CN102494524B - Circulating airflow drying device for pilot plant test - Google Patents
Circulating airflow drying device for pilot plant test Download PDFInfo
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- CN102494524B CN102494524B CN 201110403388 CN201110403388A CN102494524B CN 102494524 B CN102494524 B CN 102494524B CN 201110403388 CN201110403388 CN 201110403388 CN 201110403388 A CN201110403388 A CN 201110403388A CN 102494524 B CN102494524 B CN 102494524B
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- 238000001035 drying Methods 0.000 title claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000001939 inductive effect Effects 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 abstract description 20
- 230000001276 controlling effect Effects 0.000 abstract description 7
- 229920002472 Starch Polymers 0.000 description 10
- 235000019698 starch Nutrition 0.000 description 10
- 239000008107 starch Substances 0.000 description 10
- 238000007600 charging Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001238 wet grinding Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011020 pilot scale process Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 206010012735 Diarrhoea Diseases 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 210000002985 organ of corti Anatomy 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
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Abstract
The invention discloses a circulating airflow drying device for a pilot plant test. The drying device is characterized by comprising a material drying system which comprises an air blower, a circulating airflow drying pipeline, a spiral feeder, a primary cyclone separator, a secondary cyclone separator, a draught fan, a product screw conveyor and the like, wherein an x-shaped drying material distributor controlled by an opening or closing valve plate is arranged at an intersection of the circulating airflow drying pipeline and the cyclone separators; blanking openings of the primary and secondary cyclone separators are provided with an air lock valve respectively, and the air lock valves are connected with the product screw conveyor; and twelve ultrasonic atomizers for regulating the humidity of the airflow drying pipeline are arranged in an induced air box. The whole device has a complete system, and functions of controlling the flow of airflow, controlling the heating of the airflow, accurately controlling the feeding of wet materials, premixing and feeding dry and wet materials, recovering dry powder, measuring the humidity of a product, controlling a mixing ratio of dry and wet powder, automatically regulating and controlling moisture and the like can be realized.
Description
Technical field
The present invention relates to the pneumatic conveying dryer field, specifically is that a kind of colleges and universities, scientific research department, relevant enterprise of being applicable to carries out the pilot-plant of powder body material drying---a kind of in Pneumatic drying device capable of circulation on probation.
Background technology
At present, powder dryings such as starch and converted starch often adopt pneumatic conveying drying on the domestic industry.In universities, R﹠D institution, when relevant enterprise carries out correlative study and pilot scale, the method of powder drying such as starch and converted starch generally has following several: the one, after methods such as employing centrifuge drying or suction filtration are carried out Separation of Solid and Liquid earlier, use oven for drying, vessel surface need add cover during oven dry, prevent that foreign material from entering, prevent that also material from blowing away, but dry powder often lumps easily, need carry out pulverization process; The 2nd, adopt spray-drying, can be with the emulsion rapid draing of water content 60% or more moisture product below 0.5% extremely, and the dispersity of product is good, the pulverizing of also need not regrinding.But have the energy consumption height, be easy to generate adherent phenomenon and the phenomenon of having loose bowels, the debugging appropriate operational parameters is not easy very much.Therefore powder drying method and the industrial production method therefor of laboratory pilot scale differ greatly, and achievement afterwards causes bigger uncertain factor when promoting.
And at present in the industrial production common Pneumatic drying device since drying time short, generally need higher drying duct, its drying duct often surpasses 20 meters, and setting height(from bottom) has limited its application in universities, R﹠D institution, relevant enterprise laboratory greatly.Industrialized pneumatic conveying dryer is a complete complication system in addition, and formations such as heating boiler, dust pelletizing system, piece-rate system are arranged, and floor space is huge.Therefore, the Pneumatic drying device of also in the laboratory, not trying out at present.
Summary of the invention
Purpose of the present invention just at existing problem in the above-mentioned prior art and custom-designed a kind of in Pneumatic drying device capable of circulation on probation, this device can overcome the limitation of setting height(from bottom), in general civil buildings, can use, intensive in a covering device heating, drying, piece-rate system etc., and can flexible movement, and then realize the drying of powder body materials such as starch, converted starch.
The objective of the invention is to be achieved through the following technical solutions: Pneumatic drying device capable of circulation on probation in of the present invention, comprise the material-transporting system of being formed by air blast, circulating current drying duct, feeding screw and I and II cyclone separator, air-introduced machine and product conveying worm, the intersection of circulating current drying duct and cyclone separator be provided be the x shape and by the dried material distributor of folding valve plate control, be communicated with a heater and air inducing case successively on the air inlet of this dried material distributor; The feed opening place of I and II cyclone separator is provided with wind stopping device respectively and links to each other with the product conveying worm, the product conveying worm is provided with tapping channel and the batch mixing passage that communicates with feeding screw and respectively by discharging slide valve and the control of batch mixing slide valve, is provided with a plurality of for the ultrasonic atomizers of regulating pneumatic conveying drying pipeline humidity in the air inducing case.
Described product conveying worm is provided with tapping channel and the batch mixing passage that communicates with feeding screw and respectively by discharging slide valve and the control of batch mixing slide valve, this batch mixing passage can realize protecting a part of dry powder in the product conveying worm by dusk material valve plate valve adjusting enter in the feeding screw, carry out premixed, the viscosity raw material is carried out " dilution ", perhaps the high raw material of water content is carried out " mummification ", thereby improved pneumatic conveying drying to the fitness of material variety with to the fitness of humidity of materials, realized the function that dried wet feed mixes.
In the intake stack of primary cyclone, be provided with temperature sensor and humidity sensor, be used for the mensuration control function of product humidity and temperature, realize the online Humidity Detection of powder product.And the result who utilizes this determination of moisture controls dried wet stock distributor (being the folding degree of inner valve plate), thereby has ensured the water content of products obtained therefrom.
Pipeline between heater and air inducing case is provided with flowmeter and control valve, the signal that this flowmeter records is as the signal controlling frequency converter, and frequency converter is connected with air blast, by changing the frequency of blower motor, regulate air quantity, realize the flow control function of air-flow.
Mounting temperature sensor on the export pipeline of described heater, by the measured temperature of temperature sensor as control signal, the heating power of control heater, that realizes air-flow adds the thermal control function.
Described feeding screw adopts stepper motor as driving force, and by control wave control rotating speed of motor, feeding screw adopts the screw rod of uniform pitch to make, and realizes the accurate inlet amount of wet stock.
In the circulating current drying duct, be provided with humidity sensor, by the humidity in this humidity sensor control circulating current drying duct, namely the humidity of surveying by this sensor is as control signal, the number difference of control supersonic generator work, thereby regulate the humidity of air intake, assist to regulate the moisture of starch, converted starch final products, the realization product moisture is regulated the control function automatically.
Device of the present utility model has the recovery function of dry powder, gets terminally at airflow drying tube, the two stage cyclone separator is installed is carried out the recovery of dry powder, and wind stopping device is installed is carried out the isolation of pressure, easy-unloading.The cyclone separator long service life does not need extra energy consumption, under design pressure and tolerance condition, can remove 〉=solid particle of 10 μ m.At operating point, separative efficiency is 99%, and in operating point ± 15% scope, separative efficiency is 97%.And separate unit cyclone separator pressure falls and is not more than 0.05MPa.And partial separative efficiency is higher than first order separator when selecting cyclone separator for use, is conducive to the load of equilibrium separation device, improves separating efficiency simultaneously, has guaranteed the environment of workplace, has improved product recovery rate.
The effect of dried wet stock distributor is the quantitative mixing that realizes dried wet-milling among the present invention, realizes material cyclic drying in drying system, thereby has reduced the setting height(from bottom) of pneumatic conveyer dryer, makes the popularization of this circular form pneumatic conveying drying become possibility.
The present invention has following function, characteristics: in the air inducing case supersonic generator is installed, is possessed moisture content and regulate the control function automatically; In the outlet of air inducing case the frequency device that flow apparatus cooperates air blast to install is installed, is possessed air flow rate and control function automatically; Device carries heater, and the temperature that cooperates temperature transmitter to possess air-flow is controlled function automatically; Between product conveying worm and feeding screw, the dry powder discharge shutter is set, can in feeding screw, carry out premixed, possessed premix charging function dried, wet stock; Feeding screw adopts stepper motor as driving force, by the adjusting of control wave, possesses the accurate charging function of wet stock; Get terminally at airflow drying tube, the two stage cyclone separator is installed is carried out the recovery of dry powder, possess the recovery function of dry powder; At the end of airflow drying tube, the determination of moisture sensor is installed, cooperate dried wet powder blender, namely realize the online measuring ability of product moisture, realize that simultaneously it is function capable of circulation that dried wet-milling mixes.
Description of drawings
Fig. 1 is structure of the present invention, schematic flow sheet.
Fig. 2 is dried each view of wet stock distributor, and wherein a is the complete shut-down state, and b is intermediateness, and c is full-gear.
Among the figure: 1-air inducing case, 2-volume damper, 3-flowmeter, the 4-heater, the dried wet stock distributor of 5-(containing the folding valve plate), 6-air blast, the 7-primary cyclone, 8-secondary cyclone, 9, the 10-wind stopping device, 11-product conveying worm, 12-discharging slide valve, 13-batch mixing slide valve, the 14-feeding screw, 15-charging slide valve, 16-feed hopper, 17-circulating current drying duct, the 18-air-introduced machine.
MIC01, MIC02 are humidity sensor, and TIC01, TIC02 are temperature sensor, and FIC01, FIC02 are respectively material, air quantity flowmeter.Survey the inlet amount of material and the flow of wind respectively.
The specific embodiment
The present invention is described further below in conjunction with accompanying drawing:
As shown in the figure: Pneumatic drying device capable of circulation on probation in of the present invention, comprise the material-transporting system of being formed by air blast 6, circulating current drying duct 17, feeding screw 14 and primary cyclone 7, secondary cyclone 8, air-introduced machine 18 and product conveying worm 11, the intersection of circulating current drying duct and cyclone separator be provided be the x shape and by the dried material distributor 5 of folding valve plate (see figure 2) control, be communicated with a heater 4 and air inducing case 1 successively on the air inlet of this dried material distributor; The feed opening place of I and II cyclone separator is provided with wind stopping device 9,10 and link to each other with product conveying worm 11 respectively, the product conveying worm is provided with tapping channel and the batch mixing passage that communicates with feeding screw and respectively by discharging slide valve 12 and 13 controls of batch mixing slide valve, is provided with a plurality of for the ultrasonic atomizers of regulating pneumatic conveying drying pipeline humidity in air inducing case 1.
The each several part function is specific as follows:
In air inducing case 1, dividing plate is set, at dividing plate 12 supersonic generators is installed, humidity sensor MIC02 was installed before air blast 6.Utilize the measured humidity of sensor MIC02 as control signal, the number difference of control supersonic generator work, thereby the humidity of regulating air intake, the moisture content of starch, converted starch final products is regulated in assistance, and realization product moisture content is regulated the control function automatically.
Flowmeter 3 is installed after air inducing case 1, before the heater 4, and the throughput that this flowmeter 3 records is as the signal controlling frequency converter, and frequency converter and air blast 6 links by changing the frequency of air blast 6 motors, are regulated air quantity, realize the flow control function of air-flow.
Mounting temperature sensor TIC02 on the export pipeline of heater 4.Utilize the measured temperature of temperature sensor TIC02 as control signal, the heating power of control heater 4, that realizes air-flow adds the thermal control function.
Between product conveying worm 11, feeding screw 14, pipeline is set, the adjusting of a part of dry powder in the product conveying worm 11 by batch mixing slide valve 13 entered in the feeding screw 14, carry out premixed, the viscosity raw material is carried out " dilution ", perhaps the high raw material of water content is carried out " mummification ", thereby improved pneumatic conveying drying to the fitness of material variety with to the fitness of humidity of materials, realized the function that dried wet feed mixes.
Drive unit at feeding screw 14 adopts stepper motor, the screw rod that feeder adopts.Just can accurately control rotating speed of motor by the regulating impulse signal, and the spiral organ of uniform pitch has the rule of linear charging, therefore can realize the accurate charging function of premix material.
At pneumatic conveying dryer main body 17 ground ends, install, and be separately installed with wind stopping device 9,10 in the bottom of secondary cyclone 8, primary cyclone 7.Utilize the cyclone separator of two-stage series connection to carry out the recovery of dry powder, can remove 〉=solid particle of 10 μ m and separate unit cyclone separator pressure falls and is not more than 0.05MPa.Utilize wind stopping device to carry out the isolation of pressure, easy-unloading.Realized the rate of recovery of automatic recovery product and assurance product.
Humidity sensor MIC01 was installed before air-flow enters primary cyclone 7, before cyclone separator 7 and air blast 6 inlet tubes have one section intersection that dried wet stock distributor 5(is installed to see Fig. 2).Humidity sensor MIC01 can carry out the online Humidity Detection of powder product, utilize the measured signal of humidity sensor MIC01 simultaneously, control the folding degree of dried wet stock distributor 5, realize the quantitative mixing of dried wet-milling, realize material cyclic drying in drying system, thereby reduced the setting height(from bottom) of pneumatic conveyer dryer.Realize the measurement function of product humidity, dried wet-milling mixing match control function.
When the present invention uses, at first regulate dried wet stock distributor 5 and be in complete shut-down state (seeing Fig. 2 (a)) and open air blast 6, drive air-introduced machine 18, regulate volume damper 2 to the appropriate gas flow flow.Set work temperature IC02, open heater 4 power switches, after equitemperature is stable, open feeding screw 14 power switches, regulate suitable inlet amount, material from feed hopper 16 chargings, regulate the aperture size of charging slide valve 15, can control the speed that material adds.In a single day material enters, move along airflow drying tube, carrying out gas-solid two through overdrying wet stock distributor 5, primary cyclone 7, secondary cyclone 8 is separated: solid material flows out through wind stopping device 9,10 from the bottom of primary cyclone 7, secondary cyclone 8 respectively, enter product conveying worm 11, enter feeding screw 14 through batch mixing slide valve 13 and carry out batch mixing recirculation, the material of process discharging slide valve 12 is exactly dry powder product; Gas is successively drawn by air-introduced machine 18 through primary cyclone 7, secondary cyclone 8 tops.According to the humidity MIC02 in the airflow drying tube, control the number of ultrasonic ultrasonic delay line memory work in the air inducing case 1 automatically, regulate humidity.According to product moisture MIC01 requirement, regulate aperture (shown in Figure 2) the control product moisture of dried wet stock distributor 5.
Finish above operation and can realize the cyclic drying operation.
Claims (7)
1. Pneumatic drying device capable of circulation on probation in a kind, it is characterized in that: comprise the material-transporting system of being formed by air blast, circulating current drying duct, feeding screw and I and II cyclone separator, air-introduced machine and product conveying worm, the intersection of circulating current drying duct and secondary cyclone be provided be the x shape and by the dried material distributor of folding valve plate control, be communicated with a heater and air inducing case successively on the air inlet of this dried material distributor; The feed opening place of I and II cyclone separator is provided with wind stopping device respectively and links to each other with the product conveying worm, is provided with a plurality of for the ultrasonic atomizer of regulating pneumatic conveying drying pipeline humidity in the air inducing case.
2. Pneumatic drying device capable of circulation on probation in according to claim 1 is characterized in that: the product conveying worm is provided with tapping channel and the batch mixing passage that communicates with feeding screw and respectively by discharging slide valve and the control of batch mixing slide valve.
3. Pneumatic drying device capable of circulation on probation is characterized in that: be provided with temperature sensor and humidity sensor in the intake stack of primary cyclone in according to claim 1.
4. Pneumatic drying device capable of circulation on probation in according to claim 1, it is characterized in that: the pipeline between heater and air inducing case is provided with flowmeter and volume damper.
5. Pneumatic drying device capable of circulation on probation in according to claim 1 is characterized in that: mounting temperature sensor on the export pipeline of heater, by the measured temperature of temperature sensor as control signal, the heating power of control heater.
6. Pneumatic drying device capable of circulation on probation in according to claim 1, it is characterized in that: feeding screw adopts stepper motor as driving force, by control wave control rotating speed of motor, feeding screw adopts the screw rod of uniform pitch to make, and realizes the accurate inlet amount of wet stock.
7. Pneumatic drying device capable of circulation on probation in according to claim 1 is characterized in that: be provided with humidity sensor in the circulating current drying duct, by the humidity in this humidity sensor control circulating current drying duct.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110403388 CN102494524B (en) | 2011-12-07 | 2011-12-07 | Circulating airflow drying device for pilot plant test |
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| CN 201110403388 CN102494524B (en) | 2011-12-07 | 2011-12-07 | Circulating airflow drying device for pilot plant test |
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| CN102494524A CN102494524A (en) | 2012-06-13 |
| CN102494524B true CN102494524B (en) | 2013-10-09 |
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| CN103743198B (en) * | 2013-12-31 | 2015-10-21 | 楚雄博杉科技有限公司 | There is circulating fluidised bed apparatus that is dry and crushing function |
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| CN113203262B (en) * | 2021-04-27 | 2022-07-19 | 湖南农业大学 | Three-return-stroke cyclone-type intelligent rapeseed drying control system |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2517040A1 (en) * | 1981-11-20 | 1983-05-27 | Setan Etudes Analyses | Air circuit for drier in bleaching feed - has heated air fed to incoming cold air from heater above drying chamber |
| JP2001071326A (en) * | 1999-09-03 | 2001-03-21 | Nissui Kako Kk | Method and device for drying raw material of plastic |
| DE20106617U1 (en) * | 2001-04-08 | 2001-06-21 | Wittmann Robot Systeme GmbH, 90571 Schwaig | Arrangement for the regeneration of drying cartridges loaded with moisture from process air |
| CN101831314B (en) * | 2009-03-12 | 2013-08-07 | 天华化工机械及自动化研究设计院有限公司 | Method for humidifying and drying coking coal in coke oven and equipment therefor |
| CN201653074U (en) * | 2010-01-28 | 2010-11-24 | 常州市星干干燥设备有限公司 | Closed-loop circulating drying unit |
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Inventor after: Zhao Yuqi Inventor after: Shang Feng Inventor after: Cai Zhuanghong Inventor after: Yang Xiuqin Inventor after: Zhao Yang Inventor after: Zhu Bing Inventor after: Fu Dayong Inventor after: Zhang Penghua Inventor after: Wan Shanshan Inventor before: Zhao Yuqi Inventor before: Cai Zhuanghong Inventor before: Yang Xiuqin Inventor before: Zhao Yang Inventor before: Zhu Bing Inventor before: Fu Dayong Inventor before: Zhang Penghua Inventor before: Wan Shanshan |
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Effective date of registration: 20160923 Address after: 450001, 13, block 11, 1 units, 5 block road, Gao Cheng, Henan, Zhengzhou Province Patentee after: Henan Lai Pake chemical industry equipment Manufacturing Co., Ltd Address before: 450042, Henan Road, Zhengzhou, Henan Province, Career Academy, 548 Patentee before: Zhao Yang |
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Granted publication date: 20131009 Termination date: 20201207 |