CN104006631A - Microwave multistage fluidized bed drying device and drying method thereof - Google Patents
Microwave multistage fluidized bed drying device and drying method thereof Download PDFInfo
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- 238000001035 drying Methods 0.000 title claims abstract description 66
- 238000009826 distribution Methods 0.000 claims abstract description 63
- 239000000463 material Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 8
- 239000003077 lignite Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000005987 sulfurization reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- 230000035515 penetration Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
The invention relates to a microwave multistage fluidized bed drying device and a drying method of the microwave multistage fluidized bed drying device. A fluidized bed dryer comprises a fluidized bed body and gas distribution plates, a microwave generator is arranged on the outer wall of the fluidized bed body, three layers of the gas distribution plates with adjustable angles are arranged in the fluidized bed body from top to bottom, the microwave generator is started, microwaves are used as a heat source, the inclination angle and the microwave power of the gas distribution plates are adjusted according to the surface temperature of detection materials, the aperture ratio of the gas distribution plates ranges from three percent to five percent, the adjustment air speed ranges from 1 m/s to 2 m/s, the raw material standing time is controlled to be within one min to five min, the water content in raw materials is smaller than 15 percent, and the dried materials enter a product drying tank from a discharge port. The microwave multistage fluidized bed drying device and the drying method of the microwave multistage fluidized bed drying device have the advantages that the standing time of the materials in a fluidized bed drying reactor is controlled by adjusting the inclination angles of the multistage distribution plates, and the materials with different water contents can be dried; maximum utilization of microwave energy is achieved by changing the microwave drying power at feed ports of the multistage distribution plates.
Description
Technical field
The present invention and a kind of drying device and method, be specially adapted to the material of higher, the oxidizable and easy spontaneous combustion of water content, relates in particular to a kind of Multistage Microwave fluidized bed drying device and drying means thereof.
Background technology
Fluidized bed drying equipment is widely used in the industries such as chemical industry, oil, food, biomedicine, is applicable to dry various graininess, sheet and heat sensitive material.But there is following shortcoming in traditional fluidized bed drying equipment: 1, current used fluidized bed drying equipment major part belongs to single-stage fluidized bed, the type fluid bed is the control that complete mixing flow type is unfavorable for residence time of material, easily occurs uneven drying or the phenomenon such as overheated; 2, traditional fluid bed drying medium adopts the danger that hot blast existence is dried material oxidation, catches fire and explode, and adopts superheated steam can bring the problem such as high energy consumption and shortage of water resources; 3, adopt the fluid unit of built-in heat exchanger because of the unreasonable normal fluidisation that has hindered material that arranges of pipe laying, when the material that particularly humidity is larger has just entered drier, easily causing accumulation and the obstruction of material between pipe, also there is the problems such as heat exchanger tube serious wear in this tyre built-in heat exchanger fluidized bed drying technology.As the patent that application number is 201310725230.X, a kind of superheat steam drying device and method are disclosed, although this device has reclaimed the exhaust steam of superheated steam, energy-efficient, obstruction and the wear problem of inner-heating tube do not solve.
Microwave interacts with its polar molecule to material is inner, and polar molecule structure is changed, and does electric polarity motion simultaneously, and intermolecular frequent impact produces a large amount of frictional heats, reaches dry object.Microwave technology has instantaneity, globality, selective, energy utilizes high efficiency, and safety, health, free of contamination advantage, has been widely used in dry field.If but material size is less than the depth of microwave penetration, the rapid vaporization of material internal moisture can not be discharged in time, makes material " expanded " and overheated, and heat energy, at material inner accumulation, causes the hurried rising of internal temperature.Therefore, microwave drying needs to be aided with convection current often, and convection gas can effectively be taken the moisture on material surface out of, effectively shortens drying time.As the application number patent that is 201110130476.3, a kind of method of microwave fluidized drying brown coal is disclosed, described method comprises first carries out predrying through the microwave device of logical hot blast by raw material brown coal, carry out fluidized drying through the fluidized bed plant of logical hot blast again, free water content in raw material brown coal is reached below 1%.
It is short that fluidized bed dryer coupling microwave technology has drying time, and baking temperature is lower, and energy consumption is low, and spontaneous combustion or the explosion danger that can avoid material hot-spot to bring, be conducive to realize continuous drying.If application number is the patent of 200920193648.X and 201220174418.0, distribution discloses a kind of microwave fluidized-bed equipment for powder drying and a kind of for the dry microwave fluidized-bed equipment of solid particle, can make material under the condition of lower temperature, be dried processing, can improve dry mass and the output of material, be particularly useful for the rapid draing processing of low melting point, temperature-sensitive, oxidizable solid particle.But the said equipment is unfavorable for controlling the time of staying of material, easily there is uneven drying or the phenomenon such as overheated, and be difficult to realize continuous drying.
In sum, also there is no at present one by microwave drying and the good coupling technique of fluidized bed drying, realize the time of staying of material and can control, continuous uniform turnover material, energy consumption for drying is low, and drying efficiency is high, and quality of material can ensure.
Summary of the invention
Technical problem to be solved by this invention is: overcome the shortcoming existing in prior art, a kind of Multistage Microwave fluidized bed drying device and drying means thereof are provided, utilize that microwave fluidized bed drying technology has that heat utilization rate is high, rate of drying is fast, uniform drying, be difficult for producing hot-spot and be easy to the advantage of controlling.
The present invention for the technical scheme that the problem of the above-mentioned proposition of solution adopts is:
A kind of Multistage Microwave fluidized bed drying device, comprise feed bin 1, feeding screw 2 and fluidized bed dryer 3, feed bin 1 below is provided with feeding screw 2, feeding screw 2 is connected with the charging aperture 23 on fluidized bed dryer 3 tops, described fluidized bed dryer 3 comprises fluidized bed body 4 and gas distribution grid 5, on fluidized bed body 4 outer walls, is provided with microwave generator 6, and described fluidized bed body 4 inside are arranged with the gas distribution grid 5 of three layers of adjustable-angle from top to bottom.
Between described gas distribution grid 5 and fluidized bed body 4 inwalls, angle of regulation range is 0-60 degree.
On described fluidized bed body 4 outer walls, be provided with 3 microwave generators 6, gas distribution grid 5 is positioned at fluidized bed body 4 microwave generator 6 corresponding positions, realizes the maximum utilization of microwave energy.
A kind of Multistage Microwave fluidized bed drying device, also comprise the unit 7 of supplying gas, gas flowmeter 8, cyclone separator 9 and gas preheater 10, supply gas on the pipeline of unit 7 ends and be provided with gas flowmeter 8, the gas outlet 15 that fluidized bed dryer 3 upper ends arrange connects the air inlet 17 of cyclone separator 9, the lower end of cyclone separator 9 is provided with the rewinding mouth 21 with valve 14, the exhaust outlet 18 on cyclone separator 9 tops is all connected with the gas vent 19 of gas flowmeter 8 with the air inlet 16 that fluidized bed dryer 3 lower ends arrange, between the air inlet 16 of described fluidized bed dryer 3 and the gas vent 19 of gas flowmeter 8, on pipeline, be provided with gas preheater 10.
A kind of Multistage Microwave fluidized bed drying device, also comprises dry products tank 20, and the rewinding mouth 21 that the discharging opening 22 of fluidized bed dryer 3 bottoms and the lower end of cyclone separator 9 arrange is all communicated with dry products tank 20.
Described cyclone separator 9 inwalls are compounded with refractory layer 11, greatly improve heat resistance, increase the service life, and increase work efficiency.
Described cyclone separator 9 adopts carbon steel material to be made.
Described gas distribution grid 5 is hinged on fluidized bed body 4 madial walls, and gas distribution grid 5 roots are provided with pull bar 12, adjustments of gas distribution grid 5 angle control residence time of material.
Described gas distribution grid 5 surfaces are provided with infrared temperature probe 24, and air inlet 16 places that the gas outlet 15 that fluidized bed dryer 3 upper ends arrange and fluidized bed dryer 3 lower ends arrange are provided with gas thermocouple temperature measuring apparatus 25.
Described gas distribution grid 5 is corrosion resistant plate gas distribution grid, and tetrafluoro web plate 13 is laid on gas distribution grid 5 surfaces, suppresses microwave reflection.
Described tetrafluoro web plate 13 lower surfaces and the sulfuration of corrosion resistant plate gas distribution grid are pasted.
Described gas distribution grid 5 is square gas distribution grid.
Described gas distribution grid 5 percent openings are 3%-5%, and large opening rate has reduced bed pressure drop and gas transmitting power energy consumption.
A drying means for Multistage Microwave fluidized bed drying device, comprises that step is as follows:
Step 1: will pulverize by dry material, form the raw material of water content 18-60%, granularity 0.5-10mm, and deliver into feed bin 1, raw material enters fluidized bed dryer 3 through feeding screw 2;
Step 2: open microwave generator 6, power is 1000-3000W, taking microwave as thermal source, controls fluidized bed dryer 3 inner drying temperature below 200 DEG C;
Step 3: the air that the unit 7 of supplying gas provides enters fluidized bed dryer 3 from air inlet 16, air temperature control is at 40-60 DEG C, according to the angle of inclination of surveying stock chart surface temperature adjustment gas distribution grid 5, gas distribution grid 5 percent openings are 3%-5%, adjustment wind speed is 1-2m/s, and control residence time of raw material is 1-5min, and free water content in raw material is reached below 15%, dried raw material enters dry products tank 20 by discharging opening 22, obtains dry products;
Step 4: the hot and humid air generating in fluidized bed dryer 3 carries out gas solid separation in cyclone separator 9, gas after dedusting flows out and is directly mixed into gas preheater 10 from the exhaust outlet 18 of cyclone separator 9, isolated powder enters dry products tank 20 by rewinding mouth 21, remove a large amount of dust, realize and reclaiming.
Beneficial effect of the present invention is: solved the bad control of baking temperature that prior art exists, the problem that product quality cannot ensure; Control the time of staying of material in fluidized bed dryer by adjusting multistage gas distribution grid angle of inclination, be suitable for the dry of different moisture content material; By changing microwave generator microwave drying power, realize the maximum utilization of microwave energy, realize the microwave fluidized bed drying device novel structure that the present invention utilizes reliable, have equipment simple, the outstanding advantages such as be convenient to manufacture, easy to maintenance.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structure for amplifying schematic diagram of gas distribution grid in Fig. 1.
Wherein, 1-feed bin, 2-feeding screw, 3-fluidized bed dryer, 4-fluidized bed body, 5-gas distribution grid, 6-microwave generator, the 7-unit of supplying gas, 8-gas flowmeter, 9-cyclone separator, 10-gas preheater, 11-refractory layer, 12-pull bar, 13-tetrafluoro web plate, 14-valve, 15-gas outlet, 16-air inlet, 17-air inlet, 18-exhaust outlet, 19-gas vent, 20-dry products tank, 21-rewinding mouth, 22-discharging opening, 23-charging aperture, 24-infrared temperature probe, 25-gas thermocouple temperature measuring apparatus.
Detailed description of the invention
Further illustrate embodiments of the invention below in conjunction with accompanying drawing.
Embodiment 1, with reference to Fig. 1-2, a kind of Multistage Microwave fluidized bed drying device described in this detailed description of the invention, comprise feed bin 1, feeding screw 2 and fluidized bed dryer 3, feed bin 1 below is provided with feeding screw 2, feeding screw 2 is connected with the charging aperture 23 on fluidized bed dryer 3 tops, described fluidized bed dryer 3 comprises fluidized bed body 4 and gas distribution grid 5, on fluidized bed body 4 outer walls, be provided with microwave generator 6, described fluidized bed body 4 inside are arranged with the gas distribution grid 5 of three layers of adjustable-angle from top to bottom.
Between described gas distribution grid 5 and fluidized bed body 4 inwalls, angle of regulation range is 0-60 degree.
On described fluidized bed body 4 outer walls, be provided with 3 microwave generators 6, gas distribution grid 5 is positioned at fluidized bed body 4 microwave generator 6 corresponding positions, realizes the maximum utilization of microwave energy.
A kind of Multistage Microwave fluidized bed drying device, also comprise the unit 7 of supplying gas, gas flowmeter 8, cyclone separator 9 and gas preheater 10, supply gas on the pipeline of unit 7 ends and be provided with gas flowmeter 8, the gas outlet 15 that fluidized bed dryer 3 upper ends arrange connects the air inlet 17 of cyclone separator 9, the lower end of cyclone separator 9 is provided with the rewinding mouth 21 with valve 14, the exhaust outlet 18 on cyclone separator 9 tops is all connected with the gas vent 19 of gas flowmeter 8 with the air inlet 16 that fluidized bed dryer 3 lower ends arrange, between the air inlet 16 of described fluidized bed dryer 3 and the gas vent 19 of gas flowmeter 8, on pipeline, be provided with gas preheater 10.
A kind of Multistage Microwave fluidized bed drying device, also comprises dry products tank 20, and the rewinding mouth 21 that the discharging opening 22 of fluidized bed dryer 3 bottoms and the lower end of cyclone separator 9 arrange is all communicated with dry products tank 20.
Described cyclone separator 9 inwalls are compounded with refractory layer 11, greatly improve heat resistance, increase the service life, and increase work efficiency.
Described cyclone separator 9 adopts carbon steel material to be made.
Described gas distribution grid 5 is hinged on fluidized bed body 4 madial walls, and gas distribution grid 5 roots are provided with pull bar 12, adjustments of gas distribution grid 5 angle control drying residencing times.
Described gas distribution grid 5 surfaces are provided with infrared temperature probe 24, and air inlet 16 places that the gas outlet 15 that fluidized bed dryer 3 upper ends arrange and fluidized bed dryer 3 lower ends arrange are provided with gas thermocouple temperature measuring apparatus 25.
Described gas distribution grid 5 is corrosion resistant plate gas distribution grid, and tetrafluoro web plate 13 is laid on gas distribution grid 5 surfaces, suppresses microwave reflection.
Described tetrafluoro web plate 13 lower surfaces and the sulfuration of corrosion resistant plate gas distribution grid are pasted.
Described gas distribution grid 5 is square gas distribution grid.
Described gas distribution grid 5 percent openings are 3%-5%, and large opening rate has reduced bed pressure drop and gas transmitting power energy consumption.
Embodiment 2-4 is the drying means of Multistage Microwave fluidized bed drying device.
Embodiment 2:
Material that will be dry is that initial water content is 35% brown coal, and brown coal deliver into feed bin 1 after fragmentation, particle diameter 8mm, and raw material enters fluidized bed dryer 3 through feeding screw 2; Fluidizing agent air enters fluidized bed dryer 3 through gas flowmeter 8 and gas preheater 10 from air inlet 16, three layers of gas distribution grid 5 of the interior laying of fluidized bed dryer 3, gas distribution grid 5 percent openings 4%; Open microwave generator 6 power 2500W, measure the interior temperature of charge of fluidized bed dryer 3 by infrared temperature probe 24, adjust microwave generator 6 power according to stock chart surface temperature, keeping the interior temperature of fluidized bed dryer 3 is 180 DEG C; Adjusting gas velocity by gas flowmeter 8 is 1.6 m/s left and right, controls after residence time of material 4 min, and the angle of inclination of adjustments of gas distribution grid 5, enters dry products tank 20 by discharging port of fluidized bed 6; After dry, gas is carried part pulverized coal particle secretly and is entered cyclone separator 9 through gas outlet 15, realizes fine coal separated and collected.Warp is to the interior fine coal determination of moisture of dry products tank 20, and water content is 12%, and it is less to place a period of time moisture relapse rate.
Embodiment 3:
Material that will be dry is that initial water content is 55% brown coal, and brown coal deliver into feed bin 1 after fragmentation, particle diameter 7mm, and raw material enters fluidized bed dryer 3 through feeding screw 2; Fluidizing agent air enters fluidized bed dryer 3 through gas flowmeter 8 and gas preheater 10 from air inlet 16, three layers of gas distribution grid 5 of the interior laying of fluidized bed dryer 3, and gas distribution grid 5 percent openings are 4%; Open microwave generator 6 power 3000W, measure the interior temperature of charge of fluidized bed dryer 3 by infrared temperature probe 24, adjust microwave generator 6 power according to stock chart surface temperature, keeping the interior temperature of fluidized bed dryer 3 is 195 DEG C; Adjusting gas velocity by gas flowmeter 8 is 1.8 m/s left and right, controls after residence time of material 5min, and the angle of inclination of adjustments of gas distribution grid 5, enters dry products tank 20 by discharging port of fluidized bed 6; After dry, gas is carried part pulverized coal particle gas outlet 15 secretly and is entered cyclone separator 9, realizes fine coal separated and collected.Warp is to the interior fine coal determination of moisture of dry products tank 20, and water content is 14%, and it is less to place a period of time moisture relapse rate.
Embodiment 4:
Material that will be dry is that initial water content is 30% domestic sludge particle, and mud granule delivers into feed bin 1, particle diameter 5.6mm, and mud granule enters fluidized bed dryer 3 through feeding screw 2; Fluidizing agent air enters fluidized bed dryer 3 through gas flowmeter 8 and gas preheater 10 from air inlet 16, three layers of gas distribution grid 5 of the interior laying of fluidized bed dryer 3, gas distribution grid 5 percent openings 4%; Open microwave generator 6 power 2000W, measure the interior temperature of charge of fluidized bed dryer 3 by infrared temperature probe 24, adjust microwave generator 6 power according to stock chart surface temperature, keeping the interior temperature of fluidized bed dryer 3 is 160 DEG C; Adjusting gas velocity by gas flowmeter 8 is 1.4 m/s left and right, controls after residence time of material 3min, and the angle of inclination of adjustments of gas distribution grid 5, enters dry products tank 20 by discharging port of fluidized bed 6; After dry, gas is carried part mud granule gas outlet 15 secretly and is entered cyclone separator 9, realizes mud separated and collected.Through the interior sludge water content of dry products tank 20 is measured, water content is 11%, and it is less to place a period of time moisture relapse rate.
Specific embodiments of the invention are not construed as limiting the invention, and every employing analog structure of the present invention and variation, all in protection scope of the present invention.
Claims (9)
1. a Multistage Microwave fluidized bed drying device, it is characterized in that: comprise feed bin (1), feeding screw (2) and fluidized bed dryer (3), feed bin (1) below is provided with feeding screw (2), feeding screw (2) is connected with the charging aperture (23) on fluidized bed dryer (3) top, described fluidized bed dryer (3) comprises fluidized bed body (4) and gas distribution grid (5), on fluidized bed body (4) outer wall, be provided with microwave generator (6), the inner gas distribution grid (5) that is arranged with from top to bottom three layers of adjustable-angle of described fluidized bed body (4).
2. a kind of Multistage Microwave fluidized bed drying device as claimed in claim 1, it is characterized in that: on described fluidized bed body (4) outer wall, be provided with 3 microwave generators (6), gas distribution grid (5) is positioned at fluidized bed body (4) microwave generator (6) corresponding position.
3. a kind of Multistage Microwave fluidized bed drying device as claimed in claim 1, it is characterized in that: also comprise the unit of supplying gas (7), gas flowmeter (8), cyclone separator (9) and gas preheater (10), supply gas on the pipeline of unit (7) end and be provided with gas flowmeter (8), the gas outlet (15) that fluidized bed dryer (3) upper end arranges connects the air inlet (17) of cyclone separator (9), the lower end of cyclone separator (9) is provided with the rewinding mouth (21) of band valve (14), the air inlet (16) that the exhaust outlet (18) on cyclone separator (9) top arranges with fluidized bed dryer (3) lower end is all connected with gas flowmeter (8) outlet (19), between the air inlet (16) of described fluidized bed dryer (3) and gas flowmeter (8) outlet (19), on pipeline, be provided with gas preheater (10).
4. a kind of Multistage Microwave fluidized bed drying device as claimed in claim 3, it is characterized in that: also comprise dry products tank (20), the rewinding mouth (21) that the discharging opening (22) of fluidized bed dryer (3) bottom and the lower end of cyclone separator (9) arrange is all communicated with dry products tank (20).
5. a kind of Multistage Microwave fluidized bed drying device as claimed in claim 1, is characterized in that: described gas distribution grid (5) is hinged on fluidized bed body (4) madial wall, and gas distribution grid (5) root is provided with pull bar (12).
6. a kind of Multistage Microwave fluidized bed drying device as described in claim 1 or 5, it is characterized in that: described gas distribution grid (5) surface is provided with infrared temperature probe (24), the air inlet (16) that the gas outlet (15) that fluidized bed dryer (3) upper end arranges and fluidized bed dryer (3) lower end arrange locates to be provided with gas thermocouple temperature measuring apparatus (25).
7. a kind of Multistage Microwave fluidized bed drying device as described in claim 1 or 5, is characterized in that: described gas distribution grid (5) is corrosion resistant plate gas distribution grid, and tetrafluoro web plate (13) is laid on gas distribution grid (5) surface.
8. a kind of Multistage Microwave fluidized bed drying device as claimed in claim 1, is characterized in that: described gas distribution grid (5) percent opening is 3%-5%.
9. a drying means for Multistage Microwave fluidized bed drying device, is characterized in that: comprise that step is as follows:
Step 1: will pulverize by dry material, form the raw material of water content 18-60%, granularity 0.5-10mm, and deliver into feed bin (1), raw material enters fluidized bed dryer (3) through feeding screw (2);
Step 2: open microwave generator (6), power is 1000-3000W, taking microwave as thermal source, controls fluidized bed dryer (3) inner drying temperature below 200 DEG C;
Step 3: the air that the unit of supplying gas (7) provide enters fluidized bed dryer (3) from the air inlet (16) of fluidized bed dryer (3), air temperature control is at 40-60 DEG C, according to the angle of inclination of surveying stock chart surface temperature adjustment gas distribution grid (5), gas distribution grid (5) percent opening is 3%-5%, adjusting wind speed is 1-2 m/s, control residence time of raw material is 1-5min, water content in raw material is reached below 15%, dried product enters dry products tank (20) by discharging opening (22), obtains dry products;
Step 4: the hot and humid air generating in fluidized bed dryer (3) carries out gas solid separation in cyclone separator (9), gas after dedusting flows out and is directly mixed into gas preheater (10) from the exhaust outlet (18) of cyclone separator (9), isolated powder enters dry products tank (20) by rewinding mouth (21), realizes and reclaiming.
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| CN106123492A (en) * | 2016-07-19 | 2016-11-16 | 浙江工业大学 | A kind of microwave horizontal multi-cell fluidized bed drying device |
| CN106277714A (en) * | 2016-08-16 | 2017-01-04 | 绿水股份有限公司 | A kind of sludge drying system of high thermal driving force |
| CN106813458A (en) * | 2017-03-31 | 2017-06-09 | 济宁学院 | Energy-saving and environment-friendly integrated multi-stage microwave fluidized bed drying system and treatment method |
| CN107694871A (en) * | 2017-11-17 | 2018-02-16 | 江苏帕尔克玩具有限公司 | Drying unit is used in a kind of building blocks painting process |
| WO2018176690A1 (en) * | 2017-03-31 | 2018-10-04 | 济宁学院 | Energy-saving environmentally-friendly integrated fluidized bed drying system and processing method based on multi-stage microwave heating |
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| CN110411151A (en) * | 2019-07-12 | 2019-11-05 | 云南民族大学 | A kind of device and method of microwave hot air combined drying brown coal |
| CN111702164A (en) * | 2020-05-29 | 2020-09-25 | 同济大学 | Processing device for improving sphericity of 3D printing metal powder and application thereof |
| CN113121076A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | Oil sludge sand treatment method |
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