CN104663876A - Unhusked rice drying device under effect of combination of ultrasonic waves and hot air - Google Patents
Unhusked rice drying device under effect of combination of ultrasonic waves and hot air Download PDFInfo
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- CN104663876A CN104663876A CN201510031427.2A CN201510031427A CN104663876A CN 104663876 A CN104663876 A CN 104663876A CN 201510031427 A CN201510031427 A CN 201510031427A CN 104663876 A CN104663876 A CN 104663876A
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Abstract
The invention mainly discloses an unhusked rice drying device. The drying process comprises the steps of drying, carrying out ultrasonic tempering, drying, carrying out ultrasonic tempering and cooling. The process comprises the following steps: drying unhusked rice layeredly and sectionally under the condition that low-temperature hot air with certain air speed is used so that a material has a fluidic state; then tempering for a period of time under ultrasonic effect; then drying at high temperature with hot air, and tempering again under the ultrasonic effect after drying completely; meanwhile, recovering dry hot air which performs damp and hot exchange on a first layer and a second layer, and preheating dry media of the second layer and the first layer by an efficient gas heat exchanger via dry hot air; and finally drying the hot air with a certain drying capacity, and cooling the unhusked rice. The unhusked rice drying device can solve the problems of low economic benefit and the like caused by high energy consumption, low heat transfer and mass transfer efficiency, low dried unhusked rice quality of the traditional unhusked rice drying device; the dried unhusked rice has the characteristics of good condition, low breakdown rate and convenience in subsequent processing.
Description
Technical field
The present invention be by results after grain moisture content be reduced to the safety that can store and wet the equipment of part, belong to drying device field, be also attributable to grain machinery field.
Background technology
Paddy is one of southern staple food.It is a kind of thermal sensitivity crops, the too fast or quick-fried waist of the improper easy generation of Selecting parameter of rate of drying.Quick-fried waist is one of leading indicator of quality after measurement rice drying.Secondly, paddy is made up of stiff shell and the grain of rice, and when drying, its shell plays a part to hinder the transfer of seed internal moisture exterior surface, and therefore, paddy is more difficult drying as a species complex.Tempering refers in Grain Drying Process and enters soaking zone from dryer section, the humidity in granule interior temperature and grain is exchanged and makes its uniform process.Tempering process can make paddy granule interior carry out damp and hot exchange and make its humidity homogenizing, can effectively reduce paddy moisture gradient, thus reduces the percent cracked rice of drying stress suppression paddy.Tempering can also provide good condition of drying for next drying stage, avoids high-temperature medium to make grain peel or be charred.Therefore in order to ensure the quality after rice drying, reducing percent cracked rice, must sufficient tempering be carried out.But tempering process time is long, will energy waste be caused, increase energy consumption.
Heated-air drying is a kind of conventional drying techniques, is also one of current most widely used grain drying method.Apply in dry run more be concurrent drying, along the drying mode such as mixed flow drying and fluidized bed drying.Heated-air drying equipment is simple, easy and simple to handle, automaticity is high.But also there are some problems in heated-air drying.For improving the efficiency of heated-air drying grain, need to improve dry treatment temperature, very unfavorable for this thermal sensitivity of dry paddy crop like this, cause percent cracked rice to increase, product quality reduces (part grain grain fire damage, its color, smell and taste and nutritional labeling are destroyed).Carrying out continuous drying for making paddy travel forward in fluidized bed drying equipment, needing to increase wind speed.Dried like this paddy was both unfavorable for following process, turn increased energy consumption.
Ultrasonic wave has several physical and chemical effect, need not heat up and just water can be removed from solid, and it also has the effect accelerated rate of drying and reduce residual moisture in solid, low energy consumption.Test proves, ultrasonic wave energy changes material Surface and internal structure, increases cell membrane gap, and then heat and mass transfer enhancement, obvious to falling rate drying period action effect, shortens the drying time of material.
Hot Air Drying mainly combines with ultrasonic wave dry technology by the present invention, for rice drying provides a kind of New drying equipment.This equipment can improve heat transfer in dry run and mass-transfer efficiency, shortens drying time, reduces energy consumption, improves the quality of products.
Summary of the invention
The present invention mainly overcomes that the energy consumption of traditional single heated-air drying paddy technology is high, heat and mass efficiency is low, dry after the problems such as the not high economic benefit of rice quality is low.Under the prerequisite ensureing drying capacity, reduce energy consumption, improve end product quality, obtain higher economic benefit.
Drying equipment technological process of the present invention is the flow process of drying-ultrasonic wave tempering-drying-ultrasonic wave tempering-cooling.This flow process can reasonable energy utilization, reduces energy consumption; Fully carry out tempering, ensure the quality after rice drying.
The present invention is the method adopting ultrasonic combined heated-air drying paddy.Layer and section drying is carried out to paddy.Ground floor drying adopts lower temperature hot blast to carry out drying, rice drying laggard enter tempering stage under ul-trasonic irradiation.Second layer drying adopts higher temperature hot blast to carry out drying, again under ul-trasonic irradiation, carries out tempering after drying.Utilize efficient gas heat exchanger that the hot blast after ground floor carries out damp and hot exchange is carried out preheating to the second layer as the air of drying medium simultaneously, hot blast after the second layer carries out damp and hot exchange is carried out preheating to ground floor as the air of drying medium, makes full use of heat energy.Finally utilize the dryer section hot blast of recovery after treatment to cool paddy, this process is carry out cooling down process to paddy, is again the continuity of tempering process simultaneously.This process can improve heat transfer and the mass-transfer efficiency of dry run, saves energy consumption, significantly improves product quality.Adopt that the paddy of drying of the present invention is of good quality, percent cracked rice is little, is convenient to following process.
The present invention is different from traditional hot air fluidized drying equipment, the installation site inclination certain angle in hothouse of distribution of gas orifice plate.The effect of paddy self gravitation can be made full use of like this travel forward, carry out continuous drying operation.Avoid the simple raising wind speed that relies on paddy is travelled forward and reaches the object of continuous drying, reduce energy consumption.Ultrasonic irradiation apparatus is positioned at both sides, and steel wire guard plays a protective role to radiation appliance.Ultrasonic wave acts in the holding process in its region after paddy every section drying, accelerates the inner damp and hot exchange velocity of paddy from making its humidity homogenizing.First the hot blast carried out after damp and hot exchange is carried out preheating to heat medium, and secondary utilizes, and heat energy is fully utilized, and improves capacity usage ratio.Then continue to carry out cooling effect to paddy after the dryer section hot blast of recovery being carried out drying process by retracting device.Finally by dialling grain wheel apparatus, paddy is transferred out.
Accompanying drawing explanation
Fig. 1 is the structural representation of rice drying equipment of the present invention.
Number in the figure illustrates: 1-elevator, 2-feeding-passage, 3-hothouse, 4,15-electric heater, 5,16-efficient gas heat exchanger, 6,17-air blast, 7,12-gas recovery conduit, 8,18-steel wire guard, 9,19-ultrasonic wave output device, 10-air-introduced machine, 11-gas drier, 13-grain discharging wheel, 14-exhaust outlet, 20,21,22-distribution of gas orifice plate
Detailed description of the invention
Paddy is transported in hothouse 3 through feeding-passage 2 by elevator 1 by drying equipment of the present invention.Paddy is transported on distribution of gas orifice plate 20, and the lower temperature hot blast provided by air blast 6 and electric heater 4 carries out fluidized drying.On the left of hothouse 3 in dropping process (as figure), under the ul-trasonic irradiation that paddy is launched at ultrasonic generator 19, carry out tempering.Steel wire cover 18 plays a protective role.Second layer drying repeats drying-ultrasonic wave tempering process, but the hot blast temperature that air blast 17 and electric heater 15 provide is higher than ground floor dry-heat air temperature.Hot blast after ground floor carries out damp and hot exchange is carried out preheating by efficient gas heat exchanger 16 pairs of second layers as the air of drying medium simultaneously, the hot blast after the second layer carries out damp and hot exchange is carried out preheating by efficient gas heat exchanger 5 pairs of ground floors as the air of drying medium.Last paddy cools at orifice plate 22 place, cooling air is the dry-heat air medium carried out after damp and hot exchange and preheated air, it is acted on the paddy on orifice plate 22 after drying device 11 processes through gas recovery conduit 7,12 respectively by air-introduced machine 10, then discharges hothouse 3 by exhaust outlet 14.After having cooled, paddy is transported to outside hothouse through grain discharging wheel 13.Dry run is that certain thickness material is placed on distribution of gas orifice plate, successively through the flow process of super-dry-ultrasonic wave tempering-drying-ultrasonic wave tempering-cooling.Alternating temperature is dry, carries out tempering simultaneously, transfers out after grain reaches dry requirement by dialling grain wheel 13.
Claims (3)
1. the rice drying equipment under ultrasonic combined hot blast effect, drying equipment mainly comprises: elevator (1), feeding-passage (2), hothouse (3), electric heater (4), (15), efficient gas heat exchanger (5), (16), air blast (6), (17), gas recovery conduit (7), (12), steel wire guard (8), (18), ultrasonic wave output device (9), (19), air-introduced machine (10), gas drier (11), grain discharging wheel (13), exhaust outlet (14), distribution of gas orifice plate (20), (21), (22).Described drying equipment is connected with hothouse (3) by feeding-passage (2) by elevator (1).Ultrasonic wave output device (9) is installed on distribution of gas orifice plate (20) right side, and its outside is provided with steel wire guard (8) and shields.Ultrasonic wave output device (19) is installed in distribution of gas orifice plate (21) left side, and its outside is provided with steel wire guard (18) and shields.Efficient gas heat exchanger (5) is installed between electric heater (4) and air blast (6).Efficient gas heat exchanger (16) is installed between electric heater (15) and air blast (17).Efficient gas heat exchanger (5), (16) are connected by gas recovery conduit (7), (12) same to gas drier (11) respectively.Gas drier (11) same to air-introduced machine (10) is connected, and waste gas is discharged by the exhaust outlet (14) being arranged on distribution of gas orifice plate (22) left side.The paddy reached after dry requirement discharges hothouse (3) through grain discharging wheel (13).Dry run is that certain thickness material is placed on distribution of gas orifice plate (20), (21), (22), successively through the flow process of super-dry-ultrasonic wave tempering-drying-ultrasonic wave tempering-cooling.
2. require that rice drying equipment is characterized in that according to right 1: ultrasonic generator (9), (19) act on the paddy tempering stage in dry run, accelerate paddy internal heat transfer mass transfer.Reach the abundant tempering of paddy and try one's best and shorten the object of slack time, ensure dry rear rice quality.
3. require that rice drying equipment is characterized in that according to right 1: distribution of gas orifice plate (20), (21), (22) are installed for making full use of paddy self gravitation inclination certain angle.Avoid the simple raising wind speed that relies on paddy is travelled forward and reaches the object of continuous drying, reduce energy consumption.To the air as drying medium on distribution of gas orifice plate (20), (21), preheating is carried out respectively through efficient gas heat exchanger (5), (16) to the hot blast after damp and hot exchange is carried out in distribution of gas orifice plate (21), (20), make full use of heat energy, improve heat utilization rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031427.2A CN104663876A (en) | 2015-01-21 | 2015-01-21 | Unhusked rice drying device under effect of combination of ultrasonic waves and hot air |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031427.2A CN104663876A (en) | 2015-01-21 | 2015-01-21 | Unhusked rice drying device under effect of combination of ultrasonic waves and hot air |
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| CN104663876A true CN104663876A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510031427.2A Pending CN104663876A (en) | 2015-01-21 | 2015-01-21 | Unhusked rice drying device under effect of combination of ultrasonic waves and hot air |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107439682A (en) * | 2017-09-04 | 2017-12-08 | 南京财经大学 | A kind of method of microwave hot air combined stable paddy lipase |
| CN110701892A (en) * | 2018-07-09 | 2020-01-17 | 安徽谷王烘干机械有限公司 | Grain drying method and apparatus |
| CN111387528A (en) * | 2020-03-30 | 2020-07-10 | 上海理工大学 | Ultrasonic wave reinforced airflow drying system |
| CN113280593A (en) * | 2021-05-31 | 2021-08-20 | 安徽华谷机械科技有限公司 | Intelligent separation type grain dryer |
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| CN2362083Y (en) * | 1998-09-15 | 2000-02-02 | 周崇杰 | Small efficient grain drying machine |
| CN201828104U (en) * | 2010-10-25 | 2011-05-11 | 宜兴市通达化学有限公司 | Multilayer fluidized bed dryer |
| CN201919594U (en) * | 2011-01-14 | 2011-08-10 | 天津科技大学 | Multistage direct-flow tempering heat pump drying device |
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2015
- 2015-01-21 CN CN201510031427.2A patent/CN104663876A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2362083Y (en) * | 1998-09-15 | 2000-02-02 | 周崇杰 | Small efficient grain drying machine |
| CN201828104U (en) * | 2010-10-25 | 2011-05-11 | 宜兴市通达化学有限公司 | Multilayer fluidized bed dryer |
| CN201919594U (en) * | 2011-01-14 | 2011-08-10 | 天津科技大学 | Multistage direct-flow tempering heat pump drying device |
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| 陈锦飞译: "稻谷的声波干燥", 《粮食与饲料工业》 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107439682A (en) * | 2017-09-04 | 2017-12-08 | 南京财经大学 | A kind of method of microwave hot air combined stable paddy lipase |
| CN110701892A (en) * | 2018-07-09 | 2020-01-17 | 安徽谷王烘干机械有限公司 | Grain drying method and apparatus |
| CN111387528A (en) * | 2020-03-30 | 2020-07-10 | 上海理工大学 | Ultrasonic wave reinforced airflow drying system |
| CN113280593A (en) * | 2021-05-31 | 2021-08-20 | 安徽华谷机械科技有限公司 | Intelligent separation type grain dryer |
| CN113280593B (en) * | 2021-05-31 | 2022-06-07 | 安徽华谷机械科技有限公司 | Intelligent separation type grain dryer |
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