grain discharging hole. The rice is fully cooled by the cold air filled in the cooling cavity while the blighted rice is winnowed with high quality.

Furthermore, a material separating table for receiving a feed inlet of the cooling cavity is arranged above the winnowing conveyor belt, fan covers are arranged above and at two sides of the material separating table, a falling channel is formed between two sides of the material separating table and the fan covers, and the winnowing conveyor belt is used for receiving the lower part of the falling channel. The unhusked rice falls onto the material separating platform and falls onto the air separation conveying belt below from unhusked rice falling channels on two sides of the material separating platform. In the process, the paddy is fully cooled by the cold air filled in the process; the rice is distributed more evenly on the winnowing conveyor belt, and cooling and winnowing are also facilitated.

Preferably, the feed inlet of the cooling cavity is connected with the conveyor belt group through a second rice lifting machine

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or "coupled" to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Drawings

FIG. 1 is a schematic structural view of the appearance of embodiment 1;

FIG. 2 is a schematic view of the internal structure of embodiment 1;

example 1 description of reference numerals: 1. a load-bearing vehicle; 2. a preheating chamber; 3. a feed inlet; 4. an air-drying cavity; 5. a cooling chamber; 6. a discharge port; 7. an air source heat pump; 8. vibrating screen; 9. an exhaust fan; 10. a conveyor belt; 11. an air duct; 12. blighted grain storage bin; 13. a partition plate; 14. an blighted grain outlet; 15. a winnowing machine; 16. a condenser; 17. an evaporator; 18. a condenser fan (simultaneously supplies air to the air drying cavity); 19. an evaporator fan (which simultaneously supplies air to the air duct 11); 20. the corn is scraped the piece.

FIG. 3 is a schematic structural view of the embodiment 2;

FIG. 4 is a partial perspective view of the first embodiment 2;

FIG. 5 is a partial perspective view of the second embodiment 2;

fig. 6 is a schematic partial perspective structural view three of embodiment 2.

Example 1: referring to fig. 1-2, a specific configuration of the present invention is reflected. The corn air-drying device is arranged on the bearing vehicle 1 so as to be convenient to move for peasant household to serve.

The device comprises an air source heat pump 7 consisting of a condenser 16 and an evaporator 17, and also comprises a preheating cavity 2, an air drying cavity 4 and a cooling cavity 5. And a vibrating screen 8 for removing impurities in the rice is connected below the feed inlet 3 of the preheating cavity 2. The conveying belt group for conveying the unhusked rice is arranged in the air drying cavity 4, the unhusked rice enters the conveying belt group of the air drying cavity 4 through the preheating cavity 2, the conveying belt group is composed of nine layers of conveying belts 10 distributed up and down, the feeding end of the lower layer of conveying belt 10 is connected with the blanking end of the upper layer of conveying belt 10, as shown in fig. 2, the blanking end of the vibrating screen 8 is connected with the feeding end of the highest layer of conveying belt 10 (namely the feeding end of the conveying belt group), the unhusked rice is conveyed to the blanking end of the highest layer of conveying belt 10 from left to right, falls to the feeding end of the second layer of conveying belt (on the right side), is conveyed to … from right to left, and is circulated and reciprocated in sequence, so that the nine layers of conveying belts 10 form a rice conveying. A production line type rice drying mode is adopted, and quantitative drying is not needed; corn removes along with the conveyer belt in air-drying the intracavity, and corn constantly rolls the switching-over at the in-process that the successive layer falls, and it is abundant even with hot-blast contact, and moisture in the corn is deviate from easily, effectively improves drying efficiency.

A rice scraping element 20 is provided near the feed end of the set of belts. The paddy scraping member 20 allows the paddy to be spread on the conveyor belt 10 while the conveyor belt 10 carries the paddy therethrough.

The condenser 16 of the air source heat pump 7 is communicated with the air inlet of the air drying cavity 4, hot air is supplied to the air drying cavity 4 by using the condenser fan 18, the air outlet of the air drying cavity 4 is communicated with the preheating cavity 2, the hot air in the air drying cavity 4 is sent into the preheating cavity 2 through the exhaust fan 9 to play a role in dehumidifying, the phenomenon that moisture in air in the air drying cavity is saturated and rice is contacted with condensation again to release heat to heat the rice is avoided, and the taste of the rice is kept; after passing through the air drying cavity 4, the hot air has a temperature which is reduced to some extent, but still has a large amount of waste heat to enter the preheating cavity 2, so that the waste heat of the hot air is fully utilized to preheat the paddy and quickly air-dry the surface moisture of the paddy.

In other embodiments, the drying process can be accomplished to the dry chamber of delivery belt group corn air-out 4 after will heating drying, but the corn temperature is higher this moment, can pack the transportation and store after needing certain time to cool off. In this embodiment, the rice air-drying device further comprises a cooling cavity 5, the discharge end of the conveyor belt set is connected with the cooling cavity 5, and the heated and dried rice is conveyed into the cooling cavity 5 by the conveyor belt set. In this example, the evaporator 17 supplies cooling air to the cooling chamber 5 through the evaporator fan 19 and the duct 11. The air in the environment is absorbed with heat and reduces the moisture in the evaporator, and the dry and cold air is fully utilized to cool the paddy. In other embodiments, the temperature of the dried rice can be reduced by sending cooling air to the fan, so that the cooling time is shortened, and the rice is convenient to package, transport and store.

In this example, a winnowing machine 15 for blighted grains is arranged in the cooling cavity 5, the blighted grains are winnowed by cooling air fed by the air pipe 11, the cooling cavity 5 is divided into a blighted grain storage bin 12 and a lower bin by a partition plate 13, the blighted grains are fed into the blighted grain storage bin 12 from a blighted grain outlet 14, and the finished rice is discharged through the discharge port 6. The blighted grain winnowing is completed and the cooling efficiency is improved.

Example 2: referring to fig. 3-6, another embodiment of the present invention is shown. The rice air drying device comprises an air source heat pump 103, a preheating cavity 102, an air drying cavity 110 and a cooling cavity 108. A vibrating screen 115 for removing impurities in the rice is received below the feeding port 101 of the preheating cavity 102. The rice is connected to the set of conveyors by undersize chutes 116 and a first rice elevator 112. The pre-heated air fed by the pressurized exhaust fan 114 blows the impurities out of the preheating chamber 102 through the impurity discharging window 117.

A conveying belt group for conveying the unhulled rice is arranged in the air drying cavity 110, the unhulled rice enters the conveying belt group of the air drying cavity 110 after passing through the preheating cavity 102, the conveying belt group consists of fifteen layers of vertically distributed conveying belts 104, and similar to the embodiment 1, the fifteen layers of conveying belts 104 form a rice conveying channel which is connected in series. A rice scraping member (not shown) may also be provided near the feed end of the set of belts.

Similar to embodiment 1, the condenser of the air source heat pump 103 supplies hot air into the air drying chamber 110, and the air outlet box 111 of the air drying chamber 4 is communicated with the preheating chamber 102 through the air duct 113 and the pressurizing exhaust fan 114 thereof, so as to perform the functions of moisture removal, preheating, impurity removal and the like.

In this example, the cooling chamber 108 is also included, and the discharge end of the conveyor belt group feeds the heated and dried rice into the cooling chamber 108 by the second rice elevator 109. Similar to the embodiment 1, the evaporator supplies cooling air to the cooling cavity 108 through the evaporator fan and the air pipe 118, and air separation is carried out on blighted grains by using the cooling air sent by the air pipe 118, so that the cooling efficiency is improved while the blighted grains are air separated.

Different from the embodiment 1, in this embodiment, the blighted grain winnowing mechanism includes a winnowing conveyer belt 119, a material separating table 125 for receiving the feeding port of the cooling chamber 108 is provided above the winnowing conveyer belt 119, a wind cover 126 is provided above and on both sides of the material separating table 125, a falling channel 124 is formed between both sides of the material separating table 125 and the wind cover 126, and the falling channel 124 is received by the winnowing conveyer belt 119. The paddy fed by the second paddy elevator 109 falls onto the material separating table 125, and falls onto the air separation conveyer belt 119 below from the paddy falling passages 124 on both sides of the material separating table 125. In the process, the paddy is fully cooled by the cold air in the filling air hood 126; the more even distribution of the rice on the winnowing conveyor 119 is also advantageous for cooling and winnowing.

A corn guide plate 123 is arranged below the winnowing conveyor belt 119, an air guide cone 121 is arranged on one side below the corn guide plate 123, the air guide cone 121 is correspondingly provided with a booster fan 120, and the booster fan 120 is communicated with the air pipe 118. The opposite side of the air guide cone 121 is provided with a rice flow distribution sloping plate 122, the lower end of the rice flow distribution sloping plate 122 is received by a finished product rice discharge hole 106, and the upper end of the rice flow distribution sloping plate 122 is received by a blighted rice discharge hole 105. The rice is fully cooled by the cold air filled in the cooling cavity while the blighted rice is winnowed with high quality.

Experiments prove that by adopting the technical scheme, 50 pieces of air source heat pumps are adopted, and the bearing capacity of the conveying belt is 4.5Kg/m²The processing amount is 1 to 1.2 tons/hour, and the power consumption is 39 to 41 degrees/hour. The rice with the water content of 20-27% is preheated from the feeding, air-dried and takes about 30 minutes to cool the discharging of the finished rice product, the finished rice product can be dried to the degree that the water content is 11-13.5%, and the finished rice product can be packaged and transported immediately. The parameters of the bearing capacity or speed of the conveyer belt, the processing capacity, the air quantity, the air speed and the like are set, so that the water content of the finished product rice can be adjusted and controlled.

The above-mentioned implementation is only for clearly illustrating the technical solutions of the present invention, and is not to be construed as limiting the present invention in any way. The present invention has many known alternatives and modifications in the art, which fall within the scope of the present invention without departing from the spirit of the present invention.

Claims

1. The utility model provides a corn air-drying device which characterized in that, includes air source heat pump, preheats chamber and air-drying chamber: a conveying belt group for conveying the unhulled rice is arranged in the air drying cavity, the unhulled rice enters the conveying belt group of the air drying cavity through the preheating cavity, the conveying belt group consists of a plurality of layers of vertically distributed conveying belts, and the feeding end of the lower layer of conveying belt is connected with the blanking end of the upper layer of conveying belt; the condenser of the air source heat pump is connected with an air inlet of the air drying cavity to supply hot air to the air drying cavity, and an air outlet of the air drying cavity is communicated with the preheating cavity.

2. The rice seasoning apparatus of claim 1 further comprising a cooling chamber, wherein the discharge end of the set of conveyors engages the cooling chamber.

3. The rice seasoning apparatus of claim 2, wherein the evaporator of the air source heat pump is communicated with the air inlet of the cooling chamber to supply cooling air to the cooling chamber.

4. The rice air-drying device as claimed in claim 3, wherein a blighted grain air separation mechanism is arranged in the cooling chamber and used for air separation of blighted grains by cooling air.

5. The rice air drying device as claimed in claim 4, wherein the blighted grain air separation mechanism comprises an air separation conveying belt for receiving the feeding hole of the cooling cavity, a rice guide plate is arranged below the air separation conveying belt, an air guide cone is arranged on one side below the rice guide plate, and the air guide cone is correspondingly provided with a booster fan of cooling air; the opposite side of wind-guiding awl is equipped with corn reposition of redundant personnel swash plate, and corn reposition of redundant personnel swash plate lower extreme is accepted by the finished product corn discharge gate, and corn reposition of redundant personnel swash plate upper end is accepted by blighted corn discharge gate.

6. The rice seasoning apparatus of claim 5, wherein a material separating table for receiving the inlet of the cooling chamber is provided above the air separation conveyor, a hood is provided above and on both sides of the material separating table, a falling passage is formed between both sides of the material separating table and the hood, and the air separation conveyor is received below the falling passage. The unhusked rice falls onto the material separating platform and falls onto the air separation conveying belt below from unhusked rice falling channels on two sides of the material separating platform.

7. The rice seasoning apparatus of any one of claims 1 to 6 wherein the preheating chamber receives a vibrating screen below the feed inlet, the lower end of the vibrating screen engaging the feed end of the set of conveyors.

8. A rice seasoning device as claimed in any one of claims 1 to 6 wherein the conveyor belt is provided with a rice scraping means.

9. The rice seasoning apparatus of any one of claims 1 to 6 wherein the discharge end of the vibrating screen is connected to the set of conveyor belts by a first rice elevator.

10. The rice seasoning apparatus of any one of claims 1 to 6 wherein the cooling chamber inlet is connected to the set of conveyors by a second rice elevator.